An automatic extraction device for bridge supports

Abstract

The invention relates to the technical field of extraction devices of bridge bearings, in particular to an automatic extraction device of a bridge bearing. A lower clamping device is arranged on a lower fixing plate, one end of a rotary device is fixedly connected with the lower fixing plate, the other end of the rotary device is fixedly connected with the bottom surface of a rotary plate, the upper surface of the rotary plate is fixedly connected with one end of a lifting device, the other end of the lifting device is fixedly connected with the bottom of an upper fixing plate, and an upper clamping device is disposed on the upper fixing plate. When the extraction device is used, the lower clamping device is fixed to a bridge bearing pinner in a clamped mode, the upper clamping device is lifted to the position of the bridge bearing through the lifting device, and the bridge bearing is clamped by the upper clamping device; then the rotary device is started to drive the bridge bearing to rotate by an angle, so that the bridge bearing extends out of the outer side of the bridge bearing pinner. The structure achieves automatic extraction of the bridge bearing, the labor intensity of workers is greatly reduced to a large extent, and great convenience is brought to replacement of the bridge bearing.

Description

technical field [0001] The utility model relates to the technical field of extracting devices for bridge supports, in particular to an automatic extracting device for bridge supports. Background technique [0002] One or two support points are placed at the contact between the bridge and the pier, that is, the bridge support. The function of the bridge support is to transmit various loads of the superstructure to the piers, to ensure the free deformation of the superstructure under the action of live load, temperature change, concrete shrinkage and creep, etc., so that the actual stress of the upper and lower structures fit the design purpose. When the larger pier is being constructed, if the downforce range is too large, it will cause uneven force on the bottom and uneven height. In order to avoid the above phenomenon, bridge supports are placed between the bridge and the pier. The commonly used bridge bearings are square or circular plate bridge bearings. The plate bridg...

AI Technical Summary

Problems solved by technology

[0003] The bridge bearing is in a humid and dark environment, it is easy to corrode, oxidize and deform, which will affect the levelness of the bridge and bring harm to the bridge. It needs to be replaced when it is too deformed; Apply lubricating oil, the bridge support needs to be taken out for maintenance

In the prior art, the method of replacing or maintaining the bridge support is to lift the bridge with a hydraulic jack, replace or maintain the bridge support, and then lower the jack, but due to the limitation of the jack, the lifting height will not be too high, and the work The personnel manually extract the bridge support through the clamping tool, which is labor-intensive, which brings difficulty to the replacement or maintenance of the bridge support

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