Heating clamp for steel-plastic composite pipe

Abstract

The invention relates to a heating device for butting of plastic pipes. A heating clamp for a steel-plastic composite pipe comprises a heating mechanism and a clamping mechanism, wherein the heating mechanism comprises an electromagnetic heating ring and a drive control circuit for the electromagnetic heating ring, the electromagnetic heating ring comprising an insulating case and an excitation coil inside the case, and the excitation coil being electrically connected with the drive control circuit for the electromagnetic heating ring; the clamping mechanism comprises two hold hoops and an axial approaching mechanism which enables the two hold hoops to axially move closer, the axial approaching mechanism comprising springs. According to the heating clamp for the steel-plastic composite pipe, pipelines and pipe fittings can be always in a tightly resisted state during the butting process, and no open flame is needed to melt the plastic layer, so that problems of loose-sealed pipeline systems caused by unchanged initial positions of relative positions of the pipelines and the pipe fittings during the process of butt fusion for the steel-plastic composite pipe, and problems of poor safety and harmful gases caused by heating using open fires can be resolved.

Description

technical field [0001] The invention relates to a plastic pipe heating butt joint device, in particular to a steel-plastic composite pipe heating fixture. Background technique [0002] When connecting pipes, metal pipes are connected by threads. As for plastic pipes, due to the poor strength of plastics and the fact that they will soften when the temperature rises, the pipes are usually welded together by heating and melting with fittings. [0003] A device for connecting plastic pipes is disclosed in Chinese Patent No. 2010202637717, the date of authorization announcement is July 19, 2010, and the patent document titled "An All-in-one Machine for Butt and Socket Welding". [0004] The existing method of butt jointing of steel-plastic composite pipes is the same as that of plastic pipes, but it has the following disadvantages: the relative position of the pipes to be welded and the pipe fittings during the welding process remains unchanged at the initial position. It can a...

AI Technical Summary

Problems solved by technology

[0005] The invention provides a steel-plastic composite pipe heating fixture that can always keep the pipe and pipe fittings in a tight state during the butt joint process and does not need an open flame to melt the plastic layer. The corresponding position with the pipe fittings can only be kept at the initial position, which causes the problem of poor sealing of the pipeline system and the problem of poor safety and harmful gas generated by heating with an open flame

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