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

Abstract

The invention relates to the technical field of power equipment maintenance, and discloses a special tool for isolating heating 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 device has the advantages that under the synergistic effect of ultrasonic waves and dry ice spraying, under the condition that power is not cut off, an oxide layer of a contact of the disconnecting switch is safely and efficiently removed, contact resistance is reduced, heating is reduced, and the purpose of cooling is achieved.

Description

Technical Field

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

[0002] In the power system, the isolating switch is a key high-voltage equipment. The isolating switch is a switching device that is mainly used for "isolating power supply, switching operation, connecting and disconnecting small current circuits" and has no arc extinguishing function. When the isolating switch is in the open position, there is an insulation distance that meets the specified requirements and an obvious disconnection mark between the contacts; when it is in the closed position, it is a switching device that can carry the current under normal circuit conditions and the current under abnormal conditions (such as short circuit) within a specified time. It is generally used as a high-voltage isolating switch, that is, an isolating switch with a rated voltage of more than 1kV. Its working principle and structure are relatively simple, but due to its large usage and high working reliability requirements, it has a great impact on the design, establishment and safe operation of substations and power plants. The main feature of the isolating switch is that it has no arc extinguishing ability and can only open and close the circuit without load current.

[0003] The contact surface of the isolating switch is prone to oxidation, which is the result of the combined effect 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 the conductivity.

[0004] The reasons for the oxidation of the isolating switch contacts mainly include the following aspects: ‌Contact surface is too small‌: The contact surface between the moving contact blade and the static contact is too small, and the current is concentrated and then dispersed, resulting in reduced spring pressure, oxidation of the contact surface, increased contact resistance, and generation of a large amount of heat‌.

[0005] 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.

[0006] 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.

[0007] Improper operation: When operating the isolating switch, the speed is too slow or the operating force is too large, resulting in too many arc burning times between the moving and static contacts and oxidation of the contact surface.

[0008] In order to solve the problem of oxidation of the isolating switch contacts, the following measures can be taken: ‌Clean the oxide layer‌: Check the contacts of the isolating switch regularly, remove the oxide layer on the surface, increase the contact area, and apply conductive paste on the contact surface to prevent further oxidation.

[0009] ‌Adjust the contact surface‌: Make sure 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.

[0010] ‌Use appropriate materials‌: Choose silver-nickel alloy as the contact material because it has good conductivity and hardness and is not easy to oxidize and rust.

[0011] ‌Control load‌: Avoid long-term overload operation of the isolating switch, and adjust the load in time to ensure that it operates within the rated range.

[0012] Standardized operation: Standardize the operating procedures of the isolating switch to ensure that the operating speed is moderate and the force is appropriate to avoid arc burns and contact surface damage caused by improper operation.

[0013] 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.

[0014] The contact surface of the disconnector oxidizes to form an oxide layer. This oxide layer increases the contact resistance of the contact and causes heating. If not handled in time, it may cause equipment failure or even cause a safety accident. Traditional maintenance methods usually require power outages to clean or replace the contacts, which not only affects the continuity of power supply, but also causes economic losses.

[0015] At the same time, the existing maintenance methods cannot clean the contacts thoroughly and effectively, and cannot ensure the subsequent normal operation of the contacts.

[0016] 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

[0017] The technical problem to be solved by the present invention is that the 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.

[0018] In order to solve the above technical problems, the technical solution provided by the present invention is: 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; The front end of the insulating operating rod is provided with an ultrasonic descaling device, the ultrasonic descaling device is integrated with a dry ice blasting device, the dry ice blasting device is connected to the dry ice supply system, the insulating monitoring rod 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 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.

[0019] Furthermore, 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.

[0020] Further, a compressed gas source provides power to transport dry ice particles to a dry ice nozzle through a hose.

[0021] Furthermore, the length of the insulating operating rod is 2-5 meters.

[0022] Furthermore, the insulating operating rod is made of high-strength insulating material.

[0023] Furthermore, the high-strength insulating material is epoxy resin fiber.

[0024] Furthermore, the main control unit includes a main control chip U6, a crystal oscillator X1 and a voltage stabilizing circuit, and 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; 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 respectively; 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 a ground respectively; Pin No. 7 of the main control chip U6 is connected to a 3.3V power supply and ground through a resistor R38 and a capacitor C54 respectively.

[0025] Further, 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, a capacitor C50 is connected between pins 3 and 5 of the chip U15, and two ends of the capacitor C50 are grounded and 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.

[0026] Further, the ultrasonic drive circuit includes ultrasonic probes M1, M2, M3, M4 and capacitor C6, the capacitor C7 and C8 are connected in parallel to the capacitor C6, the capacitor C6 is connected in parallel to a resistor R16, both ends of the resistor R16 are connected to the ultrasonic probes M1 and M3 through MOS tubes Q1 and Q5 respectively, both ends of the capacitor C7 are connected to the ultrasonic probes M1 and M3 through MOS tubes Q4 and Q8 respectively, the MOS tube Q1 is connected in parallel to a resistor R3 and a capacitor C1, the MOS tube Q5 is connected in parallel to a resistor R22 and a capacitor C13, the MOS tube Q4 is connected in parallel to a resistor R5 and a capacitor C2, the MOS tube Q8 is connected in parallel to a resistor R25 and a capacitor C14, the MOS tubes Q1 and Q5 are connected, and the MOS tubes Q4 and Q8 are connected.

[0027] Furthermore, the dry ice blasting control circuit includes a transistor Q9, a base of the transistor Q9 is connected to pin 37 of the main control chip U6 via a resistor R39, and a collector of the transistor Q9 is connected to a 12V power supply via a diode D1.

[0028] The advantages of the present invention compared with the prior art are: High safety: high-strength insulation materials and multiple safety protection measures are used to ensure the safety of operators in high-voltage environments.

[0029] High efficiency: The oxide layer of the contacts can be removed without power outage to ensure the continuity of power supply.

[0030] Significant effect: The combination of ultrasonic wave and dry ice blasting can completely remove the contact oxide layer, reduce contact resistance and reduce heat generation.

[0031] Intelligent control: Equipped with advanced control circuit, it can monitor and adjust working parameters in real time to optimize the processing effect.

[0032] Easy to operate: The equipment has a compact structure, high integration, and is easy to carry and operate.

[0033] 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

[0034] Figure 1 This is the circuit schematic of the main control chip.

[0035] Figure 2 It is the power drive circuit diagram of ultrasonic transducer.

[0036] Figure 3 This is the dry ice blasting motor control schematic.

[0037] Figure 4 It is the temperature measurement and human-machine interface circuit diagram.

[0038] Figure 5 It is the power supply circuit diagram.

[0039] Figure 6 It is a structural diagram of the device. DETAILED DESCRIPTION

[0040] 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 positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 a limitation on the present invention. In addition, the terms "first" and "second" are used only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the 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 variation thereof are intended to cover non-exclusive inclusions.

[0041] The present invention is further described in detail below in conjunction with the accompanying drawings. Example

[0042] Combined with Figure 6 , special tools for isolating heating and cooling without power outage in substations below 110kV, including insulating operating rod 1, ultrasonic descaling device 2, dry ice blasting device 3, dry ice supply system, monitoring device and control circuit; 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; 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 them to the control circuit through the AB433L PLC dedicated wireless Ethernet series; The compressed gas source 5 provides power to transport the dry ice particles to the dry ice nozzle through the hose; The length of the insulating operating rod 1 is 3 meters; The high-strength insulating material is epoxy resin fiber.

[0043] Insulating 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.

[0044] Ultrasonic descaling device 2: fixed at 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.

[0045] Dry ice blasting device 3: integrated with ultrasonic descaling device 2, including dry ice nozzle and blasting control valve. The dry ice nozzle blasts dry ice particles onto the contact surface at high speed, using the low temperature and impact force of dry ice to remove residual oxides and achieve a cooling effect.

[0046] Dry ice supply system: includes dry ice storage tank 4, compressed air source 5 and pressure-resistant hose. Compressed air source 5 provides power to transport dry ice particles to dry ice nozzle through the hose.

[0047] Monitoring device: an infrared thermometer and a contact resistance tester installed on the insulating operating rod 1, which are 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.

[0048] Control circuit: located in the control box of the equipment, 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.

[0049] Combined with 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; 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. 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 respectively; 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 a ground respectively; Pin 7 of the main control chip U6 is connected to a 3.3V power supply and ground through a resistor R38 and a capacitor C54 respectively; The power module includes chips U15 and U16, wherein 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, and both ends of the capacitor C50 are connected to the ground and 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; The ultrasonic drive circuit includes ultrasonic probes M1, M2, M3, M4 and capacitor C6, the capacitor C7 and C8 are connected in parallel to the capacitor C6, the capacitor C6 is connected in parallel to a resistor R16, both ends of the resistor R16 are connected to the ultrasonic probes M1 and M3 through MOS transistors Q1 and Q5 respectively, both ends of the capacitor C7 are connected to the ultrasonic probes M1 and M3 through MOS transistors Q4 and Q8 respectively, the MOS transistor Q1 is connected in parallel to a resistor R3 and a capacitor C1, the MOS transistor Q5 is connected in parallel to a resistor R22 and a capacitor C13, the MOS transistor Q4 is connected in parallel to a resistor R5 and a capacitor C2, the MOS transistor Q8 is connected in parallel to a resistor R25 and a capacitor C14, the MOS transistors Q1 and Q5 are connected, and the MOS transistors Q4 and Q8 are connected; The dry ice spraying 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.

[0050] The control circuit mainly consists of the following parts: 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.

[0051] 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.

[0052] 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.

[0053] 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.

[0054] Sensor interface: Connect to infrared thermometer and contact resistance tester to collect temperature and resistance data in real time.

[0055] Human-machine interaction interface: includes display screen and control buttons for parameter setting and status display for operators to view and adjust.

[0056] Communication module: supports wireless communication, realizes remote transmission of monitoring data, and facilitates remote monitoring and data recording.

[0057] How it works System initialization: After power-on, the main control unit initializes each module and enters standby mode.

[0058] Parameter setting: Through the human-machine interface, the operator sets the working parameters such as ultrasonic frequency, power and dry ice blasting intensity.

[0059] 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.

[0060] 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 according to the data analysis results to optimize the removal effect.

[0061] Data transmission: Monitoring data is transmitted to the monitoring terminal through the communication module for remote monitoring and recording.

[0062] Stop operation: After the task is completed, the main control unit shuts down each functional module in turn and the system returns to standby mode.

[0063] How to use 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 contact.

[0064] Parameter setting: Set the working parameters such as ultrasonic frequency, power and dry ice blasting intensity through the human-computer interaction interface to ensure adaptation to different degrees of oxide layers.

[0065] 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.

[0066] 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.

[0067] 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.

[0068] 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.

[0069] Retract the equipment: Turn off the power supply of the equipment and retract the insulating operating rod 1 and other auxiliary equipment.

[0070] The tool uses a combination of ultrasonic descaling and dry ice cleaning to quickly and safely remove the oxide layer of the contacts without affecting power supply, thereby reducing contact resistance and heat generation, thereby achieving the purpose of cooling. Example

[0071] Combined with Figure 6 , special tools for isolating heating and cooling without power outage in substations below 110kV, including insulating operating rod 1, ultrasonic descaling device 2, dry ice blasting device 3, dry ice supply system, monitoring device and control circuit; 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; 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 them to the control circuit through the Bluetooth module BLE module chip; The compressed gas source 5 provides power to transport the dry ice particles to the dry ice nozzle through the hose; The length of the insulating operating rod 1 is 4 meters; The high-strength insulating material is alumina ceramics.

[0072] Insulated operating rod 1: 4 meters in length, made of alumina ceramic, with excellent mechanical strength and electrical insulation performance.

[0073] Ultrasonic descaling device 2: fixed at 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.

[0074] Dry ice blasting device 3: integrated with ultrasonic descaling device 2, including dry ice nozzle and blasting control valve. The dry ice nozzle blasts dry ice particles onto the contact surface at high speed, using the low temperature and impact force of dry ice to remove residual oxides and achieve a cooling effect.

[0075] Dry ice supply system: includes dry ice storage tank 4, compressed air source 5 and pressure-resistant hose. Compressed air source 5 provides power to transport dry ice particles to dry ice nozzle through the hose. The pressure-resistant hose can not only withstand greater pressure, but also bend in multiple directions, so it can adapt to different usage environments.

[0076] Monitoring device: an infrared thermometer and a contact resistance tester installed on the insulating operating rod 1, which are 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

[0077] Combined with Figure 6 , special tools for isolating heating and cooling without power outage in substations below 110kV, including insulating operating rod 1, ultrasonic descaling device 2, dry ice blasting device 3, dry ice supply system, monitoring device and control circuit; 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 through a connecting pipe. 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; 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 them to the control circuit through the A5133 5.8GHz frequency band two-way wireless transceiver module; The compressed gas source 5 provides power to transport the dry ice particles to the dry ice nozzle through the hose; The length of the insulating operating rod 1 is 5 meters; The high-strength insulating material is cross-linked polyethylene.

[0078] Insulated operating rod 1: 5 meters in length, made of cross-linked polyethylene, with excellent mechanical strength and electrical insulation properties.

[0079] Ultrasonic descaling device 2: fixed at 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.

[0080] Dry ice blasting device 3: integrated with ultrasonic descaling device 2, including a dry ice nozzle and a blasting flow valve. The dry ice nozzle blasts dry ice particles onto the contact surface at high speed, using the low temperature and impact force of the dry ice to remove residual oxides and achieve a cooling effect.

[0081] Dry ice supply system: includes dry ice storage tank 4, compressed air source 5 and pressure-resistant hose. Compressed air source 5 provides power to transport dry ice particles to dry ice nozzle through the hose. The pressure-resistant hose can not only withstand greater pressure, but also bend in multiple directions, so it can adapt to different usage environments.

[0082] 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 the wireless transmission module. Example

[0083] Combined with 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; 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. 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 respectively; 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 a ground respectively; Pin 7 of the main control chip U6 is connected to a 3.3V power supply and ground through a resistor R38 and a capacitor C54 respectively; The power module includes chips U15 and U16, wherein 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, and both ends of the capacitor C50 are connected to the ground and 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; The ultrasonic drive circuit includes ultrasonic probes M1, M2, M3, M4 and capacitor C6, the capacitor C7 and C8 are connected in parallel to the capacitor C6, the capacitor C6 is connected in parallel to a resistor R16, both ends of the resistor R16 are connected to the ultrasonic probes M1 and M3 through MOS transistors Q1 and Q5 respectively, both ends of the capacitor C7 are connected to the ultrasonic probes M1 and M3 through MOS transistors Q4 and Q8 respectively, the MOS transistor Q1 is connected in parallel to a resistor R3 and a capacitor C1, the MOS transistor Q5 is connected in parallel to a resistor R22 and a capacitor C13, the MOS transistor Q4 is connected in parallel to a resistor R5 and a capacitor C2, the MOS transistor Q8 is connected in parallel to a resistor R25 and a capacitor C14, the MOS transistors Q1 and Q5 are connected, and the MOS transistors Q4 and Q8 are connected; The dry ice spraying 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.

[0084] The control circuit mainly consists of the following parts: 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.

[0085] 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.

[0086] 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.

[0087] Dry ice blasting control circuit: controls the start and stop of the dry ice blasting device 3, adjusts the blasting intensity and blasting amount, and ensures the blasting effect of the dry ice particles.

[0088] Sensor interface: Connect radiation thermometer and strain gauge resistance tester to collect temperature and resistance data in real time.

[0089] 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.

[0090] Communication module: supports wired and wireless communications. Wireless communications support multi-band data transmission, enabling remote transmission of monitoring data and facilitating remote monitoring and data recording.

[0091] 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 elaboration.

[0092] All features described in the description, the attached claims and the drawings are essential features for the invention both individually and in any combination.

[0093] 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 conjunction with the embodiment or example are included in at least one embodiment, implementation or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described above may also be combined in a suitable manner in any one or more embodiments, implementations or examples. The technical solutions recorded in the present invention also include technical solutions formed by any one or more of the specific features, structures, materials or characteristics described above in a separate or combined manner.

[0094] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present invention. Ordinary technicians in the 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 without power outage in substations below 110kV, characterized by: It comprises 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; An ultrasonic descaling device (2) is provided at the front end of the insulating operating rod (1), a dry ice blasting device (3) is integrated on the ultrasonic descaling device (2), the dry ice blasting device (3) is connected to a dry ice supply system, a monitoring device is provided on the insulating monitoring rod (1), the monitoring device monitors the temperature and resistance value of the contact in real time, and the control circuit is located in a 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 heating and cooling below 110 kV in substations without power outage according to claim 1 is characterized by: 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 heating and cooling below 110 kV in substations without power outage 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 heating and cooling below 110 kV in a substation without power outage 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 heating and cooling below 110 kV in substations without power outage 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 heating and cooling below 110 kV in a substation without power outage according to claim 5, characterized in that: The high-strength insulating material is epoxy resin fiber.

7. The special tool for isolating heating and cooling below 110 kV in a substation without power outage 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 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. 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 respectively; 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 a ground respectively; Pin No. 7 of the main control chip U6 is connected to a 3.3V power supply and ground through a resistor R38 and a capacitor C54 respectively.

8. The special tool for isolating heating and cooling below 110 kV in a substation without power outage according to claim 7, characterized in that: The power module includes chips U15 and U16, wherein 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, and both ends of the capacitor C50 are connected to the ground and 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 heating and cooling below 110 kV in a substation without power outage according to claim 7, characterized in that: The ultrasonic drive circuit includes ultrasonic probes M1, M2, M3, M4 and capacitor C6, capacitors C7 and C8 are connected in parallel to the capacitor C6, resistor R16 is connected in parallel to the capacitor C6, two ends of the resistor R16 are connected to the ultrasonic probes M1 and M3 through MOS tubes Q1 and Q5 respectively, two ends of the capacitor C7 are connected to the ultrasonic probes M1 and M3 through MOS tubes Q4 and Q8 respectively, resistor R3 and capacitor C1 are connected in parallel to the MOS tube Q1, resistor R22 and capacitor C13 are connected in parallel to the MOS tube Q5, resistor R5 and capacitor C2 are connected in parallel to the MOS tube Q4, resistor R25 and capacitor C14 are connected in parallel to the MOS tube Q8, the MOS tube Q1 is connected to Q5, and the MOS tube Q4 is connected to Q8.

10. The special tool for isolating heating and cooling without power outage in substations below 110 kV according to claim 7, characterized in that: The dry ice spraying 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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