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Test method of optimal cross-linking agent diffusion time in production process of high-voltage cable material

A high-voltage cable and production process technology, which is applied in the field of cross-linking agent diffusion time testing, can solve the problem that the optimal cross-linking agent diffusion time is not easy to determine, and achieve the effects of shortening test time and cost, and high data accuracy

Inactive Publication Date: 2015-05-13
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The present invention aims to solve the problem that the optimal crosslinking agent diffusion time is not easy to determine in the production process of crosslinkable high voltage cable materials, and provides a method for determining the optimal crosslinking agent diffusion time in the production of high voltage cable materials

Method used

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  • Test method of optimal cross-linking agent diffusion time in production process of high-voltage cable material
  • Test method of optimal cross-linking agent diffusion time in production process of high-voltage cable material
  • Test method of optimal cross-linking agent diffusion time in production process of high-voltage cable material

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specific Embodiment approach 1

[0035] Specific embodiment 1: The test method of the best crosslinking agent diffusion time in the production process of the high-voltage cable material of this embodiment is carried out according to the following steps:

[0036] 1. In the process of using the post-absorption method to produce high-voltage cable materials, the granular purification material obtained by raw material melt blending, filtration, granulation, and drying and the granular material composed of the liquid crosslinking agent are physically mixed and stored at a constant temperature. , After storage, take out 30-50 grams of pellets as samples every 0.5h, and record the sampling time as i;

[0037] 2. Cut a cube with a side length of 0.4~0.6mm at the center of the pellet sample obtained for each sampling, and mark the mass of the cube as m 1 Grams, m 1 =0.2~1.0g;

[0038] 3. Cut m from step 2 1 Grams of material and m 2 Put one gram of absolute ethanol into the test tube and seal it, then put the test tube into ...

specific Embodiment approach 2

[0057] Specific embodiment two: this embodiment is different from specific embodiment one in that in step two, a cube with a side length of 0.5 mm is cut from the exact center of the pellet obtained during each sampling. Others are the same as the first embodiment.

specific Embodiment approach 3

[0058] Specific embodiment three: This embodiment is different from specific embodiment one or two in that: in step three, m cut from step two 1 Grams of material and m 2 One gram of absolute ethanol is put into the test tube and sealed, and then the test tube is placed in a constant temperature water tank at 65° C. and left to stand for 6-7 hours. Others are the same as the first or second embodiment.

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Abstract

The invention discloses a test method of optimal cross-linking agent diffusion time in the production process of a high-voltage cable material, relates to a test method of a cross-linking agent diffusion time in the production process of the high-voltage cable material. The method can be used for solving the problem that the optimal cross-linking agent diffusion time in the production process of the cross-linkable high-voltage cable material is hard to determine. The method comprises the following steps: in the production process, sampling 1 g of m from particles at intervals of 0.5 hour, placing the material in absolute ethyl alcohol to stand at a constant temperature, filtering, and then collecting the filtrate; adding a chloroform solution of ethyl p-hydroxybenzoate in a nuclear magnetic tube, volatilizing the chloroform, adding the filtrate in the nuclear magnetic tube, and adding a deuterated chloroform, uniformly mixing, testing a H spectrum of the to-be-tested solution in the test tube in the step sixth, computing the concentration difference of the cross-linking agent at the particle centre at two adjacent sampling times, and determining the optimal cross-linking agent diffusion time. The method provided by the invention has the advantages of high tested data precision, small experimental amount, shortened test time and low cost. The method is used for testing the optimal cross-linking agent diffusion time in the production process of the high-voltage cable material.

Description

Technical field [0001] The invention relates to a method for testing the diffusion time of a crosslinking agent in the production process of high-voltage cable materials. Background technique [0002] With social progress and rapid economic development, the demand for electrical energy worldwide has grown strongly, and the use of power cables as the carrier of electrical energy transmission has increased rapidly in recent years. Cross-linked polyethylene insulated cables have the advantages of good dielectric properties, large transmission capacity, convenient installation, operation and maintenance, etc. In recent years, the trend of replacing other types of cables has become more and more obvious, and the amount of use has been increasing year by year. Especially in the field of high-voltage cables, high-voltage cross-linked cables with voltage levels of 110kV and above are mainly insulated with cross-linked polyethylene, and 500kV ultra-high-voltage cross-linked polyethylene i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N24/08
Inventor 韩宝忠赵洪李长明
Owner HARBIN UNIV OF SCI & TECH