Direct current railway steel rail flash butt welder for rapid pressure maintaining push protruding

Abstract

The invention provides a direct current railway steel rail flash butt welder for rapid pressure maintaining push protruding. The direct current railway steel rail flash butt welder comprises a frame (100), a movable frame (200), a fixed frame (300), a rail web clamping mechanism (400), a vertical electrode clamping mechanism (500), a horizontal steel rail adjusting mechanism (600) and a steel railwelding connector push protruding mechanism (700). By means of the direct current railway steel rail flash butt welder for rapid pressure maintaining push protruding, during welding upsetting, a connector is evenly stressed up and down, the bending moment caused by upsetting is eliminated, and accordingly straightness of a steel rail flash welding head is ensured. Through an independent push protruding mechanism and a special push protruding oil cylinder, push protruding in the state of vertical and horizontal connector displacement locking (connector pressure maintaining) is achieved, and the situation of connector pulling at the high temperature is avoided; and through a steel rail web connecting rod clamping mechanism, the steel rail web clamping efficiency is further improved, and meanwhile the clamping force can be adjusted by adjusting the connecting rod angle.

Description

technical field [0001] The invention relates to the field of rail welding in the railway industry, in particular to a direct-current railway rail flash butt welding machine for quickly maintaining pressure and pushing convex. Background technique [0002] At present, the steel rails used in rail transit are welded to length steel rails produced by steel mills and then laid on the line to form a seamless line. The most important method of rail welding is to use fixed rail flash welding equipment with high efficiency and stable joint quality to weld rails, so as to obtain reliable quality welded joints. [0003] Known fixed rail flash welding equipment connected by a bottom frame, see U.S. Patent US 5270514, its main feature is that the moving frame track of the welding machine is arranged at the bottom of the moving frame, and the rail to be welded is above the track, and the moving frame and The upper end of the static frame is in an open state. The structural disadvantage...

AI Technical Summary

Problems solved by technology

The disadvantages of this welding machine are: 1) the rail centering method of this welding machine is too simple, it is impossible to set the pre-arching amount, and it is difficult to realize the alignment of the working side of the rail head side; 2) it cannot realize the rail in the static frame Pushing (deburring) is completed under the condition of clamping the rail with the moving frame, or called pressure-holding and pushing; 3) Another disadvantage is the unbalanced three-phase (three-phase current amplitude is inconsistent), because the AC welding transformer can only be Single-phase use, so the current of one phase is relatively large, and the load of the other two phases is small, and the impact on the grid power is more serious; 4) Since the upper and lower double beam structures are located above and below the symmetrical line of the rail, when the actual rail end face deviates from the center line, the Under the action of welding upsetting force, an additional bending moment in the horizontal direction will be generated. Since the structure has poor bending resistance, it is prone to horizontal bending of welded joints

However, it takes more than 15 seconds for the push-up to wait for the centering arm and the electrode to be loosened and then the push-up knife passes through the electrode to reach the push-up position. Welded joints are prone to microscopic defects

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