Steel-plastic composite drain pipe and production method thereof

Abstract

The invention discloses a steel-plastic composite drain pipe and a production method thereof, relating to a water pipeline, in particular to a drain pipe and a production method thereof. An inner pipe is formed by rotatably lapping a plate strip; and the steel-plastic composite drain pipe is characterized in that: the outer surface of the plate strip is provided with convex cavities or vertical ribs; section steel is paved among the cavities or vertical ribs, on the outer surface of the inner pipe; the cavity walls of two sides of each cavity or the vertical ribs are closely attached with thelateral surface of the section steel; two sides of the section steel are pressed in the plate strips; and the cavity walls of the upper parts of the cavities form an outer pipe of the drain pipe or are closely attached with the outer wall of the inner pipe. The production method of the steel-plastic composite drain pipe comprises the following steps of: forming the plate strip provided with the cavities or the vertical ribs, through extruding by using an extruder; enabling the plate strip to pass through a water jacket; simultaneously introducing air pressure to the cavities; enabling the cavities or the vertical ribs to deform through rolling by using a roller; and pressing two sides of the section steel at the plate strip. According to the invention, the cavities or vertical ribs are arranged on the outer surface of the inner pipe; after the section steel is laid, the cavities or the vertical ribs are closely attached with the section steel through rolling by using the roller; the two sides of the section steel are pressed in the plate strip with gluing; and the section steel is stably jointed with the inner pipe without falloff, therefore the quality of the pipe is greatly improved.

Description

Technical field: [0001] A steel-plastic composite drainage pipe and its production method relate to a water pipe, especially a drainage pipe, and its production method. Background technique: [0002] There are two kinds of steel-plastic drainage pipes on the market now, one is such as figure 1 The extruder shown in the figure extrudes the plate without cooling, and through a device that rotates around an axis, the front and back are overlapped to form an inner tube, and then the section steel coated with adhesive, rolled and bent into a spiral shape is laid inside On the surface of the pipe, the adhesive on the surface of the shaped steel sticks to the inner pipe, and then another extruder extrudes the melt to cover the surface of the shaped steel, so that the shaped steel and the inner pipe are integrated, and the melt layer forms the outer pipe of the pipe . This kind of pipe ring has high rigidity, the inner pipe is not easy to leak, the unit weight is light, and the co...

AI Technical Summary

Problems solved by technology

But the bonding seam is long, the quality is not easy to detect, the inner tube is easy to leak, and the unit weight is heavy.

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