Inert gas cut-off control valve

Abstract

The utility model belongs to the technical field of control valves, and particularly relates to an inert gas cut-off control valve which comprises a shell, a valve element, a piston, a spring and an electromagnetic valve, and a first air hole, a second air hole and a third air hole are formed in the shell. In the initial state, under the action of spring force, the front end of the valve element is attached to the inner wall of the shell all the time, the first air hole is in a normally-closed state, and at the moment, the second air hole and the third air hole are in a communicating state; when compressed air is connected, the piston overcomes spring force to move upwards under the action of air pressure, the piston drives the valve element connected with the piston, and therefore the valve port is opened, and the first air hole is communicated with the second air hole at the moment. The inert gas cut-off control valve provided by the utility model is designed by taking a cylinder structure and a gas source as power, is compact in overall structure and light in weight, and can meet the use requirements of small volume and low manufacturing cost of the valve body in a vacuum high-pressure environment.

Description

TECHNICAL FIELD

[0001] The utility model belongs to control valve technical field, concretely relates to a kind of inert gas stop control valve. BACKGROUND

[0002] In automobile manufacturing, lithium battery industry, in the manufacturing process of lithium battery, the process such as battery pack liquid injection vacuum, helium leak detection is indispensable, and now a three-way stop valve is needed, which is related to the on-off of helium and vacuum, and the residual helium in the valve body needs to be removed by positive pressure, which has high technical requirements for the sealing of the valve. The existing solenoid valve is generally divided into direct-acting type and pilot type solenoid valve, and the common one used in vacuum is direct-acting type two-way and three-way solenoid valve. These solenoid valves are only used in low vacuum or positive pressure, and have large power, which cannot meet the use requirements of the three-way stop valve in the above application. Specifically, under different use pressures, the valve port under the same diameter of the same diameter, the higher the use pressure, the greater the reset spring force is needed, and the valve port needs to be opened by electromagnetic force, which means that larger electromagnetic force is needed, that is, the coil power is increased, which will not be conducive to saving the manufacturing cost of the control valve and reducing the size of the control valve. SUMMARY

[0003] The utility model aims at providing a kind of inert gas stop control valve, to solve the use requirements of the existing solenoid valve in the vacuum high pressure environment, such as small valve body, low manufacturing cost.

[0004] To achieve the above purpose, the utility model adopts the following technical solutions:

[0005] The application relates to an inert gas cut-off control valve, which comprises a shell, a valve core, a piston, a spring and an electromagnetic valve, the shell is internally provided with a first cavity and a second cavity, the valve core is arranged in the shell in an axial direction, one end of the valve core extends into the first cavity, the other end of the valve core extends into the second cavity, the piston is arranged at the end of the valve core in the second cavity, the piston divides the second cavity into a third cavity and a fourth cavity, the spring is arranged in the fourth cavity, one end of the spring abuts against the piston, and the other end of the spring abuts against the cavity wall of the fourth cavity, the end of the shell close to the first cavity is provided with a first gas hole and a second gas hole, the first gas hole is opposite to the end surface of the valve core, the second gas hole is staggered with the end surface of the valve core, the side wall of the shell is provided with a third gas hole, the first gas hole, the second gas hole and the third gas hole are communicated with the first cavity, the end of the shell close to the second cavity is provided with a gas control air inlet and the electromagnetic valve, the shell is further provided with a first air passing hole and a second air passing hole, the gas control air inlet is connected with the air inlet end of the electromagnetic valve, one end of the first air passing hole is connected with the first air outlet end of the electromagnetic valve, and the other end of the first air passing hole is communicated with the third cavity, one end of the second air passing hole is connected with the second air outlet end of the electromagnetic valve, and the other end of the second air passing hole is communicated with the fourth cavity.

[0006] Further, the piston comprises a main body and a sealing ring, a sealing groove is arranged on the main body in a ring shape, a limiting convex beam is arranged in the sealing groove, a limiting concave groove is arranged on the sealing ring, the sealing ring is arranged in the sealing groove, and the limiting convex beam and the limiting concave groove are matched and combined.

[0007] Further, the main body and the sealing ring are integrally formed.

[0008] Further, the material of the sealing ring is fluorine rubber.

[0009] Further, the side of the piston facing the valve core is provided with a through hole, the side of the piston away from the valve core is provided with a counterbore, and a connecting screw is arranged, the connecting screw passes through the through hole and is screwed with the valve core.

[0010] Further, the cavity wall of the fourth cavity opposite to the counterbore is provided with a limiting hole, one end of the spring abuts against the counterbore, and the other end of the spring abuts against the limiting hole.

[0011] 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 arranged in the upper shell, and the second cavity is arranged in the lower shell.

[0012] Further, the electromagnetic valve is a pilot electromagnetic valve.

[0013] The utility model discloses an inert gas stop control valve, with cylinder structure and gas source as power design, compact overall structure, lightweight design, can satisfy the use requirement of small valve body volume, low manufacturing cost under vacuum high pressure environment.

[0014] Other features and advantages of the utility model will be described in detail in the subsequent specific embodiment part. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 A perspective view of an inert gas stop control valve provided for the utility model embodiment is provided.

[0016] Fig. 2 A front view of the inert gas stop control valve provided for the utility model embodiment is provided.

[0017] Fig. 3 A right view of the inert gas stop control valve provided for the utility model embodiment is provided.

[0018] Names and labels of components in the drawing are as follows:

[0019] 2. valve core; 3. piston; 4. spring; 5. electromagnetic valve; 6. connecting screw; 11. upper shell; 12. middle shell; 13. lower shell; 14. first cavity; 15. second cavity; 16. first air hole; 17. second air hole; 18. third air hole; 111. air control air inlet; 112. first air hole; 113. second air hole; 114. limit hole; 151. third cavity; 152. fourth cavity; 31. main body; 32. sealing ring. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and advantages of the utility model more clear and obvious, the utility model is further described in detail below by combining with the drawings and examples.It should be understood that the specific examples described here are only used to explain the utility model, and are not used to limit the utility model.

[0021] Please refer to the attached Figs. 1-3As shown, the utility model embodiment provides a kind of inert gas cut-off control valve, including shell, valve core 2, piston 3, spring 4 and electromagnetic valve 5, first cavity 14 and second cavity 15 are equipped in the shell, the valve core 2 is along axial in the shell, valve core 2 one end stretches to the first cavity 14, valve core 2 other end stretches to the second cavity 15, the piston 3 is installed in the valve core 2 in the end of the second cavity 15, and the piston 3 will the second cavity 15 be divided into third cavity 151 and fourth cavity 152, the spring 4 is located in the fourth cavity 152, and the spring 4 one end is on the piston 3, other end is on the cavity wall of the fourth cavity 152, the shell is equipped with first gas hole 16 and second gas hole 17 in the end close to the first cavity 14, the first gas hole 16 is opposite the end surface of the valve core 2, the second gas hole 17 is staggered the end surface of the valve core 2, the sidewall of the shell is equipped with third gas hole 18, the first gas hole 16, second gas hole 17 and third gas hole 18 are all communicated with the first cavity 14, the shell is equipped with air control air inlet 111 and the electromagnetic valve 5 in the end close to the second cavity 15, first air hole 112 and second air hole 113 are also equipped on the shell, the air control air inlet 111 is connected the air inlet of the electromagnetic valve 5, the first air hole 112 one end is connected the first air outlet of the electromagnetic valve 5, other end is communicated the third cavity 151, the second air hole 113 one end is connected the second air outlet of the electromagnetic valve 5, other end is communicated the fourth cavity 152.

[0022] Its working principle is: initial state, under the action of spring 4, the front end of valve core 2 is always attached to the inner wall of shell, so that the first gas hole 16 is always closed, and the second gas hole 17 and the third gas hole 18 are in communication state at this time. In running state, the air control air inlet 111 is connected with the air pipe of compressed air, and the air pressure is generally about 0.4-0.7 MPa; when the electromagnetic valve 5 is not electrified, the compressed air is cut off, and at this time, the valve core 2 remains closed under the elastic force of compression spring 4 (i.e. the front end of valve core 2 is always attached to the inner wall of shell, so that the first gas hole 16 is closed); when the electromagnetic valve 5 is electrified, the compressed air is conducted to the first air hole 112 to enter the third cavity 151, and under the action of air pressure, the piston 3 moves upward against the force of spring 4, and the piston 3 drives the valve core 2 connected thereto to open the valve port, so that the first gas hole 16 and the second gas hole 17 are in communication.

[0023] Therefore, the inert gas cut-off control valve of the utility model is designed with cylinder structure and air source as power, has compact overall structure and lightweight design, and can meet the use requirements of small valve body volume and low manufacturing cost in vacuum high-pressure environment.

[0024] Specifically, the piston 3 comprises a main body 31 and a sealing ring 32, the main body 31 is provided with a sealing groove, a limiting convex beam is arranged in the sealing groove, the sealing ring 32 is provided with a limiting concave groove, the sealing ring 32 is arranged in the sealing groove, and the limiting convex beam is matched and embedded with the limiting concave groove. Further, the main body 31 and the sealing ring 32 are integrally formed. The material of the sealing ring 32 is fluorine rubber. The main body 31 and the sealing ring 32 are integrally formed, the gas permeability is small, and the sealing performance is good; the material of the sealing ring 32 is fluorine rubber (FKM), the gas permeability is small, and the inert gas sealing performance is effectively improved.

[0025] The piston 3 is provided with a through hole on the side facing the valve core 2, and is provided with a counterbore on the side away from the valve core 2, and further comprises a connecting screw 6, the connecting screw 6 passes through the through hole from the counterbore and is screwed with the valve core 2. Further, the counterbore is opposite the cavity wall of the fourth cavity 152, and the limiting hole 114 is arranged on the cavity wall, one end of the spring 4 abuts against the counterbore, and the other end of the spring 4 abuts against the limiting hole 114. The limiting hole 114 and the counterbore are used for positioning the spring 4 respectively, so that the counterbore realizes double functions, and the structure is simpler.

[0026] The shell comprises an upper shell 11, a middle shell 12 and a lower shell 13, the upper shell 11, the middle shell 12 and the lower shell 13 are connected in sequence from top to bottom, the first cavity 14 is located in the upper shell 11, and the second cavity 15 is located in the lower shell 13. Wherein, the shell structure of the upper shell 11, the middle shell 12 and the lower shell 13 can facilitate the installation and disassembly of the valve core 2 and the piston 3, the stroke of the whole valve core 2 is short, the reversing volume is small, the vacuum in the cavity is used, the vacuum time is reduced, and the efficiency is improved.

[0027] The electromagnetic valve 5 is a pilot electromagnetic valve 5.

[0028] In summary, the inert gas cut-off control valve is designed by taking the air cylinder structure and the air source as power, the overall structure is compact, and the lightweight design can meet the use requirements of small valve body volume and low manufacturing cost in a vacuum and high pressure environment.

[0029] The technical features of the above-mentioned embodiments can be combined arbitrarily, in order to make the description simple, not all possible combinations of the technical features in the above-mentioned embodiments are described, however, as long as the combinations of the technical features do not exist contradictory, it should be considered that it is within the scope of the present application.

[0030] The above-described embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but cannot be understood as a limitation on the patent scope of the present application. It should be noted that, for ordinary skilled persons in the art, without departing from the concept of the present application, several modifications and improvements can be made, which all belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

[0031] The above-described embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but cannot be understood as a limitation on the patent scope of the present application. It should be noted that, for ordinary skilled persons in the art, without departing from the concept of the present application, several modifications and improvements can be made, which all belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. An inert gas shutoff control valve characterized by, The utility model relates to a kind of solenoid valve, including shell, valve core, piston, spring and solenoid valve, first cavity and second cavity are equipped in the shell, the valve core is equipped in the shell along axial direction, valve core one end reaches the first cavity, valve core other end reaches the second cavity, the piston is installed in the valve core end in the second cavity, and the piston divides the second cavity into third cavity and fourth cavity, the spring is located in the fourth cavity, and the spring one end is on the piston, the other end is on the cavity wall of the fourth cavity, the first air hole and the second air hole are equipped in the end of the shell close to the first cavity, the first air hole is directly opposite the end surface of the valve core, the second air hole is staggered the end surface of the valve core, the third air hole is equipped in the lateral wall of the shell, the first air hole, second air hole and third air hole are all communicated with the first cavity, air control gas inlet and solenoid valve are equipped in the end of the shell close to the second cavity, first air hole and second air hole are equipped on the shell, the air control gas inlet is connected with the air inlet end of the solenoid valve, the first air hole one end is connected with the first air outlet end of the solenoid valve, the other end is communicated with the third cavity, the second air hole one end is connected with the second air outlet end of the solenoid valve, the other end is communicated with the fourth cavity.

2. The inert gas shutoff control valve according to claim 1, wherein The piston includes a main body and a sealing ring, the main body has a sealing groove, the sealing groove has a limiting convex beam, the sealing ring has a limiting concave groove, the sealing ring is located in the sealing groove, and the limiting convex beam is matched with the limiting concave groove.

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

4. The noble gas shutoff control valve according to claim 3, wherein The sealing ring is made of fluorine rubber.

5. The noble gas shutoff control valve according to claim 1, wherein The piston has a through hole on one side facing the valve core and a counterbore on the other side away from the valve core, and a connecting screw is screwed with the valve core through the counterbore and the through hole.

6. An inert gas shut-off control valve according to claim 5, wherein The counterbore has a limiting hole on the cavity wall of the fourth cavity, and the spring is located in the counterbore and the limiting hole.

7. The noble gas shutoff control valve according to claim 1, wherein The shell includes an upper shell, a middle shell and a lower shell, the upper shell, the middle shell and the lower shell are connected from top to bottom, the first cavity is located in the upper shell, and the second cavity is located in the lower shell.

8. The noble gas shutoff control valve according to claim 1, wherein The solenoid valve is a pilot solenoid valve.

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