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Method for Horizontally Winding and Unwinding a Parallel Wire Strand

a technology of parallel wire strands and wire strands, which is applied in the direction of bridges, bridge structural details, transportation and packaging, etc., can solve the problems of difficult unwinding of cable strands from steel reels, cable strands giving birth to oval traumas, and loosening of cable strands, so as to avoid cable strand damage or injury or loss, increase the erection benefits and cable strand quality, and reduce labor intensity and operation time.

Inactive Publication Date: 2013-09-26
SHANGHAI PUJIANG CABLE +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides a method for efficiently winding and unwinding a parallel wire strand with high quality and low labor intensity. The method includes fixing a guide frame on the ground, using a fixed pulley and steel wire rope to wind the wire strand on the inner module, and driving the rotation platform to rotate the inner module and wire strands. The method also includes controlling the electric hoist to pull the steel wire rope and the hydraulic brake to lock the turning axle to prevent damage to the strands. The invention solves the "Hula-circles" effect problem and increases cable strand erection benefits and quality. The method is compact, regular, and can go with a swing, reducing labor intensity and operation time. The invention also increases automation, reduces labor intensity, and increases security. The shipping reel is simple and removable, saving manufacture and transportation costs.

Problems solved by technology

During the transportation of cable strands on steel reels to large bridge building site, cable strands could give birth to oval traumas from falling down shown in FIG. 1, owing to their deadweight.
Consequently the cable strands oval traumas from falling down therefore caused cable strand winding loosen and friction between cable strands generated by steel reel rotating.
While cable strands were winding along with steel reel rotating continually, this kind of trauma from falling down could result in so-called “Hula-circles” effect, in consequence it disturbed the original arrangement order and could be very difficult to unwinding cable strand from steel reel.
Furthermore, in unwinding cable strand the dragging and pulling forces suddenly made the loose cable strands to be tightened or loosened every now and then, which could aggravate the frictions between cable strands and scratch band on strand until breakage and make cable strand steel wires incoherent.
This not only brought unlimited inconvenience to assembly molding of main cable of suspension bridge, but also more seriously influence the time limit for a project.
Particularly the longer the cable strand, the more serious the “Hula-circles” developed, furthermore the longer the cable strand, the more difficult the remedy measures carried out, even could not carry out.
When the “Hula-circles” phenomena become serious, it will direct influence site construction schedule and cable strand quality.

Method used

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  • Method for Horizontally Winding and Unwinding a Parallel Wire Strand

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embodiment 1

[0029]A method for horizontally winding and horizontally unwinding a parallel wire strand upon a base of a cable reel for transport, storage or installation, a parallel wire strand made up of a plurality of tightly adjacent vertically and horizontally arranged parallel wires, the strand including at least a leading end fitting securing the ends of the wires together, comprising the steps of:

[0030](a) Performing the winding operation, the operation procedure is as follows:

[0031]As shown in FIG. 2, fix the guide frame 1 on the ground, the guide frame 1 is composed by the base 11, support frame 12, electric hoist 13, fixed pulley 14, steel wire rope 15, lifting mechanism 16, roller 17, the pressure sensor 181, speed encoder 182, altimeter encoder 183 and limit roller 19 as shown in FIGS. 3 and 4. Fix the base 1 on the ground and fix the support frame 12 and electric hoist 13 on the base 1. A fixed pulley 14 is equipped at the top of the support frame 12, also a steel wire rope 15 which...

embodiment 2

[0043]It is a method for horizontally winding and horizontally unwinding a parallel wire strand. The method includes winding strand and unwinding strand operations. During the winding strand the container 4 is composed by 6 support plates 41 and the top support rod 42. The six support plates 41 are aligned uniformly in the ring shape. There is a gap between the adjacent support plates 41, and the gap length is 100 percent of the width of support plate 41. The rest structure and method are the same to embodiment 1.

embodiment 3

[0044]It is a method for horizontally winding and horizontally unwinding a parallel wire strand. The method includes winding strand and unwinding strand operations. During the winding strand the container 4 is composed by 10 support plates 41 and the top support rod 42. The ten support plates 41 are aligned uniformly in the ring shape. There is a gap between the adjacent support plates 41, and the gap length is 80 percent of the width of support plate 41. The rest structure and method are the same to embodiment 1.

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Abstract

A method for horizontally winding and horizontally unwinding parallel steel wire strands for transport, storage or installation comprises the following steps: when performing the winding operation, a guiding frame (1) is mounted on the ground, a rotating platform is connected with a rotating shaft (21), the leading end of the wire stranded is passed through the guiding rollers (17) and then is fixed on an inner module (4), and the platform (2) is rotated around the shaft (21); when performing the unwinding operation, the guiding frame (1) is mounted on the ground and one end of the winded stranded wire is pulled out from the guiding rollers (17).

Description

FIELD OF THE INVENTION[0001]The present invention relates to a parallel wire strand consisting of a multiplicity of individual wires. More particular, the invention relates to horizontally winding and unwinding a parallel wire strand consisting of a multiplicity of individual wires onto and from a cable reel for fanning out and rearranging the wire strands for transport, storage or installation.BACKGROUND OF THE INVENTION[0002]The main cable strands are the chief bearing members of suspension bridge. The cable strand is made of high strength galvanized wire of 5 mm in diameter. Formerly specifications for the cable strand were available in 61 wires, 91 wires and 127 wires. At present the over-length large main cable strands reach 5000 m in length, in 169 wires of 5 mm diameter. The weight of a cable strand reaches 120 tons. Commonly the cross-section of cable strand is regular hexagon. Some special cable strands may be rectangular or other shapes. A cable strand is bound with compos...

Claims

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Application Information

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IPC IPC(8): B65H49/20
CPCE01D21/00B65H49/30B65H54/56E01D19/16B65H2701/36B65H49/20B65H57/14B65H49/00B65H54/00
Inventor LUO, GUOQIANGLI, GANGZHANG, HAILIANGZHU, JINLINGU, QINGHUAXIE, FEI
Owner SHANGHAI PUJIANG CABLE
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