CN219774479U

CN219774479U - Pneumatic control valve gas circuit structure

Info

Publication number: CN219774479U
Application number: CN202320887247.4U
Authority: CN
Inventors: 芶国平; 杨正岳; 程凯
Original assignee: Wuxi Lapool Technology Co ltd
Current assignee: Wuxi Lapool Technology Co ltd
Priority date: 2023-04-19
Filing date: 2023-04-19
Publication date: 2023-09-29
Anticipated expiration: 2033-04-19

Abstract

The utility model relates to a pneumatic control valve gas circuit structure. The utility model comprises a valve body, wherein a pilot gas port, a piston cavity communicated with the pilot gas port and a working gas cavity communicated with the piston cavity are sequentially arranged along the axial direction of the valve body, and a discharge port communicated with the working gas cavity is arranged along the radial direction of the valve body; the valve core assembly comprises a piston head movably connected in the piston cavity, a valve core connected with the piston head and movably connected in the working air cavity, and elastic elements respectively propped against the side walls of the valve core and the working air cavity, and an elastic element cavity is formed between one end of the valve core, connected with the elastic elements, and the side walls of the working air cavity; when the elastic element is in a compressed state, gas in the piston cavity and gas in the elastic element cavity can be discharged from the gas channel to the discharge port respectively; the valve body can conveniently discharge gas in the valve body, and the problem that the pneumatic control valve is invalid due to the fact that external liquid or corrosive gas enters the valve body through a valve body gap is avoided.

Description

Pneumatic control valve gas circuit structure

Technical Field

The utility model relates to the technical field of pneumatic control valves, in particular to a pneumatic control valve gas circuit structure.

Background

The pneumatic control valve refers to various pneumatic elements which control the pressure, flow and flow direction of air flow in a pneumatic system and ensure the normal operation of a pneumatic executing element or mechanism.

At present, most of the exhaust modes of the pneumatic control valve are used for exhausting through gaps among the valve bodies, and external liquid or corrosive gas is easy to invade the inside of the pneumatic control valve by the mode, so that the pneumatic control valve is invalid; or cause the transfer of external liquids or corrosive gases through the pneumatic valve to other components connected to the pneumatic valve.

Disclosure of Invention

Therefore, the utility model aims to solve the technical problem that the pneumatic control valve is invalid due to the invasion of external liquid or corrosive gas into the pneumatic control valve body in the prior art.

In order to solve the technical problems, the utility model provides a pneumatic control valve air path structure, comprising:

the valve body is axially provided with a pilot gas port, a piston cavity communicated with the pilot gas port and a working gas cavity communicated with the piston cavity in sequence, and is radially provided with a discharge port communicated with the working gas cavity;

the valve core assembly comprises a piston head movably connected in the piston cavity, a valve core connected with the piston head and movably connected in the working air cavity, and elastic elements respectively propped against the side walls of the valve core and the working air cavity, and an elastic element cavity is formed between one end of the valve core, connected with the elastic elements, and the side walls of the working air cavity;

when the elastic element is in a compressed state, gas in the piston cavity and gas in the elastic element cavity can be discharged from the gas channel to the discharge port respectively.

In one embodiment of the utility model, the air passage comprises an axial air passage which is arranged along the valve core and is communicated with the elastic element cavity, a first radial air passage and a second radial air passage which are respectively communicated with the axial air passage, wherein the first radial air passage is communicated with the piston cavity, and the second radial air passage is communicated with the working air cavity;

when the elastic element is in a compressed state, the gas in the piston cavity is discharged from the first radial air passage, the axial air passage and the second radial air passage to the discharge port, and the gas in the elastic element cavity is discharged from the axial air passage and the second radial air passage to the discharge port.

In one embodiment of the utility model, an air inlet and an air outlet which are respectively communicated with the working air cavity are also arranged along the radial direction of the valve body;

when the elastic element is in a compressed state, the air inlet is communicated with the air outlet through the working air cavity.

In one embodiment of the utility model, an annular notch is provided along the circumference of the valve core, and is located beside the air inlet and the air outlet when the elastic element is in a compressed state.

In one embodiment of the utility model, the valve body comprises a valve body, a pilot cover and an end cover which are connected with two axial ends of the valve body, the pilot air port is arranged on the pilot cover, the piston cavity is arranged between the pilot cover and the valve body, and the elastic element cavity is arranged between the valve body and the end cover.

In one embodiment of the utility model, a sealing ring is arranged between the pilot cap and the valve body and/or between the valve body and the end cap.

In one embodiment of the utility model, the elastic element comprises a return spring, the valve core is provided with a mounting groove at one end of the valve core, which is far away from the piston head, and a part of the return spring is arranged in the mounting groove.

Compared with the prior art, the technical scheme of the utility model has the following advantages:

according to the pneumatic control valve air path structure, the air path channel is arranged in the valve core, air in the piston cavity and air in the elastic element cavity can be discharged from the air path channel to the discharge port respectively, so that air in the valve body can be conveniently discharged, the problem that the pneumatic control valve is invalid due to the fact that external liquid or corrosive air enters the valve body through the valve body gap is solved, the integral structure is compact, various pipelines are not needed to be connected, and the installation space is greatly saved.

Drawings

In order that the utility model may be more readily understood, a more particular description of the utility model will be rendered by reference to specific embodiments thereof that are illustrated in the appended drawings.

FIG. 1 is a schematic diagram of the overall structure of the pneumatic control valve air path structure of the present utility model.

Description of the specification reference numerals:

1. a valve body; 11. a pilot gas port; 12. a piston chamber; 13. a working air chamber; 14. a bleed port; 15. an air inlet; 16. an exhaust port; 17. a pilot cap; 18. an end cap; 19. a seal ring;

2. a valve core assembly; 21. a piston head; 22. a valve core; 221. an annular notch; 222. a mounting groove; 23. an elastic element; 24. an elastic element cavity;

3. an air path channel; 31. an axial airway; 32. a first radial airway; 33. a second radial airway.

Detailed Description

The present utility model will be further described with reference to the accompanying drawings and specific examples, which are not intended to be limiting, so that those skilled in the art will better understand the utility model and practice it.

In the present utility model, if directions (up, down, left, right, front and rear) are described, they are merely for convenience of description of the technical solution of the present utility model, and do not indicate or imply that the technical features must be in a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

In the present utility model, "a plurality of" means one or more, and "a plurality of" means two or more, and "greater than", "less than", "exceeding", etc. are understood to not include the present number; "above", "below", "within" and the like are understood to include this number. In the description of the present utility model, the description of "first" and "second" if any is used solely for the purpose of distinguishing between technical features and not necessarily for the purpose of indicating or implying a relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the present utility model, unless clearly defined otherwise, terms such as "disposed," "mounted," "connected," and the like should be construed broadly and may be connected directly or indirectly through an intermediate medium, for example; the connecting device can be fixedly connected, detachably connected and integrally formed; can be mechanically connected, electrically connected or capable of communicating with each other; may be a communication between two elements or an interaction between two elements. The specific meaning of the words in the utility model can be reasonably determined by a person skilled in the art in combination with the specific content of the technical solution.

Referring to fig. 1, a pneumatic control valve air path structure of the present utility model includes:

the valve comprises a valve body 1, wherein a pilot gas port 11, a piston cavity 12 communicated with the pilot gas port 11 and a working gas cavity 13 communicated with the piston cavity 12 are sequentially arranged along the axial direction of the valve body 1, and a discharge port 14 communicated with the working gas cavity 13 is arranged along the radial direction of the valve body 1;

the valve core assembly 2 comprises a piston head 21 movably connected in the piston cavity 12, a valve core 22 connected with the piston head 21 and movably connected in the working air cavity 13, and elastic elements 23 respectively propped against the valve core 22 and the side wall of the working air cavity 13, wherein an elastic element cavity 24 is formed between one end of the valve core 22 connected with the elastic elements 23 and the side wall of the working air cavity 13;

wherein, the valve core 22 is provided with a gas path channel 3, and when the elastic element 23 is in a compressed state, the gas in the piston cavity 12 and the gas in the elastic element cavity 24 can be discharged from the gas path channel 3 to the discharge port 14.

More specifically, the air passage 3 includes an axial air passage 31 provided along the spool 22 and communicating with the elastic member chamber 24, a first radial air passage 32 and a second radial air passage 33 communicating with the axial air passage 31, respectively, the first radial air passage 32 communicating with the piston chamber 12, and the second radial air passage 33 communicating with the working air chamber 13; when the elastic element 23 is in a compressed state, the gas in the piston chamber 12 is discharged from the first radial air passage 32, the axial air passage 31, the second radial air passage 33 to the discharge port 14, and the gas in the elastic element chamber 24 is discharged from the axial air passage 31, the second radial air passage 33 to the discharge port 14.

More specifically, an air inlet 15 and an air outlet 16 which are respectively communicated with the working air cavity 13 are also arranged along the radial direction of the valve body 1; when the elastic member 23 is in a compressed state, the air inlet 15 communicates with the air outlet 16 through the working air chamber 13. In this embodiment, an annular notch 221 is provided along the circumference of the valve core 22, when the elastic element 23 is in a compressed state, the annular notch 221 is located at the side of the air inlet 15 and the air outlet 16, and when the elastic element 23 is in a recovery state, the air inlet 15 can be plugged by the side wall of the valve core 22, so that the air inlet 15 and the air outlet 16 can be conveniently opened or closed.

Specifically, the valve body 1 includes a valve body, a pilot cap 17 and an end cap 18 connected to two ends of the valve body in an axial direction, the pilot gas port 11 is disposed on the pilot cap 17, the piston chamber 12 is disposed between the pilot cap 17 and the valve body, and the elastic element chamber 24 is disposed between the valve body and the end cap 18.

Specifically, sealing rings 19 are provided between the pilot cap 17 and the valve body and between the valve body and the end cap 18.

Specifically, the elastic member 23 includes a return spring, the spool 22 is provided with a mounting groove 222 at an end thereof remote from the piston head 21, and a portion of the return spring is provided in the mounting groove 222.

Referring to fig. 1, in operation, compressed air is input through the pilot air port 11, the compressed air pushes the piston head 21 to move rightwards, the piston head 21 drives the valve core 22 to move rightwards, and meanwhile, the elastic element 23 is compressed, gas in the piston cavity 12 is compressed through the piston head 21, and the gas in the piston cavity 12 is discharged from the first radial air passage 32, the axial air passage 31 and the second radial air passage 33 to the discharge port 14; at the same time, the gas in the elastic element cavity 24 is compressed and discharged from the axial air passage 31 and the second radial air passage 33 to the discharge port 14. At this time, the air inlet 15 is communicated with the air outlet 16, and an external air path connected with the air inlet 15 performs work to the outside through the air outlet 16; when no compressed air is input to the air guide port 11, the elastic element 23 is restored, and pushes the valve core 22 and the piston head 21 to move left, and at this time, the air inlet 15 is blocked by the valve core 22.

Finally, it should be noted that the above-mentioned embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same, and although the present utility model has been described in detail with reference to examples, it should be understood by those skilled in the art that modifications and equivalents may be made to the technical solution of the present utility model without departing from the spirit and scope of the technical solution of the present utility model, and all such modifications and equivalents are intended to be encompassed in the scope of the claims of the present utility model.

Claims

1. The utility model provides a pneumatic control valve gas circuit structure which characterized in that includes:

the valve comprises a valve body (1), wherein a pilot gas port (11), a piston cavity (12) communicated with the pilot gas port (11) and a working gas cavity (13) communicated with the piston cavity (12) are sequentially arranged along the axial direction of the valve body (1), and a discharge port (14) communicated with the working gas cavity (13) is arranged along the radial direction of the valve body (1);

the valve core assembly (2), the valve core assembly (2) comprises a piston head (21) movably connected in the piston cavity (12), a valve core (22) connected with the piston head (21) and movably connected in the working air cavity (13), and elastic elements (23) respectively propped against the side walls of the valve core (22) and the working air cavity (13), and an elastic element cavity (24) is formed between one end of the valve core (22) connected with the elastic elements (23) and the side walls of the working air cavity (13);

when the elastic element (23) is in a compressed state, gas in the piston cavity (12) and gas in the elastic element cavity (24) can be discharged from the gas channel (3) to the discharge port (14) respectively.

2. A pneumatic valve air circuit structure according to claim 1, characterized in that said air circuit channel (3) comprises an axial air channel (31) arranged along said valve core (22) and communicating with said elastic element cavity (24), a first radial air channel (32) and a second radial air channel (33) respectively communicating with said axial air channel (31), said first radial air channel (32) communicating with said piston cavity (12), said second radial air channel (33) communicating with said working air cavity (13);

when the elastic element (23) is in a compressed state, the gas in the piston cavity (12) is discharged from the first radial air passage (32), the axial air passage (31) and the second radial air passage (33) to the discharge port (14), and the gas in the elastic element cavity (24) is discharged from the axial air passage (31) and the second radial air passage (33) to the discharge port (14).

3. The pneumatic control valve air path structure according to claim 1, characterized in that an air inlet (15) and an air outlet (16) which are respectively communicated with the working air cavity (13) are also arranged along the radial direction of the valve body (1);

when the elastic element (23) is in a compressed state, the air inlet (15) is communicated with the air outlet (16) through the working air cavity (13).

4. A pneumatic valve air circuit structure according to claim 3, characterized in that an annular notch (221) is provided along the circumference of the valve core (22), said annular notch (221) being located beside the air inlet (15) and the air outlet (16) respectively when the elastic element (23) is in a compressed state.

5. A pneumatic control valve air path structure according to claim 1, characterized in that the valve body (1) comprises a valve body, a pilot cap (17) and an end cap (18) which are connected with two axial ends of the valve body, the pilot air port (11) is arranged on the pilot cap (17), the piston cavity (12) is arranged between the pilot cap (17) and the valve body, and the elastic element cavity (24) is arranged between the valve body and the end cap (18).

6. A pneumatic control valve air path structure according to claim 5, characterized in that a sealing ring (19) is arranged between the pilot cap (17) and the valve body and/or between the valve body and the end cap (18).

7. A pneumatic control valve air path structure according to claim 1, characterized in that the elastic element (23) comprises a return spring, the valve core (22) is provided with a mounting groove (222) at one end far away from the piston head (21), and a part of the return spring is arranged in the mounting groove (222).