Steel-band reinforced steel plastic composite wound pipe

Abstract

The invention discloses a steel-band reinforced steel plastic composite would pipe comprising a pipe wall skeleton formed by winding a formed steel band. The internal surface and the external surface of the pipe wall skeleton are respectively wound by plastic tapes to form the internal wall and the external wall of the composite would pipe; the surface of the external wall is a smooth surface; the cross section of the formed steel band comprises a long leg and a short leg and is in a shape like a Chinese character ji; and in the axial cross section of the pipe wall skeleton, the short leg of the formed steel band is overlapped on the long leg of the adjacent formed steel band. The invention is suitable for water drainage and sewage engineering of municipal facilities, industry, civil use and public buildings and can also be applied to fields of long-distance water transportation, agricultural irrigation and the like.

Description

technical field [0001] The invention relates to the technical field of plastic pipes, in particular to a steel-belt-reinforced steel-plastic composite winding pipe. Background technique [0002] One of the main obstacles encountered in the promotion of plastic buried drainage pipes in recent years is that the materials used for plastic buried drainage pipes with larger diameters (inner diameter above 800 mm) are relatively expensive and the weight per meter (weight per meter length) is relatively large. , The price is more expensive, but reducing the meter weight will cause insufficient ring stiffness. According to practical experience, it is easier to accept the promotion and application of plastic buried drainage pipes with a diameter of less than 800 mm, because although the price of the pipe is more expensive than that of concrete pipes, due to the convenience and speed of construction, the overall cost is close, and the plastic buried drainage pipes are well sealed. Th...

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Problems solved by technology

Currently, there are two main structures of formed steel strips: one type has a cross-section of "Ω" shape, and this kind of composite winding pipe has a deep spiral groove on the outer wall, so the traction resistance encountered during construction is relatively low. It is large, so it can only be used for excavation construction, and cannot be used for non-excavation construction; another kind of formed steel belt uses square pipes. The disadvantage of this kind of composite winding pipe is: in actual production and processing, due to the The closed structure makes it very difficult to helically wind the square tube; in addition, after the square tube is helically wound, there is no overlap between the previous circle and the next circle, resulting in a small axial tensile strength of the composite wound pipe.

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