Premixed type combustion system for heat treatment of outer surface of plastic pipe and gas nozzle

Abstract

The invention relates to a premixed type combustion system for the heat treatment of the outer surface of a plastic pipe and a gas nozzle. The system consists of a safe control system and a safe pipeline system; the safe control system comprises a PLC controller, a gas leakage detector, an ignition transformer and an ignition system; the safe pipeline system comprises a gas valve group, an air valve group, a mixing chamber and a flame arrester. The feed port of the mixing chamber is connected with the gas valve group and the air valve group respectively, and the discharge hole of the mixing chamber is connected with the gas nozzle through the flame arrestor. The gas nozzle comprises an annular nozzle column; an annular gas-air mixing nozzle is arranged at the middle of the nozzle column, and three rows of holes are alternately formed on the nozzle; a gas-air mixture chamber is arranged between the annular gas-air mixing nozzle and the outer wall of the nozzle column; and the gas-air mixture chamber is connected with a gas-air mixture inlet. The invention overcomes the shortcomings that potential safety hazard exists in the traditional premixed type combustion system and the temperature of a common nozzle is non-uniform and nonadjustable.

Description

technical field [0001] The invention relates to a gas premixed combustion system, in particular to a premixed combustion system with high requirements on the uniformity of the temperature field. Background technique [0002] Some plastic pipes are used in some special occasions, such as automobile, food, chemical industry and other fields. They have higher requirements on the quality of plastic pipes, especially on the toughness and hardness of pipes. In order to obtain good flexibility and hardness of the plastic pipe extruded on the production line, it needs to be extruded and water-cooled before heating treatment, that is, a safe and reliable combustion system and nozzle are required to produce a safe and reliable combustion flame with uniform and adjustable temperature , because the combustion system and nozzle are installed on the plastic pipe extrusion production line, only the surface of the pipe is heat treated, and the heat treatment temperature and uniformity are h...

AI Technical Summary

Problems solved by technology

[0003] The purpose of this invention is to provide a set of safe and reliable premixed combustion system and gas nozzle for heat treatment of the outer surface of plastic pipes for some special heat treatment processes of plastic pipes, which overcomes the common There are potential safety hazards in the premixed combustion system and the disadvantages of uneven and non-adjustable temperature of ordinary nozzles

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