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Method and appts. for suppressing combustible substance explosion and diffusion

A technology of explosion propagation and explosion danger, which is applied in fire rescue and other fields, and can solve the problems that the explosion-proof device cannot block the explosion, land at the rear of the flame zone, or even fall behind the flame zone, etc.

Inactive Publication Date: 2012-04-04
CHINA UNIV OF MINING & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the action pressure of the explosion-proof device is higher than the pressure of the precursor pressure wave, or the delay time of the action of the explosion-proof device exceeds the time required for the flame to reach the device, the inhibitor released by it will land at the rear of the flame zone, or even fall on the flame zone. After the flame zone, the flame front that is not affected by the inhibitor will continue to propagate forward, and the explosion-proof device will not be able to block the explosion.

Method used

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  • Method and appts. for suppressing combustible substance explosion and diffusion
  • Method and appts. for suppressing combustible substance explosion and diffusion
  • Method and appts. for suppressing combustible substance explosion and diffusion

Examples

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example 1

[0013] Example one, figure 1 It is a schematic diagram of combustible explosion in a certain confined space, 1 is the rear wall, 2 is the front wall, and 3 is the explosion site, and the front wall 2 of the left and right sides of the explosion site 3 (also can be in the rear wall) 1) Two vacuum chamber devices 4 that suppress the explosion propagation of combustibles are preset in parallel. The vacuum chamber device 4 is sealed to face the space where explosion may occur. According to the actual situation on site, multiple vacuum chamber devices 4 can be installed. The vacuum cavity device 4 is composed of a vacuum shell 4-1 and a weak panel 4-2 embedded in its seal. The inner surface of the vacuum shell 4-1 is covered with a wave-absorbing and energy-absorbing layer 4-3, which absorbs waves and absorbs energy. Layer 4-3 is made of flame-retardant or non-combustible materials with special shapes on the surface, such as porous or reticular asbestos layer materials; image 3 s...

example 2

[0014] Example two, figure 2 As shown, it is basically the same as the example, except that a vacuum cavity device 4 is preset in the front wall 2 and the rear wall 1 of the left and right sides of the explosion site 3, and according to the actual situation on the spot, each Two vacuum chamber devices 4 are preset.

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Abstract

The invention relates to method and device for inhibiting detonation propagation of combustible substance. The method includes pre-installing (in tunnels or walls) multiple vacuum chamber units having sealed ends facing the spaces where explosion might happen. The vacuum chamber units have inner surfaces coated with wave / energy absorbing layer, and have sealed ends provided with weak panels capable of being broken by environmental pressure variations. When explosion happens, the vacuum chamber receives the explosion shock; the weak panels are broken, expansion air, explosion shock and energy are absorbed by the vacuum chamber, as the chamber is negative pressure and vacuum, it can absorb the explosion shock and energy to inhibit maximatily the detonation propagation of the explosion shockand energy, thereby damage is reduced.

Description

technical field [0001] The invention relates to a method for suppressing the explosion propagation of combustibles and its transposition, and is especially suitable for mine roadways with potential safety hazards, flammable and explosive, and also suitable for places where combustible explosion hazards exist in other confined spaces. Background technique [0002] According to literature and media reports, the casualties and property losses caused by combustible explosions are huge all over the world. In my country, coal mine gas and coal dust explosions occur frequently, and the catastrophic consequences are very serious. In order to solve this problem, explosion-proof shed facilities such as water tanks, water bags and rock powder sheds are widely used in the production process of coal mines, also known as passive explosion-proof sheds, which are passive explosion-proof devices, and water and rock powder are used as flame suppressants respectively. The flame suppressant re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A62C4/00A62C3/00
Inventor 蒋曙光欧雪梅吴征艳
Owner CHINA UNIV OF MINING & TECH
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