Prestressed track slab reinforcement tensioning machine

Abstract

The invention discloses a prestressed track slab steel bar tensioning machine, which includes a tensioning frame, and the tensioning frame is slidably connected with two opposite sides of the track slab mould, which are synchronously lifted and lowered by a power mechanism. The tensioning sliding frame is connected with a tensioning combination frame driven by a combination power mechanism to slide along the inside and outside of the tensioning frame, and the tensioning combination frame is connected with a frame that can lean against the track plate mold. Backing against the rod, the two opposite tensioning combined frames are equipped with a tensioning frame driven by the tensioning power mechanism. The inner end of the tensioning frame is provided with a fixed tensioning claw for the special-shaped nut of the tensioning rod on the track plate mold to extend into. , the tension frame is connected with a tension stress monitoring device, and the tension frame is rotatably connected with a drive rotary sleeve driven by a locking power device, and the rotation of the drive rotary sleeve drives the lock nut on the tension rod to rotate and lean against the track The side walls of the plate mold. The invention has the advantages of effectively ensuring the production quality of the track slab and improving labor efficiency.

Description

technical field [0001] The invention relates to a prestressed track slab reinforcement tensioning machine. Background technique [0002] At present, with the continuous development of my country's high-speed railway construction level, ballastless track structure is widely used. In order to improve the structure type of ballastless track suitable for different operating conditions and provide strong technical support for the "going out" development strategy of my country's high-speed railways, the Ministry of Railways organized relevant units to independently develop the CRTSⅢ slab ballastless track structure. [0003] During the production process of CRTSⅢ type track slab (prestressed track slab), the following process steps need to be carried out. Firstly, the mold should be cleaned to ensure the appearance quality of the track slab concrete. After the formwork is cleaned, a layer of release agent should be evenly sprayed; Installation and lifting of pre-embedded casing, ...

AI Technical Summary

Problems solved by technology

That is to say, the tensioning machine needs to complete two tasks, tensioning and locking the steel bar. First, the end of the steel bar is connected to the tension rod (the two are combined and pre-tensioned through the initial tension process), and the end of the tension rod is a special-shaped nut. During the tensioning process, the joint head of the tensioning machine needs to grasp the special-shaped nut. The existing tensioning machine cannot achieve fast and accurate clamping, so the labor efficiency is low; secondly, in the locking process, it is necessary to connect the tension rod with The outer side of the track slab mold is fixed to keep the steel bars prestressed. The existing tensioning machine cannot achieve the above fixing, so it is easy to cause the problem of inconsistent prestress of multiple steel bars, thereby reducing the production quality of the track slab.

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