CN203639738U - Novel prestress die-drawn steel stranded wire - Google Patents

Abstract

The utility model belongs to the technical field of metal wires and particularly relates to a novel prestress die-drawn steel stranded wire. The novel prestress die-drawn steel stranded wire consists of three steel wires, wherein the sectional shapes of the three steel wires are the same and are similar to isosceles triangles of which the top angles are 120 degrees; the three steel wires form the die-drawn steel stranded wire with an equilateral triangle section. The novel prestress die-drawn steel stranded wire has the advantages that pores among the three steel wires are small; meanwhile, the periphery of the prestress steel stranded wire is wedge-shaped; after the prestress die-drawn steel stranded wire is embedded into concrete, the bonding strength between the concrete and the prestress steel stranded wire is high, the concrete has low possibility of falling off, and the overall tensile strength is greatly improved; furthermore, the service life is prolonged.

Description

A kind of novel pre-stressed die drawing steel strand

Technical field

The invention relates to a kind of novel pre-stressed die drawing steel strand for prestressed concrete reinforcement.

Background technology

Existing prestress die drawing steel strand is all made up of central hair and Bian Si, shortcoming is that the cross section of central hair and Bian Si is all circular, hole between them is large, and contact area between steel wire is less, and the frictional force that effectively contact produces is little, very easily produce core silk limit portion slippage retraction, cause core silk stress reduce or lose stress completely, restricted quality and the life-span of prestress wire, simultaneously, the steel strand wires that form are all light faces, have reduced steel strand wires and concrete bond stress.

For this reason, in recent years, people are devoted to the improvement to prestress wire always, try hard to improve steel strand wires and concrete combination effect.

Summary of the invention

The object of the invention is to provide a kind of simple in structure, safe and reliable novel pre-stressed die drawing steel strand.

A kind of novel pre-stressed die drawing steel strand, is made up of three steel wires, and the cross sectional shape of described steel wire is the isosceles triangle that drift angle is 120 degree, and the described die drawing steel strand of formation is approximate equilateral triangle.

Advantage and good effect that the invention has are: the hole between three steel wires is little, the triangular shaped strand structure forming is stable, between steel wire and steel wire, be difficult for sliding, the periphery of prestress wire is wedge-like simultaneously, embed in concrete, make concrete and prestress wire adhesion strength large, concrete is not easy to come off, entirety tensile strength can strengthen greatly, has extended its service life simultaneously.

Brief description of the drawings

Fig. 1 is the structural representation of the invention;

Fig. 2 is the cross sectional representation of the invention;

In figure: 1, steel wire

Detailed description of the invention

Below in conjunction with the drawings and the specific embodiments, the invention is described further.

As depicted in figs. 1 and 2, the invention is formed by three steel wire 1 twistings, and the cross sectional shape of described steel wire is the isosceles triangle that drift angle is 120 degree, and the described die drawing steel strand of formation is approximate equilateral triangle.When use, because the hole between three steel wires 1 is little, the triangular shaped strand structure forming is stable, between steel wire and steel wire, be difficult for sliding, the periphery of prestress wire is wedge-like simultaneously, embeds in concrete, make concrete and prestress wire adhesion strength large, concrete is not easy to come off, and overall tensile strength can strengthen greatly, has extended its service life simultaneously

Above embodiment has been described in detail the invention, but described content is only for the preferred embodiment of the invention, can not be considered to the practical range for limiting the invention.All equalization variation and improvement etc. of doing according to the invention application range, within all should still belonging to the patent covering scope of the invention.

Claims (1)

1. a novel pre-stressed die drawing steel strand, is made up of three steel wires, it is characterized in that: the cross sectional shape of described steel wire is the isosceles triangle that drift angle is 120 degree, and the described die drawing steel strand of formation is approximate equilateral triangle.

Images