CN215378173U - Electrical equipment and pressure relief device thereof - Google Patents

Abstract

The utility model discloses a pressure relief device of electrical equipment, which comprises a cabinet and a pressure relief piece, wherein the cabinet is provided with a pressure relief hole; the cabinet is provided with a pressure relief hole; the pressure relief piece is arranged at a pressure relief hole of the cabinet; the pressure relief piece is used for opening the pressure relief hole when the impact pressure in the cabinet reaches a preset value. Among the above-mentioned pressure relief device of electrical equipment, the pressure release piece can be opened the pressure release hole when the interior impact pressure of rack reaches the default, and the produced energy passes through the pressure release hole and in time gets rid of when guaranteeing to take place the arcing trouble in the rack, alleviates to avoid even avoiding exploding, and the protection rack is avoided damaging, also improves user's personal safety. The utility model also discloses electrical equipment applying the pressure relief device, which can reduce or even avoid explosion damage caused by arcing faults.

Description

Electrical equipment and pressure relief device thereof

Technical Field

The utility model relates to the technical field of mechanical industry, in particular to a pressure relief device of electrical equipment and the electrical equipment.

Background

With the development of the power industry, more and more electric devices are applied to electric equipment, so that arcing faults occur frequently, and arcing has the characteristics of high temperature and high fault energy, so that once an explosion accident possibly occurs, a cabinet of the electric equipment is damaged, and even the personal safety of a user is threatened.

However, the prior art cannot completely prevent the arcing fault of the electrical equipment, and therefore, how to reduce or even avoid the explosion damage caused after the arcing fault occurs is a problem to be solved urgently by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present invention provides a pressure relief device for electrical equipment, in which a pressure relief member opens a pressure relief hole of a cabinet when an impact pressure in the cabinet reaches a preset value, so as to ensure that energy generated when an arcing fault occurs in the cabinet is timely removed through the pressure relief hole, thereby reducing or even avoiding an explosion, protecting the cabinet from being damaged, and improving personal safety of a user. The utility model also provides electrical equipment applying the pressure relief device, which can reduce or even avoid explosion damage caused by arcing faults.

In order to achieve the purpose, the utility model provides the following technical scheme:

a pressure relief device for an electrical apparatus, comprising:

the equipment cabinet is provided with a pressure relief hole;

the pressure relief piece is arranged at a pressure relief hole of the cabinet; the pressure relief piece is used for opening the pressure relief hole when the impact pressure in the cabinet reaches a preset value.

Preferably, in the pressure relief device for electrical equipment, the pressure relief hole is a knock-off hole, the pressure relief piece is a knock-off hole plate, and an edge of the knock-off hole plate is connected to the cabinet through a plurality of lap joints.

Preferably, in the pressure relief device for electrical equipment, an edge of the knock-out hole plate is connected to the cabinet through a plurality of lap joints.

Preferably, in the pressure relief device for electrical equipment, the lap joints of the knock-out hole plate are non-uniformly distributed along the circumferential direction of the knock-out hole plate.

Preferably, in the pressure relief device for electrical equipment, the lap joint point of the knock-out hole plate is arranged at a sharp corner of the knock-out hole plate.

Preferably, in the pressure relief device for electrical equipment, the knock-out hole is a square hole, an "L" hole, or a "U" hole.

Preferably, in the pressure relief device for electrical equipment, the pressure relief hole is disposed in a bottom plate of the cabinet.

Preferably, in the pressure relief device for electrical equipment, the number of the pressure relief holes is the same as that of the pressure relief pieces, and the pressure relief holes and the pressure relief pieces correspond to each other one by one.

An electrical device comprises a pressure relief device, wherein the pressure relief device is the pressure relief device in any one of the technical schemes.

Preferably, in the above electrical device, the electrical device is an inverter.

The embodiment of the utility model provides a pressure relief device of electrical equipment, which comprises a cabinet and a pressure relief piece, wherein the cabinet is provided with a pressure relief opening; the cabinet is provided with a pressure relief hole; the pressure relief piece is arranged at a pressure relief hole of the cabinet; the pressure relief piece is used for opening the pressure relief hole when the impact pressure in the cabinet reaches a preset value.

Among the above-mentioned pressure relief device of electrical equipment, the pressure release piece can be opened the pressure release hole when the interior impact pressure of rack reaches the default, and the produced energy passes through the pressure release hole and in time gets rid of when guaranteeing to take place the arcing trouble in the rack, alleviates to avoid even avoiding exploding, and the protection rack is avoided damaging, also improves user's personal safety.

The utility model also provides electrical equipment applying the pressure relief device, which can reduce or even avoid explosion damage caused by arcing faults.

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 drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a pressure relief device of an electrical apparatus according to an embodiment of the present invention;

FIG. 2 is an enlarged view of the lap joint of FIG. 1;

fig. 3 is a schematic structural diagram of a pressure relief device of another electrical apparatus according to an embodiment of the present invention;

FIG. 4 is an enlarged view of the lap joint of FIG. 3;

wherein, in fig. 1-4:

a base plate 1; a waist hole 2; a pressure relief member 3; and a lap joint point 4.

Detailed Description

The embodiment of the utility model discloses a pressure relief device of electrical equipment, wherein a pressure relief piece can open a pressure relief hole of a cabinet when the impact pressure in the cabinet reaches a preset value, so that the energy generated when arcing fault occurs in the cabinet is timely eliminated through the pressure relief hole, the explosion is reduced or even avoided, the cabinet is protected from being damaged, and the personal safety of a user is also improved. The embodiment of the utility model also discloses electrical equipment applying the pressure relief device, which can reduce or even avoid explosion damage caused by arcing faults.

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.

Referring to fig. 1-4, an embodiment of the utility model provides a pressure relief device for electrical equipment, including a cabinet and a pressure relief element 3; the cabinet is provided with a pressure relief hole; the pressure relief piece 3 is arranged at a pressure relief hole of the cabinet; the pressure relief piece 3 is used for opening the pressure relief hole when the impact pressure in the machine cabinet reaches a preset value.

Among the above-mentioned pressure relief device of electrical equipment, pressure release 3 can make the pressure release hole of rack open when the interior percussion pressure of rack reaches the default, and the produced energy passes through the pressure release hole and in time gets rid of when guaranteeing to take place the arcing trouble in the rack, alleviates or even avoids exploding, and the protection rack is avoided damaging, also improves user's personal safety.

Preferably, in the pressure relief device for electrical equipment, the pressure relief hole is a knock-out hole, the pressure relief member 3 is a knock-out hole plate, and an edge of the knock-out hole plate is connected to the cabinet through a plurality of lap joints 4, as shown in fig. 1 to 4 (the oval dotted line in fig. 1 to 4 is used to indicate positions of the lap joints); the knock-out orifice plate is used for falling off from the cabinet when the impact pressure in the cabinet reaches a preset value, so that the pressure relief hole is opened.

Of course, the pressure relief hole may be a through hole, and the corresponding pressure relief member 3 may be made of a material having a relatively low strength, such as an aluminum film; the pressure relief piece 3 blocks a pressure relief hole of the cabinet, and the pressure relief piece 3 is used for being damaged when the impact pressure in the cabinet reaches a preset value, so that the pressure relief hole is opened. The present embodiment is not limited to the structure of the pressure relief member 3 and the manner in which the pressure relief member 3 opens the pressure relief hole.

Specifically, in the pressure relief device for electrical equipment, the edge of the knock-out hole plate is connected to the cabinet through a plurality of lap joints 4.

The overlap points 4 of the knock-out plate are distributed non-uniformly along the circumference of the knock-out plate. The lap point 4 of the knock-out hole plate is arranged at the sharp corner of the knock-out hole plate, and the lap point 4 of the knock-out hole plate can also be arranged in the middle of the long side of the knock-out hole plate according to the structure and the size of the knock-out hole plate, as shown in fig. 1, which is not limited in this embodiment.

The lap joint points 4 are arranged at the corners of the knock-out hole plate, so that the knock-out hole can be conveniently machined, and deformation in the machining process is avoided.

The knockout hole is preferably a square hole, but in order to meet the arrangement requirements of the components such as cables inside the cabinet, the knockout hole may also be a special-shaped hole such as an "L" shaped hole (as shown in fig. 1-2) or a "U" shaped hole (as shown in fig. 3-4), and the shape of the knockout hole is not limited in this embodiment.

Specifically, the pressure relief hole is arranged on a bottom plate 1 of the cabinet; the periphery of the bottom plate 1 is provided with a plurality of waist holes 2 which are used for being fixedly connected with the rack of the machine cabinet. The location of the pressure relief vent is preferably located directly below the location where cabinet arcing may occur. The bottom plate 1 is of a tray type structure.

In the pressure relief device, the number of the pressure relief holes is the same as that of the pressure relief pieces 3, and the pressure relief holes correspond to the pressure relief pieces 3 one by one, namely, one pressure relief piece 3 is respectively installed at each pressure relief hole, and different pressure relief pieces 3 are installed at different pressure relief holes.

In the pressure relief device provided in the above embodiment, the number and size of the lap joints 4 are determined according to simulation and test results, and the specific design concept is as follows:

firstly, designing the structure and the size of a pressure relief hole according to the internal layout structure of the cabinet, wherein the size is as large as possible, but the pressure relief hole is prevented from interfering with other parts, so that the shape of the pressure relief hole is generally designed to be in a special shape (such as an L shape or a U shape); then, determining overlap joint points 4 according to the shape of the pressure relief hole, wherein the edge of the pressure relief hole needs to be provided with the overlap joint points 4, and the middle of the long edge can be provided with the overlap joint points, for example, 7 overlap joint points 4 are designed in the figure 1-2; then, arc burning simulation is carried out on the cabinet, and the impact pressures of the cabinet door body and the bottom plate 1 at different moments are respectively obtained through simulation calculation; respectively performing mechanical simulation on the bottom plate 1 and the door body, and performing simulation calculation to obtain the failure strength A of the pressure relief hole and the failure strength B of the door body; when the impact on the bottom plate 1 reaches the failure strength A of the pressure relief hole, the impact pressure on the door body is required to be smaller than the failure strength B of the door body, otherwise, the structure of the pressure relief hole needs to be modified, and the failure strength of the pressure relief hole is reduced until the requirement is met; and finally, performing an arc burning experiment on the cabinet, comparing the difference between the experimental data and the simulation data, optimizing the simulation data and ensuring the reliability of pressure relief.

The working principle of the pressure relief device designed by the process is as follows:

when the inside arcing trouble that takes place of rack, when the impact pressure that the arcing explosion produced reached the destruction intensity A of pressure release hole, the pressure release orifice plate was broken open, made the energy that the arcing produced in time discharge through the pressure release hole, just so can not lead to the fact the continuous impact destruction to the rack door body to the protection rack avoids damaging.

The pressure relief device that this embodiment provided simple structure, with low costs, the pressure release good reliability, the security is high.

The embodiment of the utility model also provides electrical equipment which comprises the pressure relief device, wherein the pressure relief device is the pressure relief device provided by the embodiment.

The electrical device is an inverter.

The electric equipment provided by the embodiment can reduce or even avoid explosion damage caused by arcing faults. Of course, the electrical device provided in this embodiment also has other effects related to the pressure relief device provided in the above embodiments, and details are not described herein.

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 (9)

1. A pressure relief device for an electrical apparatus, comprising:

the equipment cabinet is provided with a pressure relief hole;

the pressure relief piece is arranged at a pressure relief hole of the cabinet; the pressure relief piece is used for opening the pressure relief hole when the impact pressure in the cabinet reaches a preset value;

the pressure relief hole is a knock-off hole, the pressure relief piece is a knock-off hole plate, and the edge of the knock-off hole plate is connected with the cabinet through a plurality of lap joints; or the pressure relief hole is a through hole, and the pressure relief piece is an aluminum film.

2. The pressure relief device of an electrical apparatus of claim 1, wherein an edge of said knock-out plate is connected to said cabinet by a plurality of lap joints.

3. The pressure relief device of an electrical apparatus of claim 2, wherein the overlap points of the knock-out plate are non-uniformly distributed along the circumference of the knock-out plate.

4. The pressure relief device of an electrical apparatus of claim 3, wherein the lap point of the knock-out plate is arranged at a sharp corner of the knock-out plate.

5. The pressure relief device of an electrical apparatus of claim 1, wherein the knock-out hole is a square hole, an "L" hole, or a "U" hole.

6. The pressure relief device of an electrical apparatus of claim 1, wherein said pressure relief hole is disposed in a floor of said cabinet.

7. The pressure relief device of an electrical apparatus of claim 1, wherein the number of said pressure relief holes is the same as the number of said pressure relief members, and there is a one-to-one correspondence therebetween.

8. An electrical apparatus, comprising a pressure relief device according to any one of claims 1 to 7.

9. The electrical device of claim 8, wherein the electrical device is an inverter.

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