A jet-suction and internal-mixing anti-backfire cutting torch

Abstract

The invention relates to an injection internally-mixed type tempering-resistant cutting torch and belongs to the field of welding and cutting devices. According to an existing cutting torch, the tempering phenomenon can occur and potential safety hazards exist. According to the injection internally-mixed type tempering-resistant cutting torch, a circular hole is formed in a cutting tip connector, a plug screw is arranged in the circular hole, the circular hole extends to the inner portion of the cutting tip connector so that a channel can be formed, a first air chamber is formed between the tail portion of a nozzle and the plug screw, a preheating oxygen pipe is communicated with the first air chamber, a second air chamber is formed between the head of the nozzle and a fixed base, a fuel tube is communicated with the second air chamber, the first air chamber and the second air chamber are communicated through a nozzle channel, one end of a fire-stopping pipe abuts against the fixed base, the other end of the fire-stopping pipe abuts against the bottom face of the channel, a tube core of the fire-stopping tube is communicated with a transverse section of a mixed gas channel, a flame separating chamber is formed between the outer wall of the fire-stopping tube and the inner wall of the channel, and the second air chamber is communicated with the flame separating chamber through air holes. According to the structure, burning of the flame is more stable, the possibility of backdraft of the flame to a mixing zone is eliminated, so that use safety is improved and service life is prolonged.

Description

technical field [0001] The invention belongs to the field of welding and cutting equipment, in particular to a jet-suction and internal-mixing anti-backfire cutting torch. Background technique [0002] The jet-suction cutting torch is one of the most widely used welding and cutting equipment at present. It has a certain anti-backfire function, but there is a shortcoming of uneven mixing of preheated oxygen and gas during the jet-suction process, which leads to uneven combustion of the flame. Stable, and generally the injection suction device is located at the middle and rear of the entire cutting torch, and the mixed gas needs to pass through a section of pipeline to reach the cutting nozzle. The molten metal at the cutting nozzle increases the external pressure, and the flame will still enter the cutting nozzle and burn back along the pipeline. Even if the flame reaches the injection device and is extinguished, the pipeline will explode when the flame burns in the pipeline....

AI Technical Summary

Problems solved by technology

[0002] The jet-suction cutting torch is one of the most widely used welding and cutting equipment at present. It has a certain anti-backfire function, but there is a shortcoming of uneven mixing of preheated oxygen and gas during the jet-suction process, which leads to uneven combustion of the flame. Stable, and generally the injection suction device is located at the middle and rear of the entire cutting torch, and the mixed gas needs to pass through a section of pipeline to reach the cutting nozzle. The molten metal at the cutting nozzle increases the external pressure, and the flame will still enter the cutting nozzle and burn back along the pipeline. Even if the flame reaches the injection device and is extinguished, the pipeline will explode when the flame burns in the pipeline. The cutting torch is damaged and cannot be used normally. If the flame passes through the injection and suction device smoothly, it will point directly at the gas bottle, and the consequences will be disastrous

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