A cable temperature monitoring device

Abstract

The utility model belongs to detection equipment technical field, concretely relates to a cable temperature monitoring devices, including cable and the line pipe of setting on cable, still be provided with detection device between line pipe and cable, including a group of cavity and the telescopic component of connecting cavity, the cavity is arc structure, is composed by cover and chamber, still has a group of through -hole which is perpendicular to the circle center on the inner arc surface of chamber, the telescopic component includes first connecting head, second connecting head and rotary joint piece, still be provided with circuit board, baffle, support column and temperature sensor in the chamber, circuit board sets up at the bottom of chamber, baffle sets up at the middle part of cavity, support column is fixed between the baffle of chamber bottom, temperature sensor sets up on the inner arc surface of chamber, with the cable temperature for detecting outside with the hole department. The utility model, use annular detection device to detect cable, do not influence the replacement use of cable, simple structure convenient to use.

Description

Technical Field

[0001] This utility model belongs to the field of testing equipment technology, and specifically relates to a cable temperature monitoring device. Background Technology

[0002] Cables inevitably generate heat when transmitting load current. As the load current increases, the surface temperature of the wire also rises. If the temperature becomes too high, it can lead to insulation damage, short circuits, or fires. The root cause is that current flowing through the wire generates resistance losses, which are converted into heat, causing the wire temperature to rise. This is especially true when cables pass through complex environments, where conduits are used for protection. Because air circulation is poor inside the conduit, the cable's heat dissipation is inefficient. Over time, heat accumulates inside the conduit, not only causing the cable to overheat and affect its current carrying capacity, but also potentially damaging the insulation and causing short circuits. Therefore, it is necessary to monitor cables in conduits to prevent serious losses.

[0003] Patent CN214379923U discloses a temperature-controlled cable mounting plate, including a cable fixing structure and a temperature alarm system. The cable fixing structure includes a fixing plate and a fixing cover, and the temperature alarm system includes a temperature detection device and an alarm, which are connected via a sensor circuit. This invention uses a cable fixing structure to secure the cable and a temperature alarm system to monitor the cable temperature in real time. After the cable is placed in the cable fixing structure, a pressure plate applies spring force to the cable, ensuring the cable is close to the temperature detection device at the bottom of the groove. The temperature detection device can promptly alert personnel to take action when the line is overloaded or the cable temperature is too high. The cable installation is simple and convenient, and the cable is securely fixed, allowing for long-term cable fixation and real-time monitoring, reducing the occurrence of accidents. However, in this patent, the cable is pressed tightly against the temperature detection device by the pressure plate to ensure accurate detection. Prolonged pressure on the cable can deform the insulation layer, leading to poor contact between the cable and the temperature detection device, inaccurate detection data, or even damage to the insulation layer. Utility Model Content

[0004] The purpose of this invention is to solve the problems existing in the background technology mentioned above, and to provide a cable temperature monitoring device that uses a ring detection device to detect the cable without affecting the replacement and use of the cable. The device has a simple structure and is easy to use.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a cable temperature monitoring device, comprising a cable and a conduit sleeved on the cable, wherein a detection device is further provided between the conduit and the cable, comprising a set of cavities and a telescopic assembly connecting the cavities, wherein the cavity is an arc-shaped structure, consisting of a cover plate and a chamber, and a set of through holes perpendicular to the center of the circle are also opened on the inner arc surface of the chamber, the telescopic assembly comprising a first connector, a second connector and a rotating connector, wherein the first connector is located in the middle left side of the chamber, the second connector is located in the middle right side of the chamber, and the multiple cavities rotate. When the components are connected in a distributed manner, the first connector is aligned with the second connector of the adjacent cavity. One end of the rotating connector is spirally connected to the first connector, and the other end is spirally connected to the second connector. When the rotating connector rotates, the first and second connectors connected at both ends retract or extend simultaneously. The cavity is also equipped with a circuit board, a partition, a support column, and a temperature sensor. The circuit board is located at the bottom of the cavity, the partition is located in the middle of the cavity, the support column is fixed between the bottom of the cavity and the partition, and the temperature sensor is located on the inner arc surface of the cavity and is used to detect the temperature of the external cable at the through hole.

[0006] Furthermore, a distance sensor and a mounting base are also provided on the inner arc surface of the cavity. The mounting base fixes the distance sensor and the temperature sensor on the inner arc surface of the cavity. The temperature sensor is located at both ends of the inner arc surface of the cavity, and the distance sensor is located in the middle of the inner arc surface of the cavity. The distance sensor and the temperature sensor are electrically connected to the circuit board.

[0007] Furthermore, both the first connector and the rotary connector have external threads on their left outer contours, and both the second connector and the rotary connector have internal threads on their right inner contours, so that the right end of the second connector covers the rotary connector, the right end of the rotary connector covers the first connector, and when the rotary connector rotates, it simultaneously drives the first connector and the second connector to move closer or further apart.

[0008] Furthermore, the first connector and the second connector are respectively provided with a threaded male head and a threaded female head that can be spirally connected at their two ends, and the two ends of the rotating connector are also respectively provided with a threaded male head and a threaded female head.

[0009] Furthermore, the centers of the cavity and the telescopic assembly are concentric, and the length of the rotating connector is twice that of the first connector and the second connector.

[0010] The beneficial effects of this utility model are: 1) This utility model sets the detection device to be snapped onto the inner wall of the conduit. Through the cooperation of the cavity and the telescopic component, the outer ring size of the detection device can be adjusted so that it can fit tightly inside the conduit. The hollow position is used for cable threading. Through the cooperation of the temperature sensor and distance sensor installed in the cavity, the temperature change of the internal cable can be detected. This not only enables non-contact temperature monitoring of the cable inside the conduit, but also facilitates the replacement of the cable and the detection device later, making it convenient to use. Attached Figure Description

[0011] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0012] Figure 2 This is the left view of the present invention.

[0013] Figure 3 for Figure 2 Sectional view along direction A.

[0014] Figure 4 This is a schematic diagram of the detection device.

[0015] Figure 5 This is a schematic diagram showing the connection between the cavity and the telescopic assembly.

[0016] Figure 6 for Figure 5 The exploded diagram.

[0017] Figure 7 This is a schematic diagram of the sensor connections within the chamber.

[0018] Figure 8 This is a schematic diagram of the connection of the telescopic component.

[0019] In the diagram: 1. Cable; 2. Conduit; 3. Detection device; 4. Cavity; 5. Telescopic assembly; 6. Cover plate; 7. Chamber; 8. Through hole; 9. First connector; 10. Second connector; 11. Rotary connector; 12. Circuit board; 13. Partition; 14. Support column; 15. Temperature sensor; 16. Distance sensor; 17. Mounting base. Detailed Implementation

[0020] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments.

[0021] Example: As shown in the figure, the cable temperature monitoring device of this utility model includes a cable 1 and a conduit 2 sleeved on the cable 1. A detection device 3 is also provided between the conduit 2 and the cable 1. The device includes a set of cavities 4 and a telescopic assembly 5 connecting the cavities 4. The cavity 4 has an arc-shaped structure, consisting of a cover plate 6 and a chamber 7. A set of through holes 8 perpendicular to the center of the circle are also opened on the inner arc surface of the chamber 7. The telescopic assembly 5 includes a first connector 9, a second connector 10, and a rotating connector 11. The first connector 9 is located in the middle left side of the chamber 7, and the second connector 10 is located in the middle right side of the chamber 7. When multiple cavities 4 are rotated and connected, the first connector 9... The connector 9 is aligned with the second connector 10 of the adjacent cavity 4. One end of the rotating connector 11 is spirally connected to the first connector 9, and the other end is spirally connected to the second connector 10. When the rotating connector 11 rotates, the first connector 9 and the second connector 10 connected at both ends retract or extend simultaneously. The cavity 7 is also provided with a circuit board 12, a partition 13, a support column 14, and a temperature sensor 15. The circuit board 12 is located at the bottom of the cavity 7, the partition 13 is located in the middle of the cavity 4, the support column 14 is fixed between the bottom of the cavity 7 and the partition 13, and the temperature sensor 15 is located on the inner arc surface of the cavity 7 and is used to detect the temperature of the external cable 1 at the through hole 8.

[0022] refer to Figure 1-6 In this embodiment, three cavities 4 and three telescopic components 5 are used to adjustably connect the cavities 4 to the inner wall of the conduit 2. Each cavity 4 is equipped with two temperature sensors 15, which monitor the cable 1 in real time through the through hole 8. A circuit board 12 is installed at the lower end of the partition 13 and connected to the temperature sensors 15 for power supply and data transmission. An external power supply and wireless transmission module are installed at the upper end. During detection, the temperature sensors 15 detect the external cable 1 through the through hole 8. At this time, the detection device 3 is fixed on the inner wall of the conduit 2 at a certain distance from the cable 1. The value detected by the temperature sensors 15 is attenuated from the actual temperature. Therefore, it is necessary to determine the true temperature change based on the rate of change of the values ​​of the six temperature sensors 15. If the temperature curvature is too large, it can be regarded as overheating due to a large load. If the curvature is too small and the detected value gradually decreases, the cable 1 may be disconnected.

[0023] A distance sensor 16 and a mounting base 17 are also provided on the inner arc surface of the chamber 7. The mounting base 17 fixes the distance sensor 16 and the temperature sensor 15 on the inner arc surface of the chamber 7. The temperature sensor 15 is located at both ends of the inner arc surface of the chamber 7, and the distance sensor 16 is located in the middle of the inner arc surface of the chamber 7. The distance sensor 16 and the temperature sensor 15 are electrically connected to the circuit board 12.

[0024] refer to Figure 7In this embodiment, the mounting base 17 has internal holes for mounting and fixing the distance sensor 16 and the temperature sensor 15. The temperature sensor 15 is a silicon-based infrared sensor. Its principle is that a large number of thermocouples are stacked on the bottom silicon substrate. The high-temperature and low-temperature contacts on the bottom substrate are isolated from each other by an extremely thin film. The black absorption layer above the high-temperature contacts converts the incident radiation into heat energy. As can be seen from the thermoelectric effect, the output voltage is proportional to the radiation. Typically, Bi-Sb and Ni-Cr thermocouples are used in the thermopile. Because infrared radiation characteristics are temperature-dependent, different filters can be used to measure different temperature ranges. During detection, the through-hole 8 serves as a heat detection hole, detecting changes in infrared radiation energy and comparing it with preset standard values ​​on the circuit board 12. Excessively high or low temperatures trigger the alarm program set on the circuit board 12, sending the alarm signal to a remote location via a wire or wireless transmission module, achieving real-time monitoring and warning.

[0025] Meanwhile, to improve the accuracy of the temperature sensor 15, a distance sensor 16 is added between the two temperature sensors 15. The infrared distance sensor 16 emits infrared light to the surface of the cable 1, and receives the reflected infrared light for distance measurement. A total of six temperature sensors 15 and three distance sensors 16 are installed on the three cavities 4 to detect the cable 1 at its concentric position. When the three distance measurements at the cable 1 are the same, the overall data fluctuation range of the six temperature sensors 15 is considered small and thus a valid value; a single high value is considered a hot spot and triggers an alarm. Similarly, when the cable 1 is not in a concentric position, i.e., when the three distance sensors... When the distances of the six temperature sensors 15 are different, the detection values ​​of the six temperature sensors 15 should conform to the curve change law in pairs, that is, the three sets of data are changing values, and the difference between each set is not large, which are considered as valid values. The values ​​should be corrected according to the distance during measurement. For example, the temperature value at the farthest end needs to be evaluated by adding value because the thermal radiation attenuation is the most severe. The magnitude of the addition value is calculated by combining the distance with the attenuation formula. The temperature value at the closest end has the slightest attenuation and can be regarded as the true temperature value without assignment. Similarly, the temperature at the middle end is appropriately corrected by adding value. The final data obtained is the true temperature of cable 1.

[0026] To improve the accuracy of the detection values, detection devices 3 can be attached to both ends of the conduit 2 to monitor the temperature changes of the internal cable 1 in real time. Similarly, since the values ​​at both ends are close or the same, the two sets of values ​​can be used as a reference for comparison. Under normal circumstances, the temperature change rate at both ends is consistent. If an abnormality occurs at one end, it can be regarded as the cable 1 being overloaded and overheated, and an alarm can be triggered for timely inspection and handling.

[0027] Both the first connector 9 and the rotary connector 11 have external threads on their left outer contours, and both the second connector 10 and the rotary connector 11 have internal threads on their right inner contours, so that the right end of the second connector 10 covers the rotary connector 11, and the right end of the rotary connector 11 covers the first connector. When the rotary connector 11 rotates, it simultaneously drives the first connector 9 and the second connector 10 to move closer or further away.

[0028] The first connector 9 and the second connector 10 are respectively provided with a threaded male head and a threaded female head that can be spirally connected at their two ends, and the two ends of the rotating connector 11 are also respectively provided with a threaded male head and a threaded female head.

[0029] The centers of cavity 4 and telescopic assembly 5 are concentric, and the length of rotating connector 11 is twice that of first connector 9 and second connector 10.

[0030] refer to Figure 8 In this embodiment, the first connector 9, the second connector 10, and the rotating connector 11 are connected by a spiral connection, with a male end and a female end, to securely connect the three parts. In actual use, both ends of the first connector 9 and the second connector 10 can be set as male ends, and both ends of the rotating connector 11 can be female ends. The external threads of the first connector 9 and the second connector 10 are opposite, which can ensure that the rotating connector 11 can move relative to or in opposite directions with the first connector 9 and the second connector 10 when the connection is rotated. That is, the three cavities 4 can be enlarged or reduced by the three telescopic components 5 so that they can be adapted to the installation of conduits 2 of different thicknesses.

[0031] The structure shown in the figure is that the right side of the second connector 10 is a female head with an internal thread, which is screwed onto the male head at the left end of the rotating connector 11. Similarly, the rotating connector 11 rotates with the first connector 9, and the structure is the same. Since the telescopic component 5 and the cavity 4 are concentric, when the telescopic component 5 moves the cavity 4, it can control the overall size of the outer contour of the detection device 3. The size of the inner hole depends on the size of the concentric circles of the inner arc surface of the cavity 4. The three cavities 4 are supported by each other through the telescopic component 5 and finally fixed inside the inner wall of the conduit 2. When the cable 1 moves or is dragged, it will not interfere with the monitoring of the detection device 3, and it can also prevent the cable 1 from being scratched or crushed by the detection device 3, thus improving its service life.

[0032] This utility model features a detection device that snaps onto the inner wall of a conduit. By cooperating with a cavity and a telescopic component, the outer contour of the detection device can be adjusted to ensure a tight fit within the conduit. The hollow section is used for cable insertion. Temperature and distance sensors installed within the cavity work together to detect temperature changes in the internal cable. This not only enables non-contact temperature monitoring of the cable within the conduit but also facilitates future cable and detection device replacement, making it convenient to use.

[0033] The above description is only used to illustrate the technical solution of this utility model and is not intended to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model, as long as they do not depart from the spirit and scope of the technical solution of this utility model, should be covered within the scope of the claims of this utility model.

Claims

1. A cable temperature monitoring device, characterized in that: The device includes a cable and a conduit fitted over the cable. A detection device is also provided between the conduit and the cable. The device includes a set of cavities and a telescopic assembly connecting the cavities. The cavity is an arc-shaped structure consisting of a cover plate and a chamber. A set of through holes perpendicular to the center of the circle are also opened on the inner arc surface of the chamber. The telescopic assembly includes a first connector, a second connector, and a rotating connector. The first connector is located in the middle left side of the chamber, and the second connector is located in the middle right side of the chamber. When multiple cavities are rotated and connected, the first connector is aligned with the second connector of the adjacent cavity. One end of the rotating connector is spirally connected to the first connector, and the other end is spirally connected to the second connector. When the rotating connector rotates, the first and second connectors connected at both ends retract or extend simultaneously. The chamber also contains a circuit board, a partition, a support column, and a temperature sensor. The circuit board is located at the bottom of the chamber, the partition is located in the middle of the cavity, the support column is fixed between the bottom of the chamber and the partition, and the temperature sensor is located on the inner arc surface of the chamber, opposite to the through holes, for detecting the temperature of the external cable.

2. The cable temperature monitoring device according to claim 1, characterized in that: A distance sensor and a mounting base are also provided on the inner arc surface of the cavity. The mounting base fixes the distance sensor and temperature sensor on the inner arc surface of the cavity. The temperature sensor is located at both ends of the inner arc surface of the cavity, and the distance sensor is located in the middle of the inner arc surface of the cavity. The distance sensor and the temperature sensor are electrically connected to the circuit board.

3. The cable temperature monitoring device according to claim 1, characterized in that: Both the first connector and the rotary connector have external threads on their left outer contours, and both the second connector and the rotary connector have internal threads on their right inner contours, so that the right end of the second connector covers the rotary connector, and the right end of the rotary connector covers the first connector. When the rotary connector rotates, it simultaneously drives the first connector and the second connector to move closer or further apart.

4. The cable temperature monitoring device according to claim 1, characterized in that: The first connector and the second connector are respectively provided with a threaded male head and a threaded female head that can be spirally connected at their two ends, and the two ends of the rotating connector are also respectively provided with a threaded male head and a threaded female head.

5. The cable temperature monitoring device according to claim 1, characterized in that: The cavity and the telescopic assembly are concentric, and the length of the rotating connector is twice that of the first connector and the second connector.

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