Three-wall corrugated pipe and manufacturing equipment thereof

Abstract

The invention discloses a three-wall corrugated pipe and manufacturing equipment thereof. The pipe includes a pipe body, which includes a smooth inner wall layer, a corrugated intermediate layer and a smooth outer wall layer. The inner wall layer and the outer wall layer are closely connected with the crests or troughs of the intermediate layer, and the pipe body is provided with connection ports for mutual connection. Compared with prior arts, the inventive corrugated pipe has a smooth outer wall, which facilitates dragging and rolling during transportation and construction processes and avoids outer wall corrugation breakage and recess to further influence pipe use. Meanwhile, the outer wall layer is covered, in a molten state, on the outer wall of a double-wall corrugated pipe, which increases the pipe wave height and the moment of inertia to realize higher ring stiffness of the pipe and production of pipes with higher strength requirements on one hand, and increases the longitudinal bending strength of the pipe and improves the ring flexibility of the pipe on the other hand, thus realizing the purpose of the invention.

Description

technical field [0001] The invention relates to a plastic pipe and its manufacturing equipment, in particular to a three-wall corrugated pipe and its manufacturing equipment suitable for the fields of agricultural drainage and irrigation, urban sewage discharge and low-pressure water delivery. Background technique [0002] Plastic double-wall corrugated pipe is a new type of plastic pipe developed in the 1990s in the world. Its hollow ring structure is relatively reasonable in mechanics. Therefore, the double-wall corrugated pipe has the characteristics of light texture, high strength, and good toughness; at the same time, it also has the advantages of easy laying, low resistance, low cost, and corrosion resistance. Its performance and economic benefits far exceed ordinary plastic pipes , Traditional iron pipes and cement pipes are replacement products of engineering pipes, and are widely used in fields such as agricultural drainage and irrigation, urban sewage discharge and...

AI Technical Summary

Problems solved by technology

[0003] However, since the outer wall of the double-wall corrugated pipe is a corrugated hollow ring structure, there are also some problems in the application of the double-wall corrugated pipe, such as the inconvenience of stacking and transporting the double-wall corrugated pipe due to the irregular corrugated outer wall, and the double-wall corrugated pipe The corrugated pipe is not easy to drag during construction and the outer wall of the corrugated shape is easily affected by external force during the dragging process, resulting in holes in the outer wall, corrugated depressions and reduced pipe strength. Moreover, the structure of the corrugated shape makes the double-wall corrugated pipe in the trough The strength of the position is very low, the double-wall corrugated pipe is prone to warping and deformation, and the longitudinal bending strength is low. At the same time, the rough shape of the double-wall corrugated pipe also makes the pipe unable to be used in fields such as dragging and non-excavation construction

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