Low-power-consumption weather-proof cable insulation sheath temperature monitoring color changing device

Abstract

The invention discloses a low-power-consumption weather-proof cable insulation sheath temperature monitoring color changing device, and relates to the technical field of cable state monitoring, the low-power-consumption weather-proof cable insulation sheath temperature monitoring color changing device comprises an external buckle type carrier, a dual-circuit intelligent control system and a full-dimension weather-proof assembly, the external buckle type carrier is used for being detachably fixed outside a cable; the double-circuit intelligent control system is arranged in the external buckle type carrier and is used for monitoring the temperature of the cable and executing early warning; the full-dimensional weather-proof assembly is used for protecting the device to stably operate for a long time in an outdoor severe environment; the external buckle type carrier comprises a semi-arc buckle body capable of being opened and closed, and a flexible heat conduction pad is arranged on the inner side of the buckle body and used for being tightly attached to a cable insulation sheath. The double-circuit intelligent control system comprises a standby circuit and a working circuit, the standby circuit is in a low-power-consumption dormant state when monitoring that the temperature is lower than a preset threshold value and awakens the working circuit when the temperature reaches or exceeds the preset threshold value, and the working circuit is configured to execute local color-changing warning and remote wireless alarming.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cable state monitoring, in particular to a low-power weather-resistant cable insulation sheath temperature monitoring color-changing device. BACKGROUND

[0002] As a key carrier for power transmission and distribution, the operation state of the cable is directly related to the safety and reliability of the power grid. During long-term operation, the cable is prone to local overheating due to load changes, joint aging, insulation deterioration, etc. In severe cases, it may cause insulation breakdown, short circuit, and even fire accidents. Therefore, real-time monitoring of the cable insulation sheath temperature, timely detection of abnormal temperature rise and early warning are of great significance to ensure the stable operation of the power system.

[0003] Currently, cable temperature monitoring technologies mainly include infrared temperature measurement, optical fiber sensing, and built-in temperature sensors. However, these methods have certain limitations: infrared temperature measurement is greatly affected by the environment and cannot achieve continuous monitoring; optical fiber sensing systems are complex and costly, making it difficult to deploy on a large scale; built-in sensors need to be pre-embedded during cable manufacturing, which is not suitable for retrofitting of already laid cables. In addition, existing external monitoring devices generally have high power consumption, short battery life, poor weather resistance, and inconvenient installation, making it difficult to work stably in outdoor harsh environments for a long time.

[0004] To address the above problems, there is an urgent need to develop an external cable temperature monitoring device that is easy to install, low-power, weather-resistant, and has local and remote dual early warning functions to meet the real-time and reliable monitoring needs of key parts of already laid and newly built cables. SUMMARY

[0005] The present application aims to overcome the shortcomings of the prior art and provide an external low-power weather-resistant cable insulation sheath temperature monitoring color-changing device to realize temperature monitoring of easily heated parts of already laid or newly built cables, with the advantages of easy installation, low power consumption, long battery life, local and remote dual early warning, and excellent weather resistance.

[0006] The present application achieves the above-mentioned purposes through the following technical solutions:

[0007] The application discloses a low-power-consumption weather-resistant cable insulation sheath temperature monitoring color-changing device, which comprises an external buckle carrier, a double-circuit intelligent control system and a full-dimension weather-resistant component, the external buckle carrier is used for being detachably fixed to the outside of a cable, the double-circuit intelligent control system is arranged in the external buckle carrier and is used for monitoring the temperature of the cable and performing early warning, and the full-dimension weather-resistant component is used for protecting the device to stably operate in an outdoor harsh environment for a long time; the external buckle carrier comprises a semi-arc-shaped buckle main body which is openable and closable, a flexible heat-conducting pad is arranged on the inner side of the buckle main body and is used for being closely combined with the cable insulation sheath; the double-circuit intelligent control system comprises a standby circuit and a working circuit, the standby circuit is in a low-power-consumption sleep state when the temperature is monitored to be lower than a preset threshold value, and the working circuit is woken up when the temperature reaches or exceeds the preset threshold value, and the working circuit is configured to perform local color-changing warning and remote wireless alarm.

[0008] Preferably, the buckle main body is made of glass fiber reinforced polyamide 66 material; and the buckle main body is locked and fixed through a connecting component.

[0009] Preferably, the buckle main body comprises a main buckle and an auxiliary buckle, threaded rods are arranged at four corners of the auxiliary buckle respectively, rotating fixing heads are fixedly arranged at the upper ends of the threaded rods, nuts are arranged on the threaded rods in a sleeved mode through threaded connection, a long-circular notch is formed in the main buckle at a position corresponding to the rotating fixing heads, a rotating groove is formed in the main buckle and extends to the long-circular notch, and the rotating fixing heads are clamped in the rotating groove after being rotated by 90 degrees through the long-circular notch.

[0010] Preferably, the standby circuit comprises a negative temperature coefficient thermistor and an ultra-low-power-consumption microcontroller, and the negative temperature coefficient thermistor is arranged in the flexible heat-conducting pad; and the working circuit comprises an RGB-LED lamp bead and a LoRa wireless communication module.

[0011] Preferably, the local color-changing warning is that the RGB-LED lamp bead emits yellow light when the temperature is in a first threshold range, and the RGB-LED lamp bead emits red light when the temperature reaches or exceeds a second threshold value; and a frosted light-transmitting window is arranged on the buckle main body at a position corresponding to the RGB-LED lamp bead.

[0012] Preferably, the full-dimension weather-resistant component comprises a fluorocarbon coating sprayed on the outer surface of the buckle main body, an acrylic three-protection paint coated on the surface of an internal printed circuit board, interface elements connected in an IP67 level waterproof mode, and a lithium sulfonyl chloride battery used for supplying power to the whole device, and a battery cabin of the battery is provided with a polytetrafluoroethylene air-permeable film.

[0013] Preferably, the fluorocarbon coating contains nano-silicon dioxide anti-scratching agents.

[0014] Preferably, one end of the buckle body is locked and fixed through a connecting assembly, and the other end is rotationally connected through a rotating assembly.

[0015] A cable temperature monitoring method applied to the above-mentioned external low-power weather-resistant cable insulation sheath temperature monitoring color-changing device, the method comprising:

[0016] Periodically collecting cable temperature through standby circuit at a first frequency;

[0017] When the collected temperature is lower than a preset threshold, maintaining a low-power sleep state;

[0018] When the collected temperature reaches or exceeds the preset threshold, waking up the working circuit;

[0019] Starting local color-changing warning and remote wireless alarm through the working circuit;

[0020] When the temperature falls below the preset threshold, turning off the working circuit and returning to the low-power sleep state.

[0021] Preferably, the remote wireless alarm includes packaging device identification information, temperature value and warning level, and periodically sending through a LoRa wireless communication module at a second frequency until the temperature falls below the preset threshold.

[0022] Compared with the prior art, the present application has the following advantages:

[0023] 1. Through the semi-arc openable and closable design of the external buckle carrier and the unique rotating locking structure, the device is quickly installed and removed on the cable, without any modification to the existing cable, especially suitable for monitoring point modification of the laid cable;

[0024] 2. Through the double-circuit intelligent control system composed of standby circuit and working circuit, the intelligent power consumption management of "monitoring-sleep-wakeup-alarm" is realized, so that the device is in a super-low-power sleep state for most of the time, significantly prolonging the battery life;

[0025] 3. Through the local color-changing warning of integrated RGB-LED lamp beads and the remote alarm of LoRa wireless communication, the dual protection of on-site visual warning and remote monitoring center alarm is realized, ensuring that abnormal temperature can be discovered in time and reliably;

[0026] 4. Through the all-dimensional weather-resistant assembly composed of fluorocarbon coating, three-proof paint, IP67 waterproof interface and battery compartment with breathable film, long-term stable operation and high reliability of the device in outdoor harsh environments (such as sun exposure, rain, salt spray and condensation) are realized;

[0027] 5. By arranging a flexible heat-conducting pad inside the main buckle and integrating a negative temperature coefficient thermistor therein, close fitting and efficient heat conduction with the cable insulation sheath are achieved, ensuring the accuracy and response speed of temperature monitoring;

[0028] 6. By using glass fiber reinforced polyamide 66 material and adding nano-silicon dioxide anti-scratch agent in the fluorocarbon coating, high strength, high toughness and excellent aging resistance and scratch resistance of the overall structure of the device are achieved;

[0029] 7. By using lithium sulfonyl chloride batteries and combining with low-power circuit design, the device can be maintained for several years, greatly reducing the later operation and maintenance cost. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0031] Figure 1 is a perspective structural schematic diagram of embodiment 1 of the low-power weather-resistant cable insulation sheath temperature monitoring color-changing device described in the present application.

[0032] Figure 2 is a front view structural schematic diagram of embodiment 2 of the low-power weather-resistant cable insulation sheath temperature monitoring color-changing device described in the present application.

[0033] Figure 3 is a A-A sectional view of embodiment 2 of the low-power weather-resistant cable insulation sheath temperature monitoring color-changing device described in the present application.

[0034] Figure 4 is an enlarged view of B of embodiment 2 of the low-power weather-resistant cable insulation sheath temperature monitoring color-changing device described in the present application.

[0035] Figure 5 is a perspective structural schematic diagram of the main buckle of embodiment 2 of the low-power weather-resistant cable insulation sheath temperature monitoring color-changing device described in the present application.

[0036] Figure 6 is an enlarged view of C of embodiment 2 of the low-power weather-resistant cable insulation sheath temperature monitoring color-changing device described in the present application.

[0037] Figure 7 is a perspective structural schematic diagram of the auxiliary buckle of embodiment 2 of the low-power weather-resistant cable insulation sheath temperature monitoring color-changing device described in the present application.

[0038] Figure 8 is a schematic diagram of a double-circuit intelligent control system of embodiment 1 of the low-power weather-resistant cable insulation sheath temperature monitoring color-changing device.

[0039] Figure 9 is a schematic diagram of a three-dimensional structure of embodiment 2 of the low-power weather-resistant cable insulation sheath temperature monitoring color-changing device.

[0040] The reference signs are explained as follows:

[0041] 1, main buckle; 2, secondary buckle; 3, flexible heat-conducting pad; 4, connecting assembly; 41, rotating fixing head; 42, rotating groove; 43, notch; 44, stud; 45, nut; 5, standby circuit box; 6, working circuit box; 7, color-changing alarm; 8, rotating assembly. DETAILED DESCRIPTION

[0042] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application, in addition, the terms "first", "second" and the like are only for the purpose of description and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated, therefore, the features with "first", "second" and the like can explicitly or implicitly include one or more of the features, in the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0043] In the description of the present application, it should be noted that unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication between the two elements, and for those skilled in the art, the specific meaning of the above terms in the present application can be understood through specific circumstances.

[0044] The present application will be further described below in conjunction with the drawings:

[0045] Example 1

[0046] The application discloses a low-power-consumption weather-resistant cable insulation sheath temperature monitoring color-changing device, which comprises an external buckle carrier, a double-circuit intelligent control system and a full-dimension weather-resistant component.

[0047] As shown in the drawings, Figures 1-7 The buckle body is locked and fixed through a connecting component 4; the buckle body comprises a main buckle 1 and an auxiliary buckle 2, the auxiliary buckle 2 is provided with a threaded stud 44 at each corner, the threaded stud 44 is fixedly provided with a rotary fixing head 41 at the upper end, the threaded stud 44 is provided with a nut 45 at the lower end through thread connection, the main buckle 1 is provided with an oblong slot 43 at the position corresponding to the rotary fixing head 41, the slot 43 extends to the rotary slot 42 formed in the main buckle 1, and the rotary fixing head 41 is clamped in the rotary slot 42 after being rotated by 90 degrees through the slot 43.

[0048] As shown in the drawings, Figure 8 The double-circuit intelligent control system comprises a standby circuit arranged in the standby circuit box 5 and a working circuit arranged in the working circuit box 6, and is used for monitoring the temperature of the cable and executing early warning; the standby circuit is in a low-power-consumption sleep state when the temperature is lower than a preset threshold value (for example, 80 DEG C), and wakes up the working circuit when the temperature reaches or exceeds the preset threshold value, and the working circuit is configured to execute local color-changing warning and remote wireless alarm; the standby circuit comprises a negative temperature coefficient thermistor and an ultra-low-power-consumption microcontroller, and the negative temperature coefficient thermistor is arranged in the flexible heat-conducting pad 3; the working circuit comprises an RGB-LED lamp bead and a LoRa wireless communication module, the RGB-LED lamp bead is arranged in the color-changing alarm 7, and the color-changing alarm 7 is a frosted light-transmitting cover; the local color-changing warning is that the RGB-LED lamp bead emits yellow light when the temperature is in the range of the first threshold value 80 DEG C, and the RGB-LED lamp bead emits red light when the temperature reaches or exceeds the second threshold value 90 DEG C. The remote wireless alarm is that alarm information is sent to a remote monitoring center through the LoRa module.

[0049] The full-dimension weather-resistant component comprises a fluorocarbon coating sprayed on the outer surface of the buckle body, an acrylic three-protection paint coated on the surface of an internal printed circuit board, an interface element adopting IP67-level waterproof connection and a lithium sulfonyl chloride battery for supplying power to the whole device, and the battery cabin of the battery is provided with a polytetrafluoroethylene air-permeable film. The full-dimension weather-resistant component is used for protecting the device to stably operate for a long time in an outdoor harsh environment; the buckle body is made of glass fiber reinforced polyamide 66 material; the fluorocarbon coating contains nano-silicon dioxide anti-scratching agent.

[0050] In addition, the embodiment also discloses a cable temperature monitoring method, comprising:

[0051] Step S1: periodically collecting cable temperature at a first frequency through a standby circuit;

[0052] Step S2: maintaining a low-power sleep state when the collected temperature is lower than a preset threshold;

[0053] Step S3: waking up a working circuit when the collected temperature reaches or exceeds the preset threshold;

[0054] Step S4: starting local color change warning and remote wireless alarm through the working circuit;

[0055] Step S5: closing the working circuit and returning to the low-power sleep state when the temperature falls below the preset threshold.

[0056] Step S6: the remote wireless alarm comprises packaging device identification information, temperature value and early warning level, and periodically sending through a LoRa wireless communication module at a second frequency until the temperature falls below the preset threshold.

[0057] Specific implementation is to prepare a device for 10kV outdoor cable joint monitoring.

[0058] First, an external buckle type carrier is prepared. A PA66+GF30 material semi-arc buckle body is formed through injection molding process, and the inner diameter is 20mm to adapt to the target cable. A 0.5mm thick flexible silica gel heat conduction pad with a thermal conductivity of ≥1.2W / (m·K) is pasted on the inner side. The surface of the shell is sprayed with a fluorocarbon coating containing nano silicon dioxide. Secondly, a double-circuit intelligent control system is assembled. A NTC thermistor (NTC-MF52), an ultra-low power MCU (TI MSP430G2553), an RGB-LED lamp bead 8 (WS2812), a LoRa wireless module (RA-01) and necessary battery protection circuit are welded on a PCB board. After completion, the entire PCB board is coated with 20μm thick acrylic three-proof paint. The assembled circuit module is placed in the buckle body, connected with an IP67 level waterproof connector, and connected with a 3.6V / 19Ah lithium sulfonyl chloride battery. The battery compartment cover integrates a polytetrafluoroethylene breathable film.

[0059] Finally, installation and testing are carried out. A 10kV outdoor cable joint is selected, the main buckle 1 and the auxiliary buckle 2 of the device buckle body are opened, the main buckle 1 and the auxiliary buckle 2 clamp the cable joint, the inner heat-conducting pad is tightly attached to the outer sheath of the joint, then the rotating fixing head 41 is rotated 90° through the slot 43 and is clamped in the rotating groove 42, the nut 45 is tightened to complete the installation and fixation of the buckle body. The temperature threshold is set to 80℃ (yellow warning) and 90℃ (red alarm) through the remote terminal. The test shows that the LoRa communication is stable within 2km distance. Under normal circumstances, the standby current of the device is lower than 0.1μA; when the temperature is simulated to 85℃, the LED accurately lights up yellow and sends a warning signal; when the temperature rises to 92℃, the LED switches to red and sends an alarm signal; after stopping heating, the temperature drops to 78℃, the device automatically cuts off the LED and LoRa, and returns to standby mode, the power consumption of single warning is low

[0060] Example 2

[0061] As shown in Figure 9 , the difference between this embodiment and example 1 is that one end of the buckle body is locked and fixed through the connecting assembly 4, and the other end is connected through the rotating assembly 8. The rotating assembly 8 is a hinge structure, which makes one side of the main buckle 1 and the auxiliary buckle 2 rotate, and the other side is fixed for operation, which is more convenient for installation and operation.

[0062] The above shows and describes the basic principles, main features and advantages of the present application. It should be understood by those skilled in the art that the present application is not limited by the above examples. The above examples and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the present application.

Claims

1. A low-power, weather-resistant cable insulation sheath temperature monitoring and color-changing device, characterized in that, include: External snap-on carrier for detachable fixation to the outside of the cable; A dual-circuit intelligent control system is installed inside the external snap-fit ​​carrier to monitor cable temperature and issue early warnings. All-dimensional weather-resistant components are used to protect the device for long-term stable operation in harsh outdoor environments; The external snap-on carrier includes a semi-arc-shaped snap-on body that can be opened and closed. A flexible heat-conducting pad (3) is provided on the inner side of the snap-on body for tightly fitting with the cable insulation sheath. The dual-circuit intelligent control system includes a standby circuit and a working circuit. The standby circuit is in a low-power sleep state when it detects that the temperature is below a preset threshold, and wakes up the working circuit when the temperature reaches or exceeds the preset threshold. The working circuit is configured to perform local color-changing warnings and remote wireless alarms.

2. The low-power weather-resistant cable insulation sheath temperature monitoring and color-changing device according to claim 1, characterized in that: The buckle body is made of glass fiber reinforced polyamide 66 material; the buckle body is locked and fixed by the connecting component (4).

3. The low-power weather-resistant cable insulation sheath temperature monitoring and color-changing device according to claim 1, characterized in that: The buckle body includes a main buckle (1) and a secondary buckle (2). The secondary buckle (2) has studs (44) at its four corners. A rotating fixing head (41) is fixedly installed on the upper end of the stud (44). A nut (45) is threaded onto the lower end of the stud (44). The main buckle (1) has an oblong slot (43) corresponding to the position of the rotating fixing head (41). The slot (43) extends into the main buckle (1) and has a rotating groove (42). The rotating fixing head (41) passes through the slot (43), rotates 90°, and then gets stuck in the rotating groove (42).

4. The low-power weather-resistant cable insulation sheath temperature monitoring and color-changing device according to claim 1, characterized in that: The standby circuit includes a negative temperature coefficient thermistor and an ultra-low power microcontroller. The negative temperature coefficient thermistor is disposed in a flexible thermal pad (3). The working circuit includes RGB-LED beads and a LoRa wireless communication module.

5. The low-power weather-resistant cable insulation sheath temperature monitoring and color-changing device according to claim 1, characterized in that: The local color-changing warning is as follows: when the temperature is within the first threshold range, the RGB-LED light bead emits yellow light; when the temperature reaches or exceeds the second threshold, the RGB-LED light bead emits red light; and a frosted light-transmitting window is provided on the buckle body corresponding to the position of the RGB-LED light bead.

6. The low-power weather-resistant cable insulation sheath temperature monitoring and color-changing device according to claim 1, characterized in that: The all-dimensional weather-resistant components include: A fluorocarbon coating is sprayed onto the outer surface of the buckle body; Acrylic conformal coating applied to the surface of the internal printed circuit board; Interface components with IP67-rated waterproof connection; And a lithium thionyl chloride battery that powers the entire device, the battery compartment of which is provided with a polytetrafluoroethylene breathable membrane.

7. The low-power weather-resistant cable insulation sheath temperature monitoring and color-changing device according to claim 1, characterized in that: The fluorocarbon coating contains a nano-silica anti-scratch agent.

8. The low-power weather-resistant cable insulation sheath temperature monitoring and color-changing device according to claim 1, characterized in that: One end of the buckle body is locked and fixed by the connecting component (4), and the other end is rotated and connected by the rotating component (8).

9. A cable temperature monitoring method, applied to the external low-power weather-resistant cable insulation sheath temperature monitoring and color-changing device as described in any one of claims 1-7, characterized in that, The method includes: The cable temperature is periodically collected at a first frequency through the standby circuit; When the collected temperature is lower than the preset threshold, maintain a low-power sleep state; When the collected temperature reaches or exceeds the preset threshold, the working circuit is activated. The local color-changing warning and remote wireless alarm are activated through the aforementioned working circuit; When the temperature drops below the preset threshold, the operating circuit is shut down, and the system returns to the low-power sleep state.

10. The method according to claim 8, characterized in that, The remote wireless alarm includes packaging device identification information, temperature value, and warning level, and periodically transmitting them at a second frequency via a LoRa wireless communication module until the temperature drops below the preset threshold.

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