Cable intermediate joint, cable intermediate joint temperature measurement system and connection method thereof

Abstract

The application discloses a cable intermediate joint, a cable intermediate joint temperature measuring system and a connecting method of the cable intermediate joint temperature measuring system, wherein the cable intermediate joint comprises a connecting pipe, an intermediate joint main body, a shielding net, a temperature measuring chip and a radio frequency signal transceiver device; the connecting pipe is used for connecting the wire core of two cables; the intermediate joint main body is sleeved outside the connecting pipe; the shielding net is sleeved outside the intermediate joint main body; the temperature measuring chip is embedded in the connecting pipe; the radio frequency signal transceiver device is arranged between the intermediate joint main body and the shielding net, and is used for receiving the data of the temperature measuring chip and transmitting the data to a background system. The application can realize more safe, effective and accurate measurement of the actual operation temperature of the wire core in the cable intermediate joint.

Description

Technical Field

[0001] This invention relates to the field of cable technology, and in particular to a cable joint, a cable joint temperature measurement system, and a connection method for the cable joint temperature measurement system. Background Technology

[0002] The weakest link in a cable system is the cable accessories. Monitoring the cable accessories system is essential for ensuring the normal operation of the cable system. Cable accessories are categorized into intermediate joints and terminations. The high-voltage end of a termination is typically exposed to air or high-pressure gas, making its parameters relatively easy to monitor. However, terminations exposed to air are significantly affected by environmental factors and cannot accurately reflect the cable's operating condition. Intermediate joints, on the other hand, operate in a sealed environment. Monitoring their condition provides a more accurate reflection of the cable's operating status. Typically, cable intermediate joints are fully sealed and shielded structures with limited internal space. For example, in a 10kV cable intermediate joint, conventional methods cannot be used to monitor the temperature at the internal core connection points.

[0003] Common methods for monitoring cable core temperature include fiber optic monitoring, chip monitoring, thermocouple monitoring, and self-powered sensor monitoring. Among these, thermocouple and fiber optic monitoring require wires to be led out from the high-voltage end inside the intermediate joint, which can easily create a discharge path from the high-voltage end to the low-voltage end of the intermediate joint, causing creepage and leading to intermediate joint accidents. Self-powered sensors use multi-layer coils to draw power, which are large in size and cannot be installed on small-section cables. Chip sensors transmit weak signals and cannot penetrate the shielding layer of the intermediate joint.

[0004] Since most cable joints are buried underground, moisture significantly affects the lifespan of electronic components. Currently, there is no safe and effective method to measure the temperature of the internal conductors in high-voltage cable joints.

[0005] The above content is only used to help understand the technical solution of the invention and does not represent an admission that the above content is prior art. Summary of the Invention

[0006] The main objective of this invention is to provide a cable intermediate joint designed to accurately measure the actual operating temperature of the cable intermediate joint.

[0007] To achieve the above objectives, the cable intermediate joint proposed in this invention includes a connecting pipe, an intermediate joint body, a shielding mesh, a temperature measuring chip, and a radio frequency signal transceiver device;

[0008] The connecting tube is used to connect the cores of the two cables;

[0009] The main body of the intermediate joint is sleeved around the outer periphery of the connecting pipe;

[0010] The shielding mesh is fitted around the outer perimeter of the intermediate joint body;

[0011] The temperature sensing chip is embedded in the connecting tube;

[0012] The radio frequency signal transceiver is located between the intermediate connector body and the shielding mesh. The radio frequency signal transceiver is used to receive data from the temperature measuring chip and transmit it to the background system.

[0013] In one embodiment, a groove is formed on the outer wall of the connecting tube, and the temperature measuring chip is embedded in the groove. The outer wall of the temperature measuring chip is flush with the outer wall of the connecting tube.

[0014] In one embodiment, the temperature sensing chip is arranged in the form of a sheet or a block.

[0015] In one embodiment, the radio frequency signal transceiver is positioned corresponding to the temperature measuring chip in the inward and outward directions of the cable joint.

[0016] In one embodiment, each of the cables includes three cores, and the cores of two cables opposite each other are connected by a connecting tube, and a temperature measuring chip is embedded in each connecting tube.

[0017] Each of the connecting pipes is sequentially fitted with an intermediate connector body and a shielding mesh, and a radio frequency signal transceiver is provided between the intermediate connector body and the shielding mesh outside each of the connecting pipes.

[0018] In one embodiment, the two ends of the intermediate connector body extend to cover the two cables respectively, and the two ends of the intermediate connector body are provided with sealing layers.

[0019] In one embodiment, the intermediate joint body is covered with an epoxy resin layer, or the outer periphery of the intermediate joint body is sequentially covered with a waterproof tape and an armor tape.

[0020] The present invention also proposes a temperature measurement system for cable intermediate joints, including a cable intermediate joint, a temperature acquisition device and a power supply device;

[0021] The cable intermediate joint includes a connecting pipe, an intermediate joint body, a shielding mesh, a temperature measuring chip, and a radio frequency signal transceiver device.

[0022] The connecting tube is used to connect the cores of the two cables;

[0023] The main body of the intermediate joint is sleeved around the outer periphery of the connecting pipe;

[0024] The shielding mesh is fitted around the outer perimeter of the intermediate joint body;

[0025] The temperature sensing chip is embedded in the connecting tube;

[0026] A radio frequency signal transceiver is located between the intermediate connector body and the shielding mesh. The radio frequency signal transceiver is used to receive data from the temperature measuring chip and transmit it to the back-end system.

[0027] The temperature acquisition device is connected to the radio frequency signal transceiver of the cable intermediate joint via a radio frequency connection cable to collect data from the temperature measuring chip of the cable intermediate joint and transmit it to the background system.

[0028] The power supply device is mounted on the cable and is used to power the temperature acquisition device.

[0029] In one embodiment, the cable joint temperature measurement system further includes a data transmission unit electrically connected to the temperature acquisition device for transmitting the acquired data to the back-end system via wireless communication technology.

[0030] In one embodiment, the power supply device includes a ring-shaped power supply CT, and the cable intermediate joint temperature measurement system further includes a dedicated power supply and a backup power supply that are electrically connected to each other. The input end of the dedicated power supply is electrically connected to the power supply CT, and the output end of the dedicated power supply is electrically connected to the temperature acquisition unit and the data transmission unit.

[0031] In one embodiment, the cable joint temperature measurement system further includes a data central box located outside the cable joint, and the dedicated power supply, the backup power supply, the temperature acquisition device, and the data transmission unit are installed inside the data central box.

[0032] In one embodiment, the cable joint temperature measurement system further includes a fiber optic converter electrically connected to the temperature acquisition unit. The fiber optic converter has a fiber optic output section that extends to the outside of the cable joint and is electrically connected to the back-end system.

[0033] In one embodiment, the fiber optic converter and the temperature sensor are installed inside the cable intermediate joint.

[0034] This invention also proposes a connection method for a cable intermediate joint temperature measurement system, which includes the following steps:

[0035] The wire cores at the ends of the two cables are crimped together using a connecting tube;

[0036] The temperature sensing chip is embedded in a groove on the outer wall of the connecting tube;

[0037] The intermediate joint body is contracted outside the connecting pipe, so that both ends of the intermediate joint body extend to cover the two cables respectively;

[0038] The radio frequency signal transceiver is fixed to the outer wall of the intermediate connector body.

[0039] In one embodiment, the step of fixing the radio frequency signal transceiver to the outer wall of the intermediate connector body specifically includes:

[0040] The radio frequency transceiver is fixed to the outer wall of the intermediate connector body, and the radio frequency transceiver is positioned directly facing the temperature measuring chip.

[0041] In one embodiment, the connection method of the cable intermediate joint temperature measurement system further includes the step of:

[0042] Connect the radio frequency signal transceiver to the temperature acquisition unit via a radio frequency cable;

[0043] The ring-shaped power-collecting CT is mounted on the cable, and the ring-shaped power-collecting CT is connected to the temperature acquisition device via a wire.

[0044] In one embodiment, after the step of connecting the radio frequency signal transceiver to the temperature acquisition device via a radio frequency connection cable, the method further includes:

[0045] The temperature sensor and the fiber optic converter are connected by a circuit, so that the temperature sensor and the fiber optic converter are sealed inside the intermediate connector, and the fiber optic output section of the fiber optic converter extends to the outside of the intermediate connector.

[0046] In one embodiment, the connection method of the cable intermediate joint temperature measurement system further includes the step of:

[0047] Connect the radio frequency signal transceiver to the temperature acquisition unit via a radio frequency cable;

[0048] The ring-shaped power-collecting CT is sleeved on the cable, so that the ring-shaped power-collecting CT is connected to the input terminal of the dedicated power supply.

[0049] The temperature acquisition unit and the data transmission unit are connected by a circuit, so that the output of the dedicated power supply is connected to the temperature acquisition unit and the data transmission unit respectively.

[0050] In one embodiment, after the step of fitting the ring-shaped power-collecting CT onto the cable so that the ring-shaped power-collecting CT is connected to the input terminal of the dedicated power supply, the method further includes:

[0051] This allows the dedicated power supply and the backup power supply to be connected via a circuit.

[0052] In one embodiment, the step of connecting the temperature sensor and the data transmission unit via a circuit, such that the output terminal of the dedicated power supply is connected to both the temperature sensor and the data transmission unit, specifically includes:

[0053] The temperature acquisition device is placed outside the cable mid-joint and connected to the data transmission unit via a circuit, so that the output of the dedicated power supply is connected to both the temperature acquisition device and the data transmission unit.

[0054] In one embodiment, after the step of fixing the radio frequency signal transceiver to the outer wall surface of the intermediate connector body, the method further includes:

[0055] A shielding mesh is installed over the main body of the intermediate connector, and the shielding mesh covers the radio frequency signal transceiver device.

[0056] Waterproof tape and armor tape are wrapped around the outside of the shielding mesh in sequence, or epoxy resin is injected into the outside of the shielding mesh.

[0057] This invention relates to a cable joint in which a temperature sensing chip is embedded within a connecting tube. The small size of the chip allows for more accurate temperature measurement of the connecting tube without affecting the internal electric field distribution. The measured temperature data can be wirelessly transmitted to an RF transceiver. The structure is simpler, more reliable, and easier to install. The RF transceiver is positioned between the joint body and the shielding mesh. It receives data from the temperature sensing chip and transmits it to the backend system. Since there is no shielding layer between the RF transceiver and the temperature sensing chip, the RF transceiver can accurately and stably receive the transmitted signal, enabling safer, more effective, and accurate measurement of the temperature of the internal conductors of the cable joint. Furthermore, by separating the temperature sensing chip and the RF transceiver, with the chip embedded within the connecting tube and the transceiver positioned on the outer wall of the joint body, the recessed area on the connecting tube is effectively reduced compared to embedding both components as a single unit. This improves the structural strength of the connecting tube. Attached Figure Description

[0058] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0059] Figure 1 This is a schematic diagram of a cable intermediate joint according to an embodiment of the present invention;

[0060] Figure 2 for Figure 1 A magnified view of a section at point A in the middle;

[0061] Figure 3 This is a schematic diagram of an embodiment of the cable joint temperature measurement system of the present invention;

[0062] Figure 4 for Figure 3 A magnified view of a section at point B in the middle;

[0063] Figure 5 for Figure 3 A partial structural diagram of the temperature measurement system for intermediate joints of medium-speed cables;

[0064] Figure 6 This is a schematic diagram of another embodiment of the cable joint temperature measurement system of the present invention;

[0065] Figure 7 This is a flowchart illustrating the connection method of the cable intermediate joint temperature measurement system of the present invention in the first embodiment.

[0066] Figure 8 This is a flowchart illustrating the connection method of the cable intermediate joint temperature measurement system of the present invention in a second embodiment.

[0067] Figure 9 This is a flowchart illustrating the third embodiment of the connection method for the cable intermediate joint temperature measurement system of the present invention;

[0068] Figure 10 This is a flowchart illustrating the fourth embodiment of the connection method for the cable intermediate joint temperature measurement system of the present invention;

[0069] Figure 11 This is a flowchart illustrating the fifth embodiment of the connection method for the cable intermediate joint temperature measurement system of the present invention;

[0070] Figure 12 This is a flowchart illustrating the sixth embodiment of the connection method for the cable intermediate joint temperature measurement system of the present invention.

[0071] Explanation of icon numbers:

[0072] label name label name label name 100 Cable joint 160 sealing layer 500 Dedicated power supply 110 Connecting pipe 170 epoxy resin layer 600 backup power 111 groove 180 Waterproof tape 700 Data concentrator 120 Intermediate joint body 190 Armor belt 800 Fiber Optic Converter 130 Shielding net 200 Temperature acquisition device 810 Fiber optic output section 140 Temperature sensing chip 300 Power supply device 900 cable 150 Radio frequency signal transceiver 400 Data transmission unit 910 wire core

[0073] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0074] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0075] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0076] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0077] This invention proposes a cable intermediate joint. The following description uses a 10kV cable intermediate joint as an example; intermediate joints for 6kV, 20kV, and 35kV cables can also refer to this embodiment. This cable intermediate joint can be a cold-shrinkable power cable intermediate joint or a heat-shrinkable power cable intermediate joint.

[0078] In embodiments of the present invention, such as Figures 1 to 4 , Figure 6 As shown, the cable intermediate joint 100 includes a connecting pipe 110, an intermediate joint body 120, a shielding mesh 130, a temperature measuring chip 140, and a radio frequency signal transceiver 150;

[0079] The connecting tube 110 is used to connect the wire cores 910 of the two cables 900;

[0080] The intermediate joint body 120 is sleeved around the connecting pipe 110;

[0081] 130 sets of shielding netting are installed around the main body 120 of the intermediate joint;

[0082] The temperature sensing chip 140 is embedded in the connecting tube 110;

[0083] The radio frequency signal transceiver 150 is located between the intermediate connector body 120 and the shielding mesh 130. The radio frequency signal transceiver 150 is used to receive data from the temperature measuring chip 140 and transmit it to the background system.

[0084] In this embodiment, the cable 900 can be a single-core cable 900, or a two-core cable 900, a three-core cable 900, a four-core cable 900, a five-core cable 900, etc. The conductor 910 can be any phase of the 10kV cable 900. When connecting two cables 900 using a cable joint 100, the insulation layer at the end of the cable 900 is first tapered to a certain size, exposing a certain size of the inner semiconductive layer. Then, a connecting tube 110 is used to crimp the conductors 910 of the two cables 900, forming a connected conductor to achieve an electrical connection between the two cables 900. After the connecting tube 110 crimps the conductors 910 of the two cables 900, the connecting tube 110 can be further polished to eliminate tip discharge. Subsequently, a semiconductor self-adhesive tape can be wrapped around the connecting tube 110, allowing the semiconductor self-adhesive tape to overlap from the inner semiconductive layer at the end of one cable 900 to the inner semiconductive layer at the end of the other cable 900. A filler adhesive is wound around the semiconductor self-adhesive tape, which fills the cone-shaped insulation layer of cable 900 until it is flush with the cylindrical surface of the insulation layer. Then, an insulating self-adhesive tape can be wound around the outside of the filler adhesive, so that the insulating self-adhesive tape overlaps the insulation layer of the end of one cable 900 onto the insulation layer of the end of the other cable 900.

[0085] The intermediate joint body 120 can specifically retract around the periphery of the connecting tube 110, that is, around the periphery of the insulating self-adhesive tape, so that both ends of the intermediate joint body 120 extend to cover the outer semiconductive layers of the two cables 900. The intermediate joint body 120 can specifically be a cold-shrink intermediate joint body 120. Optionally, the intermediate joint body 120 includes an insulating layer, an outer shielding layer, and stress cones, wherein the outer shielding layer is located outside the insulating layer, and the stress cones are located on the inner walls of both ends of the insulating layer. The shielding mesh 130 can specifically be a copper shielding mesh 130. This allows the two ends of the shielding mesh 130 to press against the copper shielding layer of the cable 900, which can be achieved by soldering or by fixing with constant force springs.

[0086] The temperature sensing chip 140 can have various shapes and can be designed according to actual needs; no specific limitation is made here. Specifically, the temperature sensing chip 140 can be embedded in the middle of the connecting tube 110, thus avoiding interference with the temperature sensing chip 140 when pressing the connecting tube 110. One or two temperature sensing chips 140 can be provided on the connecting tube 110. Using two temperature sensing chips 140 makes the acquired temperature data more accurate. In some embodiments, more than two temperature sensing chips 140 can be provided on the connecting tube 110. Specifically, the temperature sensing chip 140 can be embedded within the connecting tube 110 by creating a groove 111 in the connecting tube 110. By embedding the temperature sensing chip 140 inside the connecting tube 110, compared to placing the temperature sensing chip 140 on one side or outside the connecting tube 110, the temperature sensing chip 140 can directly contact the solid conductive part of the connecting tube 110, thus enabling more accurate measurement of the actual operating temperature at the connecting tube 110. Furthermore, the temperature sensing chip 140 is a wireless passive chip, which, compared to other temperature sensors, is small in size and can directly measure temperature without affecting the internal electric field distribution of the cable intermediate joint 100. It can also wirelessly transmit the measured temperature data to the radio frequency signal transceiver 150.

[0087] The radio frequency (RF) transceiver 150 may specifically include a wireless transceiver chip. The RF transceiver 150 can provide energy to the temperature sensing chip 140 while simultaneously receiving the chip's temperature signal and transmitting this temperature signal data to the backend system. The RF transceiver 150 can transmit the temperature signal to the backend system via a wired connection or wirelessly, depending on the specific requirements. By placing the RF transceiver 150 between the intermediate connector body 120 and the shielding mesh 130, the RF transceiver 150 is in close contact with the outer wall of the intermediate connector body 120, with no shielding layer obstructing the temperature sensing chip 140. This allows the RF transceiver 150 to more effectively receive the transmitted signal from the temperature sensing chip 140, resulting in more stable and accurate temperature measurement of the cable intermediate connector 100.

[0088] The cable intermediate joint 100 of the present invention incorporates a temperature sensing chip 140 embedded within a connecting tube 110. This results in a small-sized chip 140 that, without affecting the internal electric field distribution of the cable intermediate joint 100, can more accurately measure the temperature of the connecting tube 110 and wirelessly transmit the measured temperature data to an RF transceiver 150. The structure is simpler, more reliable, and easier to install. Furthermore, the RF transceiver 150 is positioned between the intermediate joint body 120 and the shielding mesh 130. The RF transceiver 150 receives data from the temperature sensing chip 140 and transmits it to the backend system. Since there is no shielding layer between the RF transceiver 150 and the temperature sensing chip 140, the RF transceiver 150 can accurately and stably receive the transmitted signal from the temperature sensing chip 140, thus enabling safer, more effective, and accurate measurement of the temperature of the internal core 910 of the cable intermediate joint 100. Furthermore, by separating the temperature sensing chip 140 from the radio frequency transceiver device 150, and embedding the temperature sensing chip 140 inside the connecting tube 110 while the radio frequency transceiver device 150 is disposed on the outer wall of the intermediate connector body 120, compared to embedding the temperature sensing chip 140 and the radio frequency transceiver device 150 as a whole in the connecting tube 110, the area of ​​the groove 111 on the connecting tube 110 can be effectively reduced, thereby improving the structural strength of the connecting tube 110.

[0089] In one embodiment, please refer to Figure 1 and Figure 2 A groove 111 is formed on the outer wall of the connecting tube 110, and the temperature sensing chip 140 is embedded in the groove 111. The outer wall of the temperature sensing chip 140 is flush with the outer wall of the connecting tube 110. By forming the groove 111 on the outer wall of the connecting tube 110, after the connecting tube 110 crimps the wire cores 910 of the two cables 900, the temperature sensing chip 140 can be directly embedded in the groove 111 of the connecting tube 110, making the overall installation simpler and faster. Making the outer wall of the temperature sensing chip 140 flush with the outer wall of the connecting tube 110 makes the overall surface flatter when the semiconductor self-adhesive tape is wrapped around the connecting tube 110, and also makes the electric field distribution more uniform.

[0090] Furthermore, the temperature sensing chip 140 is arranged in a sheet or block shape. The cross-section of the temperature sensing chip 140 can be rectangular, thus making it a square sheet or block shape. By arranging the temperature sensing chip 140 in a sheet or block shape, compared to arranging it in a ring shape, the volume of the temperature sensing chip 140 can be effectively reduced, thereby reducing the opening area of ​​the groove 111 on the connecting tube 110 and improving the structural strength of the connecting tube 110. In other embodiments, the temperature sensing chip 140 can also be arranged in a ring shape to be fitted around the outer periphery of the connecting tube 110.

[0091] In one embodiment, such as Figures 1 to 4 As shown, the radio frequency (RF) transceiver 150 is positioned corresponding to the temperature sensing chip 140 in the inward and outward directions of the cable joint 100. That is, in the radial direction of the cable joint 100, the RF transceiver 150 is positioned corresponding to the temperature sensing chip 140. This arrangement ensures that the RF transceiver 150 is directly opposite the temperature sensing chip 140, minimizing the distance between them. Consequently, the RF transceiver 150 receives a stronger signal from the temperature sensing chip 140 in the shortest possible time, resulting in faster overall temperature measurement and a more sensitive temperature measurement system.

[0092] In one embodiment, please refer to Figure 3 , Figure 4 and Figure 6 Each cable 900 includes three wire cores 910. The wire cores 910 of two cables 900 are connected by a connecting tube 110. A temperature measuring chip 140 is embedded in each connecting tube 110.

[0093] Each connecting pipe 110 is fitted with an intermediate connector body 120 and a shielding mesh 130 in sequence. A radio frequency signal transceiver device 150 is provided between the intermediate connector body 120 and the shielding mesh 130 outside each connecting pipe 110.

[0094] In this embodiment, the cable 900 is specifically a three-core cable 900. A temperature sensing chip 140 is installed at each joint of the three-core cable 900, allowing for individual measurement of the temperature of the connecting tube 110 of the three cores 910, resulting in more accurate temperature data for the entire cable intermediate joint 100. The three cores 910 at the ends of the two cables 900 are connected by connecting tubes 110, with each connecting tube 110 sequentially fitted with an intermediate joint body 120 and a shielding mesh 130, meaning each connected core 910 is individually connected. By providing a radio frequency signal transceiver 150 between the intermediate joint body 120 and the shielding mesh 130 outside each connecting pipe 110, that is, each phase of the cable 900 is provided with a temperature measuring chip 140 and a radio frequency signal transceiver 150, the radio frequency signal transceiver 150 can receive the transmitted data of its corresponding temperature measuring chip 140 separately, and transmit the temperature data separately or together to the background system, thereby obtaining the actual operating temperature of the connecting pipe 110 at the joint of each phase core 910, which is convenient for accurately monitoring the real-time internal temperature of the cable intermediate joint 100.

[0095] In practice, such as Figure 4 As shown, the two ends of the intermediate connector body 120 extend to cover the two cables 900 respectively, and the two ends of the intermediate connector body 120 are provided with sealing layers 160.

[0096] In this embodiment, the sealing layer 160 may specifically include sealant and waterproof tape. This involves wrapping sealant and waterproof tape sequentially around the connection points between both ends of the intermediate connector body 120 and the outer semiconductive layer. This achieves an internal seal for the intermediate connector body 120, preventing moisture from entering and severely impacting the lifespan of the temperature sensing chip 140, and also blocking moisture inside the intermediate connector body 120, reducing the impact of moisture on electrical components such as the radio frequency signal transceiver device 150.

[0097] Specifically, the intermediate joint body 120 is covered with a waterproof layer, which can be an epoxy resin layer 170 or a waterproof strip 180. Please refer to... Figure 3 and Figure 4 In one embodiment, the intermediate joint body 120 is covered with an epoxy resin layer 170. In this case, a PE (polyethylene) bag can be placed over the intermediate joint body 120, and epoxy resin can be poured through an opening in the PE bag to form the covering epoxy resin layer 170 on the outside of the intermediate joint body 120. This increases the mechanical strength and external explosion-proof performance of the cable intermediate joint 100. Specifically, both ends of the epoxy resin layer 170 extend to cover the outer sheaths of the two cables 900.

[0098] In another embodiment, such as Figure 6 As shown, the outer perimeter of the intermediate joint body 120 is sequentially covered with a waterproof tape 180 and an armor tape 190. One layer of waterproof tape 180 or two layers of waterproof tape 180 can be used to cover the outer perimeter of the intermediate joint body 120. To improve the overall waterproof performance of the cable intermediate joint 100, optionally, two layers of waterproof tape 180 and armor tape 190 are sequentially covered on the outer perimeter of the intermediate joint body 120. Specifically, the two ends of the inner waterproof tape 180 extend to cover the inner sheath of the two cables 900, the two ends of the outer waterproof tape 180 extend to cover the outer sheath of the two cables 900, and the two ends of the armor tape 190 extend to cover the outer sheath of the two cables 900. By providing waterproof tape 180 and armor tape 190 on the outer perimeter of the intermediate joint body 120, the waterproof performance and mechanical strength of the entire intermediate joint body 120 can be improved.

[0099] This invention also proposes a temperature measurement system for cable intermediate joints, please refer to... Figures 3 to 6The cable joint temperature measurement system includes a temperature acquisition unit 200, a power supply device 300, and a cable joint 100. The specific structure of the cable joint 100 is as described in the above embodiments. The temperature acquisition unit 200 is connected to the radio frequency signal transceiver 150 of the cable joint 100 via an radio frequency connection cable to collect data from the temperature measurement chip 140 of the cable joint 100 and transmit it to the backend system. The power supply device 300 is mounted on the cable 900 and is used to power the temperature acquisition unit 200. Since this cable joint temperature measurement system adopts all the technical solutions of all the above embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments.

[0100] In this embodiment, specifically, the intermediate joint body 120 is covered with a waterproof layer, and the temperature acquisition device 200 is disposed inside the waterproof layer of the cable intermediate joint 100 or outside the cable intermediate joint 100. The temperature acquisition device 200 receives and processes the temperature signal sent by the radio frequency signal transceiver 150 through the radio frequency connection line, and can send the signal to the backend system in wired or wireless manner as needed. It is understood that the temperature acquisition device 200 can also power the radio frequency signal transceiver 150 through the radio frequency connection line. By connecting the temperature acquisition device 200 and the radio frequency signal transceiver 150 through the radio frequency connection line, compared with wireless transmission, interference from shielding layers can be avoided, thereby making the data transmission of the entire temperature measurement system more stable. The power supply device 300 can be sleeved on any phase of the cable 900 to power the temperature acquisition device 200. By setting up a power-taking device 300 to draw power from the cable 900 to power the temperature sensor 200, the power supply problem of the temperature sensor 200 is solved, allowing the temperature sensor 200 to be flexibly configured to adapt to different field requirements. The power-taking device 300 may specifically include a ring-shaped current transformer (CT), which is fitted onto any phase of the cable 900 to obtain current and power the temperature sensor 200. In other embodiments, the temperature sensor 200 can also be powered by an additional power supply.

[0101] The temperature sensor 200 and the radio frequency transceiver 150 can be installed separately or as a single unit. Optionally, the temperature sensor 200 and the radio frequency transceiver 150 can be installed separately. This makes the radio frequency transceiver 150 smaller, making it easier to install it outside the intermediate connector body 120 at the position corresponding to the temperature sensing chip 140, thus ensuring stable signal reception. Furthermore, by installing the temperature sensor 200 and the radio frequency transceiver 150 in different locations, the temperature sensor 200 can be installed outside or inside the cable intermediate connector 100, depending on actual needs.

[0102] The cable joint temperature measurement system of this invention embeds a temperature measuring chip 140 within the connecting pipe 110 of the cable joint 100, and simultaneously places a radio frequency (RF) transceiver 150 between the joint body 120 and the shielding mesh 130. A temperature acquisition device 200 and the RF transceiver 150 are connected via an RF cable to collect data from the temperature measuring chip 140 of the cable joint 100 and transmit it to the backend system. A power supply device 300 is mounted on the cable 900 to power the temperature acquisition device 200. Thus, the temperature measuring chip 140 can accurately measure the temperature at the core 910 of the cable joint 100 without affecting the internal electric field distribution, and the temperature measuring chip 140 and the RF transceiver 150 do not damage the insulation level of the entire cable joint 100. This makes the temperature measurement of the internal chip of the cable joint 100 faster, safer, and more effective.

[0103] In one embodiment, such as Figure 3 and Figure 5 As shown, the cable joint temperature measurement system also includes a data transmission unit 400, which is electrically connected to the temperature acquisition unit 200 to transmit the acquired data to the background system via wireless communication technology.

[0104] In this embodiment, the data transmission unit 400 (DTU) and the temperature acquisition device 200 are electrically connected via a wire. The temperature acquisition device 200 collects signals sent from the radio frequency signal transceiver 150 and transmits these signals to the data transmission unit 400, and then transmits them to the backend system using 2G or 4G wireless communication technology. By transmitting the data collected by the temperature acquisition device 200 to the backend system via wireless communication technology, the operating parameters of the cable 900 can be remotely monitored online, and the number of wiring connections can be reduced compared to wired transmission.

[0105] Further, please refer to Figure 3 The power supply device 300 includes a ring-shaped power supply CT. The cable intermediate joint temperature measurement system also includes a dedicated power supply 500 and a backup power supply 600 that are electrically connected to each other. The input end of the dedicated power supply 500 is electrically connected to the power supply CT, and the output end of the dedicated power supply 500 is electrically connected to the temperature acquisition device 200 and the data transmission unit 400.

[0106] In this embodiment, the power-collecting CT is specifically an open ring, which can be fitted onto the copper shielding layer of the cable 900 through the opening. By electrically connecting the input terminal of the dedicated power supply 500 to the power-collecting CT, the dedicated power supply 500 can act as a voltage regulator, controlling the current obtained by the power-collecting CT and converting it into a controllable and stable output required by the target application. By electrically connecting the output terminal of the dedicated power supply 500 to the temperature acquisition device 200 and the data transmission unit 400, the dedicated power supply 500 can stably output the electrical energy obtained from the power-collecting CT to the temperature acquisition device 200 and the data transmission unit 400. By setting a backup power supply 600 and electrically connecting the backup power supply 600 to the dedicated power supply 500, the backup power supply 600 can obtain and store electrical energy from the dedicated power supply 500, thus providing continuous power to the entire system during power outages. The duration of the backup power supply can be set according to requirements or standards, for example, 12 hours. The dedicated power supply 500, backup power supply 600, temperature acquisition device 200, and data transmission unit 400 can be placed in the acquisition box outside the cable joint 100 according to the actual situation, or they can be sealed inside the waterproof layer of the cable joint 100.

[0107] Based on the above embodiments, please further refer to the following: Figure 5 The cable joint temperature measurement system also includes a data centralization box 700, which is located outside the cable joint 100. A dedicated power supply 500, a backup power supply 600, a temperature acquisition device 200, and a data transmission unit 400 are installed inside the data centralization box 700. By placing the dedicated power supply 500, backup power supply 600, temperature acquisition device 200, and data transmission unit 400 in the data centralization box 700 outside the cable joint 100, the size of the cable joint 100 can be reduced, and subsequent maintenance and repair can be made easier.

[0108] In one embodiment, such as Figure 6 As shown, the cable joint temperature measurement system also includes a fiber optic converter 800, which is electrically connected to the temperature acquisition unit 200. The fiber optic converter 800 has a fiber optic output section 810 that extends to the outside of the cable joint 100 and is electrically connected to the backend system. By using the fiber optic converter 800, the data collected by the temperature acquisition unit 200 can be converted by the fiber optic converter 800 and transmitted to the backend system through the fiber optic output. Compared with wireless data transmission, fiber optic signals are not affected by electromagnetic interference, ensuring the accuracy of signal transmission and providing strong anti-interference capabilities.

[0109] Furthermore, the fiber optic converter 800 and temperature sensor 200 are installed inside the cable joint 100. By embedding the fiber optic converter 800 and temperature sensor 200 inside the waterproof layer of the cable joint 100, with only the fiber optic output section 810 extending from inside the cable joint 100, the fiber optic signal is not affected by electromagnetic interference, ensuring accurate signal transmission and strong anti-interference capability, enabling it to cope with various complex environments. Moreover, there is no need to install an additional data central box 700 outside the cable joint 100 to install the fiber optic converter 800 and temperature sensor 200, thus saving costs. In other embodiments, the fiber optic converter 800 and temperature sensor 200 can also be located outside the cable joint 100.

[0110] This invention also proposes a connection method for a cable joint temperature measurement system, which can be referred to in the above embodiments. Wherein, as... Figure 7 As shown, the connection method of the cable joint temperature measurement system includes the following steps:

[0111] Step S10: Crim the wire cores 910 at the ends of the two cables 900 using the connecting tube 110;

[0112] In this embodiment, before crimping the cores 910 at the ends of the two cables 900 using the connecting tube 110, the sheaths and shielding layers at the ends of the two cables 900 need to be conventionally treated. The insulation layers at the ends of the two cables 900 are shaped into cones of a certain size, exposing a certain size of the inner semiconductive layer. Then, the connecting tube 110 is fitted onto the cores 910 of the two cable 900 modules and crimped to form a connected conductor, thereby achieving an electrical connection between the two cables 900. Specifically, the connecting tube 110 can also be polished to eliminate tip discharge.

[0113] Step S20: The temperature measuring chip 140 is embedded in the groove 111 on the outer wall of the connecting tube 110.

[0114] Specifically, the outer wall surface of the temperature sensing chip 140 can be flush with the outer wall surface of the connecting tube 110. After the temperature sensing chip 140 is embedded in the groove 111 on the outer wall surface of the connecting tube 110, a semiconductor self-adhesive tape can be wrapped around the outside of the connecting tube 110 to secure the temperature sensing chip 140 within the groove 111. The semiconductor self-adhesive tape overlaps from the inner semiconductive layer at the end of one cable 900 to the inner semiconductive layer at the end of the other cable 900. A filler adhesive is wrapped around the semiconductor self-adhesive tape, which fills the cone-shaped insulation layer of the cable 900 until it is flush with the cylindrical surface of the insulation layer. Then, an insulating self-adhesive tape can be wrapped around the filler adhesive, overlapping from the insulation layer at the end of one cable 900 to the insulation layer at the end of the other cable 900. This achieves internal waterproofing of the cable joint 100, preventing moisture from entering the temperature sensing chip 140 and affecting its service life.

[0115] Step S30: Shrink the intermediate joint body 120 outside the connecting pipe 110, so that both ends of the intermediate joint body 120 extend to cover the two cables 900 respectively.

[0116] Specifically, the two ends of the intermediate connector body 120 extend to cover the outer semiconductive layers of the two cables 900, and sealant and waterproof tape are wrapped sequentially at the connection points between the two ends of the intermediate connector body 120 and the outer semiconductive layers. This achieves an internal seal for the intermediate connector body 120, preventing moisture from entering and severely affecting the lifespan of the temperature sensing chip 140, and also blocking moisture inside the intermediate connector body 120, reducing the impact of moisture on electrical components such as the radio frequency signal transceiver device 150.

[0117] Step S40: Fix the radio frequency signal transceiver 150 to the outer wall of the intermediate connector body 120.

[0118] Specifically, the radio frequency signal transceiver 150 can be fixed to the outer wall of the intermediate connector body 120 using tape.

[0119] The connection method of the cable joint temperature measurement system of the present invention involves crimping the cores 910 at the ends of two cables 900 using a connecting tube 110, embedding the temperature measuring chip 140 in the groove 111 on the outer wall of the connecting tube 110, shrinking the joint body 120 outside the connecting tube 110 so that both ends of the joint body 120 extend and cover the two cables 900 respectively, and fixing the radio frequency signal transceiver 150 to the outer wall of the joint body 120. This allows for the installation of the temperature measuring device built into the joint body 120, with fewer connection steps and a simple and quick installation method.

[0120] Further, please refer to Figure 8The specific steps for fixing the radio frequency signal transceiver 150 to the outer wall of the intermediate connector body 120 are as follows:

[0121] Step S41: Fix the radio frequency signal transceiver 150 on the outer wall of the intermediate connector body 120, and set the radio frequency signal transceiver 150 facing the temperature measuring chip 140.

[0122] In this embodiment, a mark can be set on the intermediate connector body 120 corresponding to the temperature sensing chip 140 to facilitate the wiring personnel in fixing the radio frequency transceiver device 150 to the outer wall of the intermediate connector body 120 facing the temperature sensing chip 140. Alternatively, the wiring personnel can visually align the radio frequency transceiver device 150 with the temperature sensing chip 140. By aligning the radio frequency transceiver device 150 with the temperature sensing chip 140, the distance between them is minimized, resulting in a stronger signal received by the radio frequency transceiver device 150 and a shorter signal reception time. This leads to a faster overall temperature measurement speed and a more sensitive temperature measurement system.

[0123] In one embodiment, such as Figure 9 As shown, the connection method of the cable intermediate joint temperature measurement system also includes the following steps:

[0124] Step S50: Connect the radio frequency signal transceiver 150 to the temperature acquisition unit 200 via a radio frequency connection cable;

[0125] Step S61: Place the ring-shaped power-collecting CT onto the cable 900, and connect the ring-shaped power-collecting CT to the temperature acquisition device 200 via a wire.

[0126] In this embodiment, step S50 can be performed before, after, or simultaneously with step S40. If the sidewall of the ring-shaped power-taking CT has an opening, the ring-shaped power-taking CT can be fitted onto the copper shielding layer of any phase cable 900 through this opening. In this case, step S61 can be performed before or after any step in the entire connection method. If the ring-shaped power-taking CT is not an open ring, then step S61 is performed before step S10. The temperature sensor 200 can be located inside or outside the cable intermediate joint 100.

[0127] By connecting the temperature acquisition unit 200 to the radio frequency signal transceiver 150 via an radio frequency connection cable, interference from shielding layers and other factors can be avoided compared to wireless transmission, thus making the data transmission of the entire temperature measurement system more stable. By mounting a ring-shaped power-collecting CT on the cable 900 and connecting the ring-shaped power-collecting CT to the temperature acquisition unit 200 via a wire, power can be drawn from the cable 900 to power the temperature acquisition unit 200, solving the power supply problem and allowing for flexible configuration to adapt to different field requirements.

[0128] In one embodiment, please refer to Figure 10 After the step of connecting the radio frequency signal transceiver 150 to the temperature acquisition device 200 via an radio frequency connection cable, the following is also included:

[0129] Step S71: Connect the temperature sensor 200 and the fiber optic converter 800 through a circuit, so that the temperature sensor and the fiber optic converter 800 are sealed inside the intermediate connector, and extend the fiber optic output section 810 of the fiber optic converter 800 to the outside of the intermediate connector.

[0130] In this embodiment, step S71 should be performed before steps S91 and S92, so that the temperature sensor and fiber optic converter 800 can be sealed inside the waterproof layer of the intermediate joint. By setting up the fiber optic converter 800, the data collected by the temperature acquisition device 200 can be converted by the fiber optic converter 800 and transmitted to the backend system through the fiber optic output end. Compared with wireless data transmission, the fiber optic signal is not affected by electromagnetic fields, ensuring the accuracy of signal transmission and having strong anti-interference capability. Furthermore, by embedding the fiber optic converter 800 and the temperature acquisition device 200 inside the waterproof layer of the cable intermediate joint 100, with only the fiber optic output section 810 protruding from the cable intermediate joint 100, it can cope with various complex environments. Moreover, there is no need to set up an additional data collection box 700 outside the cable intermediate joint 100 to install the fiber optic converter 800 and the temperature acquisition device 200, thereby saving costs.

[0131] In another embodiment, such as Figure 9 and Figure 10 As shown, the connection method of the cable intermediate joint temperature measurement system also includes the following steps:

[0132] Step S50: Connect the radio frequency signal transceiver 150 to the temperature acquisition unit 200 via a radio frequency connection cable;

[0133] Step S62: Place the ring-shaped power CT onto the cable 900 so that the ring-shaped power CT is connected to the input terminal of the dedicated power supply 500.

[0134] Step S72: Connect the temperature acquisition device 200 and the data transmission unit 400 through a circuit, so that the output terminal of the dedicated power supply 500 is connected to the temperature acquisition device 200 and the data transmission unit 400 respectively.

[0135] In this embodiment, by electrically connecting the input terminal of the dedicated power supply 500 to the power-collecting CT, the dedicated power supply 500 can act as a voltage regulator, controlling the current obtained by the power-collecting CT and converting it into a controllable and stable output required by the target application. By electrically connecting the output terminal of the dedicated power supply 500 to the temperature acquisition unit 200 and the data transmission unit 400, the dedicated power supply 500 can stably output the electrical energy obtained from the power-collecting CT to the temperature acquisition unit 200 and the data transmission unit 400. The dedicated power supply 500, temperature acquisition unit 200, and data transmission unit 400 can be placed in a data acquisition box outside the cable joint 100, or sealed inside the waterproof layer of the cable joint 100, depending on the actual situation. The data transmission unit 400 (DTU) is electrically connected to the temperature acquisition unit 200 via a wire. The temperature acquisition unit 200 collects signals sent from the radio frequency transceiver 150, transmits these signals to the data transmission unit 400, and then transmits them to the backend system using 2G or 4G wireless communication technology. By transmitting the data collected by the temperature acquisition device 200 to the back-end system via wireless communication technology, the operating parameters of the cable 900 can be remotely monitored online, and the number of lines can be reduced compared to wired transmission.

[0136] Further, please refer to Figure 10 The step of fitting the ring-shaped power-collecting CT onto the cable 900, thereby connecting the ring-shaped power-collecting CT to the input terminal of the dedicated power supply 500, further includes:

[0137] Step S73: Connect the dedicated power supply 500 and the backup power supply 600 through a circuit.

[0138] In this embodiment, by setting up a backup power supply 600 and electrically connecting it to the dedicated power supply 500, the backup power supply 600 can obtain and store electrical energy from the dedicated power supply 500, thus providing continuous power to the entire system during a power outage. The duration of the backup power supply can be set according to requirements or standards, for example, 12 hours.

[0139] Specifically, such as Figure 11 As shown, the steps of connecting the temperature acquisition unit 200 and the data transmission unit 400 via a circuit, so that the output terminal of the dedicated power supply 500 is connected to the temperature acquisition unit 200 and the data transmission unit 400 respectively, specifically include:

[0140] Step S721: Place the temperature acquisition device 200 outside the cable intermediate joint 100 and connect it to the data transmission unit 400 through a circuit, so that the output terminal of the dedicated power supply 500 is connected to the temperature acquisition device 200 and the data transmission unit 400 respectively.

[0141] In this embodiment, the cable joint temperature measurement system includes a data centralization box 700 located outside the cable joint 100. A dedicated power supply 500, a backup power supply 600, a temperature acquisition device 200, and a data transmission unit 400 are installed inside the data centralization box 700. By placing the dedicated power supply 500, backup power supply 600, temperature acquisition device 200, and data transmission unit 400 in the data centralization box 700 outside the cable joint 100, and placing the temperature acquisition device 200 outside the cable joint 100, the size of the cable joint 100 can be reduced, and subsequent maintenance and repair can be facilitated.

[0142] In one embodiment, please refer to Figure 12 After the step of fixing the radio frequency signal transceiver 150 to the outer wall of the intermediate connector body 120, the method further includes:

[0143] Step S80: Install a shielding mesh 130 over the intermediate connector body 120, so that the shielding mesh 130 covers the radio frequency signal transceiver device 150.

[0144] Step S91: Wrap waterproof tape 180 and armor tape 190 around the outside of the shielding mesh 130 in sequence; or,

[0145] Step S92: Inject epoxy resin onto the outside of the shielding mesh 130.

[0146] In this embodiment, a waterproof tape 180 and an armor tape 190 are sequentially wrapped around the periphery of the intermediate joint body 120. One layer of waterproof tape 180 or two layers of waterproof tape 180 can be used to cover the periphery of the intermediate joint body 120. To improve the overall waterproof performance of the cable intermediate joint 100, optionally, two layers of waterproof tape 180 and armor tape 190 are sequentially covered around the periphery of the intermediate joint body 120. Specifically, the two ends of the inner waterproof tape 180 extend to cover the inner sheath of the two cables 900, the two ends of the outer waterproof tape 180 extend to cover the outer sheath of the two cables 900, and the two ends of the armor tape 190 extend to cover the outer sheath of the two cables 900. By providing waterproof tape 180 and armor tape 190 around the periphery of the intermediate joint body 120, the waterproof performance and mechanical strength of the entire intermediate joint body 120 can be improved.

[0147] The intermediate joint body 120 is covered with an epoxy resin layer 170. At this time, a PE (polyethylene) bag can be placed over the intermediate joint body 120, and epoxy resin can be poured through an opening in the PE bag to form the covering epoxy resin layer 170 on the outside of the intermediate joint body 120. This increases the mechanical strength and external explosion-proof performance of the cable intermediate joint 100. Specifically, both ends of the epoxy resin layer 170 extend to cover the outer sheaths of the two cables 900.

[0148] The above are merely preferred embodiments of the present invention and do not limit the scope of the patent. Any equivalent structural transformations made using the contents of the specification and drawings of the present invention under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the scope of patent protection of the present invention.

Claims

1. A cable intermediate joint, used in a cable intermediate joint temperature measurement system, characterized in that, include: A connecting tube, used to connect the cores of two cables; The main body of the intermediate joint is sleeved around the outer periphery of the connecting pipe; A shielding mesh is fitted around the outer perimeter of the intermediate joint body; The temperature sensing chip is embedded in the connecting tube; as well as A radio frequency signal transceiver is disposed between the intermediate connector body and the shielding mesh. The radio frequency signal transceiver is used to receive data from the temperature measuring chip and transmit it to the background system. The temperature sensing chip is a wireless passive chip; The outer wall of the connecting tube is provided with a groove, and the temperature measuring chip is embedded in the groove. The outer wall of the temperature measuring chip is flush with the outer wall of the connecting tube. The cable joint temperature measurement system includes a temperature acquisition device and a power supply device. The temperature acquisition device is connected to the radio frequency signal transceiver via a radio frequency connection cable. The power supply device is sleeved on the cable to supply power to the temperature acquisition device. The temperature acquisition device and the radio frequency signal transceiver are either separately or integrated; The temperature measuring chip is arranged in a sheet or block shape; The intermediate joint body is covered with an epoxy resin layer, or the outer periphery of the intermediate joint body is sequentially covered with a waterproof tape and an armor tape. The power supply device includes a ring-shaped power supply CT. The cable intermediate joint temperature measurement system also includes a dedicated power supply and a backup power supply that are electrically connected to each other. The input end of the dedicated power supply is electrically connected to the power supply CT, and the output end of the dedicated power supply is electrically connected to the temperature acquisition unit and the data transmission unit. The cable joint temperature measurement system also includes an optical fiber converter, which is electrically connected to the temperature acquisition unit. The optical fiber converter has an optical fiber output section that extends to the outside of the cable joint and is electrically connected to the back-end system.

2. The cable joint as described in claim 1, characterized in that, The radio frequency signal transceiver is positioned corresponding to the temperature measuring chip in both the inner and outer directions of the cable joint.

3. The cable joint as described in claim 1, characterized in that, Each of the cables includes three cores, and the cores of two cables that are opposite to each other are connected by a connecting tube. Each connecting tube is embedded with a temperature measuring chip. Each of the connecting pipes is sequentially fitted with an intermediate connector body and a shielding mesh, and a radio frequency signal transceiver is provided between the intermediate connector body and the shielding mesh outside each of the connecting pipes.

4. The cable joint as described in claim 1, characterized in that, The two ends of the intermediate connector body extend to cover the two cables respectively, and the two ends of the intermediate connector body are provided with sealing layers.

5. A temperature measurement system for cable joints, characterized in that, include: The cable joint as described in any one of claims 1 to 4; A temperature acquisition device is connected to the radio frequency signal transceiver of the cable intermediate joint via a radio frequency connection cable to collect data from the temperature measuring chip of the cable intermediate joint and transmit it to the background system. as well as A power-generating device is mounted on a cable and is used to power the temperature acquisition device.

6. The cable joint temperature measurement system as described in claim 5, characterized in that, The cable joint temperature measurement system also includes a data transmission unit, which is electrically connected to the temperature acquisition unit to transmit the acquired data to the back-end system via wireless communication technology.

7. The cable joint temperature measurement system as described in claim 5, characterized in that, The cable joint temperature measurement system also includes a data central box, which is located outside the cable joint. The dedicated power supply, the backup power supply, the temperature acquisition device, and the data transmission unit are installed inside the data central box.

8. The cable joint temperature measurement system as described in claim 7, characterized in that, The fiber optic converter and the temperature sensor are installed inside the cable intermediate joint.

9. A connection method for a temperature measurement system for a cable intermediate joint, characterized in that, Includes the following steps: The wire cores at the ends of the two cables are crimped together using a connecting tube; The temperature sensing chip is embedded in a groove on the outer wall of the connecting tube; The intermediate joint body is contracted outside the connecting pipe, so that both ends of the intermediate joint body extend to cover the two cables respectively; The radio frequency signal transceiver is fixed to the outer wall of the intermediate connector body; The connection method of the cable intermediate joint temperature measurement system also includes the following steps: Connect the radio frequency signal transceiver to the temperature acquisition unit via a radio frequency cable; The ring-shaped power-collecting CT is mounted on the cable, and the ring-shaped power-collecting CT is connected to the temperature acquisition device via a wire; After the step of connecting the radio frequency signal transceiver to the temperature acquisition device via a radio frequency connection cable, the following is also included: The temperature sensor and the fiber optic converter are connected by a circuit, so that the temperature sensor and the fiber optic converter are sealed inside the intermediate connector, and the fiber optic output section of the fiber optic converter extends to the outside of the intermediate connector.

10. The connection method of the cable intermediate joint temperature measurement system as described in claim 9, characterized in that, The specific steps for fixing the radio frequency signal transceiver to the outer wall of the intermediate connector body are as follows: The radio frequency transceiver is fixed to the outer wall of the intermediate connector body, and the radio frequency transceiver is positioned directly facing the temperature measuring chip.

11. The connection method of the cable intermediate joint temperature measurement system as described in claim 9, characterized in that, The connection method of the cable intermediate joint temperature measurement system also includes the following steps: Connect the radio frequency signal transceiver to the temperature acquisition unit via a radio frequency cable; The ring-shaped power-collecting CT is sleeved on the cable, so that the ring-shaped power-collecting CT is connected to the input terminal of the dedicated power supply. The temperature acquisition unit and the data transmission unit are connected by a circuit, so that the output of the dedicated power supply is connected to the temperature acquisition unit and the data transmission unit respectively.

12. The connection method of the cable intermediate joint temperature measurement system as described in claim 11, characterized in that, The step of fitting the ring-shaped power-collecting CT onto the cable and connecting the ring-shaped power-collecting CT to the input terminal of the dedicated power supply further includes: This allows the dedicated power supply and the backup power supply to be connected via a circuit.

13. The connection method of the cable intermediate joint temperature measurement system as described in claim 11, characterized in that, The step of connecting the temperature acquisition device and the data transmission unit via a circuit, so that the output terminal of the dedicated power supply is connected to the temperature acquisition device and the data transmission unit respectively, specifically includes: The temperature acquisition device is placed outside the cable mid-joint and connected to the data transmission unit via a circuit, so that the output of the dedicated power supply is connected to both the temperature acquisition device and the data transmission unit.

14. The connection method of the cable intermediate joint temperature measurement system as described in any one of claims 9 to 13, characterized in that, After the step of fixing the radio frequency signal transceiver to the outer wall of the intermediate connector body, the following is also included: A shielding mesh is installed over the main body of the intermediate connector, and the shielding mesh covers the radio frequency signal transceiver device. Waterproof tape and armor tape are wrapped around the outside of the shielding mesh in sequence, or epoxy resin is injected into the outside of the shielding mesh.

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