Novel device for testing hot smoke

Abstract

The invention relates to a novel thermal smoke testing device which is used for measuring and testing performance of a building smoke control system by using a simulating fire source and a smoke formation device under the condition of fire. The novel thermal smoke testing device comprises a combustor and a smoke formation mechanism; wherein, an air inlet pipe is arranged at the bottom in a frame of the combustor, and more than two jet tubes are evenly distributed above the air inlet pipe; the two jet tubes are communicated with the air inlet pipe and uniformly distributed with nozzles, and a strip-shaped housing plate is covered and arranged above each of the jet tubes; the housing plates are evenly provided with premixed nozzles, and the protruding end of the air inlet pipe is communicated with a fuel gas pipeline which is sequentially connected with a unit valve, a flowmeter, a master valve and the like in series, and a pressure gauge is connected between the flowmeter and the master valve in parallel; the smoke formation mechanism includes a smoke formation tray and a hood baffle. The novel thermal smoke testing device takes liquefied petroleum gas as fuel, thus improving the safety of the simulating fire source, strengthening the control to the simulating fire source, and enhancing the stability and the heat resistance of the simulating smoke source. Therefore, the novel thermal smoke testing device has adjustable and continuous fire source power, and is safe, clean and portable.

Description

technical field [0001] The invention relates to a hot smoke testing device for testing the performance of a building smoke control system in a fire situation by using a simulated fire source and a smoke generating device. Background technique [0002] Once a fire breaks out in a building, it will not only cause a large amount of property loss, but also pose a serious threat to personnel safety. According to statistics, about 75-85% of the deaths in building fires are caused by smoke suffocation. Therefore, the smoke control system of a building plays an important role in a fire, and its performance evaluation is very necessary. [0003] Existing hot smoke test devices for performance evaluation of building fire smoke control systems are mainly based on the Australian hot smoke test standard AS 4391-1999. Among them, the simulated fire source uses methanol as fuel, which burns in a steel fuel tray, and a water bath is outsourced to ensure the stability of combustion. In act...

AI Technical Summary

Problems solved by technology

[0004] (1) Existing devices use methanol as fuel. Because methanol has certain toxicity, if it enters the mouth or eyes by mistake during use, it will cause serious injury to the experimenter, and the formaldehyde and formic acid produced by combustion are also harmful to health; meanwhile, methanol During the application of the pool fire, accidents such as leakage and overturning may also occur, causing the fire to spread and causing accidents and disasters;

[0005](2) The power of a methanol pool fire is mainly determined by its area. A pool fire with a certain area corresponds to a certain fire source power, and the fire source power cannot be continuously adjusted

If you need to use multiple fire sources with different powers, you need to make a corresponding number of methanol pool fire plates with different areas, which is inconvenient to use and carry; the combustion process is difficult to control, and if the amount of fuel added is small, it may be difficult to ensure sufficient Burning time, if too much is added, it cannot be extinguished halfway when the test purpose has been achieved

[0006](3) In the Australian hot smoke test standard, there is no regulation on the form of the simulated smoke source, and the matching smoke furnace is heavy and inconvenient to move

[0008]The existence of these problems has a relatively large negative impact on the promotion and application of hot smoke testing. Innovation

To sum up, a perfect hot smoke test technology should include a safe and clean simulated fire source, a convenient and widely applicable smoke generator, and the existing hot smoke test technology cannot meet these requirements

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