Plastic thin wall pipe

Abstract

The thin wall plastic pipe includes one thin wall pipe and two end sealing plates to seal the ends of the thin wall pipe to constitute sealed structure. The thin wall plastic pipe features that the thin wall pipe is formed with at least one plate rolled into one pipe and connected by means of a longitudinal connector in the joint, with the connector comprising one strip and one groove for the strip to be inserted in. The present invention is suitable for in-situ cast or pre-stressed reinforced concrete floor slab, roof, wall, foundation slab and bridge, especially flat floor slab.

Description

(1) Technical field [0001] The invention relates to a plastic thin-walled tube. (2) Background technology [0002] At present, in the prior art, the cast-in-situ reinforced concrete hollow slab hole-forming member is a permanent core mold, such as paper tube, plastic tube, metal corrugated tube, and light-weight core mold material. These tubular core molds or components are mainly considered to be evacuated to reduce the weight of the hollow slab. For example, the patent number applied by the applicant is ZL99249775.8 and the utility model patent named "fiber-reinforced thin-walled tube for in-situ reinforced concrete filling", which is composed of a hard thin-walled pipe and plugs at both ends, two plugs The two ends of the hard thin-walled tube are sealed to form a closed cavity. The wall of the hard thin-walled tube is composed of a matrix and a cementing material. The matrix can be glass fiber, carbon fiber, organic fiber, non-woven fabric or fiber For braid, the cementitious...

AI Technical Summary

Problems solved by technology

In this way, the half part can be formed in the mold at one time, and its production is simple, convenient, and low in cost. Small size, large transportation volume each time, greatly facilitates handling, reduces transportation costs, and correspondingly reduces construction costs of cast-in-place reinforced concrete hollow slabs. However, when this hollow thin-walled member is assembled on site, it is composed of two half parts It is not convenient to fit and fix, the number of parts is large, and there are many processes for preparation and assembly, and the corresponding production cost is high. The hollow thin-walled member formed by the connection of groove-type overlapping parts, half parts are easy to loosen and slip off, which is inconvenient for construction and affects subsequent construction. Therefore, it is urgently needed to develop a new type of plastic thin-walled pipe.

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