CN112802628B - Compact intelligent sensing composite cable - Google Patents
Compact intelligent sensing composite cable Download PDFInfo
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- CN112802628B CN112802628B CN202110299304.2A CN202110299304A CN112802628B CN 112802628 B CN112802628 B CN 112802628B CN 202110299304 A CN202110299304 A CN 202110299304A CN 112802628 B CN112802628 B CN 112802628B
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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
- H01B7/32—Insulated conductors or cables characterised by their form with arrangements for indicating defects, e.g. breaks or leaks
- H01B7/324—Insulated conductors or cables characterised by their form with arrangements for indicating defects, e.g. breaks or leaks comprising temperature sensing means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/14—Supports; Fastening devices; Arrangements for mounting thermometers in particular locations
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
- G01K11/32—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in transmittance, scattering or luminescence in 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
- 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
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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
- H01B7/42—Insulated conductors or cables characterised by their form with arrangements for heat dissipation or conduction
- H01B7/428—Heat conduction
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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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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B9/00—Power cables
- H01B9/02—Power cables with screens or conductive layers, e.g. for avoiding large potential gradients
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Abstract
The invention discloses a compact intelligent sensing composite cable, wherein a conductor cable core consists of a central conductor and a tile-shaped conductor, a conductor shielding layer, an insulating layer and an insulating shielding layer are arranged outside the cable core, and communication optical fibers are inserted and arranged among metal wires of a metal wire shielding layer in a shielding structure; an isolation sleeve is arranged on the shielding structure, a steel wire armor layer is arranged outside the isolation sleeve, and a steel wire socket of the steel wire armor layer is provided with a temperature measuring optical fiber; the temperature measuring optical fiber comprises a temperature measuring fiber core, a temperature measuring cladding and a heat conducting layer, and heat conducting filling paste is filled between the heat conducting layer and the metal outer tube; the heat-conducting filling paste comprises the following components in percentage by weight: 18-20% of gelling agent, 3-5% of oil separation inhibitor, 1-2% of antioxidant, 2-2.5% of water absorbent, 0.0015-0.002% of defoaming agent and the balance of heat conducting oil. The cable can realize real-time intelligent monitoring of the operation condition of the power load of the cable, ensures synchronization of power supply, communication and online monitoring, and has the advantages of reasonable structure and reliable use.
Description
Technical Field
The invention belongs to the technical field of power cables, and particularly relates to a power cable which has the functions of electric energy and information transmission and can timely monitor the operation temperature.
Background
The power cable is used for transmitting and distributing electric energy, and is widely applied to urban underground power grids, railway power lines, power supplies inside industrial and mining enterprises and power transmission lines under river seawater. The application field of the power cable is continuously expanded, the laying environment of the power cable becomes more complex, the power cable develops from pure power and electric energy transmission to multifunctional and multipurpose directions, and if the power cable is required to have the functions of corrosion resistance, flame retardance, water resistance, moisture resistance and the like, the power cable is required to have the functions of transmitting power and communication information. Especially, with the development acceleration of smart grid construction, the intelligent construction of smart grids such as automatic control of a power distribution network, remote acquisition of power transmission information, online detection of cable running conditions, and bidirectional interaction between a power grid and power consumers, requires the development of power information communication towards high speed, reliability and safety.
With the rapid development of high-speed rail construction, the number of power cables applied to railway power supply lines is increasing day by day, and the working operation state of the power cables determines the power supply quality and the power supply safety to a great extent. The method has the advantages of preventing cable faults, reducing the fault rate of the cable in operation, improving the reliability of power supply of the cable, and being particularly important for safe and efficient operation of railways. The intelligent railway is the inevitable trend of the scientific and technological development of the railways in the world nowadays, the modern information technology and the artificial intelligence technology are also accelerated to be fused with the railway industry, and under the condition, the power cable used for the railway power supply system not only provides energy for the trains, but also needs to transmit various operation and power information communication.
The design of a cable core conductor in the power cable is an important link of the cable structure design, and the reasonable conductor structure design can not only contribute to improving the quality of the power cable, but also reduce the consumption of cable materials. In the existing power cable, a cable core is mostly formed by twisting a plurality of conductor single wires, and a loose cable structure is formed by more gaps among the conductors of the cable core, so that the using amount of filling materials is increased, the using amounts of wrapping tape, armor and sheath materials are increased, and the workload of laying the cable is increased; the curvature radius of the section of the special-shaped conductor at the edge of the single conductor is too small, so that the electric field at the position is concentrated, and the voltage resistance level of the cable is reduced.
In a large number of power cables applied to a railway power supply system, cable cores of the cables generate heat under the action of self-resistance through large current, and the longer the time and the higher the temperature are, the larger the resistance is, the more the heat is generated easily, which not only causes power transmission loss, but also causes insulation material degradation, cable damage and even fire and other safety accidents, so that the operating temperature of the cables is an extremely important parameter for representing the operating state of the power cables, and when the cables break down, the temperature value near the fault point also rises or falls. Because the power cable is often buried and has great concealment, great difficulty is brought to the detection of faults and the accurate positioning of distances. The method attaches importance to the fault detection and diagnosis of the power cable, accurately positions the fault point of the power cable by using an advanced detection technology, maintains the power cable in time, makes safety protection measures and is extremely important to the overall operation of a power system. In addition, due to the rapid development of electronic information technology, the power cable diagnosis and detection technology is inevitably developed in the direction of digitization, intellectualization and automation. Therefore, the power cable should have an intelligent cable with a communication optical fiber and a power cable combined together, so that a power supply line and an information communication network line are laid synchronously, power supply, communication and online monitoring are carried out synchronously, and the aim of one cable with multiple purposes is fulfilled.
Disclosure of Invention
The invention aims to solve the technical problem of providing a compact intelligent sensing composite cable, which not only can realize the safe transmission of electric energy, but also can realize the reliable operation of a temperature measurement optical fiber unit and a communication optical fiber unit so as to ensure that the optical fiber transmission performance is not influenced by power transmission, realize the real-time intelligent monitoring of the power load operation condition of the cable, ensure the synchronization of power supply, communication and online monitoring, has compact structure and reduces the cable cost.
In order to solve the technical problems, the compact intelligent sensing composite cable comprises a conductor cable core, wherein a conductor shielding layer, an insulating layer and an insulating shielding layer are sequentially arranged outside the conductor cable core, the conductor cable core is composed of a central conductor and tile-shaped conductors, the central conductor is positioned at the central position of the conductor cable core, a plurality of tile-shaped conductors are sequentially arranged around the central conductor, the radius of the central conductor is R, the radius of the inner arc of each tile-shaped conductor is R1, the radius of the outer arc of each tile-shaped conductor is R2, R1 is (0.05-0.065) R, and R2 is (0.10-0.12) R; the shielding structure is arranged on the periphery of the insulating shielding layer and comprises a metal wire shielding layer positioned on an inner layer and a metal belt shielding layer positioned on an outer layer, the metal wire shielding layer is formed by arranging a plurality of metal wires on the peripheral surface of the insulating shielding layer at intervals, and at least one communication optical fiber is inserted between the metal wires of the metal wire shielding layer; the shielding structure is provided with an isolation sleeve, the periphery of the isolation sleeve is provided with a steel wire armor layer, the steel wire armor layer is formed by arranging a plurality of steel wires on the peripheral surface of the isolation sleeve, and at least one temperature measuring optical fiber is inserted and arranged between the steel wires of the steel wire armor layer; a steel wire armor layer is provided with a wrapping tape layer, an inner sheath is arranged on the wrapping tape layer, and an outer sheath is arranged on the inner sheath; the communication optical fiber comprises a communication fiber core and a communication cladding coated outside the communication fiber core, wherein a metal corrugated pipe is sleeved on the communication cladding at intervals, filling factice is filled between the communication cladding and the metal corrugated pipe, an inner sleeve is sleeved outside the metal corrugated pipe at intervals, silica gel is filled between the metal corrugated pipe and the inner sleeve, an armor steel wire is embedded in the silica gel, the armor steel wire is arranged along the length direction of the communication fiber core, a heat insulation coating is arranged outside the inner sleeve, and an outer sleeve is sleeved on the heat insulation coating; the temperature measuring optical fiber comprises a temperature measuring fiber core and a temperature measuring cladding coated outside the temperature measuring fiber core, the temperature measuring cladding is coated with a heat conducting layer, a metal outer pipe is sleeved on the periphery of the heat conducting layer at intervals, and heat conducting filling paste is filled between the heat conducting layer and the metal outer pipe; the heat-conducting filling paste comprises the following components in percentage by weight: 18-20% of gelling agent, 3-5% of oil separation inhibitor, 1-2% of antioxidant, 2-2.5% of water absorbent, 0.0015-0.002% of defoaming agent and the balance of heat conducting oil; the ratio of the thickness of the insulating layer to the rated voltage is 0.4 mm/kV-0.45 mm/kV; the cross-sectional area of the shielding structure being 45 mm-55 mm.
Due to the adoption of the technical scheme, the invention has the following remarkable advantages:
the cable core is composed of a central conductor and tile-shaped conductors, the cable core structure is more stable, the geometric dimension of the cross section of the cable core is minimum, the structure is compact, filling materials of the cable core are saved, the material consumption of a cable wrapping belt, armoring, a sheath and the like is greatly reduced, the cable cost is saved, and the cable construction is convenient; the inner arc radius and the outer arc radius of the tile-shaped conductor are controlled within a reasonable range, so that the compression degree of a cable core is stabilized, the electric field distribution is uniform, the electric field concentration is reduced, and the voltage resistance level of the cable is improved.
The communication optical fiber is inserted and arranged in the metal wire shielding layer of the cable, the development of electric power information to a safe and reliable direction can be realized through the communication optical fiber, the functions of automatic control of a power grid, remote acquisition of electric power transmission information and the like are facilitated, the intelligent construction requirement of the power grid is met, the synchronous operation of a power supply line and an information communication network can also be realized through the communication optical fiber, and the manufacturing, maintenance and laying cost of the cable is reduced. Meanwhile, an optical fiber posture stabilizing structure and a multi-layer heat insulation protection structure are adopted on the outer layer of the communication optical fiber, a metal corrugated pipe is arranged on the inner layer of the communication optical fiber structure unit to protect the optical fiber, armored steel wires and filled silica gel around the metal corrugated pipe are used for maintaining the stable optical fiber posture, and when the communication optical fiber is bent along with a cable, the optical fiber circuit structure unit can keep enough bending rate and stable optical fiber posture by taking the metal corrugated pipe as a bending center, so that polarized light is prevented from being generated; the filled silica gel provides good vibration damping effect and supporting effect, and ensures the position stability of the metal corrugated pipe and the armored steel wire; the inner and outer sheaths and the heat insulation layer between the inner and outer sheaths not only have good heat insulation effect on the optical fiber, but also improve the mechanical properties of the optical fiber unit, such as tensile strength, extrusion resistance and the like.
According to the invention, the temperature measuring optical fiber is inserted and arranged in the steel wire armor layer, the temperature measuring optical fiber can accurately monitor the operating temperature of the cable, large-range and multi-point temperature measurement is realized, the accuracy is higher, automatic measurement and online temperature monitoring can be realized, and the intelligent management of the cable is facilitated; the outer protective layer of the temperature measurement optical fiber unit adopts the heat conduction structure and the sheath structure, the sheath structure effectively enhances the mechanical properties of tensile strength, compression resistance and the like of the optical fiber, and forms a reliable and stable protection function, particularly, the heat conduction layer and the heat conduction filling paste in the heat conduction structure improve the heat conduction effect of the optical fiber sheath, and enhance the heat sensitivity and the monitoring sensitivity of the optical fiber, and the heat conduction oil has good heat conduction performance, so that the optical fiber is uniformly heated, the temperature measurement data is more accurate, water and moisture are effectively prevented from permeating into the inner part, the transmission loss of the optical fiber is effectively avoided, and the temperature monitoring quality and the service life of the optical fiber are ensured. The heat-conducting filling paste meets the requirements of good heat conductivity, and simultaneously has good mechanical properties of vibration reduction, bending resistance, tensile resistance and the like for the optical fiber, and has double technical effects of heat conduction and protection.
According to the invention, the inner and outer double-layer sheath structures are adopted on the cable wrapping tape layer, and the outer sheath of the cable with the double-layer sheath structure can be made of sheath materials with different properties, so that the cable has multiple protection functions and can be suitable for various severe use environments. The low-smoke halogen-free flame-retardant polyolefin material is adopted as the inner sheath, so that the cable has high insulating mechanical strength and excellent thermal stability, and has excellent flame-retardant, fireproof and environment-friendly properties; the nylon is used as the outer sheath, so that the cable has the mouse-proof, mosquito-proof and waterproof performances, and also has the performances of wear resistance, corrosion resistance, oil resistance and the like, therefore, the multi-layer sheath structure is adopted, the comprehensive performance of the cable is greatly enhanced, and the cable can be suitable for various severe application environments.
The ratio of the insulation thickness of the cable core conductor to the rated voltage is controlled to be 0.4 mm/kV-0.45 mm/kV, the cable insulation breakdown is easily caused by the excessively thin insulation thickness, the cable insulation effect is lost, and the power transmission accident is caused, the laying difficulty and the cable cost of the cable are increased by the excessively thick insulation layer thickness, the dissipation of the cable operation heat is not facilitated, the electric energy transmission efficiency is reduced, and the laying space of the cable is increased. The cable insulation thickness is reasonably controlled within a certain numerical range according to the rated voltage of the cable, so that the cable has better insulation safety, electric energy transmission efficiency and cable cost.
According to the invention, the cross-sectional area of the cable shielding structure is controlled within 45-55 mm, when the power cable transmits electric energy, a magnetic field generated by conductor current under the action of an alternating electric field is connected with the metal shielding layer to generate induced electromotive force on the shielding layer, and loop current is formed on the metal shielding layer, so that the shielding layer loss is generated due to the part of loop current, the metal shielding layer loss is increased due to the increase of the resistance of the metal shielding layer, the heat productivity of the cable is increased, and the current carrying capacity of the cable is reduced, and therefore, the shielding layer loss can be effectively reduced by reasonably controlling the resistance value of the metal shielding layer. Although the increase of the cross section area of the shielding layer can effectively reduce the shielding resistance, the unreasonable cross section area can increase the weight and cost of the cable and also make the cable difficult to lay and install, so the cross section area of the shielding layer must be controlled within a proper range to achieve the technical effects of reducing loss and heat and improving the current-carrying capacity of the cable.
In a preferred embodiment of the present invention, the central conductor is a circular conductor, at least one layer of tile-shaped conductors is arranged on the outer periphery of the central conductor, and R1 is 0.06R and R2 is 0.11R. The cable core has compact structure, uniform electric field of the conductor and enhanced voltage resistance level.
In a preferred embodiment of the present invention, two communication optical fibers are inserted and arranged between a plurality of metal wires constituting the metal wire shielding layer; two temperature measuring optical fibers are arranged among a plurality of steel wires forming the steel wire armor layer in an inserting way. The steel wires of the steel wire armor layer are arranged adjacently and sequentially, and the temperature measuring optical fiber is positioned between the two adjacent steel wires. The metal wires of the metal wire shielding layer are wound on the insulating shielding layer at intervals, and the metal foil of the metal tape shielding layer is wound on the metal wire shielding layer with gaps. It is rational in infrastructure, can ensure the reliable steady operation of communication optical fiber unit and temperature measurement optic fibre.
In a further embodiment of the present invention, the cross-sectional area of the shielding structure is the product of the cross-sections of the wire shielding layer and the metal tape shielding layer on the same cross-section, which is perpendicular to the cable axis. And accurately controlling the resistance value of the shielding layer.
In a preferred embodiment of the present invention, the heat conductive filling paste comprises the following components by weight: 72% of heat conduction oil, 20% of gelling agent, 4% of oil separation inhibitor, 1.5% of antioxidant, 0.0018% of defoaming agent and the balance of water absorbent. The heat conduction oil is synthetic heat conduction oil, the gelling agent is fumed silica, the antioxidant is an alkylphenol antioxidant, the oil separation inhibitor is ethylene propylene rubber or a diblock polymer, the water absorbent is silica gel, and the defoaming agent is emulsified silicone oil. Has good heat transfer performance and heat conduction effect.
In a further embodiment of the present invention, the metal corrugated pipe is a stainless steel corrugated pipe, and the armor wires are arranged at intervals on an outer circumferential surface of the metal corrugated pipe, and the armor wires are low carbon steel wires. The inner sleeve and the outer sleeve are made of polyolefin materials, and the heat insulation layer is formed by wrapping glass fiber cloth. The structure can ensure the position stability of the optical fiber unit and has good heat resistance and heat insulation performance.
Drawings
The compact intelligent sensing composite cable of the present invention is further described in detail with reference to the accompanying drawings and the detailed description.
FIG. 1 is a schematic cross-sectional view of one embodiment of the compact smart composite cable of the present invention;
FIG. 2 is an enlarged cross-sectional view of the center conductor and the tegular conductor of the structure of FIG. 1;
FIG. 3 is a schematic cross-sectional view of the optical communication fiber of the structure of FIG. 1;
FIG. 4 is a schematic cross-sectional view of the temperature measuring fiber in the structure of FIG. 1.
In the figure, 1-conductor cable core, 101-center conductor, 102-tile-shaped conductor, 2-conductor shielding layer, 3-insulating layer, 4-insulating shielding layer, 5-shielding structure, 51-metal wire shielding layer, 52-metal tape shielding layer, 6-communication optical fiber, 61-communication fiber core, 62-communication cladding, 63-filling ointment, 4-metal corrugated pipe, 65-armored steel wire, 66-silica gel, 67-inner sleeve, 68-thermal insulation layer, 69-outer sleeve, 7-isolation sleeve, 8-steel wire armor layer, 9-temperature-measuring optical fiber, 91-temperature-measuring fiber core, 92-temperature-measuring cladding, 93-heat-conducting layer, 94-heat-conducting filling ointment, 95-metal outer pipe, 10-wrapping tape layer, 11-inner sleeve, 12-outer sleeve, R-radius of center conductor, R1-radius of inner arc of tile-shaped conductor, and R2-radius of outer arc of tile-shaped conductor.
Detailed Description
The compact intelligent sensing composite cable shown in fig. 1 comprises a conductor cable core 1, wherein a conductor shielding layer 2, an insulating layer 3 and an insulating shielding layer 4 are sequentially coated on the periphery of the conductor cable core 1 from inside to outside, the conductor shielding layer 2 and the insulating shielding layer 4 are formed by extruding peroxide cross-linked semi-conductive shielding materials, the insulating layer 3 is formed by extruding peroxide cross-linked polyethylene insulating materials, and the conductor shielding layer 2, the insulating layer 3 and the insulating shielding layer 4 are realized by adopting a three-layer co-extrusion coating process. The conductor shielding layer 2 and the insulation shielding layer 4 have the functions of homogenizing an electric field and stabilizing the performance of the cable. In order to maintain the cable with a safe and reasonable cable insulation strength, the thickness b of the insulating layer 3 is related to the rated voltage (kV) of the cable, in this embodiment the thickness b =11mm of the insulating layer 3, the rated voltage of the cable is 27.5kV, and the ratio of the thickness of the insulating layer 3 to the rated voltage is 0.44 mm/kV.
The conductor cable core 1 is composed of a central conductor 101 and a tile-shaped conductor 102, wherein the central conductor 101 and the tile-shaped conductor 102 are both copper monofilaments, the cross section of the central conductor 101 is circular, and the cross section of the tile-shaped conductor 102 is tile-shaped. As shown in fig. 2, the central conductor 101 is located at the center of the conductor cable 1, and three layers of the pad-shaped conductors 102, one layer of which is provided with 6 pad-shaped conductors 102, two layers of which are provided with 12 pad-shaped conductors 102, and three layers of which are provided with 18 pad-shaped conductors 102 are arranged on the outer periphery of the central conductor 10 in this order, thereby forming a 1+6+12+18 cable core structure. The radius R of the central conductor 101 is 2.6mm, the radius of the inner arc of the tile-shaped conductor 102 is R1 0.06R 0.156mm, the radius of the inner arc of the tile-shaped conductor 102 is R1 0.06R 0.156mm, and the radius of the outer arc of the tile-shaped conductor 102 is R2 0.11R 0.286 mm; preferably, the inner arc radius R1 of the corrugated conductor 102 is (0.05-0.065) R and the outer arc radius R2 of the corrugated conductor 102 is (0.10-0.12) R.
And a shielding structure 5 is arranged on the insulating shielding layer 4, the shielding structure 5 comprises a metal wire shielding layer 51 positioned on the inner layer and a metal belt shielding layer 52 positioned on the outer layer, and the metal wire shielding layer 51 and the metal belt shielding layer 52 form a double-layer shielding structure. The metal wire shielding layer 51 is formed by arranging a plurality of copper wires around the periphery of the insulating shielding layer 4 at intervals, the diameter of each copper wire conductor is 0.95mm, and the interval distance between every two adjacent copper wire conductors is 4 mm; the metal tape shield layer 52 is formed by winding a copper foil around the wire shield layer 51 with a gap therebetween. The sum of the sectional areas of the wire shielding layer 51 and the metal tape shielding layer 52 on the same section of the cable is the sectional area of the shielding structure 5, the section is perpendicular to the cable axis, and the sectional area of the shielding structure 5 is 50 mm. Two communication optical fibers 6 are inserted between adjacent copper wires of the metal wire shielding layer 51, the two communication optical fibers 6 are positioned on the same diameter of the cable, and the diameter of the communication optical fibers 6 is equivalent to that of the copper wires of the metal shielding layer 51.
The shielding structure is characterized in that a spacer sleeve 7 is arranged on the periphery of the shielding structure 5, the spacer sleeve 7 is formed by extruding low-smoke halogen-free flame-retardant polyolefin materials and has the flame-retardant and waterproof effects, a steel wire armor layer 8 is arranged on the periphery of the spacer sleeve 7, and the steel wire armor layer 8 is formed by arranging a plurality of carbon steel wires with the diameter of 3.5mm on the periphery of the spacer sleeve 7 without intervals. Two temperature measuring optical fibers 9 are arranged between the carbon steel wires of the steel wire armor layer 8 in an inserting way, and the two temperature measuring optical fibers 9 are positioned on the same diameter of the cross section of the cable.
A wrapping tape layer 10 is arranged on the steel wire armor layer 8, and the wrapping tape layer 10 is formed by wrapping a semi-conductive water-blocking tape and has water-blocking, isolating and shielding effects. An inner sheath 11 is arranged on the wrapping tape layer 10, and an outer sheath 12 is arranged on the inner sheath 11; the inner sheath 11 is extruded by low-smoke halogen-free flame-retardant polyolefin material, and the outer sheath 12 is extruded by nylon material.
As shown in fig. 3, the communication optical fiber 6 includes a communication core 61, a communication cladding 62 is coated on the communication core 61, a metal corrugated pipe 64 is sheathed on the outer periphery of the communication cladding 62 at intervals, the metal corrugated pipe 64 is a stainless steel corrugated pipe, a filling ointment 63 is filled between the communication cladding 62 and the metal corrugated pipe 64, and the filling ointment 63 is a commonly used optical fiber filling ointment. An inner sleeve 67 is sleeved on the outer periphery of the metal corrugated pipe 64 at intervals, silica gel 66 is filled between the metal corrugated pipe 64 and the inner sleeve 67, armor wires 65 are embedded in the silica gel 66, the armor wires 65 are arranged on the outer periphery of the metal corrugated pipe 64 at intervals, and the armor wires 65 are low-carbon steel wires. The armored steel wire 65 is arranged along the length direction of the communication fiber core 61, a heat insulation coating 68 is arranged outside the inner sleeve 67, an outer sleeve 69 is sleeved on the heat insulation coating 68, the inner sleeve 67 and the outer sleeve 69 are both formed by extruding olefin materials, and the heat insulation layer 68 between the inner sleeve 67 and the outer sleeve 69 is formed by wrapping glass fiber cloth.
As shown in fig. 4, the temperature measuring optical fiber 9 includes a temperature measuring fiber core 91, a temperature measuring cladding 92 is coated outside the temperature measuring fiber core 91, a heat conducting layer 93 is coated on the temperature measuring cladding 92, the heat conducting layer 93 is formed by coating heat conducting silica gel, a metal outer tube 95 is sleeved on the outer periphery of the heat conducting layer 93 at intervals, the metal outer tube 95 is a copper corrugated tube, and a heat conducting filling paste 94 is filled between the metal outer tube 95 and the heat conducting layer 93.
The heat-conducting filling paste 94 is prepared from the following components, and the examples are as follows:
the first embodiment is as follows: the heat-conducting filling paste 94 comprises the following components in percentage by weight: 72% of heat conduction oil, 20% of gelling agent, 4% of oil separation inhibitor, 1.5% of antioxidant, 0.0018% of defoaming agent and the balance of water absorbent. The heat conducting oil is synthetic heat conducting oil, the gelatinizing agent is fumed silica, the antioxidant is an alkylphenol antioxidant, the oil separating inhibitor is ethylene propylene rubber or water absorbent is silica gel, and the defoaming agent is emulsified silicone oil.
Example two: the heat-conducting filling paste 94 comprises the following components in percentage by weight: 72.5 percent of heat conduction oil, 18 percent of gelling agent, 5 percent of oil separation inhibitor, 2 percent of antioxidant, 0.002 percent of defoaming agent and the balance of water absorbent. The heat conducting oil is synthetic heat conducting oil, the gelatinizing agent is fumed silica, the antioxidant is an alkylphenol antioxidant, the oil separating inhibitor is a double-block high polymer, the water absorbent is silica gel, and the defoaming agent is emulsified silicone oil.
Some preferred embodiments of the present invention have been described above, but the present invention is not limited to the above-described embodiments, and many modifications and changes can be made without departing from the basic principle of the present invention. If the communication optical fibers inserted and arranged in the metal wire shielding layer are not limited to two, one, three, four and the like, the temperature measuring optical fibers 9 inserted and arranged in the steel wire armor layer are also not limited to two, and one, three or four and the like; the communication optical fiber can also be inserted and arranged in the steel wire armor layer, the temperature measuring optical fiber can also be inserted and arranged in the metal wire shielding layer, or both the communication optical fiber and the temperature measuring optical fiber are inserted and arranged in the metal wire shielding layer or the steel wire armor layer; the coating layer outside the conductor cable core 1 is not limited to the above-mentioned embodiments, and other functional coating layers may be inserted between the layers according to the use requirements and environment of the cable, and so on. Such modifications and variations are intended to fall within the scope of the present invention.
Claims (10)
1. The utility model provides a compact intelligent perception composite cable, includes conductor cable core (1), has set gradually conductor shielding layer (2), insulating layer (3) and insulation shielding layer (4) outside conductor cable core (1), its characterized in that: the conductor cable core (1) is composed of a central conductor (101) and tile-shaped conductors (102), the central conductor (101) is located at the center of the conductor cable core (1), the tile-shaped conductors (102) are sequentially arranged around the central conductor (101), the radius of the central conductor (101) is R, the radius of an inner arc of each tile-shaped conductor (102) is R1, the radius of an outer arc of each tile-shaped conductor (102) is R2, R1 is (0.05-0.065) R, and R2 is (0.10-0.12) R; the shielding structure (5) is arranged on the periphery of the insulating shielding layer (4), the shielding structure (5) comprises a metal wire shielding layer (51) positioned on an inner layer and a metal belt shielding layer (52) positioned on an outer layer, the metal wire shielding layer (51) is formed by arranging a plurality of metal wires on the peripheral surface of the insulating shielding layer (4) at intervals, and at least one communication optical fiber (6) is inserted and arranged between the metal wires of the metal wire shielding layer (51); the shielding structure (5) is provided with an isolation sleeve (7), the periphery of the isolation sleeve (7) is provided with a steel wire armor layer (8), the steel wire armor layer (8) is formed by arranging a plurality of steel wires on the peripheral surface of the isolation sleeve (7), and at least one temperature measuring optical fiber (9) is inserted between the steel wires of the steel wire armor layer (8); a wrapping tape layer (10) is arranged on the steel wire armor layer (8), an inner sheath (11) is arranged on the wrapping tape layer (10), and an outer sheath (12) is arranged on the inner sheath (11); the communication optical fiber (6) comprises a communication fiber core (61) and a communication cladding (62) coated outside the communication fiber core (61), wherein metal corrugated pipes (64) are sleeved on the communication cladding (62) at intervals, filling factice (63) is filled between the communication cladding (62) and the metal corrugated pipes (64), inner sleeves (67) are sleeved outside the metal corrugated pipes (64) at intervals, silica gel (66) is filled between the metal corrugated pipes (64) and the inner sleeves (67), armor steel wires (65) are embedded in the silica gel (66), the armor steel wires (65) are arranged along the length direction of the communication fiber core (61), a heat insulation coating (68) is arranged outside the inner sleeves (67), and an outer sleeve (69) is sleeved on the heat insulation coating (68); the temperature measuring optical fiber (9) comprises a temperature measuring fiber core (91) and a temperature measuring cladding (92) coated outside the temperature measuring fiber core (91), the temperature measuring cladding (92) is coated with a heat conducting layer (93), a metal outer pipe (95) is sleeved on the periphery of the heat conducting layer (93) at intervals, and heat conducting filling paste (94) is filled between the heat conducting layer (93) and the metal outer pipe (95); the heat-conducting filling paste (94) comprises the following components in percentage by weight: 18-20% of gelling agent, 4-5% of oil separation inhibitor, 1-2% of antioxidant, 2-2.5% of water absorbent, 0.0015-0.002% of defoaming agent and the balance of heat conducting oil; the ratio of the thickness of the insulating layer (3) to the rated voltage is 0.4 mm/kV-0.45 mm/kV; the cross-sectional area of the shielding structure (5) being 45 mm-55 mm.
2. The compact smart aware composite cable of claim 1, wherein: the central conductor (101) is a circular conductor, at least one layer of tile-shaped conductors (102) is arranged on the periphery of the central conductor (101), and R1 is 0.06R, and R2 is 0.11R.
3. The compact smart aware composite cable of claim 1, wherein: two communication optical fibers (6) are arranged among a plurality of metal wires forming the metal wire shielding layer (51) in an inserting way; two temperature measuring optical fibers (9) are inserted among a plurality of steel wires forming the steel wire armor layer (8).
4. The compact smart aware composite cable of claim 2, wherein: the steel wires of the steel wire armor layer (8) are arranged in sequence and adjacent to each other, and the temperature measuring optical fiber (9) is located between the two adjacent steel wires.
5. The compact smart aware composite cable of claim 2, wherein: the metal wires of the metal wire shielding layer (51) are wound on the insulating shielding layer (4) at intervals, and the metal foil of the metal tape shielding layer (52) is wound on the metal wire shielding layer (51) with a gap.
6. The compact smart aware composite cable of claim 1, wherein: the cross-sectional area of the shielding structure (5) is the sum of the cross sections of the metal wire shielding layer (51) and the metal belt shielding layer (52) on the same cross section, and the cross section is perpendicular to the axis of the cable.
7. The compact smart aware composite cable of claim 1, wherein: the heat-conducting filling paste (94) comprises the following components in percentage by weight: 72% of heat conduction oil, 20% of gelling agent, 4% of oil separation inhibitor, 1.5% of antioxidant, 0.0018% of defoaming agent and the balance of water absorbent.
8. The compact smart aware composite cable of claim 1 or 6, wherein: the heat conduction oil is synthetic heat conduction oil, the gelling agent is fumed silica, the antioxidant is an alkylphenol antioxidant, the oil separation inhibitor is ethylene propylene rubber or a diblock polymer, the water absorbent is silica gel, and the defoaming agent is emulsified silicone oil.
9. The compact smart aware composite cable of claim 1, wherein: the metal corrugated pipe (64) is a stainless steel corrugated pipe, the armor steel wires (65) are arranged on the outer peripheral surface of the metal corrugated pipe (64) at intervals, and the armor steel wires (65) are low-carbon steel wires.
10. The compact smart aware composite cable of claim 1, wherein: the inner sleeve (67) and the outer sleeve (69) are made of polyolefin materials, and the heat-insulating coating (68) is formed by wrapping glass fiber cloth.
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| CN2020104213869 | 2020-05-18 | ||
| CN202010421386.9A CN111477398A (en) | 2020-05-18 | 2020-05-18 | Intelligent sensing photoelectric composite cable |
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| CN202110299304.2A Active CN112802628B (en) | 2020-05-18 | 2021-03-21 | Compact intelligent sensing composite cable |
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| CN113113174A (en) * | 2021-02-22 | 2021-07-13 | 深圳市壹电电力技术有限公司 | Cable with fault self-diagnosis function for intelligent cable system |
| CN114005582A (en) * | 2021-10-28 | 2022-02-01 | 中天科技海缆股份有限公司 | Dynamic submarine cable, and preparation method and device thereof |
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| CN2842458Y (en) * | 2005-08-02 | 2006-11-29 | 江苏通光信息有限公司 | Anti-mouse-bite soft optical-cable |
| CN102005263B (en) * | 2009-08-31 | 2012-04-04 | 上海鸿辉光通材料有限公司 | Flame-retardant fiber filling gel for optical cable and preparation method thereof |
| CN202142340U (en) * | 2011-05-21 | 2012-02-08 | 无锡市明珠电缆有限公司 | Track traffic middling pressure power cable |
| CN203812634U (en) * | 2014-04-21 | 2014-09-03 | 远东电缆有限公司 | Intelligent cable for subway |
| CN205751660U (en) * | 2016-05-06 | 2016-11-30 | 国网安徽省电力公司亳州供电公司 | A kind of intelligent power cable gathered multi-function in integral whole |
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