A material combustion experimental device simulating a low-pressure environment

Abstract

The invention discloses a material combustion experiment device capable of simulating a low-pressure combustion environment. The material combustion experiment device comprises a sample heating device and a pressure control device. The pressure control device can be used for regulating and controlling different atmospheric pressure environments so that combustion products of materials in different pressure environments are researched; and the device fills the technical blank of related research field, and has important meanings of reducing and controlling highland and high-altitude fire disaster accidents. The influences on changes of environment pressure in a sample combustion process are reduced through a buffering tank so that inner pressure of a quartz tube can keep basically unchanged; and the combustion products in the quartz tube can be sufficiently discharged through an exhausting fan so that gas in the buffering tank and gas in the quartz tube are sufficiently mixed, the concentration of the gases keeps consistent, and furthermore, the testing accuracy is guaranteed. A second sealing door and a thin film are arranged so that the gas pressure in the buffering tank keeps unchanged in a sample collection process, and furthermore, the combustion products can be relatively conveniently and accurately collected and tested.

Description

technical field [0001] The invention relates to a material combustion experimental device, in particular to an experimental device for testing the combustion performance of materials under different pressures. Background technique [0002] With the development of polymer materials science and technology, new polymers and their composite materials are more and more widely used in construction, electrical, transportation, national defense and aerospace and other fields. However, most polymer materials are flammable materials, which are easy to be ignited in the air and cause a fire, which not only causes huge material and property losses, but also produces toxic smoke that endangers people's lives and harms the ecological environment. Serious impact. The toxicity hazard of fire smoke has become one of the major issues that contemporary firefighting urgently needs to solve. [0003] The release of fire smoke changes with the change of the fire scene. Changes in ambient temper...

AI Technical Summary

Problems solved by technology

[0004] From the 1970s to the 1990s, the National Institute of Standards and Technology (NIST), the British Ministry of Defense and the German Standards Institute developed many devices for testing the combustion performance of materials, especially the toxicity of fire smoke. Small-scale test devices for testing, such as NBS smoke density chamber, cone calorimeter, DIN 53436 tube furnace, etc. The above devices can control the temperature, oxygen concentration and ventilation conditions in the material combustion environment, but The atmospheric pressure, an important environmental factor, cannot be regulated. Therefore, the combustion process of materials in low-pressure scenarios cannot be simulated, so that there are few researches on fire prevention and control in special environments such as plateaus and high altitudes.

Images