A frp strip reinforced thermoplastic resin spiral corrugated pipe

Abstract

The invention discloses an FRP strip reinforced thermoplastic resin spiral corrugated pipe, which comprises an inner layer formed of thermoplastic resin, an outer layer formed of chopped fiber reinforced thermoplastic resin and FRP strips, the outer layer has spiral ribs, The FRP strip is helically fixed on the surface of the outer ring of the inner layer and corresponds to the position of the convex rib. The invention makes full use of the high rigidity of the FRP strip and the high strength and impact resistance of the chopped fiber reinforced thermoplastic resin to realize the optimized design of the three-layer structure combination of the spiral corrugated pipe. Compared with the ordinary spiral corrugated pipe, it has light weight, high strength, high Rigidity, impact resistance and low overall cost; compared with steel belt reinforced spiral bellows, the ring rigidity is equivalent, and the inner and outer layers have no delamination, rust peeling and other adverse phenomena, and at the same time have the advantages of crack resistance, wear resistance and easy cutting. .

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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