Steel-plastic composite pipe for low-pressure water delivery

Abstract

The invention discloses a steel-plastic composite pipe for low-pressure water delivery, belonging to the field of water pipes. The structure of the steel-plastic composite pipe comprises a plastic pipe body and a reinforcing rib integrated with the pipe body. A metal reinforcing belt is compounded inside the reinforcing rib; a lap-joint surface of the plastic pipe body is provided with a strip-shaped bulge and a strip-shaped groove which are mutually matched; a reinforcing surface is annularly enwound between two reinforcing ribs having lap-joint surfaces. Compared with the prior art, the steel-plastic composite pipe for low-pressure water delivery has bearable internal pressure, firmly welded welding lines, uniform welding, good sealing performance, corrosion resistance and oxidation resistance, increases the lap-joint area, enhances the welding strength, prolongs the service life and reduces the using cost without leaking or breaking at the welding lines so that the steel-plastic composite pipe has very good value of promotion and application.

Description

technical field [0001] The invention relates to a water delivery pipe, in particular to a steel-plastic composite pipe for low-pressure water delivery. Background technique [0002] The plastic-steel composite pipes currently produced in industry, because the overlapping surface is very smooth, the extruded material strip on the welding surface of the strip is easy to deviate during winding welding, resulting in uneven extrusion of the material strip inside and outside, and weak welding of the weld seam. The overlapping surface of the strip is small. After winding and welding, the welding surface of the strip bears low internal hydrostatic pressure. The overlapping surface is not firm and the welding strength is not enough. Water leakage or fracture often occurs from the weld, which is not only for people to use Inconvenience and increased maintenance costs. The bonding problem of the seam cannot be solved in its winding technology, so it is difficult to be used in a pressu...

AI Technical Summary

Problems solved by technology

[0002] The plastic-steel composite pipes currently produced in industry, because the overlapping surface is very smooth, the extruded material strip on the welding surface of the strip is easy to deviate during winding welding, resulting in uneven extrusion of the material strip inside and outside, and weak welding of the weld seam. The overlapping surface of the strip is small. After winding and welding, the welding surface of the strip bears low internal hydrostatic pressure. The overlapping surface is not firm and the welding strength is not enough. Water leakage or fracture often occurs from the weld, which is not only for people to use Inconvenience and increased maintenance costs

Its winding technology fails to solve the bonding problem of the seam, so it is difficult to be used in the pressurized water delivery system

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