CN215373734U

CN215373734U - Explosion-proof box

Info

Publication number: CN215373734U
Application number: CN202121097412.3U
Authority: CN
Inventors: 刘雷; 李振亚; 施成攀
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 box, wherein the explosion-proof box comprises a box body and a movable cover plate, and the box body is provided with at least one pressure relief opening; the movable cover plate is movably switched between a closed state and a pressure relief state and is arranged on the box body; the movable cover plate is in the closed state to seal the pressure relief opening, and the pressure relief opening is opened when the movable cover plate is in the pressure relief state. The technical scheme of the utility model can improve the use safety of the explosion-proof box.

Description

Explosion-proof box

Technical Field

The utility model relates to the technical field of electrical equipment, in particular to an explosion-proof box.

Background

In the electrical industry, many electronic components or electrical devices have a risk of explosion, for example, devices such as photovoltaic inverters, wind power converters, energy storage devices, and battery systems, when internal power semiconductor devices fail, energy storage components are damaged, or abnormal combustible gas is generated due to various faults, severe physical or chemical explosions may 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.

At present, most of electric appliance manufacturers design the electronic equipment into a box structure, the box structure is only simple protection, when electronic components or equipment in the box explode violently, if the box is weak in deformation capacity and slow in deformation or the physical strength of the fixed part of the shell and the box is insufficient, the shell can fly out quickly under the action of the impact force of explosion, even breaks into small fragments, casualties are easily caused, and the use safety is low.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims to provide an explosion-proof box, aiming at improving the use safety of the explosion-proof box.

In order to achieve the above object, the present invention provides an explosion-proof case for mounting electronic equipment, comprising:

a tank having at least one pressure relief vent; and

the movable cover plate is movably switched between a closed state and a pressure relief state and is arranged on the box body; the movable cover plate is in the closed state to seal the pressure relief opening, and the pressure relief opening is opened when the movable cover plate is in the pressure relief state.

Optionally, the movable cover plate is hinged to the box body, and the movable cover plate can be rotationally switched between the closed state and the pressure relief state.

Optionally, the explosion-proof box further comprises a connecting piece, wherein the connecting piece is connected with the box body and the movable cover plate and used for limiting the rotating angle of the movable cover plate when the pressure relief opening is opened.

Optionally, one end of the connecting piece is connected with the box body, the other end of the connecting piece is connected with the movable cover plate, and the connecting piece can be movably switched between a storage state and a tensioning state; when the connecting piece is in the tensioning state, the movable cover plate is tensioned in the pressure relief state.

Optionally, the connecting member is a pull rope, or a spring, or a telescopic rod.

Optionally, the explosion-proof box further comprises a connecting assembly, and the movable cover plate is connected with the box body through the connecting assembly so as to be in the closed state.

Optionally, the connection assembly comprises:

the positioning column is arranged in the box body and provided with a screw hole;

the positioning hole is arranged on the movable cover plate corresponding to the positioning column; and

and the threaded connecting piece is arranged in the positioning hole in a penetrating way and is in threaded connection with the positioning column through the screw hole.

Optionally, the connection assembly comprises:

the first fastener is arranged on the box body; and

the second fastener is arranged on the movable cover plate, and the first fastener is buckled and connected with the second fastener.

Optionally, the connection assembly comprises:

the first locking part is arranged on the box body and provided with a limiting cavity; and

the second locking part is arranged on the movable cover plate and is provided with a lock pin, and the lock pin can be moved and switched between a storage position and a locking position; the lock pin is received inside the second lock portion when the lock pin is in a receiving position; when the lock pin is in the locking position, the lock pin is inserted into the limiting cavity of the first locking part.

Optionally, the box body is provided with two pressure relief ports, wherein the two pressure relief ports are arranged adjacently, or the two pressure relief ports are arranged oppositely.

According to the technical scheme, the movable cover plate is arranged on the box body and can be movably switched between the closed state and the pressure relief state, when electronic components or equipment in the box body explode, the movable cover plate can be switched from the closed state to the pressure relief state under the action of explosion impact force, so that the pressure relief opening is opened, the impact force generated by explosion can be released from the pressure relief opening, the integral breakage of the box body due to the fact that the huge pressure generated by explosion inside the box body cannot be timely discharged is prevented, the situation that splinters scratch/stab people along with the explosion shock wave is prevented, and the use safety of the explosion-proof box can be 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 some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic structural view of an embodiment of an explosion-proof box of the present invention;

FIG. 2 is a schematic view of the explosion-proof enclosure of FIG. 1 with the removable cover in a closed position;

FIG. 3 is a schematic diagram illustrating a state in which a movable cover plate of the explosion-proof box in FIG. 1 is in a pressure relief state;

FIG. 4 is an enlarged view taken at I in FIG. 3;

FIG. 5 is a schematic diagram of the construction of one embodiment of the connector of the explosion proof tank of FIG. 3;

FIG. 6 is a schematic structural view of another embodiment of a connector of the explosion proof tank of FIG. 3;

FIG. 7 is a schematic structural view of still another embodiment of a connector of the explosion proof tank of FIG. 3;

FIG. 8 is a schematic diagram of one embodiment of a coupling assembly for the explosion proof enclosure of FIG. 1;

fig. 9 is a schematic structural view of another embodiment of a connecting assembly of the explosion-proof tank of fig. 1.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				10	Explosion-proof box	410	Pull rope
100	Box body	420	Spring
				110	Pressure relief port	430	Telescopic rod
120	Hinge assembly	500	Connecting assembly
				130	First pull ring	510	Positioning column
140	First mounting seat	520	Threaded connection
				200	Movable cover plate	530	First fastener
210	Second pull ring	540	Second fastener
				220	Second mounting seat	550	First lock part
300	Upper cover	560	Second lock part
				400	Connecting piece

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In addition, the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

The utility model provides an explosion-proof box.

Specifically, the explosion-proof box is mainly used for electronic equipment which is easy to explode, such as a photovoltaic inverter, a wind power converter, an energy storage device, a battery system and the like, and can be a box body structure of the electronic equipment or an independent box body structure.

Referring to fig. 1 to 3, fig. 1 is a schematic structural view of an embodiment of an explosion-proof box of the utility model; FIG. 2 is a schematic view of the explosion-proof enclosure of FIG. 1 with the removable cover in a closed position; fig. 3 is a schematic view of the explosion-proof box in fig. 1 in a state where a movable cover plate is in a pressure relief state.

In the embodiment of the present invention, the explosion-proof case 10 includes a case body 100 and a removable cover 200; as shown in fig. 1 and 3, the box 100 has at least one pressure relief opening 110, the box 100 has an installation space for installing electronic devices therein, the movable cover 200 is movably switched between a closed state and a pressure relief state and is disposed on the box 100, the movable cover 200 covers the pressure relief opening 110 when in the closed state, and the movable cover 200 opens the pressure relief opening 110 when in the pressure relief state. When the electronic device in the box 100 explodes, the shock wave generated by the explosion pushes the movable cover plate 200 to be switched to the pressure relief state from the closed state, so that the pressure relief opening 110 is opened, the pressure in the box 100 is released, the explosion pressure in the box 100 is prevented from being released in time to cause the box 100 to break and fly out, and more serious safety accidents are avoided.

It can be understood that box 100 may be formed by integrally bending and welding a plate, or by connecting a plate and a profile (corner steel or channel steel) by bolts or assembling and welding, in this embodiment, in order to enhance the overall strength of box 100, box 100 is formed by integrally bending and welding a plate, box 100 has an upper surface and a bottom surface which are opposite to each other, pressure relief opening 110 is formed in a side surface of box 100, removable cover 200 is installed on the side surface of box 100 where pressure relief opening 110 is formed, and size of removable cover 200 is larger than size of pressure relief opening 110. Referring to fig. 2, the upper surface of the box 100 is further provided with a mounting hole (not labeled) through which the electronic device can be mounted in the box 100, and the upper surface of the box 100 is further provided with an upper cover 300 to cover the mounting hole, so as to prevent the electronic device from being exposed to the external environment, and the upper cover 300 is connected to the upper surface of the box 100 through screws.

It is understood that the removable cover 200 may be connected to the box 100 in a rotating manner, or may be connected to the box in a sliding manner. When the movable cover 200 is rotatably connected with the box 100 through the hinge 120 or the rotating shaft, the movable cover 200 is in a closed state under the action of natural gravity, the movable cover is arranged at an angle between the closed state and a pressure relief state, the movable cover 200 can be rotatably switched between the closed state and the pressure relief state, in the process that the pressure relief opening 110 is opened by rotating the movable cover 200, a gradually increased pressure relief channel is formed between the movable cover 200 and the box 100, and the size of the pressure relief channel can be set by limiting the rotating angle of the movable cover 200 and the box 100. When the movable cover 200 is slidably connected to the box 100, the movable cover is parallel to each other between the closed state and the pressure relief state, for example, a sliding groove may be formed in the bottom surface of the box 100, the movable cover 200 is correspondingly provided with a sliding rail capable of sliding in the sliding groove, the movable cover 200 is slidably switched between the closed state and the pressure relief state, when the movable cover 200 slides to open the pressure relief opening 110, the movable cover 200 gradually leaves away from the side surface of the box 100 and forms a gradually increasing pressure relief channel, and the size of the pressure relief channel can be set by limiting the distance from the movable cover 200 to the box 100.

The shape of the box 100 may be various, for example, the shape of the box 100 may be square, rectangular, triangular, or polygonal, and the shape of the box is not limited herein. It is understood that the number of the pressure relief ports 110 may be plural, for example, one, two or more, and the specific number of the pressure relief ports 110 may be set according to the actual pressure relief requirement. Of course, the number of the removable covers 200 is the same as the number of the pressure relief ports 110.

According to the technical scheme, the movable cover plate 200 is arranged on the box body 100, the movable cover plate 200 can be movably switched between the closed state and the pressure relief state, when electronic components or equipment in the box body 100 explode, the movable cover plate 200 can be switched from the closed state to the pressure relief state under the action of explosion impact force, so that the pressure relief opening 110 is opened, the impact force generated by explosion can be released from the pressure relief opening 110, the integral breakage of the box body 100 due to the fact that the huge pressure generated by explosion inside the box body 100 cannot be timely discharged is prevented, the situation that splinters scratch/stab people along with the flying of explosion impact waves is prevented, and the use safety of the explosion-proof box 10 can be improved.

Further, in an embodiment of the present invention, in order to rapidly switch the movable cover 200 from the closed state to the pressure relief state when an explosion occurs, the movable cover 200 is hinged to the box 100. Referring to fig. 3, one end of the movable cover 200 is hinged to the side of the container 100 by a hinge 120, and the movable cover 200 is rotatably switched between a closed state and a pressure-released state. The hinge 120 may be disposed at the top of the side of the box 100, so that the movable lid 200 can be opened upward, and the hinge 120 may also be disposed at the bottom of the side of the box 100, so that the movable lid 200 can be opened downward. In addition, the number of the hinges 120 may be multiple, and the specific number of the hinges 120 may be set according to the size of the removable cover 200.

Further, referring to fig. 3 and 4, in an embodiment of the present invention, in order to prevent the electronic component or the piece of equipment after explosion from flying out from the pressure relief opening 110 while the movable cover 200 opens the pressure relief opening 110 to release the explosion pressure, the hinge 120 is disposed at the bottom of the side of the box 100, so that the movable cover 200 is opened downward. And the explosion-proof box 10 further comprises a connecting member 400, wherein the connecting member 400 is used for limiting the rotation angle of the movable cover plate 200 when the pressure relief opening 110 is opened, and preventing fragments from flying out due to the complete opening of the movable cover plate 200. The connecting member 400 may be a tightening member, which is disposed in the box body 100 and connected to the movable cover 200, and when the movable cover 200 is rotated to the tightening member and is in a tightened state, the movable cover 200 is limited to a predetermined angle by providing a tightening force. The connecting member 400 may also be a limiting member, which may be disposed protruding on the bottom surface of the box 100, and when the movable lid 200 rotates to abut against the limiting member, the limiting member provides an abutting force to limit the movable lid 200 to a predetermined angle. Therefore, the movable cover plate 200 rotates to a preset angle under the impulsive force of explosion, fragments of electronic equipment generated by explosion can fly out of the pressure relief opening 110 along with shock waves, and are retained on the movable cover plate 200 under the blocking of the movable cover plate 200, so that the surrounding people or objects are prevented from being injured. In the present embodiment, the preset angle for opening the removable cover 200 is 60 °, and of course, the specific angle for opening the removable cover 200 can be set according to the size of the box 100 and the actual requirement.

Further, in an embodiment, the connecting member 400 is a tension member, which may be elastic or inelastic, one end of the connecting member 400 is connected to the box 100, the other end is connected to the removable cover 200, and the connecting member 400 is movable between a storage state and a tension state. When the movable cover 200 is in the closed state, the tension member is in the storage state, and when the movable cover 200 is switched from the closed state to the pressure relief state, the tension member is pulled to be in the tension state by the movable cover 200, and provides tension to tension the movable cover 200 at a preset angle.

Alternatively, referring to fig. 5 to 7, the connecting member 400 may be a pulling rope 410, a spring 420, or a telescopic rod 430. Wherein the pulling rope 410 and the spring 420 are elastic, and the telescopic rod 430 is inelastic. When the tension member is the pulling rope 410 or the spring 420, the inner wall of the upper cover 300 is provided with the first pulling ring 130, the inner wall of the removable cover plate 200 is correspondingly provided with the second pulling ring 210, one end of the pulling rope 410 and the spring 420 is connected with the first pulling ring 130, and the other end is connected with the second pulling ring 210, as shown in fig. 5 and 6. When the tightening member is a telescopic rod 430, the inner side of the upper cover 300 is provided with a first mounting seat 140, the inner side of the movable cover plate 200 is provided with a second mounting seat 220, one end of the telescopic rod 430 is rotatably connected with the first mounting seat 140, and the other end is rotatably connected with the second mounting seat 220, as shown in fig. 7.

Further, in an embodiment, in order to keep the movable cover 200 in the closed state under normal conditions, prevent the movable cover 200 from being separated from the case 100 and rotating to a pressure relief state when being subjected to vibration or slight external force (non-explosion), and prevent the electronic components or devices in the case 100 from being exposed to the external environment, the explosion-proof box 10 further includes a connecting assembly 500. As shown in fig. 1 and 2, the flap 200 is coupled to the case 100 by a coupling assembly 500 so that the flap 200 is in a closed state. It can be understood that, the strength of the case 100 and the cover 300 is greater than that of the movable cover 200 and the connecting assembly 500, when the electronic device in the case 100 explodes, the connecting assembly 500 can be opened by the impact force generated by the explosion, so that the movable cover 200 opens the pressure relief opening 110 to release the pressure generated by the explosion.

Optionally, in an embodiment, referring to fig. 2-4, the connection assembly 500 includes a positioning post 510, a positioning hole (not shown), and a threaded connector 520. Wherein, on the box was located to reference column 510, reference column 510 still seted up the screw (not mark), and removable cover is located to the position that the locating hole corresponds reference column 510, and threaded connection spare 520 wears to locate the locating hole and screw and reference column 510 threaded connection to with removable cover spacing in closed state. During normal use of the explosion proof box, the removable cover can be opened by unscrewing the threaded connector 520. It is understood that the threaded connector 520 may be a screw or a combination of a screw and a nut.

Optionally, in an embodiment, referring to fig. 8, the connection assembly 500 includes a first fastener 530 and a second fastener 540. The first fastener 530 is disposed on the box body, the second fastener 540 is disposed on the movable cover 200, and the movable cover 200 is locked and connected with the second fastener 540 via the first fastener 530 and is limited to a closed state. It is understood that the first fastener 530 and the second fastener 540 can have various structures, such as hooks and buckles, one of which is disposed on the box body, and the other of which is disposed on the movable cover plate. In the present embodiment, the connecting component 500 is a snap component, and as shown in the figure, the first fastener 530 and the second fastener 540 are both sub-fasteners of the snap component.

Optionally, in an embodiment, referring to fig. 9, the connection assembly 500 is a lock, which includes a first lock portion 550 and a second lock portion 560. The first locking part 550 is arranged on the box body, the first locking part 550 is provided with a limit cavity (not shown), the second locking part 560 is arranged on the movable cover plate, and the second locking part 560 is provided with a lock pin (not shown) which can move and switch between a storage position and a locking position; when the lock pin is in the storage position, the lock pin is stored inside the second lock portion 560; when the lock pin is in the locked position, the lock pin is inserted into the stopper cavity of the first lock portion 550, so that the flap is stopped in the closed state. It will be appreciated that the second lock portion 560 has an eye into which a key may be inserted to actuate the pin to move between the stowed position and the locked position.

Optionally, in other embodiments, the connection assembly 500 may also be a latch assembly, and may also be a magnetic assembly. For example, when the connecting member 500 is a plug member, it may include a plug and a positioning hole, one of the plug and the positioning hole is disposed on the case 100, the other of the plug and the positioning hole is disposed on the movable cover 200, and the movable cover 200 is in a closed state by the plug-in fit of the plug and the positioning hole. When the connecting assembly 500 is a magnetic assembly, it may include a first magnet disposed on the box and a second magnet disposed on the removable cover, the first magnet corresponds to the second magnet in position, and the magnetic poles of the two opposite surfaces of the first magnet and the second magnet are opposite, the removable cover is magnetically connected to the second magnet through the first magnet and is limited in the closed state.

Further, in the present embodiment, the shape of the box 100 is square, and the box 100 has two pressure relief ports 110. The two pressure relief ports 110 may be disposed adjacently or oppositely. In an embodiment of the present invention, as shown in fig. 3, two pressure relief openings 110 are disposed opposite to each other.

The above description is only an alternative embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. An explosion proof tank, characterized in that it comprises:

a tank having at least one pressure relief vent; and

2. The explosion proof tank as defined in claim 1 wherein said removable cover is hingedly connected to said tank body, said removable cover being pivotally switchable between said closed condition and said pressure relief condition.

3. The explosion-proof tank as set forth in claim 2, further comprising a connecting member connecting said tank body and said flap for limiting an angle of rotation of said flap when said pressure relief vent is opened.

4. An explosion proof tank as set forth in claim 3 wherein said connecting member is connected at one end to said tank body and at the other end to said removable cover.

5. An explosion proof tank as claimed in claim 4 wherein said connecting member is a pull cord, or a spring, or a telescopic rod.

6. An explosion proof tank as claimed in any one of claims 1 to 5 further comprising an attachment assembly by which said removable cover is attached to said tank body so as to place said removable cover in said closed condition.

7. An explosion proof tank as set forth in claim 6 wherein said connection assembly includes:

8. An explosion proof tank as set forth in claim 6 wherein said connection assembly includes:

the first fastener is arranged on the box body; and

9. An explosion proof tank as set forth in claim 6 wherein said connection assembly includes:

10. The explosion vent as set forth in claim 1, wherein said tank body has two pressure relief ports, wherein said two pressure relief ports are disposed adjacently or wherein said two pressure relief ports are disposed oppositely.