CN211171368U - Superfine ultrahigh-strength steel wire rope strand - Google Patents

Abstract

A superfine ultrahigh-strength steel wire strand is formed by parallelly twisting a plurality of superfine steel wires with the diameter of 0.03-3.0 mm or twisting included angles in a small way, and the torsion angle of the steel wire strand is 0.5-10 degrees; the contact mode between the steel wires is a line contact mode; the porosity of the section of the steel wire rope strand is lower than 28%; the tensile strength of the steel wire is more than 2000 MPa. The superfine ultrahigh-strength steel wire rope strand has thinner cross section and smaller dead weight under the requirement of the same structure rope force; under the same structure load-bearing condition, the length of the cable strand is longer, and the spanning space is larger.

Description

Superfine ultrahigh-strength steel wire rope strand

Technical Field

The utility model relates to a steel wire cable strand field, in particular to superfine ultrahigh strength steel wire cable strand.

Background

The steel wire rope strand has wide application in the field of civil engineering and is used for structures such as bridge ropes, stadium inhaul cables and the like. The cable strand is the main bearing component of some bridge engineering and building structures.

In the aspect of the structure of the steel wire rope strand, the design is slightly different according to stress occasions, and the steel wire rope strand is generally a regular hexagon or a circular section of a parallel steel wire and a small-angle torsion angle; the venue stay is formed by twisting a plurality of layers of steel wires or can be called a stranded wire.

In terms of cable strand materials, the materials for forming the cable strand at present mainly comprise galvanized steel wires, zinc-aluminum alloy coated steel wires and the like, and the specification of the coated steel wires is mainly that

A series of,

The series, the conventional tensile strength is 1770-; the other type adopts a wire rope type with a twisted filament, and the highest strength grade in GB/T20118 and 2017 general technical conditions of the wire rope is 2160 MPa. Steel wire for pull rope of stadium

Mostly, the tensile strength is 1770MPa and 1860 MPa.

In the aspect of the function of the steel wire cable strand, the steel wire cable strand is mainly used for transmitting long-distance and permanent force or supporting the superstructure of a building, and the cable strand product meets the requirement of large span or space through targeted design.

In the aspect of a coating, the thickness of a steel wire coating in the existing cable strand is about 30-50 microns, after a plurality of steel wires are stranded, each independent coating can be used as an integral protection, but the coating area is high (about 0.6%), and the phenomena of material creep and slippage of a metal coating are prominent in service.

The design is according to space span, length, cable force demand, for the configuration steel wire diameter of strand, tensile strength, scale production.

Advantages and troubles: the rope products have the advantages of convenience in coiling and transporting, high strength and large-span force transfer, are attractive in appearance and convenient to construct in a prestressed structure, save materials, and gradually replace large steel structures in partial fields. However, in the application occasions with larger span, heavy load or lighter weight requirements, the cable strand with the long and thicker diameter (the cross section is larger), the self weight of the cable strand becomes a burden of the integral structure (such as a steel structure and a concrete frame), and the application and the cable force transmission of the larger span occasions are influenced.

Disclosure of Invention

The utility model aims to design a superfine ultrahigh-strength steel wire strand, which has thinner section and smaller dead weight under the requirement of the same structure of cable force; under the same structure load-bearing condition, the length of the cable strand is longer, and the spanning space is larger.

In order to achieve the above purpose, the technical scheme of the utility model is that:

a superfine ultrahigh-strength steel wire strand is formed by parallelly twisting a plurality of superfine steel wires with the diameter of 0.03-3.0 mm or twisting included angles in a small way, and the torsion angle of the steel wire strand is 0.5-10 degrees; the contact mode between the steel wires is a line contact mode; the porosity of the section of the steel wire rope strand is lower than 28%; the tensile strength of the steel wire is more than 2000 MPa.

Preferably, the tensile strength of the steel wire is 4500-5000 MPa.

Preferably, the outer surface of the steel wire is provided with a coating, and the total area of the coatings in the cross section of the steel wire accounts for 0.06-0.30% of the area of the cross section of the steel wire strand.

Preferably, the steel wire rope strand is externally provided with a protective sheath.

The utility model discloses a fine steel wire system cable, the diameter scope of steel wire:

the steel wire with ultrahigh strength is adopted, the tensile strength is more than 2000MPa, and the highest strength reaches 4500-5000 MPa.

The superfine ultrahigh-strength steel wire strand of the utility model is formed by twisting superfine steel wires in parallel (the torsion angle of the steel wire strand can be adjusted by 0.5-10 degrees according to the design); the contact mode between the steel wires is mainly a line contact mode; on the section of the strand, the steel wires are densely arranged, the section porosity of the superfine steel wire strand is reduced by 4-5% (calculated by replacing a steel wire strand with 5 mm), and the compactness is improved; by adopting the method, the plating layer proportion is reduced (0.06-0.30%), and the slippage caused by material creep in the service of the cable strand is reduced; the tensile strength of the steel wire is improved, so that the corresponding cable force is greatly improved by 1.3 times at most; under the requirement of the same structure cable force, the cable strand has thinner section and smaller self weight; under the same structure load-bearing condition, the length of the cable strand is longer, and the spanning space is larger.

Through adopting superfine superhigh intensity steel wire system cable, solved under large-span, heavy load, the lightweight requirement, current strand dead weight is slightly big, the not enough problem of convenience in the installation use, superfine superhigh intensity strand reduces strand dead weight (steel quantity) more than 50% respectively. The light-weight cable strand with different diameters and different cable forces can be manufactured.

The utility model has the advantages that:

because the number of the micro-wires participating in the cable making is huge, the micro-wire cable making adopts a mode of stranding first, which is beneficial to process control and convenient to implement, and can use thinner and stronger steel wires to make cable strands with different diameters and different cable forces.

The method for manufacturing the cable (bundle) by adopting the integrated micro-fine steel wires enables the micro-fine steel wires to be stranded and cabled according to a set form, if the phi 0.3mm4000MPa is used for replacing the phi 5mm2000MPa steel wire, the porosity of the micro-fine steel wire cable strand is reduced by 4%, the cable force is improved by more than one time at most, or the sectional area of the cable strand is reduced by more than 50% (under the same cable force), the compactness of the cable strand is improved, the creep sliding risk of a cable strand coating is reduced, and the spanning capability of the cable strand is enhanced. Under the equal cable force demand, can surely reduce the strand dead weight more than half promptly, be favorable to superstructure lightweight, reduce overall structure risk.

Drawings

Fig. 1 is a schematic cross-sectional view of an embodiment of the steel wire strand of the present invention.

Detailed Description

Referring to fig. 1, the superfine ultrahigh-strength steel wire strand 100 of the present invention is formed by twisting a plurality of superfine steel wires with a diameter of 0.03-3.0 mm in parallel or with a small included torsion angle, and the steel wire strand 100 has a torsion angle of 0.5-10 °; the contact mode between the steel wires is a line contact mode; the porosity of the section of the steel wire rope strand 100 is lower than 28%; the tensile strength of the steel wire is more than 2000 MPa.

Preferably, the tensile strength of the steel wire is 4500-5000 MPa.

Preferably, the outer surface of the steel wire is provided with a coating, and the total area of the coatings in the cross section of the steel wire accounts for 0.06-0.30% of the area of the cross section of the steel wire strand 100.

Preferably, the steel cable strand 100 is externally provided with a protective sheath 200.

Claims (5)

1. A superfine ultrahigh-strength steel wire strand is characterized by being formed by parallelly twisting or slightly twisting a plurality of superfine steel wires with the diameters of 0.03-3.0 mm, wherein the torsion angle of the steel wire strand is 0.5-10 degrees; the contact mode between the steel wires is a line contact mode; the porosity of the section of the steel wire rope strand is lower than 28%; the tensile strength of the steel wire is more than 2000 MPa.

2. The superfine ultrahigh-strength steel wire strand as set forth in claim 1, wherein the tensile strength of said steel wire is 4500-5000 MPa.

3. The superfine ultrahigh-strength steel wire strand as claimed in claim 1 or 2, wherein the outer surface of the steel wire is provided with a coating, and the total area of the coatings in the cross section of the steel wire accounts for 0.06-0.30% of the cross section area of the steel wire strand.

4. The superfine ultrahigh-strength steel wire rope strand as claimed in claim 1 or 2, wherein a protective sheath is arranged outside the steel wire rope strand.

5. The superfine ultrahigh-strength steel wire rope strand as claimed in claim 3, wherein a protective sheath is arranged outside the steel wire rope strand.

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