Hydraulic steel rail stretcher for railway

Abstract

The invention relates to the technical field of rail transit equipment, and discloses a hydraulic steel rail stretcher for a railway. The hydraulic steel rail stretcher comprises two rail clamping devices, through holes are formed in the left side and the right side of the rail clamping devices; a rotating shaft is movably sleeved with the rail clamping devices, a rotating piece is fixedly connected to the middle of the rotating shaft, a hydraulic cylinder is movably sleeved with one end of the rotating piece, a clamping block is fixedly connected to the other end of the rotating piece, and supporting ejector rods movably sleeved with the rail clamping device are arranged on the upper portion and the lower portion of one side of the clamping block. With arrangement of a correction device,when the rail clamping devices clamp a steel rail and then stretch the steel rail, two groups of symmetrical support rods on two sides are driven to synchronously move inwards; the trapezoidal block is forced to slide towards one side of the steel rail by extruding the trapezoidal block through the inclined surface of the pressing rod, the spring and the top plate are extruded, and the two sections of steel rails to be butted are corrected through extrusion of the top plates on the two sides so that the centering property of the two sections of steel rails is ensured, and subsequent steel railmachining work is facilitated.

Description

technical field [0001] The invention relates to the technical field of rail transit equipment, in particular to a hydraulic rail stretching machine for railways. Background technique [0002] The hydraulic rail tensioner is mainly used in the rail seamless stress release and long rail laying on the railway. In the stress release operation of the seamless line, after the rail fastener is loosened, when the temperature of the rail reaches the standard requirement, the stress of the rail can be free. In the released state, apply a pre-calculated pulling force to ensure the gap between the rails. The specific operation is: after the whole machine is installed on the rail, hit the inclined iron at one end with a hammer to confirm the compression. Use the hydraulic pump station to adjust the length of the stretching cylinder, and then press the other end of the fixture with the inclined iron, and use the hydraulic cylinder station to directly drive the piston to move. As the tensi...

AI Technical Summary

Problems solved by technology

[0003] But the existing hydraulic rail stretching machine still has the following deficiencies in the actual operation process: first, the traditional hydraulic rail stretcher mainly relies on the friction between the inclined iron and the rail to clamp the rail, and the stretching action During the process, use the cooperation of the clamp and the inclined iron to slowly clamp and clamp the rail, so that the sliding friction between the inclined iron and the rail gradually becomes static friction, and the inclined iron is a vulnerable part, and the inclined iron faces the rail. The surface is easy to cause excessive wear during the stretching process, which will greatly reduce the friction force, and the situation that the friction resistance is less than the pulling force of the hydraulic cylinder will cause the inclined iron to move together with the inclined iron seat, that is, slipping will occur, and the rail cannot be clamped to achieve pulling Therefore, it is necessary to replace the inclined iron frequently; secondly, when the traditional rail tensioner is stretching the rail, it is difficult to ensure that the two sections of the rail have good alignment, that is, after the stretching is completed, the joints of the two ends of the rail Misalignment is prone to occur, resulting in the inability to carry out subsequent processing and repair work on the rail, and it needs to be re-aligned for stretching, which is time-consuming and laborious

Images