CN203085280U - Shallow seabed symmetrical audio frequency communication cable - Google Patents

Abstract

The utility model relates to a shallow seabed symmetrical audio communication cable, in which a copper conductor is extruded and covered with a high-voltage polyethylene insulating layer to form an insulated wire core, and four insulated wire cores of different colors are stranded to form a star twisted group, and the four star twisted groups are respectively surrounded. Outside the polypropylene cushion core, there are measuring copper wires in the polypropylene cushion core; signal lines are respectively arranged between the peripheries of two adjacent star twisted groups and twisted into a cable core, and the outer circumference of the cable core is covered with a polyester film tape in turn. , high-pressure polyethylene sheath, first impregnated hemp rope lining, first asphalt coating layer, copper alloy wire armor layer, second asphalt coating layer, second impregnated hemp rope lining layer, third asphalt coating layer , aluminum-magnesium alloy steel wire armor layer, the fourth asphalt coating layer, the first impregnated hemp tape layer, the fifth asphalt coating layer, the second impregnated hemp tape layer, the sixth asphalt coating layer and plastic film anti-sticking Layer. The cable can transmit communication and control signals, and has a stable structure, anti-seepage, corrosion resistance, good resistance to pulling, and stable transmission of signals when encountering water shock.

Description

A shallow sea submarine symmetrical audio communication cable

technical field

The utility model relates to a communication cable, in particular to a shallow seabed symmetrical audio communication cable.

Background technique

With the development and utilization of marine energy, more and more submarine cables are used as current-carrying equipment for submarine signal transmission, and the technical requirements are also getting higher and higher. In particular, cables are required to have excellent mechanical, physical and electrical properties, and to ensure that they can withstand the impact of seawater immersion. Excellent signal transmission performance, anti-seepage, seawater corrosion resistance, tensile mechanical properties, long service life and high reliability. Ordinary communication cables used on the seabed will either cause cable damage and serious signal attenuation due to the impact of sea water due to their light weight, or they will be easily damaged due to their heavy weight due to their high tensile force; Arrange the communication cable and the power cable together to form a composite cable. Although this structure ensures the structural safety of the communication cable, it is easy to cause the strong electric field of the power cable to affect the signal transmission of the communication cable, and for some cables that do not need power Where only communication cables are needed, if composite cables are used, resources will be wasted seriously, and if composite cables are not used, it will easily lead to poor adaptability of communication cables to the environment.

Utility model content

The purpose of the utility model is to overcome the problems existing in the prior art, and provide a shallow sea submarine symmetrical audio communication cable, which has a stable structure, suitable weight, anti-seepage, seawater corrosion resistance, good tensile mechanical properties, and water impact The signal transmission is stable, and it can be used for communication between the mainland and offshore islands in sections or beaches where the shallow seabed conditions are relatively complicated and require special mechanical protection.

In order to achieve the above purpose, the utility model provides a shallow sea submarine symmetrical audio communication cable, the solid circular copper conductor is extruded with a high-pressure polyethylene insulating layer to form an insulating core, and four insulating cores of different colors are stranded Synthetic star-quad group, the two on the diagonal form a working pair; the four star-quad groups are respectively wound with ribbons of different colors and arranged in a circular array tangentially in turn, and the four star-quad groups The central area is provided with a star-shaped polypropylene cushion core, and the polypropylene cushion core is provided with measuring copper wires; signal lines are respectively provided between the peripheries of two adjacent star-quad groups, and the four signal lines and the four The star-quad groups are twisted together around the polypropylene pad core to form a cable core, and the outer circumference of the cable core is overlapped and wrapped with a polyester film tape, and the signal line and the star-quad group are respectively inscribed on the A polyester film belt, the outer periphery of the polyester film belt is extruded with a high-pressure polyethylene sheath, and the outer periphery of the high-pressure polyethylene sheath is uniformly woven with a first impregnated hemp rope lining, and the first impregnated hemp rope lining is The outer periphery of the layer is coated with a first asphalt coating layer, and the outer periphery of the first asphalt coating layer is tightly wrapped with a copper alloy wire armor layer in a concentric twisting manner, and the outer periphery of the copper alloy wire armor layer is coated There is a second asphalt coating layer, the outer periphery of the second asphalt coating layer is evenly woven with a second impregnated hemp rope lining, and the outer periphery of the second impregnated hemp rope lining is coated with a third asphalt coating layer, The outer periphery of the third asphalt coating layer is tightly wrapped with an aluminum-magnesium alloy steel wire armor layer in a concentric twisting manner, and the outer periphery of the aluminum-magnesium alloy steel wire armor layer is coated with a fourth asphalt coating layer , the outer periphery of the fourth asphalt coating layer is evenly wrapped with a first impregnated hemp tape layer, the outer periphery of the first impregnated hemp tape layer is coated with a fifth asphalt coating layer, and the fifth asphalt coating layer The outer periphery of the second impregnated hemp tape layer is evenly wrapped, the outer periphery of the second impregnated hemp tape layer is coated with the sixth asphalt coating layer, and the outer periphery of the sixth asphalt coating layer is wrapped with a plastic film anti-sticking layer.

Compared with the prior art, the utility model has achieved the following beneficial effects: (1) Polypropylene has excellent physical and mechanical properties, bending fatigue resistance and non-hygroscopic properties. As a cushion core, it can increase the mechanical properties of the cable on the one hand, and at the same time The star-shaped polypropylene cushion core can stabilize the structure of the communication cable core, fix the four star-quad groups well, and avoid the displacement of the star-quad group when encountering external forces, which will affect the transmission of communication signals. (2) The structure of the star-quad group is relatively stable. The two on the diagonal form a working pair, and the four star-quad groups form eight working pairs to transmit audio signals. This structure avoids twisting two by two and then eight The structure caused by twisted wire pairs is loose and easy to deform, easy to crosstalk, and the cable outer diameter is too large. (3) The high-voltage polyethylene insulating layer has a compact structure, low density, high mechanical strength, and good electrical insulation performance. The conductor adopts a single solid circular copper conductor, which can eliminate the disadvantages of large signal attenuation caused by the use of twisted copper wires as conductors in the past. , which is conducive to the stability of signal transmission and ensures the reduction of inherent attenuation during cable operation; at the same time, the use of a single solid conductor can reduce the unbalanced resistance between wire pairs and stabilize communication signal transmission. (4) Measuring the copper wire can detect the transmission site conditions of the submarine communication cable, and placing it in the center together with the polypropylene cushion core can ensure the twisting roundness of the measuring copper wire, so that the external force on the cable is minimized when the cable is bent, ensuring the detection the accuracy of the results. (5) The signal line can transmit control signals, and it can realize the dual performance of communication transmission and control signal transmission of the entire cable when twisted together with the star-quad group, reducing the cost in actual engineering; the signal line is located in the peripheral gap of the star-quad group , which can not only make the cable core more round, compact and dense, but also reduce the diameter of the cable core. (6) The overlapping wrapping of the polyester film tape can tightly wrap the cable core. On the one hand, it avoids the looseness of the cable core. At the same time, the polyester film has excellent waterproof performance, moisture-proof and infiltration performance, which can be beneficial to protect the insulation from moisture and reduce the insulation. (7) The high-pressure polyethylene sheath has a dense structure, low density, high mechanical strength, good waterproof permeability, and good electrical insulation performance. It can ensure that the cable has long-term resistance to water immersion and scratching, and enhances the safety of submarine cables. (8) The impregnated hemp rope lining makes the metal armor layer and the sheath layer or the asphalt coating layer well isolated, weakening the internal pressure of the outer metal armor and the possible burrs on the armor wire, etc. Defects cause damage to the inside; there are gaps in the hemp rope weaving, and each single hemp rope does not affect each other, which can reduce the stress in cable bending and enhance the toughness of the cable; the impregnated hemp rope has high mechanical strength, good flexibility, and excellent performance. Excellent deformation recovery, able to bear a large axial force, can greatly enhance the longitudinal tensile performance of the cable. (9) Asphalt has good meltability and process performance, which is convenient for uniform coating on the outer periphery of the cable core. Especially, asphalt has excellent waterproof performance and corrosion resistance, which can prevent external seawater from penetrating into the cable after a long time, causing hidden dangers in cable operation. (10) The copper alloy wire armor layer can not only isolate the magnetic field, avoid the loss caused by the eddy current hysteresis, increase the current carrying capacity, but also have greater mechanical strength than copper, while the cost is lower than copper, and has excellent seawater corrosion resistance , It is of great benefit to the long-term safe operation of the cable. (11) The armor layer of aluminum-magnesium alloy steel wire can well enhance the mechanical tensile strength of the cable, protect the cable from mechanical damage, and has excellent seawater corrosion resistance, providing mechanical protection for the cable during its service life. Protect. (12) The impregnated hemp tape layer has high mechanical strength, good flexibility, excellent deformation recovery, waterproof performance, and is relatively dense after winding. It can prevent further seawater from entering when it expands with water, and can tightly wrap the cable. For a large radial force, the use of double layers can enhance the lateral force performance of the cable and make the cable resistant to seawater impact. When the external force impacts the cable, the impregnated hemp tape layer forms a buffer zone to weaken the internal force. (13) The plastic film anti-adhesion layer can prevent the melting and adhesion of the asphalt coating layer during high-temperature production or construction operations, resulting in adhesion between adjacent cables and affecting operations.

As a preferred solution of the present utility model, the diameter of the solid circular copper conductor is 1.2mm, the nominal thickness of the high-pressure polyethylene insulating layer is 1.0mm and the minimum thickness is not less than 90% of the nominal thickness, and the maximum thickness is not less than 90% of the nominal thickness. Greater than 110% of the nominal thickness, the diameter deviation measured by any vertical section does not exceed 10%; the stranding pitches of the four star stranding groups are different. The use of a single solid circular copper conductor can eliminate the disadvantages of large signal attenuation caused by the use of stranded copper wires as conductors in the past, which is conducive to stable signal transmission and ensures the reduction of inherent attenuation during cable operation; at the same time, the use of a single The solid conductor can reduce the unbalanced resistance between the wire pairs and stabilize the transmission of communication signals; the DC resistance of the insulated wire core at 20°C is not greater than 22.8Ω/km; the insulation resistance between the wire pairs is not less than 10000 MΩ·km, The insulation resistance of the wire core to the ground is not less than 10000 MΩ·km; the inherent attenuation of the wire pair (0.8kHz and 8.5kHz) is not more than 0.87dB/km; the near-end crosstalk attenuation (0.8kHz and 8.5kHz) is not less than 78.17dB/km km; Far-end crosstalk protection (0.8kHz and 8.5kHz) is not less than 17.81dB/km; 50Hz AC voltage test line pair 2000V/5min without breakdown, core to ground 2000V/5min without breakdown.

As a preferred solution of the present utility model, the measuring copper wire is twisted by seven annealed copper wires with a diameter of 0.3 mm, and the twisted pitch ratio is 20 to 22 times; the thickness of the polyester film strip is 0.05 mm. mm and is overlapping wrapping; the nominal thickness of the high pressure polyethylene sheath is 1.6~2.0mm, the minimum thickness is not less than 90% of the nominal thickness, the maximum thickness is not greater than 110% of the nominal thickness, and any vertical The deviation of the measured diameter of the section shall not exceed 20%. According to IEC 229.4-1, the high-pressure polyethylene sheath was soaked in water and scraped for 24 hours, then bent and pulled on the angle steel with a force of 345N, applied a voltage of DC20kV for 1 minute, and then applied a voltage of 37.5kV ± 10 times, no cracks, no naked eyes Visible cracks.

As a preferred solution of the present utility model, the first impregnated hemp rope lining layer and the second impregnated hemp rope lining layer are respectively concentrically and tightly woven with 2.5mm impregnated cable hemp rope.

As a preferred solution of the present utility model, the first asphalt coating layer, the second asphalt coating layer, the third asphalt coating layer, the fourth asphalt coating layer, the fifth asphalt coating layer and the sixth asphalt coating layer The layers are coated with asphalt that does not crack at low temperature -20°C and does not drip at high temperature 90°C.

As a preferred solution of the present utility model, the diameter of the copper alloy wire of the copper alloy wire armor layer is 6.0 ± 0.03 mm, and the raw material components and weight content are as follows, copper: iron: lead: zinc = (89.0 ~ 91.0) : (0.01~0.05): (0.01~0.05): 10; the diameter of the aluminum-magnesium alloy steel wire armor layer is 6.0±0.03 mm; the copper alloy wire armor layer and the aluminum-magnesium alloy steel wire The stranding direction of the wire armor layer is left. The copper alloy wire armor layer can not only isolate the magnetic field, avoid the loss caused by the eddy current hysteresis, increase the carrying capacity, but also have greater mechanical strength than copper, while the cost is lower than copper, and has excellent seawater corrosion resistance. The long-term safe operation of the cable is of great benefit; the aluminum-magnesium alloy steel wire armor layer has high mechanical tensile strength, can protect the cable from mechanical damage, and has excellent seawater corrosion resistance.

As a preferred solution of the present invention, the first impregnated hemp tape layer and the second impregnated hemp tape layer are respectively formed by overlapping and winding impregnated cable hemp tapes with a thickness of 2.0 mm, and the winding directions of the two are opposite. Two layers of reverse helical winding can ensure the stability of the structure, and as the outer protective layer of the cable, it has comprehensive waterproof performance.

As a preferred solution of the present invention, the outer periphery of the anti-adhesion layer of the plastic film is coated with a talc powder slurry layer. The talcum powder layer can reduce the friction between the outer layers of the cables and prevent the outer layers of the cables from sticking to each other.

Description of drawings

Fig. 1 is a structural schematic diagram of the shallow sea submarine symmetrical audio communication cable of the utility model.

In the figure: 1. Polypropylene cushion core; 2. Measuring copper wire; 3. Star stranded group; 3a. Insulated wire core; 3b. Color ribbon; 4. Signal line; 5. Polyester film tape; 6. High pressure polyethylene Sheath; 7. The first impregnated hemp rope lining; 8. The first asphalt coating layer; 9. Copper alloy wire armor layer; 10. The second asphalt coating layer; 11. The second impregnated hemp rope lining; 12. The third asphalt coating layer; 13. Aluminum-magnesium alloy steel wire armor layer; 14. The fourth asphalt coating layer; 15. The first impregnated hemp tape layer; 16. The fifth asphalt coating layer; 17. The second impregnated burlap tape layer; 18. The sixth asphalt coating layer; 19. The plastic film anti-adhesion layer. the

Detailed ways

The utility model shallow sea submarine symmetrical audio communication cable is manufactured according to the following steps in sequence: (1) A high-voltage polyethylene insulating layer with a nominal thickness of 1.0mm is extruded on the outside of a solid circular copper conductor with a diameter of 1.2mm to form an insulating core 3a ; The nominal thickness of the high-pressure polyethylene insulation layer is 1.0mm and the minimum thickness is not less than 90% of the nominal thickness, the maximum thickness is not greater than 110% of the nominal thickness, and the diameter deviation measured by any vertical section does not exceed 10%.

(2) Twisting four insulated wire cores 3a of different colors into a star stranded group 3, and the two on the diagonal form a working pair; wrap different color ribbons 3b outside the star stranded group, and then combine the four The star-quad groups are arranged tangentially in a circular array on the outer periphery of the star-shaped polypropylene pad core 1. The twisting pitches of the four star-twist groups are different. The polypropylene pad core 1 is provided with a measuring copper wire 2 for measuring The wire 2 is twisted by seven annealed copper wires with a diameter of 0.3mm, and the pitch ratio of twisting is 20~22 times.

(3) Arrange the signal wires 4 between the peripheries of two adjacent star-quad groups, and then twist the four signal wires and the four star-quad groups around the polypropylene pad core to form a cable core.

(4) The outer periphery of the cable core is wrapped with a polyester film tape 5 with a thickness of 0.05mm; Pack high-pressure polyethylene sheath 6 with a nominal thickness of 1.6~2.0mm; the nominal thickness of high-pressure polyethylene sheath 6 is 1.6~2.0mm, the minimum thickness is not less than 90% of the nominal thickness, and the maximum thickness is not greater than the nominal thickness 110% of the thickness, and the diameter deviation measured by any vertical section does not exceed 20%.

(5) Use 2.5mm impregnated cable hemp rope on the outer periphery of the high-pressure polyethylene sheath 6 to weave the first impregnated hemp rope lining layer 7 concentrically and tightly, and coat the first asphalt coating on the outer periphery of the first impregnated hemp rope lining layer 7 Layer 8, tightly wrapping the copper alloy wire armor layer 9 in a concentric twisting manner on the outer periphery of the first asphalt coating layer 8, the diameter of the copper alloy wire in the copper alloy wire armor layer 9 is 6.0±0.03 mm, and the twisting direction It is left-handed, and the raw material composition and weight content are as follows, copper: iron: lead: zinc = (89.0~91.0): (0.01~0.05): (0.01~0.05):10.

(6) Coating the second asphalt coating layer 10 on the outer periphery of the copper alloy wire armor layer 9, and wrapping the second impregnated hemp rope concentrically and tightly with 2.5mm impregnated cable hemp rope on the outer periphery of the second asphalt coating layer 10 The lining layer 11 is coated with a third asphalt coating layer 12 on the outer periphery of the second impregnated hemp rope lining layer 11, and the outer periphery of the third asphalt coating layer 12 is tightly wrapped with aluminum-magnesium alloy steel wire armor in a concentric twisting manner Layer 13, the diameter of the armor layer 13 of aluminum-magnesium alloy steel wire is 6.0±0.03 mm, and the stranding direction is left.

(7) Coat the fourth asphalt coating layer 14 on the outer periphery of the aluminum-magnesium alloy steel wire armor layer 13, and use impregnated cable hemp tape with a thickness of 2.0mm to overlap and wind the fourth asphalt coating layer 14 to form the fourth asphalt coating layer 14. One impregnated hemp tape layer 15, the fifth asphalt coating layer 16 is coated on the outer periphery of the first impregnated hemp tape layer 15, and the impregnated cable hemp tape with a thickness of 2.0mm is overlapped and wound on the outer periphery of the fifth asphalt coating layer 16 to form The second impregnated hemp tape layer 17 , the winding direction of the second impregnated hemp tape layer 17 is opposite to that of the first impregnated hemp tape layer 15 .

(8) Coating the sixth asphalt coating layer 18 on the outer periphery of the second impregnated hemp tape layer 17, wrapping the plastic film anti-adhesion layer 19 on the outer periphery of the sixth asphalt coating layer 18, and the plastic film anti-adhesion layer 19 The outer periphery is coated with talcum powder slurry layer.

In the above steps, the first bitumen coating layer 8, the second bitumen coating layer 10, the third bitumen coating layer 12, the fourth bitumen coating layer 14, the fifth bitumen coating layer 16 and the sixth bitumen coating layer 18 are respectively coated with asphalt that does not crack at a low temperature of -20°C and does not drip at a high temperature of 90°C.

Conduct electrical performance tests on the finished cables made above, the results are as follows:

The above descriptions are only preferred feasible embodiments of the present utility model, and are not intended to limit the patent protection scope of the present utility model. In addition to the above embodiments, the utility model can also have other implementations. All technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the utility model.

Claims (7)

1. seabed, shallow sea symmetry voice communication cable, it is characterized in that: the solid circles copper conductor is extruded with high pressure polyethylene insulated layer outward and constitutes insulated wire cores, the described insulated wire cores of four different colours is twisted into the star quad stranding group, and it is right to be in work of cornerwise two formations; Four described star quad stranding groups are wound with the colour band of different colours and tangent successively arranged in arrays in the form of a ring respectively, and the central area of four described star quad stranding groups is provided with star polypropylene bedding core, is provided with the measurement copper cash in the described polypropylene bedding core; Be respectively equipped with holding wire between the periphery of adjacent two described star quad stranding groups, four described holding wires and four described star quad stranding group one common peripheral are twisted into cable core around described polypropylene bedding core, the overlapping mylar tape that is surrounded with of the periphery of described cable core, described holding wire and described star quad stranding group are inscribed within described mylar tape respectively, the periphery of described mylar tape is extruded with the polyethylene from high pressure process sheath, the periphery of described polyethylene from high pressure process sheath evenly is woven with the first dipping rope made of hemp lining, the periphery of the described first dipping rope made of hemp lining is coated with the first bitumen coated layer, the periphery of the described first bitumen coated layer closely is enclosed with the copper alloy wire armour with concentric strand around mode, the periphery of described copper alloy wire armour is coated with the second bitumen coated layer, the periphery of the described second bitumen coated layer evenly is woven with the second dipping rope made of hemp lining, the periphery of the described second dipping rope made of hemp lining is coated with the 3rd bitumen coated layer, the periphery of described the 3rd bitumen coated layer closely is enclosed with the magnesium alloy steel wire armour layer of aluminizing with concentric strand around mode, described periphery of aluminizing magnesium alloy steel wire armour layer is coated with the 4th bitumen coated layer, the periphery of described the 4th bitumen coated layer evenly is surrounded with the first dipping sack belt, the periphery of the described first dipping sack belt is coated with the 5th bitumen coated layer, the periphery of described the 5th bitumen coated layer evenly is surrounded with the second dipping sack belt, the periphery of the described second dipping sack belt is coated with the 6th bitumen coated layer, and the periphery of described the 6th bitumen coated layer is surrounded with the anti-adhesive linkage of plastic film.

2. seabed, shallow sea according to claim 1 symmetry voice communication cable, it is characterized in that, the diameter of described solid circles copper conductor is 1.2mm, the nominal thickness of described high pressure polyethylene insulated layer be 1.0mm and minimum thickness be not less than nominal thickness 90%, maximum ga(u)ge is not more than 110% of nominal thickness, and the diameter deviation that arbitrary vertical cross-section records is no more than 10%; The twisting pitch of four star quad stranding groups has nothing in common with each other.

3. seabed, shallow sea according to claim 1 symmetry voice communication cable is characterized in that the soft copper skein silk that described measurement copper cash is 0.3mm by seven diameters closes and forms, and stranded lay ratio is 20 ~ 22 times; The thickness of described mylar tape is the 0.05mm and the lap wound bag of attaching most importance to; The nominal thickness of described polyethylene from high pressure process sheath is 1.6 ~ 2.0mm, and minimum thickness is not less than 90% of nominal thickness, and maximum ga(u)ge is not more than 110% of nominal thickness, and the diameter deviation that arbitrary vertical cross-section records is no more than 20%.

4. seabed, shallow sea according to claim 1 symmetry voice communication cable is characterized in that, the described first dipping rope made of hemp lining and the second dipping rope made of hemp lining are formed by the tight with one heart braiding of the impregnated cable rope made of hemp of 2.5mm respectively.

5. seabed, shallow sea according to claim 1 symmetry voice communication cable, it is characterized in that, the described first bitumen coated layer, the second bitumen coated layer, the 3rd bitumen coated layer, the 4th bitumen coated layer, the 5th bitumen coated layer and the 6th bitumen coated layer adopt low temperature-20 ℃ not chap respectively, and 90 ℃ of bitumen coated of not dripping of high temperature form.

6. seabed, shallow sea according to claim 1 symmetry voice communication cable, it is characterized in that, the described first dipping sack belt and the second dipping sack belt are overlapping being entwined of impregnated cable sack band of 2.0mm by thickness respectively, and both winding directions are opposite.

7. seabed, shallow sea according to claim 1 symmetry voice communication cable is characterized in that the periphery of the anti-adhesive linkage of described plastic film is coated with the talc slurry layer.

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