Tensioning equipment for high-speed railway track slab pre-tensioning assembly line production line

Abstract

Disclosed is a tension release device for a production line with pipelining units for a pre-tensioned high-speed railway track slab, the device comprising four lifting pedestals (9) arranged along the periphery of a track slab mould (17), wherein reinforcing steel bar tension release devices (3) are arranged on the lifting pedestals (9); and each reinforcing steel bar tension release device (3) comprises a tension release power device, a transmission gearbox (20) connected to the tension release power device, and a tension release connection sleeve (18) connected to an output shaft of the transmission gearbox (20). A hydraulic motor is used as the tension release power device. The overall structure is simple, and the tension release devices (3) are arranged in one-to-one correspondence with tension rods, so that the tension release operation is fast and reliable, and when it is difficult to repair a certain tension release device (3) when a failure occurs, the device can be directly replaced, which is convenient and simple, can save time, and has low maintenance costs.

Description

technical field [0001] The invention relates to a prefabricated reinforced concrete slab stretching steel bar tensioning device, in particular to a high-speed railway track slab pretensioning assembly line production line tensioning device. Background technique [0002] In the prior art, there are mainly two kinds of stretching processes for producing ballastless track slabs of high-speed railways by pre-tensioning method. One is the stretching process of pit-type production of track slabs. Several tension rods on the same side are connected and fixed by tensioning steel beams. Finally, the oil cylinder drives the steel beam to stretch the tension rod so that the lock nut is separated from the side mold of the mold, and then the lock nut is manually loosened and the steel beam is removed, and the tension rod is completely separated from the steel bar to realize the tension. This method is relatively extensive, with a lot of manual intervention, high labor intensity, and low ...

AI Technical Summary

Problems solved by technology

This motor-driven method directly affects the synchronization of the tensioning process of multiple tension rods and lock nuts due to the multi-stage multi-position gear transmission gap superposition effect, and one power motor drives at least two tension rods through a complex gear transmission. The work of a tensioning connection sleeve requires sufficient power of the motor and high precision of the transmission mechanism, which will increase the cost of the equipment.

Moreover, the output torque of the motor drive is too small, which cannot guarantee the reliability of the tension, and there is a quality risk in the track plate.

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