A pressure relief valve and sealing device

Abstract

The utility model relates to the technical field of pressure relief valves, and in particular to a pressure relief valve and a sealing device. The pressure relief valve includes a valve body, a bracket and a valve cover; the valve body includes a main body, the main body is provided with a through hollow passage, the bracket includes a cylinder and an interception net provided on the cylinder, the cylinder is detachably connected to the hollow passage through the interception net, an elastic limiting component is provided in the cylinder, at least a part of the valve cover is slidably passed through the cylinder and connected to the elastic limiting component, and the elastic limiting component applies a pulling force to the valve cover so that the valve cover covers the valve body. The pressure relief valve provided by the utility model can intercept the internal spray of the corresponding equipment when in use, and has a simple structure and low production cost.

Description

[Technical field]

[0001] The utility model relates to the technical field of pressure relief valves, in particular to a pressure relief valve and a sealing device. [Background technology]

[0002] In the new energy battery pack and energy storage equipment manufacturing industry, explosion-proof valves are key components to ensure the safety of battery systems. Their production and assembly efficiency is directly related to the cost control and product launch speed of the entire industry chain. Traditional explosion-proof valve designs are mostly based on metal materials. Although they perform well in terms of durability and safety, their production and assembly links face significant challenges. In particular, the assembly process of metal explosion-proof valves usually requires precise size matching, complex fastening operations, and multiple inspection processes, and the production cost is very high. [Contents of the utility model]

[0003] In order to solve the technical problem of excessively high manufacturing cost of existing pressure relief valves, the utility model provides a pressure relief valve and a sealing device.

[0004] The solution to the technical problem of the utility model is to provide a pressure relief valve, which includes a valve body, a bracket and a valve cover; the valve body includes a main body, and the main body is provided with a through hollow passage, the bracket includes a cylinder and an interception net arranged on the cylinder, the cylinder is detachably connected to the hollow passage through the interception net, an elastic limiting component is arranged in the cylinder, at least a part of the valve cover can be slidably passed through the cylinder and is connected to the elastic limiting component, and the elastic limiting component applies a pulling force to the valve cover so that the valve cover covers the valve body.

[0005] Preferably, the cylinder is coaxially arranged with the hollow channel, and the intercepting net is arranged around the circumferential outer surface of the cylinder.

[0006] Preferably, a sliding channel is provided in the cylinder, and the sliding channel has a first port and a second port relative to each other. The valve cover includes a cover body and a connecting shaft provided on the cover body. The connecting shaft penetrates into the sliding channel from the first port and is connected to the elastic limiting assembly located in the sliding channel.

[0007] Preferably, the elastic limiting assembly includes a limiting member and an elastic member, a first limiting step is arranged in the sliding channel corresponding to the first port, a second limiting step is arranged on the limiting member, two ends of the elastic member respectively abut against the first limiting step and the second limiting step, and the connecting shaft is detachably connected to the limiting member.

[0008] Preferably, the connecting shaft includes a main shaft and a first clamping structure arranged on the main shaft, the limiting member includes a base plate and a boss arranged on the base plate, the boss is provided with a second clamping structure matching with the first clamping structure, and the outer edge of the boss cooperates with the base plate to form the second limiting step.

[0009] Preferably, a first annular groove is provided on the main body corresponding to the outer edge of the hollow channel, and a first annular protrusion is provided on the valve cover corresponding to the first annular groove. When the valve cover is closed, the first annular protrusion is located in the first annular groove.

[0010] Preferably, a second annular groove is provided between the hollow channel and the first annular groove; a first sealing ring is provided in the second annular groove, and a second annular protrusion is provided on the valve cover corresponding to the second annular groove, and the second annular protrusion abuts against the first sealing ring when the valve cover is closed.

[0011] Preferably, the side wall defining the first annular groove away from the hollow channel is the first side wall, and the side wall close to the hollow channel is the second side wall; the side wall of the second annular groove away from the hollow channel is the second side wall, and the side wall defining the second annular groove close to the hollow channel is the third side wall, and the heights of the first side wall, the second side wall and the third side wall decrease gradually.

[0012] Preferably, the valve body is a plastic valve body, and the valve body comprises a mounting ear arranged on a circumferential side of the main body, the mounting ear is provided with a mounting hole, and a metal reinforcement is provided at the mounting hole.

[0013] Another solution of the utility model to solve the technical problem is to provide a sealing device, including a sealing box and the pressure relief valve as described above, wherein the sealing box is provided with a accommodating cavity inside, and the sealing box is provided with an opening connecting the accommodating cavity with the outside world, and the pressure relief valve is arranged at the opening and closes the opening.

[0014] Compared with the prior art, the utility model provides a pressure relief valve and sealing device, which has the following advantages:

[0015] 1. The pressure relief valve provided by the embodiment of the utility model can effectively simplify the structure of the valve body itself and reduce the difficulty of producing the valve body by providing a detachable valve body and a bracket. The combined design of the valve body, the bracket and the valve cover, and the application of the elastic limit assembly enable the pressure relief valve to open quickly when the pressure exceeds the limit, and also achieve automatic closing after pressure relief. Specifically, through the detachable connection method, the cylinder can be independently installed or removed without damaging or affecting the overall structure of the valve body. This design greatly simplifies the assembly process, and the assembler can more easily install, inspect or replace the cylinder and the interception net without the need for complex disassembly of the entire valve body. At the same time, an interception net is also provided on the cylinder, which can intercept the internal spray of the corresponding equipment when in use; during the maintenance stage, if the cylinder or the interception net is damaged or needs to be cleaned, the bracket can be replaced separately, which reduces the maintenance cost and improves the availability of the equipment.

[0016] 2. The coaxial arrangement of the cylinder and the hollow channel in the embodiment of the utility model improves the stability of the overall structure and the convenience of installation. Specifically, by arranging the cylinder and the hollow channel coaxially, a space that can accommodate the interception net and evenly surrounds the cylinder is formed between the cylinder and the hollow channel, and then the cylinder is connected to the inner wall of the hollow channel through the interception net, realizing a reasonable layout of the interception net, effectively preventing foreign matter from entering, and making the installation of the cylinder more stable, ensuring the pressure relief efficiency and long-term stability of the equipment.

[0017] 3. The pressure relief valve of the embodiment of the utility model realizes that when the pressure reaches the set threshold, the valve cover can quickly open to release the pressure, and automatically close after the pressure is reduced, which reduces manual intervention and improves the automation level and reliability of the pressure relief valve. Specifically, the introduction of the sliding channel provides a clear path for the connecting shaft of the valve cover, making the installation and disassembly process of the valve cover more direct and reducing the uncertainty and complexity in the assembly process; the presence of the first port and the second port defines the starting and ending points of the sliding channel, which facilitates the accurate positioning of the connecting shaft and ensures a reliable connection between the valve cover and the cylinder. The detachable connection between the connecting shaft and the elastic limit assembly simplifies the assembly steps of the valve cover and the elastic limit assembly, improves the interchangeability and versatility between the components, and is conducive to rapid maintenance and replacement.

[0018] 4. The pressure relief valve of the embodiment of the utility model not only ensures the controllable sliding of the valve cover connecting shaft through the exquisite cooperation of the limiter and the elastic member, but also strengthens the positioning stability of the valve cover in the cylinder without sacrificing the convenience of installation. Specifically, the limiter not only serves as a guide component of the valve cover connecting shaft to ensure the correct sliding path of the connecting shaft in the cylinder, but also provides an installation position for the elastic member through the second limiter step thereon; the elastic member respectively abuts the first limiter step and the second limiter step at both ends to provide the necessary elastic force for the interaction between the limiter and the connecting shaft. This design can provide appropriate feedback force when installing the valve cover, helping the user feel the correct installation position of the valve cover, and also provides a driving force for the automatic return of the valve cover, enhancing the operational feel and responsiveness of the entire pressure relief valve.

[0019] 5. The engagement structure between the connecting shaft and the stopper in the embodiment of the utility model strengthens the stability and interchangeability between the pressure relief valve components, and provides a guarantee for quick installation and precise operation. Specifically, the cooperation between the first engagement structure and the second engagement structure ensures a stable connection between the connecting shaft and the stopper, and can maintain a normal working state even in a high pressure environment.

[0020] 6. The pressure relief valve of the utility model embodiment has grooves and bosses on the main body and the valve cover, which enhances the sealing and alignment accuracy of the valve body and the valve cover, and improves the overall sealing performance. Specifically, the first annular groove and the first annular boss: ensure that the valve cover is correctly aligned and tightly fitted on the valve body, prevent leakage, and improve the reliability of the seal; during assembly, the valve cover can be installed by only a simple alignment operation, which simplifies the assembly process and reduces the possibility of operational errors.

[0021] 7. The pressure relief valve of the embodiment of the utility model further improves the sealing performance and anti-foreign matter intrusion capability of the pressure relief valve by adding a second annular groove and a sealing ring between the hollow channel and the first annular groove.

[0022] 8. The pressure relief valve of the embodiment of the utility model optimizes the pressure distribution and sealing performance by setting the height of different side walls to decrease gradually, thereby enhancing the stability of the structure and the ability to resist harsh environments.

[0023] 9. The embodiment of the utility model adopts a plastic valve body combined with a metal reinforcement, thereby reducing material costs and ensuring structural strength, while simplifying the manufacturing process.

[0024] 10. The embodiment of the utility model also provides a sealing device, including a sealing box and the pressure relief valve mentioned above. Therefore, the sealing device has the same beneficial effects as the above-mentioned pressure relief valve, which will not be described in detail here.

Brief Description of the Drawings

[0025] Figure 1The utility model provides an explosion-proof pressure relief valve. Figure 1 .

[0026] Figure 2 The utility model provides an explosion-proof pressure relief valve. Figure 2 .

[0027] Figure 3 It is a cross-sectional view of a pressure relief valve provided in an embodiment of the utility model.

[0028] Figure 4 It is a structural schematic diagram of a support for a pressure relief valve provided in an embodiment of the utility model.

[0029] Figure 5 It is a structural schematic diagram of a limiter of a pressure relief valve provided in an embodiment of the utility model.

[0030] Figure 6 It is a structural schematic diagram of a valve cover of a pressure relief valve provided in an embodiment of the utility model.

[0031] Figure 7 yes Figure 2 A is an enlarged view of the middle image.

[0032] Figure 8 It is a structural schematic diagram of a valve body of a pressure relief valve provided in an embodiment of the utility model.

[0033] Description of the accompanying drawings:

[0034] 100. Sealing equipment;

[0035] 10. Pressure relief valve;

[0036] 1. valve body; 11. main body; 111. hollow channel; 112.

[0037] an annular groove; 113, a second annular groove; 114, a first side wall;

[0038] 115, second side wall; 116, third side wall; 12, mounting ear; 121,

[0039] Mounting hole; 13, metal reinforcement; 131, metal ring; 132, connection

[0040] splice;

[0041] 2. Bracket; 21. Cylinder; 211. Sliding channel; 2111.

[0042] first port; 2112, second port; 2113, first limiting step;

[0043] 22. Interception net;

[0044] 3. Valve cover; 31. Cover body; 311. First annular protrusion; 312.

[0045] second annular protrusion; 32, connecting shaft; 321, main shaft; 322, first

[0046] A snap-fit ​​structure; 3221, a first protrusion; 3222, a second protrusion;

[0047] 4. elastic limiting assembly; 41. limiting member; 411. bottom plate;

[0048] 412, boss; 4121, second engaging structure; 41211, first notch

[0049] 41212, second notch; 413, second limiting step; 42,

[0050] elastic member; 414, gap;

[0051] 5. First sealing ring; 6. Second sealing ring. [Specific implementation method]

[0052] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below with reference to the accompanying drawings and implementation examples. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0053] It should be noted that the terms "first" and "second" etc. in the specification and claims of the present utility model are used to distinguish different objects rather than to describe a specific order.

[0054] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0055] In the present invention, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inside", "outside", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings. These terms are mainly used to better describe the present invention and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0056] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those skilled in the art, the specific meanings of these terms in this utility model can be understood according to specific circumstances.

[0057] In addition, the terms "installed", "set", "provided with", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0058] Please combine Figure 1 and Figure 2 The first embodiment of the utility model provides a pressure relief valve 10, which includes a valve body 1, a bracket 2 and a valve cover 3; the valve body 1 includes a main body 11, and a through hollow passage 111 is provided on the main body 11, the bracket 2 includes a cylinder 21 and an interception net 22 provided on the cylinder 21, the cylinder 21 is detachably connected to the hollow passage 111 through the interception net 22, an elastic limiting component 4 is provided in the cylinder 21, and at least a part of the valve cover 3 can be slidably penetrated in the cylinder 21 and is connected to the elastic limiting component 4, and the elastic limiting component 4 applies a pulling force to the valve cover 3 so that the valve cover 3 covers the valve body 1.

[0059] It can be understood that the pressure relief valve 10 provided in the embodiment of the utility model can effectively simplify the structure of the valve body 1 itself and reduce the difficulty of producing the valve body 1 by setting up a detachable valve body 1 and a bracket 2. Through the combined design of the valve body 1, the bracket 2 and the valve cover 3, and the application of the elastic limit assembly 4, the pressure relief valve 10 can be quickly opened when the pressure exceeds the limit, and can also achieve automatic closing after pressure relief.

[0060] Specifically, through the detachable connection mode, the cylinder 21 can be independently installed or removed without damaging or affecting the overall structure of the valve body 1. This design greatly simplifies the assembly process, and the assembler can more easily install, inspect or replace the cylinder 21 and the interception net 22 without the need to disassemble the entire valve body 1.

[0061] At the same time, an interception net 22 is also provided on the cylinder 21, and the interception net 22 can play a dual role of filtering and protection. When an abnormality occurs inside the equipment equipped with the pressure relief valve 10, such as the thermal runaway of the battery cell to produce high-pressure gas, it may be accompanied by the spraying of materials such as sparks and particles. The interception net 22 can effectively block these sparks and foreign matter and prevent them from entering the internal structure of the pressure relief valve 10, thereby protecting the valve body 1 and other precision components from damage and extending the service life of the equipment; in harsh working environments, such as the presence of a large amount of dust, mud or wind and sand, the interception net 22 can effectively prevent these environmental foreign matter from entering the hollow channel 111, ensuring the unobstructed passage, which is crucial for the normal operation of the pressure relief valve 10. Once the channel is blocked, it may lead to poor pressure relief and increase safety hazards. During the maintenance stage, if the cylinder 21 or the interception net 22 is damaged or needs to be cleaned, the detachable design allows the staff to replace the bracket 2 separately, reducing maintenance costs and improving the availability of the equipment.

[0062] It should be noted that designing the cylinder 21 to be detachable means that the manufacture of the valve body 1 can be carried out independently of the cylinder 21. In this way, when the valve body 1 is injection molded or cast, it is not necessary to consider the complexity of the internal structure of the cylinder 21, which is conducive to simplifying the mold design and reducing the difficulty of molding. In addition, separate manufacturing can also flexibly select different materials or processes. For example, the valve body 1 uses a plastic material with low cost and easy molding, while the cylinder 21 can use a more suitable material or process, which can not only ensure the strength and performance of the overall structure, but also effectively control the cost; as a feasible implementation method, the cylinder and the cover body are preferably PC 9417 and GF 30, which meet the performance requirements of high temperature resistance and aging resistance, and have a better price advantage. In addition, PA 6, PA 66, PPA, P PS and PBT can all be used as alternatives for the main material.

[0063] Moreover, the detachable design gives the pressure relief valve 10 greater flexibility, and the cylinder 21 components of different specifications or functions can be quickly replaced according to different application requirements, such as customized configuration for different pressure levels, media types or special environmental conditions, without the need to redesign the entire valve body 1, greatly enhancing the product's adaptability and market competitiveness.

[0064] As a feasible implementation, the interception net 22 is arranged around the middle area of ​​the circumferential outer surface of the cylinder 21, and the number of the interception net 22 is at least one; it can be understood that one, two, three or more interception nets can be arranged on the cylinder 21 according to design requirements.

[0065] Please combine Figure 2 and Figure 3As a feasible implementation, the valve body 1 is a plastic valve body 1, and the valve body 1 includes a mounting ear 12 arranged on the circumferential side of the main body 11, and the mounting ear 12 is provided with a mounting hole 121, and a metal reinforcement 13 is provided at the mounting hole 121.

[0066] It can be understood that the embodiment of the utility model reduces material costs and ensures structural strength by using a plastic valve body 1 in combination with a metal reinforcement 13, while simplifying the manufacturing process. Specifically, the production cost of the pressure relief valve 10 is greatly reduced by using a plastic valve body 1 in this solution, but compared with the use of metal, the use of plastic material will inevitably lead to a decrease in the structural strength of the pressure relief valve 10; and when the pressure relief valve 10 is in use, the main force-bearing position is the area used for installation and fixing, and this problem can be effectively solved by adding a metal reinforcement section at the installation ear 12 in this solution.

[0067] As a feasible implementation, the valve body material is preferably PP S and GF 40, which have high strength and rigidity, and are resistant to high temperature and aging.

[0068] As a feasible implementation, the metal reinforcement 13 and the valve body 1 are integrally formed by insert injection molding.

[0069] As a feasible implementation, the metal reinforcement 13 includes a connected metal ring 131 and a connecting piece 132, the connecting piece 132 is located at the end of the metal ring 131, and the cross-sectional outer diameter of the connecting piece 132 is greater than the cross-sectional outer diameter of the metal ring 131. It can be understood that this design can increase the contact area between the metal reinforcement 13 and the main body 11, thereby enhancing the connection stability between the metal reinforcement 13 and the main body 11.

[0070] Please combine Figure 2 and Figure 3 As a feasible implementation manner, the cylinder 21 is coaxially arranged with the hollow channel 111 , and the intercepting net 22 is arranged around the circumferential outer surface of the cylinder 21 .

[0071] It can be understood that the coaxial arrangement of the cylinder 21 and the hollow channel 111 in the utility model embodiment improves the stability of the overall structure and the convenience of installation. Specifically, by arranging the cylinder 21 and the hollow channel 111 coaxially, a space that can accommodate the interception net 22 and uniformly surrounds the cylinder 21 is formed between the cylinder 21 and the hollow channel 111, and the cylinder 21 is connected to the inner wall of the hollow channel 111 through the interception net 22, realizing the reasonable layout of the interception net 22, effectively preventing foreign matter from entering, and making the installation of the cylinder 21 more stable, ensuring the pressure relief efficiency and long-term stability of the equipment.

[0072] Please further combine Figure 4As a feasible implementation, a sliding channel 211 is provided in the cylinder 21, and the sliding channel 211 has a first port 2111 and a second port 2112 relative to each other. The valve cover 3 includes a cover body 31 and a connecting shaft 32 provided on the cover body 31. The connecting shaft 32 penetrates into the sliding channel 211 from the first port 2111 and is connected to the elastic limiting component 4 located in the sliding channel 211.

[0073] It can be understood that the pressure relief valve 10 of the embodiment of the utility model can quickly open the valve cover 3 to release pressure when the pressure reaches the set threshold value through the cooperation of the sliding channel 211 and the elastic limit assembly 4, and automatically close after the pressure is reduced, thereby reducing manual intervention and improving the automation level and reliability of the pressure relief valve 10. Specifically, the introduction of the sliding channel 211 provides a clear path for the connecting shaft 32 of the valve cover 3, making the installation and disassembly process of the valve cover 3 more direct, reducing the uncertainty and complexity in the assembly process; the existence of the first port 2111 and the second port 2112 defines the starting and ending points of the sliding channel 211, facilitating the accurate positioning of the connecting shaft 32, and ensuring the reliable connection between the valve cover 3 and the cylinder 21. The detachable connection between the connecting shaft 32 and the elastic limit assembly 4 simplifies the assembly steps of the valve cover 3 and the elastic limit assembly 4, improves the interchangeability and versatility between the components, and is conducive to rapid maintenance and replacement.

[0074] As a feasible implementation, the connecting shaft 32 is vertically arranged on a side of the cover 31 close to the main body 11. It can be understood that the vertical axis arrangement makes it more direct to access tools when installing or removing the connecting shaft 32, and the operator can directly operate the connecting shaft 32 from above without having to consider the angle problem too much, which improves the convenience of assembly and maintenance; the vertical layout may simplify the mold design and assembly line setting in the manufacturing process, because it follows the simple principle of straight line and vertical operation, reduces the complicated angle adjustment and alignment steps, and reduces the production cost and time. Figure 2 and Figure 4 and Figure 5 As a feasible implementation, the elastic limiting assembly 4 includes a limiting member 41 and an elastic member 42. A first limiting step 2113 is provided in the sliding channel 211 corresponding to the first port 2111. A second limiting step 413 is provided on the limiting member 41. Both ends of the elastic member 42 respectively abut against the first limiting step 2113 and the second limiting step 413. The connecting shaft 32 is detachably connected to the limiting member 41.

[0075] It can be understood that the pressure relief valve 10 of the embodiment of the utility model not only ensures the controllable sliding of the connecting shaft 32 of the valve cover 3 through the exquisite cooperation of the limiting member 41 and the elastic member 42, but also strengthens the positioning stability of the valve cover 3 in the cylinder 21 without sacrificing the convenience of installation. Specifically, the limiting member 41 not only serves as a guide component of the connecting shaft 32 of the valve cover 3 to ensure the correct sliding path of the connecting shaft 32 in the cylinder 21, but also provides an installation position for the elastic member 42 through the second limiting step 413 thereon; the elastic member 42 respectively abuts the first limiting step 2113 and the second limiting step 413 at both ends, providing the necessary elastic force for the interaction between the limiting member 41 and the connecting shaft 32. This design can provide appropriate feedback force when the valve cover 3 is installed, helping the user to feel the correct installation position of the valve cover 3, and also provides a driving force for the automatic return of the valve cover 3, thereby enhancing the operating feel and responsiveness of the entire pressure relief valve 10.

[0076] As a feasible implementation manner, the first port 2111 of the sliding channel 211 is tightened toward the center of the sliding channel 211 to form a first limiting step 2113 ; meanwhile, the first port 2111 is smaller than the second port 2112 .

[0077] It should be noted that the cross-sectional area of ​​the second port 2112 is larger than the area of ​​the maximum cross-sectional area of ​​the limit member 41, so that the elastic limit member 4 can enter the sliding channel 211 from the second port 2112 and connect to the connecting shaft 32; the cross-sectional area of ​​the first port 2111 is smaller than the area of ​​the maximum cross-sectional area of ​​the limit member 41, thereby preventing the limit member 41 from detaching from the first port 2111.

[0078] As an optional embodiment, the cylinder 21 is substantially cylindrical.

[0079] Please combine Figure 5 and Figure 6 As a feasible implementation, the connecting shaft 32 includes a main shaft 321 and a first locking structure 322 arranged on the main shaft 321, the limiting member 41 includes a bottom plate 411 and a boss 412 arranged on the bottom plate 411, the boss 412 is provided with a second locking structure 4121 that cooperates with the first locking structure 322, and the outer edge of the boss 412 cooperates with the bottom plate 411 to form a second limiting step 413.

[0080] It can be understood that the engagement structure of the connecting shaft 32 and the stopper 41 of the embodiment of the utility model strengthens the stability and interchangeability between the components of the pressure relief valve 10, and provides a guarantee for rapid installation and precise operation. Specifically, the cooperation between the first engagement structure 322 and the second engagement structure 4121 ensures a stable connection between the connecting shaft 32 and the stopper 41, and can maintain a normal working state even in a high pressure environment.

[0081] Please combine Figures 5 to 7 As a feasible implementation, the first engaging structure 322 includes a first protrusion 3221 disposed on the main shaft 321 , and a second protrusion 3222 disposed on the first protrusion 3221 .

[0082] Further, the first protrusion 3221 is a strip-shaped protrusion arranged along the length direction of the main axis 321;

[0083] Furthermore, the second protrusion 3222 is a rectangular protrusion disposed at an end of the first protrusion 3221 away from the cover body 31 .

[0084] Please continue reading Figure 5 As a feasible implementation, at least two bosses 412 are provided on the bottom plate 411. The bosses 412 are arranged in a ring shape and a gap 414 is provided between two adjacent bosses 412. A second locking structure 4121 is provided on one side of the boss 412 close to the gap 414 in a clockwise or counterclockwise direction.

[0085] As a feasible implementation, the second snap-fit ​​structure 4121 includes a first notch 41211 provided on the boss 412, and the first notch 41211 is connected to the gap 414; the second snap-fit ​​structure 4121 also includes a second notch 41212 provided on the boss 412, the second notch 41212 is located above the first notch 41211, and the second notch 41212 is connected to the gap 414 through the first notch 41211.

[0086] As a feasible implementation, the elastic member 42 is a spring, one end of which is sleeved on the outer surface of the boss 412 and abuts against the second limiting step 413 .

[0087] When assembling the valve cover 3 and the elastic connecting component, let the connecting shaft 32 pass through the cylinder 21 located in the hollow channel 111, pass through the elastic member 42 and then extend the second protrusion 3222 on the connecting shaft 32 into the gap 414, then rotate the limit member 41 to allow the limit member 41 and the connecting shaft 32 to rotate relative to each other, allow the second protrusion 3222 to enter the first notch 41211, then remove the external force, allow the cover body 31 and the limit member 41 to relatively displace under the action of the elastic member 42, so that the second protrusion 3222 enters the second notch 41212, and complete the installation.

[0088] Please combine Figure 3 and Figure 8 As a feasible implementation, a first annular groove 112 is provided on the main body 11 corresponding to the outer edge of the hollow channel 111, and a first annular protrusion 311 is provided on the valve cover 3 corresponding to the first annular groove 112. When the valve cover 3 is closed, the first annular protrusion 311 is located in the first annular groove 112.

[0089] It can be understood that the pressure relief valve 10 of the utility model embodiment enhances the sealing and alignment accuracy of the valve body 1 and the valve cover 3 by providing the groove and the boss 412 on the main body 11 and the valve cover 3, thereby improving the overall sealing performance. Specifically, the first annular groove 112 and the first annular boss 311: ensure that the valve cover 3 is correctly aligned and tightly fitted on the valve body 1, prevent leakage, and improve the reliability of the seal; during assembly, the valve cover 3 can be installed by only a simple alignment operation, which simplifies the assembly process and reduces the possibility of operational errors.

[0090] As a feasible implementation, a second annular groove 113 is further provided between the hollow channel 111 and the first annular groove 112; a first sealing ring 5 is provided in the second annular groove 113, and a second annular protrusion 312 is provided on the valve cover 3 corresponding to the second annular groove 113, and the second annular protrusion 312 abuts against the first sealing ring 5 when the valve cover 3 is closed.

[0091] It can be understood that the pressure relief valve 10 of the embodiment of the utility model further improves the sealing performance and anti-foreign matter intrusion capability of the pressure relief valve 10 by adding a second annular groove 113 and a sealing ring between the hollow channel 111 and the first annular groove 112 .

[0092] Please combine Figure 2 and Figure 3 As a feasible implementation, a second sealing ring 6 is further provided at one end of the main body 11 away from the valve cover 3. It can be understood that when the pressure relief valve 10 is installed on an external device, the second sealing ring 6 can ensure the seal between the pressure relief valve 10 and the external device.

[0093] Please continue reading Figure 8 As a feasible implementation, the side wall defining the first annular groove 112 away from the hollow channel 111 is the first side wall 114, and the side wall close to the hollow channel 111 is the second side wall 115; the side wall of the second annular groove 113 away from the hollow channel 111 is the second side wall 115, and the side wall defining the second annular groove 113 close to the hollow channel 111 is the third side wall 116, and the heights of the first side wall 114, the second side wall 115 and the third side wall 116 decrease gradually.

[0094] It can be understood that the pressure relief valve 10 of the embodiment of the utility model optimizes the pressure distribution and sealing performance by setting the height of different side walls to decrease gradually, thereby enhancing the stability of the structure and the ability to resist harsh environments.

[0095] The second embodiment of the utility model further provides a sealing device 100, including a sealing box and the above-mentioned pressure relief valve 10, wherein a containing cavity is provided inside the sealing box, an opening connecting the containing cavity with the outside is provided on the sealing box, and the pressure relief valve 10 is arranged at the opening and closes the opening.

[0096] It can be understood that the sealing device 100 has the same beneficial effects as the above-mentioned pressure relief valve 10, which will not be described in detail here.

[0097] It should be noted that the sealed box can be a sealed box for products such as power batteries, energy storage batteries and communication equipment.

[0098] Compared with the prior art, the utility model provides a pressure relief valve and sealing device, which has the following advantages:

[0099] 1. The pressure relief valve provided by the embodiment of the utility model can effectively simplify the structure of the valve body itself and reduce the difficulty of producing the valve body by providing a detachable valve body and a bracket. The combined design of the valve body, the bracket and the valve cover, and the application of the elastic limit assembly enable the pressure relief valve to open quickly when the pressure exceeds the limit, and also achieve automatic closing after pressure relief. Specifically, through the detachable connection method, the cylinder can be independently installed or removed without damaging or affecting the overall structure of the valve body. This design greatly simplifies the assembly process, and the assembler can more easily install, inspect or replace the cylinder and the interception net without the need for complex disassembly of the entire valve body. At the same time, an interception net is also provided on the cylinder, which can intercept the internal spray of the corresponding equipment when in use; during the maintenance stage, if the cylinder or the interception net is damaged or needs to be cleaned, the bracket can be replaced separately, which reduces the maintenance cost and improves the availability of the equipment.

[0100] 2. The coaxial arrangement of the cylinder and the hollow channel in the embodiment of the utility model improves the stability of the overall structure and the convenience of installation. Specifically, by arranging the cylinder and the hollow channel coaxially, a space that can accommodate the interception net and evenly surrounds the cylinder is formed between the cylinder and the hollow channel, and then the cylinder is connected to the inner wall of the hollow channel through the interception net, realizing a reasonable layout of the interception net, effectively preventing foreign matter from entering, and making the installation of the cylinder more stable, ensuring the pressure relief efficiency and long-term stability of the equipment.

[0101] 3. The pressure relief valve of the embodiment of the utility model realizes that when the pressure reaches the set threshold, the valve cover can quickly open to release the pressure, and automatically close after the pressure is reduced, which reduces manual intervention and improves the automation level and reliability of the pressure relief valve. Specifically, the introduction of the sliding channel provides a clear path for the connecting shaft of the valve cover, making the installation and disassembly process of the valve cover more direct and reducing the uncertainty and complexity in the assembly process; the presence of the first port and the second port defines the starting and ending points of the sliding channel, which facilitates the accurate positioning of the connecting shaft and ensures a reliable connection between the valve cover and the cylinder. The detachable connection between the connecting shaft and the elastic limit assembly simplifies the assembly steps of the valve cover and the elastic limit assembly, improves the interchangeability and versatility between the components, and is conducive to rapid maintenance and replacement.

[0102] 4. The pressure relief valve of the embodiment of the utility model not only ensures the controllable sliding of the valve cover connecting shaft through the exquisite coordination of the limiter and the elastic member, but also strengthens the positioning stability of the valve cover in the cylinder without sacrificing the convenience of installation. Specifically, the limiter not only serves as a guide component of the valve cover connecting shaft to ensure the correct sliding path of the connecting shaft in the cylinder, but also provides an installation position for the elastic member through the second limiter step thereon; the elastic member respectively abuts the first limiter step and the second limiter step at both ends to provide the necessary elastic force for the interaction between the limiter and the connecting shaft. This design can provide appropriate feedback force when installing the valve cover, helping the user to feel the correct installation position of the valve cover, and also provides a driving force for the automatic return of the valve cover, thereby enhancing the operational feel and responsiveness of the entire pressure relief valve.

[0103] 5. The engagement structure between the connecting shaft and the stopper in the embodiment of the utility model strengthens the stability and interchangeability between the pressure relief valve components, and provides a guarantee for quick installation and precise operation. Specifically, the cooperation between the first engagement structure and the second engagement structure ensures a stable connection between the connecting shaft and the stopper, and can maintain a normal working state even in a high pressure environment.

[0104] 6. The pressure relief valve of the utility model embodiment has grooves and bosses on the main body and the valve cover, which enhances the sealing and alignment accuracy of the valve body and the valve cover, and improves the overall sealing performance. Specifically, the first annular groove and the first annular boss: ensure that the valve cover is correctly aligned and tightly fitted on the valve body, prevent leakage, and improve the reliability of the seal; during assembly, the valve cover can be installed by only a simple alignment operation, which simplifies the assembly process and reduces the possibility of operational errors.

[0105] 7. The pressure relief valve of the embodiment of the utility model further improves the sealing performance and anti-foreign matter intrusion capability of the pressure relief valve by adding a second annular groove and a sealing ring between the hollow channel and the first annular groove.

[0106] 8. The pressure relief valve of the embodiment of the utility model optimizes the pressure distribution and sealing performance by setting the height of different side walls to decrease gradually, thereby enhancing the stability of the structure and the ability to resist harsh environments.

[0107] 9. The embodiment of the utility model adopts a plastic valve body combined with a metal reinforcement, thereby reducing material costs and ensuring structural strength, while simplifying the manufacturing process.

[0108] 10. The embodiment of the utility model also provides a sealing device, including a sealing box and the pressure relief valve mentioned above. Therefore, the sealing device has the same beneficial effects as the above-mentioned pressure relief valve, which will not be described in detail here.

[0109] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A pressure relief valve, characterized in that: The pressure relief valve includes a valve body, a bracket and a valve cover; the valve body includes a main body, the main body is provided with a through hollow passage, the bracket includes a cylinder and an interception net provided on the cylinder, the cylinder is detachably connected to the hollow passage via the interception net, an elastic limiting component is provided in the cylinder, at least a partial area of ​​the valve cover is slidably provided in the cylinder and is connected to the elastic limiting component, and the elastic limiting component applies a pulling force to the valve cover so that the valve cover covers the valve body.

2. The pressure relief valve according to claim 1, characterized in that: The cylinder is coaxially arranged with the hollow channel, and the intercepting net is arranged around the circumferential outer surface of the cylinder.

3. The pressure relief valve according to claim 1, characterized in that: A sliding channel is provided in the cylinder, and the sliding channel has a first port and a second port opposite to each other. The valve cover includes a cover body and a connecting shaft provided on the cover body. The connecting shaft penetrates into the sliding channel from the first port and is connected to the elastic limiting assembly located in the sliding channel.

4. The pressure relief valve according to claim 3, characterized in that: The elastic limiting assembly includes a limiting member and an elastic member. A first limiting step is arranged in the sliding channel corresponding to the first port. A second limiting step is arranged on the limiting member. Two ends of the elastic member respectively abut against the first limiting step and the second limiting step. The connecting shaft is detachably connected to the limiting member.

5. The pressure relief valve according to claim 4, characterized in that: The connecting shaft includes a main shaft and a first clamping structure arranged on the main shaft, the limiting member includes a base plate and a boss arranged on the base plate, the boss is provided with a second clamping structure that cooperates with the first clamping structure, and the outer edge of the boss cooperates with the base plate to form the second limiting step.

6. The pressure relief valve according to claim 1, characterized in that: A first annular groove is arranged on the main body corresponding to the outer edge of the hollow channel, and a first annular protrusion is arranged on the valve cover corresponding to the first annular groove. When the valve cover is closed, the first annular protrusion is located in the first annular groove.

7. The pressure relief valve according to claim 6, characterized in that: A second annular groove is also provided between the hollow channel and the first annular groove; a first sealing ring is provided in the second annular groove, and a second annular protrusion is provided on the valve cover corresponding to the second annular groove. When the valve cover is closed, the second annular protrusion abuts against the first sealing ring.

8. The pressure relief valve according to claim 7, characterized in that: The side wall defining the first annular groove away from the hollow channel is the first side wall, and the side wall close to the hollow channel is the second side wall; the side wall defining the second annular groove away from the hollow channel is the second side wall, and the side wall defining the second annular groove close to the hollow channel is the third side wall, and the heights of the first side wall, the second side wall and the third side wall decrease gradually.

9. The pressure relief valve according to claim 1, characterized in that: The valve body is a plastic valve body, and the valve body comprises a mounting ear arranged on the circumferential side of the main body, the mounting ear is provided with a mounting hole, and a metal reinforcement is provided at the mounting hole.

10. A sealing device, characterized in that: It comprises a sealing box and a pressure relief valve as described in any one of claims 1 to 9, wherein a containing cavity is provided inside the sealing box, an opening connecting the containing cavity with the outside is provided on the sealing box, and the pressure relief valve is arranged at the opening and closes the opening.

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