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Electrical performance testing tool and method for cable intermediate joint

A technology for cable intermediate joints and electrical performance, which is applied to the components of electrical measuring instruments, measuring devices, and electrical measurements, and can solve problems such as difficult plugging and unplugging of cables and intermediate joints, carbon black falling off, and adhesion, so as to avoid Effects of cleaning and dealing with problems and preventing carbon black from falling

Active Publication Date: 2021-04-30
宁波东致杰电力科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Since the intermediate connector is made of silicone, the material is relatively soft, and the end of the cable needs to be inserted in a long stroke, it is difficult to realize the insertion and removal of the cable and the intermediate connector during the test
In order to solve this problem, the conventional method is to use lubricants such as silicone grease for lubrication, but after the test, it is necessary to manually use solvents such as alcohol to wipe the lubricant residue on the inner wall of the intermediate joint under pressure, which is not only time-consuming and laborious, but also very easy. As a result, the carbon black on the inner electrode falls off due to friction and adheres to the insulating layer outside the cable core, eventually causing the entire intermediate joint to be easily broken down by high voltage

Method used

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  • Electrical performance testing tool and method for cable intermediate joint
  • Electrical performance testing tool and method for cable intermediate joint
  • Electrical performance testing tool and method for cable intermediate joint

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Embodiment 1: as figure 1As shown, it is a tool for testing the electrical performance of a cable intermediate joint disclosed by the present invention, including a test rod 1 and a metal cap 2 . The test rod 1 is made of epoxy resin material, which includes an integrally formed embedded section 12 and a clamping section 11, the inner diameter of the clamping section 11 is greater than the outer diameter of the embedded section 12, so that a positioning step 14 is formed between the two . A via hole 13 is provided through the test rod 1 along its length direction, and a metal tube 4 equal to its depth and hollow inside is arranged in the via hole 13. The metal cap 2 and the metal tube 4 in this embodiment are all made of copper material. become. When in use, the embedded section 12 needs to be inserted into the inside of the intermediate joint 7 to be tested, and the side wall of the clamping section 11 is also surrounded by a mounting flange 112. The process of inse...

Embodiment 2

[0043] Embodiment 2: A method for testing the electrical performance of a cable intermediate joint, comprising the following steps:

[0044] Step 1: The intermediate joint 7 can be placed in two semi-circular rings (not shown in the figure) arranged up and down to hold tightly and fix it, and keep it horizontal, and install the test rod 1 in Example 1 on a relatively slidable Move the two mounting brackets, and use the cylinder to insert the embedded section 12 of the test rod 1 into the two ends of the intermediate joint 7 at the same time. During the insertion process, the air pipe can be used to continuously feed compressed air into the metal pipe 4. Since an airtight space will be temporarily formed inside the intermediate joint 7, the inner cavity will be slightly expanded by compressed air to facilitate the insertion of the embedded section 12, and the inflation will be stopped after the positioning step 14 abuts against the port of the intermediate joint 7;

[0045] Ste...

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Abstract

The invention discloses a tool and method for testing the electrical performance of a cable intermediate joint, which belongs to the field of cable accessories, and includes a test rod. A via hole communicating with both ends of the test rod is opened in the test rod. Metal tubes that are equal and hollow inside; one end of the test rod is detachably mounted with a metal cap, an air gap is formed between the metal cap and the test rod, and the metal tube is connected to the metal cap. The invention has the effect of being able to simulate the working state of the intermediate joint during cable connection, accurately detect whether there is a quality defect in the intermediate joint, and at the same time facilitate the insertion and removal of the intermediate joint, eliminating the need to clean the inner wall of the intermediate joint.

Description

technical field [0001] The invention relates to the technical field of cable accessories, in particular to a tool for testing the electrical performance of a cable intermediate joint. Background technique [0002] In the laying process of power cable transmission lines, due to the limited length of power cables, they need to be connected through the cable intermediate joint. The main function of the cable intermediate joint is to keep the cable sealed, the line unobstructed, and to ensure the insulation level of the cable joint to make it safe and reliable. to run. Therefore, the cable intermediate joint is an important part of the power cable accessories, but it is also a frequent part of the transmission line, and its electrical performance directly affects the safety of the power supply system. [0003] Compared with the cable body, the cable intermediate joint has a multi-layer solid composite dielectric structure, and there are a large number of composite cross-section...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/01G01R1/36G01R1/02
CPCG01R1/02G01R1/36G01R31/013
Inventor 童志勇苗付贵盛黎平
Owner 宁波东致杰电力科技有限公司