A method for preparing ultra-high molecular weight polyethylene fiber power rope

Abstract

The present invention discloses a method for preparing an ultra-high molecular weight polyethylene fiber electric rope, which relates to the technical field of electric traction ropes. The preparation comprises the following steps: paralleling and twisting; dipping: the ultra-high molecular weight polyethylene fiber strands are transported by guide rollers to the inside of a dipping tank for dipping, and the resin glue is a mixture of triallyl isocyanurate, phenolic resin, oily polyurethane and glass microbeads; extrusion and pre-drying; preliminary drying; braiding the rope core; pre-shaping; drying and shaping; braiding a double sheath; coating. The advantages of the present invention are that when the ultra-high molecular weight polyethylene fiber electric rope is prepared, it is functionalized by the composite resin glue in the dipping tank, and through the synergistic effect between triallyl isocyanurate, phenolic resin, oily polyurethane and glass microbeads in a specific ratio, and the optimization of the processing technology, the high temperature resistance and corrosion resistance of the electric rope are improved, the overall strength is enhanced, and the insulation resistance is good, which meets the use requirements of some specific occasions.

Description

Technical Field

[0001] The present invention relates to the technical field of electric traction ropes, and in particular to a method for preparing an ultra-high molecular weight polyethylene fiber electric rope. Background Art

[0002] Power ropes are typically made of polyethylene fiber or nylon. Polypropylene is more chemically resistant than nylon and is therefore widely used in the power rope industry. Ultra-high molecular weight polyethylene (UHMWPE) is an unbranched linear polyethylene with a molecular weight of over 1.5 million. Its abrasion resistance is dozens of times greater than that of ordinary polyethylene fiber. Therefore, power ropes made with UHMWPE fiber have even better wear resistance.

[0003] In existing technology, power ropes made from polyethylene fibers or ultra-high molecular weight polyethylene fibers are typically produced through a process called twisting, stranding, and braiding. These twisting and braiding operations compromise the strength advantages of polyethylene fibers, reducing the strength of the resulting power ropes and failing to fully utilize the material's properties. Improving the production process could further enhance the performance of power ropes, meeting the requirements of specific scenarios. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a method for preparing ultra-high molecular weight polyethylene fiber power ropes, which can improve the problem that the ultra-high molecular weight polyethylene fiber power ropes prepared by the existing technology have reduced performance and cannot meet the use requirements of some specific occasions.

[0005] In order to solve the above technical problems, the technical solution of the present invention is as follows:

[0006] S1. Parallel and twisting: Several ultra-high molecular weight polyethylene fibers are combined into one strand. The paralleled ultra-high molecular weight polyethylene fibers are twisted through a twisting machine. The transmission belt of the twisting machine is kept at the same tightness.

[0007] S2. Dipping: The ultra-high molecular weight polyethylene fiber strands are transported to the dipping tank by the guide roller for dipping. After entering the dipping tank, the fiber strands are guided to the outer surface of the roller by the guide roller. The transverse pressure roller provided on one side of the roller works together with the roller and the two pressure rollers of the pressure roller group interact with each other to squeeze and dip the fiber strands in different directions. The resin glue in the dipping tank is evenly applied to the ultra-high molecular weight polyethylene fibers and then guided to the outside of the dipping tank by the guide roller.

[0008] The resin glue is a mixture of triallyl isocyanurate, phenolic resin, oily polyurethane and glass microbeads;

[0009] S3, extrusion and pre-drying: the ultra-high molecular weight polyethylene fiber strands after dipping are squeezed through the squeezing roller group to squeeze out the excess glue. During the extrusion, the ultra-high molecular weight polyethylene fiber strands are pre-dried by the heated squeezing rollers at a temperature of 90-95°C.

[0010] S4, preliminary drying: drying the pre-dried ultra-high molecular weight polyethylene fiber strands at 110-120° C. for 40-50 minutes;

[0011] S5, braided rope core: 16-18 ultra-high molecular weight polyethylene fiber strands are mechanically mixed and braided into a rope core;

[0012] S6. Pre-shaping: The braided rope core is pre-shaped by the shaping equipment to evenly distribute the resin glue on the ultra-high molecular weight polyethylene fiber strands constituting the rope core;

[0013] S7, drying and shaping: heat-setting the pre-dried ultra-high molecular weight polyethylene fiber strands at a temperature of 150-170° C. for 50-60 minutes;

[0014] S8, braided double sheath: 10 strong silk strands and 10 nylon fiber filament strands are mixed and braided into the first sheath by a braiding machine outside the rope core. DuPont silk 1×3 twisted yarn is used to braid a double-strand pattern outside the first sheath to form the second sheath;

[0015] S9. Coating: The rope core braided with double sheaths is immersed in a finishing liquid for coating adhesion, and then dried in an oven to make an ultra-high molecular weight polyethylene fiber power rope.

[0016] Furthermore, the phenolic resin is diluted with acetone solvent, the concentration of the phenolic resin is 0.05-0.5 g / ml, the phenolic resin is phenolic epoxy vinyl ester resin, and the oily polyurethane is a high molecular weight polyurethane emulsion;

[0017] The mass ratio of triallyl isocyanurate, phenolic resin and oily polyurethane is 2:3:3, and the mass ratio of the sum of triallyl isocyanurate, phenolic resin and oily polyurethane to glass microbeads is 5-6:1.

[0018] Furthermore, in step S2, the dipping tank has a tank body, the top of the tank body has a glue inlet, and the lower side of the tank body has a glue outlet;

[0019] A roller is provided in the pool body, and the roller is installed through a mounting shaft, and the mounting shaft is mounted on the pool wall of the pool body through a bearing, and the mounting shaft passes through the pool wall to the outside of the pool body, and the mounting shaft is driven to rotate by a rotary motor, and the mounting shaft is fixedly connected to the inner wall of the roller through a connecting rod;

[0020] The outer peripheral side of the roller is equipped with a transverse pressing roller, and the transverse pressing rollers are provided with at least 4 transverse pressing rollers, which are evenly distributed and installed through support shafts. The support shafts are fixed to the inner wall of the pool body through brackets, and the ultra-high molecular weight polyethylene fiber strands pass between the transverse pressing rollers and the rollers;

[0021] A pressure roller group is further provided on the outer peripheral side of the roller, and the pressure roller group is arranged between two adjacent transverse pressure rollers. There are at least three pressure roller groups, and the two pressure rollers of the pressure roller group are arranged vertically or obliquely. The ultra-high molecular weight polyethylene fiber strand passes between the two pressure rollers of the pressure roller group;

[0022] A feed port is provided on one side of the pool body, and a discharge port is provided on the other side. Guide rollers are respectively installed inside the pool body near the feed port and the discharge port. Guide rollers are also respectively installed at the lower positions on both sides of the roller. The guide rollers guide the ultra-high molecular weight polyethylene fiber strands to pass over the outer periphery of the roller, and the conveying direction of the ultra-high molecular weight polyethylene fiber strands is the length direction of the pool body.

[0023] Further, in step S3, the squeezing roller group is provided with two groups, the two squeezing rollers of each squeezing roller group are correspondingly arranged up and down, the two squeezing roller groups are distributed left and right, and the squeezing roller below the squeezing roller group away from the dipping tank is correspondingly arranged above the squeezing roller group close to the dipping tank, and the ultra-high molecular weight polyethylene fiber strand passes between the two squeezing rollers of the squeezing roller group close to the dipping tank, passes between the squeezing rollers corresponding to the two squeezing roller groups, and then passes between the two squeezing rollers of the squeezing roller group away from the dipping tank, and is squeezed multiple times to remove excess glue;

[0024] The installation structure of the two squeezing rollers of the squeezing roller group away from the dipping tank is as follows: the squeezing rollers are installed on the outer wall of the dipping tank through a mounting frame, the interior of the mounting frame is empty, the interior of the squeezing rollers is empty, both ends of the squeezing rollers are respectively connected with connecting parts, the connecting parts and the mounting frame are connected through a rotary joint, a plurality of exhaust holes are provided on the squeezing rollers, and an air inlet is provided on the mounting frame. The gas enters the mounting frame from the air inlet, then enters the interior of the squeezing rollers through the rotary joint, and is discharged from the exhaust holes on the squeezing rollers. An electric heating wire is provided inside the mounting frame, and the gas is heated by the electric heating wire. The heated hot air is blown toward the ultra-high molecular weight polyethylene fiber strands to pre-dry them.

[0025] Furthermore, in step S6, the shaping device includes a plurality of shaping rollers arranged in a ring shape, the plurality of shaping rollers forming a circular space for the rope core to pass through, and the plurality of shaping rollers are evenly distributed;

[0026] Each shaping roller is individually sleeved on a fixed shaft, and the fixed shafts on which the shaping rollers are installed are connected and fixed by a fixing frame. The fixing frame and the fixed shaft are connected to form a whole. Support frames are respectively connected on both sides of the whole formed by the connection of the fixing frame and the fixed shaft. The support frame is supported by supporting legs. Uniform pressure is applied to the periphery of the rope core by the evenly arranged shaping rollers, and the resin glue on the several ultra-high molecular weight polyethylene fiber strands constituting the rope core is evenly distributed again by extrusion.

[0027] Furthermore, in step S9, the finishing liquid includes organosilicon and fluoropolymer oleophobic and water-repellent agent, and the mass ratio of the organosilicon to the fluoropolymer oleophobic and water-repellent agent is 3-4:5.

[0028] The advantages of the present invention are that: when preparing the ultra-high molecular weight polyethylene fiber power rope, the ultra-high molecular weight polyethylene fiber strands are functionally treated by the composite resin glue in the dipping tank, the composite resin glue is a mixture of triallyl isocyanurate, phenolic resin, oily polyurethane and glass microbeads, and triallyl isocyanurate can penetrate into the ultra-high molecular weight polyethylene fiber and be embedded between the fiber macromolecules during the stretching and extrusion process to modify the fiber, thereby improving the strength of the ultra-high molecular weight polyethylene fiber and compensating for the influence of twisting, braiding and other operations on the strength of the ultra-high molecular weight polyethylene fiber. At the same time, through the synergistic effect of the specific ratio of triallyl isocyanurate, phenolic resin, oily polyurethane and glass microbeads, the heat deformation temperature of the ultra-high molecular weight polyethylene fiber strands can be increased, the high temperature resistance and corrosion resistance of the power rope can be improved, the overall strength is enhanced, the insulation resistance is good, and the use requirements of some specific occasions can be met;

[0029] When dipping the ultra-high molecular weight polyethylene fiber strands, the resin glue in the dipping tank is evenly applied to the ultra-high molecular weight polyethylene fibers by squeezing the glue in different directions, and the dipping is more thorough, resulting in a better dipping effect. When the roller rotates and squeezes, it drives the connecting rod to rotate synchronously, which can stir the glue in the dipping tank to prevent precipitation.

[0030] After the dip, the ultra-high molecular weight polyethylene fiber strands pass through the squeezing roller group to squeeze out the excess glue. During the squeezing, the hot air discharged by the squeezing roller is blown to the ultra-high molecular weight polyethylene fiber strands to pre-dry the strands and prevent the glue from falling during subsequent transportation.

[0031] After pre-drying, preliminary drying is carried out before the rope core is braided. The glue attached during braiding will not fall off, and the scratching of the glue attached during the braiding process after complete drying can also be avoided. After the rope core is braided, it is pre-shaped and then dried. The pre-shaping can give the rope core a balanced extrusion, so that the resin glue that has not been completely dried on the ultra-high molecular weight polyethylene fiber strands is once again evenly distributed, and the overall shape of the rope core is pre-arranged, which is convenient for the subsequent sheath braiding. After pre-shaping, it is dried and shaped. After the resin glue is completely cured, the sheath is braided. The sheath can protect the rope core from wear. The final coating operation can improve the waterproof, moisture-proof and insulation properties of the power rope, and further enhance the wear resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a structural schematic diagram of the dipping tank and the squeezing roller group of the present invention;

[0033] Figure 2 This is a schematic diagram of the structure of the squeezing rollers of the squeezing roller group away from the dipping tank of the present invention;

[0034] Figure 3 It is a structural schematic diagram of the shaping device of the present invention. Implementation Method

[0035] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The following examples can enable those skilled in the art to understand the present invention more comprehensively, but the present invention is not limited to the scope of the embodiments.

[0036] This specific embodiment adopts the following technical solution: a method for preparing an ultra-high molecular weight polyethylene fiber power rope, comprising the following steps:

[0037] S1. Parallel and twisting: 6 ultra-high molecular weight polyethylene fibers are paralleled into one strand. The paralleled ultra-high molecular weight polyethylene fibers are twisted through a twisting machine. The transmission belt of the twisting machine is kept at the same tightness.

[0038] S2. Dipping: The ultra-high molecular weight polyethylene fiber strands are transported by the guide roller to the inside of the dipping tank for dipping. After the fiber strands enter the dipping tank, they are guided to the outer surface of the roller by the guide roller. The transverse pressure roller arranged on one side of the roller works together with the roller and the two pressure rollers of the pressure roller group interact with each other to squeeze and dip the fiber strands in different directions. The resin glue in the dipping tank acts evenly on the ultra-high molecular weight polyethylene fibers and is then guided and output to the outside of the dipping tank by the guide roller.

[0039] The resin glue is a mixture of triallyl isocyanurate, phenolic resin, oily polyurethane and glass microbeads; the phenolic resin is diluted with acetone solvent, the phenolic resin concentration is 0.05~0.5g / ml, the phenolic resin is phenolic epoxy vinyl ester resin, and the phenolic resin concentration in the embodiment is set to 0.1g / ml, and the oily polyurethane is a high molecular weight polyurethane emulsion.

[0040] The mass ratio of triallyl isocyanurate, phenolic resin and oily polyurethane is 2:3:3, and the mass ratio of the sum of triallyl isocyanurate, phenolic resin and oily polyurethane to glass microbeads is 5-6:1.

[0041] like Figure 1 As shown, the dipping tank has a tank body 1, a glue inlet 2 is provided on the top of the tank body 1, and a glue outlet 3 is provided on the lower side of the tank body 1. Resin glue is added into the tank body 1 through the glue inlet 2, and the residue is discharged through the glue outlet 3.

[0042] A roller 4 is provided in the pool body 1, and the roller 4 is installed through a mounting shaft 5. The mounting shaft 5 is installed on the pool wall of the pool body 1 through a bearing, and the mounting shaft 5 passes through the pool wall to the outside of the pool body 1. The mounting shaft 5 is driven to rotate by a rotating motor. The mounting shaft 5 and the inner wall of the roller 4 are fixedly connected by a connecting rod 6. The rotating motor drives the mounting shaft 5 to rotate, and the mounting shaft 5 drives the connecting rod 6 and the roller 4 to rotate synchronously. The two ends of the roller 4 are opened, and the connecting rod 6 can stir the resin glue in the pool body 1 to prevent precipitation.

[0043] The outer peripheral side of the roller 4 is equipped with a transverse pressing roller 7. In this embodiment, four transverse pressing rollers 7 are provided, and the transverse pressing rollers 7 are evenly distributed. The transverse pressing rollers 7 are installed through support shafts, and the support shafts are fixed to the inner wall of the pool body 1 through brackets 8. The ultra-high molecular weight polyethylene fiber strands pass through the four transverse pressing rollers 7 and the roller 4 to achieve extrusion and dipping, and the dipping is more sufficient. The same roller 4 can cooperate with several transverse pressing rollers 7 for extrusion, avoiding the need to install several additional pressing rollers that cooperate with the transverse pressing rollers 7, and the roller 4 can limit the ultra-high molecular weight polyethylene fiber strands to be transported in their circumferential direction. The connecting rod 6 on the roller 4 can also play a stirring role.

[0044] A pressure roller group 9 is also provided on the outer peripheral side of the roller 4. The pressure roller group 9 is arranged between two adjacent transverse pressure rollers 7. In this embodiment, there are three pressure roller groups 9. The two pressure rollers of the pressure roller group 9 are arranged vertically or obliquely. The ultra-high molecular weight polyethylene fiber strands pass between the two pressure rollers of the pressure roller group 9, so that the ultra-high molecular weight polyethylene fiber strands are squeezed in different directions, avoiding omissions during dipping, and making the dipping more thorough, so that the resin glue can fully penetrate into each fiber of the ultra-high molecular weight polyethylene fiber strands.

[0045] A feed port 11 is provided on one side of the pool body 1, and a discharge port 12 is provided on the other side. In this embodiment, the feed port 11 is provided on the right side of the pool body 1, and the discharge port 12 is provided on the left side of the pool body 1. The ultra-high molecular weight polyethylene fiber strands enter the pool body 1 from the right side for dipping in glue and are output from the pool body 1 from the left side. Guide rollers 10 are respectively installed inside the pool body 1 near the feed port 11 and the discharge port 12, and guide rollers 10 are also respectively installed at the lower positions on both sides of the roller 4. The ultra-high molecular weight polyethylene fiber strands are guided by the guide rollers 10 to pass over the outer periphery of the roller 4.

[0046] S3, extrusion and pre-drying: The ultra-high molecular weight polyethylene fiber strands after dipping are squeezed out of excess glue by the squeezing roller group 13. During the extrusion, the ultra-high molecular weight polyethylene fiber strands are pre-dried by the heated squeezing rollers 13. The pre-drying temperature is 90-95°C. In the embodiment, the pre-drying temperature is set to 90°C.

[0047] There are two groups of squeezing roller groups, and the two squeezing rollers 13 of each squeezing roller group are correspondingly arranged up and down. The two squeezing roller groups are distributed left and right, and the squeezing roller 13 below the squeezing roller group away from the dipping tank and the squeezing roller 13 above the squeezing roller group close to the dipping tank are correspondingly arranged to form a squeezing roller group. After the ultra-high molecular weight polyethylene fiber strands are squeezed between the two squeezing rollers 13 of the squeezing roller group close to the dipping tank, they pass between the squeezing rollers 13 corresponding to the two squeezing roller groups, and then pass between the two squeezing rollers 13 of the squeezing roller group away from the dipping tank to achieve re-extrusion. Multiple squeezings can remove excess glue.

[0048] The installation structure of the two squeezing rollers 13 of a group of squeezing rollers away from the dipping tank is as follows: the squeezing rollers 13 are installed on the outer wall of the dipping tank through the mounting frame 14, and the interior of the mounting frame 14 is empty. Figure 2 As shown, the interior of the squeezing roller 13 is empty, and the two ends of the squeezing roller 13 are respectively connected with a connecting part 131. The connecting part 131 is connected to the mounting frame 14 through a rotary joint 15. A plurality of exhaust holes 132 are provided on the squeezing roller 13, and an air inlet 141 is provided on the mounting frame 14. The gas enters the mounting frame 14 from the air inlet 141, and then enters the squeezing roller 13 through the rotary joint 15, and is discharged from the exhaust holes 132 on the squeezing roller 13. An electric heating wire is provided inside the mounting frame 14, and the gas is heated by the electric heating wire. The heated hot air is blown to the ultra-high molecular weight polyethylene fiber strands to pre-dry them to prevent the glue from falling during subsequent transportation.

[0049] S4, preliminary drying: the pre-dried ultra-high molecular weight polyethylene fiber strands are dried at a temperature of 110-120 ° C for 40-50 minutes. In the embodiment, the drying temperature is 120 ° C and the drying time is 40 minutes. After pre-drying, preliminary drying is performed before braiding the rope core. The adhesive liquid attached during braiding will not fall off, and the scratching of the adhesive liquid attached during the braiding process after complete drying can also be avoided.

[0050] S5. Braided rope core: 18 ultra-high molecular weight polyethylene fiber strands are mechanically mixed and braided into a rope core.

[0051] S6. Pre-shaping: The braided rope core is pre-shaped by the shaping equipment to evenly distribute the resin glue on the ultra-high molecular weight polyethylene fiber strands that constitute the rope core. The rope core is pre-shaped and then dried after braiding. The pre-shaping can give the rope core a balanced extrusion on the periphery, so that the resin glue that has not been completely dried on the ultra-high molecular weight polyethylene fiber strands is evenly distributed again, and the overall shape of the rope core is pre-arranged, which is convenient for the subsequent sheath braiding.

[0052] like Figure 3 As shown, the shaping equipment includes several shaping rollers 16 arranged in a ring shape. In this embodiment, there are 16 shaping rollers 16. The 16 shaping rollers 16 form a circular space for the rope core to pass through, and the 16 shaping rollers 16 are evenly distributed.

[0053] Each shaping roller 16 is individually sleeved on a fixed shaft 17. The 16 fixed shafts 17 on which the 16 shaping rollers 16 are installed are connected and fixed by a fixing frame 18. The fixing frame 18 and the fixed shaft 17 are connected to form a whole. Support frames 19 are respectively connected on both sides of the whole formed by the connection of the fixing frame 18 and the fixed shaft 17. The support frame 19 is supported by support legs 20. The rope core passes through the circular space surrounded by the shaping rollers 16. The 16 evenly arranged shaping rollers 16 apply uniform pressure to the outer periphery of the rope core, and the resin glue on the several strands of ultra-high molecular weight polyethylene fiber strands constituting the rope core is evenly distributed again through extrusion.

[0054] S7. Drying and shaping: The pre-dried ultra-high molecular weight polyethylene fiber strands are heat-shaped at 150-170°C for 50-60 minutes, dried and shaped after pre-shaping, and the sheath is braided after the resin glue is completely cured.

[0055] S8, braided double sheath: 10 strong silk strands and 10 nylon fiber filament strands are mixed and woven into the first sheath by a braiding machine outside the rope core. DuPont silk 1×3 twisted yarn is used to weave a double-strand pattern outside the first sheath to form the second sheath. The double-layer sheath can protect the rope core from wear and tear.

[0056] S9. Coating: The braided double-sheathed rope core is immersed in a finishing liquid for coating adhesion, and then dried in an oven to form an ultra-high molecular weight polyethylene fiber power rope; the finishing liquid includes silicone and fluoropolymer oleophobic and water-repellent agents, and the mass ratio of silicone and fluoropolymer oleophobic and water-repellent agents is 3-4:5. The coating can improve the waterproof, moisture-proof and insulating properties of the power rope, and also enhance the wear resistance. Example

[0057] Ultra-high molecular weight polyethylene fiber power ropes were prepared according to the steps of the above examples, wherein the mass ratio of triallyl isocyanurate, phenolic resin, and oily polyurethane in the resin glue was 2:3:3, and the mass ratio of the sum of triallyl isocyanurate, phenolic resin, and oily polyurethane to glass microspheres was 5:1;

[0058] The mass ratio of the organosilicon to the fluoropolymer oleophobic and water-repellent agent in the finishing liquid is 3:5. Example

[0059] Ultra-high molecular weight polyethylene fiber power ropes were prepared according to the steps of the above example, wherein the mass ratio of triallyl isocyanurate, phenolic resin, and oily polyurethane in the resin glue was 2:3:3, and the mass ratio of the sum of triallyl isocyanurate, phenolic resin, and oily polyurethane to glass microspheres was 6:1;

[0060] The mass ratio of the organosilicon to the fluoropolymer oleophobic and water-repellent agent in the finishing liquid is 4:5. Example

[0061] Ultra-high molecular weight polyethylene fiber power ropes were prepared according to the steps of the above examples, wherein the mass ratio of triallyl isocyanurate, phenolic resin, and oily polyurethane in the resin glue was 2:3:3, and the mass ratio of the sum of triallyl isocyanurate, phenolic resin, and oily polyurethane to glass microspheres was 5.5:1;

[0062] The finishing liquid includes organic silicon and fluoropolymer oleophobic and water-repellent agent, and the mass ratio of the organic silicon to the fluoropolymer oleophobic and water-repellent agent is 3.5:5.

[0063] Comparative Example 1:

[0064] Ultra-high molecular weight polyethylene fiber power ropes were prepared according to the steps of the above examples, wherein the mass ratio of triallyl isocyanurate, phenolic resin, and oily polyurethane in the resin glue was 0:3:3, and the mass ratio of the sum of triallyl isocyanurate, phenolic resin, and oily polyurethane to glass microspheres was 5:1;

[0065] The finishing liquid includes organic silicon and fluoropolymer oleophobic and water-repellent agent, and the mass ratio of the organic silicon to the fluoropolymer oleophobic and water-repellent agent is 3:5.

[0066] Comparative Example 2:

[0067] Ultra-high molecular weight polyethylene fiber power ropes were prepared according to the steps of the above examples, wherein the mass ratio of triallyl isocyanurate, phenolic resin, and oily polyurethane in the resin glue was 2:0:3, and the mass ratio of the sum of triallyl isocyanurate, phenolic resin, and oily polyurethane to glass microspheres was 6:1;

[0068] The finishing liquid includes organic silicon and fluoropolymer oleophobic and water-repellent agent, and the mass ratio of the organic silicon to the fluoropolymer oleophobic and water-repellent agent is 4:5.

[0069] Comparative Example 3:

[0070] Ultra-high molecular weight polyethylene fiber power ropes were prepared according to the steps of the above examples, wherein the mass ratio of triallyl isocyanurate, phenolic resin, and oily polyurethane in the resin glue was 2:3:0, and the mass ratio of the sum of triallyl isocyanurate, phenolic resin, and oily polyurethane to glass microspheres was 5.5:1;

[0071] The finishing liquid includes organic silicon and fluoropolymer oleophobic and water-repellent agent, and the mass ratio of the organic silicon to the fluoropolymer oleophobic and water-repellent agent is 3.5:5.

[0072] Comparative Example 4:

[0073] Comparative Example 4 only includes steps S1 of paralleling and twisting, S5 of braiding the rope core, S7 of drying and shaping, S8 of braiding the double sheath, and S9 of coating in Example 1, and the ultra-high molecular weight polyethylene fiber strands are not subjected to steps S2 of dipping, S3 of extrusion and pre-drying, S4 of preliminary drying, and S6 of pre-shaping.

[0074] Comparative Example 5:

[0075] Comparative Example 5 has the same steps as those in Example 1, except that in step S2, during the dipping process, the ultra-high molecular weight polyethylene fiber strands are only passed through a conventional dipping tank, and the ultra-high molecular weight polyethylene fiber strands are transported to the inside of the dipping tank by a guide roller, and are transported and dipped under the guidance of three guide rollers distributed in a triangular shape inside the dipping tank.

[0076] Comparative Example 6:

[0077] Comparative Example 6 has the same steps as Example 1, except that the pre-drying in S3, the pre-shaping in S6 and the drying and shaping in S7 are not included. In step S4, drying and shaping are directly performed at a temperature of 150-170°C for 50-60 minutes.

[0078] Ultra-high molecular weight polyethylene fiber power ropes were prepared according to the steps of Examples 1-3 and Comparative Examples 1-6. The comparative results of the breaking strength, corrosion resistance, high temperature resistance, and insulation resistance of the prepared ultra-high molecular weight polyethylene fiber power ropes are shown in the following table.

[0079] The above results show that the ultra-high molecular weight polyethylene fiber power ropes prepared in Examples 1-3 have good breaking strength, corrosion resistance, high temperature resistance, and insulation resistance. The synergistic effect between the specific ratio of triallyl isocyanurate, phenolic resin, oily polyurethane, and glass microbeads can improve the high temperature resistance and corrosion resistance of the power rope, enhance the overall strength, and improve the insulation resistance, meeting the use requirements of some specific occasions.

[0080] Compared with Examples 1-3, the corresponding breaking strength, high temperature resistance, and corrosion resistance of the ultra-high molecular weight polyethylene fiber power ropes prepared by Comparative Examples 1-3 are significantly reduced. The ultra-high molecular weight polyethylene fiber power rope prepared by Comparative Example 4 is a conventional power rope in the prior art, and its breaking strength, corrosion resistance, high temperature resistance and insulation resistance are all poor. Ultra-high molecular weight polyethylene fiber power ropes were prepared by Comparative Examples 5-6. Due to the different structures of the dipping pools and different preparation steps, the resin glue was unevenly distributed during the preparation, and the breaking strength, corrosion resistance, high temperature resistance and insulation resistance of the prepared ultra-high molecular weight polyethylene fiber power ropes were all reduced.

[0081] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for preparing an ultra-high molecular weight polyethylene fiber power rope, characterized by: The following steps are involved: S1. Parallel and twisting: Several ultra-high molecular weight polyethylene fibers are combined into one strand. The paralleled ultra-high molecular weight polyethylene fibers are twisted through a twisting machine. The transmission belt of the twisting machine is kept at the same tightness. S2. Dipping: The ultra-high molecular weight polyethylene fiber strands are transported to the dipping tank by the guide roller for dipping. After entering the dipping tank, the fiber strands are guided to the outer surface of the roller by the guide roller. The transverse pressure roller provided on one side of the roller works together with the roller and the two pressure rollers of the pressure roller group interact with each other to squeeze and dip the fiber strands in different directions. The resin glue in the dipping tank is evenly applied to the ultra-high molecular weight polyethylene fibers and then guided to the outside of the dipping tank by the guide roller. The resin glue is a mixture of triallyl isocyanurate, phenolic resin, oily polyurethane and glass microbeads; S3, extrusion and pre-drying: the ultra-high molecular weight polyethylene fiber strands after dipping are squeezed through the squeezing roller group to squeeze out the excess glue. During the extrusion, the ultra-high molecular weight polyethylene fiber strands are pre-dried by the heated squeezing rollers at a temperature of 90-95°C. S4, preliminary drying: drying the pre-dried ultra-high molecular weight polyethylene fiber strands at 110-120° C. for 40-50 minutes; S5, braided rope core: 16-18 ultra-high molecular weight polyethylene fiber strands are mechanically mixed and braided into a rope core; S6. Pre-shaping: The braided rope core is pre-shaped by the shaping equipment to evenly distribute the resin glue on the ultra-high molecular weight polyethylene fiber strands constituting the rope core; S7, drying and shaping: heat-setting the pre-shaped ultra-high molecular weight polyethylene fiber strands at a temperature of 150-170° C. for 50-60 minutes; S8, braided double sheath: 10 strong silk strands and 10 nylon fiber filament strands are mixed and braided into the first sheath by a braiding machine outside the rope core. DuPont silk 1×3 twisted yarn is used to braid a double-strand pattern outside the first sheath to form the second sheath; S9. Coating: The rope core braided with double sheaths is immersed in a finishing liquid for coating adhesion, and then dried in an oven to make an ultra-high molecular weight polyethylene fiber power rope.

2. The method for preparing an ultra-high molecular weight polyethylene fiber power rope according to claim 1, characterized in that: The phenolic resin is diluted with acetone solvent, the concentration of the phenolic resin is 0.05-0.5 g / ml, the phenolic resin is phenolic epoxy vinyl ester resin, and the oily polyurethane is a high molecular weight polyurethane emulsion; The mass ratio of triallyl isocyanurate, phenolic resin and oily polyurethane is 2:3:3, and the mass ratio of the sum of triallyl isocyanurate, phenolic resin and oily polyurethane to glass microbeads is 5-6:

1.

3. The method for preparing an ultra-high molecular weight polyethylene fiber power rope according to claim 1, characterized in that: In step S2, the dipping tank has a tank body, the top of the tank body has a glue inlet, and the lower side of the tank body has a glue outlet; A roller is provided in the pool body, and the roller is installed through a mounting shaft, and the mounting shaft is mounted on the pool wall of the pool body through a bearing, and the mounting shaft passes through the pool wall to the outside of the pool body, and the mounting shaft is driven to rotate by a rotary motor, and the mounting shaft is fixedly connected to the inner wall of the roller through a connecting rod; The outer peripheral side of the roller is equipped with a transverse pressing roller, and the transverse pressing rollers are provided with at least 4 transverse pressing rollers, which are evenly distributed and installed through support shafts. The support shafts are fixed to the inner wall of the pool body through brackets, and the ultra-high molecular weight polyethylene fiber strands pass between the transverse pressing rollers and the rollers; A pressure roller group is further provided on the outer peripheral side of the roller, and the pressure roller group is arranged between two adjacent transverse pressure rollers. There are at least three pressure roller groups, and the two pressure rollers of the pressure roller group are arranged vertically or obliquely. The ultra-high molecular weight polyethylene fiber strand passes between the two pressure rollers of the pressure roller group; A feed port is provided on one side of the pool body, and a discharge port is provided on the other side. Guide rollers are respectively installed inside the pool body near the feed port and the discharge port. Guide rollers are also respectively installed at the lower positions on both sides of the roller. The guide rollers guide the ultra-high molecular weight polyethylene fiber strands to pass over the outer periphery of the roller, and the conveying direction of the ultra-high molecular weight polyethylene fiber strands is the length direction of the pool body.

4. The method for preparing an ultra-high molecular weight polyethylene fiber power rope according to claim 1, characterized in that: In the step S3, the squeezing roller group is provided with two groups, the two squeezing rollers of each squeezing roller group are correspondingly arranged up and down, the two squeezing roller groups are distributed left and right, and the squeezing roller below the squeezing roller group away from the dipping tank is correspondingly arranged above the squeezing roller group close to the dipping tank. After the ultra-high molecular weight polyethylene fiber strand passes between the two squeezing rollers of the squeezing roller group close to the dipping tank, it passes between the squeezing rollers corresponding to the two squeezing roller groups, and then passes between the two squeezing rollers of the squeezing roller group away from the dipping tank, and is squeezed multiple times to remove excess glue. The installation structure of the two squeezing rollers of the squeezing roller group away from the dipping tank is as follows: the squeezing rollers are installed on the outer wall of the dipping tank through a mounting frame, the interior of the mounting frame is empty, the interior of the squeezing rollers is empty, both ends of the squeezing rollers are respectively connected with connecting parts, the connecting parts and the mounting frame are connected through a rotary joint, a plurality of exhaust holes are provided on the squeezing rollers, and an air inlet is provided on the mounting frame. The gas enters the mounting frame from the air inlet, then enters the interior of the squeezing rollers through the rotary joint, and is discharged from the exhaust holes on the squeezing rollers. An electric heating wire is provided inside the mounting frame, and the gas is heated by the electric heating wire. The heated hot air is blown toward the ultra-high molecular weight polyethylene fiber strands to pre-dry them.

5. The method for preparing an ultra-high molecular weight polyethylene fiber power rope according to claim 1, characterized in that: In step S6, the shaping equipment includes a plurality of shaping rollers arranged in a ring shape, the plurality of shaping rollers forming a circular space for the rope core to pass through, and the plurality of shaping rollers are evenly distributed; Each shaping roller is individually sleeved on a fixed shaft, and the fixed shafts on which the shaping rollers are installed are connected and fixed by a fixing frame. The fixing frame and the fixed shaft are connected to form a whole. Support frames are respectively connected on both sides of the whole formed by the connection of the fixing frame and the fixed shaft. The support frame is supported by supporting legs. Uniform pressure is applied to the periphery of the rope core by the evenly arranged shaping rollers, and the resin glue on the several ultra-high molecular weight polyethylene fiber strands constituting the rope core is evenly distributed again by extrusion.

6. The method for preparing an ultra-high molecular weight polyethylene fiber electric power rope according to claim 1, characterized in that: In step S9, the finishing liquid includes organosilicon and fluoropolymer oleophobic and water-repellent agent, and the mass ratio of the organosilicon to the fluoropolymer oleophobic and water-repellent agent is 3-4:5.

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