A leak-proof on / off valve

Abstract

The utility model relates to a leakproof opening valve. The leakproof opening valve includes a valve body, a valve core assembly, a sealing washer and a spring assembly. The valve core assembly is arranged in the valve body and can move along the axial direction of the valve body. The sealing washer is arranged at the bottom end of the valve core assembly and protrudes from the valve core assembly. The spring assembly is arranged in the valve body and is fixedly connected with the valve body and the valve core assembly. The scheme provided in the application can realize the self-sealing function. When the steel cylinder is replaced, the air can be effectively prevented from entering the filling pipeline, so that the step of discharging air is not needed after the cylinder is replaced, and the whole operation process is more simple. In addition, since the air in the pipeline does not need to be discharged, the problem of refrigerant leakage is effectively avoided, which not only reduces the waste of refrigerant but also reduces the pollution of air, effectively improving the convenience and environmental protection.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and in particular to a leak-proof opening valve. Background Technology

[0002] An opening valve is a core device used to control the flow and shut-off of fluid media (gas, liquid) in containers or pipelines. By adjusting the opening and closing of the valve core, it can achieve on-demand output of fluid and ensure the sealing and safety of fluid when not in use.

[0003] Taking the common R134 refrigerant small canisters as an example, the valves currently used to open R134 refrigerant small canisters on the market have obvious defects in actual filling scenarios. For example, when the first canister of refrigerant is filled and the second canister is replaced, air will enter the filling pipeline. Therefore, in order to ensure the filling quality, the air in the pipeline must be purged after each canister replacement. However, the purging process is accompanied by the loss of refrigerant, which not only increases the operation steps and the inconvenience of use, but also causes refrigerant waste and does not meet environmental protection requirements.

[0004] Therefore, there is an urgent need to design a leak-proof opening valve that can achieve a self-sealing function, effectively preventing air from entering the filling pipeline when changing cylinders, thus eliminating the need for air purging after cylinder replacement and making the entire operation process simpler. In addition, since there is no need to purge air from the pipeline, the problem of refrigerant leakage is effectively avoided, which reduces refrigerant waste and air pollution, effectively improving convenience and environmental protection. Summary of the Invention

[0005] To overcome the problems existing in related technologies, this application provides a leak-proof opening valve that can achieve a self-sealing function. When changing the cylinder, it effectively prevents air from entering the filling pipeline, so that there is no need to perform the air purging step after changing the cylinder, making the whole operation process simpler. In addition, since there is no need to purge the air in the pipeline, the problem of refrigerant leakage is effectively avoided, which reduces refrigerant waste and air pollution, effectively improving convenience and environmental protection.

[0006] This application provides a leak-proof opening valve, including a valve body, a valve core assembly, a sealing gasket, and a spring assembly. The valve core assembly is disposed within the valve body and is movable along the axial direction of the valve body. The sealing gasket is disposed at the bottom end of the valve core assembly and protrudes from the valve core assembly, for tightly fitting with the cylinder mouth to achieve a sealing effect. The spring assembly is disposed within the valve body and is fixedly connected to both the valve body and the valve core assembly, for controlling the relative position of the valve body and the valve core assembly to achieve connection or disconnection of the pipeline channel.

[0007] In a preferred embodiment of this application, the valve body includes a valve handle, an upper valve body, and a lower valve body; the valve handle, the upper valve body, and the lower valve body are arranged sequentially from top to bottom, and the bottom end of the valve handle is connected to the top end of the upper valve body, and the bottom end of the upper valve body is connected to the top end of the lower valve body.

[0008] In a preferred embodiment of this application, the upper part of the valve body includes a connecting ring; the inner sidewalls at both ends of the connecting ring are provided with internal threads; the bottom end of the valve body handle and the top end of the lower part of the valve body are respectively provided with external threads that are adapted to the internal threads.

[0009] In a preferred embodiment of this application, the upper part of the valve body further includes a circular ring and a guide hole; the circular ring is horizontally disposed within the connecting ring body and integrally connected to the connecting ring body, and the cross-section after connection is H-shaped; the guide hole is disposed on the circular ring and located at the center of the circular ring, and the hole wall of the guide hole is in contact with the valve core assembly.

[0010] In a preferred embodiment of this application, the valve core assembly includes a valve seat and a valve core; the valve seat is disposed in the inner cavity of the lower part of the valve body, and the outer side wall of the valve seat is in contact with the inner side wall of the lower part of the valve body, and can move up and down along the inner side wall of the lower part of the valve body; the upper part of the valve core passes through the guide hole and is disposed in the valve body, and can move axially relative to the guide hole; the lower part of the valve core is inserted into the valve seat.

[0011] In a preferred embodiment of this application, a first sealing ring is further included; a first sealing groove is provided on the inner sidewall of the valve seat; the first sealing ring is disposed in the first sealing groove to achieve a seal between the valve core and the valve seat.

[0012] In a preferred embodiment of this application, a second sealing ring and a third sealing ring are further included; a second sealing groove and a third sealing groove are provided on the outer side wall of the valve seat; the second sealing groove and the third sealing groove are arranged sequentially from top to bottom; the second sealing ring is disposed in the second sealing groove; and the third sealing ring is disposed in the third sealing groove.

[0013] In a preferred embodiment of this application, the spring assembly includes a first spring and a second spring; both the first spring and the second spring are disposed within the valve body; the top end of the first spring is connected to the valve body handle, and the bottom end is connected to the top end of the valve core; the top end of the second spring is connected to the upper part of the valve body, and the bottom end is connected to the top end of the valve seat.

[0014] In a preferred embodiment of this application, the valve core includes a first cylinder, a second cylinder, a third cylinder, and a spike; the first cylinder, the second cylinder, the third cylinder, and the spike are arranged sequentially from top to bottom and are integrally formed; wherein, the bottom diameter of the first cylinder is larger than the diameter of the guide hole; the bottom diameter of the second cylinder is adapted to the guide hole, and the second cylinder is in contact with the hole wall of the guide hole; the bottom diameter of the third cylinder is smaller than the diameter of the guide hole and is located below the guide hole; the bottom end of the spike is conical and used to pierce the mouth of the steel cylinder.

[0015] The technical solution provided in this application has the following beneficial effects: The leak-proof opening valve of this application includes a valve body, a valve core assembly, a sealing gasket, and a spring assembly. By providing a guide hole on the valve body, the valve core assembly can move stably and accurately under the precise guidance of the guide hole. By providing the first sealing ring, the second sealing ring, and the third sealing ring, the sealing performance between the valve seat and the valve core, as well as between the valve seat and the valve body, is effectively improved, thereby effectively preventing refrigerant from leaking out from the gap inside the valve body, and greatly improving the overall sealing performance of the leak-proof opening valve. Through the coordinated action of the first spring and the second spring, the relative position of the valve core assembly and the valve body can be precisely controlled, realizing reliable connection or disconnection of the pipeline channel. Compared with existing technologies, the solution provided in this application can achieve a self-sealing function, effectively preventing air from entering the filling pipeline when changing the cylinder, thus eliminating the need for air venting after cylinder replacement, making the entire operation process simpler; in addition, since there is no need to vent air from the pipeline, the problem of refrigerant leakage is effectively avoided, which reduces refrigerant waste and air pollution, effectively improving convenience and environmental friendliness.

[0016] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0017] The above and other objects, features and advantages of this application will become more apparent from the more detailed description of exemplary embodiments thereof in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments thereof.

[0018] Figure 1 This is a schematic diagram of the anti-leakage opening valve shown in the embodiments of this application; Figure 2 This is a schematic diagram of the structure of the leak-proof opening valve when it is turned toward the gas cylinder, as shown in the embodiments of this application; Figure 3This is a schematic diagram of the structure of the anti-leakage opening valve that forms a passage after being screwed to the bottom, as shown in the embodiment of this application.

[0019] Explanation of reference numerals in the attached figures: 1. Valve body; 11. Valve handle; 12. Upper part of valve body; 121. Connecting ring; 122. Circular ring; 123. Guide hole; 13. Lower part of valve body; 2. Valve core assembly; 21. Valve seat; 211. First sealing groove; 212. Second sealing groove; 213. Third sealing groove; 22. Valve core; 221. First cylinder; 222. Second cylinder; 223. Third cylinder; 224. Spike; 3. Sealing gasket; 4. Spring assembly; 41. First spring; 42. Second spring; 5. Cylinder neck; 6. First sealing ring; 7. Second sealing ring; 8. Third sealing ring. Detailed Implementation

[0020] Preferred embodiments of the present application will now be described in more detail with reference to the accompanying drawings. While preferred embodiments of the present application are shown in the drawings, it should be understood that the present application may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to make the present application more thorough and complete, and to fully convey the scope of the present application to those skilled in the art.

[0021] The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The singular forms “a,” “the,” and “the” used in this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0022] It should be understood that although the terms "first," "second," "third," etc., may be used in this application to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this application, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0023] Currently available valves for opening small R134 refrigerant cylinders have significant drawbacks in actual refueling scenarios. For example, when the first cylinder is refueled and the second cylinder is replaced, air enters the refueling line. Therefore, to ensure refueling quality, the air in the line must be vented after each cylinder replacement. However, this venting process results in refrigerant loss, which not only increases the number of steps and the inconvenience of use but also wastes refrigerant and does not meet environmental protection requirements.

[0024] To address the aforementioned issues, this application provides a leak-proof opening valve that achieves a self-sealing function. When replacing a gas cylinder, it effectively prevents air from entering the filling pipeline, thus eliminating the need for air venting after cylinder replacement and simplifying the entire operation process. Furthermore, since there is no need to vent air from the pipeline, it effectively avoids refrigerant leakage, reducing refrigerant waste and air pollution, thereby improving convenience and environmental friendliness.

[0025] The technical solutions of the embodiments of this application are described in detail below with reference to the accompanying drawings. Example 1

[0026] Please see Figures 1-3 The leak-proof opening valve of this application includes a valve body 1, a valve core assembly 2, a sealing gasket 3, and a spring assembly 4. The valve body 1 is the core pressure-bearing component, and its internal cavity accommodates the valve core assembly 2 and the spring assembly 4, forming a flow channel for fluid media (such as refrigerant, but not limited to refrigerant). The valve core assembly 2 is disposed within the valve body 1 and is axially movable along the valve body 1. The movement of the valve core assembly 2 controls the flow and shut-off of the fluid media. The sealing gasket 3 is disposed at the bottom end of the valve core assembly 2 and protrudes from it, for tightly fitting against the cylinder opening 5 to achieve a sealing effect and prevent leakage of the fluid media from the cylinder opening 5. The spring assembly 4 is disposed within the valve body 1 and is fixedly connected to both the valve body 1 and the valve core assembly 2, for controlling the relative position of the valve core assembly 2 and the valve body 1 to connect or disconnect the pipeline channel. In actual use, when the gas cylinder is connected to the leak-proof valve, the valve core assembly 2 is in a suitable position under the action of the spring assembly 4, so that the pipeline channel is connected and the fluid medium can flow normally. When the gas cylinder is replaced and the gas cylinder is separated from the valve, the elasticity of the spring assembly 4 will cause the valve core assembly 2 to move quickly to the sealing position, realize the self-sealing function, effectively prevent air from entering the charging pipeline, and reduce refrigerant leakage and waste.

[0027] Specifically, the valve body 1 includes a valve handle 11, an upper valve body 12, and a lower valve body 13. The valve handle 11, the upper valve body 12, and the lower valve body 13 are arranged sequentially from top to bottom. The bottom end of the valve handle 11 is connected to the top end of the upper valve body 12, and the bottom end of the upper valve body 12 is connected to the top end of the lower valve body 13, making the overall valve structure compact and easy to operate. For example, the upper part 12 of the valve body includes a connecting ring 121, a circular ring 122, and a guide hole 123. The inner walls of both ends of the connecting ring 121 are provided with internal threads. The bottom end of the valve body handle 11 and the top end of the lower part 13 of the valve body are respectively provided with external threads adapted to the internal threads. This threaded connection facilitates the assembly and disassembly of the valve. Furthermore, when refrigerant needs to be added, the user can rotate the valve body handle 11 clockwise to apply downward pressure to the upper part 12 and the lower part 13 of the valve body. With the cylinder mouth 5 always tightly fitted to the sealing gasket 3, the valve core assembly 2 can move relatively into the valve body 1. The circular ring 122 is horizontally disposed within the connecting ring 121 and integrally connected to it. The resulting cross-section is H-shaped, effectively enhancing the structural strength of the upper part 12 of the valve body and enabling it to better withstand medium pressure. The guide hole 123 is disposed on the ring 122 and located at the center of the ring 122. The hole wall of the guide hole 123 is in contact with the valve core assembly 2, providing precise guidance for the movement of the valve core assembly 2 and ensuring the stability and accuracy of the movement of the valve core assembly 2.

[0028] The valve core assembly 2 includes a valve seat 21 and a valve core 22. The valve seat 21 is disposed in the inner cavity of the lower part 13 of the valve body, and the outer side wall of the valve seat 21 is in contact with the inner side wall of the lower part 13 of the valve body, and can move up and down along the inner side wall of the lower part 13 of the valve body, so that the valve seat 21 can move stably within the lower part 13 of the valve body. The upper part of the valve core 22 passes through the guide hole 123 and is disposed in the valve body 1, and can move axially relative to the guide hole 123. The lower part of the valve core 22 is inserted into the valve seat 21. For example, the valve core 22 includes a first cylinder 221, a second cylinder 222, a third cylinder 223, and a spike 224; the first cylinder 221, the second cylinder 222, the third cylinder 223, and the spike 224 are arranged sequentially from top to bottom and are integrally formed; wherein, the bottom diameter of the first cylinder 221 is larger than the diameter of the guide hole 123, which is used to prevent the valve core 22 from coming out of the guide hole 123; the bottom diameter of the second cylinder 222 is larger than the diameter of the guide hole 123. The diameter of the second cylinder 222 is adapted to the guide through hole 123, and the second cylinder 222 fits against the hole wall of the guide through hole 123 to ensure the smooth movement and sealing of the valve core 22 within the guide through hole 123; the bottom diameter of the third cylinder 223 is smaller than the hole diameter of the guide through hole 123 and is located below the guide through hole 123, for connecting the spike 224; the bottom end of the spike 224 is conical, for piercing the cylinder mouth 5, thereby achieving connection with the cylinder.

[0029] Meanwhile, to further improve the sealing performance, the leak-proof opening valve of this application is also provided with a first sealing ring 6, a second sealing ring 7, and a third sealing ring 8. A first sealing groove 211 is provided on the inner side wall of the valve seat 21, and a second sealing groove 212 and a third sealing groove 213 are provided on the outer side wall of the valve seat 21. The first sealing ring 6 is disposed within the first sealing groove 211 to achieve a seal between the valve core 22 and the valve seat 21, preventing refrigerant from leaking out from the gap between the valve core 22 and the valve seat 21. The second sealing groove 212 and the third sealing groove 213 are arranged sequentially from top to bottom, with the second sealing ring 7 disposed within the second sealing groove 212 and the third sealing ring 8 disposed within the third sealing groove 213. This further enhances the sealing performance between the valve seat 21 and the lower part 13 of the valve body, preventing refrigerant from leaking out from the gap between the valve seat 21 and the lower part 13 of the valve body, and ensuring the sealing effect of the leak-proof opening valve during operation.

[0030] Furthermore, the spring assembly 4 includes a first spring 41 and a second spring 42; both the first spring 41 and the second spring 42 are disposed within the valve body 1, and the top end of the first spring 41 is connected to the valve body handle 11, and the bottom end is connected to the top end of the valve core 22. When the valve body handle 11 is rotated clockwise to the end point (during this process, the first spring 41 is compressed), under the action of the rebound force of the first spring 41, the valve core assembly 2 is driven to move downward, thereby realizing the passage between the cylinder and the pipeline, and then the refrigerant is added. The top end of the second spring 42 is connected to the upper part 12 of the valve body, and the bottom end is connected to the top end of the valve seat 21. When the valve body handle 11 is turned clockwise, the rebound force of the second spring 42 ensures that the sealing gasket 3 remains tightly fitted to the cylinder opening 5. Furthermore, when the valve body 1 separates from the cylinder opening 5, the rebound force of the second spring 42 quickly pushes the valve core assembly 2 downwards until the valve seat 21 and the lower part 13 of the valve body are back to their initial sealing state. Through the coordinated action of the first spring 41 and the second spring 42, the relative position of the valve core assembly 2 and the valve body 1 can be more precisely controlled, achieving reliable connection or disconnection of the pipeline passage, thereby effectively preventing air from entering the charging pipeline and reducing refrigerant leakage and waste.

[0031] Working principle: When connecting the gas cylinder to the leak-proof valve for refrigerant charging, first align the gas cylinder opening 5 with the spike 224 of the valve core 22, ensuring the sealing gasket 3 fits tightly against the gas cylinder opening 5. Then, rotate the valve body handle 11 clockwise, applying downward pressure to the upper part 12 and lower part 13 of the valve body. Under the action of the gas cylinder opening 5 (which remains stationary), the valve seat 21 causes the valve core 22 to move into the valve body 1 (i.e., upwards). During this process, the first... Spring 41 is compressed, the second spring 42 is compressed, and the sealing gasket 3 remains tightly fitted to the cylinder neck 5 under the rebound force of the second spring, until the top of the valve core 22 abuts against the valve body handle 11. At this time, as the valve body handle 11 continues to rotate clockwise, since the valve core 22 can no longer move upward, the valve seat 21 can move upward relative to the valve core 22, thereby exposing the spike 224 and piercing the cylinder neck 5, thus achieving a preliminary connection between the cylinder and the valve. When the valve body handle 11 continues to rotate clockwise to the end point, the upper part 12 and the lower part 13 of the valve body are in a state of no force. At this time, the first spring 41 rebounds, driving the valve core assembly 2 to move downward a certain distance, so that the pipeline gradually begins to connect (e.g. Figure 3As shown in the diagram, this allows the refrigerant to smoothly enter the filling pipeline from the cylinder for filling. When the first cylinder of refrigerant has been filled and the second cylinder needs to be replaced, the valve body 1 is separated from the cylinder opening 5, that is, the supporting force of the cylinder opening 5 on the valve core assembly 2 is removed. The second spring 42 rebounds, thereby pushing the valve seat 21 and valve core 22 to move downwards quickly until the valve seat 21 and valve core 22 move to the initial position and return to the initial sealed state, thus achieving the self-sealing function.

[0032] In this embodiment, the leak-proof opening valve of this application includes a valve body, a valve core assembly, a sealing gasket, and a spring assembly. By providing a guide hole on the valve body, the valve core assembly can move stably and accurately under the precise guidance of the guide hole. By providing the first sealing ring, the second sealing ring, and the third sealing ring, the sealing performance between the valve seat and the valve core, as well as between the valve seat and the valve body, is effectively improved, thereby effectively preventing refrigerant leakage from the gaps inside the valve body and greatly improving the overall sealing performance of the leak-proof opening valve. Through the coordinated action of the first spring and the second spring, the relative position of the valve core assembly and the valve body can be precisely controlled, achieving reliable connection or disconnection of the pipeline channel. Compared with existing technologies, the solution provided in this application can achieve a self-sealing function, effectively preventing air from entering the filling pipeline when changing the cylinder, thus eliminating the need for air venting after cylinder replacement, making the entire operation process simpler; in addition, since there is no need to vent air from the pipeline, the problem of refrigerant leakage is effectively avoided, which reduces refrigerant waste and air pollution, effectively improving convenience and environmental friendliness.

[0033] In the description of this application, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this application; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0034] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., may be used here to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figure. It should be understood that spatial relative terms are intended to include different orientations in use or operation in addition to the orientation of the device as described in the figure.

[0035] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, these terms have no special meaning and therefore should not be construed as limiting the scope of protection of this application. The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A leak-proof opening valve, characterized in that, It includes a valve body (1), a valve core assembly (2), a sealing gasket (3), and a spring assembly (4); The valve core assembly (2) is disposed inside the valve body (1) and is movable along the axial direction of the valve body (1); The sealing gasket (3) is disposed at the bottom end of the valve core assembly (2) and protrudes from the valve core assembly (2) to fit tightly with the cylinder mouth (5) to achieve a sealing effect with the cylinder mouth (5); The spring assembly (4) is disposed inside the valve body (1) and is fixedly connected to the valve body (1) and the valve core assembly (2) respectively, for controlling the relative position of the valve body (1) and the valve core assembly (2) to realize the connection or disconnection of the pipeline channel.

2. The leak-proof opening valve according to claim 1, characterized in that, The valve body (1) includes a valve handle (11), an upper part (12) of the valve body, and a lower part (13) of the valve body; The valve body handle (11), the upper part of the valve body (12), and the lower part of the valve body (13) are arranged sequentially from top to bottom; Furthermore, the bottom end of the valve body handle (11) is connected to the top end of the upper part (12) of the valve body, and the bottom end of the upper part (12) of the valve body is connected to the top end of the lower part (13) of the valve body.

3. The leak-proof opening valve according to claim 2, characterized in that, The upper part (12) of the valve body includes a connecting ring (121); The inner sidewalls at both ends of the connecting ring (121) are provided with internal threads; The bottom end of the valve handle (11) and the top end of the lower part (13) of the valve body are respectively provided with external threads that are compatible with the internal threads.

4. The leak-proof opening valve according to claim 3, characterized in that, The upper part (12) of the valve body also includes a ring (122) and a guide hole (123); The circular ring (122) is horizontally arranged inside the connecting ring body (121) and is integrally connected with the connecting ring body (121), and the cross-section after connection is H-shaped. The guide hole (123) is disposed on the ring (122) and located at the center of the ring (122), and the hole wall of the guide hole (123) is in contact with the valve core assembly (2).

5. The leak-proof opening valve according to claim 4, characterized in that, The valve core assembly (2) includes a valve seat (21) and a valve core (22); The valve seat (21) is disposed in the inner cavity of the lower part (13) of the valve body, and the outer side wall of the valve seat (21) is in contact with the inner side wall of the lower part (13) of the valve body, and can move up and down along the inner side wall of the lower part (13) of the valve body. The upper part of the valve core (22) passes through the guide hole (123) and is disposed in the valve body (1), and can move axially relative to the guide hole (123); The lower part of the valve core (22) is inserted into the valve seat (21).

6. The leak-proof opening valve according to claim 5, characterized in that, It also includes a first sealing ring (6); The valve seat (21) has a first sealing groove (211) on its inner side wall; The first sealing ring (6) is disposed in the first sealing groove (211) to achieve a seal between the valve core (22) and the valve seat (21).

7. The leak-proof opening valve according to claim 5, characterized in that, It also includes a second sealing ring (7) and a third sealing ring (8); The valve seat (21) is provided with a second sealing groove (212) and a third sealing groove (213) on its outer side wall; The second sealing groove (212) and the third sealing groove (213) are arranged sequentially from top to bottom; The second sealing ring (7) is disposed in the second sealing groove (212); The third sealing ring (8) is disposed in the third sealing groove (213).

8. The leak-proof opening valve according to claim 5, characterized in that, The spring assembly (4) includes a first spring (41) and a second spring (42); Both the first spring (41) and the second spring (42) are disposed inside the valve body (1); The top end of the first spring (41) is connected to the valve body handle (11), and the bottom end is connected to the top end of the valve core (22). The top end of the second spring (42) is connected to the upper part (12) of the valve body, and the bottom end is connected to the top end of the valve seat (21).

9. The leak-proof opening valve according to claim 5, characterized in that, The valve core (22) includes a first cylinder (221), a second cylinder (222), a third cylinder (223), and a spike (224); The first cylinder (221), the second cylinder (222), the third cylinder (223), and the spike (224) are arranged sequentially from top to bottom and are integrally formed; Wherein, the bottom diameter of the first cylinder (221) is larger than the diameter of the guide hole (123); The bottom diameter of the second cylinder (222) is adapted to the guide through hole (123), and the second cylinder (222) fits against the hole wall of the guide through hole (123); The bottom diameter of the third cylinder (223) is smaller than the diameter of the guide hole (123), and it is located below the guide hole (123); The bottom end of the spike (224) is conical and is used to pierce the mouth (5) of the steel cylinder.

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