Cast-in-place box girder formwork lifting appliance

Abstract

The invention belongs to the technical field of formwork lifting appliances, and particularly relates to a cast-in-place box girder formwork lifting appliance. For the problems that the fixation stability is poor and the operation efficiency is low, the following scheme is put forward; the cast-in-place box girder formwork lifting appliance comprises a traction suspension frame and a traction mechanism fixed to the traction suspension frame; the traction mechanism comprises a traction fixed frame, traction steel ropes and a lifting ring; lifting holes are formed in the inner wall of the traction fixed frame; the inner wall of each lifting hole is connected in a bolting manner through the corresponding traction steel rope; the other end of each traction steel rope and the lifting ring are connected with each other in a bolting manner; and eight to twelve electromagnetic bases are symmetrically distributed on the outer wall of the bottom of the traction fixed frame at equal intervals. The lifting appliance is of a three-layer structure; the whole framework is fixed through electromagnetism, and the lifting appliance is more stable in the lift-up and put-down processes; the middle-layer structure can be integrated with the pouring operation and can be used in cooperation with a cast-in-place box girder to achieve the fixing and laying operation; fixed lifting appliances are on the lower layer, and by means of cross arm clamping connection, the specification can be regulated so that the cast-in-place box girder formwork lifting appliance can be suitable for different box girder specifications; the cooperation efficiency of the three-layer structure is high; and in the lifting process, regulation is convenient and fast, and adaptability is better.

Description

technical field [0001] The invention relates to the technical field of formwork hangers, in particular to a cast-in-place box girder formwork hanger. Background technique [0002] The cast-in-place bridge is a kind of beam in bridge engineering. It is hollow inside and has flanges on both sides of the upper part, which is similar to a box, hence the name. Single box, multi-box, etc. The box girder of reinforced concrete structure is divided into prefabricated box girder and cast-in-place box girder. The prefabricated box girder combined with the bridge erecting machine can be erected after the completion of the substructure, which can speed up the progress of the project and save the construction period; the cast-in-place box girder is mostly used for large continuous bridges. [0003] A spreader is a device for hoisting heavy objects in a hoisting machine. The most commonly used spreader for lifting finished items is the hook, and there are other lifting rings, lifting s...

AI Technical Summary

Problems solved by technology

[0004] The formwork hangers of the existing cast-in-place box girders are all transferred and fixed by the gantry frame. The fixed hangers on the gantry frame are all pressure-type, and the ends of some box girders will be fixed unstable, resulting in Partial detachment affects the stability of the overall transfer, and the overall loading and unloading is more complicated and the operating efficiency is lower

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