CN114630536B

CN114630536B - Protective cover plate

Info

Publication number: CN114630536B
Application number: CN202210319516.7A
Authority: CN
Inventors: 张熙; 黄匀飞; 余江盛; 袁灼光
Original assignee: Guangdong Power Grid Co Ltd; Dongguan Power Supply Bureau of Guangdong Power Grid Co Ltd
Current assignee: Guangdong Power Grid Co Ltd; Dongguan Power Supply Bureau of Guangdong Power Grid Co Ltd
Priority date: 2022-03-29
Filing date: 2022-03-29
Publication date: 2024-02-13
Anticipated expiration: 2042-03-29
Also published as: CN114630536A

Abstract

The invention belongs to the technical field of electrical equipment, and discloses a protective cover plate, which comprises a cover plate body and an explosion-proof film, wherein the cover plate body is arranged on a box body, the cover plate body is provided with a through hole, the explosion-proof film is made of flexible materials, the explosion-proof film is arranged on the cover plate body, the explosion-proof film is paved on the through hole and can seal the through hole, the connection part of the explosion-proof film or the explosion-proof film and the cover plate body can be broken by gas exceeding a set pressure in a containing cavity, when an electrical device explodes, the pressure in the containing cavity is increased instantaneously, if the air pressure is very high, an explosion air flow can pass through the through hole and break the connection part of the explosion-proof film or the explosion-proof film and the cover plate body, and the air part exceeding the set pressure generated by the explosion in the box body is discharged into the atmosphere to prevent the explosion and the box body from being broken by detonation. If the air pressure is large, the explosion-proof film is not broken and is always sealed on the through hole, and at the moment, the explosion-proof film can prevent fragments generated by explosion of the electric device from flying outside the box body so as to prevent the fragments from scratching people and objects around the box body.

Description

Protective cover plate

Technical Field

The invention relates to the technical field of electrical equipment, in particular to a protective cover plate.

Background

Along with the application of the flexible direct current transmission technology in a power system, the reliability of an electric device becomes one of key factors of the safety of the power system, along with the development of the technology, the long-term reliable operation of the electric device becomes a problem that must break through, the internal structure of the electric device is complex, so that the maintenance cost is high, and meanwhile, the box body is used for accommodating the electric device, but the electric device cannot fully utilize the space in the box body, the structure is not compact enough, the occupied space is large, and the problem that the comprehensive performance of the electric device is poor exists.

Because the electrical device is in the high temperature running state for a long time, there is the risk of bursting, and the top of box does not normally shelter from or seals the box for ordinary protective cover, when the electrical device operation in-process takes place to burst, the top of box will bear the impact of explosion air current and device piece, leads to the box to burst and damage, influences the use, and then needs to change new box and protective cover, increases maintenance cost.

Therefore, a protective cover plate is needed to solve the above problems.

Disclosure of Invention

The invention aims to provide a protective cover plate which is used for discharging high-pressure gas generated by explosion of an electric device out of a box body, avoiding the explosion and damage of the box body or preventing explosion fragments from flying out of the box body.

In order to solve the problems existing in the prior art, the invention adopts the following technical scheme:

a protective cover for mounting on a housing having a receiving cavity for receiving an electrical device, comprising:

the cover plate body is arranged on the box body and is provided with a through hole which is communicated with the accommodating cavity;

the explosion-proof membrane is made of flexible materials, the explosion-proof membrane is arranged in the cover plate body, the explosion-proof membrane is laid in the through hole and can seal the through hole, and the explosion-proof membrane or the joint of the explosion-proof membrane and the cover plate body can be broken through by gas exceeding the set pressure in the accommodating cavity.

Preferably, the protective cover plate further comprises a grid plate, and the grid plate is arranged on the through hole of the cover plate body.

Preferably, the cover plate body has a first end face and a second end face, the second end face faces the accommodating cavity, the first end face is obliquely arranged relative to a horizontal plane, the first end face has a first end portion and a second end portion, the first end portion is lower than the second end portion, and the first end portion is provided with a drain hole.

Preferably, the protective cover plate further comprises a frame, the frame is located on the first end face, and the water drain hole is located in the frame.

Preferably, the number of the water discharge holes is plural, and the plural water discharge holes are arranged at intervals.

Preferably, the frame and the cover plate body are integrally formed.

Preferably, the protective cover plate further comprises a buffer layer made of an insulating material, and the buffer layer is arranged on the second end face of the cover plate body.

Preferably, the cover plate body is provided with a connection hole, and the cover plate body is connected to the box body through the connection hole.

Preferably, the rupture disc is made of a waterproof material.

Preferably, the protective cover plate is made of an insulating material.

The beneficial effects of the invention are as follows:

the invention provides a protective cover plate which is used for being installed on a box body, wherein the box body is provided with a containing cavity for containing electric devices. The through hole is communicated with the accommodating cavity, the explosion-proof film is paved on the through hole of the cover plate body and can seal the through hole, when an electric device suddenly explodes in the operation process, the pressure in the accommodating cavity is increased instantaneously, if the air pressure is very large, the explosion air flow can pass through the through hole and break the explosion-proof film or the joint of the explosion-proof film and the cover plate body, and the explosion-proof film is used for discharging the air which is generated by explosion in the box body and exceeds the set pressure into the atmosphere so as to prevent the explosion of the box body from being broken due to the overhigh air pressure in the accommodating cavity. If the air pressure is large, the explosion-proof film is not broken and is always sealed on the through hole, and at the moment, the explosion-proof film can prevent fragments generated by explosion of the electric device from flying outside the box body so as to prevent the fragments from scratching people and objects around the box body.

Drawings

FIG. 1 is a schematic view of a protective cover plate according to an embodiment of the present invention;

FIG. 2 is a side view of a protective cover plate in an embodiment of the invention;

fig. 3 is a cross-sectional view of a protective cover plate in an embodiment of the invention.

Reference numerals:

1. a cover plate body; 11. a first end face; 12. a second end face; 13. a water discharge hole; 14. a connection hole;

2. an explosion-proof membrane;

3. a frame;

4. a buffer layer;

5. and a grid plate.

Detailed Description

The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.

In the description of the present invention, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are orientation or positional relationships based on those shown in the drawings, merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the invention. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

Because the electrical device is in the high temperature running state for a long time, there is the risk of bursting, and the top of box does not normally shelter from or seals the box for ordinary protective cover, when the electrical device operation in-process takes place to burst, the top of box will bear the impact of explosion air current and device piece, leads to the box to burst and damage, influences the use, and then needs to change new box and protective cover, increases maintenance cost. In this regard, the present embodiment provides a protective cover for discharging high-pressure gas generated by explosion of an electrical device out of a case, avoiding the case from being burst and damaged, or being able to block explosion fragments from flying out of the case.

As shown in fig. 1 to 3, in the present embodiment, the protective cover is located above the case and is used for being mounted on the case, the case has a receiving chamber for receiving an electric device, the protective cover is capable of placing a hatch of the receiving chamber in a closed state, and when the electric device explodes, the protective cover is used for ventilation of an explosion air flow and blocking fragments generated by the explosion from flying outside the case, and is capable of being waterproof. The apron body 1 sets up in the box, and apron body 1 is provided with the through-hole, and the through-hole with hold the chamber intercommunication, explosion-proof membrane 2 is made by flexible material, and explosion-proof membrane 2 sets up in apron body 1, and explosion-proof membrane 2 lays in the through-hole and can seal the through-hole, and explosion-proof membrane 2 or explosion-proof membrane 2 and apron body 1's junction can be broken by holding the intracavity and surpassing the gas of settlement pressure. Specifically, the cover plate body 1 is made of materials such as glass fiber and the like capable of enhancing the strength of the cover plate body, the explosion-proof membrane 2 has certain flexibility, when an electric device suddenly explodes in the operation process, the pressure in the accommodating cavity is instantaneously increased, if the air pressure is very high, explosion air flow can pass through the through hole and break the explosion-proof membrane 2 or the connection part of the explosion-proof membrane 2 and the cover plate body 1, and the explosion-proof membrane is used for discharging the gas which is generated by explosion in the box body and exceeds the set pressure into the atmosphere so as to prevent the explosion of the box body from being broken due to the overhigh air pressure in the accommodating cavity. If the air pressure is large, the explosion-proof membrane 2 is not broken, is always sealed on the through hole and expands along with the impact force of the explosion air flow, and at the moment, the explosion-proof membrane 2 can prevent fragments generated by explosion of the electric device from flying outside the box body so as to prevent the fragments from scratching people and objects around the box body.

Further, with continued reference to fig. 1-3, the protective cover further includes a mesh plate 5, where the mesh plate 5 is disposed on the through hole of the cover body 1. Specifically, when the electric device explodes during operation, the grid plate 5 can block the scraps generated by the explosion of the electric device from flying out, and the scraps stay in the box body so as to prevent the scraps from scratching people and objects around the box body. The aperture of the grid plate 5 cannot be too large, otherwise, the size of the explosion fragments is smaller than that of the grid plate 5, the fragments can pass through the apertures of the grid plate 5 and cannot block the fragments, and the aperture of the grid plate 5 cannot be too small, so that the explosion fragments can be completely blocked, but the gas which exceeds the set pressure and is generated by explosion cannot be discharged out through the grid plate 5 in time, and the possibility of explosion of the box body is caused.

Further, with continued reference to fig. 1-3, the cover plate body 1 has a first end face 11 and a second end face 12, the second end face 12 facing the accommodation chamber, the first end face 11 being disposed obliquely with respect to the horizontal plane, the first end face 11 having a first end portion and a second end portion, the first end portion being lower than the second end portion, the first end portion being provided with a drain hole 13. Specifically, apron body 1 is located the top of box, for the horizontal plane, apron body 1 is the inclined plane structure, the wash port 13 is located the lower one end in apron body 1 inclined plane, wash port 13 is connected outside the box through external water pipe, if weather under the weather or the box top has the circumstances of leaking, when ponding on the apron is too much, the water that will protect to cover up and store up gets into from wash port 13 through apron body 1, outside the box is carried to through external water pipe, avoid water to enter into the holding intracavity, ensure electric devices's normal operating.

Further, with continued reference to fig. 1-3, the protective cover further includes a frame 3, the frame 3 is located on the first end face 11, and the drain hole 13 is located in the frame 3. Specifically, the frame 3 comprises four lateral walls, and four lateral walls are connected in proper order to form closed structure, and the frame 3 is located on the inclined plane of apron body 1 for restrict the rainwater flow direction all around. The drain hole 13 sets up inside confined frame 3, when the upper portion of protective cover board leaks, can converge to first tip along apron body 1 to discharge from drain hole 13, prevent protective cover board because ponding permeates to holding the chamber, produce the destruction to electric device.

Further, with continued reference to fig. 1-3, there are a plurality of drain holes 13, and the plurality of drain holes 13 are arranged at intervals. Specifically, the plurality of water draining holes 13 are formed, and the plurality of water draining holes 13 are located at the first end of the cover plate body 1, so that water flow drained from the inclined surface of the cover plate body 1 can be quickly drained from each water draining hole 13, and water leakage of the protective cover plate is protected.

Further, with continued reference to fig. 1-3, the bezel 3 is integrally formed with the cover body 1. Specifically, frame 3 and apron body 1 pass through cast mode integrated into one piece, reduce the cost of reprocessing manufacturing, simple structure to the hookup location of frame 3 and apron body 1 can not produce the gap, thereby prevent that the rivers from flowing out from this gap, influence the normal operating of the electrical components in the box.

Further, with continued reference to fig. 1 to 3, the cover body 1 is provided with a connection hole 14, and the cover body 1 is connected to the case through the connection hole 14. Specifically, the connecting piece can be a bolt or a screw and the like, the connecting hole 14 is formed in the protective cover plate, a threaded hole is formed in the position, corresponding to the connecting hole 14, of the box body, the connecting piece penetrates through the connecting hole 14 and is in threaded connection with the threaded hole of the box body, the protective cover plate is arranged on the box body, and when an electric device explodes, the protective cover plate can lighten the impact of explosion on the box body and achieves the effect of draining rainwater.

Further, with continued reference to fig. 1-3, the protective cover further includes a buffer layer 4 made of an insulating material, where the buffer layer 4 is disposed on the second end face 12 of the cover body 1. Specifically, buffer layer 4 is made by insulating rubber material, has good insulating and buffering performance, and buffer layer 4 sets up at the second terminal surface 12 of apron body 1, is located and holds the intracavity for buffering and absorbing the impact force when electric device explodes, lightens the impact to the protective cover, guarantees protective cover overall structure's integrality.

Further, with continued reference to fig. 1-3, the rupture disc 2 is made of a waterproof material. Specifically, the rupture disc 2 is located at the first end face 11 of the cover plate body 1 and is laid on the through hole. The explosion-proof membrane 2 is made of a waterproof material and has a waterproof effect, and in the embodiment, one surface of the explosion-proof membrane 2 is used for blocking explosion fragments from flying out and can be broken through by explosion airflow so as to finish the release of high-pressure gas and lighten the explosion impact of the box body. In the process that rainwater flows from the second end part to the first end part of the cover plate body 1, the other surface of the explosion-proof membrane 2 is used for preventing rainwater from entering the accommodating cavity through the through hole, so that the electric device is prevented from being failed when meeting water, and normal use is prevented from being influenced.

Further, with continued reference to fig. 1-3, the protective cover plate is made of an insulating material. Specifically, because the electric device is electrified to operate, the box body and the protective cover plate are made of insulating materials, on one hand, the electric leakage of the electric device is prevented, so that the protective cover plate is conductive, and electric shock danger is caused to personnel, and on the other hand, the protective cover plate has been introduced above to have the function of draining rainwater, so that the rainwater on the protective cover plate can not have any influence on the operation of the electric device due to the insulating property of the protective cover plate, and the reliable operation of the electric device is ensured.

It is to be understood that the above examples of the present invention are provided for clarity of illustration only and are not limiting of the embodiments of the present invention. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the invention. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are desired to be protected by the following claims.

Claims

1. A protective cover for mounting on a housing having a receiving cavity for receiving an electrical device, comprising:

the cover plate body (1) is arranged on the box body, the cover plate body (1) is provided with a through hole, the through hole is communicated with the accommodating cavity, the cover plate body (1) is provided with a first end face (11) and a second end face (12), the second end face (12) faces the accommodating cavity, the first end face (11) is obliquely arranged relative to the horizontal plane, the first end face (11) is provided with a first end part and a second end part, the first end part is lower than the second end part, and the first end part is provided with a water drain hole (13);

the explosion-proof membrane (2) is made of flexible materials, the explosion-proof membrane (2) is arranged on the cover plate body (1), the explosion-proof membrane (2) is paved on the through hole and can seal the through hole, the connection part of the explosion-proof membrane (2) or the explosion-proof membrane (2) and the cover plate body (1) can be broken through by gas exceeding the set pressure in the accommodating cavity, and the explosion-proof membrane (2) is positioned on the first end face (11) of the cover plate body (1);

the protective cover plate further comprises a grid plate (5), and the grid plate (5) is arranged in the through hole of the cover plate body (1).

2. The protective cover plate according to claim 1, further comprising a rim (3) located at the first end face (11), the drain hole (13) being located in the rim (3).

3. The protective cover plate according to claim 2, wherein the number of the water discharge holes (13) is plural, and the water discharge holes (13) are arranged at intervals.

4. The protective cover according to claim 2, characterized in that the rim (3) is integrally formed with the cover body (1).

5. The protective cover according to claim 1, characterized in that the protective cover further comprises a buffer layer (4) made of an insulating material, the buffer layer (4) being arranged at the second end face (12).

6. The protective cover according to claim 1, characterized in that the cover body (1) is provided with a connection hole (14), the cover body (1) being connected to the tank through the connection hole (14).

7. Protective cover according to claim 1, characterized in that the rupture disc (2) is made of a waterproof material.

8. The protective cover plate of claim 1, wherein the protective cover plate is made of an insulating material.