CN106772845A - A kind of heavy in section submarine optical fiber cable - Google Patents

Abstract

The invention discloses a large cross-section submarine optical cable, which includes an optical cable core and an outer sheath of the optical cable. The cable core is composed of a stainless steel optical unit, an inner armor wire, a copper tube, a copper wire, a water-blocking material, a shielding layer, and an insulating sheath. The inner armor wire is twisted on the stainless steel optical unit, and then wrapped by copper tube, the copper wire is twisted outside the copper tube, the water-blocking material and the shielding layer are wrapped on the copper wire, and the water-blocking material and the shielding layer are covered with an insulating sheath The outer sheath is composed of armored steel wire, asphalt, and polypropylene rope from the inside to the outside. The outer armored steel wire is twisted on the insulating sheath, and the outer armored steel wire is covered with polypropylene rope. The outer armored steel wire is connected between the insulating sheath and the The gaps between the polypropylene ropes are filled with asphalt. The invention has a reasonable structure, can effectively prevent steel wires from corroding, prolong the service life in seawater, effectively protect the integrity of the cables, have superior mechanical and physical properties, and can prevent anchor dragging The damage caused by dragging and offshore excavation, the polypropylene rope has strong environmental adaptability and can guarantee the service life in seawater.

Description

A large cross-section submarine optical cable

technical field

The invention relates to a large-section submarine optical cable.

Background technique

At present, the electrical performance of the submarine optical cables used in domestic occasions with high requirements for marine power and signal transmission is not ideal, and the use of the now common submarine photoelectric composite cables has improved electrical performance, but the production cost Then it will be doubled several times, and it is not suitable for large-length production. At present, China's economy has developed into an export-oriented economy that is highly dependent on the ocean, and its dependence on marine resources and space has increased significantly. The maritime rights and interests outside the jurisdictional sea area also need to be continuously maintained and expanded. Submarine optical cables are the backbone. It has an irreplaceable role, and the new large-section submarine optical cable has improved the performance of the submarine optical cable to a new level.

Contents of the invention

The object of the present invention is to provide a large-section submarine optical cable.

The technical scheme adopted in the present invention is:

A large cross-section submarine optical cable, including an optical cable core and an outer sheath of an optical cable, the optical cable core is composed of a stainless steel optical unit, an inner armor wire, a copper tube, a copper wire, a water-blocking material, a shielding layer, and an insulating sheath. The inner armor steel wire is twisted on the stainless steel optical unit, and then wrapped by a copper tube, the copper wire is twisted outside the copper tube, the water-blocking material and the shielding layer are wrapped on the copper wire, the water-blocking material and the shielding layer The outer layer of the optical cable is covered with an insulating sheath. The outer sheath of the optical cable is composed of outer armored steel wire, asphalt, and polypropylene rope from the inside to the outside. The outer armored steel wire is twisted on the insulating sheath, and the outer armored steel wire is The polypropylene rope is covered, and the outer armor steel wire is filled with asphalt in the gap between the insulating sheath and the polypropylene rope.

The number of cores of the stainless steel light unit is less than or equal to 24 cores.

The inner armor wires are three types of unequal inner armor wires, the stranding direction is leftward, and the three types of unequal diameter steel wires are all high-strength phosphating steel wires.

The copper pipe is welded by high-quality copper strips through argon arc welding, and is tightly wrapped.

The copper wire twisted layer is formed by twisting 24 copper wires of the same type and specification in the inner layer and 30 outer layers, and the twisting direction is left.

The water-blocking material and the shielding layer are composed of a layer of semi-conductive resistance water tape wrapped around a layer of shielding layer.

The insulating sheath is formed by extruding high-density polyethylene.

The outer armor wire is single-layer or double-layer.

The invention has the advantages of reasonable structure, effective prevention of steel wire corrosion, prolonging the service life in sea water, effective protection of cable integrity, superior mechanical properties, physical properties and other characteristics, and preventing damage caused by anchor dragging and offshore excavation. The polypropylene rope has strong environmental adaptability and can guarantee a long service life in seawater.

Description of drawings

The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

Fig. 1 is the structural sectional view of single armored submarine optical cable of the present invention;

Fig. 2 is a structural cross-sectional view of the double-armored submarine optical cable of the present invention.

Among them: 1. Stainless steel light unit; 2. Inner armor wire; 3. Copper pipe; 4. Copper wire; 5. Water blocking material and shielding layer; 6. Insulation sheath; 7. Outer armor wire; 8. Asphalt; 9 , Polypropylene rope.

detailed description

As shown in Figures 1 and 2, a large-section submarine optical cable includes an optical cable core and an outer sheath of an optical cable. The optical cable core is composed of a stainless steel optical unit 1, an inner armor wire 2, a copper tube 3, a copper wire 4, and a water-blocking material. And shielding layer 5, insulating sheath 6, the inner armor steel wire 2 is twisted on the stainless steel optical unit 1, and then wrapped by copper tube 3, copper wire 4 is twisted outside the copper tube 3, water-blocking material and shielding layer 5 wrapped On the copper wire 4, the water-blocking material and the shielding layer 5 are covered with an insulating sheath 6, and the outer sheath of the optical cable is composed of outer armored steel wire 7, asphalt 8, and polypropylene rope 9 from the inside to the outside, and the outer armored steel wire 7 is stranded Fitted on the insulating sheath 6, the outer armored steel wire 7 is covered with polypropylene rope 9, the outer armored steel wire 7 is filled with asphalt 8 in the gap between the insulating sheath 6 and the polypropylene rope 9, and the diameter of the stainless steel light unit is 2.7mm , the number of stainless steel optical unit cores is less than or equal to 24 cores, the excess length of the optical fiber is 0.4%-0.5%, and the inner armor wires are three kinds of different inner armor wires, specifications: φ1.15mm*8, φ1.54mm*8, φ1 .63mm*8 strands, the stranding direction is left, the three kinds of unequal diameter steel wires are all high-strength phosphating steel wires, the structural stability of these unequal steel wires twisted is high, the geometric shape is fixed, and it is suitable for the stainless steel light unit The bending effect is very small. The copper tube is welded by high-quality copper strip through argon arc welding. The specification of the copper strip is 36mm wide x 0.6mm thick. Electrical performance, mechanical performance and physical performance, the copper wire stranding layer is made of 24 copper wires of the same type and specification in the inner layer and 30 outer layers, the twisting direction is left, and the copper wire is annealed copper wire , Copper wire specification: φ1.3mm, the cable core stranded by this structure further improves the electrical and mechanical properties of the cable, and at the same time can protect the cable core. The water belt is wrapped around a layer of shielding layer. The thickness of the selected water blocking belt is 0.5mm. After encountering water, it can expand rapidly and block the copper wire and shielding copper tape, so as to achieve a good waterproof effect. The shielding layer is shielded by copper tape, which is overlapped and wrapped outside the semi-conductive resistance water belt, which can resist electromagnetic induction, poor grounding and power line conduction interference, and reduce inductance. The effect of emitting and preventing short-circuit current from damaging the cable core is also ideal for waterproofing. The insulating sheath is formed by extruding high-density polyethylene with a thickness of 10.4mm. This material is resistant to stress cracking in seawater environments Superior, excellent electrical performance, aging resistance, high and low temperature resistance, anti-oxidation, single-layer or double-layer armored steel wire, armored steel wire model specification: φ3.2mm, high-strength galvanized steel wire, single-layer armored, There are 26 galvanized steel wires, and the stranding direction is leftward. When double armored, the inner layer of galvanized steel wires is 26, and the outer layer is 32 strands, and the stranding direction is leftward. The zinc layer can effectively prevent the corrosion of the steel wires and ensure the The life of steel wire in seawater is as long as 25 years. The tensile strength of single-layer armored submarine optical cable can reach 300kN, and the tensile strength of double-layer armored submarine optical cable can reach 500kN. The asphalt coated on the surface of galvanized steel wire can reach Play waterproof and anti-corrosion role.

The invention has a reasonable structure, can effectively prevent steel wire corrosion, prolong the service life in seawater, effectively protect the integrity of the cable, have superior mechanical properties, physical properties, etc., and can prevent damage caused by anchor dragging and offshore excavation. It has strong environmental adaptability and can guarantee the service life in seawater.

Claims (8)

1. A large cross-section submarine optical cable is characterized in that: comprise optical cable core, optical cable outer sheath, described optical cable core is made of stainless steel light unit, inner armor steel wire, copper pipe, copper wire, water-blocking material and shielding layer, The inner armor wire is twisted on the stainless steel light unit, and then wrapped by a copper tube. The copper wire is twisted outside the copper tube, and the water-blocking material and shielding layer are wrapped on the copper wire. The water-blocking material and the shielding layer are covered with an insulating sheath. The outer sheath of the optical cable is composed of outer armored steel wire, asphalt, and polypropylene rope from the inside to the outside. The outer armored steel wire is twisted on the insulating sheath. The outer armored steel wire is covered with polypropylene rope, and the gap between the outer armored steel wire and the polypropylene rope is filled with asphalt. 2. A large-section submarine optical cable according to claim 1, wherein the number of cores of the stainless steel optical unit is less than or equal to 24 cores. 3. A large cross-section submarine optical cable according to claim 1, characterized in that: said inner armor wires are three kinds of unequal inner armor wires, the stranding direction is leftward, and the three kinds of unequal diameter steel wires are all It is a high-strength phosphating steel wire. 4. A large cross-section submarine optical cable according to claim 1, characterized in that: the copper tube is welded by high-quality copper strips through argon arc welding, and is tightly wrapped. 5. A large cross-section submarine optical cable according to claim 1, characterized in that: the copper wire stranding layer is formed by twisting 24 copper wires of the same type and specification in the inner layer and 30 outer layers, Combined direction is left. 6. A large cross-section submarine optical cable according to claim 1, characterized in that: the water blocking material and the shielding layer are composed of a layer of semiconductive resistance water tape wrapped around a layer of shielding layer. 7. A large-section submarine optical cable according to claim 1, wherein the insulating sheath is formed by extruding high-density polyethylene. 8. A large cross-section submarine optical cable according to claim 1, characterized in that: the outer armor wire is single-layer or double-layer.