Saline-alkali-resistant sheath material for dragging cable, preparation method of sheath material and cable

Abstract

The invention discloses a sheath material for a saline-alkaline-resistant dragging cable, a preparation method of the sheath material, the cable and the sheath material. The sheath material is prepared from the following raw materials in parts by weight: 40 to 45 parts of chlorinated polyethylene, 1.5 to 2.0 parts of dicumyl peroxide vulcanizing agent, 2 to 2.5 parts of triisocyanate vulcanizing agent, 0.1 to 0.3 part of ethylene thiourea accelerant, 0.05 to 0.15 part of anti-aging agent RD, 4 to 5 parts of metal oxide, 1 to 1.5 parts of paraffin, 8 to 10 parts of calcium carbonate, 15 to 21 parts of reinforcing agent, 1 to 1.5 parts of lead stearate, 0.5 to 1 part of lead sulfate tribasic, 1 to 1.5 parts of ultraviolet light absorber, 3 to 5 parts of epoxidized soybean oil and 8 to 8 parts of chlorinated paraffin. 9 parts of antimony trioxide and 3-4 parts of antimony trioxide. The cable has the advantages of ultraviolet resistance, no salt deposition, water resistance, tensile resistance, cold resistance and the like, can be used for a long time in a special operating environment, has the service life of at least more than 3 years, and avoids frequent replacement of the cable by a user.

Description

Technical Field

[0001] The present invention belongs to the technical field of cables, and particularly relates to a sheath material for a salt-alkali resistant and drag-resistant cable, a preparation method thereof, and a cable. Background Art

[0002] Among the currently proven lithium resources, salt lake brine accounts for 58%, and lithium concentrate accounts for 26%. Salt lake mining generally uses salt lake boats. The cables dragged by the salt lake mining boats are 10 kV inlets. The cables are connected through shore-side patch cords. They float on the lake surface together with the extracted brine pipelines. As the mining boats move on the lake surface, the cables also float accordingly. The products need to have the characteristics of anti-ultraviolet, non-salt-forming, waterproof, tensile, anti-ultraviolet, cold-resistant, etc. Currently, the power supply cables used in salt lake mining boats generally use imported cables, which cannot meet the relevant requirements of salt lake mining enterprises in terms of both price and after-sales service. Therefore, it is particularly important to develop a cable with the characteristics of anti-ultraviolet, non-salt-forming, waterproof, tensile, anti-ultraviolet, cold-resistant, etc. to meet the special use environment. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a sheath material for a salt-alkali resistant and drag-resistant cable, a preparation method thereof, and a cable in view of the above deficiencies in the prior art. The cable has the advantages of non-salt-forming, waterproof, tensile, anti-ultraviolet, cold-resistant, etc., and can be used for a long time in a special operating environment. The service life of the cable is at least more than 3 years, avoiding frequent cable replacement by users.

[0004] The technical solution adopted to solve the technical problem of the present invention is to provide a sheath material for a salt-alkali resistant and drag-resistant cable, and its raw material formula includes by weight:

[0005]

[0006] Preferably, the metal oxide is any one or more of magnesium oxide, calcium oxide, and lead oxide.

[0007] Preferably, the reinforcing agent is silica and semi-reinforcing carbon black N660.

[0008] Preferably, the weight of silica is 10 - 15 parts, and the weight of semi-reinforcing carbon black N660 is 5 - 6 parts.

[0009] Preferably, the ultraviolet absorber is any one or more of ultraviolet absorber UV-O, ultraviolet absorber UV-9, and ultraviolet absorber UV-531.

[0010] The present invention also provides a preparation method for the above-mentioned sheath material for a salt-alkali resistant and drag-resistant cable, including the following steps:

[0011] Weigh according to the formula of the above-mentioned sheathing material. First, add tribasic lead sulfate, metal oxide, lead stearate, antioxidant RD, and epoxidized soybean oil to chlorinated polyethylene, put them into an intermeshing machine to be evenly meshed, and then let it stand for 1 to 2 hours. At the same time, heat the open mill or internal mixer to 100°C to 110°C, adjust the roll gap to 0.1 to 0.2 mm, put the evenly mixed material on the two rolls for mixing. When the material becomes transparent and has no white particles, add calcium carbonate, reinforcing agent, ultraviolet absorber, chlorinated paraffin, antimony trioxide, paraffin, and ethylene thiourea accelerator, and triisocyanate vulcanizing agent to mix evenly. Finally, add dicumyl peroxide vulcanizing agent, then thin pass, make a triangle package, and put the mixed rubber material into a calender to make a sheet-shaped sheathing material for saline-alkali resistant drag cables.

[0012] The present invention also provides a saline-alkali resistant drag cable, including: a cable core, a tape wrapped outside the cable core, an inner sheath, a tensile reinforcement layer, and an outer sheath;

[0013] The cable core includes: a power line, a ground wire core, a monitoring line, and a semiconductive filling rubber strip. The ground wire core is arranged in the gap between the power lines, the monitoring line is arranged in the gap between the power lines, and the semiconductive filling rubber strip is arranged in the gap between the power lines;

[0014] The power line includes: a power line core, a conductor shield layer, a first insulating layer, an insulation shield layer, and a braided shield layer arranged in sequence from the inside to the outside. The braided shield layer is a copper wire braided shield layer or a fiber yarn braided shield layer;

[0015] The monitoring line includes: a monitoring line core and a second insulating layer arranged outside the monitoring line core;

[0016] The sheathing material of the inner sheath and / or the outer sheath is the above-mentioned sheathing material for saline-alkali resistant drag cables.

[0017] Preferably, the insulation shield layer includes: a first extruded semiconductive shield layer arranged outside the first insulating layer and a wrapped semiconductive nylon tape arranged outside the first extruded semiconductive shield layer;

[0018] The conductor shield layer includes: a first semiconductive nylon tape arranged outside the power line core and a second extruded semiconductive shield layer arranged outside the first semiconductive nylon tape;

[0019] The cable core further includes a second semiconductive nylon tape arranged outside the ground wire core;

[0020] The tensile reinforcement layer is an aramid fiber tensile fiber.

[0021] Preferably, the braided shield layer is braided outside the wrapped semiconductive nylon tape, and the braiding coverage rate is not less than 60%;

[0022] The aramid fiber tensile fiber is coated outside the inner sheath by means of knitting, and the overall knitting density is not less than 60%.

[0023] Preferably, there are 3 power lines, 1 monitoring wire core, and 2 ground wire cores. The monitoring wire core and the ground wire cores are evenly arranged between the 3 power lines.

[0024] Preferably, the inner sheath and / or the outer sheath are made of sheath material through an extrusion production process. The extrusion temperature of the extruder is 70 - 85°C, the steam pressure in the vulcanization pipeline of the extruder is 0.9 - 1.0 MPa, and the extrusion temperature is 170 - 180°C.

[0025] Preferably, the thickness of the first insulating layer is 9.0 - 10.0 mm, the thickness of the second insulating layer is 1.0 - 1.5 mm, the thickness of the inner sheath is 2.5 - 2.8 mm, and the thickness of the outer sheath is 4.5 - 4.8 mm.

[0026] The sheath material for the saline-alkali resistant drag cable in the present invention, its preparation method, and the cable. This cable has properties such as high flexibility, repeated curling performance, ultraviolet resistance, non-salt formation, waterproof, tensile resistance, ultraviolet resistance, cold resistance, etc. The conductor in the present invention adopts a class 5 soft conductor structure, adopts a multi-layer stranded structure, and adds an aramid fiber braided layer reinforcement layer to improve the tensile performance of the cable. At the same time, the aramid fiber braided layer can also well wrap the inner sheath to ensure that no local bulging occurs during the repeated curling process of the cable. Description of the Drawings

[0027] Figure 1 It is a schematic cross-sectional structure diagram of the saline-alkali resistant drag cable in Embodiments 2 - 6 of the present invention.

[0028] In the figure: 1 - power line core; 2 - conductor shielding layer; 3 - first insulating layer; 4 - insulating shielding layer; 5 - braided shielding layer; 6 - monitoring wire core; 7 - second insulating layer; 8 - ground wire core; 9 - tape; 10 - inner sheath; 11 - tensile reinforcement layer; 12 - outer sheath; 13 - semi-conductive filling rubber strip. Detailed Embodiments

[0029] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the drawings and specific embodiments.

[0030] The embodiments of this patent are described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below by referring to the drawings are exemplary and are only used to explain this patent and should not be construed as a limitation of this patent.

[0031] Embodiment 1

[0032] This embodiment provides a sheath material for saline-alkali resistant drag cables, and its raw material formula includes, by weight:

[0033]

[0034] This embodiment also provides a preparation method for the above-mentioned sheath material for saline-alkali resistant drag cables, including the following steps:

[0035] First, tribasic lead sulfate, metal oxide, lead stearate, antioxidant RD, and epoxidized soybean oil are added to chlorinated polyethylene, and then they are put into an intermeshing machine to be evenly meshed and left for 1 to 2 hours. At the same time, the temperature of an open mill or an internal mixer is raised to 100°C - 110°C, and the roll gap is adjusted to 0.1 - 0.2 mm. The uniformly mixed material is put on the double rolls for mixing. When the material becomes transparent and has no white particles, calcium carbonate, reinforcing agent, ultraviolet absorber, chlorinated paraffin, antimony trioxide, paraffin, and ethylene thiourea accelerator, and triisocyanate vulcanizing agent are added and mixed evenly. Finally, dicumyl peroxide vulcanizing agent is added, and then it is thin-sliced, made into triangular packages, and the mixed rubber is put into a calender to make a sheet-shaped sheath material for saline-alkali resistant drag cables.

[0036] This embodiment also provides a saline-alkali resistant drag cable, including: a cable core, a tape wrapped outside the cable core, an inner sheath, a tensile reinforcement layer, and an outer sheath;

[0037] The cable core includes: a power line, a ground wire core, a monitoring line, and a semi-conductive filling rubber strip. The ground wire core is arranged in the gap between the power lines, the monitoring line is arranged in the gap between the power lines, and the semi-conductive filling rubber strip is arranged in the gap between the power lines;

[0038] The power line includes: a power line core, a conductor shield layer, a first insulation layer, an insulation shield layer, and a braided shield layer arranged in sequence from the inside to the outside. The braided shield layer is a copper wire braided shield layer or a fiber yarn braided shield layer;

[0039] The monitoring line includes: a monitoring line core and a second insulation layer arranged outside the monitoring line core;

[0040] The sheath material of the inner sheath and / or the outer sheath is the above-mentioned sheath material for saline-alkali resistant drag cables.

[0041] The sheath material for saline-alkali resistant drag cables, its preparation method, and the cable in this embodiment. This cable has properties such as high flexibility, repeated curling performance, ultraviolet resistance, no salt formation, waterproof, tensile resistance, ultraviolet resistance, and cold resistance. In this embodiment, the conductor adopts a class 5 soft conductor structure, a multi-layer stranded structure is adopted, and an aramid fiber braided layer reinforcement layer is added to improve the tensile performance of the cable. At the same time, the aramid fiber braided layer can also well wrap the inner sheath to ensure that no local bulging occurs during the repeated curling process of the cable.

[0042] Example 2

[0043] This example provides a sheath material for a saline-alkali resistant drag cable, and its raw material formula includes, by weight:

[0044]

[0045]

[0046] Preferably, the metal oxide is any one or more of magnesium oxide, calcium oxide, and lead oxide.

[0047] Specifically, the metal oxide in this example is lead oxide.

[0048] Preferably, the reinforcing agent is silica and semi-reinforcing carbon black N660.

[0049] Specifically, the reinforcing agent in this example is silica and semi-reinforcing carbon black N660.

[0050] Preferably, the weight of silica is 10 - 15 parts, and the weight of semi-reinforcing carbon black N660 is 5 - 6 parts.

[0051] Specifically, in this example, there are 13 parts of silica and 5 parts of semi-reinforcing carbon black.

[0052] Preferably, the ultraviolet absorber is any one or more of ultraviolet absorber UV-O, ultraviolet absorber UV-9, and ultraviolet absorber UV-531.

[0053] Specifically, the ultraviolet absorber is ultraviolet absorber UV-9.

[0054] The preparation of the chlorinated polyethylene sheath adopts dicumyl peroxide (DCP) vulcanizing agent, triisocyanate (TAIC) vulcanizing agent, and metal oxide vulcanization system, which can effectively ensure the heat aging performance of the rubber compound.

[0055] The metal oxide is one or more of magnesium oxide, calcium oxide, and lead oxide, preferably lead oxide, to improve the waterproof performance of the sheath.

[0056] Adding a stabilizer can effectively absorb hydrogen chloride gas generated during high-temperature vulcanization. The stabilizer is the combined action of lead stearate, calcium carbonate, antioxidant RD, metal oxide, tribasic lead sulfate, etc.

[0057] Adding a reinforcing agent can effectively improve the physical and mechanical properties and electrical properties of the rubber compound. Since carbon black has certain conductivity, the addition of semi-reinforcing carbon black is required to replace part of the role of carbon black or silica.

[0058] Adding an ultraviolet absorber to the formulation system can improve the ultraviolet resistance of the rubber compound. The ultraviolet absorber is one or more of UV-0, UV-9, and UV-531.

[0059] Specifically, this embodiment provides a sheath material for a salt-alkali resistant and drag-resistant cable. Its raw material formulation includes, by weight:

[0060] 43 parts of chlorinated polyethylene powder, 1.8 parts of DCP, 2.5 parts of TAIC, 0.3 parts of NA22, 0.1 part of antioxidant RD, 4.5 parts of lead oxide, 1.3 parts of paraffin wax, 9 parts of chlorinated paraffin, 8.5 parts of calcium carbonate, 13 parts of white carbon black, 5 parts of semi-reinforcing carbon black, 1.5 parts of lead stearate, 1 part of tribasic lead sulfate, 1.5 parts of ultraviolet absorber UV-9, 3 parts of epoxy soybean oil, and 4 parts of antimony trioxide.

[0061] This embodiment also provides a preparation method for the above-mentioned sheath material for a salt-alkali resistant and drag-resistant cable, including the following steps:

[0062] Weigh according to the formulation of the sheath material. First, add tribasic lead sulfate, metal oxides, lead stearate, antioxidant RD, and epoxy soybean oil to a certain amount of chlorinated polyethylene powder, put them into a high-speed meshing machine to mesh evenly, and then let it stand for 1 hour. At the same time, heat the open mill or internal mixer to 110°C, adjust the roll gap to 0.15 mm, put the evenly mixed material on the two rolls for mixing. When the material becomes transparent and has no white particles, add calcium carbonate, reinforcing agent, ultraviolet absorber, chlorinated paraffin, antimony trioxide, paraffin wax, and ethylene thiourea accelerator, and triisocyanate vulcanizing agent to mix evenly. Finally, add dicumyl peroxide vulcanizing agent, then thin pass, make triangular bales, and put the mixed rubber compound into a calender to make a sheet-shaped sheath material for a salt-alkali resistant and drag-resistant cable.

[0063] As Figure 1 shown, this embodiment also provides a salt-alkali resistant and drag-resistant cable, including: a cable core, a tape 9 arranged outside the cable core, an inner sheath 10, a tensile reinforcement layer 11, and an outer sheath 12;

[0064] The cable core includes: a power line, a ground wire core 8, a monitoring line, and a semi-conductive filling rubber strip 13. The ground wire core is arranged in the gap between the power lines, the monitoring line is arranged in the gap between the power lines, and the semi-conductive filling rubber strip is arranged in the gap between the power lines;

[0065] The power line includes: a power line core 1, a conductor shielding layer 2, a first insulating layer 3, an insulation shielding layer 4, and a braided shielding layer 5 arranged from the inside to the outside. The braided shielding layer 5 is a copper wire braided shielding layer or a fiber yarn braided shielding layer;

[0066] The monitoring line includes: a monitoring line core 6 and a second insulating layer 7 arranged outside the monitoring line core 6;

[0067] The sheath material of the inner sheath layer 10 and / or the outer sheath layer 12 is the above-mentioned sheath material for the saline-alkali resistant drag cable.

[0068] Specifically, in this embodiment, the sheath materials of the inner sheath layer 10 and the outer sheath layer 12 are the above-mentioned sheath materials for the saline-alkali resistant drag cable.

[0069] Preferably, the power core 1, the monitoring core 6, and the ground core are all conductive cores, and the conductive cores are formed by stranding multiple strands of copper wires or tinned copper wires and then stranding again. The elongation at break of a single copper wire or tinned copper wire in the conductive core is controlled within 25 ± 2%.

[0070] Specifically, in this embodiment, the wrapping tape is a non-woven fabric tape. The cable core is tightened by the non-woven fabric tape. The power core 1, the monitoring core 6, and the ground core 8 are formed by stranding multiple strands of 5 or 6 category extra-soft copper wires. To ensure the repeated curling performance of the cable, the elongation at break of each single wire is controlled within 25% ± 2.

[0071] The inner sheath layer is made of the above-mentioned chlorinated polyethylene sheath compound material, which can effectively ensure the regularity of the insulated core when the cable is repeatedly bent, and there will be no phenomena of twisting deformation and bulging.

[0072] The outer sheath layer is extruded with the above-mentioned chlorinated polyethylene sheath compound material, which has the advantages of anti-ultraviolet, non-salt-forming, waterproof, tensile, anti-ultraviolet, cold-resistant, etc., and the tensile strength ≥ 15 Mpa.

[0073] The inner sheath layer 10 and / or the outer sheath layer 12 is extruded from the above-mentioned sheath material.

[0074] Preferably, the insulation shielding layer 4 includes: a first extruded semi-conductive shielding layer disposed outside the first insulation layer 3, and a wrapped semi-conductive nylon tape disposed outside the first extruded semi-conductive shielding layer;

[0075] The conductor shielding layer 2 includes: a first semi-conductive nylon tape disposed outside the power core 1, and a second extruded semi-conductive shielding layer disposed outside the first semi-conductive nylon tape;

[0076] The cable core further includes a second semi-conductive nylon tape disposed outside the ground core 8;

[0077] The tensile reinforcement layer is aramid fiber for tensile strength.

[0078] The first semi-conductive nylon tape is overlapped and wrapped outside the power core 1, and the second semi-conductive nylon tape is overlapped and wrapped outside the ground core 8. The conductor shielding layer 2 is specific to the power line. The first insulation layer 3 is a 10 kV ethylene propylene rubber insulation layer, and the second insulation layer 7 is a 10 kV ethylene propylene rubber insulation layer. The first insulation layer 3 exists in the power line, and the second insulation layer 7 exists in the monitoring line. The ground core does not need to be extruded with an insulation layer, and the insulation shielding layer 4 is specific to the power line.

[0079] The tensile strength of the first insulating layer 3 and the second insulating layer 7 is ≥6.5 MPa, and the elongation at break is not less than 300%.

[0080] Preferably, the braided shielding layer is braided outside the wrapped semiconductive nylon tape, and the braiding coverage rate is not less than 60%;

[0081] The aramid fiber tensile fiber is wrapped outside the inner sheath by a braiding method, and the overall braiding density is not less than 60%, which can further enhance the tensile capacity of the cable.

[0082] Preferably, there are 3 power lines, 1 monitoring core wire, and 2 ground wire cores. The monitoring core wire and the ground wire cores are evenly arranged between the 3 power lines.

[0083] In this embodiment, the inner sheath 10 and / or the outer sheath 12 are made of a sheath material through an extrusion production process. The extrusion temperature of the extruder is 70°C, the steam pressure in the vulcanization pipeline of the extruder is 1.0 MPa, and the extrusion temperature is 175°C.

[0084] In this embodiment, the thickness of the first insulating layer 3 is 9.0 mm, the thickness of the second insulating layer 7 is 1.2 mm, the thickness of the inner sheath 10 is 2.8 mm, and the thickness of the outer sheath is 4.8 mm.

[0085] The sheath material for the saline-alkali resistant drag cable, its preparation method, and the cable in this embodiment. This cable has high flexibility, the performance of repeated curling, anti-ultraviolet, non-salt-forming, waterproof, tensile, anti-ultraviolet, cold-resistant and other properties. In this embodiment, the conductor adopts a class 5 soft conductor structure, adopts a multi-layer stranded structure, and adds an aramid fiber braided layer reinforcement layer to improve the tensile performance of the cable. At the same time, the aramid fiber braided layer can also well wrap the inner sheath to ensure that there will be no local bulging phenomenon during the repeated curling process of the cable. By adding fumed silica and reinforcing carbon black to the sheath material during mixing, the wear resistance of the sheath material is improved. Adding a certain amount of ultraviolet absorber improves the ultraviolet resistance of the cable. At the same time, the selection of the reinforcing agent and the stabilizer is adjusted accordingly to ensure the waterproof and saline-alkali resistant properties of the sheath material. The cable prepared in this way can ensure that the cable can continuously work in a special environment.

[0086]

[0087]

[0088] Table 1

[0089] The above items in Table 1 are all mechanical properties and are detected according to the detection methods specified in GB / T 2951.11. Compared with the comparative example in Examples 2 - 6, the cable sheath has higher tensile strength, strong aging resistance, and at the same time, the waterproof performance, the ability to resist salt and alkali, and the ability to resist ultraviolet rays are further improved, which can meet the actual working conditions of the cable used in salt lake exploitation.

[0090] Example 3

[0091] This example provides a sheath material for a salt - alkali resistant and drag - resistant cable. Its raw material formula includes, by weight:

[0092] 42 parts of chlorinated polyethylene powder, 2 parts of DCP, 2.3 parts of TAIC, 0.2 part of NA22, 0.1 part of antioxidant RD, 5 parts of lead oxide, 1.5 parts of paraffin wax, 8 parts of chlorinated paraffin, 8 parts of calcium carbonate, 13.4 parts of white carbon black, 6 parts of semi - reinforcing carbon black, 1 part of lead stearate, 1 part of tribasic lead sulfate, 1.5 parts of ultraviolet absorber UV - 9, 5 parts of epoxidized soybean oil, 3 parts of antimony trioxide.

[0093] This example also provides a preparation method for the above - mentioned sheath material for a salt - alkali resistant and drag - resistant cable, including the following steps:

[0094] Weigh according to the formula of the sheath material. First, add tribasic lead sulfate, metal oxides, lead stearate, antioxidant RD, and epoxidized soybean oil to a certain amount of chlorinated polyethylene powder, put them into a high - speed meshing machine to be meshed evenly, and then place them for 1.5 hours. At the same time, heat the open mill or internal mixer to 100 °C, adjust the roll gap to 0.1 mm, put the evenly mixed material on the two - roll mill for mixing. When the material becomes transparent and has no white particles, add calcium carbonate, reinforcing agent, ultraviolet absorber, chlorinated paraffin, antimony trioxide, paraffin wax, and ethylene thiourea accelerator, triisocyanate vulcanizing agent and mix them evenly. Finally, add dicumyl peroxide vulcanizing agent, then thin - pass, make a triangular package, and put the mixed rubber into a calender to make a sheet - shaped sheath material for a salt - alkali resistant and drag - resistant cable.

[0095] As Figure 1 shown, this example also provides a salt - alkali resistant and drag - resistant cable, including: a cable core, a tape 9 arranged outside the cable core, an inner sheath 10, a tensile reinforcement layer 11, and an outer sheath 12;

[0096] The cable core includes: a power line, a ground wire core 8, a monitoring line, and a semi - conductive filling rubber strip. The ground wire core is arranged in the gap between the power lines, the monitoring line is arranged in the gap between the power lines, and the semi - conductive filling rubber strip is arranged in the gap between the power lines;

[0097] The power cable includes: a power cable core 1, a conductor shielding layer 2, a first insulating layer 3, an insulating shielding layer 4, and a braided shielding layer 5 arranged in sequence from the inside to the outside. The braided shielding layer 5 is a copper wire braided shielding layer or a fiber yarn braided shielding layer;

[0098] The monitoring cable includes: a monitoring cable core 6 and a second insulating layer 7 arranged outside the monitoring cable core 6;

[0099] The sheath material of the inner sheath layer 10 and / or the outer sheath layer 12 is the above-mentioned sheath material for the saline-alkali resistant drag cable.

[0100] In this embodiment, the inner sheath layer 10 and / or the outer sheath layer 12 are made of the sheath material through an extrusion production process. The extrusion temperature of the extruder is 80°C, the steam pressure of the vulcanization pipeline of the extruder is 0.95 MPa, and the extrusion temperature is 170°C.

[0101] In this embodiment, the thickness of the first insulating layer 3 is 9.5 mm, the thickness of the second insulating layer 7 is 1.5 mm, the thickness of the inner sheath layer 10 is 2.6 mm, and the thickness of the outer sheath layer is 4.7 mm.

[0102] The sheath material for the saline-alkali resistant drag cable, its preparation method, and the cable in this embodiment. This cable has properties such as high flexibility, repeated curling performance, anti-ultraviolet, non-salt-forming, waterproof, tensile resistance, anti-ultraviolet, and cold resistance. In this embodiment, the conductor adopts a class 5 soft conductor structure, uses a multi-layer stranded structure, and adds an aramid fiber braided layer reinforcement layer to improve the tensile performance of the cable. At the same time, the aramid fiber braided layer can also well wrap the inner sheath layer to ensure that no local bulging occurs during the repeated curling process of the cable.

[0103] Example 4

[0104] This embodiment provides a sheath material for a saline-alkali resistant drag cable, and its raw material formula includes by weight:

[0105] 40.5 parts of chlorinated polyethylene powder, 1.5 parts of DCP, 2 parts of TAIC, 0.3 part of NA22, 0.1 part of antioxidant RD, 5 parts of lead oxide, 1.5 parts of paraffin wax, 8 parts of chlorinated paraffin, 8 parts of calcium carbonate, 15 parts of white carbon black, 6 parts of semi-reinforcing carbon black, 1.5 parts of lead stearate, 1 part of tribasic lead sulfate, 1.5 parts of ultraviolet absorber UV-9, 5 parts of epoxidized soybean oil, 3.1 parts of antimony trioxide.

[0106] This embodiment also provides a preparation method for the above-mentioned sheath material for a saline-alkali resistant drag cable, including the following steps:

[0107] Weigh according to the formula of the above-mentioned sheathing material. First, add tribasic lead sulfate, metal oxide, lead stearate, antioxidant RD, and epoxidized soybean oil to a certain amount of chlorinated polyethylene powder. Put them into a high-speed meshing machine and mesh evenly, then let it stand for 2 hours. At the same time, heat the open mill or internal mixer to 105°C, adjust the roll gap to 0.2 mm, and put the evenly mixed material on the two rolls for mixing. When the material becomes transparent and has no white particles, add calcium carbonate, reinforcing agent, ultraviolet absorber, chlorinated paraffin, antimony trioxide, paraffin, and ethylene thiourea accelerator, and triisocyanate vulcanizing agent and mix evenly. Finally, add diisopropylbenzene peroxide vulcanizing agent, then thin pass, make triangular bales, and put the mixed rubber compound into a calender to make a sheet-shaped sheathing material for saline-alkali resistant drag cables.

[0108] As Figure 1 shown, this embodiment also provides a saline-alkali resistant drag cable, including: a cable core, a tape 9 arranged outside the cable core, an inner sheath 10, a tensile reinforcement layer 11, and an outer sheath 12;

[0109] The cable core includes: a power line, a ground wire core 8, a monitoring line, and a semi-conductive filling rubber strip. The ground wire core is arranged in the gap between the power lines, the monitoring line is arranged in the gap between the power lines, and the semi-conductive filling rubber strip is arranged in the gap between the power lines;

[0110] The power line includes: a power line core 1, a conductor shielding layer 2, a first insulating layer 3, an insulation shielding layer 4, and a braided shielding layer 5 arranged from the inside to the outside. The braided shielding layer 5 is a copper wire braided shielding layer or a fiber yarn braided shielding layer;

[0111] The monitoring line includes: a monitoring line core 6 and a second insulating layer 7 arranged outside the monitoring line core 6;

[0112] The sheathing material of the inner sheath 10 and / or the outer sheath 12 is the above-mentioned sheathing material for saline-alkali resistant drag cables.

[0113] In this embodiment, the inner sheath 10 and / or the outer sheath 12 is made of the sheathing material through an extrusion production process. The extrusion temperature of the extruder is 85°C, the steam pressure in the vulcanization pipeline of the extruder is 0.9 MPa, and the extrusion temperature is 180°C.

[0114] In this embodiment, the thickness of the first insulating layer 3 is 10.0 mm, the thickness of the second insulating layer 7 is 1.0 mm, the thickness of the inner sheath 10 is 2.5 mm, and the thickness of the outer sheath is 4.5 mm.

[0115] The sheathing material for saline-alkali resistant drag cables in this embodiment, its preparation method, and the cable. This cable has properties such as high flexibility, repeated curling performance, ultraviolet resistance, non-salt formation, waterproofing, tensile strength, ultraviolet resistance, cold resistance, etc. In this embodiment, the conductor adopts a Class 5 soft conductor structure, with a multi-layer stranded structure, and an aramid fiber braided layer reinforcement layer is added to improve the tensile performance of the cable. At the same time, the aramid fiber braided layer can also well wrap the inner sheath to ensure that there is no local bulging phenomenon during the repeated curling process of the cable.

[0116] Comparative Example 1

[0117] This comparative example provides a sheathing material for saline-alkali resistant drag cables, and its raw material formula includes, by weight:

[0118] 45 parts of chlorinated polyethylene powder, 2 parts of DCP, 2.5 parts of TAIC, 0.3 part of NA22, 0.2 part of antioxidant RD, 5 parts of magnesium oxide, 1.5 parts of paraffin wax, 9 parts of chlorinated paraffin, 15 parts of calcium carbonate, 10 parts of carbon black, 1.5 parts of lead stearate, 1 part of tribasic lead sulfate, 3 parts of dioctyl phthalate, 4 parts of antimony trioxide.

[0119] Example 5

[0120] This example provides a sheathing material for saline-alkali resistant drag cables, and its raw material formula includes, by weight:

[0121] 45 parts of chlorinated polyethylene powder, 1.6 parts of DCP, 2.2 parts of TAIC, 0.1 part of NA22, 0.05 part of antioxidant RD, 4 parts of magnesium oxide, 1.0 part of paraffin wax, 8.5 parts of chlorinated paraffin, 10 parts of calcium carbonate, 10 parts of white carbon black, 5.5 parts of semi-reinforcing carbon black, 1.2 parts of lead stearate, 0.5 part of tribasic lead sulfate, 0.5 part of ultraviolet absorber UV-0, 0.5 part of ultraviolet absorber UV-531, 4 parts of epoxy soybean oil, 3.5 parts of antimony trioxide.

[0122] The metal oxide in this example is magnesium oxide.

[0123] Specifically, the ultraviolet absorbers in this example are ultraviolet absorber UV-0 and ultraviolet absorber UV-531, and the weight ratio is 1:1

[0124] This example also provides a preparation method for the above-mentioned sheathing material for saline-alkali resistant drag cables, including the following steps:

[0125] Weigh according to the formula of the above-mentioned sheath material. First, add tribasic lead sulfate, metal oxide, lead stearate, antioxidant RD, and epoxy soybean oil to a certain amount of chlorinated polyethylene powder. Put them into a high-speed meshing machine and mesh evenly, then let it stand for 1.3 hours. At the same time, heat the open mill or internal mixer to 103 °C, adjust the roll gap to 0.12 mm, and put the evenly mixed material on the two rolls for mixing. When the material becomes transparent and has no white particles, add calcium carbonate, reinforcing agent, ultraviolet absorber, chlorinated paraffin, antimony trioxide, paraffin, and ethylene thiourea accelerator, and triisocyanate vulcanizing agent and mix evenly. Finally, add diisopropylbenzene peroxide vulcanizing agent, then thin pass, make triangular bales, and put the mixed rubber into a calender to make a sheet-shaped sheath material for saline-alkali resistant drag cables.

[0126] As Figure 1 shown, this embodiment also provides a saline-alkali resistant drag cable, including: a cable core, a tape 9 arranged outside the cable core, an inner sheath 10, a tensile reinforcement layer 11, and an outer sheath 12;

[0127] The cable core includes: a power line, a ground wire core 8, a monitoring line, and a semi-conductive filling rubber strip. The ground wire core is arranged in the gap between the power lines, the monitoring line is arranged in the gap between the power lines, and the semi-conductive filling rubber strip is arranged in the gap between the power lines;

[0128] The power line includes: a power line core 1, a conductor shielding layer 2, a first insulating layer 3, an insulation shielding layer 4, and a braided shielding layer 5 arranged from the inside to the outside. The braided shielding layer 5 is a copper wire braided shielding layer or a fiber yarn braided shielding layer;

[0129] The monitoring line includes: a monitoring line core 6 and a second insulating layer 7 arranged outside the monitoring line core 6;

[0130] The sheath material of the inner sheath 10 and / or the outer sheath 12 is the above-mentioned sheath material for saline-alkali resistant drag cables.

[0131] The sheath material for saline-alkali resistant drag cables, its preparation method, and the cable in this embodiment. This cable has properties such as high flexibility, repeated curling performance, ultraviolet resistance, no salt formation, waterproof, tensile strength, ultraviolet resistance, and cold resistance. In this embodiment, the conductor adopts a class 5 soft conductor structure, uses a multi-layer stranded structure, and adds an aramid fiber braided layer reinforcement layer to improve the tensile performance of the cable. At the same time, the aramid fiber braided layer can also well wrap the inner sheath to ensure that there is no local bulging phenomenon during the repeated curling process of the cable.

[0132] Example 6

[0133] This embodiment provides a sheath material for saline-alkali resistant drag cables. Its raw material formula includes by weight:

[0134] 40 parts of chlorinated polyethylene powder, 1.7 parts of DCP, 2.3 parts of TAIC, 0.2 parts of NA22, 0.15 parts of antioxidant RD, 2 parts of magnesium oxide, 2.2 parts of calcium oxide, 1.2 parts of paraffin wax, 8.7 parts of chlorinated paraffin, 9 parts of calcium carbonate, 15 parts of silica white, 1.3 parts of lead stearate, 0.8 parts of tribasic lead sulfate, 1.2 parts of ultraviolet absorber UV-9, 4.5 parts of epoxidized soybean oil, 3.7 parts of antimony trioxide.

[0135] The metal oxides in this embodiment are magnesium oxide and calcium oxide.

[0136] The reinforcing agent in this embodiment is silica white.

[0137] This embodiment also provides a preparation method of the above-mentioned sheath material for saline-alkali resistant drag cable, including the following steps:

[0138] Weigh according to the formula of the above-mentioned sheath material. First, add tribasic lead sulfate, metal oxides, lead stearate, antioxidant RD, and epoxidized soybean oil into a certain amount of chlorinated polyethylene powder, put them into a high-speed meshing machine to be evenly meshed, and then place for 1.7 hours. At the same time, heat the open mill or internal mixer to 108 °C, adjust the roll gap to 0.2 mm, put the evenly mixed material on the two rolls for mixing. When the material becomes transparent and has no white particles, add calcium carbonate, reinforcing agent, ultraviolet absorber, chlorinated paraffin, antimony trioxide, paraffin wax, ethylene thiourea accelerator, and triisocyanate vulcanizing agent and mix them evenly. Finally, add dicumyl peroxide vulcanizing agent, then thin pass, make triangular packages, and put the mixed rubber into a calender to make a sheet-shaped sheath material for saline-alkali resistant drag cable.

[0139] As Figure 1 shown, this embodiment also provides a saline-alkali resistant drag cable, including: a cable core, a tape 9 arranged outside the cable core, an inner sheath layer 10, a tensile reinforcement layer 11, and an outer sheath layer 12;

[0140] The cable core includes: a power line, a ground wire core 8, a monitoring line, and a semi-conductive filling rubber strip. The ground wire core is arranged in the gap between the power lines, the monitoring line is arranged in the gap between the power lines, and the semi-conductive filling rubber strip is arranged in the gap between the power lines;

[0141] The power line includes: a power line core 1, a conductor shielding layer 2, a first insulating layer 3, an insulation shielding layer 4, and a braided shielding layer 5 arranged from the inside to the outside in sequence. The braided shielding layer 5 is a copper wire braided shielding layer or a fiber yarn braided shielding layer;

[0142] The monitoring line includes: a monitoring line core 6 and a second insulating layer 7 arranged outside the monitoring line core 6;

[0143] The sheath material of the inner sheath layer 10 and / or the outer sheath layer 12 is the above-mentioned sheath material for saline-alkali resistant drag cable.

[0144] The sheath material for saline-alkali resistant drag cables in this embodiment, its preparation method, and the cable. The cable has properties such as high flexibility, repeated curling performance, ultraviolet resistance, non-salt formation, waterproofing, tensile strength, ultraviolet resistance, cold resistance, etc. In this embodiment, the conductor adopts a class 5 soft conductor structure, uses a multi-layer stranded structure, and adds an aramid fiber braided layer reinforcement layer to improve the tensile performance of the cable. At the same time, the aramid fiber braided layer can also well wrap the inner sheath to ensure that there is no local bulging phenomenon during the repeated curling of the cable.

[0145] It can be understood that the above embodiments are merely exemplary embodiments adopted to illustrate the principle of the present invention. However, the present invention is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also regarded as the protection scope of the present invention.

Claims

1. A sheath material for salt - alkali resistant drag cables, characterized in that, its raw material formula includes by weight:

2. The sheath material for salt - alkali resistant drag cables according to claim 1, characterized in that, The metal oxide is any one or more of magnesium oxide, calcium oxide, and lead oxide.

3. The sheath material for salt - alkali resistant drag cables according to claim 1, characterized in that, The reinforcing agent is silica and semi - reinforcing carbon black N660.

4. The sheath material for salt - alkali resistant drag cables according to claim 3, characterized in that, The weight of silica is 10 - 15 parts, and the weight of semi - reinforcing carbon black N660 is 5 - 6 parts.

5. The sheath material for salt - alkali resistant drag cables according to claim 1, characterized in that, The ultraviolet absorber is any one or more of ultraviolet absorber UV - O, ultraviolet absorber UV - 9, and ultraviolet absorber UV - 531.

6. A preparation method of the sheath material for salt - alkali resistant drag cables according to any one of claims 1 - 5, characterized in that, comprises the following steps: First, tribasic lead sulfate, metal oxide, lead stearate, antioxidant RD, and epoxidized soybean oil are added to chlorinated polyethylene, and they are put into an intermeshing machine to be meshed evenly and then left for 1 - 2 hours; at the same time, the open mill or internal mixer is heated to 100°C - 110°C, and the roll gap is adjusted to 0.1 - 0.2 mm. The uniformly mixed material is put on the two - roll for mixing. When the material becomes transparent and has no white particles, calcium carbonate, reinforcing agent, ultraviolet absorber, chlorinated paraffin, antimony trioxide, paraffin, and ethylene thiourea accelerator, and triisocyanate vulcanizing agent are added and mixed evenly. Finally, dicumyl peroxide vulcanizing agent is added, then thin - pass, make triangular bales, and the mixed rubber is put into a calender to make a sheet - shaped sheath material for salt - alkali resistant drag cables.

7. A salt - alkali resistant drag cable, characterized in that, comprises: a cable core, a tape wrapped outside the cable core, an inner sheath, a tensile strengthening layer, and an outer sheath; The cable core includes: power lines, a ground wire core, a monitoring line, and a semi - conductive filling rubber strip. The ground wire core is arranged in the gap between the power lines, the monitoring line is arranged in the gap between the power lines, and the semi - conductive filling rubber strip is arranged in the gap between the power lines; The power line includes: a power line core, a conductor shielding layer, a first insulating layer, an insulation shielding layer, and a braided shielding layer arranged from the inside to the outside. The braided shielding layer is a copper wire braided shielding layer or a fiber yarn braided shielding layer; The monitoring line includes: a monitoring line core and a second insulating layer arranged outside the monitoring line core; The sheath material of the inner sheath and / or the outer sheath is the sheath material for salt - alkali resistant drag cables according to any one of claims 1 - 5.

8. The salt - alkali resistant drag cable according to claim 7, characterized in that, The insulation shielding layer includes: a first extruded semi - conductive shielding layer arranged outside the first insulating layer and a wrapped semi - conductive nylon tape arranged outside the first extruded semi - conductive shielding layer; The conductor shielding layer includes: a first semi - conductive nylon tape arranged outside the power line core and a second extruded semi - conductive shielding layer arranged outside the first semi - conductive nylon tape; The cable core further includes a second semi - conductive nylon tape arranged outside the ground wire core; The tensile strengthening layer is aramid fiber for tensile strength.

9. The salt - alkali resistant drag cable according to claim 8, characterized in that, the braided shielding layer is braided outside the wrapped semi - conductive nylon tape, and the braiding coverage rate is not less than 60%; the aramid fiber tensile fiber is coated outside the inner sheath by a braiding method, and the overall braiding density is not less than 60%.

10. The salt - alkali resistant drag cable according to claim 7, characterized in that, there are 3 power lines, 1 monitoring wire core, and 2 ground wire cores. The monitoring wire core and the ground wire cores are evenly arranged between the 3 power lines.

11. The salt - alkali resistant drag cable according to claim 7, characterized in that, the inner sheath and / or the outer sheath are made of sheath material through an extrusion production process. The extrusion temperature of the extruder is 70 - 85 °C, the steam pressure in the vulcanization pipeline of the extruder is 0.9 - 1.0 MPa, and the extrusion temperature is 170 - 180 °C.

12. The salt - alkali resistant drag cable according to claim 7, characterized in that, the thickness of the first insulating layer is 9.0 - 10.0 mm, the thickness of the second insulating layer is 1.0 - 1.5 mm, the thickness of the inner sheath is 2.5 - 2.8 mm, and the thickness of the outer sheath is 4.5 - 4.8 mm.

Images