CN216217878U - Explosion-proof device - Google Patents

Abstract

The utility model discloses an explosion-proof device which comprises a box body and a fastening piece. The box body comprises a box body and a box cover for plugging an opening of the box body. The fastener is used for locking box body and case lid, and the case lid is equipped with the energy-absorbing board of bending that deforms after the explosion in the circumference of installation fastener. In the explosion-proof equipment that this application provided, owing to be equipped with the energy-absorbing board of bending of deformation after the explosion through the circumference at the fastener, when the box implosion, through the energy-absorbing board deformation energy-absorbing of bending, and then reduce the box and press, 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;

and the fastening piece is used for locking the cover plates of the box body and the box cover, and the cover plate is provided with an energy-absorbing bent plate which deforms after explosion in the circumferential direction of the fastening piece.

Preferably, the energy-absorbing bent plate is a bent plate which is circumferentially and annularly arranged by taking the fastener as a center.

Preferably, the energy-absorbing bent plate is a corrugated plate.

Preferably, when the explosion-proof device is in a locked state, the outer surface of the energy-absorbing bent plate forms a groove body which is concave towards the inner cavity of the box body.

Preferably, the edge of the cover plate of the box cover is provided with a first flanging which is opposite to the side wall of the box body.

Preferably, the lateral wall of box body is equipped with the second turn-ups with box body diapire subtend setting, the fastener with second turn-ups fixed connection.

Preferably, the second flanging is annularly arranged around the side wall of the box body.

Preferably, one end, far away from the box body, of the second flanging is provided with a third flanging, the free end of the third flanging faces the cover plate, and the fastening piece is located in a cavity formed between the first flanging and the third flanging.

Preferably, a sealing ring is arranged at the joint of the third flanging and the cover plate.

Preferably, the fastener includes the locking cap and with the first screw thread spare that the locking cap is fixed, be equipped with on the box body with the second screw thread spare of first screw thread spare threaded connection.

Preferably, the energy-absorbing bending plate further comprises a limiting cylinder sleeved on the outer side of the first threaded part, one end of the limiting cylinder is connected with the end face of the locking cap, and the other end of the limiting cylinder is connected with the outer surface of the energy-absorbing bending plate.

Preferably, the second threaded piece is located on the outer surface of the box body, and the end part supports the energy-absorbing bent plate.

Preferably, the fastening pieces and the energy-absorbing bent plates are multiple, and the thicknesses of the energy-absorbing bent plates are the same or different.

Preferably:

the box body and/or the box cover and/or the fastener are metal pieces.

Preferably, the distance between two adjacent fasteners is equal or unequal.

In the technical scheme, the explosion-proof device provided by the utility model comprises a box body and a fastener. The box body comprises a box body and a box cover for plugging an opening of the box body. The fastener is used for locking box body and case lid, and the case lid is equipped with the energy-absorbing board of bending that deforms after the explosion in the circumference of installation fastener.

According to the anti-explosion device, the energy-absorbing bending plate which deforms after explosion is arranged in the circumferential direction of the fastening piece, so that the energy is absorbed through the deformation of the energy-absorbing bending plate when the box body is implosively arranged, the internal pressure of the box body is reduced, 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 a portion of the explosion proof device shown in FIG. 1 in a locked state;

FIG. 3 is a schematic view of a portion of the explosion-proof device of FIG. 1 in a post-explosion state;

fig. 4 is a schematic structural diagram of a case cover according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of another explosion-proof device provided by the embodiment of the utility model;

FIG. 6 is a view showing the mounting position of the lid and the gasket shown in FIG. 5;

fig. 7 is a partial structural schematic view of the explosion-proof device shown in fig. 5 in a locked state.

Wherein in FIGS. 1-7:

1. a box body;

1-1, side wall; 1-2, second flanging; 1-3, third flanging;

2. a box cover;

2-1, a cover plate; 2-2, energy-absorbing bent plates; 2-3, first flanging; 2-4, fastener mounting holes;

3. a fastener; 4. a seal ring; 5. a second threaded member; 6. a limiting cylinder.

Detailed Description

The utility model provides an explosion-proof device, and aims to improve the use safety of a 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 7.

In one embodiment, the explosion-proof device provided by the embodiment of the utility model comprises a box body and a fastening piece 3. The box includes box body 1 and shutoff box lid 2 of 1 open-ended of box body. The fastening piece 3 is used for locking the box body 1 and the box cover 2, and the box cover 2 is provided with an energy-absorbing bent plate 2-2 which deforms after explosion in the circumferential direction of the fastening piece 3. Specifically, the thicknesses of the energy-absorbing bent plates 2-2 can be the same or different, and preferably, the energy-absorbing bent plates 2-2 are corrugated plates. In particular, the corrugations may be arranged in a ring shape, with the fastener 3 being located in the center of the ring-shaped corrugations. Preferably, when the explosion-proof device is not exploded, the energy-absorbing bent plate 2-2 is provided with a first groove with the outer wall sunken towards the interior of the box body 1, and the energy-absorbing bent plate 2-2 is provided with a second groove with the inner wall sunken towards the exterior of the box body 1-1.

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 is preferably harder. Specifically, the case body 1 and/or the case cover 2 may be made of metal. Specifically, the box body 1 is made of metal such as aluminum alloy, carbon steel or stainless steel; the box cover 2 can be a thin-wall shell formed by processing metals such as aluminum alloy, carbon steel or stainless steel.

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.

Specifically, the number of the fasteners 3 is determined according to actual needs, and the explosion-proof requirements can be met. Preferably, each side of the cover 2 is provided with a fastener 3. As shown in FIG. 4, the distance between the fastener mounting holes 2-4 at the mounting positions of different fasteners 3 of the same box cover 2 can be the same or different, and the size and thickness of each fastener 3 corresponding to the energy-absorbing bent plate 2-2 can be the same or different. As shown in fig. 6, the bottom ends of the three energy-absorbing bent plates 2-2 are respectively D1, D2 and D3, the three energy-absorbing bent plates 2-2 with different sizes meet different energy-absorbing effects, specifically, the box cover 2 deforms to absorb explosive energy, the energy-absorbing bent plates 2-2 at the folding angle positions of the cover plate 2-1 can also have the same structure, the energy-absorbing bent plates 2-2 at the side surfaces of the cover plate 2-1 have the same structure, for example, the sizes of D1 and D3 are the same, and the size of D2 is larger than that of D1.

In order to realize different energy absorption effects, the energy absorption bending plate comprises at least two energy absorption bending plates 2-2 with different energy absorption effects.

The locking member may be embodied as a snap or screw locking member. The locking piece can be made of hard materials such as aluminum alloy, carbon steel, stainless steel and the like.

In order to reduce the labor intensity of workers for assembling the box body 1 and/or the box cover 2, it is preferable. The box body 1 and/or the box cover 2 are of an integrally formed structure. Specifically, the case body 1 and/or the case cover 2 may be formed by die casting or casting.

As can be seen from the above description, in the explosion-proof device provided in the embodiment of the present application, since the energy-absorbing bent plate 2-2 that deforms after explosion is disposed in the circumferential direction of the fastening member 3, when the box body implodes, the energy is absorbed by the deformation of the energy-absorbing bent plate 2-2, so as to reduce the internal pressure of the box body, and improve the safety of the box body in use.

On the other hand, because the explosion-proof equipment overall structure spare that this application provided is few, and box body 1 and case lid 2 can adopt panel beating punching press or metal powder die-casting to form, and is with low costs.

Specifically, in order to approximate the energy-absorbing deformation around the fastener 3, preferably, the energy-absorbing bent plate 2-2 is a bent plate circumferentially and annularly arranged with the fastener 3 as a center. In particular, the bent plate may be arranged in a circular corrugation.

In order to improve the deformation capacity of the energy-absorbing bent plate 2-2, preferably, when the explosion-proof device is in a locked state, the outer surface of the energy-absorbing bent plate 2-2 forms a groove body which is concave towards the inner cavity of the box body 1. Specifically, the outer surface of the energy-absorbing bent plate 2-2 forms a groove body which is concave towards the inner cavity of the box body 1, namely the energy-absorbing bent plate 2-2 is concave towards the cover plate 2-1 in a normal locking state, and after explosion, the energy-absorbing bent plate 2-2 protrudes outwards to absorb energy with the deformation of the cover plate 2-1.

Preferably, the groove is annularly arranged with the fastener 3 as the center. Specifically, the number of the groove bodies can be one or at least two, and the adjacent groove bodies are sequentially sleeved with each other. Because the groove body is annularly arranged by taking the fastener 3 as a center, when the energy-absorbing bending plate is deformed, the annular deformation area of the energy-absorbing bending plate 2-2 is uniform, and the condition that the energy-absorbing bending plate 2-2 is locally damaged by large stress is further reduced.

As shown in FIG. 2, in order to improve the sealing performance of the box body, preferably, the edge of the cover plate 2-1 of the box cover 2 is provided with a first flange 2-3 opposite to the side wall 1-1 of the box body 1. Specifically, the first flanging 2-3 is annularly arranged. As shown in fig. 2, the first flange 2-3 is overlapped with the box body 1 in a top-down projection. Preferably, the first flange 2-3 is integrally formed with the cover plate 2-1.

As shown in FIG. 2, further, the side wall 1-1 of the box body 1 is provided with a second flange 1-2 opposite to the bottom wall of the box body 1, and the fastening member 3 is fixedly connected with the second flange 1-2. Through setting up second turn-ups 1-2, be convenient for fastener 3 and box body 1 are connected.

In order to reduce the deformation of the second flanging 1-2 during explosion, the second flanging 1-2 is annularly arranged around the side wall 1-1 of the box body 1. Specifically, the second flanging 1-2 is arranged at the opening end of the box body 1 and is positioned at the side part of the side wall 1-1.

In a specific embodiment, one end of the second flanging 1-2 far away from the box body 1 is provided with a third flanging 1-3 with a free end facing the cover plate 2-1, and the fastening piece 3 is positioned in a cavity formed between the first flanging 2-3 and the third flanging 1-3.

Preferably, the third flanging 1-3 is arranged in parallel with the side wall 1-1 of the box body 1. The second flanging 1-2 is arranged in parallel with the bottom wall of the box body 1. When locked, the cover plate 2-1 is preferably attached to the free end of the third flange 1-3.

In order to improve the sealing performance, a sealing ring 4 is preferably arranged at the joint of the third flanging 1-3 and the cover plate 2-1. Specifically, all the fastening members 3 are located on the outer periphery of the seal ring 4. When explosion-proof equipment was in locking state, guaranteed box internal seal nature, consequently, the explosion-proof equipment that this application provided does not influence the protective capacities of box.

In order to further improve the sealing performance, the free end of the first flanging 2-3 is preferably arranged to be separated from the box body 1.

The fastener 3 includes the locking cap and with the fixed first screw thread spare of locking cap, be equipped with on the box body 1 with first screw thread spare threaded connection's second screw thread spare 5. Specifically, one of the first screw member and the second screw member 5 is a screw, and the other is a cylindrical structure having an internal thread.

Specifically, the locking member may be a bolt, a screw, or the like. When the box cover is installed, the first threaded part penetrates through the cover plate 2-1 and is fastened with the second threaded part 5 on the box body 1, and then the box cover 2 is locked with the box body 1.

The second screw thread piece 5 is positioned on the outer surface of the box body 1, and the end part supports the energy-absorbing bent plate 2-2. Specifically, the second threaded part 5 is located on the outer side of the second flanging 1-2, and the second threaded part 5 is arranged on the outer surface of the box body 1, so that the energy-absorbing bending plate 2-2 is supported in a limiting mode, and a space is reserved for installing the energy-absorbing bending plate 2-2.

In a specific embodiment, as shown in fig. 7, the explosion-proof device further comprises a limiting cylinder 6 sleeved outside the first threaded member, one end of the limiting cylinder 6 is connected with the end face of the locking cap, and the other end is connected with the outer surface of the energy-absorbing bent plate 2-2.

Specifically, the limiting cylinder 6 can be made of a brittle material, and when the energy-absorbing bent plate 2-2 absorbs energy and deforms, the limiting cylinder 6 is firstly contacted, and the energy-absorbing bent plate 2-2 continues to deform after the limiting cylinder 6 is broken under stress. Or the limiting cylinder 6 is made of energy-absorbing deformable material, and when the energy-absorbing bending plate 2-2 receives acting force, the energy-absorbing bending plate 2-2 extrudes the limiting cylinder 6 to deform for absorbing energy.

The limiting cylinder 6 can be a tubular structure made of aluminum alloy, steel, PC and the like and having certain strength, and the shape of the limiting cylinder can be a cone, a gourd-shaped, an oval, a cylinder or a polygon and the like.

Specifically, the distance from the top end of the cover plate 2-1 to the bottom end of the energy-absorbing bending plate 2-2 is greater than the length of the limiting cylinder 6, and the length of the limiting cylinder 6 is greater than the length of the bottom of the specific groove body at the top end of the energy-absorbing bending plate 2-2 where the fastener 3 is installed. As shown in fig. 7, the specific length L1 of the top end of the cover plate 2-1 from the bottom end of the energy-absorbing bent plate 2-2 may be 15mm, the length L2 of the limiting cylinder 6 may be 12mm, and the length L3 of the bottom of the specific groove at the top end of the energy-absorbing bent plate 2-2 where the fastener 3 is installed may be 10 mm. Of course, the lengths of L1, L2, and L3 are merely examples, and the above dimensions are not limited in specific use.

When explosion happens in the box body, in order to prevent the installation position of the fastening piece 3 of the box cover 2 from being torn, the increased limiting cylinder 6 increases the contact area, can effectively prevent the cover plate 2-1 from being torn, further enables the box cover 2 to be effectively deformed, and absorbs the mechanical energy converted by the explosion.

In order to avoid damage to the fastening member 3 by foreign objects, it is preferable that the fastening member 3 be recessed in the outer end surface of the case cover 2 when the explosion-proof device is in the locked state.

Specifically, the number of the fasteners 3 and the number of the energy-absorbing bent plates 2-2 are multiple, and preferably, the fasteners 3 correspond to the energy-absorbing bent plates 2-2 one by one.

After the explosion happens inside the box body of the explosion-proof device, the energy-absorbing bent plate 2-2 at the position of the over-fastening piece 3 of the box cover 2 deforms on the assumption that the position of the box body is unchanged. The energy generated by explosion is absorbed in the deformation process of the box cover 2, and a pressure relief channel is formed between the box cover 2 and the box body 1 along with the deformation of the energy-absorbing bent plate 2-2. Along with the reduction of case lid 2 kinetic energy, the existence of retaining member has prevented the departure of case lid 2, has finally realized explosion-proof function. The structure diagram of the explosion-proof device after explosion is shown in fig. 3, specifically, each drawing angle of the fastening piece 3 on the box cover 2 is more than or equal to 0.

In the specific processing, as shown in fig. 2, the length L1 of the box cover 2 may be 10mm to 20 mm. In particular, L1 may be 15 mm. The distance L2 between the end face of the energy-absorbing bent plate 2-2 provided with the fastener 3 and the bottom end of the energy-absorbing bent plate 2-2 can be 8mm-12mm, the specific L2 can be 10mm, the included angle between one inclined plane of the groove body of the energy-absorbing bent plate 2-2 and the horizontal plane and the angle between the other inclined plane of the groove body of the energy-absorbing bent plate 2-2 and the horizontal plane are acute angles, the specific angle alpha is 30 degrees, and the angle beta is 30 degrees. When the box body explodes, the energy-absorbing bent plate 2-2 of the box cover 2 protrudes outwards to deform, so that energy is absorbed, and the kinetic energy of the box cover 2 is reduced.

As shown in FIG. 5, the box body may be rectangular, the width a of the cover plate 2-1 may be 1800mm-2200mm, specifically 200mm, and the length b of the cover plate 2-1 may be 280mm-320mm, specifically 300 mm.

As shown in fig. 4, the box body is square, and the box cover 2 is a square cover body, wherein the side length of the cover plate 2-1 may be 250mm-350mm, and specifically may be 300 mm. Fig. 6 shows a cross-sectional view of the lid 2 at the location 4 indicated in fig. 5, in which: the length D1-D3-25 mm and the length D2-30 mm. When the box body explodes, the energy-absorbing bent plates 2-2 at different positions of the box cover 2 are subjected to different forces, so that different sizes meet different energy-absorbing effects, and the box cover 2 deforms to absorb explosion energy. Therefore, the combination and optimization scheme of the position and the shape of the fastening device of the box cover 2 can be reasonably selected according to the explosion condition and the explosion energy level in the actual box body, the explosion-proof purpose is realized, and the overall practicability of the system is very strong.

The application provides an explosion-proof equipment only needs to change the shape of traditional case lid 2, and other structures can be the same for traditional structure, and case lid 2 processing is convenient, and is with low costs, possesses fine economic benefits.

The explosion-proof device can be a box body with high voltage and high current inside, and the box cover 2 and the box body 1 of the explosion-proof device need to ensure a smaller separation distance between the box cover 2 and the box body 1 after explosion under the condition of meeting the protection requirement of severe explosion of the explosion-proof device, so that the influence on the environment is reduced, and the overall safety of the box body is improved.

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 (15)

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);

and the fastening piece (3) is used for locking the cover plate (2-1) of the box body (1) and the box cover (2), and the cover plate (2-1) is provided with an energy-absorbing bent plate (2-2) which deforms after explosion in the circumferential direction for mounting the fastening piece (3).

2. Explosion protection device according to claim 1, characterized in that the energy-absorbing bent plates (2-2) are bent plates arranged circumferentially in a ring shape with the fastener (3) as the center.

3. Explosion protection device according to claim 1, characterized in that the energy-absorbing bent panels (2-2) are corrugated panels.

4. The explosion-proof device according to claim 1, characterized in that when the explosion-proof device is in a locked state, the outer surface of the energy-absorbing bent plate (2-2) forms a groove body which is concave towards the inner cavity of the box body (1).

5. Explosion protection device according to claim 4, characterized in that the slot is arranged annularly centered on the fastening element (3).

6. The explosion-proof device according to claim 1, characterized in that the edge of the cover plate (2-1) of the box cover (2) is provided with a first flange (2-3) which is opposite to the side wall (1-1) of the box body (1).

7. The explosion-proof device according to claim 6, characterized in that the side wall (1-1) of the box body (1) is provided with a second flange (1-2) opposite to the bottom wall of the box body (1), and the fastener (3) is fixedly connected with the second flange (1-2).

8. The explosion-proof device according to claim 7, characterized in that one end of the second flange (1-2) far away from the box body (1) is provided with a third flange (1-3) with a free end facing the cover plate (2-1), and the fastener (3) is positioned in a cavity formed between the first flange (2-3) and the third flange (1-3).

9. Explosion protection device according to claim 8, characterized in that a sealing ring (4) is provided at the connection of the third flange (1-3) and the cover plate (2-1).

10. Explosion protection device according to claim 1, characterized in that the fastening means (3) comprise a locking cap and a first threaded element fixed to the locking cap, and the tank body (1) is provided with a second threaded element (5) in threaded connection with the first threaded element.

11. The explosion-proof device according to claim 10, further comprising a limiting cylinder (6) sleeved outside the first threaded member, wherein one end of the limiting cylinder (6) is connected with the end face of the locking cap, and the other end of the limiting cylinder is connected with the outer surface of the energy-absorbing bent plate (2-2).

12. Explosion protection device according to claim 10, wherein the second screw (5) is located on the outer surface of the box body (1) and the end supports the energy absorbing bent plate (2-2).

13. Explosion protection device according to claim 1, characterized in that the number of fasteners (3) and the energy-absorbing bent panels (2-2) is multiple, and the thickness of the energy-absorbing bent panels (2-2) is the same or different.

14. The explosion proof device of claim 1, wherein:

the box body (1) and/or the box cover (2) and/or the fastener (3) are metal pieces.

15. Explosion protection device according to any one of claims 1 to 14, wherein the spacing between two adjacent fastening elements (3) is equal or unequal.

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