A low-voltage, corrosion-resistant, bending-resistant, and tensile-resistant intelligent shore power cable

Abstract

The invention discloses a low-voltage, corrosion-resistant, bending-resistant and tensile-resistant intelligent shore power cable, comprising a main core, an optical fiber core, a signal core and a ground core, the main core, the optical fiber core, the signal core and the ground core are twisted into a cable core, a polyurethane elastic filling strip is filled in the internal gap of the cable core, a layer of polyurethane elastic inner sheath is extruded outside the cable core, a layer of Kevlar fiber braided reinforcement layer is woven, and finally a layer of outer sheath is extruded. The present invention is filled with a modified polyurethane elastic filling strip in the gap of the cable core, which has good anti-twisting, tensile and extrusion effects; the present invention uses carboxyl-terminated nitrile rubber as a toughening agent, wherein the carboxyl group reacts with the phenolic hydroxyl group of the boron phenolic resin to generate a new ester bond, which effectively improves the toughness and shear strength of the composite material, and uses the modified polyurethane material as the central material of the cable, because it has good toughness and resilience, it can play a better compression effect, and ensure the stability and strength of the overall structure of the cable.

Description

Technical Field

[0001] The present invention relates to the technical field of cables, and in particular to a low-voltage, corrosion-resistant, bending-resistant, and tensile-resistant intelligent shore power cable. Background Art

[0002] After the ship docks, there are still people staying on the ship. In the past, fuel-fired power generation was used to ensure the daily needs of these people. However, fuel-fired power generation will cause atmospheric pollution, so a cable connecting the ship and the dock power supply box is used in large quantities. This cable is collectively called shore power cable. When the ship docks, the shore power cable provides clean electricity for the personnel to continue working and living on the ship, which significantly reduces the cost of use and avoids environmental pollution. Usually, the shore power cable is wound on a reel. After the ship docks, the cable is pulled out from the reel and connected to the power supply box on the shore of the dock. Therefore, the shore power cable needs to have good safety, corrosion resistance, wear resistance, bending resistance and tensile strength. Summary of the invention

[0003] Based on the technical problems existing in the background technology, the present invention proposes a low-voltage, corrosion-resistant, bending-resistant and tensile-resistant intelligent shore power cable.

[0004] The technical solution adopted by the present invention is:

[0005] A low-voltage, corrosion-resistant, bending-resistant and tensile-resistant intelligent shore power cable comprises a main line core, an optical fiber core, a signal line core and a ground line core. The main line core, the optical fiber core, the signal line core and the ground line core are twisted into a cable core, the internal gap of the cable core is filled with a polyurethane elastic filling strip, a wrapping layer is wrapped around the outside of the cable core, a polyurethane elastic inner sheath is extruded outside the wrapping layer, a Kevlar fiber braided reinforcement layer is woven, and finally an outer sheath is extruded.

[0006] The main line core comprises a main conductor, an ethylene propylene rubber insulating layer is coated on the outside of the main conductor, and a plurality of main conductors are bundled and twisted and then coated on the outside with a tinned copper wire braided shielding layer.

[0007] The optical fiber core is coated with a PBT layer.

[0008] The signal wire core includes a signal conductor, which is coated with an EPDM rubber insulation layer. After the two signal conductors are twisted, they are coated with a tinned copper wire braided sub-shielding layer on the outside to form a twisted signal wire core. After the two twisted signal wire cores are twisted, they are coated with a tinned copper wire braided general shielding layer on the outside to form a signal wire core.

[0009] The ground wire core comprises a grounding conductor, an EPDM rubber insulating layer three is coated on the outside of the grounding conductor, and a plurality of grounding conductors are bundled and twisted and then coated on the outside with a tinned copper wire braided shielding layer two.

[0010] There are three main line cores.

[0011] The outer protective layer is a polyurethane elastic outer sheath.

[0012] The polyurethane elastic filling strip, the polyurethane elastic inner protective layer and the polyurethane elastic outer protective sheath are all made of modified polyurethane material.

[0013] The modified polyurethane material is composed of the following raw materials in parts by weight:

[0014] Polyurethane 80-100, triglycidyl isocyanurate 4-7, chlorinated paraffin 3-5, carboxyl-terminated nitrile rubber 10-14, boron phenolic resin 6-9, ethyl acetate 30-40, diethylenetriamine 2-3.

[0015] The preparation method of the modified polyurethane material comprises the following steps:

[0016] (1) taking a boron phenolic resin, adding it to ethyl acetate, stirring evenly, adding a carboxyl-terminated nitrile rubber, raising the temperature to 90-95° C., keeping the temperature and stirring for 1-2 hours, cooling the material, and obtaining a composite solution;

[0017] (2) mixing triglycidyl isocyanurate and polyurethane, and stirring at 70-75° C. for 1-2 hours to obtain pretreated polyurethane;

[0018] (3) Take the above pretreated polyurethane, add it to the above composite solution, stir evenly, add diethylenetriamine, send it into a reactor, introduce nitrogen, adjust the temperature of the reactor to 130-150° C., stir and react for 3-4 hours, add chlorinated paraffin, stir evenly, cool the material, and remove the solvent by rotary evaporation to obtain the product.

[0019] The advantages of the present invention are as follows: the present invention fills the gaps in the cable core with modified polyurethane elastic filling strips, which have good anti-twisting, anti-tensile and anti-extrusion effects; the core conductors are coated with ethylene propylene rubber insulation layers, which have good low-density high filling properties, aging resistance, corrosion resistance, water vapor resistance, superheated water resistance, and high elasticity, and can well protect each core conductor; the Kevlar fiber braided layer has strong tensile resistance; the present invention is provided with a signal core, an optical fiber core and a ground core, and provides the intelligent effect and safety performance of the cable; the present invention uses carboxyl-terminated nitrile rubber as a toughening agent, wherein the carboxyl group reacts with the phenolic hydroxyl group of the boron phenolic resin to generate a new ester bond, which effectively improves the toughness and shear strength of the composite material; the modified polyurethane material is used as the central material of the cable, and because it has good toughness and resilience, it can have a better compression resistance effect, and ensure the stability and strength of the overall structure of the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the present invention.

[0021] Figure markings: main line core 1, main conductor 1-1, EPDM rubber insulation layer one 1-2, tinned copper wire braided shielding layer one 1-3, optical fiber core 2, PBT layer 2-1, signal line core 3, signal conductor 3-1, EPDM rubber insulation layer two 3-2, tinned copper wire braided sub-shielding layer 3-3, tinned copper wire braided general shielding layer 3-4, ground wire core 4, grounding conductor 4-1, EPDM rubber insulation layer three 4-2, tinned copper wire braided shielding layer two 4-3, polyurethane elastic filling strip 5, sheath 6, polyurethane elastomer inner sheath 7, Kevlar fiber braided reinforcement layer 8, polyurethane elastomer outer sheath 9. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0023] Embodiment 1:

[0024] A low-voltage, corrosion-resistant, bending-resistant and tensile-resistant intelligent shore power cable comprises a main line core 1, an optical fiber core 2, a signal line core 3 and a ground line core 4. The three main line cores 1, the optical fiber core 2, the signal line core 3 and the ground line core 4 are twisted into a cable core, a polyurethane elastic filling strip 5 is filled in the internal gap of the cable core, a wrapping layer 6 is wrapped around the outside of the cable core, a polyurethane elastic inner protective layer 7 is extruded outside the wrapping layer 6, a Kevlar fiber braided reinforcement layer 8 is woven, and finally a polyurethane elastic outer sheath 9 is extruded.

[0025] The main line core 1 includes a main conductor 1-1, an EPDM rubber insulation layer 1-2 is coated on the outside of the main conductor 1-1, and a plurality of main conductors 1-1 are bundled and then coated on the outside with a tinned copper wire braided shielding layer 1-3.

[0026] The optical fiber core 2 is coated with a PBT layer 2 - 1 .

[0027] The signal core 3 includes a signal conductor 3-1, an EPDM rubber insulation layer 3-2 is coated on the outside of the signal conductor 3-1, two signal conductors 3-1 are twisted together and coated with a tinned copper wire braided shielding layer 3-3 to form a twisted signal core, and two twisted signal cores are twisted together and coated with a tinned copper wire braided shielding layer 3-4 to form a signal core.

[0028] The ground wire core 4 includes a grounding conductor 4-1, an EPDM rubber insulation layer 4-2 is coated on the outside of the grounding conductor 4-1, and a plurality of grounding conductors 4-1 are bundled and then coated on the outside with a tinned copper wire braided shielding layer 4-3.

[0029] The polyurethane elastic filling strip 5, the polyurethane elastic inner protective layer 7 and the polyurethane elastic outer protective sheath 9 are all made of modified polyurethane material.

[0030] The modified polyurethane material is composed of the following raw materials in parts by weight:

[0031] Polyurethane 80, triglycidyl isocyanurate 4, chlorinated paraffin 3, carboxyl-terminated nitrile rubber 14, boron phenolic resin 9, ethyl acetate 30, diethylenetriamine 3.

[0032] The preparation method of the modified polyurethane material comprises the following steps:

[0033] (1) taking a boron phenolic resin, adding it to ethyl acetate, stirring evenly, adding a carboxyl-terminated nitrile rubber, raising the temperature to 90° C., keeping the temperature and stirring for 1 hour, cooling the material, and obtaining a composite solution;

[0034] (2) taking triglycidyl isocyanurate and polyurethane and mixing them, keeping them warm and stirring them at 70° C. for 1 hour to obtain pretreated polyurethane;

[0035] (3) Take the above pretreated polyurethane, add it to the above composite solution, stir evenly, add diethylenetriamine, send it into a reactor, introduce nitrogen, adjust the temperature of the reactor to 150° C., stir and react for 4 hours, add chlorinated paraffin, stir evenly, cool the material, and remove the solvent by rotary evaporation to obtain the product.

[0036] Embodiment 2:

[0037] A low-voltage, corrosion-resistant, bending-resistant and tensile-resistant intelligent shore power cable comprises a main line core 1, an optical fiber core 2, a signal line core 3 and a ground line core 4. The three main line cores 1, the optical fiber core 2, the signal line core 3 and the ground line core 4 are twisted into a cable core, a polyurethane elastic filling strip 5 is filled in the internal gap of the cable core, a wrapping layer 6 is wrapped around the outside of the cable core, a polyurethane elastic inner protective layer 7 is extruded outside the wrapping layer 6, a Kevlar fiber braided reinforcement layer 8 is woven, and finally a polyurethane elastic outer sheath 9 is extruded.

[0038] The main line core 1 includes a main conductor 1-1, an EPDM rubber insulation layer 1-2 is coated on the outside of the main conductor 1-1, and a plurality of main conductors 1-1 are bundled and then coated on the outside with a tinned copper wire braided shielding layer 1-3.

[0039] The optical fiber core 2 is coated with a PBT layer 2 - 1 .

[0040] The signal core 3 includes a signal conductor 3-1, an EPDM rubber insulation layer 3-2 is coated on the outside of the signal conductor 3-1, two signal conductors 3-1 are twisted together and coated with a tinned copper wire braided shielding layer 3-3 to form a twisted signal core, and two twisted signal cores are twisted together and coated with a tinned copper wire braided shielding layer 3-4 to form a signal core.

[0041] The ground wire core 4 includes a grounding conductor 4-1, an EPDM rubber insulation layer 4-2 is coated on the outside of the grounding conductor 4-1, and a plurality of grounding conductors 4-1 are bundled and then coated on the outside with a tinned copper wire braided shielding layer 4-3.

[0042] The polyurethane elastic filling strip 5, the polyurethane elastic inner protective layer 7 and the polyurethane elastic outer protective sheath 9 are all made of modified polyurethane material.

[0043] The modified polyurethane material is composed of the following raw materials in parts by weight:

[0044] Polyurethane 90, triglycidyl isocyanurate 5, chlorinated paraffin 4, carboxyl-terminated nitrile rubber 12, boron phenolic resin 8, ethyl acetate 35, diethylenetriamine 2.

[0045] The preparation method of the modified polyurethane material comprises the following steps:

[0046] (1) taking a boron phenolic resin, adding it to ethyl acetate, stirring evenly, adding a carboxyl-terminated nitrile rubber, raising the temperature to 93° C., keeping the temperature and stirring for 2 hours, cooling the material, and obtaining a composite solution;

[0047] (2) taking triglycidyl isocyanurate and polyurethane and mixing them, keeping them warm and stirring them at 75° C. for 1 hour to obtain pretreated polyurethane;

[0048] (3) Take the above pretreated polyurethane, add it to the above composite solution, stir evenly, add diethylenetriamine, send it into a reactor, introduce nitrogen, adjust the temperature of the reactor to 140° C., stir and react for 3.5 hours, add chlorinated paraffin, stir evenly, cool the material, and remove the solvent by rotary evaporation to obtain the product.

[0049] Polyurethane materials are all modified polyurethane materials with a thermoplastic linear structure. They have better stability, chemical resistance, resilience and mechanical properties than PVC foam materials, and have smaller compression deformation; they have good heat insulation, sound insulation, shock resistance and anti-toxic properties; they have the advantages of light weight, excellent sound insulation and heat insulation properties, chemical resistance, good electrical properties, easy processing, low water absorption, oil resistance, wear resistance, low temperature resistance, aging resistance, high hardness and good elasticity.

[0050] The internal gaps of the cable are filled with polyurethane elastic filling strips to ensure the roundness and stability of the internal structure of the cable.

[0051] The EPDM insulation layer has excellent weather resistance, ozone resistance, heat resistance, acid and alkali resistance, water vapor resistance, color stability, electrical properties, oil filling and fluidity at room temperature. EPDM products can be used for a long time at 120°C and can be used briefly or intermittently at 150-200°C. Under the conditions of ozone concentration of 50pphm and stretching of 30%, EPDM can last for more than 150 hours without cracking. Because EPDM lacks polarity and has low unsaturation, it has good resistance to various polar chemicals such as alcohol, acid, alkali, oxidant, refrigerant, detergent, animal and vegetable oil, ketone and fat; EPDM has excellent water vapor resistance and better heat resistance. EPDM also has good resistance to superheated water, and also has excellent electrical insulation and corona resistance. Because there is no polar substituent in the molecular structure of EPDM, the molecular cohesive energy is low, and the molecular chain can maintain flexibility and high elasticity in a wide range.

[0052] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A low-voltage, corrosion-resistant, bending-resistant, and tensile-resistant intelligent shore power cable, characterized in that: It includes a main line core, an optical fiber core, a signal line core and a ground line core, which are twisted into a cable core, a polyurethane elastic filling strip is filled in the gap inside the cable core, a wrapping layer is wrapped around the cable core, a polyurethane elastic inner sheath is extruded outside the wrapping layer, a Kevlar fiber braided reinforcement layer is woven, and finally an outer sheath is extruded; The outer sheath is a polyurethane elastic outer sheath; The polyurethane elastic filling strip, the polyurethane elastic inner protective layer and the polyurethane elastic outer protective sheath are all made of modified polyurethane material; The modified polyurethane material is composed of the following raw materials in parts by weight: Polyurethane 80-100, triglycidyl isocyanurate 4-7, chlorinated paraffin 3-5, carboxyl-terminated nitrile rubber 10-14, boron phenolic resin 6-9, ethyl acetate 30-40, diethylenetriamine 2-3; The preparation method of the modified polyurethane material comprises the following steps: (1) taking a boron phenolic resin, adding it to ethyl acetate, stirring evenly, adding a carboxyl-terminated nitrile rubber, raising the temperature to 90-95° C., keeping the temperature and stirring for 1-2 hours, cooling the material, and obtaining a composite solution; (2) Mixing triglycidyl isocyanurate and polyurethane, and stirring at 70-75° C. for 1-2 hours to obtain pretreated polyurethane; (3) Take the above pretreated polyurethane, add it to the above composite solution, stir evenly, add diethylenetriamine, send it into a reactor, introduce nitrogen, adjust the temperature of the reactor to 130-150° C., stir and react for 3-4 hours, add chlorinated paraffin, stir evenly, cool the material, and remove the solvent by rotary evaporation to obtain the product.

2. A low-voltage, corrosion-resistant, bending-resistant, and tensile-resistant intelligent shore power cable according to claim 1, characterized in that: The main line core comprises a main conductor, an ethylene propylene rubber insulating layer is coated on the outside of the main conductor, and a plurality of main conductors are bundled and twisted and then coated on the outside with a tinned copper wire braided shielding layer.

3. The low-voltage, corrosion-resistant, bending-resistant, and tensile-resistant intelligent shore power cable according to claim 1 is characterized in that: The optical fiber core is coated with a PBT layer.

4. The low-voltage, corrosion-resistant, bending-resistant, and tensile-resistant intelligent shore power cable according to claim 1 is characterized in that: The signal wire core includes a signal conductor, which is coated with an EPDM rubber insulation layer. After the two signal conductors are twisted, they are coated with a tinned copper wire braided sub-shielding layer on the outside to form a twisted signal wire core. After the two twisted signal wire cores are twisted, they are coated with a tinned copper wire braided general shielding layer on the outside to form a signal wire core.

5. The low-voltage, corrosion-resistant, bending-resistant, and tensile-resistant intelligent shore power cable according to claim 1 is characterized in that: The ground wire core comprises a grounding conductor, an EPDM rubber insulating layer three is coated on the outside of the grounding conductor, and a plurality of grounding conductors are bundled and twisted and then coated on the outside with a tinned copper wire braided shielding layer two.

6. The low-voltage, corrosion-resistant, bending-resistant, and tensile-resistant intelligent shore power cable according to claim 1, characterized in that: There are three main line cores.

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