CN202401335U

CN202401335U - 1*7-phi18.9mm mine prestress steel strand

Info

Publication number: CN202401335U
Application number: CN2011205429496U
Authority: CN
Inventors: 王雅志; 朱树行; 王国良; 苏子波
Original assignee: TIANJIN METALLURGY STEEL WIRE & CABLE GROUP Co Ltd
Current assignee: TIANJIN METALLURGY STEEL WIRE & CABLE GROUP Co Ltd
Priority date: 2011-12-22
Filing date: 2011-12-22
Publication date: 2012-08-29
Anticipated expiration: 2021-12-22

Abstract

The utility model provides a 1*7-phi18.9mm mine prestress steel strand which is formed by a central filament and six edge filaments in a twisting manner, wherein the central filament is arranged in the center of the section of the prestress steel strand; and the six edge filaments are uniformly distributed on the periphery of the central filament; the diameter d0 of the central filament is greater than the diameter d of each of the edge filaments; the nominal diameter Dn of the prestress steel strand is 18.9mm, and the lay length S is 270mm. The mine prestress steel strand disclosed by the utility model has the effects that the 1*7-phi18.9mm steel strand can achieve 1820MPa high-strength and low-relaxation prestress, can greatly improve the carrying capacity, and can be synchronous with the international advanced level, so that such products meet the development requirements of the industries such as coal, railways, highways, water (nuclear) power, buildings and the like, excellent construction materials are provided, the construction efficiency is improved, the resources are saved and good social and economic benefits are created.

Description

The mining prestress wire of 1 * 7-Φ 18.9mm

Technical field

The utility model belongs to mining building iron material-prestress wire, the mining prestress wire of particularly a kind of 1 * 7-Φ 18.9mm.

Background technology

At present coal mining accident takes place frequently and present situation, especially colliery tunnel support, building, museum, the bridge moulding of the various shapes of building needs the actual conditions of big specification, high strength steel strand.The present prestress wire of a lot of specification kinds can not adapt to the demand in market, has satisfied not colliery tunnel support and has changed various architectural design needs.

Summary of the invention

For solving the problem that exists in the above-mentioned technology; The purpose of the utility model provides the mining prestress wire of a kind of 1 * 7-Φ 18.9mm; Satisfy the construction needs of colliery tunnel support and various building, museum, bridge moulding; Improve the quality of construction, promote the security performance that is used for colliery and building trade engineering.

For realizing above-mentioned purpose; The technical scheme that the utility model adopts provides the mining prestress wire of a kind of 1 * 7-Φ 18.9mm; Wherein: this prestress steel twist line structure is to be closed by a central hair and six limit skein silks to form; The cross section of this prestress wire is that the center has a central hair, and the central hair periphery is evenly equipped with six limit silks, central hair diameter d ₀Greater than limit filament diameter d, the nominal diameter D of this prestress wire _nBe 18.9mm, the lay pitch is 270mm.

The utility model effect is that the mining prestress wire of this 1 * 7-Φ 18.9mm can reach the 1820MPa high strength low relaxed prestress; Can significantly improve bearing capacity; With international most advanced level synchronously, make this series products satisfy industry developments such as coal, railway, highway, water (nuclear) electricity, building to provide the construction of high-quality to use material; Improve and build efficiency of construction, economize on resources, create good society and economic benefit.

Description of drawings

Fig. 1 is the high strength low relaxed prestress steel strand section structure sketch map of the utility model.

Among the figure:

D _n-steel strand wires nominal diameter (mm) d-steel wire diameter (mm) d ₀-central hair diameter (mm)

The specific embodiment

In conjunction with accompanying drawing the mining prestress steel twist line structure of 1 * 7-Φ 18.9mm of the utility model is explained.

The mining prestress wire of 1 * 7-Φ 18.9mm of the utility model is to be closed by a central hair and six limit skein silks to form, and the cross section of this prestress wire is that the center has a central hair, and the central hair periphery is evenly equipped with six limit silks, central hair diameter d ₀Greater than limit filament diameter d, the nominal diameter D of this prestress wire _nBe 18.9mm, the lay pitch is 270mm; Said central hair diameter is 1.031 times of limit filament diameter.

The mining prestress wire function of 1 * 7-Φ 18.9mm of the utility model is achieved in that

The steel wire raw material of the mining prestress wire of 1 * 7-Φ 18.9mm of the utility model select the cold and hot wire rod that rolls of control of high-quality, and wherein the sorbitizing tissue accounts for more than 75% of whole tissue, and fragility, plastic occluded foreignsubstance grade are not more than 2.0 grades.

The raw material wire rod is as follows technical:

Wire rod mechanical property dial plate bar diameter 13.0mm;

Initial strength >=1280MPa;

Percentage elongation>=10%L ₀=100mm;

The contraction percentage of area >=28%;

By above-mentioned raw materials through following process for making:

The limit silk: by the raw material of diameter 13.0mm through seven passes of drawing moulding: the single pass compression ratio is 17.5% to the maximum, total draught 76.5%;

Central hair: by the raw material of diameter 13.0mm through seven passes of drawing moulding: the single pass compression ratio is 17.5% to the maximum, total draught 75%;

Twist with the fingers a burst technology again: technological parameter is: the central hair diameter strengthens more than 2.5% than limit filament diameter;

Steel strand wires diameter of phi 18.9mm, tolerance is controlled at+0.40mm ,-0.20mm; The lay pitch is 270mm;

Carry out stabilization processes again.

The process wire mechanical property sees the following form:

Process wire mechanical property table

The finished product mechanical property sees the following form:

Finished product mechanical property table

Claims

1. mining prestress wire of 1 * 7-Φ 18.9mm; It is characterized in that: this prestress steel twist line structure is to be closed by a central hair and six limit skein silks to form; The cross section of this prestress wire is that the center has a central hair, and the central hair periphery is evenly equipped with six limit silks, central hair diameter d ₀Greater than limit filament diameter d, the nominal diameter D of this prestress wire _nBe 18.9mm, the lay pitch is 270mm.

2. the mining prestress wire of 1 * 7-Φ 18.9mm according to claim 1 is characterized in that: said central hair diameter is 1.031 times of limit filament diameter.