Glass-steel reinforced plastic pipe and manufacturing method thereof

Abstract

The invention relates to a glass-steel reinforced plastic pipe which comprises a plastic internal mold pipe and a glass-steel reinforced layer, wherein the glass-steel reinforced layer is prepared by winding on the plastic internal pipe and adopting a winding technology for producing a glass steel pipe; the plastic internal mold pipe is a common PVC (Polyvinyl Chloride) pipe, a common PE (Polyethylene) pipe or a common PP (Polypropylene) pipe conventionally; and the internal mold pipe can be a single-hole pipe form or a combined perforated pipe form formed by binding a plurality of single-hole plastic pipes and also can be a ready-made porous plastic pipe (such as a PVC honeycomb pipe or a plum pipe). The glass-steel reinforced plastic adopts a form of evenly and repeatedly winding glass fiber on the plastic internal mold pipe in a meshy way, thereby enabling the internal and external binding force to be far stronger than that of reinforced forms of adhering, fastening mechanical fasteners and extruding; and the pipe has the characteristics of excellent mechanical property, favorable anticorrosion property and wearing resistance as well as favorable tenacity and is especially suitable for pipeline construction which needs to be deeply buried and externally expose.

Description

technical field [0001] The invention relates to a reinforced pipeline structure combined with glass fiber reinforced plastics and plastic pipes (PVC / PE / PP) and a manufacturing method Background technique [0002] FRP pipes are mainly used for cable protection, and can also be used for road administration, communication, water supply and drainage pipes. The communication pipe network adopts PVC (polyvinyl chloride plastic) honeycomb or plum blossom small-caliber pipe, and PE (polyethylene) corrugated pipe. PVC and PE pipes of various calibers are used in urban underground pipe networks. PE pipes are mainly used in drinking water delivery systems, natural gas delivery systems, irrigation systems, sewage and drainage systems; PP pipes are widely used in water supply and drainage pipelines. PVC can be divided into rigid polyvinyl chloride (PVC-U) and chlorinated polyvinyl chloride (PVC-C); PP can be divided into PP-H (homopolypropylene), PP-B (block copolymer polypropylene) An...

AI Technical Summary

Problems solved by technology

[0003] In the application of communication pipe network, the above pipes have these problems: PVC / PE pipes are often used as optical cable protection, due to insufficient strength and the influence of chemical acid soil, they are often damaged

FRP pipe has excellent toughness, strength equal to that of steel pipe, corrosion resistance, light weight, and long service life. There are burrs formed by glass fiber or sand inclusions in some places. When used for optical cable protection, these burrs may pierce the optical cable and cause optical signal transmission errors.

[0004] The above pipes in the urban underground pipe network have these problems: PVC pipes with toxic additives cannot be used as drinking water pipes; PVC pipes are not strong enough. Case of positive pressure rupture

PE pipe has low heat resistance and low pressure bearing capacity, which is easy to cause leakage, deformation, etc.

When PP pipes are installed on the surface and buried outdoors, because the mechanical properties cannot meet the requirements of steel pipes, pipe bursts and damages often occur

When FRP tap water pressure pipes are used in water supply and drainage pipelines, the resin coating on the surface of the inner wall of the pipe is difficult to achieve complete uniformity. Due to the long-term erosion of a large amount of water, the pipe wall will be clearly delaminated, fiber stretched and damaged under long-term use conditions. Phenomena such as falling off, breaking or section buckling will bring huge hidden dangers to safety

[0005] In order to improve these shortcomings and achieve the purpose of strong, corrosion-resistant and erosion-resistant pipelines, many new types of pipes have emerged: the steel pipes that need to be reinforced and anti-corrosion are surface-treated to make plastic-coated steel pipes; A pressure-resistant pipe", which is composed of a PVC pipe, an inner reinforcement device and an outer reinforcement device, wherein the inner reinforcement device is fiber laid in the pipe, and the outer reinforcement device is a ring body surrounding the periphery of the pipe; Chinese patent document CN101476654 The disclosed "PVC pipe reinforcement structure" is to wrap the metal grid filled with PVC as a reinforcement element; there are also glass fibers added to the PVC / PE material to enhance the performance of the pipe, and the effect of these methods is not satisfactory.

There will be delamination of internal and external reinforcement; adding metal will increase the cost and pipe weight, and the metal has polarity. In some cases, such as electrical signals and chemical substances, there are potential safety hazards; adding glass to PVC / PE materials The fiber method has increased strength and is very limited, and it still cannot solve the burr phenomenon and the fiber shedding and delamination phenomenon under the long-term erosion of water flow

Chinese Patent Document CN201383023Y "Composite Structure FRP Communication Optical Cable Cable Protection Tube" Summary of the Invention A communication optical cable cable tube with a composite structure of FRP and PVC is proposed, but its production and production are combined by bonding or mechanical firmware. This kind of production The method makes the internal and external fastening of the product insufficient, and the degree of integration is not ideal

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