CN212675966U - Intelligent sensing photoelectric composite cable - Google Patents

Abstract

The utility model discloses an intelligent sensing photoelectric composite cable, wherein a conductor shielding layer, an insulating layer and an insulating shielding layer are arranged outside a cable core, and at least one communication optical fiber is inserted between metal wires of the metal wire shielding layer in a shielding structure; the shielding structure is provided with an isolation sleeve, the periphery of the isolation sleeve is provided with a steel wire armor layer, and at least one temperature measuring optical fiber is inserted between steel wires of the steel wire armor layer; 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 the synchronization of power supply, communication and on-line monitoring, and has the advantages of reasonable structure and reliable use.

Description

Intelligent sensing photoelectric composite cable

Technical Field

The utility model belongs to the technical field of power cable, especially, relate to a have electric energy and information transfer concurrently and can in good time monitor operating temperature's power cable.

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 cable core of the cable can generate heat under the action of self resistance through larger current, and the longer the time and the higher the temperature, the higher the resistance and the easier the heating, which not only causes power transmission loss, but also causes insulation material degradation, cable damage and even fire and other safety accidents, so the operating temperature of the cable is an extremely important parameter for representing the operating state of the power cable, and when the cable breaks 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.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that an intelligence perception photoelectricity composite cable is provided, can not only realize the safety transmission of electric energy, can realize temperature measurement optical fiber unit and communication optical fiber unit's reliable operation moreover to guarantee that optical fiber transmission performance is not influenced by power transmission, realize the real-time intelligent monitoring of cable power load operational aspect, guarantee power supply, communication and on-line monitoring's synchronization, and have rational in infrastructure, use reliably.

In order to solve the technical problem, the utility model discloses an intelligent perception photoelectricity composite cable, including the conductor cable core, this conductor cable core is formed by the transposition of a plurality of metallic conductor monofilament, has set gradually conductor shield, insulating layer and insulation shielding layer outside the conductor cable core, insulation shielding layer periphery is provided with shielding structure, and this shielding structure includes the metallic wire shielding layer that is located the inlayer and the metallic tape shielding layer that is located the skin, and the metallic wire shielding layer is arranged on the outer peripheral face of insulation shielding layer and constitutes by a plurality of metallic wires with mutual interval, has inserted a communication fiber at least between the metallic wire of metallic 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 utility model has the advantages of it is following showing:

at first the utility model discloses the socket has communication optical fiber in the wire shielding layer of cable, has both realized the development of electric power information to safe and reliable's direction through this communication optical fiber, is favorable to functions such as the automatic control and the power transmission information remote acquisition of electric wire netting, satisfies the intelligent construction needs of electric wire netting, and this communication optical fiber also can realize the synchronous operation of power supply line and information communication network, reduces the manufacturing of cable, maintains and lays the cost. 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.

The utility model discloses the temperature measurement optic fibre is arranged in inserting in the steel wire armor, and this temperature measurement optic fibre can accurately monitor cable operating temperature, realizes the temperature measurement of large scale, multiple spot, and the precision is higher, can realize automatic measurement and on-line temperature monitoring, is favorable to the intelligent management of cable; the utility model discloses well temperature measurement optical fiber unit's outer jacket has adopted heat conduction structure and sheath structure, sheath structure has strengthened mechanical properties such as tensile resistance to compression of optic fibre effectively, reliable stable protect function has been formed, especially heat-conducting layer and heat conduction filling paste among the heat conduction structure have improved the heat conduction effect of optic fibre sheath, strengthen the thermal sensitivity and the monitoring sensitivity of optic fibre, its heat-conducting oil not only has good heat conductivility, it is even also to make optic fibre be heated, temperature measurement data is more accurate, and water and moisture infiltration inside have been prevented effectively, avoid the optical fiber transmission loss effectively, ensure the temperature monitoring quality and the life of optic fibre. 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.

The utility model discloses adopt inside and outside two-layer double-deck sheath structure on the cable is around the band layer, this double-deck sheath structure cable oversheath can adopt the sheath material that has different properties, not only makes the cable have multiple protect function, also makes the cable can adapt to various abominable service environment moreover. 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 utility model discloses control the insulation thickness of cable core conductor and rated voltage between 0.4 mm/kV-0.45 mm/kV, too thin insulation thickness causes cable insulation breakdown easily, makes the cable insulation effect lose, causes the power transmission accident, and too thick insulation layer thickness not only can increase laying the degree of difficulty and the cable cost of cable, also does not benefit to giving off of cable operation heat, reduces electric energy transmission efficiency, still increased laying the space of cable. 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.

The utility model discloses with cable shielding structure's cross sectional area control in 45 mm-55 mm, power cable is when transmitting the electric energy, the magnetic field that conductor current produced links to each other with the metallic shield layer under the alternating electric field effect and produces induced electromotive force at the shielding layer to form loop current at the metallic shield layer, this part circulation causes the production of shielding layer loss, and metallic shield layer resistance's increase, its metallic shield layer loss also increases thereupon, and arouse the increase of cable calorific capacity and the reduction of current-carrying capacity, consequently reasonable control metallic shield layer resistance value can reduce the shielding layer loss effectively. 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 the preferred embodiment of the present invention, two communication optical fibers are inserted 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.

The utility model discloses a further embodiment, shielding structure's cross sectional area is the product of the cross-section of wire shielding layer and strap shielding layer on the same cross-section, this cross-section perpendicular to cable axis. And accurately controlling the resistance value of the shielding layer.

The utility model discloses a preferred embodiment, the weight of heat conduction filling paste is to the weight percentage component: 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.

The utility model discloses a further embodiment, corrugated metal pipe is corrugated stainless steel pipe, and the armor steel wire is arranged in corrugated metal pipe's outer peripheral face with spacing each other, and this armor steel wire is the low carbon steel wire. 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.

The utility model discloses a further embodiment, conductor shielding layer and insulation shielding layer are formed by the crowded package of peroxide crosslinked type semiconductive shield material, the insulating layer is formed by the crowded package of peroxide crosslinked polyethylene insulating material.

Drawings

The intelligent sensing photoelectric 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 structure diagram of an embodiment of the intelligent sensing photoelectric composite cable of the present invention;

FIG. 2 is a schematic cross-sectional view of the optical communication fiber of the structure of FIG. 1;

FIG. 3 is a schematic cross-sectional view of the temperature measuring fiber in the structure of FIG. 1.

In the figure, 1-conductor cable core, 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-heat insulation layer, 69-outer sleeve, 7-isolation sleeve, 8-steel wire armor layer, 9-temperature measurement optical fiber, 91-temperature measurement fiber core, 92-temperature measurement cladding, 93-heat conduction layer, 94-heat conduction filling ointment, 95-metal outer pipe, 10-wrapping tape layer, 11-inner sheath, 12-outer sheath.

Detailed Description

As shown in fig. 1, a conductor cable core 1 of the intelligent sensing photoelectric composite cable is formed by twisting a plurality of pure copper metal conductor monofilaments, for example, the conductor cable core 1 is formed by twisting 14, 19 or 60 copper monofilaments, the diameter of each monofilament conductor is 2.6mm or 2.93mm, the copper monofilaments are twisted in multiple layers, and the twisting direction and the pitch-diameter ratio of the adjacent two layers of monofilament conductors are different. The conductor cable comprises a conductor cable core 1, and is characterized in that 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 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.

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. 2, 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. 3, 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.

The foregoing has outlined some of the preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and many modifications and variations may be made without departing from the basic principles of the 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. All such modifications and variations are intended to be included herein within the scope of this disclosure.

Claims (8)

1. The utility model provides an intelligence perception photoelectricity composite cable, includes conductor cable core (1), and this conductor cable core (1) is formed by a plurality of metallic conductor monofilament transposition, has set gradually conductor shielding layer (2), insulating layer (3) and insulation shielding layer (4), its characterized in that outside conductor cable core (1): 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), heat insulation coatings (68) are arranged outside the inner sleeves (67), and outer sleeves (69) are sleeved on the heat insulation coatings (68); the temperature measurement optical fiber (9) comprises a temperature measurement fiber core (91) and a temperature measurement cladding (92) coated outside the temperature measurement fiber core (91), the temperature measurement cladding (92) is coated with a heat conduction layer (93), a metal outer pipe (95) is sleeved on the periphery of the heat conduction layer (93) at intervals, and heat conduction filling paste (94) is filled between the heat conduction layer (93) and the metal outer pipe (95); 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 intelligent sensing photoelectric 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 between a plurality of steel wires forming the steel wire armor layer (8).

3. The intelligent sensing photoelectric 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.

4. The intelligent sensing photoelectric 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 gaps.

5. The intelligent sensing photoelectric composite cable of claim 1, wherein: the cross-sectional area of the shielding structure (5) is the product 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.

6. The intelligent sensing photoelectric 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.

7. The intelligent sensing photoelectric composite cable of claim 1 or 6, 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.

8. The intelligent sensing photoelectric composite cable of claim 1, wherein: the conductor shielding layer (2) and the insulation shielding layer (4) are formed by extruding peroxide cross-linked semi-conductive shielding materials, and the insulation layer (3) is formed by extruding peroxide cross-linked polyethylene insulation materials.

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