RU213385U1 - Dismantling unit of hermetically sealed gas-filled switchgear - Google Patents

Abstract

The utility model relates to the field of electrical engineering and is intended for use in gas-insulated high-voltage switchgears.

The essence of the utility model lies in the fact that the dismantling unit includes a hermetic metal shell made in the form of a bellows with flanges for fastening the first body and the second body, current-carrying pipes interconnected with overlapping screws, a support insulator with a collector, socket contacts, disk-shaped support insulators, filters with adsorbent.

The first housing from the end parts has flanges for fastening, and on the side part it has a branch pipe for gaining access to current-carrying pipes and screws connecting current-carrying pipes, as well as for installing a filter with an adsorbent.

The second body from the end parts has flanges for fastening, and on the side part it has two branch pipes located opposite each other. One of the two branch pipes is designed to install a support insulator with a collector, the second branch pipe - to install a filter with an adsorbent or to install a high-voltage test bushing.

The achieved technical result is to increase the maintainability of the dismantling unit.

The technical result is achieved due to the fact that the dismantling unit of a sealed gas-filled switchgear includes a metal shell made in the form of a bellows with flanges, a first body with a branch pipe, current-carrying pipes, the connection of which is overlapped, while the metal shell has an additional second body with two branch pipes, and the node for connecting current-carrying pipes is moved under the branch pipe of the first body. 4 ill.

Description

Field of technology to which the utility model belongs

The utility model relates to the field of electrical engineering and can be used in gas-insulated high-voltage switchgears.

State of the art

From the prior art, a transverse dismantling unit of a complete gas-insulated switchgear is known, described in the utility model patent of the Russian Federation No. 154094, publ. 08/10/2015, which contains a metal shell, its fastening flanges, electrically connected conductors, while the shell is made in the form of a bellows compensator, and the specified connection of the current conductors is overlapped, and the plane of this connection is located along the longitudinal axis of the current conductors.

The device, the design of which is described in the utility model patent of the Russian Federation No. 154094, has the following disadvantages:

- the need to move the device in the transverse direction to take it out for repair, which greatly complicates the process of mounting and dismantling the device, and in the absence of the possibility of moving the device completely eliminates it;

- the location of the socket contacts and the junction of the conductors inside the bellows, which has a ribbed surface, can lead to an increase in the inhomogeneity of the electric field, which in turn can lead to a decrease in the reliability of the unit and the need to increase the insulation distances, followed by an increase in the outer diameter of the unit;

- dismantling and installation of current conductors is carried out in a limited narrow space through the gap formed as a result of compression of the bellows, while during work with the screws of the current conductors, to separate them, there is a risk of damage to the sealing surfaces of the bellows flange and the flange of the body adjacent to it with a tool, which reduces reliability of the entire sealed gas-filled switchgear.

Disclosure of the essence of the utility model

The objectives of the claimed utility model are to simplify the process of installation and dismantling of a sealed gas-filled switchgear, as well as to increase reliability.

The technical result of the claimed utility model is to increase the maintainability of the dismantling unit.

The tasks are achieved by changing the shell of the block, as well as by transferring the mount of the conductors and changing the way they are connected to each other.

The above technical result is achieved due to the fact that the dismantling unit of a sealed gas-filled switchgear includes a metal shell made in the form of a bellows with flanges, the first housing with a branch pipe and the second housing, current-carrying pipes, support insulators, while the second housing is made with two additional nozzles located opposite each other.

An increase in the reliability and maintainability of the dismantling unit is provided by making the second body with two branch pipes. One of the nozzles mentioned above is designed to install an additional support insulator with a collector to ensure high resistance of the structure to the effects of electrodynamic forces during the flow of a short circuit current. The second branch pipe is designed to install a high-voltage test bushing, to enable high-voltage testing of the module and, if necessary, of the entire sealed gas-filled device. In the operating condition of the complete switchgear, the second branch pipe is used as a place for installing an additional volume of adsorbent to reduce the humidity of the insulating medium.

Placement of the current-carrying pipes connection unit under the branch pipe of the first housing provides the tool with free access to the screws connecting the current-carrying pipes, and simplifies the process of installation and dismantling, which in turn increases the reliability and maintainability of the entire dismantling unit.

The overlap connection of the current-carrying pipes and the placement of the connection of the current-carrying pipes and socket contacts outside the bellows reduces the inhomogeneity of the electric field in critical places and, as a result, allows to reduce the inner diameter of the shell and increases the reliability of the entire dismantling unit.

Brief description of the drawings

The essence of the claimed technical solution is illustrated by drawings (Fig. 1, Fig. 2, Fig. 3, Fig. 4), which shows a device - a dismantling unit of a sealed gas-filled switchgear.

List of items on the drawings:

1 - bellows;

2, 3 - bellows flanges;

4 - the first building;

5 - second building

6, 7 - current-carrying pipes;

8 - screws,

9 - support insulator;

10 - collector;

11 - socket contacts;

12 - dish-shaped support insulators;

13 - filters;

14, 15 - flanges for fastening the first body;

16 - branch pipe of the first body;

17, 18 - flanges for mounting the second body;

19, 20 - branch pipes of the second body;

21 - test high-voltage input.

On FIG. 1 shows a general view of the dismantling unit of a gas-filled switchgear in the working position (in section).

On FIG. 2 shows a general view of the dismantling unit of a gas-filled switchgear during the dismantling of current-carrying pipes (in section).

On FIG. 3 shows a general view of the dismantling block of a gas-filled switchgear with disconnected current-carrying pipes and a compressed bellows (in section).

On FIG. 4 shows a general view of the dismantling unit of a gas-filled switchgear with a high-voltage test bushing installed (in section).

The dismantling unit includes a hermetic metal shell made in the form of a bellows 1 with flanges 2, 3 for fastening the first body 4 and the second body 5, current-carrying pipes 6, 7, overlapped by screws 8, a support insulator 9 with a manifold 10, socket contacts 11, plate-shaped support insulators 12, filters 13 with adsorbent (not shown in the drawings).

The first body 4 from the end parts has flanges 14, 15 for fastening, and on the side part it has a branch pipe 16 for gaining access to current-carrying pipes 6, 7 and screws 8 connecting current-carrying pipes 6, 7, as well as for installing a filter 13 with an adsorbent ( not shown in the drawings).

The second body 5 from the end parts has flanges 17, 18 for fastening, and on the side has two branch pipes 19, 20 located opposite each other. Branch pipe 19 is intended for installation of support insulator 9 with collector 10. Branch pipe 20 is intended for installation of filter 13 with adsorbent (not shown in the drawings) or for installation of test high-voltage bushing 21.

Implementation of the utility model

The operation of the dismantling unit is carried out as follows.

When dismantling the apparatus fixed to the mentioned unit, it is necessary to disassemble the current-carrying pipes 6, 7 by unscrewing the screws 8 through the branch pipe 16 in the first housing 4. Move the current-carrying pipes 6, 7 at an angle to the longitudinal axis of the first housing 4 in different directions relative to each other as shown in FIG. 2. Remove the current-carrying pipe 6 from the socket contact 11 and move it inside the second housing 5 as shown in FIG. 3. Then it is necessary to compress the bellows 1 and remove it by shifting it in the transverse direction as shown in Fig. 3. After removing the bellows, it is possible to dismantle the device.

Installation is carried out in the reverse order, and if it is necessary to carry out high-voltage tests in the branch pipe 20 of the second body 5, instead of the filter 13 with the adsorbent, a high-voltage bushing 21 is installed as shown in Fig. 4. After testing, the high-voltage bushing 21 is dismantled, and the filter 13 with the adsorbent is installed back.

Claims (1)

A dismantling unit for a sealed gas-filled switchgear, which includes a metal shell made in the form of a bellows with flanges, a first body with a branch pipe, current-carrying pipes, the connection of which is overlapped, characterized in that the metal shell has an additional second body with two branch pipes, while the assembly connection of current-carrying pipes is moved under the branch pipe of the first body.

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