Transverse and longitudinal watertight composite cable and production process thereof

Abstract

The transverse and longitudinal watertight composite cable is characterized in that a power conductor and a power insulating layer are sequentially arranged on a power wire core from inside to outside in the radial direction of the power wire core. The signal wire core comprises two signal main wire cores, a leakage wire and a signal wire shielding layer. Each signal main wire core comprises a signal conductor and a signal insulating layer. The four power line cores and the two signal line cores are twisted to form a cable, water-blocking glue is poured after twisting to fill gaps between the four power line cores and the two signal line cores to form a filling layer, and then a water-blocking tape is lapped to form a first water-blocking layer. The first water-blocking layer is coated with water-blocking glue and then is woven by tinned copper wires to form a shielding layer. And a water-blocking tape is wrapped outside the shielding layer to form a second water-blocking layer. And the second waterproof layer is coated with glue and then extruded with polyether polyurethane to form an inner sheath. And the armor layer is arranged outside the inner sheath. And a water-blocking tape is wrapped outside the armor layer to form a third water-blocking layer. And the third waterproof layer is coated with glue and then extruded with polyether polyurethane to form an outer sheath.

Description

Technical Field

[0001] The invention relates to the technical field of power cables, in particular to a transverse and longitudinal watertight composite cable in a shipboard cable and a production process thereof. Background Art

[0002] In recent years, with the depletion of fossil energy and the increasing demand for electricity, the world is vigorously developing new energy industries, and countries are competing to develop new energy in the marine field, such as offshore wind turbine power generation, marine tidal energy, marine natural gas and oil extraction, etc. There is only one channel for offshore new energy to be used on land, that is, submarine cables. Submarine cables are key infrastructure for global communications and energy transmission. They are laid in the deep sea and provide reliable guarantees for global power supply and information exchange. In recent years, with the development of power transmission and transformation technologies at home and abroad, driven by economic integration, optimal energy allocation, and reduced environmental impact, cross-sea power transmission technology, submarine cable manufacturing technology, and submarine cable engineering technology have continued to move forward. However, the working environment of submarine cables is complex and changeable. Submarine cables need to work in harsh environments such as water depth of thousands of meters, large temperature changes, strong seawater corrosion, high salinity, etc., and they must also withstand huge underwater pressure, which puts high demands on the materials and manufacturing processes of the cables, especially the watertightness of the cables. The usual water-blocking methods of submarine cables are divided into transverse water-blocking and longitudinal water-blocking. The so-called transverse water-blocking is generally achieved by metal waterproof layer lead sheath and polyethylene sheath, and longitudinal water-blocking is achieved by filling water-blocking material in the single-filament gap when the conductor is twisted and wrapping water-blocking tape around the insulating core. Chinese patent document CN 205508454U discloses a single-core submarine cable, including a water-blocking conductor formed by twisting multiple conductor single wires, the gaps in the water-blocking conductor are filled with conductive water-blocking glue, the water-blocking conductor is provided with a conductor shielding layer, an insulating layer, an insulating shielding layer, a semi-conductive water-blocking tape, a semi-conductive water-blocking cushion layer, an alloy lead sheath, a sheath layer and an armor layer from the inside to the outside, a metal shielding layer is nested between the semi-conductive water-blocking tape and the semi-conductive water-blocking cushion layer, and the inner and outer surfaces of the armor layer are respectively wrapped with polypropylene fiber layers. This structure is a single-core cable, with low longitudinal water-blocking performance and relatively simple functions. Chinese patent document CN 216287703U discloses a longitudinal watertight cable, comprising a plurality of coaxially dispersed watertight core wires and a wrapping tape 4 wrapped around the periphery of all watertight core wires, the watertight core wire comprising a conductor core 1, an insulating layer 2 and a sub-shielding layer 3, the conductor core 1 is coated with an insulating layer 2, the insulating layer 2 is coated with a sub-shielding layer 3, a plurality of armored tubes 6 are arranged in the gap between the watertight core wire and the wrapping tape 4, the gap between the wrapping tape 4, the armored tube 6 and the watertight core wire is filled with sealant, and the wrapping tape 4 is wrapped with a sheath 5. The conductor core 1 is formed by braiding and twisting a plurality of conductor wires and a plurality of fibers. The insulating layer 2 is a low-smoke, halogen-free, flame-retardant polyolefin outer sheath or a cross-linked polyethylene layer. The sub-shielding layer 3 is an aluminum foil or copper wire braided shielding layer. The wrapping tape 4 is a polyvinyl chloride layer. The sheath 5 is a polyurethane layer or a fluoroplastic layer. The armored tube 6 is made of high-strength fiber, Kevlar fiber layer or a mixture of high-strength fiber and Kevlar fiber, arranged in an overlapping manner or in a twisted spiral arrangement. The transverse water blocking ability of the cable is relatively poor. Summary of the invention

[0003] The object of the present invention is to provide a transverse and longitudinal watertight composite cable with a simple structure and good watertight effect and a production process thereof.

[0004] The basic technical scheme for achieving the purpose of the present invention is: a transverse and longitudinal watertight composite cable, which has the following structural features: including a power line core, a signal line core, a filling layer, a first water-blocking layer, a shielding layer, a second water-blocking layer, an inner sheath, an armor layer, a third water-blocking layer and an outer sheath. The power line core is provided with a power conductor and a power insulation layer in sequence from the inside to the outside along its radial direction. The signal line core includes two signal main line cores, a leakage line and a signal line shielding layer. The signal main line core includes a signal conductor and a signal insulation layer. Four power line cores and two signal line cores are twisted into a cable, and the twisting pitch ratio is 10 to 12. After twisting, water-blocking glue is poured to fill the gaps between the four power line cores and the two signal line cores. After filling, the water-blocking glue forms a filling layer, and then the first water-blocking layer is formed by wrapping a water-blocking tape, and the wrapping coverage rate is 15% to 20%. After the first water-blocking layer is coated with water-blocking glue, tinned copper wire is used to weave to form a shielding layer, and the weaving coverage rate is not less than 90%. The shielding layer is wrapped with a water-blocking tape to form a second water-blocking layer. The second water-blocking layer is coated with glue and then extruded with polyether polyurethane to form an inner sheath. The armor layer is arranged outside the inner sheath. The armor layer is wrapped with water-blocking tape to form a third water-blocking layer, and the wrapping overlap rate is 20% to 25%. The third water-blocking layer is coated with glue and then extruded with polyether polyurethane to form an outer sheath.

[0005] Furthermore, in order to improve the tensile strength of the cable: an armor layer is formed by mixing aramid wire and galvanized steel wire and the braiding coverage rate is not less than 90%.

[0006] Furthermore, in order to improve the tensile strength of the cable: the ratio of the aramid wire and the galvanized steel wire in the armor layer is 1:1, the upper spindle of the braiding machine is 4 / 1500D twisted aramid wire, and the lower spindle is galvanized steel wire.

[0007] Furthermore, in order to improve the longitudinal watertightness: the power conductor is formed by twisting a plurality of hot-dip tinned copper wire conductors and aramid wires, and the proportion of the aramid wire is 12.5% ​​to 16.7%.

[0008] Furthermore, in order to improve the longitudinal watertightness: the signal conductor is formed by twisting a plurality of hot-dip tinned copper wire conductors and aramid wires, and the proportion of the aramid wire is 12.5% ​​to 16.7%.

[0009] Furthermore, in order to improve the reliability of use: two signal main line cores are twisted into a cable to form a cable core of the signal line core. The cable core and the leakage line are directly dragged and then wrapped with aluminum-plastic tape to form a signal line shielding layer. The aluminum surface of the aluminum-plastic tape faces inward and contacts the leakage line, and the wrapping overlap rate is 25% to 30%.

[0010] A production process for a transverse and longitudinal watertight composite cable, characterized in that it comprises the following steps: 1. Processing power line cores; 2. Processing signal line core; 3. 4 power line cores and 2 signal line cores are twisted into a cable with a twisting pitch ratio of 10 to 12. After twisting, water-blocking glue is poured to form a corresponding filling layer. Water-blocking tape is wrapped outside the filling layer to form the first water-blocking layer, and the wrapping coverage rate is 15% to 20%; 4. After the first water-blocking layer is coated with water-blocking glue, tinned copper wire is used to weave to form a shielding layer, and the weaving coverage rate is not less than 90%; 5. The shielding layer is wrapped with water-blocking tape to form a second water-blocking layer, with an overlap rate of 15% to 20%; 6. After the second water-blocking layer is coated with water-blocking glue, polyether polyurethane is extruded to form an inner sheath, and the concentricity of the inner sheath extrusion process does not exceed 1.1; 7. The outer part of the inner sheath is made of aramid wire and galvanized steel wire mixed and woven to form an armor layer, with a weaving coverage rate of not less than 90%, and the ratio of aramid wire to galvanized steel wire is 1:1; 8. The armor layer is wrapped with water-blocking tape to form the third water-blocking layer, with a wrapping coverage rate of 20% to 25%; 9. After the third water-blocking layer is coated with glue, polyether polyurethane is extruded to form an outer sheath, and the concentricity of the outer sheath extrusion process does not exceed 1.1.

[0011] Furthermore, step one includes the following steps: 1.1 A number of hot-dip tinned copper wire conductors and aramid yarns are twisted together to form a power conductor. The proportion of aramid yarn is 12.5% ​​to 16.7%. The specification of aramid yarn is 1500D. Four strands are twisted first, and then added in units of 4 / 1500D when the conductor single wires are twisted. The pitch diameter ratio during twisting is 11 to 12 for the bundle wire, 5 to 6 times for the inner layer of the double twist, 7 to 8 times for the outer layer, and so on. The conductor bundle wire and the outermost layer of the double twist are left-handed; 1.2 Fill the power conductor with water-blocking glue; 1.3 After the power conductor is filled with glue, EPDM rubber is extruded to form a power insulation layer. The concentricity of the insulation layer extrusion process shall not exceed 1.1.

[0012] Furthermore, step 2 includes the following steps: 2.1 A number of hot-dip tinned copper wire conductors and aramid yarns are twisted together to form a signal conductor. The proportion of aramid yarn is 12.5% ​​to 16.7%. The specification of aramid yarn is 1500D. Four strands are twisted first, and then added in units of 4 / 1500D when the conductor single wires are twisted. The pitch diameter ratio during twisting is 11 to 12 for the bundle wire, 5 to 6 times for the inner layer of the double twist, 7 to 8 times for the outer layer, and so on. The conductor bundle wire and the outermost layer of the double twist are left-handed; 2.2 Fill the signal conductor with water-blocking glue; 2.3 The signal conductor is extruded with EPDM rubber to form a signal insulation layer, and the concentricity of the insulation layer extrusion process shall not exceed 1.1; 2.4 To make the cable core of the signal line core, twist two signal main line cores 2-1 into a cable to form the cable core of the signal line core. The cable core and the leakage line are directly dragged and then wrapped with aluminum-plastic tape to form a signal line shielding layer. The aluminum surface of the aluminum-plastic tape faces inwards and contacts the leakage line. The wrapping overlap rate is 25% to 30%.

[0013] The present invention has the following beneficial effects: (1) The transverse and longitudinal watertight composite cable of the present invention has a structural design of a water-blocking conductor, and the twisting pitch increases from the inside to the outside, so that the conductor twisting can be more compact; the concentricity requirement of the non-metallic base layer does not exceed 1.1, and the higher concentricity can balance the water pressure from all directions, effectively avoiding the deformation of the cable caused by uneven pressure, so that the submarine cable can be completely water-blocking and pressure-resistant at a water depth of 1500 meters, and can withstand a lateral water pressure of 22.5MPa, meeting the use requirements of offshore submarine cables. The single-component polyurethane sealant used in the present invention has a dual sealing and waterproofing mechanism of elastic waterproofing of rubber and volume expansion waterproofing after encountering water, strong durability and low quality change rate; it has excellent elasticity and resilience, and can be used for dynamic joints; it has good low-temperature flexibility, and can still maintain good flexibility in a low-temperature environment, and the maximum water pressure resistance can reach more than 30.5MPa. Both the inner sheath and the outer sheath are made of polyether polyurethane, which can improve the lateral water-blocking ability of the cable. The conductor is reinforced with aramid and the armor layer is a mixed braid of galvanized steel wire and aramid, so that its normal working tension can reach more than 3000N.

[0014] (2) The transverse and longitudinal watertight composite cable of the present invention has been tested and found that: after the cable is subjected to a maximum water pressure of 22.5 MPa for 6 hours, the volume of water leaked from the free end of the sample should comply with the requirements of Table 4 of GJB1916A-2022; Any component that is subjected to water pressure should not have any visible damage, and the insulation resistance and conductor resistance at 20°C should be ≥3670MΩ·km and ≤8.38Ω / km (2.5mm 2 );≤4.89Ω / km(4mm 2 );≤3.39Ω / km(6mm 2) requirements (requirements in Table 5 and Table 2 of GJB774A-2020); 2. The salt spray resistance of the cable meets the requirements of GJB150.11A-2009. The salt deposition produced by the test may affect the mechanical parts or components, but does not cause blockage or adhesion that affects the normal function. The physical properties are qualified; in 24 After the 1-hour drying stage, the residual moisture did not cause the test piece to have electrical performance failure, or although there was a failure, it was not related to the failure in actual use, and the electrical characteristics were judged to be qualified; from the perspective of short-term and potential long-term effects, the corrosion did not affect the normal function and structural integrity of the test piece, that is, there was no obvious damage or deformation caused by corrosion, and the corrosion characteristics were judged to be qualified; 3. After immersion in a constant temperature water tank at 0±2℃ / 14 days, the water absorption rate is required to be ≤5mg / cm²; 4. Using the second group of fungi in GJB150.10A-2009 (Aspergillus flavus, Aspergillus versicolor, Penicillium funiculum, Chaetomium globosum, Aspergillus niger), the temperature is 30℃ and the relative humidity is 95%, the time is 28 days, the mold growth level of the sample is not worse than level 1, and the degree of mold growth is mild, trace or no. 5. The cable is in a -40℃ environment, and the cable bending surface does not crack for 20 hours. The -40℃ tensile test of the material meets the requirements of IEC60092-360-2021, and the elongation at break of the material is ≥30%. 6. The seawater corrosion resistance of the cable meets the requirements of the JY-24-007 inspection specification: Take a section of finished cable for testing, place it in the laboratory seawater substitute, with both ends of the cable exposed to the water surface, maintain the water temperature at 40±2℃, and soak for 40 days. After the soaking is completed, the sample is placed at room temperature (25±5℃) for 4h, and then the insulation resistance test of the outer sheath is carried out (not less than 1000MΩ•km). The composition of the laboratory seawater substitute is as follows: Chemical composition table of seawater substitutes Compound Concentration g / L NaCl 24.53 <![CDATA[MgCl2]]> 5.20 <![CDATA[Na2SO4]]> 4.09 <![CDATA[CaCl2]]> 1.16 KCl 0.695 <![CDATA[NaHCO2]]> 0.201 KBr 0.101 <![CDATA[H3BO3]]> 0.027 <![CDATA[SrCl2]]> 0.025 NaF 0.003 BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic structural diagram of the transverse and longitudinal watertight composite cable of the present invention.

[0016] The reference numerals in the accompanying drawings are: Power line core 1, power conductor 1-1, power insulation layer 1-2, Signal line core 2, signal main line core 2-1, signal conductor 2-11, signal insulation layer 2-12, leakage line 2-2, signal line shielding layer 2-3, Filling layer 3, The first water-blocking layer 4, Shielding layer 5, The second water-blocking layer 6, Inner sheath 7, Armor layer 8, The third water-blocking layer 9, Outer sheath 10. DETAILED DESCRIPTION

[0017] In order to make the content of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments and in conjunction with the accompanying drawings. Figure 1 The direction shown is carried out, that is, Figure 1 The up, down, left, and right directions shown are the up, down, left, and right directions described. Figure 1 The direction is forward, away from Figure 1 It should be understood that the terms "upper", "lower", "inner", "outer" and the like indicating directions or positional relationships are based on the positional relationships described in the drawings and are only for the convenience of describing the present invention or simplifying the description, rather than indicating a specific direction that must be possessed.

[0018] (Example 1) See Figure 1 The transverse and longitudinal watertight composite cable of the present invention comprises a power line core 1, a signal line core 2, a filling layer 3, a first water-blocking layer 4, a shielding layer 5, a second water-blocking layer 6, an inner sheath 7, an armor layer 8, a third water-blocking layer 9 and an outer sheath 10.

[0019] See Figure 1 There are four power line cores 1, and the four power line cores 1 have the same structure. A power conductor 1-1 and a power insulation layer 1-2 are sequentially provided along their respective radial directions from inside to outside.

[0020] The power conductor 1-1 is formed by twisting a number of hot-dip tinned copper wire conductors and aramid yarns, with the proportion of aramid yarns being 12.5% ​​to 16.7%. The aramid yarn specification of this embodiment is 1500D, and 4 strands are twisted first, and then added in units of 4 / 1500D when the conductor monofilaments are twisted, and 1 strand of 4 / 1500D aramid is added to 6 monofilaments. After twisting, water-blocking glue is poured, and the water-blocking glue of this embodiment adopts Shandong Norrick Spring fr-130 single-component polyurethane sealant. The power conductor 1-1 is extruded with EPDM rubber to form a power insulation layer 1-2.

[0021] There are two signal line cores 2, and the two signal line cores 2 have the same structure, and both include two signal main line cores 2-1, a leakage line 2-2 and a signal line shielding layer 2-3. The signal main line core 2-1 includes a signal conductor 2-11 and a signal insulation layer 2-12.

[0022] The signal conductor 2-11 is formed by twisting a number of hot-dip tinned copper wire conductors and aramid yarns, with the proportion of aramid yarns being 12.5% ​​to 16.7%. The aramid yarn specification of this embodiment is 1500D. Four strands are twisted first, and then added in units of 4 / 1500D when the conductor monofilaments are twisted. One strand of 4 / 1500D aramid is added to six monofilaments, and water-blocking glue is poured after twisting. The water-blocking glue of this embodiment uses Shandong Norrick Spring fr-130 single-component polyurethane sealant. The signal conductor 2-11 is extruded with EPDM rubber to form a signal insulation layer 2-12. Two signal main cores 2-1 are twisted into a cable to form the cable core of the signal core 2. The cable core and the leakage line 2-2 are directly dragged and then wrapped with aluminum-plastic tape to form a signal line shielding layer 2-3. The aluminum surface of the aluminum-plastic tape faces inward and contacts the leakage line 2-2. The wrapping overlap rate is 25% to 30%, and is 27% in this embodiment.

[0023] Four power line cores 1 and two signal line cores 2 are twisted into a cable, and the twisting pitch ratio is 10 to 12. After twisting, water-blocking glue is poured to fill the gaps between the four power line cores 1 and the two signal line cores 2. After filling, the water-blocking glue forms a filling layer 3, and then the first water-blocking layer 4 is formed by wrapping with a water-blocking tape, and the wrapping coverage rate is 15% to 20%, and 17% in this embodiment. After the first water-blocking layer 4 is coated with water-blocking glue, tinned copper wire is used to weave to form a shielding layer 5, and the weaving coverage rate is not less than 90%. The shielding layer 5 is wrapped with a water-blocking tape to form a second water-blocking layer 6. After the second water-blocking layer 6 is coated with glue, polyether polyurethane is extruded to form an inner sheath 7. The inner sheath 7 is mixed with aramid wire and galvanized steel wire to form an armor layer 8, and the weaving coverage rate is not less than 90%. The upper spindle of the braiding machine is 4 / 1500D twisted aramid wire, and the lower spindle is galvanized steel wire. The ratio of aramid wire to galvanized steel wire is 1:1. The armor layer 8 is wrapped with a water-blocking tape to form a third water-blocking layer 9, with a wrapping coverage of 20% to 25%, and 22% in this embodiment. The third water-blocking layer 9 is coated with glue and then extruded with polyether polyurethane to form an outer sheath 10.

[0024] The production process of the transverse and longitudinal watertight composite cable of the present invention comprises the following steps: 1. Processing power line core 1 1.1 A plurality of hot-dip tinned copper wire conductors and aramid yarns are twisted together to form a power conductor 1-1. The proportion of aramid yarn is 12.5% ​​to 16.7%. The aramid yarn specification of this embodiment is 1500D. Four strands are twisted first, and then added in units of 4 / 1500D when the conductor monofilaments are twisted. One strand of 4 / 1500D aramid yarn is added to six conductor monofilaments. When one strand of 4 / 1500D twisted aramid yarn is added to every six conductor monofilaments, the pitch diameter ratio is 11 to 12 for the bundle, 5 to 6 times for the inner layer of the double twist, and 7 to 8 times for the outer layer, and so on. The conductor bundle and the outermost layer of the double twist are left-handed.

[0025] 1.2 Fill the power conductor 1-1 with water-blocking glue. The water-blocking glue is Shandong Norrick Spring fr-130 single-component polyurethane sealant. Turn on the glue filling machine (the glue filling machine is purchased from the market), set the pressure value to 0.2Mpa, and the temperature to 20~25℃. After the water-blocking glue reaches the temperature, turn on the glue injection switch. There is a glue injection port at the top of the twisting mold. The water-blocking glue is injected into the conductor being twisted by the glue filling machine at the set pressure.

[0026] 1.3 After the power conductor 1-1 is filled with glue, EPDM rubber is extruded to form the power insulation layer 1-2. The concentricity in the insulation layer extrusion process does not exceed 1.1. The algorithm for concentricity is to measure the thickness at 6 points on the same cross section. Concentricity = maximum thickness / minimum thickness.

[0027] 2. Processing signal core 2 2.1 A number of hot-dip tinned copper wire conductors and aramid yarns are twisted to form signal conductors 2-11. The proportion of aramid yarn is 12.5% ​​to 16.7%. The aramid yarn specification of this embodiment is 1500D. Four strands are twisted first, and then added in units of 4 / 1500D when the conductor monofilaments are twisted. One strand of 4 / 1500D aramid yarn is added to every 6 conductor monofilaments. One strand of 4 / 1500D twisted aramid yarn is added to every 6 conductor monofilaments. The pitch diameter ratio is 11 to 12 for the bundle, 5 to 6 times for the inner layer of the re-twisted, 7 to 8 times for the outer layer, and so on. The conductor bundle and the outermost layer of the re-twisted are left-handed.

[0028] 2.2 Fill the signal conductor 2-11 with water-blocking glue. The water-blocking glue uses Shandong Norrick Spring fr-130 single-component polyurethane sealant. Turn on the glue filling machine, set the pressure value to 0.2Mpa, and the temperature to 20~25℃. After the water-blocking glue reaches the temperature, turn on the glue injection switch. There is a glue injection port at the top of the twisting mold. The water-blocking glue is injected into the conductor being twisted by the glue filling machine at the set pressure.

[0029] 2.3 The signal conductor 2-11 is extruded with EPDM rubber to form a signal insulation layer 2-12. The concentricity in the insulation layer extrusion process does not exceed 1.1. The algorithm for concentricity is to measure the thickness at 6 points on the same cross section. Concentricity = maximum thickness / minimum thickness.

[0030] 2.4 To make the cable core of the signal line core 2, two signal main line cores 2-1 are twisted into a cable to form the cable core of the signal line core 2. The cable core and the leakage line 2-2 are directly dragged and then wrapped with an aluminum-plastic tape to form a signal line shielding layer 2-3. The aluminum surface of the aluminum-plastic tape faces inwards and contacts the leakage line 2-2. The wrapping overlap rate is 25% to 30%, and is 27% in this embodiment.

[0031] 3. Four power line cores 1 and two signal line cores 2 are twisted into a cable with a twisting pitch ratio of 10 to 12. After twisting, water-blocking glue is poured to form a corresponding filling layer 3. A water-blocking tape is wrapped around the filling layer 3 to form a first water-blocking layer 4 with a wrapping overlap rate of 15% to 20%.

[0032] 4. After the first water-blocking layer 4 is coated with water-blocking glue, tinned copper wire is used to weave to form a shielding layer 5, and the weaving coverage rate is not less than 90%.

[0033] 5. The shielding layer 5 is wrapped with a water-blocking tape to form a second water-blocking layer 6, with an overlap rate of 15% to 20%.

[0034] 6. The second water-blocking layer 6 is coated with water-blocking glue and then extruded with polyether polyurethane to form an inner sheath 7. The concentricity of the inner sheath extrusion process does not exceed 1.1. The algorithm for concentricity is to measure the thickness at 6 points on the same cross section. Concentricity = maximum thickness / minimum thickness.

[0035] 7. The outer part of the inner sheath 7 is braided with aramid wire and galvanized steel wire to form an armor layer 8, with a braiding coverage of not less than 90%. The upper spindle of the braiding machine is 4 / 1500D twisted aramid wire, and the lower spindle is galvanized steel wire. The ratio of aramid wire to galvanized steel wire is 1:1.

[0036] 8. The armor layer 8 is wrapped with a water-blocking tape to form a third water-blocking layer 9, with an overlap rate of 20% to 25%.

[0037] 9. The third water-blocking layer 9 is coated with glue and then extruded with polyether polyurethane to form an outer sheath 10. The concentricity of the outer sheath extrusion process does not exceed 1.1. The algorithm for concentricity is to measure the thickness at 6 points on the same cross section. Concentricity = maximum thickness / minimum thickness.

[0038] The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A transverse and longitudinal watertight composite cable, characterized in that: The invention comprises a power line core (1), a signal line core (2), a filling layer (3), a first water-blocking layer (4), a shielding layer (5), a second water-blocking layer (6), an inner sheath (7), an armor layer (8), a third water-blocking layer (9) and an outer sheath (10); the power line core (1) is provided with a power conductor (1-1) and a power insulation layer (1-2) in sequence from the inside to the outside along its radial direction; the signal line core (2) comprises two signal main line cores (2-1), a leakage line (2-2) and a signal line shielding layer (2-3); the signal main line core (2-1) comprises a signal conductor (2-11) and a signal insulation layer (2-12); four power line cores (1) and two signal line cores (2) are twisted into a cable, the twisting pitch ratio is 10 to 12, and after twisting, the four power line cores are filled with water-blocking glue to form a cable. The gap between the wire core (1) and the two signal wire cores (2) is filled with water-blocking glue to form a filling layer (3), and then wrapped with a water-blocking tape to form a first water-blocking layer (4), with a wrapping overlap rate of 15% to 20%; the first water-blocking layer (4) is coated with water-blocking glue and then woven with tinned copper wire to form a shielding layer (5), with a weaving coverage rate of not less than 90%; the shielding layer (5) is wrapped with a water-blocking tape to form a second water-blocking layer (6); the second water-blocking layer (6) is coated with glue and then extruded with polyether-type polyurethane to form an inner sheath (7); the armor layer (8) is arranged outside the inner sheath (7); the armor layer (8) is wrapped with a water-blocking tape to form a third water-blocking layer (9), with a wrapping overlap rate of 20% to 25%; the third water-blocking layer (9) is coated with glue and then extruded with polyether-type polyurethane to form an outer sheath (10).

2. The transverse and longitudinal watertight composite cable according to claim 1, characterized in that: The armor layer (8) is formed by mixing and weaving aramid wire and galvanized steel wire, and the weaving coverage rate is not less than 90%.

3. The transverse and longitudinal watertight composite cable according to claim 2, characterized in that: The ratio of the aramid yarn and the galvanized steel wire of the armor layer (8) is 1:1, the upper spindle of the braiding machine is 4 / 1500D twisted aramid yarn, and the lower spindle is galvanized steel wire.

4. The transverse and longitudinal watertight composite cable according to claim 1, characterized in that: The power conductor (1-1) is formed by twisting a plurality of hot-dip tinned copper wire conductors and aramid wires, wherein the proportion of the aramid wires is 12.5% ​​to 16.7%.

5. The transverse and longitudinal watertight composite cable according to claim 1, characterized in that: The signal conductor (2-11) is formed by twisting a plurality of hot-dip tinned copper wire conductors and aramid wires, with the proportion of aramid wire being 12.5% ​​to 16.7%.

6. The transverse and longitudinal watertight composite cable according to claim 1, characterized in that: Two signal main line cores (2-1) are twisted into a cable to form a cable core of a signal line core (2). The cable core and the leakage line (2-2) are directly dragged and then wrapped with an aluminum-plastic tape to form a signal line shielding layer (2-3). The aluminum surface of the aluminum-plastic tape faces inwards and contacts the leakage line (2-2). The wrapping overlap rate is 25% to 30%.

7. A production process for a transverse and longitudinal watertight composite cable, characterized in that: The following steps are included:

1. Processing power line core (1); 2. Processing the signal wire core (2); 3. Four power line cores (1) and two signal line cores (2) are twisted into a cable, with a twisting pitch ratio of 10 to 12. After twisting, water-blocking glue is poured to form a corresponding filling layer (3). A water-blocking tape is wrapped around the filling layer (3) to form a first water-blocking layer (4), with a wrapping overlap ratio of 15% to 20%; 4. The first water-blocking layer (4) is coated with water-blocking glue and then woven with tinned copper wire to form a shielding layer (5), with a weaving coverage of not less than 90%; 5. The shielding layer (5) is wrapped with a water-blocking tape to form a second water-blocking layer (6), with an overlap rate of 15% to 20%; 6. The second water-blocking layer (6) is coated with water-blocking glue and then extruded with polyether polyurethane to form an inner sheath (7), and the concentricity of the inner sheath extrusion process does not exceed 1.1; 7. The inner sheath (7) is formed of an armor layer (8) made of a mixed braid of aramid wire and galvanized steel wire, with a braiding coverage of not less than 90%, and a ratio of aramid wire to galvanized steel wire of 1:1; 8. The armor layer (8) is wrapped with a water-blocking tape to form a third water-blocking layer (9), with an overlap rate of 20% to 25%; 9. The third water-blocking layer (9) is coated with glue and then extruded with polyether polyurethane to form an outer sheath (10), and the concentricity during the outer sheath extrusion process does not exceed 1.

1.

8. The production process of the transverse and longitudinal watertight composite cable according to claim 1, characterized in that: Step 1 includes the following steps: 1.1 A number of hot-dip tinned copper wire conductors and aramid yarns are twisted together to form a power conductor (1-1). The proportion of aramid yarn is 12.5% ​​to 16.7%. The specification of aramid yarn is 1500D. Four strands are twisted first, and then added in units of 4 / 1500D when the conductor single wires are twisted. When twisting, the pitch diameter ratio of the bundle is 11 to 12, the inner layer of the double twist is 5 to 6 times, and the outer layer is 7 to 8 times, and so on. The conductor bundle and the outermost layer of the double twist are left-handed; 1.2 Fill the power conductor (1-1) with water-blocking glue; 1.3 After the power conductor (1-1) is filled with glue, EPDM rubber is extruded to form a power insulation layer (1-2). The concentricity of the insulation layer extrusion process shall not exceed 1.

1.

9. The production process of the transverse and longitudinal watertight composite cable according to claim 1, characterized in that: Step 2 includes the following steps: 2.1 A number of hot-dip tinned copper wire conductors and aramid yarns are twisted together to form a signal conductor (2-11). The proportion of aramid yarn is 12.5% ​​to 16.7%. The specification of aramid yarn is 1500D. Four strands are twisted first, and then added in units of 4 / 1500D when the conductor single wires are twisted. The pitch diameter ratio during twisting is 11 to 12 for the bundle wire, 5 to 6 times for the inner layer of the double twist, 7 to 8 times for the outer layer, and so on. The conductor bundle wire and the outermost layer of the double twist are left-handed; 2.2 Fill the signal conductor (2-11) with water-blocking glue; 2.3 The signal conductor (2-11) is extruded with EPDM rubber to form a signal insulation layer (2-12), and the concentricity of the insulation layer extrusion process does not exceed 1.1; 2.4 To make the cable core of the signal line core (2), two signal main line cores 2-1 are twisted into a cable to form the cable core of the signal line core (2). The cable core and the leakage line (2-2) are directly dragged and then wrapped with an aluminum-plastic tape to form a signal line shielding layer (2-3). The aluminum surface of the aluminum-plastic tape faces inwards and contacts the leakage line (2-2). The wrapping overlap rate is 25% to 30%.

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