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Electric furnace for expansive fireproof coating field detection and detecting method

A technology for fire-resistant coatings and on-site detection, which is applied in the direction of material thermal expansion coefficient, measuring device, specific gravity measurement, etc. It can solve the problems of making evaluations, requiring high professional experience of evaluation personnel, and difficult to make accurate distinctions, so as to reduce professional experience. Requirements, fast evaluation, and the effect of being easy to promote and use

Active Publication Date: 2007-06-06
BEIJING AVIATION MATERIAL INST NO 1 GRP CORP CHINA AVIATION IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The disadvantage of the above-mentioned method is: the fire resistance limit method of the horizontal furnace of the full-size steel beam type workpiece specified in the ISO834 and GB9978 standards needs to prepare at least one 36b or 40b standard I-beam with a length of 5 to 6 meters each time.
Its disadvantages are: the sample is installed horizontally above the furnace body, and the fire surface and back fire surface of the sample are both 64cm 2
Therefore, in the test, the final back temperature of the electric furnace was much lower than the final back temperature of the national type inspection and the test of the medium-sized refractory limit beam furnace. Difficult to promote and use
It is also difficult to make a precise distinction between intumescent coatings with similar fire performance

Method used

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  • Electric furnace for expansive fireproof coating field detection and detecting method
  • Electric furnace for expansive fireproof coating field detection and detecting method
  • Electric furnace for expansive fireproof coating field detection and detecting method

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0048] (1) The length A=230mm of body of furnace 6 inner cavity, width B=230mm;

[0049] (2) The width of the supporting brick 4 is 90mm, and the thickness is 65mm. Bracket 4 is placed on a heat-resistant metal bracket fixed on the furnace wall.

[0050] (3) The cooling chip 1 is made of ordinary carbon steel with an anti-oxidation layer, its length L=225mm, its height H=180mm, and its thickness t=8mm. The depth of the back temperature thermocouple installation groove 9 is 135mm.

[0051] (4) The furnace cover 7 is composed of two rectangular cover plates with a thickness of 230mm×115mm and a thickness of 65mm.

example 2

[0053] (1) The length A=150mm of furnace body 6 inner cavity, width B=150mm;

[0054] (2) The width of the supporting brick 4 is 60mm, and the thickness is 35mm. The length is 200mm, and both ends are inserted into the square holes in the side walls of the furnace.

[0055] (3) The cooling chip 1 is made of a black heat-resistant alloy with good oxidation resistance, its length L=147mm, its height H=120mm, and its thickness t=5mm. The depth of the back temperature thermocouple installation groove 9 is 90mm.

[0056] (4) The furnace cover 7 is composed of two rectangular cover plates with a thickness of 150mm×72mm and a thickness of 65mm.

example 3

[0058] (1) The length A=82mm of body of furnace 6 inner cavity, width B=82mm;

[0059] (2) The width of the supporting brick 4 is 20mm, and the thickness is 20mm. Bracket 4 is placed on a heat-resistant metal bracket fixed on the furnace wall.

[0060] (3) The cooling chip 1 is made of ordinary carbon steel with an anti-oxidation layer, its length L=80mm, its height H=80mm, and its thickness t=3mm. The depth of the back temperature thermocouple installation groove 9 is 60mm.

[0061] (4) The furnace cover 7 is composed of two rectangular cover plates with a size of 115×55mm and a thickness of 65mm.

[0062] The embodiment of test method of the present invention is as follows:

[0063] example 1,

[0064] Make test sample; Sample 2 length A=225mm, its height B=90mm, its thickness p=1.8mm, net weight 290g, 290g before coating fireproof coating, weight 373g, 375g after coating fireproof coating.

[0065] Measure the thickness of the coating; use a non-destructive testing thi...

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Abstract

This invention disclosed an improvement technique and testing method used for industrial electric cooker. The improved cooker consists of the main body, cap, heater and thermocouple. There was a fire resisting brick and a radiating chip in the hearth; the sample was stuck below the chip and above the brick; the upper side of the chip extends to the two cove boards. This invention meets the national standard and works precisely and efficiently so that it is not far from practical application.

Description

technical field [0001] The invention belongs to the detection technology of fireproof coatings for steel structures, and relates to the improvement of an electric furnace and a detection method for on-site detection of expansion fireproof coatings. Background technique [0002] The fire resistance test of intumescent steel structure fireproof coating is mainly in accordance with the fire resistance limit method of horizontal furnace for full-size steel beam workpieces stipulated in ISO834 and GB9978 standards. In order to detect the quality of intumescent fire retardant coatings used on the project site, there are four methods as follows: [0003] 1. The "National Fireproof Building Material Inspection Center" adopts the method of scraping the coating powder from the engineering workpiece and placing it in the crucible with a box-type electric furnace to measure its expansion performance; [0004] 2. Beijing has promulgated the local standard DBJ01-616-2004. After scraping ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N5/04G01N25/16G01N9/36G01N37/00
Inventor 熊家锦裘陆道师华李风孔小弟马道贞
Owner BEIJING AVIATION MATERIAL INST NO 1 GRP CORP CHINA AVIATION IND
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