CN207489506U - Total cross-section, which blocks water, seals multi signal composite rope - Google Patents

Abstract

The utility model discloses a full-section water-blocking and sealing multi-signal composite cable, which includes a cable core, an inner sheath, a shielding layer and an outer sheath, the cable core is provided with a wrapping tape, and the inner sheath and the outer sheath are extruded outside the wrapping tape. Sheath, a shielding layer is braided between the outer sheath and the inner sheath, and a wrapping tape is also provided between the shielding layer and the outer sheath. The cable core is composed of an optical unit, a power line, a coaxial line, The filling rope is helically twisted, and the twisted space of the cable core and the space of the shielding layer are filled with filling glue. The power line, coaxial line, twisted wire and outer sheath of the composite cable all contain a braided shielding layer, and are sheathed with chemical materials that are resistant to hydrolysis and wear, and the gaps between each unit are filled with water-blocking fillers. Glue, with the ability to withstand high-pressure water seepage across the entire cross-section. In underwater applications, it can provide not only the optical fiber for optical signal transmission, but also the power line for control signal transmission, the coaxial line for radio frequency signals and the twisted pair wire for communication signals, and the product is small in size, diverse in function and stable in transmission.

Description

Full-section water-blocking and sealing multi-signal composite cable

technical field

The utility model relates to the technical field of optical fiber cable and cable preparation, in particular to a full-section water-blocking and sealing multi-signal composite cable.

Background technique

my country is a major maritime development country and is very active in the fields of maritime transportation, offshore oil fields, offshore power generation, and maritime communications. In today's society, the development and utilization of water resources has become the development direction and trend of all countries in the world. More and more equipment is used in underwater operations, not only in military fields such as submarines, aircraft carriers, warships, and manned submersibles, but also in civilian tunnels. , Underwater monitoring system, ship, water power plant, island communication, water platform communication and other fields also need a communication optical cable product that can be used at a water depth of 500 meters to ensure that even if the cable sheath is damaged, it will not affect the electrical equipment of the equipment. It is safe and meets the performance requirements of the underwater communication system.

At present, the existing products include watertight towing photoelectric composite cables, retractable multi-group longitudinal water-sealed photoelectric composite cables, multi-core watertight coaxial cables, longitudinally sealed underwater optical cables, etc. Although watertight optical cables, watertight cables, and watertight photoelectric composite cables have appeared, these products have the following problems: 1. Cannot withstand 5MPa hydrostatic pressure; 2. Cannot provide three or more signals; 3. Signals are easily interfered and transmitted 3. It cannot withstand low temperature and seawater corrosion. Therefore, it is necessary to develop an underwater composite cable that satisfies multi-scenario applications.

Utility model content

In order to solve the above problems, the utility model provides a full-section water-blocking and sealed multi-signal composite cable, which has the advantages of low temperature resistance, water pressure resistance, corrosion resistance, various types of transmission signals, large transmission capacity, and wide application scenarios.

The technical scheme adopted by the utility model is: a full-section water-blocking and sealed multi-signal composite cable, including a cable core, an inner sheath, a shielding layer and an outer sheath, the cable core is provided with a wrapping tape, and the wrapping tape The inner sheath and the outer sheath are extruded, and a shielding layer is braided between the outer sheath and the inner sheath, and a wrapping tape is also arranged between the shielding layer and the outer sheath, and the cable core is made of The optical unit, the power line, the coaxial cable, the twisted pair, and the filling rope are helically twisted, and the twisted space of the cable core and the space of the shielding layer are filled with filling glue.

Further, the optical unit includes a strength member, a tight-buffered optical fiber, a wrapping layer and an optical unit sheath, the tight-buffered optical fiber is helically stranded outside the strength member, and the tight-buffered optical fiber is provided with a wrapping layer, the The sheath of the optical unit is extruded around the cladding, and the space between the tight-sleeved optical fiber, the strength member and the cladding is filled with filling glue. Preferably, the tight-buffered optical fiber is composed of a multi-mode optical fiber and a tight-buffered layer extruded outside the multi-mode optical fiber, the tight-buffered layer is made of nylon, polyurethane elastomer or low-smoke halogen-free flame-retardant material, the The reinforcement is a fiber-reinforced sleeve plastic rod or a water-blocking aramid fiber, the wrapping layer is a polyester tape or a water-blocking tape, and the optical unit sheath is made of polyurethane material.

Further, the power cord includes a cloth tape, a power cord shielding layer, a power cord insulation layer and a copper twisted wire, the copper twisted wire is twisted by at least seven silver-plated copper wires or nickel-plated copper wires, and the copper twisted wire The outside of the power cord is covered with an insulating layer of the power cord. The outer portion of the insulating layer of the power cord is a power cord shielding layer woven with galvanized or tinned copper wires. The outer side of the power cord shielding layer is a cloth tape. Fill the gap with filling glue. Preferably, the power cord insulation layer is made of FEP, PTFE, polyethylene, cross-linked polyethylene or silicone rubber material, the cloth wrapping tape is a cloth tape with a thickness of 0.1mm, and the power cord shielding layer is made of Galvanized or tinned copper wire with a diameter of 0.1mm is braided.

Further, the coaxial cable includes a copper wire, a coaxial cable insulation layer, an aluminum foil, a coaxial cable shielding layer and a coaxial cable sheath, the copper wire is a single silver-plated copper conductor or a nickel-plated copper conductor, and the copper The wire is covered with an insulating layer of the coaxial line, and the insulating layer of the coaxial line is covered with aluminum foil. The coaxial sheath is extruded outside the layer, and the gap of the coaxial shielding layer is filled with filling glue. Preferably, the coaxial cable insulating layer is made of fluoroplastic FEP or cross-linked polyethylene insulating material, the coaxial cable sheath is made of cross-linked polyethylene insulating material, and the coaxial cable shielding layer has a diameter of 0.1mm magnesium alloy wire or copper wire material braided.

Further, the pair of twisted wires includes two twisted insulated wires, aluminum foil, twisted wire shielding layer and cloth tape, and the insulated wires are insulated by a silver-plated copper conductor or a tinned copper conductor covered by a twisted wire The two insulated wires are twisted and covered with aluminum foil. The outside of the aluminum foil is a twisted pair shielding layer woven with magnesium-aluminum alloy wire or copper wire, and the twisted pair shielding layer is wrapped with cloth. Fill the gap between the tape, the insulated wire and the aluminum foil, and the gap between the shielding layer of the twisted wire with filling glue. Preferably, the twisted pair insulation layer is made of fluoroplastic FEP or cross-linked polyethylene insulation material, and the cloth wrapping tape is a cloth tape with a thickness of 0.1 mm.

The preparation process of the above-mentioned full-section water-blocking and sealing multi-signal composite cable includes the following steps:

1) Multiple tight-buffered optical fibers are helically stranded outside the strength member, and the mixed condensed non-expandable filler is filled into the gap after stranded, and then the wrapping layer is formed by a wrapping machine, and finally extruded through plastic The machine uses the extrusion process to extrude the sheath of the light unit outside the wrapping layer with an extrusion die to make the light unit;

2) A plurality of silver-plated copper wires or nickel-plated copper wires are twisted into a copper strand by a cage stranding machine, and the plastic extruder is used to extrude the insulation layer of the power line outside the copper strand by using an extrusion die. Then use galvanized or tinned copper wire to weave the power cable shielding layer outside the power cable insulation layer through the braiding machine, and then fill the gap of the power cable shielding layer with the mixed condensed non-expandable filler, and finally pass the wrapping machine on the power cable. The wire shielding layer is wrapped with cloth tape to make a power cord;

3) A single silver-plated copper conductor or nickel-plated copper conductor is used as a copper wire, and the coaxial insulating layer is extruded outside the copper wire by using an extrusion process through a high-temperature plastic extruder. The wire insulation layer is covered with aluminum foil by a longitudinal wrapping machine, and then the coaxial cable shielding layer is woven on the aluminum foil with magnesium-aluminum alloy or copper wire material through a braiding machine, and then the mixed condensed non-expandable filler is filled with the coaxial cable The gap of the shielding layer, and finally extrude the coaxial cable sheath outside the coaxial cable shielding layer through an extrusion die to make a coaxial cable;

4) Pass the silver-plated copper conductor or tin-plated copper conductor through the plastic extruder using the extrusion process, and use the extrusion mold to coat the high-temperature fluoroplastic FEP twisted wire insulation layer to form an insulated wire, and use two insulated wires to utilize the pair After stranding, the mixed condensed non-expandable filler is filled into the stranding gap, and then wrapped with aluminum foil by a longitudinal wrapping machine, and then wrapped on the outside of the aluminum foil by a braiding machine with magnesium-aluminum alloy or copper wire. Weave the shielding layer of the paired wires, and then fill the gap of the shielding layer of the paired wires with the mixed condensed non-expandable filler, and finally wrap the cloth tape around the shielding layer of the paired wires by a wrapping machine to make a paired wire ;

5) The optical unit, power line, coaxial line, twisted pair and filling rope are helically twisted through the cage stranding machine to form a cable core, and then the mixed condensed non-expanding filler is filled and twisted Then use non-woven fabric to form a wrapping tape outside the cable core through a wrapping machine. After wrapping, use an extrusion process through a plastic extruder to extrude the inner sheath with an extrusion die. The inner sheath is preferably made of polyurethane and nylon. made of other materials;

6) Use tinned copper wire or galvanized steel wire material to braid the shielding layer outside the inner sheath through the braiding machine, and fill the gap of the shielding layer with the mixed condensed non-expandable filling glue, and then use the non-woven fabric through the wrapping machine A wrapping tape is formed on the shielding layer, and finally the outer sheath is extruded by a plastic extruder using an extrusion process and an extrusion die. The outer sheath is preferably made of polyurethane, nylon and other materials.

The beneficial effects of the utility model are: 1. The composite cable has many types of transmission signals, large transmission capacity, and wide application scenarios, and the number of functional units in the cable core can be selected according to actual application requirements. 2. It is composed of multiple functional units, and the composite volume is small, which solves the problems of small installation space and difficulty in underwater equipment installation. 3. All the gaps of this product are equipped with water-blocking filling glue, and the cold filling method is adopted. After filling, it will not expand, cross-link at room temperature, not easy to soften, and has good cushioning performance. It can work for a long time in an environment up to 150 °C without It will have any impact on the photoelectric transmission performance of the product. It has full-section water-blocking and sealing capabilities, and can withstand horizontal and vertical 5MPa hydrostatic pressure. 4. The optical unit adopts a bundle structure composed of tight-sleeved optical fibers, which has the characteristics of high mechanical strength, simple production process, no electromagnetic interference, and stable transmission performance. 5. The power cord, twisted pair and coaxial cable all contain a shielding layer, and there is also a shielding layer outside the inner sheath, which has a strong anti-interference ability. 6. The optical unit sheath, inner sheath and outer sheath are all made of polyurethane materials with hydrolysis resistance and low temperature resistance, which can work stably for a long time at a minimum of -60°C. 7. The composite cable also has the characteristics of corrosion resistance, torsion resistance, tensile resistance, lateral pressure resistance, wear resistance, small size, strong functionality, low cost, and repeated use.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the structural representation of the light unit of the present utility model;

Fig. 3 is a structural schematic diagram of the power cord of the present utility model;

Fig. 4 is a structural schematic diagram of the utility model coaxial line;

Fig. 5 is a schematic structural view of the utility model twisted wire;

Among them: 1. Cable core, 11. Optical unit, 111. Strengthening member, 112. Tight-buffered optical fiber, 113. Wrapping layer, 114. Optical unit sheath, 12. Power cord, 121. Cloth tape, 122. Power cable shielding layer, 123, power cable insulating layer, 124, copper stranded wire, 13, coaxial cable, 131, copper wire, 132, coaxial cable insulating layer, 133, aluminum foil, 134, coaxial cable shielding layer, 135 , Coaxial cable sheath, 14, paired wire, 141, copper conductor, 142, aluminum foil, 143, paired wire shielding layer, 144, cloth wrapping tape, 145, paired wire insulation layer, 15, filling rope, 2. Inner sheath, 3. Shielding layer, 4. Outer sheath, 5. Wrapping tape, 6. Filler.

Detailed ways

In order to deepen the understanding of the utility model, the utility model will be further described below in conjunction with the embodiments and accompanying drawings. The embodiment is only used to explain the utility model, and does not constitute a limitation to the protection scope of the utility model.

As shown in Figure 1, the full-section water-blocking and sealed multi-signal composite cable includes a cable core 1, an inner sheath 2, a shielding layer 3 and an outer sheath 4. A polyurethane inner sheath 2 with a thickness of 1.5mm and a polyurethane outer sheath 4 with a thickness of 2mm are extruded. Between the outer sheath 4 and the inner sheath 2 is a shielding layer 3 braided by galvanized steel wires with a diameter of 0.3mm. There is also a wrapping tape 5 between the layer 3 and the outer sheath 4. The cable core 1 is composed of a six-core optical unit 11, two power lines 12, two coaxial lines 13, two twisted wires 14, and a diameter of 1.5 The filling rope 15 of mm is helically twisted. The diameters of the optical unit 11, the power line 12, the coaxial line 13, and the twisted pair 14 are all 4 mm. Fully condensing non-intumescent filler6.

As shown in Figure 2, the optical unit 11 includes a strengthening member 111, at least one tight-buffered optical fiber 112, a wrapping layer 113 and an optical unit sheath 114. There is a wrapping layer 113 made of polyester tape or water-blocking tape, and an optical unit sheath 114 made of polyurethane material is extruded around the wrapping layer 113, between the tight-buffered optical fiber 112, the strength member 111 and the wrapping layer 113 The gaps in the space are filled with filling glue 6. Among them, the tight-buffered optical fiber 112 is composed of a multi-mode optical fiber and a tight-buffered layer extruded outside the multi-mode optical fiber. The tight-buffered layer is made of nylon, polyurethane elastomer or low-smoke halogen-free flame-retardant material, and the reinforcing member 111 is fiber-reinforced. The plastic rod or water-blocking aramid fiber is covered, and the filling glue 6 is a room-temperature cross-linked water-blocking glue.

As shown in Figure 3, the power cord 12 includes a cloth tape 121, a power cord shielding layer 122, a power cord insulation layer 123 and a copper strand 124, and the copper strand 124 is made of at least seven silver-plated copper wires or nickel-plated copper wires. Twisted, the copper stranded wire 124 is covered with a power line insulation layer 123 made of FEP, PTFE, polyethylene, cross-linked polyethylene or silicone rubber material, and the power line insulation layer 123 is made of galvanized or galvanized steel with a diameter of 0.1mm The power cord shielding layer 122 braided by tinned copper wires is a cloth tape 121 with a thickness of 0.1 mm outside the power cord shielding layer 122 , and the gaps in the power cord shielding layer 122 are filled with filler glue 6 .

As shown in Figure 4, the coaxial cable 13 includes a single copper wire 131, a coaxial cable insulation layer 132, an aluminum foil 133, a coaxial cable shielding layer 134 and a coaxial cable sheath 135, and the copper wire 131 is a single silver-plated copper wire. conductor or nickel-plated copper conductor, the copper wire 131 is covered with a coaxial insulating layer 132 made of fluoroplastic FEP or cross-linked polyethylene insulating material, the coaxial insulating layer 132 is covered with an aluminum foil 133, and the aluminum foil 133 is The coaxial shielding layer 134 is braided by magnesium-aluminum alloy wire or copper wire material with a diameter of 0.1 mm. The coaxial shielding layer 134 is extruded with a coaxial sheath 135 made of cross-linked polyethylene insulating material. The coaxial The voids of the wire shielding layer 134 are filled with filling glue 6 .

As shown in Figure 5, the twisted pair 14 includes two twisted insulated wires, an aluminum foil 142, a twisted wire shield 143 and a cloth wrapping tape 144, and the insulated wire is wrapped by a silver-plated copper conductor or a tinned copper conductor 141 Composed of fluorine-coated plastic FEP or cross-linked polyethylene insulating material for twisted wire insulation layer 145, two insulated wires are twisted and covered with aluminum foil 142, and the outside of aluminum foil 142 is twisted pair braided by magnesium-aluminum alloy wire or copper wire material Wire shielding layer 143, twisted wire shielding layer 143 is cloth tape 144 with a thickness of 0.1 mm, and the gap between the insulated wire and aluminum foil 142 and the gap between twisted wire shielding layer 143 are filled with filling glue 6 .

The power line, coaxial line, twisted wire and outer sheath of the composite cable all contain a braided shielding layer, and are sheathed with chemical materials that are resistant to hydrolysis and wear, and the gaps between each unit are filled with water-blocking fillers. Rubber, with the ability to withstand high-pressure water seepage across the entire cross-section. In underwater applications, it can provide not only the optical fiber for optical signal transmission, but also the power line for control signal transmission, the coaxial line for radio frequency signals and the twisted pair wire for communication signals, and the product is small in size, diverse in function and stable in transmission.

The preparation process of the above-mentioned full-section water-blocking and sealing multi-signal composite cable includes the following steps:

(1) Use multi-mode optical fiber to extrude nylon material into the 30-type sheath line as the tight sleeve layer, and then perform helical twisting on 6 tight-sleeve optical fibers outside the strength member on the 65-type sheath line with twisted cage, and use The automatic continuous glue filling process fills the condensed non-expanding filling glue formed by filling the gap after stranding, and then wraps the polyester tape through the wrapping machine to form a wrapping layer, and finally uses the extrusion process through the plastic extruder. The compression mold extrudes the polyurethane light unit sheath outside the wrapping layer to make the light unit;

(2) A plurality of silver-plated copper wires or nickel-plated copper wires are twisted into copper strands by a cage stranding machine, and extruded by a plastic extruder using an extrusion process to extrude a high-temperature fluoroplastic FEP outside the copper strands. The power cord insulation layer, and then use the 0.1mm diameter galvanized or tinned copper wire to weave the power cord shielding layer outside the power cord insulation layer through the braiding machine, and then use the automatic continuous glue filling process to fill the mixed condensation non-expansion type Glue fills the gap of the shielding layer of the power cord, and finally wraps a cloth tape with a thickness of 0.1mm outside the shielding layer of the power cord by a wrapping machine to make a power cord;

3) A single silver-plated copper conductor or nickel-plated copper conductor is used as a copper wire, and a high-temperature fluoroplastic FEP coaxial insulation layer is extruded outside the copper wire by using an extrusion process through a high-temperature plastic extruder. , wrap aluminum foil on the outside of the coaxial cable insulating layer through a longitudinal wrapping machine, and then use a braiding machine to braid the coaxial cable shielding layer outside the aluminum foil with magnesium-aluminum alloy or copper wire material with a diameter of 0.1mm, and then use the automatic continuous glue filling process to seal the mixed The resulting condensed non-expandable filler fills the gap of the coaxial shielding layer, and finally extrudes a cross-linked polyethylene coaxial sheath outside the coaxial shielding layer through an extrusion die on the 50-type sheath line to make a coaxial sheath. axis;

4) Pass a single silver-plated copper conductor or tin-plated copper conductor through a plastic extruder using the extrusion process, and use an extrusion mold to coat the high-temperature fluoroplastic FEP twisted wire insulation layer to form an insulated wire, and use two insulated wires The stranding process is carried out. After stranding, the mixed condensed non-expandable filler is filled with the stranding gap by the automatic continuous glue filling process, and then wrapped with aluminum foil through the longitudinal wrapping machine, and then covered with magnesium aluminum alloy through the braiding machine. Or tinned copper wire material is braided on the shielding layer of the twisted wires outside the aluminum foil, and then the mixed condensed non-expandable filling glue is filled into the gaps of the shielding layer of the twisted wires by using the automatic continuous glue filling process, and finally the twisted wires are twisted through the winding machine. The wire shielding layer is wrapped with a 0.1mm thick cloth tape to make a pair of twisted wires;

5) The 6-core optical unit, 2 power lines, 2 coaxial lines, 2 twisted wires and 1.5mm-diameter filling ropes are put into 65-type sheathed wires, and twisted by cage stranding machine Combined to form a cable core, and use the automatic continuous glue filling process to fill the stranded gap with the mixed condensed non-expandable filler glue, and then use non-woven fabric or water-blocking tape material to form a wrapping tape outside the cable core through a wrapping machine After wrapping, the plastic extruder uses the extrusion process to extrude the inner sheath with an extrusion die. The inner sheath is preferably made of polyurethane, nylon and other materials;

6) Use 0.3mm tinned copper wire or galvanized steel wire material to weave the shielding layer outside the inner sheath through the braiding machine, and use the automatic continuous glue filling process to fill the gap of the shielding layer with the mixed condensed non-expanding filler , and then use non-woven fabric or water blocking tape material to form a wrapping tape on the shielding layer through a wrapping machine, and finally use an extrusion process through a plastic extruder to extrude the outer sheath with an extrusion die. The outer sheath is preferably made of polyurethane, Nylon and other materials.

The utility model is by no means limited to the above-mentioned embodiments. The concept and basic composition of the utility model include four basic units of an optical unit, a power line, a coaxial cable, and a pair of twisted wires, as well as an inner sheath, a shielding layer, and an outer sheath, including The arrangement and composition of the above four units all belong to the protection scope of the utility model.

Claims (9)

1. The sealing multi signal composite rope 1. total cross-section blocks water, which is characterized in that including cable core, sheath, shielded layer and outer jacket, institute It states cable core and is externally provided with twining package tape, extrude sheath and outer jacket outside the twining package tape, woven between the outer jacket and sheath Have shielded layer, also be provided with twining package tape between the shielded layer and outer jacket, the cable core be by light unit, power cord, coaxial line, Twisted pair wire, gasket for packing spiral are twisted, and fill in the twisted gap of cable core and filling glue in the gap of shielded layer.
2. The sealing multi signal composite rope 2. total cross-section according to claim 1 blocks water, which is characterized in that the light unit includes Reinforcer, tight tube fiber, lapping layer and light unit sheath, the reinforcer external spiral have been twisted tight tube fiber, the fixed light Fibre is externally provided with lapping layer, light unit sheath is extruded outside the lapping layer, between the tight tube fiber and reinforcer and lapping layer Gap fills filling glue.
3. 3. total cross-section according to claim 2 block water sealing multi signal composite rope, which is characterized in that the tight tube fiber by Multimode fibre and the tight sleeve layer extruded outside multimode fibre are formed, and the tight sleeve layer is using nylon, polyurethane elastomer or low Cigarette bittern-free flame-proof material is made, and the reinforcer is fiber reinforcement plastic sleeve bar or water resistance aramid fiber, and the lapping layer is polyester belt Or waterstop, the light unit sheath are made of polyurethane material.
4. The sealing multi signal composite rope 4. total cross-section according to claim 1 blocks water, which is characterized in that the power cord includes Fabric band, power cord shielded layer, power supply line insulating layer and copper stranded conductor, the copper stranded conductor is by least 7 silver-gilt copper wires or plating Nickel-copper wire is twisted, copper stranded conductor outer cladding power supply line insulating layer, is by zinc-plated or tinned copper wire volume outside the power supply line insulating layer The power cord shielded layer knitted, the power cord shielded layer are outside fabric band, and filling glue is filled in the gap of power cord shielded layer.
5. The sealing multi signal composite rope 5. total cross-section according to claim 4 blocks water, which is characterized in that the power cord insulation Layer is made of FEP, PTFE, polyethylene, crosslinked polyethylene or silastic material, and the fabric band is the cloth of 0.1mm thickness Band, the power cord shielded layer are woven by the zinc-plated or tinned copper wire of diameter 0.1mm.
6. The sealing multi signal composite rope 6. total cross-section according to claim 1 blocks water, which is characterized in that the coaxial line includes Copper conductor, coaxial line insulating layer, aluminium foil, coaxial line shielded layer and coaxial line sheath, the copper conductor are single silver-plated copper conductors Or nickel plated copper conductor, the coaxial line insulating layer of copper conductor outer cladding, the coaxial line insulating layer outer cladding aluminium foil, outside the aluminium foil It is the coaxial line shielded layer by Magnesium-aluminum alloy wire or copper wire material used braiding, coaxial line shield is extruded outside the coaxial line shielded layer Layer, fill filling glue in the gap of coaxial line shielded layer.
7. The sealing multi signal composite rope 7. total cross-section according to claim 6 blocks water, which is characterized in that the coaxial line insulation Layer is made of fluoroplastics FEP or crosslinked polyethylene insulation material, and the coaxial line sheath is by crosslinked polyethylene insulation material system It by the Magnesium-aluminum alloy wire of diameter 0.1mm or copper wire material used is woven into, the coaxial line shielded layer.
8. The sealing multi signal composite rope 8. total cross-section according to claim 1 blocks water, which is characterized in that the twisted pair wire includes Two twisted insulated conductors, aluminium foil, twisted pair wire shielded layer and fabric band, the insulated conductor is by silver-plated copper conductor or plating Tin copper conductor outer cladding pair twist line insulating layer forms, and is coated after two eradication edge wire strandings with aluminium foil, is by magnesium outside the aluminium foil Aluminum-alloy wire or the twisted pair wire shielded layer of copper wire material used braiding, the twisted pair wire shielded layer are outside fabric band, insulated conductor With filling filling glue in the gap of aluminium foil and in the gap of twisted pair wire shielded layer.
9. The sealing multi signal composite rope 9. total cross-section according to claim 8 blocks water, which is characterized in that the twisted pair wire insulation Layer is made of fluoroplastics FEP or crosslinked polyethylene insulation material, and the fabric band is the strap of 0.1mm thickness.