Lightning arrester partial discharge on-line positioning device and monitoring method

Abstract

The invention discloses a lightning arrester partial discharge on-line positioning device and a monitoring method, and relates to the technical field of detection.The lightning arrester partial discharge on-line positioning device comprises a cabinet body, a partial discharge on-line positioning device body is installed at the bottom of the inner side of the cabinet body, a self-locking telescopic moving mechanism is arranged at the bottom of the cabinet body, and an automatic pressure relief exhaust filtering mechanism is arranged on one side of the cabinet body; and a multi-dimensional rotary telescopic fire extinguishing mechanism is arranged at the top of the cabinet body. By arranging the multi-dimensional rotating telescopic fire extinguishing mechanism, the through hole spray head forms a spiral three-dimensional spraying track, and the problems that an existing partial discharge online positioning device often has an automatic fire extinguishing function, but a spray head for spraying a fire extinguishing medium can only achieve single autorotation or fixed-direction spraying, a composite motion mechanism is lacked, and the fire extinguishing efficiency is poor are solved. A three-dimensional coverage track cannot be formed, so that corners of a cabinet body, gaps of an online monitoring device main body and a back area are easy to become fire extinguishing blind areas, and small fire is easy to remain and re-burn.

Description

Technical Field

[0001] This invention relates to the field of detection technology, specifically to an online partial discharge locating device and monitoring method for surge arresters. Background Technology

[0002] A surge arrester partial discharge online location device generally consists of a main power supply, a partial discharge monitoring unit, a remote communication unit, an ultrasonic sensor, an ultrasonic sensor power supply unit, and a broadband current transformer. The main power supply, partial discharge instrument, remote communication unit, and ultrasonic sensor power supply unit are centrally installed in the main control cabinet. The ultrasonic sensor is fixed on the side wall of the surge arrester being monitored, and the broadband current transformer is installed on the grounding lead of the surge arrester.

[0003] However, the existing devices have the following shortcomings during use: Existing partial discharge online positioning devices often have automatic fire extinguishing functions, but the nozzles that spray fire extinguishing media can only achieve single rotation or fixed-direction spraying. They lack a composite motion mechanism and cannot form a three-dimensional coverage trajectory, which makes the corners of the cabinet, the gaps of the main body of the online monitoring device, and the back area easy to become fire extinguishing blind spots, and small fires are easy to remain and reignite.

[0004] Therefore, we proposed an online partial discharge location device and monitoring method for surge arresters to solve the problems mentioned above. Summary of the Invention

[0005] The purpose of this invention is to provide an online partial discharge positioning device and monitoring method for surge arresters. A drive mechanism drives a rotating tube to revolve around the central axis of the cabinet. Simultaneously, a first spur gear on the outer surface of the fixed tube meshes with an internal gear fixed at the top of the cabinet. During the rotation of the rotating tube, the first spur gear rolls along the internal gear, causing the fixed tube, telescopic tube, and through-hole nozzle to rotate synchronously. Furthermore, a PLC controller controls the extension and retraction of two electric telescopic rods, moving the mounting plate and through-hole nozzle up and down to adjust the spraying height, thus creating a spiral three-dimensional spraying trajectory for the through-hole nozzle, thereby solving the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a partial discharge online positioning device for surge arresters, comprising a cabinet, wherein the main body of the partial discharge online positioning device is installed on the bottom inner side of the cabinet, a self-locking telescopic moving mechanism is provided at the bottom of the cabinet, an automatic pressure relief and exhaust filtration mechanism is provided on one side of the cabinet, a multi-dimensional rotating telescopic fire extinguishing mechanism is provided at the top of the cabinet, and a PLC controller is installed on the top inner side of the cabinet. The multi-dimensional rotating telescopic fire extinguishing mechanism includes a rotating tube rotatably mounted on the top of a cabinet. An internal gear is fixedly connected to the top inner side of the cabinet. A fixed tube is rotatably connected to the bottom end of the rotating tube. A first spur gear and a fixed plate are fixedly sleeved on the outer surface of the fixed tube. The first spur gear meshes with the internal gear. Two electric telescopic rods are fixedly mounted on the bottom of the fixed plate. An installation plate is fixedly connected to the telescopic ends of the two electric telescopic rods. A telescopic tube is fixedly connected to the bottom end of the fixed tube. A through-hole nozzle is installed at the bottom of the installation plate. The bottom end of the telescopic tube passes through the installation plate and communicates with the interior of the through-hole nozzle. A drive mechanism for driving the rotating tube to rotate is provided on the top of the cabinet.

[0007] Preferably, the self-locking telescopic moving mechanism includes a base fixedly connected to the bottom of the cabinet, four telescopic columns are provided in the base, four universal wheels are installed at the bottom of the four telescopic columns, four limiting grooves are opened on the inner side of the base, four limiting blocks are slidably connected in the four limiting grooves, and one side of the four limiting blocks is fixedly connected to the four telescopic columns.

[0008] Preferably, a first servo motor is fixedly installed on the inner bottom of the base, and a worm gear is fixedly connected to the output end of the first servo motor. The top end of the worm gear is rotatably connected to the base. Two rotating shafts are rotatably connected inside the base. Two worm wheels and four connecting arms are fixedly sleeved on the outer surfaces of the two rotating shafts. The two worm wheels are meshed with the worm gear, and the four connecting arms are hinged to four telescopic columns. The automatic pressure relief and exhaust filtration mechanism includes a fixed shell that penetrates and connects to one side of the cabinet.

[0009] Preferably, a fan is provided on the inner surface of the fixed shell, and a composite filter element is detachably connected to the outer surface of one end of the fixed shell.

[0010] Preferably, a pressure sensor and a toxic gas sensor are installed on the inner top of the cabinet, a protective net is bolted to one end of the fixed shell, and the drive mechanism includes a support frame fixedly connected to the top of the cabinet.

[0011] Preferably, a second servo motor is fixedly installed on the top inner side of the support frame, and a drive shaft is fixedly connected to the output end of the second servo motor. The bottom end of the drive shaft is rotatably connected to the cabinet.

[0012] Preferably, two second spur gears are fixedly sleeved on the outer surface of the drive shaft and the outer surface of the rotating tube, and the two second spur gears are meshed together.

[0013] Preferably, a smoke sensor is installed on the top inner side of the cabinet, and a dry ice canister is installed on the top of the cabinet.

[0014] Preferably, one end of the dry ice container is fixedly connected to a connecting pipe, the end of the connecting pipe away from the dry ice container is rotatably connected to a rotating pipe, and a solenoid valve is installed on the connecting pipe.

[0015] The monitoring methods for online partial discharge locating devices for surge arresters include the following methods: Step 1: During the device movement and fixing stage, the first servo motor is started to drive the worm gear to rotate. Through the meshing transmission between the worm gear and the worm wheel, the rotating shaft is driven to rotate. The connecting arm swings accordingly and pushes the telescopic column to slide down along the limiting groove. The universal wheel extends and supports the cabinet. Then, the cabinet is pushed to the target surge arrester monitoring position. After moving to the target position, the first servo motor reverses, the connecting arm pulls the telescopic column to retract upward, and the universal wheel retracts into the base. The bottom surface of the base is in contact with the ground, and the device is fixed by friction, ensuring the stability of the device during the monitoring process. Step 2: Equipment commissioning and online monitoring phase. Connect the ultrasonic sensor to the side wall of the surge arrester and the broadband current transformer to the grounding lead of the surge arrester to ensure a secure connection of the signal transmission line. Start the partial discharge online positioning device. The device uses the matching ultrasonic sensor and broadband current transformer to collect the ultrasonic signals and pulse current signals generated by partial discharge during the operation of the surge arrester in real time. After the signals are processed and analyzed by the device, the location, intensity and development trend of the partial discharge are accurately located, and the data is uploaded to the background system through the remote communication unit to achieve early warning of the fault. Step 3: Emergency Response Phase. The smoke sensor monitors whether a fire has started and smoke is rising inside the cabinet. Once the smoke concentration is detected to be too high, a signal is sent to the PLC controller. After receiving the signal, the PLC controller opens the solenoid valve, and the extinguishing medium in the dry ice tank is delivered to the through-hole nozzle through the connecting pipe, rotating pipe, fixed pipe, and telescopic pipe. At the same time, the second servo motor is started, and the second spur gear on the rotating pipe meshes with the drive shaft to drive the rotating pipe to revolve around the center of the cabinet. The first spur gear on the fixed pipe meshes with the internal gear, driving the fixed pipe to rotate during the revolution, so that the through-hole nozzle forms a spiral trajectory. The electric telescopic rod extends and retracts according to the location of the fire, driving the mounting plate and the through-hole nozzle to adjust the height up and down to cover the fire extinguishing blind spot and quickly extinguish the fire. Step 4: Pressure relief and filtration stage. The pressure sensor monitors the air pressure inside the cabinet in real time, and the toxic gas sensor continuously detects harmful gases such as SF decomposition products that may be generated by partial discharge. The data is synchronously transmitted to the PLC controller. When the air pressure exceeds the standard or the concentration of harmful gases exceeds the set threshold, the PLC controller immediately starts the fan. The high pressure or harmful gases inside the cabinet flow through the fixed shell and the composite filter element, and are discharged after filtering out toxic components and dust.

[0016] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention employs a multi-dimensional rotating and telescopic fire extinguishing mechanism. A drive mechanism propels a rotating tube to revolve around the central axis of the cabinet. Simultaneously, a first spur gear on the outer surface of the fixed tube meshes with an internal gear fixed at the top of the cabinet. During the rotation, the first spur gear rolls along the internal gear, causing the fixed tube, telescopic tube, and through-hole nozzle to rotate synchronously. Furthermore, a PLC controller controls the extension and retraction of two electric telescopic rods, moving the mounting plate and through-hole nozzle up and down to adjust the spray height. This creates a spiral, three-dimensional spray trajectory from the through-hole nozzle. This solves the problem that existing partial discharge online positioning devices often have automatic fire extinguishing capabilities, but the nozzles spraying extinguishing media can only achieve single-rotation or fixed-direction spraying, lacking a composite motion mechanism to form a three-dimensional coverage trajectory. This results in blind spots in cabinet corners, gaps in the main body of the online monitoring device, and the back area, making small fires prone to rekindling.

[0017] 2. This invention features a self-locking telescopic movement mechanism. When the device needs to be moved to different surge arrester monitoring positions, the first servo motor drives the worm gear to rotate. The worm gear meshes with two worm wheels, driving two rotating shafts to rotate synchronously. This causes the four connecting arms on the rotating shafts to swing, pushing the telescopic column downwards along the limiting groove of the base until the universal wheels are fully extended and support the cabinet. At this time, the universal wheels enable flexible transfer of the device, adapting to the multi-position monitoring needs in scenarios such as substations. When the device moves to the target position, the first servo motor reverses, the connecting arms pull the telescopic column upwards to retract, and the universal wheels retract into the base. The bottom surface of the base is completely in contact with the ground, using the friction between the base and the ground to achieve fixation. This ensures that the device will not be displaced due to external vibration or human contact during long-term monitoring, guaranteeing the detection accuracy of the partial discharge online positioning device.

[0018] 3. This invention incorporates an automatic pressure relief and filtration mechanism. A pressure sensor monitors the internal air pressure in real time, while a toxic gas sensor continuously detects harmful gases such as SF6 decomposition products that may be generated by partial discharge of the surge arrester. When the pressure inside the cabinet exceeds the standard due to fire, equipment overheating, or abnormal partial discharge, or when the concentration of toxic gas exceeds the set threshold, the PLC controller immediately starts the fan. The airflow generated by the fan introduces the high-pressure gas or harmful gas inside the cabinet into the fixed shell. After being filtered by the composite filter element, harmful components are adsorbed and dust impurities are intercepted. The gas is then discharged from the cabinet through the protective net, achieving a stable release of pressure inside the cabinet. This prevents the cabinet from being damaged by high-pressure deformation of the internal equipment and also prevents the direct emission of harmful gases, which could pollute the environment or endanger the health of maintenance personnel. Attached Figure Description

[0019] Figure 1 This is a perspective view of the main structure of the online partial discharge locating device for surge arresters of the present invention; Figure 2 This is a perspective view of the right side of the online partial discharge locating device for surge arresters of the present invention; Figure 3 This is a perspective view of the bottom structure of the online partial discharge locating device for surge arresters of the present invention; Figure 4 This is a three-dimensional view of the connecting pipe in the online partial discharge locating device for surge arresters of the present invention; Figure 5 This is a three-dimensional structural view of the cabinet in the online partial discharge positioning device for surge arresters of the present invention; Figure 6 This is a three-dimensional view of the rotating tube in the partial discharge online positioning device for the surge arrester of the present invention; Figure 7 This is a three-dimensional cross-sectional view of the base in the online partial discharge positioning device for surge arresters of the present invention; Figure 8 This is a three-dimensional view of the fixed shell structure in the online partial discharge positioning device for the surge arrester of the present invention.

[0020] In the diagram: 1. Cabinet; 2. Partial discharge online positioning device body; 3. Self-locking telescopic moving mechanism; 301. Base; 302. Telescopic column; 303. Casters; 304. Limiting groove; 305. Limiting block; 306. First servo motor; 307. Worm gear; 308. Rotating shaft; 309. Worm wheel; 310. Connecting arm; 4. Automatic pressure relief exhaust filtration mechanism; 401. Fixed shell; 402. Fan; 403. Composite filter element; 404. Pressure sensor; 405. Toxic gas sensor; 406. Protective netting 5. Multi-dimensional rotating telescopic fire extinguishing mechanism; 501. Rotating tube; 502. Internal gear; 503. Fixed tube; 504. First spur gear; 505. Fixed plate; 506. Electric telescopic rod; 507. Mounting plate; 508. Telescopic tube; 509. Through-hole nozzle; 510. Smoke sensor; 511. Dry ice container; 512. Connecting tube; 513. Solenoid valve; 6. Drive mechanism; 601. Support frame; 602. Second servo motor; 603. Drive shaft; 604. Second spur gear; 7. PLC controller. 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] like Figure 1 - Figure 8As shown, the present invention provides a technical solution: a partial discharge online positioning device for a surge arrester, including a cabinet 1, a partial discharge online positioning device body 2 installed on the bottom inner side of the cabinet 1, a self-locking telescopic moving mechanism 3 provided on the bottom of the cabinet 1, an automatic pressure relief and exhaust filtration mechanism 4 provided on one side of the cabinet 1, a multi-dimensional rotating telescopic fire extinguishing mechanism 5 provided on the top of the cabinet 1, and a PLC controller 7 installed on the top inner side of the cabinet 1. The multi-dimensional rotating telescopic fire extinguishing mechanism 5 includes a rotating tube 501 rotatably mounted on the top of the cabinet 1. An internal gear 502 is fixedly connected to the top inner side of the cabinet 1. A fixed tube 503 is rotatably connected to the bottom end of the rotating tube 501. A first straight gear 504 and a fixed plate 505 are fixedly sleeved on the outer surface of the fixed tube 503. The first straight gear 504 meshes with the internal gear 502. Two electric telescopic rods 506 are fixedly mounted on the bottom of the fixed plate 505. An installation plate 507 is fixedly connected to the telescopic ends of the two electric telescopic rods 506. A telescopic tube 508 is fixedly connected to the bottom end of the fixed tube 503. A through-hole nozzle 509 is installed at the bottom of the installation plate 507. The bottom end of the telescopic tube 508 passes through the installation plate 507 and communicates with the interior of the through-hole nozzle 509. A drive mechanism 6 for driving the rotating tube 501 to rotate is provided on the top of the cabinet 1.

[0023] like Figure 1 and Figure 7 As shown, the self-locking telescopic moving mechanism 3 includes a base 301 fixedly connected to the bottom of the cabinet 1. Four telescopic columns 302 are installed inside the base 301, and four casters 303 are installed at the bottom of the four telescopic columns 302. Four limiting grooves 304 are opened on the inner side of the base 301, and four limiting blocks 305 are slidably connected within the four limiting grooves 304. One side of each limiting block 305 is fixedly connected to one of the four telescopic columns 302. The base 301 provides a stable bearing foundation for the entire moving mechanism. The four telescopic columns 302 and the casters 303... The one-to-one correspondence setting enables flexible movement of the device in multiple directions, adapting to the multi-position monitoring needs in scenarios such as substations. At the same time, all four universal wheels 303 are polyurethane directional rubber-coated wheels, which provide sufficient friction to prevent slippage when supported. The sliding cooperation between the limiting groove 304 and the limiting block 305 guides and limits the up and down movement of the telescopic column 302, preventing the telescopic column 302 from deviating or tilting during movement, ensuring the verticality of the universal wheels 303 when extended or retracted, and avoiding device movement jamming or unstable fixation due to uneven force.

[0024] like Figure 1 , Figure 7 and Figure 8As shown, a first servo motor 306 is fixedly installed on the inner bottom of the base 301. A worm gear 307 is fixedly connected to the output end of the first servo motor 306. The top end of the worm gear 307 is rotatably connected to the base 301. Two rotating shafts 308 are rotatably connected inside the base 301. Two worm wheels 309 and four connecting arms 310 are fixedly sleeved on the outer surface of the two rotating shafts 308. The two worm wheels 309 are meshed with the worm gear 307. The four connecting arms 310 are hinged to four telescopic columns 302. The automatic pressure relief and exhaust filter mechanism 4 includes a fixed shell 401 that penetrates and connects to one side of the cabinet 1. The first servo motor 306 is connected to the two worm wheels 309 through the meshing of the worm gear 307. The transmission drives the rotating shaft 308 to rotate synchronously, which in turn drives the four connecting arms 310 to link the telescopic columns 302, realizing the automatic extension and retraction of the casters 303. The worm gear 307 and worm wheel 309 transmission have the characteristics of precise transmission ratio and reverse self-locking, ensuring that the telescopic columns 302 will not slide on their own after being fixed, thus improving the stability of the device after installation. The synchronous movement of the four connecting arms 310 ensures that the four telescopic columns 302 rise and fall in unison, preventing the device from tilting. The motor drive replaces manual operation, reducing labor intensity, and has high transmission efficiency and low noise. It realizes convenient switching between moving and fixed functions, ensuring the positional stability of the device during partial discharge monitoring and avoiding displacement from affecting detection accuracy.

[0025] like Figure 1 and Figure 8 As shown, a fan 402 is installed on the inner surface of the fixed housing 401, and a composite filter element 403 is detachably connected to the outer surface of one end of the fixed housing 401. The fixed housing 401 provides integrated installation space for the fan 402 and the composite filter element 403, resulting in a compact structure and strong protection. The fan 402 serves as an active exhaust power source, which can quickly discharge high-pressure gas or harmful gas from the cabinet 1, achieving efficient pressure relief. The composite filter element 403 adopts a composite structure of activated carbon and HEPA, which can effectively filter toxic components and dust impurities in the gas, preventing harmful gases from polluting the environment or harming the health of maintenance personnel, while preventing dust from entering the cabinet 1 and affecting equipment operation. The composite filter element 403 adopts a detachable design, which facilitates regular replacement and maintenance, ensures long-term stable filtration effect, and extends the service life of the automatic pressure relief exhaust filter mechanism 4.

[0026] like Figure 1 , Figure 2 , Figure 6 and Figure 8As shown, a pressure sensor 404 and a toxic gas sensor 405 are installed on the top inner side of the cabinet 1. A protective net 406 is bolted to one end of the fixed shell 401. The drive mechanism 6 includes a support frame 601 fixedly connected to the top of the cabinet 1. The pressure sensor 404 monitors the air pressure inside the cabinet 1 in real time, and the toxic gas sensor 405 accurately detects harmful gases such as SF6 decomposition products that may be generated by the partial discharge of the surge arrester. The two work together with the PLC controller 7 to achieve precise triggering of pressure relief and exhaust, avoiding safety hazards caused by excessive pressure leading to deformation of the cabinet 1 or excessive concentration of harmful gases. The protective net 406 is fixed to the end of the fixed shell 401 by bolts, which plays a protective role.

[0027] like Figure 1 , Figure 4 and Figure 6 As shown, a second servo motor 602 is fixedly installed on the top inner side of the support frame 601. The output end of the second servo motor 602 is fixedly connected to a drive shaft 603. The bottom end of the drive shaft 603 is rotatably connected to the cabinet 1. The support frame 601 provides a stable installation support for the second servo motor 602, ensuring the stability of the motor during operation. The motor drive method realizes the automatic rotation of the rotating tube 501, and the speed is adjustable. The spraying speed can be adjusted according to the fire range to improve the targeting of fire extinguishing.

[0028] like Figure 4 and Figure 6 As shown, two second spur gears 604 are fixedly sleeved on the outer surface of the drive shaft 603 and the outer surface of the rotating tube 501. The two second spur gears 604 are meshed and connected. The meshing transmission method of the two second spur gears 604 can accurately and smoothly transmit the power of the second servo motor 602 to the rotating tube 501, ensuring that the rotation speed of the rotating tube 501 is uniform.

[0029] like Figure 1 , Figure 5 and Figure 6 As shown, a smoke sensor 510 is installed on the top inner side of cabinet 1, and a dry ice canister 511 is installed on the top of cabinet 1. The smoke sensor 510, installed on the top of cabinet 1, can quickly capture the smoke signal in the early stage of a fire inside cabinet 1 and promptly feed it back to PLC controller 7 to trigger the action of multi-dimensional rotating telescopic fire extinguishing mechanism 5, so as to realize the early disposal of fire and reduce fire losses. The dry ice canister 511 serves as a fire extinguishing medium storage container. The dry ice stored in it has the characteristics of high fire extinguishing efficiency, no pollution, non-conductivity, and no residue. After the fire is extinguished, it will not cause corrosion or short circuit damage to the particulate discharge online positioning device body 2 or the internal circuit of cabinet 1, ensuring the normal operation of the equipment after the fire is extinguished. At the same time, the dry ice sublimation absorbs heat and can quickly cool down, further suppressing the spread of fire.

[0030] like Figure 4 and Figure 6As shown, one end of the dry ice canister 511 is fixedly connected to a connecting pipe 512. The end of the connecting pipe 512 away from the dry ice canister 511 is rotatably connected to a rotating pipe 501. A solenoid valve 513 is installed on the connecting pipe 512. The connection between the dry ice canister 511 and the rotating pipe 501 is achieved through the connecting pipe 512, providing a stable delivery channel for the extinguishing medium. The rotatable connection design between the connecting pipe 512 and the rotating pipe 501 is adapted to the revolution and rotation of the rotating pipe 501, avoiding pipe entanglement and twisting that could interrupt the delivery of the medium and ensuring the continuity of the extinguishing process. The solenoid valve 513 is installed on the connecting pipe 512 and is precisely controlled by the PLC controller 7. It can flexibly adjust the release timing and amount of the extinguishing medium according to the fire situation, avoiding unnecessary waste of the medium.

[0031] The usage and working principle of this device: During the moving and fixing phase, the first servo motor 306 is started to drive the worm gear 307 to rotate. Through the meshing transmission between the worm gear 307 and the worm wheel 309, the rotating shaft 308 is rotated. The connecting arm 310 swings accordingly and pushes the telescopic column 302 to slide downward along the limiting groove 304. The universal wheel 303 extends and supports the cabinet 1. Then, the cabinet 1 is pushed to the target surge arrester monitoring position. After moving to the target position, the first servo motor 306 reverses, the connecting arm 310 pulls the telescopic column 302 upward to retract, and the universal wheel 303 retracts into the base 301. The bottom surface of the base 301 is in contact with the ground, and the device is fixed by friction, ensuring the stability of the device during the monitoring process. During the equipment commissioning and online monitoring phase, connect the ultrasonic sensor to the side wall of the surge arrester and the broadband current transformer to the grounding lead of the surge arrester to ensure a secure connection of the signal transmission line. Start the partial discharge online positioning device body 2. The partial discharge online positioning device body 2 uses the matching ultrasonic sensor (installed on the side wall of the surge arrester) and broadband current transformer (installed on the grounding lead of the surge arrester) to collect the ultrasonic signals and pulse current signals generated by partial discharge during the operation of the surge arrester in real time. After the signals are processed and analyzed by the device body, the location, intensity and development trend of partial discharge are accurately located, and the data is uploaded to the background system through the remote communication unit to realize early warning of faults. During the emergency response phase, the smoke sensor 510 monitors whether a fire has occurred inside the cabinet 1 and produces smoke. Once the smoke concentration is detected to be too high, a signal is sent to the PLC controller 7. Upon receiving the signal, the PLC controller 7 opens the solenoid valve 513. The extinguishing medium in the dry ice canister 511 is then transported to the through-hole nozzle 509 via the connecting pipe 512, rotating pipe 501, fixed pipe 503, and telescopic pipe 508. Simultaneously, the second servo motor 602 is activated. Through the drive shaft 603, the second spur gear 604 on the rotating pipe 501 meshes with the drive shaft 603, causing the rotating pipe 501 to revolve around the center of the cabinet 1. The first spur gear 504 on the fixed pipe 503 meshes with the internal gear 502, driving the fixed pipe 503 to rotate during the revolution, causing the through-hole nozzle 509 to form a spiral trajectory. The electric telescopic rod 506 extends and retracts according to the location of the fire, driving the mounting plate 507 and the through-hole nozzle 509 to adjust their height up and down, covering the fire extinguishing blind spot and quickly extinguishing the fire. During the pressure relief and filtration stage, pressure sensor 404 monitors the air pressure inside cabinet 1 in real time, and toxic gas sensor 405 continuously detects harmful gases such as SF6 decomposition products that may be generated by partial discharge. The data is synchronously transmitted to PLC controller 7. When the air pressure exceeds the standard (such as due to equipment overheating or fire) or the concentration of harmful gases exceeds the set threshold, PLC controller 7 immediately starts fan 402. High pressure or harmful gases inside cabinet 1 flow through fixed shell 401 and composite filter element 403, and are discharged after filtering toxic components and dust.

[0032] The wiring diagrams for the partial discharge online positioning device body 2, the first servo motor 306, the fan 402, the pressure sensor 404, the toxic gas sensor 405, the electric telescopic rod 506, the smoke sensor 510, the solenoid valve 513, the second servo motor 602, and the PLC controller 7 in this invention are common knowledge in the field. Their working principles are well-known technologies, and the appropriate models are selected according to actual use. Therefore, the control methods and wiring arrangements for the partial discharge online positioning device body 2, the first servo motor 306, the fan 402, the pressure sensor 404, the toxic gas sensor 405, the electric telescopic rod 506, the smoke sensor 510, the solenoid valve 513, the second servo motor 602, and the PLC controller 7 will not be explained in detail.

[0033] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. Partial discharge on-line positioning device for surge arresters, characterized in that, The utility model relates to a cabinet (1), the inside bottom of cabinet (1) is equipped with partial discharge online positioning device body (2), the bottom of cabinet (1) is provided with self -locking telescopic movement mechanism (3), one side of cabinet (1) is provided with automatic pressure relief exhaust filter mechanism (4), the top of cabinet (1) is provided with multi -dimensional rotary telescopic fire extinguishing mechanism (5), the inside top of cabinet (1) is installed with PLC controller (7), The multi -dimensional rotary telescopic fire extinguishing mechanism (5) includes the rotary pipe (501) of rotary installation in the top of cabinet (1), the inside top of cabinet (1) is fixedly connected with internal gear (502), the bottom of rotary pipe (501) is rotatably connected with fixed pipe (503), the outer surface of fixed pipe (503) is fixedly sleeved with first straight gear (504) and fixed plate (505), first straight gear (504) is meshed with internal gear (502), the bottom of fixed plate (505) is fixedly installed with two electric telescopic rods (506), the telescopic end of two electric telescopic rods (506) is fixedly connected with mounting plate (507), the bottom of fixed pipe (503) is fixedly connected with telescopic pipe (508), the bottom of mounting plate (507) is installed with through -hole nozzle (509), the bottom of telescopic pipe (508) penetrates mounting plate (507) and is connected with the inside of through -hole nozzle (509), the top of cabinet (1) is provided with drive mechanism (6) for driving rotary pipe (501) rotation.

2. The partial discharge on-line locating device for surge arresters according to claim 1, characterized in that: The self -locking telescopic movement mechanism (3) includes the base (301) of fixed connection in the bottom of cabinet (1), the inside of base (301) is provided with four telescopic columns (302), the bottom of four telescopic columns (302) is installed with four universal wheels (303), the inside of base (301) is provided with four limit grooves (304), four limit grooves (304) are slidably connected with four limit blocks (305), and one side of four limit blocks (305) is fixedly connected with four telescopic columns (302).

3. The partial discharge on-line locating device for surge arresters according to claim 2, characterized in that: The inside bottom of base (301) is fixedly installed with first servo motor (306), the output of first servo motor (306) is fixedly connected with worm (307), the top of worm (307) is rotatably connected with base (301), two rotating shafts (308) are rotatably connected in base (301), the outer surface of two rotating shafts (308) is fixedly sleeved with two worm gears (309) and four connecting arms (310), two worm gears (309) are meshed with worm (307), four connecting arms (310) are hinged with four telescopic columns (302), the automatic pressure relief exhaust filter mechanism (4) includes the fixed shell (401) of through connection in one side of cabinet (1).

4. The partial discharge on-line locating device for surge arresters according to claim 3, characterized in that: The inner surface of fixed shell (401) is provided with fan (402), one end outer surface of fixed shell (401) is detachably connected with composite filter element (403).

5. The partial discharge on-line locating device for surge arresters according to claim 4, characterized in that: The inner side top of the cabinet body (1) is provided with a pressure sensor (404) and a toxic gas sensor (405), one end of the fixed shell (401) is bolted with a protective net (406), and the driving mechanism (6) comprises a support frame (601) fixedly connected to the top of the cabinet body (1).

6. The partial discharge on-line locating device for surge arresters according to claim 5, characterized in that: A second servo motor (602) is fixedly installed on the inner side top of the support frame (601), and the output end of the second servo motor (602) is fixedly connected with a driving shaft (603), and the bottom end of the driving shaft (603) is rotatably connected with the cabinet body (1).

7. The partial discharge on-line locating device for surge arresters according to claim 6, characterized in that: Two second spur gears (604) are fixedly sleeved on the outer surfaces of the driving shaft (603) and the rotating pipe (501), and the two second spur gears (604) are meshedly connected.

8. The partial discharge on-line locating device for surge arresters according to claim 7, characterized in that: A smoke sensor (510) is installed on the inner side top of the cabinet body (1), and a dry ice tank (511) is installed on the top of the cabinet body (1).

9. The partial discharge on-line locating device for surge arresters according to claim 8, characterized in that: One end of the dry ice tank (511) is fixedly communicated with a connecting pipe (512), the other end of the connecting pipe (512) is rotatably connected with the rotating pipe (501), and the connecting pipe (512) is provided with an electromagnetic valve (513).

10. A method of monitoring a partial discharge on-line positioning device of a surge arrester, characterized in that: The lightning arrester partial discharge online positioning device of claim 9 is used, comprising the following steps: S1: device moving and fixing stage, start the first servo motor (306) to drive the worm (307) to rotate, drive the rotating shaft (308) to rotate through the meshing transmission of the worm (307) and the worm gear (309), the connecting arm (310) swings and pushes the telescopic column (302) to slide downward along the limiting groove (304), the universal wheel (303) extends and supports the cabinet body (1), then pushes the cabinet body (1) to the target lightning arrester monitoring position, after moving to the target position, reverses the first servo motor (306), the connecting arm (310) pulls the telescopic column (302) to shrink upward, the universal wheel (303) is withdrawn into the base (301), the bottom surface of the base (301) is attached to the ground, and the friction force is used to realize fixing, and the stability of the device in the monitoring process is ensured; S2: equipment debugging and online monitoring stage, connect the ultrasonic sensor with the side wall of the lightning arrester and the wideband current transformer with the grounding down lead of the lightning arrester, ensure that the signal transmission line connection is firm, start the partial discharge online positioning device body (2), the partial discharge online positioning device body (2) collects the ultrasonic signal and pulse current signal generated by the partial discharge in the operation process of the lightning arrester in real time through the matched ultrasonic sensor and wideband current transformer, the signal is processed and analyzed after the device body, the partial discharge position, strength and development trend are accurately positioned, and the signal is uploaded to the background system through the remote communication unit, and early warning of the fault is realized. S3: emergency treatment stage, smoke sensor (510) monitor whether the internal cabinet (1) occurs fire smoke condition, once the monitoring of smoke concentration is too high will signal to the PLC controller (7), PLC controller (7) receives the signal, open solenoid valve (513), dry ice tank (511) of fire extinguishing medium through the connecting pipe (512), rotating pipe (501), fixed pipe (503), flexible pipe (508) to the through hole nozzle (509), while starting the second servo motor (602), through the drive shaft (603) and rotating pipe (501) on the second spur gear (604) meshing transmission, rotating pipe (501) around the center of the cabinet (1) revolution, fixed pipe (503) on the first spur gear (504) and the internal gear (502) meshing, in the process of revolution drive fixed pipe (503) rotation, make through hole nozzle (509) form spiral trajectory, electric telescopic rod (506) according to the fire position telescopic, drive mounting plate (507) and through hole nozzle (509) up and down adjustment height, cover blind area, quickly put out the fire; S4: pressure relief exhaust filter stage, pressure sensor (404) real-time monitoring of the cabinet (1) gas pressure, toxic gas sensor (405) continuously detect harmful gas may be generated by partial discharge, data synchronization transmission to PLC controller (7), when the gas pressure or harmful gas concentration exceeds the set threshold, PLC controller (7) immediately start the fan (402), cabinet (1) in high pressure or harmful gas through the fixed shell (401) flow through the composite filter (403), filter toxic components and dust after discharge.

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