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HDPE double-wall corrugated winding pipe

A coiled pipe and corrugated technology, applied in the field of HDPE double-wall corrugated coiled pipe, can solve the problems of cracking at the lap joint of the pipe body, and achieve the effect of preventing local rupture, improving the energy absorption capacity, and solving the cracking of the lap joint.

Active Publication Date: 2019-03-12
四川亚塑新材料有限公司
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a HDPE double-wall corrugated winding pipe to improve the ring stiffness index and solve the problem of cracking at the lap joint of the pipe body

Method used

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  • HDPE double-wall corrugated winding pipe
  • HDPE double-wall corrugated winding pipe

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Embodiment

[0020] Such as Figure 1~2 As shown, the present invention provides a HDPE double-wall corrugated winding pipe, which has a pipe body 1 with a smooth inner wall. The pipe body 1 is made of HDPE material. Since the drain pipe needs to have a large radius, the conventional method cannot be completed. The pipe body 1 is completed by winding molding. Firstly, a strip-shaped HDPE material strip 12 is obtained by extrusion molding. The strip 12 is wound on a core rod in a spiral manner by a winding feeder. The two sides of the strip 12 in the width direction The ends have an overlapping structure so that after winding the two ends overlap each other and are thermally fused together. With such a manufacturing method, large-diameter pipes that cannot be obtained in conventional methods can be obtained, and the diameter of the pipe can reach more than 2m. The ring stiffness of the pipe is also increased by the hollow strip 2 arranged outside the pipe body 1 , the hollow strip 2 is als...

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Abstract

The invention discloses an HDPE double-wall corrugated winding pipe comprising a pipe body. The pipe body is formed by spirally winding a plate strip, and the two sides of the plate strip are spirally-coiled lap joints; a hollow strip spirally wound on the exterior of the pipe body is further included, protrusions formed by convex shapes are arranged at the lap joints of the pipe body; the hollowstrip is provided with sinking parts matched with the protrusions in shape, and the protrusions are located in the sinking parts. The lap joints of the plate strip are located inside the sinking partsof the hollow strip and are constrained by the sinking parts, and the shortcoming of cracking at the lap joints of the corrugated winding pipe is effectively overcome. In addition, reinforcing ribs are arranged inside the hollow strip, the ring stiffness of the corrugated winding pipe is improved, the energy absorbing ability of the corrugated winding pipe is further improved, and local crackingof the corrugated winding pipe is prevented.

Description

Technical field: [0001] The invention relates to a drainage pipe, in particular to an HDPE double-wall corrugated winding pipe. Background technique: [0002] At present, HDPE double-wall corrugated winding pipe is widely used in urban water supply and drainage pipes. Due to its large inner diameter and low internal pressure under working conditions, the double-wall corrugated winding pipe just meets these two conditions; it has a great cost-effective advantage. For double-wall corrugations, ring stiffness is a relatively important indicator, which reflects that the pipe body can maintain rigidity when driving in external soil and on the ground. At present, the pipe body of HDPE double-wall corrugated winding pipe is made by winding, and the overlapping position of the spiral winding is easy to crack under the action of external force. [0003] At present, HDPE double-wall corrugated winding pipe mainly has two problems: the ring stiffness is not easy to meet the standard a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L9/16F16L57/02
CPCF16L9/16F16L57/02
Inventor 刘来琼
Owner 四川亚塑新材料有限公司
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