Method for testing bending fatigue resistance of 500kV windage yaw prevention jumper insulator

A fatigue test, insulator technology, applied in the direction of using a stable bending force to test the strength of materials, the test of mechanical parts, the test of machine/structural parts, etc., can solve the test of bending fatigue resistance of 500kV windproof bias jumper insulators methods and other issues to achieve the effect of ensuring stability, simple test process and improving accuracy

Pending Publication Date: 2020-04-10
ZHEJIANG HUADIAN EQUIP TESTING INST +1
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AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a 500kV wind deflection jumper insulator anti-bending fatigue test method to solve the existing technical problem that there is no bending fatigue resistance test method for 500kV wind deflection jumper insulators and thus lead to certain risks

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  • Method for testing bending fatigue resistance of 500kV windage yaw prevention jumper insulator
  • Method for testing bending fatigue resistance of 500kV windage yaw prevention jumper insulator

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Embodiment Construction

[0032] A 500kV anti-wind deflection jumper insulator anti-bending fatigue test method, the 500kV wind deflection jumper insulator includes a core body and core rods arranged at both ends of the core body, and also includes a device for installing the wind deflection jumper insulator, said The device comprises a frame 1 and a support frame 4, the frame 1 is provided with a hoisting mechanism 5, and the hoisting mechanism 5 is provided with a tension sensor 6, and the method includes the following steps in sequence:

[0033] Step 1: Fix one end of the 500kV windproof jumper insulator to the frame, then apply a rated bending load to the other end of the 500kV windproof jumper insulator, keep it for 1min, and then test the bending deflection of the 500kV windproof jumper insulator value y 1 , the rated bending load is 2.5kN;

[0034] Step 2: Install and fix the 500kV wind deflection jumper insulator after the test in step 1 on the lifting mechanism, and carry out the swing fatigu...

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Abstract

The invention relates to a method for testing bending fatigue resistance of a 500kV windage yaw prevention jumper insulator. The 500kV windage yaw prevention jumper insulator comprises a core body anda core rod, and also comprises a frame and a supporting frame. A hoisting mechanism is arranged on the rack. The method sequentially comprises the following steps: step 1, testing a bending deflection value y1; step 2, detecting whether a visible crack exists at a connection part of a core rod and a core body through a swing fatigue test; and step 3, testing a bending deflection value y2. The method has the advantages that the amplitude of the swing fatigue test in the step 2 is set through the bending deflection value y1, the safety performance of the swing fatigue test can be improved, theinfluence on the 500kV windage yaw prevention jumper insulator due to overlarge amplitude is prevented, and the reliability of the swing fatigue test is improved. By comparing the bending deflection value y2 with the bending deflection value y1 and judging whether the 500kV windage yaw prevention jumper insulator is a qualified product or not according to the ratio of the bending deflection valuey2 to the bending deflection value y1, detection personnel can quickly and accurately obtain a test result, and the test accuracy is improved.

Description

technical field [0001] The invention relates to a bending fatigue resistance test method of a 500kV wind deflection jumper insulator. Background technique [0002] In recent years, under the influence of strong winds, the drainage jumpers on 500kV transmission lines in many areas of the country have caused flashovers and tripping accidents. harm. According to statistics, in 2018, there were more than 100 wind deflection trips on the 500kV and above lines under the jurisdiction of the State Grid Corporation, covering Jiangsu, Zhejiang, Anhui, Hubei, Henan, Shandong, Shanxi, Beijing, Hebei, Northeast and other places. The wind deflection discharge has a wide range, many times, and great impact, especially in the typhoon-prone areas in the coastal areas. Different from lightning flashover and operation shock flashover, most of the wind deflection flashover occurs under the working voltage, and generally cannot be successfully reclosed, which leads to the outage of the line an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/20G01N3/04G01M13/00
CPCG01M13/00G01N3/04G01N3/20
Inventor 吴芳芳马恒李周选韦一力高义波杨丽莉张书南
Owner ZHEJIANG HUADIAN EQUIP TESTING INST
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