Pneumatic control valve

Abstract

The utility model relates to the technical field of pneumatic control valves, in particular to a pneumatic control valve which comprises a valve body, a cylinder body and an end cover, the valve body is connected and installed at one end of the cylinder body through a screw, the end cover is assembled at the other end of the cylinder body, and a valve element for controlling an air inlet and a working port of the valve body to be communicated or closed is arranged in the cylinder body. According to the pneumatic control valve, the anti-rotation mechanism is arranged between the cylinder body and the piston of the pneumatic control valve, namely the kidney-shaped hole for preventing the valve element from rotating is formed in the cylinder body, so that the valve element is prevented from rotating relative to the cylinder body in the using process of the pneumatic control valve, and the riveting nut is prevented from loosening; therefore, the anti-rotation mechanism ensures the use reliability of the pneumatic control valve; and when the valve core is stressed to move upwards, the valve core does not directly collide with the internal step of the cylinder body, but is buffered by a section of buffer rubber pad firstly and then collides with the internal step of the cylinder body, so that the noise generated in the use process of the pneumatic control valve is weakened, and meanwhile, the abrasion of the valve core is also reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of air-controlled valves, in particular to an air-controlled valve. Background Art

[0002] The air-controlled valve is a pneumatic control valve, which is mostly installed in the pneumatic control part of large equipment. The air-controlled valve brings practicality and portability to work in actual use, but there are still areas that need improvement, as follows: There is no anti-rotation mechanism between the cylinder body and the piston of the air-controlled valve. As a result, when the air-controlled valve is in use, the valve core rotates relative to the cylinder body, which causes the riveting screws to loosen, reducing the reliability of the air-controlled valve. When the valve control hole is opened for ventilation, the piston assembly drives the valve core upward to open the valve port, and the valve core will directly collide with the step inside the cylinder body, thereby generating noise during use and accelerating the wear of the valve core.

[0003] In summary, the utility model solves the existing problems by designing an air-controlled valve. Utility Model Content

[0004] The purpose of the utility model is to provide a gas-controlled valve to solve the problems raised in the above-mentioned background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A pneumatic control valve comprises a valve body, a cylinder body and an end cover, wherein the valve body is mounted on one end of the cylinder body by screw connection, and the other end of the cylinder body is equipped with an end cover, a valve core for controlling the communication or closure of an air inlet and a working port of the valve body is arranged inside the cylinder body, a waist-shaped hole for preventing the valve core from rotating is arranged inside the cylinder body, wherein the valve core is connected to the waist-shaped hole by sliding up and down, a buffer rubber pad, a valve stem guide ring, a sealing inner ring, a piston, a sealing flat pad and a riveted nut are sequentially sleeved on the outer wall of the valve core in the inner cavity of the cylinder body, a return spring is connected to the outside of the riveted nut and located above the piston, and the other end of the return spring is connected to the bottom of the inner cavity of the end cover, the valve core is a stepped valve stem, wherein a step is arranged inside the cylinder body and corresponding to the stepped valve stem, wherein when the valve core is forced to move upward, the valve core will not directly collide with the step inside the cylinder body, but will first be buffered by a section of buffer rubber pad, and then collide with the step inside the cylinder body, thereby reducing the noise generated by the pneumatic control valve during use.

[0007] As a preferred solution of the utility model, the cylinder body is an integrated cylinder body, and a valve body sealing ring annular groove is provided at one end of the valve body and at the connection between the valve body and the cylinder body, wherein the valve body sealing ring annular groove has an interference fit with the valve body sealing ring.

[0008] As a preferred solution of the utility model, an end cover sealing ring is interference fit at the connection between the cylinder body and the end cover, an upper spring gasket is arranged in the inner cavity of the end cover and corresponding to the end cover and the return spring, and a lower spring gasket positioning annular groove is provided on the end surface of the piston and on the side close to the return spring, wherein a lower spring gasket is assembled inside the lower spring gasket positioning annular groove.

[0009] As a preferred solution of the utility model, the riveted nut is threadedly connected to the end of the valve core, and a flat gasket sealing ring is provided at the connection between the piston and the sealing flat gasket, wherein the flat gasket sealing ring is assembled inside a flat gasket sealing ring annular groove provided on the piston end face.

[0010] As a preferred solution of the utility model, a piston guide ring and a two-way O-ring are installed in sequence from top to bottom at the connection between the piston and the cylinder body. The piston guide ring and the two-way O-ring are correspondingly assembled inside the annular groove opened on the outer wall of the piston.

[0011] As a preferred solution of the utility model, the valve stem guide rings are provided in two groups, wherein the sealing inner ring is provided between the two groups of valve stem guide rings, and the sealing inner ring and the two groups of valve stem guide rings are respectively assembled inside the annular grooves opened on the outer wall of the valve core.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] In the utility model, an anti-rotation mechanism is adopted between the cylinder body and the piston of the air control valve, that is, a waist-shaped hole is arranged inside the cylinder body to prevent the valve core from rotating, so as to prevent the valve core from rotating relative to the cylinder body during the use of the air control valve, thereby causing the riveting nut to loosen, so that the anti-rotation mechanism ensures the reliability of the use of the air control valve;

[0014] And when the valve core moves upward under force, the valve core will not directly collide with the step inside the cylinder body, but will first be buffered by a buffer rubber pad and then collide with the step inside the cylinder body, thereby reducing the noise generated by the air control valve during use and reducing the wear of the valve core. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the cross-sectional structure of the gas-controlled valve of the utility model;

[0016] Figure 2 This is a schematic diagram of the three-dimensional structure of the gas-controlled valve of the utility model;

[0017] Figure 3 For this utility model Figure 1 Schematic diagram of the AA cross-section structure.

[0018] In the figure: 1. valve body; 2. cylinder body; 3. end cover; 4. valve core; 5. buffer rubber pad; 6. valve stem guide ring; 7. sealing inner ring; 8. piston; 9. sealing flat gasket; 10. riveted nut; 11. reset spring; 12. valve body sealing ring; 13. end cover sealing ring; 14. upper spring gasket; 15. lower spring gasket; 16. flat gasket sealing ring; 17. piston guide ring; 18. two-way O-ring; 201. waist-shaped hole. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0020] To facilitate the understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings, and several embodiments of the present invention are given. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0021] It should be noted that when an element is referred to as being "fixed on" another element, it may be directly on the other element or there may also be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this article are for illustrative purposes only.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used in this article includes any and all combinations of one or more related listed items.

[0023] For examples, see Figure 1-3 , the utility model provides a technical solution:

[0024] A gas-controlled valve comprises a valve body 1, a cylinder body 2 and an end cover 3. The valve body 1 is installed at one end of the cylinder body 2 by screw connection, so that when the gas-controlled valves are installed in batches, the relative positions of the valve opening control port and the valve body are consistent, and this installation method can ensure the consistency of the appearance of the gas-controlled valves after installation;

[0025] The other end of the cylinder body 2 is equipped with an end cover 3, and a valve core 4 for controlling the air inlet and the working port of the valve body 1 to be connected or closed is arranged inside the cylinder body 2, and a waist-shaped hole 201 is arranged inside the cylinder body 2 to prevent the valve core 4 from rotating, wherein the valve core 4 is connected to the waist-shaped hole 201 by sliding up and down, and a buffer rubber pad 5, a valve stem guide ring 6, a sealing inner ring 7, a piston 8, a sealing flat pad 9 and a riveted nut 10 are sleeved in sequence on the outer wall of the valve core 4 in the inner cavity of the cylinder body 2, and a reset spring 11 is connected to the outside of the riveted nut 10 and located above the piston 8, and the other end of the reset spring 11 is connected to the bottom of the inner cavity of the end cover 3, and the valve core 4 is a stepped valve stem, wherein a step is arranged inside the cylinder body 2 and corresponding to the stepped valve stem, wherein when the valve core 4 is forced to move upward, the valve core 4 will not directly collide with the step inside the cylinder body 2, but will first be buffered by a section of the buffer rubber pad 5, and then collide with the step inside the cylinder body 2, thereby reducing the noise generated by the air control valve during use;

[0026] The structure in which the end cover 3, the piston 8 and the valve core 4 cooperate is processed in a one-time manner, so that this processing method ensures the shape and position tolerances of the cylinder parts, so that after the air control valve is assembled, the cylinder 2, the end cover 3, the piston 8 and the valve core 4 have good coaxiality and verticality with each other, and at the same time, the air control valve has good sealing and service life during use.

[0027] As a preferred embodiment of the utility model: the cylinder body 2 is an integrated cylinder body, so that the finished air-controlled valve has a simple and beautiful appearance, and a valve body sealing ring annular groove is provided at one end of the valve body 1 and at the connection between the valve body 1 and the cylinder body 2, wherein the internal interference fit of the valve body sealing ring annular groove is provided with a valve body sealing ring 12.

[0028] As a preferred embodiment of the utility model: an end cover sealing ring 13 is interference fit at the connection between the cylinder body 2 and the end cover 3, an upper spring gasket 14 is arranged in the inner cavity of the end cover 3 and corresponding to the end cover 3 and the return spring 11, and a lower spring gasket positioning annular groove is provided on the end surface of the piston 8 and on the side close to the return spring 11, wherein a lower spring gasket 15 is assembled inside the lower spring gasket positioning annular groove.

[0029] As a preferred embodiment of the utility model: the riveted nut 10 is threadedly connected to the end of the valve core 4, and a flat gasket sealing ring 16 is provided at the connection between the piston 8 and the sealing flat gasket 9, wherein the flat gasket sealing ring 16 is assembled on the end face of the piston 8 and has a flat gasket sealing ring annular groove inside.

[0030] As a preferred embodiment of the utility model: a piston guide ring 17 and a two-way O-ring 18 are installed in sequence from top to bottom at the connection between the piston 8 and the cylinder body 2. The piston guide ring 17 and the two-way O-ring 18 are correspondingly assembled inside the annular groove opened on the outer wall of the piston 8.

[0031] As a preferred embodiment of the utility model: two groups of valve stem guide rings 6 are provided, wherein the sealing inner ring 7 is provided between the two groups of valve stem guide rings 6, and the sealing inner ring 7 and the two groups of valve stem guide rings 6 are respectively assembled inside the annular grooves opened on the outer wall of the valve core 4.

[0032] The utility model workflow: Figure 1 The arrows in the figure indicate the air inlet and the working port (air outlet). When compressed air is introduced into the valve opening control port, the lower chamber of the piston 8 drives the valve core 4 upward under the action of the air pressure. At this time, the valve core 4 opens the valve port, and the air inlet and the working port are connected. When the compressed air is discharged from the valve opening control port, the reset spring 11 pushes the piston 8 downward and drives the valve core 4 to reset. At this time, the valve core 4 closes the valve port, and the air inlet and the working port are closed.

[0033] The air control valve has an anti-rotation mechanism between the cylinder 2 and the piston 8, that is, a waist-shaped hole 201 is provided inside the cylinder 2 to prevent the valve core 4 from rotating. Figure 3 , to prevent the valve core 4 from rotating relative to the cylinder body 2 during the use of the air control valve, thereby causing the riveting nut 10 to loosen, so that the anti-rotation mechanism ensures the reliability of the use of the air control valve;

[0034] When the valve core 4 is forced to move upward, the valve core 4 will not directly collide with the internal step of the cylinder body 2, but will first be buffered by a section of buffer rubber pad 5, and then collide with the internal step of the cylinder body 2, thereby reducing the noise generated by the air control valve during use, and also reducing the wear of the valve core;

[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A gas-controlled valve, comprising a valve body (1), a cylinder body (2) and an end cover (3), characterized in that: The valve body (1) is installed on one end of the cylinder body (2) by screw connection, and the other end of the cylinder body (2) is equipped with an end cover (3). The cylinder body (2) is provided with a valve core (4) for controlling the connection or closing of the air inlet and the working port of the valve body (1). The cylinder body (2) is provided with a waist-shaped hole (201) for preventing the valve core (4) from rotating, wherein the valve core (4) is connected to the waist-shaped hole (201) by sliding up and down. The inner cavity of the cylinder body (2) and the outer wall of the valve core (4) are sequentially sleeved with a buffer rubber pad (5), a valve stem guide ring (6), a sealing inner ring (7), a piston (8), a sealing flat pad ( 9) and a riveted nut (10), the outside of the riveted nut (10) and located above the piston (8) is connected to a return spring (11), the other end of the return spring (11) is connected to the bottom of the inner cavity of the end cover (3), the valve core (4) is a stepped valve stem, wherein a step is arranged inside the cylinder body (2) and corresponding to the stepped valve stem, wherein when the valve core (4) is forced to move upward, the valve core (4) will not directly collide with the step inside the cylinder body (2), but will first be buffered by a buffer rubber pad (5) and then collide with the step inside the cylinder body (2), thereby reducing the noise generated by the air control valve during use.

2. The gas-controlled valve according to claim 1, characterized in that: The cylinder body (2) is an integrated cylinder body, and a valve body sealing ring annular groove is provided at one end of the valve body (1) and at the connection point between the valve body (1) and the cylinder body (2), wherein the valve body sealing ring annular groove has a valve body sealing ring (12) in an interference fit therein.

3. The gas-controlled valve according to claim 1, characterized in that: An end cover sealing ring (13) is provided at the joint of the cylinder body (2) and the end cover (3) in an interference fit, an upper spring gasket (14) is provided in the inner cavity of the end cover (3) and at a position corresponding to the end cover (3) and the return spring (11), and a lower spring gasket positioning annular groove is provided on the end surface of the piston (8) and on a side close to the return spring (11), wherein a lower spring gasket (15) is mounted inside the lower spring gasket positioning annular groove.

4. The gas-controlled valve according to claim 1, characterized in that: The riveted nut (10) is threadedly connected to the end of the valve core (4), and a flat gasket sealing ring (16) is provided at the connection between the piston (8) and the sealing flat gasket (9), wherein the flat gasket sealing ring (16) is assembled on the end surface of the piston (8) and has an annular groove for the flat gasket sealing ring.

5. The gas-controlled valve according to claim 1, characterized in that: A piston guide ring (17) and a bidirectional O-ring (18) are installed in sequence from top to bottom at the connection between the piston (8) and the cylinder body (2); the piston guide ring (17) and the bidirectional O-ring (18) are correspondingly assembled inside the annular groove opened on the outer wall of the piston (8).

6. The gas-controlled valve according to claim 1, characterized in that: The valve stem guide rings (6) are provided in two groups, wherein the sealing inner ring (7) is provided between the two groups of valve stem guide rings (6), and the sealing inner ring (7) and the two groups of valve stem guide rings (6) are respectively assembled inside the annular grooves provided on the outer wall of the valve core (4).

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