Steel belt material and method for manufacturing spiral drain pipe by using same

Abstract

The invention relates to a steel belt material and a method for manufacturing a spiral drain pipe by using the same. The steel belt material comprises a belt material body which is shaped through extrusion molding and is internally provided with a plurality of cavities extending in the length direction; and steel belts are inlayed in a rib of the belt material body. The method for manufacturing a spiral drain pipe by using the steel belt material comprises the following four steps: extruding to form a steel belt material; forming a molded continuous steel belt material after shaping and cooling; winding the continuous steel belt materials to form continuous tube materials and bonding two bonding faces of the steel belt material; compacting the outer surface by using an adjustable pressure wheel to form a whole tube material; and cooling and cutting the continuous tube material to form a spiral drain pipe. The steel belt material and the drain pipe manufactured by using the steel belt material are stable in the structure and reliable in the tube connection, and are suitable for non-excavation works. The invention also relates to a method for manufacturing the spiral drain pipe by using the steel belt material.

Description

Technical field [0001] The invention relates to the technical field of steel-plastic drainage pipes, in particular to a steel-plastic strip and a method for manufacturing a spiral drainage pipe using the strip. Background technique [0002] The industry standard number CJ / T 270-2007 of polyethylene plastic-steel winding pipes is due to its unique structure with external spiral ribs, which makes its pipes have higher ring stiffness among similar plastic drainage pipes, such as figure 1 Shown. However, due to the vertical rib structure of this kind of pipe, in the production process, the vertical steel strip is prone to inverted ribs, which leads to a sharp drop in the ring stiffness of the pipe, and because the diameter of the pipe is generally large, it is generally stored in Outdoors, the stacking height has strict requirements. If the pipes are stacked in more than two layers, the vertical ribs of the pipes below will be overwhelmed, and the ribs or cracks of the pipes will app...

AI Technical Summary

Problems solved by technology

However, due to the vertical rib structure of this kind of pipe, during the production process, the vertical steel belt is prone to be ribbed, which leads to a sharp drop in the ring stiffness of the pipe, and because the diameter of the pipe is generally relatively large, it is generally stored in Outdoors, there are strict requirements on the stacking height. Stacking more than two layers of pipes will overwhelm the vertical bars of the pipes below, and the tendons will collapse or the pipes will crack if they are exposed to the wind and sun for more than a week. The above performance is more prominent; in the process of shipment, there will inevitably be bumps, so one end of the pipe is often damaged. After arriving at the construction site, the damaged end of the pipe must be cut off with a special tool, and the problem of pipe sealing should be reprocessed. It is difficult to pass the closed water test once

In addition, the plastic protective layer on the top of the external reinforcement of the plastic-steel winding drainage pipe is very thin. If the plastic outer layer is damaged during construction and handling, the steel belt used as reinforcement is easily corroded and damaged, thus losing its strength. , then the strength of the whole pipe will be sharply reduced or even lost; the third is that the strip part is very weak and the tensile strength is very low; due to the vertical structure, it is not recommended to use the package method when transporting the pipe, because it is easy to put the pipe vertical reinforcement Part of the plastic part is worn out, and when casing, there should not be too much casing, which will cause the vertical bar to collapse due to excessive weight, resulting in high transportation costs; the outer wall of the pipe is a vertical structure, which cannot be used for non-excavation projects, and cannot be made It is used for dragging pipes; when the electric fusion connection method is used, it can only be welded on the inner wall of the pipe, and special supporting tooling is required, which is heavy, the connection is very inconvenient and it is difficult to ensure the airtight performance; the belt used for manufacturing polyethylene plastic-steel winding pipes The polyethylene part in the material and the polyethylene in the overlapping part of the pipe are very weak, and it is easy to break the pipe during the hoisting process.

[0003] A double-flat-wall pipe announced in patent 201020172030.8, under the same ring rigidity, the weight of the pipe is much higher than that of the polyethylene-plastic-steel winding pipe, and the steel strip must be pressed and shaped during production, and the winding strip Two polyethylene extruders are required for the material, and the outer layer of polyethylene is in a hot-melt state. At this time, the steel belt has a certain degree of flexibility, and the steel belt will often be stretched out, the bond is not strong, and there are many processes. Complicated, high consumption of polyethylene, great increase in pipe cost, especially for pipes with smaller diameters

Due to the uneven thermal shrinkage of the pipe, the inner and outer walls are not smooth, it is not safe to weld the pipe, and water leakage and seepage are prone to occur.

[0004] In patent 200820089887, the polyethylene steel tape reinforced hollow winding structure wall pipe material has the characteristics of hollow holes and flat steel strips, but it does not clearly propose how to realize the manufacture of this wall pipe material. In practice A large number of further tests and optimized designs are required in production

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