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A fire test chamber with variable low pressure and variable oxygen concentration

A technology of oxygen concentration and test chamber, which is applied in the experimental field of combustion and fire science, can solve problems such as difficult to carry out fire experiment research, and achieve the effect of simple structure, convenient operation and good airtightness

Inactive Publication Date: 2016-03-02
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the limitation of design size, low-pressure range and gas adjustment of general low-pressure test equipment, it is difficult to carry out fire-related experimental research

Method used

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  • A fire test chamber with variable low pressure and variable oxygen concentration
  • A fire test chamber with variable low pressure and variable oxygen concentration
  • A fire test chamber with variable low pressure and variable oxygen concentration

Examples

Experimental program
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Effect test

Embodiment

[0019] see figure 1 , a fire test box with variable low pressure and variable oxygen concentration includes a test box 1, the test box 1 is a rectangular structure, the space in the box is 3.0m long, 2.0m wide, and 2.0m high; the inside of the test box is made of mesh The reinforcing rib increases the pressure bearing capacity of the shell, and the pressure bearing range is 26.4-101.3kPa, that is, the altitude range that can be simulated is 0-10,000m; a pressure sensor 10 is installed in the box, and the right side wall passes through a copper suction pipeline 16 It is connected to the vacuum pump unit and connected to the air supply system through the air intake pipeline 13, and the pressure value in the box can be selected to be automatically set or manually adjusted on the console.

[0020] The front of the box 1 is equipped with an observation window 7, which is a vacuum double-layer mirror structure of tempered silicon glass, and the light transmission size is 0.3m wide a...

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Abstract

The invention provides a fire test box with variable low air pressure and a variable oxygen concentration and belongs to the field of tests in combustion science and fire science. The fire test box is an environmental simulation device used for controlling the low air pressure and the oxygen concentration value in the fire test box during a fire test. The fire test box comprises a test box body (1), wherein the test box body (1) is of a rectangular structure, the left side of the test box body (1) is provided with an inlet / outlet (2), the inlet / outlet (2) is sealed through a spirally pressing type high-strength door (27), two low-voltage-resistant illuminating lamps (3) and a video camera (11) are installed on the inner upper portion of the test box body (1), each low-voltage-resistant illuminating lamp (3) is provided with an anti-explosion cover, the front surface of the test box body (1) is provided with an observation window (7), a spray nozzle (8) and a nozzle base are arranged over the inside of the box body (1), a fire-extinguishing pipeline (9) is laid, and a flow guide groove (20), a liquid collection hole (21) and a recovery pipeline (14) are reserved in the ground. The fire test box can simulate coupling environments at low air pressure of different altitudes with different oxygen concentrations and is used for a study on the combustion mechanism, fire detection and a fire-extinguishing test in a special low-pressure and low-oxygen-concentration / oxygen-enriched environment.

Description

technical field [0001] The invention belongs to the experimental field of combustion and fire science, and specifically relates to a fire test box with variable low pressure and variable oxygen concentration, which is an environment simulation device for controlling low pressure and oxygen concentration in the test box during fire experiments. Background technique [0002] The fire prevention and control under the special environment of low pressure and low oxygen is the focus of research in the fields of combustion and fire science in recent years. Difficulties, its fire safety has been highly valued because it involves major political and economic issues. In order to reveal the influence of low pressure and low oxygen environment on fire combustion behavior, detection characteristic parameters and fire extinguishing effect, it is necessary to carry out experiments in a test chamber that can continuously change pressure and oxygen concentration from the perspective of combu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09B25/00
Inventor 周德闯汪箭丁超王浩波邓志华
Owner UNIV OF SCI & TECH OF CHINA
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