A 15 strand rotation resisting steel wire rope and a method of manufacturing the same

Abstract

The application discloses a 15-strand rotation-resisting steel wire rope and a manufacturing method thereof. The 15-strand rotation-resisting steel wire rope comprises an inner layer rope and an outer layer rope, the twist direction of the inner layer rope is opposite to that of the outer layer rope, the twist direction of the inner layer rope is same twist, and the twist direction of the outer layer rope is alternate twist. The inner layer rope comprises a center strand and a first layer of rope strands, the first layer of rope strands is composed of five first steel wire strands arranged along the circumference of the center strand, and the adjacent two first steel wire strands are gap-fitted. The outer layer rope comprises a second layer of rope strands wrapped outside the inner layer rope, the second layer of rope strands is composed of nine second steel wire strands arranged along the circumference of the inner layer rope, and the adjacent two second steel wire strands are gap-fitted. The twist directions of the first steel wire strands, the center strand and the second steel wire strands are the same. The 15-strand rotation-resisting steel wire rope is smooth in surface and good in wear resistance. The inner layer rope and the outer layer rope are reversely twisted on a tandem type cage rope lapping machine, the inner and outer layer torques of the steel wire rope are offset to each other, and the rotation-resisting performance of the steel wire rope can be effectively enhanced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of steel wire rope, in particular to a 15-strand rotation-resistant steel wire rope and a manufacturing method thereof. BACKGROUND

[0002] In some use environments with high lifting height, the rotation-resistant performance of the steel wire rope is required to be high. The existing rotation-resistant steel wire rope mainly includes 18x7, 35(W)x7, 18xK7, 35(W)xK7 and the like. The 18x7, 35(W)x7, 18xK7, 35(W)xK7 and the like have good softness, but have more strands, small steel wire diameter and easy abrasion, which greatly reduces the service life of the steel wire rope. SUMMARY

[0003] The present application aims to provide a 15-strand rotation-resistant steel wire rope and a manufacturing method thereof to solve the problems in the prior art.

[0004] To achieve the above-mentioned purpose, the present application provides the following solution: the present application provides a 15-strand rotation-resistant steel wire rope, which comprises an inner layer rope and an outer layer rope. The lay direction of the inner layer rope is opposite to that of the outer layer rope, and the lay direction of the inner layer rope is the same direction lay, and the lay direction of the outer layer rope is the alternating lay.

[0005] The inner layer rope comprises a center strand and a first layer of rope strands wrapped outside the center strand. The first layer of rope strands is composed of five first steel wire strands arranged circumferentially around the center strand. The gap between adjacent two first steel wire strands is fitted, and the lay direction of the first steel wire strand is the same as that of the center strand.

[0006] The outer layer rope comprises a second layer of rope strands wrapped outside the inner layer rope. The second layer of rope strands is composed of nine second steel wire strands arranged circumferentially around the inner layer rope. The gap between adjacent two second steel wire strands is fitted, and the lay direction of the second steel wire strand is the same as that of the first steel wire strand.

[0007] Preferably, the internal arrangement structure of the center strand, the first steel wire strand and the second steel wire strand is the same, and each is composed of a center steel wire and six outer layer steel wires arranged circumferentially around the center steel wire. The adjacent two outer layer steel wires are in surface contact.

[0008] Preferably, the lay direction of the center strand, the first steel wire strand and the second steel wire strand is left lay.

[0009] Preferably, the inner layer rope is left same direction lay, and the outer layer rope is right alternating lay.

[0010] Preferably, the lay pitch of the center strand is 7.0-7.2 times the strand diameter, and the lay pitch of the first steel wire strand and the second steel wire strand is 8.3-8.5 times the strand diameter.

[0011] Preferably, the lay length of the outer layer rope is 6.5-6.7 times the rope diameter, and the lay length of the inner layer rope is 0.49 times the lay length of the outer layer rope.

[0012] A manufacturing method of a 15-strand rotation-resistant steel wire rope, specifically comprising the following steps:

[0013] Step one, wire drawing: drawing semi-finished steel wires on a straight wire drawing machine to produce finished steel wires;

[0014] Step two, strand twisting: twisting and compacting the center strand, the first steel wire strand and the second steel wire strand through a strand twisting device and a three-piece rolling tool in series for online production, and the strand compression rate is selected to be 13%-15%;

[0015] Step three, rope combining: reversely and once online twisting the twisted center strand, the first steel wire strand and the second steel wire strand on a series basket bar rope combining machine, and the first steel wire strand and the second steel wire strand both adopt a preforming process, and pass through a post-deformation device and a sizing device to produce the 15-strand rotation-resistant steel wire rope.

[0016] The 15-strand rotation-resistant steel wire rope has the following technical effects: compared with the existing 18x7, 35(W)x7, 18xK7 and 35(W)xK7 series steel wire ropes, the 15-strand rotation-resistant steel wire rope has fewer strands, larger steel wire diameter, better wear resistance, and the strand rope is compacted and treated, the surface is smooth, the contact area with a pulley or a drum is increased, and the wear resistance is further improved; the inner layer rope is twisted to the left in the same direction, the outer layer rope is twisted to the right in the opposite direction, and the inner layer rope and the outer layer rope are reversely and once online twisted on a series basket bar rope combining machine, so that the inner and outer layer torques of the steel wire rope are offset to each other, and the rotation resistance of the steel wire rope is effectively enhanced. The produced steel wire rope has good wear resistance and rotation resistance. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0018] Figure 1 Fig. 1 is a structural schematic diagram of the 15-strand rotation-resistant steel wire rope of the present application;

[0019] Figure 2 Fig. 2 is an enlarged view of the cross section of the center strand, the first steel wire strand and the second steel wire strand of the present application;

[0020] Figure 3 Fig. 3 is a one-time reverse twisting schematic diagram of the inner layer rope and the outer layer rope. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] like Figures 1-2 As shown, the 15-strand anti-rotation steel wire rope provided by the present invention includes an inner layer rope and an outer layer rope. The inner layer rope includes a central strand 1 and a first layer of rope strands. The first layer of rope strands wraps around the central strand 1 in the middle. The first layer of rope strands consists of five first steel wire strands 2. The five first steel wire strands 2 are evenly and tightly arranged circumferentially on the outside of the central strand 1 and form a closed loop. The outer layer rope is a second layer of rope strands twisted around the outside of the inner layer rope. The second layer of rope strands consists of nine second steel wire strands 3. The nine second steel wire strands 3 are arranged equidistantly in a circle circumferentially and close to the outside of the first steel wire strands 2.

[0024] The central strand 1, the first layer of steel wire strand 2, and the second layer of steel wire strand 3 have the same internal arrangement structure. They are formed by six outer layer steel wires 1.1, 2.1, and 3.1 arranged outside the central steel wires 1.0, 2.0, and 3.0, respectively, and tightly arranged in a circle around the perimeter and compacted.

[0025] The diameters of the center strand 1, the first wire strand 2, and the second wire strand 3 are all determined by the outer diameter of the 15-strand anti-rotation wire rope provided by this invention. After determining the required wire rope specifications, based on the outer diameter of the wire rope, and according to the above arrangement of wire strands, and the requirements that the lay length of the center strand is 7.0 to 7.2 times the strand diameter, the lay lengths of the first and second wire strands are both 8.3 to 8.5 times the strand diameter, the lay length of the outer layer rope is 6.5 to 6.7 times the rope diameter, and the lay length of the inner layer rope is 0.49 times the lay length of the outer layer rope, the diameters of the center strand 1, the first wire strand 2, and the second wire strand 3 are determined. Then, based on the wire strand diameters and the selected strand compression ratio, the diameters of the center wires 1.0, 2.0, and 3.0 and the outer wires 1.1, 2.1, and 3.1 that make up each type of wire strand are determined. Then, according to... Figure 2The shown arrangement combination, respectively, the center wire 1.0 and the outer layer wire 1.1, the center wire 2.0 and the outer layer wire 2.1, the center wire 3.0 and the outer layer wire 3.1 are twisted by the twisting equipment and the three-piece rolling tool in series, and a center strand 1, five first wire strands 2 and nine second wire strands 3 are produced according to the above structure, the wires in the strands are in surface contact state with the outer layer wires, and the twisting directions of the strands are all left twisting.

[0026] The manufacturing method of the 15-strand rotation-resistant steel wire rope is as follows:

[0027] Step one, wire drawing: the semi-finished wires are drawn on the straight-line wire drawing machine to produce the center wire 1.0 and the outer layer wire 1.1 required by the center strand 1, the center wire 2.0 and the outer layer wire 2.1 required by the first wire strand 2, and the center wire 3.0 and the outer layer wire 3.1 required by the second wire strand 3;

[0028] Step two, strand twisting: one center wire 1.0 and six outer layer wires 1.1, one center wire 2.0 and six outer layer wires 2.1, and one center wire 3.0 and six outer layer wires 3.1 are twisted by the twisting equipment and the three-piece rolling tool in series, the compression rate is selected as 13%-15%, and a center strand 1, five first wire strands 2 and nine second wire strands 3 are produced according to the above structure, the wires in the strands are in surface contact state with the wires, and the twisting directions of the strands are all left twisting; the twisting pitch of the center strand 1 is 7.0-7.2 times the strand diameter, and the twisting pitches of the first wire strand 2 and the second wire strand 3 are both 8.3-8.5 times the strand diameter;

[0029] Step three, rope twisting: as shown in the figure, Figure 3 the equipment is started, the first bar frame 4 and the second bar frame 5 rotate in opposite directions, the first bar frame 4 rotates left, the second bar frame 5 rotates right, the speed ratio of the two bar frames is 0.49, the center strand 1 is discharged from the flanged wheel 7 on the core frame 6, the five first wire strands 2 are discharged from the flanged wheel 8 on the first bar frame 4, gathered in the pressure line shoe 10 through the pre-deformer 9 to form a shape, and then formed into the inner layer rope 12 through the sizing device 11, the nine second wire strands 3 are discharged from the flanged wheel 13 on the second bar frame 5, gathered in the pressure line shoe 15 through the pre-deformer 14 and the inner layer rope 12 to form a shape, and then formed into the 15-strand rotation-resistant steel wire rope 18 through the post-deformation device 16 and the sizing device 17, and then pulled forward through the traction device 19 to be wound on the take-up flanged wheel 22 of the take-up device 21 through the line arranging device 20.

[0030] The above-described embodiments are merely intended to describe the preferred modes of the present application, and are not intended to limit the scope of the present application. Various modifications and improvements of the present application made by those skilled in the art, without departing from the design spirit of the present application, shall fall within the scope of the present application as defined by the claims.

Claims

1. A 15 strand rotation resisting steel wire rope characterized in that, The inner layer rope comprises a center strand and a first layer of rope strands wrapped outside the center strand, the first layer of rope strands is composed of five first steel wire strands arranged circumferentially along the center strand, the adjacent two first steel wire strands are gap fitted, and the first steel wire strands have the same twist direction as the center strand; The outer layer rope comprises a second layer of rope strands wrapped outside the inner layer rope, the second layer of rope strands is composed of nine second steel wire strands arranged circumferentially along the inner layer rope, the adjacent two second steel wire strands are gap fitted, and the second steel wire strands have the same twist direction as the first steel wire strands; The internal arrangement structure of the center strand, the first steel wire strand and the second steel wire strand is the same, and each is composed of a center steel wire and six outer layer steel wires arranged circumferentially along the center steel wire, and the adjacent two outer layer steel wires are in surface contact; The lay length of the center strand is 7.0-7.2 times the strand diameter, the lay length of the first steel wire strand and the second steel wire strand is 8.3-8.5 times the strand diameter; the lay length of the outer layer rope is 6.5-6.7 times the rope diameter, and the lay length of the inner layer rope is 0.49 times the lay length of the outer layer rope. The twist direction of the center strand, the first steel wire strand and the second steel wire strand is left twist.

2. The 15 strand rotation resisting wire rope of claim 1, wherein, The inner layer rope is left twist, and the outer layer rope is right twist.

3. The 15 strand rotation resisting wire rope of claim 2, wherein, Specifically comprising the following steps:

4. A method of manufacturing a 15 strand rotation resisting wire rope according to claim 1, characterized in that, Step one, wire drawing: the semi-finished steel wire is drawn on a straight line wire drawing machine to form a finished steel wire; Step two, strand twisting: the finished steel wire is twisted and compacted by a strand twisting device and a three-piece rolling tool in series to produce a center strand, a first steel wire strand and a second steel wire strand, and the strand compression rate is selected to be 13%-15%; Step three, rope combining: the twisted center strand, first steel wire strand and second steel wire strand are reversely and one-time on-line twisted on a series basket bar rope combining machine, the first steel wire strand and the second steel wire strand are preformed, and after the post-deformation device and the sizing device, the 15-strand anti-rotation steel wire rope is formed. ​

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