CN212365550U - Longitudinal watertight composite cable for deep sea underwater vehicle - Google Patents

Abstract

The utility model relates to a deep sea is cable field for underwater navigation, concretely relates to deep sea is compound cable of vertical watertight for underwater navigation equipment, this cable include power control unit, network transmission unit, have set gradually the second in power control unit and network transmission unit's the outside and have blocked water around covering, inner sheath, armor, oversheath. The utility model discloses compound cable satisfies vertical watertight functional requirement, and vertical water pressure 6.75Mpa is resistant, has realized the synthesis of functions such as vertical watertight, network signal transmission, electric power control signal transmission, utilizes the compound design of structure to solve its electromagnetic compatibility problem each other.

Description

Longitudinal watertight composite cable for deep sea underwater vehicle

Technical Field

The utility model relates to a deep sea is cable field technical field for the underwater navigation, in particular to deep sea is compound cable of vertical watertight for underwater navigation equipment.

Background

The longitudinal watertight performance of the longitudinal watertight cable means that under extreme conditions, after the longitudinal end face of the underwater cable is damaged or broken, the longitudinal water pressure along the end face can only be transmitted within a certain distance, so that the water pressure cannot penetrate along the cable to endanger the safety of personnel or cause equipment damage; the composite cable with the longitudinal watertight function is a nerve and a blood vessel of underwater equipment and facilities, the longitudinal watertight cable is a substitute of the scientific and technological content in the field of special electric wires and cables due to the structural particularity, the longitudinal watertight composite cable for power supply control of deep sea underwater navigation equipment and high-speed network transmission can be called as a bright bead on the crown of the longitudinal watertight cable, but the research and development of the cable and the optical cable composite cable for deep sea underwater navigation always have difficulty, so that the requirements on longitudinal watertight are met, and the electromagnetic compatibility problem and other requirements are also met.

Disclosure of Invention

In order to solve the problem, the utility model provides a deep sea is compound cable of vertical watertight for underwater navigation equipment has been developed. The water-tight structure meets the requirement of longitudinal water-tight function, resists longitudinal water pressure of 6.75Mpa, realizes the integration of longitudinal water-tight function, network signal transmission, power control signal transmission and other functions, and solves the problem of mutual electromagnetic compatibility by utilizing the composite design of the structure.

The utility model discloses concrete scheme is as follows:

a longitudinal watertight composite cable for deep sea underwater vehicle comprises:

the power control unit comprises a plurality of composite insulating wire cores, each composite insulating wire core comprises an injection conductor, a composite insulating layer is arranged outside each injection conductor, a first water-blocking wrapping layer is arranged on the outer layer of each twisted composite insulating wire core, each composite insulating layer comprises a polyethylene inner insulating layer and a polyolefin outer insulating layer, and the thickness ratio of the polyethylene inner insulating layer to the polyolefin outer insulating layer is 1: 1-2; the glue used for the glue injection conductor is quick-drying chloroprene rubber glue; the quick-drying chloroprene rubber adhesive is a mixed type, comprises chloroprene rubber, tackifying resin, a quick-volatile solvent, an anti-aging agent, an accelerating agent, a crosslinking agent and the like, has high surface drying speed, can be dried in a preheating pipe at 300 ℃ for 2s, has good adhesion with a metal conductor after surface drying, has no corrosion to metal, and is more suitable for producing watertight conductors;

the network transmission unit comprises a plurality of network transmission wire cores, each network transmission wire core comprises a network transmission conductor, an insulating layer is arranged outside each network transmission conductor, and a shielding layer is arranged on the outer layer of each network transmission wire core after the network transmission wire cores are twisted;

the power control unit and the network transmission unit are twisted, and after the twisting, the water-blocking wrapping layer, the inner sheath, the armor and the outer sheath are sequentially arranged.

Preferably, the shielding layer of the network transmission unit comprises an aluminum foil wrapping layer and a woven shielding layer which are arranged from inside to outside, the wrapping covering rate of the aluminum foil wrapping layer is 40-50%, and the weaving density of the woven shielding layer is not lower than 88%. The aluminum foil is wrapped and shielded and is woven to form a composite shielding layer, and the shielding effect is greatly improved.

Preferably, the armor is a composite water-blocking armor, and the composite water-blocking armor comprises a woven armor and water-blocking wrapping tape layers arranged on two sides of the woven armor. The armor that so sets up has avoided traditional the rubberizing of weaving the armor both sides and has come to block water, from making the even unity of water blocking layer thickness of both sides, on the other hand makes things convenient for the dismouting more.

Preferably, the composite insulation wire cores contained in the power control unit are 4-19 groups, and the network transmission units are 2-10 groups. And selecting different quantities according to the requirements of different composite cables.

Preferably, the composite insulation wire cores contained in the power control unit are multiple groups, and the multiple groups of composite insulation wire cores are stranded into a cable while injecting glue to form single-component room temperature vulcanized silica gel, so that the power control unit is formed. The effect of injecting glue here makes the stranding structure that becomes more stable on the one hand, and on the other hand the injecting glue that fills in can also play the effect that blocks water. The room temperature vulcanized silica gel is in a white emulsion shape, is non-toxic and non-corrosive, mainly comprises silica gel, a filler, a cross-linking agent, an antioxidant and the like, is in contact with air in a natural environment, is subjected to cross-linking curing, is adhered to an insulating surface, is tightly adhered to an outer layer polyolefin material, and has the effect of sealing a gap.

Preferably, the network transmission units are multiple groups, and the multiple groups of network transmission units are dispersedly twisted around the power control unit, and the single-component room-temperature vulcanized silica gel is injected while the twisting is performed. The arrangement mode enables the power transmission performance and the network transmission performance of the composite cable to be better. The effect of injecting glue here makes the stranding structure that becomes more stable on the one hand, and on the other hand the injecting glue that fills in can also play the effect that blocks water.

Preferably, the composite insulated wire core, the inner sheath and the outer sheath are all subjected to irradiation crosslinking, and the thermal elongation value of the composite insulated wire core after irradiation is less than or equal to 30%.

Preferably, the cable also comprises a filling core, and the filling core is stranded with the composite insulating wire core; and/or twisted with a network transmission conductor with an insulating layer; and/or twisted with the power control unit and the network transmission unit. That is, the filling core is twisted with different units according to the needs of the composite cable, so as to achieve the specific shape or other purposes required by the composite cable.

The preparation process of the longitudinal watertight composite cable for the deep sea underwater vehicle comprises the following steps:

1) preparing a power control unit:

the glue injection conductor A is formed by stranding a plurality of strands of copper cores containing coatings and then filling quick-drying neoprene into a stranding die to fill gaps;

b, double-layer co-extrusion coating is carried out on a composite insulating layer consisting of a polyethylene inner insulating layer and a polyolefin outer insulating layer outside the glue injection conductor, the thickness ratio of the polyethylene inner insulating layer to the polyolefin outer insulating layer is 1: 1-2, the glue injection conductor and the composite insulating layer form a composite insulating wire core, the composite insulating wire core is subjected to irradiation crosslinking, and the thermal extension value of the composite insulating layer after irradiation is less than or equal to 30%; the irradiation enables the thermal extension performance and other performances of the composite insulated wire core to be better, and the performance of the final composite cable is enhanced.

C, stranding a plurality of composite insulating wire cores into a cable, injecting single-component room temperature vulcanized silica gel in front of a forming die during cabling, and wrapping a first water-blocking wrapping layer;

2) preparing a network transmission unit:

a, extruding an insulating layer on the outer layer of the network transmission conductor to form a network transmission wire core;

b, stranding a plurality of groups of network transmission wire cores obtained in the step a into a cable;

c, arranging a shielding layer outside the cable obtained in the step b;

3) the plurality of network transmission units and the plurality of power control units form a cable, during cabling, the single-component room temperature vulcanized silica gel is injected and twisted, then the water-blocking tape is wrapped to form a second water-blocking wrapping layer, and the wrapping and covering rate of the second water-blocking wrapping layer is 40% -50%.

4) Extruding the inner sheath on the outer layer of the cable obtained in the step 3), and irradiating and crosslinking the extruded inner sheath by using an electron accelerator; the irradiation makes the thermal extension of the inner sheath and other performances better, and enhances the performance of the final composite cable.

5) Arranging armor outside the inner sheath;

6) and an outer sheath is extruded outside the armor and is subjected to irradiation crosslinking through an electron accelerator. The irradiation enables the thermal extension and other performances of the outer sheath to be better, and the performances of the final composite cable are enhanced.

Preferably, the step of disposing the shielding layer in step 2) includes: and c, filling single-component room temperature vulcanized silica gel into the forming die, lapping a single-sided polyester aluminum foil to form an aluminum foil lapping layer, wherein the aluminum surface faces outwards, the lapping rate of the aluminum foil lapping is 40-50%, then weaving a layer of copper wire containing a plating layer to form a woven shielding layer, and the weaving density is more than or equal to 88%. The single-sided polyester aluminum foil is a process which is easier to realize in batch production.

Advantageous effects

(1) The utility model discloses composite cable has gathered network transmission function and light current control transmission function;

(2) the composite cable of the utility model meets the requirements of longitudinal watertight function, resists longitudinal water pressure of 6.75Mpa, is suitable for ocean environment application, provides power transmission and control signal transmission for submarines, underwater submergence vehicles, detectors, underwater facilities and the like, and has the function of digital network signal transmission;

(3) the comprehensive functions of longitudinal watertight, network signal transmission, power control signal transmission and the like are realized, and the electromagnetic compatibility problem among the longitudinal watertight, network signal transmission, power control signal transmission and the like is solved by utilizing the composite design of the structure.

(4) The double-layer co-extrusion composite insulation has the advantages that the polyethylene is waterproof and moistureproof on the inner layer and is more tightly wrapped with the water-blocking conductor, and the polyolefin is on the outer layer and is more tightly bonded with the water-blocking adhesive by utilizing the performance of the non-polar material, so that the aim of resisting high water pressure is fulfilled. The double-layer scheme improves the strength and safety of insulation.

(5) After glue injection, the aluminum foil and the tinned braided composite shield are adopted, so that the change of the comprehensive dielectric property of the network caused by glue injection is improved, and the network signal can still reach the network transmission property in a glue injection-free state; the double-layer composite shielding increases the mechanical performance of the network unit, so that the structure of the network unit is kept stable in deep sea, and the transmission performance is stable.

(6) Be different from the rubber coating mode that blocks water of traditional armor, the utility model discloses a compound form, and the armor is woven to the tin-plating inside and outside all around the package water blocking tape, the three-layer plays jointly and blocks water, armor, strengthens, the guard action, guarantees the water blocking nature of deep sea application, the crushing resistance in deep sea, and the armor is the rubber coating not, and processing is nimble controllable, more is fit for the industrialization implementation in batches, and inside and outside around the water blocking tape intensity of package is far greater than the rubber coating mode, play and good protective effect to the cable under the deep sea.

(7) When the cable is formed, room temperature vulcanized silica gel is added, is in a white emulsion state, is non-toxic and non-corrosive, mainly comprises silica gel, a filling agent, a cross-linking agent, an antioxidant and the like, and is in contact with air in a natural environment, then is subjected to cross-linking curing, is adhered to an insulating surface, is tightly adhered to an outer layer polyolefin material, and plays a role in sealing gaps.

To sum up, the utility model discloses a composite cable's power transmission performance and network transmission performance are better, are fit for deep sea underwater navigation and use.

Drawings

Fig. 1 schematic diagram of the composite cable structure of the present invention

Fig. 2 the structure of the composite insulation core of the utility model is schematically illustrated

Fig. 3 the structure of the power control unit of the present invention is schematically illustrated

Fig. 4 is a schematic diagram of the structure of the network transmission unit of the present invention

1-a power control unit; 1.1-glue injection conductor; 1.2-composite insulating layer; 1.3-a filler core; 1.4-a first water-blocking wrapping layer; 2-a network transmission unit; 2.1-a conductor; 2.2-insulating layer; 2.3-aluminum foil wrapping layer; 2.4-braiding a shielding layer; 3-a second water-blocking wrapping layer; 4-inner sheath; 5-armoring; 6-outer sheath; 7-composite insulated wire core; 8-network transmission core.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

Unless specifically stated otherwise, the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and in the case of not making a contrary explanation, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be interpreted as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

The present invention will be described in detail below with reference to the accompanying drawings so as to facilitate the understanding of the present invention by those skilled in the art.

The utility model discloses a deep sea underwater vehicle is with compound cable of vertical watertight, it includes that inside concentrates a plurality of power control unit 1 of arranging, around the network transmission unit 2 that power control unit 1 dispersion was arranged, the second that sets gradually at the outer layer blocks water around covering 3, inner sheath 4, armor 5, oversheath 6 as shown in figure 1.

Armor 5 is the compound armor that blocks water in this embodiment, and the compound armor that blocks water all winds the package band layer that blocks water for weaving inside and outside of armor at the tinned copper wire, forms to block water and weaves armor + block water around the sandwich structure of band + tinned copper wire, the utility model discloses a compound form, the armor is woven to the tinning inside and outside all winds the package band layer that blocks water, and the three-layer plays water, armor, enhancement, guard action jointly, guarantees the resistance to compression nature of blocking water, deep sea that the deep sea was used. The armor adopts the wrapping tape that blocks water, and processing is nimble controllable, more is fit for batch industrialization and implements, and the water-blocking tape intensity of inside and outside wrapping is higher, plays better protective effect to the cable under the deep sea. Of course, the tinned copper wire braided armor in the composite water-blocking armor middle layer can also be a copper wire braided armor with other plating layers.

As shown in fig. 3 is a schematic structure diagram of power control unit 1, it can be seen from the figure that power control unit 1 includes two filling cores 1.3, two sets of injecting glue conductors 1.1, and the skin of every group injecting glue conductor 1.1 all is provided with compound insulation layer 1.2 in order to form compound insulation core 7 (fig. 2), still includes that first water blocking winds covering 1.4, and first water blocking winds covering 1.4 and winds two filling cores 1.3 and two sets of compound insulation core 7.

The composite insulating layer 1.2 comprises a polyethylene inner insulating layer and a polyolefin outer insulating layer, and the thickness ratio of the inner insulating layer to the outer insulating layer is 1: 1-2; the polyethylene is waterproof and moistureproof on the inner layer and is more tightly coated with the water-blocking conductor, and the polyolefin is on the outer layer and is more tightly bonded with the water-blocking adhesive by utilizing the performance of the non-polar material, so that the aim of resisting high water pressure is fulfilled.

As shown in fig. 4, which is a schematic structural diagram of the network transmission unit 2, it can be seen from the diagram that the network transmission unit 2 includes a filler core 1.3 and a conductor 2.1, an insulating layer 2.2 is disposed on an outer layer of the conductor 2.1, the conductor 2.1 and the insulating layer 2.2 together form a network transmission core 8, and a shielding layer is disposed on outer layers of the filler core 1.3 and the network transmission core 8; the mode of setting up of shielding layer sets up the shielding layer again after 8 transposition injecting glues of filler core 1.3 and network transmission sinle silk, and the shielding layer includes aluminium foil around covering 2.3 and weave shielding layer 2.4, and the aluminium foil is taken the lid rate and is 40 ~ 50% around covering 2.3, and the thickness of aluminium foil around covering 2.3 is 0.06mm, weaves shielding layer 2.4's weaving density and is not less than 88%. The aluminum foil lapping and the tinned copper wire weaving composite shielding are adopted, so that the change of the comprehensive dielectric property of the network caused by glue injection is improved (the comprehensive dielectric constant inside a network unit formed after shielding is between 2.6 and 3.0, and the attenuation of the network signal can be controlled within a standard range in such a dielectric constant range), and the network signal can still reach the network transmission property in the glue injection-free state; the double-layer composite shielding increases the mechanical performance of the network unit, so that the structure of the network unit is kept stable in deep sea, and the transmission performance is stable.

The utility model discloses preparation process of composite cable includes:

1) preparation of the power control unit 1:

a glue injection conductor 1.1 is formed by stranding a plurality of strands of copper cores containing plating layers and then filling quick-drying neoprene into a stranding die to fill gaps;

b, a compound insulation layer 1.2 consisting of a polyethylene inner insulation layer and a polyolefin outer insulation layer is extruded in a double-layer co-extrusion mode outside the glue injection conductor 1.1, a compound insulation wire core 7 consists of the glue injection conductor 1.1 and the compound insulation layer 1.2, the compound insulation wire core 7 is subjected to irradiation crosslinking, and the thermal extension value of the compound insulation layer after irradiation is less than or equal to 30%;

c, twisting a plurality of composite insulating wire cores 7 with a plurality of filling cores 1.3 to form the power control unit 1, twisting a plurality of power control units 1 into a cable, injecting single-component room temperature vulcanized silica gel in front of a forming die during cable formation, and winding and wrapping a first water-blocking wrapping layer 1.4;

2) preparing the network transmission unit 2:

a, an insulating layer 2.2 is extruded on the outer layer of a conductor 2.1 to form a network transmission wire core 8;

b, twisting a plurality of network transmission wire cores 8 and a plurality of filling cores 1.3;

c, arranging a shielding layer outside the optical cable obtained in the step b to form a network transmission unit 2; the shielding layer in the embodiment is a composite shielding layer consisting of an aluminum foil wrapping 2.3 and a braided shielding 2.4, specifically, after the step b, single-component room-temperature vulcanized silica gel is added in front of a forming die and wrapped by a single-sided polyester aluminum foil d, the aluminum surface faces outwards, the aluminum foil wrapping covering rate is 40% -50%, then a layer of tinned copper wire shielding e is braided by a braiding machine, the braiding density is more than or equal to 88%, and the aluminum foil and the tinned copper wire are braided to form the composite shielding layer together.

3) And (2) uniformly arranging a plurality of network transmission units 2 on the periphery of the stranded cable of the power control unit 1 obtained in the step (1), stranding the stranded cable into a cable, pouring single-component room-temperature vulcanized silica gel in front of a forming die, and wrapping a water-blocking tape to form a second water-blocking wrapping layer 3, wherein the wrapping and covering rate of the water-blocking wrapping tape is 40-50%.

4) Extruding an inner sheath 4 on the outer layer of the cable obtained in the step 3, and irradiating and crosslinking the extruded inner sheath 4 by an electron accelerator;

5) the armor 5 is arranged outside the inner sheath 4, the armor 5 in the embodiment is a composite armor, and the composite water-blocking armor is formed by wrapping water-blocking tape layers inside and outside the woven armor. Therefore, the water blocking tape is wrapped outside the inner sheath during preparation, the tinned copper wire armor is woven on the wrapped water blocking tape by a weaving machine, the weaving density is more than or equal to 80%, the water blocking tape is wrapped outside the armor, and the armor 5 achieving the water blocking effect is formed by the inner water blocking tape, the outer water blocking tape and the middle woven armor layer.

6) An outer sheath 6 is extruded outside the armor 5, and the outer sheath 6 is irradiated and crosslinked by an electron accelerator.

The embodiment of the utility model provides a compound cable's that prepares experiment verifies the effect as follows:

1. longitudinal water tightness test

Experiments prove that the composite cable can achieve the water leakage prevention of 6.75Mpa water pressure of a cable with the length of 1.5 meters. Longitudinal watertight test method: the length of the test sample is 1.5 meters, one end of the test sample is immersed in water of the sealed hydrostatic test device, the other end of the test sample passes through the stuffing box, the contact length of the test sample sheath and the sealant in the stuffing box is 140mm +/-10 mm, then the test sample sheath is pressurized to 6.75MPa of water pressure, the test sample sheath is kept for 2 hours, and no water drops at the end of the cable.

2. Mechanical strength

The utility model discloses cable, the inside and outside one deck water-blocking tape that respectively increases of armor, the rate of taking the lid of water-blocking tape is (40-50)%, and this department uses the tensile strength of water-blocking tape and is greater than or equal to 10 MPa. The two layers of the wrapping tape are added to further protect the cable core, so that the mechanical strength of the cable is enhanced, and meanwhile, the overall flexibility of the cable is increased.

3. Network transmission experiment

Experiments prove that the composite cable can realize underwater high-frequency network signal transmission, the 100-meter distance stable transmission of the gigabit Ethernet and the 50-meter distance stable transmission of the gigabit Ethernet. The vector network analyzer is used for testing indexes of characteristic impedance, attenuation, equal-level far-end crosstalk, equal-level near-end crosstalk and the like of a 100-meter cable in a frequency range of 4-250 MHz respectively, and the indexes all meet the standard transmission requirements of 'YD/T1019-2013 polyolefin insulation level twisted pair cable for digital communication'. The indexes of characteristic impedance, attenuation, equal-level far-end crosstalk, equal-level near-end crosstalk and the like of a 50-meter cable in a frequency range of 4-500 MHz are tested, and the standard requirements of YD/T1019-2013 polyolefin insulation level twisted pair cable for digital communication are met.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention.

Claims (8)

1. A longitudinal watertight composite cable for deep sea underwater vehicle is characterized by comprising:

the power control unit (1), the power control unit (1) comprises a plurality of composite insulating wire cores (7), each composite insulating wire core (7) comprises an adhesive injection conductor (1.1), a composite insulating layer (1.2) is arranged outside each adhesive injection conductor (1.1), a first water-blocking wrapping layer (1.4) is arranged on the outer layer of each twisted composite insulating wire core (7), each composite insulating layer (1.2) comprises a polyethylene inner insulating layer and a polyolefin outer insulating layer, and the thickness ratio of the inner insulating layer to the outer insulating layer is 1: 1-2;

the network transmission unit (2), the network transmission unit (2) includes a plurality of network transmission cable cores (8), the network transmission cable cores (8) include network transmission conductors (2.1), the outside of the network transmission conductors (2.1) is provided with an insulating layer (2.2), and the outside of the twisted network transmission cable cores (8) is provided with a shielding layer;

the power control unit (1) and the network transmission unit (2) are twisted, and after the twisting, the second water-blocking wrapping layer (3), the inner sheath (4), the armor (5) and the outer sheath (6) are sequentially arranged.

2. The composite cable according to claim 1, wherein the shielding layer of the network transmission unit (2) comprises an aluminum foil wrapping layer (2.3) and a braided shielding layer (2.4) which are arranged from inside to outside, the wrapping coverage rate of the aluminum foil wrapping layer (2.3) is 40-50%, and the braiding density of the braided shielding layer (2.4) is not lower than 88%.

3. A composite cable according to claim 2, wherein the armour (5) is a composite water-blocking armour comprising woven armour and a water-blocking tape layer provided on both sides of the woven armour.

4. The composite cable according to claim 3, wherein the power control unit (1) comprises 4 to 19 groups of composite insulated wire cores (7) and 2 to 10 groups of network transmission units (2).

5. The composite cable according to claim 4, wherein the plurality of groups of composite insulated wire cores (7) are contained in the power control unit (1), and the plurality of groups of composite insulated wire cores (7) are stranded into the cable while being impregnated with the single-component room temperature vulcanized silicone rubber.

6. The composite cable according to claim 5, wherein the network transmission units (2) are in multiple groups, and the multiple groups of network transmission units (2) are dispersedly twisted around the power control unit (1) while injecting single-component room temperature vulcanized silicone rubber.

7. The composite cable according to claim 1, wherein the composite insulated wire core (7), the inner jacket (4) and the outer jacket (6) are radiation crosslinked, and the thermal elongation of the composite insulated wire core (7) after irradiation is no greater than 30%.

8. The composite cable according to claim 1, further comprising a filler core (1.3), said filler core (1.3) being stranded with the composite insulated wire core (7); and/or twisted with a network transmission conductor (2.1) with an insulating layer (2.2); and/or twisted with the power control unit (1) and the network transmission unit (2).

Images