• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    SUMMARY The invention relates to a device for controlling a single gas flow, for example from a respiratory system connected to a single patient on exhalation. The river control is done by compressing a flexible rudder with circular flexible segments in the longitudinal direction of the rudder, whereupon the flexible elements collapse against a circular cradle. The device consists of autoclave parts or disposable parts that can be separated from the respiratory system without exposing personnel, such as the handheld system, to contaminated surfaces in the respiratory system when changing patients. To be published with Fig. 1
    公开号:SE1050483A1
    申请号:SE1050483
    申请日:2010-05-17
    公开日:2011-11-18
    发明作者:Goeran Cewers
    申请人:Mindray Medical Sweden Ab；
    IPC主号:
    专利说明:

    The construction is small and light and the actuator which controls the valve can be made small and is isolated from the flow channel.
    The most common design of exhalation valves today consists of a circular disc that lies against one end of a tube that forms a valve seat. Examples of such a design can be read in patent US 5,127,400. The disadvantages of such a design are that the flow channel is complex, which causes turbulence and problems with cleaning. In addition, the entire circular disc is subjected to a pressure, while the flow depends only on the outer edge of the disc. This means that an unnecessarily strong, heavy and expensive actuator is needed to control such a valve.
    The object of the invention is to make a valve which fulfills the previously mentioned important design parameters.
    Summary of the invention These objects are achieved by means of the device according to the appended independent claims, wherein particular embodiments are dealt with in the dependent claims.
    The present invention thus seeks in particular to counteract, improve or eliminate one or more of the above-identified shortcomings and disadvantages in conventional technology, individually or in any combination, and at least partially solves the above-mentioned problems by providing an equipment according to the appended claims.
    The invention can be described as a valve comprising a first flexible element having at least one flexible zone; a valve seat located either outside or inside the flexible member in such a way that a fluid can pass a channel between the first flexible member and the valve seat; at least one actuator unit arranged to axially compress or decompress the first flexible element, the first flexible element being angled radially towards or rotting up from the valve seat and thus the flow of the fluid through the valve can be controlled. When the flexible element is in its normal position, the valve is open and a flow of the fluid, which can be described as substantially turbulence-free, can take place in the channel between the flexible element and the valve seat. A flexible element in this invention consists of one or more flexible zones which act as guides so that the flexible element can be angled or slid radially in the direction of the valve seat when the flexible element is subjected to an axial compressing or decompressing movement from an actuator unit. As the flexible element angles, at least one area of the flexible element touches the valve seat. Preferably, the touching area is the flexible zone and preferably the area or zone is designed so that a tight-fitting effect occurs between the angled flexible element and the valve seat.
    The valve is preferably rotationally symmetrically formed with a coaxial arrangement of the valve seat and the flexible element.
    By axial directional movement is meant here a direction which is longitudinal or towards the flow direction which takes place between two openings located on each side of the flexible element. By radial directional movement is meant here a movement in a direction substantially vertical to the direction of flow.
    In some embodiments, the flexible elements of the valve are designed and positioned so that they can be in at least one position where a side of smooth character arises which is located on the flow side of the duct.
    Due to this construction, a substantially turbulence-free flow can be obtained in the open position, which reduces the flow resistance of the fluid through the flow channel.
    In some embodiments, the valve comprises at least one second flexible element and the first flexible element is arranged to restrict the flow while at least one second flexible element is positioned so that the relative axial movement can be performed. Thus, a deformation or wear of the first flexible element is avoided by repeated folds.
    To facilitate the placement of a valve between two non-flexible inflow and outflow channels, additional flexible elements can be used so that the axial compressing or decompressing movement of the flexible element closing for the valve can be performed. This means that there are no loads on the material or on the attachments to the non-flexible inlet and outflow channels.
    In some embodiments, the valve seat consists of a rotationally symmetrical circular wall located in the center of the first flexible element, such as the outside of a rod, the inside or the outside of a pipe.
    In some embodiments, the valve seat has a rotationally symmetrical conical profile and is located in the center of the first flexible element downstream. This design and placement of the valve seat facilitates the creation of a substantially turbulence-free flow.
    Valve can also be designed so that the valve seat consists of a rotationally symmetrical circular wall which may comprise the inside of a tube, placed around the first flexible element.
    In another embodiment, the valve construction material for the flexible element and the valve seat are autoclavable and / or the construction material for the flexible element and the valve seat are disposable material, or the construction comprises parts of autoclavable material in combination with parts of disposable material. Examples of such materials are silicone rubber, stainless steel, etc.
    The choice of these materials enables the valve to be used for medical equipment such as a respirator. Thus, patient-contaminated valves can be safely cleaned and disinfected between different patients.
    The valve is, for example, an exhalation valve in a respirator.
    In some embodiments, the valve actuator assembly is comprised of at least one piezoelectric actuator. In other embodiments, the actuator unit can also consist of at least one voice coil actuator. Other types of actuator units may also be suitable.
    Another advantage of the construction is that the actuator unit of the valve can be arranged without having contact with the flow channel, which means that the actuator unit does not have to be autoclavable. This simplifies handling and increases the life of the actuator unit.
    In some embodiments, the valve has an integrated flow meter. In particular, at least two ultrasonic transceivers are placed along the flow channel to measure the flow through the channel. A compact unit can thus be provided. The unit provides an advantageous fast control of the flow through the valve as the distance between the flow meter and the valve can be kept short and turbulence is avoided.
    In a second aspect, the invention comprises a method of controlling a flow through at least one fluid passage, the method comprising axially compressing or decompressing at least one flexible element of a valve, the at least one flexible element being angled radially towards or steered up from a corresponding valve seat . Preferably, the valve is designed as above.
    The advantages of this method are as for the equipment described above. A substantially turbulence-free flow of one or more fluids can be created through a flow channel and in a simple manner restrict the flow if necessary. The flow control is fast and reliable with a compact unit.
    Piezo actuators can be used, which provides a low energy consumption. General Description of the Drawings These and other aspects, features and advantages which the invention at least partially possesses become clearer and specified by the following description of embodiments of the present invention, in which reference is made to the accompanying figures, in which Figure 1 is a schematic cross-sectional view showing an exemplary embodiment in axial cross-sections of a flexible pipe segment; Figure 2 is a schematic cross-sectional view showing an embodiment in an axial cross-section along a valve with the axis of a flexible pipe segment; Figure 3 is a schematic view showing an embodiment of a valve configuration; Figures 4-9 are schematic views showing various embodiments of low pressure valves; Figure 10 is a schematic cross-sectional view of an exemplary embodiment of a low pressure valve with integrated flow meter in the form of ultrasonic transducer elements; and Figure 11 is a schematic plan view showing how grooves in the flexible segments have been added to reduce the axial compression force of the segments.
    Description of embodiments A device according to the invention is obtained by a soft tube, fixed in the ends, for example of silicone rubber, with flexible segments 10, 11 according to figure 1 via a movable ring exposes the flexible tube to an axial movement between the ends so that the flexible elements are affected.
    Figure 1 illustrates such an example. Figure 1 shows in a schematic view an exemplary embodiment of the axial cross section of a flexible pipe segment.
    Figure 1 shows one and the same valve device in two different states. The left picture shows the valve device in the open state, and the right picture in the closed state. In the left image, a first flexible element 10 is shown in uncompressed form, while a second flexible element 11 is in compressed form. The circular bulge 119 of the first flexible member 10 acts as a soft valve member. In this form, the valve device is normally open.
    Centered inside the flexible pipe is a rotationally symmetrical hard body 13, this has been designed in an aerodynamically advantageous manner to minimize the flow resistance in the valve device. The body 13 is a valve seat against which the first flexible element 10 works. The body 13 is fixed via braces, not shown in the figure, to the fixing rings 15 and 16. The fixing rings 15, 16 are arranged on each end of the flexible element which comprises in an integral piece the first and second flexible elements 10, 11.
    When the valve device is in the open condition according to the left picture, Fig. 1, the inside of the flexible pipe is almost completely smooth. This in combination with the design of the middle body 13 makes the flow resistance very low in a valve device like this.
    The valve device is brought into the closed position by the ring 12 being moved axially the distance 113 in the direction of the fixing ring 16 so that the flexible pipe segment 110 is pressed against the body 13. At the same time the pipe segment 111 will be stretched. In this position, the flow profile is no longer optimized, but this is irrelevant as no flow passes through the valve device in the closed position.
    The ring 112 can also be brought into a position between closed and open position. In this case, the valve device functions as a proportional valve. The pipe segment 110 has a slightly different profile compared to the pipe segment 111, the triangular sections are stripped at the top to reduce the mass of the segment and thus increase the resonant frequency of the system. Segment 111 can also be lightened in a similar manner. The ring 12 can also be made extra light e.g. By giving its cross-sectional profile a U-shape, T-shape or the like.
    Unlike the pipe segment 110, the inner profile of the pipe segment 111 is conically shaped on the inside when the valve device is in the open condition. The advantage of this design is that the flow profile becomes more favorable at the same time as a smaller movement needs to be taken up by this segment, which means that it can be made smaller and lighter, which contributes to an increased resonant frequency in the system, which in turn provides better control properties.
    Figure 2 shows in a schematic view an exemplary embodiment in axial cross-section along the axis of a flexible pipe segment, according to a principle of the invention. Such an advantageous embodiment of the invention illustrated in Figure 2 is a device which can be easily lifted out of the chassis of the apparatus which without and that it is intended to sit in, e.g. a respirator, the patient's hose system for exhalation is opened, the chassis is thus kept uncontaminated. The hose system can then be moved for cleaning, destruction or recycling.
    When the device according to Figure 2 is lifted off, only the parts 27, 28, 200 and 201 remain in the chassis part. belongs to a part of the device, These parts the actuator part. The other parts belong to the valve part.
    After the valve part is lifted out, the patient hoses can be removed from the end pieces 20 and 21, the valve part of the device contains three parts which can be separated and autoclaved.
    The first part of the valve part consists of a first end piece in hard material, e.g. plastic. This part constitutes the inlet for the expiration valve, the fastening lugs 202 and the struts 203 and consists of the end piece 20 which is also the inlet, which holds the middle body 26.
    The second part of the valve part consists of a soft tube of, for example, silicone rubber, with two flexible sections 23 and 24, and the end fits 22 and 25. Also a guide ring 29 in hard material, e.g. plastic is threaded over the soft hose of the valve part 10 15 20 25 30 35 according to figure. The function of the ring 29 is to transmit movement from the actuator part to an axial compression of the first flexible segment 23 so that it is forced radially against the center body 26 when the valve is to be brought into the closed position.
    The third part of the valve part consists of a second end piece in hard material, e.g. plastic. This part constitutes the outlet for the expiration valve, 21. and consists of the end piece. The actuator part consists of a flexible foil 200 which, when applying the valve part in the chassis, hooks into the guide ring 29 and a strut 201 which, when the valve closes, moves in the direction of the arrow.
    The strut 201 is further connected to an actuator, which may be electromagnetic, thermal, chemical, magnetostrictive or piezoelectric.
    Figure 3 shows in schematic view an embodiment of a valve configuration. The view shown in figure 3 of the valve part is seen from above. Hair can be distinguished from the inlet piece 30, the soft sectioned hose 32 with guide ring 112, the holders 34 and 35 are anchored in the chassis. The ring 112 is operated so that the fixing ring 33 and the outlet piece 31. close and / or open the valve. The opening of the valve can take place by restoring elasticity in the hose 32.
    Figure 4 shows an example of how an actuator can be connected to the valve part. Here it can be seen how a lever 48, which may be U or Y shaped, for example, transmits the movement from the actuator 406 via a mechanical motion amplifier 405, the shaft 404 and the lower part of the lever 403 to the movable circular ring 43 via a joint 400, hinge or a flexing pivot point, controlled via pivot point 401, for example one and one joint 47.
    The friction is thus kept low. An adjusting device 409 enables trimming of the actuator. Furthermore, there is a temperature compensation unit 407. Holders or guides 45, 46 are attached to the chassis for a snap-fit of the valve body. A fixing ring 44 holds the soft rubber 10 in place and accompanies the valve assembly as it is lifted.
    The inlet 40 and the outlet 41 are connections to the valve unit, for example for 22 mm hoses.
    Figure 5 shows in schematic view an embodiment of a low-pressure valve with a flexible pipe enclosing a rotationally symmetrical body. The upper part of Fig. 5 is a top view while the lower part of Fig. 5 is a side view. In this variant of the valve device, the movement towards the flexible pipe is controlled by means of two actuators. Figure 5 shows such an embodiment, here two piezo actuator units 50 and 51 with flexible link arms 52 and 53 are anchored in the chassis of the valve device. The valve device can be lifted out of the parts belonging to the chassis, and then, for example, autoclaved. A support element 55 is anchored in the chassis.
    Figure 6 shows in schematic view an embodiment of a variant of the low-pressure valve. Instead of piezo actuators as in Figure 5, the valve device can be controlled by an electromagnetic voice coil actuator 60 according to Figure 6.
    Here, the voice coil 61 itself acts directly against the movable disc 62.
    Figure 7 shows in schematic view an embodiment of a low-pressure valve with a hard pipe 70 enclosing a flexible pipe 71. The disc 78 is moved by means of the lever 76 the distance 79 when the valve device is brought into the closed position. As an alternative to a hose enclosing a body, the valve device can be realized with a hard enclosing pipe and a flexible inner hose according to figure 7.
    Here, a movement 79 is transmitted via a lever 76 through a joint and seal 77 to the shaft 74 and further to the movable disc 78 which deforms the movable segment 73 outwards towards the inside of the body 70.
    Figure 8 shows in schematic view an embodiment of a low-pressure valve with the same geometry as in figure 7, but where the lever has been replaced by a piezo actuator 80 which is encapsulated in the flow channel itself. The ring 87 is moved by means of the mechanical amplifier 81 when the valve device 11 is brought into the closed position. The bellows 84 insulates the environment of the actuator 80 from the gas duct.
    Figure 9 shows in schematic view an embodiment of a low-pressure valve with a similar geometry as in Figure 8, but where a cavity 91 is made in the housing 90. This cavity encloses a housing 92 which is anchored in the fan chassis. The actuator element 93 is located in this space.
    In this embodiment of the invention, the device enclosed with the tube 90 can be lifted out of the actuator part. A resilient element 94 in combination with a strut 95 ensures that the movement of the actuator is transmitted to the valve device, and that docking of the units is possible.
    Figure 10 and Figure 11 show in schematic view an exemplary embodiment of a position pressure valve with the same basic design as in Figure 6, but the ultrasonic transducer elements 190 and 191 have been supplied.
    The ultrasonic transducer element 190 is located in the valve device inlet anchored to the struts 192.
    Figure 11 shows in schematic view an exemplary embodiment 111 in the outside of the flexible segments has been applied to reduce the axial compression force of the segments where substantially longitudinal grooves 110.
    权利要求:
    Claims (1)
    [1]
    1. 0 15 20 25 30 35 l2 CLAIMS Valve comprising - a first flexible element having at least one flexible zone; a valve set placed either outside or inside the flexible element on such a set that a fluid can pass a channel between the first flexible element and the valve set; at least one actuator unit arranged to axially compress or decompress the first flexible element, the first flexible element being angled radially towards or steered up from the valve set by means of the movement of the actuator unit and thus a flow of the fluid through the valve channel can be controlled. The valve according to claim 1, wherein at least one flexible zone functions as a joint which is arranged so that the flexible element can be angled radially. The valve according to claim 1 or 2, wherein an area of the first flexible element can, after the first flexible element has been angled radially an relative stack, touch the valve set with a touching area. The valve of claim 3, wherein the adjacent area comprises the flexible zone. The valve according to claims 1-4, wherein the first flexible element has a zone designed so that a tightly closing effect occurs when it touches the valve set. The valve according to claims 1-5, where the flexible elements and the valve set are constructed and 10. 11. 12. 13. 13 placed relative to each other so that the flexible elements are in at least one position which provides a substantially turbulence-free flow through the valve flow channel. The valve according to claims 1-6, wherein the flexible element is designed so that in at least one position a side with a smooth character arises is located on the flow side of the channel. The valve according to claims 1-2, which comprises at least one second flexible element and wherein the first flexible element is arranged to control the flow while the at least one second flexible element is positioned so that the relative axial movement can be performed. The valve according to claims 1-8, wherein the axial movement is along or against the flow direction. The valve according to claims 1-9, wherein the radial movement takes place substantially vertically relative to the flow direction. The valve according to claims 1-10, wherein the valve seat consists of a rotationally symmetrical circular wall placed in the center of the first flexible element, such as the outside of a rod, the inside or the outside of a pipe. The valve according to claims 1-11, wherein the valve seat has a rotationally symmetrical conical profile and is located in the center of the first flexible element downstream. The valve according to claims 1-10, wherein the valve seat consists of a rotationally symmetrical circular wall which may comprise the inside of a tube, placed around the first flexible element. The valve according to claims 1-13, wherein the construction material for the flexible element and the valve seat is autoclavable and or where the construction material for the flexible element and the valve seat is disposable material or where the construction comprises parts of autoclavable material in combination with parts of disposable material. The valve according to claims 1-14, wherein the actuator unit consists of at least one piezoelectric actuator. The valve according to claims 1-15, wherein the actuator unit is arranged without contact with the flow channel. The valve of claims 1-16, wherein at least two ultrasonic transverses are located along the flow channel to measure the flow through the channel. The valve according to claims 1-16, wherein substantially longitudinal grooves (110, 111) are arranged in the outside of the flexible elements. A method of controlling a flow through at least one fluid passage, the method comprising axially compressing or decompressing at least one flexible member of a valve, the at least one flexible member being angled radially toward or straightened from a corresponding valve seat to control said flow.
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    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    CN1018667B|1987-09-30|1992-10-14|东陶机器株式会社|Automatically operating valve for regulating water flow and faucet provided with said valve|
    GB2267951B|1992-06-17|1995-06-07|Imi Santon Ltd|Push-operated taps|
    IT1272370B|1993-04-27|1997-06-23|Nuovo Pignone Spa|PERFECTED METER-REGULATOR OF THE FLOW RATE OF A FLUID|
    US6213144B1|1999-08-25|2001-04-10|Micron Technology, Inc.|In-line valve|
    法律状态:
    优先权:
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    PCT/EP2011/057810| WO2011144541A1|2010-05-17|2011-05-15|Diaphragm valve and method to control a flow|
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