CN116321831A

CN116321831A - Explosion-proof pressure relief component and explosion-proof shell structure

Info

Publication number: CN116321831A
Application number: CN202211738883.7A
Authority: CN
Inventors: 刘鑫宇; 倪春明; 陈思忠; 龙再萌; 周阳; 王�琦
Original assignee: Shanghai Meike Detection Technology Co ltd
Current assignee: Shanghai Meike Detection Technology Co ltd
Priority date: 2022-12-30
Filing date: 2022-12-30
Publication date: 2023-06-23

Abstract

The invention provides an explosion-proof pressure relief member and an explosion-proof shell structure. The mounting component is fastened and mounted with the shell of the flameproof product through the flameproof joint surface of the mounting component so as to communicate with the inner space of the shell; a porous structure forming a pressure relief channel for passage of explosive gases. Wherein, the circumferential interface of pressure release passageway is used for contacting and cooling the explosive gas. Compared with the prior art, the explosion-proof pressure relief member and the explosion-proof shell structure provided by the application are simple in structure, convenient to install and capable of achieving effective explosion-proof and pressure relief effects.

Description

Explosion-proof pressure relief component and explosion-proof shell structure

Technical Field

The invention relates to explosion-proof safety equipment, in particular to an explosion-proof pressure relief member and an explosion-proof shell structure.

Background

Along with mines, particularly coal mines, a large amount of power supplies, such as lithium batteries, are generally arranged to meet the use requirements of various facilities, such as various power equipment, lighting equipment and the like.

In the use process of the power supply in the mine, once the interior possibly generates explosion to generate open fire so as to ignite the whole well, the damage is extremely great, therefore, when the lithium battery is assembled, the battery box of the lithium battery needs to have a shell structure with an explosion-proof function, however, in the prior art, the shell structure of the battery with the explosion-proof function is usually provided with a fire extinguishing device so as to extinguish the fire of the pressure released gas when the explosion is generated in the battery box, and the structure has the following defects: the structure is comparatively complicated, needs firmly set up on the casing in order to avoid the in-process at the pressure release, is exploded out by explosive gas, needs sufficient space to set up structures such as flame arrester simultaneously, puts out a fire the cooling to the gas of burning, and this will occupy the space of a certain amount of battery box, influences the storage capacity of battery, has still greatly increased the manufacturing cost of battery moreover. In addition, the battery box is usually in the condition of fully loading the battery module, and the shell structure of the battery box can provide limited space for installing the explosion-proof pressure relief member, so that the explosion-proof isolation effect is poor.

Therefore, how to provide the explosion-proof pressure relief member and the explosion-proof shell structure is simple in structure, convenient to install and capable of achieving effective explosion-proof and pressure relief effects, and the explosion-proof pressure relief member and the explosion-proof shell structure are technical problems to be solved.

Disclosure of Invention

The invention aims to provide an explosion-proof pressure relief member and an explosion-proof shell structure, which are simple in structure and convenient to install, and realize effective explosion-proof and pressure relief effects.

In order to achieve the above object, the present invention provides an explosion-proof pressure relief member, comprising:

the mounting component is provided with a pressure relief opening and is used for being arranged on a shell of a product to be explosion-proof so as to be communicated with the inner space of the shell;

a porous structure covering the pressure relief vent, forming a pressure relief channel for allowing the passage of an explosive gas;

wherein, the circumferential interface of pressure release passageway is used for contacting and cooling the explosive gas.

Further preferably, the porous structure includes: and a net-shaped through hole structure which is formed by overlapping multiple layers.

Further preferably, the mesh-like through hole structure is a metal mesh of a sheet-like grid structure.

Further preferably, the porous structure further includes: a support net connected to the mounting member; wherein, the netted through hole structure covers and sets up in the relative both sides of supporting network.

Further as a preferred feature of the present invention, the supporting net is a net structure woven by metal wires; the supporting net and the mounting member are integrally formed; the metal wire is a steel wire.

Further preferably, at least five layers of the reticular through hole structures are paved on two opposite sides of the supporting net; wherein the diameter of the metal wire is 1-2 mm; the gap of the metal net is 60-100 meshes; the thickness of the porous structure is 6-8 mm.

Further preferably, the metal mesh has a gap of 75 to 85 mesh; the diameter of the wire body used for forming the metal net is 0.1-0.5 mm.

Further preferably, the explosion pressure in the case is 2Mpa or less.

Further preferably, the mounting member includes: the pressure relief device comprises a main body part provided with a pressure relief groove, a fixed pressing plate which is used for being connected with the main body part after being pressed after the pressure relief groove is filled with the porous structure and is used for being detachably connected with the shell, and a metal gasket which is arranged in the pressure relief groove and is used for being respectively attached to the fixed pressing plate and the porous structure on two opposite sides; wherein, the main body part and the fixed pressing plate are provided with a plurality of pressure relief openings communicated with the pressure relief grooves; and each pressure relief vent is part of the pressure relief channel.

Further preferably, the method further comprises: further comprises: the pressure release groove is arranged in the pressure release groove and used for covering the pressure release opening and being pressed by the metal gasket or the porous structure so as to isolate the covering film of the pressure release channel; the thickness of the coating is 0.2-0.8 mm; wherein the coating is a polyethylene film.

The application also provides an explosion-proof housing structure, include: the explosion-proof pressure relief component.

Compared with the prior art, the explosion-proof pressure relief member and the explosion-proof shell structure provided by the application are simple in structure, convenient to install and capable of achieving effective explosion-proof and pressure relief effects.

Drawings

Fig. 1 is a schematic front view of an explosion-proof pressure relief member according to an embodiment of the present invention;

FIG. 2 is a schematic view of a back structure of an explosion venting member according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of an explosion structure of an explosion venting member according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of a porous structure according to an embodiment of the present invention;

FIG. 5 is a schematic view of the structure of the explosion venting member combined with the housing according to an embodiment of the present invention;

FIG. 6 is a schematic diagram of an explosion venting member in an embodiment of the invention when a plugging test is performed on a housing;

FIG. 7 is a block diagram of test data of a sensor in accordance with an embodiment of the present invention;

FIG. 8 is a diagram showing test data of a sensor without blocking the test in accordance with one embodiment of the present invention;

FIG. 9 is a schematic view of a housing according to an embodiment of the invention;

the drawings illustrate a housing 10, a mounting member 20, a porous structure 30, a mesh-like through-hole structure 30a, a support net 30b, a pressure relief port 200, a main body portion 201, a fixed platen 202, and a membrane 50.

Detailed Description

The flameproof pressure relief member of the present invention will be described in more detail below with reference to the drawings, in which preferred embodiments of the present invention are shown, it being understood that the person skilled in the art can modify the invention described herein while still achieving the advantageous effects of the invention. Accordingly, the following description is to be construed as broadly known to those skilled in the art and not as limiting the invention.

Example 1

The present embodiment provides an explosion-proof pressure relief member, which is mainly composed of a mounting member 20 provided with a pressure relief port, a porous structure 30 covering the pressure relief port, and the like, as shown in fig. 1 to 9.

The mounting member 20 is configured to be disposed on the housing 10 of the product to be explosion-proof, for example, to be fastened to the housing of the explosion-proof product via its explosion-proof joint surface, and then to communicate with the internal space of the housing 10; a porous structure 30 forming a pressure relief channel for passage of explosive gases. The housing 10 may be provided with an exhaust port 101 for flameproof engagement with the mounting member 20.

Through the above-mentioned structure, namely the porous structure 30 is when treating the explosion gas in the casing 10 in the explosion-proof product and stably releasing pressure through forming porous pressure release passageway, utilize self to constitute the circumference interface contact and the cooling explosion gas of pressure release passageway to realize the extinction to the open flame that explosion gas carried, realize the pressure release to the explosion gas, avoid casing 10 to appear breaking because of the explosion. In addition, the pressure release channel is used for releasing the explosive gas and reducing the impact of the explosive gas on the mounting member 20, so that the mounting member 20 can be mounted on the shell 10 in a gluing mode or a fastening piece mode, and the like, and therefore, the explosion-proof and pressure release device is simple in structure and convenient to mount and achieves effective explosion-proof and pressure release effects. In addition, by this member, the explosion-proof protection design thickness of the housing 10 at the time of manufacture can be reduced to save space and cost.

Further preferably, the porous structure 30 may be formed of a mesh-like through-hole structure 30a in which a plurality of layers are stacked, for example: the mesh-like through-hole structure 30a is a metal mesh of a sheet-like lattice structure. It should be noted that, in the present embodiment, the mesh-like through-hole structure 30a may be a metal mesh of a sheet-like grid structure, but may be a mesh-like through-hole structure 30a of another shape, such as a woven mesh.

Moreover, it should be noted that, in the embodiment, the metal mesh is preferably made of steel, and obviously, the metal mesh may also be made of other materials, for example, metal materials with good heat conductivity, such as copper, silver, etc., which are not specifically limited and described herein.

Further preferably, the porous structure 30 further includes: is connected with the mounting member 20 is provided, the support net 30b of (a); wherein the mesh-like through-hole structures 30a are disposed on opposite sides of the support mesh 30 b. Further preferably, the support net 30b is a wire-woven mesh structure; the supporting net 30b and the mounting member 20 are integrally formed, so as to increase the compressive strength of the explosion-proof pressure-releasing member, prevent the metal net 30b from generating irreversible deformation when being impacted, and simultaneously reduce the thickness of the metal net to be overlapped in the porous structure 30 to the greatest extent, so as to reduce the cost and self gravity thereof, thereby facilitating the explosion-proof pressure-releasing member to be firmly attached to the shell 10 of the product to be explosion-proof in a glue connection manner by adopting a small number of fasteners or without adopting fasteners.

Further preferably, the metal wire is a steel wire. It should be noted that, in this embodiment, the wire may be made of other materials, such as copper wires, silver wires, and the like, which have good heat conductive properties, are not particularly limited or described herein.

Further preferably, at least five layers of the mesh-shaped through hole structures 30a are laid on opposite sides of the support net 30 b.

Further preferably, the diameter of the wire is 1 to 2mm. When the metal wire is in the thickness, the thickness and the weight of the metal wire and the integral component can be reduced to the greatest extent under the conditions of improving the compression resistance of the explosion-proof pressure relief component and preventing the metal net from generating irreversible deformation.

Further preferably, the wire body for constituting the metal net has a diameter of 0.1 to 0.5mm.

Further as a preferred feature of the present invention, the gap of the metal net is 60-100 meshes; the thickness of the porous structure 30 is 6 to 8mm. As can be seen from the following table data, the above structural parameters can realize the orderly release of the explosive gas, so that the released explosive gas can be effectively cooled to extinguish the open fire in the process of flowing through the pressure release channel in the porous structure 30, so as to avoid the explosion propagation inside the shell 10 to cause the open fire to overflow outside the shell 10, thereby causing potential safety hazard in a mine or preventing the safety of the inflammable area of the product to be explosion-proof. In addition, compared with the pressure release parameter under the condition, the pressure release parameter is better, namely the pressure release difference is the largest in a short time, so that when explosion occurs in the shell 10 of the product needing explosion isolation, the pressure can be released most quickly, the impact on the shell 10 is reduced, the manufacturing thickness of the shell 10 is reduced, and the cost and the space are saved.

Further preferably, the metal mesh has a gap of 75 to 85 mesh, and under the parameter condition, the cooling effect of the explosion-proof pressure relief member is better, and the thickness design is thinner.

Further preferably, the metal mesh has a gap of 80 mesh, and under the parameter condition, the cooling effect of the explosion-proof pressure relief member is optimal and the thickness is designed to be the thinnest.

Further preferably, the explosion pressure in the case 10 is 2Mpa or less.

Further preferably, the mounting member 20 includes: the device comprises a main body 201 provided with a pressure relief groove, and a fixed pressing plate 202 which is used for being connected with the main body 201 after being pressed after the pressure relief groove is filled with the porous structure 30 and is used for being detachably connected with the shell 10. Wherein, the main body 201 and the fixed pressing plate 202 are provided with pressure relief ports, such as pressure relief port 200 and pressure relief port 200b shown in fig. 2, which are communicated with the pressure relief groove. Each of the

relief ports

200 and 200b is a part of the relief passage. The structure can facilitate the combination of the porous structure and the product needing explosion suppression, and the porous structure with the contact area and the space far larger than the area and the space of the pressure relief opening can absorb and cool the gas when the gas is discharged through the pressure relief openings, so that the orderly discharge of the explosion gas is controlled, the explosion gas is not discharged too quickly, and the explosion gas is not discharged too slowly, so that the explosion is prevented, and the pressure relief time is balanced.

In addition, in this embodiment, the main body and the fixing plate are preferably made of metal, such as copper or stainless steel, so that the exhaust port 101 of the housing 10 can be well sealed, and the explosion gas in the passage Cheng Xieya can be cooled by using the good heat conducting property of the metal and matching with the porous structure, and the heat dissipation area of the metal contacting the outside is larger than that of the porous structure 30, so that the heat transferred by the porous structure 30 can be absorbed, and the heat accumulation of the porous structure 30 after absorbing a certain amount of heat can be avoided, thereby reducing the cooling effect.

In addition, the pressure relief ports of the present embodiment are preferably described by taking only eight rectangular configurations as an example, and the size of each pressure relief port is preferably 10mm×8mm.

It should be noted that, in this embodiment, the main body 201 and the fixed pressing plate 202 are provided with corresponding screw holes, and are detachably connected to the housing 10 by bolts.

Further preferably, the mounting member 20 further includes: the metal gaskets 60 are arranged in the pressure relief groove and are respectively used for being attached to the main body part and the porous structure at two opposite sides, so that the metal gaskets are convenient to be in explosion-proof connection, the porous structure is pressed, and particularly, the surfaces of metal nets in the porous structure are smoothly combined by utilizing the flexible deformation of the metal gaskets, so that gaps are avoided at the joint parts between the metal gaskets.

Here, the metal pad 60 in the present embodiment is preferably a red copper pad. The shape of the fixed pressing plate 202 is preferably plate-shaped, and is also designed into an arc shape or other shapes according to the shape of the housing to be fitted, which is not specifically limited and described herein.

Further preferably, the present embodiment further includes: is disposed between the porous structure 30 and the fixed platen 202 to cooperate with the fixed platen 202 to press the pressing member 70 of the porous structure 30. The thickness of the porous structure 30 in the interior is adjusted by the press-fit member 70 and the cooperation of the fixed pressing plate 202, and the effect of compacting the porous structure 30.

It should be noted that, the metal gasket 60 and the pressing member 70 are provided with a notch for allowing the gas to circulate, such as the notch 601 and the notch 701 shown in fig. 3.

Further preferably, the method further comprises: the covering film 5 is arranged in the pressure relief groove, is used for covering the pressure relief opening 200 and is pressed by the metal gasket or the porous structure 30 so as to isolate the pressure relief channel; through this tectorial membrane 5 can prevent after cutting off the pressure release passageway that steam or dust etc. get into the inside of flameproof housing to the product that needs the flameproof plays good guard action, can have simultaneously after the inside of the product that needs the flameproof produces the explosion, it can be broken by explosion gas rapidly, thereby does not influence the pressure release effect of flameproof pressure release component.

Further preferably, the thickness of the coating 5 is 0.2 to 0.8mm, so that the coating 5 can be broken at the thickness when the pressure of the explosive gas is greater than 0.2 Mpa.

Further preferably, the thickness of the coating may be 0.12mm.

Further, the material of the coating 5 is preferably a polyethylene film material, which is not only low in cost but also durable, and is not easily generated when burst occurs in the inside of the flameproof product.

In addition, it should be noted that the housing structure in the present embodiment is not limited to the housing 10 of the battery, and may be a housing structure of a flammable or explosive object.

In order to better explain the experimental data, in this embodiment, the pressure inside the casing 10 was tested by providing 2 sensors at two opposite positions inside the casing 10 while the explosion-proof pressure release member was sealed and not sealed, as shown in the following figures.

Through the test, referring to the experimental data of the mesh number 120 in the following table 1, the pressures obtained at the positions of 2 sensors are substantially uniform, the sensor 1 position test pressure is decreased from 0.8MPa to 0.31MPa, and the sensor 2 position test pressure is decreased from 0.55MPa to 0.32MPa. The explosion pressure is safely released from the pressure release device, and no other external explosion is caused. The pressure drop of the inner wall of the shell 10 at the non-pressure relief opening is large, so that the inside of the shell 10 is well pressure-relieved. From this, it can be seen that: the explosive gas discharged through the pressure relief port is intensively released through the porous structure 30, and the pressure inside the case 10 is reduced.

In order to illustrate experimental data of the above parameters, as shown in table 1 below, in this embodiment, the porous structure 30 is a flameproof pressure relief member formed by a mesh-like through-hole structure 30a formed by a plurality of stacked metal meshes and a support mesh 30b, and experimental data obtained when performing a flameproof test is performed according to the specification of GB/T3836.2-2021, wherein the metal meshes are made of steel and have a sheet-like grid structure.

Table 1: experimental data of flameproof test

As can be seen from table 1 above: when the mesh number of the metal net of the porous structure is 60-100 meshes, the overall thickness of the porous structure is 6-8 mm, the metal net is provided with the explosion-proof pressure relief member of the porous structure, and explosion is generated in the shell of the explosion-proof product when the metal net is used, the explosion-proof pressure relief member can effectively prevent explosion propagation and deformation of the metal net in the shell due to good quick pressure relief.

Example two

The embodiment provides an explosion-proof housing structure, includes: the explosion-proof pressure relief member in the first embodiment.

Compared with the prior art, the explosion-proof pressure relief member and the shell structure provided by the application are simple in structure, convenient to install and capable of achieving effective explosion-proof and pressure relief effects.

Specifically, the flameproof housing structure in the present embodiment may preferably be a housing structure of a battery, for example: it should be noted that, the explosion-proof housing structure in this embodiment may not be limited to the housing structure of the lithium battery, but may be a housing structure of other types of explosion-proof products.

The foregoing is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Any person skilled in the art will make any equivalent substitution or modification to the technical solution and technical content disclosed in the invention without departing from the scope of the technical solution of the invention, and the technical solution of the invention is not departing from the scope of the invention.

Claims

1. An explosion-proof pressure relief member, characterized by comprising:

2. The explosion-proof pressure relief member according to claim 1, wherein said porous structure comprises: and a net-shaped through hole structure which is formed by overlapping multiple layers.

3. The explosion-proof pressure relief member according to claim 2, wherein said mesh-like through-hole structure is a metal mesh of a sheet-like lattice structure.

4. The explosion-proof pressure relief member according to claim 2, wherein said porous structure further comprises: a support net connected to the mounting member; wherein the reticular through hole structures are arranged on two opposite sides of the supporting net in a covering way; the supporting net is a net structure woven by metal wires; the support net and the mounting member are integrally formed.

5. The explosion-proof and pressure relief member according to claim 4, wherein at least five layers of said reticulated through-hole structures are laid on opposite sides of said support mesh; wherein the diameter of the metal wire is 1-2 mm; the gap of the metal net is 60-100 meshes; the thickness of the porous structure is 6-8 mm.

6. The explosion-proof pressure relief member according to claim 2, wherein the metal mesh has a gap of 75-85 mesh; the diameter of the wire body used for forming the metal net is 0.1-0.5 mm.

7. The explosion-proof pressure relief member according to claim 6, wherein the explosion air pressure in said housing is 2Mpa or less.

8. The explosion-proof pressure relief member according to claim 1, wherein said mounting member comprises: the pressure relief device comprises a main body part provided with a pressure relief groove, a fixed pressing plate which is used for being connected with the main body part after being pressed after the pressure relief groove is filled with the porous structure and is used for being detachably connected with the shell, and a metal gasket which is arranged in the pressure relief groove and is used for being respectively attached to the fixed pressing plate and the porous structure on two opposite sides; wherein, the main body part and the fixed pressing plate are provided with a plurality of pressure relief openings communicated with the pressure relief grooves; each pressure relief opening is a part of the pressure relief channel; the main body part and the fixed pressing plate are metal components.

9. The explosion-proof pressure relief member according to claim 8, further comprising: the pressure release groove is arranged in the pressure release groove and used for covering the pressure release opening and being pressed by the metal gasket or the porous structure so as to isolate the covering film of the pressure release channel; the thickness of the coating is 0.2-0.8 mm; wherein the coating is a polyethylene film.

10. An explosion-proof housing structure, characterized by comprising: the explosion-proof pressure relief member according to any one of claims 1 to 9.