Special tool for isolating heating and cooling under 110kV of transformer substation without power outage

Abstract

The utility model relates to the technical field of electric power equipment maintenance, and discloses a special tool for isolating heat and cooling under 110kV of a transformer substation without power outage, which comprises an insulating operating rod, an ultrasonic descaling device, a dry ice spraying device, a dry ice supply system, a monitoring device and a control circuit, the control circuit comprises a power supply module, a main control unit, an ultrasonic drive circuit, a dry ice spraying control circuit, a sensor interface, a human-computer interaction interface and a communication module. Compared with the prior art, the utility model has the advantages that the ultrasonic wave and dry ice jet synergistically act to safely and efficiently remove the oxide layer of the contact of the disconnecting switch, reduce the contact resistance, reduce the heating and achieve the purpose of cooling under the condition of no power failure.

Description

Technical Field

[0001] The utility model relates to the technical field of power equipment maintenance, in particular to a special tool for isolating heating and cooling without power outage in transformer substations below 110kV. Background Art

[0002] In power systems, disconnectors are critical high-voltage equipment. They are switching devices primarily used for "isolating power sources, switching operations, and connecting and disconnecting low-current circuits" without arc extinguishing capabilities. When in the open position, the disconnector's contacts have specified insulation distances and a clear disconnection mark. In the closed position, they can carry the current under normal circuit conditions and the current under abnormal conditions (such as a short circuit) for a specified time. Disconnectors are generally used as high-voltage disconnectors, with rated voltages above 1kV. Their operating principles and structures are relatively simple, but due to their high usage and demanding reliability, they significantly impact the design, construction, and safe operation of substations and power plants. A key characteristic of disconnectors is their lack of arc extinguishing capability, meaning they can only open and close circuits without load current.

[0003] The contact surface of the disconnector is prone to oxidation due to the combined effects of the contact material and the external environment. Although pure silver contacts have good conductivity, they are soft and easily oxidized, causing the contact surface to turn black and affecting conductivity.

[0004] The main reasons for oxidation of the isolating switch contacts include the following aspects:

[0005] The contact surface is too small: The contact surface between the moving contact blade and the static contact is too small. The current is concentrated and then dispersed, resulting in a decrease in spring pressure, oxidation of the contact surface, an increase in contact resistance, and a large amount of heat generation.

[0006] Arc burns: The arc generated when opening and closing the switch burns the contact surface of the moving and static contacts, or improper force is used when closing the switch, resulting in reduced contact pressure, poor contact, and heat generation.

[0007] Overload operation: Long-term overload operation will cause the contact surface temperature to be too high, resulting in oxidation of the contact surface, increasing contact resistance and further increasing heat generation.

[0008] Improper operation: When operating the disconnector, the speed is too slow or the operating force is too large, resulting in excessive arc burning between the moving and static contacts and oxidation of the contact surface.

[0009] In order to solve the problem of oxidation of the isolating switch contacts, the following measures can be taken:

[0010] Clean the oxide layer: Check the contacts of the disconnector regularly, remove the oxide layer on the surface, increase the contact area, and apply conductive paste on the contact surface to prevent further oxidation.

[0011] Adjust the contact surface: Ensure that the contact surface between the moving contact blade and the static contact is large enough, adjust the length of the cross link, and ensure that the depth of the moving contact blade inserted into the static contact is not less than 90% of the blade width.

[0012] Use appropriate materials: Silver-nickel alloy is selected as the contact material because of its good conductivity and hardness, and is not easily oxidized and rusted.

[0013] Control the load: Avoid long-term overload operation of the disconnector and adjust the load in time to ensure that it operates within the rated range.

[0014] Standardized operation: Standardize the operating procedures of the disconnector to ensure moderate operating speed and appropriate force to avoid arc burns and contact surface damage caused by improper operation.

[0015] Through the above measures, the occurrence of oxidation of the isolating switch contacts can be effectively reduced, the service life of the equipment can be extended, and the safety and stability of the system can be improved.

[0016] Oxidation forms on the contact surfaces of disconnectors, forming an oxide layer. This layer increases contact resistance and causes heating. If not addressed promptly, it can lead to equipment failure or even a safety incident. Traditional maintenance methods often require power outages to clean or replace the contacts, which not only affects power continuity but also causes financial losses.

[0017] At the same time, existing maintenance methods cannot clean the contacts thoroughly and effectively, and cannot ensure the subsequent normal operation of the contacts.

[0018] Therefore, it is of great practical significance to develop a special tool that can safely and efficiently remove the contact oxide layer without power outage. Summary of the Invention

[0019] The technical problem to be solved by the utility model is that existing tools cannot effectively remove the contact oxide layer, and a special tool for isolating heating and cooling without power outage in substations below 110kV is provided.

[0020] To solve the above technical problems, the utility model provides a technical solution: a special tool for isolating heating and cooling without power outage in substations below 110kV, including an insulating operating rod, an ultrasonic descaling device, a dry ice blasting device, a dry ice supply system, a monitoring device and a control circuit;

[0021] The front end of the insulating operating rod is provided with an ultrasonic descaling device, which is integrated with a dry ice blasting device, and the dry ice blasting device is connected to the dry ice supply system. The insulating monitoring rod is provided with a monitoring device, which monitors the temperature and resistance value of the contact in real time. The control circuit is located in the control box;

[0022] The ultrasonic descaling device includes an ultrasonic generator and an ultrasonic probe, the ultrasonic descaling device includes a dry ice nozzle and an injection control valve, the dry ice supply system includes a dry ice storage tank, a compressed air source and a pressure-resistant hose, and the monitoring device infrared thermometer and contact resistance tester are used to monitor the temperature and resistance value of the contacts in real time and transmit the data to the control circuit through a wireless transmission module.

[0023] Furthermore, the control circuit includes a power supply module, a main control unit, an ultrasonic drive circuit, a dry ice blasting control circuit, a sensor interface, a human-computer interaction interface, and a communication module.

[0024] Furthermore, a compressed gas source provides power to transport the dry ice particles to the dry ice nozzle through the hose.

[0025] Furthermore, the length of the insulating operating rod is 2-5 meters.

[0026] Furthermore, the insulating operating rod is made of high-strength insulating material.

[0027] Furthermore, the high-strength insulating material is epoxy resin fiber.

[0028] Furthermore, the main control unit includes a main control chip U6, a crystal oscillator X1 and a voltage stabilizing circuit. The main control chip U6 is electrically connected to a power module, an ultrasonic drive circuit, a dry ice blasting control circuit, a sensor interface, a human-computer interaction interface, and a communication module.

[0029] A resistor R34 is connected between pins 5 and 6 of the main control chip U6, a crystal oscillator X1 is connected in parallel to the resistor R34, and capacitors C37 and C40 at both ends of the crystal oscillator X1 are grounded;

[0030] The voltage stabilizing circuit includes capacitors C56, C57, C58, C59, and C60, which are connected in parallel, and two ends of C56 are connected to a 3.3V power supply and ground respectively;

[0031] Pin 7 of the main control chip U6 is connected to a 3.3V power supply and ground via a resistor R38 and a capacitor C54 respectively.

[0032] Furthermore, the power module includes chips U15 and U16, pin 1 of the chip U15 is grounded, pin 2 of the chip U15 is connected to a 12V power supply, and a capacitor C50 is connected between pins 3 and 5 of the chip U15, with both ends of the capacitor C50 being grounded and a 5V power supply respectively;

[0033] A capacitor C51 is provided between pins 1 and 4 of the chip U16, and both ends of the capacitor C51 are connected to the ground and a 3.3V power supply respectively. Pins 2 and 4 of the chip U16 are connected, and pin 3 of the chip U16 is connected to a 5V power supply.

[0034] Furthermore, the ultrasonic drive circuit includes ultrasonic probes M1, M2, M3, M4 and a capacitor C6. Capacitors C7 and C8 are connected in parallel to the capacitor C6. A resistor R16 is connected in parallel to the capacitor C6. The two ends of the resistor R16 are connected to the ultrasonic probes M1 and M3 respectively through MOS transistors Q1 and Q5. The two ends of the capacitor C7 are connected to the ultrasonic probes M1 and M3 respectively through MOS transistors Q4 and Q8. The resistor R3 and capacitor C1 are connected in parallel to the MOS transistor Q1. The resistor R22 and capacitor C13 are connected in parallel to the MOS transistor Q5. The resistor R5 and capacitor C2 are connected in parallel to the MOS transistor Q4. The resistor R25 and capacitor C14 are connected in parallel to the MOS transistor Q8. The MOS transistors Q1 and Q5 are connected, and the MOS transistors Q4 and Q8 are connected.

[0035] Furthermore, the dry ice blasting control circuit includes a transistor Q9, the base of the transistor Q9 is connected to pin 37 of the main control chip U6 through a resistor R39, and the collector of the transistor Q9 is connected to a 12V power supply through a diode D1.

[0036] The advantages of this utility model compared with the prior art are:

[0037] High safety: High-strength insulation materials and multiple safety protection measures are used to ensure the safety of operators in high-voltage environments.

[0038] High efficiency: The oxide layer on the contacts can be removed without power outage, ensuring the continuity of power supply.

[0039] Significant results: The combination of ultrasonic waves and dry ice blasting can completely remove the contact oxide layer, reduce contact resistance and reduce heat generation.

[0040] Intelligent control: Equipped with advanced control circuit, it can monitor and adjust working parameters in real time to optimize processing effects.

[0041] Easy to operate: The equipment has a compact structure, high integration, and is easy to carry and operate.

[0042] Real-time monitoring: Equipped with temperature and resistance monitoring devices, it can grasp the treatment effect in real time and ensure the reliable operation of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 This is the circuit principle diagram of the main control chip of this utility model.

[0044] Figure 2 This is a power drive circuit diagram of the ultrasonic transducer of the utility model.

[0045] Figure 3 This is the control principle diagram of the dry ice jet motor of the utility model.

[0046] Figure 4 This is a temperature measurement and human-machine interface circuit diagram of the utility model.

[0047] Figure 5 This is a power supply circuit diagram of the utility model.

[0048] Figure 6 It is a structural diagram of this utility model. DETAILED DESCRIPTION

[0049] In the description of the present invention, it should be understood that the terms "center", "lateral", "up", "down", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more. In addition, the term "including" and any variations thereof are intended to cover non-exclusive inclusions.

[0050] The present invention will be described in further detail below with reference to the accompanying drawings. Example 1

[0051] Combined with attachment Figure 6 , special tools for isolating heating and cooling without power outage in substations below 110kV, including an insulating operating rod 1, an ultrasonic descaling device 2, a dry ice blasting device 3, a dry ice supply system, a monitoring device and a control circuit;

[0052] The front end of the insulating operating rod 1 is provided with an ultrasonic descaling device 2, and the ultrasonic descaling device 2 is integrated with a dry ice blasting device 3, and the dry ice blasting device 3 is connected to the dry ice supply system. The insulating monitoring rod is provided with a monitoring device, and the monitoring device monitors the temperature and resistance value of the contact in real time. The control circuit is located in the control box;

[0053] The ultrasonic descaling device 2 includes an ultrasonic generator and an ultrasonic probe, the ultrasonic descaling device 2 includes a dry ice nozzle and an injection control valve, the dry ice supply system includes a dry ice storage tank 4, a compressed air source 5 and a pressure-resistant hose, and the monitoring device infrared thermometer and contact resistance tester are used to monitor the temperature and resistance value of the contact in real time, and transmit the data to the control circuit via the AB433L PLC dedicated wireless Ethernet series;

[0054] The compressed air source 5 provides power to transport the dry ice particles to the dry ice nozzle through the hose;

[0055] The length of the insulating operating rod 1 is 3 meters;

[0056] The high-strength insulating material is epoxy resin fiber.

[0057] Insulated operating rod 1: 3 meters in length, made of epoxy resin fiber or other high-strength insulating materials, with excellent mechanical strength and electrical insulation properties.

[0058] Ultrasonic descaling device 2: fixed to the front end of the insulating operating rod 1, including an ultrasonic generator and an ultrasonic probe. The ultrasonic probe can emit high-frequency vibrations, which produce tiny impacts and vibrations on the oxide layer on the contact surface, causing it to peel off.

[0059] Dry ice blasting device 3: Integrated with ultrasonic descaling device 2, it includes a dry ice nozzle and a blast control valve. The dry ice nozzle blasts dry ice particles at high speed onto the contact surface, utilizing the low temperature and impact force of the dry ice to remove residual oxides and provide a cooling effect.

[0060] The dry ice supply system includes a dry ice storage tank 4, a compressed air source 5, and a pressure-resistant hose. The compressed air source 5 provides power to transport dry ice particles through the hose to the dry ice nozzle.

[0061] Monitoring device: an infrared thermometer and a contact resistance tester installed on the insulating operating rod 1, used to monitor the temperature and resistance value of the contacts in real time, and transmit the data to the monitoring terminal through the wireless transmission module.

[0062] Control circuit: Located in the control box of the equipment, it is used to coordinate the work of the ultrasonic descaling device 2, the dry ice blasting device 3 and the monitoring device to achieve automatic control and safety protection.

[0063] Combined with attachment Figure 1-5, the control circuit includes a power module, a main control unit, an ultrasonic drive circuit, a dry ice blasting control circuit, a sensor interface, a human-computer interaction interface, and a communication module;

[0064] The main control unit includes a main control chip U6, a crystal oscillator X1 and a voltage stabilizing circuit. The main control chip U6 is electrically connected to the power module, ultrasonic drive circuit, dry ice blasting control circuit, sensor interface, human-computer interaction interface and communication module.

[0065] A resistor R34 is connected between pins 5 and 6 of the main control chip U6, a crystal oscillator X1 is connected in parallel to the resistor R34, and capacitors C37 and C40 at both ends of the crystal oscillator X1 are grounded;

[0066] The voltage stabilizing circuit includes capacitors C56, C57, C58, C59, and C60, which are connected in parallel, and two ends of C56 are connected to a 3.3V power supply and ground respectively;

[0067] Pin 7 of the main control chip U6 is connected to a 3.3V power supply and ground via a resistor R38 and a capacitor C54 respectively;

[0068] The power module includes chips U15 and U16, pin 1 of the chip U15 is grounded, pin 2 of the chip U15 is connected to a 12V power supply, and a capacitor C50 is connected between pins 3 and 5 of the chip U15, with both ends of the capacitor C50 being grounded and connected to a 5V power supply respectively;

[0069] A capacitor C51 is connected between pins 1 and 4 of the chip U16, with both ends of the capacitor C51 connected to the ground and a 3.3V power supply respectively, pins 2 and 4 of the chip U16 are connected, and pin 3 of the chip U16 is connected to a 5V power supply;

[0070] The ultrasonic drive circuit includes ultrasonic probes M1, M2, M3, M4 and a capacitor C6. Capacitors C7 and C8 are connected in parallel to the capacitor C6. A resistor R16 is connected in parallel to the capacitor C6. Both ends of the resistor R16 are connected to the ultrasonic probes M1 and M3 via MOS transistors Q1 and Q5, respectively. Both ends of the capacitor C7 are connected to the ultrasonic probes M1 and M3 via MOS transistors Q4 and Q8, respectively. The resistor R3 and capacitor C1 are connected in parallel to the MOS transistor Q1. The resistor R22 and capacitor C13 are connected in parallel to the MOS transistor Q5. The resistor R5 and capacitor C2 are connected in parallel to the MOS transistor Q4. The resistor R25 and capacitor C14 are connected in parallel to the MOS transistor Q8. The MOS transistors Q1 and Q5 are connected, and the MOS transistors Q4 and Q8 are connected.

[0071] The dry ice blasting control circuit includes a transistor Q9, the base of which is connected to pin 37 of the main control chip U6 via a resistor R39, and the collector of which is connected to a 12V power supply via a diode D1.

[0072] The control circuit mainly consists of the following parts:

[0073] Power module: Provides stable DC power to meet the voltage and current requirements of each functional module, and has overvoltage, overcurrent, and short-circuit protection functions.

[0074] Main control unit (MCU): As the core controller, it adopts a high-performance microcontroller and is responsible for coordinating ultrasonic drive, dry ice blasting and data processing.

[0075] Ultrasonic drive circuit: According to the instructions of the main control unit, it generates ultrasonic signals of specific frequency and power to drive the ultrasonic probe to work.

[0076] Dry ice blasting control circuit: controls the start and stop of the dry ice blasting device 3, adjusts the blasting intensity, and ensures the blasting effect of the dry ice particles.

[0077] Sensor interface: Connect to infrared thermometer and contact resistance tester to collect temperature and resistance data in real time.

[0078] Human-machine interaction interface: includes display screen and control buttons for parameter setting and status display for operators to view and adjust.

[0079] Communication module: supports wireless communication, realizes remote transmission of monitoring data, and facilitates remote monitoring and data recording.

[0080] How it works

[0081] System initialization: After power-on, the main control unit initializes each module and enters the standby state.

[0082] Parameter setting: Through the human-machine interface, the operator sets the working parameters such as ultrasonic frequency, power and dry ice blasting intensity.

[0083] Start operation: After receiving the start command, the main control unit starts the ultrasonic drive circuit and the dry ice blasting control circuit in sequence.

[0084] Real-time monitoring and adjustment: The sensor interface collects temperature and resistance data in real time. The main control unit dynamically adjusts the ultrasonic and dry ice blasting parameters based on the data analysis results to optimize the removal effect.

[0085] Data transmission: Monitoring data is transmitted to the monitoring terminal through the communication module for remote monitoring and recording.

[0086] Stop operation: After the task is completed, the main control unit shuts down each functional module in turn and the system returns to standby state.

[0087] How to use

[0088] Operation preparation: The operator holds the insulating operating rod 1 at a safe distance and aims the ultrasonic probe and dry ice nozzle at the overheated isolating switch contacts.

[0089] Parameter setting: Set the ultrasonic frequency, power, dry ice blasting intensity and other working parameters through the human-computer interaction interface to ensure that it can adapt to different degrees of oxidation layer.

[0090] Start the equipment: Start the control circuit, and the system starts the ultrasonic descaling device 2 and the dry ice blasting device 3 in sequence according to the preset program.

[0091] Real-time monitoring: The infrared thermometer and contact resistance tester of the monitoring device monitor the temperature and resistance changes of the contacts in real time.

[0092] Automatic adjustment: The main control unit of the control circuit dynamically adjusts the working parameters of ultrasonic and dry ice blasting according to the monitoring data to ensure that the oxide layer is removed efficiently.

[0093] Processing completed: When the monitoring data reaches the preset safety range, the system automatically stops working and prompts the operator that the processing is completed.

[0094] Retract the equipment: Turn off the power supply of the equipment and retract the insulating operating rod 1 and other auxiliary equipment.

[0095] The tool uses a combination of ultrasonic descaling and dry ice cleaning to quickly and safely remove the oxide layer on the contacts without affecting power supply, thereby reducing contact resistance and heat generation, thereby achieving the purpose of cooling. Example 2

[0096] Combined with attachment Figure 6 , special tools for isolating heating and cooling without power outage in substations below 110kV, including an insulating operating rod 1, an ultrasonic descaling device 2, a dry ice blasting device 3, a dry ice supply system, a monitoring device and a control circuit;

[0097] The front end of the insulating operating rod 1 is provided with an ultrasonic descaling device 2, and the ultrasonic descaling device 2 is integrated with a dry ice blasting device 3, and the dry ice blasting device 3 is connected to the dry ice supply system. The insulating monitoring rod is provided with a monitoring device, and the monitoring device monitors the temperature and resistance value of the contact in real time. The control circuit is located in the control box;

[0098] The ultrasonic descaling device 2 includes an ultrasonic generator and an ultrasonic probe, the ultrasonic descaling device 2 includes a dry ice nozzle and an injection control valve, the dry ice supply system includes a dry ice storage tank 4, a compressed air source 5 and a pressure-resistant hose, and the monitoring device infrared thermometer and contact resistance tester are used to monitor the temperature and resistance value of the contact in real time, and transmit the data to the control circuit through the Bluetooth module BLE module chip;

[0099] The compressed air source 5 provides power to transport the dry ice particles to the dry ice nozzle through the hose;

[0100] The length of the insulating operating rod 1 is 4 meters;

[0101] The high-strength insulating material is alumina ceramic.

[0102] Insulated operating rod 1: 4 meters in length, made of alumina ceramic, with excellent mechanical strength and electrical insulation performance.

[0103] Ultrasonic descaling device 2: fixed to the front end of the insulating operating rod 1, including an ultrasonic generator and an ultrasonic probe. The ultrasonic probe can emit high-frequency vibrations, which produce tiny impacts and vibrations on the oxide layer on the contact surface, causing it to peel off.

[0104] Dry ice blasting device 3: Integrated with ultrasonic descaling device 2, it includes a dry ice nozzle and a blast control valve. The dry ice nozzle blasts dry ice particles at high speed onto the contact surface, utilizing the low temperature and impact force of the dry ice to remove residual oxides and provide a cooling effect.

[0105] The dry ice supply system includes a dry ice storage tank 4, a compressed air source 5, and a pressure-resistant hose. The compressed air source 5 provides power, transporting dry ice pellets through the hose to the dry ice nozzle. The pressure-resistant hose can not only withstand high pressure but also bend in multiple directions to adapt to different usage environments.

[0106] Monitoring device: an infrared thermometer and a contact resistance tester installed on the insulating operating rod 1, used to monitor the temperature and resistance value of the contacts in real time, and transmit the data to the monitoring terminal through the wireless transmission module. Example 3

[0107] Combined with attachment Figure 6 , special tools for isolating heating and cooling without power outage in substations below 110kV, including an insulating operating rod 1, an ultrasonic descaling device 2, a dry ice blasting device 3, a dry ice supply system, a monitoring device and a control circuit;

[0108] The front end of the insulating operating rod 1 is provided with an ultrasonic descaling device 2, and the ultrasonic descaling device 2 is integrated with a dry ice blasting device 3. The dry ice blasting device 3 is connected to the dry ice supply system through a connecting pipe. The insulating monitoring rod is provided with a monitoring device, which monitors the temperature and resistance value of the contact in real time. The control circuit is located in the control box;

[0109] The ultrasonic descaling device 2 includes an ultrasonic generator and an ultrasonic probe, the ultrasonic descaling device 2 includes a dry ice nozzle and an injection control valve, the dry ice supply system includes a dry ice storage tank 4, a compressed air source 5 and a pressure-resistant hose, and the monitoring device infrared thermometer and contact resistance tester are used to monitor the temperature and resistance value of the contacts in real time, and transmit the data to the control circuit through the A5133 5.8GHz frequency band two-way wireless transceiver module;

[0110] The compressed air source 5 provides power to transport the dry ice particles to the dry ice nozzle through the hose;

[0111] The length of the insulating operating rod 1 is 5 meters;

[0112] The high-strength insulating material is cross-linked polyethylene.

[0113] Insulated operating rod 1: 5 meters in length, made of cross-linked polyethylene, with excellent mechanical strength and electrical insulation properties.

[0114] Ultrasonic descaling device 2: fixed to the front end of the insulating operating rod 1, including an ultrasonic generator and an ultrasonic probe. The ultrasonic probe can emit high-frequency vibrations, which produce tiny impacts and vibrations on the oxide layer on the contact surface, causing it to peel off.

[0115] Dry ice blasting device 3: Integrated with ultrasonic descaling device 2, it includes a dry ice nozzle and a jet flow valve. The dry ice nozzle sprays dry ice particles at high speed onto the contact surface, using the low temperature and impact force of the dry ice to remove residual oxides and provide a cooling effect.

[0116] The dry ice supply system includes a dry ice storage tank 4, a compressed air source 5, and a pressure-resistant hose. The compressed air source 5 provides power, transporting dry ice pellets through the hose to the dry ice nozzle. The pressure-resistant hose can not only withstand high pressure but also bend in multiple directions to adapt to different usage environments.

[0117] Monitoring device: A radiation thermometer and a strain gauge resistance tester installed on the insulating operating rod 1 are used to monitor the temperature and resistance value of the contacts in real time and transmit the data to the monitoring terminal through a wireless transmission module. Example 4

[0118] Combined with attachment Figure 1-5, the control circuit includes a power module, a main control unit, an ultrasonic drive circuit, a dry ice blasting control circuit, a sensor interface, a human-computer interaction interface, and a communication module;

[0119] The main control unit includes a main control chip U6, a crystal oscillator X1 and a voltage stabilizing circuit. The main control chip U6 is electrically connected to the power module, ultrasonic drive circuit, dry ice blasting control circuit, sensor interface, human-computer interaction interface and communication module.

[0120] A resistor R34 is connected between pins 5 and 6 of the main control chip U6, a crystal oscillator X1 is connected in parallel to the resistor R34, and capacitors C37 and C40 at both ends of the crystal oscillator X1 are grounded;

[0121] The voltage stabilizing circuit includes capacitors C56, C57, C58, C59, and C60, which are connected in parallel, and two ends of C56 are connected to a 3.3V power supply and ground respectively;

[0122] Pin 7 of the main control chip U6 is connected to a 3.3V power supply and ground via a resistor R38 and a capacitor C54 respectively;

[0123] The power module includes chips U15 and U16, pin 1 of the chip U15 is grounded, pin 2 of the chip U15 is connected to a 12V power supply, and a capacitor C50 is connected between pins 3 and 5 of the chip U15, with both ends of the capacitor C50 being grounded and connected to a 5V power supply respectively;

[0124] A capacitor C51 is connected between pins 1 and 4 of the chip U16, with both ends of the capacitor C51 connected to the ground and a 3.3V power supply respectively, pins 2 and 4 of the chip U16 are connected, and pin 3 of the chip U16 is connected to a 5V power supply;

[0125] The ultrasonic drive circuit includes ultrasonic probes M1, M2, M3, M4 and a capacitor C6. Capacitors C7 and C8 are connected in parallel to the capacitor C6. A resistor R16 is connected in parallel to the capacitor C6. Both ends of the resistor R16 are connected to the ultrasonic probes M1 and M3 via MOS transistors Q1 and Q5, respectively. Both ends of the capacitor C7 are connected to the ultrasonic probes M1 and M3 via MOS transistors Q4 and Q8, respectively. The resistor R3 and capacitor C1 are connected in parallel to the MOS transistor Q1. The resistor R22 and capacitor C13 are connected in parallel to the MOS transistor Q5. The resistor R5 and capacitor C2 are connected in parallel to the MOS transistor Q4. The resistor R25 and capacitor C14 are connected in parallel to the MOS transistor Q8. The MOS transistors Q1 and Q5 are connected, and the MOS transistors Q4 and Q8 are connected.

[0126] The dry ice blasting control circuit includes a transistor Q9, the base of which is connected to pin 37 of the main control chip U6 via a resistor R39, and the collector of which is connected to a 12V power supply via a diode D1.

[0127] The control circuit mainly consists of the following parts:

[0128] Power module: Provides stable DC power to meet the voltage and current requirements of each functional module, and has overvoltage, overcurrent, and short-circuit protection functions.

[0129] Main control unit (MCU): As the core controller, it adopts a high-performance microcontroller and is responsible for coordinating ultrasonic drive, dry ice blasting and data processing.

[0130] Ultrasonic drive circuit: According to the instructions of the main control unit, it generates ultrasonic signals of specific frequency and power to drive the ultrasonic probe to work. The frequency and power of the ultrasonic signal can be flexibly switched during use.

[0131] Dry ice blasting control circuit: controls the start and stop of the dry ice blasting device 3, adjusts the blasting intensity and blasting volume, and ensures the blasting effect of the dry ice particles.

[0132] Sensor interface: Connect to radiation thermometer and strain gauge resistance tester to collect temperature and resistance data in real time.

[0133] Human-machine interaction interface: It uses a touch screen, without the need for additional button settings, for parameter setting and status display for operators to view and adjust.

[0134] Communication module: supports wired and wireless communication. Wireless communication supports multi-band data transmission, realizing remote transmission of monitoring data, facilitating remote monitoring and data recording.

[0135] The controller, heating wire and its supporting power supply and controller mentioned in the present invention can be provided by the manufacturer. In addition, the circuits, electronic components and modules involved in the present invention are all existing technologies and can be fully implemented by those skilled in the art without further explanation.

[0136] All features described in the description, the appended claims and the drawings are important features of the present invention, whether alone or in any combination.

[0137] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "an implementation", "specific implementation", "other implementations", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are included in at least one embodiment, implementation or example of the utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described above can also be combined in a suitable manner in any one or more embodiments, implementations or examples. The technical solutions recorded in this utility model also include technical solutions formed by any one or more specific features, structures, materials or characteristics described above, either alone or in combination.

[0138] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limiting the present invention. Ordinary technicians in this field can change, modify, replace, modify, delete some features, add features or re-combine features to form a technical solution in the above embodiments without departing from the principles and purpose of the present invention. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the innovative principles of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A special tool for isolating heating and cooling in substations below 110kV without power outage, characterized by: It includes an insulating operating rod (1), an ultrasonic descaling device (2), a dry ice blasting device (3), a dry ice supply system, a monitoring device, and a control circuit; The front end of the insulating operating rod (1) is provided with an ultrasonic descaling device (2), the ultrasonic descaling device (2) is integrated with a dry ice blasting device (3), the dry ice blasting device (3) is connected to a dry ice supply system, the insulating operating rod (1) is provided with a monitoring device, the monitoring device monitors the temperature and resistance value of the contact in real time, and the control circuit is located in the control box; The ultrasonic descaling device (2) comprises an ultrasonic generator and an ultrasonic probe, the ultrasonic descaling device (2) comprises a dry ice nozzle and an injection control valve, the dry ice supply system comprises a dry ice storage tank (4), a compressed air source (5) and a pressure-resistant hose, and the monitoring device infrared thermometer and contact resistance tester are used to monitor the temperature and resistance value of the contact in real time and transmit the data to the control circuit via a wireless transmission module.

2. The special tool for isolating heat without power outage and cooling in substations below 110 kV according to claim 1, characterized in that: The control circuit includes a power module, a main control unit, an ultrasonic drive circuit, a dry ice blasting control circuit, a sensor interface, a human-computer interaction interface, and a communication module.

3. The special tool for isolating heat without power outage and cooling in substations below 110 kV according to claim 1, characterized in that: The compressed gas source provides power to transport the dry ice particles to the dry ice nozzle through the hose.

4. The special tool for isolating heat without power outage and cooling in substations below 110 kV according to claim 1, characterized in that: The length of the insulating operating rod (1) is 2-5 meters.

5. The special tool for isolating heat without power outage and cooling in substations below 110 kV according to claim 1, characterized in that: The insulating operating rod (1) is made of high-strength insulating material.

6. The special tool for isolating heat without power outage and cooling in substations below 110 kV according to claim 5, characterized in that: The high-strength insulating material is epoxy resin fiber.

7. The special tool for isolating heat without power outage and cooling in substations below 110 kV according to claim 2, characterized in that: The main control unit includes a main control chip U6, a crystal oscillator X1 and a voltage stabilizing circuit. The main control chip U6 is electrically connected to the power module, ultrasonic drive circuit, dry ice blasting control circuit, sensor interface, human-computer interaction interface and communication module. A resistor R34 is connected between pins 5 and 6 of the main control chip U6, a crystal oscillator X1 is connected in parallel to the resistor R34, and capacitors C37 and C40 at both ends of the crystal oscillator X1 are grounded; The voltage stabilizing circuit includes capacitors C56, C57, C58, C59, and C60, which are connected in parallel, and two ends of C56 are connected to a 3.3V power supply and ground respectively; Pin 7 of the main control chip U6 is connected to a 3.3V power supply and ground via a resistor R38 and a capacitor C54 respectively.

8. The special tool for isolating heat without power outage and cooling in substations below 110 kV according to claim 7, characterized in that: The power module includes chips U15 and U16, pin 1 of the chip U15 is grounded, pin 2 of the chip U15 is connected to a 12V power supply, and a capacitor C50 is connected between pins 3 and 5 of the chip U15, with both ends of the capacitor C50 being grounded and connected to a 5V power supply respectively; A capacitor C51 is provided between pins 1 and 4 of the chip U16, and both ends of the capacitor C51 are connected to the ground and a 3.3V power supply respectively. Pins 2 and 4 of the chip U16 are connected, and pin 3 of the chip U16 is connected to a 5V power supply.

9. The special tool for isolating heat without power outage and cooling in substations below 110 kV according to claim 7, characterized in that: The ultrasonic drive circuit includes ultrasonic probes M1, M2, M3, M4, and a capacitor C6. Capacitors C7 and C8 are connected in parallel to the capacitor C6. A resistor R16 is connected in parallel to the capacitor C6. The two ends of the resistor R16 are connected to the ultrasonic probes M1 and M3 via MOS transistors Q1 and Q5, respectively. The two ends of the capacitor C7 are connected to the ultrasonic probes M1 and M3 via MOS transistors Q4 and Q8, respectively. The resistor R3 and capacitor C1 are connected in parallel to the MOS transistor Q1. The resistor R22 and capacitor C13 are connected in parallel to the MOS transistor Q5. The resistor R5 and capacitor C2 are connected in parallel to the MOS transistor Q4. The resistor R25 and capacitor C14 are connected in parallel to the MOS transistor Q8. The MOS transistors Q1 and Q5 are connected, and the MOS transistors Q4 and Q8 are connected.

10. The special tool for isolating heat without power outage and cooling in substations below 110 kV according to claim 7, characterized in that: The dry ice blasting control circuit includes a transistor Q9, the base of which is connected to pin 37 of the main control chip U6 via a resistor R39, and the collector of which is connected to a 12V power supply via a diode D1.

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