CN212571896U

CN212571896U - Environment-friendly gas insulation switch cabinet for power distribution network

Info

Publication number: CN212571896U
Application number: CN202020991923.9U
Authority: CN
Inventors: 王超; 向小青; 黄旭飞; 程少勇
Original assignee: Shanghai Electric Group Corp
Current assignee: Shanghai Electric Group Corp
Priority date: 2020-06-02
Filing date: 2020-06-02
Publication date: 2021-02-19
Anticipated expiration: 2030-06-02

Abstract

The utility model discloses an environment-friendly gas insulated switch cabinet for a power distribution network, which comprises a gas tank shell and is characterized in that two sides of the gas tank shell are provided with side-out cabinet combining sleeves, the side-out cabinet combining sleeves are connected with a grounding bar and an isolating switch moving contact through a bus bar, and the grounding bar is provided with a grounding sleeve; and the lower part of the gas box shell is provided with a solid-sealed polar pole connected with the busbar, and the solid-sealed polar pole is connected with the incoming line epoxy sleeve. The utility model discloses well inlet wire end epoxy sleeve pipe, installation aluminium plate side's earthing terminal sleeve pipe, touch tube all take the slant arrangement mode, and wherein the inlet wire end adopts the slant to arrange the epoxy sleeve pipe, and the earthing terminal also adopts the slant to arrange elements such as three-phase touch tube, sleeve pipe, and this kind of arrangement mode can be under the prerequisite of guaranteeing insulation distance make full use of gas tank inner space, avoids the gas tank oversize and the occupation space who leads to increases, the appearance of cost rising scheduling problem.

Description

Environment-friendly gas insulation switch cabinet for power distribution network

Technical Field

The utility model relates to an environmental protection gas insulated switchgear that distribution network was used belongs to electric power system distribution network complete set switchgear field.

Background

For the field of medium-voltage environment-friendly gas switch cabinets, a primary loop is mainly arranged by silver-plated copper bars which are arranged from left to right, from top to bottom, and the electrical insulation strength of environment-friendly gas is lower than that of commonly used SF₆The traditional copper bar arrangement mode is used for ensuring the insulation distance, so that the requirement on the size of the cabinet body is improved; meanwhile, no matter nitrogen or dry air is used as a gas insulation medium, the temperature rise margin and SF are equal₆The gas phase difference is more than 10K, and the traditional arrangement mode is not beneficial to controlling the temperature rise and solving the heat dissipation problem in the closed gas box.

Disclosure of Invention

The to-be-solved technical problem of the utility model is: how to solve the problem of temperature rise while keeping a small cabinet size.

In order to solve the technical problem, the technical scheme of the utility model is to provide an environmental protection gas insulated switchgear for a power distribution network, which comprises a gas tank shell and is characterized in that side-out cabinet combining sleeves are arranged at two sides of the gas tank shell and are connected with an isolating switch through a main bus bar, a grounding sleeve is arranged on a grounding bar, and the main bus bar and the grounding bar are connected through a moving contact of the isolating switch; and the lower part of the gas box shell is provided with a solid-sealed polar pole connected with the busbar, and the solid-sealed polar pole is connected with the incoming line epoxy sleeve.

Preferably, the solid-sealed polar pole is internally provided with a vacuum bubble, and the busbar is connected with the vacuum bubble arranged in the solid-sealed polar pole through flexible connection.

Preferably, the incoming line epoxy sleeve is connected with the vacuum bulb.

Preferably, the busbar is connected with the busbar static contact pipe or the grounding bar static contact pipe through the three-station isolating switch moving contact to realize the functions of closing, isolating and grounding of the isolating switch.

Preferably, the vacuum bulb is connected with the insulating pull rod.

Preferably, a screw rod is arranged in the three-station isolating switch.

Preferably, the grounding sleeve, the isolating switch moving contact and the incoming line epoxy sleeve are arranged in an inclined mode.

Preferably, the flexible connection and the copper bar are connected by brazing.

The utility model discloses well inlet wire end epoxy sleeve pipe, the earthing terminal sleeve pipe of installation aluminium plate side, earthing touch tube all take the slant arrangement mode, and wherein the inlet wire end adopts the slant to arrange the epoxy sleeve pipe, and the earthing terminal also adopts the slant to arrange elements such as three-phase touch tube, sleeve pipe, and this kind of arrangement mode can be in make full use of gas tank inner space under the prerequisite of guaranteeing insulation distance, avoids the gas tank oversize and the occupation space that leads to increase, the appearance of cost rising scheduling problem. Additionally, the distance between the heating copper bars is increased by arranging the contact tubes in an oblique arrangement mode, and meanwhile, the arrangement mode of soldering the flexible connection on the connecting copper bars is adopted, so that the conduction of current is facilitated, and the problem of temperature rise can be improved to some extent.

The key points are that: the requirement on the size of the cabinet body can be reduced under the condition of ensuring the insulating strength by the oblique arrangement mode of the contact tube and the epoxy sleeve, so that the space can be saved, and the cost can be reduced; the distance between the heating copper bars is increased by changing the oblique arrangement mode of the contact tubes and the epoxy sleeves, and the temperature rise problem can be improved to a certain extent; the soft connection is brazed and has been avoided producing new metal faying surface at the fixed mode of connecting the copper bar to reduce the resistance value in the primary loop, reduced calorific capacity, played the improvement effect to the temperature rise problem.

Drawings

Figure 1 is a schematic structural diagram of the present invention,

fig. 2 is a schematic structural diagram of the present invention.

Detailed Description

In order to make the present invention more comprehensible, preferred embodiments are described in detail below with reference to the accompanying drawings.

As shown in fig. 1 and 2, an environment-friendly gas insulated switchgear for a power distribution network comprises a gas tank shell 11, and is characterized in that two sides of the gas tank shell 11 are provided with side-out cabinet combining sleeves 3, a moving contact 12 of an isolating switch is internally provided with a lead screw 7, the side-out cabinet combining sleeves 3 are connected with a grounding bar 4 through a busbar 2 and the moving contact 12 of the isolating switch, and the grounding bar 4 is provided with a grounding sleeve 1; the lower part of the gas tank shell 11 is provided with a solid-sealed polar pole 10 connected with the busbar 2, the solid-sealed polar pole 10 is connected with the incoming line epoxy casing 5, a vacuum bubble 8 is arranged in the solid-sealed polar pole 10, and the busbar 2 is connected with the vacuum bubble 8 arranged in the solid-sealed polar pole 10 through a flexible connection 9. The vacuum bubble 8 is connected with the insulating pull rod 6.

A three-phase conductive main copper bar loop is arranged in the whole switch cabinet, and the function of connecting with an external circuit is realized through a side-out cabinet combining sleeve 3 and an incoming line epoxy sleeve 5; the busbar 2 is connected with a static contact tube or a grounding bar 4 of the busbar 2 through a three-station isolating switch moving contact 12 to realize the functions of closing, isolating and grounding of the isolating switch; the busbar 2 is connected with a vacuum bubble 8 in the solid-sealed polar pole 10 through a connecting copper bar and a flexible connection 9, and then is connected with an external circuit through the incoming line epoxy sleeve 5. The grounding sleeve 1 and the isolating switch moving contact 12 are obliquely arranged, so that the internal size of the air box is saved; the flexible coupling 9 is brazed on the connecting copper bar, so that the contact surface between copper is reduced, the loop resistance is reduced, and the effect of reducing the heating during power-on is good.

In a primary high-voltage electrifying loop in the air box, the wire inlet end adopts an inclined arrangement mode for the epoxy sleeve 5, and the grounding sleeve 1, the static contact pipe and the like adopt an inclined arrangement mode; the isolating switch connecting copper bar and the vacuum circuit breaker of the embedded pole 10 are fixed by adopting a brazing soft connection 9; the primary conductive loop is completely sealed in the gas box and is filled with nitrogen; the vacuum circuit breaker is sealed in the solid-sealed pole 10 and plays a role of breaking a large-capacity current.

Claims

1. An environment-friendly gas insulation switch cabinet for a power distribution network comprises a gas box shell (11) and is characterized in that side-out cabinet combining sleeves (3) are arranged on two sides of the gas box shell (11), the side-out cabinet combining sleeves (3) are connected with a grounding bar (4) through a bus bar (2) and an isolating switch moving contact (12), and the grounding bar (4) is provided with a grounding sleeve (1); the lower part of the gas tank shell (11) is provided with a solid-sealed polar pole (10) connected with the busbar (2), and the solid-sealed polar pole (10) is connected with the incoming line epoxy casing (5).

2. The environment-friendly gas-insulated switchgear for power distribution networks according to claim 1, wherein vacuum bubbles (8) are provided in the embedded poles (10), and the busbar (2) is connected with the vacuum bubbles (8) provided in the embedded poles (10) through flexible connections (9).

3. The environment-friendly gas-insulated switchgear for power distribution network of claim 1, wherein the busbar (2) is connected to the busbar static contact tube or the grounding bar (4) through the three-position disconnecting switch moving contact (12) to realize the functions of closing, isolating and grounding of the disconnecting switch.

4. An environmentally friendly gas insulated switchgear for electric power distribution networks according to claim 2, characterized in that said vacuum vessel (8) is connected to the insulating tie (6).

5. The environmental protection gas insulation switch cabinet for the distribution network as recited in claim 1, characterized in that the grounding bushing (1), the isolating switch moving contact (12) and the incoming line epoxy bushing (5) are all arranged in an oblique manner.

6. The environmentally friendly gas insulated switchgear for power distribution networks according to claim 2, characterized in that said flexible connection (9) is soldered to the connecting copper bars.