CN115188535A - Embedded optical fiber temperature measurement integrated cable - Google Patents
Embedded optical fiber temperature measurement integrated cable Download PDFInfo
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- CN115188535A CN115188535A CN202210962233.4A CN202210962233A CN115188535A CN 115188535 A CN115188535 A CN 115188535A CN 202210962233 A CN202210962233 A CN 202210962233A CN 115188535 A CN115188535 A CN 115188535A
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Images
Classifications
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- H—ELECTRICITY
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- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/28—Protection against damage caused by moisture, corrosion, chemical attack or weather
- H01B7/2806—Protection against damage caused by corrosion
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B11/00—Communication cables or conductors
- H01B11/02—Cables with twisted pairs or quads
- H01B11/06—Cables with twisted pairs or quads with means for reducing effects of electromagnetic or electrostatic disturbances, e.g. screens
- H01B11/10—Screens specially adapted for reducing interference from external sources
- H01B11/1008—Features relating to screening tape per se
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B11/00—Communication cables or conductors
- H01B11/22—Cables including at least one electrical conductor together with optical fibres
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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
- H01B13/22—Sheathing; Armouring; Screening; Applying other protective layers
- H01B13/24—Sheathing; Armouring; Screening; Applying other protective layers by extrusion
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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
- H01B13/22—Sheathing; Armouring; Screening; Applying other protective layers
- H01B13/26—Sheathing; Armouring; Screening; Applying other protective layers by winding, braiding or longitudinal lapping
- H01B13/2613—Sheathing; Armouring; Screening; Applying other protective layers by winding, braiding or longitudinal lapping by longitudinal lapping
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- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
- H01B3/44—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins
- H01B3/441—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins from alkenes
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- H—ELECTRICITY
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- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/02—Disposition of insulation
- H01B7/0208—Cables with several layers of insulating material
- H01B7/0225—Three or more layers
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- 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
- H01B7/186—Sheaths comprising longitudinal lapped non-metallic layers
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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
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- 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
- H01B7/28—Protection against damage caused by moisture, corrosion, chemical attack or weather
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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
- H01B7/28—Protection against damage caused by moisture, corrosion, chemical attack or weather
- H01B7/2813—Protection against damage caused by electrical, chemical or water tree deterioration
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- H—ELECTRICITY
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- 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
- H01B7/29—Protection against damage caused by extremes of temperature or by flame
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Electromagnetism (AREA)
- Communication Cables (AREA)
Abstract
The invention relates to an embedded optical fiber temperature measurement integrated cable, which belongs to the technical field of special cables and comprises a copper core conductor, an inner shielding layer and a protective layer, wherein the inner shielding layer sequentially comprises a conductor shielding layer, an XLPE (cross linked polyethylene) insulating layer, an insulating shielding layer and a metal shielding layer from inside to outside, an optical fiber cable is laid in the insulating shielding layer in a sine wave mode and comprises an optical fiber bundle and a protective sleeve coated on the outer side of the optical fiber bundle; the optical fiber cable takes the modified polyvinyl chloride elastomer as the protective layer of the optical fiber bundle, and improves the service life of the optical fiber bundle by utilizing the high mechanical property, weather resistance, chemical corrosion resistance and heat resistance of the modified polyvinyl chloride elastomer; meanwhile, a plurality of strands of paper ropes or hemp ropes are wound on the outer side of the optical fiber cable, and the soft wire has buffering and protecting effects; and finally, the optical fiber cable is laid in a sine wave form, so that the sensitivity and effectiveness of optical fiber bundle temperature measurement are improved.
Description
Technical Field
The invention belongs to the technical field of special cables, and particularly relates to an embedded optical fiber temperature measurement integrated cable.
Background
At present, in a power transmission line, an optical fiber temperature measurement system is often adopted to monitor the temperature of each point of a cable. The optical fiber temperature measuring system lays a temperature measuring optical cable along the cable, and the temperature measuring optical cable can continuously obtain the temperature of each point along the cable.
However, the conventional optical fiber cable and the composite power cable have the following technical problems: since the mechanical strength of the optical fiber is very weak, the optical fiber is easily damaged. Therefore, on the one hand, the optical fiber is accommodated in a metal conduit with high strength and small radius of curvature in the prior art, but the metal conduit may damage the insulation shielding layer, thereby reducing the insulation strength; meanwhile, the metal conduit can affect the electric field distribution state of the cable; on the other hand, in the prior art, the optical fiber is fixed by adopting the factice, but in actual use, the factice is easy to melt when meeting high temperature, which causes adverse effect on the optical fiber cable and also influences the construction work of the cable joint.
Therefore, it is highly desirable to improve the existing optical fiber protection process to improve the sensitivity and effectiveness of optical fiber temperature measurement without damaging the insulation shielding layer and affecting the electric field distribution state of the cable.
Disclosure of Invention
In order to solve the technical problems mentioned in the background technology, the invention provides an embedded optical fiber temperature measurement integrated cable.
The purpose of the invention can be realized by the following technical scheme:
the embedded optical fiber temperature measurement integrated cable comprises a copper core conductor, an inner shielding layer and a protective layer, wherein an optical fiber cable is laid in the inner shielding layer;
the inner shielding layer sequentially comprises a conductor shielding layer, an XLPE insulating layer, an insulating shielding layer and a metal shielding layer from inside to outside; the optical fiber cable is laid in the insulation shielding layer, and a plurality of strands of soft wires are wound on the outer side of the optical fiber cable;
the protective layer comprises a filling layer, an inner protective layer, an isolating sleeve, an armor layer and an outer protective layer from inside to outside in sequence.
Further, the optical fiber cable comprises an optical fiber bundle and a protective sleeve coated on the outer side of the optical fiber bundle, the protective sleeve is made of a modified polyvinyl chloride elastomer, and the modified polyvinyl chloride elastomer is prepared by the following steps:
adding polyvinyl chloride resin into a mixer, adding chlorinated polyvinyl chloride, a calcium-zinc composite stabilizer, calcium carbonate, polyethylene wax and an antioxidant, stirring for 10-15min at 90 ℃, adding pretreated glass fiber, heating to 120 ℃, stirring for 8-10min, transferring to an extruder for extrusion to obtain a premix, banburying the premix in an internal mixer at 170 ℃ for 10-15min, and cooling to obtain the modified polyvinyl chloride elastomer.
In the reaction, the glass fiber soaked by the silane coupling agent KH550 is added into the polyvinyl chloride, so that the prepared composite material has higher mechanical property, the nonmetal modified polyvinyl chloride protective sleeve is used for replacing the traditional metal conduit to protect the optical fiber, the modified polyvinyl chloride has excellent mechanical property, and the nonmetal material does not influence the electric field distribution state of the cable.
Further, the mass ratio of the polyvinyl chloride resin, the chlorinated polyvinyl chloride, the calcium-zinc composite stabilizer, the calcium carbonate, the polyethylene wax, the antioxidant and the pretreated glass fiber is 90-100:45-55:3-5:20-30:1-3:1-3:10-15.
Further, the pretreatment step comprises: soaking the glass fiber in a silane coupling agent KH550, keeping for 10min and continuously oscillating, taking out the glass fiber, standing for 1-2h at room temperature, drying for 4h at 120 ℃, and cooling for later use to obtain the pretreated glass fiber.
In the above reaction, the glass fiber is treated with the silane coupling agent KH550, and the silane coupling agent KH550 is a surface treatment agent of a high molecular compound type, and from the structural point of view, the silane coupling agent KH550 has a function of forming a chemical bond between the surface of the glass fiber and the resin, and plays a role of bridging in the resin-based composite material. The silane coupling agent KH550 is used for treating the surface of the glass fiber, so that the wettability between the glass fiber and a matrix can be improved, a mechanical micro buffer area is formed, the surface of the glass fiber is protected, and the bonding of a glass and resin interface is greatly enhanced; meanwhile, the glass fiber treated by the silane coupling agent KH550 can enhance the weather resistance, chemical resistance, heat resistance and mechanical strength of the finally prepared protective layer.
Further, the mass ratio of the glass fibers to the silane coupling agent KH550 is 150:300.
furthermore, the antioxidant is composed of an antioxidant 1076, an antioxidant 1010 and an antioxidant 168 according to a weight ratio of 1.5-2.5.
Further, the soft wire is a paper rope or a hemp rope.
In above-mentioned structure, select for use paper rope or hemp rope to wind as soft wire and establish in the optical fiber cable outside, at first soft wire is more obedient, and when optical fiber cable received radial external force, soft wire played certain cushioning effect, and soft wire texture is softer simultaneously, can provide certain removal space for optical fiber cable, plays certain guard action.
Furthermore, the conductor shielding layer and the insulation shielding layer are made of semiconductor electric belts; the XLPE insulating layer is made of cross-linked polyethylene; the metal shielding layer is made of copper strips.
Furthermore, the filling layer is made of polypropylene ropes; the inner protection layer and the outer protection layer are made of polyvinyl chloride; the isolation sleeve is made of polytetrafluoroethylene; the armor layer is made of steel belts.
Further, the production process of the embedded optical fiber temperature measurement integrated cable comprises the following steps:
s1, twisting a plurality of copper wire bundles and then twisting the copper wire bundles again to form a copper core conductor;
s1, twisting the optical fiber filling strips and 6 optical fibers in a 0+6 twisting mode to form an optical fiber bundle, extruding and wrapping a modified polyvinyl chloride elastomer on the outer side of the optical fiber bundle to form a protective sleeve to manufacture an optical fiber cable, and wrapping a plurality of strands of soft wires on the outer side of the optical fiber cable to form an embedded body;
s3, extruding and wrapping the conductor shielding layer, the XLPE insulating layer, the insulating shielding layer and the embedding body outside the copper core conductor in a co-extrusion mode, wherein the embedding body is laid in the middle of the insulating shielding layer in a sine wave mode, and then extruding and wrapping the metal shielding layer on the outermost side to obtain the optical fiber composite core;
s4, stranding 3 optical fiber composite cores into a cable, simultaneously adding a polypropylene rope for filling, then wrapping an inner protection layer and extruding an isolation sleeve, and finally armoring and extruding an outer protection layer to obtain the embedded optical fiber temperature measurement integrated cable.
In the process, the embedding body is laid in the middle of the insulating shielding layer in the sine wave form in the step S3, and the sensitivity and the effectiveness of optical fiber temperature measurement can be improved by laying in the sine wave form.
The invention has the beneficial effects that:
the optical fiber cable takes the modified polyvinyl chloride elastomer as a protective layer of the optical fiber bundle, and improves the service life of the optical fiber bundle by utilizing the high mechanical property, weather resistance, chemical corrosion resistance and heat resistance of the modified polyvinyl chloride elastomer.
Meanwhile, the outer side of the optical fiber cable is wrapped with a plurality of strands of paper ropes or hemp ropes, the paper ropes or hemp ropes are selected as soft wires to be wound on the outer side of the optical fiber cable, the soft wires are more compliant, when the optical fiber cable is subjected to radial external force, the soft wires play a certain buffering role, and meanwhile, the soft wires are softer in texture, can provide a certain moving space for the optical fiber cable, and play a certain protection role.
Finally, when the cable is produced, the embedded body (formed by wrapping a plurality of strands of soft wires on the outer side of the optical fiber cable in a winding mode) is laid in the middle of the insulating shielding layer in a sine wave mode, so that the sensitivity and the effectiveness of optical fiber bundle temperature measurement are improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural view of an optical fiber cable according to the present invention;
FIG. 2 is a schematic structural view of an optical fiber composite core according to the present invention;
FIG. 3 is a schematic structural diagram of an embedded optical fiber temperature measurement integrated cable according to the present invention;
FIG. 4 is a schematic view of the structure of the insert of the present invention.
In the drawings, the components represented by the respective reference numerals are listed below:
1. an optical fiber cable; 11. an optical fiber bundle; 12. a protective sleeve; 2. a soft wire; 3. a copper-core conductor; 4. An inner shield layer; 41. a conductor shield layer; 42. an XLPE insulating layer; 43. an insulating shield layer; 44. a metal shielding layer; 5. a protective layer; 51. a filling layer; 52. an inner protective layer; 53. an isolation sleeve; 54. an armor layer; 55. an outer jacket; 6. an insert.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-4, the present invention is an embedded optical fiber temperature measurement integrated cable, including a copper core conductor 3, an inner shield layer 4 and a protective layer 5, wherein the inner shield layer 4 is coated outside the copper core conductor 3, and plays a role in isolating the conductor, preventing current leakage, and limiting electric field and electromagnetic interference. The protective layer 5 is used to protect the copper core conductor 3 and the inner shield layer 4 from external force.
The inner shielding layer 4 comprises a conductor shielding layer 41, an XLPE insulating layer 42, an insulating shielding layer 43 and a metal shielding layer 44 from inside to outside in sequence, wherein the conductor shielding layer 41 and the insulating shielding layer 43 are made of semiconductor electric tapes; the XLPE insulating layer 42 is made of cross-linked polyethylene; the material of the metal shielding layer 44 is copper tape.
The protective layer 5 comprises a filling layer 51, an inner protection layer 52, an isolation sleeve 53, an armor layer 54 and an outer protection layer 55 from inside to outside in sequence, wherein the filling layer 51 is made of polypropylene ropes; the inner protective layer 52 and the outer protective layer 55 are made of polyvinyl chloride; the isolation sleeve 53 is made of polytetrafluoroethylene; the material of the armor layer 54 is a steel tape.
Producing the modified polyvinyl chloride elastomer:
firstly, soaking glass fiber in a silane coupling agent KH550, keeping the temperature for 10min and continuously oscillating, then taking out the glass fiber, standing for 1-2h at room temperature, drying for 4h at 120 ℃, cooling for later use to obtain pretreated glass fiber, then adding polyvinyl chloride resin into a mixer, adding chlorinated polyvinyl chloride, calcium-zinc composite stabilizer, calcium carbonate, polyethylene wax and antioxidant, stirring for 10-15min at 90 ℃, adding the pretreated glass fiber, heating to 120 ℃, stirring for 8-10min, transferring to an extruder for extrusion to obtain a premix, placing the premix into an internal mixer for internal mixing for 10-15min at 170 ℃, and cooling to obtain the modified polyvinyl chloride elastomer.
Wherein the mass ratio of the glass fiber to the silane coupling agent KH550 is 150:300.
wherein the mass ratio of the polyvinyl chloride resin, the chlorinated polyvinyl chloride, the calcium-zinc composite stabilizer, the calcium carbonate, the polyethylene wax, the antioxidant and the pretreated glass fiber is 90-100:45-55:3-5:20-30:1-3:1-3:10-15.
Wherein the antioxidant is composed of an antioxidant 1076, an antioxidant 1010 and an antioxidant 168 according to a weight ratio of 1.5-2.5.
The production process of the embedded optical fiber temperature measurement integrated cable comprises the following steps:
s1, twisting a plurality of copper wire bundles and then twisting the copper wire bundles again to form a copper core conductor 3;
s1, twisting the optical fiber filling strips and 6 optical fibers in a 0+6 twisting mode to form an optical fiber bundle 11, extruding and wrapping a modified polyvinyl chloride elastomer on the outer side of the optical fiber bundle 11 to form a protective sleeve 12 to manufacture an optical fiber cable 1, and wrapping a plurality of strands of soft wires 2 on the outer side of the optical fiber cable 1 to form an embedded body 6;
s3, extruding and wrapping the conductor shielding layer 41, the XLPE insulating layer 42, the insulating shielding layer 43 and the embedded body 6 on the outer side of the copper core conductor 3 in a co-extrusion mode, wherein the embedded body 6 is laid in the middle of the insulating shielding layer 43 in a sine wave mode, and then extruding and wrapping the metal shielding layer 44 on the outermost side to obtain the optical fiber composite core;
s4, stranding 3 optical fiber composite cores into a cable, adding a polypropylene rope for filling, then wrapping an inner protection layer 52 and extruding an isolation sleeve 53, and finally sheathing and extruding an outer protection layer 55 to obtain the embedded optical fiber temperature measurement integrated cable.
Example 1
Producing an embedded optical fiber temperature measurement integrated cable:
preparing a modified polyvinyl chloride elastomer:
firstly, 150g of glass fiber is soaked in 300g of KH550 silane coupling agent, kept for 10min and continuously oscillated, then the glass fiber is taken out and placed at room temperature for 1h, dried for 4h at 120 ℃, cooled for standby use, to obtain pretreated glass fiber, then 900g of polyvinyl chloride resin is added into a mixer, 450g of chlorinated polyvinyl chloride, 30g of calcium-zinc composite stabilizer, 200g of calcium carbonate, 10g of polyethylene wax and 10g of antioxidant are added, after stirring for 10min at 90 ℃, 100g of pretreated glass fiber is added, the temperature is increased to 120 ℃, after stirring for 8min, the mixture is transferred into an extruder for extrusion, to obtain premix, the premix is placed into an internal mixer for internal mixing for 10min at 170 ℃, and the modified polyvinyl chloride elastomer is obtained after cooling.
Wherein the antioxidant is composed of an antioxidant 1076, an antioxidant 1010 and an antioxidant 168 according to a weight ratio of 1.5.
The production process of the embedded optical fiber temperature measurement integrated cable comprises the following steps:
s1, twisting 37 copper wire bundles of 2.52mm and then twisting again to form a copper core conductor 3;
s1, twisting a polypropylene strip and 6 optical fibers in a 0+6 twisting mode to form an optical fiber bundle 11, extruding and wrapping a modified polyvinyl chloride elastomer on the outer side of the optical fiber bundle 11 to form a protective sleeve 12 to manufacture an optical fiber cable 1, and wrapping a plurality of strands of paper ropes on the outer side of the optical fiber cable 1 to form an embedded body 6;
s3, extruding and wrapping the conductor shielding layer 41, the XLPE insulating layer 42, the insulating shielding layer 43 and the embedded body 6 on the outer side of the copper core conductor 3 in a co-extrusion mode, wherein the embedded body 6 is laid in the middle of the insulating shielding layer 43 in a sine wave mode, and then extruding and wrapping the metal shielding layer 44 on the outermost side to obtain the optical fiber composite core;
s4, stranding 3 optical fiber composite cores into a cable, adding a polypropylene rope for filling, then wrapping an inner protection layer 52 and extruding an isolation sleeve 53, and finally sheathing and extruding an outer protection layer 55 to obtain the embedded optical fiber temperature measurement integrated cable.
Example 2
Producing an embedded optical fiber temperature measurement integrated cable:
preparing a modified polyvinyl chloride elastomer:
firstly, 150g of glass fiber is soaked in 300g of KH550 silane coupling agent, kept for 10min and continuously oscillated, then the glass fiber is taken out and placed at room temperature for standing for 1h, dried for 4h at 120 ℃, cooled for standby use, so as to obtain pretreated glass fiber, then 1000g of polyvinyl chloride resin is added into a mixer, 550g of chlorinated polyvinyl chloride, 30g of calcium-zinc composite stabilizer, 300g of calcium carbonate, 30g of polyethylene wax and 30g of antioxidant are added, after stirring for 15min at 90 ℃, 150g of pretreated glass fiber is added, the temperature is increased to 120 ℃, after stirring for 10min, the mixture is transferred into an extruder for extrusion, so as to obtain premix, the premix is placed into an internal mixer for internal mixing for 15min at 170 ℃, and the modified polyvinyl chloride elastomer is obtained after cooling.
Wherein the antioxidant is composed of an antioxidant 1076, an antioxidant 1010 and an antioxidant 168 according to a weight ratio of 2.5.
The production process of the embedded optical fiber temperature measurement integrated cable comprises the following steps:
s1, twisting 37 copper wire bundles of 2.52mm and then twisting again to form a copper core conductor 3;
s1, twisting a polypropylene strip and 6 optical fibers in a 0+6 twisting mode to form an optical fiber bundle 11, extruding and wrapping a modified polyvinyl chloride elastomer on the outer side of the optical fiber bundle 11 to form a protective sleeve 12 to manufacture an optical fiber cable 1, and wrapping a plurality of strands of hemp ropes on the outer side of the optical fiber cable 1 to form an embedded body 6;
s3, extruding and wrapping the conductor shielding layer 41, the XLPE insulating layer 42, the insulating shielding layer 43 and the embedded body 6 on the outer side of the copper core conductor 3 in a co-extrusion mode, wherein the embedded body 6 is laid in the middle of the insulating shielding layer 43 in a sine wave mode, and then extruding and wrapping the metal shielding layer 44 on the outermost side to obtain the optical fiber composite core;
s4, stranding 3 optical fiber composite cores into a cable, adding a polypropylene rope for filling, then wrapping an inner protection layer 52 and extruding an isolation sleeve 53, and finally sheathing and extruding an outer protection layer 55 to obtain the embedded optical fiber temperature measurement integrated cable.
Compared with the traditional method in which a metal guide pipe is arranged and ointment is adopted for fixing, the protective layer 5 in the embedded optical fiber temperature measurement integrated cable is of a non-metal material and a dry structure, the electric field distribution of the cable is not influenced, the adverse influence on the electric power safe operation is avoided, meanwhile, the embedded optical fiber temperature measurement integrated cable is more suitable for the environmental requirements of cable construction and electric power operation, and a plurality of strands of paper ropes or hemp ropes are wound on the outer side of the optical fiber cable 1 in a wrapping mode and play a certain role in buffering and protecting.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing is merely exemplary and illustrative of the principles of the present invention and various modifications, additions and substitutions of the specific embodiments described herein may be made by those skilled in the art without departing from the principles of the present invention or exceeding the scope of the claims set forth herein.
Claims (9)
1. The embedded optical fiber temperature measurement integrated cable comprises a copper core conductor (3), an inner shielding layer (4) and a protective layer (5), and is characterized in that an optical fiber cable (1) is laid in the inner shielding layer (4);
the inner shielding layer (4) is sequentially provided with a conductor shielding layer (41), an XLPE insulating layer (42), an insulating shielding layer (43) and a metal shielding layer (44) from inside to outside; the optical fiber cable (1) is laid in the insulation shielding layer (43), and a plurality of strands of soft wires (2) are wound on the outer side of the optical fiber cable (1); the protective layer (5) is sequentially provided with a filling layer (51), an inner protective layer (52), an isolating sleeve (53), an armor layer (54) and an outer protective layer (55) from inside to outside.
2. The embedded optical fiber temperature measurement integrated cable of claim 1, wherein: the optical fiber cable (1) comprises an optical fiber bundle (11) and a protective sleeve (12) coated on the outer side of the optical fiber bundle (11), wherein the raw material of the protective sleeve (12) is prepared by the following steps:
adding polyvinyl chloride resin into a mixer, adding chlorinated polyvinyl chloride, a calcium-zinc composite stabilizer, calcium carbonate, polyethylene wax and an antioxidant, stirring for 10-15min at 90 ℃, adding pretreated glass fiber, heating to 120 ℃, stirring for 8-10min, transferring to an extruder for extrusion to obtain a premix, banburying the premix in an internal mixer at 170 ℃ for 10-15min, and cooling to obtain a raw material of the protective sleeve (12).
3. The embedded optical fiber temperature measurement integrated cable of claim 2, wherein: the mass ratio of the polyvinyl chloride resin, the chlorinated polyvinyl chloride, the calcium-zinc composite stabilizer, the calcium carbonate, the polyethylene wax, the antioxidant and the pretreated glass fiber is (90-100): 45-55:3-5:20-30:1-3:1-3:10-15.
4. The embedded optical fiber temperature measurement integrated cable of claim 2, wherein: the pretreatment steps are as follows: soaking the glass fiber in a silane coupling agent KH550, keeping for 10min and continuously oscillating, taking out the glass fiber, standing for 1-2h at room temperature, drying for 4h at 120 ℃, and cooling for later use.
5. The embedded optical fiber temperature measurement integrated cable of claim 2, wherein: the antioxidant is composed of an antioxidant 1076, an antioxidant 1010 and an antioxidant 168 according to a weight ratio of 1.5-2.5.
6. The embedded optical fiber temperature measurement integrated cable of claim 1, wherein: the soft wire (2) is a paper rope or a hemp rope.
7. The embedded optical fiber temperature measurement integrated cable of claim 1, wherein: the conductor shielding layer (41) and the insulation shielding layer (43) are made of semiconductor electric strips; the XLPE insulating layer (42) is made of cross-linked polyethylene; the metal shielding layer (44) is made of copper strip.
8. The embedded optical fiber temperature measurement integrated cable of claim 1, wherein: the filling layer (51) is made of polypropylene ropes; the inner protection layer (52) and the outer protection layer (55) are made of polyvinyl chloride; the isolation sleeve (53) is made of polytetrafluoroethylene; the material of the armor layer (54) is a steel belt.
9. The embedded optical fiber temperature measurement integrated cable of claim 1, wherein: the preparation method comprises the following steps:
s1, twisting a plurality of copper wire bundles and then twisting the copper wire bundles again to form a copper core conductor (3);
s1, forming an optical fiber bundle (11) after the optical fiber filling strip and 6 optical fibers are twisted, extruding and wrapping a protective sleeve (12) on the outer side of the optical fiber bundle (11) to manufacture an optical fiber cable (1), and wrapping a plurality of strands of soft wires (2) on the outer side of the optical fiber cable (1) to form an embedded body (6);
s3, extruding and wrapping the conductor shielding layer (41), the XLPE insulating layer (42), the insulating shielding layer (43) and the embedded body (6) on the outer side of the copper core conductor (3) in a co-extrusion mode, wherein the embedded body (6) is laid in the middle of the insulating shielding layer (43) in a sine wave mode, and then extruding and wrapping the metal shielding layer (44) on the outermost side to obtain the optical fiber composite core;
s4, stranding 3 optical fiber composite cores into a cable, adding a polypropylene rope for filling, then wrapping an inner protection layer (52) and extruding and wrapping an isolation sleeve (53), and finally armoring and extruding and wrapping an outer protection layer (55) to obtain the embedded optical fiber temperature measurement integrated cable.
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| CN115793168A (en) * | 2023-02-07 | 2023-03-14 | 安徽雷彻科技有限公司 | Method for manufacturing optical fiber conduit containing cladding optical fiber |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115793168A (en) * | 2023-02-07 | 2023-03-14 | 安徽雷彻科技有限公司 | Method for manufacturing optical fiber conduit containing cladding optical fiber |
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