Backfire preventer used in strain chamber

Abstract

The invention discloses a backfire preventer used in a strain chamber. The backfire preventer comprises a valve body and a valve cover, wherein a gas channel is formed in the middle of the valve body,external threads are arranged on the valve body, internal threads are arranged on the valve cover, and the valve cover is in threaded connection with the valve body; a cavity is formed in the valve cover, a mounting boss and a baffle boss are arranged on the inner wall of the valve cover, and the baffle boss is located between the mounting boss and the valve body; a spring is arranged on the mounting boss, and the spring is connected with a valve plate; and an inclined air hole is formed in the valve plate, the outlet of one end of the air hole is located in the center of the valve plate, andthe outlet of the other end of the air hole and one end face of the valve body are corresponding in position. The backfire preventer has the advantages that the structure is simple, the operation iseasy, parameters such as flame temperature and gas flow are not influenced, the requirements of a welding process can be met, and control, check, cleaning and maintenance are facilitated.

Description

technical field [0001] The invention relates to the field of welding technology, in particular to a flashback preventer for a bacteria chamber. Background technique [0002] Gas cutting or welding tools are often used in steel plate cutting and welding. The main principle is to use the flame generated by the mixed combustion of combustible gas and combustion-supporting gas as a heat source to melt the weldment or welding material. Gas welding equipment consists of welding wire, welding parts, welding torch, acetylene generator, flashback preventer, oxygen pressure reducer, oxygen rubber tube, acetylene rubber tube, oxygen cylinder, etc. Acetylene generators, oxygen cylinders, acetylene cylinders and liquefied petroleum gas cylinders are pressure vessels or fuel containers with explosion and combustion hazards; the combustion-supporting gas is mainly oxygen, and acetylene, calcium carbide, liquefied petroleum gas, etc. It is a substance that is prone to explosion and combust...

AI Technical Summary

Problems solved by technology

Acetylene generators, oxygen cylinders, acetylene cylinders and liquefied petroleum gas cylinders are pressure vessels or fuel containers with explosion and combustion hazards; the combustion-supporting gas is mainly oxygen, and acetylene, calcium carbide, liquefied petroleum gas, etc. It is a substance that is prone to explosion and combustion hazards; tempering during operation and sparks splashing around are dangerous sources of ignition. The existence of the above unsafe factors at the same time may easily lead to explosions and fire accidents.

[0003] During gas cutting or welding, the welding tip or cutting tip of the welding torch or cutting torch is blocked, the overheating of the welding tip or cutting tip increases the gas pressure, increases the flow resistance of the mixed gas, or when the working pressure of acetylene gas is too low or the rubber Pipe blockage, welding torch, cutting torch disrepair, etc. will reduce the outflow speed of the mixed gas, the flame burning speed is greater than the outflow speed of the mixed gas, oxygen backflow, etc. can cause tempering, once the reverse burning flame enters the acetylene generator or acetylene bottle during tempering inside, there will be a combustion explosion accident

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