Pressure relief explosion-proof valve

Abstract

The utility model discloses a kind of pressure relief explosion-proof valves, including valve body, upper cover, pressure spring, pressure relief valve piece, first sealing ring and second sealing ring, the utility model is directly clamped and fixed by using the buckle of upper cover and valve body clamping groove with pressure spring being set on upper portion of valve body, replaces traditional bottom spring and bolt fixing mode.This design simplifies overall structure, reduces the risk of component loosening due to vibration, while reducing the occupation of valve body to the internal space of sealed box, so that the structure is more compact and reliable, at the same time, by designing the valve body itself into different forms, it can flexibly adapt to different installation scenarios and box design requirements.This integrated structure design does not require additional adapter components, which ensures the reliability of the seal, and improves the efficiency and convenience of production assembly.

Description

Technical Field

[0001] This utility model relates to the field of vent valve technology, specifically a pressure relief explosion-proof valve. Background Technology

[0002] Pressure relief explosion-proof valves are key safety components widely used in sealed enclosures such as new energy battery packs and energy storage equipment. Their main function is to open and release pressure in a timely manner when the air pressure inside the enclosure rises abnormally due to chemical reactions or temperature changes, so as to prevent the enclosure from expanding or exploding due to overpressure.

[0003] Currently, common products in this technology typically employ a design that places the pressure spring at the bottom of the valve body. This traditional design has gradually revealed some inherent flaws in practice: First, the bottom-mounted spring is susceptible to the complex environment within the housing, such as foreign object intrusion or corrosion, which can cause the valve plate to jam during movement, affecting the timeliness and reliability of the pressure relief response. Second, the bottom-mounted spring layout often requires significant internal space within the housing, contradicting the trend towards miniaturization and high energy density in equipment. Furthermore, some designs use bolts to secure the bottom spring; under continuous vibration, these bolts risk loosening or even falling off. This hazard is particularly prominent in electrically charged equipment such as new energy battery packs, potentially leading to complete valve failure and serious safety accidents.

[0004] Therefore, existing pressure relief explosion-proof valves still need improvement in terms of reliability, space utilization, and safety. The market urgently needs a new solution with optimized structure and more stable performance.

[0005] A search revealed a Chinese patent document disclosing a pressure relief structure and explosion-proof valve [Application No.: 202323019083.2, Publication No.: CN221304916U], comprising: a piston with a first air hole, the inner wall of one end of the piston having a first annular groove; a pressure plate with a first through hole, which is disposed on the first annular groove; and an end cap with a built-in receiving cavity, the bottom side of which has a second through hole, one end of the end cap having the built-in receiving cavity extending into the piston and fixedly connected. Although this patent achieves bidirectional pressure balance through a piston and a double elastic element structure, the present invention adopts an integrated valve body structure with a spring on top, which is simpler in structure, effectively avoids the risk of bolt loosening, and adapts to different installation requirements through changes in the shape of the valve body itself. Utility Model Content

[0006] In view of the problems existing in the prior art, the purpose of this utility model is to provide a pressure relief explosion-proof valve.

[0007] A pressure relief explosion-proof valve, characterized in that it comprises: a valve body, a top cover, a pressure spring, a pressure relief valve plate, a first sealing ring, and a second sealing ring; The upper cover is located on the upper part of the valve body, and its inner wall is provided with buckles; The valve body has an axial guide hole at its center and a slot on its surface that engages with the snap fastener of the upper cover. The lower surface of the pressure relief valve plate mates with the upper end face of the valve body, and a guide post is provided on the lower surface of the pressure relief valve plate, which slides in conjunction with the guide hole of the valve body. The pressure spring is disposed between the upper cover and the pressure relief valve plate; The first sealing ring is disposed between the pressure relief valve plate and the valve body; The second sealing ring is located at the lower end of the valve body.

[0008] Preferably, the valve body is a cylindrical structure with external threads at the bottom.

[0009] The above technical solution enables a reliable connection between the pressure relief explosion-proof valve and the pipeline or equipment, improving the ease of valve installation and sealing effect. The cylindrical structure with external threads at the bottom of the valve body allows it to be easily screwed into the corresponding threaded interface, forming a firm connection and preventing loosening or leakage caused by pressure fluctuations, thereby effectively improving the safety and stability of the system.

[0010] Specifically, the use of a cylindrical valve body structure with external threads at the bottom allows for quick installation and disassembly, facilitating on-site maintenance and replacement, saving construction time, and reducing labor costs. Simultaneously, the threaded connection ensures a tight fit between the valve body and the pipeline, enhancing connection sealing performance and reducing the risk of gas leakage due to poor interface sealing. This structure also boasts excellent adaptability, applicable to various pipe specifications and operating environments, meeting the needs of different systems.

[0011] Preferably, the valve body has a flange-shaped structure.

[0012] The above technical solution enables a high-strength connection and efficient sealing between the pressure relief explosion-proof valve and the pipeline or equipment. The valve body adopts a flange-shaped structural design, which allows for easy docking. Bolt fastening provides a more stable and reliable installation method, effectively improving the system's safety and pressure resistance.

[0013] Specifically, the flange structure not only facilitates installation and disassembly but also achieves a large-area contact seal, significantly improving the sealing performance at the interface and reducing the risk of leakage due to pressure fluctuations or long-term operation. Furthermore, this structure is suitable for various pipe and equipment specifications, possessing excellent versatility and adaptability. The flange connection method also facilitates maintenance and replacement, benefiting the system's later maintenance and management.

[0014] Preferably, the outer diameter of the guide post is matched with the inner diameter of the guide hole on the valve body.

[0015] The above technical solution ensures that the pressure relief valve disc moves smoothly along the set axial direction during opening and closing, preventing the valve disc from tilting, jamming, or shifting. The outer diameter of the guide post matches the inner diameter of the guide hole on the valve body, achieving a precise fit between the two, thereby improving the guiding accuracy of the valve disc movement and the sealing effect.

[0016] Specifically, the appropriate clearance between the guide post and the guide hole effectively prevents the pressure relief valve plate from swaying or operating eccentrically during stress, ensuring it remains in the correct working position and guaranteeing full contact between the valve plate and the sealing surface, further improving the valve's sealing performance and operational reliability. Simultaneously, this mating structure reduces wear between components, extends the valve's service life, and lowers maintenance costs.

[0017] Preferably, the size of the first sealing ring is adapted to the contact area of ​​the valve body and the pressure relief valve plate.

[0018] The above technical solution ensures a tight seal between the first sealing ring and the valve body and pressure relief valve plate, significantly improving the airtightness and safety performance of the pressure relief explosion-proof valve during operation. The size of the first sealing ring is matched to the contact area of ​​both, allowing the sealing ring to fully cover critical sealing parts and effectively preventing the formation of leakage channels.

[0019] Specifically, the optimized design of the sealing ring coverage area ensures that the pressure relief valve disc maintains a tight and uniform contact with the valve body throughout opening and closing, thereby enhancing the valve's sealing capability. This not only adapts to the effects of pressure changes and prevents media leakage but also reduces safety hazards caused by seal failure. Furthermore, this structure reduces wear and aging of the sealing ring, contributing to a longer service life for the explosion-proof valve.

[0020] Preferably, the pressure spring is sleeved outside the guide post, with its two ends abutting against the inner wall of the upper cover and the upper surface of the pressure relief valve plate, respectively.

[0021] The above technical solution ensures that the pressure spring remains stable during operation and effectively transmits its force to the pressure relief valve plate, thus achieving reliable pressure control. The pressure spring is sleeved on the outside of the guide post, with its two ends abutting against the inner wall of the top cover and the upper surface of the pressure relief valve plate, respectively, making the spring installation more secure and preventing it from shifting, tilting, or deforming during operation.

[0022] Specifically, the spring is fitted around the guide post, which, with the guide post's positioning function, ensures that the spring is evenly stressed in the axial direction. This effectively prevents lateral forces caused by improper installation, thus ensuring more sensitive and stable operation of the pressure relief valve plate. Simultaneously, the fixing method at both ends ensures that the pressure relief valve plate is promptly pushed back to its original position by the spring force when subjected to external pressure, achieving automatic pressure relief and reset functions, thereby improving the reliability and safety of valve operation. Furthermore, this structural design facilitates spring disassembly and replacement, providing convenience for later maintenance.

[0023] Compared with the prior art, the present invention has the following advantages: 1. This utility model replaces the traditional bottom spring and bolt fixing method by placing a pressure spring on the upper part of the valve body and directly engaging and fixing it with the valve body's groove using the buckle of the upper cover. This design simplifies the overall structure, reduces the risk of parts loosening due to vibration, and reduces the space occupied by the valve body inside the sealed box, making the structure more compact and reliable.

[0024] 2. This utility model designs the valve body in different shapes to flexibly adapt to different installation scenarios and housing design requirements. This integrated structural design eliminates the need for additional adapters, ensuring sealing reliability while improving production and assembly efficiency and convenience. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the columnar structure valve body of this utility model; Figure 2 This is a schematic diagram of the flange structure valve body of this utility model.

[0026] In the diagram: 1. Valve body; 2. Top cover; 3. Pressure spring; 4. Pressure relief valve plate; 5. First sealing ring; 6. Second sealing ring. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Please see Figures 1 to 2 This utility model provides a technical solution: A pressure relief explosion-proof valve, characterized in that it comprises: a valve body 1, an upper cover 2, a pressure spring 3, a pressure relief valve plate 4, a first sealing ring 5, and a second sealing ring 6; The upper cover 2 is installed on the upper part of the valve body 1, and its inner wall is provided with buckles; The valve body 1 has an axial guide hole at its center and a slot on its surface that engages with the snap fastener of the upper cover 2. The lower surface of the pressure relief valve plate 4 is matched with the upper end face of the valve body 1. A guide post is provided on the lower surface of the pressure relief valve plate 4, and the guide post is slidably matched with the guide hole of the valve body 1. The pressure spring 3 is disposed between the upper cover 2 and the pressure relief valve plate 4; The first sealing ring 5 is disposed between the pressure relief valve plate 4 and the valve body 1; The second sealing ring 6 is located at the lower end of the valve body 1.

[0029] This pressure relief explosion-proof valve is specifically designed for internal pressure control in sealed enclosures. During installation, two valve body types are available depending on the enclosure structure: a threaded cylindrical structure that can be directly screwed into the enclosure mounting holes, or a flange structure secured with bolts. The valve body 1 forms a reliable seal with the enclosure via the second sealing ring 6. When the internal pressure rises abnormally and exceeds the set pressure, the pressure force overcomes the preload of the pressure spring 3, pushing the pressure relief valve plate 4 upwards along the guide column, opening the pressure relief channel and releasing the high-pressure gas promptly. When the pressure returns to normal, the pressure spring 3 pushes the pressure relief valve plate 4 back to its original position, resealing the enclosure. This design effectively prevents the enclosure from bursting due to overpressure, and the two interchangeable valve body structures significantly improve the product's installation adaptability and application range.

[0030] Specifically, valve body 1 is a cylindrical structure with external threads at the bottom.

[0031] The above technical solution enables a reliable connection between the pressure relief explosion-proof valve and the pipeline or equipment, improving the ease of installation and sealing effect of the valve body 1. The cylindrical structure with external threads at the bottom of the valve body 1 allows it to be easily screwed into the corresponding threaded interface, forming a firm connection and preventing loosening or leakage caused by pressure fluctuations, thereby effectively improving the safety and stability of the system.

[0032] Specifically, the use of a cylindrical valve body 1 with external threads at the bottom allows for quick installation and disassembly, facilitating on-site maintenance and replacement, saving construction time, and reducing labor costs. Simultaneously, the threaded connection ensures a tight fit between the valve body 1 and the pipeline, enhancing connection sealing performance and reducing the risk of gas leakage due to poor interface sealing. This structure also boasts excellent adaptability, enabling its application to various pipeline specifications and working environments to meet the needs of different systems.

[0033] In practical applications, the cylindrical structure with external threads at the bottom not only improves the installation efficiency of the pressure relief explosion-proof valve, but also ensures the firmness and sealing of the connection between the valve body 1 and the system. This technical solution can effectively prevent pressure leakage and safety hazards caused by loose interfaces or sealing failures, and significantly improve the operational reliability and safety level of the entire system.

[0034] Specifically, valve body 1 has a flange-shaped structure.

[0035] The above technical solution enables high-strength connection and efficient sealing between the pressure relief explosion-proof valve and pipelines or equipment. The valve body 1 adopts a flange-shaped structural design, which allows for easy docking. Bolt fastening provides a more stable and reliable installation method, effectively improving the system's safety and pressure resistance.

[0036] Specifically, the flange structure not only facilitates installation and disassembly but also achieves a large-area contact seal, significantly improving the sealing performance at the interface and reducing the risk of leakage due to pressure fluctuations or long-term operation. Furthermore, this structure is suitable for various pipe and equipment specifications, possessing excellent versatility and adaptability. The flange connection method also facilitates maintenance and replacement, benefiting the system's later maintenance and management.

[0037] In practical applications, the pressure relief explosion-proof valve with a flange-shaped valve body 1 can better meet the usage requirements under harsh conditions such as high pressure and explosiveness. This technical solution can significantly improve the operational stability and safety reliability of the system, ensuring that the equipment operates efficiently and safely for a long time.

[0038] Specifically, the outer diameter of the guide post is matched with the inner diameter of the guide hole on valve body 1.

[0039] The above technical solution ensures that the pressure relief valve plate 4 moves smoothly along the set axial direction during opening and closing, preventing tilting, jamming, or displacement of the pressure relief valve plate 4. The outer diameter of the guide column matches the inner diameter of the guide hole on the valve body 1, achieving a precise fit between the two, thereby improving the guiding accuracy and sealing effect of the pressure relief valve plate 4.

[0040] Specifically, the appropriate clearance between the guide post and the guide hole effectively prevents the pressure relief valve plate 4 from shaking or operating eccentrically during stress, ensuring it remains in the correct working position and guaranteeing full contact between the pressure relief valve plate 4 and the sealing surface, further improving the valve's sealing performance and operational reliability. Simultaneously, this mating structure reduces wear between components, extends the valve's service life, and lowers maintenance costs.

[0041] In practical applications, the precise matching of the guide column's outer diameter and the guide hole's inner diameter not only improves the valve's sensitivity and reliability but also effectively reduces the risk of malfunctions caused by component misalignment or jamming. For applications requiring precise operation and high safety, this technical solution ensures that the valve responds quickly and smoothly to abnormal pressure, thereby guaranteeing the stability and safety of the system operation.

[0042] Specifically, the size of the first sealing ring 5 is adapted to the contact area of ​​the valve body 1 and the pressure relief valve plate 4.

[0043] The above technical solution ensures a good seal between the first sealing ring 5, the valve body 1, and the pressure relief valve plate 4, significantly improving the airtightness and safety performance of the pressure relief explosion-proof valve during operation. The size of the first sealing ring 5 is matched to the contact area of ​​both, allowing the sealing ring to fully cover the critical sealing parts and effectively preventing the formation of leakage channels.

[0044] Specifically, the optimized design of the sealing ring coverage area ensures that the pressure relief valve plate 4 maintains tight and uniform contact with the valve body 1 throughout the opening and closing process, thereby enhancing the valve's sealing capability. This not only adapts to the effects of pressure changes and prevents media leakage but also reduces safety hazards caused by seal failure. Furthermore, this structure reduces wear and aging of the sealing ring, contributing to a longer service life for the explosion-proof valve.

[0045] In practical applications, the precise matching of the size of the first sealing ring 5 with the contact area helps improve the overall sealing performance of the pressure relief explosion-proof valve in high-pressure and explosive gas transportation applications. This technical solution ensures long-term stable operation of the system, prevents safety risks caused by media leakage, and maximizes the safety of equipment and operators.

[0046] Specifically, the pressure spring 3 is sleeved outside the guide post, and its two ends abut against the inner wall of the upper cover 2 and the upper surface of the pressure relief valve plate 4, respectively.

[0047] Through the above technical solution, it can be ensured that the pressure spring 3 is always in a stable working state during the force application process, and the spring force can be effectively transmitted to the pressure relief valve plate 4, thus achieving reliable pressure control. The pressure spring 3 is sleeved on the outside of the guide post, and its two ends abut against the inner wall of the upper cover 2 and the upper surface of the pressure relief valve plate 4, respectively, making the installation of the spring more stable and preventing the pressure spring 3 from shifting, tilting or deforming during operation.

[0048] Specifically, the pressure spring 3 is fitted around the guide post, which, with the positioning effect of the guide post, ensures that the pressure spring 3 is evenly stressed in the axial direction. This effectively prevents lateral forces from arising due to improper installation, thus ensuring more sensitive and stable operation of the pressure relief valve plate 4. Simultaneously, the fixing method at both ends ensures that the pressure relief valve plate 4 is promptly pushed back to its original position by the elastic force of the pressure spring 3 when subjected to external pressure, achieving automatic pressure relief and reset functions, thereby improving the reliability and safety of valve operation. Furthermore, this structural design facilitates the disassembly and replacement of the pressure spring 3, providing convenience for later maintenance.

[0049] In practical applications, the above design not only improves the working efficiency and service life of the pressure spring 3, but also effectively ensures that the pressure relief valve plate 4 opens and closes quickly when the system pressure is abnormal, thus strongly protecting the operational safety of the entire explosion-proof valve system. For high-pressure and explosive conditions, this technical solution can minimize safety hazards caused by untimely pressure control and improve the overall safety and reliability of the system.

[0050] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component 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 of this utility model.

[0051] Furthermore, 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0052] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A pressure-relief explosion-proof valve, characterized in that, include: Valve body (1), top cover (2), pressure spring (3), pressure relief valve plate (4), first sealing ring (5), and second sealing ring (6); The upper cover (2) is placed on the upper part of the valve body (1), and its inner wall is provided with buckles; The valve body (1) has an axial guide hole at its center and a slot on the valve body (1) that engages with the buckle of the upper cover (2). The lower surface of the pressure relief valve plate (4) is matched with the upper end face of the valve body (1). A guide post is provided on the lower surface of the pressure relief valve plate (4), and the guide post is slidably matched with the guide hole of the valve body (1). The pressure spring (3) is disposed between the upper cover (2) and the pressure relief valve plate (4); The first sealing ring (5) is disposed between the pressure relief valve plate (4) and the valve body (1); The second sealing ring (6) is located at the lower end of the valve body (1).

2. The pressure relief explosion-proof valve according to claim 1, characterized in that: The valve body (1) is a cylindrical structure with external threads at the bottom.

3. The pressure relief explosion-proof valve according to claim 1, characterized in that: The valve body (1) is a flange-shaped structure.

4. The pressure relief explosion-proof valve according to claim 1, characterized in that: The outer diameter of the guide post is matched with the inner diameter of the guide hole on the valve body (1).

5. The pressure relief explosion-proof valve according to claim 1, characterized in that: The size of the first sealing ring (5) is adapted to the contact area of ​​the valve body (1) and the pressure relief valve plate (4).

6. The pressure relief explosion-proof valve according to claim 1, characterized in that: The pressure spring (3) is sleeved outside the guide post, and its two ends abut against the inner wall of the upper cover (2) and the upper surface of the pressure relief valve plate (4), respectively.

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