Pneumatic valve damping system

Abstract

The pneumatic valve damping and shock absorption system provided by the present invention belongs to the field of air circuit control technology, and includes: a cylinder, which has a piston and a pneumatic rod connected to the piston; a valve, which has a drive frame connected to the pneumatic rod of the cylinder and a valve plate connected to the drive frame; a buffer circuit, which is connected to at least one air vent of the cylinder, and the buffer circuit includes: a first regulating branch and a second regulating branch arranged in parallel, the first regulating branch is provided with a first one-way speed regulating valve, and the second regulating branch is provided with an electromagnetic valve; in the pneumatic valve damping and shock absorption system of the present invention, when the cylinder is exhausting, the gas can pass through the second regulating branch at a faster speed, and can only pass through the first regulating branch at a slower speed, so that when the piston is about to move into place, the exhaust speed can be slowed down by allowing the exhaust to pass through the first regulating branch, thereby reducing the noise of the pneumatic valve when closing.

Description

Technical Field

[0001] The invention relates to the technical field of air path control, and in particular to a pneumatic valve damping and shock absorption system. Background Art

[0002] Pneumatic valves have a solid position in the field of vacuum valves due to their simple structure, easy air source acquisition, high opening and closing speed, and can be directly used in explosion-proof applications.

[0003] However, since pneumatic valves are driven by gas, the gas is compressible and the driving speed is difficult to control, which causes the pneumatic valves to vibrate greatly when closed. Therefore, pneumatic valves require good damping and shock absorbing devices. Summary of the invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defects of large vibration and noise of pneumatic valves in the prior art, thereby providing a pneumatic valve damping and shock absorption system.

[0005] In order to solve the above technical problems, the present invention provides a pneumatic valve damping and shock absorption system, comprising:

[0006] A cylinder having a piston and a pneumatic rod connected to the piston, one end of the pneumatic rod extending outward;

[0007] A valve, internally provided with a drive frame connected to the pneumatic rod of the cylinder and a valve plate connected to the drive frame;

[0008] The buffer circuit is connected to at least one vent of the cylinder, and the buffer circuit includes: a first regulating branch and a second regulating branch arranged in parallel, the first regulating branch is provided with a first one-way speed regulating valve, and the second regulating branch is provided with a solenoid valve.

[0009] As a preferred solution, it also includes:

[0010] a first main gas circuit, one end of which is connected to a vent of the cylinder and the other end of which is suitable for being connected to a gas source, wherein a second one-way speed regulating valve is provided on the first main gas circuit, and a speed of adjustment by the second one-way speed regulating valve is greater than a speed of adjustment by the first one-way speed regulating valve;

[0011] a second main gas circuit, one end of which is connected to another vent of the cylinder, and the other end of which is suitable for being connected to the gas source, wherein a third one-way speed regulating valve is provided on the second main gas circuit, and the speed of adjustment by the third one-way speed regulating valve is greater than the speed of adjustment by the first one-way speed regulating valve;

[0012] The buffer circuit is suitable for being connected to at least one of the first main gas circuit and the second main gas circuit through a two-position five-way solenoid valve.

[0013] As a preferred solution, when the pneumatic rod of the cylinder is driven forward, one of the two air vents of the cylinder is an air inlet and the other is an air outlet;

[0014] The first main gas path is communicated with the gas inlet, the second main gas path is communicated with the gas outlet, and the buffer circuit is adapted to be communicated with at least the second main gas path via a two-position five-way solenoid valve.

[0015] As a preferred solution, a magnetic switch is provided on the cylinder near the air outlet, the magnetic switch is connected to a controller, and the controller is electrically connected to the solenoid valve.

[0016] As a preferred solution, the valve comprises:

[0017] A housing, arranged opposite to the cylinder;

[0018] A driving frame, slidably disposed in the housing, connected to the pneumatic rod of the cylinder, and having a first buffer structure between the driving frame and the housing;

[0019] The valve plate is slidably arranged in the shell, is rotatably connected to the driving frame through a connecting rod, and has a second buffer structure between the valve plate and the shell.

[0020] As a preferred solution, the first buffer structure includes:

[0021] A drive frame positioning device, arranged on the drive frame;

[0022] The limiting buffer block is arranged on the shell and has a buffer body facing the positioning device of the driving frame.

[0023] As a preferred solution, the second buffer structure includes:

[0024] The valve plate positioning seat is arranged on the valve plate and comprises a positioning block and a positioning wheel which are arranged in parallel toward the shell body, and a buffer pad is protrudingly arranged on the positioning block.

[0025] As a preferred solution, the positioning blocks have two groups, which are respectively arranged on both sides of the positioning wheel.

[0026] As a preferred solution, the buffer pad has at least five layers, which are respectively made of rubber material, polyurethane material and polytetrafluoroethylene material.

[0027] As a preferred solution, the buffer pad comprises:

[0028] The first buffer pad is located at the bottom layer and is a rubber material provided in at least two layers;

[0029] A second cushioning pad, located on an upper layer of the first cushioning pad, is a polyurethane material provided with at least two layers;

[0030] The third buffer pad is located on the upper layer of the second buffer pad and is a single-layer polytetrafluoroethylene material.

[0031] The technical solution of the present invention has the following advantages:

[0032] 1. The pneumatic valve damping and shock absorption system provided by the present invention is connected to a buffer circuit on the air vent of the cylinder. When the cylinder is exhausting, it needs to pass through the buffer circuit. Two parallel branches are provided on the buffer circuit. Through the second regulating branch, the gas can pass through at a faster speed. When the second regulating branch is closed, the gas can only pass through the first regulating branch at a slower speed. Therefore, when the piston is about to move into place, the exhaust can be allowed to pass through the first regulating branch to slow down the exhaust speed, thereby reducing the noise of the pneumatic valve when closing, and achieving the valve in place without impact.

[0033] 2. In the pneumatic valve damping and shock absorption system provided by the present invention, the switching between the first regulating branch and the second regulating branch is performed through a solenoid valve, which has the advantages of easy control and fast switching speed.

[0034] 3. The pneumatic valve damping and shock absorption system provided by the present invention has a first buffer structure and a second buffer structure on the valve. When the valve plate is in place, the positioning block on the valve plate contacts the shell, and the valve plate is smoothly positioned in place through the buffer pad on the positioning block; when the drive frame is in place, the driving frame positioning device contacts the limit buffer block, and buffering is achieved through the buffer body on the limit buffer block, so as to achieve full-process buffering control of the valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0036] Figure 1 It is a schematic diagram of the main structure of an implementation mode of the pneumatic valve damping and shock absorption system of the present invention.

[0037] Figure 2 for Figure 1 A cross-sectional view of the limit buffer block shown.

[0038] Figure 3 for Figure 1 Front view of the valve disc in place.

[0039] Figure 4 for Figure 3AA sectional view of the valve plate in position on the seat shown in FIG.

[0040] Description of reference numerals:

[0041] 1. Cylinder; 2. Valve; 3. First main air circuit; 4. Second main air circuit; 5. Shell; 6. Piston; 7. Pneumatic rod; 8. Buffer valve; 9. Air source; 10. Second one-way speed regulating valve; 11. Third one-way speed regulating valve; 12. Two-position five-way solenoid valve; 13. Drive frame; 14. Valve plate; 15. First one-way speed regulating valve; 16. Solenoid valve; 17. Muffler; 18. Magnetic switch; 19. First buffer structure; 20. Second buffer structure; 21. Limit buffer block; 22. Buffer body; 23. Position wheel; 24. Valve plate position seat; 25. Position block; 26. First buffer pad; 27. Second buffer pad; 28. Third buffer pad. DETAILED DESCRIPTION

[0042] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0044] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0046] This embodiment provides a specific implementation of a pneumatic valve damping and shock absorption system, such as Figure 1 As shown, it includes: a cylinder 1, a valve 2, a first main air circuit 3, a second main air circuit 4 and a buffer circuit. The cylinder 1 has a piston 6 and a pneumatic rod 7 connected to the piston 6, and one end of the pneumatic rod 7 extends toward the valve 2. The cylinder 1 adopts a speed regulating cylinder 1 with buffer valves 8 at both ends, and the running speed of the piston 6 can be adjusted within a suitable range through the buffer valves 8 at both ends. Vents for connecting to an air source 9 are respectively provided at both ends of the cylinder 1. When the pneumatic rod 7 is driven forward, one of the two vents is an air inlet and the other is an air outlet, wherein the air inlet is connected to the first main air circuit 3, and the air outlet is connected to the second main air circuit 4. Both the first main gas circuit 3 and the second main gas circuit 4 are provided with one-way speed regulating valves, wherein the first main gas circuit 3 is provided with a second one-way speed regulating valve 10, and the second main gas circuit 4 is provided with a third one-way speed regulating valve 11. The above two one-way speed regulating valves are used to adjust the exhaust speed on the first main gas circuit 3 and the second main gas circuit 4 respectively.

[0047] like Figure 1 As shown, the inlet ends of the first main gas path 3 and the second main gas path 4 away from the cylinder are respectively adapted to be connected to the gas source 9 and the buffer circuit through a two-position five-way solenoid valve 12. When the first main gas path 3 is connected to the gas source 9, the second main gas path 4 is connected to the buffer circuit; when the second main gas path 4 is connected to the gas source 9, the first main gas path 3 is connected to the outside. In addition, as an alternative embodiment, when the second main gas path 4 is connected to the gas source 9, the first main gas path 3 can also be connected to the buffer circuit.

[0048] like Figure 1 As shown, the buffer circuit includes: a first regulating branch and a second regulating branch arranged in parallel, a first one-way speed regulating valve 15 is arranged on the first regulating branch, and a solenoid valve 16 is arranged on the second regulating branch. The first one-way speed regulating valve 15 is used to adjust the exhaust speed on the first regulating branch, and the speed adjusted by the first one-way speed regulating valve 15 is further reduced on the basis of the speed adjusted by the second one-way speed regulating valve 10 and the third one-way speed regulating valve 11. The speed adjustment size of the first one-way speed regulating valve 15, the second one-way speed regulating valve 10 and the third one-way speed regulating valve 11 is adjustable. The solenoid valve 16 is used to cut off or conduct the second regulating branch. In addition, silencers 17 are respectively arranged at the outlets of the first regulating branch and the second regulating branch.

[0049] like Figure 1As shown, a magnetic switch 18 is provided on the cylinder 1 near the air outlet, and the magnetic switch 18 is connected to the controller, and the controller is electrically connected to the solenoid valve 16. That is, when the piston 6 in the cylinder 1 moves downward to near the magnetic switch 18, the controller receives a signal, and at this time the controller controls the solenoid valve 16 to close, so that the exhaust of the cylinder 1 is switched from the second regulating branch to the first regulating branch, thereby increasing the exhaust pressure of the cylinder 1 and buffering the piston 6 in the cylinder 1.

[0050] like Figure 1 As shown, the valve 2 includes: a housing 5, a drive frame 13 and a valve plate 14, wherein the housing 5 is arranged opposite to the cylinder 1, the drive frame 13 is slidably arranged inside the housing 5, the drive frame 13 is connected to the pneumatic rod 7 of the cylinder 1, and a first buffer structure 19 is provided between the drive frame 13 and the housing 5. The first buffer structure 19 includes: a drive frame positioning device and a limit buffer block 21, the drive frame positioning device is elastically arranged on the drive frame 13, and the limit buffer block 21 is arranged on the housing 5. In addition, as Figure 2 As shown, a buffer body 22 is provided on the limit buffer block 21 in the direction toward the driving frame positioning device.

[0051] like Figure 1 As shown, the valve plate 14 is slidably disposed in the housing 5, the valve plate 14 and the driving frame 13 are rotatably connected via a connecting rod, and a second buffer structure 20 is provided between the valve plate 14 and the housing 5. The second buffer structure 20 includes: a valve plate seat 24 disposed on the valve plate 14, as shown in FIG. Figure 3 As shown, the valve plate positioning seat 24 includes: a positioning wheel 23 and positioning blocks 25 arranged on both sides of the positioning wheel 23. The positioning wheel 23 is rotatably arranged on the valve plate positioning seat 24, and the installation space of the positioning wheel 23 is formed between the two positioning blocks 25.

[0052] like Figure 4 As shown, the positioning block 25 has a buffer pad facing the housing, and the buffer pad has a first buffer pad 26, a second buffer pad 27 and a third buffer pad 28 arranged in sequence. The first buffer pad 26 is located at the bottom layer, and the first buffer pad 26 is a double-layered rubber material; the second buffer pad 27 is located at the upper layer of the first buffer pad 26, and the second buffer pad 27 is a double-layered polyurethane material; the third buffer pad 28 is located at the upper layer of the second buffer pad 27, and the third buffer pad 28 is a single-layered polytetrafluoroethylene material.

[0053] How to use

[0054] like Figure 1 As shown, the cylinder 1 drives the valve plate 14 toward Figure 1When moving in the downward direction shown in , first, the two-position five-way solenoid valve 12 is actuated to connect the first main gas path 3 with the gas source 9 and to connect the second main gas path 4 with the buffer circuit.

[0055] The air source 9 takes in air from above the piston 6 in the cylinder 1 through the first main air path 3, and the piston 6 drives the pneumatic rod 7 to move downward, and the pneumatic rod 7 drives the driving frame 13 and the valve plate 14 of the valve 2 to move downward; at the same time, the gas in the cavity below the piston 6 in the cylinder 1 is discharged toward the second main air path 4. On the second main air path 4, the exhaust gas in the cylinder 1 first passes through the third one-way speed regulating valve 11 for speed regulation, and then passes through the two-position five-way solenoid valve 12 and the solenoid valve 16 in sequence, and is discharged to the outside from the second regulating branch through the muffler 17.

[0056] When the piston 6 of the cylinder 1 moves to the magnetic switch 18, the controller receives the signal of the magnetic switch 18, and sends a control signal to the solenoid valve 16 to close the solenoid valve 16. At this time, the exhaust gas in the cylinder 1 cannot be discharged from the second regulating branch, but can only be discharged from the first regulating branch, and the first one-way speed regulating valve 15 is provided on the first regulating branch. The exhaust gas is further regulated by the first one-way speed regulating valve 15, so that the exhaust speed of the cylinder 1 can be further reduced.

[0057] When the drive frame 13 moves into position, the first buffer structure 19 on the shell 5 takes effect. Specifically, when the drive frame positioning device contacts the limit buffer block 21, part of the aerodynamic force is offset by the drive frame positioning device, so that the drive frame 13 is positioned in place without impact.

[0058] In this embodiment, the valve plate 14 needs to move in a vertical direction before the driving frame 13 moves downward and is about to be in place, that is, the valve plate 14 moves in a direction perpendicular to the moving direction of the driving frame 13. In this process, the second buffer structure 20 on the valve plate 14 acts, specifically, firstly, the positioning block 25 on the valve plate 14 contacts with the housing 5, and the valve plate 14 is smoothly in place through the buffer pad on the positioning block 25, and then the positioning wheel 23 contacts with the housing, and then the valve plate 14 is driven by the connecting rod to move in a vertical direction under the action of the driving frame 13.

[0059] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. However, the obvious changes or modifications derived therefrom are still within the scope of protection of the present invention.

Claims

1. A pneumatic valve damping and shock absorption system, characterized in that: include: A cylinder (1) having a piston (6) and a pneumatic rod (7) connected to the piston (6) therein, wherein one end of the pneumatic rod (7) extends outward; A valve (2) having a drive frame (13) connected to the pneumatic rod (7) of the cylinder (1) and a valve plate (14) connected to the drive frame (13); a buffer circuit, connected to at least one vent of the cylinder (1), the buffer circuit comprising: a first regulating branch and a second regulating branch arranged in parallel, the first regulating branch being provided with a first one-way speed regulating valve (15), and the second regulating branch being provided with a solenoid valve (16); The valve (2) comprises: A housing (5) is arranged opposite to the cylinder (1); A driving frame (13) is slidably disposed in the housing (5), connected to the pneumatic rod (7) of the cylinder (1), and has a first buffer structure (19) between the driving frame and the housing (5); The valve plate (14) is slidably disposed in the housing (5), is rotatably connected to the driving frame (13) via a connecting rod, and has a second buffer structure (20) between the valve plate and the housing (5).

2. The pneumatic valve damping and shock absorption system according to claim 1, characterized in that: Also includes: A first main gas path (3), one end of which is in communication with a vent of the cylinder (1), and the other end of which is suitable for being in communication with a gas source (9), a second one-way speed regulating valve (10) is provided on the first main gas path (3), and a speed of adjustment of the second one-way speed regulating valve (10) is greater than a speed of adjustment of the first one-way speed regulating valve (15); A second main gas path (4), one end of which is in communication with another vent of the cylinder (1), and the other end of which is suitable for being in communication with a gas source (9); a third one-way speed regulating valve (11) is provided on the second main gas path (4); the speed of adjustment of the third one-way speed regulating valve (11) is greater than the speed of adjustment of the first one-way speed regulating valve (15); The buffer circuit is suitable for being connected to at least one of the first main gas circuit (3) and the second main gas circuit (4) via a two-position five-way solenoid valve (12).

3. The pneumatic valve damping and shock absorption system according to claim 2, characterized in that: When the pneumatic rod (7) of the cylinder (1) is driven forward, one of the two air vents of the cylinder (1) is an air inlet and the other is an air outlet; The first main air path (3) is in communication with the air inlet, the second main air path (4) is in communication with the air outlet, and the buffer circuit is adapted to be in communication with at least the second main air path (4) via a two-position five-way solenoid valve (12).

4. The pneumatic valve damping and shock absorption system according to claim 3, characterized in that: A magnetic switch (18) is provided on the cylinder (1) at a position close to the air outlet; the magnetic switch (18) is connected to a controller, and the controller is electrically connected to the solenoid valve (16).

5. The pneumatic valve damping and shock absorption system according to any one of claims 1 to 4, characterized in that: The first buffer structure (19) comprises: A drive frame positioning device, arranged on the drive frame (13); A limit buffer block (21) is arranged on the housing (5) and has a buffer body (22) facing the drive frame positioning device.

6. The pneumatic valve damping and shock absorption system according to any one of claims 1 to 4, characterized in that: The second buffer structure (20) comprises: The valve plate positioning seat (24) is arranged on the valve plate (14) and comprises a positioning block (25) and a positioning wheel (23) arranged in parallel facing the housing (5), and a buffer pad is protrudingly arranged on the positioning block (25).

7. The pneumatic valve damping and shock absorption system according to claim 6, characterized in that: The positioning blocks (25) have two groups, which are respectively arranged on both sides of the positioning wheel (23).

8. The pneumatic valve damping and shock absorption system according to claim 6, characterized in that: The buffer pad has at least five layers, which are respectively made of rubber material, polyurethane material and polytetrafluoroethylene material.

9. The pneumatic valve damping and shock absorption system according to claim 8, characterized in that: The buffer pad comprises: A first buffer pad (26), located at the bottom layer, is a rubber material having at least two layers; A second buffer pad (27), located on an upper layer of the first buffer pad (26), is a polyurethane material having at least two layers; The third buffer pad (28) is located on the upper layer of the second buffer pad (27) and is a single-layer polytetrafluoroethylene material.

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