Thermoplasticity reinforcing plastic pipe preparation process

Abstract

The present invention discloses a thermoplasticity reinforcing plastic pipe preparation process, which comprises inner pipe layer preparation, reinforcing layer preparation and protection layer preparation and specifically comprises steps of material feeding, heating, extruding, traction, winding, wrapping, code spraying, marking, cutting, coiling, and packing, wherein the screw extruder barrel heating and the mold heating are completed through the three-stage six-zone heating stage, the winding axis center line and the inner pipe axis center line form the angle of 50-60 DEG, and the strip-like material bidirection cross winding structure is formed and comprises the left spiral winding later and the right spiral winding layer. The preparation process is the thermoplasticity reinforcing plastic pipe preparation process with characteristics of high production efficiency and low cost, wherein the pressure bearing capacity can achieve 32 MPa, and the impact resistance can achieve 130 KJ / m<2>.

Description

technical field [0001] The invention relates to the technical field of pipe manufacture, in particular to a preparation process of reinforced thermoplastic pipe. Background technique [0002] With the continuous development of pipeline transportation, the materials to be transported have been expanded to solid, solid-liquid, gas-liquid and sulfur-containing high-viscosity materials, especially in fields such as oil and gas fields, chemical industry, electric power, mines, coal mines, and channel dredging. Performance has more special requirements. To design and manufacture a high-pressure composite pipe that adapts to various complex terrains and environmental conditions in the field, and has comprehensive mechanical properties such as impact resistance, corrosion resistance, light weight, anti-fouling, low friction, and low temperature resistance, in addition to rationally designing the pipe structure , Selection of high-quality materials, reasonable composition ratio, the...

AI Technical Summary

Problems solved by technology

The existing thermoplastic pipe preparation process has the following disadvantages: 1. The winding gap of the reinforcement layer is large (8.0-15.0D), and the pressure bearing capacity is lower than 3.5MPa; 2. The heating of the plastic-coated reinforcement belt is heated by a lamp tube. Uneven heating after winding, the adhesive resin in the reinforcing tape cannot be fully melted, and the bonding strength between layers is poor, resulting in poor pressure bearing capacity and impact resistance of the pipe; 3. No co-extrusion die extrusion process Technology, the use temperature of the pipes produced is below 65°C, the corrosion resistance is poor, and it cannot meet the requirements of the continuous development of pipeline transportation; 4. The number of pipe joints is large, the weight of pipe meters is large, and the installation difficulty of pipeline engineering is increased, and the installation cost is high.

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