Insulating oil leakage overhauling device for transformer

Abstract

The utility model discloses a transformer insulating oil leakage overhauling device, which relates to the technical field of transformer overhauling, and comprises a pressure transmitter module, which is arranged at the same height of a transformer insulating oil leakage part and is used for monitoring the oil pressure in a transformer; the vacuum transmitter is arranged in the maintenance device and is used for detecting the vacuum degree in the transformer; the vacuum unit is arranged in the maintenance device and used for extracting air possibly invading the interior of the transformer in the maintenance process and performing vacuum drying operation on transformer equipment; and the maintenance control box is used for receiving detection signals of the pressure transmitter module and the vacuum transmitter to carry out maintenance control on the transformer. The oil leakage position of the transformer can be monitored and adjusted in real time, it is ensured that the internal oil pressure is equal to the external atmospheric pressure, air suction or oil overflow caused by differential pressure is effectively avoided, and the work efficiency of leakage overhaul of the power transformer is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of transformer maintenance, in particular to a transformer insulating oil leakage maintenance device. Background Art

[0002] In the power system, the transformer is an indispensable component, and its normal operation is of vital importance to the stability of the power system. However, during the long-term operation of the transformer, due to various reasons such as seal aging and vibration, oil leakage may occur. This will not only waste precious transformer insulating oil resources, but also threaten the normal operation of the transformer and even cause damage to the transformer. Therefore, how to effectively solve the problem of transformer oil leakage has always been a research hotspot in the power field.

[0003] At present, the solutions to the oil leakage problem of transformers mainly include regular inspections, material plugging and maintenance, etc. However, these methods are not only labor-intensive, but also difficult to fundamentally solve the oil leakage problem. In addition, there are some technical solutions that attempt to solve the oil leakage problem by changing the oil leakage level structure of the transformer or adding plugging sealing materials, but these solutions often have problems such as complex structure, high cost, and difficult maintenance. The traditional oil drainage and maintenance method not only involves cumbersome process flow, but also takes more than ten days to deal with the oil leakage of ultra-high voltage transformers. Long-term power outages have had a significant adverse impact on economic development.

[0004] Therefore, it is of great significance to develop an insulating oil leakage inspection and repair device with stable performance and complete functions. Utility Model Content

[0005] The technical problem to be solved by the utility model is to solve the deficiencies in the prior art and to design a transformer insulating oil leakage inspection and repair device. The application can not only monitor the oil pressure status of the transformer in real time and automatically adjust the oil pressure balance according to the oil pressure change, but also solve the air problem that may exist inside the transformer during the inspection and repair process, and can significantly reduce the labor intensity of the staff and greatly improve the work efficiency of the leakage inspection and repair of the power transformer.

[0006] The technical solution adopted by the utility model to solve its technical problems is:

[0007] A transformer insulating oil leakage inspection and repair device, comprising:

[0008] The pressure transmitter module is set at the same height as the transformer insulation oil leakage point to monitor the oil pressure inside the transformer;

[0009] The vacuum transmitter is installed in the maintenance device to detect the vacuum degree inside the transformer;

[0010] The vacuum unit is installed in the maintenance device to extract the air that may invade the inside of the transformer during the maintenance process and perform vacuum drying operations on the transformer equipment;

[0011] Maintenance control box, used to receive detection signals from pressure transmitter module and vacuum transmitter to perform maintenance control on transformer;

[0012] A condensation tank, an electrical control box, a vacuum pump, a Roots pump and a vacuum transmitter are arranged inside the maintenance control box; a PLC controller, a display screen and buttons are arranged in the electrical control box; an air seepage valve and an air extraction valve are arranged at the bottom of the condensation tank, and the air extraction valve is connected to the air extraction pipeline through an air extraction flange; an air control valve is arranged on the condensation tank; an electric air extraction valve is arranged at the upper end of the condensation tank, and the vacuum pump is connected to the vacuum solenoid valve.

[0013] As a further technical solution of the utility model, the pressure transmitter module includes: a pressure transmitter, a first connecting joint, an oil guide pipe, and a second connecting joint; the pressure transmitter is arranged at the same height as the leakage position of the transformer insulating oil, one end of the oil guide pipe is connected to the oil filling valve at the bottom of the transformer oil tank through the first connecting joint, and the other end of the oil guide pipe is connected to the pressure transmitter through the second connecting joint.

[0014] As a further technical solution of the utility model, the pressure transmitter is adsorbed on the transformer oil tank casing by a magnet.

[0015] As a further technical solution of the utility model, the oil guide pipe adopts a transparent PUN-H-10×2 hose, and the first connecting joint and the second connecting joint are PV-10 quick connectors.

[0016] As a further technical solution of the utility model, the vacuum unit includes: a vacuum pump, a Roots pump, a condenser, an exhaust pipe, an electric exhaust valve and an air-controlled valve. The Roots pump and the vacuum pump are connected to the transformer oil tank through an exhaust pipe, the exhaust pipe is connected to the condenser, and an electric exhaust valve and an air-controlled valve are arranged on the exhaust pipe.

[0017] As a further technical solution of the utility model, a box door is arranged on the maintenance control box, and a window for displaying a display screen and buttons is arranged on the box door.

[0018] As a further technical solution of the utility model, a temperature and humidity sensor is arranged on the outside of the maintenance control box to monitor the temperature and humidity of the maintenance working environment.

[0019] As a further technical solution of the utility model, a cooling fan is arranged inside the maintenance control box.

[0020] Compared with the prior art, the utility model has the following beneficial effects:

[0021] 1. The utility model can monitor and adjust the oil leakage position of the transformer in real time, ensure that the internal oil pressure is equal to the external atmospheric pressure, and effectively avoid air inhalation or oil overflow due to pressure difference during the maintenance process, thereby improving the work efficiency of power transformer leakage maintenance.

[0022] 2. The pressure transmitter module detects the oil pressure in the transformer tank and transmits it to the maintenance control box. During the transformer maintenance process, the pressure transmitter will continuously monitor the changes in the oil pressure inside the transformer and feed back the real-time monitored oil pressure data to the PLC control module in the maintenance control box. The PLC control module accurately controls the electric exhaust valve and the air control valve based on the preset oil pressure threshold and the received oil pressure data. The pressure transmitter is adsorbed on the transformer tank casing by a magnet, which is convenient for installation and disassembly to ensure its normal functioning.

[0023] 3. The oil guide pipe adopts a transparent PUN-H-10×2 hose, and the first connecting joint and the second connecting joint are PV-10 quick connectors to ensure that the oil pipe can be quickly connected.

[0024] 4. The utility model is based on the PLC control module, combined with the exhaust capacity of the high-efficiency vacuum pump and the Roots pump, to achieve deep drying and thorough exhaust of the inside of the transformer, and condensation treatment is carried out through the condensation tank, thereby achieving drying and exhaust of the inside of the transformer; improving the operating efficiency of the system, reducing the risk of human operation, and ensuring the maintenance quality of the transformer.

[0025] 5. A door is provided on the maintenance control box, and a window for displaying a display screen and buttons is provided on the door; the display screen and buttons are embedded in the window on the door through a control panel for easy operation.

[0026] 6. A temperature and humidity sensor is installed on the outside of the maintenance control box to detect the temperature and humidity of the maintenance working environment. By deploying temperature and humidity sensors at key locations, the temperature and humidity data around the transformer are continuously collected, the temperature and humidity changes near the transformer are detected in real time, and early warnings are issued according to preset thresholds.

[0027] 7. A cooling fan is installed inside the maintenance control box to introduce cold air flow into the cabinet to achieve uniform temperature distribution to prevent the occurrence of local high temperature in the cabinet. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a structural diagram of a transformer insulating oil leakage inspection and repair device proposed by the utility model;

[0029] Figure 2 This is a control structure diagram of a transformer insulating oil leakage inspection and repair device proposed by the utility model;

[0030] Figure 3 This is a connection structure diagram of the pressure transmitter module proposed by the utility model;

[0031] Figure 4 This is a connection structure diagram of the vacuum transmitter proposed in the utility model.

[0032] As shown in the figure:

[0033] 10-pressure transmitter module, 20-vacuum transmitter, 30-maintenance control box;

[0034] 101 - pressure transmitter, 102 - first connecting joint, 103 - oil guide pipe, 104 - second connecting joint, 105 - magnet, 106 - oil filling valve;

[0035] 201-vacuum pump, 202-Roots pump, 203-condenser, 204-gas control valve, 205-exhaust pipeline, 206-electric exhaust valve;

[0036] 301-Electrical control box. DETAILED DESCRIPTION

[0037] The following describes the specific implementation of the utility model in conjunction with the accompanying drawings and embodiments:

[0038] It should be noted that the structures, colors, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification so that people familiar with this technology can understand and read them, and are not used to limit the conditions under which the present invention can be implemented. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0039] At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" cited in this specification are only for the convenience of description and are not used to limit the scope of the implementation of the present utility model. Changes or adjustments to their relative relationships should be regarded as the scope of the implementation of the present utility model without substantially changing the technical content.

[0040] like Figure 1 As shown, the utility model provides a transformer insulating oil leakage inspection and repair device, comprising:

[0041] The pressure transmitter module 10 is arranged at the same height as the transformer insulating oil leakage position and is used to monitor the oil pressure inside the transformer;

[0042] The vacuum transmitter 20 is arranged in the maintenance device and is used to detect the vacuum degree inside the transformer;

[0043] The vacuum unit is installed in the maintenance device to extract the air that may invade the inside of the transformer during the maintenance process and perform vacuum drying operations on the transformer equipment;

[0044] The maintenance control box 30 is used to receive the detection signals of the pressure transmitter module and the vacuum transmitter to perform maintenance control on the transformer;

[0045] A condensation tank, an electrical control box 301, a vacuum pump, a Roots pump and a vacuum transmitter are arranged inside the maintenance control box; a PLC controller, a display screen and buttons are arranged in the electrical control box; a gas seepage valve and a gas extraction valve are arranged at the bottom of the condensation tank, and the gas extraction valve is connected to the gas extraction pipeline through a gas extraction flange; a gas control valve is arranged on the condensation tank; an electric gas extraction valve is arranged at the upper end of the condensation tank, and the vacuum pump is connected to the vacuum solenoid valve.

[0046] In the embodiment of the utility model, the pressure transmitter module, the vacuum transmitter and the maintenance control box are used to adjust the internal and external oil pressure balance of the transformer, vacuum drying and exhaust, monitor the oil vacuum leakage rate and predict the weather.

[0047] In the embodiment of the utility model, the pressure transmitter module 10 includes: a pressure transmitter 101, a first connection joint 102, an oil guide pipe 103, and a second connection joint 104; the pressure transmitter 101 is arranged on the side wall of the transformer oil tank, one end of the oil guide pipe 103 is connected to the oil filling valve 106 at the bottom of the transformer oil tank through the first connection joint 102, and the other end of the oil guide pipe 103 is connected to the pressure transmitter 101 through the second connection joint 104. Among them, the pressure transmitter 101 is adsorbed on the side wall of the transformer oil tank through a magnet 105, which is convenient for installation and disassembly to ensure its normal operation. The oil guide pipe adopts a transparent PUN-H-10×2 hose, and the first connection joint and the second connection joint are PV-10 quick connectors to ensure that the oil pipe can be quickly connected.

[0048] The pressure transmitter module detects the oil pressure in the transformer tank and transmits it to the maintenance control box. During the transformer maintenance process, the pressure transmitter continuously monitors the changes in the oil pressure inside the transformer and feeds back the real-time monitored oil pressure data to the PLC control module in the maintenance control box. The PLC control module accurately controls the electric air extraction valve and the air control valve based on the preset oil pressure threshold and the received oil pressure data.

[0049] When the system detects that the internal oil pressure at the oil defect location is higher than the preset threshold, the PLC control module will immediately instruct the electric air extraction valve to open, thereby starting the air extraction process. When the internal pressure is equal to the external atmospheric pressure, the electric air extraction valve automatically closes. If the pressure detected by the pressure monitoring system is lower than the atmospheric pressure, the air control valve will respond after 10 seconds, and the PLC controller will issue an adjustment command to command the inflation valve to open and inject air until the internal and external pressures are completely balanced.

[0050] During the whole process, the PLC control module will continuously monitor the changes in oil pressure and make real-time adjustments to the electric air extraction valve and the air control valve according to the actual situation to ensure that the oil pressure inside and outside the transformer is always balanced. This automatic control method not only improves the response speed of the system, but also reduces the need for human intervention and improves the operational stability and safety of the transformer.

[0051] The utility model is based on a PLC control module and combines the air extraction capabilities of a high-efficiency vacuum pump and a Roots pump to achieve deep drying and thorough exhaustion of the interior of the transformer.

[0052] After the system is started, the PLC control module will gradually adjust the working status of the vacuum pump and Roots pump according to the preset air extraction program. These pumps are connected to the transformer respirator through the air extraction pipe and the air pipe joint to extract the air and moisture inside the transformer. In the air extraction process, the condenser plays a key role. It can quickly condense the steam in the gas into liquid, effectively preventing oil vapor from entering the vacuum pump, thereby protecting the service life and performance of the vacuum pump.

[0053] As the vacuum is being pumped, the vacuum detection system monitors the vacuum inside the transformer in real time and transmits the collected data to the PLC control storage module for recording. The vacuum inside the transformer continues to rise. When it reaches a standard below 200Pa, the system will prompt whether to start the vacuum leakage rate detection. After the vacuum leakage rate detection is completed and the results meet the standards, the equipment will re-enter the vacuum working mode and continue to maintain a high vacuum environment for 1 to 2 hours. The operation process of the entire vacuum drying and exhaust system is based on the precise control and real-time monitoring of the PLC control module; improve the operating efficiency of the system, reduce the risk of human operation, and ensure the maintenance quality of the transformer.

[0054] In the embodiment of the utility model, the temperature and humidity data around the transformer are continuously collected by deploying temperature and humidity sensors at key positions. At the same time, the 4G networking module system also obtains real-time weather conditions within a few kilometers by accessing external meteorological data sources, including temperature, wind speed, wind direction, rainfall, etc. The collected data will be transmitted to the PLC control unit to detect the temperature and humidity changes near the transformer in real time, and issue an early warning based on the preset threshold. Once the humidity exceeds the allowable working range, the system will immediately issue an early warning signal to notify the maintenance personnel to stop the maintenance work. This helps to prevent the problem of insulation performance degradation of the transformer caused by excessive humidity.

[0055] In the embodiment of the utility model, the vacuum unit includes: a vacuum pump 201, a Roots pump 202, a condensation tank 203, an exhaust pipe 205, an electric exhaust valve 206 and a gas control valve 204. The Roots pump 202 and the vacuum pump 201 are connected to the transformer oil tank through the exhaust pipe 205, the exhaust pipe 205 is connected to the condensation tank 203, and the exhaust pipe 205 is provided with an electric exhaust valve 206 and a gas control valve 204.

[0056] The vacuum transmitter is used to monitor the vacuum degree inside the transformer in real time and feed back the vacuum degree data to the PLC module. With the precise control of the PLC module and the powerful exhaust capacity of the vacuum pump and Roots pump, the air and moisture inside the transformer can be extracted and condensed through the condensation tank, thereby achieving drying and exhausting inside the transformer. With the precise control of the PLC module, the vacuum leakage rate of the transformer can be monitored and accurately detected in real time.

[0057] A door is provided on the maintenance control box 30, and a window for displaying a display screen and buttons is provided on the door; the display screen and buttons are embedded in the window on the door through a control panel, and the display screen is a Siemens 7-inch touch screen for easy operation.

[0058] In the embodiment of the utility model, a temperature and humidity sensor is arranged on the outside of the maintenance control box to detect the temperature and humidity of the maintenance working environment. Before and during the maintenance work, the temperature and humidity measurement system will continuously monitor the temperature and humidity conditions in the working environment and conduct a comprehensive analysis and evaluation. If the humidity in the working environment exceeds the preset threshold, the PLC control module will trigger the voice alarm system and send out an alarm signal to prevent the maintenance equipment from getting damp and affecting the maintenance quality. The system adopts an integrated temperature and humidity sensor, and the analog quantity output by it is read and processed by the single-chip microcomputer after A / D analog-to-digital conversion. The measurement data is sent to the PLC for display through the serial interface RS485 bus, and the measurement data is sent to the voice synthesis circuit SYN6288. The synthesized audio signal is amplified by the audio amplifier and broadcast through the speaker.

[0059] A cooling fan is arranged inside the maintenance control box to introduce cold air flow into the cabinet to achieve uniform temperature distribution and prevent the occurrence of local high temperature in the cabinet.

[0060] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A transformer insulating oil leakage inspection and repair device, characterized in that: include: The pressure transmitter module is set at the same height as the transformer insulation oil leakage site to monitor the oil pressure inside the transformer; The vacuum transmitter is installed in the maintenance device to detect the vacuum degree inside the transformer; The vacuum unit is installed in the maintenance device to extract the air that may invade the inside of the transformer during the maintenance process and perform vacuum drying operations on the transformer equipment; Maintenance control box, used to receive detection signals from pressure transmitter module and vacuum transmitter to perform maintenance control on transformer; A condensation tank, an electrical control box, a vacuum pump, a Roots pump and a vacuum transmitter are arranged inside the maintenance control box; a PLC controller, a display screen and buttons are arranged in the electrical control box; an air seepage valve and an air extraction valve are arranged at the bottom of the condensation tank, and the air extraction valve is connected to the air extraction pipeline through an air extraction flange; an air control valve is arranged on the condensation tank; an electric air extraction valve is arranged at the upper end of the condensation tank, and the vacuum pump is connected to the vacuum solenoid valve.

2. A transformer insulating oil leakage inspection and repair device according to claim 1, characterized in that: The pressure transmitter module includes: a pressure transmitter, a first connecting joint, an oil guide pipe, and a second connecting joint; the pressure transmitter is arranged at the same height as the leakage position of the transformer insulating oil, one end of the oil guide pipe is connected to the oil filling valve at the bottom of the transformer oil tank through the first connecting joint, and the other end of the oil guide pipe is connected to the pressure transmitter through the second connecting joint.

3. A transformer insulating oil leakage inspection and repair device according to claim 1, characterized in that: The pressure transmitter is adsorbed on the transformer oil tank shell through a magnet.

4. A transformer insulating oil leakage inspection and repair device according to claim 2, characterized in that: The oil guide pipe adopts a transparent PUN-H-10×2 hose, and the first connecting joint and the second connecting joint are PV-10 quick connectors.

5. A transformer insulating oil leakage inspection and repair device according to claim 1, characterized in that: The vacuum unit includes: a vacuum pump, a Roots pump, a condensing tank, an exhaust pipe, an electric exhaust valve and a gas-controlled valve. The Roots pump and the vacuum pump are connected to the transformer oil tank through the exhaust pipe. The exhaust pipe is connected to the condensing tank. The electric exhaust valve and the gas-controlled valve are arranged on the exhaust pipe.

6. A transformer insulating oil leakage inspection and repair device according to claim 1, characterized in that: The maintenance control box is provided with a box door, and the box door is provided with a window for displaying a display screen and buttons.

7. The transformer insulating oil leakage inspection and repair device according to claim 1, characterized in that: A temperature and humidity sensor is arranged outside the maintenance control box to monitor the temperature and humidity of the maintenance working environment.

8. The transformer insulating oil leakage inspection and repair device according to claim 1, characterized in that: A cooling fan is arranged inside the maintenance control box.

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