Inflating making process and apparatus of spiral wound steel wire reinforced composite plastic pipe

Abstract

The production method of spiral wrapped steel wire reinforced composite plastic pipe material by using air inflation process includes the following steps: continuously extruding formed polymer core pipe, cutting it into the pipe material with a certain length; charging pressure gas into the core pipe, and sealing to obtain rigid straight sealed gas-charged core pipe, feeding said core pipe into steel wire wrapping machine, right-hand and / or left-hand wrapping steel wire round the core pipe, at least wrapping one layer of steel wire as reinforcing body, then feeding said material into polymer outer layer combination device to obtain composite pipe material, diameter-setting and forming, cooling to obtain the invented product with high quality. Said pipe material is long in service life.

Description

Technical field: [0001] The invention relates to a method and a device for manufacturing helically wound steel wire-reinforced composite plastic pipes inflated with air. Background technique: [0002] In recent years, increasing the winding steel wire in the plastic pipe to strengthen the existing report and use of the pipe strength, as CN2313137Y discloses a metal weaving into a net, combined with the inner pipe and the outer pipe into a composite pipe. CN2202838Y also discloses a composite pipe with a layer of metal braided mesh sandwiched between the inner wall layer and the outer wall layer of the pipe, and CN2142168Y discloses a composite pipe with an adhesive layer between at least one winding steel wire layer and the plastic core pipe and the outer plastic. The compound pipe of binder layer, and CN2466468Y discloses a kind of on winding steel wire and first coats a layer of adhesive and protective layer and then forms composite pipe after compounding outer layer on th...

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Problems solved by technology

CN2202838Y also discloses a composite pipe with a layer of metal braided mesh sandwiched between the inner wall layer and the outer wall layer of the pipe, and CN2142168Y discloses a composite pipe with an adhesive layer between at least one winding steel wire layer and the plastic core pipe and the outer plastic. The compound pipe of binder layer, and CN2466468Y discloses a kind of on winding steel wire and first coats a layer of adhesive and protective layer and then forms composite pipe after compounding outer layer on the core pipe, and CN2465937Y discloses a kind of manufacturing wire A device for composite reinforced plastic pipe, the device is provided with a winding machine and a heating unit for heating the core pipe wound with a metal wire between the core pipe extruder and the outer layer extruder, the above examples have common disadvantages, Because the core tube and the multi-wires on the winding need to be heated to better compound with the outer plastic, but some of the above-mentioned technical solutions do not have a heating device, although some have a heating device for heating the core tube wrapped with steel wires, However, the shape and size of the core tube change greatly under the action of the steel wire winding tension and the melt pressure in the composite molding cavity of the middle layer and the outer layer. Composite as a whole, resulting in mutual peeling and delamination, and the inner surface quality of the core tube is also very poor; in addition, the core tube is combined with the steel wire and the outer layer under heating conditions, and the core tube has no internal expansion during the cooling and shaping process of the tube. Strong support for the pipe wall, when cooling and shrinking, there is a tendency and phenomenon of separation from the steel wire layer and the outer composite layer to shrink inward, and peeling off from the steel wire and the outer layer

The composite pipe produced by the above method will cause the composite layer and the steel wire to peel off and delaminate each other due to thermal expansion and contraction and pressure fluctuation factors during long-term use, forming interspaces, and the pressure medium transported by the pipeline will be partially damaged due to the core tube or the end surface of the tube. Penetration from the void will cause damage to the pipeline system, and will also reduce the bearing pressure and service life of the pipeline due to composite delamination.

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