Method for producing flexible waterproof casing

Abstract

The invention discloses a method for producing a flexible waterproof casing. The method includes producing a steel casing body and a heat shrink tubing, arranging a lengthening section stretching out of a wall at a water facing end of the steel casing body, and arranging anti-skidding teeth and a port covering plate at the lengthening section; arranging an elastic sealed inner lining tube inside the heat shrink tubing; and covering the heat shrink tubing lined with the elastic sealed inner lining tube on the lengthening section, sleeving the portion stretching out of the lengthening section on a laid pipe, and sealing a flexible packing seal in the steel casing body. According to the method, the waterproof flexible sealing process of the water facing side of the pipe when the pipe penetrates through a concrete interface for laying is strengthened, defects of common flexible sealing packing are overcome, hidden danger caused by leakage resulted from cracks generated between the pipe and the casing due to the air shrinkage and aging of the packing is avoided, the waterproof and flexible sealing performances are excellent, stable and durable, maintenance probability is reduced, the maintenance cost is saved, the economic benefit is remarkable, and the application range is wide.

Description

technical field [0001] The invention relates to a method for manufacturing a waterproof casing, in particular to a method for manufacturing a flexible waterproof casing. Background technique [0002] At present, when laying pipelines, it is usually used such as figure 1 As shown in the ordinary flexible casing, the plugging filler of the ordinary flexible waterproof casing cannot expand and contract simultaneously with the thermal expansion and contraction of the pipeline, and is only suitable for thick steel pipelines or other types of hard pipelines that are less deformed with temperature difference and pressure The flexible waterproof treatment during laying cannot be applied to the flexible waterproof treatment during laying of plastic pipes. Because the deformation of the plastic pipe is larger than that of the steel pipe, when the plastic pipe deforms, the common plugging filler installed between the casing and the outer wall of the pipe will form cracks and lose its ...

AI Technical Summary

Problems solved by technology

[0002] At present, when laying pipelines, usually use such as figure 1 The ordinary flexible casing shown, the plugging filler of the ordinary flexible waterproof casing cannot expand and contract simultaneously with the thermal expansion and contraction of the pipeline, and is only suitable for thick steel pipelines or other types of hard pipelines that are less deformed with temperature difference and pressure Flexible waterproof treatment during laying is not suitable for flexible waterproof treatment during laying of plastic pipes

Because the deformation of the plastic pipe is larger than that of the steel pipe, when the plastic pipe is deformed, the ordinary plugging filler installed between the casing and the outer wall of the pipe will form cracks and lose its waterproof function, resulting in leakage

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