阅读说明：本技术 一种电梯用钢丝绳及其制作方法 (Steel wire rope for elevator and manufacturing method thereof ) 是由 杨岳民 高正凯 惠铭 于 2021-06-30 设计创作，主要内容包括：本发明提供一种电梯用钢丝绳及其制作方法,该钢丝绳包括至少三根绳芯、内层股和外层股,各所述绳芯加捻构成绳芯股,组成所述内层股和所述外层股的钢丝上包覆有一层内保护层,所述内层股与绳芯股之间形成内填充层,所述外层股与所述内层股间形成外填充层,所述内填充层及所述外填充层内填充有阻水纱和构成绳芯的绳芯单丝,外层股外包裹有一外保护层,各所述绳芯间填充有阻水纱；外保护层与绳芯单丝的原料包括：聚醚砜、双酚A型环氧树脂、高碳钢粉、增韧纤维、纳米石墨烯、固化剂及消泡剂。本电梯用钢丝绳经过复合材料制备、绳芯制备、复合钢丝制备、捻股、合绳及外保护层形成步骤制得,其具有优良的整体性能,结构与性能稳定,实用性高。(The invention provides a steel wire rope for an elevator and a manufacturing method thereof, wherein the steel wire rope comprises at least three rope cores, an inner layer strand and an outer layer strand, each rope core is twisted to form a rope core strand, steel wires forming the inner layer strand and the outer layer strand are coated with an inner protective layer, an inner filling layer is formed between the inner layer strand and the rope core strand, an outer filling layer is formed between the outer layer strand and the inner layer strand, water-blocking yarns and rope core monofilaments forming the rope cores are filled in the inner filling layer and the outer filling layer, an outer protective layer is coated outside the outer layer strand, and water-blocking yarns are filled between the rope cores; the raw materials of the outer protective layer and the rope core monofilament comprise: polyether sulfone, bisphenol A epoxy resin, high-carbon steel powder, toughening fibers, nano graphene, a curing agent and a defoaming agent. The steel wire rope for the elevator is prepared by the steps of preparing a composite material, preparing a rope core, preparing a composite steel wire, stranding, rope combining and forming an outer protective layer, and has excellent overall performance, stable structure and performance and high practicability.)

1. A steel wire rope for an elevator is characterized by comprising at least three rope cores, an inner layer strand wrapped around the rope cores and an outer layer strand wrapped outside the inner layer strand, wherein the rope cores are twisted to form rope core strands, a steel wire forming the inner layer strand and the outer layer strand is coated with an inner protective layer, an inner filling layer is formed between the inner layer strand and the rope core strands, an outer filling layer is formed between the outer layer strand and the inner layer strand, water blocking yarns and rope core monofilaments are filled in the inner filling layer and the outer filling layer, an outer protective layer is wrapped outside the outer layer strand, and water blocking yarns are filled between the rope cores;

the rope core monofilament comprises the following raw materials: polyether sulfone, bisphenol A epoxy resin, high-carbon steel powder, toughening fibers, nano graphene, a curing agent and a defoaming agent;

the outer protective layer is made of the same material as the rope core monofilament.

2. The steel wire rope for an elevator according to claim 1, wherein said inner protective layer is an ultra-high molecular weight polyethylene inner protective layer.

3. The steel wire rope for an elevator according to claim 2, wherein the raw material of the core filament comprises, in mass fraction: 2-6% of polyether sulfone, 30-40% of bisphenol A epoxy resin, 10-20% of high-carbon steel powder, 10-20% of toughening fibers, 15-25% of nano graphene, 1-5% of a curing agent and 1-5% of a defoaming agent.

4. The steel wire rope for an elevator according to claim 1, wherein the outer protective layer is uniformly formed at the outer periphery thereof with anti-slip grooves.

5. The steel wire rope for an elevator according to claim 4, wherein the shape of the outer protective layer between adjacent ones of the anti-slip grooves is fitted to the anti-slip grooves.

6. The elevator wire rope according to claim 1, wherein a zinc plating layer is formed in inner protective layers of the wires forming the outer layer strands and the inner layer strands.

7. A method for manufacturing a steel wire rope for an elevator is characterized by comprising the following steps:

step 1, preparing a composite material: uniformly mixing the bisphenol A type epoxy resin, the polyether sulfone, the high-carbon steel powder, the toughening fibers and the nano graphene according to the formula amount for three times, and finally adding the curing agent and the defoaming agent according to the formula amount to uniformly mix to obtain a composite material;

step 2, preparing a rope core: preparing the composite material prepared in the step 1 into rope core monofilaments through wire drawing, and then twisting the rope core monofilaments into rope cores;

step 3, preparing the composite steel wire: coating the ultra-high molecular weight polyethylene material on a single steel wire in the forms of extrusion coating, spraying, soaking and drawing or machine brushing, and forming an inner protective layer on the surface of the steel wire to obtain a composite steel wire;

step 4, stranding: twisting the composite steel wire, the water-blocking yarn and the rope core monofilament obtained in the step (3) in a manner that the water-blocking yarn and the rope core monofilament are wrapped and twisted by the composite steel wire to obtain an inner layer strand and an outer layer strand;

step 5, rope combination: at least three rope cores, inner layer strands, outer layer strands, water-blocking yarns and rope core monofilaments are twisted and combined in a specific arrangement mode to form a steel wire rope main body, and the arrangement mode is as follows: the rope cores are arranged in a circumference manner, a preset amount of water-blocking yarns are distributed in a circumference gap formed by the rope cores, the inner layer strands and the outer layer strands are sequentially distributed on the periphery of the rope cores in a circumference manner, and water-blocking yarns and rope core monofilaments are distributed in gaps between the rope cores and the inner layer strands and between the inner layer strands and the outer layer strands;

and 6, forming an outer protective layer: and (3) performing dip coating on the composite material prepared in the step (1) and forming an outer protective layer outside the steel wire rope main body through an outlet structure to obtain the steel wire rope for the elevator.

8. The method of manufacturing a steel wire rope for an elevator according to claim 7, wherein the single steel wire in the step 3 is subjected to a zinc plating treatment before being coated with the ultra-high molecular weight polyethylene material to form a zinc plating layer on the surface.

9. The method for manufacturing a steel wire rope for an elevator according to claim 7, wherein the step 5 of combining the rope comprises the steps of:

step 5.1, first rope combination: twisting more than three rope cores with a predetermined amount of water-blocking yarns to obtain rope core strands;

step 5.2, second rope combination: twisting the rope core strand obtained in the step 5.1, the water-blocking yarn and the rope core monofilament to obtain a central rope, wherein the water-blocking yarn and the rope core monofilament are arranged in a gap between the rope core strand and the inner layer strand;

step 5.3, third rope combination: twisting the central rope obtained in the step 5.2, the water-blocking yarns and the rope core monofilaments to obtain the central rope, wherein the water-blocking yarns and the rope core monofilaments are arranged in a gap between the central rope and the outer layer strands;

the twisting direction of the second rope combination is opposite to that of the first rope combination and the third rope combination.

10. The method for manufacturing a steel wire rope for an elevator according to claim 7, wherein the dip coating in the step 6 is performed by dipping the steel wire rope body in the composite material through a traction device, forming an outer protective layer outside the steel wire rope body through an outlet structure after dipping, uniformly forming anti-slip grooves on the periphery of the outer protective layer, and matching the shape of the outer protective layer between adjacent anti-slip grooves with the anti-slip grooves.

Technical Field

The invention relates to the field of steel wire ropes, in particular to a steel wire rope for an elevator and a manufacturing method thereof.

Background

The steel wire rope is a spiral steel wire bundle formed by twisting steel wires with mechanical properties and geometric dimensions meeting requirements according to a certain rule, and has the advantages of high strength, light dead weight, stable work, difficulty in sudden breaking of the whole steel wire rope and reliable work.

In the running process of the elevator, the elevator is lifted mainly by means of friction between elevator ropes and a traction sheave, and meanwhile, 6-8 traction steel wire ropes lift a lift car, but because the diameters of the steel wire ropes are not uniform, the instantaneous running linear speeds of the steel wire ropes are inconsistent, so that the steel wire ropes and the traction sheave slide relatively to cause vibration of the elevator, the service lives of the steel wire ropes and the traction sheave are shortened, and the higher the building using stairs is, the higher the probability of generating the relative sliding is, and the more obvious the vibration of the elevator is.

Wire rope for elevator need roll along the running roller, wire rope need carry out the angle change that the crooked realization wire rope was realized, consequently, the wire rope that uses not only need possess certain intensity, still need possess certain extensibility simultaneously, in addition, wearing and tearing and corrosion are one of the leading causes that wire rope damaged, wire rope is hardly not worn and torn for ordinary elevator, and wire rope exposes in the air, and there is certain clearance between the steel strand that forms wire rope, the inside and outside all easily oxidizes and rusts, current wire rope adopts electrogalvanizing or hot-galvanize's mode to improve wire rope's wear-resisting corrosion resisting property more, however in the wire rope use, wearing and tearing can cause the condition of wire rope surface damage, and then cause wire rope corrosion and oxidation, influence wire rope's stable performance and use.

At present, the elevator steel wire rope mainly comprises 8 strands of sisal hemp cores, the main structure is 8X 19S + NF, the steel wire rope cannot meet the use requirements of high-rise elevator on wear resistance, corrosion resistance and stable operation, and the uniformity of the diameter of the steel wire rope cannot be ensured by the existing manufacturing method of the elevator steel wire rope.

Disclosure of Invention

The invention aims to provide a steel wire rope for an elevator, which has high strength, good ductility, corrosion resistance, wear resistance and stable operation, and a manufacturing method thereof.

In order to achieve the purpose, the invention provides a steel wire rope for an elevator, which comprises at least three rope cores, an inner layer strand wrapped around the rope cores and an outer layer strand wrapped outside the inner layer strand, wherein the rope cores are twisted to form rope core strands, steel wires forming the inner layer strand and the outer layer strand are wrapped with an inner protective layer, an inner filling layer is formed between the inner layer strand and the rope core strands, an outer filling layer is formed between the outer layer strand and the inner layer strand, water-blocking yarns and rope core monofilaments are filled in the inner filling layer and the outer filling layer, an outer protective layer is wrapped outside the outer layer strand, and water-blocking yarns are filled between the rope cores; the rope core monofilament comprises the following raw materials: polyether sulfone, bisphenol A epoxy resin, high-carbon steel powder, toughening fibers, nano graphene, a curing agent and a defoaming agent; the outer protective layer is made of the same material as the rope core monofilament.

Further preferably, the inner protection layer is an ultra-high molecular weight polyethylene inner protection layer.

Further preferably, the raw materials of the rope core monofilament comprise the following components in percentage by mass: 2-6% of polyether sulfone, 30-40% of bisphenol A epoxy resin, 10-20% of high-carbon steel powder, 10-20% of toughening fibers, 15-25% of nano graphene, 1-5% of a curing agent and 1-5% of a defoaming agent.

Further preferably, the outer protective layer is uniformly formed with anti-slip grooves on the periphery.

Further preferably, the shape of the outer protection layer between the adjacent anti-skid grooves is matched with that of the anti-skid grooves.

Further preferably, a zinc plating layer is formed in an inner protective layer of the steel wire forming the outer layer strand and the inner layer strand.

The invention also provides a manufacturing method of the steel wire rope for the elevator, which comprises the following steps:

step 1, preparing a composite material: uniformly mixing the bisphenol A type epoxy resin, the polyether sulfone, the high-carbon steel powder, the toughening fibers and the nano graphene according to the formula amount for three times, and finally adding the curing agent and the defoaming agent according to the formula amount to uniformly mix to obtain a composite material;

step 2, preparing a rope core: preparing the composite material prepared in the step 1 into rope core monofilaments through wire drawing, and then twisting the rope core monofilaments into rope cores;

step 3, preparing the composite steel wire: coating the ultra-high molecular weight polyethylene material on a single steel wire in the forms of extrusion coating, spraying, soaking and drawing or machine brushing, and forming an inner protective layer on the surface of the steel wire to obtain a composite steel wire;

step 4, stranding: twisting the composite steel wire, the water-blocking yarn and the rope core monofilament obtained in the step (3) in a manner that the water-blocking yarn and the rope core monofilament are wrapped and twisted by the composite steel wire to obtain an inner layer strand and an outer layer strand;

step 5, rope combination: at least three rope cores, inner layer strands, outer layer strands, water-blocking yarns and rope core monofilaments are twisted and combined in a specific arrangement mode to form a steel wire rope main body, and the arrangement mode is as follows: the rope cores are arranged in a circumference manner, a preset amount of water-blocking yarns are distributed in a circumference gap formed by the rope cores, the inner layer strands and the outer layer strands are sequentially distributed on the periphery of the rope cores in a circumference manner, and water-blocking yarns and rope core monofilaments are distributed in gaps between the rope cores and the inner layer strands and between the inner layer strands and the outer layer strands;

and 6, forming an outer protective layer: and (3) performing dip coating on the composite material prepared in the step (1) and forming an outer protective layer outside the steel wire rope main body through an outlet structure to obtain the steel wire rope for the elevator.

Preferably, before the single steel wire in step 3 is coated with the ultra-high molecular weight polyethylene material, the single steel wire is subjected to a galvanizing treatment to form a zinc coating on the surface.

Further preferably, the step 5 of rope combination comprises the following steps:

step 5.1, first rope combination: twisting more than three rope cores with a predetermined amount of water-blocking yarns to obtain rope core strands;

step 5.2, second rope combination: twisting the rope core strand obtained in the step 5.1, the water-blocking yarn and the rope core monofilament to obtain a central rope, wherein the water-blocking yarn and the rope core monofilament are arranged in a gap between the rope core strand and the inner layer strand;

step 5.3, third rope combination: twisting the central rope obtained in the step 5.2, the water-blocking yarns and the rope core monofilaments to obtain the central rope, wherein the water-blocking yarns and the rope core monofilaments are arranged in a gap between the central rope and the outer layer strands;

the twisting direction of the second rope combination is opposite to that of the first rope combination and the third rope combination.

Preferably, in the step 6, the steel wire rope main body is soaked in the composite material through a traction device, and is formed through an outlet structure after being soaked, an outer protection layer is formed outside the steel wire rope main body, anti-skid grooves are uniformly formed on the periphery of the outer protection layer, and the shape of the outer protection layer between every two adjacent anti-skid grooves is matched with that of the anti-skid grooves.

The invention has the following beneficial effects: the elevator steel wire rope provided by the invention is characterized in that a rope core monofilament is prepared from a composite material, then the rope core monofilament is twisted into a rope core, an outer protective layer is formed on the surface of the steel wire rope by using the composite material, the composite material comprises polyether sulfone, bisphenol A epoxy resin, high-carbon steel powder, toughening fibers, nano graphene, a curing agent and a defoaming agent, the polyether sulfone toughening epoxy resin system is taken as a main body, dispersed polyether sulfone is dispersed in the bisphenol A epoxy resin in the form of unplanned deformation particles, a semi-interpenetrating network is formed in the system in the curing process, the dispersed polyether sulfone particles under pressure can cause certain deformation, the toughness of the bisphenol A epoxy resin can be greatly improved, the excellent chemical corrosion resistance, mechanical strength and electrical insulation property of the bisphenol A epoxy resin are not reduced, and the surface and the rope core of the obtained steel wire rope have excellent chemical corrosion resistance, Mechanical strength, toughness and electrical insulation. Nanometer graphite alkene, high carbon steel powder and toughening fiber are added in the system, the adsorption effect of the toughening fiber enables the nanometer graphite alkene and the high carbon steel powder to be monomolecular arrangement and form 'structural fiber' with firm binding force on the fiber surface, and a net-shaped connection structure is formed with a polyether sulfone toughening epoxy resin system, so that the mechanical property and the stability of the system are enhanced, meanwhile, the 'reinforcement' of the fiber has a retarding effect on crack expansion, the self-healing capability of cracks on the rope core and the steel wire rope surface is greatly improved, the elastic recovery is enhanced, the problem of cracks on the rope core and the steel wire rope surface is reduced, the aging and the damage of the steel wire rope are delayed, the tensile strength, the fatigue resistance and the wear resistance of the steel wire rope are improved, the performance is stable, and the practicability is high. The existence of the foaming agent can reduce the foaming rate of the solution, avoid the formation of vacuoles in the obtained rope core and the outer protective layer and ensure the performances of the rope core and the outer protective layer. The curing agent improves the curing rate of the composite material, accelerates the curing speed, and improves the production efficiency and the product strength.

The surface of the steel wire is coated with the ultra-high molecular weight polyethylene protective layer, so that the corrosion resistance, the wear resistance and the ductility of the steel wire rope can be improved on one hand, friction among steel wire strands and between steel wires can be reduced on the other hand, the abrasion of the steel wire rope is reduced, and the service life of the steel wire rope is prolonged.

The water blocking yarns and the rope core monofilaments are filled between the inner layer strand and the outer layer strand and between the inner layer strand and the rope core, and the water blocking yarns are filled between the rope cores, so that a sealed and full structure is formed inside the steel wire rope, water and air are highly blocked, corrosion and oxidation rustiness caused by moisture or air infiltration are avoided, and the corrosion resistance and the practicability of the steel wire rope are improved. In addition, the rope core monofilament filled between the inner layer strand and the outer layer strand and between the inner layer strand and the rope core can improve the tensile property and the bending resistance of the steel wire rope and improve the extensibility and the breaking force of the steel wire rope.

According to the manufacturing method of the steel wire rope for the elevator, provided by the invention, the bisphenol A type epoxy resin, the polyether sulfone, the high-carbon steel powder, the toughening fibers and the nano graphene are mixed in three times, so that the materials are fully and uniformly mixed to form a good net-shaped connection structure, a firm foundation is laid for subsequently manufacturing the steel wire rope with excellent performance, an outer protection layer made of a composite material is coated outside the outer layer strand in a soaking and drawing mode, and the steel wire rope is formed through an outlet structure, so that the diameter consistency of the steel wire rope is ensured, when the steel wire rope is used for the elevator to run, the instantaneous running linear speed of each steel wire rope is consistent, the running is stable, the vibration of the elevator is not caused, and the use feeling and the safety are improved. Meanwhile, the arrangement of the outer protective layer enables the steel wire rope to be compact and stable in structure, the rotation resistance performance is good, and the performance stability of the steel wire rope is improved.

Drawings

Fig. 1 is a schematic structural view of a steel wire rope for an elevator according to the present invention.

Detailed Description

The embodiments described below are only a part of the embodiments of the present invention, and not all of them. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

Referring to fig. 1, the present embodiment provides a steel wire rope for an elevator, which includes at least three rope cores 1, an inner layer strand 2 wrapped around the rope cores 1, and an outer layer strand 3 wrapped outside the inner layer strand 2.

At least three rope cores 1 are twisted to form rope core strands, and steel wires forming the inner layer strands 2 and the outer layer strands 3 are coated with inner protective layers 21 and 31. An inner filling layer 4 is formed between the inner layer strand 2 and the rope core strand, an outer filling layer 5 is formed between the outer layer strand 3 and the inner layer strand 2, and water blocking yarns and rope core monofilaments are filled in the inner filling layer 4 and the outer filling layer 5. An outer protective layer 6 is wrapped outside the outer layer strand 3, and water-blocking yarns are filled among the rope cores 1.

The rope core monofilament comprises the following raw materials: 2-6% of polyether sulfone, 30-40% of bisphenol A epoxy resin, 10-20% of high-carbon steel powder, 10-20% of toughening fibers, 15-25% of nano graphene, 1-5% of a curing agent and 1-5% of a defoaming agent. The polyether sulfone toughened epoxy resin system is taken as a main body, dispersed phase polyether sulfone is dispersed in bisphenol A type epoxy resin in the form of unplanned deformation particles, a semi-interpenetrating network is formed in the system in the curing process, and the dispersed polyether sulfone particles under pressure can cause certain deformation, so that the toughness of the bisphenol A type epoxy resin can be greatly improved, the excellent chemical corrosion resistance, mechanical strength and electrical insulation property of the bisphenol A type epoxy resin are not reduced, and the surface of the obtained steel wire rope and the rope core 1 have excellent chemical corrosion resistance, mechanical strength, toughness and electrical insulation property. Nanometer graphite alkene, high carbon steel powder and toughening fiber are added in the system, the adsorption effect of the toughening fiber enables the nanometer graphite alkene and the high carbon steel powder to be monomolecular arrangement and form 'structural fiber' with firm binding force on the fiber surface, and a net-shaped connection structure is formed with a polyether sulfone toughening epoxy resin system, so that the mechanical property and the stability of the system are enhanced, meanwhile, the 'reinforcement' of the fiber has a retarding effect on crack expansion, the self-healing capability of the surface cracks of the rope core 1 and the steel wire rope is greatly improved, the elastic recovery is enhanced, the problem of the surface cracks of the rope core 1 and the steel wire rope is reduced, the aging and the damage of the steel wire rope are delayed, the tensile strength, the fatigue resistance and the wear resistance of the steel wire rope are improved, the performance is stable, and the practicability is high. The existence of the foaming agent can reduce the foaming rate of the solution, avoid the formation of vacuoles in the obtained rope core 1 and the outer protective layer 6 and ensure the performances of the rope core 1 and the outer protective layer 6. The curing agent improves the curing rate of the composite material, accelerates the curing speed, and improves the production efficiency and the product strength. The rope core 1 prepared from 2-6% of polyether sulfone, 30-40% of bisphenol A epoxy resin, 10-20% of high-carbon steel powder, 10-20% of toughening fibers, 15-25% of nano graphene, 1-5% of curing agent and 1-5% of defoaming agent has good tensile strength, fatigue resistance, wear resistance, elastic recovery, chemical corrosion resistance and electrical insulation and stable performance.

The outer protection layer 6 is made of the same raw materials as the rope core monofilament, the obtained outer protection layer 6 also has good tensile strength, fatigue resistance, wear resistance, elastic recovery, chemical corrosion resistance and electrical insulation, and the performance is stable, so that the overall performance of the steel wire rope can be improved.

Anti-skid grooves 61 are uniformly formed on the periphery of the outer protection layer 6, and the shape of the outer protection layer 6 between the adjacent anti-skid grooves 61 is matched with that of the anti-skid grooves 61. Easy landing when wire rope takes or installs, inconvenient taking and installation, the setting of antislip strip can pass through antiskid groove 61 joint with two adjacent wire rope, is convenient for take and many wire rope merge use and installation, uses many wire rope stacks when being used for the elevator, uses adjacent wire rope joint and also can further guarantee the uniformity of functioning speed, avoids relative slip to cause the elevator vibration, and practicality and safety are high.

Further preferably, a zinc plating layer is formed in the inner protective layers 21, 31 of the steel wires forming the outer layer strands 3 and the inner layer strands 2.

The inner protective layers 21 and 31 are made of ultra-high molecular weight polyethylene, the ultra-high molecular weight polyethylene generally refers to linear polyethylene with the viscosity average molecular weight of more than 150 ten thousand, and has the advantages of corrosion resistance, wear resistance, small friction coefficient, self-lubrication and the like, the ultra-high molecular weight polyethylene is coated on the surfaces of the steel wires, so that the corrosion resistance and the wear resistance of the steel wire strands and the steel wires can be improved, the friction between the steel wire strands and the steel wires can be reduced, the abrasion of the steel wire ropes can be reduced, and the service life of the steel wire ropes can be prolonged. The inner filling layer 4 reaches the outer filling layer 5 is filled with the water-blocking yarn and is formed the rope core monofilament, the water-blocking yarn has high water absorption rate, and is good in longitudinal water-blocking effect, can avoid causing corrosion and oxidation rustiness due to moisture or air infiltration, improves the corrosion resistance of the steel wire rope, has good tensile strength, and is additionally filled with the inner filling layer 4 between the outer filling layer 5 and the steel wire, and the rope core monofilament can improve the tensile strength, the bending resistance and the mechanical strength of the steel wire rope and improve the extensibility of the steel wire rope. The water-blocking yarns and the rope core monofilaments are matched to enable the inner structure of the steel wire rope to be full, and the fixing capacity and the rotation resistance of the steel wire rope structure can be improved by combining the wrapping effect of the outer protection layer 6, so that the structure and the performance are stable, and the practicability is high.

Example 2

The embodiment provides a method for manufacturing a steel wire rope for a ladder, which includes the following steps:

step 1, preparing a composite material: uniformly mixing the bisphenol A type epoxy resin, the polyether sulfone, the high-carbon steel powder, the toughening fibers and the nano graphene according to the formula amount for three times at the mixing temperature of 80-90 ℃, and finally adding the curing agent and the defoaming agent according to the formula amount to uniformly mix to obtain the composite material.

Step 2, preparing the rope core 1: and (3) preparing the composite material prepared in the step (1) into rope core monofilaments through wire drawing, and then twisting the rope core monofilaments into the rope core 1.

Step 3, preparing the composite steel wire: the method comprises the following steps of coating an ultrahigh molecular weight polyethylene material on a single steel wire in an extrusion coating, spraying, soaking and drawing or machine brushing manner, forming inner protective layers 21 and 31 on the surface of the steel wire after curing, and obtaining the composite steel wire, wherein the coating manner of the inner protective layers 21 and 31 is one of the following manners:

1. extrusion coating: the steel wire is made of an ultra-high molecular weight polyethylene material through hot extrusion by an extrusion molding device;

2. spraying: heating and pressurizing through equipment, and spraying the ultra-high molecular weight polyethylene material onto the steel wire through a spray gun;

3. soaking and pumping coating: soaking the steel wire in the ultra-high molecular weight polyethylene material through traction equipment, and forming through an outlet annular structure after soaking;

4. machine brushing: and (3) uniformly coating the ultrahigh molecular weight polyethylene material on the steel wire by using a machine for brushing.

Step 4, stranding: twisting the composite steel wire, the water-blocking yarn and the rope core monofilament obtained in the step (3) in a manner that the water-blocking yarn and the rope core monofilament are wrapped and twisted by the composite steel wire to obtain an inner layer strand 2 and an outer layer strand 3;

step 5, rope combination: at least three rope cores 1, inner layer strand 2, outer layer strand 3, the yarn that blocks water and rope core monofilament are twisted together the rope and form the wire rope main part through specific package mode of twisting with fingers, and the arrangement is: the rope core 1 is arranged in a circumference way, a preset amount of water-blocking yarns are distributed in a circumference gap formed by the rope core 1, the inner layer strand 2 and the outer layer strand 3 are sequentially distributed on the periphery of the rope core 1 in a circumference way, and the water-blocking yarns and rope core monofilaments are distributed in a gap between the rope core 1 and the inner layer strand 2 and a gap between the inner layer strand 2 and the outer layer strand 3;

and 6, forming an outer protection layer 6: soaking a steel wire rope main body in the composite material prepared in the step (1) through traction equipment, forming through an outlet structure after soaking, forming an outer protection layer 6 outside the steel wire rope main body, uniformly forming anti-skidding grooves 61 on the periphery of the outer protection layer 6, and enabling the shape of the outer protection layer 6 between every two adjacent anti-skidding grooves 61 to be matched with the shape of the anti-skidding grooves 61, so that the steel wire rope for the elevator is obtained.

Preferably, before the single steel wire in step 3 is coated with the ultra-high molecular weight polyethylene material, the single steel wire is subjected to a galvanizing treatment to form a zinc coating on the surface.

Further preferably, the step 5 of rope combination comprises the following steps:

step 5.1, first rope combination: twisting more than three rope cores 1 by wrapping and twisting water-blocking yarns with a preset quantity to obtain rope core strands;

step 5.2, second rope combination: twisting the rope core strand obtained in the step 5.1, the water-blocking yarn and the rope core monofilament of the inner layer strand 2 to obtain a central rope, wherein the water-blocking yarn and the rope core monofilament are arranged in a gap between the rope core strand and the inner layer strand 2;

step 5.3, third rope combination: twisting the central rope obtained in the step 5.2, the water-blocking yarns and the rope core monofilaments by the inner layer strands 2 to obtain the central rope, wherein the water-blocking yarns and the rope core monofilaments are arranged in a gap between the central rope and the outer layer strands 3;

the twisting direction of the second rope combination is opposite to that of the first rope combination and the third rope combination, so that the torsion resistance of a finished steel wire rope product can be improved, the strand loosening is avoided, and the stability of the structure and the performance of the steel wire rope is improved.

The steel wire rope prepared by the manufacturing method of the elevator steel wire rope has the advantages of good tensile strength, fatigue resistance, wear resistance, elastic recovery, chemical corrosion resistance and electrical insulation, high torsion resistance and bursting tension, stable structure and performance, strong practicability and wide application range. In addition, the tolerance of the diameter of the steel wire rope is controlled to be 0.1-0.8% of the diameter of the steel wire rope, the dispersion of the steel wire rope in each meter of the steel wire rope is controlled to be within 1%, the uniformity of the diameter of the steel wire rope is good, the comfort and the stability of the elevator are good in the running process, and the anti-skidding grooves 61 of the steel wire rope are arranged, so that the stability of the steel wire rope in the using process of the elevator can be further improved, and the elevator is suitable for elevators used in high-rise buildings.

While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention.