CN216413206U

CN216413206U - Directional pressure relief and dustproof explosion-proof valve

Info

Publication number: CN216413206U
Application number: CN202122548769.5U
Authority: CN
Inventors: 童永平
Original assignee: Huizhou Voir Science & Technology Co ltd
Current assignee: Huizhou Voir Science & Technology Co ltd
Priority date: 2021-10-21
Filing date: 2021-10-21
Publication date: 2022-04-29
Anticipated expiration: 2031-10-21

Abstract

The utility model discloses a directional pressure relief and dustproof explosion-proof valve, which comprises: the main body comprises a first front surface and a first back surface which are oppositely arranged, the main body is provided with an exhaust hole which penetrates through the first front surface and the first back surface, the main body is provided with an installation shaft hole, and the installation shaft hole penetrates through the first front surface and the first back surface; the fixing seat is arranged on the first back face and provided with a second front face and a second back face, a first through hole is formed in the fixing seat and penetrates through the second front face and the second back face, and a second front face sealing cover is arranged on the exhaust hole and the mounting shaft hole; the guide shaft penetrates through the mounting shaft hole to be connected with the second front surface, and a second through hole is formed in the guide shaft and communicated with the first through hole; the spring is sleeved on the guide shaft, one end of the spring is abutted against the first front face, and the other end of the spring is abutted against the guide shaft; the diaphragm plate, can waterproof ventilative, set up on the second back to cover first through-hole.

Description

Directional pressure relief and dustproof explosion-proof valve

Technical Field

The utility model relates to the technical field of explosion-proof valves, in particular to an explosion-proof valve with directional pressure relief and dust prevention.

Background

The battery pack system in the field of new energy vehicles is running along a lightweight route at present, the compression resistance of the battery pack is greatly weakened due to the fact that a thinner battery pack shell is generated, and a lower explosion-proof device is needed to meet the safety of the battery pack in a thermal runaway state.

The metal spring type explosion-proof valve on the market at present is mostly built-in spring and direction case structure, but belongs to full-face pressure release explosion-proof valve, and the gland position exposes, and this can cause following defect: 1. when thermal runaway occurs in the battery pack, the explosion-proof valve is opened to carry out full-face pressure relief, and high temperature and high pressure can influence and even damage a wire harness outside the battery pack, so that the battery pack cannot be normally used; 2. the gland position is exposed, and dust or other objects appearing outside the battery pack can block the air inlet and the air outlet at the gland position.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the utility model provides an explosion-proof valve with directional pressure relief and dust prevention, which can solve at least one of the problems in the prior art.

The utility model relates to a directional pressure relief and dustproof explosion-proof valve, which comprises:

the main body is provided with a first front surface and a first back surface, the main body is provided with an exhaust hole penetrating through the first front surface and the first back surface, the main body is provided with an installation shaft hole, and the installation shaft hole penetrates through the first front surface and the first back surface;

the fixing seat is arranged on the first back surface and provided with a second front surface and a second back surface, a first through hole is formed in the fixing seat, the first through hole penetrates through the second front surface and the second back surface, and the second front surface sealing cover is arranged on the exhaust hole and the mounting shaft hole;

the guide shaft penetrates through the mounting shaft hole to be connected with the second front surface, a second through hole is formed in the guide shaft, and the second through hole is communicated with the first through hole;

the spring is sleeved on the guide shaft, one end of the spring is abutted against the first front face, and the other end of the spring is abutted against the guide shaft;

and the membrane plate is waterproof and breathable, is arranged on the second back surface and covers the first through hole.

The directional pressure relief and dust prevention explosion-proof valve provided by the embodiment of the utility model at least has the following beneficial effects: when the explosion-proof valve is in a normal working condition, the fixed seat tightly covers the exhaust hole under the action of the guide shaft and the spring, the exhaust hole is closed, gas in the battery pack cannot be exhausted from the exhaust hole, and the internal environment and the external environment of the battery pack are communicated through the diaphragm plate, the first through hole, the second through hole, the protective sleeve and the third through hole in sequence, so that the internal and external air pressure balance of the battery pack can be ensured; when the unusual operating mode appears, the battery package appears thermal runaway and releases a large amount of gas in the twinkling of an eye, and gas in the battery package can't pass through diaphragm, first through-hole, second through-hole, protective sheath and third through-hole and releases gas fast, leads to the atmospheric pressure in the battery package to rise fast, and under high-pressure gas's effect, the fixing base is promoted, and compression spring compression, the exhaust hole is opened, and gas in the battery package is outwards discharged fast through the exhaust hole, realizes quick pressure release.

According to some embodiments of the utility model, the second back surface is provided with a circular groove, the diaphragm is arranged in the circular groove and fixed in the circular groove through a press-fitting device, the diaphragm divides the circular groove into an inlet cavity at a lower layer and an outlet cavity at an upper layer, the first through hole is communicated with the inlet cavity, and the outlet cavity is communicated with the outside.

According to some embodiments of the utility model, the press-fitting device comprises a press ring, the press ring is press-fitted on the membrane plate, and the press ring is connected with the inner side surface of the circular groove in an interference fit manner.

According to some embodiments of the present invention, the press-fitting device further includes a fixing plate, a slot is formed in an outer edge of the fixing seat, the slot is communicated with the outlet cavity, a third vent hole corresponding to the slot is formed in an outer edge of the fixing plate, the fixing plate is press-fitted to the pressing ring, and the slot is aligned with the third vent hole.

According to some embodiments of the utility model, the press-fitting device further comprises a press cover which is press-fitted on the fixing plate and fixedly connected with the second back surface.

According to some embodiments of the utility model, the protective cover is covered on the first back surface, and the protective cover is provided with a fourth through hole.

According to some embodiments of the utility model, the guide shaft and the second front face are connected by a threaded connection.

According to some embodiments of the utility model, a first seal ring mounting groove is provided on the first back surface, the first seal ring mounting groove being located between the second front surface and the first back surface, a first seal ring being mounted in the first seal ring mounting groove.

According to some embodiments of the utility model, the mounting shaft hole is provided at a middle portion of the exhaust hole.

According to some embodiments of the utility model, the first front face is provided with a second sealing ring mounting groove disposed around the vent hole, the second sealing ring mounting groove having a second sealing ring mounted therein.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is an exploded view of an embodiment of the explosion-proof valve with directional pressure relief and dust prevention of the present invention;

FIG. 2 is a diagram of the explosion-proof valve with directional pressure relief and dust prevention according to the embodiment of the present invention in a normal operating condition;

FIG. 3 is a diagram illustrating a state of the explosion-proof valve with directional pressure relief and dust prevention according to the embodiment of the present invention under an abnormal condition;

FIG. 4 is a schematic view of the installation of the explosion-proof valve with directional pressure relief and dust prevention according to the embodiment of the utility model.

Reference numerals:

100. a main body; 110. a first front surface; 120. a first back surface; 130. an exhaust hole; 140. installing the shaft hole; 150. a third through hole;

200. a fixed seat; 210. a second front surface; 220. a second back surface; 230. a first through hole; 240. a slot;

300. a guide shaft; 310. a second through hole;

400. a spring;

500. an outer hexagonal nut;

600. a diaphragm plate;

710. pressing a ring; 720. a fixing plate; 721. a third vent hole; 730. a gland;

800. a protective cover; 810. a fourth via hole;

910. a first seal ring; 920. and a second seal ring.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.

In addition, the technical solutions in the embodiments of the present invention may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination of technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

As shown in fig. 1 and 2, the explosion-proof valve with directional pressure relief and anti-clogging according to the embodiment of the utility model comprises:

a main body 100 provided with a first front surface 110 and a first back surface 120, the main body 100 being provided with an exhaust hole 130 penetrating the first front surface 110 and the first back surface 120, the main body 100 being provided with an installation shaft hole 140, the installation shaft hole 140 penetrating the first front surface 110 and the first back surface 120;

the fixing seat 200 is arranged on the first back surface 120, the fixing seat 200 is provided with a second front surface 210 and a second back surface 220, the fixing seat 200 is provided with a first through hole 230, the first through hole 230 penetrates through the second front surface 210 and the second back surface 220, and the second front surface 210 is hermetically arranged on the exhaust hole 130 and the mounting shaft hole 140;

the guide shaft 300 penetrates through the mounting shaft hole 140 to be connected with the second front surface 210, a second through hole 310 is formed in the guide shaft 300, and the second through hole 310 is communicated with the first through hole 230;

the spring 400 is sleeved on the guide shaft 300, one end of the spring 400 is abutted with the first front surface 110, and the other end of the spring 400 is abutted with the guide shaft 300;

and a membrane 600, which is waterproof and breathable, disposed on the second rear surface 220 and covers the first through hole 230.

As shown in fig. 2 in conjunction with fig. 4, when the explosion-proof valve of the present invention is mounted on a battery pack, the first front surface 110 of the main body and the battery pack form a sealed chamber. When the explosion-proof valve is in a normal working condition, the fixed seat 200 tightly covers the vent hole 130 under the action of the guide shaft 300 and the spring 400, the vent hole 130 is closed, gas in the battery pack cannot be discharged from the vent hole 130 at the moment, and the internal environment and the external environment of the battery pack sequentially pass through the diaphragm 600, the first through hole 230 and the second through hole 310, so that the internal and external air pressure balance of the battery pack can be ensured. In this case, the gas flow path is: a ← → a.

Combine shown in fig. 3, when unusual operating mode appears, a large amount of gas of thermal runaway instant release appear in the battery package, and gas in the battery package can't pass through lamina membranacea 600, first through-hole 230, second through-hole 310 quick release gas, leads to the atmospheric pressure in the battery package to rise fast, and under high-pressure gas's effect, fixing base 200 is promoted, compression spring 400 compression, and exhaust hole 130 is opened, and gas in the battery package is outwards discharged fast through exhaust hole 130, realizes quick pressure release. In this case, the gas flow path is: c → b.

In some embodiments of the present invention, a circular groove is formed on the second back surface 220, the diaphragm 600 is disposed in the circular groove and fixed in the circular groove by a press-fitting device, the diaphragm 600 divides the circular groove into an inlet cavity at a lower layer and an outlet cavity at an upper layer, the first through hole 230 is communicated with the inlet cavity, and the outlet cavity is communicated with the outside.

In this embodiment, by providing a circular groove on the second back surface 220, the diaphragm 600 is disposed and fixed in the circular groove, and the diaphragm 600 is horizontally disposed in the circular groove, dividing the circular groove into an inlet chamber of the lower layer and an outlet chamber of the upper layer. The gas in the battery pack sequentially passes through the second through hole 310 and the first through hole 230 to be communicated with the inlet cavity, the external gas is communicated with the outlet cavity, airflow interaction is realized at the diaphragm 600, and the stability of internal and external air pressure is ensured.

In a further embodiment of the present invention, the press-fitting device includes a press ring 710, the press ring 710 is press-fitted on the diaphragm 600, and the press ring 710 is connected to the inner side surface of the circular groove by interference fit.

In this embodiment, the pressing ring 710 is press-fitted on the diaphragm 600, the pressing ring 710 is connected with the inner side surface of the circular groove in an interference fit manner, and the pressing ring 710 is clamped in the circular groove, so that the diaphragm 600 is press-fitted and fixed in the circular groove.

In a further embodiment of the present invention, the press-fitting apparatus further includes a fixing plate 720, the outer edge of the fixing base 200 is provided with a slot 240, the slot 240 is communicated with the outlet chamber, the outer edge of the fixing plate 720 is provided with a third vent 721 corresponding to the slot 240, the fixing plate 720 is press-fitted on the pressing ring 710, and the slot 240 is aligned with the third vent 721.

Through setting up fixed plate 720, fixed plate 720 adopts the iron sheet, and fixed plate 720 presses at clamping ring 710 to be in the same place with body 100 fixed connection, prevent that clamping ring 710 from deviating from in the circular recess, further improvement lamina membranacea 600's stability. At the same time, it is necessary to align the slot 240 with the third venting hole 721 to ensure the inside and outside ventilation of the explosion-proof valve.

In a further embodiment of the present invention, the press-fitting device further includes a press-fitting cap 730, and the press-fitting cap 730 is press-fitted on the fixing plate 720 and fixedly connected to the second back surface 220.

The pressing cover 730 is press-fitted on the fixing plate 720 and fixedly connected with the second back surface 220, specifically, fixedly connected with the second back surface 220 in an adhesive manner, so that the fixing plate 720 is fixedly mounted on the body.

In some embodiments of the present invention, a shield 800 is further included, the shield 800 is disposed on the first back surface 120, and a fourth through hole 810 is disposed on the shield 800.

The protective cover 800 covers the first back surface 120, and covers the template 600 and the press-fitting device mounted on the first back surface 120 therein, so that the protective capability is enhanced, and the reliability of the product is improved. The fourth through hole 810 provided on the shield 800 ensures the stability of the internal and external air pressure. Meanwhile, the air outlet hole can be effectively prevented from being blocked by external dust.

In some embodiments of the present invention, the guide shaft 300 and the second front surface 210 are coupled by a screw coupling structure.

Specifically, the guide shaft 300 passes through the mounting shaft hole 140 to be screwed with the second front surface 210, and the guide shaft 300 and the fixing base 200 are separately molded and assembled together when in use.

In some embodiments of the present invention, a first sealing ring installation groove is formed on the first back surface 120, the first sealing ring installation groove is located between the second front surface 210 and the first back surface 120, and a first sealing ring 910 is installed in the first sealing ring installation groove.

Through installing first sealing washer 910 in first sealing washer mounting groove for in close contact with between fixing base 200 and the first back 120 under the explosion-proof valve normal operating mode, avoid the contact position to have the gap to lead to leaking gas.

In some embodiments of the present invention, the mounting shaft hole 140 is provided at the middle of the exhaust hole 130.

The installation shaft hole 140 is provided at the middle of the exhaust hole 130 to optimize the fit between the holder 200 and the guide shaft 300.

In a further embodiment of the present invention, the first front surface 110 is provided with a second gasket mounting groove disposed around the exhaust hole 130, and the second gasket mounting groove is mounted with a second gasket 920 therein.

When the explosion-proof valve is installed on the box body of the battery pack, the first front surface 110 can be in close contact with the installation position, and the contact surface for placing the installation position leaks air.

In a further embodiment of the present invention, as shown in fig. 4, when the explosion-proof valve of the present invention is installed, the first front surface of the main body 100 is inserted into the installation opening of the tank, and a screw connection portion is provided on the outer wall thereof and locked by the outer hexagonal nut 500, thereby completing the installation with the tank.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example" or "some examples" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the utility model have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the utility model, the scope of which is defined by the claims and their equivalents.

Claims

1. The utility model provides a directional pressure release and dirt-proof explosion-proof valve which characterized in that includes:

2. The explosion-proof valve with directional pressure relief and dust prevention according to claim 1, wherein: the second back is equipped with circular recess, the diaphragm plate sets up in the circular recess to fix through pressure equipment device in the circular recess, the diaphragm plate will circular recess separates for the entrance chamber of lower floor and the export chamber of upper strata, first through-hole with the entrance chamber intercommunication, export chamber and external intercommunication.

3. The explosion-proof valve with directional pressure relief and dust prevention as recited in claim 2, wherein: the press-fitting device comprises a pressing ring, the pressing ring is pressed on the diaphragm plate, and the pressing ring is connected with the inner side surface of the circular groove in an interference fit mode.

4. The directional pressure relief and dust prevention explosion-proof valve according to claim 3, wherein: the press fitting device further comprises a fixing plate, a slotted hole is formed in the outer edge of the fixing seat, the slotted hole is communicated with the outlet cavity, a third vent hole corresponding to the slotted hole is formed in the outer edge of the fixing plate, the fixing plate is pressed on the pressing ring, and the slotted hole is aligned with the third vent hole.

5. The directional pressure relief and dust prevention explosion-proof valve according to claim 4, wherein: the press-fitting device further comprises a press cover, and the press cover is press-fitted on the fixing plate and fixedly connected with the second back face.

6. The directional pressure relief and dust prevention explosion-proof valve according to any one of claims 1 to 5, characterized in that: still include the protection casing, the protection casing cover is established on the first back, be equipped with the fourth through-hole on the protection casing.

7. The explosion-proof valve with directional pressure relief and dust prevention according to claim 1, wherein: the guide shaft is connected with the second front face through a threaded connection structure.

8. The explosion-proof valve with directional pressure relief and dust prevention according to claim 1, wherein: the first sealing ring mounting groove is formed in the first back face and located between the second front face and the first back face, and a first sealing ring is mounted in the first sealing ring mounting groove.

9. The explosion-proof valve with directional pressure relief and dust prevention according to claim 1, wherein: the installation shaft hole is arranged in the middle of the exhaust hole.

10. The explosion-proof valve with directional pressure relief and dust prevention as recited in claim 9, wherein: the first front is equipped with second sealing washer mounting groove, second sealing washer mounting groove winds exhaust hole sets up, install the second sealing washer in the second sealing washer mounting groove.