CN113096874A - Watertight buoyancy type silicon rubber power cable with light armor - Google Patents
Watertight buoyancy type silicon rubber power cable with light armor Download PDFInfo
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- CN113096874A CN113096874A CN202110253337.3A CN202110253337A CN113096874A CN 113096874 A CN113096874 A CN 113096874A CN 202110253337 A CN202110253337 A CN 202110253337A CN 113096874 A CN113096874 A CN 113096874A
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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
- H01B7/12—Floating cables
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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
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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
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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
- H01B13/221—Sheathing; Armouring; Screening; Applying other protective layers filling-up interstices
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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
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/02—Disposition of insulation
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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
- H01B7/04—Flexible cables, conductors, or cords, e.g. trailing cables
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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
- H01B7/04—Flexible cables, conductors, or cords, e.g. trailing cables
- H01B7/045—Flexible cables, conductors, or cords, e.g. trailing cables attached to marine objects, e.g. buoys, diving equipment, aquatic probes, marine towline
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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
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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
- H01B7/29—Protection against damage caused by extremes of temperature or by flame
- H01B7/295—Protection against damage caused by extremes of temperature or by flame using material resistant to flame
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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
- H01B7/40—Insulated conductors or cables characterised by their form with arrangements for facilitating mounting or securing
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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
- H01B7/42—Insulated conductors or cables characterised by their form with arrangements for heat dissipation or conduction
- H01B7/428—Heat conduction
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B9/00—Power cables
- H01B9/02—Power cables with screens or conductive layers, e.g. for avoiding large potential gradients
- H01B9/021—Features relating to screening tape per se
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- 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 watertight buoyancy type silicon rubber power cable with light armor, which comprises a cable core, a cross-linked polyethylene insulating skin, an insulating shielding layer, a copper strip shielding layer, an inner water-blocking tape layer, a silicon rubber inner sheath, an inner armor layer, an outer water-blocking tape layer, a foam outer sheath and an outer armor sleeve; the inner armor layer consists of silicon rubber fins, inorganic powder, a buoyancy control pipe and polyurethane flame retardant paste; the inner wall of the aerogel sleeve is adhered outside the inner water-blocking tape layer through waterproof glue; the invention also provides a corresponding preparation method. According to the invention, a novel process of softening and shaping firstly and then vulcanizing and shaping is adopted to obtain the light armor structure with a special structure, and the light armor structure has multiple functions of flame retardance, heat conduction, water tightness enhancement and the like; the buoyancy-controllable novel design is realized through the buoyancy control pipe and the foam outer sheath, the multi-layer waterproof protection is provided, the high water tightness is realized, the flexibility is high, the underwater and overwater laying and using are facilitated, the ocean power generation and other resource utilization are facilitated, and the popularization is worthy.
Description
Technical Field
The invention relates to the technical field of buoyancy cables, in particular to a watertight buoyancy type silicon rubber power cable with light armor.
Background
The buoyancy cable is a novel high-tech content cable, and along with the improvement of ocean resource utilization rate by a wide margin, the buoyancy cable has caused extensive research enthusiasm in recent years, also provides help for surface of water floating cable laying, underwater detection cable.
However, the existing buoyancy cable is often completely determined after being processed and shipped, so that the existing buoyancy cable can only adapt to underwater or water detection within a certain depth range, the existing buoyancy cable is generally required to be specially customized due to the non-adjustability of the buoyancy, and the water tightness, the internal flame resistance of an underwater cabin and the low-temperature resistance under deep water of various existing buoyancy cables cannot be sufficiently guaranteed, so that the structure of the existing buoyancy cable needs to be effectively improved.
Disclosure of Invention
The invention aims to solve the defects in the prior art, and provides a watertight buoyancy type silicon rubber power cable with light armor.
In order to achieve the purpose, the invention adopts the following technical scheme:
a watertight buoyancy type silicon rubber power cable with light armor comprises a cable core, a cross-linked polyethylene insulating skin wrapped outside the cable core, an insulating shielding layer wrapped outside the cross-linked polyethylene insulating skin, a copper strip shielding layer wrapped outside the insulating shielding layer, an inner water-blocking tape layer wrapped outside the copper strip shielding layer, a silicon rubber inner sheath extruded outside the inner water-blocking tape layer, an inner armor layer arranged outside the silicon rubber inner sheath, an outer water-blocking tape layer wrapped outside the inner armor layer, a foam outer sheath sleeved outside the outer water-blocking tape layer and an outer armor sleeve sleeved outside the foam outer sheath;
the cable core is a conductor formed by stranding a plurality of silver-plated soft copper wires, a cross-linked polyethylene insulating skin is extruded outside the cable core, the insulating shielding layer is formed by wrapping a polyvinyl chloride film tape sprayed with silver conductive paint, the copper strip shielding layer is a double-layer shielding tape structure formed by reversely wrapping a double-layer copper strip, and the inner water blocking tape layer is formed by wrapping aramid fiber water-blocking cloth;
the inner armor layer comprises silicon rubber fins fixedly connected with the outer surface of the silicon rubber inner sheath, inorganic powder is adhered to the outer surfaces of the silicon rubber fins, a buoyancy control pipe is arranged in a cavity formed between every two adjacent silicon rubber fins, and polyurethane flame retardant paste is filled in a gap between the cavity formed between every two adjacent silicon rubber fins and the buoyancy control pipe;
the outer water-blocking tape layer is formed by wrapping aramid water-blocking cloth, the foam outer sheath is adhered to the outer water-blocking tape layer through waterproof glue, and the outer armored sleeve is adhered to the outer foam outer sheath through the waterproof glue.
Preferably, the silicon rubber inner sheath and the silicon rubber fin are integrally formed, the softening temperature is 120-130 ℃, and the silicon rubber fin is conveniently softened during processing, so that the inorganic powder is conveniently adhered and the buoyancy control tube is wrapped.
Preferably, the material of the silicone rubber inner sheath and the silicone rubber fin is added with a dicumyl peroxide curing agent, and the curing temperature is 170-160 ℃ for vulcanization molding.
Preferably, the foam outer sheath is a non-porous polyurethane foam material, the outer armor sleeve is a hose made of a thermoplastic elastomer material, and protective paint is coated on the outer wall of the outer armor sleeve.
Preferably, the multi-section foam outer sheath is tightly sleeved outside the outer waterproof belt, and waterproof glue is coated in a gap between adjacent foam outer sheaths; the multi-section outer armored sleeve is tightly sleeved outside the foam outer sheath, and a waterproof glue is coated in a gap between adjacent outer armored sleeves; and the gap between the adjacent foam outer sheaths is positioned in the middle position in the outer armor sleeve and is distributed in a crossed manner, so that the water tightness is further improved.
Preferably, one end of each group of buoyancy control pipes is communicated with a liquid supply device or a gas supply device and a liquid nitrogen pressurizing pump for shunting and guiding, and the other end of each group of buoyancy control pipes is communicated with a collecting device. The weight of the buoyancy control pipe is controlled by introducing gas and liquid with different specific gravities, so that the cable floats on the water surface and under the water, and the buoyancy control is realized.
Preferably, the inorganic powder is formed by mixing carbon black powder, kaolin powder and organic phosphorus flame retardant powder in equal amount, contains a flame retardant component, is easy to soften and gradually carbonize with silicon rubber when meeting the conditions of combustion in an underwater cabin and extremely high temperature, and finally forms an inorganic crusted layer to play a role in flame retardance and heat insulation.
In order to realize the watertight buoyancy type silicon rubber power cable with the light armor, the invention also provides a corresponding preparation method, which comprises the following steps:
s1, preparing cable cores and arranging shielding layers thereof: the cable core, the cross-linked polyethylene insulating skin, the insulating shielding layer, the copper strip shielding layer and the inner water-blocking tape layer are sequentially arranged according to the structure;
s2, primary preparation of sawtooth-shaped silicon rubber: preparing sawtooth-shaped silicon rubber with a silicon rubber inner sheath and silicon rubber fins outside the inner water blocking tape layer by adopting a special extrusion die at the temperature of 125 +/-5 ℃, wherein a cavity between adjacent silicon rubber fins is of an open structure;
s3, forming an inner armor layer: keeping 140 ℃ hot air at the opening of the extrusion die for heat preservation, scattering inorganic powder by a vibrating screen until the inorganic powder is adhered to the outer surfaces of the silicon rubber inner sheath and the silicon rubber fin, and blowing off redundant non-adhered powder by the hot air;
clamping the buoyancy control pipe in a cavity between adjacent silicon rubber fins, slightly extruding to enable the buoyancy control pipe to be partially embedded in the surface of the silicon rubber inner sheath, and filling polyurethane flame retardant paste in a gap between the silicon rubber fins and the buoyancy control pipe;
continuously passing the serrated silicon rubber into a conical heating sleeve and a cylindrical heating sleeve, wherein heating sheets are arranged on the inner surfaces of the conical heating sleeve and the cylindrical heating sleeve, the heating temperature in the conical heating sleeve is 135 +/-5 ℃, the heating temperature in the cylindrical heating sleeve is 155 +/-5 ℃, the inner diameter of one end of the conical heating sleeve is the same as that of a special extrusion die, the inner diameter of the other end of the conical heating sleeve is the same as that of the cylindrical heating sleeve, and the inner diameter of the cylindrical heating sleeve is smaller than that of the special extrusion die;
the outer surfaces of the conical heating sleeve and the cylindrical heating sleeve are respectively fixedly connected with a gear ring, the gear ring is engaged with a driving gear, the center of the driving gear is fixedly sleeved with a motor spindle and used for enabling the conical heating sleeve and the cylindrical heating sleeve to rotate, the silicon rubber fins are gradually softened through rotation, the inner surface part of one silicon rubber fin is lapped on the outer surface part of an adjacent silicon rubber fin, the buoyancy control tube is wrapped, heat preservation and vulcanization are carried out on the silicon rubber fins for 30-70min through the cylindrical heating sleeve, finally, the silicon rubber is molded, and the temperature is reduced to 50-60 ℃ to form an inner armor layer;
s4, preparation of a finished product power cable: wrapping an outer water-blocking tape layer outside the inner armor layer, coating waterproof glue outside the outer water-blocking tape layer, gradually rotating and pushing the multi-section foam outer sheath to be sleeved outside the inner armor layer, and keeping the temperature at 50-60 ℃ for 30 min; naturally airing to room temperature, coating waterproof glue outside the foam outer sheath, gradually rotating and pushing the multi-section outer sheath to be sleeved outside the multi-section foam outer sheath, enabling the gap between adjacent foam outer sheaths to be located in the middle position in the outer sheath and distributed in a crossed manner, further improving the water tightness, keeping the temperature at 50-60 ℃ for 10min, and naturally airing to room temperature to obtain the finished product power cable.
Compared with the prior art, the invention has the beneficial effects that:
the invention relates to a novel process for softening, shaping and vulcanizing to shape, which comprises the steps of preparing sawtooth-shaped silicon rubber by a special extrusion die, sequentially adhering inorganic powder after silicon rubber fins are softened, clamping the inorganic powder into a buoyancy control tube and filling the buoyancy control tube, deforming the silicon rubber fins by a special conical heating sleeve and wrapping the buoyancy control tube, and vulcanizing and shaping by a special cylindrical heating sleeve to obtain a light armor structure with a special structure.
The invention realizes zero buoyancy design through the foam outer sheath, protects the outer armored sleeve, and the two are in cross sleeve joint section by section to improve water tightness, finally forms multilayer waterproof protection of an inner water blocking tape layer, a silicon rubber inner sheath, an inner armor layer, an outer water blocking tape layer, waterproof glue, a foam outer sheath, waterproof glue, an outer armored sleeve and protective paint, realizes high water tightness, has greater flexibility and is convenient to lay, use on water and use under water;
the cable core adopts a shielding structure of the crosslinked polyethylene insulating skin, the insulating shielding layer, the copper strip shielding layer and the silicon rubber inner sheath, is beneficial to underwater ultrahigh-voltage power transmission, has high toughness and softness, is also provided with a light armor structure with flame retardance, heat conduction and buoyancy control, is beneficial to utilization of ocean power generation and other resources, and is worthy of popularization.
Drawings
FIG. 1 is a schematic diagram of the internal structure of a watertight buoyancy type silicone rubber power cable with a light armor according to the present invention;
FIG. 2 is a partial enlarged view I of the internal structure of a watertight buoyancy type silicone rubber power cable with light armor according to the present invention;
FIG. 3 is a schematic flow chart of a method for manufacturing a watertight buoyancy type silicone rubber power cable with a light armor according to the present invention;
in the figure: the cable comprises a cable core 1, a cross-linked polyethylene insulating skin 2, an insulating shielding layer 3, a copper strip shielding layer 4, an inner water-blocking tape layer 5, a silicon rubber inner sheath 6, an inner armor layer 7, a silicon rubber fin 701, inorganic powder 702, a buoyancy control tube 703, polyurethane flame retardant paste 704, an outer water-blocking tape layer 8, a foam outer sheath 9 and an outer armor sleeve 10.
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.
Referring to fig. 1-2, a watertight buoyancy type silicone rubber power cable with light armor comprises a cable core 1, a cross-linked polyethylene insulating skin 2 wrapped outside the cable core 1, an insulating shielding layer 3 wrapped outside the cross-linked polyethylene insulating skin 2, a copper strip shielding layer 4 wrapped outside the insulating shielding layer 3, an inner water blocking tape layer 5 wrapped outside the copper strip shielding layer 4, a silicone rubber inner sheath 6 extruded outside the inner water blocking tape layer 5, an inner armor layer 7 arranged outside the silicone rubber inner sheath 6, an outer water blocking tape layer 8 wrapped outside the inner armor layer 7, a foam outer sheath 9 sleeved outside the outer water blocking tape layer 8 and an outer armor sleeve 10 sleeved outside the foam outer sheath 9; the cable comprises a cable core 1, an insulation shielding layer 3, a copper strip shielding layer 4 and an inner water-blocking belt layer 5, wherein the cable core 1 is a conductor formed by stranding a plurality of silver-plated soft copper wires, a cross-linked polyethylene insulation skin 2 is extruded outside the cable core 1, the insulation shielding layer is formed by wrapping a polyvinyl chloride film tape sprayed with silver conductive paint, the copper strip shielding layer is a double-layer shielding belt structure formed by reversely wrapping double-layer copper strips, and the inner water-blocking belt layer 5 is formed by wrapping aramid water-blocking cloth; the inner armor layer 7 comprises silicon rubber fins 701 fixedly connected with the outer surface of the silicon rubber inner sheath 6, inorganic powder 702 is adhered to the outer surface of each silicon rubber fin 701, a buoyancy control pipe 703 is arranged in a cavity formed between every two adjacent silicon rubber fins 701, and polyurethane flame retardant paste 704 is filled in a gap between the cavity formed between every two adjacent silicon rubber fins 701 and the buoyancy control pipe 703; the outer water-blocking tape layer 8 is formed by wrapping aramid water-blocking cloth, the foam outer sheath 9 is adhered to the outer layer of the outer water-blocking tape layer 8 through waterproof glue, and the outer armored sleeve 10 is adhered to the outer layer of the foam outer sheath 9 through the waterproof glue.
Referring to fig. 1-2, the silicone rubber inner sheath 6 and the silicone rubber fins 701 are integrally formed, and the softening temperature is 120-.
Referring to fig. 1-2, dicumyl peroxide curing agent is added to the material of the silicone rubber inner sheath 6 and the silicone rubber fin 701, and the curing temperature is 170-.
Referring to fig. 1-2, the outer foam sheath 9 is specifically a non-porous polyurethane foam material, the outer sheath 10 is specifically a hose made of a thermoplastic elastomer material, and the outer wall of the outer sheath 10 is coated with a protective paint.
Referring to fig. 1-2, a plurality of sections of foam outer sheaths 9 are tightly sleeved outside an outer water-blocking tape layer 8, and waterproof glue is coated in gaps between adjacent foam outer sheaths 9; the multi-section outer armored sleeve 10 is tightly sleeved outside the foam outer sheath 9, and waterproof glue is coated in a gap between adjacent outer armored sleeves 10; and the gap between the adjacent foam outer sheaths 9 is positioned in the middle of the inner part of the outer armored sleeve 10 and is distributed in a crossed manner, so that the water tightness is further improved.
Referring to fig. 1-2, one end of the multiple groups of buoyancy control tubes 703 is divided and guided in by a liquid nitrogen pressurizing pump communicated with a liquid supply device or a gas supply device, and the other end is communicated with a collection device. The weight of the buoyancy control pipe 703 is controlled by introducing gas and liquid of different specific gravities, so that the cable floats on the water surface and under the water, that is, the buoyancy control is realized.
Referring to fig. 1-2, the inorganic powder 702 is formed by mixing equal amounts of carbon black powder, kaolin powder and organic phosphorus flame retardant powder, contains flame retardant components, is easy to soften and gradually carbonize with silicon rubber when meeting the conditions of combustion in an underwater cabin and extremely high temperature, and finally forms an inorganic crust layer to play a role in flame retardance and heat insulation.
In order to realize the watertight buoyancy type silicon rubber power cable with the light armor in the structure, the invention also provides a corresponding preparation method, and the preparation method is shown in figure 3 and comprises the following steps:
s1, preparation of the cable core 1 and arrangement of the shielding layer: the cable core 1, the crosslinked polyethylene insulating skin 2, the insulating shielding layer 3, the copper strip shielding layer 4 and the inner water blocking tape layer 5 are sequentially arranged according to the structure;
s2, primary preparation of sawtooth-shaped silicon rubber: preparing sawtooth-shaped silicon rubber with a silicon rubber inner sheath 6 and silicon rubber fins 701 outside the inner water blocking tape layer 5 at 125 +/-5 ℃ by adopting a special extrusion die, wherein cavities between adjacent silicon rubber fins 701 are of an open structure;
s3, formation of inner sheath 7: keeping 140 ℃ hot air at the opening of the extrusion die for heat preservation, scattering inorganic powder 702 by a vibrating screen until the inorganic powder 702 is adhered to the outer surfaces of the silicone rubber inner sheath 6 and the silicone rubber fin 701, and blowing off redundant non-adhered powder by the hot air;
then clamping the buoyancy control tube 703 in a cavity between adjacent silicon rubber fins 701, slightly extruding to enable the buoyancy control tube 703 to be partially embedded in the surface of the silicon rubber inner sheath 6, and filling polyurethane flame retardant paste 704 in a gap between the silicon rubber fins 701 and the buoyancy control tube 703;
continuously passing the serrated silicon rubber into a conical heating sleeve and a cylindrical heating sleeve, wherein heating sheets are arranged on the inner surfaces of the conical heating sleeve and the cylindrical heating sleeve, the heating temperature in the conical heating sleeve is 135 +/-5 ℃, the heating temperature in the cylindrical heating sleeve is 155 +/-5 ℃, the inner diameter of one end of the conical heating sleeve is the same as that of a special extrusion die, the inner diameter of the other end of the conical heating sleeve is the same as that of the cylindrical heating sleeve, and the inner diameter of the cylindrical heating sleeve is smaller than that of the special extrusion die;
gear rings are fixedly connected to the outer surfaces of the conical heating sleeve and the cylindrical heating sleeve respectively, the gear rings are meshed with driving gears, a motor spindle is fixedly sleeved in the center of each driving gear and used for enabling the conical heating sleeve and the cylindrical heating sleeve to rotate, the silicon rubber fins 701 are softened gradually through rotation, the inner surface part of one silicon rubber fin 701 is lapped on the outer surface part of the adjacent silicon rubber fin 701, the buoyancy control tube 703 is wrapped, heat preservation and vulcanization are carried out on the silicon rubber fins for 30-70min through the cylindrical heating sleeve, finally, the silicon rubber is molded, and the temperature is reduced to 50-60 ℃ to form an inner armor layer 7;
s4, preparation of a finished product power cable: wrapping an outer water-blocking tape layer 8 outside an inner armor layer 7, coating waterproof glue outside the outer water-blocking tape layer 8, gradually rotating and pushing a multi-section foam outer sheath 9 to be sleeved outside the inner armor layer 7, and keeping the temperature at 50-60 ℃ for 30 min; naturally airing to room temperature, coating waterproof glue outside the foam outer sheath 9, gradually rotating and pushing the multi-section outer armored sleeve 10 to be sleeved outside the multi-section foam outer sheath 9, enabling a gap between adjacent foam outer sheaths 9 to be located in the middle position of the outer armored sleeve 10 and distributed in a crossed mode, further improving the water tightness, keeping the temperature at 50-60 ℃ for 10min, and naturally airing to room temperature to obtain the finished product power cable.
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 (8)
1. The watertight buoyancy type silicon rubber power cable with the light armor is characterized by comprising a cable core (1), a cross-linked polyethylene insulating skin (2) wrapped outside the cable core (1), an insulating shielding layer (3) wrapped outside the cross-linked polyethylene insulating skin (2), a copper strip shielding layer (4) wrapped outside the insulating shielding layer (3), an inner water-blocking tape layer (5) wrapped outside the copper strip shielding layer (4), a silicon rubber inner sheath (6) extruded outside the inner water-blocking tape layer (5), an inner armor layer (7) arranged outside the silicon rubber inner sheath (6), an outer water-blocking tape layer (8) wrapped outside the inner armor layer (7), a foam outer sheath (9) sleeved outside the outer water-blocking tape layer (8) and an outer armor sleeve (10) sleeved outside the foam outer sheath (9);
the cable comprises a cable core (1), an insulation shielding layer (3), an inner water-blocking tape layer (5) and a cross-linked polyethylene insulation layer (2), wherein the cable core (1) is a conductor formed by stranding a plurality of silver-plated soft copper wires, the cross-linked polyethylene insulation layer (2) is extruded outside the cable core (1), the insulation shielding layer (3) is formed by wrapping a polyvinyl chloride film tape coated with silver conductive paint, the copper tape shielding layer (4) is a double-layer shielding tape structure formed by reversely wrapping double-layer copper tapes, and the inner water-blocking tape layer (5) is formed by wrapping aramid water-blocking cloth;
the inner armor layer (7) comprises silicon rubber fins (701) fixedly connected with the outer surface of the silicon rubber inner sheath (6), inorganic powder (702) is adhered to the outer surface of each silicon rubber fin (701), a buoyancy control pipe (703) is arranged in a cavity formed between every two adjacent silicon rubber fins (701), and polyurethane flame retardant paste (704) is filled in a gap between the cavity formed between every two adjacent silicon rubber fins (701) and the buoyancy control pipe (703);
the outer water-blocking tape layer (8) is formed by wrapping aramid water-blocking cloth, the foam outer sheath (9) is adhered to the outer layer of the outer water-blocking tape layer (8) through waterproof glue, and the outer armored sleeve (10) is adhered to the outer layer of the foam outer sheath (9) through the waterproof glue.
2. The watertight buoyancy type silicone rubber power cable with the light armor according to claim 1, wherein the silicone rubber inner sheath (6) and the silicone rubber fin (701) are integrally formed, and the softening temperature is 120 ℃ and 130 ℃, so that the silicone rubber fin (701) is softened during processing, and the inorganic powder (702) is adhered to and wraps the buoyancy control tube (703).
3. The watertight buoyancy type silicone rubber power cable with the light armor according to claim 2, wherein a dicumyl peroxide curing agent is added to the material of the silicone rubber inner sheath (6) and the silicone rubber fins (701), and the curing temperature is 170-160 ℃ for vulcanization molding.
4. Watertight and buoyant silicone rubber power cable with light armour according to claim 1, characterised in that the outer foamed outer sheath (9) is in particular a non-porous polyurethane foam material, the outer armoured sleeve (10) is in particular a hose of thermoplastic elastomer material, the outer wall of the outer armoured sleeve (10) being coated with a protective paint.
5. The watertight buoyancy type silicone rubber power cable with light armor according to claim 1, characterized in that a plurality of sections of the outer foamed sheaths (9) are tightly sleeved outside the outer water blocking tape layer (8), and waterproof glue is coated on gaps between adjacent outer foamed sheaths (9); the outer armor sleeves (10) in multiple sections are tightly sleeved outside the foam outer sheath (9), and waterproof glue is coated on gaps between adjacent outer armor sleeves (10); and the gap between the adjacent foam outer sheaths (9) is positioned in the middle position in the outer armor sleeve (10) and is distributed in a crossed manner, so that the water tightness is further improved.
6. The watertight buoyancy type silicone rubber power cable with light armor according to claim 1, wherein one end of the buoyancy control tubes (703) is divided and led in by a liquid nitrogen pressurizing pump communicated with a liquid supply device or a gas supply device, and the other end is communicated with a collection device;
the weight of the buoyancy control pipe (703) is controlled by introducing gas and liquid with different specific gravities, so that the cable floats on the water surface and under the water, namely the buoyancy control is realized.
7. The watertight and buoyant silicone rubber power cable with light armor according to claim 1, wherein the inorganic powder (702) is a mixture of equal amounts of carbon black powder, kaolin powder, and an organophosphorus flame retardant powder.
8. The method for preparing the watertight buoyancy type silicone rubber power cable with the light armor according to claim 1, characterized by comprising the following steps:
s1, preparing a cable core (1) and arranging a shielding layer thereof: the cable core (1), the cross-linked polyethylene insulating skin (2), the insulating shielding layer (3), the copper strip shielding layer (4) and the inner water blocking tape layer (5) are sequentially arranged according to the structure;
s2, primary preparation of sawtooth-shaped silicon rubber: preparing sawtooth-shaped silicon rubber with a silicon rubber inner sheath (6) and silicon rubber fins (701) outside the inner water-blocking tape layer (5) at 125 +/-5 ℃ by adopting a special extrusion die, wherein cavities between adjacent silicon rubber fins (701) are of an open structure;
s3, formation of an inner armor layer (7): keeping 140 ℃ hot air at the opening of the extrusion die for heat preservation, scattering inorganic powder (702) by adopting a vibrating screen until the inorganic powder (702) is fully adhered to the outer surfaces of the silicon rubber inner sheath (6) and the silicon rubber fin (701), and blowing off redundant non-adhered powder by the hot air;
clamping the buoyancy control pipe (703) in a cavity between adjacent silicon rubber fins (701), slightly extruding to enable the buoyancy control pipe (703) to be partially embedded in the surface of the silicon rubber inner sheath (6), and filling polyurethane flame retardant paste (704) in a gap between the silicon rubber fins (701) and the buoyancy control pipe (703);
continuously passing the serrated silicon rubber into a conical heating sleeve and a cylindrical heating sleeve, wherein heating sheets are arranged on the inner surfaces of the conical heating sleeve and the cylindrical heating sleeve, the heating temperature in the conical heating sleeve is 135 +/-5 ℃, the heating temperature in the cylindrical heating sleeve is 155 +/-5 ℃, the inner diameter of one end of the conical heating sleeve is the same as that of a special extrusion die, the inner diameter of the other end of the conical heating sleeve is the same as that of the cylindrical heating sleeve, and the inner diameter of the cylindrical heating sleeve is smaller than that of the special extrusion die;
gear rings are fixedly connected to the outer surfaces of the conical heating sleeve and the cylindrical heating sleeve respectively, a driving gear is meshed with the gear rings, a motor spindle is fixedly sleeved in the center of the driving gear and used for enabling the conical heating sleeve and the cylindrical heating sleeve to rotate, the silicon rubber fins (701) are gradually softened through rotation, the inner surface part of one silicon rubber fin (701) is lapped on the outer surface part of the adjacent silicon rubber fin (701), the buoyancy control tube (703) is wrapped, heat preservation and vulcanization are carried out on the silicon rubber for 30-70min through the cylindrical heating sleeve, and finally the silicon rubber is shaped and cooled to 50-60 ℃ to form an inner armor layer (7);
s4, preparation of a finished product power cable: wrapping an outer water-blocking tape layer (8) outside the inner armor layer (7), coating waterproof glue outside the outer water-blocking tape layer (8), gradually rotating and pushing a plurality of sections of foam outer sheaths (9) to be sleeved outside the inner armor layer (7), and preserving heat at 50-60 ℃ for 30 min; naturally airing to room temperature, coating waterproof glue on the outer side of the foam outer sheath (9), gradually rotating and pushing the multi-section outer armored sleeve (10) to be sleeved outside the multi-section foam outer sheath (9), enabling a gap between adjacent foam outer sheaths (9) to be located in the middle position of the outer armored sleeve (10) and distributed in a crossed mode, further improving water tightness, keeping the temperature at 50-60 ℃ for 10min, and naturally airing to room temperature to obtain the finished product power cable.
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| CN113764125A (en) * | 2021-09-10 | 2021-12-07 | 中天科技装备电缆有限公司 | Shore power cable |
| CN115128748A (en) * | 2022-03-25 | 2022-09-30 | 远东通讯有限公司 | Anti-sonar submarine optical cable and preparation method thereof |
| WO2023040020A1 (en) * | 2021-09-14 | 2023-03-23 | 中天科技海缆股份有限公司 | Submarine cable |
| CN113764125B (en) * | 2021-09-10 | 2024-05-31 | 中天科技装备电缆有限公司 | Shore power cable |
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| CN115128748B (en) * | 2022-03-25 | 2024-03-08 | 远东通讯有限公司 | Sonar-resistant submarine optical cable and preparation method thereof |
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| CN113096874B (en) | 2022-12-20 |
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