Resistance tester for facilitating installation of workpiece

Abstract

The invention discloses a resistance tester for facilitating the installation of a workpiece, comprising a resistance tester body, wherein an array of one side of the resistance tester body is provided with a plurality of placement slots, and a workpiece holder for placing a workpiece is movably installed in each placement slot. One side of the workpiece holder extends to the outside of the placement slot, one side, positioned outside the placement slot, of the workpiece slot is provided with a workpiece groove, two sides of the workpiece groove are provided with installation grooves arrangedin the workpiece holder, the inner wall of the side of the installation groove far from the opening is provided with a through hole, the through hole is movably provided with a slide rod therein, andtwo ends of the slide rod extend to the outside of the through hole. The resistance tester can facilitate the stable clamping of the workpiece by an extrusion block, and can firmly clamp workpieces ofvarious shapes, at the same time can facilitate the stable movement of the workpiece holder into the placement slot, and can stabilize the position of the workpiece holder after moving out the workpiece holder. The resistance tester can prevent the workpiece holder from being damaged, and is simple in structure and easy to use.

Description

technical field [0001] The invention relates to the technical field of resistance testers, in particular to a resistance tester which is convenient for workpiece installation. Background technique [0002] In recent years, many substations in China have caused expansion accidents due to lightning strikes, most of which are related to the unqualified grounding resistance of the grounding grid. The grounding grid plays the role of working grounding and protective grounding. When the grounding resistance is too large, the neutral point will The increase of voltage deviation may make the healthy phase and neutral point voltage too high, exceeding the level required for insulation and causing equipment damage. The equipment is threatened by counterattack, and the lightning resistance level of the live conductor of the protective equipment (overhead transmission line and substation electrical equipment) of the grounding grid itself is reduced, which fails to meet the design requir...

AI Technical Summary

Problems solved by technology

[0002] In recent years, many substations in China have caused expansion accidents due to lightning strikes, most of which are related to the unqualified grounding resistance of the grounding grid. The grounding grid plays the role of working grounding and protective grounding. When the grounding resistance is too large, the neutral point will The increase of voltage deviation may make the healthy phase and neutral point voltage too high, exceeding the level required for insulation and causing equipment damage. The equipment is threatened by counterattack, and the lightning resistance level of the live conductor of the protective equipment (overhead transmission line and substation electrical equipment) of the grounding grid itself is reduced, and the equipment is damaged if it fails to meet the design requirements

At the same time, whether the grounding resistance of the grounding system is qualified is directly related to the personal safety of substation operators and substation maintenance personnel. However, because the soil has a corrosive effect on the grounding device, as the operating time increases, the grounding device will be corroded, affecting the safe operation of the substation. ; Therefore, it is very important to regularly monitor the grounding resistance of the ground grid

[0003] The patent application number is 201210448484.7 discloses an insulation resistance tester, including an insulation tester, a resistance tester, and a test bench. Composition, the insulation tester and the resistance tester are connected to the single-chip microcomputer, the single-chip microcomputer and the executive element control the test sequence of several workpiece mounting seats and the workpieces of each workpiece mounting seat The test item is tested. The advantage of this invention is that the insulation tester and the resistance tester are integrated through the test bench, and the automatic control test is realized by the single-chip microcomputer. The test process reduces human factors, improves the accuracy of the test, and the test bench is convenient for workpiece installation. The test efficiency is significantly improved. However, the workpiece mounting seat of the resistance tester is in use, which is not convenient for the installation and use of the workpiece, and the workpiece mounting seat protrudes outside, and it is easy to cause damage to the workpiece mounting seat when not in use.

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