• 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:
    The oscillating cylinder arrangement (100) of the invention comprises a working cylinder (10A) and inside it a piston rod (27A) movably disposed and a control cylinder assembly (20) for the working cylinder (10A). The control valve assembly (20) comprises a main valve (24) which directs the pressure medium to the first sub-chamber or second sub-chamber of the working cylinder (10A) and provides a linear movement (A, B) and of arms (25, 26) controlled pulse valves (22, 23) which set into the operating position of the main valve (24). The working cylinder (10A) is provided with guide means (27B) attached to the movable piston rod (27A), which control means (27B) are arranged to contact the arms of the pulse valves (25, 26) and thereby determine the end positions of the movement of the piston rod (27A).
    公开号:FI20175931A1
    申请号:FI20175931
    申请日:2017-10-20
    公开日:2019-04-21
    发明作者:Vesa Ropponen
    申请人:Pneumaxpert Oy；
    IPC主号:
    专利说明:

    The invention relates to a control arrangement for an oscillating cylinder. The oscillating cylinder arrangement comprises a slave cylinder, a master cylinder of a slave cylinder for controlling compressed air to different parts of the slave cylinder, and impulse valves which control the change of movement of the slave cylinder in an actuator controlled by an oscillating cylinder. The impulse valves are controlled by a control means mounted on the outside of the cylinder of the piston rod movable in the working cylinder. The guide means can be attached to a plurality of positions on the piston rod. Due to the piston movement, the control means hit the lever arms of the impulse valves according to the invention to determine the extreme positions of the piston movement directions.
    BACKGROUND OF THE INVENTION
    Oscillating cylinders are used in the industry to provide repetitive, mostly reciprocating, actuator movement in some process device. The oscillating cylinder has a reciprocating piston and an associated piston rod extending to two opposite sides of the oscillating cylinder. At the first end of the piston rod there is an actuator which is used on the oscillating cylinder. At one end of the piston rod there is at least one guide member, such as a guide disk, whose contact with the impulse valves for controlling the oscillating cylinder causes a change in the direction of movement of the piston rod. The positions of the guide discs on the piston rod are adjustable so that the operation of the process unit can be changed as needed. In one known solution, the impulse valves are located between the adjustable guide discs, whereby the piston rod also has to move quite far away from the rear end of the oscillation cylinder, even at short stroke lengths. In this case, the guide discs need to be mounted on the piston rod much further apart than would be required by the actuator's required stroke length on the oscillating cylinder.
    In the arrangement of Fig. 1 of WO 2006/056642, the impulse valves are located in the space between the adjustable counter-discs for controlling the impulse valves as described above. Such an arrangement requires a great deal of space and the mechanical structure of the oscillating cylinder arrangement becomes long.
    20175931 prh 20 -10- 2017
    WO 2006/056642 also describes another type of oscillating cylinder and discloses the placement of a control valve and impulse valves for determining its state.
    Fig. 1 illustrates another type of oscillating cylinder shown in Fig. 2 of WO 2006/056642, the overall size of which has been shortened by controlling the impulse valves 5 by suitable lever arrangements 13 which contact the guide discs 4 mounted on the movable piston rod 18. In this solution,
    In Fig. 2 of WO 2006/056642, the guide discs 4 are still on the piston rod
    18, but they may be quite close to each other. However, neither of the impulse valves 5 used is located between the guide discs 4. The movement of the guide discs 4 is transmitted by means of separate movable guide arms 13 to the impulse valves 5. The guide arms 15 13 are secured to the body of the oscillation cylinder 1 by means of a pivotable mounting bracket. When one of the described control discs 4 hits one of the control arms 13, the impulse valve 5, the opening of which is controlled by the said control arm 13, opens. Hereby, the direction of movement of the piston rod 18 is reversed. When the second piston rod guide disk 4 later hits the second piston rod 13, the second impulse valve opens. Then, under the control of the impulse valve, the direction of movement of the piston rod changes again. Thereby a reciprocating motion of the working cylinder piston is obtained, which in turn causes a movement of the actual actuator, which may also be a linear reciprocating motion.
    In the oscillating cylinder of Fig. 2 of WO 2006/056642, the guide discs may be substantially closer to each other than in the oscillating cylinder of Fig. 1 of the same publication. The external dimension required by the oscillating cylinder can then be reduced in the direction of movement of the piston shaft.
    In the structure of Fig. 2 of WO 2006/056642, impulse valves 5 are disposed on the two sides of the cylinder piston rod 18 on the inside of the end cap 15 which serves to protect the control valve 10 (Fig. 3). In such an impulse valve arrangement, the cover portion 15 becomes wide and also high in the direction of the piston shaft so as to
    20175931 prh 20 -10- 2017 Impulse valves with controls can be protected by a cover part. The lid portion 15 must also allow the piston movement 18 to its extreme position at the rear end of the oscillating cylinder where the impulse valves 5 are. In this case, the lid part 15 must also be shaped high enough to allow movement of the piston rod 18. Such a cover part 5 15 requires complex machinable parts and is thus expensive in manufacturing.
    Thus, there is a need for an oscillating cylinder arrangement comprising both impulse valves, a control valve body and also a piston rod, so that it is as small in design as possible in the movement direction of the piston of the oscillating cylinder and is economically cost effective and reliable.
    OBJECTIVE OF THE INVENTION:
    It is an object of the invention to provide a new oscillating cylinder arrangement which can significantly reduce the drawbacks and disadvantages of prior art oscillating cylinder arrangements.
    The objects of the invention are achieved by an oscillating cylinder arrangement in which the oscillating cylinder structure comprises a main valve and impulse valves integrated in the same housing.
    An advantage of the invention is that it is possible to reduce the outside dimension of the oscillating cylinder in the direction of the piston shaft compared to known solutions.
    A further advantage of the invention is that the control valve structure becomes narrower in the transverse direction of the piston shaft when the impulse valves are already in the main valve body and thus the main valve covers can be made thin
    A further advantage of the invention is that all flow channels 30 of the control valve structure are in the same housing, so that fewer gaskets and connections are present.
    20175931 prh 20 -10- 2017
    BRIEF DESCRIPTION OF THE INVENTION
    An oscillating cylinder arrangement according to the invention comprising a slave cylinder having a movable piston rod mounted on the control members and a slave cylinder control valve structure which in turn comprises a main valve for transmitting pressure to the first that the operating state of the impulse valves is arranged to be determined by the lever arms guiding the impulse valves exiting the main valve body and that the lever arms are arranged to contact the control means in the extreme positions of the piston rod movement.
    Certain preferred embodiments of the invention are set forth in the dependent claims.
    The basic idea of the invention is as follows: The oscillating cylinder arrangement according to the invention comprises a prior art working cylinder and a control valve structure attached to one end of the working cylinder. The control valve structure, in turn, comprises a main valve of the oscillating cylinder with a pressure medium which is preferably pressurized. The operating position of the main valve determines in which sub-chamber of the slave cylinder, either the first sub-chamber or the second sub-chamber, the pressure medium is supplied to provide linear movement of the piston rod moving in the slave cylinder. The same control valve structure also has impulse valves controlling the movement direction of the main valve stem. The control of the state of the impulse valves preferably utilizes one or more lever arms disposed in one direction of movement of the piston and disposed on one side of the main valve body, at least one of the preferably disk-like control members on the piston rod being arranged to hit either piston rod. The action of the control member on the lever arm pivots the lever arm whose pivoting movement is arranged to open the said impulse valve. The opening of the impulse valve, in turn, changes the flow of pressure medium from the main valve to the sub-chamber of the slave cylinder, whose rise in pressure forces the piston rod to change its direction of motion by 180 degrees.
    20175931 prh 20 -10- 2017
    DETAILED DESCRIPTION OF EXAMPLES OF THE INVENTION
    The invention will now be described in detail. Referring to the accompanying drawing, FIG. an embodiment of the main valve according to the invention.
    The embodiments in the following description are exemplary only and one of ordinary skill in the art may implement the basic idea of the invention in a manner other than that described in the description. Although the specification may refer to one embodiment or embodiments at multiple locations, this does not mean that the reference is directed to only one embodiment described, or that the feature described is useful in only one embodiment described. The individual features of two or more embodiments may be combined to provide new embodiments of the invention.
    Figure 1, which shows a flow diagram of an oscillating cylinder solution, is shown in conjunction with the prior art description.
    Fig. 2 is an exemplary operation diagram of an oscillating cylinder arrangement 100 according to the invention.
    The oscillating cylinder arrangement 100 controls the movement of the actuator 3 in some industrial process. The motion may be, for example, a reciprocating linear motion of the actuator 3 illustrated in Fig. 2 by a double-headed arrow whose extreme positions are indicated by the letters A and B.
    20175931 prh 20 -10- 2017
    The linear motion is achieved by a reciprocating piston 27 mounted on the piston rod 27A in the working cylinder 10A. In the working cylinder 10A, the direction of movement of the piston 27, either in the direction A or in the direction B, is determined by the higher pressure in the variable volume compartments 10A1 or 10A2 of the working cylinder 10A formed on different sides of the piston 27. The pressure medium flows to the first sub-chamber 10A1 through the connection 31 and to the second sub-chamber 10A2 through the connection 32. Preferably, the pressurized medium used is compressed air which is supplied or discharged through the connections 31, 32 from the main valve 24 controlling the operation of the working cylinder 10A. The compressed air from the compressed air network is supplied to the main valve 24 oh10 from the compressed air supply 30.
    The flow of compressed air at the connections 31 and 32 is controlled by the main valve 24. Preferably, the main valve 24 has a spindle arranged to move from an extreme position to another extreme position. In the first spindle extreme position, the main valve 24 feeds compressed air 15 through connection 31 to the first sub-chamber 10A1 of the slave cylinder 10A and at the same time opens the exhaust duct 33 outlet 33.
    The control of the spindle of the main valve 24 is effected by impulse valves 22 and 23 acting as pressure relief valves which alternately release pressure from the main valve 24 to control the movement of the spindle. However, a small amount of compressed air flows continuously from the throttle nozzles 28A, 28B to the portion of the duct system 25 extending from the impulse valves 22, 23. However, the flow apertures of the impulse valves 22 and 23 are larger than the flow apertures of the throttle nozzles 28A and 28B, so that said impulse valves 22, 23, when controlled, are capable of providing a sufficiently rapid pressure drop to change the operating mode of the main valve 24. The impulse valves 22 and 23 are controlled by the lever arms 25 and 26 by one or more control members 27B fixed to the piston rod 27A movable in the working cylinder 10A.
    To simplify the design of the oscillating cylinder, the impulse valves 22 and 23 are located in the body of the main valve 24. 2
    In the embodiment of the 20175931 prh 20 -10-20 2017, the lever arms 25 and 26 controlling the impulse valves 22 and 23 are mounted on the body of the main valve 24 on two opposite sides of one side so as to extend suitably against one or more guide members 27B mounted on the piston rod 27A. The covers of the main valve 24 are preferably simple plate-like parts. In the control valve assembly 20 according to the invention, all the channels required for the control of the valves are contained within the body of the main valve 24, so that the oscillating cylinder arrangement 100 according to the invention is inexpensive and reliable.
    If the spindle in the main valve 24 has seals, there will always be some friction. If the pressure of the compressed air entering the oscillating cylinder arrangement 100 drops too low, there is a risk that the pressure in the volume between the nozzle and the impulse valve that causes the control valve spindle 24 to move will not be sufficient to effectively push the spindle to the other extreme position. In this case, the movement of the slave cylinder will not change.
    In order to prevent such a malfunction, an additional volume of compressed air ductwork extending from the control duct nozzles 28A, 28B to the impulse valves 22, 23 is provided in the oscillating cylinder arrangement 100 according to the invention. Advantageously, additional volumes may be obtained by increasing the diameter of the duct system or by making additional ducts, references 21A and 21B, or chambers 29B, 29B as additional reservoirs for compressed air. In a preferred embodiment of the invention, additional volume can be machined at both ends of the spindle of the main valve 24, for example by drilling therein as shown in Figure 4B, or by adding stroke limiting projections to both ends of the spindle 24 as shown in Figures 4C and 4D. The air tanks thus formed are preferably more than 2 times the volume displaced by the spindle of the main valve (24) when moving from one extreme position to another.
    Figure 3 is a perspective view of an oscillating cylinder arrangement 100 according to the invention. The piston 27 in the working cylinder 10A moves back and forth in the direction A <-> B. Preferably, the piston rod 27A at the end shown in Figure 3 is
    20175931 prh 20 -10- 2017 annular control member 27B. The control valve assembly 20 is secured to one end of the working cylinder 10B so that it is below the piston rod 27A in the example of Figure 3. When the piston rod 27A moves sufficiently far in the direction A, the control member 27B on the piston rod 27A will eventually hit the pulse 25 of the valve 22.
    The movement of the tip of the lever arm 25 in the direction A causes the impulse valve 22 to open its outlet valve. The pressure drop caused by the impulse valve 22 directs the mandrel valve spindle to such a position that the compressed air in the first sub-chamber 10A1 of the working cylinder 10A is deflected. Then, the higher pressure of the compressed air directed to the second sub-chamber 10A2 of the working cylinder 10A turns the pin10 in the direction of movement 27A when the control member 27B on the piston rod 27A reaches the lever arm 26 of the second impulse valve 23.
    Figures 4A, 4B, 4C and 4D illustrate alternative embodiments of the invention for providing additional 15 volumes in control ducts.
    Figure 4A shows a preferred embodiment of the mandrel 240A of the main valve 24A of the first invention. At each end of the spindle 240A there are lugs projections. The pin protrusion 240A1 provides an additional volume 29A1 to the first end 20 of the main valve 24A. The pin protrusion 240B1 provides an additional volume 29B1 to one end of the main valve 24A.
    Figure 4B shows a preferred embodiment of the mandrel 240B of the main valve 24B of the present invention. Cavities are drilled at both ends of the spindle 240B. Drilled cavity 29A2 provides additional volume to the first end of mandrel 240B of main valve 24B. The drilled cavity 29B2 provides additional volume at one end of the spindle 240B of the main valve 24B.
    Figure 4C illustrates a preferred embodiment of the mandrel 30C 240C of a third main valve 24C according to the invention. Both ends of the main valve 24C are provided with cavities having a diameter smaller than the 240C diameter of the mandrel 24C spindle. Thus, at each end of the main valve there are shoulders defining the extreme positions of the spindle 240C. Thus, a first cavity 29A3 is formed at the first end of the main valve 24C, into which the mandrel 240C is unable to advance. Correspondingly, a cavity 29B3 is formed at the other end of the main valve 24C, into which the mandrel 240C cannot pass.
    Figure 4D shows a preferred embodiment of the fourth main valve 24D and the mandrel 240D according to the invention. In this embodiment, the pin portion of the main valve 24D is provided with pin projections per spindle 240D at both ends. The pin protrusion 240D1 provides additional volume 29A4 to the first end of the main valve 24D. The pin protrusion 240D2 provides additional volume at one end of the 24B4 main valve 24D 10.
    In the oscillating cylinder arrangement 100 according to the invention, the control valve control valve structure 20 utilized is of such small dimensions that it can accommodate a circular sector smaller than 1/3 of the area of the circular 15A rear end 10B of the working cylinder 10A.
    Some preferred embodiments of the oscillating cylinder solution of the invention have been described above. The invention is not limited to the solutions just described, but the inventive idea can be applied in a number of ways within the scope of the claims.
    权利要求:
    Claims (7)
    [1]
    An oscillating cylinder arrangement (100) comprising:
    - a working cylinder (10A) and a piston (27) arranged to move within it, with arms (27A)
    A control valve structure (20) for the working cylinder (10A), comprising:
    - a main valve (24) for supplying pressure medium (31, 32) to the first sub-chamber (10A1) or the second sub-chamber (10A2) of the working cylinder (10A) to provide linear movement (A, B) of the piston (27);
    - the impulse valves (22, 23) and the lever arms (25, 26) guiding them,
    10 In (24) to set the operating mode, and
    - control elements (27B) attached to the piston rod (27A) movable in the working cylinder (10A), characterized in that the operating state of the impulse valves (22, 23) is arranged to be determined by lever arms 26 arranged to control the impulse valves (22, 23) ) and that the control means (27B) is arranged to contact the lever arms (25, 26) of the impulse valves (22, 23) for determining the extreme positions of movement of the piston rod (27A).
    [2]
    Oscillating cylinder arrangement according to Claim 1, characterized in that the main valve (24) and the impulse valves (22, 23) are formed on the same short body of the control valve structure (20) in the direction of movement (A, B) of the working cylinder (10A).
    [3]
    Oscillating cylinder arrangement according to Claim 2, characterized in that the lever arms (25, 26) used to control the impulse valves (22, 23) are arranged.
    25 projecting from the same outer side of the main valve (24).
    [4]
    An oscillating cylinder arrangement according to claim 1, characterized in that an additional volume is formed in the duct system of the main valve (24), the additional chambers (29A, 29B), the bores 21A, 21B or the projections (240A1, 240B1) of the spindle (240A) or
    30 bore (240B) bores (29A2, 29B2) to maintain control pressure at operating level.
    [5]
    An oscillating cylinder arrangement according to claim 1, characterized in that an additional volume is formed in the channel of the control valve structure (20) in the channel between the nozzles (28A, 28B) and the outlets of the impulse valves (22, 23) by increasing the channel.
    5 more than 2 times the volume displaced by the spindle of the main valve (24) when moving from the first end position to the second end position.
    [6]
    An oscillating cylinder arrangement according to claim 3, characterized in that the lever arms (25, 26) are arranged to contact the same sector of the control member (27B),
    10 which is less than 1/3 of the area of the rear end (10B) around the center axis of the oscillating cylinder.
    [7]
    Oscillating cylinder arrangement according to claim 3, characterized in that the impulse valves (22, 23) are arranged with the main valve (24, 24A, 24B, 24C, 24D).
    15, the control valve structure (20) fits within a circle sector less than 1/3 of the total surface area of the rear end (10B) of the oscillating cylinder.
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    法律状态:
    2018-09-10| PC| Transfer of assignment of patent|Owner name: POLARTEKNIK OY |
    2019-03-07| PC| Transfer of assignment of patent|Owner name: PIMATIC OY |
    2019-10-31| FG| Patent granted|Ref document number: 128135 Country of ref document: FI Kind code of ref document: B |
    优先权:
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    FI20175931A|FI128135B|2017-10-20|2017-10-20|Arrangement with oscillating cylinder|FI20175931A| FI128135B|2017-10-20|2017-10-20|Arrangement with oscillating cylinder|
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    PCT/FI2018/050768| WO2019077207A1|2017-10-20|2018-10-19|Oscillation cylinder arrangement|
    US16/757,399| US11168714B2|2017-10-20|2018-10-19|Oscillation cylinder arrangement|
    CN201880078445.8A| CN111433466A|2017-10-20|2018-10-19|Oscillating cylinder device|
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