Variable density and gas flow rate smoldering characteristic experiment device and testing method

Abstract

The invention discloses a variable density and gas flow rate smoldering characteristic experiment device and a testing method and belongs to the technical field of detection. The experiment device comprises a gas cylinder group, a control and analysis platform and a smoldering experiment table that are sequentially communicated electrically, wherein the smoldering experiment table comprises a precise density adjustment and control device, a precise angle adjustment device, a controllable auxiliary heating device, an embedded thermocouple and a heat flow meter; and the control and analysis platform comprises a gas flow rate control system, a displacement adjustment and control panel, an angle adjustment and control panel, a power adjustment and control panel, a temperature data acquisitiondevice, a heat flow data acquisition device, a gas toxicity analysis device, a data storage device, an emergency stop button, a power supply button and a measurement button. The device and the methodare particularly used for determining a smoldering characteristic parameter of a porous medium material under the conditions of different densities and different gas flow rates, provide basic data fordetermining a condition of smoldering converted to open fire combustion and are mainly used for fire scientific researches and firefighting instruction.

Description

technical field [0001] The invention is used to measure the smoldering combustion characteristic parameters of porous media materials (such as cotton and sponge) under different densities and different gas flow rates, and provides basic data for determining the conditions for smoldering to turn into open flame combustion, and is mainly used for fire science research It belongs to the field of detection technology, and specifically refers to a smoldering characteristic experimental device and test method with variable density and gas flow rate. Background technique [0002] Smoldering is a form of solid combustion, which mainly occurs in porous media materials, such as cotton and sponge. Due to its strong concealment and slow development, it is not easy to be discovered; but when it turns into flaming combustion , It is very easy to cause a large-scale fire, causing serious economic losses and casualties to people. For example, in 2005, a villager in Congjiang County, Guizho...

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Problems solved by technology

[0003] The experimental device can only simply observe the smoldering process of the porous media material, and cannot monitor the internal temperature change, heat flow distribution and smoke toxicity of the sample material during the smoldering process in real time; and the experimental device can only be used in a specific environment. Carrying out the smoldering experiment cannot control the density of the sample material, let alone the flow velocity of the intake gas; although the existing experimental device can control the temperature of the heating device, it cannot control the heating area of ​​the heating device, making the application of the experimental instrument Therefore, it is urgent to develop a smoldering characteristic measurement device that can effectively control the material density and gas flow rate.

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