CN104631163A - Novel steel strand - Google Patents

Abstract

The invention provides a novel steel strand which comprises a body composed of one center wire and one edge wire. The center wire is a solid polished steel wire, the edge wire is an internally hollow annular steel wire, and the center wire can be just inserted into the center of the edge wire. The novel steel strand is characterized in that the surface of the body is provided with a plurality of continuous protruding ribs, the protruding ribs are in a weave shape or a fold line shape in the moving orientation, and 2-4 protruding ribs are arranged. The novel steel strand has the advantages that by the adoption of the technical scheme, the problems of slippage ad retraction between the center wire and the edge wire of the steel strand are solved, good mechanical performance of the steel strand is maintained, the steel strand body is made to have higher cohesive force, sliding is not generated easily, and the quality of prepressed concrete components is improved; meanwhile, the protruding rids are additionally arranged on the basis of the polished steel wire, the bond stress on cement is enhanced, and safety and strength in the using process are improved.

Description

A kind of Novel steel twisted wire

Technical field

The invention relates to a kind of Novel steel twisted wire.

Background technology

Compressor wire, owing to having high strength, becomes the important materials in bridge, railway construction, and compressor wire will ensure, with the bond stress of the wrappages such as cement, in use could give full play to the effect of compressor wire so in use.

Existing prestressing tendon is substantially all made up of central hair and Bian Si, shortcoming is the cross section of central hair and Bian Si is all circular, hole between them is large, contact area between steel wire is less, the frictional force that effective contact produces is little, very easily produce core silk edge slippage retraction, core silk stress is caused to reduce or lose stress completely, constrain quality and the life-span of prestress wire, simultaneously, existing a lot of compressor wire surface is all smooth, bond stress is not enough, make concrete and steel wire bundle to agree with effect bad, be easy to the generation causing accident.

Summary of the invention

The object of the invention is to provide simple, the safe and reliable Novel steel twisted wire of a kind of structure.

The technical scheme of the invention is: a kind of Novel steel twisted wire, comprise the body be made up of a central hair and a Gen Biansi, wherein, central hair is solid plain steel wire, limit silk is the ring like steel wire of inner hollow, described central hair can insert the center of described limit silk just, and described body surface has some continuous print salient ribs, described salient rib move towards undulate or fold-line-shaped.

Described salient rib has 2 ~ 4.

The advantage that the invention has and good effect are:

Owing to adopting technique scheme, on the basis of bright steel wire, add the bond stress to cement, security when improve use and intensity, solve the slippage retraction problems between the central hair of steel strand wires and limit silk simultaneously, maintain the mechanical property that steel strand wires are good, make steel strand wires body have stronger cohesiveness, and be not easy to produce slip, improve prestressed concrete member quality.

Accompanying drawing explanation

Fig. 1 is the structural representation of the invention;

Fig. 2 is the sectional view of the invention along A-A line in Fig. 1.

In figure:

1, limit silk 2, salient rib 3, central hair

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 comprises the body be made up of a central hair 3 and a limit silk 1, wherein, central hair 3 is solid plain steel wire, limit silk 1 is the ring like steel wire of inner hollow, and central hair 3 can insert the center of limit silk 1 just, and compressor wire body surface has 2 ~ 4 continuous print salient ribs 2, the trend of salient rib 2 can be set to waveform, also can be set to fold-line-shaped.

During use, owing to adopting technique scheme, on the basis of bright steel wire, add the bond stress to cement, security when improve use and intensity, the structure of this kind of steel strand wires central hair and limit silk makes frictional force therebetween increase simultaneously, solve the slippage retraction problems between the central hair of steel strand wires and limit silk, maintain the mechanical property that steel strand wires are good, steel strand wires body is made to have stronger cohesiveness, and be not easy to produce slip, improve prestressed concrete member quality.

Above embodiment has been described in detail the invention, but described content is only the preferred embodiment of the invention, can not be considered to the practical range for limiting the invention.All equalization changes done according to the invention application range with improve, within the patent covering scope that still all should belong to the invention.

Claims (2)

1. a Novel steel twisted wire, comprise the body be made up of a central hair and a Gen Biansi, wherein, central hair is solid plain steel wire, limit silk is the ring like steel wire of inner hollow, described central hair can insert the center of described limit silk just, it is characterized in that: described body surface has some continuous print salient ribs, described salient rib move towards undulate or fold-line-shaped.

2. steel strand wires according to claim 1, is characterized in that: described salient rib (2) has 2 ~ 4.