Production line for butt welding plastic-steel compounded force pipe

Abstract

The invention relates to a production line for a butt welding plastic-steel composite force pipe, and solves the problem that a steel pipe cannot be compounded with plastic easily. The production line comprises inner pipe formation equipment, steel pipe butt welding equipment and outer plastic layer formation equipment, wherein the inner pipe formation equipment comprises an inner glue extruder and a die; the steel pipe butt welding equipment is connected with an outer glue extruder and a die which are arranged behind the steel pipe butt welding equipment; an inner pipe caterpillar tractor and an inner pipe guiding bracket device are arranged between the inner pipe formation equipment and the steel pipe butt welding equipment; and the inner pipe guiding bracket device is arranged behind the inner pipe caterpillar tractor. As the inner glue extruder, the outer glue extruder and the dies are additionally arranged, a film is coated on the outer surface of an inner pipe through the inner glue extruder and the corresponding die to form a thin film structure, and a sticking film is formed on the outer surface of a steal pipe firstly through the outer glue extruder and the corresponding die to facilitate bonding between the steel pipe and an outer plastic layer. Therefore, the problem that the steel pipe cannot be compounded with plastic easily is solved.

Description

technical field [0001] The invention relates to a pipe production line, in particular to a butt welded steel-plastic composite pressure pipe production line which is continuously formed and lined with steel pipes through butt welding. Background technique [0002] A new type of composite pipe, referred to as steel-plastic pipe in many places. The plastic in the steel-plastic composite pipe is generally high-density polyethylene (HDPE), and high-temperature-resistant polyethylene (PERT) and random copolymerized polypropylene (PPR) are also used. Steel-plastic composite pressure pipe, the middle layer of this pipe is a steel belt layer formed by butt welding of high-carbon steel strips through crimping, and the inner and outer layers are high-density polyethylene (HDPE). The middle layer of this kind of pipe is a steel belt, so the pressure bearing performance of the pipe is very good. Unlike the aluminum belt, the pressure bearing is not high. The maximum diameter of the pip...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a production line for butt welded steel-plastic composite pressure pipes, adding coating equipment on the outer surface of the inner pipe to facilitate compounding with steel pipes, and adding coating equipment on the outer surface of steel pipes to facilitate compounding with outer plastics, which solves the problem that steel pipes and plastics are not easy Combined puzzle

Images