Device and method for storing and discharging insulating oil of transformer

Abstract

The invention discloses a transformer insulating oil storage and oil discharge device which comprises an oil storage tank which is of a sealed structure and is used for storing insulating oil; the vacuumizing assembly is arranged on the oil storage tank and can vacuumize the oil storage tank; the dry air generating assembly is arranged on the oil storage tank and can generate dry air to be conveyed into the oil storage tank in a one-way mode. The environment monitoring module can monitor the temperature, humidity and vacuum degree in the oil storage tank; the liquid level monitoring module can monitor the liquid level of insulating oil in the oil storage tank; the oil discharge assembly can discharge insulating oil in the oil storage tank; the control module is connected with the vacuumizing assembly, the dry air generation assembly and the environment monitoring module. The invention further discloses a transformer insulating oil storage and discharge method, automatic oil injection and discharge of the transformer can be achieved, manual operation is reduced, the requirement for high-quality insulating oil in the power transformation overhaul industry is met, and the transformer insulating oil storage and discharge system and method belong to the technical field of transformer maintenance.

Description

Technical Field

[0001] The invention relates to the technical field of transformer maintenance, and in particular to a transformer insulating oil storage and oil discharge device and method. Background Art

[0002] Insulating oil plays a vital role in electrical equipment. Its main function is to isolate live parts with different potentials to avoid short circuits. In addition, insulating oil is also responsible for cooling live equipment. If the coil of a transformer is exposed to the air, it is prone to breakdown during operation. When the transformer coils are filled with insulating oil, the dielectric strength is enhanced, significantly reducing the risk of breakdown. The quality of insulating oil directly affects the safety factor of the equipment, so the insulation performance of insulating oil is one of its main performance indicators.

[0003] In the substation maintenance work, the storage and drainage of transformer insulating oil are key links. At present, the storage method for qualified insulating oil is relatively simple, usually only by simply covering and sealing the storage. This method is difficult to completely isolate the insulating oil from the air, which may cause the oil to return to moisture and the micro-water content to exceed the standard, thus affecting the withstand voltage level. In addition, the existing storage equipment is usually heavy, and the transportation requires forklifts or cranes, which increases the workload. Every maintenance of the transformer also requires oil filtering, which further increases the workload. The independent oil pump currently used for drainage and injection has problems such as complex operation, large workload of oil drainage, and easy contamination of the oil drainage pipeline.

[0004] The current oil filling process is: open the sealing cover, manually extend the oil delivery pipe into the oil storage tank, and then pump the insulating oil into the oil storage tank; the oil filling process is: open the sealing cover, manually extend the oil discharge pipe into the oil storage tank, and then pump the insulating oil out of the oil storage tank; the above process easily causes the oil discharge pipe to be contaminated with insulating oil, and it is impossible to observe the situation of the insulating oil in the oil storage tank. Summary of the invention

[0005] In view of the above shortcomings, the present invention provides a transformer insulating oil storage and oil draining device and method to realize automatic transformer oil filling and draining, reduce manual operations, and meet the demand for high-quality insulating oil in the substation maintenance industry.

[0006] The specific technical solutions are as follows:

[0007] A transformer insulating oil storage and oil discharge device, comprising:

[0008] Oil storage tank, the oil storage tank is a sealed structure, and the oil storage tank is used to store insulating oil;

[0009] A vacuum pumping component, which is arranged on the oil storage tank and can vacuum the oil storage tank;

[0010] A dry air generating assembly is arranged on the oil storage tank and can generate dry air and transport it to the oil storage tank in one direction;

[0011] Environmental monitoring module, which can monitor the temperature, humidity and vacuum degree in the oil storage tank;

[0012] Liquid level monitoring module, the liquid level monitoring module can monitor the liquid level of insulating oil in the oil storage tank;

[0013] The oil drain assembly can drain the insulating oil in the oil storage tank;

[0014] The control module is connected with the vacuum pumping component, the dry air generating component and the environment monitoring module respectively.

[0015] Preferably, the vacuum pump assembly includes a vacuum pump and a vacuum pipe, the oil storage tank is provided with a vacuum hole, and both ends of the vacuum pipe are respectively connected to the vacuum pump and the vacuum hole; the edge of the connection between the vacuum hole and the vacuum pipe is sealed.

[0016] Preferably, the dry air generating assembly includes an air compressor, a filter and a dry air delivery pipe, the air outlet of the air compressor is connected to the air inlet of the filter, the oil storage tank is provided with a dry air input hole, the two ends of the dry air delivery pipe are respectively connected to the air outlet of the filter and the dry air input hole, and the edge of the connection between the dry air delivery pipe and the dry air input hole is sealed.

[0017] Preferably, the environmental monitoring module includes a temperature and humidity monitoring module and a vacuum gauge, both of which are arranged on the oil storage tank. The temperature and humidity monitoring module is used to monitor the temperature and humidity in the oil storage tank, and the vacuum gauge is used to monitor the vacuum degree in the oil storage tank.

[0018] Preferably, the liquid level monitoring module includes a scale, and the oil storage tank is provided with an observation window extending along the height direction of the tank body, and the scale is arranged along the edge of the observation window.

[0019] Preferably, the oil drain assembly includes an oil drain pipe, a ball valve and an oil drain pump. An oil drain hole is provided at the bottom of the side wall of the oil storage tank. One end of the oil drain pipe is connected to the oil drain hole, and the other end of the oil drain pipe is connected to the ball valve. The ball valve is connected to the oil drain pump through a pipe.

[0020] Preferably, the oil storage tank is provided with an oil filling port, and a flow meter is provided at the oil filling port, and the flow meter is used to monitor the flow of the input insulating oil.

[0021] Preferably, the bottom of the oil storage tank is provided with a bottom corner, and the bottom corner is used to support the oil storage tank.

[0022] Preferably, the oil storage tank is made of a high-strength and corrosion-resistant material, and the high-strength and corrosion-resistant material is stainless steel, aluminum alloy or titanium alloy.

[0023] A method for storing and draining transformer insulating oil, the method adopts a transformer insulating oil storage and draining device, and the method comprises the following steps:

[0024] Oil filling stage:

[0025] Before filling oil, check whether the oil tank is sealed;

[0026] After confirming that the oil tank is sealed, open the oil filling port of the oil tank and inject the insulating oil into the oil tank. During the filling process, observe the liquid level of the insulating oil in the oil tank.

[0027] Monitor the temperature, humidity and vacuum degree in the oil storage tank through the environmental monitoring module;

[0028] If the temperature, humidity and vacuum degree in the oil storage tank do not meet the storage environment conditions of the oil storage tank, start the dry air generating component to deliver dry air into the oil storage tank, and at the same time open the exhaust port of the oil storage tank to discharge the humid air in the oil storage tank, and close the exhaust port and the dry air generating component;

[0029] Start the vacuum pumping component to vacuum the oil storage tank;

[0030] Oil drainage stage:

[0031] Connect the oil drain pump and the ball valve, open the ball valve, and start the oil drain pump to drain the insulating oil from the oil storage tank. During the draining process, observe the liquid level of the insulating oil in the oil storage tank.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] 1. The transformer insulating oil storage and oil draining device of the present invention can realize automatic oil filling and oil draining of the transformer, reduce manual operation, and meet the demand for high-quality insulating oil in the substation maintenance industry.

[0034] 2. The transformer insulating oil storage and oil discharge device of the present invention effectively isolates air from entering the oil storage tank by setting the oil storage tank as a sealed structure, avoids contact between the insulating oil and air, and puts the insulating oil in an environment with a trace water content that meets the storage standard, thereby ensuring the dielectric properties of the insulating oil.

[0035] 3. The transformer insulating oil storage and oil discharge device of the present invention has a simple oil discharge process. There is no need to manually hold the oil discharge pipe to punch the oil filling port to extract the insulating oil. It only needs to connect the oil discharge pump to the ball valve and open the ball valve to discharge the insulating oil from the oil storage tank, thereby preventing the oil discharge pipe from being contaminated by the insulating oil.

[0036] 4. The transformer insulating oil storage and oil discharge device of the present invention can conveniently observe the liquid level of the insulating oil in the oil storage tank, ensuring that the amount of insulating oil in the oil storage tank can immerse the coil of the transformer, thereby avoiding breakdown of the transformer during operation.

[0037] 5. The transformer insulating oil storage and oil discharge device of the present invention can automatically monitor the temperature, humidity and vacuum degree in the oil storage tank, eliminating the need for manual monitoring during the oil filling process, thereby improving the oil filling efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. In all drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn according to the actual scale.

[0039] Figure 1 The present invention is a three-dimensional diagram of a transformer insulating oil storage and oil discharge device.

[0040] Among them, 1 is the oil storage tank, 2 is the ball valve, 3 is the vacuum gauge, 4 is the vacuum pumping component, 5 is the liquid level monitoring module, 6 is the dry air generating component, 7 is the oil filling port, 8 is the exhaust port, 9 is the temperature and humidity monitoring module, 10 is the control module, 11 is the bottom corner, and 12 is the box cover. DETAILED DESCRIPTION

[0041] The technical scheme in the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiment of the present invention. Obviously, the described embodiment is only a part of the embodiment of the present invention, not all of the embodiments. Based on the embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They 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 direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0043] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If the terms "first", "second", "third" are described, they are only used for the purpose of description and distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0044] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0045] Example 1

[0046] like Figure 1 As shown, the present embodiment provides a transformer insulating oil storage and oil discharge device, comprising:

[0047] Oil storage tank 1, which is a sealed structure and is used to store insulating oil;

[0048] A vacuum pumping component 4, which is arranged on the oil storage tank 1, and can vacuum the oil storage tank 1;

[0049] A dry air generating assembly 6, the dry air generating assembly 6 is arranged on the oil storage tank 1, and the dry air generating assembly 6 can generate dry air and transport it to the oil storage tank 1 in one direction;

[0050] Environmental monitoring module, the environmental monitoring module can monitor the temperature, humidity and vacuum degree in the oil storage tank 1; the environmental monitoring module can use an ESP8266 Wi-Fi module, and the temperature and humidity monitoring system based on the STM32 microcontroller and the ESP8266 Wi-Fi module can realize real-time monitoring and remote transmission of environmental temperature and humidity;

[0051] A liquid level monitoring module 5, which can monitor the liquid level of the insulating oil in the oil storage tank 1;

[0052] An oil drain assembly, which can drain the insulating oil in the oil storage tank 1;

[0053] The control module 10 is connected to the vacuum pumping component 4, the dry air generating component 6 and the environment monitoring module respectively. The controller can be an STM32 microcontroller. The controller receives the vacuum, temperature and humidity data monitored by the vacuum meter 3 and the temperature and humidity monitoring module 9, and then compares them with the vacuum, temperature and humidity threshold ranges preset by the controller. According to the comparison result, it is determined whether the environment in the oil storage tank 1 meets the requirements for storing insulating oil, and then the controller controls the vacuum pumping component 4 and the dry air generating component 6 to adjust the environment in the oil storage tank 1.

[0054] The vacuum assembly 4 includes a vacuum pump and a vacuum pipe. The oil storage tank 1 is provided with a vacuum hole. Both ends of the vacuum pipe are connected to the vacuum pump and the vacuum hole respectively. The edge of the connection between the vacuum hole and the vacuum pipe is sealed.

[0055] The dry air generating assembly 6 includes an air compressor, a filter and a dry air delivery pipe. The air outlet of the air compressor is connected to the air inlet of the filter. The oil storage tank 1 is provided with a dry air input hole. The two ends of the dry air delivery pipe are respectively connected to the air outlet of the filter and the dry air input hole. The edge of the connection between the dry air delivery pipe and the dry air input hole is sealed. The air compressor can be a screw oil-free air compressor, and the filter is a dry filter, which can be composed of hygroscopic materials such as molecular sieves, activated alumina or anhydrous calcium chloride.

[0056] The environmental monitoring module includes a temperature and humidity monitoring module 9 and a vacuum meter 3. Both the temperature and humidity monitoring module 9 and the vacuum meter 3 are arranged on the oil storage tank 1. The temperature and humidity monitoring module 9 is used to monitor the temperature and humidity in the oil storage tank 1, and the vacuum meter 3 is used to monitor the vacuum degree in the oil storage tank 1. The temperature and humidity monitoring module 9 can adopt DHT11, DHT22, AM2301, etc., and the appropriate model is selected according to specific needs. DHT11 is a common digital temperature and humidity sensor with high precision, fast response and stability, which is suitable for environmental monitoring. In addition, there is a digital temperature and humidity sensor based on MEMS humidity-sensitive capacitor technology, which is small in size, high in precision and low in power consumption, and is suitable for applications such as thermostats. The temperature and humidity monitoring module 9 is usually composed of a temperature and humidity sensor, a data collector, a display device, and a communication module. It can monitor the changes in environmental temperature and humidity in real time, and transmit the data to the cloud or controller by wireless or wired means to realize remote monitoring and data analysis. The vacuum meter 3 is an instrument for measuring vacuum or air pressure, which is usually used in scientific research and industrial production. The working principle of the vacuum gauge 3 is to determine the air pressure by measuring the change of the physical effect of the gas under different pressures, and convert it into the value of vacuum degree or absolute pressure. The vacuum gauge 3 can be divided into mechanical and electronic types, wherein the mechanical vacuum gauge 3 uses mechanical parts such as levers and gear mechanisms to display the vacuum degree, while the electronic vacuum gauge 3 provides accurate readings through sensors and digital display technology. The vacuum gauge 3 of this embodiment adopts the electronic vacuum gauge 3.

[0057] The liquid level monitoring module 5 includes a scale, and the oil storage tank 1 is provided with an observation window extending along the height direction of the tank body, and the scale is arranged along the edge of the observation window. Specifically, the observation window can be provided with a strip through hole on the side wall of the oil storage tank 1 to connect the inside and outside of the oil storage tank 1, and a transparent material plate, such as an acrylic plate, is provided at the strip through hole for sealing, and the scale is fixed to the outer wall of the oil storage tank 1.

[0058] The oil discharge assembly includes an oil discharge pipe, a ball valve 2 and an oil discharge pump. An oil discharge hole is provided at the bottom of the side wall of the oil storage tank 1. One end of the oil discharge pipe is connected to the oil discharge hole, and the other end of the oil discharge pipe is connected to the ball valve 2. The ball valve 2 is connected to the oil discharge pump through a pipe. By arranging the oil discharge assembly to be connected to the bottom of the side wall of the oil storage tank 1, the complicated operation of manually extending the oil discharge pipe from the tank cover 12 of the oil storage tank 1 into the oil storage tank 1 to discharge the oil is solved in the existing oil discharge method, and the oil discharge pipe is prevented from being contaminated by insulating oil when it is extended into the oil storage tank 1.

[0059] The oil storage tank 1 is provided with an oil filling port 7, and a flow meter is provided at the oil filling port 7, and the flow meter is used to monitor the flow rate of the input insulating oil. Specifically, the oil filling port 7 can be connected to a ball valve 2, and when not in use, the oil filling port 7 of the oil storage tank 1 can be sealed. The flow meter can be a digital hydraulic oil flow meter.

[0060] The bottom of the oil storage tank 1 is provided with a bottom corner 11, which is used to support the oil storage tank 1. By providing the bottom corner 11, the bottom of the oil storage tank 1 is suspended, and during the oil discharge process, the pollutants leaked from the oil storage tank 1 can also be cleaned when they flow into the bottom of the oil storage tank 1.

[0061] The oil storage tank 1 is made of high-strength and corrosion-resistant materials, and the high-strength and corrosion-resistant materials are stainless steel, aluminum alloy or titanium alloy. Stainless steel exhibits good corrosion resistance in a variety of environments, especially in weak alkali and neutral chloride aqueous solution environments. Aluminum alloys such as Al-Zn-Mg-Cu alloys significantly improve the strength and corrosion resistance of the alloy by adding elements such as Co, Ni and Zr. Titanium alloys have good corrosion resistance, especially in environments containing chloride ions. By making the oil storage tank 1 of high-strength and corrosion-resistant materials and designing it as a sealed structure, it is ensured that the insulating oil is not affected by the outside air during storage. A structure that conforms to the flow of fluid can be designed inside the oil storage tank 1, which conforms to the principles of fluid mechanics, to ensure smooth flow of oil and avoid accumulation and precipitation.

[0062] The sealing of the connection between the pipeline and the oil storage tank 1 in this embodiment can be achieved by gluing and connecting with glue or adhesive. This connection method can form a firm connection, ensure sealing, and has low cost. During operation, it is necessary to select a suitable glue or adhesive, and ensure that the surface of the pipeline and the box is clean and dry so that the glue or adhesive can fully play its role. Of course, if the pipeline is a PP-R pipe, PB pipe, etc., a hot melt connection can be used. This connection method heats the end of the pipeline to the melting point and then inserts the connection, which has high connection strength and long service life. If the pipeline is a metal pipeline, such as a steel pipe, welding sealing can be used.

[0063] Example 2

[0064] This embodiment provides a transformer insulating oil storage and oil discharge method, the method uses a transformer insulating oil storage and oil discharge device, the method includes the following steps:

[0065] Oil filling stage:

[0066] Before filling the oil, check whether the oil tank 1 is sealed;

[0067] After confirming that the oil storage tank 1 is sealed, open the oil filling port 7 of the oil storage tank 1 and inject the insulating oil into the oil storage tank 1. During the oil filling process, observe the liquid level of the insulating oil in the oil storage tank 1.

[0068] Monitor the temperature, humidity and vacuum degree in the oil storage tank 1 through the environmental monitoring module;

[0069] If the temperature, humidity and vacuum degree in the oil storage tank 1 do not meet the storage environment conditions of the oil storage tank 1, the dry air generating assembly 6 is started to deliver dry air into the oil storage tank 1, and at the same time, the exhaust port 8 of the oil storage tank 1 is opened to discharge the humid air in the oil storage tank 1, and the exhaust port 8 and the dry air generating assembly 6 are closed;

[0070] Start the vacuum pumping component 4 to perform vacuum pumping on the oil storage tank 1;

[0071] It should be noted that the specific process of the oil injection stage is as follows:

[0072] Inspection and preparation: Before filling the oil, the oil tank 1 and the corresponding equipment must be inspected to ensure that they are intact and without any leakage. At the same time, the capacity and type of the insulating oil in the oil tank 1 need to be checked, and sufficient insulating oil must be prepared.

[0073] Cleaning the transformer: Clean the outer shell of the oil storage tank 1 to prevent impurities from entering the insulating oil. Cleaning can be done with a cleaning agent and a soft brush.

[0074] Connecting the oil tank: Connect the insulating oil delivery pipe or pump to the oil storage tank 1 to inject the insulating oil into it.

[0075] Prepare insulating oil: Ensure that the temperature, humidity, vacuum and cleanliness of the insulating oil meet the requirements. At the same time, filter the insulating oil to remove impurities and moisture.

[0076] Start filling oil: open the filling port 7 of the oil storage tank 1, and slowly fill the insulating oil into the oil storage tank 1. During the filling process, attention should be paid to the filling speed, and it is best to choose a gradually increasing method to avoid bubbles or excessive pressure.

[0077] Monitoring and control: During the oil filling process, monitor the oil temperature, oil level and oil pressure, and adjust the oil filling speed and pressure according to the situation. At the same time, regularly check the humidity and impurity content of the insulating oil.

[0078] Complete oil filling: When the insulating oil completely fills the oil storage tank 1 and reaches the required oil level, stop filling the oil. Make sure the ball valve 2 is closed and remove the oil filling pipe and oil drain pump.

[0079] Cleaning and maintenance: After the oil filling is completed, clean the outer shell of the oil storage tank 1 to keep it clean. At the same time, regularly check and maintain the oil storage tank 1 and the insulating oil system to ensure their normal operation and extend their service life.

[0080] Oil drainage stage:

[0081] Connect the oil drain pump and the ball valve 2, open the ball valve 2, and start the oil drain pump to drain the insulating oil from the oil storage tank 1. During the oil draining process, observe the liquid level of the insulating oil in the oil storage tank 1.

[0082] Specific process:

[0083] Arrange protective facilities: Lay leak-proof mats in the working area where the oil in the oil storage tank 1 is handled, and install barriers to prevent sediment splashing to protect the environment and workers.

[0084] Connect the oil drain pump and ball valve 2 to ensure that the oil can be discharged smoothly.

[0085] Drain the oil: Open the valve of the oil drain pipe to allow the insulating oil to start draining. During this process, the oil drain pump can be slowly started to accelerate the discharge of the insulating oil and ensure that the pollutants in the oil storage tank 1, including moisture, solid particles, etc., are drained as much as possible.

[0086] Cleaning up waste oil: After discharge, clean and package the discharged waste oil and place it at a designated location for treatment or recycling in compliance with relevant regulations and environmental standards.

[0087] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A transformer insulating oil storage and oil discharge device, characterized in that: include: Oil storage tank, the oil storage tank is a sealed structure, and the oil storage tank is used to store insulating oil; A vacuum pumping component, which is arranged on the oil storage tank and can vacuum the oil storage tank; A dry air generating assembly is arranged on the oil storage tank and can generate dry air and transport it to the oil storage tank in one direction; Environmental monitoring module, which can monitor the temperature, humidity and vacuum degree in the oil storage tank; Liquid level monitoring module, the liquid level monitoring module can monitor the liquid level of insulating oil in the oil storage tank; The oil drain assembly can drain the insulating oil in the oil storage tank; The control module is connected with the vacuum pumping component, the dry air generating component and the environment monitoring module respectively.

2. A transformer insulating oil storage and oil discharge device according to claim 1, characterized in that: The vacuum pump assembly includes a vacuum pump and a vacuum pump pipe. The oil storage tank is provided with a vacuum pump hole. Both ends of the vacuum pump pipe are respectively connected to the vacuum pump and the vacuum pump hole. The edge of the connection between the vacuum pump hole and the vacuum pump pipe is sealed.

3. A transformer insulating oil storage and oil discharge device according to claim 1, characterized in that: The dry air generating assembly includes an air compressor, a filter and a dry air delivery pipe. The air outlet of the air compressor is connected to the air inlet of the filter. The oil storage tank is provided with a dry air input hole. The two ends of the dry air delivery pipe are respectively connected to the air outlet of the filter and the dry air input hole. The edge of the connection between the dry air delivery pipe and the dry air input hole is sealed.

4. A transformer insulating oil storage and draining device according to claim 1, characterized in that: The environmental monitoring module includes a temperature and humidity monitoring module and a vacuum gauge. Both the temperature and humidity monitoring module and the vacuum gauge are arranged on the oil storage tank. The temperature and humidity monitoring module is used to monitor the temperature and humidity in the oil storage tank, and the vacuum gauge is used to monitor the vacuum degree in the oil storage tank.

5. A transformer insulating oil storage and oil discharge device according to claim 1, characterized in that: The liquid level monitoring module comprises a scale, an observation window extending along the height direction of the tank body is arranged on the oil storage tank, and the scale is arranged along the edge of the observation window.

6. A transformer insulating oil storage and oil discharge device according to claim 1, characterized in that: The oil drain assembly includes an oil drain pipe, a ball valve and an oil drain pump. An oil drain hole is provided at the bottom of the side wall of the oil storage tank. One end of the oil drain pipe is connected to the oil drain hole, and the other end of the oil drain pipe is connected to the ball valve. The ball valve is connected to the oil drain pump through a pipe.

7. A transformer insulating oil storage and draining device according to claim 1, characterized in that: The oil storage tank is provided with an oil filling port, at which a flow meter is provided, and the flow meter is used to monitor the flow of the input insulating oil.

8. The transformer insulating oil storage and oil discharge device according to claim 1, characterized in that: The bottom of the oil storage tank is provided with a bottom corner, and the bottom corner is used for supporting the oil storage tank.

9. A transformer insulating oil storage and draining device according to claim 1, characterized in that: The oil storage tank is made of high-strength and corrosion-resistant materials, and the high-strength and corrosion-resistant materials are stainless steel, aluminum alloy or titanium alloy.

10. A method for storing and draining transformer insulating oil, characterized in that: The method adopts a transformer insulating oil storage and oil discharge device according to any one of claims 1 to 9, and the method comprises the following steps: Oil filling stage: Before filling oil, check whether the oil tank is sealed; After confirming that the oil tank is sealed, open the oil filling port of the oil tank and inject the insulating oil into the oil tank. During the filling process, observe the liquid level of the insulating oil in the oil tank. Monitor the temperature, humidity and vacuum degree in the oil storage tank through the environmental monitoring module; If the temperature, humidity and vacuum degree in the oil storage tank do not meet the storage environment conditions of the oil storage tank, start the dry air generating component to deliver dry air into the oil storage tank, and at the same time open the exhaust port of the oil storage tank to discharge the humid air in the oil storage tank, and close the exhaust port and the dry air generating component; Start the vacuum pumping component to vacuum the oil storage tank; Oil drainage stage: Connect the oil drain pump and the ball valve, open the ball valve, and start the oil drain pump to drain the insulating oil from the oil storage tank. During the draining process, observe the liquid level of the insulating oil in the oil storage tank.

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