CN215378170U

CN215378170U - Power distribution cabinet with explosion-proof function

Info

Publication number: CN215378170U
Application number: CN202120771767.XU
Authority: CN
Inventors: 林耀龙; 吴有亮; 许晓婷
Original assignee: Fujian Qunlong Switch Co ltd
Current assignee: Fujian Qunlong Switch Co ltd
Priority date: 2021-04-15
Filing date: 2021-04-15
Publication date: 2021-12-31
Anticipated expiration: 2031-04-15

Abstract

The utility model provides a power distribution cabinet with an explosion-proof function, which comprises: the air-permeable cabinet comprises a cabinet body, wherein the cabinet body is provided with an air-permeable valve, and the internal space of the cabinet body can be communicated with the external space of the cabinet body through the air-permeable valve; the ventilation valve comprises a valve body and an exhaust channel arranged in the valve body, a first port of the exhaust channel is communicated with an exhaust hole formed in the cabinet body, an elastic sheet is arranged on a second port upper cover of the exhaust channel, one side of the elastic sheet is hinged to the edge part of the exhaust channel, and when the pressure in the exhaust channel is larger than a set threshold value, the elastic sheet is opened. According to the power distribution cabinet, when the internal pressure of the cabinet body is increased to a set threshold value due to factors such as aging and temperature rise of electrical elements installed in the cabinet body, the elastic sheet is opened, so that the internal pressure of the cabinet body can be quickly reduced to a safe level, and explosion risks caused by overlarge pressure are prevented.

Description

Power distribution cabinet with explosion-proof function

Technical Field

The utility model relates to the technical field of power distribution cabinets, in particular to a power distribution cabinet with an explosion-proof function.

Background

The power distribution box is also called a power control box and is one kind of distribution box, the distribution box is divided into a power distribution box and a lighting distribution box and is the final-stage equipment of a power distribution system, and the distribution box is formed by assembling switch equipment, a measuring instrument, a protective electrical appliance and auxiliary equipment in a closed or semi-closed metal cabinet or on a screen according to the electrical wiring requirement to form a low-voltage distribution device.

The conventional power distribution cabinet cannot well release pressure when the temperature of an electrical element in the cabinet body is too high, so that explosion is easily caused under electric sparks, the electrical element of a circuit is damaged, and economic loss and even casualties are caused.

SUMMERY OF THE UTILITY MODEL

In order to solve at least one of the technical problems, the utility model provides a power distribution cabinet with an explosion-proof function.

The technical scheme of the utility model is realized as follows:

the embodiment of the utility model provides a power distribution cabinet with an explosion-proof function, which comprises: the air-permeable cabinet comprises a cabinet body, wherein the cabinet body is provided with an air-permeable valve, and the internal space of the cabinet body can be communicated with the external space of the cabinet body through the air-permeable valve;

the ventilation valve comprises a valve body and an exhaust channel arranged in the valve body, a first port of the exhaust channel is communicated with an exhaust hole formed in the cabinet body, an elastic sheet is arranged on a second port upper cover of the exhaust channel, one side of the elastic sheet is hinged to the edge part of the exhaust channel, and when the pressure in the exhaust channel is larger than a set threshold value, the elastic sheet is opened.

As an optional implementation manner, a protection cavity is connected to the upper end of the vent valve, an opening is formed in the top of the protection cavity, a protection cover is arranged on the opening cover, the elastic piece is installed in the protection cavity, and when the elastic piece is opened, the protection cover can be touched to enable the protection cover to be opened.

As an optional embodiment, the outer peripheral wall of the ventilation valve is provided with an external thread, and the ventilation valve is mounted at the top of the cabinet body through the external thread.

As an optional implementation manner, a base is fixedly mounted at the bottom of the cabinet body, a cavity is arranged inside the base, and an explosion-proof opening used for communicating the cabinet body and the cavity is formed in the top of the cavity.

As an alternative embodiment, the explosion-proof opening is embedded and covered with an explosion-proof door, and the explosion-proof door can be opened downwards; one side edge of the explosion-proof door close to the cabinet door of the cabinet body is hinged to the inner edge part of the explosion-proof opening through a hinge, and one side edge of the explosion-proof door far away from the cabinet door is clamped to the inner edge part of the explosion-proof opening through a V-shaped elastic sheet.

As an alternative embodiment, the back of the base is open.

As an alternative embodiment, the base further comprises a striking plate fixedly mounted to the bottom of the chamber; the impact plate is a brittle plate, and a plurality of through holes are formed in the impact plate.

As an optional implementation manner, a support frame for supporting the cabinet body and a mounting frame for mounting an electrical component are fixedly mounted on the inner wall of the cabinet body, the mounting frame is fixedly connected with the support frame, and the support frame is a frame structure and is fixedly mounted on the inner wall of the cabinet body.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the utility model and together with the description serve to explain the principles of the utility model.

Fig. 1 is a schematic structural view of a power distribution cabinet of the present invention;

FIG. 2 is a schematic structural view of a breather valve of the present invention;

FIG. 3 is a schematic structural diagram of a base according to the present invention;

FIG. 4 is an enlarged view of a portion A of FIG. 1;

in the figure: the cabinet comprises a cabinet body 1, a base 2, a support frame 3, a vent valve 4, a protection cavity 41, an electrical element 5, an exhaust channel 6, external threads 7, an elastic sheet 8, a protective cover 9, an explosion-proof opening 10, a cavity 11, an impact plate 12, an explosion-proof door 13 and a V-shaped elastic sheet 14.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are for purposes of illustration only and are not to be construed as limitations of the utility model. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.

In addition, the embodiments of the present invention and the features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

Referring to fig. 1 and 2, an embodiment of the present invention provides a power distribution cabinet with an explosion-proof function, including: the refrigerator comprises a cabinet body 1, wherein the cabinet body 1 is provided with a vent valve 4, and the inner space of the cabinet body 1 can be communicated with the outer space of the cabinet body 1 through the vent valve 4;

the ventilation valve 4 comprises a valve body and an exhaust channel 6 arranged in the valve body, a first port of the exhaust channel 6 is communicated with an exhaust hole formed in the cabinet body 1, an elastic sheet 8 is arranged on a second port of the exhaust channel 6 in a covering mode, one side of the elastic sheet 8 is hinged to the edge portion of the exhaust channel 6, and when the pressure in the exhaust channel 6 is larger than a set threshold value, the elastic sheet 8 is opened.

When the internal pressure of the cabinet 1 rises to a set threshold value due to aging, temperature rise and other factors of the electrical element 5 installed in the cabinet 1, the elastic sheet 8 is opened, so that the internal pressure of the cabinet 1 can be quickly reduced to a safe level, and explosion risks caused by overlarge pressure are prevented.

As an embodiment of this embodiment, a protection chamber 41 is connected to the upper end of the purge valve 4, an opening is formed in the top of the protection chamber 41, the opening is covered by a protection cover 9, the spring plate 8 is installed in the protection chamber 41, and when the spring plate 8 is opened, the protection cover 9 can be touched to open the protection cover 9; although news reports are frequently seen in dangerous situations caused by explosion of the power distribution cabinet, the situation is generally rare for newly-installed power distribution cabinets, and in order to prevent the elastic sheet 8 from being exposed in the air for a long time and prevent the elastic sheet 8 from being damaged due to the influence of factors such as air and dust and the like, and the due effect of the elastic sheet 8 cannot be exerted at a critical moment, in the embodiment, the elastic sheet 8 is arranged in the protection cavity 41, so that the elastic sheet 8 is protected to maintain normal performance under the condition that the elastic sheet 8 is not used for a long time. Meanwhile, the protecting cover 9 should be simply covered on the opening position, and the protecting cover cannot be pressed again, so as to avoid the abnormal opening.

In a preferred embodiment, the outer peripheral wall of the ventilation valve 4 is provided with an external thread 7, and the ventilation valve 4 is mounted on the top of the cabinet through the external thread 7.

Referring to fig. 1 and 3, as an implementation manner of this embodiment, a base 2 is fixedly installed at the bottom of the cabinet 1, a chamber 11 is inside the base 2, and an explosion-proof opening 10 for communicating the cabinet 1 and the chamber 11 is opened at the top of the chamber 11. An explosion-proof door 13 is embedded in the explosion-proof opening 10, and the explosion-proof door 13 can be opened downwards; one side edge of the explosion-proof door 13 close to the cabinet door of the cabinet body is hinged to the inner edge part of the explosion-proof opening 10 through a hinge, and one side edge of the explosion-proof door 13 far away from the cabinet door is clamped to the inner edge part of the explosion-proof opening 13 through a V-shaped elastic sheet 14; the area of the explosion door is slightly smaller than that of the explosion opening. The back of the base 2 is open.

When the unavoidable emergence of explosion of switch board, in this embodiment, because explosion-proof door 13 can open downwards, and explosion-proof door 13 keeps away from one side of cabinet door pass through V type shell fragment 14 joint in the inner edge portion of explosion-proof mouth 13, the blast wave of explosion can break explosion-proof door 13 in the twinkling of an eye to let out from the uncovered at the 2 backs of base, reduce or avoid the blast wave directly from breaking open the cabinet door, lead to personnel injured's risk, carry out the personal safety of the personnel of operating from the cabinet door direction with furthest's guarantee.

As an alternative embodiment, the power distribution cabinet can be installed above an explosion-proof tank (not shown), the explosion-proof tank is filled with a fire-proof and explosion-proof material, and the base 2 further comprises a strike plate 12 fixedly installed at the bottom of the chamber; the impact plate 12 is a brittle plate, and the impact plate 12 is provided with a plurality of through holes, so that when explosion inevitably occurs, the impact wave can break or break the impact wave 12, and the airflow is guided to enter the explosion-proof pool, so that loss is avoided to the maximum extent.

As another alternative of this embodiment, a fire extinguishing material may be contained in the chamber 11, and when the explosion air flow enters the chamber 11, the fire extinguishing material is lifted to perform a fire extinguishing function.

Referring to fig. 1 and 4, as an alternative embodiment of this embodiment, a support frame 3 for supporting the cabinet and a mounting frame for mounting electrical components are fixedly mounted on an inner wall of the cabinet 1, the mounting frame is fixedly connected to the support frame 3, and the support frame 3 is a frame structure and is fixedly mounted on the inner wall of the cabinet. Support frame 3 and mounting bracket are preferred to have the steel material, maintain the overall structure of switch board through support frame 3 to when avoiding the explosion as far as possible to take place, the switch board looses the frame and leads to spare part to splash the injury that causes.

In summary, according to the power distribution cabinet with the explosion-proof function, the whole cabinet body is firmer through the frame structure fixing frame fixedly installed in the cabinet body, so that the cabinet body has impact resistance, the cabinet body has certain air permeability through the connected vent valve, the elastic sheet arranged in the vent valve is pushed up to the state of being bounced open when the air pressure rises due to the temperature rise in the cabinet, so that the internal air pressure is stabilized, the elastic sheet is buckled with the air hole again under the self elasticity after the air pressure is recovered, high-pressure gas generated when the power distribution cabinet explodes is firstly flushed into the cavity through the cavity fixedly installed in the base, and is guided to be discharged from a rear opening or led to an underground explosion-proof pool, so that the damage caused by explosion is reduced to the maximum extent, and the explosion-proof effect is achieved.

It will be understood by those skilled in the art that the foregoing embodiments are merely for clarity of description and are not intended to limit the scope of the utility model. Other variations or modifications will occur to those skilled in the art based on the foregoing disclosure and are within the scope of the utility model.

Claims

1. A power distribution cabinet with explosion-proof function includes: the cabinet body, its characterized in that: the cabinet body is provided with a ventilation valve, and the internal space of the cabinet body can be communicated with the external space of the cabinet body through the ventilation valve;

the ventilation valve comprises a valve body and an exhaust channel arranged in the valve body, wherein a first port of the exhaust channel is communicated with an exhaust hole formed in the cabinet body, an elastic sheet is covered on a second port of the exhaust channel, one side of the elastic sheet is hinged to the edge part of the exhaust channel, and when the pressure in the exhaust channel is greater than a set threshold value, the elastic sheet is opened;

the bottom of the cabinet body is fixedly provided with a base, a cavity is arranged inside the base, and the top of the cavity is provided with an explosion-proof port for communicating the cabinet body and the cavity;

the explosion-proof port is embedded and covered with an explosion-proof door, and the explosion-proof door can be opened downwards; one side edge of the explosion-proof door close to the cabinet door of the cabinet body is hinged to the inner edge part of the explosion-proof opening through a hinge, and one side edge of the explosion-proof door far away from the cabinet door is clamped to the inner edge part of the explosion-proof opening through a V-shaped elastic sheet.

2. The power distribution cabinet according to claim 1, wherein a protection chamber is connected to the upper end of the vent valve, an opening is formed in the top of the protection chamber, a protection cover is arranged on the opening cover, the spring plate is installed in the protection chamber, and when the spring plate is opened, the protection cover can be abutted to open the protection cover.

3. The power distribution cabinet according to claim 1, wherein the outer peripheral wall of the vent valve is provided with an external thread, and the vent valve is mounted on the top of the cabinet body through the external thread.

4. The power distribution cabinet of claim 1, wherein the back of the base is open.

5. The power distribution cabinet of claim 1, wherein the base further comprises a strike plate fixedly mounted to a bottom of the chamber; the impact plate is a brittle plate, and a plurality of through holes are formed in the impact plate.

6. The power distribution cabinet according to any one of claims 1 to 5, wherein a support frame for supporting the cabinet body and a mounting frame for mounting electrical components are fixedly mounted on the inner wall of the cabinet body, the mounting frame is fixedly connected with the support frame, and the support frame is a frame structure and is fixedly mounted on the inner wall of the cabinet body.