Automatic centering and pressing device for bridging U-rib bottom plate

Abstract

The invention discloses a bridging U rib bottom plate automatic centering and pressing device which comprises a platform assembly, a trolley assembly and an overturning assembly, the platform assembly comprises a platform body and templates arranged on the two sides of the platform body, and the upper end of the platform body is fixedly connected with a plurality of annular sealing plates; the trolley assembly comprises two movable trolley frame bodies arranged in the sealing plate, the movable trolley frame bodies are of a door-shaped structure, sliding shafts are connected to the side walls of the movable trolley frame bodies, and the two ends of the sliding shafts penetrate through the movable trolley frame bodies and are connected with rolling wheels making contact with the sealing plate. A plurality of groups of hydraulic cylinders for centering and pushing are arranged, so that a U-rib bottom plate can be automatically centered and clamped; after centering and positioning, a hydraulic cylinder for pressing, centering and pushing can be used for pressing the U-rib bottom plate and prefabricating reversible deformation; when welding seams of most U-rib bottom plates are welded, a welding flux position form of transverse fillet welding needs to be adopted, so that the U-rib bottom plates can be overturned by a certain angle to be matched with a U-rib welding machine for use.

Description

technical field [0001] The invention relates to the technical field of bridge-building pressing devices, in particular to an automatic centering and pressing device for U-rib bottom plates used in bridge-building. Background technique [0002] The steel box girder is an important part of the bridge load-bearing structure. The steel box girder is generally an orthotropic steel bridge deck, which is mainly used to provide support and avoid bridge deformation. The steel box girder generally includes structures such as a top plate and a bottom plate, and the top plate and the bottom plate are generally welded by U ribs and the bottom plate. [0003] During the welding construction, the fixing method of segmented positioning welding is adopted. This fixing method is prone to deflection of the entire U-rib, and the positioning accuracy is not high; at the same time, in order to fix the U-rib, each side of each U-rib, each Temporary connection is made by a small piece of tack weld...

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Problems solved by technology

[0003] During the welding construction, the fixing method of segmented positioning welding is adopted. This fixing method is prone to deflection of the entire U-rib, and the positioning accuracy is not high; at the same time, in order to fix the U-rib, each side of each U-rib, each Temporary connection is made by a small piece of tack weld at an interval of 500-600mm. The length of tack weld is about 50mm, which has the characteristics of short length, small welding feet, large quantity, and low attention in manufacturing; due to the existence of tack weld, in the follow-up When the process is formally welded, the weld reinforcement at the positioning weld will be too high, which will affect the quality and appearance of the weld. Therefore, we propose an automatic centering and pressing device for U-rib bottom plates for bridge building to solve the above-mentioned problems. question

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