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Small-diameter high-strength steel wire for prestressed concrete sleeper

A technology of high-strength steel wire and a 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 form sleeper, and the uneven size of the steel wire to be tensioned. The effect of distance transmission, reduction of stress loss, and improvement of automation level

Active Publication Date: 2020-10-16
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
  • Small-diameter high-strength steel wire for prestressed concrete sleeper

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 a prestressed concrete sleeper, comprising a steel wire body 1, the length of the steel wire body 1 is 2 to 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 1670 MPa; The middle part of the steel wire body 1 is provided with a spiral rib 11, the rib height of the spiral rib 11 is 0.275-0.33mm, and the cross section of the spiral rib 11 is rectangular; the two ends of the steel wire body 1 are provided with threads 12, and the length of the thread 12 ranges from 10 ~60mm, the specifications of thread 12 are M4.5~M8, and the pitch range of thread 12 is 0.5~1.5mm.

[0042] Specifically, the length of the steel wire body 1 in this embodiment 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 20...

Embodiment 2

[0067] refer to figure 1 and figure 2 , the present invention provides a kind of small-diameter high-strength steel wire for prestressed concrete sleeper, comprising steel wire body 1, the length of steel wire body 1 is 3m, the diameter of steel wire body 1 is 7.0mm, and the tensile strength of steel wire body 1 is 1800MPa; The middle part of 1 is provided with spiral rib 11, and the rib height of spiral rib 11 is 0.29~0.34mm, and the cross section of spiral rib 11 is rectangular; Both ends of steel wire body 1 are provided with thread 12, and the length of thread 12 is 30mm, thread 12 The specification is M7, and the pitch of thread 12 is 0.75mm. The above specifications and sizes can all 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 sleeper, 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 spiral rib 11, and the rib height of spiral rib 11 is 0.30~0.35mm, and the cross section of spiral rib 11 is rectangular; Both ends of steel wire body 1 are provided with thread 12, and the length of thread 12 is 40mm, thread 12 The specification is M7, and the pitch of thread 12 is 1.0mm. The above specifications and sizes can all 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 a prestressed concrete sleeper. The small-diameter high-strengthsteel wire for the prestressed concrete sleeper comprises a steel wire body; the length of the steel wire body is 2m-6m, and the diameter of the steel wire body is less than 8mm; threads are arrangedat the two ends of the steel wire body; a spiral rib is arranged in the middle of the steel wire body, and the rib height of the spiral rib is not larger than 0.35 mm; and the tensile strength of thehigh-strength steel wire is not less than 1670 MPa. According to the small-diameter high-strength steel wire for the prestressed concrete sleeper, the high-strength steel wire can reduce the using amount of steel bars in the sleeper, energy saving and emission reduction achieved, the automation level of sleeper manufacturing is improved. Due to the fact that the rib height of the spiral rib of the steel wire is not larger than 0.35 mm, on one hand, when concrete is poured and reaches a certain strength, the steel wire can achieve the self-anchoring effect through bond stress of the spiral riband the concrete, and on the other hand, due to the fact that the spiral rib is a low rib, when a train passes by in the service process of the steel wire, and long-distance transmission of stress can be ensured.

Description

technical field [0001] 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 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 and maintaining the direction, gauge and position of the rail. It bears various forces from the rail and then elastically transmits it to the ballast bed. Sleepers are divided into various forms such as 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 high-speed and large-capacity requirements of trunk railways. [0003] Prestressed steel wire is an important component of prestressed components such as prestressed concrete sleepers. Usually, concrete sleepers are de...

Claims

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Application Information

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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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