A cable branch box fault monitoring and alarming device

Abstract

The present application relates to cable monitoring technical field, specifically to a kind of cable branch box fault monitoring alarm device, including cable branch box and the cable connected in its inside, still include fixed frame, the side of fixed frame is provided with clamping assembly, clamping assembly includes a pair of the arc clamping piece that can be clamped cable, the slide bar of axially slidably being located in fixed frame and the pressing piece connected to its front end;Cooling adsorption mechanism, including motor in slide bar and the fan blade driven by motor, air hole being opened in slide bar;Monitoring module, including for detecting vibration signal acceleration sensor, for detecting temperature signal thermocouple and for detecting load current signal power frequency current transformer;Self-adapting adjustment system, for controlling clamping assembly to increase the clamping force to cable to suppress vibration according to the monitoring signal of acceleration sensor, and according to the monitoring signal of thermocouple, cooling airflow is discharged through air hole to heat dissipation to cable is started.

Description

Technical Field

[0001] This invention relates to the field of cable monitoring technology, specifically to a fault monitoring and alarm device for cable branch boxes. Background Technology

[0002] With the deepening of cable-based transformation of urban power distribution networks in my country, 10kV cable distribution boxes, as key equipment for solving the problem of multi-circuit cable distribution, have been widely used in urban power distribution networks. However, in actual operation, due to substandard installation and construction processes, lax acceptance checks, and inadequate operation and maintenance, cable distribution box failures occur frequently, seriously affecting the safe and stable operation of the power distribution network. According to statistics, common failure types of cable distribution boxes include poor contact, insulation deterioration, short circuit grounding, and mechanical damage. Among them, poor contact accounts for about 35%, insulation problems account for about 28%, and short circuit faults account for about 20%.

[0003] For example, patent document CN119716405A relates to the technical field of cable testing and discloses a method and device for detecting defects and faults in wires and cables. This invention obtains the burial route information and test characteristics of the target cable, analyzes and determines the location of the cable testing endpoint, deploys corresponding testing instruments according to the location of the testing endpoint, and uses the deployed instruments to perform multiple tests, including electrical pulse reflection test, sheath grounding loop current test, infrared thermometry test, etc., collects multi-item test data of the cable, performs comprehensive analysis of the multi-item test data, and accurately locates the cable defects and faults, improving the accuracy and efficiency of fault location. It can adapt to complex cable network environments, has strong flexibility and practicality, and solves the problem of difficult accurate location of cable defects and faults in the prior art.

[0004] While the aforementioned existing technologies can accurately locate cable defects through comprehensive analysis of multiple test data, effectively improving the accuracy and efficiency of fault diagnosis, in actual operating environments, cable temperature and current parameters exhibit dynamic fluctuations due to various factors such as load fluctuations, ambient temperature changes, and mechanical vibrations. Because existing monitoring devices only possess passive monitoring capabilities and lack the ability to actively adjust for fluctuations in operating parameters, the system struggles to distinguish between normal operating condition fluctuations and abnormal fault symptoms. This can easily lead to misinterpreting normal parameter fluctuations as fault warnings, resulting in false alarms and reducing the reliability and practicality of the monitoring system. Therefore, this application proposes a cable branch box fault monitoring and alarm device. Summary of the Invention

[0005] The purpose of this invention is to provide a cable branch box fault monitoring and alarm device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a cable branch box fault monitoring and alarm device, comprising a cable branch box and cables connected therein, and further comprising: A fixing frame, wherein a clamping assembly is provided on one side of the fixing frame, the clamping assembly including a pair of arc clamps for clamping cables, a slide rod slidably disposed in the fixing frame, and a pressure plate connected to its front end; The cooling adsorption mechanism includes a motor and fan blades driven by the motor located inside the slide bar, and air holes opened inside the slide bar. An expandable, variable-size gasket is provided on the side of the arc clamp; The monitoring module includes an accelerometer for detecting vibration signals, a thermocouple for detecting temperature signals, and a power frequency current transformer for detecting load current signals. An adaptive adjustment system is used to control the clamping assembly to increase the clamping force on the cable to suppress vibration based on the monitoring signal of the acceleration sensor, and to activate the cooling airflow to dissipate heat from the cable through the air hole based on the monitoring signal of the thermocouple.

[0007] Preferably, the clamping assembly further includes a torsion spring rod rotatably connected within the slide rod, the arc clamping piece is connected to the outer surface of the torsion spring rod, a lever is fixedly connected to the outer surface of the arc clamping piece, and a triangular contact piece that abuts against the lever is provided on the outer surface of the slide rod.

[0008] Preferably, it further includes an adjustment mechanism, which includes a micro motor fixedly connected to the rear end of the slide rod. The output end of the micro motor extends into the slide rod and is fixedly connected to a screw. A sliding plate is threaded onto the outer surface of the screw. A connecting seat is fixedly connected to one side of the sliding plate. A limiting crank sleeved outside the connecting seat is fixedly connected to one side of the triangular contact plate.

[0009] Preferably, the cooling adsorption mechanism further includes an electric push rod fixedly connected to the slide rod, the output end of the electric push rod being fixedly connected to a piston blocking rod, the piston end of the piston blocking rod being slidably connected to an air hole, and the air hole having a wide opening with a diameter greater than its own.

[0010] Preferably, the torsion spring rod is provided with a sealing oil cavity, and a partition plate is provided in the sealing oil cavity for separation. A liquid-pushing rotary plate is rotatably connected to the middle end of the partition plate. The liquid-pushing rotary plate is coaxially connected to the torsion spring rod. It also includes an oil passage that connects the sealing oil cavity to the internal cavity of the variable gasket. When the torsion spring rod rotates, it drives the liquid-pushing rotary plate to squeeze the oil in the sealing oil chamber, so that it is injected into the variable gasket through the oil passage, causing the variable gasket to expand to increase the contact area and pressure with the cable.

[0011] Preferably, it also includes a fault diagnosis module, which is connected to the power frequency current transformer, the acceleration sensor, the thermocouple and the adaptive adjustment system; When the power frequency current transformer detects an abnormal load current, it triggers the adaptive adjustment system to sequentially perform vibration suppression and cooling operations. If the monitoring data of the power frequency current transformer returns to normal after vibration suppression and cooling operations, it is determined that the current abnormality was caused by vibration or temperature. If the monitoring data of the power frequency current transformer is still abnormal after vibration suppression and cooling operations, it is determined that the current abnormality is caused by other faults in the cable itself.

[0012] Preferably, the cable branch box has an internal mounting plate fixedly connected to it, and the fixing frame can be constructed to have multiple parts fixedly connected to one side of the mounting plate.

[0013] Preferably, an ultrasonic sensor is fixedly connected inside the cable branch box.

[0014] Preferably, the power frequency current transformer is fixedly connected to the middle end of the pressure plate, the acceleration sensor is fixedly connected inside the pressure plate, a barbed abutment is fixedly connected to one side of the arc clamp, and the thermocouple is fixedly connected inside the barbed abutment.

[0015] Preferably, the cable branch box has a door on one side, and the inside of the cable branch box is fixedly connected to an interface for connecting to cables.

[0016] Compared with the prior art, the beneficial effects of the present invention are: 1. Through the coordinated operation of a power frequency current transformer, an accelerometer, a thermocouple, and an ultrasonic sensor, key parameters such as cable load current, vibration and shock, temperature changes, and partial discharge can be collected in real time, achieving comprehensive perception of the cable's operating status. In particular, the layout design—with the power frequency current transformer fixed in the middle of the clamping plate, the accelerometer embedded inside the clamping plate, and the thermocouple placed within the inverted hook abutment—ensures close contact between the sensors and the cable, greatly improving the accuracy and reliability of the monitoring data and providing a solid data foundation for fault diagnosis. The precise coordination of the arc clamp, inverted hook abutment, torsion spring rod, lever, slide rod, and clamping plate forms an adaptive clamping mechanism. When the cable is inserted, it first contacts the inverted hook abutment, causing the arc clamp to flip open. Then, it contacts the clamping plate, pushing the slide rod to slide, causing the triangular contact to contact the lever, driving the torsion spring rod to rotate and close the arc clamp to hold the cable.

[0017] 2. When the thermocouple detects an excessively high temperature, the system automatically reduces the clamping force to allow the cable to expand thermally. A motor drives the fan blades to generate airflow, which, in conjunction with the electric actuator driving the piston-air-blocking rod within the air vents, creates negative pressure, achieving efficient heat dissipation. This proactive intervention significantly improves the device's practicality and reliability. The coordinated operation of the motor, fan blades, air vents, electric actuator, and piston-air-blocking rod forms a cooling system that combines active heat dissipation with negative pressure adsorption. The electric actuator driving the piston-air-blocking rod within the air vents generates negative pressure, enhancing the adhesion of the pressure plate to the cable.

[0018] 3. When the accelerometer detects abnormal vibration, the micro motor drives the screw to rotate, causing the shifting plate to rotate via the connecting seat and the limiting crank, further clamping the cable with the arc clamp. Simultaneously, the torsion spring rotates, causing the hydraulic pusher to inject oil into the variable gasket, expanding it and increasing the contact area. This forms a dual vibration damping mechanism, effectively suppressing vibration transmission. The variable gasket is located on the side of the arc clamp. Intelligent expansion of the gasket is achieved through a hydraulic system consisting of a sealed oil chamber within the torsion spring, a partition plate, and the hydraulic pusher. When the torsion spring rotates, the hydraulic pusher injects oil through the oil passage into the variable gasket, causing it to expand and increase the contact area and pressure with the cable. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic cross-sectional view of the cable branch box in this invention; Figure 3 This is a schematic diagram of the fixing frame in this invention; Figure 4 For the present invention Figure 3 Enlarged structural diagram at point A; Figure 5 This is a schematic cross-sectional view of the fixing frame and cable in this invention; Figure 6 This is a cross-sectional structural diagram of the fixing frame in this invention; Figure 7 This is a schematic cross-sectional view of the compression tablet in this invention; Figure 8 For the present invention Figure 7 Enlarged structural diagram at point B; Figure 9 This is a schematic diagram of the top cross-sectional structure of the slide bar in this invention; Figure 10 This is a frontal cross-sectional view of the slide bar in this invention. Figure 11 This is a schematic cross-sectional view of the arc clamp in this invention; Figure 12 For the present invention Figure 11 Enlarged schematic diagram of the structure at point C.

[0020] In the diagram: 100, Cable branch box; 101, Box door; 102, Cable; 103, Interface; 104, Ultrasonic sensor; 105, Thermocouple; 106, Power frequency current transformer; 107, Accelerometer; 200, Fixing frame; 201, Arc clamp; 202, Barbed abutment; 203, Torsion spring rod; 204, Paddle plate; 205, Slide rod; 206, Pressure plate; 207, Triangular contact piece; 208, Return spring. 209. Spring; 210. Micro motor; 211. Screw; 212. Shifting plate; 213. Connecting seat; 214. Limiting crank; 215. Sealing plate; 216. Vent hole; 217. Rotary sealing plate; 300. Mounting plate; 301. Air hole; 302. Motor; 303. Fan blade; 304. Wide opening; 305. Piston air-blocking rod; 306. Electric actuator; 400. Variable gasket; 401. Divider plate; 402. Liquid-pushing rotary plate. Detailed Implementation

[0021] 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.

[0022] Example 1: Please refer to Figure 1 - Figure 12 The present invention provides a technical solution: a cable branch box fault monitoring and alarm device, including a cable branch box 100 and a cable 102 connected inside it. A door 101 is opened on one side of the cable branch box 100, and an interface 103 for connecting with the cable 102 is fixedly connected inside the cable branch box 100.

[0023] It also includes a fixing frame 200, on one side of which a clamping assembly is provided. The clamping assembly includes a pair of arc clamping pieces 201 that can clamp the cable 102, a slide rod 205 that can be axially slidably disposed in the fixing frame 200, and a pressure plate 206 connected to its front end. The monitoring module includes an acceleration sensor 107 for detecting vibration signals, a thermocouple 105 for detecting temperature signals, and a power frequency current transformer 106 for detecting load current signals. An ultrasonic sensor 104 is fixedly connected inside the cable branch box 100. The power frequency current transformer 106 is fixedly connected to the middle end of the pressure plate 206. The acceleration sensor 107 is fixedly connected inside the pressure plate 206. A barbed abutment 202 is fixedly connected to one side of the arc clamp 201. The thermocouple 105 is fixedly connected inside the barbed abutment 202.

[0024] The clamping assembly also includes a torsion spring rod 203 rotatably connected to the slide rod 205, an arc clamping piece 201 connected to the outer surface of the torsion spring rod 203, a lever plate 204 fixedly connected to the outer surface of the arc clamping piece 201, and a triangular contact piece 207 that abuts against the lever plate 204 on the outer surface of the slide rod 205. When the slide rod 205 slides backward, it pushes the triangular contact piece 207 to flip, thereby driving the torsion spring rod 203 to rotate through the lever plate 204, so that a pair of arc clamping pieces 201 close.

[0025] It also includes an adjustment mechanism, which includes a micro motor 209 fixedly connected to the rear end of the slide bar 205. The output end of the micro motor 209 extends into the slide bar 205 and is fixedly connected to a screw 210. A sliding piece 211 is threadedly connected to the outer surface of the screw 210. A connecting seat 212 is fixedly connected to one side of the sliding piece 211. A limiting crank 213 sleeved outside the connecting seat 212 is fixedly connected to one side of the triangular contact piece 207. The micro motor 209 drives the screw 210 to rotate, which moves the sliding piece 211. Then, the connecting seat 212 and the limiting crank 213 pull the triangular contact piece 207 to flip, thereby increasing the clamping force on the cable 102.

[0026] Specifically, during use, by opening the box door 101, the cable 102 can be connected to the interface 103. Simultaneously, the cable 102 is inserted into the fixing frame 200. The cable 102 will first contact the barbed abutment 202, causing the arc clamp 201 to flip open. Then, it will contact the pressure plate 206, causing the sliding rod 205 to slide within the fixing frame 200. This, in turn, causes the 07 plates on both sides of the sliding rod 205 to contact the lever plate 204, simultaneously causing the torsion spring rod 203 to rotate and drive the arc clamp 201 to move and close together, thus causing the barbed abutment 202 to contact the electrical... The cable 102 is clamped on the outside. The power frequency current transformer 106 and the acceleration sensor 107 inside the pressure plate 206 can detect the cable 102. The power frequency current transformer 106 can detect the load current for short circuit detection, while the acceleration sensor 107 can detect the vibration and impact on the cable 102. The thermocouple 105 inside the hook plate 202 can detect the temperature of the cable 102. When the cable 102 is subjected to high frequency vibration or high temperature, the detection data of the power frequency current transformer 106 will be abnormal.

[0027] In summary, through the coordinated operation of the power frequency current transformer 106, the accelerometer 107, the thermocouple 105, and the ultrasonic sensor 104, a multi-physics coupled monitoring system integrating electromechanical, thermal, and acoustic fields is constructed. This system can collect key parameters of the cable 102 in real time, such as load current, vibration and shock, temperature changes, and partial discharge, achieving comprehensive perception of the cable's operating status. In particular, the layout design—with the power frequency current transformer 106 fixed in the middle of the clamping plate 206, the accelerometer 107 embedded inside the clamping plate 206, and the thermocouple 105 placed within the inverted hook abutment 202—ensures close contact between the sensors and the cable 102, greatly improving the accuracy and reliability of the monitoring data and providing a solid data foundation for fault diagnosis. The precise coordination of the arc clamp 201, the inverted hook abutment 202, the torsion spring rod 203, the lever 204, the slide rod 205, and the clamping plate 206 forms an adaptive clamping mechanism. When cable 102 is inserted, it first contacts the barbed abutment piece 202, causing the arc clamp piece 201 to flip open. Then it contacts the pressure piece 206, pushing the slide rod 205 to slide, which drives the triangular contact piece 207 to contact the dial plate 204, driving the torsion spring rod 203 to rotate, causing the arc clamp piece 201 to close and clamp the cable 102.

[0028] Example 2: Please refer to Figure 1 - Figure 12 The present invention also provides a technical solution, which differs from the technical solution of Embodiment 1 as follows: a cable branch box fault monitoring and alarm device. The device also includes a cooling and adsorption mechanism, comprising a motor 301 housed within a slide rod 205, a fan blade 302 driven by the motor 301, and an air vent 300 formed within the slide rod 205. The cooling and adsorption mechanism further includes an electric actuator 305 fixedly connected within the slide rod 205. A piston-blocking rod 304 is fixedly connected to the output end of the electric actuator 305. The piston end of the piston-blocking rod 304 is slidably connected within the air vent 300. The air vent 300 has a wide opening 303 with a diameter larger than its own. By setting the piston-blocking rod 304, it can move under the driving force of the electric actuator 305, causing negative pressure to be generated in the air vent 300, which can further improve the support for the cable 102. The piston-blocking rod 304 has a cylindrical structure and a sealing ring on its surface, which can effectively prevent gas leakage. The wide opening 303 has a trumpet-shaped structure, which can effectively increase the gas flow rate.

[0029] It also includes an adaptive adjustment system that, based on the monitoring signal of thermocouple 105, activates a cooling airflow to discharge through vent 300 to dissipate heat from cable 102. When thermocouple 105 detects that the temperature exceeds the second threshold, it controls the clamping assembly to reduce the clamping force on cable 102 and activates the cooling adsorption mechanism to dissipate heat from cable 102.

[0030] Specifically, simultaneously activating the electric actuator 305 within the mounting bracket 200 causes the connected piston air-blocking rod 304 to move within the air hole 300. This generates negative pressure in the air hole 300, further enhancing the adhesion of the pressure plate 206 to the cable 102. When the thermocouple 105 detects that the cable 102 is at a high temperature, the drive screw 210 moves directionally, changing the angle of the triangular contact 207, causing the dial plate 204 to reset a certain distance. This reduces the clamping force on the cable 102, allowing for thermal expansion of the cable 102. Subsequently, the screw 210... The reverse rotation changes the position of the rotary sealing plate 216, allowing external gas to pass through the vent 215 inside the sealing plate 214. Simultaneously, the motor 301 drives the fan blade 302 to rotate, disturbing the airflow and allowing external airflow to enter the cavity inside the fixed frame 200 through the vent 215. At the same time, the electric actuator 305 moves the piston-blocking rod 304 so that the piston end of the piston-blocking rod 304 is inside the wide opening 303. At this point, the gas inside the cavity of the fixed frame 200 is discharged through the vent 300 and blown onto the surface of the cable 102, achieving cooling. In summary, when thermocouple 105 detects an excessively high temperature, the system automatically reduces the clamping force to allow the cable 102 to expand thermally. The motor 301 drives the fan blade 302 to generate airflow, which, in conjunction with the electric actuator 305 driving the piston-blocking rod 304 to move within the air hole 300, generates negative pressure, achieving efficient heat dissipation. This proactive intervention significantly improves the practicality and reliability of the device. The coordinated operation of the motor 301, fan blade 302, air hole 300, electric actuator 305, and piston-blocking rod 304 forms a cooling system combining active heat dissipation and negative pressure adsorption. The electric actuator 305 drives the piston-blocking rod 304 to move within the air hole 300, generating negative pressure and enhancing the adsorption force of the pressure plate 206 on the cable 102.

[0031] Example 3: Please refer to Figure 1 - Figure 12 The present invention also provides a technical solution, which differs from the technical solution of Embodiment 1 as follows: a cable branch box fault monitoring and alarm device.

[0032] It also includes an expandable variable gasket 400, which is disposed on the side of the arc clamp 201. A sealing oil cavity is provided inside the torsion spring rod 203, and a partition plate 401 is provided inside the sealing oil cavity for separation. A liquid-pushing rotary plate 402 is rotatably connected to the middle end of the partition plate 401. The liquid-pushing rotary plate 402 is coaxially connected to the torsion spring rod 203. It also includes an oil passage that connects the sealing oil cavity and the internal cavity of the variable gasket 400. When the torsion spring rod 203 rotates, it drives the liquid-pushing rotary plate 402 to squeeze the oil in the sealing oil chamber, so that it is injected into the variable gasket 400 through the oil passage, causing the variable gasket 400 to expand to increase the contact area and pressure with the cable 102.

[0033] An adaptive adjustment system is used to control the clamping assembly to increase the clamping force on the cable 102 to suppress vibration based on the monitoring signal of the acceleration sensor 107. When the acceleration sensor 107 detects that the vibration exceeds a first threshold, the clamping assembly is controlled to increase the clamping force on the cable 102. It also includes a fault diagnosis module, which is connected to the power frequency current transformer 106, the acceleration sensor 107, the thermocouple 105 and the adaptive adjustment system. When the power frequency current transformer 106 detects an abnormal load current, it triggers the adaptive adjustment system to sequentially perform vibration suppression and cooling operations. If the monitoring data of the power frequency current transformer 106 returns to normal after vibration suppression and cooling operations, it is determined that the current abnormality is caused by vibration or temperature. If the monitoring data of the power frequency current transformer 106 is still abnormal after vibration suppression and cooling operations, it is determined that the current abnormality is caused by other faults in the cable 102 itself.

[0034] The above-mentioned vibration reduction and cooling operations can adjust the working environment of cable 102. After the working environment is restored, observe whether the load current monitoring of cable 102 by power frequency current transformer 106 is normal. When the power frequency current transformer 106 indicates normal, it can be known that the abnormal load current is due to vibration or temperature. However, if the indication of power frequency current transformer 106 is still abnormal after vibration and temperature adjustment, it is determined that the fault is caused by other reasons.

[0035] Integrating monitoring, alarm, vibration suppression, cooling, and diagnostic functions, this device forms a complete intelligent closed-loop system. Specifically, it not only provides comprehensive status sensing through ultrasonic sensors 104, power frequency current transformers 106, accelerometers 107, and thermocouples 105, but also actively intervenes by driving the actuators through an adaptive adjustment system. When vibration is detected, it automatically controls the vibration suppression mechanism to increase the clamping force; when overheating is detected, it automatically controls the cooling adsorption mechanism to dissipate heat. This integrated capability of sensing, judgment, and execution shifts the fault handling mode from post-event maintenance to in-process suppression and pre-event prevention, greatly improving power supply reliability.

[0036] Specifically, when the accelerometer 107 detects that the cable 102 is vibrating, the vibration can be suppressed by tightening the arc clamp 201 so that the barbed abutment 202 applies a greater clamping force to the cable 102. The micro motor 209 is turned on to drive the screw 210 to rotate, which in turn drives the shift plate 211 to move. The shift plate 211 moves and drives one end of the limit crank 213 to shift through the connecting seat 212, thereby driving the triangular contact plate 207 to flip. At this time, the triangular contact plate 207 can pull the dial plate 204 to move further when the slide bar 205 is stationary. Thus, the arc clamp 201 is clamped through the barbed abutment 202. At the same time, as the torsion spring rod 203 rotates, the liquid pushing plate 402 inside it will move. At this time, the liquid pushing plate 402 will squeeze the oil flow inside the torsion spring rod 203 and located on one side of the partition plate 401. At this time, the oil will be transported to the variable gasket 400 through the arc clamp 201, causing it to expand and increase the adhesion force with the side of the cable 102.

[0037] In summary, when the accelerometer 107 detects abnormal vibration, the micro motor 209 drives the screw 210 to rotate, causing the shift plate 211 to pull the triangular contact plate 207 to flip through the connecting seat 212 and the limiting crank 213. This causes the arc clamp plate 201 to further clamp the cable 102. At the same time, the torsion spring rod 203 rotates, causing the hydraulic pusher plate 402 to squeeze oil into the variable gasket 400, causing it to expand and increase the contact area, forming a dual vibration suppression mechanism that effectively suppresses vibration transmission. The variable gasket 400 is located on the side of the arc clamp plate 201. Through the hydraulic system composed of the sealed oil chamber in the torsion spring rod 203, the partition plate 401, and the hydraulic pusher plate 402, the gasket's intelligent expansion is achieved. When the torsion spring rod 203 rotates, the hydraulic pusher plate 402 squeezes oil through the oil passage and injects it into the variable gasket 400, causing it to expand and increase the contact area and pressure with the cable 102.

[0038] Working principle: When in use, the cable 102 can be connected to the interface 103 by opening the box door 101, and the wire of the cable 102 can be inserted into the fixing frame 200 at the same time. The cable 102 will first come into contact with the barbed abutment 202, causing the arc clamp 201 to flip open. Then it will come into contact with the pressure plate 206, thereby driving the slide bar 205 to slide within the fixed frame 200. This will cause the 07 on both sides of the slide bar 205 to come into contact with the lever 204. At the same time, the torsion spring rod 203 will rotate, driving the arc clamp 201 to move and close together. This will cause the barbed abutment 202 to come into contact with the outside of the cable 102 to achieve clamping. At the same time, the electric push rod 305 in the fixed frame 200 will be activated, causing the piston air-blocking rod 304 connected to it to move inside the air hole 300. At this time, the air hole 300 will generate negative pressure, thereby further increasing the adsorption force of the pressure plate 206 on the cable 102. The power frequency current transformer 106 and the acceleration sensor 107 inside the pressure plate 206 can detect the cable 102. The power frequency current transformer 106 can detect the load current for short circuit detection, while the acceleration sensor 107 can detect the vibration and impact on the cable 102. The thermocouple 105 inside the hook plate 202 can detect the temperature of the cable 102. When the cable 102 is subjected to high frequency vibration or high temperature, it will cause the power frequency current transformer 106 to detect abnormal data. When the accelerometer 107 detects that the cable 102 is vibrating, the vibration can be suppressed by tightening the arc clamp 201 so that the barbed abutment 202 applies a greater clamping force to the cable 102. The micro motor 209 is turned on to drive the screw 210 to rotate, which drives the shift plate 211 to move. The shift plate 211 moves and drives one end of the limit crank 213 to shift through the connecting seat 212, thereby driving the triangular contact plate 207 to flip. At this time, the triangular contact plate 207 can pull the dial plate 204 to move further when the slide bar 205 is stationary. Thus, the arc clamp 201 is clamped through the barbed abutment 202. At the same time, as the torsion spring rod 203 rotates, the internal liquid pushing plate 402 moves. At this time, the liquid pushing plate 402 will squeeze the oil flow inside the torsion spring rod 203 and located on one side of the partition plate 401. At this time, the oil will be transported to the variable gasket 400 through the arc clamp 201, causing it to expand and increase the adhesion force with the side of the cable 102. When the thermocouple 105 detects that the cable 102 is at a high temperature, the drive screw 210 moves in a direction to change the angle of the triangular contact 207, causing the dial plate 204 to reset a certain distance. At this time, the clamping force on the cable 102 will be reduced to allow the cable 102 to expand thermally. Then, the reverse rotation of the screw 210 will change the position of the rotating sealing plate 216, allowing external gas to pass through the vent hole 215 in the sealing plate 214. At the same time, the motor 301 is turned on to drive the fan blade 302 to rotate and disturb the airflow, allowing the external airflow to enter the cavity inside the fixing frame 200 through the vent hole 215. At the same time, the electric push rod 305 is operated to drive the piston blocking rod 304 to move so that the piston end of the piston blocking rod 304 is inside the wide opening 303. At this time, the gas in the cavity of the fixing frame 200 will be discharged through the air hole 300 and blown onto the surface of the cable 102 to achieve cooling. The above-mentioned vibration reduction and cooling operations can adjust the working environment of cable 102. After the working environment is restored, observe whether the load current monitoring of cable 102 by power frequency current transformer 106 is normal. When the power frequency current transformer 106 indicates normal, it can be known that the abnormal load current is due to vibration or temperature. However, if the indication of power frequency current transformer 106 is still abnormal after vibration and temperature adjustment, it is determined that the fault is caused by other reasons.

[0039] 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.

[0040] 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 fault monitoring and alarm device for a cable branch box, comprising a cable branch box (100) and a cable (102) connected therein, characterized in that, Also includes: A fixing frame (200) is provided on one side with a clamping assembly, which includes a pair of arc clamps (201) for clamping cables (102), a slide bar (205) axially slidably disposed in the fixing frame (200), and a pressure plate (206) connected to its front end. The cooling adsorption mechanism includes a motor (301) installed in the slide bar (205), a fan blade (302) driven by the motor (301), and an air hole (300) opened in the slide bar (205). An expandable, variable-size gasket (400) is disposed on the side of the arc clamp (201); The monitoring module includes an accelerometer (107) for detecting vibration signals, a thermocouple (105) for detecting temperature signals, and a power frequency current transformer (106) for detecting load current signals. An adaptive adjustment system is used to control the clamping assembly to increase the clamping force on the cable (102) to suppress vibration based on the monitoring signal of the acceleration sensor (107), and to start the cooling airflow to be discharged through the air hole (300) to dissipate heat from the cable (102) based on the monitoring signal of the thermocouple (105).

2. The cable branch box fault monitoring and alarm device according to claim 1, characterized in that: The clamping assembly also includes a torsion spring rod (203) rotatably connected to the slide rod (205), an arc clamp (201) connected to the outer surface of the torsion spring rod (203), a lever (204) fixedly connected to the outer surface of the arc clamp (201), and a triangular contact piece (207) abutting against the lever (204) on the outer surface of the slide rod (205).

3. The cable branch box fault monitoring and alarm device according to claim 2, characterized in that: It also includes an adjustment mechanism, which includes a micro motor (209) fixedly connected to the rear end of the slide bar (205). The output end of the micro motor (209) extends into the slide bar (205) and is fixedly connected to a screw (210). A sliding plate (211) is threadedly connected to the outer surface of the screw (210). A connecting seat (212) is fixedly connected to one side of the sliding plate (211). A limiting crank (213) sleeved outside the connecting seat (212) is fixedly connected to one side of the triangular contact plate (207).

4. The cable branch box fault monitoring and alarm device according to claim 1, characterized in that: The cooling adsorption mechanism also includes an electric push rod (305) fixedly connected in the slide rod (205). The output end of the electric push rod (305) is fixedly connected to a piston blocking rod (304). The piston end of the piston blocking rod (304) is slidably connected in the air hole (300). The air hole (300) has a wide opening (303) with a diameter greater than its own.

5. A cable branch box fault monitoring and alarm device according to claim 2, characterized in that: The torsion spring rod (203) is provided with a sealing oil cavity, and a partition plate (401) is provided in the sealing oil cavity for separation. A liquid-pushing rotary plate (402) is rotatably connected to the middle end of the partition plate (401). The liquid-pushing rotary plate (402) is coaxially connected with the torsion spring rod (203) and also includes an oil passage, which connects the sealing oil cavity with the internal cavity of the variable gasket (400). When the torsion spring rod (203) rotates, it drives the liquid-pushing rotary plate (402) to squeeze the oil in the sealing oil chamber, so that it is injected into the variable gasket (400) through the oil passage, causing the variable gasket (400) to expand to increase the contact area and pressure with the cable (102).

6. The cable branch box fault monitoring and alarm device according to claim 1, characterized in that: It also includes a fault diagnosis module, which is connected to the power frequency current transformer (106), the acceleration sensor (107), the thermocouple (105) and the adaptive adjustment system; When the power frequency current transformer (106) detects an abnormal load current, it triggers the adaptive adjustment system to perform vibration suppression and cooling operations in sequence. If the monitoring data of the power frequency current transformer (106) returns to normal after the vibration suppression and cooling operation, it is determined that the current abnormality is caused by vibration or temperature. If the monitoring data of the power frequency current transformer (106) is still abnormal after the vibration suppression and cooling operations, it is determined that the current abnormality is caused by other faults in the cable (102).

7. The cable branch box fault monitoring and alarm device according to claim 1, characterized in that: The cable branch box (100) is internally fixedly connected to a mounting plate (217), and the fixing frame (200) can be constructed to have multiple fixed connections to one side of the mounting plate (217).

8. The cable branch box fault monitoring and alarm device according to claim 1, characterized in that: An ultrasonic sensor (104) is fixedly connected inside the cable branch box (100).

9. A cable branch box fault monitoring and alarm device according to claim 1, characterized in that: The power frequency current transformer (106) is fixedly connected to the middle end of the pressure plate (206), the acceleration sensor (107) is fixedly connected inside the pressure plate (206), a barbed abutment (202) is fixedly connected to one side of the arc clamp (201), and the thermocouple (105) is fixedly connected inside the barbed abutment (202).

10. A cable branch box fault monitoring and alarm device according to claim 1, characterized in that: The cable branch box (100) has a door (101) on one side, and the cable branch box (100) has an interface (103) fixedly connected inside for connecting to the cable (102).

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