Cable on-line monitoring device based on temperature sensor

Abstract

The present application relates to the technical fields of temperature measurement, in particular to a cable on-line monitoring device based on temperature sensor, which comprises a connecting pipe and cable heads to be connected at both ends of the connecting pipe, characterized in that: a ring-shaped heat conduction ring channel is formed in the wall of the connecting pipe, a containing part is arranged in the middle of the connecting pipe, a storage assembly for extruding and flowing heat-conducting liquid metal through the connection of the cable heads is arranged in the containing part, and the heat conduction ring channel and the containing part jointly form a heat conduction channel; a mounting cover is arranged at the center of the connecting pipe and is communicated with the heat conduction ring channel, a temperature sensor body is arranged on the mounting cover, a detection end of the temperature sensor body is arranged to be in communication with the heat conduction ring channel and the containing part through elastic stretching and contraction, and a control assembly for controlling the stretching and contraction of the detection end through the expansion of the liquid metal is arranged in the mounting cover; the ring-shaped heat conduction channel and the central containing part are arranged in the connecting pipe and filled with heat-conducting liquid metal, so that the rapid response and accurate measurement of the abnormal temperature rise in the joint are realized.

Description

Technical Field

[0001] This invention relates to the field of temperature measurement technology, and more specifically, to an online cable monitoring device based on a temperature sensor. Background Technology

[0002] Cable online monitoring devices are crucial equipment used to monitor the real-time operating status of power cables, ensuring the safe and stable operation of power systems. They primarily rely on temperature sensors to monitor temperature changes on the cable surface or at joints. If the temperature exceeds the normal range, it may indicate overload, partial discharge, or other potential faults in the cable. Temperature data is transmitted to a monitoring center via wired or wireless means for analysis and processing by technicians.

[0003] In existing technologies, temperature monitoring at cable joints typically involves wrapping a temperature sensor probe cord around the outer protective sheath of the cable. However, when an abnormal temperature rise occurs inside the cable joint, heat must be conducted through the insulation and protective layers to the external sensor. This process exhibits significant thermal lag, resulting in delayed temperature feedback. Because the monitoring system cannot detect internal fault temperature changes in a timely manner, it may miss the optimal early warning window, thereby increasing the risk of thermal failures at the joint or terminal equipment and affecting the safe operation and reliability of the system.

[0004] Based on this, the present invention discloses an online cable monitoring device based on a temperature sensor. Summary of the Invention

[0005] To address the problem in the prior art where the temperature sensor detection rope is wrapped around the outer protective sheath of the cable, resulting in heat conduction lag when abnormal temperature rise occurs inside the terminal, leading to delayed temperature feedback and difficulty in timely early warning, thus increasing the risk of thermal failure at the terminal or end, this invention provides a cable online monitoring device based on a temperature sensor. This device includes a connecting pipe and cable heads to be connected at both ends of the connecting pipe. The two ends of the connecting pipe are symmetrically and detachably equipped with fastening bolts, which are used to fix the cable core.

[0006] Traditionally, temperature measurements at cable joints are often taken by wrapping the probe cord of a temperature sensor around the outer protective sheath of the cable connection. However, due to the long heat conduction path, conduction lag occurs. This technical solution uses a ring-shaped heat conduction channel inside the wall of the connecting pipe, with a receiving part in the middle of the connecting pipe. The receiving part contains a storage component for the heat-conducting liquid metal that flows out through the cable head connection. The heat conduction ring and the receiving part together form a heat conduction channel.

[0007] Since the connection of cable core ends often relies on the tightening of bolts to achieve conductivity, and secondly, the compression of the receiving part and storage component is achieved through the connection of the cable core ends, which in turn causes the thermal conductive liquid metal to flow out. However, since there are often sharp parts near the cable core ends, it is easy to damage the receiving part and storage component. If the connection is moved later, it is easier to damage the thermal conductive liquid metal seal at the connection, which will cause the thermal conductive liquid metal to flow out and affect the temperature measurement at the joint later.

[0008] As a further improvement to this technical solution, the connecting pipe has connecting components symmetrically arranged at both ends. The connecting components include connecting covers that slide within the connecting pipe. The connecting pipe wall has two sliding grooves symmetrically arranged relative to its axial direction. A slider is actively arranged in the sliding groove, and a return spring is arranged in the sliding groove. The slider is slidably connected to the sliding groove through the return spring, and the slider is fixedly connected to the connecting cover. Furthermore, a groove for clamping the cable core end is provided on one side of the two connecting covers that are facing away from each other.

[0009] Based on this, since the thermally conductive liquid metal has high fluidity, in order to ensure the stability of the thermally conductive liquid metal in the storage component during installation, and at the same time to ensure that the thermally conductive liquid metal flows out through the storage component and enters the thermally conductive flow channel formed by the thermally conductive ring and the receiving part after installation, so as to conduct heat to the joint temperature change and facilitate subsequent temperature measurement.

[0010] As a further improvement to this technical solution, the receiving part includes deformable plates sealed on both sides of the center inside the connecting pipe, and the deformable plates are in contact with the corresponding connecting covers on the same side, forming a cylindrical storage cavity between the two deformable plates, and the storage cavity is connected to the heat-conducting ring channel; the deformable plates are made of deformable material, and in the initial state, the deformable plates have a convex structure relative to the center of the connecting pipe; the storage assembly includes deformable bladders on both sides that are in contact with the corresponding deformable plates and whose structures are adapted to each other, a protective film is provided between the two deformable bladders, and the two deformable bladders form a sealed structure through the protective film, and the deformable bladders and the protective film are filled with heat-conducting liquid metal.

[0011] In another scheme, a heat conduction channel is formed by the connecting pipe and the deformation plate. In order to transmit the temperature change of the heat conduction liquid metal in the heat conduction channel to the temperature sensor body to monitor the temperature change at the joint.

[0012] As a further improvement to this technical solution, the sensing end of the temperature sensor body is placed near the heat-conducting channel. Specifically, a mounting cover communicating with the heat-conducting loop is located at the center of the connecting pipe. The temperature sensor body is mounted on the mounting cover, and the sensing end of the temperature sensor body is elastically extended to connect with the heat-conducting loop and the receiving part. More specifically, a sealing cover is fixed to the top of the mounting cover outside the connecting pipe, and a measuring component is located at the top of the sealing cover. The temperature sensor body measures the temperature of the heat-conducting liquid metal in the heat-conducting channel through the measuring component. The measuring component includes a mounting tube, one end of which is detachably connected to the top of the sealing cover, and the other end of the sealing cover is connected to the temperature sensor body. A conductive wire is extended within the mounting tube, one end of which is electrically connected to the temperature sensor body, and the other end of the temperature sensor body extends into the heat-conducting loop. A sensing tube is fitted onto the end of the conductive wire inside the mounting cover. An opening is located at the center of the top of the mounting cover, and a deformable ball is placed inside the opening. The deformable ball is fitted onto the sensing tube, and the sensing tube forms a sealed structure with the opening through the deformable ball.

[0013] Based on this, if the sensing end of the temperature sensor body is always inside the thermally conductive liquid metal, it is easy to cause corrosion or damage to the sensing end over time, affecting the service life of the sensing end. Moreover, if the thermally conductive liquid metal is within the normal temperature range, it means that the connector is working normally, so there is no need for the temperature sensor body to work and perform temperature detection at the connector. Once the temperature changes, the thermally conductive liquid metal will expand rapidly to react, and then the sensing end of the temperature sensor body will be allowed to work. This saves energy, protects the service life of the temperature sensor body, and does not affect the temperature monitoring at the connector.

[0014] As a further improvement to this technical solution, a control component is provided inside the mounting cover to control the extension and retraction of the probe end by heating and expanding liquid gold.

[0015] Specifically, the control component includes a pressure plate located inside the mounting cover and arranged symmetrically to the probe tube. The pressure plate has an S-shaped seesaw structure. One end of the pressure plate is movably connected to the probe tube. A support rod is rotatably connected to the top bend of the pressure plate. The support rod is fixed inside the mounting cover.

[0016] The control component further includes a trigger component disposed at the bottom of the mounting cover. The trigger component includes a retractable deformation cover fixed to the bottom of the mounting cover, and the deformation cover is sealed and fitted to the inner wall of the mounting cover on all sides. A first buoyancy disk is fixed to the bottom of the deformation cover, and the bottom of the first buoyancy disk is located within the heat conduction ring channel. A second buoyancy disk is fixed to the bottom of the first buoyancy disk, and the second buoyancy disk is located above the connection between the heat conduction ring channel and the receiving part. The diameter of the second buoyancy disk is smaller than the diameter of the first buoyancy disk. A sliding cavity is formed at the center of the first and second buoyancy disks. The detection tube is slidably connected to the sliding cavity. A detection head is disposed at the bottom of the detection tube. The detection head is electrically connected to the end of the conductive line away from the temperature sensor body. The bottom bend of the pressure plate is fitted to the top of the first buoyancy disk. Both the deformation ring and the deformation ball are made of elastic material and are filled with temperature-sensitive gas.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0018] 1. In this online cable monitoring device based on a temperature sensor, an annular heat-conducting channel and a central receiving part are set inside the connecting pipe and filled with heat-conducting liquid metal. When a temperature rise occurs at the cable joint, the heat can be quickly absorbed and conducted by the heat-conducting liquid metal. This helps to shorten the heat conduction path of traditional external winding temperature sensors and avoid the temperature feedback delay caused by the obstruction of the outer protective sleeve, thereby achieving rapid response and accurate measurement of abnormal temperature rise inside the joint.

[0019] 2. In this temperature sensor-based online cable monitoring device, a storage component and a deformable receiving cavity structure are set up. During the cable core end docking process, the storage component is broken by mechanical extrusion, releasing the heat-conducting liquid metal into the heat-conducting channel. This helps to ensure that the heat-conducting liquid metal is automatically filled in place after installation without additional operation, improving installation efficiency, thereby realizing the self-starting and sealing guarantee of the heat conduction system and improving monitoring stability.

[0020] 3. In this temperature sensor-based online cable monitoring device, by setting up connecting components and their sliding structures, and using connecting covers to wrap and guide the cable core ends, the sharp ends are prevented from directly contacting the receiving part and storage components. This helps to protect the internal heat-conducting structure from damage, extend the service life of the device, thereby improving the overall structural safety and reliability and reducing the maintenance frequency.

[0021] 4. In this online cable monitoring device based on a temperature sensor, a control component with a linkage structure between a buoyancy plate and a pressure plate is incorporated. When the thermally conductive liquid metal expands due to temperature rise, it drives the buoyancy plate to rise and triggers the probe head to extend through the pressure plate. This allows the temperature sensor to actively intervene in detection only when there is an abnormal temperature rise, reducing ineffective working time, thereby extending the sensor's lifespan, saving energy, and ensuring timely acquisition of critical temperature information. Secondly, by setting up an elastically telescopic detection structure and a sealing cover system, the probe head can remain retracted under normal conditions, extending only when needed to contact the thermally conductive liquid metal. This helps prevent the probe end from being corroded or contaminated by long-term immersion in the thermally conductive liquid metal, thereby improving the stability and service life of the sensor and ensuring long-term reliable operation.

[0022] 5. In this online cable monitoring device based on a temperature sensor, a deformation ring and an elastic sealing structure are set up. When the temperature changes, the deformation ring expands, pushing the heat-conducting liquid metal to concentrate in the central area and contact the probe. This helps to enhance the flow guidance and thermal response sensitivity of the heat-conducting liquid metal, thereby further improving the accuracy and real-time performance of temperature monitoring. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 This is a cross-sectional view of the connecting pipe of the present invention;

[0025] Figure 3 for Figure 2 Enlarged view of the structure at point A in the middle;

[0026] Figure 4 This is a schematic diagram of the connecting cover of the present invention;

[0027] Figure 5 This is a schematic diagram of the structure of the storage component of the present invention;

[0028] Figure 6 This is a schematic diagram of the state of the deformable plate of the present invention;

[0029] Figure 7 for Figure 6 Enlarged view of the structure at point B.

[0030] The meanings of the labels in the diagram are as follows:

[0031] 1. Connecting pipe; 2. Fastening bolt; 3. Temperature sensor body; 4. Connecting assembly; 5. Receiving part; 6. Storage assembly; 7. Heat conduction loop; 8. Deformation ring; 9. Measuring assembly; 10. Mounting cover; 11. Sealing cover; 12. Pressure plate; 13. Support rod; 14. Trigger assembly;

[0032] 41. Slide rail; 42. Slider; 43. Connecting cover; 44. Return spring;

[0033] 51. Deformation plate; 52. Storage cavity;

[0034] 61. Deformation capsule; 62. Protective membrane;

[0035] 91. Mounting tube; 92. Conducting wire; 93. Detector tube; 94. Detector head; 95. Tension spring; 96. Deformation ball;

[0036] 141. Deformation cover; 142. First buoyancy disk; 143. Second buoyancy disk; 144. Sliding cavity. Detailed Implementation

[0037] 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 some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] The existing method of wrapping the temperature sensor detection rope around the outer protective sheath of the cable results in heat conduction lag when abnormal temperature rise occurs inside the terminal, leading to delayed temperature feedback, difficulty in timely warning, and increased risk of thermal failure at the terminal or end.

[0039] Therefore, this invention provides an online cable monitoring device based on a temperature sensor, see [link to relevant documentation]. Figures 1-2 As shown, it includes a connecting pipe 1 and cable heads to be connected at both ends of the connecting pipe 1. Fastening bolts 2 are symmetrically disassembled on both ends of the connecting pipe 1, and the fastening bolts 2 are used to fix the cable core.

[0040] For details, see Figures 2-3 As shown, traditional temperature measurement at cable joints is often achieved by wrapping the outer protective sleeve of the cable connection with the probe rope of the temperature sensor body 3. However, due to the long heat conduction path, conduction lag occurs. Therefore, this invention adopts a connecting pipe 1 with an annular heat conduction channel 7 inside the pipe wall, and a receiving part 5 in the middle of the connecting pipe 1. The receiving part 5 contains a storage component 6 for the heat conduction liquid metal that flows out through the cable head docking and squeezing. The heat conduction channel 7 and the receiving part 5 together form a heat conduction channel.

[0041] During work, through Figure 3As can be seen, by creating an annular heat-conducting channel 7 near the joint of the cable core ends, that is, near the central area of ​​the pipe wall of the connecting pipe 1, and then setting a sealed receiving part 5 in the central area of ​​the connecting pipe 1, a storage component 6 for storing liquid heat-conducting metal is placed in the receiving part 5. When the cable core ends at both ends of the connecting pipe 1 are joined, the liquid heat-conducting metal in the storage component 6 is squeezed out, causing it to fill the heat-conducting channel formed by the heat-conducting annular channel 7 and the receiving part 5. The central area of ​​this heat-conducting channel, that is, the area where the receiving part 5 is located, is directly... The heat-conducting liquid metal directly contacts and conducts heat to the cable core at the connection point. The heat-conducting ring channel 7, through its flow channel and annular structure, contacts and conducts heat to the vicinity of the joint of the cable core at both ends of the connecting pipe 1. When the cable core is connected and conducts electricity through the connecting pipe 1, failures are prone to occur at the joint. The heat-conducting liquid metal surrounds the cable core from the center to both sides near the joint, making the heat conduction more efficient and uniform. It can quickly respond to temperature changes near the joint and on the connecting pipe 1 through the properties of the heat-conducting liquid metal itself.

[0042] Furthermore, refer to Figure 3 and Figure 4 As shown, the cable core ends are often connected by fastening the bolts 2 to achieve conductivity. Secondly, the cable core ends are squeezed to compress the receiving part 5 and the storage component 6, which causes the thermal conductive liquid metal to flow out. However, since there are often sharp parts near the cable core ends, the receiving part 5 and the storage component 6 are easily damaged. If the connection is moved later, it is easier to damage the thermal conductive liquid metal seal at the connection, which will cause the thermal conductive liquid metal to flow out and affect the temperature measurement at the joint later. Therefore, the present invention adopts a connecting component 4 symmetrically arranged at both ends inside the connecting pipe 1. The connecting component 4 includes a connecting cover 43 that slides inside the connecting pipe 1. Two sliding grooves 41 are symmetrically opened in the wall of the connecting pipe 1 relative to its axial direction. A slider 42 is actively arranged in the sliding groove 41. A return spring 44 is arranged in the sliding groove 41. The slider 42 is slidably connected to the sliding groove 41 through the return spring 44. The slider 42 is fixedly connected to the connecting cover 43. In addition, a groove for clamping the cable core ends is opened on the opposite side of the two connecting covers 43.

[0043] During operation, the cable cores to be connected are inserted into the connecting tube 1 from both sides. The corresponding cable cores are then inserted into the grooves of the connecting cover 43. The corresponding cable cores are then pushed from both ends of the connecting tube 1, thereby causing the connecting cover 43 to slide within the groove 41. For the receiving part 5, the smooth and flat surface of the connecting cover 43 compresses the receiving part 5. For the cable cores, the connecting cover 43 and its grooves effectively wrap around them, protecting the sharp ends of the cable cores and preventing them from puncturing or damaging the receiving part 5 and the storage component 6. At the same time, the cooperation between the connecting cover 43 and the connecting tube 1 further increases the conductive path.

[0044] Furthermore, see Figure 3 and Figure 5 , Figure 7 As shown, due to the high fluidity of the thermally conductive liquid metal, in order to ensure the stability of the thermally conductive liquid metal in the storage component 6 during installation, and at the same time to ensure that the thermally conductive liquid metal flows out through the storage component 6 into the thermally conductive flow channel formed by the thermally conductive ring channel 7 and the receiving part 5 after installation, so as to conduct heat to the joint temperature change and facilitate subsequent temperature measurement, the present invention adopts the receiving part 5 including the deformation plate 51 sealed on both sides of the center inside the connecting pipe 1, and the deformation plate 51 is in contact with the corresponding connecting cover 43 on the same side. A cylindrical storage cavity 52 is formed between the two deformation plates 51, and the storage cavity 52 is connected to the thermally conductive ring channel 7.

[0045] It is worth mentioning that the deformation plate 51 is made of a deformable material, and in its initial state, the deformation plate 51 has a convex structure relative to the center of the connecting pipe 1.

[0046] During operation, when the cable core ends are connected and move towards each other through the connecting cover 43 to compress the deformation plate 51, the deformation plate 51 deforms from its original protruding structure towards the center of the connecting pipe 1. Therefore, the first receiving chamber, originally formed by the protruding structures of the two deformation plates 51, changes as follows: Figure 7 The second receiving chamber is shown, while the volume of the first receiving chamber is larger than that of the second receiving chamber. Therefore, it will squeeze the storage component 6, and the pressure inside the storage component 6 will increase until it ruptures. The heat-conducting liquid metal inside flows out, and at the same time, it changes the volume of the receiving chamber, so that the excess heat-conducting liquid metal in the storage component 6, which was originally adapted to the volume of the first receiving chamber, flows into the heat-conducting ring channel 7.

[0047] During this process, to ensure the airtightness of the receiving chamber, the deformable plate 51 is sealed to the connecting pipe 1 on all sides. Simultaneously, to allow the deformable plate 51 to undergo a squeezing action as the connecting cover 43 moves in opposite directions while maintaining a tight seal, the deformable plate 51 is made of a deformable material. Furthermore, since the temperature of the thermally conductive liquid metal is not high, even if a temperature change occurs at the joint due to a fault, the temperature will not exceed 80 degrees Celsius. Therefore, the material of the deformable plate 51 is easily achievable. Secondly, to ensure the thermally conductive liquid metal remains stably positioned within the receiving chamber during installation, it is crucial to prevent it from being easily broken during connection. (See [reference needed]). Figure 5 As shown, the storage component 6 includes deformation bladders 61 that are attached to and structurally compatible with the corresponding deformation plates 51 on both sides. A protective film 62 is provided between the two deformation bladders 61, and the two deformation bladders 61 form a sealed structure through the protective film 62. The deformation bladders 61 and the protective film 62 are filled with thermally conductive liquid metal.

[0048] When working in this way, the two deformation plates 51 move towards each other and deform, squeezing the deformation bladder 61 that is structurally compatible. The material of the protective film 62 is unstable and can remain sealed without external force. Once squeezed, it is easy to break. Therefore, the heat-conducting liquid metal eventually flows out through the protective film 62 and flows into the second receiving chamber and the heat-conducting ring channel 7, so that it circulates in the entire heat-conducting channel. In this way, it can react quickly when the temperature changes and transmit the temperature to the corresponding temperature sensor body 3 for temperature detection.

[0049] For details, see Figure 3 , Figure 6 and Figure 7 As shown, since a heat-conducting channel is formed by the heat-conducting ring channel 7 and the deformation plate 51, and in order to transmit the temperature change of the heat-conducting liquid metal in the heat-conducting channel to the temperature sensor body 3 to monitor the temperature change at the joint, the present invention places the detection end of the temperature sensor body 3 near the heat-conducting channel. That is, a mounting cover 10 communicating with the heat-conducting ring channel 7 is provided at the center of the connecting pipe 1, and the temperature sensor body 3 is provided on the mounting cover 10. The detection end of the temperature sensor body 3 is elastically extended and connected to the heat-conducting ring channel 7 and the receiving part 5 at the communication point.

[0050] Specifically, the mounting cover 10 is fixed with a sealing cover 11 at the top of the connecting pipe 1. A measuring component 9 is provided at the top of the sealing cover 11. The temperature sensor body 3 measures the temperature of the heat-conducting liquid metal in the heat-conducting channel through the measuring component 9.

[0051] The measuring component 9 includes a mounting tube 91, one end of which is detachably connected to the top of the sealing cover 11, and the other end of the sealing cover 11 is connected to the temperature sensor body 3. A conductive wire 92 is telescopically installed inside the mounting tube 91. One end of the conductive wire 92 is electrically connected to the temperature sensor body 3, and the other end of the temperature sensor body 3 extends into the heat conduction loop 7. A detection tube 93 is sleeved on the end of the conductive wire 92 located inside the mounting cover 10. An opening is provided at the center of the top of the mounting cover 10, and a deformable ball 96 is installed inside the opening. The deformable ball 96 is sleeved on the detection tube 93, and the detection tube 93 forms a sealing structure with the opening through the deformable ball 96.

[0052] In the initial state, one end of the probe tube 93 extends into the sealing cover 11, and a tension spring 95 is provided inside the sealing cover 11. The probe tube 93 is connected to the top of the sealing cover 11 through the tension spring 95.

[0053] During operation, the temperature sensor body 3 is fixedly connected to the sealing cover 11 via the mounting tube 91. The two ends of the conduction line 92 inside the mounting tube 91 are connected to the probe head 94 and the temperature sensor body 3, respectively. In this way, the temperature change detected by the probe head 94 is transmitted to the temperature sensor body 3 for monitoring and display via the conduction line 92. The length of the conduction line 92 inside the mounting tube 91 is variable, that is, the length of the conduction line 92 is long. Thus, the probe tube 93 drives the probe head 94 to elastically extend and retract at the top of the mounting cover 10, that is, inside the sealing cover 11, via the conduction line 92. When the probe head 94 is needed to detect the temperature of the heat-conducting liquid metal in the heat-conducting channel, the probe head 94 elastically extends and retracts inside the heat-conducting channel for detection. When the joint is working normally, the probe head 94 resets. During this process, the deformable ball 96 always maintains a sealed contact with the opening on the mounting cover 10, ensuring the stability of the seal between the mounting cover 10 and the sealing cover 11.

[0054] Further, see Figure 7 As shown, if the sensing end of the temperature sensor body 3 is always inside the thermally conductive liquid metal, it is prone to corrosion or damage over time, affecting the service life of the sensing end. Moreover, if the thermally conductive liquid metal is within the normal temperature range, it means that the joint is working normally, so there is no need for the temperature sensor body 3 to work and perform temperature detection at the joint. Once the temperature changes, the thermally conductive liquid metal will expand rapidly in response, and then the sensing end of the temperature sensor body 3 will be activated. This saves energy, protects the service life of the temperature sensor body 3, and does not affect the temperature monitoring at the joint. Therefore, the present invention uses a control component inside the mounting cover 10 to control the expansion and contraction of the sensing end by the expansion and contraction of the liquid metal.

[0055] Specifically, the control component includes a pressure plate 12 located inside the mounting cover 10 and arranged symmetrically with respect to the probe tube 93. The pressure plate 12 has an S-shaped seesaw structure. One end of the pressure plate 12 is movably connected to the probe tube 93. A support rod 13 is rotatably connected to the top bend of the pressure plate 12. The support rod 13 is fixed inside the mounting cover 10.

[0056] The control assembly also includes a trigger assembly 14 disposed at the bottom of the mounting cover 10. The trigger assembly 14 includes a retractable deformation cover 141, which is fixedly disposed at the bottom of the mounting cover 10 and is sealed to the inner wall of the mounting cover 10 on all sides. A first buoyancy disk 142 is fixedly disposed at the bottom of the deformation cover 141, and the bottom of the first buoyancy disk 142 is located within the heat conduction ring channel 7. A second buoyancy disk 143 is fixedly disposed at the bottom of the first buoyancy disk 142, and the second buoyancy disk 143 is located within the heat conduction ring channel 7. Above the connection between channel 7 and receiving part 5, the diameter of the second buoyancy disk 143 is smaller than the diameter of the first buoyancy disk 142. A sliding cavity 144 is formed at the center of the first buoyancy disk 142 and the second buoyancy disk 143. The probe tube 93 is slidably connected in the sliding cavity 144. A probe head 94 is provided at the bottom of the probe tube 93. The probe head 94 is electrically connected to the end of the conduction line 92 away from the temperature sensor body 3. The bottom bend of the pressure plate 12 is in contact with the top of the first buoyancy disk 142.

[0057] In the initial state, when the thermally conductive liquid metal is located in the thermally conductive channel, the probe 94 is located in the sliding cavity 144, and the thermally conductive liquid metal does not contact the probe 94;

[0058] When the cable core joint fails and heats up, the probe 94 is located outside the sliding cavity 144, and the heat-conducting liquid metal is in contact with the probe 94.

[0059] It is worth mentioning that both the deformation ring 8 and the deformation sphere 96 are made of elastic materials, such as silicone rubber-based composite materials, and are filled with temperature-sensitive gases, such as a mixture of n-alkanes.

[0060] During work, through Figure 7As can be seen, after installation, under normal conditions, the thermally conductive liquid metal is located at the bottom of the second buoyancy plate 143, while the probe 94 is located inside the sliding cavity 144. The probe 94 does not contact the thermally conductive liquid metal, and the thermally conductive liquid metal does not overflow the second buoyancy plate 143. When the temperature at the joint changes, i.e., rises, the thermally conductive liquid metal will quickly absorb the temperature near the joint and react and change, i.e., the thermally conductive liquid metal will expand. As the thermally conductive liquid metal expands, it will lift the entire second buoyancy plate 143 through the buoyancy of the second buoyancy plate 143 and the pressure in the heat conduction channel. The second buoyancy plate 143 is located in the central area of ​​the heat conduction channel. Since the temperature change is generally fastest in the central area of ​​the joint, this area will react quickly, causing the second buoyancy plate 143 to be lifted. Then, as the temperature is rapidly transferred, the thermally conductive liquid metal near the heat conduction ring 7 in the heat conduction channel also begins to expand due to heat, gradually lifting the first buoyancy plate 142. Thus, through the second buoyancy plate 143... The first buoyancy plate 142 and the second buoyancy plate 143 are lifted in sequence, causing the pressure plate 12 in contact with the top of the first buoyancy plate 142 to be lifted. Since the pressure plate 12 is an S-shaped seesaw structure, similar to the ignition structure of a lighter, the pressure plate 12 will rotate around the support rod 13, causing the end of the pressure plate 12 in contact with the probe tube 93 to press the probe tube 93 down from both sides, so that the probe tube 93 slides down in the sliding cavity 144, thereby causing the probe head 94 to quickly come into contact with the heat-conducting liquid metal, and the temperature in the heat-conducting liquid metal is transmitted to the temperature sensor body 3 through the conduction line 92 for processing and display, so that the staff can know the temperature change at the joint and take further corresponding measures. During this process, the first buoyancy plate 142 and the second buoyancy plate 143 are lifted, and the deformation cover 141 plays a sealing and protective role, preventing the heat-conducting liquid metal from flowing into the deformation cover 141. Moreover, the deformation cover 141 is telescopic and can also conform to the up and down movement of the first buoyancy plate 142 and the second buoyancy plate 143.

[0061] Secondly, in order to allow the heat-conducting liquid metal in the heat-conducting channel to quickly concentrate in the center and contact the probe head 94, deformation rings 8 are provided on the edges of the heat-conducting ring channels 7 on both sides of the central area of ​​the connecting pipe 1. The deformation rings 8 are filled with a gas such as n-alkanes, which causes the deformation rings 8 to expand rapidly when the temperature changes, quickly squeezing the heat-conducting liquid metal in the heat-conducting ring channels 7 from both sides into the central area of ​​the heat-conducting channel. As the temperature of the heat-conducting liquid metal continues to rise, there is a risk of vaporization and leakage. Therefore, the deformation ball 96 is constructed similarly to the deformation ring 8. As the probe tube 93 moves the deformation ball 96 downward, the deformation ball 96 begins to expand, ensuring that the deformation ball 96 is always in sealed contact with the opening of the mounting cover 10. As the temperature of the heat-conducting liquid metal rises further, the expansion of the deformation ball 96 will further increase. At the same time, with the tension of the spring 95 on the probe tube 93, the deformation ball 96 fits more tightly with the opening, making the seal more stable.

[0062] In summary, this invention achieves efficient and uniform heat conduction in the cable joint area by setting an annular heat-conducting channel 7 and a central receiving part 5 inside the cable joint connecting pipe 1, and configuring a storage assembly 6 composed of a deformation plate 51 and a deformation bladder 61. During the cable core end docking process, the heat-conducting liquid metal is automatically released and fills the entire heat-conducting channel. At the same time, the connecting assembly 4, composed of a connecting cover 43, a sliding groove 41, a slider 42, etc., prevents the sharp parts of the cable core end from damaging the internal heat conduction system and ensures sealing stability.

[0063] Furthermore, a control assembly consisting of a buoyancy plate, pressure plate 12, and support rod 13 is provided. This assembly can trigger the probe head 94 to extend and contact the thermally conductive liquid metal when the temperature rises abnormally. This allows the temperature sensor to intervene only when needed, extending its service life and saving energy. In addition, the design of the deformation ring 8 and the elastic sealing deformation ball 96 improves the flow concentration of the thermally conductive liquid metal and the system sealing performance, ensuring stable operation even at high temperatures. This effectively solves the problem that existing temperature sensor probe ropes wrapped around the outer protective sheath of cables cause thermal conduction lag when abnormal temperature rises occur inside the wiring terminal, resulting in delayed temperature feedback, difficulty in timely warning, and increased risk of thermal failure at the wiring terminal or terminal.

[0064] Working principle:

[0065] After the cable core ends are connected through the connecting cover 43, the connecting cover 43 moves towards each other and squeezes the deformation plate 51, causing the first receiving chamber between the deformation plates 51 to change into the second receiving chamber, thereby causing the protective film 62 to rupture. The heat-conducting liquid metal flows into the heat-conducting ring channel 7 and the storage chamber 52 to form a heat-conducting flow channel. When the temperature changes, the heat-conducting liquid metal in the heat-conducting flow channel expands, and the deformation ring 8 also expands, so that the temperature at the joint is transferred through the heat-conducting liquid metal. At the same time, the expansion of the deformation ring 8 squeezes the heat-conducting liquid metal to the center area of ​​the heat-conducting flow channel. Combined with the expansion of the heat-conducting liquid metal, the second buoyancy plate 143 and the first buoyancy plate 142 are gradually lifted up, thereby driving the pressure plate 12 to rotate around the trigger component 14, causing the probe tube 93 to begin to slide down in the sliding cavity 144, driving the probe head 94 to contact the heat-conducting liquid metal and measure the temperature change at the joint. During this process, the deformation ball 96 also gradually expands to ensure the sealing stability at the opening.

[0066] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0067] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A cable online monitoring device based on a temperature sensor, comprising a connecting pipe (1) and cable heads to be connected at both ends of the connecting pipe (1), characterized in that: The connecting pipe (1) has an annular heat-conducting channel (7) inside its wall. The connecting pipe (1) has a receiving part (5) in the middle. The receiving part (5) has a storage component (6) for the heat-conducting liquid metal to flow out through the cable head. The heat-conducting channel (7) and the receiving part (5) together form a heat-conducting flow channel. Among them, the center of the connecting pipe (1) is provided with a mounting cover (10) that communicates with the heat conduction ring channel (7). The mounting cover (10) is provided with a temperature sensor body (3). The detection end of the temperature sensor body (3) is connected to the heat conduction ring channel (7) and the receiving part (5) through elastic expansion and contraction. The mounting cover (10) is provided with a control component that controls the expansion and contraction of the detection end by the heating and expansion of liquid metal.

2. The online cable monitoring device based on a temperature sensor according to claim 1, characterized in that: The connecting pipe (1) has fastening bolts (2) symmetrically disassembled on both ends of the connection pipe (1), and the fastening bolts (2) are used to fix the cable core.

3. The online cable monitoring device based on a temperature sensor according to claim 1, characterized in that: The connecting pipe (1) has connecting components (4) symmetrically arranged at both ends. The connecting components (4) include a connecting cover (43) that slides inside the connecting pipe (1). The connecting pipe (1) has two sliding grooves (41) symmetrically arranged in the pipe wall relative to its axial direction. A slider (42) is actively arranged in the sliding groove (41). A return spring (44) is arranged in the sliding groove (41). The slider (42) is slidably connected to the sliding groove (41) through the return spring (44). The slider (42) is fixedly connected to the connecting cover (43).

4. The online cable monitoring device based on a temperature sensor according to claim 3, characterized in that: The two connecting covers (43) have grooves on opposite sides for securing the cable core.

5. The online cable monitoring device based on a temperature sensor according to claim 4, characterized in that: The receiving part (5) includes a deformation plate (51) sealed on both sides of the center inside the connecting pipe (1), and the deformation plate (51) is in contact with the corresponding connecting cover (43) on the same side. A cylindrical storage cavity (52) is formed between the two deformation plates (51), and the storage cavity (52) is connected to the heat conduction ring channel (7).

6. The online cable monitoring device based on a temperature sensor according to claim 5, characterized in that: The deformable plate (51) is made of a deformable material. In its initial state, the deformable plate (51) has a convex structure relative to the center of the connecting pipe (1).

7. The online cable monitoring device based on a temperature sensor according to claim 6, characterized in that: The storage component (6) includes a deformation bladder (61) that is attached to and structurally compatible with the corresponding deformation plate (51) on both sides. A protective film (62) is provided between the two deformation bladders (61). The two deformation bladders (61) form a sealed structure through the protective film (62). The deformation bladders (61) and the protective film (62) are filled with thermally conductive liquid gold.

8. The online cable monitoring device based on a temperature sensor according to claim 1, characterized in that: The mounting cover (10) is fixed with a sealing cover (11) at the top of the outside of the connecting pipe (1). A measuring component (9) is provided at the top of the sealing cover (11). The temperature sensor body (3) measures the temperature of the heat-conducting liquid metal in the heat-conducting channel through the measuring component (9). The measuring component (9) includes a mounting tube (91), one end of which is detachably connected to the top of the sealing cover (11), and the other end of the sealing cover (11) is connected to the temperature sensor body (3). A conductive wire (92) is telescopically arranged inside the mounting tube (91), one end of which is electrically connected to the temperature sensor body (3), and the other end of which extends into the heat conduction loop (7). A detection tube (93) is sleeved on one end of the conductive wire (92) inside the mounting cover (10). The mounting cover (10) has an opening at the center of its top, and a deformable ball (96) is provided inside the opening. The deformable ball (96) is sleeved on the probe tube (93), and the probe tube (93) forms a sealed structure with the opening through the deformable ball (96). In the initial state, one end of the probe tube (93) extends into the sealing cover (11), and a tension spring (95) is provided inside the sealing cover (11). The probe tube (93) is connected to the top of the sealing cover (11) through the tension spring (95).

9. The online cable monitoring device based on a temperature sensor according to claim 8, characterized in that: The control component includes a pressure plate (12) located inside the mounting cover (10) and arranged symmetrically with respect to the probe tube (93). The pressure plate (12) has an S-shaped seesaw structure. One end of the pressure plate (12) is movably connected to the probe tube (93). A support rod (13) is rotatably connected to the top bend of the pressure plate (12). The support rod (13) is fixed inside the mounting cover (10). The control component also includes a trigger component (14) disposed at the bottom of the mounting cover (10). The trigger component (14) includes a retractable deformation cover (141), which is fixedly disposed at the bottom of the mounting cover (10) and the deformation cover (141) is sealed and fitted to the inner wall of the mounting cover (10) around its perimeter. A first buoyancy disk (142) is fixedly disposed at the bottom of the deformation cover (141), and the bottom of the first buoyancy disk (142) is located within the heat conduction ring channel (7). A second buoyancy disk (143) is fixedly disposed at the bottom of the first buoyancy disk (142). The second buoyancy disk (143) is located above the connection between the heat conduction ring (7) and the receiving part (5). The diameter of the second buoyancy disk (143) is smaller than the diameter of the first buoyancy disk (142). A sliding cavity (144) is provided at the center of the first buoyancy disk (142) and the second buoyancy disk (143). The probe tube (93) is slidably connected in the sliding cavity (144). A probe head (94) is provided at the bottom of the probe tube (93). The probe head (94) is electrically connected to the end of the conduction line (92) away from the temperature sensor body (3). The bottom bend of the pressure plate (12) is in contact with the top of the first buoyancy plate (142); In the initial state, when the thermally conductive liquid metal is located in the thermally conductive channel, the probe (94) is located in the sliding cavity (144), and the thermally conductive liquid metal does not contact the probe (94); When the cable core joint fails and heats up, the probe (94) is located outside the sliding cavity (144), and the heat-conducting liquid metal is in contact with the probe (94).

10. The online cable monitoring device based on a temperature sensor according to claim 9, characterized in that: Deformation rings (8) are provided at both ends of the heat conduction ring channel (7). Both the deformation rings (8) and the deformation spheres (96) are made of elastic materials and are filled with temperature-sensitive gas.

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