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Obtaining method of failure criterion and performance evaluation method of cable fireproof coating after operation

A technology of fire retardant coatings and failure criteria, applied in the direction of thermal expansion coefficient of materials, etc., can solve the problems of lack of fire retardant coatings, lack of test parameter setting basis for simulated aging, and inability to evaluate fire resistance of fire retardant coatings.

Active Publication Date: 2021-04-27
STATE GRID JIANGSU ELECTRIC POWER CO ELECTRIC POWER RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in the prior art, it is impossible to evaluate whether the fire protection ability fails after long-term operation of the fire retardant coating
The main problems are: 1) lack of criteria for assessing whether the fire retardant coating fails after long-term operation; 2) lack of test parameter setting basis for simulated aging; Evaluation of fire prevention requirements after operation; 4) The lines that have been put into operation have been painted for a long time, so it is not easy to take a large number of samples. The method before putting into operation in the prior art is not suitable for evaluation and detection after putting into operation

Method used

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  • Obtaining method of failure criterion and performance evaluation method of cable fireproof coating after operation
  • Obtaining method of failure criterion and performance evaluation method of cable fireproof coating after operation
  • Obtaining method of failure criterion and performance evaluation method of cable fireproof coating after operation

Examples

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Embodiment 1

[0056] Example 1: A performance evaluation and detection method for cable fireproof coating after operation

[0057] Such as figure 1 As shown, the present invention provides a method for evaluating and detecting the performance of the cable fireproof coating after operation. The purpose of the method is to obtain the reference value of the failure criterion after the operation of the cable fireproof coating, and the aging simulation time, that is, the reference value of the failure simulation time of the fireproof coating. The method comprises the steps of:

[0058] Step 1, paint the cable fireproof coating on the cable to prepare multiple groups of cable samples, each group of cable samples contains multiple cable samples; one group of cable samples is the unaged group, and the remaining groups of cable samples are aged Mock group.

[0059] In step 2, the aging simulation test is carried out on all the cable samples of the aging simulation group, and a group of cable sampl...

Embodiment 2

[0084] Example 2: A performance evaluation and detection method of cable fireproof coating after operation

[0085] Such as figure 2 As shown, the present invention provides a method for evaluating and detecting the performance of cable fireproof coating after operation. , to simulate the aging of the proposed cable fireproof coating before operation, simulate the state after operation, and evaluate the performance of the cable fireproof coating.

[0086] Step 1. Prepare multiple groups of cable samples with unpainted cable fireproof coatings, that is, to paint the coating on the cables. Each group of cable samples contains multiple cable samples, one of which is the unaged group, and the remaining groups are aged. Mock group.

[0087] In step 2, all the aging simulation groups are subjected to the aging simulation test, and a group of cable samples are successively taken out from the aging simulation test according to the set time nodes, wherein the time nodes include the ...

Embodiment 3

[0093] Example 3: A performance evaluation and detection method of cable fireproof coating after operation

[0094] Such as image 3 As shown, the present invention provides a method for evaluating and detecting the performance of cable fireproof coatings after operation. Evaluation detection. Include the following steps:

[0095] Step 1. Collect the paint on the cables that have been coated with the intumescent cable fireproof coating after operation, and record it as the operation group. Prepare a group of cable samples with the same cable fireproof coating that has not been painted, that is, the coating is cured and dried, and the coating is collected. Powder, recorded as the control group. Specifically include:

[0096] When sampling, take the coating to the surface of the cable, and at least three cables should be selected to collect the coating; the average expansion ratio ratio of the coating collected from multiple cable samples is used as the expansion ratio ratio o...

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Abstract

The invention provides a method for evaluating and detecting the performance of a cable fireproof structure after operation, which includes the following steps: Step 1, collect the paint on the cable that has been coated with an intumescent cable fireproof paint after operation, record it as an operation group, and collect the cable sample The unaged paint is recorded as the control group; step 2, the state is adjusted in the state adjustment room, and then the paint sample is dried and cooled to room temperature; the paint sample obtained by weighing the set weight is placed in the muffle furnace , take out and cool after setting the time; step 3, compress the paint sample obtained in step 2 into powder; measure the volume of the paint sample obtained, calculate the expansion ratio of the paint in the operation group and the control group, and then calculate the paint in the operation group and the control group Expansion magnification ratio; step 4, comparing the expansion magnification ratio with the failure criterion of the cable fireproof coating, and judging whether the cable fireproof coating has failed at the time of sampling.

Description

technical field [0001] The invention belongs to the technical field of cable fire prevention, and more specifically relates to a performance evaluation and detection method and system of a cable fireproof coating after operation. Background technique [0002] Cable fireproof coatings are generally composed of tertiary acrylic emulsion water-based materials with various fireproof flame retardants, plasticizers, etc. When the coating coating is exposed to fire, it can form a uniform and dense sponge-like foam insulation layer, which can effectively suppress and block the flame. Spread and spread, protect wires and cables. For example, prior art document 1 (Sichuan Fire Research Institute of the Ministry of Public Security. "A flame-retardant coating for cables." CN109370333A.2019-02-22.) discloses a flame-retardant coating for cables, the raw material of which is It includes the following components in parts by weight: 5-25 parts of emulsion, 30-45 parts of ammonium polyphosp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N25/16
CPCG01N25/16
Inventor 李陈莹陈杰陶风波刘洋胡丽斌谭笑曹京荥张伟刘建军王永强袁栋
Owner STATE GRID JIANGSU ELECTRIC POWER CO ELECTRIC POWER RES INST