FRP (Fiber Reinforced Polyethylene) strip reinforced thermoplastic resin helical bellows

Abstract

The invention discloses an FRP (Fiber Reinforced Polyethylene) strip reinforced thermoplastic resin helical bellows. The helical bellows comprises an inner layer, an outer layer and an FRP strip, wherein the inner layer is formed by thermoplastic resin, and the outer layer is formed by chopped fiber reinforced thermoplastic resin; the outer layer is provided with a helical convex rib; and the FRPstrip is helically fixed to the surface of the outer ring of the inner layer and corresponds to convex rib in position. According to the helical bellows disclosed by the invention, by fully utilizinghigh stiffness of the FRP strip and high strength and shock resistance of the chopped fiber reinforced thermoplastic resin, the three-layer structural combination optimization design of the helical bellows is realized; compared with a traditional helical bellows, the FRP strip reinforced thermoplastic resin helical bellows has the advantages of light weight, high strength, high stiffness, shock resistance, low comprehensive cost and the like; and compared with a steel strip reinforced helical bellows, the FRP strip reinforced thermoplastic resin helical bellows has equivalent ring stiffness, has no poor phenomena of layering, corrosion stripping and the like of the inner layer and the outer layer, and meanwhile, has the advantages of being capable of resisting cracking and wear, easy to cut, and the like.

Description

technical field [0001] The invention discloses an FRP strip reinforced thermoplastic resin spiral corrugated pipe, which belongs to the technical field of fiber reinforced polyethylene spiral corrugated pipes. Background technique [0002] With the upsurge of investment in water pollution prevention and control, urban construction and road engineering in the whole country, plastic buried drainage pipes have strong corrosion resistance, wear resistance, anti-leakage, can prevent the pollution of groundwater resources, and are conducive to environmental protection and other advantages. has been widely recognized. However, the main obstacle in the promotion and application of plastic buried drainage pipes is that the pipe material of large diameter (inner diameter ≥ 800mm) plastic buried drainage pipes increases the wall thickness to meet the ring stiffness requirements, and the materials are more expensive and the price is more expensive. Although the strength and ring stiffn...

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a FRP strip reinforced thermoplastic resin spiral corrugation with light weight, high strength, high rigidity, impact resistance, crack resistance, corrosion resistance and easy cutting in view of the deficiencies in the prior art above. Pipe, which effectively solves the problems of excessive deformation and buckling instability caused by the unsatisfactory ring rigidity of the pipe, low outer wall strength, poor impact resistance and short service life under adverse geological conditions

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