CN216489410U

CN216489410U - GIS particle trapping apparatus

Info

Publication number: CN216489410U
Application number: CN202123360330.6U
Authority: CN
Inventors: 徐家忠; 张子琛; 石玲玲; 亓云国; 芦非; 周生党; 夏月明; 王金鑫; 温华新
Original assignee: Sdee Hitachi High Voltage Switchgear Co ltd
Current assignee: Sdee Hitachi High Voltage Switchgear Co ltd
Priority date: 2021-12-28
Filing date: 2021-12-28
Publication date: 2022-05-10
Anticipated expiration: 2031-12-28

Abstract

The utility model discloses a GIS particle catching device, which mainly relates to the technical field of particle catching; the collecting device comprises a collecting part and a capturing part, wherein the top of the collecting part is provided with an opening, the capturing part is arranged at the upper part in the collecting part and comprises a supporting frame and a plurality of circular rings arranged at the top of the supporting frame, the circle centers of the circular rings are overlapped, and a certain distance is reserved between every two adjacent circular rings; the utility model discloses the volume is less, the insulating margin influence of electric field is less, catching ability is strong.

Description

GIS particle trapping apparatus

Technical Field

The utility model relates to a particle capture technical field specifically is a GIS particle capture device.

Background

The gas insulated metal enclosed switchgear is used as important power transmission and transformation equipment in an energy channel, and bears important indispensable mission and broad development prospect.

Along with the improvement of the reliability requirement of power grid construction, the extra-high voltage GIS can stably operate for a long time, and has low later maintenance cost and even is free of maintenance, so that the reliability requirement on the extra-high voltage GIS is extremely strict. The product quality of the extra-high voltage GIS directly influences the stable operation of a power grid. With SF6 gas, which is excellent in insulation and arc extinguishing properties, as an insulation and arc extinguishing medium, gas insulation technology has been rapidly developed. However, although SF6 gas has excellent insulating properties in a uniform electric field, the non-uniformity of the electric field seriously degrades the insulating strength thereof.

GIS inevitably produces metal particles in production, transportation, operation process, and metal particle's motion is the main mode that influences GIS dielectric strength. Typical insulation failures caused by particles in GIS are mainly two types, namely air gap breakdown caused by moving particles and creeping flashover caused by particles adhering to the surface of the insulator. On the other hand, the fine particles are accompanied by the occurrence of micro-discharge when they move between electrodes or collide with electrodes, causing changes in gas space charge and the amount of fine particle charge, and the fine metal particles are good conductors, which are important factors for reducing the dielectric strength of a gas medium. On the other hand, there is evidence that insulator creeping over with attached metal particles deteriorates GIS dielectric strength more severely than in the case of air gap breakdown. At the same time, there is an interaction between the metal particles and the insulator surface charge build-up, further increasing the complexity of causing flashover along the surface.

In order to reduce adverse effects of GIS metal particles, the existing method mainly adds particle trap equipment inside the GIS, but due to the fact that the added particle trap equipment is large in size, the electric field value inside the GIS is suddenly changed to a certain extent, and the overall insulation margin of the GIS product is reduced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to solve the problem that exists among the prior art, provide a particle trapping apparatus that volume to GIS is less, the influence of electric field insulation margin is less, the catching ability is strong.

The utility model discloses a realize above-mentioned purpose, realize through following technical scheme:

the utility model provides a GIS particle trapping apparatus, is equipped with open-ended collection portion and sets up the seizure portion on the upper portion in collection portion including the top, seizure portion includes the support frame and sets up in a plurality of ring, a plurality of at the top of support frame the centre of a circle coincidence of ring, and all leave certain distance between two adjacent rings.

Preferably, the support frame comprises a mounting seat, and a plurality of support arms are arranged on the mounting seat in an annular array.

Preferably, the supporting arm is provided with an installation groove matched with the circular ring.

Preferably, the supporting arm is located at the upper part of the mounting seat, and the mounting seat is connected with the collecting part through a bolt.

Preferably, the collecting part is fixed on the outer wall of the GIS cylinder, and the top end of the collecting part is communicated with the GIS cylinder.

Preferably, a collecting part is disposed at a front side and/or a rear side of the insulation tub.

Contrast prior art, the beneficial effects of the utility model reside in that:

1. the utility model discloses a multiple annular structure is adopted to seizure portion, including a plurality of ring, the electric field value distribution of this structure presents the high distribution characteristics of the low inner circle in outer lane, and the particle is changed like this and is removed to the inner circle by the outer lane under the drive of electric field force, has better insulating margin and better particle capture ability. Meanwhile, the multiple annular structures can shield external electric field lines from entering the collecting part, so that the metal impurities entering the bottom of the collecting part are not influenced by the electric field force and lose the motion power of the metal impurities.

2. Because the utility model discloses a size is less, causes that the inside whole electric field value of GIS changes lessly, and the whole insulation margin of product is high, the utility model discloses an electric field value is crescent from edge to center, and the inside metal particle motion of GIS is by low electric field to high electric field motion, and multiple particle trapper has a ability of catching to metal particle around it like this, catches the effect fabulous, and because the utility model discloses a shape of catching portion is multiple annular shape, has the shielding effect to the metal particle who catches, can prevent that it from escaping once more.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the structure of the catching part;

fig. 3 is a reference diagram of the usage state of the present invention.

In the drawings, the reference numbers: 1. a collecting section; 2. a capturing part; 3. a support frame; 31. a mounting base; 32. a support arm; 4. a circular ring; 5. a GIS cylinder; 6. an insulating basin.

Detailed Description

The present invention will be further described with reference to the following specific examples. It should be understood that these examples are only for illustrating the present invention and are not intended to limit the scope of the present invention. Furthermore, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teachings of the present invention, and these equivalents also fall within the scope defined in the present application.

Example (b): as shown in the accompanying drawings 1-3, a GIS particle trapping apparatus, be equipped with open-ended collection portion 1 and set up the portion of catching 2 on the upper portion in collection portion 1 including the top, collection portion 1 is the open thin wall form casing in top, portion of catching 2 includes support frame 3 and sets up in a plurality of ring 4 at the top of support frame 3, a plurality of the centre of a circle coincidence of ring 4, and all leave certain distance between two adjacent rings 4, can directly weld ring 4 on support frame 3.

Preferably, in order to ensure the stability of the circular ring support and facilitate the capture of particles, the support frame 3 includes a mounting seat 31, and the circular array on the mounting seat 31 has a plurality of support arms 32, and four support arms 32 may be provided. Furthermore, every all be equipped with the mounting groove that suits with ring 4 on the support arm 32, can inlay ring 4 in the mounting groove, also can with ring 4 card go into the mounting groove in the back, weld ring 4 on support arm 32 again.

Preferably, the supporting arm 32 is located on the upper portion of the mounting seat 32, the mounting seat 32 is connected with the collecting part 1 through a bolt, the ring 4 is located on the upper side of the supporting arm 32, a certain distance is left between the bottom surface of the supporting arm 32 and the bottom surface in the collecting part 1, for example, the supporting arm 32 can be welded on the upper portion of the outer wall of the mounting seat 32, an upward protruding supporting seat is arranged in the middle of the collecting part 1, a threaded hole is formed in the supporting seat, a mounting hole is formed in the mounting seat, and the mounting seat 32 is fixed on the supporting seat through a bolt. Weld collection portion 1 in the bottom of the GIS barrel 5 that the level was arranged, and offer the window that suits with collection portion 1 in the bottom of GIS barrel 5, collection portion 1 and GIS barrel 5 intercommunication do not reduce the insulation distance of GIS barrel zero potential and conductor high potential after the installation, just the utility model discloses a less great change is not caused to the inside whole electric field of GIS of whole size. When in use, the upper side of the circular ring 4 and the GIS barrel 5 form an electric field shielding surface, and the lower layer of the circular ring 4 is a particle impurity collecting area.

Preferably, the present invention is installed in the region where the electric field safety performance is weak and the particles are easily collected, that is, the collecting part 1 is disposed at the front side and/or the rear side of the insulation tub 6.

The utility model discloses a multiple annular structure is adopted to seizure portion for the electric field on seizure portion surface becomes the increase trend for the outside-in electric field value, and seizure portion inner circle electric field value reaches the highest, and this electric field distribution trend can adsorb particle impurity and remove to the center on every side, and the seizure particle impurity that can be better can increase the trapping ability and avoid losing of catching.

Claims

1. A GIS particle capturing device is characterized in that: be equipped with open-ended collection portion (1) and set up catching portion (2) on upper portion in collection portion (1) including the top, catching portion (2) include support frame (3) and set up in a plurality of ring (4) at the top of support frame (3), a plurality of the centre of a circle coincidence of ring (4), and all leave certain distance between two adjacent ring (4).

2. The GIS particle trap of claim 1, wherein: the support frame (3) comprises a mounting seat (31), and a plurality of support arms (32) are arranged on the mounting seat (31) in an annular array mode.

3. The GIS particle trap of claim 2, wherein: and the supporting arm (32) is provided with a mounting groove matched with the circular ring (4).

4. The GIS particle trap of claim 2, wherein: the supporting arm (32) is positioned at the upper part of the mounting seat (31), and the mounting seat (31) is connected with the collecting part (1) through a bolt.

5. The GIS particle trap of claim 1, wherein: the collecting part (1) is fixed on the outer wall of the GIS cylinder (5), and the top end of the collecting part (1) is communicated with the GIS cylinder (5).

6. The GIS particle trap of claim 5, wherein: the collecting part (1) is arranged on the front side and/or the rear side of the insulating basin (6).