CN110739098A - Miniature easily-branched rat-proof photoelectric composite cable for wireless small base station and preparation method thereof - Google Patents
Miniature easily-branched rat-proof photoelectric composite cable for wireless small base station and preparation method thereof Download PDFInfo
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- CN110739098A CN110739098A CN201911012584.3A CN201911012584A CN110739098A CN 110739098 A CN110739098 A CN 110739098A CN 201911012584 A CN201911012584 A CN 201911012584A CN 110739098 A CN110739098 A CN 110739098A
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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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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01M—CATCHING, TRAPPING OR SCARING OF ANIMALS; APPARATUS FOR THE DESTRUCTION OF NOXIOUS ANIMALS OR NOXIOUS PLANTS
- A01M29/00—Scaring or repelling devices, e.g. bird-scaring apparatus
- A01M29/30—Scaring or repelling devices, e.g. bird-scaring apparatus preventing or obstructing access or passage, e.g. by means of barriers, spikes, cords, obstacles or sprinkled water
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L55/00—Compositions of homopolymers or copolymers, obtained by polymerisation reactions only involving carbon-to-carbon unsaturated bonds, not provided for in groups C08L23/00 - C08L53/00
- C08L55/02—ABS [Acrylonitrile-Butadiene-Styrene] polymers
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4401—Optical cables
- G02B6/4429—Means specially adapted for strengthening or protecting the cables
- G02B6/443—Protective covering
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
-
- 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
- H01B7/08—Flat or ribbon cables
- H01B7/0869—Flat or ribbon cables comprising one or more armouring, tensile- or compression-resistant elements
-
- 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
-
- 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
- H01B7/1825—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring comprising synthetic filaments forming part of a high tensile strength core
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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
- H01B7/22—Metal wires or tapes, e.g. made of steel
- H01B7/221—Longitudinally placed metal wires or tapes
- H01B7/223—Longitudinally placed metal wires or tapes forming part of a high tensile strength core
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/20—Applications use in electrical or conductive gadgets
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
Abstract
The invention discloses miniature easily-branched rat-proof photoelectric composite cables for wireless small base stations and also provides methods for preparing the photoelectric composite cables, wherein each photoelectric composite cable comprises an optical unit positioned in the center, electric units symmetrically arranged on two sides of the optical unit and an outer sheath covering the optical unit and the electric units, each optical unit comprises a wire core and a rat-proof protective layer covering the wire core, each rat-proof protective layer comprises an inner protective layer, an intermediate protective layer and an outer protective layer, each inner protective layer is a metal armor layer, each intermediate protective layer is a rat-proof layer, each rat-proof layer comprises 10-12 parts by weight of PV plastic, 23-25 parts by weight of ABS plastic, 1.6-1.8 parts by weight of compatilizer ABS-g-MAH and 2-4 parts by weight of plant rat-proof agent, each plant-proof agent comprises 35-41 parts by weight of capsaicin, 42-44 parts by weight of berberine, 12-14 parts by weight of croton toxin, 6-8 parts of capsaicin and 3-5 parts by weight of kushenin the outer wall of the outer protective layer, and a plurality of rat-proof concave parts and a plurality of light rat-proof concave parts are arranged along the direction in turn.
Description
Technical Field
The invention relates to the technical field of optical cables, in particular to a miniature easily-branched rat-proof photoelectric composite cable for wireless small base stations, and further relates to a preparation method of a miniature easily-branched rat-proof photoelectric composite cable for wireless small base stations.
Background
At present, , which is the mark of future technology development, of 5G has become an important place for various operators in the world, the commercial date of 5G is more and more recent, and the attention of the market to small base stations is more and more multiplied, because 5G operating in a frequency band with higher frequency faces to the problem of signal coverage, the small base stations can serve as 'supplements' to expand the signal coverage, which can also solve the problem of overlarge power consumption caused by too weak signals and enhanced radio frequency transmission power of mobile equipment.
In addition , the small base station optical cable is required to have the rat-proof function, at present, the rat-proof optical cable mainly comprises types of physical rat-proof optical cables and types of chemical rat-proof optical cables, the physical rat-proof optical cables usually adopt an armor protection mode, and an effective method comprises metal tape armor, stainless steel armor or nylon protection, so that the rat cannot bite and damage the internal optical cables, and the rat-proof effect is achieved.
Disclosure of Invention
The invention aims to provide miniature easily-branched rat-proof photoelectric composite cables which are used for wireless small base stations and have the advantages of obvious rat-proof effect, light weight and low cost, and also relates to a preparation method of photoelectric composite cables.
In order to solve the technical problem, the invention provides miniature easily-branched rat-proof photoelectric composite cable for a wireless small base station, which comprises an optical unit, electric units and an outer sheath, wherein the optical unit is positioned in the center, the electric units are symmetrically arranged on two sides of the optical unit, the outer sheath coats the optical unit and the electric units, the optical unit comprises a wire core and a rat-proof protective layer coated outside the wire core, the rat-proof protective layer comprises an inner protective layer, a middle protective layer and an outer protective layer, the inner protective layer is a metal armor layer, the middle protective layer is a rat-proof layer, the rat-proof layer comprises 10-12 parts by weight of PV plastic, 23-25 parts by weight of ABS plastic, 1.6-1.8 parts by weight of compatilizer ABS-g-MAH and 2-4 parts by weight of plant rat-proof agent, the plant rat-proof agent comprises 35-41 parts by weight of capsaicin, 42-44 parts by weight of berberine, 12-14 parts by weight of croton toxin, 6-8 parts by weight of kurarinone and 3-5 parts of tobramycin, the outer wall of the outer protective layer is serrated, and is provided.
Preferably, the thickness of the convex part in the radial direction is 3 to 4 times the thickness of the concave part in the radial direction.
Preferably, the capsaicin is extracted from capsicum, the berberine is extracted from coptis, the croton toxin is extracted from croton, the oxymatrine is extracted from sophora flavescens, and the tobacco extract is extracted from tobacco.
According to the technical scheme, the photoelectric composite cable is characterized in that three rat-proof protective layers are arranged on the surface of a wire core of an inner optical unit, the th rat-proof protective layer is a conventional metal armor layer to form a physical rat-proof layer with a remarkable rat-proof effect, the second rat-proof protective layer is a rat-proof agent protective layer to form a chemical rat-proof layer, plant rat-proof agents used for generating peculiar smell in the chemical rat-proof layer are all extracted from plants, and cannot pollute the environment, meanwhile, the thickness of the physical rat-proof layer can be reduced on the premise that the physical rat-proof effect in the prior art is achieved by adopting the matching of the physical rat-proof layer and the chemical rat-proof layer, for example, under the requirement of achieving a certain rat-proof effect, a metal armor layer with the thickness of 8-10 mm needs to be designed in the prior art, the rat-proof protective layer adopting the technical scheme of the invention, the same metal armor layer with the thickness of 2-3 mm, the rat-proof agent protective layer with the thickness of 3.8mm needs to be matched with an outer metal armor layer with the thickness of 4.2-4.5 mm, and the weight of the rat-proof protective layer can be greatly reduced in the design of the prior art.
, a plurality of convex parts and concave parts are designed on the third layer of the rat-proof layer along the circumferential direction, the strength of the concave parts is weaker than that of the convex parts compared with that of the concave parts, the concave parts are damaged before the convex parts when a rat bites, namely, the concave parts are easy to bite, the rat is indirectly induced to bite from the concave parts preferentially, after th layer of the rat-proof layer contacts the second layer of the rat-proof layer, the rat bite is abandoned due to smell, the time difference from the rat bite to the abandonment of the rat bite is shortened, and the convex parts are protected to a certain extent by .
, the third layer of rat-proof layer is designed with a plurality of convex parts and concave parts along the circumference direction, the concave parts are recessed compared with the convex parts, the strength of the concave parts is weaker than that of the convex parts, the concave parts are destroyed before the convex parts when the rat bites, namely the rat bites at the concave parts and contacts the second layer of rat-proof layer first, the rat bites into the second layer of rat-proof layer and can give up because of smell, the convex parts are partially reserved at the moment, and the partially reserved convex parts can provide effective lateral pressure resistance and impact strength for the wire core.
In preferred embodiments of the present invention, step includes providing a strap on the outer sheath between the light unit and the electrical unit, the strap serving as an electrical unit tear notch that is created when the electrical unit is extruded through the die.
In preferred embodiments of the present invention, step includes providing a light unit tear on the outer jacket between the electrical unit tear and the light unit, the light unit tear being created when the light unit tear is extruded through a die.
According to the technical scheme, the photoelectric composite cable comprises the optical unit and the electric unit, optical signals are transmitted through the optical unit, and the alternating current power supply is transmitted through the electric unit. When the optical unit is actually used, the electric unit can be simply and conveniently separated from the optical unit through the tearing opening of the electric unit, so that the design of easy branching is realized; the outer sheath can be simply and conveniently torn through the optical unit tearing opening to expose the loose tube and take out the wire core, so that the construction time is saved, and the construction progress is accelerated.
In preferred embodiments of the present invention, the step further includes that a non-metal reinforced layer is disposed on the wire core, the non-metal reinforced layer is located on the inner side of the rat-proof protective layer, and the non-metal reinforced layer is formed by twisting or wrapping aramid fibers or glass fiber yarns.
According to the technical scheme, the nonmetal reinforcing layer formed by twisting or lapping aramid fiber or glass fiber yarns plays roles in blocking water and improving the tensile property of the wire core, and simultaneously plays a role in preventing the rat bite, so that the rat bite prevention protective layer in the metal armor layer is formed.
In preferred embodiments of the present invention, the step further includes disposing a reinforcement inside the outer sheath between the optical unit and the electrical unit, the reinforcement being disposed parallel to the power feeding wires of the electrical unit, the reinforcement being a high carbon phosphated steel wire or a non-metallic glass fiber reinforced rod.
According to the technical scheme of the invention, the reinforcing piece formed by the high-carbon phosphated steel wire or the non-metallic glass fiber reinforcing rod provides powerful strength support for the photoelectric composite cable.
In preferred embodiments of the present invention, the step includes the core comprising a loose tube of polybutylene terephthalate and an optical fiber inside the loose tube, the optical fiber being either a single mode optical fiber or a multimode optical fiber.
In preferred embodiments of the present invention, step includes disposing a water-blocking material between the optical fibers in the loose tube, wherein the water-blocking material is a water-blocking yarn or a water-blocking fiber paste.
In order to solve the technical problems, the invention also provides a preparation method of miniature easily-branched rat-proof photoelectric composite cables for the wireless small base station, which comprises the following steps,
(1) extruding a polybutylene terephthalate loose tube outside an optical fiber under the process conditions of controlling the paying-off tension of the optical fiber to be 60g +/-5 g, controlling the taking-up tension to be 65g +/-5 g and controlling the excess length of the optical fiber to be 0-0.6 per mill, wherein a water-blocking substance is arranged in the loose tube around the optical fiber;
(2) wrapping or stranding aramid fiber or glass fiber yarns on the loose tube obtained in the step (1) to prepare a wire core;
(3) wrapping the metal armor layer outside the wire core obtained in the step (2), and sequentially extruding a rat-proof layer and an outer protective layer outside the metal armor layer to form an optical unit based on a double-layer co-extrusion process;
(4) groups of optical units, two reinforcing pieces and two groups of electric units obtained in the step (3) are taken, wherein the optical units, the reinforcing pieces and the electric units are all placed in parallel, the two groups of electric units are symmetrically distributed on two sides of the optical units by taking the optical units as centers, and the two groups of reinforcing pieces are respectively positioned on two sides of the optical units and between the optical units and the electric units;
(5) extruding the outer sheath outside the light unit, the reinforcing member and the electric unit which are arranged in the step (4).
The invention has the beneficial effects that:
the rat-proof photoelectric composite cable adopts a multi-layer rat-proof design, the metal armor layer, the rat-proof layer and the outer protective layer are sequentially stacked on the surface of the wire core of the optical unit, the rat-proof is induced indirectly through the physical rat-proof layer, the chemical rat-proof layer and the outer protective layer of the metal armor layer, and the metal armor layer is matched layer by layer and is associated layer by layer, so that the remarkable rat-proof effect is achieved.
The rat-proof photoelectric composite cable prepared based on the preparation method adopts a multi-layer rat-proof design, the metal armor layer, the rat-proof layer and the outer protective layer are sequentially stacked on the surface of the wire core of the optical unit, the rat-proof is induced indirectly through the physical rat-proof of the metal armor layer, the chemical rat-proof of the rat-proof layer and the outer protective layer, and the rat-proof effect is achieved through layer-by-layer matching and layer-by-layer association.
Drawings
Fig. 1 is a schematic structural view of an optical-electrical composite cable according to a preferred embodiment of the present invention.
The reference numbers in the figures illustrate: 2-electrical unit, 4-outer sheath, 6-loose tube, 8-inner protective layer, 10-middle protective layer, 12-outer protective layer, 14-concave part, 16-convex part, 17-optical fiber, 18-sling, 20-optical unit tearing opening, 22-non-metal reinforced layer, 24-reinforcing piece and 26-water-blocking yarn.
Detailed Description
The present invention is further illustrated in conjunction with the accompanying drawings and the specific embodiments so that those skilled in the art can better understand the present invention and can practice it, but the embodiments are not to be construed as limiting the present invention.
Examples
The embodiment provides miniature easily-branched rat-proof photoelectric composite cable for a wireless small base station, which is flat as a whole and comprises an optical unit positioned in the center, electric units 2 symmetrically arranged on two sides of the optical unit and an outer sheath 4 covering the optical unit and the electric units 2, wherein the optical unit is positioned in the center, two groups of the electric units 2 are symmetrically arranged on two sides of the optical unit by taking the optical unit as the center, a reinforcing member 24 parallel to the optical unit and the electric units is arranged between the optical unit and the electric units, and the centers of the optical unit, the electric units and the reinforcing member are positioned on the same straight lines.
The optical unit comprises a wire core and a rat-proof protective layer coated outside the wire core. The wire core comprises a polybutylene terephthalate loose tube 6 and optical fibers 17 positioned in the loose tube 6, the optical fibers 17 are single-mode optical fibers or multi-mode optical fibers, and water blocking objects are arranged between the optical fibers 17 in the loose tube 6. In the technical scheme of the embodiment, the water-blocking object is water-blocking yarn 26 or water-blocking fiber paste. Above-mentioned loose 6 outer transposition of sleeve pipe or around having non-metal reinforcement layer, among the technical scheme of this embodiment, this non-metal reinforcement layer is formed by aramid fiber or glass fiber yarn through transposition or around the package.
The ratproof protective layer comprises an inner protective layer 8, an intermediate protective layer 10 and an outer protective layer 12, wherein the inner protective layer 8 is a metal armor layer, the intermediate protective layer 10 is a ratproof layer, the outer wall of the outer protective layer 12 is in a sawtooth shape and is provided with a plurality of convex parts 16 and a plurality of concave parts 14 along the circumferential direction, the convex parts 16 and the concave parts 14 are sequentially and alternately arranged, and the thickness of the convex parts 16 in the radial direction is 3-4 times of that of the concave parts 14 in the radial direction.
In the technical scheme of the embodiment, the rat-proof layer comprises the following specific components in percentage by weight:
TABLE 1
In the technical scheme of the embodiment, the specific components of the plant rodenticide are as follows:
TABLE 2
The capsaicin is extracted from Capsici fructus, the berberine is extracted from Coptidis rhizoma, the croton toxin is extracted from fructus crotonis, the kurarinone is extracted from radix Sophorae Flavescentis, and the tobacco extract is extracted from tobacco.
The preparation method of the miniature easily-branched rat-proof photoelectric composite cable for the wireless small base station comprises the following steps,
(1) extruding a polybutylene terephthalate loose tube outside the optical fiber under the process conditions of controlling the paying-off tension of the optical fiber to be 60g +/-5 g, controlling the taking-up tension to be 65g +/-5 g and controlling the excess length of the optical fiber to be 0-0.6 per mill, wherein a water-blocking substance is arranged in the loose tube around the optical fiber;
(2) wrapping or stranding aramid fiber or glass fiber yarns on the loose tube obtained in the step (1) to prepare a wire core;
(3) wrapping the metal armor layer outside the wire core obtained in the step (2), and sequentially extruding a rat-proof layer and an outer protective layer outside the metal armor layer to form an optical unit based on a double-layer co-extrusion process;
(4) groups of optical units, two reinforcing pieces and two groups of electric units obtained in the step (3) are taken, the optical units, the reinforcing pieces and the electric units are all placed in parallel, the two groups of electric units are symmetrically distributed on two sides of the optical units by taking the optical units as centers, and the two groups of reinforcing pieces are respectively positioned on two sides of the optical units and between the optical units and the electric units;
(5) extruding the outer sheath outside the light unit, the reinforcing member and the electric unit which are arranged in the step (4).
The rat-proof photoelectric composite cable adopts a multi-layer rat-proof design, the metal armor layer, the rat-proof layer and the outer protective layer are sequentially stacked on the surface of the wire core of the optical unit, the rat-proof is induced indirectly through the physical rat-proof layer, the chemical rat-proof layer and the outer protective layer of the metal armor layer, and the metal armor layer is matched layer by layer and is associated layer by layer, so that the remarkable rat-proof effect is achieved.
The photoelectric composite cable prepared by the preparation method adopts a multi-layer rat-proof design, the metal armor layer, the rat-proof layer and the outer protective layer are sequentially stacked on the surface of the wire core of the optical unit, the rat-proof is induced indirectly through the physical rat-proof of the metal armor layer, the chemical rat-proof of the rat-proof layer and the outer protective layer, and the rat-proof effect is achieved through layer-by-layer coordination and layer-by-layer association.
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)
- The miniature easily-branched rat-proof photoelectric composite cable for the wireless small base stations comprises an optical unit located in the center, electric units symmetrically arranged on two sides of the optical unit and an outer sheath covering the optical unit and the electric units, and is characterized in that the optical unit comprises a wire core and a rat-proof protective layer covering the wire core, the rat-proof protective layer comprises an inner protective layer, a middle protective layer and an outer protective layer, the inner protective layer is a metal armor layer, the middle protective layer is a rat-proof layer, the rat-proof layer comprises 10-12 parts by weight of PV plastic, 23-25 parts by weight of ABS plastic, 1.6-1.8 parts by weight of compatilizer ABS-g-MAH and 2-4 parts by weight of plant rat-proof agent, the plant rat-proof agent comprises 35-41 parts by weight of capsaicin, 42-44 parts by weight of berberine, 12-14 parts by weight of croton toxin, 6-8 parts by weight of kurarinone and 3-5 parts by weight of tobramycin, the outer wall of the outer protective layer is serrated, and is provided with a plurality of convex parts and a plurality of concave parts and the convex parts and.
- 2. The micro easy-branching rat-proof photoelectric composite cable for the wireless small base station according to claim 1, characterized in that: the thickness of the convex part in the radial direction is 3-4 times of that of the concave part in the radial direction.
- 3. The micro easy-branching rat-proof photoelectric composite cable for the wireless small base station according to claim 1, characterized in that: the capsaicin is extracted from capsicum, the berberine is extracted from coptis, the croton toxin is extracted from croton, the oxymatrine is extracted from sophora flavescens, and the tobacco extract is extracted from tobacco.
- 4. The micro easy-branching rat-proof photoelectric composite cable for the wireless small base station according to claim 1, characterized in that: and a hanging strip is arranged on the outer protective sleeve between the optical unit and the electric unit and is used as a tearing opening of the electric unit, and the tearing opening of the electric unit is generated when the electric unit is extruded through a die.
- 5. The micro easy-to-branch ratproof photoelectric composite cable for the wireless small base station according to claim 4, wherein: and an optical unit tearing opening is formed in the outer protective sleeve between the electric unit tearing opening and the optical unit and is generated when the optical unit tearing opening is extruded through a die.
- 6. The micro easy-branching rat-proof photoelectric composite cable for the wireless small base station according to claim 1, characterized in that: the cable core is provided with a nonmetal reinforcing layer, the nonmetal reinforcing layer is positioned on the inner side of the rat-proof protective layer and is formed by twisting or wrapping aramid fibers or glass fiber yarns.
- 7. The micro easy-branching rat-proof photoelectric composite cable for the wireless small base station according to claim 1, characterized in that: the light unit is arranged in the outer sheath, the electric unit is arranged in the outer sheath, the reinforcing part is arranged in parallel with a feeder line of the electric unit, and the reinforcing part is a high-carbon phosphated steel wire or a non-metal glass fiber reinforcing rod.
- 8. The micro easy-branching rat-proof photoelectric composite cable for the wireless small base station according to claim 1, characterized in that: the cable core comprises a polybutylene terephthalate loose tube and an optical fiber positioned in the loose tube, and the optical fiber is a single-mode optical fiber or a multi-mode optical fiber.
- 9. The micro easy-branching rat-proof photoelectric composite cable for the wireless small base station according to claim 8, wherein: and water-blocking objects are arranged among the optical fibers in the loose tubes, and the water-blocking objects are water-blocking yarns or water-blocking fiber paste.
- 10. The method for preparing a micro-branched ratproof optical-electrical composite cable for a wireless cell site as claimed in any one of claims 1-9, comprising the steps of,(1) extruding a polybutylene terephthalate loose tube outside an optical fiber under the process conditions of controlling the paying-off tension of the optical fiber to be 60g +/-5 g, controlling the taking-up tension to be 65g +/-5 g and controlling the excess length of the optical fiber to be 0-0.6 per mill, wherein a water-blocking substance is arranged in the loose tube around the optical fiber;(2) wrapping or stranding aramid fiber or glass fiber yarns on the loose tube obtained in the step (1) to prepare a wire core;(3) wrapping the metal armor layer outside the wire core obtained in the step (2), and sequentially extruding a rat-proof layer and an outer protective layer outside the metal armor layer to form an optical unit based on a double-layer co-extrusion process;(4) groups of optical units, two reinforcing pieces and two groups of electric units obtained in the step (3) are taken, wherein the optical units, the reinforcing pieces and the electric units are all placed in parallel, the two groups of electric units are symmetrically distributed on two sides of the optical units by taking the optical units as centers, and the two groups of reinforcing pieces are respectively positioned on two sides of the optical units and between the optical units and the electric units;(5) extruding the outer sheath outside the light unit, the reinforcing member and the electric unit which are arranged in the step (4).
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111899944A (en) * | 2020-07-14 | 2020-11-06 | 杭州富通通信技术股份有限公司 | Rat-proof and termite-proof photoelectric composite cable |
| CN114942500A (en) * | 2022-07-25 | 2022-08-26 | 长飞光纤光缆股份有限公司 | Rat-proof belt for optical cable and preparation method thereof |
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| CN111899944A (en) * | 2020-07-14 | 2020-11-06 | 杭州富通通信技术股份有限公司 | Rat-proof and termite-proof photoelectric composite cable |
| CN111899944B (en) * | 2020-07-14 | 2022-03-04 | 杭州富通通信技术股份有限公司 | Rat-proof and termite-proof photoelectric composite cable |
| CN114942500A (en) * | 2022-07-25 | 2022-08-26 | 长飞光纤光缆股份有限公司 | Rat-proof belt for optical cable and preparation method thereof |
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