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    • 专利摘要:
    BALANCED FLOW CONTROL VALVE OPERATED BY STEP MOTOR. A flow control valve includes a body having a body hole oriented coaxially with the longitudinal axis of the body and a seat member extending into the hole. A valve member is arranged, delineatically, coaxially in the bore and oriented with the longitudinal axis of the body. The valve member includes a geometrically shaped non-circular head having a hole. A drive adapter includes a sliding head receiving cavity that receives the geometrically shaped head from the valve member and prevents axial rotation of the valve member. A stepper motor is connected to the drive adapter, the stepper motor incrementally rotating a shaft engaged with the hole of the valve member. The first and second pistons of equal diameters of the valve member provide balanced pressure from the operating positions of the valve member.
    公开号:BR112013000938B1
    申请号:R112013000938-1
    申请日:2011-07-08
    公开日:2021-02-23
    发明作者:Paul A.Yahr；Kevin C.Williams
    申请人:Mac Valves, Inc；
    IPC主号:
    专利说明:

    FIELD OF THE INVENTION
    [0001] The present invention relates to balanced flow control valves operated by a stepper motor. BACKGROUND OF THE INVENTION
    [0002] This section provides basic information related to the present disclosure, which is not necessarily state of the art.
    [0003] Flow control valves can be operated by a stepper motor to improve the reproducibility of valve element positions for valves that require greater precision in controlling flow variability between a fully open position and / or a fully closed position . Operations that require an accurate delivery of a volume of liquid or pressure to a working device, therefore, can benefit from the precision of a stepper motor that transmits compared to other known actuators. Known flow control valves operated by a stepper motor, however, generally require a gear system or a multi-directional drive system to change the rotational force of the stepper motor to a longitudinal force used to translate a valve element to open or the valve positions closed. Common operating systems, therefore, lose strength to operate in order to drive the various parts. The complexity, loss of power and tolerance of multiple moving parts of known systems also decrease the accuracy of positioning and repeatability of the valve position (s) which are beneficial reasons for using stepper motors to drive the valve. SUMMARY OF THE INVENTION
    [0004] This section provides a general summary of the disclosure, and is not a comprehensive disclosure of its entire scope or all of its resources.
    [0005] According to several embodiments, a flow control valve includes a body that has an internal diameter of the body oriented coaxially with a longitudinal axis of the body and a seat element that extends into the orifice. A valve element is slidably placed in the orifice and oriented coaxially with the longitudinal axis of the body. The valve element includes a geometrically non-circular head having an orifice. A drive adapter, including a head receiving the sliding cavity, receives the geometrically shaped head of the valve element, preventing axial rotation of the valve element. A stepper motor is connected to a drive adapter. The stepper motor operates to axially rotate an axis directly involved with the orifice of the valve element.
    [0006] According to other embodiments, a flow control valve includes a body having an internal diameter of the body oriented coaxially with a longitudinal axis of the body. A valve element is slidably placed in the orifice and oriented coaxially with the longitudinal axis of the body. The valve element includes a geometrically non-circular head that has an orifice; and at least one radial extending outwardly seating the coupling element and a first and second piston. The first and second pistons have substantially equal diameters, such that a pressurized fluid acting in an opposite manner against the first and second pistons is balanced. A drive adapter includes a sliding head receiving cavity that receives the head geometrically in the form of a valve element and prevents axial rotation of the valve element. A stepper motor is connected to a drive adapter. The stepper motor rotates an axis directly involved inside the valve element orifice to axially translate the valve element.
    [0007] According to other embodiments, a flow control valve includes a body, which has an internal diameter of the body oriented coaxially with a longitudinal axis of the body, and the first and second walls of the cylinder. A valve element is slidably placed in the orifice and oriented coaxially with the longitudinal axis of the body. The valve element includes a geometrically non-circular head that has a threaded hole coaxially aligned with the longitudinal axis. A first piston is positioned at the opposite end of the valve element of the head geometrically in shape. A second piston is positioned between the first piston and the head geometrically. The first and second pistons seal against the cylinder walls of the body as the valve element slides in the body orifice. A drive adapter is attached to the body. The drive adapter includes a sliding head receiving cavity that receives the head geometrically in the form of a valve element and prevents axial rotation of the valve element. A stepper motor is connected to a drive adapter. The stepper motor rotates a threaded shaft directly by screwing into the threaded hole of the valve element.
    [0008] Other areas of application will be evident from the description provided here. The description and specific examples in this summary are for illustrative purposes only and are not intended to limit the scope of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS
    [0009] The drawings described herein are for illustrative purposes only of selected embodiments and not all possible implementations, and are not intended to limit the scope of the present invention.
    [0010] Figure 1 is a left front perspective view of a flow control valve of the present invention;
    [0011] Figure 2 is a final elevation view of the flow control valve in Figure 1;
    [0012] Figure 3 is a partial transverse frontal elevation view made in section 3 of Figure 2;
    [0013] Figure 4 seen in partial frontal transverse elevation of Figure 3, also showing the flow control valve in an open position of the valve;
    [0014] Figure 5 is a cross-sectional elevation view considering section 5 of Figure 3;
    [0015] Figure 6 is a front elevation view in partial cross-section of another embodiment of a flow control valve of the present invention having a vertical stem valve element shown in the closed position of the valve;
    [0016] Figure 7 is the front elevation view in partial cross-section of Figure 6, which further shows the low valve element in an open position of the valve;
    [0017] Figure 8 is a front elevation view in partial cross section of a 3-way flow control valve of the present invention having a spool valve element shown in a completely exhausted position;
    [0018] Figure 9 is the front elevation view of partial cross section of Figure 8 showing the flow control valve in a closed valve position;
    [0019] Figure 10 is the frontal elevation view of partial cross section of Figure 8, which shows the flow control valve in an open position of the valve;
    [0020] Figure 11 is the front elevation view of partial cross-section of a 4-way flow control valve of the present disclosure having a spool valve element shown in a first open valve position;
    [0021] Figure 12 is the front elevation view of partial cross section of Figure 11 showing the flow control valve in a closed position of the valve;
    [0022] Figure 13 is the front elevation view of partial cross section of figure 11 showing the flow control valve in a second open valve position; and
    [0023] Figure 14 is the frontal elevation view of partial cross-section similar to that of Figure 3, which also shows an additional embodiment having an electronic interface device and structure.
    [0024] The corresponding numerical references indicate corresponding parts in the various views of the drawings. DETAILED DESCRIPTION OF THE INVENTION
    [0025] Examples of embodiments will now be described more fully with reference to the accompanying drawings.
    [0026] Examples of embodiments are provided for this disclosure to be thorough and will fully convey the scope to the technicians versed in the subject. Numerous specific details are presented as examples of specific components, devices and methods to provide a complete understanding of the embodiments of the present disclosure. It will be evident to those skilled in the art that specific details need not be used, that the example of the embodiments can be realized in many different ways, and that they should not be interpreted to limit the scope of the disclosure. In some examples of embodiments, known processes, known device structures, and well-known technologies are not described in detail.
    [0027] The terminology used here is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting of the embodiments. As used herein, the singular forms "one", "one" and "o" can be understood as including plural forms, as well, unless the context clearly indicates otherwise. The terms "comprises", "comprising", "including" and "having", are inclusive and therefore specify the presence of indicated characteristics, integers, steps, operations, elements and / or components, but do not exclude the presence or beyond of one or more other characteristics, integers, steps, operations, elements, components and / or groups thereof. The steps of methods, processes and operations described herein are not to be interpreted as necessarily requiring their performance in the particular order discussed or illustrated, unless specifically identified as a performance order. It is also to be understood that additional or alternative steps can be employed.
    [0028] When an element or layer is referred to as being "attached", "attached to", "attached to" or "attached to" another element or layer, it may be directly attached, attached, attached or attached to another element or layer, or intervening layers or elements may be present. In contrast, when an element is referred to as "directly", "directly coupled to", "directly attached to" or "directly coupled to" another element or layer, there may be no intervening elements or layers present. Other words used to describe the relationship between the elements should be interpreted in a way such as (for example, "between" versus "directly between", "adjacent" versus "directly adjacent", etc.) As used herein, the term " and / or "includes any and all combinations of one or more of the associated mentioned items.
    [0029] Although the terms first, second, third, etc., can be used here to describe the various elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Terms such as "first", "second", and other numeric terms, when used here, do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below can be called a second element, component, region, layer or section, without departing from the teachings of the examples of the embodiments.
    [0030] Terms relating to space, such as "interior", "exterior", "below", "under", "lower", "above", "upper" and the like, can be used here to facilitate description for describe an element or relation of recourse to another element (s) or trait (s), as illustrated in the figures. Space-related terms may be intended to cover different orientations of the device in use or operation, in addition to the orientation shown in the figures. For example, if the apparatus in the figures is turned over, the elements described as "low" or "below" other elements or characteristics that would then be oriented "up" to the other elements or characteristics. Thus, the exemplary term "below" can cover both the top and bottom orientation. The device can be oriented in another way (rotated 90 degrees or in other orientations) and the spatially related descriptors used here interpreted accordingly.
    [0031] Referring to Figure 1, a flow control valve 10 includes a body assembly 12, each having a main body portion 14, a drive adapter 16 that can be removably attached to the main body portion 14 , a valve actuator, or the operator in the form of a stepper motor 18, connected to the drive adapter 16, and a removable end cap 20 connected to the main body portion 14 and opposed to the stepper motor 18. According to other embodiments, the drive adapter 16 can be an integral part of the main body portion 14. The main body portion 14 is represented as a shut-off valve being substantially rectangular in shape that allows for a plurality of control valves for flow 10 to be arranged in a side-by-side configuration, however, the disclosure is not limited to a specific valve body design. One or more through-holes 21 can be provided in the main body part 14 to allow mounting of the flow control valve closure 10. The stepper motor 18 can be powered remotely from a power supply (not shown) .
    [0032] Referring to Figure 2, the flow control valve 10, as noted earlier, may have a substantially rectangular shape, in which each of the main body portion 14, the drive plate 16, and the stepper motor 18 it can have substantially equal widths to control an overall flow control valve width 10. A height of each of the components, such as the main body portion 14 or the stepper motor 18 can vary as needed.
    [0033] Referring to Figures 3 and 4, other features of the flow control valve 10 include a spool valve element 22, which is slidably disposed within a spool receiving hole 24 of the main body portion 14 of the spool valve element 22. It is coaxially translatable on a longitudinally mounted axis 26 of the body assembly 12. The distributor valve element 22 includes a first piston 28, which has a first resilient sealing element 30, such as a ring -O or a D-ring positioned in a first sealing groove 32, which provides a fluid seal between the first piston 28, and a first cylinder wall 34 created internally within the main body portion 14 of the valve element spool 22 is slidably positioned in each of the first direction "A" and a second opposite direction "B" by the driving force of stepper motor 18.
    [0034] The main body part 14 further includes a first end of the body 35 having a first wall of the cylinder 34 created therein. The first piston 28 is slidably received in a first piston orifice 36 of the first end of the body 35 defined by the first cylinder wall element 34. The distributor valve 22 may also include a second piston 38 which has a second sealing element resilient 40 similar to the first elastic sealing element 30 positioned in a second sealing groove 42. The second elastic sealing element 40 provides a fluid pressure limit between a second piston of the perimeter wall 44 and a second cylinder wall 46 created at a second end of the body 48 of the main body portion 14. According to various embodiments, a diameter "V" of the first piston 28 is substantially equal to the diameter "W" of the second piston 38. In addition, a diameter "X" of a seat coupling component 50 is substantially equal to the diameter of "V" and "W", so that the steering forces of a pressurized fluid in the receiving orifice d and spool 24 will be "balanced" or acting in the same and opposite way against equal exposed surface areas of the first piston 28 and seat coupling element 50 of a closed position valve (shown in Figure 3), and balance against equal areas surface area of the first and second pistons 28, 38 in the open position of the valve (shown in Figure 4). Spool valve element 22 and other valve elements of the present disclosure are therefore defined as pressure balanced models.
    [0035] The seat coupling element 50 is a radial extension out of the spool valve element 22. As shown in Figure 3, the spool valve element 22 can be positioned such that the coupling component of the seat 50 contacts a seat element 52 of the main body part 14 in the closed position valve that isolates a fluid under pressure in an inlet opening 54 from a first outlet port 56. According to various embodiments, seat coupling element 50 can be supplied with a resilient material 58 over-molded on the seat coupling element 50. The elastic material 58 provides a glandular fluid seal when it comes in contact with the seat element 52. When the spool valve element 22 is moved in the second direction "B" (as shown in Figure 4 after complete movement), a flow passage 60 is created between the coupling elements of the seat 50 and the resilient material and 58 of the seat element 52 that allows the flow of fluid under pressure from the inlet port 54 to the first outlet port 56.
    [0036] Since an outer perimeter of the seat coupling element 50 (defined by the resilient material 58) and each of the first and second pistons 28, 38 have substantially equal diameters, the spool valve element 22 is the pressure in relation to either the closed valve or the open valve position. For example, in the closed position of the valve shown in Figure 3 pressurized, the fluid acts against the coupling element of the seat 50 in the first direction "A" is equaled by the actuation force of the pressurized fluid in the second piston 38 in the second direction "B" for the Ascertained axial force acting on the spool valve element 22, is substantially zero, from the pressurized fluid. In the open position of the valve shown in Figure 4, a relative pressure condition is also present when fluid is flowing through a fully open flow control valve part 10. When flow passage 60 is opened as shown in Figure 4, there is a pressure differential between the inlet port 54 and the first outlet port 56, however, the pressure of the fluid acting on the first piston 28 in the first direction "A" is substantially equal to the pressure force of the fluid acting on a left side of the seat coupling element 50, while the fluid pressure acting on the second piston 38 in the second direction "B" is substantially equal to the fluid pressure actuation force on a right side of the seat coupling component 50, so that the determined axial force acting to translate the spool valve element 22 is substantially zero.
    [0037] The spool valve element 22 is coaxially translated in relation to the longitudinal axis of the assembly 26 by a rotational force created by stepper motor 18. To convert the rotational force created by stepper motor 18 to a longitudinal or axial driving force , the distributor element 22 further includes a geometrically shaped head 62 positioned close to the second piston 38 and at an opposite end of the spool valve element 22 with respect to the first piston 28. The term "geometrically shaped" the head as defined herein refers to a geometric shape that is non-circular (that is, it cannot be completely circular). Shapes, such as oval or a perimeter that has at least one planar face and according to various embodiments multiple planar faces on the perimeter that can include triangular, rectangular, octagonal, and geometries, as they can be used. According to various modalities, geometrically shaped head 62 is substantially rectangular in shape, which allows the spool valve element 22 to be created from stock of rectangular shaped bars and machined or formed to provide the remaining resources, as first and second pistons 28, 38 and seat coupling element 50.
    [0038] Geometric shaped head 62 is received by the receiving cavity of the sliding head receiving 64, which may include a plurality of cavity faces 66, which combine with the corresponding geometrically shaped head faces 62. The non-circular geometry of the geometrically shaped head 62 prevents axial rotation of the spool valve element 22 in relation to the longitudinal axis 26, when the assembly is guided by the rotational force of the stepper motor 18. According to various embodiments, a tilt element 68, such as a compression spring, can be received against a geometrically shaped head end face 70. An opposite end of tilt element 68 abuts with stepper motor 18. Tilt element 68 applies a force bias in the first "A" direction to wind valve element 22 to eliminate thread gap between 72 male threaded shaft 74 and a female blind thread hole 76 created in the second piston 38, so that the spool valve element 22 can be repeatedly placed in the open position by a predetermined number of revolutions of the stepper motor 18, which can vary according to a spacing of the threads 72.
    [0039] The second head receiving cavity 78 is created between the face end 70 of the geometrically shaped head 62 and the stepper motor 18. If a volume of the receiving head cavity of the second head 78 varies with the spool valve element 22 transfer in any of the first or second directions "A" or "B". A plurality of head faces 80 corresponding to a number of flat faces on the perimeter of the head geometrically shaped 62 adjoin those of the individual face cavity 66 to prevent axial rotation of the spool valve element 22. Where the non-flat faces are present in the geometric shaped head 62, such as an oval shape, when used, the shape of the receiving cavity head 64 has a shape that corresponds to the shape of the perimeter of the head in geometrically shape 62.
    [0040] The male threaded shaft 74 can be directly or indirectly connected to and rotatably driven by the stepper motor 18, and is directly screwed into the female thread receiving hole 76 aligned coaxially with respect to the longitudinal axis 26 in the valve element assembly spool 22. The rotation of the male thread shaft 74, therefore, directly axially drives the distributor element 22 based on a number of complete or partial turns of the male thread shaft 74, which are predetermined to move between one of the open or closed valve positions. The position of the axial spool valve element 22 is repetitive based in part on the limited slip between the threads of the male threaded shaft 74 and female thread 76. The tilt element 68 further polarizes the spool valve element 22 to mitigate changes axial dimensions resulting from thread clearances and / or wear. In addition, the previously described balanced pressure design of the spool valve element 22 substantially eliminates a liquid-axial force acting on the spool valve element 22 due to the pressurized fluid in any of the operating positions of the spool valve. flow control 10 to further increase the repeatability of the spool valve element position 22.
    [0041] The main body portion 14 further includes an end face of the body 82, which is substantially flat and removable to receive the end cap 20, for example, using fasteners (not shown). To vent the fluid present in the first piston 36 as the first piston 28 axially translated, the first piston orifice 36 is in fluid communication with a plug passage of the end cap 84. The passage end 84 can include a filter 86 to prevent the entry of contaminants, such as dirt or water into passage 24. Fluid, like air, can thus be designed or exhausted to equalize the pressure of the fluid in the first piston orifice 36 with the atmospheric pressure for any axial position of the element of spool valve 22.
    [0042] Referring to Figure 5, and as previously mentioned, the geometric shaped head 62 can be provided with a rectangular shape. The cavity face 66 each corresponds to one of the head faces 80 with a clearance interval 87 provided over a head circumference in geometric shape 62. It must be evident from the geometry of the head in geometric shape 62 is shown in Figure 5 that the axial rotation of the male threaded shaft 74 in relation to the longitudinal mounting axis 26 will not rotate the head in the same geometrically shape in the form of 62 or spool valve element 22. The gap 87 can also be dimensioned to allow the transfer of fluid over a geometrically shaped head perimeter 62 as a spool valve element 22 translates, thus, that the fluid pressure is substantially equalized at each head cavity reception 64 and the second head cavity reception 78 shown and described with reference to figures 3 and 4.
    [0043] In the configuration shown in Figure 5 and referring again to Figures 3 and 4, the use of a right thread on the male threaded shaft 74 together with a first direction of rotation of the male threaded shaft pistons 74 by a motor of step 18 in a direction of rotation Y "will pull spool valve element 22 to the viewer as seen in Figure 5 and in the first direction A", as shown in Figure 3. A second opposite or counterclockwise direction of rotation of the shaft male thread 74 by stepper motor 18 in a direction of rotation "Z" will push the spool valve element 22 away from the observer as seen in Figure 5 and in the second direction "B", as shown in Figure 4. it will be evident that the use of a left thread on the male thread shaft 74 (and for female thread 76) can produce opposite directions of the spool path.
    [0044] Referring to Figure 6 and again to Figures 3 and 4, according to other embodiments of a flow control valve 88 using the unit functions of the present disclosure, they can also be used to operate a pressure regulating valve. Flow control valve 88 may include a valve body 90 with a drive adapter 92 similar to drive adapter 16 slidably connected thereto. Stepper motor 18 'is similarly connected to drive adapter 92 having a male threaded axle 74' that extends axially therefrom. A pressure regulating valve element 94 is slidably arranged on a longitudinal axis 96 of the valve body 90. Valve seat element 94 includes a first piston 98 slidably arranged and seal received in a first piston cavity 100 of the body valve seat 90. Seat valve element 94 may include a "shaped" seat coupling element 102 that has, for example, a material, such as rubber or a resilient polymeric overmolded material (i.e., molded and extends out from the) the seat valve element 94 coupling element. The seat coupling element 102 contacts a valve seat element ring 104 in a closed position of the shown valve. In the closed position of the valve an inlet opening 106 is insulated from an outlet port 108 to prevent fluid flow through the flow control valve 88.
    [0045] With reference to Figures 6 and 7, the seat valve element 94 further includes a female threaded hole 110 which receives the screwing of the male threaded shaft 74 'of the stepper motor 18'. The rotation of the stepper motor 18 ', therefore, operates similarly to the operation of the stepper motor 18 described with reference to Figures 3 and 4 above, to axially move the seat valve element 94 in the closing direction of the valve "C" to reach the closed valve position. The pressure regulating valve element 94 also includes a second piston 112, which has a diameter substantially equal to the diameter of the first piston 98. In the closed position of the valve shown in Figure 6 the pressurized fluid acts against the coupling element of the seat 102 in the direction closing pressure "C" is equalized by the pressurized fluid force under first piston 98 in an opening direction of the "D" valves, so the net axial force acting on the seat valve element 94 is substantially zero from the fluid pressurized.
    [0046] The second piston 12 is slidably arranged with respect to a second cylinder wall 114 of the valve body 90. A geometrically shaped head 116 is created at one end of the opposite vertical stem valve element 94 positioned relative to to the first piston 98. The geometric shaped head 116 is slidably received in a head receiving cavity 118 which can include a plurality of cavity faces 120 corresponding to the geometric shaped flat faces (or non-flat geometry) of the shaped head geometrically 116. The geometrically shaped head 116 in contact with a plurality of cavity face 120 therefore prevents rotation of the vertical stem valve element 94 during axial translation of the vertical stem valve element 94. For the reasons noted above with respect to the embodiment of Figures 3 and 4, the geometry-shaped head 116 can also be oval-shaped, or include a single or multiple head. the flat surfaces at its perimeter to prevent axial rotation of the seat valve element 94.
    [0047] Referring more specifically to Figure 7, an open valve position of the fluid control valve 88 is provided to the stepper motor 18 'rotating in an opposite axial rotation direction compared to the rotation to the closed position shown in reference to Figure 6. As the seat valve element 94 displaces axially in the direction of opening of the "D" valve and the seat engagement element 102 displaces the ring of the seat valve element 104, a flow passage 122 is created, which allows the incoming port flow from 106 to 108 outgoing connections. Because first and second pistons 98, 112 of seat valve element 94 have substantially equivalent diameters, the pressure forces acting on the seat valve element 94 are balanced when the flow control valve 88 is in a partially valve fully open flow control unit 88 as follows. In the open position of the valve, the flow passage 122 is opened and there is a pressure differential between the inlet port 106 and the port port outlet 108, however, the fluid pressure acting on the first piston 98 in the opening direction "D "is substantially equal to the actuation force of the fluid pressure on a side facing downwards from the coupling element of the seat 102 (directed in the closing direction" C "), while the pressure of the fluid acting on the second piston 1 12 in the direction closing force "C" is substantially equal to the fluid pressure force acting on an upward side of the seat coupling element 102 (directed towards the opening of "D"), in such a way that the determined axial force acting for transferring the spool valve element 94 it is substantially zero. This pressure balance reduces the amount of force required by the stepper motor 18 'to return the valve to a closed position of the valve, and also when the valve is positioned closed and / or in any partially open position.
    [0048] Referring to figure 8, according to other embodiments of a flow control valve 160 includes a 3-way valve body 162 modified from flow control valve 124 shown and described with reference to Figures 3 and 4, to include additional elements of the seat coupling and overmoulded seat elements, therefore, only the differences will be described here. A spool valve element 164 is slidably placed in the hole of a receiving spool 166 and includes a first overmold seat coupling element 168 and a second overmold seat coupling element 170. In an exhaust position of the overflow valve flow control 160 of an entrance opening 172 is closed to an exit door 174 and an escape opening 176 of door. The outlet 174 is open to the exhaust opening 176. The first coupling element of the overmoulded seat 168 is displaced from a first seat element 178, thus creating a first flow passage 180 for fluid communication between the orifice. outlet 174 and an exhaust port 176. The second overmounted seat coupling element 170 contacts a second seat element 182 in the fully exhausted position. The spool valve element 164 is completely moved in a first direction "G" to reach the exhaust position, by rotating a male threaded shaft 76 "through the stepper motor 18".
    [0049] With reference to Figure 9 and again Figure 8, in a closed position of the flow control valve 160 it is created by the translation of spool valve element 164 in a second direction "H" in front of the first direction "L" until the first and second overmoulded coupling seat elements 168, 170 contact the first seat element 178 and the second seat element 182, respectively. In the closed valve position, the inlet port 172, the outlet port 174, and the exhaust port 176 are closed to each other without having common flow paths between them. As the spool valve element 164 moves in the second direction of "H", air is drawn into the vent opening 154 'to equalize the atmospheric pressure in the first piston orifice 152'.
    [0050] Referring to Figure 10, an open position of the flow control valve 160 is created by a greater translation of the cylindrical spool valve element 164 from the closed position towards the second "H" until the second coupling of the overmolded seat 170 displaces with respect to the second seat element 182, thereby creating a second flow passage 186. The second flow passage 186 provides fluid communication between the inlet port 172 and the outlet port 174, while the exhaust port 176 is closed to the two input ports 172 and output port 174 by contact between the first overmolded seat coupling element 168 and the first seat element 178. For the same reasons previously discussed here, the spool valve element 164 is a pressure balanced design so that fluid pressure forces acting on the spool valve element 164 are balanced in all operating positions of the flow control valve 160.
    [0051] With reference to Figure 11, a flow control valve 188 is modified from the flow control valve 160 shown and described with reference to Figures 8 - 10, by adding other valve ports and seating elements of spool valves. Flow control valve 188 includes a 4-way valve body 190 having a sliding spool valve element 192 positioned within a receiving spool 194 of the 4-way valve body 190. The spool valve element 192 includes a first , second, third and fourth 4-way valve body and seat coupling element 196, 198, 200, 202 and 190. Each also includes an inlet port 204, a first outlet port 206, a first outlet port discharge 208, a second outlet port 210, and a second exhaust port 212. The spool valve element 192 is slidably arranged on a longitudinal axis 214.
    [0052] In a first open position of the flow control valve 188, a spool valve element 192 is slidably arranged in the first "L" direction to its maximum extent by operating the stepper motor 18 "to rotate the 74 ”male threaded shaft. Axial rotation of the spool valve element 192 is prevented by the geometric shape of the drive adapter 92", which does not rotatively receive a geometrically shaped head 148. In the first open position, the entry port 204 is the first outlet port 206 is opened and both the first exhaust port 208 is closed. A first flow passage 216 is created in the vicinity of the overmolded seat coupling element 200 to allow fluid flow from the inlet port 204 through of the first outlet port 206. Also in the first open position of the flow control valve 188, a first exhaust passage 218 is created by displacing the first engaging element overmolded seat adjustment 196 while the second overmolded seat coupling element 198 is maintained in a sealing condition. The first exhaust port 218 provides for fluid communication between the second outlet port 210 and the second exhaust port 212, while inlet port 204 is closed, both the second outlet port 210 and a second exhaust port 212.
    [0053] With reference to Figure 12 and, again, Figure 11, in a closed position of the flow control valve 188 is created by the spool valve element translating 192 in a second "H" direction, which is opposite to the first "L" direction, until all the first, second, third and fourth seat molding elements 196, 198, 200, 202 are seated and sealed. In the closed position of flow control valve 188, all doors are closed individually to each other preventing any flow of fluid discharge from the inlet port 204 to any of the outlets.
    [0054] Referring to figure 13, a second open position of flow control valve 188 is created by posterior axial translation of the spool valve element 192 in the second direction of "H", up to the second coupling element of the overmolded seat 198 and fourth seat coupling element 202 are molded out of their seated positions. A second flow passage of 220 created in the vicinity of the second coupling element of the overmolded seat 198 provides fluid communication between the inlet port 204 and a second outlet port 210. The second outlet port 212 is closed to the two outlet ports. inlet 204 and a second outlet port 210 in the second open position. Also in the second open position, a second exhaust port 222 is created in the vicinity of the fourth coupling element of the overmoulded seat 202. Second exhaust port 222 provides fluid communication between the first outlet port 206 and the first discharge port 208, while the fluid pressure in the inlet port 204 is closed to both the first outlet port 206 and the first discharge port 208. For the same reasons previously described here, a spool valve element 192 provides a balanced pressure model, so that the fluid pressure forces acting on the spool valve element 192 are balanced in all operational positions of the flow control valve 188.
    [0055] Referring to Figure 14, a flow control valve 224 includes an electronic interface box 226 having an electronic interface device 228 that receives an operating command signal, such as an analog signal or a digital signal, or a voltage or current through a control line 230. The control line 230 is connected via an electrical connector 232 that seals the electronic interface 226 from the atmosphere and provides for connection to an electrical power source for the valve to function flow control 224. The command signal received by the electronic interface device 228 is converted, if necessary, to an output required for the operation of stepper motor 18 and transmitted via a second control line 234 to stepper motor 18 "'to cause rotation of the stepper motor 18" and thus the axial translation of the spool valve element 22'. A drive adapter 236 in the flow control valve 224 is an integral part of a main body part 238. A male thread extension 240 extends from a geometric shaped head 242 of spool valve element 22 '. Extension 240 may be an integral part of the geometrically shaped head 242, or it may be a threaded male fastener coupled to geometrically shaped head 242. Extension 240 is received by screwing into a hole 244 of the stepper motor 18 "', which can be a hole with a female thread. The rotation of the stepper motor 18"' co-rotates the part of the motor containing the hole 244, which screwed around the extension 240 is the axially translated spool valve element 22 '.
    [0056] Each of the valves of this flow control disclosure provides variable flow control by incrementally rotating a stepper motor. Incremental rotation of the stepper motor is translated into an axial translation of a valve element. In addition, as the valve element moves to an open position, a pressure drop is created through the through holes. As the orifice into which the valve element is received sliding has equal diameters at the contact points of the valve and valve element body, each section swing port acts on the valve element.
    [0057] The valves of this flow control disclosure offer several advantages. By providing balanced seat or spool pressure models for all embodiments of the flow control valve, fluid pressure forces acting on the spool or seat do not increase the required operating force of the stepper motors of the present disclosure. Stepper motors, therefore, only have to overcome static friction and sliding friction of forces during the translation of the seat or spool valve elements. The geometric shaped heads provided with each of the seats or spool valve elements of the present invention prevents rotation of the spool valve elements or valve allowing the rotational force of the stepper motor to be directly translated into the seat or element spool valve by a male threaded coupling shaft extending from the stepper motor, which is screwed directly into a threaded hole in the valve element. The male threaded shaft and the geometrically shaped head are positioned on an adapter element positioned between the valve body and the stepper motor. This design eliminates additional clutch elements, key elements, anti-rotation screws, and others to prevent rotation of the seat or spool element during translation.
    [0058] The previous description of the embodiments has been provided for purposes of illustration and description. It is not intended to be exhaustive or to limit the invention. The individual elements or characteristics of a particular embodiment, in general, are not limited to that particular embodiment, but, where applicable, are interchangeable and can be used in a selected embodiment, even if it is not specifically shown or described. It can also be varied in many ways. Such variations are not to be considered as departing from the scope of the invention, and all such modifications are intended to be included within the scope of the invention.
    权利要求:
    Claims (31)
    [0001]
    1. Flow control valve (10, 224) characterized by the fact that it comprises: a body (14) of rectangular shape that has four longitudinal faces that extend parallel to a longitudinal axis (26) of the body (14), the body (14) which defines an internal diameter of the body oriented coaxially with the longitudinal axis (26) of the body (14) and a seat element (52) which extends into the body orifice (14); a valve element slidably placed in the orifice (24) of the body and oriented coaxially with the longitudinal axis (26) of the body, the valve element including: rectangular shaped head (62) showing four faces of the head (80); a cylinder-shaped spool valve element (22) extending integrally from the rectangular-shaped head (62), the cylinder-shaped spool valve element (22) having a resilient sealing element (30) sliding mode and sealingly engaging a cylinder wall of the inner diameter of the body during the sliding movement of the valve element in the orifice of the body; and a threaded orifice formed through both the rectangular shaped head (62) and the cylinder shaped spool valve element (22); a drive adapter (16, 236), including a receiving cavity (64) of the rectangular-shaped head (62) slidably receives the rectangular-shaped head (62) of the valve element element, while preventing axial rotation of the valve element , the receiving cavity (64) of the head still providing a gap (87) over an entire perimeter of the head in a rectangular shape (62), with the fluid in the orifice (24) of the body prevented from entering the gap (87) or in the receiving cavity (64) of the head of the sealing element (30); and a stepper motor (18) connected to the drive adapter (16), the stepper motor (18) operating to rotate axially on an axis directly engaged with the valve element to axially move the valve element element; an entrance door (54) extending through the body (14) from the hole (24) of the body to one of the longitudinal faces of the body (14) to define a longitudinal face carried on the body, wherein the entrance door (54) is open to the carried longitudinal face and is closed to the other longitudinal faces of the body (14); and an exit door (56) arranged in a side-to-side relationship with the entrance door (54), the exit door (56) which extends through the body of the hole (24) of the body (14) to the longitudinal carried side of the body (14), in which the exit door (56) is open to the carried longitudinal face and is closed to the other longitudinal faces of the body; and in which the cylindrical shaped valve element has a diameter that creates a tolerance adjustment close to the diameter of the orifice and in which the valve element tapers from the rectangular shaped head to the cylindrical spool valve element , such that the rectangular shaped head of the valve element has a predetermined width that is larger than the diameter of the cylindrical spool valve element.
    [0002]
    2. Flow control valve (10, 224) according to claim 1, characterized by the fact that the rectangular shaped head (62) includes at least one flat head face (80).
    [0003]
    3. Flow control valve (10, 224) according to claim 2, characterized by the fact that the receiving cavity (64) of the head includes four faces of the cavity (66) that touch the four faces of the head rectangular shape (62) to prevent axial rotation of the valve element.
    [0004]
    4. Flow control valve (10, 224) according to claim 1, characterized in that the valve element further includes at least one coupling element (50), which extends radially outwards from of the valve element which seals in engagement with the seat element (52) defining a closed position of the flow control valve (10, 224).
    [0005]
    5. Flow control valve (10, 224), according to claim 4, characterized by the fact that the rotation of the shaft neither a first direction operates to longitudinally move the valve element in the orifice (24) of the body from from the closed position to an open position of the flow control valve (10, 224), and rotation of the shaft in a second opposite direction operates to return the valve element from the open position to the closed position of the valve.
    [0006]
    6. Flow control valve (10, 224) according to claim 1, characterized by the fact that the valve element further includes: a first piston (28) positioned at the opposite end of the valve element from the head rectangular in shape (64); and a second piston (38) defining the spool valve element (22) of cylindrical shape positioned between the first piston (28) and the rectangular head (62), the first and second pistons (28, 38) which they operate to seal against the cylinder walls of the body, as the valve element slides in the orifice (24) of the body.
    [0007]
    7. Flow control valve (10, 224) according to claim 6, characterized in that the first and second pistons (28, 38) have substantially equal diameters, such that a pressurized fluid acting opposite to the first and second pistons (28, 38) result in balanced pressure forces acting on the valve element.
    [0008]
    8. Flow control valve (10, 224), according to claim 1, characterized by the fact that it also comprises an electronic interface device (228) that receives a command signal and converted by the electronic interface device (228 ) at a power for the operation of the stepper motor (18).
    [0009]
    9. Flow control valve (10, 224), according to claim 8, characterized by the fact that it also includes an electronic interface box (226) having the electronic interface device (228) disposed in it and a connector electrical sealing of the electronic interface box (226) from the atmosphere and providing electrical connection to the flow control valve (10, 224).
    [0010]
    10. Flow control valve (10, 224), according to claim 1, characterized by the fact that the valve element is received slidingly in the body (14).
    [0011]
    11. Flow control valve (10, 224), according to claim 1, characterized by the fact that the threaded orifice receives the shaft in a threaded manner, the shaft being a male threaded shaft (74) connected to and extending from the stepper motor (18), such that the progressive rotation of the stepper motor turns the male threaded shaft (74) which is screwed into the axially threaded hole to incrementally translate the valve element.
    [0012]
    12. Flow control valve (10, 224), according to claim 1, characterized by the fact that the rectangular head (62) has the axis integrally connected to and extending away from it, the axis being a male threaded shaft (74) still engaged in a threaded manner with a female threaded hole (76) of the stepper motor (18), so that the incremental rotation of the stepper motor (18) and the female threaded hole (76) which engages in a threaded manner to the axle to axially translate incrementally into the valve element.
    [0013]
    13. Flow control valve (10, 224), according to claim 1, characterized by the fact that the drive adapter (16) is removable connected to the body.
    [0014]
    14. Flow control valve (10, 224), according to claim 1, characterized by the fact that the actuation adapter (16) is integrally connected with the rectangular body and head (62) of the control element The valve is received slidingly into the receiving cavity (64) of the head having four faces of the cavity (66) combined with the four faces of the head (80) of the head in a rectangular shape (62) preventing the axial rotation of the valve element.
    [0015]
    15. Flow control valve (10, 224) according to claim 1, characterized in that the valve element defines a spool valve element (22).
    [0016]
    16. Flow control valve (10, 224) according to claim 1, characterized in that the valve element defines a regulating valve element (94).
    [0017]
    17. Flow control valve (88, 160) characterized by the fact that it comprises: a body (14) that has a hole in the body (24) oriented coaxially with a longitudinal axis (26) of the body (14) and a cover end (20) in contact with the body (14) which has an end cap passage (84) through the end cap (20) in communication with the body orifice (24) to ventilate the body orifice (24 ), the orifice of the body (24) having an orifice diameter: a valve element slidably placed in the orifice of the body (24) and oriented coaxially with the longitudinal axis (26) of the body (14), the valve element (22) including: a rectangular shaped head (62) and a cylindrical shaped body portion (164), which are integrally connected with each other, as part of the valve element, both the rectangular shaped head (62) and the cylindrical body portion (164) having a threaded hole (76) created therein; and at least one seat coupling element (50) extending radially outwardly and first and second pistons (28, 38), which are integrally connected with one another, as part of the valve element, the first and second pistons (28, 38) having substantially equal diameters that create a tolerance adjustment close to the diameter of the orifice, such that a pressurized fluid acting in the opposite way against the first and second pistons (28, 38) is balanced; a drive adapter (92), including a head receiving cavity (64) slidably receiving the rectangular shaped head (62) from the valve element and preventing axial rotation of the valve element; a stepper motor (18) connected to a drive adapter (92), the stepper motor (18) by rotating an axis (74) directly involved inside the threaded hole (76) of the valve element (22) to translate axially the valve element; and the flow control valve (10, 224) having a substantially rectangular shape, in which each of the body (14), the end cap (20), the drive adapter (92) and the stepper motor (18 ) have substantially equal widths that define the total width of the flow control valve (10, 224); and the cylindrical body portion (164) of the valve element having a diameter that creates a tolerant fit with the diameter of the orifice, in which the valve element tapers from the rectangular head (62) to the cylindrical shaped body portion (164) such that the rectangular shaped head (62) of the valve element has a predetermined width that is greater than the diameter of the cylindrical shaped body portion (164).
    [0018]
    18. Flow control valve (10, 224) according to claim 17, characterized in that the at least one seat coupling element (50) extending radially outwardly comprises first and second elements of seat coupling, each having a diameter equal to the diameter of the first and second pistons (28, 38) and the diameter of the cylindrically shaped body portion (164) of the valve element.
    [0019]
    19. Flow control valve (10, 224) according to claim 18, characterized in that the body is a 3-way valve body (162), including: first and second seat elements (178, 182) extending to the body orifice (24); and an entrance door (172) positioned longitudinally between the drive adapter (92) and the second seat element (182), an exit door (174) positioned longitudinally between the first and second seat elements (178, 182) , and an exhaust port (176) positioned longitudinally between the end cap (20) and the first seat element (178).
    [0020]
    20. Flow control valve (10, 224) according to claim 19, characterized in that in the open position of the valve the first seat coupling element contacts the first seat element (178) and the second element seat coupling is displaced from the second seat element (182) having the entrance door (172) in communication with the exit door (174) and both the entrance door (172) and the exit door ( 174) isolated from the exhaust port (176); and wherein in a closed valve position, the first seat coupling element contacts the first seat element (178) and the second seat coupling element contacts the second seat element (182) having the inlet, outlet ports , and exhaust (172, 174, 176) isolated from each other.
    [0021]
    21. Flow control valve (10, 224) according to claim 19, characterized in that the first seat coupling element is displaced from the first seat element (172) and the second coupling element seat contacts the second seat element (182) defining an escape position having the exit door (174) in communication with the escape door (176) and the entrance door (172) insulated from both the exit door outlet (174) and the exhaust port (176).
    [0022]
    22. Flow control valve (10, 224) according to claim 18, characterized in that the at least one seat coupling element (50) extending radially outwardly comprises first, second, third and four seat coupling elements (196, 198, 200, 202) each having a diameter equal to the diameter of the first and second pistons (28, 38).
    [0023]
    23. Flow control valve (10, 224) according to claim 18, characterized in that the body is a 4-way valve body (190), including: a plurality of extending seating elements into the body hole (24) positioned individually to be contacted by one of the seat coupling elements; and an entrance door (204), first and second exit doors (206, 210), and first and second escape doors (208, 212).
    [0024]
    24. Flow control valve (10, 224) according to claim 17, characterized in that the body (14) is a 2-way valve body, including: a seat element (52) which extends into the body orifice (24); and an inlet port (106) and an outlet port (108), the at least one seat coupling element (50) extending radially outwardly contacting the seat element (52) in a closed position of the valve isolating the input port (106) from the output port (108).
    [0025]
    25. Flow control valve (10, 224) characterized by the fact that it comprises: a body (14) having at least one longitudinal face that extends parallel to a longitudinal axis (26) of the body (14), the body ( 14) defining first and second cylinder walls and an orifice of the body (24) oriented coaxially with the longitudinal axis (26) of the body (14); a valve element slidably placed in the body orifice (24) and oriented coaxially with the longitudinal axis (26) of the body (14), the valve element including: a geometrically non-circular head (62) having an orifice threaded (76) aligned coaxially with the longitudinal axis (26) which extends through the head in a geometrically non-circular manner (62); a first piston (28) positioned at the opposite end of the head valve element in a geometrically non-circular shape (62); and a second piston (38) positioned between the first piston (28) and the head in a geometrically non-circular shape (62) and integrally connected to the head in a geometrically non-circular shape (62), with the threaded hole (76) being extends to the second piston (38), the first and second pistons (28, 38) seal against the cylindrical walls of the body (14), as the valve element moves slidingly through the body orifice (24); a drive adapter (92) connected to the body (14), the drive adapter (92) including a head receiving cavity (64) which slidably receives the geometrically non-circular head (62) from the valve element and preventing axial rotation of the valve element; a stepper motor (18) connected to a drive adapter (92), the stepper motor (18) rotating a threaded shaft (74) directly screwed into the threaded hole (76) of the valve element; a first seat element (178) defined by the body (14) extending between at least one longitudinal face of the body (14) and the body hole (24), the first seat element (178) having an outer end further away from the drive adapter (92) and a central line that laterally forks the first seat element (178); a second seat element (182) defined by the body (14) extending between at least one longitudinal face of the body (14) and the orifice of the body (24), the second seat element (182) having an outer end arranged closer to the drive adapter (92) and a central line that laterally forks the second seat element (182); an entrance door (172) extending through the body (14) from the body hole (24) to at least one longitudinal face of the body (14) which is positioned longitudinally between the drive adapter (92) and the second seat element (182); an exit door (174) which extends through the body (14) of the body orifice (24) to at least one longitudinal face of the body (14) which is positioned longitudinally between the first seat element (178) and the second seat element (182); an exhaust port (176) extending through the body (14) from the body orifice (24) to at least one longitudinal face of the body (14) which is positioned longitudinally between the end cap and the first element seat (178); the first and second seat elements (178, 182) which define a spacing equal to the distance between the outer edges of the first and second seat elements (178, 182) and a center line spacing equal to the distance between the center lines of the first and second (178, 182) seat elements; and the valve body further includes a first seat coupling element (168) and a second seat coupling element (170) extending from the valve body which are longitudinally spaced from each other by a seat distance, which is less than the outer spacing of the first and second seat elements (178, 182) and greater than the centerline spacing of the first and second seat elements (178, 182) in such a way that the valve body can be moved to one of: an open position of the valve, where the first seat coupling element (168) contacts the first seat element (178) and the second seat coupling element (170) is displaced from the second element (182) to allow fluid communication between the entrance door (172) and the exit door (174) and isolate both the entrance door (172) and the exit door (174) from the exhaust door ( 176); a closed valve position, where the first seat coupling element (168) contacts the first seat element (178) and the second seat coupling element (170) contacts the second seat element (182) to isolate the door inlet (172) and the outlet port (174) and the exhaust port (176) from one another; and an exhaust position, where the first seat coupling element (168) is displaced from the first seat element (178) and the second seat coupling element (170) contacts the second seat element (182) to allow fluidic communication between the outlet port (174) and the exhaust port (176) and isolate both the outlet port (74) and the exhaust port (176) from the inlet port (172).
    [0026]
    26. Flow control valve (10, 224) according to claim 25, characterized by the fact that it further comprises: a tilting element (68) received against an end face (70) of the geometrically shaped head circular (62) and an opposite end that abuts the stepper motor (18), the tilting element (68) applying a biasing force to the valve element to eliminate a thread gap between the threaded shaft (74) and the threaded orifice (76) of the valve element that allows the valve element to be repeatedly positioned in an open position by a predetermined number of revolutions of the stepper motor (18), which can vary according to a spacing of the threads.
    [0027]
    27. Flow control valve (10, 224) according to claim 25, characterized in that the first and second seat coupling elements (168, 170) extend radially outwards from the element valve to seal, coupling with the first and second seat elements, when the valve body is defined in the closed position.
    [0028]
    28. Flow control valve (10, 224) according to claim 27, characterized by the fact that the diameter of the first and second pistons (28, 38) and a diameter of the first and second seat elements (168 , 170) are substantially equal, so that a pressurized fluid force acting against the first piston (28) is balanced by a pressurized fluid force acting against the first and second seat coupling elements (168, 170) when the valve body is placed in the closed position.
    [0029]
    29. Flow control valve (10, 224) according to claim 27, characterized in that the diameter of the first piston (28) is substantially equal to the diameter of the second piston (38), so that a pressurized fluid force acting against the first piston (28) is balanced by a pressurized fluid force acting against the second piston (38), when the valve is placed in the open position.
    [0030]
    30. Flow control valve (10, 224) according to claim 25, characterized in that the valve element is a spool element (22) that has a diameter of the first and second pistons (28, 38) and a diameter of the first and second seat coupling elements (168, 170), being substantially the same.
    [0031]
    31. Flow control valve (10, 224) according to claim 25, characterized in that the valve element is a compound regulating element having a diameter of the first and second seat coupling elements (168, 170) larger than the diameter of the first and second seat elements (178, 182).
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    同族专利:
    公开号 | 公开日
    AU2011279500A1|2013-02-07|
    HK1185136A1|2014-02-07|
    PT2593699T|2020-05-22|
    MX336213B|2016-01-11|
    PL2593699T3|2020-10-19|
    EP2593699A1|2013-05-22|
    AU2011279500B2|2016-05-26|
    IN2013CN00332A|2015-07-03|
    CN103238016B|2015-11-25|
    CN103238016A|2013-08-07|
    US8939173B2|2015-01-27|
    BR112013000938A2|2016-05-17|
    EP2593699B1|2020-02-19|
    CA2805185C|2015-12-22|
    ES2785100T3|2020-10-05|
    US20160169401A1|2016-06-16|
    KR20130091332A|2013-08-16|
    KR101961883B1|2019-03-25|
    MX2013000561A|2013-05-09|
    US20120012768A1|2012-01-19|
    EP2593699A4|2017-12-27|
    CA2805185A1|2012-01-19|
    WO2012009208A1|2012-01-19|
    JP2013534602A|2013-09-05|
    ZA201300292B|2015-04-29|
    JP5893619B2|2016-03-23|
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    法律状态:
    2018-12-26| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|
    2019-07-09| B06T| Formal requirements before examination [chapter 6.20 patent gazette]|
    2020-06-09| B06A| Notification to applicant to reply to the report for non-patentability or inadequacy of the application [chapter 6.1 patent gazette]|
    2020-12-01| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2021-02-23| B16A| Patent or certificate of addition of invention granted|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 08/07/2011, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    US12/836,214|US8939173B2|2010-07-14|2010-07-14|Stepper motor operated balanced flow control valve|
    US12/836,214|2010-07-14|
    PCT/US2011/043298|WO2012009208A1|2010-07-14|2011-07-08|Stepper motor operated balanced flow control valve|
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