Power-frequency voltage-withstanding partial discharge test tool for insulating part for GIS (Gas Insulated Switchgear)

Abstract

The utility model discloses a GIS-used insulator power frequency withstand voltage partial discharge test tool comprising a substrate, the bottom of the substrate is symmetrically and rotatably provided with two groups of pulleys, a plurality of insulators used for testing are arranged above the substrate, an upper cover plate is commonly arranged above the plurality of insulators, and the upper cover plate is arranged above the plurality of insulators. A connecting seat is fixedly arranged at one end of the upper cover plate, a conducting rod is arranged on the connecting seat, and one end of the conducting rod extends out of the upper cover plate. According to the utility model, insulation torsion bars, insulation cylinders and other insulators with different sizes and models can be tested, and the substrate and the cover plate are designed according to the size of the tank body of the withstand voltage test tank, so that a large number of insulation product tests can be carried out at one time, the cost for manufacturing the tool is effectively saved, and the stacking of the tool is reduced, thereby effectively utilizing the space and improving the working efficiency. The operation is convenient and fast, and the test efficiency is effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of insulator performance testing technology, and in particular to a test fixture for power frequency withstand voltage partial discharge of GIS insulating components. Background Technology

[0002] Insulators in power systems need to withstand long-term power frequency voltage and potential overvoltage surges. Power frequency withstand voltage testing is a crucial method for verifying the insulation performance of insulators under power frequency voltage. It is primarily used to assess the insulator's withstand capability under normal operating voltage and overvoltage conditions. Power frequency withstand voltage testing can detect internal defects in the insulator that lead to decreased insulation performance or even insulation breakdown, such as insulation aging, localized damage, or manufacturing process problems. Partial discharge testing is an important means of detecting partial discharge phenomena inside insulators. It is mainly used to assess the insulation performance of insulators under long-term operating voltage. Partial discharge refers to the discharge phenomenon caused by an excessively concentrated local electric field inside or on the surface of the insulating medium. Although this discharge has relatively low energy, its long-term existence leads to gradual aging and damage of the insulating material, potentially causing insulation breakdown. Partial discharge testing can detect defects such as bubbles, impurities, and conductor burrs inside the insulator. These defects are the root cause of partial discharge; through testing, insulation defects can be detected and addressed in advance, preventing insulation performance deterioration and thus extending the service life of the insulator. With the international development of power equipment, withstand voltage and partial discharge test results have become important evaluation indicators for equipment quality. In order to meet the testing requirements of insulators, a large number of special toolings are often required for different insulators at present, which greatly exacerbates the waste of manpower, financial resources and space. Summary of the Invention

[0003] The purpose of this invention is to provide a test fixture for power frequency withstand voltage partial discharge of insulating components for GIS, thereby solving the technical problems mentioned in the background art.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] This utility model discloses a power frequency withstand voltage partial discharge test fixture for GIS insulating components, comprising a base plate, two sets of pulleys symmetrically rotatably arranged at the bottom of the base plate, a plurality of insulators for testing arranged on the top of the base plate, and a common upper cover plate arranged on the top of the plurality of insulators. A connecting seat is fixedly arranged at one end of the upper cover plate, and a conductive rod is arranged on the connecting seat, with one end of the conductive rod extending to the outside of the upper cover plate.

[0006] Furthermore, the upper ends of each of the insulators are respectively provided with springs for contacting the upper cover plate.

[0007] Furthermore, the insulators used for the test are specifically insulating cylinders or insulating torsion bars.

[0008] Furthermore, when the insulator used for the test is an insulating cylinder, its lower end is directly attached to the upper surface of the substrate.

[0009] Furthermore, when the insulator used for the test is an insulating torsion bar, its lower end is provided with a lower shield that contacts the substrate, and its upper end is provided with an upper shield that contacts the upper cover plate.

[0010] Furthermore, multiple strip-shaped gaps are symmetrically and evenly distributed on both sides of the substrate. When the insulator used for testing is a basin-type insulator, the substrate is fixedly connected to the basin-type insulator fixture for placing the basin-type insulator by bolts passing through each of the two opposite strip-shaped gaps.

[0011] Compared with the prior art, the beneficial technical effects of this utility model are as follows:

[0012] This invention can be used to test various types of insulators, such as insulating torsion bars and insulating cylinders, of different sizes and models. The base plate and cover plate are designed according to the size of the pressure test tank, allowing for the testing of a large number of insulating products at once. This effectively saves the cost of manufacturing tooling and reduces the stacking of tooling, thus making efficient use of space. Furthermore, the operation is convenient and quick, effectively improving the efficiency of testing. Attached Figure Description

[0013] The present invention will be further described below with reference to the accompanying drawings.

[0014] Figure 1 This is a schematic diagram of the structure of the present invention when the insulating cylinder is installed;

[0015] Figure 2 This is a schematic diagram of the structure of the present invention when the insulating torsion bar is installed;

[0016] Figure 3 This is a schematic diagram showing the connection between the substrate and the basin-type insulator fixture.

[0017] Figure 4 This is a schematic diagram of the working state of this utility model;

[0018] Explanation of reference numerals in the attached drawings: 1. Base plate; 2. Strip-shaped gap; 3. Pulley; 4. Top cover plate; 5. Connecting seat; 6. Conductive rod; 7. Insulating cylinder; 8. Insulating torsion bar; 9. Lower shield; 10. Upper shield; 11. Withstand voltage test tank; 12. Partial discharge-free power frequency test transformer; 13. Bolt; 14. Pot-type insulator fixture. Detailed Implementation

[0019] like Figures 1-4As shown, a power frequency withstand voltage partial discharge test fixture for GIS insulating components includes a base plate 1. The base plate is preferably made of a hard metal material such as 45 steel or aluminum alloy to improve its service life. Two sets of pulleys 3 are symmetrically rotatably mounted on the bottom of the base plate to facilitate the movement of the base plate 1 inside the pressure-resistant pressure vessel.

[0020] Multiple insulators for testing are placed on top of the substrate 1. A top cover plate 4 is provided on top of all the insulators. In this embodiment, each of the insulators has a spring at its upper end for contacting the top cover plate 4. The springs between the insulators and the top cover plate 4 allow for better connection between the insulators and the top cover plate. Furthermore, the top cover plate 4 contacts and firmly presses against the springs of all the insulators on the substrate 1, ensuring effective energization while also stabilizing the insulators and preventing them from collapsing.

[0021] A connecting seat 5 is fixedly provided at one end of the upper cover plate 4, and a conductive rod 6 is installed on the connecting seat 5. One end of the conductive rod 6 extends to the outside of the upper cover plate 4.

[0022] In this embodiment, the insulator used for the test is specifically an insulating cylinder 7 or an insulating torsion bar 8.

[0023] like Figure 1 As shown, when the insulator used for the test is an insulating cylinder 7, the insulating cylinder 7 is placed on the substrate 1, with its lower end directly touching the upper surface of the substrate 1.

[0024] like Figure 2 As shown, when the insulator used for testing is an insulating torsion bar 8, a lower shield 9 is provided between its lower end and the substrate 1. After the lower shield 9 is placed on the substrate 1, the insulating torsion bar 8 to be tested is prevented inside the corresponding lower shield 9. An upper shield 10 is provided between the upper end of the insulating torsion bar 8 and the upper cover plate 4. That is, after the upper shield 10 is covered on the upper part of each insulating torsion bar 8, the upper cover plate 4 is installed.

[0025] Multiple strip-shaped gaps 2 are symmetrically and uniformly formed on both sides of the substrate 1, such as... Figure 3 As shown, when the insulator used for the test is a basin-type insulator, the base plate 1 is fixedly connected to the basin-type insulator fixture 14 for placing the basin-type insulator by bolts 13 passing through the two opposite strip-shaped gaps 2.

[0026] like Figure 4As shown, after covering the top cover plate 4 and installing the conductive rod 6 on the connecting seat 5, the entire test fixture is pushed into the withstand voltage test tank 11. The withstand voltage test tank 11 is electrically connected to the power frequency test transformer 12 with or without partial discharge. Then, the power frequency withstand voltage and partial discharge tests can be performed on the insulator inside the withstand voltage test tank 11.

[0027] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A power frequency voltage withstanding partial discharge test tooling for an insulating member for a GIS, characterized by: The utility model discloses a test device for insulator, including the base plate, the bottom symmetrical rotation of base plate is provided with two groups of pulley, the top of base plate is provided with a plurality of insulator for carrying out test, the top of a plurality of insulator is provided with the upper cover plate in common, one end of upper cover plate is fixedly provided with the connecting seat, the connecting seat is provided with the electrically conductive rod, one end of electrically conductive rod extends to the outside of upper cover plate.

2. The power frequency voltage withstanding partial discharge test tooling for insulation of GIS according to claim 1, characterized in that: The upper end of the plurality of insulators is respectively provided with a spring for contacting the upper cover plate.

3. The power frequency voltage withstanding partial discharge test tooling for insulation of GIS according to claim 1, characterized in that: The insulator for carrying out test is specifically an insulating cylinder or an insulating twisted rod or a basin type insulator.

4. The power frequency voltage withstanding partial discharge test tooling for insulation of GIS according to claim 3, characterized in that: When the insulator for carrying out test is an insulating cylinder, the lower end is directly connected with the upper surface of the base plate.

5. The power frequency voltage withstanding partial discharge test tooling for insulation of GIS according to claim 3, characterized in that: When the insulator for carrying out test is an insulating twisted rod, a lower shielding cover is arranged between the lower end and the base plate, and an upper shielding cover is arranged between the upper end and the upper cover plate.

6. The power frequency voltage withstanding partial discharge test tooling for insulation of GIS according to claim 3, characterized in that: The base plate is symmetrically and uniformly provided with a plurality of strip-shaped gaps at both ends, and when the insulator for carrying out test is a basin type insulator, the base plate is fixedly connected with a basin type insulator tool for placing the basin type insulator through bolts penetrating through the two opposite strip-shaped gaps.

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