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Small-diameter high-strength steel wire for prestressed concrete sleeper and manufacturing method thereof

A technology of high-strength steel wire and manufacturing method, which is applied in the field of prestressed steel wire, can solve the problems of affecting the static load crack resistance and fatigue resistance of concrete sleepers, affecting the stress transfer of the whole model sleeper, and the uneven size of the steel wire to be stretched, so as to reduce the The effect of loss of stress, prolonging service life, and not easy to break

Active Publication Date: 2022-07-05
BEIJING TIEKE SHOUGANG RAIL TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the processing error of steel wires when cutting to length and pier head, the size of a group of steel wires to be stretched in a sleeper is not uniform. , which in turn affects the static load crack resistance and fatigue resistance of concrete sleepers

Method used

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  • Small-diameter high-strength steel wire for prestressed concrete sleeper and manufacturing method thereof
  • Small-diameter high-strength steel wire for prestressed concrete sleeper and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] refer to figure 1 and figure 2 , The present invention provides a small-diameter high-strength steel wire for prestressed concrete sleepers, comprising a steel wire body 1, the length of the steel wire body 1 is 2-6 m, the diameter of the steel wire body 1 is less than 8 mm, and the tensile strength of the steel wire body 1 is not less than 1670MPa; The middle of the steel wire body 1 is provided with a spiral rib 11, the rib height of the spiral rib 11 is 0.275-0.33 mm, and the cross section of the spiral rib 11 is rectangular; ~60mm, the specification of the thread 12 is M4.5~M8, and the pitch range of the thread 12 is 0.5~1.5mm.

[0042] Specifically, in this embodiment, the length of the steel wire body 1 is 2m, the diameter of the steel wire body 1 is 7.5mm, the tensile strength of the steel wire body 1 is 1700MPa, the length of the thread 12 is 20mm, the specification of the thread 12 is M8, and the thread 12 The pitch is 0.75mm.

[0043] The steel wire prepar...

Embodiment 2

[0067] refer to figure 1 and figure 2 , The present invention provides a small-diameter high-strength steel wire for prestressed concrete sleepers, comprising a steel wire body 1, the length of the steel wire body 1 is 3m, the diameter of the steel wire body 1 is 7.0mm, and the tensile strength of the steel wire body 1 is 1800MPa; The middle part of 1 is provided with a spiral rib 11, the rib height of the spiral rib 11 is 0.29-0.34mm, and the cross section of the spiral rib 11 is rectangular; The specification is M7, and the pitch of thread 12 is 0.75mm. All the above specifications and dimensions can achieve the effects mentioned in Embodiment 1.

Embodiment 3

[0069] refer to figure 1 and figure 2 , The present invention provides a small-diameter high-strength steel wire for prestressed concrete sleepers, comprising a steel wire body 1, the length of the steel wire body 1 is 4m, the diameter of the steel wire body 1 is 6.25mm, and the tensile strength of the steel wire body 1 is 1900MPa; The middle part of 1 is provided with a spiral rib 11, the rib height of the spiral rib 11 is 0.30-0.35mm, and the cross section of the spiral rib 11 is rectangular; The specification is M7, and the pitch of thread 12 is 1.0mm. All the above specifications and dimensions can achieve the effects mentioned in Embodiment 1.

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Abstract

The invention belongs to the technical field of prestressed steel wires, in particular to a small-diameter high-strength steel wire for prestressed concrete sleepers, comprising a steel wire body, the length of the steel wire body is 2-6 m, and the diameter is less than 8 mm; the two ends of the steel wire body are provided with threads; There is a spiral rib in the middle of the body, and the rib height of the spiral rib is not more than 0.35mm; the tensile strength of the high-strength steel wire is not less than 1670MPa. The high-strength steel wire of the invention can reduce the amount of steel bars in the sleeper, save energy and reduce emissions, and improve the automation level of sleeper manufacture. Since the rib height of the spiral rib of the steel wire is not more than 0.35mm, on the one hand, when the concrete is poured and the concrete reaches a certain strength, the steel wire can achieve self-anchoring effect through the gripping force of the spiral rib with the concrete. The rib is a low rib, which can ensure the long-distance transmission of stress when the train passes by during the service of the steel wire.

Description

technical field [0001] The invention belongs to the technical field of prestressed steel wires, and in particular relates to a small-diameter high-strength steel wire for prestressed concrete sleepers and a manufacturing method thereof. Background technique [0002] The sleeper is a kind of railway accessories. In the track structure, the sleeper plays the role of supporting the rail, maintaining the direction, gauge and position of the rail. It bears various forces from the rail and transmits it elastically to the track bed. Sleepers are classified into wooden sleepers, reinforced concrete sleepers and steel sleepers according to their materials. Concrete sleepers are currently the most widely used sleepers in my country, which can meet the requirements of high-speed and large-capacity trunk railways. [0003] Prestressed steel wire is an important component for making prestressed concrete sleepers and other prestressed components. Usually, concrete sleepers are designed ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21C1/02B21F11/00B21H3/04E04C5/02E04C5/08
CPCB21C1/02B21F11/00B21H3/04E04C5/02E04C5/08
Inventor 王继军张远庆王梦王舒毅尤瑞林赵海凤范佳谭振宇曹建伟
Owner BEIJING TIEKE SHOUGANG RAIL TECH CO LTD
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