CN213598681U

CN213598681U - Special pneumatic control valve

Info

Publication number: CN213598681U
Application number: CN202022530110.2U
Authority: CN
Inventors: 夏宇
Original assignee: Ningde Aimaisi Intelligent Technology Co ltd
Current assignee: Ningde Aimaisi Intelligent Technology Co ltd
Priority date: 2020-11-05
Filing date: 2020-11-05
Publication date: 2021-07-02
Anticipated expiration: 2030-11-05

Abstract

The application relates to a special pneumatic control valve which is mainly applied to low-medium pressure liquid circuit or oil circuit control, can work in low-medium pressure and high-corrosion resistance environments, is not easy to damage and has low maintenance cost; the valve comprises a valve body, the case, the top cap, spring and gasket, the valve body top is equipped with the top cap, be equipped with the pressure regulating screw on the top cap, the case is located between top cap and the mounting hole, be equipped with the second sealing washer on the case outer wall, first sealing washer and third sealing washer, and the third sealing washer is located between first sealing washer and the second sealing washer, the spring sets up between case and top cap, be equipped with first air inlet on the valve body lateral wall, the second air inlet, import and export, first air inlet output is located between second sealing washer and the top cap, the second air inlet is the apolegamy mouth and its output is located between second sealing washer and the third sealing washer, import and export output are located first sealing washer downside, all be equipped with the pressure release mouth between top cap.

Description

Special pneumatic control valve

Technical Field

The application relates to a special pneumatic control valve which is mainly applied to control of low and medium pressure liquid paths or oil paths.

Background

The existing pneumatic control valve, such as an LGD series of CKD, is sealed by a metal diaphragm, and once foreign matters enter the valve, the diaphragm is deformed, so that the sealing property is poor, and the valve cannot be used.

In summary, an effective solution is urgently needed to solve the problems that the pneumatic control valves commonly used in the existing market are low in working pressure, poor in corrosion resistance and poor in sealing performance or cannot be compatible with the pneumatic control valves, and meanwhile, certain diaphragm valves in the existing market are high in use cost and easy to damage.

SUMMERY OF THE UTILITY MODEL

Based on this, the application provides one kind can work in low-and-medium pressure and high corrosion resistant environment, and not fragile, the special pneumatic control valve of low maintenance cost.

The application provides a special pneumatic control valve, which comprises a valve body, a valve core, a top cover, a spring and a gasket, wherein the top cover is arranged at the top of the valve body, a pressure regulating screw is arranged on the top cover, a mounting hole is arranged at the bottom of the valve body, the valve core is positioned between the top cover and the mounting hole, a second sealing ring, a first sealing ring and a third sealing ring are arranged on the outer wall of the valve core, the third sealing ring is positioned between the first sealing ring and the second sealing ring, the spring is arranged between the valve core and the top cover, the side wall of the valve body is provided with a first air inlet, a second air inlet, an inlet and an outlet, and the output end of the first air inlet is positioned between the second sealing ring and the top cover, the second air inlet is an optional port and the output end of the second air inlet is positioned between the second sealing ring and the third sealing ring, import and export output are located first sealing washer downside, all be equipped with the pressure release mouth between top cap and the valve body.

Preferably, a cavity with an axisymmetric structure is arranged in the valve body, the valve core is arranged in the cavity, and the first air inlet, the second air inlet, the pressure relief opening, the inlet and the outlet are communicated with the cavity.

Preferably, the guide post structure of the valve element head extends inside the inlet and outlet outputs.

Preferably, the inlet and the outlet are symmetrically arranged on two sides of the valve body, and the first air inlet, the second air inlet and the outlet are all located on the same side face.

Preferably, the top of the valve core and the bottom of the top cover are both provided with grooves, and the bottom and the top of the spring are respectively fixed in the grooves at the top of the valve core and the bottom of the top cover.

Preferably, the pressure regulating screw is of a jackscrew structure, a gasket is arranged between the spring and the top cover, and two ends of the gasket are respectively connected with the top end of the spring and the output end of the pressure regulating screw.

Preferably, the outer wall of the valve core is sequentially provided with a first annular groove, a third annular groove and a second annular groove from bottom to top, a first sealing ring, a third sealing ring and a second sealing ring are respectively sleeved inside the first annular groove, the third annular groove and the second annular groove, and the outer walls of the first sealing ring, the third sealing ring and the second sealing ring are all in contact with the inner side wall of the valve body.

Compared with the prior art, the utility model has the following characteristics and beneficial effect:

1. the double sealing of the inlet and the outlet is realized through the guide post of the valve core and the third sealing ring, and the sealing effect is ensured.

2. The pressure regulating screw arranged at the top of the top cover can regulate the position of the top cover, so that the pressure of the valve core is regulated, the sealing in a normal state is ensured and the service life of the valve is effectively prolonged according to the regulation of inlet pressure of different application occasions.

3. The utility model can realize the opening and closing of the valve by bidirectional air inlet, the pressure relief port on the top cover can be used as an air inlet with reverse action on the occasion with higher pressure, the opening and closing of the valve can be realized by switching the first air inlet and the pressure relief port, and the normal opening and closing of the valve can be ensured on the occasion with higher inlet and outlet pressure; and meanwhile, when the service life of the spring is prolonged, the valve is opened and closed by switching the first air inlet and the pressure relief port, so that the service life of the valve is prolonged.

Drawings

In order to more clearly illustrate the embodiments of the present application or technical solutions in related arts, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of the present invention.

Reference numerals: 1. a valve body; 2. a valve core; 3. a top cover; 4. a spring; 5. a gasket; 6. a pressure regulating screw; 7. a pressure relief port; 8. mounting holes; 9. a first seal ring; 10. a second seal ring; 11. a third seal ring; 12. a first air inlet; 13. a second air inlet; 14. an inlet; 15. an outlet; 16. a chamber; 17. a guide post structure; 18. and (4) a groove.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application. All other examples, which can be obtained by a person skilled in the art without making any inventive step based on the examples in this application, are within the scope of protection of this application.

It should be understood by those skilled in the art that technical or scientific terms used in the claims and the specification should have the ordinary meaning as understood by those having ordinary skill in the art to which this application belongs. "connected" or "coupled" and like terms are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect; the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like refer to an orientation or positional relationship as shown in the drawings, which are used for convenience in describing the invention and to simplify the description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore, the above-described terms are not to be construed as limiting the invention.

Referring to fig. 1, in the embodiment of the present application, a special pneumatic control valve is provided, which comprises a valve body 1, a valve core 2, a top cover 3, a spring 4 and a gasket 5, wherein the top cover 3 is arranged on the top of the valve body 1, a pressure regulating screw 6 is arranged on the top cover 3, a mounting hole 8 is arranged on the bottom of the valve body 1, the valve core 2 is arranged between the top cover 3 and the mounting hole 8, a second sealing ring 10, a first sealing ring 9 and a third sealing ring 11 are arranged on the outer wall of the valve core 2, the third sealing ring 11 is arranged between the first sealing ring 9 and the second sealing ring 10, the spring 4 is arranged between the valve core 2 and the top cover 3, a first air inlet 12, a second air inlet 13, an inlet 14 and an outlet 15 are arranged on the side wall of the valve body 1, the output end of the first air inlet 12 is arranged between the second sealing ring 10 and the top, import 14 and 15 output of export are located first sealing washer 9 downside, all are equipped with pressure release mouth 7 between top cap 3 and the valve body 1, realize the switching of valve through two-way admitting air, the during operation admits air through first air inlet 12 and realizes opening of valve with case 2 jack-up, pressure release mouth 7 is the pressure release effect, when pressure release mouth 7 or second air inlet 13 admit air, 12 pressure releases of first air inlet, realizes closing of valve.

Preferably, a cavity 16 with an axisymmetric structure is arranged inside the valve body 1, the valve core 2 is arranged inside the cavity 16, the first air inlet 12, the second air inlet 13, the pressure relief port 7, the inlet 14 and the outlet 15 are all communicated with the cavity 16, the first air inlet 12, the second air inlet 13 and the pressure relief port 7 are pressurized and depressurized through the cavity 16, and the inlet 14 and the outlet 15 are used for conveying gas through the cavity 16.

Preferably, the guide post structure 17 at the head of the valve core 2 extends into the inner side of the output ends of the inlet 14 and the outlet 15, and the guide post structure 17 of the valve core 2 blocks a channel between the inlet 14 and the outlet 15 in a normal state, and can be combined with the third sealing ring 11 to realize double sealing.

Preferably, the inlet 14 and the outlet 15 are symmetrically arranged on two sides of the valve body 1, and the first air inlet 12, the second air inlet 13 and the outlet 15 are all located on the same side face, so that the valve body 1 is convenient to use.

Preferably, the top of the valve core 2 and the bottom of the top cover 3 are both provided with grooves 18, and the bottom and the top of the spring 4 are respectively fixed in the grooves 18 at the top of the valve core 2 and the bottom of the top cover 3, so that the fixing effect on the spring 4 is improved.

Preferably, the pressure regulating screw 6 is of a jackscrew structure, a gasket 5 is arranged between the spring 4 and the top cover 3, two ends of the gasket 5 are respectively connected with the top end of the spring 4 and the output end of the pressure regulating screw 6, the gasket 5 is pressed through the pressure regulating screw 6, the spring 4 is pressed through the gasket 5, and the purpose of pressure regulation is achieved by changing the deformation of the spring 4 through the pressing depth of the screw.

Preferably, the outer wall of the valve core 2 is sequentially provided with a first annular groove, a third annular groove and a second annular groove from bottom to top, the first sealing ring 9, the third sealing ring 11 and the second sealing ring 10 are respectively sleeved inside the first annular groove, the third annular groove and the second annular groove, the outer walls of the first sealing ring 9, the third sealing ring 11 and the second sealing ring 10 are all contacted with the inner side wall of the valve body 1, and the using effect of the sealing rings is guaranteed.

In summary, according to the special pneumatic control valve provided in the embodiment of the present invention, the valve core 2 is pushed downward by the elastic force of the spring 4 in a normal state, and at this time, the first sealing ring 9 is in close contact with the inner wall of the valve body 1 to perform bidirectional sealing on the inlet 14 and the outlet 15, and meanwhile, because the structure adopts a double air inlet, the valve core 2 can also move downward by the action of air pressure by introducing compressed air into the second air inlet 13 or the pressure relief port 7, thereby realizing sealing; during operation, compressed air is introduced into the valve body 1 through the first air inlet 12, the valve core 2 is pushed to move upwards under the action of air pressure, so that the first sealing ring 9 is not in close contact with the inner wall of the valve body 1 any more, the sealing of the inlet 14 and the outlet 15 is opened, and the inlet 14 and the outlet 15 are communicated.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A exclusively pneumatic control valve, characterized by comprising: comprises a valve body (1), a valve core (2), a top cover (3), a spring (4) and a gasket (5), wherein the top cover (3) is arranged at the top of the valve body (1), a pressure regulating screw (6) is arranged on the top cover (3), a mounting hole (8) is arranged at the bottom of the valve body (1), the valve core (2) is positioned between the top cover (3) and the mounting hole (8), a second sealing ring (10), a first sealing ring (9) and a third sealing ring (11) are arranged on the outer wall of the valve core (2), the third sealing ring (11) is positioned between the first sealing ring (9) and the second sealing ring (10), the spring (4) is arranged between the valve core (2) and the top cover (3), a first air inlet (12), a second air inlet (13), an inlet (14) and an outlet (15) are arranged on the side wall of the valve body (1), and the output end of the first air inlet (12) is positioned between the, second air inlet (13) are for the apolegamy mouth and its output is located between second sealing washer (10) and third sealing washer (11), import (14) and export (15) output are located first sealing washer (9) downside, all be equipped with pressure release mouth (7) between top cap (3) and valve body (1).

2. A special pneumatic control valve according to claim 1, characterized in that a chamber (16) with an axisymmetric structure is arranged inside the valve body (1), the valve core (2) is arranged inside the chamber (16), and the first air inlet (12), the second air inlet (13), the pressure relief port (7), the inlet (14) and the outlet (15) are all communicated with the chamber (16).

3. A special pneumatic control valve according to claim 1, characterized in that the guide post structures (17) of the head of the spool (2) extend inside the outlet ends of the inlet (14) and outlet (15).

4. A special pneumatic control valve according to claim 1, characterized in that the inlet (14) and outlet (15) are symmetrically arranged on both sides of the valve body (1), and the first inlet (12), second inlet (13) and outlet (15) are all located on the same side.

5. A special pneumatic control valve according to claim 1, characterized in that the top of the valve core (2) and the bottom of the top cover (3) are provided with grooves (18), and the bottom and the top of the spring (4) are fixed in the grooves (18) at the top of the valve core (2) and the bottom of the top cover (3), respectively.

6. A special pneumatic control valve according to claim 1, wherein the pressure regulating screw (6) is of a jackscrew structure, a gasket (5) is arranged between the spring (4) and the top cover (3), and two ends of the gasket (5) are respectively connected with the top end of the spring (4) and the output end of the pressure regulating screw (6).

7. A special pneumatic control valve according to claim 1, wherein the outer wall of the valve core (2) is provided with a first annular groove, a third annular groove and a second annular groove in sequence from bottom to top, the first sealing ring (9), the third sealing ring (11) and the second sealing ring (10) are respectively sleeved inside the first annular groove, the third annular groove and the second annular groove, and the outer walls of the first sealing ring (9), the third sealing ring (11) and the second sealing ring (10) are all in contact with the inner side wall of the valve body (1).