CN115163893A - Bidirectional pressure self-adaptive switch valve - Google Patents

Abstract

The invention relates to a bidirectional pressure self-adaptive switch valve which comprises a valve body, wherein a valve cavity is arranged in the valve body, an exhaust hole and an air inlet hole which are communicated with the valve cavity are correspondingly arranged on the upper side and the lower side of the valve cavity, a valve core capable of sliding up and down is arranged in the valve cavity, an exhaust channel is arranged between the valve core and the peripheral wall of the valve cavity, an upper sealing piece and a lower sealing piece which are matched with the exhaust hole and the air inlet hole are correspondingly arranged on the upper end and the lower end of the valve core, and a spring is arranged between the valve core and the top wall of the valve cavity. The adjustable pressure regulator has the advantages of simple structure, convenience in adjustment, strong adaptability, safety and reliability.

Description

A bidirectional pressure adaptive switch valve

technical field

The invention relates to a control valve, in particular to a bidirectional pressure self-adaptive on-off valve capable of realizing medium-pressure exhaust and high-low pressure sealing closure.

Background technique

As a pipeline valve, the on-off valve is mainly used for the sealing and exhausting of pipelines in different pressure ranges to achieve pressure control. However, the existing on-off valve has the problems of complex structure and poor adaptability in practical application, which needs to be improved or perfected.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a bidirectional pressure adaptive switch valve, which has the advantages of simple structure, convenient adjustment, strong adaptability, safety and reliability.

In order to solve the above problems existing in the prior art, the present invention provides a two-way pressure adaptive switch valve, comprising a valve body, a valve cavity is arranged in the valve body, and the upper and lower sides of the valve cavity are correspondingly provided with exhaust holes communicating with it. There is a valve core that can slide up and down in the valve cavity, an exhaust channel is arranged between the valve core and the peripheral wall of the valve cavity, and the upper and lower ends of the valve core are provided with corresponding exhaust holes and intake holes. A spring is provided between the upper seal and the lower seal, the valve core and the top wall of the valve cavity.

Further, the present invention provides a two-way pressure self-adaptive on-off valve, which further includes a plug cover set composed of a plurality of exhaust plug covers. The gas plug cover is installed on the valve body and makes the exhaust hole communicate with the atmosphere through the exhaust port.

Further, the present invention is a bidirectional pressure adaptive switch valve, wherein the upper and lower ends of the valve body are correspondingly provided with an upper joint and a lower joint, the upper joint and the lower joint are respectively provided with threads, and the exhaust plug cover is provided with threads. Installed on the upper connector.

Further, the present invention is a bidirectional pressure adaptive switch valve, wherein the valve body includes an upper valve body and a lower valve body that are coaxially sleeved and connected by threads, and a seal is provided between the upper valve body and the lower valve body. The upper joint is arranged at the top of the upper valve body, and the lower joint is arranged at the bottom of the lower valve body.

Further, the present invention provides a bidirectional pressure adaptive switch valve, wherein the lower valve body is sleeved on the outer side of the upper valve body from bottom to top, and the outer wall of the upper valve body is provided with a locking operation on the upper side of the lower valve body. head.

Further, the present invention is a two-way pressure adaptive switch valve, wherein the valve core includes a guide part and a positioning column that are connected as a whole, and the peripheral wall of the guide part is composed of alternately distributed arc surfaces and planes, and the arc surface is connected to the valve cavity. The peripheral wall of the valve cavity is fitted, and the exhaust passage is formed by the gap between the plane and the peripheral wall of the valve cavity.

Further, the present invention is a bidirectional pressure adaptive switch valve, wherein the upper seal is made of polyether ether ketone, the lower seal is made of rubber, and the upper seal and the lower seal are correspondingly embedded in the positioning column. and on the guide.

Further, the present invention provides a two-way pressure adaptive switch valve, wherein the lower end of the guide portion is a cone, the lower seal is annular and is located in the annular groove provided by the guide portion on the peripheral wall of the cone, and the upper seal is annular. The upper end of the seal is conical and protrudes from the positioning post.

Further, the present invention provides a two-way pressure adaptive switch valve, wherein the exhaust plug cover includes a screw connection part, a pipe connection part and an exhaust part arranged from bottom to top, and the screw connection part is provided with a joint that cooperates with the upper joint. The inner thread, the pipe connection part and the exhaust part are cylindrical, the outer diameter of the pipe connection part is larger than the outer diameter of the exhaust part, and the exhaust port is arranged on the peripheral wall of the exhaust part.

Further, the present invention provides a bidirectional pressure adaptive on-off valve, wherein a plurality of exhaust ports on the exhaust part are uniformly arranged along the circumferential direction, and the exhaust ports are arranged obliquely from the outer bottom to the inner upper.

Compared with the prior art, the two-way pressure adaptive switch valve of the present invention has the following advantages: the present invention provides a valve body, a valve cavity is arranged in the valve body, and an exhaust hole communicating with the valve cavity is correspondingly arranged on the upper and lower sides of the valve cavity. A valve core that can slide up and down is set in the valve cavity, an exhaust passage is set between the valve core and the peripheral wall of the valve cavity, and the upper and lower ends of the valve core are correspondingly provided with the exhaust hole and the intake hole. The upper seal and the lower seal, and a spring is arranged between the valve core and the top wall of the valve cavity. Thus, a bidirectional pressure adaptive switch valve with simple structure, convenient adjustment, strong adaptability, safety and reliability is formed. In practical applications, the on-off valve is installed in the gas delivery pipeline, and the inlet hole is communicated with the inner cavity of the pipeline. When the air pressure in the pipeline is lower than P1, the spring force on the valve core is greater than the aerodynamic force, and the downward pressure The seal is tightly squeezed on the upper port of the intake hole to form a lower seal; when the air pressure in the pipeline rises to P2, the spring force on the valve core is equal to the aerodynamic force and is in the state of opening the intake hole; when the pipe When the air pressure in the road continues to rise, the spring force on the valve core is less than the aerodynamic force and gradually moves upward, and the gas in the pipeline is discharged through the air inlet, exhaust channel and exhaust hole in turn; when the air pressure in the pipeline When it rises to P3, the valve core moves up to the state where the upper seal and the lower port of the exhaust hole fit, that is, the valve core is in the boundary state of closing the exhaust hole, and the gas discharge ends; when the air pressure in the pipeline rises By P4, the upper seal is tightly squeezed against the lower port of the vent to form the upper seal. It can be seen from the above analysis that the present invention enables the on-off valve to have a bidirectional pressure adaptive switch function through the coordinated design of the spring force and the pneumatic force, and is installed in the gas delivery pipeline to realize the medium-pressure exhaust and high-low pressure sealing closure. technical purpose.

A bidirectional pressure adaptive switch valve of the present invention will be described in detail below with reference to the specific embodiments shown in the accompanying drawings.

Description of drawings

1 is a schematic structural diagram of a two-way pressure adaptive on-off valve of the present invention in a low-pressure sealed state;

2 is a schematic structural diagram of a bidirectional pressure adaptive switch valve of the present invention in a high-pressure sealed state;

3 is a front view of a valve core in a two-way pressure adaptive switching valve of the present invention;

4 is a top view of a valve core in a bidirectional pressure adaptive switch valve of the present invention;

Fig. 5 is the A-A view in Fig. 3;

6 is an axonometric view of a valve core in a bidirectional pressure adaptive switching valve of the present invention;

FIG. 7 is a front view of the exhaust blocking cover in a two-way pressure adaptive switching valve of the present invention;

Fig. 8 is the left side view of the exhaust blocking cover in a two-way pressure adaptive switching valve of the present invention;

Fig. 9 is the B-B direction view in Fig. 8;

FIG. 10 is an axonometric view of an exhaust plug cover in a bidirectional pressure adaptive switch valve of the present invention.

Detailed ways

First of all, it should be noted that the orientation words such as upper, lower, left, right, front and rear described in the present invention are only descriptions according to the accompanying drawings, so as to facilitate understanding and do not limit the technical solutions of the present invention and the claimed protection scope. .

As shown in FIG. 1 and FIG. 10 , a specific embodiment of a two-way pressure adaptive switch valve of the present invention includes a valve body 1, a valve cavity 11 is set in the valve body 1, and a valve cavity 11 is correspondingly provided on the upper and lower sides of the valve cavity 11 to communicate with it. The exhaust hole 12 and the intake hole 13 are provided with a valve core 2 that can slide up and down in the valve cavity 11 , an exhaust passage 21 is set between the valve core 2 and the peripheral wall of the valve cavity 11 , and the upper and lower ends of the valve core 2 correspond to An upper sealing member 22 and a lower sealing member 23 are arranged to cooperate with the exhaust hole 12 and the air inlet hole 13 , and a spring 3 is arranged between the valve core 2 and the top wall of the valve cavity 11 .

A two-way pressure adaptive on-off valve is formed through the above structural settings. In practical applications, the on-off valve is installed in the gas delivery pipeline, and the air inlet hole is communicated with the inner cavity of the pipeline. When the air pressure in the pipeline When it is lower than P1, the spring force on the valve core 2 is greater than the aerodynamic force, and the lower seal 23 is tightly squeezed on the upper port of the intake hole 13 to form a lower seal; when the air pressure in the pipeline rises to P2, the valve core The spring force on 2 is equal to the aerodynamic force and is in the boundary state of opening the air inlet 13; when the air pressure in the pipeline continues to rise, the spring force on the valve core 2 is less than the aerodynamic force and gradually moves up, and the gas in the pipeline It is discharged through the intake hole 13, the exhaust channel 21 and the exhaust hole 12 in turn; when the air pressure in the pipeline rises to P3, the valve core 2 moves up to the upper seal 22 and the lower port of the exhaust hole 12. When the air pressure in the pipeline rises to P4, the upper seal 22 is tightly pressed against the lower port of the exhaust hole 12 Form the upper seal. It can be seen from the above analysis that the present invention enables the on-off valve to have a bidirectional pressure adaptive switch function through the coordinated design of the spring force and the aerodynamic force, and is installed in the gas conveying pipeline to realize the medium-pressure exhaust and high-low pressure sealing closure. It has the advantages of simple structure, strong adaptability, safety and reliability.

As an optimized solution, in this specific embodiment, a capping kit composed of a plurality of exhaust caps 4 is also provided, and an exhaust port 41 is provided on the exhaust cap 4, and the exhaust caps 4 of each exhaust cap 4 are exhausted. The cross-sections of the air ports 41 are different from each other. When in use, an exhaust blocking cover 4 is selected and installed on the valve body 1 as required, and the exhaust hole 12 is communicated with the atmosphere through the exhaust port 41 . In the process of medium-pressure exhaust, the moving speed of the valve core 2 is determined by the spring characteristics and aerodynamic force. The aerodynamic force is determined by the positive pressure on the intake side and the back pressure on the outlet side, and the back pressure on the outlet side is determined by the exhaust flow area. By selecting the exhaust plugs 4 with different cross-sections of the exhaust ports 41, the adjustment of the exhaust flow area is realized, thereby realizing the technical purpose of adjusting the moving speed of the valve core, the maximum exhaust pressure and the medium pressure range. The maximum exhaust pressure is The pressure P3 at the end of the gas discharge improves the adaptability and application range of the on-off valve.

As an optimized solution, in order to improve the convenience of disassembly and assembly, in this specific embodiment, an upper joint 14 and a lower joint 15 are correspondingly provided on the upper and lower ends of the valve body 1, so that the upper joint 14 and the lower joint 15 are respectively provided with threads, and the discharge The gas blocking cover 4 is mounted on the upper joint 14 by means of threads. Meanwhile, in this specific embodiment, the valve body 1 is provided with an upper valve body 16 and a lower valve body 17 that are coaxially sleeved and connected by threads, and a sealing ring 18 is arranged between the upper valve body 16 and the lower valve body 17, to ensure the tightness between the two. The upper joint 14 is arranged at the top of the upper valve body 16 , and the lower joint 15 is arranged at the bottom of the lower valve body 17 . This structural arrangement enhances the convenience of disassembly and assembly. In addition, in order to facilitate the screwing operation, in this embodiment, the lower valve body 17 is sleeved on the outer side of the upper valve body 16 from bottom to top, and is arranged on the outer wall of the upper valve body 16 and at the upper side of the lower valve body 17 The operating head 161 is locked. In practical applications, the present invention usually uses a hexagonal head structure for the locking operation head 161 so as to be operated by a wrench, but the locking operation head 161 is not limited to a hexagonal head structure, and can also use a quadrangular prism or other buckle structures.

As an optimized structure, in this specific embodiment, the valve core 2 is provided with a guide portion 24 and a positioning column 25 that are connected as a whole, wherein the peripheral wall of the guide portion 24 is composed of alternately distributed arc surfaces 241 and planes 242, and the arc surfaces 241 and the valve The peripheral wall of the cavity 11 is attached, the exhaust passage 21 is formed by the gap between the plane 242 and the peripheral wall of the valve cavity 11, the spring 3 is sleeved on the positioning column 25, and the upper and lower ends of the spring 3 press against the top wall and the valve cavity 11 correspondingly. on the guide portion 24. The valve core 2 with this arrangement has the advantages of simple structure, easy preparation and smooth movement. In practical applications, the present invention usually makes the upper seal 22 made of polyether ether ketone, and the lower seal 23 made of rubber to ensure the reliability of sealing; the upper seal 22 and the lower seal 23 are correspondingly embedded On the positioning post 25 and the guide portion 24, to improve the integrity and structural stability of the valve core. At the same time, in the present invention, the lower end of the guide portion 24 adopts a conical structure, and the lower seal 23 adopts an annular structure and is embedded in the annular groove provided by the guide portion 24 on the peripheral wall of the cone, so as to enhance the reliability of the lower seal; Therefore, the upper end of the upper seal 22 adopts a conical structure and extends out of the positioning post 25 to enhance the reliability of the upper seal.

As an optimized solution, in this specific embodiment, the exhaust plug cover 4 is provided with a screwing part 42 , a pipe connecting part 43 and an exhausting part 44 arranged from bottom to top, wherein the screwing part 42 is provided with the upper joint 14 . The inner thread of the pipe connection part 43 and the exhaust part 44 are cylindrical, the outer diameter of the pipe connection part 43 is larger than the outer diameter of the exhaust part 44 , and the exhaust port 41 is arranged on the peripheral wall of the exhaust part 44 . The exhaust blocking cover 4 provided in this way has the advantages of simple structure and convenient disassembly and assembly. Under the high and low pressure sealing state, the free end of the hose can be made by sleeving the hose (rubber tube, etc.) on the pipe joint 43 When immersed in the leak detection liquid, the closed state of the on-off valve can be detected by the bubble method, which improves the functionality and practicability of the on-off valve. In practical applications, the present invention usually makes multiple exhaust ports 41 on the exhaust portion 44 evenly arranged along the circumferential direction, and makes each exhaust port 41 inclined from the outer bottom to the inner upper to prevent rainwater and sundries from entering switch valve.

The above embodiments are only descriptions of the preferred embodiments of the present invention, and do not limit the scope of protection of the present invention. Without departing from the design concept of the present invention, those skilled in the art can make various Deformations shall fall within the protection scope determined by the claims of the present invention.

Claims (10)

1. A two-way pressure adaptive switch valve, characterized in that it comprises a valve body (1), a valve cavity (11) is provided in the valve body (1), and the upper and lower sides of the valve cavity (11) are correspondingly provided with a valve communicating with it. The exhaust hole (12) and the air intake hole (13) are provided with a valve core (2) that can slide up and down in the valve cavity (11), and a discharge valve is provided between the valve core (2) and the peripheral wall of the valve cavity (11). In the air passage (21), the upper and lower ends of the valve core (2) are correspondingly provided with an upper sealing member (22) and a lower sealing member (23) which are matched with the exhaust hole (12) and the air inlet hole (13). 2) A spring (3) is arranged between it and the top wall of the valve cavity (11). 2. A bidirectional pressure adaptive switch valve according to claim 1, characterized in that it further comprises a capping kit composed of a plurality of exhaust caps (4), and each exhaust cap (4) corresponds to There are exhaust ports (41) with different cross-sections. When in use, an exhaust plug cover (4) is installed on the valve body (1), and the exhaust hole (12) is communicated with the atmosphere through the exhaust port (41). . 3. A two-way pressure adaptive switch valve according to claim 2, characterized in that the upper and lower ends of the valve body (1) are correspondingly provided with an upper joint (14) and a lower joint (15), and the upper joint ( 14) and the lower joint (15) are respectively provided with threads, and the exhaust plug cover (4) is mounted on the upper joint (14) through the threads. 4. A bidirectional pressure adaptive switch valve according to claim 3, characterized in that the valve body (1) comprises an upper valve body (16) and a lower valve body (16) that are coaxially sleeved and connected by threads 17), a sealing ring (18) is provided between the upper valve body (16) and the lower valve body (17); the upper joint (14) is arranged on the top of the upper valve body (16), and the lower joint (15) ) at the bottom of the lower valve body (17). 5. A two-way pressure adaptive switch valve according to claim 4, characterized in that the lower valve body (17) is sleeved on the outer side of the upper valve body (16) from bottom to top, and the upper valve body (16) A locking operation head (161) is arranged on the outer wall of the lower valve body (17) at the upper position of the lower valve body (17). 6 . The bidirectional pressure adaptive switch valve according to claim 3 , wherein the valve core ( 2 ) comprises a guide portion ( 24 ) and a positioning column ( 25 ) that are connected as a whole, and the guide portion ( 24 ) ) is composed of alternately distributed arc surfaces (241) and planes (242), the arc surfaces (241) are in contact with the peripheral wall of the valve cavity (11), and the exhaust passage (21) consists of a plane (242) and a valve cavity ( 11) The space between the peripheral walls is formed, the spring (3) is sleeved on the positioning column (25), and the upper and lower ends of the spring (3) are pressed against the top wall of the valve chamber (11) and the guide portion (24) correspondingly . 7 . The bidirectional pressure adaptive switch valve according to claim 6 , wherein the upper seal ( 22 ) is made of polyether ether ketone, the lower seal ( 23 ) is made of rubber, and the upper seal ( 23 ) is made of rubber. 8 . The sealing member (22) and the lower sealing member (23) are correspondingly embedded on the positioning column (25) and the guide portion (24). 8 . The bidirectional pressure adaptive switch valve according to claim 7 , wherein the lower end of the guide portion ( 24 ) is a cone, and the lower seal ( 23 ) is annular and located in the guide portion ( 8 . 24) In the annular groove provided on the peripheral wall of the cone, the upper end of the upper seal (22) is a cone and protrudes from the positioning post (25). 9 . The bidirectional pressure adaptive switch valve according to claim 3 , wherein the exhaust plug cover ( 4 ) comprises a screw connection portion ( 42 ) and a pipe connection portion ( 43 ) arranged from bottom to top. 10 . and the exhaust part (44), the screw connection part (42) is provided with an inner thread which is matched with the upper joint (14), the pipe connection part (43) and the exhaust part (44) are cylindrical, and the pipe connection part (43) The outer diameter of the exhaust port (44) is larger than that of the exhaust part (44), and the exhaust port (41) is arranged on the peripheral wall of the exhaust part (44). 10 . The bidirectional pressure adaptive switch valve according to claim 9 , wherein the exhaust ports ( 41 ) on the exhaust portion ( 44 ) are evenly provided with a plurality of exhaust ports along the circumferential direction. 11 . (41) It is inclined from the bottom to the top.

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