Cable crimping point and crimping fitting temperature rise experiment method

An experimental method and technology of crimping points, applied in the direction of measuring electricity, measuring electrical variables, measuring devices, etc., can solve problems such as low reliability

Inactive Publication Date: 2017-08-01
CRRC LUOYANG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the above-mentioned technical problems, the present invention provides a temperature rise test method for cable crimping points and crimping fittings. The test method of the present invention is in an indoor airtight, airtight and light-proof environment, and the ambient temperature should be 15°C. Under the condition of ~30°C; use the same crimping tool, the same crimping method, select the sample length as 1m, make 3 samples from the same pressing film of the same crimping tool, and make reliable connection with the specified torque , so that the temperature rise test is carried out under the same conditions. At this time, the length of the connected sample will not affect the judgment of the heating stability; then a large current generator can be used to conduct temperature rise for cable samples and connecting fittings of different specifications. In the test, while ensuring the reliability of the measurement results, in order to take into account the test efficiency and testing cost, it is determined that the preheating time is 90 minutes, and the heating stabilization time is generally 60 minutes. It is measured once every 15 minutes and measured three times in a row. The change value of the two adjacent measurement data If it does not exceed 1°C, it is determined that the heating is stable; this test method for temperature rise of cable samples and connecting hardware samples can solve the problem of low reliability caused by visually inspecting the physical defects of cable crimping points and connecting fittings

Method used

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  • Cable crimping point and crimping fitting temperature rise experiment method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Embodiment 1, select sample length as 1m, rated section as 25 mm2

[0042] Step 1. Selection of the experimental environment: The temperature rise experiment of the cable crimping point and the crimping fitting 5 is carried out in an indoor environment that is not ventilated, airtight, and protected from light, and the indoor ambient temperature is 15°C;

[0043] Step 2. Selection of test equipment: the same test equipment is used for the lifting experiment of the cable crimping point and the crimping fitting 5, a large current generator, which provides a stable output current of 80A required for the experiment. Use a meter, a data acquisition card, A set of thermocouples constitutes a reliable measurement system, and a torque wrench to ensure reliable terminal connection, the torque setting value is 10 Nm;

[0044] Step 3. Preparation of experimental crimped cable samples: crimp the crimped cable 4 with the crimping fitting 5 of the same specification. Both ends of the...

Embodiment 2

[0053] Embodiment 2, select sample length as 1m, rated section as 95 mm2

[0054] Step 1. Selection of the experimental environment: the temperature rise experiment of the cable crimping point and the crimping fitting 5 is carried out in a non-ventilated, airtight, and light-proof indoor environment, and the indoor ambient temperature is controlled at 25°C;

[0055] Step 2. Selection of test equipment: the same test equipment is used for the lifting experiment of the cable crimping point and the crimping fitting 5, a large current generator, which provides a stable output current of 260A required for the experiment; a multimeter, a data acquisition card, a thermoelectric Even a set to form a reliable measurement system, and a torque wrench to ensure reliable terminal connection, the torque setting value is 20Nm;

[0056] Step 3. Preparation of experimental crimped cable samples: crimp the crimped cable 4 with the crimping fitting 5 of the same specification. Both ends of the c...

Embodiment 3

[0065] Embodiment 3, select sample length as 1m, rated section as 240 mm2

[0066] Step 1. Selection of the experimental environment: The temperature rise experiment of the cable crimping point and the crimping fitting 5 is carried out in a non-ventilated, airtight, and light-proof indoor environment, and the indoor ambient temperature is controlled at 30°C;

[0067] Step 2. Selection of test equipment: The same experimental equipment is used for the test of the cable crimping point and the crimping fitting 5, a large current generator, which provides a stable output current of 590A for the experiment, a multimeter, a data acquisition card, a thermoelectric Even a set to form a reliable measurement system, and a torque wrench to ensure reliable terminal connection, the torque setting value is 35Nm;

[0068] Step 3. Preparation of experimental crimped cable samples: crimp the crimped cable 4 with the crimping fitting 5 of the same specification. Both ends of the cable must be cri...

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PUM

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Abstract

The invention discloses a cable crimping point and crimping fitting temperature rise experiment method comprising the following steps that step one, the experiment environment is selected; step two, test equipment is selected; step three, an experiment crimping cable sample is prepared; step four, a crimping cable test point is selected; step five, a cable temperature rise experiment measurement component is selected; step six, corresponding temperature rise test current is selected according to the cables of different specifications; step seven, the cable crimping point and connecting fitting temperature rise experiment data are analyzed; step eight, temperature rise of the measurement point is calculated; and step nine, the cable crimping point and connecting fitting temperature rise experiment result is judged. According to the cable crimping point and crimping fitting temperature rise experiment method, the accuracy and the reliability of the temperature rise experiment can be enhanced, the experiment material and time cost can be reduced and the locomotive maintenance quality and safe operation can be guaranteed.

Description

technical field [0001] The invention belongs to the technical field of cable crimping for electric locomotives, and in particular relates to a temperature rise test method for cable crimping points and crimping fittings. Background technique [0002] There are tens of thousands of cables laid on electric locomotives. If the quality of the cable crimping points and connecting fittings cannot be guaranteed during the crimping process of so many cables, it is easy to cause defects in the cables due to crimping points during the operation of the locomotive. , causing the cables to heat up, even causing fire accidents, and causing great obstacles to the safe operation of electric locomotives. [0003] The temperature rise experiment of the cable crimping point and the connecting fittings is an experiment to test the quality of the cable crimping point and the crimping of the cable and connecting fittings. Through the temperature rise experiment of the cable crimping point and the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/00
CPCG01R31/00
Inventor 张丽张明生孙喜玲
Owner CRRC LUOYANG CO LTD
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