Novel pulling-type internal mold for prefabricated concrete board beam of expressway

Abstract

The invention discloses a novel pulling-type internal mold for a prefabricated concrete board beam of an expressway. The novel pulling-type internal mold comprises four first rotation shafts. Upper supporting mold plates and lower supporting mold plates are rotatably connected to the first rotation shafts, and every two first rotation shafts are used as a set. The novel pulling-type internal moldis divided into three parts, during demolding, the middle part is removed first, a second rotation shaft is passively rotated, then idler wheels fall on slide rails, a lower mold plate is separated from bottom concrete according to the principle of lever prizing, after the middle part is removed, the huge space of the middle is released, conditions are created for rotation folding and removal of the mold plates of the two sides, and the novel pulling-type internal mold is suitable for large and small blocks and good in technology capability and provides convenience for processing manufacture and construction application. An internal-external line is designed as the overlapping axis of the two sides, that is to say, the axis of the large-diameter part and the axis of a port are designed atthe same axis, the problems of structural defects and inconvenient operation caused by different internal and external axes are solved, internal and external rotation of the two sides keeps uniform, folding is smoothly performed, and demolding is quickly performed.

Description

technical field [0001] The invention relates to the technical field of road engineering, in particular to a new pull-type inner mold of a prefabricated expressway concrete slab girder. Background technique [0002] Generally, small and medium-sized highway bridges adopt plate girder structure, but in the prefabrication of small and medium-sized plate girders, the demoulding problem of the internal mold is more troublesome, and there are many problems. Difficulties in demoulding are often encountered, and what is even more difficult to demould The beam body is scrapped due to the mold, even if it is barely demoulded, the inner mold will be damaged and needs to be remade or repaired. It is very difficult to go in and clean up the fault. This problem has become one of the major obstacles to the prefabricated beam body. The original drawing inner mold is to divide the inner mold into two halves, one big and one small. When demoulding, shrink and fold the small half first. Pull ...

AI Technical Summary

Problems solved by technology

[0004] This application provides a new pull-type inner mold for prefabricated expressway concrete slab beams, which solves the problem that the traditional inner mold structure is not easy to demould, and the beam body is damaged due to various reasons such as scraping, bumping, topping, and jamming. question

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