Tractor for finished steel strand and threading method of finished steel strand

Abstract

The invention discloses a tractor for a finished steel strand and a threading method of the finished steel strand. The tractor comprises a hoop, a mandrel, a threaded connection sleeve and a traction pull ring. One side of the mandrel is inserted in the center of the finished steel strand, the other side of the mandrel is arranged at one end of the threaded connection sleeve, the other end of the threaded connection sleeve is arranged at one end of the traction pull ring, the other end of the traction pull ring is provided with a pull ring connected with traction equipment, the hoop is arranged on the end portion of the finished steel strand in a sleeved mode, and the size of the periphery of the tractor is smaller than the inner diameter of a construction hole channel. The threading method includes the steps: (1) braiding the finished steel strand, (2) sleeving mark plates at the two ends of the finished steel strand, (3) inserting the conical end of the mandrel into the center of the finished steel strand and squeezing the hoop, and (4) connecting the mandrel and the traction pull ring with the two ends of the threaded connection sleeve respectively. The tractor and the threading method have the advantages that the tractor is high in connecting strength and convenient to replace, winding and torsion among steel strand bodies are avoided, and the finished steel strand is threaded out of a corrugated tube of the construction hole channel effectively and safely.

Description

technical field [0001] The invention relates to a tractor for a finished steel strand bundle and a threading method thereof. Background technique [0002] In the construction of buildings, roads and bridges, it is necessary to straighten out multiple prestressed steel strand bundles and penetrate them into the prepared prestressed tunnels, that is, corrugated pipes. When the finished steel strand bundle (also known as "combed bundle") is passed through the corrugated pipe, a special tractor needs to be set at the front end of the finished steel strand bundle. The quality of the structure design of the tractor and the convenience of application have a great influence on the quality of the construction. [0003] Chinese utility model patent 201120371131.2 discloses a threader for combing steel strands. The threader includes a threading seat and a threading head. The outer wall of the threading seat is threaded. The threading head includes a front cone and a rear end. The end...

AI Technical Summary

Problems solved by technology

[0004] The above patents in the prior art have the following deficiencies: 1. There is a special threading head between the threading seat and the suspension ring. The threading head is a cone at the front end and a hollow cylinder at the rear end, and the corresponding structure has internal threads. inconvenient

2. At the construction site, it is necessary to connect the threading head to the threading seat first, and then connect the threading ring to the hollow cylinder at the rear end of the threading head. The construction steps are relatively cumbersome

3. The threading head and the threading ring need to be made into different specifications according to the number of steel strands. In this way, a set of threading head and threading ring of different specifications must be prepared at the construction site, which is inconvenient to use.

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