CN217153219U - Pneumatic actuator control assembly - Google Patents

Abstract

The utility model provides a pneumatic actuator control assembly, include: the exhaust device is connected with the actuator in a matching way; the actuator includes: the device comprises a shifting fork box body, a first pneumatic control assembly, an actuator cylinder piston, an actuator connecting rod, a first cylinder body and an exhaust hole; the first cylinder body is fixedly arranged on one side of the shifting fork box body, and the first pneumatic control component is fixedly arranged on the other side of the shifting fork box body; the actuator connecting rod penetrates through the shifting fork box body and is arranged in the first pneumatic control component in an extending mode; the actuator cylinder piston is connected with the first end of the actuator connecting rod, the first pneumatic control assembly is connected with the second end of the actuator connecting rod, and the exhaust hole is arranged close to the first end of the actuator connecting rod; the exhaust device is connected with the first cylinder body and communicated with the exhaust hole. The technical scheme of the utility model, can realize exhausting fast in the short time, satisfy the purpose of opening fast or closing the valve, and this structural installation is simple.

Description

Pneumatic actuator control assembly

Technical Field

The utility model relates to an executor technical field, in particular to pneumatic actuator control assembly.

Background

The single cylinder piston type shifting fork actuator is a piston type actuating mechanism, and is suitable for switching off or metering control of a 90-degree corner valve. The single-cylinder piston type shifting fork actuator is started by driving a piston compression spring by air source pressure, and the spring pushes the piston to reset after air pressure is lost, so that reciprocating switch motion is completed, and reciprocating motion is converted into rotary motion to output torque force through a shifting fork mechanical structure.

The common single-cylinder piston type shifting fork actuator at present is: after the pressure of the air source is connected, the connecting rod pulls the piston of the spring cylinder to compress the spring. This results in the air supply connection of the air cylinder being open only on the side close to the fork housing. Because the space of the side wall of the cylinder is occupied by the shifting fork box body, the opening area of the interface is limited and accessories are not convenient to install.

In many industrial applications, valve opening or closing times of 3 seconds or less are required. In this case, the above-mentioned single-cylinder piston type shifting fork actuator structure is difficult to meet or needs to meet the requirements by installing more complicated accessories. The control cost, the assembly and debugging and the stable operation of the product are all unfavorable.

SUMMERY OF THE UTILITY MODEL

An embodiment of the utility model provides a pneumatic actuator control assembly to the complexity of single cylinder piston type shift fork executor structure among the solution prior art, and the requirement of opening or closing the valve rapidly, the purpose of automatic opening or self-closing valve when also can combine the solenoid valve to realize the outage simultaneously.

In order to solve the technical problem, an embodiment of the utility model provides a pneumatic actuator control assembly, include: the exhaust device is matched and connected with the actuator;

the actuator includes: the device comprises a shifting fork box body, a first pneumatic control assembly, an actuator cylinder piston, an actuator connecting rod, a first cylinder body and an exhaust hole;

the first cylinder body is fixedly arranged on one side of the shifting fork box body, and the first pneumatic control component is fixedly arranged on the other side of the shifting fork box body;

the actuator connecting rod penetrates through the shifting fork box body and is arranged in the first pneumatic control component in an extending mode;

the actuator cylinder piston is connected with the first end of the actuator connecting rod, the first pneumatic control assembly is connected with the second end of the actuator connecting rod, and the exhaust hole is arranged close to the first end of the actuator connecting rod;

the exhaust device is connected with the first cylinder body and communicated with the exhaust hole.

Optionally, the actuator further includes:

the air inlet hole, the air inlet hole with the exhaust hole all sets up on keeping away from the cylinder wall of shift fork box.

Optionally, the actuator further includes:

and the buffer short shaft is connected with the first end of the actuator connecting rod.

Optionally, one end of the buffer short shaft close to the exhaust hole is bullet-shaped or conical.

Optionally, the exhaust apparatus includes:

the exhaust device comprises an exhaust device shell, an exhaust device piston, a return spring and an exhaust device bottom plate;

the exhaust device bottom plate is respectively connected with the actuator and the exhaust device shell and is arranged at a position close to the exhaust hole;

the exhaust device piston is communicated with the exhaust hole and is arranged between the exhaust hole and the return spring;

the reset spring is arranged between the exhaust device shell and the exhaust device piston, the exhaust device piston is sleeved in the exhaust device shell, and the exhaust device piston is connected with the exhaust device shell in a sliding mode;

the exhaust device piston can be switched between a first position and a second position in a sliding mode through preset gas pressure and the preset elastic force of the return spring.

Optionally, the exhaust housing comprises:

a filter screen;

the filter screen is arranged around the exhaust device piston and is positioned between the exhaust device shell and the exhaust device bottom plate. Optionally, the exhaust apparatus further comprises:

an exhaust cylinder having an air supply interface;

the exhaust cylinder is disposed between the exhaust piston and the exhaust housing;

the air source interface and the air inlet of the actuator are connected with the same air source.

Optionally, the exhaust device piston is provided with a groove;

the exhaust apparatus further includes: a limit bolt;

the limiting bolt is fixedly arranged on the first side wall of the exhaust device shell;

one end of the reset spring is sleeved on the limiting bolt, the other end of the reset spring is abutted against the groove, and the reset spring can be telescopically switched between the first position and the second position;

wherein the return spring is in the first position when in a first compressed state and the return spring is in the second position when in a second compressed state.

Optionally, the exhaust apparatus further comprises:

a first seal ring disposed between the actuator and the exhaust bottom plate;

a second seal ring disposed between the exhaust device piston and the exhaust device bottom plate;

a third seal ring disposed between the exhaust piston and the exhaust housing.

The utility model has the advantages that:

among the above-mentioned technical scheme, the utility model discloses a will the exhaust hole is close to the first end setting of executor connecting rod, and exhaust apparatus with first cylinder body connect and with exhaust hole intercommunication to exhaust fast in can realizing the short time, satisfy the purpose of opening or closing the valve fast, and this structrual installation is simple, and exhaust speed conveniently adjusts, low in manufacturing cost.

Drawings

Fig. 1 is a schematic structural diagram of an actuator according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a pneumatic actuator control assembly according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of an exhaust device according to an embodiment of the present invention;

fig. 4 shows a second schematic structural diagram of an exhaust device according to an embodiment of the present invention.

Description of reference numerals:

1-an actuator; 101-a shifting fork box body; 102-a first pneumatic control assembly; 103-actuator cylinder piston; 104-an actuator linkage; 105-a first cylinder; 106-vent hole; 107-air inlet holes; 108-buffer minor axis; 2-an exhaust device; 201-exhaust enclosure; 202-an exhaust piston; 203-a filter screen; 204-an exhaust cylinder; 205-gas source interface; 206-limit bolt; 207-a return spring; 208-exhaust bottom plate; 209-first sealing ring; 210-a second seal ring; 211-third sealing ring.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

The utility model discloses to the complexity of single cylinder piston type shift fork executor structure among the prior art to and the problem that the valve was opened or was closed for a long time, provide a pneumatic actuator control assembly.

As shown in fig. 1 to 4, an alternative embodiment of the present invention provides a pneumatic actuator control assembly, comprising: the device comprises an actuator 1 and an exhaust device 2 which is matched and connected with the actuator 1;

the actuator 1 includes: the device comprises a shifting fork box body 101, a first pneumatic control component 102, an actuator cylinder piston 103, an actuator connecting rod 104, a first cylinder body 105 and an exhaust hole 106;

the first cylinder 105 is fixedly arranged on one side of the fork box body 101, and the first pneumatic control assembly 102 is fixedly arranged on the other side of the fork box body 101;

the actuator connecting rod 104 penetrates through the shifting fork box body 101 and extends into the first pneumatic control assembly 102;

the actuator cylinder piston 103 is coupled to a first end of the actuator linkage 104, the first pneumatic control assembly 102 is coupled to a second end of the actuator linkage 104, and the exhaust port 106 is disposed proximate the first end of the actuator linkage 104;

the exhaust device 2 is connected to the first cylinder 105 and communicates with the exhaust hole 106.

In this embodiment, the first pneumatic control assembly 102 is preferably a spring cylinder, the actuator cylinder piston 103 is initially located at a position close to the cylinder wall of the first cylinder 105 in the fork housing 101, and the spring cylinder is in a compressed state, when the actuator 1 starts to move, the spring cylinder moves in a first direction (the direction indicated by the arrow of the actuator connecting rod 104 in fig. 1 is the first direction), so as to drive the actuator cylinder piston 103 to move towards the cylinder wall of the first cylinder 105 away from the fork housing 101, that is, both the first pneumatic control assembly 102 and the actuator cylinder piston 103 move in the first direction, thereby achieving the purpose of exhausting air to the exhaust hole 106.

Specifically, the actuator 1 further includes:

and the air inlet hole 107, the air inlet hole 107 and the air outlet hole 106 are arranged on the cylinder wall far away from the shifting fork box body 101.

Compared with the prior art, the relative position of spring and executor cylinder piston has been revised to this application, becomes connecting rod promotion spring cylinder piston compression spring by preceding connecting rod pulling spring cylinder piston compression spring, and the benefit of this kind of structure can make the air supply trompil of first cylinder body 105 is adjusted to the one side of keeping away from the shift fork box by the one side that is close to shift fork box 101 originally to obtain sufficient trompil space and installation annex space.

Optionally, the actuator 1 further includes:

a buffer stub shaft 108, the buffer stub shaft 108 connected to a first end of the actuator link 104.

In this embodiment, in order to prevent the actuator cylinder piston 103 from colliding with the cylinder wall of the first cylinder 105 far from the fork case 101 during rapid exhaust, a protruding buffer stub shaft 108 is added between the actuator cylinder piston 103 and the cylinder wall of the first cylinder 105 far from the fork case 101. The buffer stub shaft 108 is integrally connected to the first end of the actuator link 104, and when the actuator link 104 approaches to a cylinder wall of the first cylinder 105 away from the shift fork housing 101, the buffer stub shaft 108 extends into the exhaust hole 106, thereby reducing an exhaust area in a short time.

Specifically, one end of the buffer short shaft 108 close to the exhaust hole 106 is bullet-shaped or conical. Therefore, the exhaust resistance can be ensured to rise in a short time, and the aim of buffering and collision avoidance is fulfilled.

Optionally, the exhaust device 2 comprises:

an exhaust housing 201, an exhaust piston 202, a return spring 207, and an exhaust bottom plate 208;

the exhaust device bottom plate 208 is connected to the actuator 1 and the exhaust device housing 201, respectively, and is disposed near the exhaust hole 106;

the exhaust piston 202 is in communication with the exhaust hole 106, and the exhaust piston 202 is disposed between the exhaust hole 106 and the return spring 207;

the return spring 207 is arranged between the exhaust device housing 201 and the exhaust device piston 202, the exhaust device piston 202 is sleeved in the exhaust device housing 201, and the exhaust device piston 202 is slidably connected with the exhaust device housing 201;

wherein, the exhaust piston 202 can be switched between the first position and the second position by the preset gas pressure and the preset elastic force of the return spring 207.

In this embodiment, the exhaust device 2 is installed at the end cap position of the first cylinder 105 of the actuator 1, and communicates with the exhaust hole 106 mentioned above. In operation, it is necessary to connect itself to a source of air at the same pressure as the first cylinder 105 of the actuator 1. The exhaust valve is opened or closed quickly by controlling the preset gas pressure and combining the elastic force action of the return spring 207, so that the gas in the first cylinder 105 of the actuator 1 is discharged quickly, and the purpose of opening or closing the valve quickly is achieved.

Optionally, the exhaust device housing 201 comprises:

a filter screen 203;

the filter mesh 203 is disposed around the exhaust piston 202 and between the exhaust housing 201 and the exhaust bottom plate 208.

It should be understood that the filter net 203 is installed between the exhaust device bottom plate 208 and the exhaust device housing 201, and is disposed around the exhaust device piston 202 for one circle, and plays roles of protecting the exhaust device piston 202, blocking foreign substances, and reducing noise while discharging gas.

Optionally, the exhaust apparatus 2 further includes:

a degassing cylinder 204 having an air supply interface 205;

the exhaust cylinder 204 is disposed between the exhaust piston 202 and the exhaust housing 201;

the air source interface 205 and the air inlet 107 of the actuator 1 are connected with the same air source.

Here, the above-mentioned exhaust piston 202 is simultaneously acted upon by the preset gas pressure of the exhaust hole 106 and the gas supply port 205.

Optionally, the exhaust piston 202 is provided with a groove;

the exhaust apparatus 2 further includes: a limit bolt 206;

the limiting bolt 206 is fixedly arranged on a first side wall of the exhaust device shell 201;

one end of the return spring 207 is sleeved on the limiting bolt 206, and the other end of the return spring abuts against the groove and can be telescopically switched between the first position and the second position;

wherein the return spring 207 is in the first position when in a first compressed state and the return spring 207 is in the second position when in a second compressed state.

It should be noted that, as mentioned above, the exhaust piston 202 is slidably switched between the first position and the second position by the preset gas pressure and the preset elastic force of the return spring 207, and since the exhaust piston 202 is connected to the return spring 207, the exhaust piston 202 is slidably switched between the first position and the second position, and it can be understood that the exhaust piston 202 is slid to switch the return spring 207 between the first compression state and the second compression state.

In this embodiment, the return spring 207 is in a first compressed state after the exhaust device 2 and the actuator 1 are mounted, i.e. in an initial state after mounting, the initial state spring is also somewhat compressed, and when the return spring 207 is compressed in the first direction, the return spring 207 is further compressed, thereby forming a second position in a second compressed state.

Optionally, the exhaust apparatus 2 further includes:

a first seal ring 209, the first seal ring 209 being provided between the actuator 1 and the exhaust device bottom plate 208;

a second seal 210, the second seal 210 disposed between the vent piston 202 and the vent plate 208;

a third sealing ring 211, the third sealing ring 211 being arranged between the vent piston 202 and the vent housing 201.

In this embodiment, the first seal ring 209, the second seal ring 210, and the third seal ring 211 cooperate to ensure the sealing performance of the exhaust device 2 for the leakage of the entire exhaust device 2. The first seal ring 209, the second seal ring 210, and the third seal ring 211 are all of an annular structure.

With respect to the specific structure of the above-mentioned exhaust device 2, the operation principle thereof will be described in detail with reference to the close schematic diagram of the exhaust device 2 in fig. 3 and the open schematic diagram of the exhaust device 2 in fig. 4.

In fig. 3, the exhaust device 2 is in a closed state:

referring to fig. 1 and 3, the air inlet 107 of the actuator 1 and the air source interface 205 of the exhaust device 2 are connected to an air source with the same pressure, which is P. The left side of the exhaust piston 202 is communicated with the first cylinder 105, the right side is the exhaust cylinder 204, the effective areas of the gas on the two sides of the exhaust piston 202 are respectively S1 and S2, wherein S1 is the gas acting surface of the first cylinder 105, and S2 is the gas acting surface of the exhaust cylinder 204. The corresponding forces generated are F1 ═ P × S1 and F1 ═ P × S2, respectively.

S1 is slightly smaller than S2 in structural design, so F1 < F2. In addition, a return spring 207 is mounted to the right side of the exhaust piston 202. The return spring 207 is compressed after the exhaust device 2 and the actuator 1 are mounted, and generates a thrust force F3 acting on the S2 surface. Therefore, when the gas source always supplies gas with pressure P, it can be ensured that F1 < (F2+ F3) always holds. Thus, the piston 202 of the exhaust device can be pressed against the sealing surface all the time without cutting off the gas source of the exhaust device 2, so that the sealing is maintained and the gas in the first cylinder 105 does not leak.

In fig. 4, the open state of the exhaust apparatus 2:

as shown in fig. 1 and 4, when the actuator 1 is to perform a quick action, it is necessary to quickly discharge the gas in the first cylinder 105. At this time, the gas source of the exhaust device 2 is cut off, and the gas in the exhaust cylinder 204 of the exhaust device 2 is discharged rapidly. Since the degassing cylinder 204 is small compared to the first block 105, the amount of stored gas is small and the discharge process can be fast. At this point, the first block 105 pressure is still P and the degassing cylinder 204 pressure becomes a standard atmospheric pressure P0. The force acting on the left side of the exhaust piston 202 is F1 ═ P × S1, and the force acting on the right side of the exhaust piston 202 is a spring thrust F3 and a standard atmospheric pressure F4 ═ P0 ═ S2, where S1 is a gas acting surface of the first cylinder 105 and S2 is a gas acting surface of the exhaust cylinder 204. Since F1 is much larger than (F3+ F4), the exhaust piston 202 is pushed away rapidly and the gas in the first cylinder 105 begins to discharge. The extreme open position of the exhaust piston 202 may be adjusted by a limit bolt 206 to control the maximum exhaust area of the exhaust 2. The purpose of controlling the exhaust time is achieved.

As the gas in the first cylinder 105 is exhausted, the pressure P in the first cylinder 105 is gradually reduced, and the force F1 applied to the left side of the exhaust piston 202 is gradually reduced until the force is less than (F3+ F4), and the exhaust piston 202 is pushed back to the closed position, and the exhaust of the first cylinder 105 is finished. The actuator action is also completed.

To sum up, the utility model discloses a scheme has adopted the single cylinder piston shift fork executor with prior art different structures and is equipped with the exhaust apparatus who is specially for this kind of executor structural design (see fig. 2). The rapid exhaust within 1 to 3 seconds can be realized finally, so that the aim of rapidly opening or closing the valve is fulfilled; meanwhile, the structure is simple to install, stable in operation, attractive in appearance and capable of adjusting the exhaust speed.

The foregoing is directed to the preferred embodiments of the present invention, and it will be understood by those skilled in the art that various changes and modifications may be made without departing from the principles of the invention, and that such changes and modifications are intended to be included within the scope of the invention.

Claims (9)

1. A pneumatic actuator control assembly, comprising: the device comprises an actuator (1) and an exhaust device (2) which is matched and connected with the actuator (1);

the actuator (1) comprises: the device comprises a shifting fork box body (101), a first pneumatic control assembly (102), an actuator cylinder piston (103), an actuator connecting rod (104), a first cylinder body (105) and an exhaust hole (106);

the first cylinder body (105) is fixedly arranged on one side of the shifting fork box body (101), and the first pneumatic control assembly (102) is fixedly arranged on the other side of the shifting fork box body (101);

the actuator connecting rod (104) penetrates through the shifting fork box body (101) and extends into the first pneumatic control assembly (102);

the actuator cylinder piston (103) is connected with a first end of the actuator connecting rod (104), the first pneumatic control assembly (102) is connected with a second end of the actuator connecting rod (104), and the exhaust hole (106) is arranged close to the first end of the actuator connecting rod (104);

the exhaust device (2) is connected to the first cylinder (105) and communicates with the exhaust hole (106).

2. The pneumatic actuator control assembly according to claim 1, wherein the actuator (1) further comprises:

and the air inlet hole (107), the air inlet hole (107) and the air outlet hole (106) are both arranged on the wall of the air cylinder far away from the shifting fork box body (101).

3. The pneumatic actuator control assembly according to claim 1, wherein the actuator (1) further comprises:

a buffer stub shaft (108), the buffer stub shaft (108) connected to a first end of the actuator link (104).

4. A pneumatic actuator control assembly according to claim 3, wherein the end of the buffer stub (108) adjacent the vent (106) is bullet or conical.

5. The pneumatic actuator control assembly according to claim 1, wherein the exhaust device (2) includes:

an exhaust device shell (201), an exhaust device piston (202), a return spring (207) and an exhaust device bottom plate (208);

the exhaust device bottom plate (208) is respectively connected with the actuator (1) and the exhaust device shell (201) and is arranged at a position close to the exhaust hole (106);

the exhaust piston (202) is in communication with the exhaust orifice (106), and the exhaust piston (202) is disposed between the exhaust orifice (106) and the return spring (207);

the return spring (207) is arranged between the exhaust device shell (201) and the exhaust device piston (202), the exhaust device piston (202) is sleeved in the exhaust device shell (201), and the exhaust device piston (202) is connected with the exhaust device shell (201) in a sliding mode;

wherein the exhaust device piston (202) can be switched between a first position and a second position in a sliding manner by a preset gas pressure and a preset elastic force of the return spring (207).

6. The pneumatic actuator control assembly of claim 5, wherein the exhaust enclosure (201) comprises:

a filter screen (203);

the filter screen (203) is disposed around the exhaust piston (202) and between the exhaust housing (201) and the exhaust base plate (208).

7. The pneumatic actuator control assembly of claim 6, wherein the exhaust device (2) further comprises:

a degassing cylinder (204) having an air supply interface (205);

the exhaust cylinder (204) is disposed between the exhaust piston (202) and the exhaust housing (201);

the air source interface (205) and the air inlet (107) of the actuator (1) are connected with the same air source.

8. The pneumatic actuator control assembly of claim 7, wherein the vent piston (202) is provided with a recess;

the exhaust apparatus (2) further includes: a limit bolt (206);

the limiting bolt (206) is fixedly arranged on a first side wall of the exhaust device shell (201);

one end of the reset spring (207) is sleeved on the limiting bolt (206), the other end of the reset spring is abutted against the groove, and the reset spring can be telescopically switched between the first position and the second position;

wherein the return spring (207) is in the first position when in a first compressed state and the return spring (207) is in the second position when in a second compressed state.

9. The pneumatic actuator control assembly of claim 5, wherein the exhaust device (2) further comprises:

a first sealing ring (209), the first sealing ring (209) being disposed between the actuator (1) and the exhaust device base plate (208);

a second seal ring (210), the second seal ring (210) disposed between the exhaust piston (202) and the exhaust base plate (208);

a third seal ring (211), the third seal ring (211) being disposed between the exhaust device piston (202) and the exhaust device housing (201).

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