CN215379421U

CN215379421U - Explosion-proof device

Info

Publication number: CN215379421U
Application number: CN202121096515.8U
Authority: CN
Inventors: 李振亚; 施成攀; 王圣明; 张凯暾
Original assignee: Hefei Hengjun Testing Technology Co ltd
Current assignee: Hengjun Testing Technology Co ltd
Priority date: 2021-05-19
Filing date: 2021-05-19
Publication date: 2021-12-31
Anticipated expiration: 2031-05-19

Abstract

The utility model discloses an explosion-proof device, which comprises a box body and an energy-absorbing fastening device, wherein the box body comprises a box body and a box cover for plugging an opening of the box body; the energy-absorbing fastening device is used for locking the cover plate and the first flanging, and when the explosion-proof device explodes, the energy-absorbing fastening device absorbs energy and deforms, and a first pressure relief opening is formed between the first flanging and the cover plate. In the explosion-proof device that this application provided, through when explosion takes place inside the explosion-proof device, the energy-absorbing fastener energy-absorbing warp, forms first pressure release mouth between first turn-ups and the apron simultaneously, and then realizes realizing the inside pressure release of box at the energy-absorbing in-process, and then has improved the safety in utilization of box.

Description

Explosion-proof device

Technical Field

The utility model relates to the technical field of explosion-proof safety devices, in particular to an explosion-proof device.

Background

In equipment such as a photovoltaic inverter, a wind power converter, an energy storage device, a battery system and the like, when internal power semiconductor devices of the equipment are invalid, energy storage components are damaged or abnormal combustible gas is generated due to various faults, violent physical or chemical explosions can occur. Especially, when the electrolyte, carbon monoxide or hydrogen and other combustible gases are released by the internal capacitance device of the converter due to sudden overvoltage, overtemperature or short circuit, the explosion power is huge, and serious casualties can be caused.

When the box body is violently imploded, if the deformation capability of the box cover is weaker, the deformation is slowed down or the physical strength of the fixed part of the box cover and the box body is insufficient, the box cover can fly out quickly, and the use safety of the explosion-proof equipment is low.

Therefore, how to improve the use safety of the box body is a technical problem to be solved urgently by the technical personnel in the field.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an explosion-proof device to improve the use safety of a box body.

To achieve the above object, the present invention provides an explosion-proof device, comprising:

the box body comprises a box body and a box cover for plugging an opening of the box body, a first flanging which is matched with the box cover is arranged at the upper part of the opening position of the box body, the box cover comprises a cover plate, the cover plate is opposite to the opening of the box body, and the first flanging is positioned between the cover plate and the opening position;

and the energy-absorbing fastening device is used for locking the cover plate and the first flanging, when the explosion-proof device explodes, the energy-absorbing fastening device absorbs energy and deforms, and a first pressure relief opening is formed between the first flanging and the cover plate.

Preferably, the energy-absorbing fastening device comprises a locking cap, a first threaded part and a second threaded part in threaded connection with the first threaded part, the locking cap is fixedly connected with the first threaded part, the locking cap is abutted to the outer surface of the box cover, and the second threaded part is located on the first flanging and on one side of the cover plate, which is arranged in the reverse direction.

Preferably, the second screw member is a clinch nut threadedly engaged with the first screw member.

Preferably, the box cover further comprises a plurality of flanges located at the edge of the cover plate, a second flange and a third flange connected to the second flange and far away from one end of the cover plate, and the first flange is located between the cover plate and the third flange.

Preferably, after the explosion of the explosion-proof device, the third flanging is abutted and limited with the first flanging, and the third flanging is provided with a second through hole for the second screw part and the first screw part to pass through.

Preferably, at least two of the energy-absorbing fastening means share one of the third cuffs; or the third flanging corresponds to the energy-absorbing fastening devices one by one.

Preferably, the second flanging is provided with a U-shaped structure for supplying the pressure to the first pressure relief opening, the third flanging is multiple, two adjacent third flanging form the second pressure relief opening, and the length of the second pressure relief opening is gradually reduced along the length in the opening direction towards the opening direction close to the U-shaped structure.

Preferably, the energy-absorbing fastening devices are distributed circumferentially around the first flange.

Preferably, the box body comprises a side wall, a fourth flange and a fifth flange, the fourth flange is provided with an opening, the fifth flange is connected with the fourth flange and the first flange, the fourth flange and the fifth flange form a U-shaped structure with an outward opening.

Preferably, the side wall and the fifth flange are arranged in parallel, and the first flange and the fourth flange are arranged in parallel.

Preferably, the fourth flange is opposite to the bottom wall of the box body, and the fourth flange, the fifth flange and the first flange are all of annular plate structures.

Preferably, the box body and/or the box cover and/or the energy-absorbing fastening device are metal pieces.

In the technical scheme, the explosion-proof device provided by the utility model comprises a box body and an energy-absorbing fastening device, wherein the box body comprises a box body and a box cover for plugging an opening of the box body; the energy-absorbing fastening device is used for locking the cover plate and the first flanging, and when the explosion-proof device explodes, the energy-absorbing fastening device absorbs energy and deforms, and a first pressure relief opening is formed between the first flanging and the cover plate.

According to the anti-explosion device, when the anti-explosion device explodes, the energy-absorbing fastening device absorbs energy and deforms, the first pressure relief opening is formed between the first flanging and the cover plate, the internal pressure relief of the box body is achieved in the energy-absorbing process, and the use safety of the box body is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an explosion-proof device according to an embodiment of the present invention;

FIG. 2 is a schematic view of the explosion-proof device shown in FIG. 1 in a locked state in a direction A;

FIG. 3 is an enlarged view of a portion of the explosion proof device of FIG. 2;

FIG. 4 is a schematic diagram of the explosion-proof device of FIG. 1 after explosion;

FIG. 5 is an enlarged view of a portion of the explosion vent of FIG. 4;

fig. 6 is a schematic structural diagram of a case cover according to an embodiment of the present invention;

FIG. 7 is a view of the cover of FIG. 6 in the direction B;

fig. 8 is a schematic structural diagram of another explosion-proof device according to an embodiment of the present invention.

Wherein in FIGS. 1-8:

1. a box body;

1-1, side wall; 1-2, a fourth flanging; 1-3, fifth flanging; 1-4, first flanging;

2. a box cover;

2-1, a cover plate; 2-2, second flanging; 2-3, third flanging;

3. an energy-absorbing fastening device;

3-1, locking cap; 3-2, a first threaded member; 3-3, a second screw.

Detailed Description

The core of the utility model is to provide an explosion-proof device to improve the use safety of the box body.

In order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings and embodiments.

Please refer to fig. 1 to 8.

In a specific embodiment, the explosion-proof device provided by the specific embodiment of the utility model comprises a box body and an energy-absorbing fastening device 3, wherein the box body comprises a box body 1 and a box cover 2 for blocking an opening of the box body 1. The material of the box body 1 and the box cover 2 can be the same or different, wherein the material of the box body 1 and the box cover 2 is preferably harder. Specifically, the box body 1 and/or the box cover 2 and/or the energy-absorbing fastening device 3 are metal pieces.

Specifically, the number and the size of the energy-absorbing fastening devices 3 are determined according to actual needs, and the explosion-proof requirements can be met. Preferably, each side of the box cover 2 is provided with an energy-absorbing fastening device 3. Preferably, the energy-absorbing fastening devices 3 are circumferentially distributed around the opening of the box body 1, and specifically, the distance between two adjacent energy-absorbing fastening devices 3 may be equal or different.

Specifically, the box cover 2 can be a hard material thin-wall shell made of aluminum alloy, carbon steel, stainless steel and the like, and can be rectangular, square, polygonal and the like according to the structure of the box body.

The box body 1 is made of hard materials such as aluminum alloy, carbon steel, stainless steel and the like, and the box cover 2 is preferably basically consistent in shape. Specifically, when the cover 2 is fastened, it is preferable that the outer periphery of the cover be coplanar with the side wall 1-1 of the case body 1.

The energy-absorbing fastening device 3 may be a hard material such as aluminum alloy, carbon steel, stainless steel, or the like.

The upper part of the opening position of the box body 1 is provided with first flanges 1-4 which are matched with the box cover 2. The box cover 2 comprises a cover plate 2-1, the cover plate 2-1 is opposite to the opening of the box body 1, and the first flanging 1-4 is positioned between the cover plate 2-1 and the opening; the energy-absorbing fastening device 3 is used for locking the cover plate 2-1 and the first flanging 1-4, when the explosion-proof device explodes, the energy-absorbing fastening device 3 absorbs energy and deforms, and a first pressure relief opening is formed between the first flanging 1-4 and the cover plate 2-1.

Specifically, the first flange 1-4 may be a flange of the box body 1 facing the opening, that is, the first flange 1-4 is located on the outer side of the sidewall 1-1 of the box body 1. Specifically, the first flanging 1-4 is arranged in parallel with the bottom wall of the box body 1.

In a specific embodiment, the box cover 2 further comprises a plurality of flanges located at the edge of the cover plate 2-1, a second flange 2-2 and a third flange 2-3 connected to the second flange 2-2 at the end away from the cover plate 2-1, and the first flange 1-4 is located between the cover plate 2-1 and the third flange 2-3. When explosion occurs in the explosion-proof device, the third flanging 2-3 is finally abutted to the cover plate 2-1, so that the separation of the box cover 2 and the box body 1 is avoided, and the use safety is improved.

As can be seen from the above description, in the explosion-proof device provided in the embodiment of the present application, when the inside of the explosion-proof device explodes, the energy-absorbing fastening device 3 absorbs energy and deforms, and the first pressure relief opening is formed between the first flange 1-4 and the cover plate 2-1, so that during the energy-absorbing process, the inside of the box body is relieved, and finally the first flange 1-4 abuts against the third flange 2-3, so that the use safety of the box body is improved.

On the other hand, the explosion-proof device that this application provided only needs to adapt to the improvement to the structure of traditional box body 1 and case lid 2, and whole change is less, and the processing of case lid 2 is convenient, and is with low costs, possesses fine economic benefits.

Wherein, the case cover 2 can be formed by sheet metal stamping or metal powder die casting so as to reduce the cost.

The shape of the box body and the size of the energy-absorbing fastening device 3 at the corresponding position can be adjusted as required, and the explosion-proof requirement is met.

The dimensions of the wall thicknesses of the box body 1 and the box cover 2 are determined according to actual needs, and the application is not particularly limited. The box body 1 can be rectangular, square, polygonal, cylindrical and the like, and the box cover 2 can also be rectangular, trapezoidal, polygonal, circular and the like.

In a specific embodiment, the energy-absorbing fastening device comprises a locking cap 3-1, a first threaded part 3-2 and a second threaded part 3-3 in threaded connection with the first threaded part 3-2, the locking cap 3-1 is fixedly connected with the first threaded part 3-2, the locking cap 3-1 is abutted against the outer surface of the box cover 2, and the second threaded part 3-3 is positioned on one side of the first flanging 1-4, which is arranged opposite to the cover plate 2-1. Specifically, one of the first screw member 3-2 and the second screw member 3-3 is a screw, and the other is a cylindrical structure having an internal thread. Specifically, the locking cap 3-1 and the first screw member 3-2 may constitute a screw or a bolt, or the like.

During specific assembly, the first threaded part 3-2 penetrates through the cover plate 2-1 and the first flanging 1-4 to fixedly connect the box body 1 and the box cover 2.

Case lid

2 and 1 zonulae occludens of box body in this application, and energy-absorbing fastener is located 2 surfaces of case lid, and the box is when being in locking state, does not influence the box normal use.

Specifically, in order to improve the sealing performance of the box body, the second screw member 3-3 is preferably a press-riveting nut which is in threaded fit with the first screw member 3-2.

When explosion happens in the explosion-proof device, the threaded connection part of the first threaded part 3-2 and the second threaded part 3-3 deforms, and the first threaded part 3-2 moves towards the direction far away from the box body 1 relative to the second threaded part 3-3.

In a specific embodiment, after the explosion-proof device explodes, the third flanging 2-3 is abutted with the first flanging 1-4 for limiting, and the third flanging 2-3 is provided with a second through hole for the second threaded part 3-3 and the first threaded part 3-2 to pass through.

When the interior of the box body explodes, the position of the box body is assumed to be unchanged, and the position of the box cover 2 and the energy-absorbing fastening device 3 are displaced. The third flanging 2-3 of the box cover 2 is contacted with the first flanging 1-4 of the box body 1, and a pressure relief channel is formed between the box cover 2 and the box body 1. Because the first turned-over edges 1-4 and the third turned-over edges 2-3 are abutted and limited, kinetic energy generated by the box cover 2 after explosion can be effectively resisted, the box cover 2 is prevented from flying out, the explosion-proof function is finally realized, and the final effect is shown in fig. 4 and fig. 5.

Preferably, the energy-absorbing fastening devices 3 are multiple, and the energy-absorbing fastening devices 3 are circumferentially distributed around the first flanges 1-4. When the opening of the box body 1 is polygonal, preferably, each side of the opening of the box body 1 is provided with an energy-absorbing fastening device 3.

As shown in figures 3 and 5, the box body 1 comprises a side wall 1-1, a fourth flanging 1-2 arranged at an opening position, and a fifth flanging 1-3 connected with the fourth flanging 1-2 and the first flanging 1-4, wherein the first flanging 1-4, the fourth flanging 1-2 and the fifth flanging 1-3 form a U-shaped structure with an outward opening. As set forth above, the second flange 2-2 of the cover 2 can be made flush with the side wall 1-1. The edge of the box body is prevented from protruding outwards.

Specifically, the side wall 1-1 and the fifth flanging 1-3 are arranged in parallel, and the first flanging 1-4 and the fourth flanging 1-2 are arranged in parallel. The arrangement is convenient for processing and assembling the box body.

The fourth flanging 1-2 is opposite to the bottom wall of the box body 1, the fourth flanging 1-2, the fifth flanging 1-3 and the first flanging 1-4 are all of annular plate structures, the sealing performance of the box body in a locking state is improved, and in order to improve the sealing performance, the first flanging 1-4 and the third flanging 2-3 are abutted to form a sealing ring.

When the energy-absorbing fastening device is used specifically, at least two energy-absorbing fastening devices 3 share one third flanging 2-3; or the third flanging 2-3 is in one-to-one correspondence with the energy-absorbing fastening devices 3.

The second flanges 2-2 are provided with U-shaped structures for the first pressure relief openings to relieve pressure, and as shown in fig. 7, a plurality of third flanges 2-3 are provided. Specifically, two adjacent third flanges 2-3 form a second pressure relief opening, and the length of the second pressure relief opening is gradually reduced towards the opening direction close to the U-shaped structure along the length of the opening direction, so that the pressure relief is accelerated. During assembly, a drawing mode can be adopted, the assembly of the box body 1 and the box cover 2 is realized, and the box body and the box cover are locked through the energy-absorbing fastening device 3 after being matched in place. Of course, the second pressure relief opening can be the same in size and the third flanges 2-3 can be the same or different in structure during specific machining.

As shown in FIG. 6, when a plurality of third flanges 2-3 are provided, the flange length L2 is greater than or equal to L1, the opening size M1 of the second pressure relief opening between two adjacent third flanges 2-3 is greater than or equal to M2 and greater than or equal to 0, the flange width c is greater than 0, and the specific size is determined according to the actual situation. Meanwhile, the corresponding position of the box body 1 can be consistent with the opening size of the corresponding position of the box cover 2, and the opening is not needed. The third flanging 2-3 can be rectangular, circular arc, zigzag and the like.

In order to reduce the labor intensity of workers for assembling the box body, preferably, the box body 1 and/or the box cover 2 are of an integrally formed structure.

In one embodiment, the box body 1 is a square box, and the length a is 150mm to 250mm, and specifically, the side length of the box body 1 may be 200 mm. As shown in fig. 6, the length L1 of the third cuff 2-3 adjacent to the opening of the U-shaped structure may be 35mm to 45mm, and may be 40mm, and the length L2 of the second third cuff 2-3 adjacent to the opening of the U-shaped structure may be 60mm to 70mm, and may be 65 mm. The distance M1 between two adjacent third flanges 2-3 can be 18mm, M2 can be 25mm, the widths of the folded positions of the third flanges 2-3 can be the same, and the width of the third flanges 2-3 can be 20mm-24mm, specifically 22 mm. When the box body explodes, the box cover 2 and the fastening device displace to absorb energy, a first pressure relief opening is formed between the box cover 2 and the box body, meanwhile, the box cover 2 is in hard contact with the box body, and the explosion energy is absorbed by the strength of the first flanging 1-4 and the third flanging 2-3.

The application provides an explosion-proof equipment is specifically adding man-hour, can rationally select the combination and the optimization scheme of 2 shapes of case lid according to the explosion situation and the explosion energy level in the actual case, realizes explosion-proof purpose, and the whole practicality of system is very strong.

The explosion-proof device of this application can be directed against the inside box design that has high voltage, high current, and its case lid 2 and box body 1 need guarantee the less separation distance of shell and box after the explosion under the condition that satisfies its protection requirement of violent explosion.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An explosion protection device, comprising:

the box body comprises a box body (1) and a box cover (2) for plugging an opening of the box body (1), a first flanging (1-4) matched with the box cover (2) is arranged at the upper part of the opening of the box body (1), the box cover (2) comprises a cover plate (2-1), the cover plate (2-1) is opposite to the opening of the box body (1), and the first flanging (1-4) is positioned between the cover plate (2-1) and the opening;

and the energy-absorbing fastening device (3) is used for locking the cover plate (2-1) and the first flanging (1-4), when the explosion-proof device explodes, the energy-absorbing fastening device (3) absorbs energy and deforms, and a first pressure relief opening is formed between the first flanging (1-4) and the cover plate (2-1).

2. An explosion-proof device according to claim 1, characterized in that the energy-absorbing fastening device comprises a locking cap (3-1), a first screw (3-2) and a second screw (3-3) in threaded connection with the first screw (3-2), the locking cap (3-1) is fixedly connected with the first screw (3-2), the locking cap (3-1) abuts against the outer surface of the box cover (2), and the second screw (3-3) is located on the first flanging (1-4) on the side opposite to the cover plate (2-1).

3. Explosion protection device according to claim 2, wherein the second threaded element (3-3) is a clinch nut which is in threaded engagement with the first threaded element (3-2).

4. The explosion-proof device according to claim 2, characterized in that the box cover (2) further comprises a plurality of flanges at the edge of the cover plate (2-1), a second flange (2-2) and a third flange (2-3) connected to the second flange (2-2) at the end away from the cover plate (2-1), and the first flange (1-4) is located between the cover plate (2-1) and the third flange (2-3).

5. The explosion-proof device according to claim 4, characterized in that after the explosion inside the explosion-proof device, the third flanging (2-3) is abutted with the first flanging (1-4) for limiting, and a second through hole for the second screw (3-3) and the first screw (3-2) to pass through is arranged on the third flanging (2-3).

6. Explosion protection device according to claim 4, wherein at least two energy-absorbing fastening means (3) share one of the third flanges (2-3); or the third flanging (2-3) corresponds to the energy-absorbing fastening devices (3) one by one.

7. The explosion-proof device according to claim 4, characterized in that the second flanging (2-2) is provided with a U-shaped structure for releasing the pressure of the first pressure relief opening, the third flanging (2-3) is provided with a plurality of third flanging, two adjacent third flanging (2-3) form a second pressure relief opening, and the length of the second pressure relief opening is gradually reduced along the length of the opening direction towards the opening direction close to the U-shaped structure.

8. Explosion protection device according to claim 1, wherein the energy-absorbing fastening means (3) are a plurality of fastening means, the energy-absorbing fastening means (3) being distributed circumferentially around the first flange (1-4).

9. The explosion-proof device according to claim 1, characterized in that the box body (1) comprises a side wall (1-1), a fourth flange (1-2) provided with an opening position, and a fifth flange (1-3) connecting the fourth flange (1-2) and the first flange (1-4), the fourth flange (1-2) and the fifth flange (1-3) form a U-shaped structure with an outward opening.

10. Explosion protection device according to claim 9, characterized in that the side wall (1-1) and the fifth flange (1-3) are arranged in parallel, and the first flange (1-4) and the fourth flange (1-2) are arranged in parallel.

11. The explosion-proof device according to claim 9, characterized in that the fourth flange (1-2) is opposite to the bottom wall of the box body (1), and the fourth flange (1-2), the fifth flange (1-3) and the first flange (1-4) are all in an annular plate structure.

12. Explosion protection device according to any one of claims 1 to 11, characterized in that the tank body (1) and/or the tank cover (2) and/or the energy-absorbing fastening means (3) are metal pieces.