Wood fire spreading process testing device for irradiation environment

Abstract

The invention discloses a wood fire spreading process testing device for an irradiation environment, and relates to the technical field of fire science and building safety. The testing device mainly comprises a wood sample, clamp bottom and top plates, a clamp telescopic frame, a radiation plate, a radiation plate telescopic frame, an ash dropping groove, an electronic balance, a thermocouple, a high-definition camera and the like. The angles and heights of the wood sample and the radiation plate can be freely and flexibly adjusted; an external complex radiant heat flow environment can be created through the radiation plate, so that the mass changes of heating, combustion, residue states and the like, physical images and characteristic temperature field deduction rules of wood samples madeof various materials and in various shapes in a forward or backward fire spreading process under different spatial configuration conditions can be researched; and the device can be used for deeply exploring the wood fire spreading process under the combined action of the external irradiation environment and the spatial configuration, and also can be expected to provide a test means for the fire resistance and combustion performance testing of building wood materials and the establishment of classification standards.

Description

technical field [0001] The invention relates to the technical field of fire science and building safety, in particular to a device for testing wood fire spread process under irradiation environment. Background technique [0002] There are a large number of wooden structures in our country, many of which are historical buildings or even ancient buildings. However, due to the flammability or flammability of wood itself, once a fire occurs accidentally, it is very likely to cause significant personal and property losses. In fact, from a global perspective, major fires related to wooden building components continue, such as the fire in the ancient city of Shangri-La in Yunnan in 2014, the fire in the National Museum of Brazil in Brazil in 2018, and the Paris fire in France in 2019. The Notre Dame fire, etc., are all related to the fire and combustion of wooden building components. Considering the political and cultural influences involved in such incidents, their fire hazards ...

AI Technical Summary

Problems solved by technology

As for the test device for wood fire combustion, previous scholars have done some research. For example, Ji Jie et al. in 2010 "Journal of Engineering Thermophysics" No. 2 pp. 351-354 "Study of fire spread characteristics of wood surface under different widths and angles The article "Experimental Research" mentions a device for studying the fire spread of small-sized wood boards under different inclination angles, but this device has certain limitations: firstly, the fixing parts of the boards are too small, in order to prevent the wood's gravity moment from being too large, An additional bracket needs to be installed in the middle of the wood to maintain the spatial position of the plank, which will affect the fire spread process to a certain extent; secondly, the impact of falling ash during burning is not considered; thirdly, other factors such as environmental radiation are not considered the role of

Therefore, the existing test devices or methods have limited the research on the fire dynamics of wood materials, and more effective related devices need to be explored. This invention is proposed based on the above background

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