Large-caliber steel-plastic reinforced composite pipe section and reinforced composite pipe forming process

Abstract

The invention provides a large-caliber steel-plastic reinforced composite pipe section and belongs to the technical field of reinforced composite pipelines. The large-caliber steel-plastic reinforced composite pipe section is composed of a reinforced composite pipe and flanges at two ends, a central layer of the reinforced composite pipe is a spiral welded steel pipe, the outer wall of the spiral welded steel pipe is provided with a glass reinforced plastic winding layer to form an outer layer of the reinforced composite pipe, and the inner wall of the spiral welded steel pipe is provided with a belt hook wire screen and a rotary-molding coating to form an inner layer of the reinforced composite pipe. A reinforced composite pipe forming process comprises the steps of adopting a spiral welding process to manufacture the spiral welded steel pipe, welding the belt hook wire screen on the inner wall of the steel pipe, adopting a rotary-molding forming device to manufacture the rotary-molding coating and arranging the formed glass reinforced plastic winding layer on the outer surface. The large-caliber steel-plastic reinforced composite pipe section has excellent corrosion resistance performance and light high-strength characteristic and is superior to various currently-used pipelines in the aspects of pressure resistance, corrosion resistance, service life, production cost and social and economic benefits, and high efficiency, energy saving and environmental protection are achieved in the forming process.

Description

technical field [0001] The invention belongs to the technical field of glass fiber reinforced plastic composite pipes, and in particular relates to a large-diameter steel-plastic reinforced composite pipe joint and a forming process for the reinforced composite pipe. Background technique [0002] At present, in public water supply projects and ventilation projects such as large-scale water conservancy projects, tap water raw water inlet pipes, long-distance drinking water supply projects, urban drainage mains, etc., the large-diameter water delivery pipes used mainly include steel plate pipes, cast iron pipes, and steel cylinders. Concrete pipes, etc. From the perspective of the use of various pipes, steel pipes and cast iron pipes need anti-corrosion treatment on the inner wall. The cost of anti-corrosion treatment leads to high production costs of pipes. Special equipment increases the complexity of the installation process; although cast iron pipes are installed on-site u...

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Problems solved by technology

[0002] At present, in public water supply projects and ventilation projects such as large-scale water conservancy projects, tap water raw water inlet pipes, long-distance drinking water supply projects, urban drainage mains, etc., the large-diameter water delivery pipes used mainly include steel plate pipes, cast iron pipes, and steel cylinders. Concrete pipes, etc. From the perspective of the use of various pipes, steel pipes and cast iron pipes need anti-corrosion treatment on the inner wall. The cost of anti-corrosion treatment leads to high production costs of pipes. Special equipment increases the complexity of the installation process; although cast iron pipes are installed on-site using a relatively simple method of socket sockets, the manufacturing process limits the diameter of the pipe to less than 3m, and the specific gravity is high. The material is brittle, and there are many potential safety hazards such as corrosion and leakage in actual use; and the bulkiness of steel tubular concrete pipes is a more prominent problem. Under normal circumstances, a pipe section with a diameter of 3m and a length of 5m weighs 35 tons. Transportation and construction bring a lot of trouble, and the cement is not corrosion-resistant, so it is not suitable for application in acidic and saline-alkali soil areas

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