Constraint ring for finished product steel strand bundle

Abstract

The invention discloses a constraint ring for a finished product steel strand bundle. The constraint ring is a hollow cylindrical sleeve, and a plurality of bosses and a plurality of grooves are uniformly arranged at intervals on the inner wall of the constraint ring along the radial direction; an inner hole of the constraint ring is assembled and sheathed at the end part of the finished product steel strand bundle which is formed by combing and arranging a plurality of single steel strands; a special extrusion device is used for extruding the outer diameter of the constraint ring along the axial direction of the constraint ring, and an axial process press mark is formed on an outer circle of the constraint ring. The constraint ring disclosed by the invention has the beneficial effects that the constraint ring adopts axial extrusion, the extrusion direction is consistent with the length direction of the constraint ring and the finished product steel strand bundle, the inner wall of the constraint ring is embedded into gaps between the single steel strands at an outer layer of the finished product steel strand bundle, the plurality of bosses on the inner wall of the constraint ring are used for wrapping the outer edges of the single steel strands at the contacted outer layer, the inner wall of the constraint ring is in arc surface contact with the outer edges of the single steel strands, the contact area is large, the bonding strength between the finished product steel strand bundle and the constraint ring is high, and the constraint ring and the finished product steel strand bundle can be firmly combined together.

Description

technical field [0001] The invention relates to a constraining ring used for fastening finished steel strand bundles in building construction. Background technique [0002] In the construction of roads and bridges, it is often necessary to thread multiple prestressed steel strands into the prestressed tunnel. In the past, a single steel strand was threaded one by one, which was inefficient and caused the gap between multiple steel strands. Easy to get tangled or crossed. Combing the prestressed steel strands into bundles and setting up a special traction head for dragging can significantly improve the efficiency of multiple steel strands passing through. [0003] figure 1 It is a schematic diagram of the structure of the finished steel strand harness by radially extruding and clamping the confinement ring in the prior art; figure 2 yes figure 1 right view of . [0004] Such as figure 1 , figure 2 As shown, in the prior art, the ends of a plurality of steel strands 1...

AI Technical Summary

Problems solved by technology

[0005] The disadvantages of the above technical solutions are: 1. The steel strand restraint ring adopts radial extrusion to press the inner wall of the restraint ring and the steel strand tightly together, and the extrusion direction is perpendicular to the length direction of the steel strand. There is still a gap between the steel strand bundle and the inner wall of the restraint ring, and the pressure between the steel strand bundle and the restraint ring is reduced

2. The confinement ring is radially extruded. To achieve a higher pressure, the deformation of the confinement ring is large after extrusion.

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