Furnace for testing limit of fire resistance of tunnel fire-proof protective material

Abstract

The invention relates to a furnace for testing the limit of fire resistance of a tunnel fire-proof protective material, which is characterized in that when a sample is tested, the sample is covered at the top of a furnace body, and a burning device is placed at the bottom of the sample to be used for heating the sample. The furnace body comprises a furnace lining, short-flame burners, a sample clamping and turning device and a cellular heat absorbing board, wherein the furnace lining in a modular structure is arranged in a furnace shell; the cellular heat absorbing board is arranged at the opening part of the bottom of the furnace shell; the cellular heat absorbing board is connected with a water-cooled multi-tube cooler; the sample clamping and turning device is arranged at one side of the furnace shell; the internal dimension of the furnace lining is matched with the external boundary dimension of the sample; and a plurality of temperature thermocouples and the short-flame burners are sequentially arranged in the furnace lining from top to bottom. The invention has the advantages that (1) the sample is arranged at the top of a furnace chamber and is reasonably heated, thereby reducing the fuel consumption and enabling the transverse temperature of the furnace chamber to be more uniform and stable; (2) the corner-type electric sample clamping and turning device is adopted, thereby relieving the labor intensity of experimenters and ensuring that the experiment operating process is more simple, more convenient and more reliable; and (3) the flue gas emission temperature reaches the specified emission standard.

Description

technical field [0001] The invention relates to the field of building component experiments, in particular to a furnace for testing the fire resistance limit of tunnel fire protection materials. Background technique [0002] In recent years, with the continuous progress of my country's economic construction, people's living standards have been greatly improved, and the construction industry has also developed by leaps and bounds. With the development of science and technology, various types of building structural parts emerge in endlessly. It has the characteristics of high strength, light weight, easy manufacture, fast construction speed, good plasticity and toughness, and is widely used in industrial and civil buildings in our country. However, although the steel in the steel structure building components is not combustible, it is not fire-resistant. When the temperature reaches 250°C, the strength drops rapidly. Under the action of fire and high temperature, the risk of c...

AI Technical Summary

Problems solved by technology

However, although the steel in the steel structure building components is not combustible, it is not fire-resistant. When the temperature reaches 250°C, the strength drops rapidly. Under the action of fire and high temperature, the risk of collapse of steel structure buildings has increased sharply

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