Air blaster

Abstract

The invention discloses an air blaster. The air blaster comprises an inner tube, an inner tube filling cavity, an ignition mechanism, an inner tube inflation mechanism and an outer tube, wherein the inner tube filling cavity is formed in the inner tube; the two ends of the inner tube are connected with a first sealing inner cover and a second sealing inner cover in a sealing manner respectively; the outer tube serves as the outer layer of the inner tube; a first sealing outer cover and a second sealing outer cover are connected between the inner tube and the outer tube in a sealing manner; the ignition mechanism and the inner tube inflation mechanism are mounted on the first sealing inner cover or the second sealing inner cover; an outer tube inflation mechanism is mounted on the first sealing outer cover or the second sealing outer cover; the sealing cavity between the inner tube and the outer tube is an outer tube filling cavity; the inner tube filling cavity is filled with supercritical oxygen and carbon-containing organic matters; and the outer tube filling cavity is filled with such liquid easy-to-gasify matters as liquid carbon dioxide and liquid nitrogen. The air blaster has the advantages of low manufacturing cost, high reaction material mixing uniformity, high heat release efficiency, good transport security and high blasting power.

Description

technical field [0001] The invention belongs to the technical field of blasters, in particular to gas blasters. Background technique [0002] Gas blasting technology is to use the vaporization and expansion of easily vaporized liquid or solid substances to generate high-pressure gas, which makes the surrounding medium expand to do work and cause fragmentation. It has the characteristics of no open flame, safety and high efficiency. [0003] Carbon dioxide gas blasters are typical blasting equipment in gas blasting technology, and are widely used in mining, geological exploration, cement, steel, electric power and other industries, subways and tunnels, municipal engineering, underwater engineering, and emergency rescue. [0004] The existing gas blaster mainly includes a vaporization liquid storage pipe and a heating detonator installed in the vaporization liquid storage pipe; the heating detonator ignites and generates heat to vaporize easily vaporized substances in the vapo...

AI Technical Summary

Problems solved by technology

[0006] Adopt the gas blaster of above-mentioned detonator structure, existing problem is: 1, the thermal reaction material that needs to fill in the detonator needs to carry out the processing of processes such as material mixing, mixing evenly, rolling material or bagging, filling process It is time-consuming and labor-intensive, and the manufacturing cost is high; 2. During the filling process of the detonator, the oxidant and reducing agent are prone to uneven mixing, resulting in low heat release efficiency; 3. The thermal reaction material needs to be mixed and filled in advance. If the medium temperature is too high, it will easily cause combustion or explosion, which has great potential safety hazards; 4. Due to the damp, deterioration or deformation of the detonating material, it is easy to cause squibs, and it is impossible to determine the cause of the squibs, so it cannot pass The squib method eliminates potential safety hazards; 5. The detonation method of the existing gas blaster uses a solid activator to burn to generate high temperature, which directly conducts heat to the liquid carbon dioxide, causing the liquid carbon dioxide to gasify and expand, and the heat absorption efficiency of the liquid carbon dioxide is low; 6. The detonator The heat release rate is slow, the chemical reaction is insufficient, the heat release efficiency is low, the pressure of the liquid is relatively small after gasification, and the blasting power is small; 7. After the blasting, the reactants in the detonator produce a large amount of toxic and harmful gases. , such as hydrogen sulfide, sulfur dioxide, nitrogen monoxide, nitrogen dioxide and other gases, bring relatively large poisonous pollution to the blasting site

[0008] Yet the weak point that liquid oxygen explosive exists is: 1, it can only be used in open-air operation and building road and bridge, blasting building etc. If it overflows, it will cause pit gas and coal dust explosions in the mine and cause accidents; 2. Liquid oxygen explosives must be used as soon as they are installed, generally within one hour after they are made, otherwise the liquid oxygen will lose its effectiveness when it volatilizes; 3. The charging operation of liquid oxygen explosive is complicated and the safety is poor; 4. The blasting temperature of liquid oxygen explosive is too high, which is easy to cause combustion

[0009] Due to the above shortcomings of liquid oxygen explosive technology, the research and development of liquid oxygen explosive technology is limited. At present, liquid oxygen explosive technology is rarely used

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