CN219933120U

CN219933120U - Pneumatic actuator with protection structure

Info

Publication number: CN219933120U
Application number: CN202320791470.9U
Authority: CN
Inventors: 单栋冬
Original assignee: Wuxi Shengboai Hydraulic Pneumatic Co ltd
Current assignee: Wuxi Shengboai Hydraulic Pneumatic Co ltd
Priority date: 2023-04-11
Filing date: 2023-04-11
Publication date: 2023-10-31
Anticipated expiration: 2033-04-11

Abstract

The utility model discloses a pneumatic actuator with a protective structure, which comprises a cylinder body, a cylinder cover and a piston, wherein a driving shaft is arranged in the cylinder body, the surface of the driving shaft is sleeved with a toothed ring, the surface of the piston is fixedly connected with a rack meshed with the toothed ring, the surface of the cylinder cover is provided with an exhaust pipe and a valve shell, the surface of the valve shell is provided with two groups of joints communicated with the exhaust pipe, a sealing block is arranged in the valve shell, a top spring is arranged between the valve shell and the sealing block, a limiting column is arranged on the surface of the sealing block, when the limiting column is pushed to move by the piston, the limiting column drives the sealing block to seal the valve shell, so that a cavity between the cylinder cover and the piston is in a sealing state, the piston is buffered by utilizing air, the piston is prevented from touching the cylinder cover, the piston, the cylinder cover and the spring are further protected, the service life of the cylinder is prolonged, vibration caused in the moving process of the piston is prevented, the structure of the pneumatic actuator is more stable, and the sealing performance is not easy to be damaged, and the pneumatic actuator is safe and reliable to use.

Description

Pneumatic actuator with protection structure

Technical Field

The utility model relates to the technical field of pneumatic actuators, in particular to a pneumatic actuator with a protection structure.

Background

The pneumatic actuator is an actuating device for driving the opening and closing or adjusting valve by high-pressure gas, and is also called a pneumatic actuating mechanism or a pneumatic device. In industrial process automation control systems, the response speed of the pipeline valve is required to be high. When the valve is required to act, the valve can be opened and closed quickly, so that the special requirements of working conditions are met. The pneumatic actuator for controlling the valve can meet the corresponding technical requirements, and has the functions of quick opening and quick closing. However, with the acceleration of valve opening and closing speed, the severe collision is easy to generate, the impact to the valve seat, the valve core, the valve rod, the sealing element and other parts of the valve is obvious, the service life and the reliability of the valve and the pneumatic actuator are seriously influenced, the reliable buffer protection effect is difficult to be achieved by only relying on the spring in the pneumatic actuator, the stability of the pneumatic actuator is insufficient, and the pneumatic actuator is easy to generate the problem of air leakage after long-term use.

Disclosure of Invention

The present utility model is directed to a pneumatic actuator with a protection structure, so as to solve the above-mentioned problems in the prior art.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a pneumatic actuator with protective structure, includes cylinder body and cylinder cap and piston, cylinder body internally mounted has the drive shaft, and the drive shaft rotates with the cylinder body to be connected, the ring gear has been cup jointed on the drive shaft surface, piston fixedly connected with and the rack of ring gear meshing, the cylinder cap be sunken form, cylinder cap surface mounting has blast pipe and valve casing, the valve casing surface is equipped with two sets of joints with the blast pipe intercommunication, and the blast pipe inserts inside a set of joint, and the blast pipe other end runs through the cylinder cap, the valve casing is inside to be equipped with the shutoff piece, and is equipped with the top spring between valve casing and the shutoff piece, the shutoff piece surface is equipped with spacing post, and spacing post passes the valve casing and extends into inside the cylinder body.

Further, the filter plate covered on the surface of the valve shell is inserted on the surface of the cylinder cover, the fixing bolt screwed with the cylinder body is inserted on the edge of the surface of the cylinder cover, and the cylinder body is provided with a screw hole matched with the fixing bolt.

Furthermore, the spring is arranged on the inner surface of the cylinder cover, the other end of the spring abuts against the surface of the corresponding piston, and in an initial state, the spring moves the two groups of pistons to be close to each other.

Furthermore, the lower end of the driving shaft penetrates through the cylinder body, the lower end of the driving shaft is provided with an assembly head, and the assembly head is U-shaped and can be connected with a screwing shaft of the valve.

Further, the cylinder body surface is equipped with the mount pad, and the mount pad edge is equipped with the screw hole, the mount pad surface be equipped with the inside cavity intercommunication of cylinder body two sets of through-holes.

Further, two sets of connect symmetric distribution at the valve casing surface, valve casing and shutoff piece are the rectangle setting, shutoff piece surface is equipped with the recess, the top spring inserts inside the recess, and the top spring promotes the shutoff piece for the valve casing defaults to the state of ventilating.

Compared with the prior art, the utility model has the beneficial effects that: according to the utility model, high-pressure air is introduced into the cylinder body through the through hole, the piston is pushed to translate by air, the piston controls the driving shaft to rotate through the rack to drive the automatic opening and closing of the empty box switch through the assembly head, when the piston pushes the limit column to move, the limit column drives the blocking block to block the valve shell, so that a cavity between the cylinder cover and the piston is in a sealed state, the air is utilized to buffer the piston, the piston is prevented from touching the cylinder cover, the piston can be further protected, the cylinder cover and the spring are further prevented, the service life of the cylinder is prolonged, vibration caused in the moving process of the piston is prevented, the structure of the pneumatic actuator is more stable, the tightness is not easy to break, and the pneumatic actuator is safe and reliable to use.

Drawings

FIG. 1 is a schematic diagram of the connection of a cylinder and a mounting base;

FIG. 2 is a cross-sectional view of the present utility model;

fig. 3 is a schematic view of the structure of the inside of the valve housing of the present utility model.

In the figure: 1. a cylinder; 2. a cylinder cover; 3. an assembly head; 4. a mounting base; 5. a through hole; 6. a drive shaft; 7. a toothed ring; 8. a piston; 9. a rack; 10. a filter plate; 11. an exhaust pipe; 12. a valve housing; 13. a fixing bolt; 14. a spring; 15. a block; 16. a limit column; 17. a joint; 18. and (5) pushing the spring.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-3, the present utility model provides a technical solution: the pneumatic actuator with the protection structure comprises a cylinder body 1, a cylinder cover 2 and a piston 8, wherein a driving shaft 6 is arranged in the cylinder body 1, a toothed ring 7 is sleeved on the surface of the driving shaft 6, racks 9 meshed with the toothed ring 7 are fixedly connected to the surface of the piston 8, and the toothed ring 7 controls the two groups of pistons 8 to synchronously and reversely move through the two groups of racks 9;

the cylinder cover 2 surface mounting has blast pipe 11 and valve casing 12, and the inside air of cylinder body 1 is discharged through blast pipe 11 when piston 8 removes, valve casing 12 surface is equipped with two sets of joints 17 with blast pipe 11 intercommunication, valve casing 12 inside is equipped with shutoff piece 15, and shutoff piece 15 stops the inside air flow of valve casing 12, and is equipped with top spring 18 between valve casing 12 and the shutoff piece 15, shutoff piece 15 surface is equipped with spacing post 16, and spacing post 16 restriction piston 8 removes the scope, and when piston 8 can't be close to cylinder cover 2, shutoff piece 15 still can be in valve casing 12 side-to-side movement, avoids shutoff piece 15 to strike 12.

The surface of the cylinder cover 2 is inserted with a filter plate 10 covered on the surface of a valve shell 12, the filter plate 10 filters impurities to prevent the exhaust pipe 11 from being blocked, and the edge of the surface of the cylinder cover 2 is inserted with a fixing bolt 13 screwed with the cylinder body 1, so that the cylinder cover 2 is in sealing connection with the cylinder body 1.

The spring 14 is installed on the inner surface of the cylinder cover 2, the other end of the spring 14 abuts against the surface of the corresponding piston 8, and the elastic force of the spring 14 can also control the rotation of the driving shaft 6.

The lower end of the driving shaft 6 penetrates through the cylinder body 1, the lower end of the driving shaft 6 is provided with an assembly head 3, and the assembly head 3 is connected with a screwing shaft of the valve.

The surface of the cylinder body 1 is provided with a mounting seat 4, the surface of the mounting seat 4 is provided with two groups of through holes 5 communicated with the cavity inside the cylinder body 1, and the mounting seat 4 is used for fixing an electromagnetic valve.

The two groups of joints 17 are symmetrically distributed on the surface of the valve casing 12, the valve casing 12 and the plugging block 15 are rectangular, grooves are formed in the surface of the plugging block 15, and the top springs 18 are inserted into the grooves to prevent the top springs 18 from shaking.

Specifically, when in use, after the electromagnetic valve is connected with the mounting seat 4, the electromagnetic valve is communicated with the through hole 5, the cylinder body 1 is connected with the valve, and the assembly head 3 is connected with the screwing shaft of the valve, gas enters into the two groups of pistons 8 through the electromagnetic valve, the gas pressure pushes the two groups of pistons 8 to translate, the pistons 8 drive the driving shaft 6 to rotate through the racks 9 and the toothed rings 7, the driving shaft 6 screws the valve through the assembly head 3, when the pistons 8 push the limiting columns 16 to move, the limiting columns 16 drive the blocking blocks 15 to slide in the valve casings 12 and block the two groups of joints 17, at the moment, air between the pistons 8 and the cylinder cover 2 cannot be discharged through the exhaust pipe 11, the pistons 8 are buffered by the air, the pistons 8 are limited to be continuously close to the cylinder cover 2, and the springs 14 are matched, so that the pistons 8 move smoothly, the vibration inside the cylinder body 1 is not easy to be caused, and the reliability of the pneumatic actuator is improved.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. Pneumatic actuator with protective structure, including cylinder body (1) and cylinder cap (2) and piston (8), its characterized in that: the cylinder body (1) internally mounted has drive shaft (6), toothed ring (7) have been cup jointed on drive shaft (6) surface, piston (8) fixed surface has rack (9) with toothed ring (7) meshing, cylinder cap (2) surface mounting has blast pipe (11) and valve casing (12), valve casing (12) surface is equipped with two sets of joints (17) with blast pipe (11) intercommunication, valve casing (12) inside is equipped with shutoff piece (15), and is equipped with top spring (18) between valve casing (12) and shutoff piece (15), shutoff piece (15) surface is equipped with spacing post (16).

2. A pneumatic actuator with protective structure as defined in claim 1, wherein: the surface of the cylinder cover (2) is inserted with a filter plate (10) covered on the surface of the valve casing (12), and the edge of the surface of the cylinder cover (2) is inserted with a fixing bolt (13) in threaded connection with the cylinder body (1).

3. A pneumatic actuator with protective structure as defined in claim 1, wherein: the spring (14) is arranged on the inner surface of the cylinder cover (2), and the other end of the spring (14) is propped against the surface of the corresponding piston (8).

4. A pneumatic actuator with protective structure as defined in claim 1, wherein: the lower end of the driving shaft (6) penetrates through the cylinder body (1), and the assembling head (3) is arranged at the lower end of the driving shaft (6).

5. A pneumatic actuator with protective structure as defined in claim 1, wherein: the cylinder body (1) surface is equipped with mount pad (4), mount pad (4) surface is equipped with two sets of through-holes (5) with cylinder body (1) inside cavity intercommunication.

6. A pneumatic actuator with protective structure as defined in claim 1, wherein: the two groups of connectors (17) are symmetrically distributed on the surface of the valve casing (12), the valve casing (12) and the plugging block (15) are both rectangular, grooves are formed in the surface of the plugging block (15), and the top springs (18) are inserted into the grooves.