CN220107285U

CN220107285U - Inflatable cabinet structure

Info

Publication number: CN220107285U
Application number: CN202321468499.XU
Authority: CN
Inventors: 马阳; 周长江; 向金龙; 亢姣姣; 陈文博; 马丽娜
Original assignee: Xidian Baoji Electric Co ltd; China XD Electric Co Ltd
Current assignee: Xidian Baoji Electric Co ltd; China XD Electric Co Ltd
Priority date: 2023-06-09
Filing date: 2023-06-09
Publication date: 2023-11-28
Anticipated expiration: 2033-06-09

Abstract

The utility model relates to the technical field of high-voltage electrical equipment, and discloses an inflatable cabinet structure. This aerify cabinet structure passes through PT connecting cable lug connection isolator with voltage transformer, and PT connecting cable perpendicular voltage transformer top installation, and no bending stress connects more reliable safety, and voltage transformer sets up in aerifing cabinet structure bottom, and the assembly is more convenient with the maintenance. In addition, this aerify cabinet structure still includes isolation actuating mechanism, through with isolation actuating mechanism drive isolator closed or open, can realize under the condition that main bus does not have a power failure, change voltage transformer to improve whole work efficiency.

Description

Inflatable cabinet structure

Technical Field

The utility model relates to the technical field of high-voltage electrical equipment, in particular to an inflatable cabinet structure.

Background

The air charging cabinet is a control cabinet in which high-voltage elements (including a main busbar, a circuit breaker and the like) are arranged in a closed air chamber filled with lower pressure (absolute pressure is 0.01-0.05 Mpa). The inflatable cabinet is widely applied to places such as small secondary substations, switching stations, box-type substations, residential communities, industrial and mining enterprises, large markets and the like, and is particularly suitable for places such as airports, subways, railways and the like with high electricity requirements and certain highland areas with severe environments.

PT (potential transformer) plays a role in high-voltage electrical equipment mainly in voltage measurement, providing operation and control power supply, and relay protection requirements, etc. The traditional inflatable cabinet voltage transformer is directly spliced to the inflatable cabinet, and the installation position of the voltage transformer is high, so that the voltage transformer is difficult to assemble and replace. And the main bus is required to be powered off to replace the voltage transformer, so that the replacement efficiency of the product is affected.

Based on this, there is a need for an inflatable cabinet structure that solves the above-mentioned problems.

Disclosure of Invention

The utility model aims at:

the utility model provides an aerify cabinet structure, voltage transformer set up in the bottom half, the assembly of being convenient for to need not the main bus power failure and just can change when voltage transformer changes, improve and change efficiency, be convenient for maintain aerifing cabinet structure.

To achieve the purpose, the utility model adopts the following technical scheme:

in a first aspect, an inflatable cabinet structure is provided, including a box body, wherein an upper air chamber, a lower air chamber, a cable chamber, a mechanism chamber and a main bus chamber are separately arranged in the box body, the cable chamber is positioned at the bottom of the box body, and positive-pressure insulating gas is filled in the upper air chamber and the lower air chamber; a main bus bar located in the main bus bar chamber; the voltage transformer is arranged on the lower end face of the cable chamber; the isolating switch is arranged in the upper air chamber and is connected with the voltage transformer and the main bus in series; the isolating driving mechanism is arranged in the mechanism chamber and is in transmission connection with the isolating switch, and the isolating driving mechanism is used for driving the isolating switch to be switched on or switched off or grounded.

Preferably, the device further comprises a rotating seat and an insulating connecting rod, wherein the rotating seat is fixedly arranged in the upper air chamber, a rotating piece is rotatably arranged on the rotating seat, one end of the insulating connecting rod is hinged with the isolating switch, the other end of the insulating connecting rod is hinged with the rotating piece, the isolating driving mechanism can drive the rotating piece to rotate, so that the rotating piece drives the insulating connecting rod to move, and the isolating switch is switched on or switched off or grounded.

Preferably, the lower air chamber is further provided with a first insulating terminal, a first end of the first insulating terminal penetrates through the lower air chamber and is electrically connected with the isolating switch, and a second end of the first insulating terminal is connected with the PT connecting cable.

Preferably, the first insulating terminal is provided with a first conductive interface, the voltage transformer is provided with a second conductive interface, one end of the PT connecting cable is connected with the first conductive interface, and the other end of the PT connecting cable is connected with the second conductive interface.

Preferably, the first conductive interface and the second conductive interface have the same structure.

Preferably, a fuse is arranged on the voltage transformer, and the fuse is used for protecting the voltage transformer.

Preferably, the box body further comprises a grounding busbar, wherein the grounding busbar is arranged in the box body, and a grounding wire on the voltage transformer is connected with the grounding busbar.

Preferably, the lightning arrester further comprises an L-head lightning arrester, wherein the L-head lightning arrester is arranged on the box body, and a grounding wire on the L-head lightning arrester is electrically connected with the grounding busbar.

Preferably, the device further comprises a pressure relief device, wherein the pressure relief device is arranged on the box body and is communicated with the upper air chamber.

Preferably, a desiccant cartridge is disposed within the upper and lower plenums.

The utility model has the beneficial effects that:

the utility model provides an inflatable cabinet structure, wherein a voltage transformer of the inflatable cabinet structure is directly connected with an isolating switch through a PT connecting cable, and the voltage transformer is arranged at the bottom of the inflatable cabinet structure, so that the inflatable cabinet structure is more convenient to assemble and maintain. In addition, this aerify cabinet structure still includes isolation actuating mechanism, through with isolation actuating mechanism drive isolator under the condition that main bus does not have a power failure, changes voltage transformer to high replacement efficiency is convenient for maintain aerifing cabinet structure.

Drawings

FIG. 1 is a cross-sectional view of an inflatable cabinet in an embodiment of the utility model;

fig. 2 is a front view of an inflatable cabinet in an embodiment of the utility model.

In the figure:

A. an upper air chamber; B. a lower air chamber; C. a cable chamber; D. an instrument room; E. a mechanism chamber; F. a rear cabinet body;

1. a main bus; 2. a static contact seat; 3. an insulating connecting rod; 4. isolating the drive mechanism; 5. a grounding seat; 6. a first insulator; 7. a second insulator; 8. a fuse; 9. a voltage transformer; 10. PT connecting cable; 11. an L-head lightning arrester; 12. a grounding busbar; 13. a pressure relief device; 14. a desiccant cartridge; 15. an isolating switch; 16. a connecting bus; 17. a rotating seat; 18. a rotating member;

100. a box body.

Detailed Description

The utility model 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 utility model 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 utility model are shown in the drawings.

In the description of the present utility model, 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 utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, 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", "right", etc. orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are 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 utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

The technical scheme of the utility model is further described below by the specific embodiments with reference to the accompanying drawings.

As shown in fig. 1-2, the present embodiment provides an inflatable cabinet structure, which includes a box 100, wherein an upper air chamber a, a lower air chamber B, a cable chamber C, a mechanism chamber D and a main bus chamber F are separately arranged in the box 100, the cable chamber C is located at the bottom of the box 100, and positive pressure insulating gas is filled in the upper air chamber a and the lower air chamber B. The inflatable cabinet structure further comprises a main bus 1, a voltage transformer 9, an isolating switch 15 and an isolating driving mechanism 4, wherein the main bus 1 is positioned in a main bus chamber F; the voltage transformer 9 is arranged on the lower end face of the cable chamber C; the isolating switch 15 is fixedly arranged in the upper air chamber A, and the isolating switch 15 is connected with the voltage transformer 9 and the main bus 1 in series; the isolation driving mechanism 4 is arranged in the mechanism chamber D, the isolation driving mechanism 4 is in transmission connection with the isolation switch 15, and the isolation driving mechanism 4 is used for driving the isolation switch 15 to be switched on or off or grounded.

This aerify cabinet structure is through passing through PT connecting cable 10 lug connection isolator 15 with voltage transformer 9, and PT connecting cable 10 is perpendicular voltage transformer 9's top installation, and no bending stress connects more reliable safety, and voltage transformer 9 sets up in box 100 bottom, and assembly and maintenance are more convenient. In addition, this aerify cabinet structure still includes isolation actuating mechanism 4, through with isolation actuating mechanism 4 drive isolator 15 under the condition that main bus 1 does not have a power failure, changes voltage transformer 9 to improve and change efficiency, be convenient for maintain aerify cabinet structure.

The embodiment further comprises a rotating seat 17 and an insulating connecting rod 3, wherein the rotating seat 17 is fixedly arranged in the upper air chamber A, a rotating piece 18 is rotatably arranged on the rotating seat 17, one end of the insulating connecting rod 3 is hinged with the isolating switch 15, the other end of the insulating connecting rod 3 is hinged with the rotating piece 18, and the isolating driving mechanism 4 can drive the rotating piece 18 to rotate, so that the rotating piece 18 drives the insulating connecting rod 3 to move, and the isolating switch 15 is switched on or off or grounded.

The embodiment further comprises a grounding busbar 12, wherein the grounding busbar 12 is fixedly arranged in the box body 100, and a grounding wire on the voltage transformer 9 is connected with the grounding busbar 12. When residual current exists in the voltage transformer 9, the residual current can be smoothly led into the ground, so that electric shock or equipment damage is avoided.

The embodiment further comprises an L-head lightning arrester 11, wherein the L-head lightning arrester 11 is arranged on the box body 100, and a grounding wire on the L-head lightning arrester is connected with the grounding busbar 12. The grounding wire of the L-head lightning arrester 11 is electrically connected with the grounding busbar 12, so that the L-head lightning arrester 11 is grounded, lightning can be smoothly guided into the ground by the L-head lightning arrester 11 in thunderstorm weather, electric shock or equipment damage is avoided, and lightning protection effect is achieved.

In this embodiment, the main bus is electrically connected with the static contact base 2, and the isolation driving mechanism 4 can drive the isolation switch 15 to be closed with the static contact base 2, so as to realize conduction between the main bus 1 and the voltage transformer 9, so that the voltage transformer 9 can detect a voltage value in a circuit. In addition, the isolating driving mechanism 4 can also drive the isolating switch 15 to be disconnected from the static contact base 2, so that the voltage transformer 9 is reliably powered off and has obvious fracture. Secondly, the isolation driving mechanism 4 can also drive the isolation switch 15 to be connected with the grounding seat 5 fixed on the box body 100, so that the inside of the lower air box B is reliably grounded and not electrified, and the voltage transformer 9 and the L-head lightning arrester 11 can be overhauled or replaced.

The present embodiment further includes a first insulation terminal 6, a first end of the first insulation terminal 6 is inserted into the lower air chamber B, and the first end is electrically connected with the isolating switch 15, and a second end of the first insulation terminal 6 is connected with the PT connection cable 10. The first insulating terminal 6 is arranged, so that current can not leak to the box body 100, the whole charging cabinet structure is safer, and safety accidents caused by electric leakage are avoided. In addition, a second insulating terminal 7 is further disposed in the box 100, a first end of the second insulating terminal 7 is inserted into the lower air chamber B, the first end is electrically connected with the isolating switch 15, and a second end of the second insulating terminal 7 is connected with the L-head lightning arrester 11. The first insulating terminal 6, the second insulating terminal 7, and the isolating switch 15 are electrically connected by a connecting bus bar 16. Of course, in other embodiments, a plurality of insulated terminals may be disposed at different positions in the case 100 according to specific requirements by those skilled in the art, which will not be described herein.

The first insulating terminal 6 is provided with a first conductive interface, the voltage transformer 9 is provided with a second conductive interface, one end of the PT connecting cable 10 is connected with the first conductive interface, and the other end of the PT connecting cable 10 is connected with the second conductive interface. The structure of the first conductive interface is the same as that of the second conductive interface, so that the upper end and the lower end do not need to be distinguished when the PT connecting cable 10 is installed, and the PT connecting cable is convenient to install directly on site.

The fuse 8 is arranged on the voltage transformer 9, the fuse 8 is used for protecting the voltage transformer 9, and when a line fault occurs, the voltage transformer 9 can be effectively protected, so that the damage of the voltage transformer 9 is avoided, and the maintenance cost is reduced.

The embodiment further comprises a pressure relief device 13, wherein the pressure relief device 13 is arranged on the box body 100 and is communicated with the upper air chamber A. The pressure relief device 13 can relieve pressure in the upper air chamber a when the air pressure in the upper air chamber a exceeds a set pressure, and the same pressure relief device 13 is also arranged at the bottom of the lower air chamber B.

A desiccant cartridge 14 is disposed within the upper and lower plenums a and B. The desiccant is placed in the desiccant box 14, so that the air in the upper air chamber A and the upper air chamber B can be dried, and the humidity of the upper air chamber A and the upper air chamber B is prevented from exceeding a set value, so that the short circuit fault is prevented from occurring in the upper air chamber A and the upper air chamber B.

The box body 100 is made of an aluminum zinc coated steel plate, the aluminum zinc coated steel plate has better corrosion resistance and heat resistance, and the aluminum zinc coated steel plate is stronger and has higher strength, so the box body 100 made of the aluminum zinc coated steel plate is not easy to deform, and the service life of the whole box body can be prolonged. The upper air chamber A and the lower air chamber B in the box body 100 are formed by welding stainless steel plates, and the cable chamber C, the instrument chamber D, the mechanism chamber E and the rear cabinet body F are formed by bending and bolting aluminum-zinc-coated plates. Of course, in other embodiments, the material of the case 100 and each chamber in the case 100 can be replaced according to actual needs by those skilled in the art, and thus, the description is omitted herein.

The rear sealing plate of the box body 100 is also provided with mechanical interlocking, when the voltage transformer 9 is not electrified, the rear sealing plate can be opened, and the box body 100 is opened without discharging due to misoperation or the voltage transformer 9, so that safety accidents occur, and the safety of the inflatable cabinet structure can be ensured by setting the mechanical interlocking.

It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the utility model. 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 utility model are desired to be protected by the following claims.

Claims

1. An inflatable cabinet structure, comprising:

the device comprises a box body (100), wherein an upper air chamber (A), a lower air chamber (B), a cable chamber (C), a mechanism chamber (D) and a main bus chamber (F) are arranged in the box body (100) in a separated mode, the cable chamber (C) is positioned at the bottom of the box body (100), and positive-pressure insulating gas is filled in the upper air chamber (A) and the lower air chamber (B);

a main busbar (1) located in the main busbar chamber (F);

a voltage transformer (9) arranged on the lower end surface of the cable chamber (C);

the isolating switch (15) is arranged in the upper air chamber (A), and the isolating switch (15) is connected with the voltage transformer (9) and the main bus (1) in series;

the isolation driving mechanism (4) is arranged in the mechanism chamber (D), the isolation driving mechanism (4) is in transmission connection with the isolation switch (15), and the isolation driving mechanism (4) is used for driving the isolation switch (15) to be switched on or off or grounded.

2. The inflatable cabinet structure according to claim 1, further comprising a rotating seat (17) and an insulating connecting rod (3), wherein the rotating seat (17) is fixedly arranged in the upper air chamber (a), a rotating piece (18) is rotatably arranged on the rotating seat (17), one end of the insulating connecting rod (3) is hinged with the isolating switch (15), the other end of the insulating connecting rod is hinged with the rotating piece (18), and the isolating driving mechanism (4) can drive the rotating piece (18) to rotate, so that the rotating piece (18) drives the insulating connecting rod (3) to move, and the isolating switch (15) is switched on or off or grounded.

3. The inflatable cabinet structure according to claim 1, further comprising a first insulation terminal (6), a first end of the first insulation terminal (6) being provided through the lower air chamber (B) and being electrically connected to the isolating switch (15), a second end of the first insulation terminal (6) being connected to a PT connection cable (10).

4. A cabinet structure according to claim 3, characterized in that the first insulation terminal (6) is provided with a first conductive interface, the voltage transformer (9) is provided with a second conductive interface, one end of the PT connection cable (10) is connected with the first conductive interface, and the other end of the PT connection cable (10) is connected with the second conductive interface.

5. The inflatable cabinet structure of claim 4, wherein the first conductive interface is identical in structure to the second conductive interface.

6. The inflatable cabinet structure according to claim 1, characterized in that a fuse (8) is arranged on the voltage transformer (9), and the fuse (8) is used for protecting the voltage transformer (9).

7. The inflatable cabinet structure according to claim 1, further comprising a grounding busbar (12), wherein the grounding busbar (12) is arranged in the box body (100), and a grounding wire on the voltage transformer (9) is electrically connected with the grounding busbar (12).

8. The inflatable cabinet structure according to claim 7, further comprising an L-head arrester (11), wherein the L-head arrester (11) is disposed on the box body (100), and a ground wire on the L-head arrester (11) is electrically connected with the ground busbar (12).

9. The inflatable cabinet structure according to claim 1, further comprising a pressure relief device (13), wherein the pressure relief device (13) is arranged on the tank (100) and is in communication with the upper air chamber (a).

10. The cabinet structure according to claim 1, characterized in that a desiccant box (14) is provided in the upper air chamber (a) and the lower air chamber (B).