Plastic thin-wall tube

Abstract

A plastic thin wall tube includes a ring thin wall tube and a closer board closing the end of the tube to form a close hollow thin wall tube characterizing that said tube is spliced by a rolling a sheet to a ring, the spliced parts are connected by a connector to form a longitudinal strip, in which, the connector is composed of a male post and a female hole and the male post is plug into the female hole.

Description

(1) Technical field [0001] The invention relates to a plastic thin-walled pipe. (2) Background technology [0002] At present, in the prior art, the hole-forming member of the cast-in-place reinforced concrete hollow slab is a permanent mandrel, such as a paper tube, a plastic tube, a metal bellows, and a mandrel made of lightweight materials. These tubular mandrels or components are mainly considered to evacuate the concrete and reduce the weight of the hollow slab. For example, the patent No. ZL99249775.8 applied by the applicant is a utility model patent named "fiber-reinforced thin-walled tube for filling cast-in-place reinforced concrete". It consists of a hard thin-walled tube and plugs at both ends. The two ends of the hard thin-walled tube are closed to form a closed cavity. The hard thin-walled tube wall is composed of a carcass and a cementing material. The carcass can be glass fiber or carbon fiber or organic fiber or non-woven fabric or fiber For braided fabric...

AI Technical Summary

Problems solved by technology

[0004] The solution of the present invention is based on the prior art, including an annular thin-walled pipe body and a sealing plate, and the sealing plate closes the pipe end of the annular thin-walled pipe body to form a closed hollow thin-walled pipe, which is characterized in that The annular thin-walled pipe body is made of a piece of plate rolled into a circular splicing. The splicing parts are connected to each other by connecting pieces to form a longitudinal splicing strip. The connecting piece is a connecting piece formed by a male post and a female hole. The male post is inserted into the female hole for connection. The supporting rod ring, the supporting ring, the supporting rod or the supporting plate are provided with a socket notch, and the pipe wall at the socket notch is provided with a reinforcing rib or a positioning block, and is superposed and embedded with the socket notch. In this way , the socket notch is superimposed and embedded with the reinforcing rib or the positioning block, and the support rod ring, support ring, support rod or support plate are firmly embedded and fixed, and the combination with each other is stable and reliable, and it is not easy to move, ensuring that the plastic The quality of the thin-walled tube makes the plastic thin-walled tube less prone to deformation or damage during transportation, stacking, handling and application installation, and its integrity is better. Since the annular thin-walled tube is rolled into a ring by a plate When the thin-walled pipe is assembled on the construction site, the components are simple, the preparation work is less, and the assembly is easy, so it has the characteristics of simple structure, easy production, and low cost; As a result, when the plates are assembled into a thin-walled tube, the connection is more convenient, which is beneficial to reduce the production cost of the thin-walled tube, thereby solving the problems in the prior art and achieving the goal of the present invention. In addition, the thin-walled pipe also has the characteristics of convenient handling, low transportation costs, high strength, and convenient construction and application. It is suitable for hollow slabs, hollow floors, roofs, etc. of various cast-in-place reinforced concrete or prestressed reinforced concrete It can be used in foundation slabs, walls and vierendeel bridges, especially for hollow girderless floors.

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