Medium-Voltage Intelligent Cable

Abstract

20 25 28 35 87 19 D ec 2 02 5 A B S T R A C T 2 0 2 5 2 8 3 5 8 7 1 9 D e c 2 0 2 5 1 / 2 FIG. 1 FIG. 2 11 122 1 12 1211 1213 121 1212 2 3 5 4 FIG. 1 122 1221 121 FIG. 2 20 25 28 35 87 19 D ec 2 02 5 D e c 2 0 2 5 2 0 2 5 2 8 3 5 8 7 1 9 1 2 2 1 2 1 3 1 2 1 1 2 1 2 2 3 5 4 F I G . 1 1 2 2 1 2 2 1

Description

TECHNICAL FIELD

[0001] The present application relates to the field of cable manufacturing technology, particularly a medium-voltage intelligent cable. BACKGROUND

[0002] With the advancement of urban development, power distribution networks in urban areas have become increasingly complex. Failure of one or more medium-voltage intelligent cables used for power supply may affect the power supply of an entire region. In the related art, an optical fiber is embedded in a cable core of a medium-voltage intelligent cable, and the temperature of the cable core is monitored in real time based on the temperature sensing characteristics of the optical fiber, to determine the operating state of the medium-voltage intelligent cable in real time. According to a planned laying route, the medium-voltage intelligent cable is required to be spliced to achieve long-distance power transmission. However, in an existing medium-voltage intelligent cable with an embedded optical fiber, the optical fiber has a length consistent with that of the cable core and is prone to breakage under excessive tensile force. As a result, during optical fiber splicing, careful control of the tensile force applied to the optical fiber is required, which increases splicing difficulty and reduces splicing efficiency.

[0003] Therefore, it is urgent to provide a medium-voltage intelligent cable to solve this problem. SUMMARY

[0004] The present application provides a medium-voltage intelligent cable to solve the problem that during optical fiber splicing, careful control of the tensile force applied to the optical fiber is required, which increases splicing difficulty and reduces splicing efficiency.

[0005] The present application uses the following technical solutions: 2025283587   19 Dec 2025

[0006] A medium-voltage intelligent cable includes a central member and an outer sheath sleeved on the periphery of the central member. The central member includes at least two cable cores and a temperature monitoring member. The temperature monitoring member is disposed in a gap between the at least two cable cores, has a length consistent with a length of each cable core, and is stranded with the at least two cable cores. The temperature monitoring member includes a sensing optical fiber and two fiber storage members. The sensing optical fiber is configured to monitor a temperature of the at least two cable cores and includes a first region, a second region, and a third region along the length direction of the sensing optical fiber. The first region and the third region are wound in one-to-one correspondence around peripheries of the two fiber storage members.

[0007] In an embodiment of the present application, the fiber storage member has a tapered structure.

[0008] In an embodiment of the present application, the fiber storage member is made of foamed polyethylene.

[0009] In an embodiment of the present application, a groove is circumferentially formed on the periphery of the fiber storage member, and the sensing optical fiber is disposed in the groove.

[0010] In an embodiment of the present application, the sensing optical fiber includes a fiber core and a flexible sheath sleeved on the periphery of the fiber core.

[0011] In an embodiment of the present application, the sensing optical fiber also includes a tensile layer located between the fiber core and the flexible sheath and woven from a Kevlar material.

[0012] In an embodiment of the present application, the medium-voltage intelligent cable also includes an inner sheath extruded to cover the periphery of the central member.

[0013] In an embodiment of the present application, the medium-voltage intelligent cable also includes a filler disposed between the inner sheath and the central member. 2025283587   19 Dec 2025

[0014] In an embodiment of the present application, the medium-voltage intelligent cable also includes an armor layer disposed between the inner sheath and the outer sheath.

[0015] In an embodiment of the present application, the medium-voltage intelligent cable also includes two heat shrink protective tubes sleeved in one-to-one correspondence on two ends of the central member.

[0016] By providing the fiber storage member for accommodating the sensing optical fiber, the length of the temperature monitoring member is consistent with the length of each cable core, thereby ensuring the appearance quality of the medium-voltage intelligent cable. When splicing of the medium-voltage intelligent cable is required, since the first region and the third region of the sensing optical fiber are wound in one-to-one correspondence around the two fiber storage members, the worker can pull outward the sensing optical fiber wound around the fiber storage member and then splice the sensing optical fibers and the cable cores of different medium-voltage intelligent cables. Since the sensing optical fiber is no longer limited by length, excessive tensile force applied to the sensing optical fiber during splicing of the sensing optical fiber can be avoided so that splicing of the sensing optical fiber becomes easier, thereby effectively improving the splicing efficiency of the medium-voltage intelligent cable. BRIEF DESCRIPTION OF DRAWINGS

[0017] FIG. 1 is a section view of a medium-voltage intelligent cable according to the present application.

[0018] FIG. 2 is an assembly diagram of a sensing optical fiber and a fiber storage member of a medium-voltage intelligent cable according to the present application.

[0019] FIG. 3 is a flowchart of a manufacturing method of a medium-voltage intelligent cable according to the present application.

[0020] Reference list

[0021] 1. central member; 11. cable core; 12. temperature monitoring member; 121. sensing 2025283587   19 Dec 2025 optical fiber; 1211. cable core; 1212. flexible sheath; 1213. tensile layer; 122. fiber storage member; 1221. groove; 2. inner sheath; 3. armor layer; 4. filler; 5. outer sheath DETAILED DESCRIPTION

[0022] The present application is further described below in detail in conjunction with the drawings and embodiments. It is to be understood that the embodiments described herein are intended to illustrate and not to limit the present application. Additionally, it is to be noted that for ease of description, only part, not all, of structures related to the present application are illustrated in the drawings.

[0023] In the description of the present application, terms "joined", "connected", and "fixed" are to be understood in a broad sense unless otherwise expressly specified and limited. For example, the term "connected" may refer to "fixedly connected", "detachably connected", or "integrated", may refer to "mechanically connected" or "electrically connected", or may refer to "connected directly", "connected indirectly through an intermediary", "connected inside two components", or an interaction relation between two components. For those of ordinary skill in the art, specific meanings of the preceding terms in the present application may be understood based on specific situations.

[0024] In the present application, unless otherwise expressly specified and limited, when a first feature is described as "on" or "below" a second feature, the first feature may be in direct contact with the second feature, or the first feature may be in contact with the second feature via another feature between the two features instead of being in direct contact. Moreover, when the first feature is described as "on", "above", or "over" the second feature, the first feature is right on, above, or over the second feature, the first feature is obliquely on, above, or over the second feature, or the first feature is simply at a higher level than the second feature. When the first feature is described as "under", "below", or "underneath" the second feature, the first feature is right under, below, or underneath the second feature, the first feature is obliquely under, below, or underneath the second feature, or the first feature is simply at a lower level than the second feature. 2025283587   19 Dec 2025

[0025] In the description of the embodiments, orientations or position relations indicated by terms such as "upper", "lower", and "right" are based on the drawings. These orientations or position relations are intended only to facilitate description and simplify operations and not to indicate or imply that a device or element referred to must have such particular orientations or must be configured or operated in such particular orientations. Thus, these orientations or position relations are not to be construed as limiting the present application. Additionally, terms "first" and "second" are used for distinguishing between descriptions and have no special meanings.

[0026] Embodiment one

[0027] As shown in FIG. 1 and FIG. 2, this embodiment provides a medium-voltage intelligent cable. The medium-voltage intelligent cable includes a central member 1 and an outer sheath 5. The central member 1 includes at least two cable cores 11 and a temperature monitoring member 12 disposed in a gap between the at least two cable cores 11. The temperature monitoring member 12 includes a sensing optical fiber 121 and two fiber storage members 122. The sensing optical fiber 121 includes a first region, a second region, and a third region along the length direction of the sensing optical fiber 121. The first region and the third region are wound in one-to-one correspondence around peripheries of the two fiber storage members 122. The temperature monitoring member 12 has a length consistent with the length of each cable core 11 and is stranded with the at least two cable cores 11. The sensing optical fiber 121 is configured to monitor the temperature of the at least two cable cores 11. The outer sheath 5 is sleeved on the periphery of the central member 1. The outer sheath 5 is configured to protect the central member 1 so that the extrusion resistance and the friction resistance of the medium-voltage intelligent cable are ensured.

[0028] When splicing of the medium-voltage intelligent cable of this embodiment is required, since the first region and the third region of the sensing optical fiber 121 are wound in one-to-one correspondence around the two fiber storage members 122, the sensing optical fiber 121 wound around the fiber storage member 122 can be pulled out and then spliced with the 2025283587   19 Dec 2025 sensing optical fibers 121 in different medium-voltage intelligent cables. Similarly, the cable core 11 in the medium-voltage intelligent cable can be also pulled out and then spliced with the cable cores 11 in different medium-voltage intelligent cables. Since the sensing optical fiber 121 is no longer limited by length, excessive tensile force applied to the sensing optical fiber 121 during splicing of the sensing optical fiber 121 can be avoided so that splicing of the sensing optical fiber 121 becomes easier, thereby effectively improving the splicing efficiency of the medium-voltage intelligent cable. In addition, the fiber storage member 122 for accommodating the sensing optical fiber 121 enables the length of the temperature monitoring member 12 to be consistent with the length of the cable core 11. Moreover, the sensing optical fiber 121 can be pulled out at any time when the medium-voltage intelligent cable is spliced, not only ensuring the appearance of the medium-voltage intelligent cable, but also making the splicing of the medium-voltage intelligent cable easier.

[0029] In this embodiment, the length of the first region and the length of the third region are both 700 mm, making it more convenient for the worker to splice the sensing optical fiber 121 inside the medium-voltage intelligent cable.

[0030] In this embodiment, the outer sheath 5 may be made of polyvinyl chloride or polyethylene. This is not limited herein.

[0031] In this embodiment, the fiber storage member 122 has a tapered structure so that it is more convenient for the sensing optical fiber 121 to be wound around the periphery of the fiber storage member 122, thereby reducing the assembly and production difficulty of the medium-voltage intelligent cable. Further, the fiber storage member 122 is made of foamed polyethylene. The foamed polyethylene features high elasticity, moisture resistance, shock resistance, high toughness, and high extrusion resistance so that when the fiber storage member 122 is placed in the gap between the cable cores 11, the outer diameter of the medium-voltage intelligent cable is not too large, that is, the medium-voltage intelligent cable is not too thick, and the appearance of the medium-voltage intelligent cable is further ensured. Further, a groove 1221 is circumferentially formed on the periphery of the fiber storage member 122, and the 2025283587   19 Dec 2025 sensing optical fiber 121 is disposed in the groove 1221. Specifically, the first region and the third region are wound in one-to-one correspondence around peripheries of the two fiber storage members 122. On the one hand, the groove 1221 can prevent the sensing optical fiber 121 from being excessively compressed, thereby further ensuring the use performance of the sensing optical fiber 121. On the other hand, the sensing optical fiber 121 can be clamped in the groove 1221 so as to be secured so that the sensing optical fiber 121 can be wound around the periphery of the fiber storage member 122 more stably.

[0032] For example, the sensing optical fiber 121 includes a fiber core 1211 and a flexible sheath 1212. The flexible sheath 1212 is sleeved on the periphery of the fiber core 1211 to protect the fiber core 1211. The flexible sheath 1212 may be made of polyimide. The polyimide not only has stable chemical properties, but also has good flexibility and high temperature resistance. The flexibility of the flexible sheath 1212 can reduce the risk of breakage of the fiber core 1211 inside the medium-voltage intelligent cable when the medium-voltage intelligent cable is bent. The high temperature resistance of the flexible sheath 1212 can prevent overheating of the cable core 11 from causing damage to the fiber core 1211, thereby stabilizing the transmission performance of the sensing optical fiber 121, enabling more stable monitoring of the temperature of the cable core 11, and ensuring the service life of the fiber core 1211. Of course, the flexible sheath 1212 may also be made of another material, such as polyethylene or polyvinyl chloride. This is not limited herein.

[0033] Optionally, the sensing optical fiber 121 also includes a tensile layer 1213 located between the fiber core 1211 and the flexible sheath 1212. The tensile layer 1213 can improve the tensile resistance of the sensing optical fiber 121, thereby reducing the risk of breakage of the sensing optical fiber 121 and thus further reducing the difficulty of splicing the medium-voltage intelligent cable when the worker splices the sensing optical fiber 121 of the medium-voltage intelligent cable. Optionally, the tensile layer 1213 is woven from a Kevlar material. As a type of aramid fiber material, the Kevlar material has the advantages of high strength, heat resistance, flame resistance, high toughness, and ease of processing, which ensure the performance of the tensile layer 1213. 2025283587   19 Dec 2025

[0034] In this embodiment, the medium-voltage intelligent cable also includes an inner sheath 2 extruded to cover the periphery of the central member 1. The inner sheath 2 can prevent the central member 1 from being loose, thereby ensuring the compactness of the medium-voltage intelligent cable. Further, the inner sheath 2 may be made of a cross-linked polyethylene material. Optionally, a filler 4 may be disposed in the gap between the central member 1 and the inner sheath 2 so that the medium-voltage intelligent cable has a more rounded overall shape. The filler 4 may be made of polyester tape, polypropylene tape, polyester fiber, or asbestos fiber. This is not limited herein.

[0035] In this embodiment, the medium-voltage intelligent cable also includes an armor layer 3 disposed between the inner sheath 2 and the outer sheath 5. The armor layer 3 can improve the mechanical strength of the medium-voltage intelligent cable to further ensure the tensile resistance and the extrusion resistance of the medium-voltage intelligent cable. The armor layer 3 can also protect the inner sheath 2 to further reduce the mechanical damage degree of the central member 1 inside the medium-voltage intelligent cable when the medium-voltage intelligent cable is subjected to compression. By way of example, a non-magnetic stainless steel tape may be wound around the periphery of the inner sheath 2 to form the armor layer 3 to avoid affecting the transmission stability of the sensing optical fiber 121.

[0036] Optionally, the medium-voltage intelligent cable also includes two heat shrink protective tubes sleeved in one-to-one correspondence on two ends of the central member 1. The heat shrink protective tubes can secure the two ends of the central member 1, reduce the risk of scattering of the cable core 11, the sensing optical fiber 121, and the fiber storage member 122, and further ensure the structural stability of the medium-voltage intelligent cable.

[0037] As shown in FIG. 3, this embodiment provides a manufacturing method of a medium-voltage intelligent cable. The manufacturing method is used for manufacturing the preceding medium-voltage intelligent cable. The manufacturing method of the medium-voltage intelligent cable includes the following:

[0038] Multiple copper wires are stranded with each other to form a conductor, and then an 2025283587   19 Dec 2025 insulating material is applied to cover the periphery of the conductor, so that the cable core 11 is formed. Specifically, the insulating material is cross-linked polyethylene.

[0039] The first region and the third region at two end portions of the sensing optical fiber 121 are wound in one-to-one correspondence around the two fiber storage members 122 to form the temperature monitoring member 12.

[0040] The temperature monitoring member 12 is disposed in the gap between the cable cores 11, and the temperature monitoring member 12 and the cable cores 11 are stranded with each other to form the central member 1.

[0041] A sheath material is applied to cover the periphery of the central member 1 to form the outer sheath 5. The particles of the sheath material are put into an extruder, hot-melted, and extruded, and then applied to cover the periphery of the central member 1.

[0042] Further, before the outer sheath 5 is manufactured, the manufacturing method also includes following:

[0043] The two heat shrink protective tubes are sleeved in one-to-one correspondence on two ends of the central member 1. The two heat shrink protective tubes are heat-shrunk by a heat gun to secure the two ends of the central member 1.

[0044] An inner sheath material is applied to cover the periphery of the central member 1 to form the inner sheath 2 to strengthen the protection of the central member 1. The inner sheath material may be made of cross-linked polyethylene.

[0045] A non-magnetic stainless steel tape is wound around the periphery of the inner sheath 2 to form the armor layer 3.

Claims

1. A medium-voltage intelligent cable, comprising:a central member (1), wherein the central member (1) comprises at least two cable cores (11) and a temperature monitoring member (12) disposed in a gap between the at least two cable cores (11), having a length consistent with a length of each cable core (11), and stranded with the at least two cable cores (11); the temperature monitoring member (12) comprises a sensing optical fiber (121) and two fiber storage members (122), the sensing optical fiber (121) is configured to monitor a temperature of the at least two cable cores (11) and comprises a first region, a second region, and a third region along a length direction of the sensing optical fiber (121), the first region and the third region are wound in one-to-one correspondence around peripheries of the two fiber storage members (122), the temperature monitoring member (12) has a length consistent with a length of each cable core (11) and is stranded with the at least two cable cores (11); andan outer sheath (5) sleeved on a periphery of the central member (1).

2. The medium-voltage intelligent cable of claim 1, wherein each fiber storage member of the two fiber storage members (122) has a tapered structure.

3. The medium-voltage intelligent cable of claim 2, wherein each fiber storage member (122) is made of foamed polyethylene.

4. The medium-voltage intelligent cable of claim 3, wherein a groove (1221) is circumferentially formed on a periphery of each fiber storage member (122), and the sensing optical fiber (121) is disposed in the groove (1221).

5. The medium-voltage intelligent cable of claim 1, wherein the sensing optical fiber (121) comprises a fiber core (1211) and a flexible sheath (1212) sleeved on a periphery of the fiber core (1211).

6. The medium-voltage intelligent cable of claim 5, wherein the sensing optical fiber (121) further comprises a tensile layer (1213) located between the fiber core (1211) and the flexible sheath (1212) and woven from a Kevlar material.2025283587   19 Dec 20257. The medium-voltage intelligent cable of claim 1, further comprising an inner sheath (2) extruded to cover a periphery of the central member (1).

8. The medium-voltage intelligent cable of claim 7, further comprising a filler (4) disposed between the inner sheath (2) and the central member (1).

9. The medium-voltage intelligent cable of claim 8, further comprising an armor layer (3) disposed between the inner sheath (2) and the outer sheath (5).

10. The medium-voltage intelligent cable of any one of claims 1 to 9, further comprising two heat shrink protective tubes sleeved in one-to-one correspondence on two ends of the central member (1).

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