Downward-pressing sealing type anti-explosion valve

Abstract

According to the technical scheme, the downward-pressing sealing type anti-explosion valve is characterized by comprising a valve body and a valve seat; the valve body is in corresponding contact with the valve seat to form an exhaust passage; the valve seat is provided with at least one exhaust hole, the exhaust hole is used for communicating a battery pack and an exhaust channel, the valve body is provided with a movable assembly, the movable assembly is fixed with the valve body, a flat sealing ring is arranged in the valve seat, the cross section of the flat sealing ring is square, and the valve seat is provided with a sealing ring. The outer side of the flat sealing ring abuts against the inner wall of the valve seat, and one end of the flat sealing ring is attached to the valve seat. When the movable assembly is in an initial state, the valve body is pressed on the flat sealing ring to seal the exhaust hole; compared with a sealing ring with a circular section, the flat sealing ring does not need to be mounted by adopting specific pressure mechanical equipment, so that the mounting efficiency is higher, and the cost is lower.

Description

Technical Field

[0001] This utility model relates to the field of explosion-proof valve technology, and more specifically, it relates to a pressure-sealed explosion-proof valve. Background Technology

[0002] Explosion-proof valves are important types of valves widely used in equipment requiring waterproofing and pressure relief in industries such as petrochemicals, metallurgy, power, gas, and automobiles. They are typically installed on the equipment's outer casing. The core function of an explosion-proof valve is to prevent the intrusion of liquids and contaminants while allowing gas molecules to pass through to balance the pressure. It can rapidly release pressure when the internal pressure of the equipment or system exceeds a safe threshold, preventing an explosion.

[0003] Taking batteries as an example, during use, internal chemical reactions may produce gas, which can cause the internal pressure of the battery pack to rise sharply. When the internal pressure exceeds the preset safety value, the explosion-proof valve installed on the battery pack will open quickly to release the internal pressure and prevent an explosion, thus protecting the safety of the battery pack, the car, and the people.

[0004] Most existing explosion-proof valves use spring-controlled switches. When the internal air pressure of the equipment exceeds the spring's yield strength, the spring will compress, thereby opening the valve to release air and pressure. The valve body of this type of explosion-proof valve is generally made of metal, and the spring is usually located in the middle of the valve body. A support structure for connecting the spring and the opening and closing mechanism needs to be machined in the middle of the valve body. For example, the explosion-proof valve disclosed in patent CN216590228U can be opened by the air pressure inside the battery pack when the pressure inside the battery pack exceeds a preset safety value.

[0005] The inner sealing ring in the aforementioned explosion-proof valve has a circular cross-section. During assembly, in order to prevent the inner sealing ring from shifting on the valve body, it is necessary to press the inner sealing ring into the sealing groove of the valve body. Specific pressure machinery is required to compress the inner sealing ring. This assembly method is relatively troublesome, inefficient, and costly, and therefore has room for improvement. Utility Model Content

[0006] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a pressure-sealed explosion-proof valve that uses a flat sealing ring instead of a circular sealing ring. The flat sealing ring does not require specific pressure machinery for installation, resulting in higher installation efficiency and lower cost.

[0007] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a pressure-sealed explosion-proof valve, comprising: a valve body and a valve seat; the valve body and the valve seat correspondingly contact each other to form an exhaust channel; the valve seat is provided with at least one exhaust hole, the exhaust hole being used to connect a battery pack and the exhaust channel; the valve body is provided with a movable component, the movable component being fixed to the valve body; a flat sealing ring is provided inside the valve seat, the flat sealing ring having a square cross-section, the outer side of the flat sealing ring abutting against the inner wall of the valve seat, and one end of the flat sealing ring fitting against the valve seat; when the movable component is in its initial state, the valve body presses against the flat sealing ring to seal the exhaust hole.

[0008] Specifically, when assembling the flat sealing ring inside the valve seat, because the bottom of the flat sealing ring fits against the inner wall of the valve seat and the outer side of the flat sealing ring abuts against the inner wall of the valve seat, the flat sealing ring is difficult to slide inside the valve seat. Therefore, it is not necessary to set a sealing groove inside the valve seat and press the flat sealing ring into the sealing groove. The installation of the flat sealing ring can be completed simply by placing it stably inside the valve seat and positioning it outside the vent hole. Compared to sealing rings with a circular cross-section, flat sealing rings do not require specific pressure machinery for installation, resulting in higher installation efficiency and lower cost.

[0009] When the moving component is in its initial state, it pulls the valve body, pressing the side of the valve body facing the valve seat against the flat sealing ring. At this time, the vent is closed by the valve body and the flat sealing ring, isolating the battery pack from the outside. When the air pressure inside the battery pack exceeds a preset safety value, the gas inside the battery pack pushes the valve body through the vent, separating the valve body from the flat sealing ring. The vent then connects the battery pack and the vent passage, allowing the gas inside the battery pack to escape to the outside through the vent and the vent passage.

[0010] Optionally, the valve body includes a valve cover and a connecting seat; an installation cavity is provided on the valve cover; the connecting seat is disposed in the installation cavity; the connecting seat is fixed to the movable component, and when the movable component is in its initial state, the valve cover is pressed against the flat sealing ring to seal the exhaust hole.

[0011] Specifically, the movable component is connected via a connecting seat, which is then installed in the mounting cavity on the valve cover. When the movable component is in its initial state, it pulls the connecting seat, which in turn causes the valve cover to press against the flat sealing ring, thus completing the sealing of the vent hole.

[0012] Optionally, a pressing protrusion ring is provided on the side of the valve cover facing the valve seat. When the movable component is in its initial state, the pressing protrusion ring presses against the flat sealing ring to seal the exhaust hole.

[0013] Specifically, by setting a downward pressing protrusion ring on the valve cover, when the moving component is in the initial state, the downward pressing protrusion ring can fully compress the flat sealing ring and cause the flat sealing ring to deform. The downward pressing protrusion ring is partially embedded in the flat sealing ring, further improving the sealing effect of the valve cover and the flat sealing ring.

[0014] Optionally, a fitting groove is provided on the side wall of the valve seat, and the outer end of the flat sealing ring is fitted into the fitting groove.

[0015] Specifically, when installing the flat sealing ring inside the valve seat, simply insert the flat sealing ring at an angle into the valve seat, and embed the outer end of the flat sealing ring into the fitting groove. Then, press the entire flat sealing ring into the valve seat. After the flat sealing ring reaches the bottom of the valve seat, the outer end of the flat sealing ring loses contact with the inner wall of the valve seat and is embedded in the fitting groove, thus fixing the flat sealing ring flat inside the valve seat.

[0016] Optionally, the movable component includes a connecting rod and an elastic element; one end of the connecting rod is fixed to the valve body, one end of the elastic element abuts against the valve seat, and the other end is disposed on the connecting rod; when the elastic element is in its initial state, the connecting rod pulls the valve body to press it against the flat sealing ring to seal the exhaust hole.

[0017] Specifically, the elastic element pushes the connecting rod, causing the valve body, fixed to the connecting rod, to press firmly against the flat sealing ring. When the gas pressure inside the battery pack exceeds a preset safety value, the gas inside the battery pack pushes the valve body through the vent. At this time, the elastic element is compressed, the valve body separates from the flat sealing ring, and the gas inside the battery pack can be discharged to the outside through the vent. Once the gas pressure inside the battery pack falls below the preset safety value, the elastic element resets and pushes the connecting rod, causing the connecting rod to press the valve body firmly against the flat sealing ring.

[0018] Optionally, an outer sealing ring is provided on the valve seat at the end opposite to the valve body.

[0019] Specifically, by setting an external sealing ring, the airtightness of the connection between the valve seat and the battery pack can be improved.

[0020] Optionally, an external thread is provided on the valve seat at one end opposite to the valve body, and the external thread is threadedly connected to the battery pack.

[0021] Specifically, fixing the valve seat to the battery pack using external threads can improve the connection stability between the valve seat and the battery pack.

[0022] Optionally, a clamping nut adapted to the external thread is provided on the valve seat, and the clamping nut is threadedly connected to the external thread.

[0023] Specifically, by setting a clamping nut on the valve seat, after the valve seat is fixed to the battery pack, the clamping nut is screwed in from the inside of the battery pack, and the valve seat and the clamping nut clamp the outer wall of the battery pack, further improving the connection stability between the valve seat and the battery pack.

[0024] In summary, this utility model has the following advantages: When assembling the flat sealing ring inside the valve seat, because the bottom of the flat sealing ring fits against the inner wall of the valve seat and the outer side of the flat sealing ring abuts against the inner wall of the valve seat, the flat sealing ring is difficult to slide inside the valve seat. Therefore, it is not necessary to set a sealing groove inside the valve seat and press the flat sealing ring into the sealing groove. The installation of the flat sealing ring can be completed simply by placing it stably inside the valve seat and positioning it outside the vent hole. Compared to sealing rings with a circular cross-section, the flat sealing ring does not require specific pressure machinery for installation, resulting in higher installation efficiency and lower cost. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of the explosion-proof valve when it is closed according to an embodiment of this utility model;

[0026] Figure 2 This is a cross-sectional structural schematic diagram of an embodiment of the present utility model;

[0027] Figure 3 This is a schematic diagram of the explosion-proof valve when it is opened according to an embodiment of this utility model.

[0028] In the diagram: 1. Valve body; 2. Valve seat; 21. Valve cover; 22. Connecting seat; 3. Vent hole; 4. Moving component; 41. Connecting rod; 42. Elastic element; 5. Flat sealing ring; 6. Mounting cavity; 7. Lower pressure convex ring; 8. Fitting groove; 9. Outer sealing ring; 10. External thread; 11. Clamping nut. Detailed Implementation

[0029] To make the objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model are described in detail below with reference to the accompanying drawings. Several embodiments of this utility model are shown in the drawings. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein.

[0030] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature.

[0031] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0032] Example 1

[0033] This embodiment provides a pressure-sealed explosion-proof valve, such as... Figure 1 and Figure 2 As shown, it includes: a valve body 1 and a valve seat 2; the valve body 1 and the valve seat 2 are in corresponding contact to form an exhaust channel; the valve seat 2 is provided with at least one exhaust hole 3, which is used to connect the battery pack and the exhaust channel; the valve body 1 is provided with a movable component 4, which is fixed to the valve body 1; a flat sealing ring 5 is provided inside the valve seat 2, the cross section of the flat sealing ring 5 is square, the outer side of the flat sealing ring 5 abuts against the inner wall of the valve seat 2, and one end of the flat sealing ring 5 is in contact with the valve seat 2; when the movable component 4 is in the initial state, the valve body 1 is pressed against the flat sealing ring 5 to seal the exhaust hole 3.

[0034] Specifically, when assembling the flat sealing ring 5 inside the valve seat 2, because the bottom of the flat sealing ring 5 fits against the inner wall of the valve seat 2 and the outer side of the flat sealing ring 5 abuts against the inner wall of the valve seat 2, the flat sealing ring 5 is difficult to slide inside the valve seat 2. Therefore, it is not necessary to set a sealing groove inside the valve seat 2 and press the flat sealing ring 5 into the sealing groove. The installation of the flat sealing ring 5 can be completed simply by placing the flat sealing ring 5 stably inside the valve seat 2 and positioning it outside the vent hole 3. Compared to sealing rings with a circular cross-section, the flat sealing ring 5 does not require specific pressure machinery for installation, resulting in higher installation efficiency and lower cost.

[0035] When the movable component 4 is in its initial state, it pulls the valve body 1, pressing the side of the valve body 1 facing the valve seat 2 against the flat sealing ring 5. At this time, the vent hole 3 is closed by the valve body 1 and the flat sealing ring 5, isolating the battery pack from the outside. When the air pressure inside the battery pack exceeds a preset safety value, the gas inside the battery pack pushes the valve body 1 through the vent hole 3. At this time, the valve body 1 separates from the flat sealing ring 5, and the vent hole 3 connects the battery pack and the venting channel, allowing the gas inside the battery pack to be discharged to the outside through the vent hole 3 and the venting channel.

[0036] Optionally, the valve body 1 includes a valve cover 21 and a connecting seat 22; an installation cavity 6 is provided on the valve cover 21; the connecting seat 22 is disposed in the installation cavity 6; the connecting seat 22 is fixed to the movable component 4, and when the movable component 4 is in the initial state, the valve cover 21 is pressed against the flat sealing ring 5 to seal the exhaust hole 3.

[0037] Specifically, the movable component 4 is connected by the connecting seat 22 and installed in the mounting cavity 6 on the valve cover 21. When the movable component 4 is in the initial state, the movable component 4 pulls the connecting seat 22, and the connecting seat 22 drives the valve cover 21 to press against the flat sealing ring 5, thus completing the sealing of the exhaust hole 3.

[0038] Optionally, a pressing protrusion 7 is provided on the side of the valve cover 21 facing the valve seat 2. When the movable component 4 is in the initial state, the pressing protrusion 7 presses against the flat sealing ring 5 to seal the exhaust hole 3.

[0039] Specifically, by providing a pressing protrusion 7 on the valve cover 21, when the movable component 4 is in the initial state, the pressing protrusion 7 can fully compress the flat sealing ring 5 and cause the flat sealing ring 5 to deform. The pressing protrusion 7 is partially embedded in the flat sealing ring 5, further improving the sealing effect of the valve cover 21 and the flat sealing ring 5.

[0040] Optionally, a fitting groove 8 is provided on the side wall of the valve seat 2, and the outer end of the flat sealing ring 5 is fitted into the fitting groove 8.

[0041] Specifically, when installing the flat sealing ring 5 into the valve seat 2, simply insert the flat sealing ring 5 into the valve seat 2 at an angle, and embed the outer end of the flat sealing ring 5 into the fitting groove 8. Then, press the flat sealing ring 5 into the valve seat 2 as a whole. After the flat sealing ring 5 reaches the bottom of the valve seat 2, the outer end of the flat sealing ring 5 loses contact with the inner wall of the valve seat 2 and is embedded into the fitting groove 8, thus the flat sealing ring 5 is fixed flat in the valve seat 2.

[0042] Optionally, the movable component 4 includes a connecting rod 41 and an elastic element 42; one end of the connecting rod 41 is fixed to the valve body 1, one end of the elastic element 42 abuts against the valve seat 2, and the other end is disposed on the connecting rod 41; when the elastic element 42 is in the initial state, the connecting rod 41 pulls the valve body 1 to press it against the flat sealing ring 5 to seal the exhaust hole 3.

[0043] Specifically, the elastic element 42 pushes the connecting rod 41, causing the valve body 1, fixed to the connecting rod 41, to press tightly against the flat sealing ring 5. When the air pressure inside the battery pack exceeds a preset safety value, the gas inside the battery pack pushes the valve body 1 through the exhaust port 3. At this time, the elastic element 42 is compressed, the valve body 1 separates from the flat sealing ring 5, and the gas inside the battery pack can be discharged to the outside through the exhaust port 3. When the air pressure inside the battery pack falls below the preset safety value, the elastic element 42 resets and pushes the connecting rod 41, causing the connecting rod 41 to press the valve body 1 tightly against the flat sealing ring 5.

[0044] In this embodiment, the connecting rod 41 is provided with threads, and the connecting rod 41 is threadedly connected to the connecting seat 22. The elastic element 42 is a spring, with one end of the spring abutting against the end of the connecting rod 41 and the other end abutting against the valve seat 2.

[0045] Example 2

[0046] This embodiment provides a pressure-sealed explosion-proof valve, such as... Figure 1-3 As shown, it includes: a valve body 1 and a valve seat 2; the valve body 1 and the valve seat 2 are in corresponding contact to form an exhaust channel; the valve seat 2 is provided with at least one exhaust hole 3, which is used to connect the battery pack and the exhaust channel; the valve body 1 is provided with a movable component 4, which is fixed to the valve body 1; a flat sealing ring 5 is provided inside the valve seat 2, the cross section of the flat sealing ring 5 is square, the outer side of the flat sealing ring 5 abuts against the inner wall of the valve seat 2, and one end of the flat sealing ring 5 is in contact with the valve seat 2; when the movable component 4 is in the initial state, the valve body 1 is pressed against the flat sealing ring 5 to seal the exhaust hole 3.

[0047] Specifically, when assembling the flat sealing ring 5 inside the valve seat 2, because the bottom of the flat sealing ring 5 fits against the inner wall of the valve seat 2 and the outer side of the flat sealing ring 5 abuts against the inner wall of the valve seat 2, the flat sealing ring 5 is difficult to slide inside the valve seat 2. Therefore, it is not necessary to set a sealing groove inside the valve seat 2 and press the flat sealing ring 5 into the sealing groove. The installation of the flat sealing ring 5 can be completed simply by placing the flat sealing ring 5 stably inside the valve seat 2 and positioning it outside the vent hole 3. Compared to sealing rings with a circular cross-section, the flat sealing ring 5 does not require specific pressure machinery for installation, resulting in higher installation efficiency and lower cost.

[0048] When the movable component 4 is in its initial state, it pulls the valve body 1, pressing the side of the valve body 1 facing the valve seat 2 against the flat sealing ring 5. At this time, the vent hole 3 is closed by the valve body 1 and the flat sealing ring 5, isolating the battery pack from the outside. When the air pressure inside the battery pack exceeds a preset safety value, the gas inside the battery pack pushes the valve body 1 through the vent hole 3. At this time, the valve body 1 separates from the flat sealing ring 5, and the vent hole 3 connects the battery pack and the venting channel, allowing the gas inside the battery pack to be discharged to the outside through the vent hole 3 and the venting channel.

[0049] Optionally, the valve body 1 includes a valve cover 21 and a connecting seat 22; an installation cavity 6 is provided on the valve cover 21; the connecting seat 22 is disposed in the installation cavity 6; the connecting seat 22 is fixed to the movable component 4, and when the movable component 4 is in the initial state, the valve cover 21 is pressed against the flat sealing ring 5 to seal the exhaust hole 3.

[0050] Specifically, the movable component 4 is connected by the connecting seat 22 and installed in the mounting cavity 6 on the valve cover 21. When the movable component 4 is in the initial state, the movable component 4 pulls the connecting seat 22, and the connecting seat 22 drives the valve cover 21 to press against the flat sealing ring 5, thus completing the sealing of the exhaust hole 3.

[0051] Optionally, a pressing protrusion 7 is provided on the side of the valve cover 21 facing the valve seat 2. When the movable component 4 is in the initial state, the pressing protrusion 7 presses against the flat sealing ring 5 to seal the exhaust hole 3.

[0052] Specifically, by providing a pressing protrusion 7 on the valve cover 21, when the movable component 4 is in the initial state, the pressing protrusion 7 can fully compress the flat sealing ring 5 and cause the flat sealing ring 5 to deform. The pressing protrusion 7 is partially embedded in the flat sealing ring 5, further improving the sealing effect of the valve cover 21 and the flat sealing ring 5.

[0053] Optionally, a fitting groove 8 is provided on the side wall of the valve seat 2, and the outer end of the flat sealing ring 5 is fitted into the fitting groove 8.

[0054] Specifically, when installing the flat sealing ring 5 into the valve seat 2, simply insert the flat sealing ring 5 into the valve seat 2 at an angle, and embed the outer end of the flat sealing ring 5 into the fitting groove 8. Then, press the flat sealing ring 5 into the valve seat 2 as a whole. After the flat sealing ring 5 reaches the bottom of the valve seat 2, the outer end of the flat sealing ring 5 loses contact with the inner wall of the valve seat 2 and is embedded into the fitting groove 8, thus the flat sealing ring 5 is fixed flat in the valve seat 2.

[0055] Optionally, the movable component 4 includes a connecting rod 41 and an elastic element 42; one end of the connecting rod 41 is fixed to the valve body 1, one end of the elastic element 42 abuts against the valve seat 2, and the other end is disposed on the connecting rod 41; when the elastic element 42 is in the initial state, the connecting rod 41 pulls the valve body 1 to press it against the flat sealing ring 5 to seal the exhaust hole 3.

[0056] Specifically, the elastic element 42 pushes the connecting rod 41, causing the valve body 1, fixed to the connecting rod 41, to press tightly against the flat sealing ring 5. When the air pressure inside the battery pack exceeds a preset safety value, the gas inside the battery pack pushes the valve body 1 through the exhaust port 3. At this time, the elastic element 42 is compressed, the valve body 1 separates from the flat sealing ring 5, and the gas inside the battery pack can be discharged to the outside through the exhaust port 3. When the air pressure inside the battery pack falls below the preset safety value, the elastic element 42 resets and pushes the connecting rod 41, causing the connecting rod 41 to press the valve body 1 tightly against the flat sealing ring 5.

[0057] In this embodiment, the connecting rod 41 is provided with threads, and the connecting rod 41 is threadedly connected to the connecting seat 22. The elastic element 42 is a spring, with one end of the spring abutting against the end of the connecting rod 41 and the other end abutting against the valve seat 2.

[0058] Optionally, an outer sealing ring 9 is provided on the valve seat 2 at the end opposite to the valve body 1.

[0059] Specifically, by setting the outer sealing ring 9, the airtightness of the connection between the valve seat 2 and the battery pack can be improved.

[0060] Optionally, an external thread 10 is provided on the valve seat 2 at the end opposite to the valve body 1, and the external thread 10 is threadedly connected to the battery pack.

[0061] Specifically, fixing the valve seat 2 to the battery pack via the external thread 10 can improve the connection stability between the valve seat 2 and the battery pack.

[0062] Optionally, a clamping nut 11 adapted to the external thread 10 is provided on the valve seat 2, and the clamping nut 11 is threadedly connected to the external thread 10.

[0063] Specifically, by providing a clamping nut 11 on the valve seat 2, after the valve seat 2 is fixed to the battery pack, the clamping nut 11 is screwed in from the inside of the battery pack, clamping the valve seat 2 and the clamping nut 11 against the outer wall of the battery pack, further improving the connection stability between the valve seat 2 and the battery pack. The above description is merely a preferred embodiment of this utility model, and the protection scope of this utility model is not limited to the above embodiments. All technical solutions within the scope of this utility model's concept are within the protection scope of this utility model. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A pressure-sealed explosion-proof valve, characterized in that, include: The valve body and valve seat are in corresponding contact to form an exhaust channel. The valve seat is provided with at least one exhaust hole, which is used to connect the battery pack and the exhaust channel. The valve body is provided with a movable component, which is fixed to the valve body. A flat sealing ring is provided inside the valve seat. The flat sealing ring has a square cross-section. The outer side of the flat sealing ring abuts against the inner wall of the valve seat, and one end of the flat sealing ring is fitted with the valve seat. When the movable component is in its initial state, the valve body is pressed against the flat sealing ring to seal the exhaust hole.

2. The pressure-sealed explosion-proof valve according to claim 1, characterized in that, The valve body includes a valve cover and a connecting seat; an installation cavity is provided on the valve cover; the connecting seat is disposed in the installation cavity; the connecting seat is fixed to the movable component, and when the movable component is in its initial state, the valve cover is pressed against the flat sealing ring to seal the exhaust hole.

3. The pressure-sealed explosion-proof valve according to claim 2, characterized in that, A downward pressing protrusion is provided on the side of the valve cover facing the valve seat. When the movable component is in its initial state, the downward pressing protrusion presses against the flat sealing ring to seal the exhaust hole.

4. The pressure-sealed explosion-proof valve according to claim 1, characterized in that, A fitting groove is provided on the side wall of the valve seat, and the outer end of the flat sealing ring is fitted into the fitting groove.

5. A pressure-sealed explosion-proof valve according to claim 1, characterized in that, The movable component includes a connecting rod and an elastic element; one end of the connecting rod is fixed to the valve body, one end of the elastic element abuts against the valve seat, and the other end is disposed on the connecting rod; when the elastic element is in its initial state, the connecting rod pulls the valve body to press it against the flat sealing ring to seal the exhaust hole.

6. A pressure-sealed explosion-proof valve according to claim 1, characterized in that, An outer sealing ring is provided on the valve seat at the end opposite to the valve body.

7. A pressure-sealed explosion-proof valve according to claim 1, characterized in that, An external thread is provided on the valve seat at the end opposite to the valve body, the external thread being used for threaded connection with the battery pack.

8. A pressure-sealed explosion-proof valve according to claim 7, characterized in that, A clamping nut adapted to the external thread is provided on the valve seat, and the clamping nut is threadedly connected to the external thread.

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