Intelligent cable based on dynamic monitoring information feedback and preparation method thereof

Abstract

The invention relates to the technical field of intelligent cables, and discloses an intelligent cable based on dynamic monitoring information feedback and a preparation method thereof.The intelligent cable comprises an insulating wire core, a corrugated aluminum sleeve and an anti-abrasion layer which are coaxial are arranged on the circumferential side of the insulating wire core, a containing area is formed in the insulating wire core, and a temperature measuring optical fiber is arranged in the containing area; the temperature measuring optical fiber coats the outer side of the separated conductor structure; the insulated wire core comprises a separated conductor structure, the separated conductor structure is composed of a straight cable core and a plurality of cable strands uniformly wound outside the cable core, and the plurality of cable strands are wound on the cable core in a spiral track; according to the invention, the arrangement position of the temperature measuring optical fiber is optimized, and the temperature measuring optical fiber is arranged in the fan-shaped accommodating area which is far away from the corrugated aluminum sleeve and is formed between the spiral cable strands, so that the tensile and compressive stress borne by the temperature measuring optical fiber is minimum when the cable is bent, and the temperature measuring optical fiber can be effectively prevented from being directly attached to the wave trough of the inner side of the aluminum sleeve to be damaged due to pressure.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of intelligent cables, more particularly, it relates to an intelligent cable based on dynamic monitoring information feedback and a preparation method thereof. BACKGROUND

[0002] 220kV cross-linked polyethylene (XLPE) insulation corrugated aluminum jacket power cable is currently widely used in high-voltage power tunnel cable, cross-sea or long-distance power transmission line wind power, rail transit and other key power supply system fields, by combining power cable with optical fiber sensing technology to form intelligent cable, the intelligent cable uses optical fiber as sensing medium, through measuring the change of optical signal, the environment parameters around the cable can be detected, distributed optical fiber sensing technology can provide continuous monitoring data along the entire cable length, which is particularly useful for long-distance power transmission cable, and can provide protection for the safe and stable operation of the power grid; The temperature measurement sensing optical fiber arranged in the axial direction in the 220kV cross-linked polyethylene (XLPE) insulation corrugated aluminum jacket power cable will bring mechanical risk to the temperature measurement optical fiber due to the structural characteristics of the corrugated aluminum jacket, especially when the cable is bent, the risk of the temperature measurement optical fiber being squeezed, excessively bent or even broken is greatly increased, the reason is that the corrugated aluminum jacket is made by forming corrugations (extruding annular or spiral grooves) after longitudinal wrapping of the aluminum strip, when bending, the inside is compressed and the outside is stretched, local deformation occurs between the valleys and peaks, and the temperature measurement optical fiber is usually arranged on the inside surface of the aluminum jacket (close to the insulation shielding layer) or between the aluminum jacket and the outer sheath, when the cable is bent, the valleys of the corrugated aluminum jacket are compressed, the space becomes smaller, and the temperature measurement optical fiber in the inside or gap is squeezed, and the temperature measurement optical fiber itself is highly brittle and extremely sensitive to lateral squeezing, micro-bending and twisting. SUMMARY

[0003] The present application provides an intelligent cable based on dynamic monitoring information feedback and a preparation method thereof, which solves the technical problem that the temperature measurement optical fiber in the intelligent power cable containing a corrugated aluminum jacket is easily squeezed when the cable is bent, and the optical fiber is damaged, affecting the cable monitoring information feedback.

[0004] The present application provides an intelligent cable based on dynamic monitoring information feedback, which comprises an insulation core, a coaxial corrugated aluminum jacket and an anti-abrasion layer are arranged on the circumferential side of the insulation core, a containing area is formed in the insulation core, a temperature measurement optical fiber is arranged in the containing area, and the temperature measurement optical fiber is covered on the outside of a separated conductor structure. The insulation core comprises a separated conductor structure, which is composed of a straight cable core and a plurality of cable strands uniformly wound outside the cable core, and the plurality of cable strands are arranged on the cable core in a spiral track.

[0005] In a preferred embodiment, the temperature measuring fiber extends along the axial direction of the insulated core in a spiral trajectory, the center line of the spiral trajectory of the temperature measuring fiber is coaxial with the axis of the insulated core, and the spiral trajectory of the temperature measuring fiber is consistent with the spiral trajectory of the cable strand. The cross section of the cable strand is fan-shaped, gaps are formed between adjacent cable strands, the gaps form an accommodation area, the temperature measuring fiber is located in the accommodation area and separates the cable strands, and a filler strip is arranged in each gap.

[0006] In a preferred embodiment, the insulated core further comprises a conductor shielding layer one, a VCV main insulation layer and an insulation shielding layer one, and the conductor shielding layer one, the VCV main insulation layer and the insulation shielding layer one are sequentially arranged on the circumferential side of the separated conductor structure from inside to outside.

[0007] In a preferred embodiment, a plurality of insulated cores are provided, and the plurality of insulated cores are symmetrically arranged at the center of the intelligent cable. A plurality of gaps in the shape of a fan are formed between the insulated core and the plastic reinforced protective layer, the gaps form an accommodation area, the accommodation area is filled with a filler strip, the filler strip is provided with a placement hole, the temperature measuring fiber is placed in the placement hole, and a gap is left between the outer wall of the temperature measuring fiber and the inner wall of the placement hole. The axis of the placement hole is arranged in parallel with the axis of the separated conductor structure, and the temperature measuring fiber is arranged in parallel with the separated conductor structure.

[0008] In a preferred embodiment, the circumferential side of the insulated core is sleeved with a plastic reinforced protective layer, the circumferential side of the plastic reinforced protective layer is sequentially provided with a cable bundling belt, a conductor shielding layer two and an insulation shielding layer two from inside to outside, and a corrugated aluminum sleeve and an anti-abrasion layer are sequentially arranged on the circumferential side of the insulation shielding layer two. After the aluminum strip is welded and sealed by argon arc welding double welding gun welding process, the flat aluminum sleeve is rolled into a corrugated structure by a rolling machine, and the anti-abrasion layer forms a sealing sleeve structure by extrusion coating process outside the corrugated aluminum sleeve.

[0009] In a preferred embodiment, the filler strip is composed of one or more of a polyester tape, a sponge layer and a thermoplastic elastomer protective layer.

[0010] A preparation method of an intelligent cable based on dynamic monitoring information feedback, comprising the following steps: Step one, a copper rod is drawn into a single wire of a desired diameter by a wire drawing machine, and a plurality of single wires are twisted together in a spiral trajectory to form a separated conductor structure. A layer of semi-conductive nylon belt is wrapped around the formed separated conductor structure; Step two, the separated conductor structure wrapped with the semi-conductive nylon belt is passed through a VCV production line, and three layers of materials are extruded simultaneously through a die head to sequentially form a conductor shielding layer one, a VCV main insulation layer and an insulation shielding layer one from inside to outside, thereby forming an insulated core. Step three, slowly cool the insulated wire core and wind it on the wire reel, then put the wrapped wire core into the constant temperature degassing chamber for a period of time; Step four, wrap the semi-conductive water-resistant hose outside the degassed insulated wire core; Step five, longitudinally wrap the aluminum tape on the insulated wire core wrapped with the semi-conductive water-resistant hose, weld and seal, then pass through the embossing machine to emboss the flat aluminum sleeve into a corrugated structure to form a corrugated aluminum sleeve; Step six, extrude a layer of polyethylene wear-resistant layer outside the corrugated aluminum sleeve.

[0011] In a preferred embodiment, in step four, a plastic reinforced protective layer is prepared on the insulated wire core through the VCV production line again, and is wrapped in the order of cable binding tape, conductor shielding layer two and insulation shielding layer two to form a cable core.

[0012] In a preferred embodiment, in step five, the aluminum tape is welded by using argon arc welding double welding gun welding process.

[0013] In a preferred embodiment, a fire-retardant layer is further arranged in the intelligent cable, which is a fireproof mud layer or a fire-retardant layer made of glass fiber tape, and is arranged outside the insulated wire core wrapped with the semi-conductive water-resistant hose.

[0014] The beneficial effects of the present application are: 1. The present application optimizes the arrangement position of the temperature measuring optical fiber, which is arranged in the fan-shaped accommodation area formed between the spiral strands and near the neutral layer of the whole cable, so that the tensile stress on the temperature measuring optical fiber is minimized when the cable is bent, and the temperature measuring optical fiber can be effectively prevented from being directly attached to the inner side of the aluminum sleeve and being damaged under pressure; 2. The present application winds the temperature measuring optical fiber in the fan-shaped accommodation area formed between the spiral strands in a small-pitch spiral manner, which prolongs the laying length of the temperature measuring optical fiber in the cable, disperses the bending stress of the temperature measuring optical fiber when the cable is bent, and increases the deformable allowance of the temperature measuring optical fiber, thereby avoiding axial tension or compression, better adapting to the expansion and bending deformation of the cable, in addition, the accommodation area formed by the spiral tracks between the spiral strands can exactly meet the accommodation requirements of the temperature measuring optical fiber, and the spiral arranged temperature measuring optical fiber can also increase its contact area with the cable without changing the original external structure of the cable, so that the monitoring result is more accurate, and the risk performance of the temperature measuring optical fiber against cable expansion and bending is improved. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a three-dimensional schematic view of the cable structure of the single-strand cable core of the present application; Figure 2 is a cross-sectional schematic view of the cable structure of the single-strand cable core of the present application; Figure 3 is a schematic diagram of a separated conductor structure of the present invention; Figure 4 is a schematic diagram of forming an accommodation area on a separated conductor structure of the present invention; Figure 5 It is a schematic diagram of the placement of the separation conductor structure and the temperature measurement optical fiber of the present invention; Figure 6 It is a schematic diagram of the cable strand structure of the present invention; Figure 7 is a top view of the separated conductor structure of the present invention; Figure 8 It is a three-dimensional schematic diagram of the cable structure of the multi-strand cable core of the present invention; Figure 9 1 is a schematic cross-sectional view of a cable structure of a multi-strand cable core according to the present invention; Figure 10 Schematic diagram of the position of the separation conductor structure and the temperature measurement optical fiber of the present invention; Figure 11 It is a flow chart of the cable preparation method of the present invention.

[0016] In the figure: 1. Insulated core; 11. Separated conductor structure; 111. Cable core; 112. Cable strand; 12. Conductor shield layer 1; 13. VCV main insulation layer; 14. Insulation shield layer 1; 2. Plastic reinforced protective layer; 3. Cable binding tape; 4. Conductor shield layer 2; 5. Insulation shield layer 2; 6. Corrugated aluminum sleeve; 7. Anti-wear layer; 8. Temperature measuring optical fiber; 9. Filling strip; 91. Placement hole; 100. Accommodation area. DETAILED DESCRIPTION

[0017] The subject matter described herein will now be discussed with reference to exemplary embodiments. It should be understood that these embodiments are discussed solely to enable those skilled in the art to better understand and implement the subject matter described herein, and that the functions and arrangements of the elements discussed may be varied without departing from the scope of this specification. Various examples may omit, substitute, or add various processes or components as needed. In addition, features described with respect to some examples may also be combined in other examples.

[0018] Example 1, as Figure 1 As shown, an intelligent cable based on dynamic monitoring information feedback includes an insulating core 1, a coaxial corrugated aluminum sleeve 6 and an anti-wear layer 7 are provided on the circumferential side of the insulating core 1, an accommodating area 100 is formed in the insulating core 1, and a temperature measuring optical fiber 8 (such as Figure 2 、 Figure 3 and Figure 4 As shown in the combined figure), the temperature measuring optical fiber 8 is coated on the outside of the separation conductor structure 11; The insulated wire core 1 comprises a separated conductor structure 11, which is composed of a flat cable core 111 and a plurality of cable strands 112 uniformly wound outside the cable core 111, and the cable strands 112 are arranged on the cable core 111 in a spiral track; The flat cable core 111 is located at the center of the separated conductor structure 11, which is composed of a plurality of single wire cores, and the cable strands 112 are spirally wound to form a plurality of wire cores, and the cable strands 112 are distributed on the circumferential side of the cable core 111 in a circular manner, forming the separated conductor structure 11, and reducing the skin effect.

[0019] It should be noted that the temperature measuring optical fiber 8 is laid along the whole length of the intelligent cable, which can realize continuous temperature monitoring from the starting point to the ending point of the intelligent cable, and the precision can reach per meter or even smaller interval, which avoids the blind area of the traditional point sensor, and the system can set the sampling frequency, for example, collecting once per second or per minute, and real-time acquisition of the temperature data of each section of the cable, and the data is transmitted to the monitoring center through the communication network (such as Ethernet, 4G / 5G), which realizes real-time early warning, when the ambient temperature of the cable increases (such as high temperature in summer, poor ventilation of the tunnel, adjacent heat source), the temperature measuring optical fiber can perceive the temperature change in the first time, when the local overheating caused by cable overload or local poor contact occurs, it will also be shown as a "hot spot" in the temperature measuring graph of the temperature measuring optical fiber, which is convenient for quickly positioning the fault point of the cable; The temperature measuring optical fiber of the present application represents the optical fiber temperature measuring unit, which not only specifically refers to the temperature measuring optical fiber, but also should be considered to include a series of components for realizing the temperature measurement of the cable, such as multimode optical fiber or grating optical fiber, in the present application, only the temperature measuring optical fiber arranged in the cable is taken as an example to represent the simple description of the cable sensing technology; The present application can realize real-time, continuous and accurate acquisition of the temperature distribution of the whole cable by embedding the temperature measuring sensing optical fiber into the cable structure and combining with the DTS technology, so as to effectively monitor the influence of the environment and the running state on the cable, and realize early fault warning and intelligent operation and maintenance.

[0020] As shown in Figure 10 The temperature measuring optical fiber 8 extends along the axial direction of the insulated wire core 1 in a spiral track, the center line of the spiral track of the temperature measuring optical fiber 8 is coaxial with the axis of the insulated wire core 1, and the spiral track of the temperature measuring optical fiber 8 is consistent with the spiral track of the cable strand 112, and the cross section of the cable strand 112 is approximately fan-shaped (as shown in Figure 2 The cross section of the cable strand 112 can also be approximately circular (as shown in Figure 6 and Figure 7 The adjacent two of the plurality of cable strands 112 form a gap, and the plurality of gaps form an accommodation area 100, the temperature measuring optical fiber 8 is located in the accommodation area 100 and separates the plurality of cable strands 112, and the filling strips 9 are arranged in the plurality of gaps, the filling strips 9 wrap the temperature measuring optical fiber 8 and isolate the temperature measuring optical fiber 8 from the separated conductor structure 11.

[0021] As Figure 5 shown, the insulated core 1 further comprises a conductor shielding layer 12, a VCV main insulation layer 13 and an insulation shielding layer 14, and the conductor shielding layer 12, the VCV main insulation layer 13 and the insulation shielding layer 14 are sequentially arranged from inside to outside on the circumferential side of the separated conductor structure 11.

[0022] In the present application, by optimizing the arrangement position of the temperature measuring optical fiber 8, the temperature measuring optical fiber 8 is placed away from the corrugated aluminum sleeve 6 and in the fan-shaped accommodation area 100 formed between the spiral cable strands 112 and near the neutral layer of the entire cable, so that the tensile stress on the temperature measuring optical fiber 8 is minimized when the cable is bent, and the temperature measuring optical fiber 8 can be effectively prevented from being directly attached to the inside valley of the aluminum sleeve and being damaged under pressure; In the present application, by arranging the soft and elastic filling strip 9 in the accommodation area 100, the filling strip 9 wraps the temperature measuring optical fiber 8 and absorbs the local pressure when the cable is bent, preventing the aluminum sleeve corrugation from directly pressing the optical fiber; In the present application, by winding the temperature measuring optical fiber 8 in a small pitch spiral manner in the fan-shaped accommodation area 100 formed between the spiral cable strands 112, the laying length of the temperature measuring optical fiber 8 in the cable is prolonged, the bending stress of the temperature measuring optical fiber 8 is dispersed when the cable is bent, and the deformability of the temperature measuring optical fiber 8 is increased, thereby avoiding axial tension or compression, and better adapting to the expansion and bending deformation of the cable. In addition, the spiral track accommodation area 100 formed between the spiral cable strands 112 can exactly meet the accommodation requirements of the temperature measuring optical fiber 8, without changing the original external structure of the cable (for example, the appearance of the cable is still round, and the increase of the temperature measuring optical fiber 8 will not cause some protrusions on the surface of the cable), and at the same time, the spiral arrangement of the temperature measuring optical fiber not only increases its contact area with the cable, making the monitoring result more accurate, but also increases the risk performance of the temperature measuring optical fiber 8 against cable expansion and bending.

[0023] In embodiment 2, an intelligent cable based on dynamic monitoring information feedback is provided, which comprises an insulated core 1, wherein a plurality of insulated cores 1 are arranged in a symmetrical manner at the center of the intelligent cable, a plurality of gaps in the shape of a fan are formed between the insulated core 1 and the plastic reinforced protective layer 2, the gaps form an accommodation area 100, the accommodation area 100 is filled with a filling strip 9, the filling strip 9 is provided with a placement hole 91, a temperature measuring optical fiber 8 is placed in the placement hole 91, and a gap is left between the outer wall of the temperature measuring optical fiber 8 and the inner wall of the placement hole 91, the axis of the placement hole 91 is arranged in parallel with the axis of the separated conductor structure 11, the circumferential side of the insulated core 1 is provided with a coaxial corrugated aluminum sleeve 6 and an anti-abrasion layer 7, the insulated core 1 forms an accommodation area 100, and the temperature measuring optical fiber 8 is arranged in the accommodation area 100. Figure 8 and Figure 9As shown in FIG. 1, the temperature measuring fiber 8 is wrapped outside the separated conductor structure 11; In embodiment 2, the insulated core 1 comprises the separated conductor structure 11, which can be composed of a flat cable core 111 and a plurality of cable strands 112 uniformly wound outside the cable core 111, and the plurality of cable strands 112 are arranged on the cable core 111 in a spiral track (the core can have the same structure as that in embodiment 1, or can be formed by only a single cable strand or without winding); As shown in FIG. 1, the temperature measuring fiber 8 is wrapped outside the separated conductor structure 11; Figure 8 As shown in FIG. 1, the temperature measuring fiber 8 is wrapped outside the separated conductor structure 11; Figure 9 As shown in FIG. 1, the temperature measuring fiber 8 is wrapped outside the separated conductor structure 11;

[0024] In an embodiment of the present application, the filling strip 9 is composed of one or more of a polyester tape, a sponge layer, and a thermoplastic elastomer protective layer.

[0025] In the present application, by arranging the placement hole 91 with a larger diameter than the temperature measuring fiber 8 in the filling strip 9, the temperature measuring fiber 8 has a deformable margin when the cable is bent, thereby improving the anti-deformation ability of the temperature measuring fiber 8.

[0026] As shown in FIG. 1, the temperature measuring fiber 8 is wrapped outside the separated conductor structure 11; Figure 11 As shown in FIG. 1, the temperature measuring fiber 8 is wrapped outside the separated conductor structure 11; Step one, a copper rod is drawn into a single wire with a desired diameter by a wire drawing machine, and a plurality of single wires are twisted together in a spiral track to form the separated conductor structure 11, and a layer of semi-conductive nylon belt is wrapped around the formed separated conductor structure 11; It should be noted that the separated conductor structure 11 can effectively increase the conductor surface area, reduce the skin effect, reduce the alternating current resistance, and improve the transmission efficiency; Step two, the separated conductor structure 11 wrapped with the semi-conductive nylon belt is passed through a VCV production line, and three layers of materials are extruded through one head at the same time to form, from the inside to the outside, the conductor shielding layer one 12 (semi-conductive XLPE), the VCV main insulation layer 13 (ultra-pure cross-linked polyethylene XLPE), and the insulation shielding layer one 14 (semi-conductive XLPE), thereby forming the insulated core 1; It should be noted that the role of this step is to smooth the conductor surface electric field, prevent partial discharge, and prepare for the subsequent extrusion process; Three-layer co-extrusion technology ensures that there is no gap and no interface defect between the layers, forming a perfect whole. The extruded core enters the VCV tower, where it completes the cross-linking (vulcanization) reaction in a high-temperature and high-pressure nitrogen environment, turning the thermoplastic polyethylene into a thermosetting cross-linked polyethylene, greatly improving its heat resistance and mechanical properties. During or after the cross-linking process, an online eccentricity measuring instrument is used to monitor and adjust the concentricity of the insulation layer in real time, ensuring uniform insulation thickness and optimal core quality, and preventing uneven electric field distribution caused by eccentricity. Step three, slowly cool the insulated core 1 and wind it on the reel, then put the wrapped core into a constant-temperature degassing chamber for a period of time. It should be noted that the purpose of degassing treatment is to remove by-products (such as methane and peroxide decomposition gas) generated during the cross-linking reaction to prevent these gases from causing excessive internal pressure or partial discharge in the cable during operation.

[0027] Step four, wrap the semi-conductive water-blocking tape outside the degassed insulated core 1, then pass it through the VCV production line to make the plastic reinforced protective layer 2 outside the degassed insulated core 1, and then wrap the cable tie, conductor shielding layer two and insulation shielding layer two 5 in sequence to form the cable core. It should be noted that wrapping the semi-conductive water-blocking tape, cable tie, conductor shielding layer two, insulation shielding layer two, and extruding the protective layer through the VCV process are all to protect the insulated core from damage by the metal sheath. Once the metal sheath is damaged, the water-blocking tape will swell when it comes into contact with water, preventing water from spreading longitudinally along the cable.

[0028] Step five, longitudinally wrap the aluminum tape outside the cable core, use argon arc welding double welding gun welding process to weld the aluminum tape seam, and then use the texturing machine to roll the flat aluminum sleeve into a corrugated structure to form the corrugated aluminum sleeve 6. It should be noted that the corrugated structure increases the flexibility and bendability of the cable.

[0029] Step six, extrude a layer of polyethylene wear-resistant layer 7 outside the corrugated aluminum sleeve 6.

[0030] It should be noted that the wear-resistant layer mainly plays the role of corrosion protection, mechanical damage prevention, and chemical corrosion prevention; according to environmental needs, different formulations of corrosion-resistant coatings may be selected.

[0031] The intelligent cable also has a fire-retardant layer, which is a fire-retardant layer made of fire-retardant mud or glass fiber tape, wrapped outside the insulated core 1 wrapped with semi-conductive water-blocking tape.

[0032] The above describes the embodiments of the present embodiment, but the present embodiment is not limited to the above-described specific embodiments, and the above-described specific embodiments are only illustrative but not restrictive, and those skilled in the art can make many forms under the inspiration of the present embodiment, which all belong to the protection of the present embodiment.

Claims

1. An intelligent cable based on dynamic monitoring information feedback, characterized in that: The invention comprises an insulating core (1), wherein a coaxial corrugated aluminum sleeve (6) and an anti-wear layer (7) are provided on the circumferential side of the insulating core (1), an accommodating area (100) is formed in the insulating core (1), a temperature measuring optical fiber (8) is arranged in the accommodating area (100), the temperature measuring optical fiber (8) is coated on the outside of the separation conductor structure (11), and the temperature measuring optical fiber (8) is combined with the DTS technology to form a distributed optical fiber sensing system, and the distributed optical fiber sensing system is used to monitor the ambient temperature of the cable in real time; The insulated wire core (1) comprises a separated conductor structure (11), the separated conductor structure (11) consisting of a straight cable core (111) and a plurality of cable strands (112) uniformly wound around the cable core (111), the plurality of cable strands (112) being wound around the cable core (111) in a spiral trajectory.

2. The intelligent cable based on dynamic monitoring information feedback according to claim 1, characterized in that: The temperature measuring optical fiber (8) is in a spiral trajectory and extends along the axial direction of the insulating core (1). The center line of the spiral trajectory of the temperature measuring optical fiber (8) is coaxial with the axis of the insulating core (1), and the spiral trajectory of the temperature measuring optical fiber (8) is consistent with the spiral trajectory of the cable strand (112). The cross-section of the cable strand (112) is fan-shaped. A gap is formed between two adjacent strands of the plurality of cable strands (112). The plurality of gaps form a receiving area (100). The temperature measuring optical fiber (8) is located in the receiving area (100) and separates the plurality of cable strands (112). Filling strips (9) are arranged in the plurality of gaps. The filling strips (9) wrap the temperature measuring optical fiber (8) to isolate the temperature measuring optical fiber (8) from the separation conductor structure (11).

3. The intelligent cable based on dynamic monitoring information feedback according to claim 2, characterized in that: The insulated wire core (1) further comprises a conductor shielding layer (12), a VCV main insulation layer (13) and an insulation shielding layer (14), and the conductor shielding layer (12), the VCV main insulation layer (13) and the insulation shielding layer (14) are all arranged in sequence from the inside to the outside on the circumferential side of the separation conductor structure (11).

4. The intelligent cable based on dynamic monitoring information feedback according to claim 1, characterized in that: There are a plurality of insulating cores (1), and the plurality of insulating cores (1) are symmetrically arranged and placed at the center of the intelligent cable. A plurality of fan-shaped gaps are formed between the insulating cores (1) and the plastic reinforced protective layer (2), and the gaps form a receiving area (100). The receiving area (100) is filled with a filling strip (9), and a placement hole (91) is opened on the filling strip (9). The temperature measuring optical fiber (8) is placed in the placement hole (91), and a gap is left between the outer wall of the temperature measuring optical fiber (8) and the inner wall of the placement hole (91). The axis of the placement hole (91) is arranged parallel to the axis of the separation conductor structure (11), and the temperature measuring optical fiber (8) is arranged parallel to the separation conductor structure (11).

5. The intelligent cable based on dynamic monitoring information feedback according to claim 3 or 4, characterized in that: The circumferential side of the insulating core (1) is sheathed with a plastic reinforced protective layer (2), and the circumferential side of the plastic reinforced protective layer (2) is sequentially provided with a cable binding belt (3), a conductor shielding layer 2 (4) and an insulating shielding layer 2 (5) from the inside to the outside. The corrugated aluminum sheath (6) and the anti-wear layer (7) are sequentially arranged outside the circumferential side of the insulating shielding layer 2 (5). The corrugated aluminum sheath (6) is welded and sealed with an aluminum strip weld seam by a double-torch argon arc welding process, and then the flat aluminum sheath is rolled into a corrugated structure by a corrugating machine. The anti-wear layer (7) is formed on the outside of the corrugated aluminum sheath (6) by an extrusion coating process to form a sealing sheath structure.

6. The intelligent cable based on dynamic monitoring information feedback according to claim 5, characterized in that: The filling strip (9) is composed of one or more of a polyester tape, a sponge layer and a thermoplastic elastomer sheath.

7. The method for preparing a smart cable based on dynamic monitoring information feedback according to claim 3, characterized in that: The following steps are involved: Step 1: Drawing a copper rod into a single wire of a desired diameter through a wire drawing machine, twisting a plurality of single wires together in a spiral direction to form a separation conductor structure (11), and wrapping a layer of semi-conductive nylon tape around the formed separation conductor structure (11); Step 2: Passing the separated conductor structure (11) wrapped with the semi-conductive nylon tape through a VCV production line, extruding three layers of material simultaneously through a die head, and sequentially preparing a conductor shielding layer (12), a VCV main insulation layer (13) and an insulation shielding layer (14) from the inside to the outside, thereby forming an insulated wire core (1); Step 3: slowly cool the insulated wire core (1) and wind it onto a wire drum, then place the wound wire core into a constant temperature degassing chamber and let it stand for a period of time; Step 4: Wrap the degassed insulated wire core (1) with a semi-conductive water tape; Step 5: longitudinally wrap the aluminum tape around the insulated wire core (1) wrapped with the semi-conductive water-resistant tape, weld and seal it, and then use a corrugating machine to roll the flat aluminum sleeve into a corrugated structure to form a corrugated aluminum sleeve (6); Step 6: Extrusion-coat a polyethylene anti-wear layer (7) on the outside of the corrugated aluminum sleeve (6).

8. The method for preparing a smart cable based on dynamic monitoring information feedback according to claim 7, characterized in that: In step 4, a plastic reinforced protective layer (2) is produced on the insulated core (1) through the VCV production line again, and is then wrapped in sequence to form a cable binding tape, a second conductor shielding layer, and a second insulating shielding layer (5) to form a cable core.

9. The method for preparing a smart cable based on dynamic monitoring information feedback according to claim 8, characterized in that: In step five, the aluminum strip weld is welded together using a TIG twin-torch welding process.

10. The method for preparing a smart cable based on dynamic monitoring information feedback according to claim 9, characterized in that: The intelligent cable is further provided with a flame retardant layer, which is a flame retardant layer made of a fireproof mud layer or a glass fiber tape and is sleeved on the outside of the insulating core (1) wrapped with a semi-conductive water-resistant tape.

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