High efficiency seal explosion-proof valve

Abstract

The utility model discloses a kind of high-efficiency sealing explosion-proof valves, it includes valve body, the piston assembly being set in the valve body and being opened or closed relative to valve body and the spring being set between piston assembly and valve body, the piston assembly is closed pressure relief hole of valve body under the spring elasticity effect, the valve body bottom surface is provided with outer sealing ring for being sealed with mounting interface assembly, gap is formed between the valve body bottom surface and mounting interface, it is characterized in that: the valve body bottom surface outer edge is provided with apron sealing ring, the apron sealing ring has the apron protruding from the valve body bottom surface, the apron is extruded contact with mounting interface to form sealed assembly, to block the outer opening of gap, even in some such as high temperature, high humidity, high salt etc. Special working conditions, the added apron sealing ring can effectively prevent medium from entering the gap between valve body and mounting interface, prevent the occurrence of gap corrosion, and further improve product service life.

Description

Technical fields:

[0001] This utility model relates to the technical field of explosion-proof valve products, and specifically to a high-efficiency sealing explosion-proof valve. Background technology:

[0002] Chinese utility model patent application number 202121510014.X discloses an explosion-proof valve, which includes: a valve seat, a valve core, and a limiting member; the valve core is movably mounted on the valve seat, and the limiting member is connected to the valve core; the explosion-proof valve has a first pressure limiting state and a second pressure limiting state; in the first pressure limiting state, the valve core opens relative to the valve seat and drives the limiting member to abut against the valve seat; at this time, pressure is released through the channel between the valve core and the valve seat; in the second pressure limiting state, the limiting member detaches from the valve core, the valve core separates from the valve seat, and thus the valve seat is no longer blocked by the valve core, thereby maximizing the opening degree and achieving rapid pressure release, thus achieving the purpose of improving the pressure release and explosion-proof efficiency.

[0003] The bottom surface of the valve seat is equipped with a second sealing element. The valve seat is sealed to the installation interface through the second sealing element. Since the second sealing element needs to be squeezed and deformed to achieve a seal with the installation interface, the bottom surface of the valve seat and the installation interface cannot be completely fitted together. As a result, a certain gap will be formed between the outer part of the bottom surface of the valve seat (i.e. the outer part of the second sealing element) and the installation interface. Under some special working conditions such as high temperature, high humidity, and high salt, the gap will have media residue, which will cause gap corrosion, and then corrode the valve seat, affecting its service life.

[0004] In view of the above, the inventors propose the following technical solution. Utility Model Content:

[0005] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a high-efficiency sealing explosion-proof valve.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: the high-efficiency sealing explosion-proof valve includes a valve body, a piston assembly disposed in the valve body and capable of opening or closing relative to the valve body, and a spring disposed between the piston assembly and the valve body. The piston assembly closes the pressure relief hole of the valve body under the elastic force of the spring. The bottom surface of the valve body is provided with an outer sealing ring for sealing assembly with the installation interface. A gap is formed between the bottom surface of the valve body and the installation interface. The feature is that: a skirt sealing ring is provided at the outer edge of the bottom surface of the valve body. The skirt sealing ring has a skirt protruding from the bottom surface of the valve body. The skirt is pressed and contacted with the installation interface to form a sealing assembly to seal the outer opening of the gap.

[0007] Furthermore, in the above technical solution, a stepped groove is provided at the outer edge of the bottom surface of the valve body, and the skirt sealing ring is fitted and fixed in the stepped groove.

[0008] Furthermore, in the above technical solution, the contact area between the stepped groove and the skirt sealing ring is also fixed by adhesive.

[0009] Furthermore, in the above technical solution, a stepped groove is provided at the outer edge of the bottom surface of the valve body, and the inner wall of the stepped groove is coated with an adhesive layer; the skirt sealing ring is integrally fixed in the stepped groove by vulcanization molding of rubber material.

[0010] Furthermore, in the above technical solution, the skirt sealing ring includes a sealing ring body and a skirt integrally formed on the lower outer side of the sealing ring body and extending downward at an angle.

[0011] Furthermore, in the above technical solution, the installation interface is provided with a screw hole, and the valve body is provided with a through hole that passes through the upper and lower end faces. The screw passes through the through hole and is screwed into the screw hole to fix the valve body to the installation interface. The upper surface of the installation interface is formed with a raised ring around the screw hole, and the bottom surface of the valve body is provided with a groove around the through hole. The raised ring is also embedded in the groove to achieve positioning.

[0012] Furthermore, in the above technical solution, the outer sealing ring is a raised dot sealing ring. The inner side of the outer sealing ring is provided with multiple spaced inner raised dots, and the outer side of the outer sealing ring is provided with multiple spaced outer raised dots. After the outer sealing ring is embedded in the mounting groove provided on the bottom surface of the valve body, the outer raised dots contact the outer groove wall of the mounting groove, and the inner raised dots contact the inner groove wall of the mounting groove to be positioned in the mounting groove. The lower end of the outer sealing ring protrudes out of the bottom surface of the valve body.

[0013] Furthermore, in the above technical solution, the valve body is provided with a guide hole at its center; the piston assembly includes a piston and a guide rod connected to the middle of the lower end of the piston, the guide rod passes through the guide hole and can move relative to the guide hole, and an inner sealing ring is provided between the piston and the valve body; the spring is sleeved around the guide rod, and the upper end of the spring contacts the outer periphery of the guide hole, and the lower end of the spring forms a boss contact with the lower end of the guide rod.

[0014] Furthermore, in the above technical solution, the piston and the guide rod are fixedly connected by a snap fastener, or by a threaded screw, or by an inlay.

[0015] Furthermore, in the above technical solution, a protective sleeve is also fitted at the lower end of the valve body. The protective sleeve covers the periphery of the guide rod and the spring and forms a gap.

[0016] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art: A skirt sealing ring is provided at the outer edge of the bottom surface of the valve body in the present invention. The skirt sealing ring has a skirt protruding from the bottom surface of the valve body. The skirt is pressed and contacted with the installation interface to form a sealed assembly to block the external opening of the gap. Even under some special working conditions such as high temperature, high humidity, and high salt, the added skirt sealing ring can effectively prevent the medium from entering the gap between the valve body and the installation interface, prevent the occurrence of gap corrosion, and thus improve the service life of the product. Attached image description:

[0017] Figure 1 This is a perspective view of the present invention;

[0018] Figure 2 This is a perspective view of the present invention from another angle;

[0019] Figure 3 This is a partial exploded view of the present invention;

[0020] Figure 4 This is a cross-sectional view of the present invention;

[0021] Figure 5 This is a perspective view of the skirt sealing ring in this utility model;

[0022] Figure 6 This is a structural diagram of the installation interface in this utility model;

[0023] Figure 7 This is an assembly diagram of the utility model and the installation interface;

[0024] Figure 8 This is a cross-sectional view of the utility model and its installation interface. Detailed implementation method:

[0025] The present invention will be further described below with reference to specific embodiments and accompanying drawings.

[0026] See Figure 1-8 As shown, this is a high-efficiency sealing explosion-proof valve that can be used on objects such as the sealed housing of a battery pack. It is used to release pressure when the internal cavity of the sealed housing of the battery pack becomes too high, thereby achieving the purpose of explosion prevention.

[0027] This utility model of a high-efficiency sealing explosion-proof valve includes a valve body 1, a piston assembly 2 disposed in the valve body 1 and capable of opening or closing relative to the valve body 1, and a spring 3 disposed between the piston assembly 2 and the valve body 1. Under the elastic force of the spring 3, the piston assembly 2 closes the pressure relief hole 10 of the valve body 1. When the pressure is too high, the piston assembly 2 is driven to move outward to compress the spring 3. At this time, the pressure relief hole 10 is in a pressure relief state, which achieves the pressure relief explosion-proof function. After the pressure relief is completed, the spring 3 resets and generates a restoring force to drive the piston assembly 2 to reset under the spring 3, so that the piston assembly 2 closes the pressure relief hole 10 of the valve body 1.

[0028] In use, the valve body 1 is installed on the mounting interface 6 (such as the sealing surface of a battery pack housing) and fixed to the mounting interface 6 by screws or other means. Since an outer sealing ring 4 is provided on the bottom surface of the valve body 1, protruding beyond the bottom surface of the valve body 1, a gap 60 is formed between the bottom surface of the valve body 1 and the mounting interface 6 after the valve body 1 is installed on the mounting interface 6. To seal this gap and prevent the medium from entering the gap 60 between the valve body 1 and the mounting interface 6, thus preventing gap corrosion... To improve product lifespan, the following design was implemented: A skirt sealing ring 5 is provided at the outer edge of the bottom surface of the valve body 1. The skirt sealing ring 5 has a skirt 52 protruding from the bottom surface of the valve body 1. The skirt 52 is pressed and contacted with the mounting interface 6 to form a sealing assembly, thereby sealing the external opening of the gap 60. Even under special working conditions such as high temperature, high humidity, and high salt, the added skirt sealing ring 5 can effectively prevent the medium from entering the gap between the valve body and the mounting interface, prevent gap corrosion, and thus improve product lifespan.

[0029] The assembly and fixing methods of the skirt sealing ring 5 and the valve body 1 include at least the following:

[0030] The first type: A stepped groove 11 is provided at the outer edge of the bottom surface of the valve body 1, and the skirt sealing ring 5 is fitted and fixed in the stepped groove 11, which is fastened by interference fit.

[0031] The second method involves further fixing the stepped groove 11 to the skirt sealing ring 5 by adhesive, making it less likely for the skirt sealing ring 5 to detach.

[0032] The third type: A stepped groove 11 is provided at the outer edge of the bottom surface of the valve body 1, and the inner wall of the stepped groove 11 is coated with an adhesive layer; the skirt sealing ring 5 is integrally fixed in the stepped groove 11 by vulcanization molding of rubber material, and its assembly structure is the most stable. The specific assembly method is as follows: First, glue is applied to the inner wall of the stepped groove 11 and dried to form an adhesive layer. Then, the valve body is placed in the mold, rubber material is injected, pressure and heat are maintained, and the skirt sealing ring and the valve body are integrally vulcanized in the mold to form an integral structure. Its structure is strong, the skirt sealing ring is not easy to fall off, and the sealing performance of the skirt sealing ring can be guaranteed.

[0033] This embodiment, as a preferred embodiment, adopts the third assembly method.

[0034] The skirt sealing ring 5 includes a sealing ring body 51 and a skirt 52 integrally formed on the lower outer side of the sealing ring body 51 and extending obliquely downward. The skirt 52 of the skirt sealing ring 5 extends obliquely beyond the bottom surface of the valve body 1 to form a more effective seal when in contact with the mounting interface 6.

[0035] To ensure a more stable assembly between the valve body 1 and the mounting interface 6 in this invention, the following design is implemented: the mounting interface 6 is provided with a screw hole 61, and the valve body 1 is provided with a through hole 12 penetrating the upper and lower end faces. A screw passes through the through hole 12 and is screwed into the screw hole 61 to fix the valve body 1 onto the mounting interface 6. Furthermore, to enable quick alignment between the through hole 12 and the screw hole 61, the following design is implemented: a raised ring 62 is formed on the upper surface of the mounting interface 6 around the screw hole 61, and a recessed groove 13 is provided on the bottom surface of the valve body 1 around the through hole 12. The raised ring 62 is also embedded in the recessed groove 13 for positioning, thereby enabling quick alignment between the through hole 12 and the screw hole 61, improving assembly efficiency, and making the assembly between the valve body 1 and the mounting interface 6 more stable.

[0036] In this embodiment, the outer sealing ring 4 is a raised dot sealing ring. The inner side of the outer sealing ring 4 is provided with a plurality of spaced inner raised dots 41, and the outer side of the outer sealing ring 4 is provided with a plurality of spaced outer raised dots 42. After the outer sealing ring 4 is embedded in the mounting groove 14 provided on the bottom surface of the valve body 1, the outer raised dots 42 contact the outer groove wall of the mounting groove 14, and the inner raised dots 41 contact the inner groove wall of the mounting groove 14 to be positioned in the mounting groove 14. The lower end of the outer sealing ring 4 protrudes out of the bottom surface of the valve body 1. After the raised dot sealing ring is assembled with the mounting groove 14, the inner and outer walls of the raised dot sealing ring and the inner and outer groove walls of the mounting groove 14 form a certain space, which allows the raised dot sealing ring to have enough space to form elastic deformation, so that it will not deform and protrude too much to press against the mounting interface 6.

[0037] The valve body 1 has a guide hole at its center; the piston assembly 2 includes a piston 21 and a guide rod 22 connected to the middle of the lower end of the piston 21. The guide rod 22 passes through the guide hole and can move relative to the guide hole. An inner sealing ring 7 is provided between the piston 21 and the valve body 1; the spring 3 is sleeved around the guide rod 22, and the upper end of the spring 3 contacts the outer periphery of the guide hole. The lower end of the spring 3 forms a boss 221 that contacts the lower end of the guide rod 22. This allows the spring 3 to be stabilized between the valve body 1 and the guide rod 22, and to increase the downward elastic force of the entire piston assembly 2, thereby better sealing the pressure relief hole 10 of the valve body 1.

[0038] The piston 21 and guide rod 22 are fixedly connected by a snap-fit, a threaded screw, or an inlay. In this embodiment, a threaded screw connection is used, which is the simplest and most efficient to install.

[0039] The lower end of the valve body 1 is also fitted with a protective sleeve 8, which covers the outer periphery of the guide rod 22 and the spring 3 and forms a gap so as not to affect the normal operation of the guide rod 22 and the spring 3. At the same time, the protective sleeve 8 can effectively prevent foreign objects from entering the spring 3 and affecting the normal use of the spring.

[0040] In summary, the valve body 1 of this invention has a skirt sealing ring 5 at the outer edge of its bottom surface. The skirt sealing ring 5 has a skirt 52 protruding from the bottom surface of the valve body 1. The skirt 52 is pressed and contacted with the mounting interface 6 to form a sealed assembly, thereby sealing the external opening of the gap 60. Even under special working conditions such as high temperature, high humidity, and high salt, the added skirt sealing ring 5 can effectively prevent the medium from entering the gap between the valve body and the mounting interface, prevent gap corrosion, and thus improve the service life of the product.

[0041] Of course, the above description is only a specific embodiment of the present utility model and is not intended to limit the scope of the present utility model. All equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model should be included in the scope of the claims of the present utility model.

Claims

1. A high-efficiency sealing explosion-proof valve, comprising a valve body (1), a piston assembly (2) disposed in the valve body (1) and capable of opening or closing relative to the valve body (1), and a spring (3) disposed between the piston assembly (2) and the valve body (1), wherein the piston assembly (2) closes the pressure relief hole (10) of the valve body (1) under the elastic force of the spring (3), wherein the bottom surface of the valve body (1) is provided with an outer sealing ring (4) for sealing assembly with a mounting interface (6), and a gap (60) is formed between the bottom surface of the valve body (1) and the mounting interface (6), characterized in that: A skirt sealing ring (5) is provided at the outer edge of the bottom surface of the valve body (1). The skirt sealing ring (5) has a skirt (52) protruding from the bottom surface of the valve body (1). The skirt (52) is pressed and contacted with the mounting interface (6) to form a sealing assembly to block the outer opening of the gap (60).

2. The high-efficiency sealing explosion-proof valve according to claim 1, characterized in that: A stepped groove (11) is provided at the outer edge of the bottom surface of the valve body (1), and the skirt sealing ring (5) is fitted and fixed in the stepped groove (11).

3. The high-efficiency sealing explosion-proof valve according to claim 2, characterized in that: The stepped groove (11) and the skirt sealing ring (5) are also fixed by adhesive.

4. The high-efficiency sealing explosion-proof valve according to claim 1, characterized in that: The valve body (1) has a stepped groove (11) at the outer edge of the bottom surface, and the inner wall of the stepped groove (11) is coated with an adhesive layer; the skirt sealing ring (5) is integrally fixed in the stepped groove (11) by vulcanization molding of rubber material.

5. The high-efficiency sealing explosion-proof valve according to claim 1, characterized in that: The skirt sealing ring (5) includes a sealing ring body (51) and a skirt (52) integrally formed on the lower outer side of the sealing ring body (51) and extending downward at an angle.

6. A high-efficiency sealing explosion-proof valve according to any one of claims 1-5, characterized in that: The installation interface (6) is provided with a screw hole (61), and the valve body (1) is provided with a through hole (12) that passes through the upper and lower end faces. The screw passes through the through hole (12) and is screwed to the screw hole (61) to fix the valve body (1) on the installation interface (6). The upper surface of the installation interface (6) is formed with a convex ring (62) around the screw hole (61), and the bottom surface of the valve body (1) is provided with a groove (13) around the through hole (12). The convex ring (62) is also embedded in the groove (13) to achieve positioning.

7. The high-efficiency sealing explosion-proof valve according to claim 6, characterized in that: The outer sealing ring (4) is a raised sealing ring. The inner side of the outer sealing ring (4) is provided with a plurality of spaced inner raised points (41), and the outer side of the outer sealing ring (4) is provided with a plurality of spaced outer raised points (42). After the outer sealing ring (4) is embedded in the mounting groove (14) provided on the bottom surface of the valve body (1), the outer raised point (42) contacts the outer groove wall of the mounting groove (14), and the inner raised point (41) contacts the inner groove wall of the mounting groove (14) to be positioned in the mounting groove (14), and the lower end of the outer sealing ring (4) protrudes out of the bottom surface of the valve body (1).

8. The high-efficiency sealing explosion-proof valve according to claim 6, characterized in that: The valve body (1) has a guide hole at its center; the piston assembly (2) includes a piston (21) and a guide rod (22) connected to the middle of the lower end of the piston (21). The guide rod (22) passes through the guide hole and can move relative to the guide hole. An inner sealing ring (7) is provided between the piston (21) and the valve body (1); the spring (3) is sleeved around the guide rod (22), and the upper end of the spring (3) contacts the outer periphery of the guide hole. The lower end of the spring (3) forms a boss (221) with the lower end of the guide rod (22).

9. The high-efficiency sealing explosion-proof valve according to claim 8, characterized in that: The piston (21) and the guide rod (22) are fixedly connected by a snap fastener, or by a threaded screw, or by an inlay.

10. A high-efficiency sealing explosion-proof valve according to claim 8, characterized in that: The lower end of the valve body (1) is also fitted with a protective sleeve (8), which covers the outer periphery of the guide rod (22) and the spring (3) and forms a gap.

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