CN223953275U

CN223953275U - Inert gas stop control valve

Info

Publication number: CN223953275U
Application number: CN202520662785.2U
Authority: CN
Inventors: 金鑫; 侯颖阳; 杨旺
Original assignee: Hitop Industrial Holdings Co ltd
Current assignee: Hitop Industrial Holdings Co ltd
Priority date: 2025-04-09
Filing date: 2025-04-09
Publication date: 2026-02-27
Anticipated expiration: 2035-04-09

Abstract

The utility model belongs to the technical field of control valves, and particularly relates to an inert gas stop control valve which comprises a shell, a valve core, a piston, a spring and an electromagnetic valve, wherein a first air hole, a second air hole and a third air hole are formed in the shell. When compressed air is connected, the piston moves upwards against the spring force under the action of air pressure, and the piston drives the valve core connected with the piston to open the valve port, and the first air hole is communicated with the second air hole. The inert gas stop control valve is designed by taking the cylinder structure and the air source as power, has compact overall structure and light weight, and can meet the use requirements of small volume and low manufacturing cost of a valve body in a vacuum high-pressure environment.

Description

Inert gas stop control valve

Technical Field

The utility model belongs to the technical field of control valves, and particularly relates to an inert gas stop control valve.

Background

In the automobile manufacturing and lithium battery industry, in the lithium battery manufacturing process, the procedures of battery pack liquid injection vacuumizing, helium leakage detection and the like are indispensable, a three-way stop valve is needed, the three-way stop valve is applied to on-off of helium and vacuum, and residual helium in a valve body is needed to be removed through positive air pressure, so that the high technical requirement on sealing of the valve is achieved. The conventional electromagnetic valves are generally divided into direct-acting type electromagnetic valves and pilot-operated type electromagnetic valves, and the conventional electromagnetic valves are direct-acting type two-way electromagnetic valves and three-way electromagnetic valves which are used in vacuum, are only used in low vacuum or positive pressure, have high power and cannot meet the use requirements of the three-way stop valve under the application. Specifically, under different use pressures, the higher the use pressure of the valve port is under the same caliber and the higher the use pressure is, the larger the reset spring force is needed, and the valve port is opened by electromagnetic force, which means that the larger electromagnetic force is needed, namely, the realization of increasing the coil power is needed, thus being unfavorable for saving the manufacturing cost of the control valve and reducing the volume of the control valve.

Disclosure of utility model

The utility model aims to provide an inert gas stop control valve, and aims to solve the problem that the existing electromagnetic valve cannot simultaneously meet the use requirements of small volume and low manufacturing cost of a valve body under a vacuum high-pressure environment.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

The utility model provides an inert gas stop control valve, includes casing, case, piston, spring and solenoid valve, be equipped with first cavity and second cavity in the casing, the case is located along the axial in the casing, case one end stretches to first cavity, the case other end stretches to the second cavity, the piston install in the case is located the tip of second cavity, just the piston will the second cavity is cut apart into third cavity and fourth cavity, the spring is located the fourth cavity, just spring one end support in on the piston, the other end support in on the cavity wall of fourth cavity, the one end of casing be close to first cavity is equipped with first gas pocket and second gas pocket, first gas pocket is just to the terminal surface of case, the second gas pocket is staggered the terminal surface of case, the lateral wall of casing be equipped with the third gas pocket, second gas pocket and third gas pocket all with first cavity intercommunication, the one end of casing be close to the second cavity be equipped with pneumatic control and air inlet, the other end support in on the cavity, the other end support in the first gas pocket is equipped with the air inlet, the second air inlet is connected to the solenoid valve, the other end is connected to the first end, the other end is connected to the solenoid valve.

Further, the piston comprises a main body and a sealing ring, a sealing groove is arranged on the main body in a surrounding mode, a limiting convex beam is arranged in the sealing groove, a limiting groove is formed in the sealing ring, the sealing ring is arranged in the sealing groove, and the limiting convex beam is in fit with the limiting groove.

Further, the main body and the sealing ring are integrally formed.

Further, the sealing ring is made of fluororubber.

Further, a through hole is formed in one side, facing the valve core, of the piston, a countersunk hole is formed in one side, facing away from the valve core, of the piston, and the connecting screw penetrates through the through hole from the countersunk hole and is in threaded connection with the valve core.

Further, a limiting hole is formed in the cavity wall, opposite to the counter sunk hole, of the fourth cavity, one end of the spring abuts against the counter sunk hole, and the other end of the spring abuts against the limiting hole.

Further, the shell comprises an upper shell, a middle shell and a lower shell, the upper shell, the middle shell and the lower shell are sequentially connected from top to bottom, the first cavity is located on the upper shell, and the second cavity is located on the lower shell.

Further, the solenoid valve is set as a pilot solenoid valve.

The inert gas stop control valve is designed by taking the cylinder structure and the air source as power, has compact overall structure and light weight, and can meet the use requirements of small volume and low manufacturing cost of a valve body in a vacuum high-pressure environment.

Additional features and advantages of the utility model will be set forth in the detailed description which follows.

Drawings

FIG. 1 is a perspective view of an inert gas shutoff control valve according to an embodiment of the present utility model;

FIG. 2 is a front cross-sectional view of an inert gas shutoff control valve according to an embodiment of the present utility model;

Fig. 3 is a right side cross-sectional view of an inert gas shutoff control valve according to an embodiment of the present utility model.

The names and the labels of the components in the figure are as follows:

2. Valve core, piston, spring, electromagnetic valve, connecting screw, upper shell, middle shell, lower shell, first cavity, second cavity, first air hole, second air hole, third air hole, air control air inlet, first air hole, second air hole, limiting hole, third cavity, fourth cavity, main body and sealing ring.

Detailed Description

The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

Referring to fig. 1-3, an embodiment of the present utility model provides an inert gas stop control valve, which includes a housing, a valve core 2, a piston 3, a spring 4 and an electromagnetic valve 5, wherein a first cavity 14 and a second cavity 15 are disposed in the housing, the valve core 2 is axially disposed in the housing, one end of the valve core 2 extends to the first cavity 14, the other end of the valve core 2 extends to the second cavity 15, the piston 3 is mounted at the end of the valve core 2 located at the end of the second cavity 15, the second cavity 15 is divided into a third cavity 151 and a fourth cavity 152 by the piston 3, the spring 4 is disposed in the fourth cavity 152, one end of the spring 4 abuts against the piston 3, the other end abuts against the cavity wall of the fourth cavity 152, one end of the housing close to the first cavity 14 is provided with a first air hole 16 and a second air hole 17, the other end of the valve core 2 is staggered from the second air hole 17, the side wall of the housing is provided with a third air hole 18, the other end of the housing is provided with a second air hole 16 and a second air hole 17, the other end of the valve core 2 is connected with the electromagnetic valve 5, the other end of the electromagnetic valve is connected with the first air hole 112 and the other end of the electromagnetic valve 5, the electromagnetic valve is connected with the other end of the electromagnetic valve 5, and the electromagnetic valve is connected with the other end of the electromagnetic valve 111, and the electromagnetic valve is connected with the electromagnetic valve end of the electromagnetic valve 112, and the electromagnetic valve has the electromagnetic valve 112.

The working principle is that in the initial state, the front end of the valve core 2 is always attached to the inner wall of the shell under the action of the spring 4, so that the first air hole 16 is in a normally closed state, and the second air hole 17 and the third air hole 18 are in a communication state. In the operation state, the pneumatic control air inlet 111 is connected with an air pipe of compressed air, the air pressure of the air pipe is generally about 0.4-0.7 MPa, when the electromagnetic valve 5 is in a state of being not electrified, the compressed air is cut off, the valve core 2 is kept in a closed state under the elastic force of the compression spring 4 (namely, the front end of the valve core 2 is always attached to the inner wall of the shell, so that the first air hole 16 is in a closed state), after the electromagnetic valve 5 is electrified, the compressed air is conducted to the first air passing hole 112 to enter the third cavity 151, the piston 3 moves upwards against the force of the spring 4 under the action of the air pressure, and the piston 3 drives the valve core 2 connected with the air passing hole to open a valve port, so that the first air hole 16 is communicated with the second air hole 17.

Therefore, the inert gas stop control valve is designed by taking the cylinder structure and the air source as power, has compact overall structure and light weight, and can meet the use requirements of small volume and low manufacturing cost of the valve body in a vacuum high-pressure environment.

Specifically, the piston 3 includes main part 31 and sealing washer 32, the ring is equipped with the seal groove on the main part 31, be equipped with spacing protruding roof beam in the seal groove, be equipped with spacing recess on the sealing washer 32, the sealing washer 32 is located in the seal groove, spacing protruding roof beam with spacing recess looks adaptation gomphosis. Further, the main body 31 and the seal ring 32 are integrally formed. The seal ring 32 is made of fluororubber. The main body 31 and the sealing ring 32 are integrally formed, so that the gas permeation is less, the sealing performance is good, the material of the sealing ring 32 is Fluororubber (FKM), the sealing ring has the characteristic of low air permeability, and the sealing performance of inert gas is effectively improved.

The piston 3 is provided with a through hole on one side facing the valve core 2, a countersunk hole is formed on one side facing away from the valve core 2, and the valve further comprises a connecting screw 6, and the connecting screw 6 passes through the through hole from the countersunk hole and is in threaded connection with the valve core 2. Further, a limiting hole 114 is provided on the wall of the fourth cavity 152 opposite to the counter bore, one end of the spring 4 abuts against the counter bore, and the other end of the spring 4 abuts against the limiting hole 114. The limiting holes 114 and the counter sunk holes are used for positioning the spring 4 respectively, so that the counter sunk holes realize double functions and the structure is simpler.

The shell comprises an upper shell 11, a middle shell 12 and a lower shell 13, wherein the upper shell 11, the middle shell 12 and the lower shell 13 are sequentially connected from top to bottom, the first cavity 14 is positioned on the upper shell 11, and the second cavity 15 is positioned on the lower shell 13. The valve core 2 and the piston 3 can be conveniently installed and detached by adopting the shell structures of the upper shell 11, the middle shell 12 and the lower shell 13, meanwhile, the whole valve core 2 is short in stroke and small in reversing volume, and is used for vacuumizing in a cavity, so that vacuumizing time is shortened, and efficiency is improved.

The solenoid valve 5 is a pilot solenoid valve 5.

In summary, the inert gas stop control valve is designed by taking the cylinder structure and the air source as power, has compact overall structure and light weight design, and can meet the use requirements of small volume and low manufacturing cost of the valve body in a vacuum high-pressure environment.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The foregoing examples illustrate only a few embodiments of the utility model and are described in detail herein without thereby limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.

Claims

1. An inert gas shut-off control valve, characterized in that it comprises a housing, a valve core, a piston, a spring, and a solenoid valve; the housing has a first cavity and a second cavity; the valve core is axially disposed within the housing, with one end extending into the first cavity and the other end extending into the second cavity; the piston is mounted on the end of the valve core located in the second cavity, and the piston divides the second cavity into a third cavity and a fourth cavity; the spring is located in the fourth cavity, with one end abutting against the piston and the other end abutting against the cavity wall of the fourth cavity; the end of the housing near the first cavity has a first vent and a second vent. The housing has a first air hole facing the end face of the valve core, a second air hole offset from the end face of the valve core, and a third air hole on the side wall of the housing. The first, second, and third air holes are all connected to the first cavity. The housing has a pneumatic inlet and the solenoid valve at one end near the second cavity. The housing also has a first and a second air passage. The pneumatic inlet is connected to the inlet end of the solenoid valve. One end of the first air passage is connected to the first outlet end of the solenoid valve and the other end is connected to the third cavity. One end of the second air passage is connected to the second outlet end of the solenoid valve and the other end is connected to the fourth cavity.

2. An inert gas shut-off control valve according to claim 1, characterized in that the piston includes a body and a sealing ring, the body is provided with a sealing groove, the sealing groove is provided with a limiting protrusion, the sealing ring is provided with a limiting groove, the sealing ring is disposed in the sealing groove, and the limiting protrusion and the limiting groove are adapted to fit together.

3. The inert gas shut-off control valve according to claim 2, characterized in that the main body and the sealing ring are integrally formed.

4. The inert gas shut-off control valve according to claim 3, wherein the sealing ring is made of fluororubber.

5. An inert gas shut-off control valve according to claim 1, characterized in that the piston has a through hole on the side facing the valve core and a countersunk hole on the side facing away from the valve core, and further includes a connecting screw, the connecting screw passing through the through hole from the countersunk hole and screwed to the valve core.

6. An inert gas shut-off control valve according to claim 5, characterized in that a limiting hole is provided on the cavity wall of the fourth cavity opposite to the countersunk hole, one end of the spring abuts against the countersunk hole, and the other end of the spring abuts against the limiting hole.

7. An inert gas shut-off control valve according to claim 1, characterized in that the housing comprises an upper housing, a middle housing, and a lower housing, the upper housing, the middle housing, and the lower housing being connected sequentially from top to bottom, the first cavity being located in the upper housing, and the second cavity being located in the lower housing.

8. An inert gas shut-off control valve according to claim 1, wherein the solenoid valve is configured as a pilot solenoid valve.