CN115376739A - Corrosion-resistant watertight cable and preparation process thereof - Google Patents
Corrosion-resistant watertight cable and preparation process thereof Download PDFInfo
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- CN115376739A CN115376739A CN202211007016.6A CN202211007016A CN115376739A CN 115376739 A CN115376739 A CN 115376739A CN 202211007016 A CN202211007016 A CN 202211007016A CN 115376739 A CN115376739 A CN 115376739A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/28—Protection against damage caused by moisture, corrosion, chemical attack or weather
- H01B7/2806—Protection against damage caused by corrosion
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/06—Insulating conductors or cables
- H01B13/14—Insulating conductors or cables by extrusion
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/22—Sheathing; Armouring; Screening; Applying other protective layers
- H01B13/24—Sheathing; Armouring; Screening; Applying other protective layers by extrusion
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/22—Sheathing; Armouring; Screening; Applying other protective layers
- H01B13/26—Sheathing; Armouring; Screening; Applying other protective layers by winding, braiding or longitudinal lapping
- H01B13/2606—Sheathing; Armouring; Screening; Applying other protective layers by winding, braiding or longitudinal lapping by braiding
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/32—Filling or coating with impervious material
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
- H01B7/1835—Sheaths comprising abrasive charges
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
- H01B7/1875—Multi-layer sheaths
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
- H01B7/22—Metal wires or tapes, e.g. made of steel
- H01B7/228—Metal braid
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/28—Protection against damage caused by moisture, corrosion, chemical attack or weather
- H01B7/282—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable
- H01B7/2825—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable using a water impermeable sheath
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/28—Protection against damage caused by moisture, corrosion, chemical attack or weather
- H01B7/282—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable
- H01B7/285—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable by completely or partially filling interstices in the cable
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
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- Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables
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Abstract
The invention discloses a corrosion-resistant watertight cable and a preparation process thereof, and relates to the technical field of cable processing. Including a plurality of conduction units of the inside setting of protection unit and protection unit, the protection unit includes the oversheath of outmost setting and the inoxidizing coating that the inlayer set up, and be provided with the shielding layer that the one deck metal mesh was woven between oversheath and the inoxidizing coating, the inside central authorities of inoxidizing coating are provided with central tensile unit, a plurality of conduction units of annular array arrangement between central tensile unit and the protective layer inner wall, the conduction unit includes a plurality of conductors of the inside setting of first inner sheath and first inner sheath, the space packing between conductor and the first inner sheath is with the glue film that blocks water first. The invention overcomes the defects of the prior art, effectively improves the corrosion resistance of the outer sheath of the cable material, comprehensively improves the winding resistance and bending resistance of the cable, and ensures the service life of the cable in underwater use.
Description
Technical Field
The invention relates to the technical field of cable processing, in particular to a corrosion-resistant watertight cable and a preparation process thereof.
Background
The watertight cable is a high watertight and winding-resistant multi-core comprehensive cable suitable for the fields of ships, offshore oil platforms, deep sea resource detection and the like, and is also suitable for leading wires of various submersible motors, electric wires and cables used for stretching/dragging in deep water, submersible pumps and various underwater working electrical appliances to be connected from underwater to a power supply on water.
Because watertight cable's service environment is mostly for under water, generally for fresh water or sea water such as lake, rivers, need effectively guarantee its good leakproofness and waterproof nature, but because watertight cable often uses under water, it is great to receive pressure, and can receive certain power along with the rivers during in-service use, cause winding and the uneven phenomenon of buckling easily, the sea water contains certain salinity simultaneously, certain corrosivity has, can cause the damage of cable oversheath in the in-service use process, finally influence the life and the safety in utilization of cable, current watertight cable often only sets up the one deck water blocking layer at the skin of cable, guarantee waterproof performance, but still be used for limitedly to the corrosion-resistant and antiwind effect of buckling of cable.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the corrosion-resistant watertight cable and the preparation process thereof, which can effectively improve the corrosion resistance of the outer sheath of the cable material, comprehensively improve the winding resistance and bending resistance of the cable, and ensure the service life of the cable in underwater use.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a corrosion-resistant watertight cable, includes a plurality of conduction units of the inside setting of protection unit and protection unit, the protection unit includes the oversheath of outmost setting and the inoxidizing coating of inlayer setting, and is provided with the shielding layer that one deck metal mesh was woven between oversheath and the inoxidizing coating, the inside central authorities of inoxidizing coating are provided with central tensile unit, and annular array arranges a plurality of conduction units between central tensile unit and the protection inner wall, the conduction unit includes a plurality of conductors of the inside setting of first inner sheath and first inner sheath, the space packing between conductor and the first inner sheath inside has the glue film that blocks water first.
Preferably, the central tensile unit comprises a second inner sheath and an anti-drawing wire arranged in the center of the inner part of the second inner sheath, and a second water-blocking glue layer is filled between the anti-drawing wire and the inner wall of the second inner sheath.
Preferably, a third water-blocking glue layer is filled between the protective layer and the outer parts of the first inner sheath and the second inner sheath.
The preparation process of the corrosion-resistant watertight cable comprises the following steps:
(1) preparing water-blocking glue: mixing polymer polyol, isophorone diisocyanate, silicone resin, a silane coupling agent, polyvinyl alcohol, a crosslinking agent, fumed silica and a cosolvent to prepare a water-blocking adhesive for later use;
(2) preparation of conductive unit: coating the water-blocking glue on the outer parts of a plurality of conductors until the water-blocking glue does not drip, and extruding an ethylene/propylene copolymer rubber layer on the outer parts to prepare a conducting unit for later use;
(3) preparation of central tensile unit: coating the water-blocking glue on the outer part of the tensile wire until the water-blocking glue does not drip, and then extruding and wrapping an ethylene/propylene copolymer rubber layer on the outer part to prepare a central tensile unit for later use;
(4) cabling: arranging the central tensile unit in the center, arranging a plurality of conduction units on the outer ring surface, coating the water-blocking glue on the central tensile unit until no water drops flow, and then performing extrusion coating treatment by using a polyurethane insulating material to obtain a preformed cable;
(5) shielding treatment: weaving a metal net layer outside the preformed cable by adopting a soft copper wire to fix the preformed cable to obtain a preformed cable wrapped by shielding for later use;
(6) preparing a wear-resistant material: mixing low-density polyethylene, polyamide resin, EVA (ethylene-vinyl acetate), zinc oxide, nano boron nitride, modified nano calcium hydroxide, nano silicon dioxide, an accelerator, a plasticizer, an anti-aging agent, a silane coupling agent and a compatilizer to prepare a wear-resistant material for later use;
(7) cable forming: and (5) extruding and wrapping the exterior of the preformed cable wrapped by the shielding by adopting the wear-resistant material in the step (6) to obtain the corrosion-resistant watertight cable.
Preferably, the water-blocking glue in the step (1) comprises the following components in parts by weight: 60-80 parts of polymer polyol, 10-20 parts of silicon resin, 2-4 parts of silane coupling agent, 1-2 parts of cross-linking agent, 18-20 parts of fumed silica and 1-2 parts of catalyst.
Preferably, the preparation method of the modified nano calcium hydroxide in the step (6) comprises the following steps: the calcium chloride is mixed with ammonia water to prepare flaky nano calcium hydroxide, and the surface of the flaky nano calcium hydroxide mixed with polyacrylate is modified to obtain the modified nano calcium hydroxide.
Preferably, the modification mode of the flaky nano calcium hydroxide mixed polyacrylate is that flaky nano calcium hydroxide is added into a polyacrylate solution with the concentration of 5%, wherein the solvent is acetone, and the mixture is stirred, mixed and modified.
Preferably, in the step (6), the components for forming the wear-resistant material comprise the following components in parts by weight: 60-80 parts of low-density polyethylene, 10-15 parts of polyamide resin, 8-12 parts of EVA (ethylene-vinyl acetate), 2-4 parts of zinc oxide, 1-2 parts of nano boron nitride, 4-6 parts of modified nano calcium hydroxide, 1-3 parts of nano silicon dioxide, 0.4-0.8 part of accelerator, 0.8-1 part of plasticizer, 1-1.4 parts of anti-aging agent, 2-3 parts of silane coupling agent and 1-1.2 parts of compatilizer.
Preferably, the specific preparation method of the wear-resistant material in the step (6) comprises the following steps: melting and mixing the low-density polyethylene, the EVA mixed anti-aging agent, the compatilizer and the silane coupling agent, and carrying out graft granulation to obtain a material 1; then, mixing polyamide resin with zinc oxide, nano boron nitride, modified nano calcium hydroxide and nano silicon dioxide, melting, mixing and granulating to obtain a material 2; and mixing the material 1 and the material 2, adding a plasticizer, continuously mixing, and extruding to obtain the wear-resistant material.
Preferably, the melt mixing temperature of the material 1 is 135-165 ℃, the melt mixing temperature of the material 2 is 110-130 ℃, and the mixing and mixing temperature of the material 1 and the material 2 is 140-180 DEG C
Compared with the prior art, the invention provides a corrosion-resistant watertight cable and a preparation process thereof, and the corrosion-resistant watertight cable has the following beneficial effects:
1. according to the invention, the outer sheath, the protective layer, the first inner sheath, the first water-blocking adhesive layer and the third water-blocking adhesive layer are arranged, so that the cable can be effectively protected against water, a long-term water-blocking effect can be kept, and high water pressure can be borne, and the bearing capacity of the cable can be effectively improved through the arrangement of the central tensile unit and the shielding layer woven by the metal net, and meanwhile, the cable is prevented from being bent and wound in water, and the use safety and convenience are improved.
2. The water-blocking glue prepared by the invention can effectively ensure the water-blocking effect and simultaneously improve the compression resistance, the prepared wear-resistant material has excellent wear-resistant and corrosion-resistant effects, and simultaneously, the salt-resistant and corrosion-resistant effects are further ensured while the properties of the material are comprehensively improved by mixing the modified nano calcium hydroxide after a system is formed by low-density polyethylene, EVA and polyamide resin.
Drawings
Fig. 1 is a schematic cross-sectional structure of the cable of the present invention.
In the figure: 1. an outer sheath; 2. a shielding layer; 3. a protective layer; 4. a first inner sheath; 5. a conductor; 6. a first water-blocking adhesive layer; 7. a second inner sheath; 8. a second water-blocking adhesive layer; 9. wire drawing resistance; 10. and a third water-blocking adhesive layer.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, are used in the orientations and positional relationships indicated in the drawings, which are based on the orientations and positional relationships indicated in the drawings, and are used for convenience of description and simplicity of description, but do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
Example 1:
preparing water-blocking glue: mixing 70 parts of polymer polyol with 3 parts of isophorone diisocyanate, heating to 70 ℃, adding 15 parts of silicone resin, 5 parts of polyvinyl alcohol, 3 parts of silane coupling agent, 1 part of cross-linking agent, 19 parts of fumed silica and 2 parts of cosolvent after mixing reaction, and continuously and uniformly stirring to obtain the water-blocking adhesive.
Preparing a wear-resistant material:
(1) Mixing nano calcium chloride with ammonia water with the concentration of 3 mol/L according to the mass ratio of 1: 2, stirring and mixing for 1h at normal temperature, filtering and drying to obtain flaky nano calcium hydroxide, placing the flaky nano calcium hydroxide in a polyacrylate solution with the concentration of 5%, heating to 45 ℃, continuously stirring and modifying for 50min, filtering and drying to obtain modified nano calcium hydroxide for later use;
(2) Mixing 70 parts of low-density polyethylene, 10 parts of EVA (ethylene-vinyl acetate), 1.2 parts of anti-aging agent, 1 part of compatilizer and 2 parts of silane coupling agent, heating to 150 ℃, melting and mixing for 1 hour, and carrying out grafting granulation to obtain a material 1 for later use;
(3) Mixing 12 parts of polyamide resin with 3 parts of zinc oxide, 2 parts of nano boron nitride, 5 parts of modified nano calcium hydroxide and 2 parts of nano silicon dioxide, and performing melt mixing at the temperature of 120 ℃ for 1 hour to perform granulation to obtain a material 2 for later use;
(4) And mixing the materials 1 and 2, adding 1 part of plasticizer, heating to 170 ℃, mixing for 2 hours, and then extruding and granulating to obtain the wear-resistant material.
Example 2:
referring to fig. 1, preparation of a corrosion-resistant watertight cable:
(1) Coating the plurality of conductors 5 with the water-blocking glue in the embodiment 1 until no water drops, namely, forming a first water-blocking glue layer 6 outside the plurality of conductors 5 by the water-blocking glue, and then extruding ethylene/propylene copolymer rubber outside the first water-blocking glue layer 6 to form a first inner sheath 4, so that a conductive unit is integrally formed;
(2) Coating the anti-drawing wires 9 with the water-blocking glue in the embodiment 1 until no dripping occurs, namely forming a second water-blocking glue layer 8 prepared from the water-blocking glue outside the anti-drawing wires 9, and then forming a second inner sheath 7 outside the second water-blocking glue layer 8 by adopting ethylene/propylene copolymer rubber extrusion, so that a central tensile unit is integrally formed;
(3) Arranging a plurality of conducting units around the central tensile unit, coating and fixing the conducting units and the outside of the central tensile unit by using the water-blocking glue in the embodiment 1, so that the water-blocking glue forms a third water-blocking glue layer 10, and then performing extrusion coating treatment on the outside of the third water-blocking glue layer 10 by using a polyurethane insulating material to form a protective layer 3, thereby obtaining a preformed cable;
(4) And (3) weaving a metal mesh layer by using annealed copper wires and fixing the metal mesh layer outside the protective layer 3 to form a shielding layer 2, and extruding the wear-resistant material prepared in the embodiment 1 outside the shielding layer 2 to form an outer sheath 1, so as to obtain the corrosion-resistant watertight cable.
Example 3:
preparing water-blocking glue:
60 parts of polymer polyol and 2 parts of isophorone diisocyanate are mixed and heated to 70 ℃, 10 parts of silicon resin, 4 parts of polyvinyl alcohol, 2 parts of silane coupling agent, 1 part of cross-linking agent, 18 parts of fumed silica and 1 part of cosolvent are added after mixing reaction, and the mixture is continuously stirred uniformly to obtain the water-blocking adhesive.
Example 4:
preparing water-blocking glue:
mixing 80 parts of polymer polyol and 3 parts of isophorone diisocyanate, heating to 70 ℃, adding 20 parts of silicon resin, 6 parts of polyvinyl alcohol, 4 parts of silane coupling agent, 2 parts of cross-linking agent, 20 parts of fumed silica and 2 parts of cosolvent after mixing reaction, and continuously and uniformly stirring to obtain the water-blocking adhesive.
Example 5:
preparing a wear-resistant material:
(1) Mixing nano calcium chloride with ammonia water with the concentration of 3 mol/L according to the mass ratio of 1: 2, stirring and mixing for 1h at normal temperature, filtering and drying to obtain flaky nano calcium hydroxide, placing the flaky nano calcium hydroxide in a polyacrylate solution with the concentration of 5%, heating to 45 ℃, continuously stirring and modifying for 50min, filtering and drying to obtain modified nano calcium hydroxide for later use;
(2) Mixing 60 parts of low-density polyethylene, 8 parts of EVA (ethylene-vinyl acetate), 1 part of anti-aging agent, 1 part of compatilizer and 2 parts of silane coupling agent, heating to 150 ℃, melting and mixing for 1 hour, and carrying out graft granulation to obtain a material 1 for later use;
(3) Mixing 10 parts of polyamide resin with 2 parts of zinc oxide, 1 part of nano boron nitride, 4 parts of modified nano calcium hydroxide and 1 part of nano silicon dioxide, and performing melt mixing at the temperature of 120 ℃ for 1 hour to perform granulation to obtain a material 2 for later use;
(4) And (3) mixing the material 1 and the material 2, adding 0.8 part of plasticizer, heating to 170 ℃, mixing for 2 hours, and then extruding and granulating to obtain the wear-resistant material.
Example 6:
preparing a wear-resistant material:
(1) Mixing nano calcium chloride with ammonia water with the concentration of 3 mol/L according to the mass ratio of 1: 2, stirring and mixing for 1h at normal temperature, filtering and drying to obtain flaky nano calcium hydroxide, placing the flaky nano calcium hydroxide in a polyacrylate solution with the concentration of 5%, heating to 45 ℃, continuously stirring and modifying for 50min, filtering and drying to obtain modified nano calcium hydroxide for later use;
(2) Mixing 80 parts of low-density polyethylene, 12 parts of EVA (ethylene-vinyl acetate), 1.4 parts of anti-aging agent, 1.2 parts of compatilizer and 3 parts of silane coupling agent, heating to 150 ℃, melting and mixing for 1 hour, and carrying out graft granulation to obtain a material 1 for later use;
(3) Mixing 15 parts of polyamide resin with 4 parts of zinc oxide, 2 parts of nano boron nitride, 6 parts of modified nano calcium hydroxide and 3 parts of nano silicon dioxide, and melting and mixing at 120 ℃ for 1 hour for granulation to obtain a material 2 for later use;
(4) And mixing the materials 1 and 2, adding 1 part of plasticizer, heating to 170 ℃, mixing for 2 hours, and then extruding and granulating to obtain the wear-resistant material.
Comparative example 1:
preparing water-blocking glue:
mixing 80 parts of polymer polyol with 3 parts of isophorone diisocyanate, heating to 70 ℃, after mixing reaction, adding 6 parts of polyvinyl alcohol, 4 parts of silane coupling agent, 2 parts of crosslinking agent, 20 parts of fumed silica and 2 parts of cosolvent, and continuously and uniformly stirring to obtain the water-blocking adhesive.
Comparative example 2:
preparing a wear-resistant material:
(1) Mixing 70 parts of low-density polyethylene, 10 parts of EVA (ethylene-vinyl acetate), 1.2 parts of anti-aging agent, 1 part of compatilizer and 2 parts of silane coupling agent, heating to 150 ℃, melting and mixing for 1 hour, and carrying out grafting granulation to obtain a material 1 for later use;
(2) Mixing 12 parts of polyamide resin with 3 parts of zinc oxide, 2 parts of nano boron nitride, 5 parts of nano calcium hydroxide and 2 parts of nano silicon dioxide, and performing melt mixing at the temperature of 120 ℃ for 1 hour to perform granulation to obtain a material 2 for later use;
(4) And mixing the materials 1 and 2, adding 1 part of plasticizer, heating to 170 ℃, mixing for 2 hours, and then extruding and granulating to obtain the wear-resistant material.
And (3) detection:
1. the properties such as the colloid strength and the water resistance of the water-blocking glue in the above examples 1, 3 to 4 and comparative example 1 were measured, and the specific results are shown in the following table 1:
TABLE 1
| Group of | Example 1 | Example 3 | Example 4 | Comparative example 1 |
| Colloidal Strength (MPa) | 1.8 | 1.7 | 1.8 | 1.4 |
| Water-proof property | IP67 | IP67 | IP67 | IP67 |
From the above table, it can be seen that the water-blocking adhesive of the present invention has good strength and excellent water-proof property.
2. The conventional mechanical properties of the abrasive in the above examples 1, 5-6 and comparative example 2 and the mechanical properties after soaking in a solution with a salt content of 5% at a temperature of 60 ℃ for 90d were measured, and the results are shown in the following table 2:
TABLE 2
As can be seen from the above table, the material of the outer sheath 1 prepared by the invention has excellent mechanical properties and good seawater corrosion resistance.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (10)
1. The utility model provides a corrosion-resistant watertight cable, includes a plurality of conduction units of the inside setting of protective unit and protective unit, its characterized in that: the protection unit includes oversheath (1) of outmost setting and inoxidizing coating (3) of inlayer setting, and is provided with shielding layer (2) that the one deck metal mesh was woven between oversheath (1) and inoxidizing coating (3), the inside central authorities of inoxidizing coating (3) are provided with central tensile unit, and annular array arranges a plurality of conduction units between central tensile unit and inoxidizing coating (3) inner wall, the conduction unit includes a plurality of conductors (5) of first inner sheath (4) and the inside setting of first inner sheath (4), the space packing between conductor (5) and first inner sheath (4) is first glue film (6) that blocks water.
2. The corrosion-resistant watertight cable and the preparation process thereof according to claim 1, wherein the central tensile unit comprises a second inner sheath (7) and a anti-drawing wire (9) arranged in the center inside the second inner sheath (7), and a second water-blocking glue layer (8) is filled between the anti-drawing wire (9) and the inner wall of the second inner sheath (7).
3. A corrosion-resistant watertight cable and a manufacturing process thereof according to claim 2, wherein a third water-blocking glue layer (10) is filled between the protective layer (3) and the exterior of the first inner sheath (4) and the second inner sheath (7).
4. The preparation process of the corrosion-resistant watertight cable is characterized by comprising the following steps of:
(1) preparing water-blocking glue: mixing polymer polyol, isophorone diisocyanate, silicone resin, a silane coupling agent, polyvinyl alcohol, a crosslinking agent, fumed silica and a cosolvent to prepare a water-blocking adhesive for later use;
(2) preparation of conductive unit: coating the water-blocking glue on the outer parts of a plurality of conductors until the water-blocking glue does not drip, and extruding an ethylene/propylene copolymer rubber layer on the outer parts to prepare a conducting unit for later use;
(3) preparation of central tensile unit: coating the water-blocking glue on the outer part of the tensile wire until the water-blocking glue does not drip, and then extruding and wrapping an ethylene/propylene copolymer rubber layer on the outer part to prepare a central tensile unit for later use;
(4) cabling: arranging the central tensile unit in the center, arranging a plurality of conduction units on the outer ring surface, coating the water-blocking glue on the central tensile unit until no water drops flow, and then performing extrusion coating treatment by using a polyurethane insulating material to obtain a preformed cable;
(5) shielding treatment: weaving a metal net layer outside the preformed cable by adopting a soft copper wire to fix the preformed cable to obtain a preformed cable wrapped by shielding for later use;
(6) preparing a wear-resistant material: mixing low-density polyethylene, polyamide resin, EVA (ethylene-vinyl acetate), zinc oxide, nano boron nitride, modified nano calcium hydroxide, nano silicon dioxide, an accelerator, a plasticizer, an anti-aging agent, a silane coupling agent and a compatilizer to prepare a wear-resistant material for later use;
(7) cable forming: and (4) extruding and wrapping the exterior of the preformed cable wrapped by the shielding by adopting the wear-resistant material in the step (6) to obtain the corrosion-resistant watertight cable.
5. A process for preparing a corrosion-resistant watertight cable according to claim 4, wherein: the water-blocking glue prepared in the step (1) comprises the following components in parts by weight: 60-80 parts of polymer polyol, 2-3 parts of isophorone diisocyanate, 10-20 parts of silicone resin, 4-6 parts of polyvinyl alcohol, 2-4 parts of silane coupling agent, 1-2 parts of cross-linking agent, 18-20 parts of fumed silica and 1-2 parts of cosolvent.
6. The preparation process of the corrosion-resistant watertight cable according to claim 4, wherein the preparation method of the modified nano calcium hydroxide in the step (6) comprises the following steps: the calcium chloride is mixed with ammonia water to prepare flaky nano calcium hydroxide, and the surface of the flaky nano calcium hydroxide mixed with polyacrylate is modified to obtain the modified nano calcium hydroxide.
7. The preparation process of the corrosion-resistant watertight cable according to claim 6, wherein the modification of the flaky nano calcium hydroxide mixed polyacrylate is performed by adding the flaky nano calcium hydroxide into a 5% polyacrylate solution, wherein the solvent is acetone, and stirring, mixing and modifying.
8. The process for preparing a corrosion-resistant watertight cable according to claim 4, wherein the components constituting the wear-resistant material in the step (6) are, by weight: 60-80 parts of low-density polyethylene, 10-15 parts of polyamide resin, 8-12 parts of EVA (ethylene-vinyl acetate), 2-4 parts of zinc oxide, 1-2 parts of nano boron nitride, 4-6 parts of modified nano calcium hydroxide, 1-3 parts of nano silicon dioxide, 0.4-0.8 part of accelerator, 0.8-1 part of plasticizer, 1-1.4 parts of anti-aging agent, 2-3 parts of silane coupling agent and 1-1.2 parts of compatilizer.
9. The process for preparing a corrosion-resistant watertight cable according to claim 4, wherein the specific preparation method of the wear-resistant material in the step (6) is as follows: melting and mixing the low-density polyethylene, the EVA mixed anti-aging agent, the compatilizer and the silane coupling agent, and carrying out graft granulation to obtain a material 1; then, mixing polyamide resin with zinc oxide, nano boron nitride, modified nano calcium hydroxide and nano silicon dioxide, melting, mixing and granulating to obtain a material 2; and mixing the material 1 and the material 2, adding a plasticizer, continuously mixing, and extruding to obtain the wear-resistant material.
10. The process for preparing a corrosion-resistant watertight cable according to claim 9, wherein the melt-kneading temperature of material 1 is 135-165 ℃, the melt-kneading temperature of material 2 is 110-130 ℃, and the temperature for mixing and kneading material 1 and material 2 is 140-180 ℃.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211007016.6A CN115376739A (en) | 2022-08-22 | 2022-08-22 | Corrosion-resistant watertight cable and preparation process thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211007016.6A CN115376739A (en) | 2022-08-22 | 2022-08-22 | Corrosion-resistant watertight cable and preparation process thereof |
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| CN115376739A true CN115376739A (en) | 2022-11-22 |
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| CN202211007016.6A Pending CN115376739A (en) | 2022-08-22 | 2022-08-22 | Corrosion-resistant watertight cable and preparation process thereof |
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| Country | Link |
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| CN (1) | CN115376739A (en) |
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- 2022-08-22 CN CN202211007016.6A patent/CN115376739A/en active Pending
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