Hole mesh steel belt polyethylene composite pipe and production method thereof

Abstract

The invention discloses a hole mesh steel belt polyethylene composite pipe. The hole mesh steel belt polyethylene composite pipe comprises a core pipe made of inner-layer polyethylene, a steel belt reinforcing layer made of a steel belt and an anti-corrosion layer made of outer-layer polyethylene, wherein the inner-layer polyethylene, the outer-layer polyethylene and the steel belt reinforcing layer are fused and compounded into an integrated structure through a sizing system technology; the strength, the rigidity and the impact resistance are higher than those of a plastic pipe; and through the arrangement of the anti-corrosion layer, the composite pipe has the same anti-corrosion performance as the plastic pipe, is high in the use temperature and the corrosion resistance, and is low in the heat conductivity coefficient. Pipes of different pressure grades can be manufactured by adjusting the thickness, the aperture and the number of steel belts. The pipe is high in safety and reliability, and the service life can reach 50 years under normal conditions. Meanwhile, the rapid stress cracking of the plastic pipe is overcome. The overall weight is light, consumables are few, and 30% of polyethylene materials can be saved for pipes with the same design pressure and the same caliber. The pipe is high in rigidity and deformation resistance and can be installed in an overhead mode.

Description

technical field [0001] The invention belongs to the technical field of high-performance composite pipes, and in particular relates to a polyethylene composite pipe with perforated steel strips and a production method thereof. Background technique [0002] Traditional water supply, gas and chemical pipe networks are mainly made of traditional materials such as steel pipes and cast iron pipes. Since the middle of the 20th century, countries all over the world have gradually used plastic pipes to replace traditional pipes in water supply, gas and chemical pipe networks. So far, plastic pipes around the world have maintained a relatively high growth rate. According to statistics, from 2010 to 2018, the investment in urban water supply facilities in my country has increased at a rate of more than 12% per year. Combined with the current development of urban construction and the increase of urban population, the investment in urban water supply and gas pipeline networks in various ...

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Problems solved by technology

[0003] At present, due to the rapid and vigorous development of my country's urban construction and industrial energy, the integration of urban and rural water supply and long-distance water transfer projects have been implemented in large numbers, the country's investment in water conservancy projects has been continuously strengthened, and the safety of pipelines in the industrial field has been upgraded to a national security strategy. The demand for high-pressure, high-quality and high-safety pipes has increased sharply, and the annual market growth rate has reached 20%-30%. However, plastic pipes can no longer meet the requirements of various industries for medium and large-diameter pipes in terms of strength, stiffness and pressure bearing. And the requirements of medium and high pressure pipes, in order to adapt to market changes, relevant manufacturers at home and abroad have introduced various types of plastic composite pipes, but there are obvious shortcomings and shortcomings

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