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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: 2012-08-15
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
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  • Claims
  • Application Information

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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 implementation mode 1: The test method for the optimal crosslinking agent diffusion time in the production process of high-voltage cable materials in this embodiment is carried out according to the following steps:

[0036] 1. In the process of producing high-voltage cable materials by the post-absorption method, the granular purification material obtained by melting and blending raw materials, filtering, granulating, and drying and the granular material composed of liquid crosslinking agent are physically mixed and stored at a constant temperature. , after storage, take out 30-50 grams of granular material every 0.5 hours as a sample, and record the sampling time as i;

[0037] 2. Cut out a cube with a side length of 0.4 to 0.6 mm at the center of the granular material sample obtained by each sampling, and record 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 1 gram of absolute ethanol into a...

specific Embodiment approach 2

[0057] Embodiment 2: This embodiment differs from Embodiment 1 in that in Step 2, a cube with a side length of 0.5 mm is cut from the center of the granular material obtained in each sampling. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0058] Specific implementation mode three: the difference between this implementation mode and specific implementation mode one or two is that in step three, the m obtained in step two is 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 a constant temperature water tank at 65°C, and let it stand for 6-7 hours. Others are the same as in 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 test method for cross-linking agent diffusion time in the production process of high-voltage cable materials. Background technique [0002] With the progress of society and the rapid development of economy, the demand for electric energy has grown strongly worldwide, and the use of power cables as a carrier of electric energy transportation has increased sharply in recent years. XLPE 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 consumption is increasing year by year. Especially in the field of high-voltage cables, 110kV and above high-voltage XLPE cables are mainly insulated with XLPE, and 500kV ultra-high voltage XLPE insulated cables are also used in lines. This situation has also promoted the rapid increase in do...

Claims

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Application Information

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