CN112117032A - Flexible zero-buoyancy photoelectric composite trailing cable - Google Patents
Flexible zero-buoyancy photoelectric composite trailing cable Download PDFInfo
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- CN112117032A CN112117032A CN202010785060.4A CN202010785060A CN112117032A CN 112117032 A CN112117032 A CN 112117032A CN 202010785060 A CN202010785060 A CN 202010785060A CN 112117032 A CN112117032 A CN 112117032A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/04—Flexible cables, conductors, or cords, e.g. trailing cables
- H01B7/045—Flexible cables, conductors, or cords, e.g. trailing cables attached to marine objects, e.g. buoys, diving equipment, aquatic probes, marine towline
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/0045—Cable-harnesses
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
- H01B7/182—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring comprising synthetic filaments
- H01B7/183—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring comprising synthetic filaments forming part of an outer sheath
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
- H01B7/1875—Multi-layer sheaths
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B9/00—Power cables
- H01B9/005—Power cables including optical transmission elements
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- Engineering & Computer Science (AREA)
- Ocean & Marine Engineering (AREA)
- Communication Cables (AREA)
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Abstract
The invention discloses a flexible zero-buoyancy photoelectric composite trailing cable which comprises an optical unit arranged in the center, an inner sheath layer, an electric power unit, a middle sheath layer, a flexible reinforcing unit and an outer sheath layer, wherein the inner sheath layer, the electric power unit, the middle sheath layer, the flexible reinforcing unit and the outer sheath layer are sequentially coated outside the optical unit, the electric power unit is spirally twisted on the periphery of the inner sheath layer along the extending direction of the inner sheath layer by taking the inner sheath layer as an axis, the flexible reinforcing unit is non-metal yarns, the non-metal yarns are wound outside the middle sheath layer in a layered twisting mode, the densities of the materials of the inner sheath layer, the middle sheath layer and the outer sheath layer are smaller than that of water, and. The comprehensive structural design of the invention enables the density of the cable to be similar to that of seawater, can realize high-speed towing in full water depth, and can meet repeated retraction requirements while increasing the tensile strength of the whole cable by adopting the flexible reinforcing unit.
Description
Technical Field
The invention relates to the field of cable design and manufacture, in particular to a flexible zero-buoyancy photoelectric composite trailing cable.
Background
During underwater detection work such as marine scientific investigation, defense and the like, a naval vessel is required to transmit electric power and signals to underwater working equipment, and meanwhile, the underwater signals are transmitted back to the naval vessel through an optical fiber or an electric signal unit. High-speed towing equipment is needed in part detection work for patrolling sea areas, water resistance and equipment weight are considered, the cable is required to have enough tensile strength, meanwhile, the density of the cable is required to be approximate to that of sea water, the cable can stay in the depth of the whole water area, the towing cable is soft and wear-resistant, and equipment and instruments can be conveniently retracted to a deck of a ship after the towing cable works.
The static zero-buoyancy cable in the prior art adopts the foaming material as the buoyancy adjusting layer, and the compression strength and the tensile strength are low, so that the zero-buoyancy cable is difficult to apply to a towing environment.
Disclosure of Invention
The invention aims to solve the technical problem of providing a flexible zero-buoyancy photoelectric composite towing cable, which is designed in a comprehensive structure so that the density of the cable is similar to that of seawater, can realize high-speed towing in full water depth, and meets repeated retracting requirements while increasing the tensile strength of the whole cable by adopting a flexible reinforcing unit.
In order to solve the technical problems, the invention provides a flexible zero-buoyancy photoelectric composite trailing cable which comprises a light unit arranged in the center, and an inner sheath layer, an electric power unit, a middle sheath layer, a flexible reinforcing unit and an outer sheath layer which are sequentially coated outside the light unit, wherein the electric power unit is spirally twisted around the inner sheath layer along the extension direction of the inner sheath layer by taking the inner sheath layer as an axis, the flexible reinforcing unit is non-metal yarns, the non-metal yarns are wound outside the middle sheath layer in a layered twisting manner, the densities of the inner sheath layer, the middle sheath layer and the outer sheath layer are smaller than that of water, and the inner sheath layer, the middle sheath layer and the outer sheath layer are used for balancing the specific gravity of the photoelectric composite trailing cable, so that the overall density of the cable is similar to that of seawater.
In a preferred embodiment of the present invention, the calculation formula of the overall density of the photoelectric composite trailing cable further includes:
in a preferred embodiment of the invention, the overall mass M of the trailing cable is further includedCable with a flexible connectionThe calculation formula of (a) is as follows:
Mcable with a flexible connection＝∑(MX)＝∑(MPower unit+MLight unit+MFlexible reinforcement unit+MInner sheath layer+MMiddle sheath layer+MOuter sheath layer)，
Wherein M isX＝PX·VX，MXIs the mass of each unit, PXIs the density of each cell, VXIs the volume of each unit.
In a preferred embodiment of the present invention, the overall volume V of the photovoltaic composite trailing cable is further includedCable with a flexible connectionThe calculation formula of (a) is as follows:
wherein D isCable with a flexible connection＝∑(TX)＝∑(TPower unit+TLight unit+TFlexible reinforcement unit+TInner sheath layer+TMiddle sheath layer+TOuter sheath layer)，TXThe thickness of each unit or the outer diameter of each unit to the cable is increased.
In a preferred embodiment of the invention, the density of the inner sheath layer, the middle sheath layer and the outer sheath layer is 0.89-0.95 g/cm3。
In a preferred embodiment of the present invention, the optical unit further comprises a plurality of loose tubes, the loose tubes are symmetrically arranged with the cable center as an axis, and a plurality of optical fibers and filling ointment are arranged in the loose tubes.
In a preferred embodiment of the invention, the inner sheath layer is further provided with a filling unit according to requirements, and the filling unit is a heat-resistant filling rope.
In a preferred embodiment of the present invention, the power unit further includes a conductor and an insulating layer covering the conductor, and the power unit is symmetrically disposed around the inner sheath layer with the inner sheath layer as an axis.
In a preferred embodiment of the present invention, the non-metal yarns are layered and twisted outside the middle sheath layer, and the twisting pitch ratio of two adjacent layers of non-metal yarns is the same and the twisting directions are opposite.
In a preferred embodiment of the present invention, the non-metallic yarns further have a density of not more than 1.45g/cm3And the strength of the non-metal yarn is more than 2.5 GPa.
The invention has the beneficial effects that:
1. the invention adopts the inner sheath layer, the middle sheath layer and the outer sheath layer with low density, the density of the inner sheath layer, the middle sheath layer and the outer sheath layer is less than that of seawater, and the structural size of each component unit is designed to balance the specific gravity of the photoelectric composite towing cable, so that the overall density of the cable is similar to that of the seawater, and the high-speed towing of the depth of the whole water area can be realized.
2. According to the invention, the power units are symmetrically and spirally twisted along the axis of the inner sheath layer, so that the integral roundness, uniformity and stability of the cable are ensured, and the cable is more suitable for the use requirement of reciprocating retraction.
3. The invention adopts the non-metal yarn with low density as the main bearing unit, and replaces the tensile structure of the traditional steel wire armor. Compared with a steel wire, the non-metal yarns are one fifth of the steel wire in density, the unit weight strength is 1.5 times of that of the steel wire, the strength of the cable can be improved while the weight of the cable can be reduced, the flexibility and flexibility of the photoelectric composite towing cable can be guaranteed, and the reciprocating retracting requirement can be met.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of a flexible zero-buoyancy photoelectric composite trailing cable according to the present invention;
fig. 2 is a schematic structural diagram of another embodiment of the flexible zero-buoyancy photoelectric composite towing cable of the invention.
The reference numbers in the figures illustrate: 1. a light unit; 2. an inner jacket layer; 3. a power unit; 4. a middle sheath layer; 5. a flexible reinforcing unit; 6. an outer jacket layer; 7. and filling the cells.
Detailed Description
The present invention is further described below in conjunction with the following figures and specific examples so that those skilled in the art may better understand the present invention and practice it, but the examples are not intended to limit the present invention.
Referring to fig. 1, an embodiment of the flexible zero-buoyancy photoelectric composite trailing cable of the present invention includes a light unit 1 disposed in the center, and an inner sheath layer 2, an electric power unit 3, a middle sheath layer 4, a flexible reinforcing unit 5, and an outer sheath layer 6 sequentially covering the light unit 1, where the electric power unit 3 is spirally twisted around the inner sheath layer 2 along the extending direction of the inner sheath layer 2 with the inner sheath layer 2 as an axis, so as to ensure the overall roundness and uniformity and stability of the cable, and meet the requirements of reciprocating retraction conditions. The flexible strengthening unit 5 is non-metal yarn, non-metal yarn twines outside middle sheath layer 4 with the mode of layering transposition, compares in its density of steel wire and is one fifth of steel wire, and unit weight intensity is 1.5 times of steel wire, the density of inner sheath layer 2, middle sheath layer 4, oversheath layer 6 is less than water, inner sheath layer 2, middle sheath layer 4, oversheath layer 6 are used for balancing the proportion of photoelectricity composite towing cable, make the whole density of cable be similar to the sea water, can realize the high-speed of full waters degree of depth and drag.
Specifically, the optical unit 1 comprises a plurality of loose tubes, the loose tubes are symmetrically arranged at a point of symmetry with the cable center as an axis, a plurality of optical fibers and filling ointment are arranged in the loose tubes, and the optical fiber ointment plays a water-blocking role on one hand and can also play hydrogen-blocking and buffering protection roles on the other hand; electric power unit 3 includes the conductor and the cladding insulating layer outside the conductor, electric power unit 3 uses inner sheath layer 2 to set up in inner sheath layer 2's periphery as the axle center symmetry, in this embodiment, optical unit 1 and electric power unit 3 are the symmetric design, and the structure symmetry of whole cable is round, the moment of torsion is balanced, avoids appearing drawing, under the side pressure condition towline serious deformation, at the in-process of towing at a high speed, can guarantee that the towed body gesture is balanced stable, ensures photoelectric signal's reliable transmission.
Specifically, the overall density of the photoelectric composite trailing cable is calculated according to the following formula:
overall mass M of the trailing cableCable with a flexible connectionThe calculation formula of (a) is as follows:
Mcable with a flexible connection＝∑(MX)＝∑(MPower unit+MLight unit+MFlexible reinforcement unit+MInner sheath layer+MMiddle sheath layer+MOuter sheath layer)，
Wherein M isX＝PX·VX，MXIs the mass of each unit, PXIs the density of each cell, VXIs the volume of each unit.
The overall volume V of the photoelectric composite trailing cableCable with a flexible connectionThe calculation formula of (a) is as follows:
wherein D isCable with a flexible connection＝∑(TX)＝∑(TPower unit+TLight unit+TFlexible reinforcement unit+TInner sheath layer+TMiddle sheath layer+TOuter sheath layer)，TXThe thickness of each unit or the outer diameter of each unit to the cable is increased.
In this embodiment, the photoelectric composite trailing cable with a unit length is calculated as follows:
overall mass M of the trailing cableCable with a flexible connectionThe quality of the optical unit 1, the quality of the inner sheath layer 2, the quality of the electric power unit 3, the quality of the middle sheath layer 4, the quality of the flexible reinforced unit 5 and the outerThe mass of the sheath layer 6 is the sum of the masses of the optical units 1, wherein the mass of the optical units 1 comprises the mass of optical fibers and the mass of a loose tube, the mass of the loose tube comprises four loose tubes, six optical fibers are arranged in each loose tube, the volume of each optical fiber is calculated according to a section circle, the mass of each optical fiber is obtained by combining the density of the optical fibers, the volume of each loose tube is calculated according to the section area of each round tube, the mass of each loose tube is obtained by combining the density of the loose tubes, and by analogy, the mass of the inner sheath layer 2, the mass of the power unit 3, the mass of the middle sheath layer 4, the mass of the flexible reinforcing unit 5 and the mass of the outer;
overall volume V of trailing cableCable with a flexible connectionCalculating according to the diameter of the cable, wherein the diameter of the cable comprises the sum of the diameter of the twisted optical units 1, the thickness of the double inner sheath layers 2, the diameter of the double power units 3, the thickness of the double middle sheath layers 4, the thickness of the double flexible reinforcing units 5 and the thickness of the double outer sheath layers 6;
by the overall mass M of the trailing cableCable with a flexible connectionIntegral volume V with trailing cableCable with a flexible connectionThe simultaneous formula makes whole density be close to the sea water, wherein, for satisfying the quality and the volume that use photoelectricity to go out book demand optical unit 1 and power unit 3 fixed, for satisfying the structure of the flexible unit 5 of strengthening of tensile demand of mechanical strength is fixed, through the size and the density of inner sheath layer 2 thickness, well restrictive coating 4 thickness, 6 thickness and the density adjustment cable of outer sheath layer in the adjustment formula. Final determination of the overall mass M of the trailing cableCable with a flexible connection1042.5kg, the outer diameter D of the trailing cableCable with a flexible connection36.0mm, the overall density rho of the photoelectric composite trailing cableCable with a flexible connectionIs 1.024g/cm3Similar to the density of seawater.
Specifically, the inner sheath layer 2, the middle sheath layer 4 and the outer sheath layer 6 are made of low-density materials, and the density is 0.89-0.95 g/cm3And the comparison parameters with the common sheath material refer to table 1:
TABLE 1
| The low-density material of the present example | Common sheath material | |
| Density of | 0.89～0.95g/cm3 | 1.15～1.6g/cm3 |
| Tensile strength | ≥20MPa | ≥16MPa |
| Elongation at break | ≥400％ | ≥400％ |
| Tear Strength (Right Angle) | ≥50kN/m | (not specified) |
From it can draw, the low density material of inner sheath layer 2, well restrictive coating 4, outer sheath layer 6 of this application is satisfying its low density simultaneously, also can satisfy other mechanical properties requirements.
Specifically, the nonmetal yarns are stranded outside the middle sheath layer 4 in a layered mode, the ratio of the stranding pitch diameter of two adjacent nonmetal yarns is the same, the stranding directions are opposite, the tensile property of the cable is improved, the torque balance is guaranteed, the nonmetal yarns are used for replacing a steel wire structure in the embodiment, the bending property of the cable is further improved, and the specific gravity of the cable is greatly reduced. The yarn of this embodiment is flexible strong, is favorable to buckling to its performance is better for steel wire structure, the contrast is strengthened with the steel wire to non-metallic yarn, and the density ratio is: 1.45/7.8, the strength ratio is 2.5GPa/1.96GPa, and the strength ratio per unit weight is as follows: 7/1, the non-metallic yarn performance parameters used are as shown in Table 2:
TABLE 2
| Strength of | ≥20cN/dtex |
| Elongation at break | ≤3.0％ |
| Tensile modulus | ≥120GPa |
| Density of | ≤1.45g/cm3 |
Referring to fig. 2, including the optical unit 1 that the center set up and cladding in proper order at optical unit 1 outer inner sheath layer 2, electric power unit 3, well restrictive coating 4, flexible reinforced unit 5 and oversheath layer 6, electric power unit 3 is twisted at its periphery with inner sheath layer 2 as axle center spiral, flexible reinforced unit 5 is non-metallic yarn, non-metallic yarn twines outside well restrictive coating 4 with the mode of layering transposition, inner sheath layer 2, well restrictive coating 4, the density of oversheath layer 6 are less than water, inner sheath layer 2, well restrictive coating 4, oversheath layer 6 are used for balancing the proportion that the photoelectric composite dragged the cable, make the whole density of cable be close to the sea water, can realize the high-speed of full water range degree of depth and drag.
In this embodiment, a filling unit 7 is further disposed in the partial cable type inner sheath layer 2, the filling unit 7 is a heat-resistant filling rope, and in some application scenarios, in order to ensure symmetry and roundness of the optical cable structure, the filling rope may be used to replace a loose tube.
The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. The equivalent substitution or change made by the technical personnel in the technical field on the basis of the invention is all within the protection scope of the invention. The protection scope of the invention is subject to the claims.
Claims (10)
1. The utility model provides a flexible zero buoyancy photoelectricity composite towing cable, its characterized in that, including the optical unit that the center set up with in proper order the cladding at optical unit outer inner sheath layer, electric power unit, well restrictive coating, flexible reinforcement unit and oversheath layer, electric power unit is twisted at its periphery at the extending direction spiral of inner sheath layer for the axle center with the inner sheath layer, flexible reinforcement unit is non-metallic yarn, non-metallic yarn twines outside well restrictive coating with the mode of layering transposition, the density of inner sheath layer, well restrictive coating, oversheath layer material is less than water for the proportion of balanced photoelectricity composite towing cable, the density that makes the cable is similar to the sea water. .
2. The flexible zero-buoyancy photoelectric composite trailing cable of claim 1, wherein the overall density of the photoelectric composite trailing cable is calculated as follows:
3. the flexible zero-buoyancy photoelectric composite trailing cable of claim 2, wherein the overall mass M of the trailing cableCable with a flexible connectionThe calculation formula of (a) is as follows:
Mcable with a flexible connection＝∑(MX)＝∑(MPower unit+MLight unit+MFlexible reinforcement unit+MInner sheath layer+MMiddle sheath layer+MOuter sheath layer)，
Wherein M isX＝PX·VX，MXIs the mass of each unit, PXIs the density of each cell, VXIs the volume of each unit.
4. The flexible zero-buoyancy photoelectric composite trailing cable of claim 2, wherein the overall volume V of the photoelectric composite trailing cableCable with a flexible connectionThe calculation formula of (a) is as follows:
wherein D isCable with a flexible connection＝∑(TX)＝∑(TPower unit+TLight unit+TFlexible reinforcement unit+TInner sheath layer+TMiddle sheath layer+TOuter sheath layer)，TXThe thickness of each unit or the outer diameter of each unit to the cable is increased.
5. The flexible zero-buoyancy photoelectric composite trailing cable according to claim 1, wherein the density of the inner sheath layer, the middle sheath layer and the outer sheath layer is 0.89-0.95 g/cm3。
6. The flexible zero-buoyancy photoelectric composite trailing cable according to claim 1, wherein the optical unit comprises a plurality of loose tubes, the loose tubes are symmetrically arranged with a center of the cable as an axis, and a plurality of optical fibers and filling ointment are arranged in the loose tubes.
7. The flexible zero-buoyancy photoelectric composite trailing cable according to claim 6, wherein a filling unit is arranged in the inner sheath layer according to requirements, and the filling unit is a heat-resistant filling rope.
8. The flexible zero-buoyancy photoelectric composite trailing cable according to claim 1, wherein the power unit comprises a conductor and an insulating layer coated outside the conductor, and the power unit is disposed around the inner sheath layer in an axisymmetric manner with the inner sheath layer as an axis.
9. The flexible zero-buoyancy photoelectric composite trailing cable according to claim 1, wherein the non-metallic yarns are stranded outside the middle sheath layer in layers, the ratio of the stranding pitch of two adjacent layers of non-metallic yarns is the same, and the stranding directions are opposite.
10. The flexible zero-buoyancy photoelectric composite trailing cable of claim 1, wherein the density of the non-metallic yarns is not greater than 1.45g/cm3And the strength of the non-metal yarn is more than 2.5 GPa.
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| CN202010785060.4A CN112117032A (en) | 2020-08-06 | 2020-08-06 | Flexible zero-buoyancy photoelectric composite trailing cable |
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| CN202010785060.4A CN112117032A (en) | 2020-08-06 | 2020-08-06 | Flexible zero-buoyancy photoelectric composite trailing cable |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117433587A (en) * | 2023-12-14 | 2024-01-23 | 江苏南方通信科技有限公司 | Symmetrical-structure multi-parameter weak grating sensing optical cable, sensing system and measuring method |
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| CN117433587A (en) * | 2023-12-14 | 2024-01-23 | 江苏南方通信科技有限公司 | Symmetrical-structure multi-parameter weak grating sensing optical cable, sensing system and measuring method |
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Application publication date: 20201222 |
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