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PP high-modulus twining structural wall corrugated pipe and manufacturing method thereof

A structural wall, high modulus technology, applied in the direction of pipes, rigid pipes, mechanical equipment, etc., can solve the problems of pipe deformation and insufficient rigidity, and achieve the effect of enhanced strength, best performance, and firm welding.

Inactive Publication Date: 2015-11-11
HUBEI TONGSU PIPELINE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the ring stiffness of HDPE corrugated pipes in China is not enough, the pipes will be deformed due to the inability to withstand external pressure during construction or function.

Method used

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  • PP high-modulus twining structural wall corrugated pipe and manufacturing method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The manufacturing method of the bellows includes the following steps:

[0032] a. Extruding shaped strips: extruding continuous shaped strip units through the first extruder;

[0033] b. Shaping of special-shaped strips: the special-shaped strip unit is cooled and shaped at 55°C under the conditions of wind blowing and air pressure spray by moving the forming mold; after cooling and forming, preheating and drying are carried out;

[0034] c. Winding special-shaped strips: spirally wind two special-shaped belt units side by side on the forming drum, and form a gap of 100mm between the flanges on adjacent special-shaped belt units;

[0035] d. Welding: Continuously extrude molten plastic melt into the gap through the second extruder;

[0036] e. Pressing: apply opposite pressure on the outer side of the flange on the adjacent special-shaped belt unit through the pressure roller, so that the flange on the adjacent special-shaped belt unit and the plastic melt in the gap a...

Embodiment 2

[0041] The manufacturing method of the bellows includes the following steps:

[0042] a. Extruding shaped strips: extruding continuous shaped strip units through the first extruder;

[0043] b. Shaping of special-shaped strips: the special-shaped strip unit is cooled and shaped at 60°C under the conditions of wind blowing and air pressure spray by moving the forming mold; after cooling and forming, preheating and drying are carried out;

[0044] c. Winding special-shaped strips: spirally wind two special-shaped belt units side by side on the forming drum, and form a gap of 120mm between the flanges on adjacent special-shaped belt units;

[0045] d. Welding: Continuously extrude molten plastic melt into the gap through the second extruder;

[0046] e. Pressing: apply opposite pressure on the outer side of the flange on the adjacent special-shaped belt unit through the pressure roller, so that the flange on the adjacent special-shaped belt unit and the plastic melt in the gap a...

Embodiment 3

[0051] The manufacturing method of the bellows includes the following steps:

[0052] a. Extruding shaped strips: extruding continuous shaped strip units through the first extruder;

[0053] b. Shaping of special-shaped strips: the special-shaped strip unit is cooled and shaped at 58°C under the conditions of wind blowing and air pressure spray by moving the forming mold; after cooling and forming, it is then preheated and dried;

[0054] c. Winding special-shaped strips: spirally wind two special-shaped belt units side by side on the forming drum, and form a gap of 110mm between the flanges on adjacent special-shaped belt units;

[0055]d. Welding: Continuously extrude molten plastic melt into the gap through the second extruder;

[0056] e. Pressing: apply opposite pressure to the outside of the flange on the adjacent special-shaped belt unit through the pressure roller, so that the flange on the adjacent special-shaped belt unit and the plastic melt in the gap are fused in...

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Abstract

A PP high-modulus twining structural wall corrugated pipe comprises a body. The body is a pipe molded by twining and fusing specially-shaped strip units. Each specially-shaped strip unit is provided with a square strip-shaped bottom, the bottom is turned outwards in the radial direction of the pipe to form a flange, a gap is reserved between the flanges of every two adjacent specially-shaped strip units and provided with a hot-melting plastic layer, and therefore every two adjacent specially-shaped strip units are fused and molded into a whole. Lining reinforcing ribs are fused between the flanges and the bottoms of the specially-shaped strip units. The positions, connected with the tops of the flanges, of the lining reinforcing ribs are provided with arc-shaped transitional parts. The invention further provides a manufacturing method. The circular rigidity of the corrugated pipe can be effectively improved.

Description

technical field [0001] The invention relates to the technical field of plastic pipes, in particular to a PP high-modulus winding wall corrugated pipe and a preparation method thereof. Background technique [0002] The new lined reinforced winding pipe is a new type of lightweight pipe made of high-density polyethylene. It has the characteristics of light weight, high pressure resistance, good toughness, convenient connection, fast construction, and long life. Its excellent pipe wall structure design , Compared with other structural pipes, the cost is greatly reduced, and because of the convenient and reliable connection, it is widely used at home and abroad, replacing concrete pipes and cast iron pipes in large quantities. [0003] Since the HDPE corrugated pipe is usually used as a pipe buried underground for drainage, the external pressure it bears directly affects the performance of the pipe, and its measurement index is the ring stiffness. If the ring stiffness of HDPE ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29D23/00B29C47/90B29C53/60B29C53/78B29C53/80B29C65/42F16L9/16B29C48/90
Inventor 庞震
Owner HUBEI TONGSU PIPELINE CO LTD
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