CN217482062U

CN217482062U - Semi-sealed automatic pressure relief safety valve

Info

Publication number: CN217482062U
Application number: CN202221193677.8U
Authority: CN
Inventors: 童金林
Original assignee: Wuhan Chuneng New Energy Co ltd
Current assignee: Wuhan Chuneng New Energy Co ltd
Priority date: 2022-05-17
Filing date: 2022-05-17
Publication date: 2022-09-23
Anticipated expiration: 2032-05-17

Abstract

The utility model relates to a technical field of relief valve, concretely relates to semi-enclosed automatic pressure relief valve. Including base, piston member, elastic component, last fastener and valve, go up fastener one end and base fixed connection, the other end and valve bottom fixed connection, go up the inside cavity that is equipped with of fastener, elastic component sets up in last fastener in the cavity, the bottom of base is fixed with battery top cap pressure release mouth, the center of base is equipped with axial through formula piston cavity, piston member passes through elastic component elasticity set up in the piston cavity, the valve includes bottom and the fixed elasticity leaflet of last fastener end, elasticity leaflet has under natural state in the closed form of top polymerization and under the pressure release state in the form of opening of top separation. Can have better leakproofness on the premise of repeated use.

Description

Semi-sealed automatic pressure relief safety valve

Technical Field

The utility model relates to a technical field of relief valve, concretely relates to semi-enclosed automatic pressure relief valve.

Background

Most of the existing reusable sealing valves adopt spring metal structures, rubber pads, metal sheets or metal beads and the like are adopted at an explosion-proof valve port, and after sealing is completed, the internal pressure exceeds a threshold value, so that the internal pressure of the battery can be released, and the battery is sealed again. The sealing valve can be opened under certain internal pressure, but because the internal pressure is prevented from being overlarge, the elasticity of a spring and the like is extremely small, the sealing valve cannot completely isolate the air inside and outside, and the internal structure is corroded by oxygen in the air and the like under long-term use (5 years), so that the problem of failure such as early leakage corrosion of a battery module and the like is caused; on the other hand, if the sealing performance is to be ensured, a large elastic force is required, and the excessive elastic force is not beneficial to the leakage of the internal pressure, which may cause the explosion-proof valve to lose its function.

Another common pressure relief device is provided with incised wound metal foil, and a layer of microporous plastic film is covered outside the incised wound metal foil, so that external water can be prevented from entering the pressure relief device. However, the explosion venting valve is a disposable explosion venting device, and when the incised metal foil cracks, the external plastic film can not prevent external air from entering, so that the service life of the battery is seriously shortened.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a semi-sealed automatic pressure release relief valve to prior art's defect, can have better leakproofness under repeatedly usable's prerequisite.

The utility model discloses a semi-sealed automatic pressure release relief valve, including base, piston member, elastic component, last fastener and valve, go up fastener one end and base fixed connection, the other end and valve bottom fixed connection, go up the inside cavity that is equipped with of fastener, elastic component sets up in last fastener in the cavity, the bottom of base is fixed with battery top cap pressure release mouth, the center of base is equipped with axial through type piston chamber, piston member passes through elastic component elasticity set up in the piston intracavity, the valve includes bottom and last fastener end fixing's elasticity valve leaflet, the elasticity valve leaflet has under natural state in the closed form of top polymerization and under the pressure release state in the form of opening of top separation.

Preferably, the piston cavity is a tapered cavity with a gradually increasing caliber from bottom to top, and the bottom of the piston member is a tapered structure body in sliding fit with the tapered cavity.

Preferably, the piston member includes a piston and a piston bead fixed to the top of the piston, the piston is a conical structure body in sliding fit with the conical cavity, and the piston bead is elastically matched with the elastic member.

Preferably, one end, facing the valve, of the cavity of the upper fastener is provided with a limiting end face, and the elastic component is elastically arranged between the piston bead and the limiting end face.

It is comparatively preferred, the base passes through the one end threaded connection of external screw thread and last fastener, go up the fastener the terminal surface with closely be provided with the sealing washer between the terminal surface of base.

Preferably, the resilient leaflets of the valve are arcuate leaflets, which in the closed configuration form a bulbous top of the valve.

The beneficial effects of the utility model are that:

1. elastic sealing of the piston component and the base piston cavity is realized by arranging the elastic component in the upper fastener. The valve is arranged at the end part of the upper fastener and comprises an elastic valve leaf with the bottom part fixed with the end part of the upper fastener, and the elastic valve leaf has a closed shape polymerized at the top part under the natural state and an open shape separated at the top part under the pressure relief state. The valve structure can be opened under the action of pressure to realize pressure relief, and can automatically return to a closed state after the relief valve is exploded, so that water can be prevented from entering, air can be prevented from entering and circulating, and the relief valve has good sealing property.

2. The valve is arranged into the arc valve leaves, and the spherical top of the valve is formed in a closed state, and the arc valve leaves can always keep the appearance of the arc structure under the action of stress after being exploded for many times, so that the spherical top in the closed state is not easy to deform, the polymerization effect is good, and the sealing performance is good.

3. The piston component is formed by combining a piston with a conical structure body and a piston bead, the conical structure body can realize sealing, sliding and limiting of a piston cavity, the piston bead can realize elastic matching with a spring, and the piston component can realize multifunctional compounding through simple structural combination and is beneficial to the structural simplification design of the pressure release valve.

Drawings

FIG. 1 is a schematic view of the present invention;

FIG. 2 is a schematic view of the piston member of the present invention;

FIG. 3 is a schematic view of the base of the present invention;

fig. 4 is a schematic view of the connection between the base, the piston and the spring of the present invention.

In the figure: 1-upper fastener, 2-valve, 201-elastic valve leaf, 3-base, 301-piston cavity, 4-piston member, 401-piston bead, 402-piston, 5-elastic member.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application clearer, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, refer to an orientation or positional relationship illustrated in the drawings for convenience in describing the present application and to simplify description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating 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 the present application, "a plurality" means two or more unless specifically limited otherwise.

Example one

Fig. 1 to 4 are schematic structural views illustrating a semi-sealed automatic pressure relief safety valve according to a preferred embodiment of the present application, and for convenience of description, only the parts related to the embodiment are shown, which are detailed as follows:

a semi-sealed automatic pressure relief safety valve comprises a base 3, a piston member 4, an elastic member 5, an upper fastener 1 and a valve 2, wherein one end of the upper fastener 1 is fixedly connected with the base 3, the other end of the upper fastener is fixedly connected with the bottom of the valve 2, a cavity is arranged in the upper fastener 1, the elastic member 5 is arranged in the cavity of the upper fastener 1, the bottom of the base 3 is fixed with a pressure relief opening of a battery top cover, an axial through type piston cavity 301 is arranged in the center of the base 3, the piston member 4 is elastically arranged in the piston cavity 301 through the elastic member 5, the valve 2 comprises an elastic valve leaflet 201 with the bottom fixed with the end of the upper fastener 1, and the elastic valve leaflet 201 has a closed state of being polymerized at the top in a natural state and an open state of being separated from the top in a pressure relief state.

In one embodiment, the piston cavity 301 is a tapered cavity with an aperture gradually increasing from the bottom to the top, and the bottom of the piston member 4 is a tapered structure body slidably fitted with the tapered cavity.

In one embodiment, the piston member 4 comprises a piston 402 and a piston bead 401 fixed on the top of the piston 402, the piston 402 is a cone-shaped structure body slidably fitted with the cone-shaped cavity, and the piston bead 401 is elastically fitted with the elastic member 5.

In one embodiment, the cavity of the upper fastener 1 has a limiting end surface facing the valve 2, and the elastic member 5 is elastically disposed between the piston bead 401 and the limiting end surface.

In one embodiment, the base 3 is connected with one end of the upper fastener 1 through an external thread, and a sealing ring is tightly arranged between the end surface of the upper fastener 1 and the end surface of the base 3. After the upper fastener 1 is connected with the base, the sealing ring can be clamped tightly, and the sealing of the valve body is realized.

In one embodiment, the resilient leaflets 201 of the valve 2 are arc-shaped leaflets, the resilient leaflets 201 forming a bulbous top of the valve 2 in the closed configuration.

In one embodiment, the elastic member 5 is a spring, the inner diameter of the spring is smaller than the diameter of the piston bead 401, one end of the spring is elastically contacted with the end face of the limit in the upper fastener 1, and the other end of the spring is elastically contacted with the piston bead 401, so that the sealing of the conical structural body at the bottom of the piston and the piston cavity is realized through the elastic force of the spring.

The working principle of the device is as follows:

when the internal pressure of the battery core is small, the piston is tightly matched with the piston cavity under the action of the elastic force of the spring, and sealing is realized. When electric core internal pressure reached certain threshold value, can overcome the elasticity of spring, with piston jack-up that makes progress, formed the pressure release passageway between piston chamber and the piston, pressure concentrates on the inside of valve 2 through the inside cavity of last fastener, with the elasticity leaflet of valve 2 in center department jack-out to realize the pressure release of electric core. When the pressure drops below the threshold value, the piston is sealed with the piston cavity under the action of the spring, the elastic valve leaflets 201 return to a natural arc state and are polymerized at the center position again to form the spherical top of the valve 2, so that the external water and air are blocked, and the sealing of the pressure release valve is realized.

According to different pressure relief threshold requirements, the length of the spring, the elastic force, the thickness of the elastic valve leaf and the radian of the elastic valve leaf can be adjusted, so that the control of the internal pressure is realized.

The above-mentioned embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.

Claims

1. The utility model provides a semi-enclosed automatic pressure release relief valve which characterized in that: comprises a base (3), a piston component (4), an elastic component (5), an upper fastener (1) and a valve (2), one end of the upper fastener (1) is fixedly connected with the base (3), the other end is fixedly connected with the bottom of the valve (2), a cavity is arranged in the upper fastener (1), the elastic component (5) is arranged in the cavity of the upper fastener (1), the bottom of the base (3) is fixed with a pressure relief opening of a battery top cover, an axial through type piston cavity (301) is arranged in the center of the base (3), the piston member (4) is elastically arranged in the piston cavity (301) through the elastic member (5), the valve (2) comprises an elastic valve leaf (201) with the bottom fixed with the end of the upper fastener (1), the resilient leaflets (201) have a closed configuration converging at the top in a natural state and an open configuration diverging at the top in a decompressed state.

2. The semi-sealed automatic pressure relief safety valve of claim 1, wherein: the piston cavity (301) is a conical cavity with the caliber gradually increased from the bottom to the top, and the bottom of the piston component (4) is a conical structure body in sliding fit with the conical cavity.

3. The semi-sealed automatic pressure relief safety valve of claim 2, wherein: the piston member (4) comprises a piston (402) and a piston bead (401) fixed to the top of the piston (402), the piston (402) is a conical structure body in sliding fit with the conical cavity, and the piston bead (401) and the elastic member (5) are arranged in an elastic fit mode.

4. The semi-sealed automatic pressure relief safety valve of claim 3, wherein: the cavity of the upper fastener (1) is provided with a limiting end face towards one end of the valve (2), and the elastic component (5) is elastically arranged between the piston bead (401) and the limiting end face.

5. The semi-sealed automatic pressure relief safety valve of claim 1, wherein: the base (3) is in threaded connection with one end of the upper fastener (1) through external threads, and a sealing ring is tightly arranged between the end face of the upper fastener (1) and the end face of the base (3).

6. The semi-sealed automatic pressure relief safety valve of claim 1, wherein: the elastic valve leaflet (201) of the valve (2) is an arc-shaped valve leaflet, and the elastic valve leaflet (201) forms the spherical top of the valve (2) in a closed form.