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Hollow pipe for concrete

A hollow tube and tube body technology, which is applied in the direction of formwork/formwork/work frame, building components, and on-site preparation of building components, which can solve the problems of high rigidity and the inability to form a well-shaped rib-equivalent two-way plate

Inactive Publication Date: 2007-04-11
邱则有
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But after applying it to the cast-in-place concrete hollow floor, since the tubular concrete at the center of the hard thin-walled pipe in the cast-in-place concrete floor has been evacuated, there are cast-in-place concrete ribs along the longitudinal direction of the pipe, while in the transverse direction due to the reinforced concrete It has been evacuated by the mandrel or components, and only two plugs are used as force transmission ribs. Therefore, it cannot bear the complex tension, pressure, shear force, torque, etc., and there is a large difference in rigidity between the two directions of the cast-in-place concrete hollow slab. However, it becomes the cast-in-place reinforced concrete hollow one-way slab, which cannot form the equivalent two-way slab with well-shaped ribs.

Method used

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Embodiment Construction

[0059] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0060] As shown in the accompanying drawings, the present invention includes a pipe body 1 and a pipe end cap. The two pipe end caps seal the two ends of the pipe body 1 to form a hollow tube with a closed cavity. It is characterized in that the pipe body 1 is provided with at least one Groove 3, the cross-section of the pipe body is quadrilateral, and the lower parts of both sides of the quadrilateral are equipped with longitudinally overhanging flange plates. Fig. 1 is a schematic structural diagram of Embodiment 1 of the present invention. In the accompanying drawings, 1 is a pipe body, 2 is a pipe end cap, and 3 is a groove. In each accompanying drawing, those with the same number have the same description. As shown in FIG. 1 , two pipe end caps 2 seal both ends of the pipe body 1 to form a closed hollow pipe. The pipe body 1 is provided with a plu...

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Abstract

The hollow pipe for concrete includes one pipe body and two end seals to block the ends of the pipe body to form one closed cavity. It features that the pipe body has at least one notch, quadrangular cross section, and two longitudinal outer stretched flange plates below the quadrangular pipe. The present invention is suitable for use in in-situ cast or pre-stressed reinforced concrete floor slab, roof, wall, foundation slab and bridge.

Description

[0001] This application is a divisional application of an invention patent application with an application date of June 19, 2003, an application number of 03143175.5, and a title of “A Hollow Tube for Concrete”. (1) Technical field [0002] The invention relates to a hollow pipe for concrete. (2) Background technology [0003] At present, in the existing technology, the hole-forming components of the cast-in-place concrete hollow floor are permanent mandrels, such as paper tubes, plastic tubes, metal bellows, mandrel lightweight materials, etc. These tubular mandrels or components are mainly considered to evacuate concrete , to reduce the weight of the floor. For example, the patent No. 99249755.8 applied by the applicant is a utility model patent for "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. Both ends of the tube are closed to form a closed cavity, and the cross section ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04B5/16E04B5/17E04B5/36E04G15/06
Inventor 邱则有
Owner 邱则有