A method for improving the twisting quality of large-sized single-strand wire ropes

Abstract

A method for improving the twisting quality of large-sized single-strand wire ropes, comprising the following steps: using a 6-strand or 8-strand wire rope with a diameter of 19 mm to 22 mm as the towing rope; after the required wires in the outer layer are twisted into a single-strand rope and the wire is taken up, reversely rotate the spool on the same wire twisting machine to recycle the single-strand rope onto the front spool, and then use the single-strand rope as the center to perform the next outer layer wire twisting to ensure that the wire ropes are always strung together towards one end, and the wire ropes in each layer do not go offline after being strung together; repeating the above process in a cycle to finally obtain a single-strand wire rope with the required diameter, without repeating the operation of taking the spool offline and turning it over; during the production of each layer, "breaking the strain" and turning over the wires, and using a sizing device. The present invention ensures that the stress state of the wire ropes in each layer is not damaged, the stress state of each wire in the rope is uniform, improves the consistency of the twisting quality of the single-strand wire rope throughout the whole length, reduces the labor intensity and the consumption of the head and tail wires of the rope.

Description

Technical Field

[0001] The present invention belongs to the technical field of metal products, and particularly relates to the production technology of single-strand wire ropes. Background Art

[0002] Single-strand ropes have high breaking tensile force, high elastic modulus and good non-rotating performance. Such wire ropes are widely used in large-scale buildings such as the construction of space truss suspension structures, the steel structure canopy of space cable-supported stadiums, and ship anchoring. They are high-value-added and high-tech products for construction, and have broad market prospects.

[0003] The production of large-sized single-strand wire ropes is difficult. For example, the thick wires and large elastic force bring great difficulties to production operations such as wire coiling and rope twisting. The more layers of wire ropes, the greater the production difficulty. According to the traditional production operation method, after each layer is produced, it needs to be lifted from the take-up reel to the pay-off tail reel for re-threading production. The labor intensity is high, and due to the cross-interchange of the rope head and tail during rope laying, the structure of the wire rope is damaged greatly, and the consumption of the wire at the head and tail of the wire rope is relatively high. Summary of the Invention

[0004] The present invention aims to solve the problem that the existing take-up spools only have the function of taking up wire, and adds the function of paying off wire to the take-up spools, so as to realize that the spool device has the dual functions of "taking up" and "paying off".

[0005] A method for improving the twisting quality of large-sized single-strand wire ropes includes the following steps:

[0006] Use a 6-strand or 8-strand wire rope with a diameter of 19 mm to 22 mm as the towing rope;

[0007] Bind the head according to the process requirements for each layer, bind it 3 times, each time with a length of 10D, where D is the diameter of the wire rope of the current layer, and the spacing is 100 mm; at the same time, process and fasten the steel sleeve according to the diameter of the wire rope of each layer;

[0008] When the wire rope is being produced, both ends of the wire rope are fixed by the towing rope, and the towing rope for each layer cannot be disassembled and is always retained at both ends of the wire rope; when the required wires for the outer layer are twisted into a single-strand rope and taken up, then reverse-rotate the spool on the same rope-twisting machine to recover the single-strand rope on the front spool, and then use the single-strand rope as the center to carry out the twisting of the outer-layer wires for the next time, so as to ensure that the wire rope is always laid towards one end, and the wire rope for each layer is not taken off the line after being laid;

[0009] Repeat the above process in a cycle until the single-strand wire rope with the required diameter is obtained, without the need to repeatedly take the spool off the line and turn it over;

[0010] After the production of the current layer, when the wire rope of this layer is wound onto the spool for the production of the next layer, it should be ensured that the stress state of the wire rope in each layer is not damaged, and the stress state of each wire in the rope is uniform, so as to finally make the physical twisting quality of the whole wire rope consistent throughout the length;

[0011] When producing each layer, a sizing device is used for "breaking the twist" and turning over the wires.

[0012] The beneficial effects of adopting the above technical solution are:

[0013] The present invention applies a single-strand wire of "1×265 - φ98mm". The minimum breaking force of the wire rope is 9346 KN, which is 1174 KN higher than the designed value, and the breaking force is significantly improved. Specific Embodiments

[0014] This embodiment applies a single-strand wire of "1×265 - φ98mm":

[0015] Embodiment 1

[0016] A method for improving the twisting quality of large-sized single-strand wire ropes includes the following steps:

[0017] Use a 6-strand wire rope with a diameter of 20 mm as the traction rope;

[0018] For each layer, tie the head according to the process requirements, tie 3 times, each time with a length of 10D, where D is the diameter of the wire rope of the current layer, and the spacing is 100 mm; at the same time, process and fasten the steel sleeve according to the diameter of the wire rope of each layer;

[0019] During the production of the wire rope, both ends of the wire rope are fixed by the traction rope. The traction rope of each layer cannot be disassembled and is always retained at both ends of the wire rope; when the required wires of the outer layer are twisted into a single-strand rope and the wire is wound up, then reverse-rotate the spool on the same wire-twisting machine to wind the single-strand rope onto the front spool, and then use the single-strand rope as the center to perform the next outer-layer wire twisting, so as to ensure that the wire rope is always twisted in one direction, and the wire rope of each layer does not go offline after being twisted;

[0020] Repeat the above process in a cycle to finally obtain a single-strand wire rope with the required diameter, without the need to repeatedly take the spool offline and turn it over;

[0021] After the production of the current layer, when the wire rope of this layer is wound onto the spool for the production of the next layer, it should be ensured that the stress state of the wire rope in each layer is not damaged, and the stress state of each wire in the rope is uniform, so as to finally make the physical twisting quality of the whole wire rope consistent throughout the length;

[0022] When producing each layer, a sizing device is used for "breaking the twist" and turning over the wires.

[0023] Embodiment 2

[0024] A method for improving the twisting quality of large-sized single-strand wire ropes, comprising the following steps:

[0025] Use an 8-strand wire rope with a diameter of 21 mm as the towing rope;

[0026] The remaining steps are the same as those in Example 1.

[0027] Example 3

[0028] A method for improving the twisting quality of large-sized single-strand wire ropes, comprising the following steps:

[0029] Use an 8-strand wire rope with a diameter of 19 mm as the towing rope;

[0030] The remaining steps are the same as those in Example 1.

[0031] Example 4

[0032] A method for improving the twisting quality of large-sized single-strand wire ropes, comprising the following steps:

[0033] Use a 6-strand wire rope with a diameter of 22 mm as the towing rope;

[0034] The remaining steps are the same as those in Example 1.

Claims

1. A method for improving the twisting quality of large - size single - strand wire ropes, characterized in that: The method includes the following steps: Use a 6 - strand or 8 - strand wire rope with a diameter of 19 mm to 22 mm as the towing rope; For each layer, bind the heads according to the process requirements, bind 3 times, each time with a length of 10D (D is the wire rope diameter of the current layer), and the spacing is 100 mm; at the same time, process and fasten the steel sleeve according to the wire rope diameter of each layer; During the production of the wire rope, both ends of the wire rope are fixed by the towing rope, and the towing rope of each layer cannot be disassembled and always remains at both ends of the wire rope; when the required steel wires of the outer layer are twisted into a single - strand rope and the wire is taken up, then reverse - rotate the spool on the same wire - twisting machine to recycle the single - strand rope onto the front - placed spool, and then use the single - strand rope as the center to perform the next outer - layer steel wire twisting to ensure that the wire rope is always twisted in one direction, and the wire rope of each layer does not go offline after being twisted; Repeat the above process in a cycle to finally obtain a single - strand wire rope with the required diameter, without the need to repeat the operation of taking the spool offline and turning it over; After the production of the current layer is completed, when the rope of this layer is taken up into the spool for the production of the next layer, it should be ensured that the stress state of the wire rope of each layer is not damaged, and the stress state of each steel wire in the rope is uniform, so that the physical twisting quality of the entire wire rope is consistent throughout; When producing each layer, a sizing device is used to "break the strain" and turn over the steel wires.