An oil reservoir, device and system for automatic oil withdrawal from a transformer

Abstract

This invention discloses an oil tank, a device and system for automatically extracting oil from a transformer, relating to the field of transformer oil sampling technology. The oil tank includes a shell, a boss, an oil storage tank, an oil injection tank, an oil injection film, a vent, and a core. The core slides against the inner wall of the shell. The oil injection film and the vent are fixed to the shell. The oil injection film is used for an external needle to pierce the oil injection tank through the oil injection film. The device includes a storage cabinet, a controller, an oil injection electric actuator, a needle, and a first pump. The oil injection electric actuator is fixed to the storage cabinet. The needle is fixedly connected to the free end of the oil injection electric actuator. The first pump is used to connect the transformer to the needle. The controller is connected to the control terminals of the storage cabinet, the oil injection electric actuator, and the first pump. The needle is used to pierce the oil injection tank through the oil injection film of the oil tank. The system includes an automatic oil extraction device and an oil tank, with the oil tank located inside the storage cabinet. Through the oil tank, storage cabinet, controller, oil injection electric actuator, needle, and first pump, it achieves high efficiency in extracting oil from the transformer.

Description

Technical Field

[0001] This invention relates to the field of transformer oil sampling technology, and more particularly to an oil tank, a device and system for automatically extracting oil from a transformer. Background Technology

[0002] The author conducted a search using the formula (TACD = (transformer AND oil sample AND (storage OR cavity) AND membrane)) and obtained the following closest existing technical solutions.

[0003] The authorization announcement number is CN109211309B, and the name is "Integrated Online Monitoring Device for Dissolved Hydrogen, Micro-water, and Oil Pressure in Oil-filled Equipment." It includes a hydrogen-micro-water integrated sensor, a pressure sensor, a base, an adapter, a signal conditioning unit, and a main control unit. The hydrogen-micro-water integrated sensor is installed at the bottom of the adapter and is sealed to the oil intake port of the oil-filled equipment. The adapter has an oil outlet port, which communicates with the oil intake port. The top of the adapter is sealed to the base. An oil storage chamber is set inside the base, and a pressure oil inlet port is set at the bottom of the base. One end of the pressure oil inlet port communicates with the oil outlet port, and the other end communicates with the oil storage chamber. The pressure sensor is installed on the base. The sensor is sequentially connected to the signal conditioning unit and the main control unit. This device enables online monitoring of hydrogen, micro-water, and oil pressure in oil-filled equipment, and diagnoses the insulation status of the equipment through online monitoring data. Compared with traditional monitoring methods, the online monitoring device has advantages such as no power outage required, rich monitoring information, and real-time monitoring and diagnosis.

[0004] Application publication number CN111855482A, entitled "A Detection Device for Dissolved Hydrogen in Transformer Oil," comprises: a hydrogen detection module, a first three-way valve, a circulating gas pump, a second three-way valve, an oil degassing module, a circulating gas chamber, a main control circuit, and an interactive host. The oil degassing module is connected to the gas sampling port of the electrical equipment under test via a gas pipeline, and is also connected to the hydrogen detection module and the circulating gas chamber via the gas pipeline, the first three-way valve, the second three-way valve, and the circulating gas pump. Controlling the first and second three-way valves allows the oil degassing module to be connected only to the hydrogen detection module or the circulating gas chamber. Each module is controlled by the main control circuit. The main control circuit is connected to the interactive host via a signal line, receiving commands from the interactive host and sending detection results to the interactive host.

[0005] Based on the two patent documents mentioned above and existing technical solutions, the inventors analyze the existing technical solutions as follows.

[0006] According to the "Condition-Based Maintenance and Testing Procedures for Power Transmission and Transformation Equipment," oil samples must be taken from the transformer (i.e., the parallel reactor) for analysis periodically and when the transformer is operating abnormally. However, in recent years, UHV transformer failures have occurred frequently, and the oil sampling process carries safety risks.

[0007] Existing oil sampling robots for ultra-high voltage transformers are unable to accurately locate the oil sampling position due to strong electromagnetic interference around the transformer, resulting in automatic oil sampling failure.

[0008] Existing technical issues and considerations:

[0009] How to solve the technical problem of poor oil extraction efficiency from transformers. Summary of the Invention

[0010] This invention provides an oil tank, a device and system for automatically extracting oil from a transformer, and solves the technical problem of poor oil extraction efficiency from a transformer.

[0011] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0012] An oil reservoir includes a shell, a boss, an oil storage tank, an oil injection tank, an oil injection film, a vent, and a core. The boss, oil storage tank, and oil injection tank are located inside the shell. The boss is fixedly connected to the inner wall of the shell. The first side of the boss and the inner wall of the shell form an oil storage tank, and the second side of the boss and the inner wall of the shell form an oil injection tank. The oil storage tank and the oil injection tank are connected and communicate with each other to form a cavity. The core is located inside the cavity and slides with the inner wall of the shell. The oil injection film and the vent are fixed on the shell. The cavity is connected and communicates with the outside through the vent. The oil injection film is used for external needles to pierce the oil injection tank through the oil injection film.

[0013] A further technical solution is that the oil storage tank, the oil injection tank, and the oil injection film are distributed sequentially from bottom to top, the top of the core overlaps with the oil injection film, the bottom of the core overlaps with the bottom of the shell, and the core slides in the horizontal direction.

[0014] A further technical solution is that the core is used when oil enters through the oil filling tank, and the entering oil pushes the core, thus the oil enters the oil storage tank.

[0015] An apparatus for automatically extracting oil from a transformer includes a storage cabinet for ejecting stored material according to instructions, a controller, an oil injection actuator, a needle, and a first pump. The oil injection actuator is fixed to the storage cabinet, the needle is fixedly connected to the free end of the oil injection actuator, the first pump connects the transformer to the needle, the controller is connected to the control terminal of the storage cabinet, the controller is connected to the control terminal of the oil injection actuator, and the controller is connected to the control terminal of the first pump. The stored material is the aforementioned oil reservoir, and the needle is used to pierce the oil reservoir through the oil injection film to inject oil from the transformer into the oil reservoir. After injection, the needle is withdrawn from the oil reservoir.

[0016] A further technical solution includes a slide rail connected to the storage cabinet, which is used to retrieve and transport items pushed out of the storage cabinet.

[0017] A further technical solution includes an electric conveying device, wherein the control terminal of the controller is connected to the control terminal of the electric conveying device, and the electric conveying device is used to obtain and convey the stored items transferred from the slide.

[0018] A further technical solution includes an oil tank platform, which is used to receive the stored goods conveyed from the electric conveyor.

[0019] A further technical solution includes a second pump and a waste oil tank. The second pump is used to connect the transformer to the waste oil tank, and the controller is connected to the control terminal of the second pump.

[0020] A system for automatically extracting oil from a transformer includes the aforementioned automatic oil extraction device, and also includes an oil tank located inside a storage cabinet.

[0021] A further technical solution includes a transformer and a first oil pipe, with the transformer, the first oil pipe, and the needle connected in sequence. A first pump is fixedly connected to the first oil pipe, and the transformer is used to pump oil from the transformer into the needle via the first oil pipe and the first pump.

[0022] The beneficial effects of adopting the above technical solution are as follows:

[0023] First, an oil reservoir includes a shell, a boss, an oil storage tank, an oil injection tank, an oil injection film, a vent, and a core. The boss, oil storage tank, and oil injection tank are located inside the shell. The boss is fixedly connected to the inner wall of the shell. A first side of the boss and the inner wall of the shell form an oil storage tank, and a second side of the boss and the inner wall of the shell form an oil injection tank. The oil storage tank and the oil injection tank are connected and interconnected, forming a cavity. The core is located inside the cavity and slides against the inner wall of the shell. The oil injection film and the vent are fixed to the shell. The cavity is connected to the outside through the vent. The oil injection film is used for external needles to pierce the oil injection tank. This technical solution, through the oil reservoir formed by the shell, boss, oil storage tank, oil injection tank, oil injection film, vent, and core, provides a foundation for improving the oil extraction efficiency of transformers.

[0024] Secondly, a device for automatically extracting oil from a transformer includes a storage cabinet for ejecting stored oil according to instructions. It also includes a controller, an oil injection actuator, a needle, and a first pump. The oil injection actuator is fixed to the storage cabinet, and the needle is fixedly connected to the free end of the actuator. The first pump connects the transformer to the needle. The controller is connected to the control terminals of the storage cabinet, the oil injection actuator, and the first pump. The stored oil is the aforementioned oil reservoir. The needle is used to pierce the oil reservoir through its injection film, injecting oil from the transformer into the reservoir. After injection, the needle is withdrawn from the reservoir. This technical solution, through the storage cabinet, controller, oil injection actuator, needle, and first pump, provides a foundation for improving the oil extraction efficiency of transformers.

[0025] Third, a system for automatically extracting oil from a transformer includes the aforementioned automatic oil extraction device, and also includes an oil tank located inside a storage cabinet. This technical solution achieves high efficiency in extracting oil from the transformer through the oil tank, storage cabinet, controller, oil injection electric actuator, needle, and first pump.

[0026] See the detailed implementation section for further description. Attached Figure Description

[0027] Figure 1 This is a structural diagram of Embodiment 1 of the present invention;

[0028] Figure 2 This is a structural diagram of Embodiment 2 of the present invention;

[0029] Figure 3 This is a principle block diagram of Embodiment 2 of the present invention;

[0030] Figure 4 This is a principle block diagram of Embodiment 3 of the present invention.

[0031] in:

[0032] 1. Shell;

[0033] 2 bosses;

[0034] 3 oil storage tanks;

[0035] 4 oil tanks;

[0036] 5. Apply oil film;

[0037] 6 vents;

[0038] 7-core;

[0039] 8. First electric propulsion;

[0040] 9 needles;

[0041] 10 slides;

[0042] 11 conveyor belts;

[0043] 12 oil tank platforms;

[0044] 13. First metering pump;

[0045] 14. Second metering pump;

[0046] 15 Second Electric Propulsion;

[0047] 16 pallets;

[0048] 17 springs;

[0049] 18 oil tank rooms;

[0050] 19 waste oil drums;

[0051] 20 First oil pipeline;

[0052] 21. Second oil pipe;

[0053] 22 Transformers;

[0054] 23 First oil depot;

[0055] 24. Second oil tank;

[0056] 25. Third oil depot;

[0057] 26. Fourth oil tank. Detailed Implementation

[0058] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this application or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0059] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0060] Example 1:

[0061] like Figure 1 As shown, the present invention discloses an oil reservoir comprising a shell 1, a boss 2, an oil storage tank 3, an oil injection tank 4, an oil injection film 5, an exhaust port 6, and a core 7. The boss 2, the oil storage tank 3, and the oil injection tank 4 are located inside the shell 1. The boss 2 is fixedly connected to the inner wall of the shell 1. The first side of the boss 2 and the inner wall of the shell 1 form the oil storage tank 3, and the second side of the boss 2 and the inner wall of the shell 1 form the oil injection tank 4. The oil storage tank 3 and the oil injection tank 4 are connected and communicate with each other to form a cavity. The core 7 is located inside the cavity and is slidably fitted with the inner wall of the shell 1. The oil injection film 5 and the exhaust port 6 are fixed on the shell 1. The cavity is connected and communicated with the outside through the exhaust port 6. The oil injection film 5 is used for external needles to pierce the oil injection tank 4 through the oil injection film 5.

[0062] like Figure 1 As shown, the oil storage tank 3, the oil injection tank 4, and the oil injection film 5 are distributed from bottom to top. The top of the core 7 overlaps with the oil injection film 5, and the bottom of the core 7 overlaps with the bottom of the shell 1. The core 7 slides in the horizontal direction.

[0063] like Figure 1 As shown, the core 7 is used when oil enters through the oil filling tank 4. The oil entering pushes the core 7, and then the oil enters the oil storage tank 3.

[0064] Example 2:

[0065] like Figure 2 and Figure 3 As shown, the present invention discloses a device for automatically extracting oil from a transformer, comprising a controller, a storage cabinet, an oil injection electric pusher, a needle 9, a slide rail 10, an electric conveying device, an oil tank platform 12, a first pump, a second pump, a waste oil tank 19, a first oil pipe 20, and a second oil pipe 21. The storage cabinet is used to push out the stored material according to the instruction, and the stored material is the oil tank in Example 1.

[0066] like Figure 2 As shown, the oil injection electric propeller is the first electric propeller 8, the electric transmission device is the conveyor belt 11, the first pump is the first metering pump 13, and the second pump is the second metering pump 14.

[0067] like Figure 2 As shown, the storage cabinet includes a cabinet body, a second electric actuator 15, a tray plate 16, and a spring 17. The second electric actuator 15, tray plate 16, and spring 17 are all located inside the cabinet body. The second electric actuator 15 is fixedly connected to the cabinet body. One end of the spring 17 is fixedly connected to the cabinet body, and the other end of the spring 17 is fixedly connected to the tray plate 16. The area enclosed by the cabinet body, tray plate 16, and spring 17 is an oil tank chamber 18, which is used to accommodate multiple oil tanks. The second electric actuator 15 is used to push out the stored oil tank (i.e., the oil tank being injected) according to instructions, so as to inject oil into the next oil tank. The storage cabinet itself is prior art and will not be described in detail. The inventive point lies in the structural combination of the oil injection electric actuator, the needle 9, and the storage cabinet.

[0068] like Figure 2 As shown, the first electric actuator 8 is fixed on the top outside of the storage cabinet, the needle 9 is fixedly connected to the free end of the first electric actuator 8, the first oil pipe 20 is used to connect the transformer 22 to the needle 9, the first metering pump 13 is fixedly connected to the first oil pipe 20, the first metering pump 13 is used to connect the transformer 22 to the needle 9, the needle 9 is used to pierce the oil injection tank 4 through the oil injection film 5 of the cabinet and the oil tank, inject the oil in the transformer 22 into the oil injection tank 4, and after the injection is completed, it is pulled out from the oil tank.

[0069] like Figure 2 As shown, the second oil pipe 21 is used to connect the transformer 22 to the waste oil tank 19, and the second metering pump 14 is fixedly connected to the second oil pipe 21.

[0070] like Figure 2 As shown, the slide 10 is fixedly connected to the storage cabinet and is used to retrieve the stored items pushed out of the storage cabinet and transfer them to the conveyor belt 11.

[0071] like Figure 2 As shown, the conveyor belt 11 is located below the outlet of the slide 10. The conveyor belt 11 is used to obtain the storage from the slide 10 and convey it to the oil tank platform 12.

[0072] like Figure 2 As shown, the oil tank platform 12 is connected to the conveyor belt 11, and the oil tank platform 12 is used to obtain the storage material conveyed from the conveyor belt 11.

[0073] like Figure 3 As shown, the controller is electrically connected to the control terminal of the first electric pusher 8, the controller is electrically connected to the control terminal of the second electric pusher 15 of the storage cabinet, the controller is electrically connected to the control terminal of the first metering pump 13, the controller is electrically connected to the control terminal of the second metering pump 14, and the control terminal of the controller is electrically connected to the control terminal of the conveyor belt 11.

[0074] Among them, the controller is a single-chip microcomputer, the electric actuator is an electric push rod, and the controller, electric actuator, storage cabinet, pump and conveyor belt themselves, as well as the corresponding communication connection technology, are existing technologies and will not be described in detail here.

[0075] Instructions for use of Example 2:

[0076] like Figure 2 As shown, the first oil pipe 20 is connected to the transformer 22 for conduction, and the second oil pipe 21 is connected to the first oil pipe 20 for conduction.

[0077] like Figure 2 As shown, multiple oil tanks, namely the first oil tank 23, the second oil tank 24, the third oil tank 25, and the fourth oil tank 26, are placed in a storage cabinet. The first oil tank 23 is filled with oil and then pushed out, conveyed to the oil tank platform 12, where the robot can obtain the oil. The second oil tank 24 is pushed to the top of the oil tank chamber 18 by a spring 17, ready for the next step of filling.

[0078] Example 3:

[0079] The difference between Example 3 and Example 2 is that the conveyor belt is removed.

[0080] like Figure 4 As shown, the present invention discloses a device for automatically extracting oil from a transformer, comprising a controller, a storage cabinet, an oil injection electric actuator, a needle, a slide, an oil tank platform, a first pump, a second pump, a waste oil tank, a first oil pipe, and a second oil pipe. The storage cabinet is used to push out the stored material according to the instruction, and the stored material is the oil tank in Example 1.

[0081] The oil injection electric propeller is the first electric propeller, the first pump is the first metering pump, and the second pump is the second metering pump.

[0082] The storage cabinet includes a cabinet body, a second electric actuator, a tray plate, and springs. The second electric actuator, tray plate, and springs are all located inside the cabinet body. The second electric actuator is fixedly connected to the cabinet body, one end of the spring is fixedly connected to the cabinet body, and the other end of the spring is fixedly connected to the tray plate. The area enclosed by the cabinet body, tray plate, and springs is an oil reservoir chamber, which holds multiple oil reservoirs. The second electric actuator is used to push out the stored oil reservoir (i.e., the one being injected with oil) according to instructions, so that the next oil reservoir can be filled. The storage cabinet itself is existing technology and will not be described in detail. The inventive point lies in the structural combination of the oil injection actuator, the needle, and the storage cabinet.

[0083] The first electric actuator is fixed on the top outside of the storage cabinet. The needle is fixedly connected to the free end of the first electric actuator. The first oil pipe is used to connect the transformer to the needle. The first metering pump is fixedly connected to the first oil pipe. The first metering pump is used to connect the transformer to the needle. The needle is used to pierce the oil injection tank through the oil injection film of the cabinet and the oil tank to inject the oil in the transformer into the oil injection tank. After the injection is completed, the needle is pulled out from the oil tank.

[0084] The second oil pipe is used to connect the transformer to the waste oil drum, and the second metering pump is fixedly connected to the second oil pipe.

[0085] The slide is fixedly connected to the storage cabinet. The slide is used to retrieve the stored items pushed out of the storage cabinet and transfer them to the oil tank platform.

[0086] The oil tank platform is located below the exit of the slide. The oil tank platform overlaps with the slide and is used to obtain the storage material transferred from the slide.

[0087] like Figure 4 As shown, the controller is electrically connected to the control terminal of the first electric pusher, the controller is electrically connected to the control terminal of the second electric pusher of the storage cabinet, the controller is electrically connected to the control terminal of the first metering pump, and the controller is electrically connected to the control terminal of the second metering pump.

[0088] The controller is a microcontroller, the electric actuator is an electric push rod, and the controller, electric actuator, storage cabinet and pump itself, as well as the corresponding communication connection technology, are existing technologies and will not be described in detail here.

[0089] Instructions for use of Example 3:

[0090] Connect the first oil pipe to the transformer and make it conductive, and connect the second oil pipe to the first oil pipe and make it conductive.

[0091] Multiple oil tanks, designated as the first, second, third, and fourth oil tanks, are stored in a storage cabinet. The first oil tank is filled with oil and then pushed out, conveyed via a slide to the oil tank platform, where the robot can access the oil. The second oil tank is pushed to the top of the oil tank chamber by a spring, ready for the next step of filling.

[0092] Example 4:

[0093] Example 4 differs from Example 2 in that it also includes a transformer 22 and the oil tank of Example 1.

[0094] The present invention discloses a system for automatically extracting oil from a transformer, including the apparatus of Embodiment 2, and further including a transformer 22 and an oil tank of Embodiment 1. The transformer 22, the first oil pipe 20 and the needle 9 are sequentially connected and conductive. The first metering pump 13 is fixedly connected to the first oil pipe 20. The transformer 22 is used to draw oil from the transformer 22 into the needle 9 through the first oil pipe 20 and the first metering pump 13.

[0095] The oil tanks are pre-placed in a storage cabinet. There are multiple oil tanks, designated as first oil tank 23, second oil tank 24, third oil tank 25, and fourth oil tank 26. First oil tank 23 is filled with oil and then pushed out, conveyed to oil tank platform 12, where the robot can retrieve the oil. Second oil tank 24 is pushed to the top of oil tank chamber 18 by spring 17, ready for the next step of filling.

[0096] Compared to the above embodiments, the first electric actuator can also be fixed inside the storage cabinet, the needle is fixedly connected to the free end of the first electric actuator, the first metering pump is used to connect the transformer and the needle, and the needle is used to pierce the oil filling tank through the oil filling film of the oil tank, without the need to drill holes in the cabinet to allow the needle to pass through the cabinet.

[0097] Example 5:

[0098] Example 5 differs from Example 3 in that it also includes a transformer and the oil tank of Example 1.

[0099] The present invention discloses a system for automatically extracting oil from a transformer, including the apparatus of embodiment 3, and further including a transformer and an oil tank of embodiment 1. The transformer, a first oil pipe and a needle are sequentially connected and conductive. A first metering pump is fixedly connected to the first oil pipe. The transformer is used to draw oil from the transformer into the needle through the first oil pipe and the first metering pump.

[0100] The oil tanks are pre-placed in a storage cabinet. There are multiple oil tanks, designated as the first, second, third, and fourth oil tanks. The first oil tank is filled with oil and then pushed out, conveyed to the oil tank platform so that the robot can access it. The second oil tank is pushed to the top of the oil tank chamber by a spring, ready for the next filling step.

[0101] Compared to the above embodiments, the first electric actuator can also be fixed inside the storage cabinet, the needle is fixedly connected to the free end of the first electric actuator, the first metering pump is used to connect the transformer and the needle, and the needle is used to pierce the oil filling tank through the oil filling film of the oil tank, without the need to drill holes in the cabinet to allow the needle to pass through the cabinet.

[0102] Research and development process:

[0103] 1. Technical problems to be solved

[0104] In view of this, the present invention proposes an automatic oil sampling system for transformers, i.e., parallel reactors, which aims to solve the problem that the oil sampling robot cannot accurately locate the oil sampling position due to electromagnetic field interference during the automatic oil sampling process, resulting in automatic oil sampling failure.

[0105] 2 Technical Solution

[0106] The problem of oil extraction robots failing to accurately locate the oil extraction position due to electromagnetic interference during automatic oil extraction is fundamentally caused by the need for accurate positioning of the running track and the oil extraction position, and the need to achieve accurate docking between the transformer oil extraction port and the robot oil extraction port.

[0107] A device is designed that uses a relatively fixed oil outlet position of the transformer and oil sampling position of the oil sampling device to solve the problem of precise positioning of the transformer oil sampling port and the robot oil sampling port. After oil sampling is completed, the oil tank is pushed out from the oil tank chamber 18 and slides onto the conveyor belt 11. The conveyor belt 11 delivers the oil tank to the oil tank platform 12, which is located in a safe area, for inspection personnel to use and test.

[0108] like Figure 1 As shown, the oil tank structure consists of an oil storage tank 3, an oil injection tank 4, an oil injection film 5, an exhaust port 6, and a core 7. Before oil extraction, the core 7 is located at the rightmost end of the oil storage tank 3.

[0109] like Figure 2 As shown in the figure, the overall structure of the transformer 22 is connected to the second metering pump 14 and the first metering pump 13 via oil pipes.

[0110] The second metering pump 14 is connected to the waste oil tank 19 through an oil pipe. Before taking oil, the second metering pump 14 is operated to discharge the dead oil, i.e. non-circulating oil, in the transformer 22 into the waste oil tank 19.

[0111] After the first metering pump 13 discharges waste oil, the first electric pusher 8 inserts the needle 9 through the oil injection film 5 and injects a metered amount of oil into the oil storage tank 3.

[0112] The up-and-down movement of the first electric actuator 8 push rod can enable the needle 9 to penetrate the oil injection film 5 or separate from the oil injection film 5.

[0113] After the second electric pusher 15 finishes taking oil, it pushes the first oil tank 23 to the position of the slide rail 10. The slide rail 10 sends the first oil tank 23 to the conveyor belt 11, and the conveyor belt 11 sends the oil tank to the oil tank platform 12. After the first oil tank 23 is pushed out, the second electric pusher 15 retracts the push rod, and the spring 17 pushes the second oil tank 24 to the position of the first oil tank 23.

[0114] Oil extraction process:

[0115] S1: The second quantitative pump 14 operates to discharge the dead oil (i.e., non-circulating oil) in the transformer 22 into the waste oil tank 19.

[0116] S2: The first electric pusher 8 pushes the needle 9 downward to penetrate the oil injection film 5, the first metering pump 13 rotates, pushing the core 7 to move to the left, the core 7 slides and seals with the wall of the oil storage tank 3, so that the oil does not come into contact with the air, and the metered transformer oil is injected into the oil storage tank 3.

[0117] S3: The first electric push rod 8 moves upward, and the needle 9 separates from the oil injection film 5.

[0118] S4: The second electric pusher 15 pushes the first oil tank 23 to the slide rail 10, and the first oil tank 23 slides along the slide rail 10 to the conveyor belt 11.

[0119] S5: Conveyor belt 11 transports the first oil tank 23 to the oil tank platform 12, which is far away from the transformer 22 and the parallel reactor.

[0120] S6: The testing personnel take the oil from the oil tank platform 12 and use the oil in the oil tank to conduct the test.

[0121] S7: Based on the test results, the content of each component in the standard oil in the oil tank, the volume of the standard oil, and the volume of the sampled oil, calculate the accurate content of each component in the transformer oil. This part is existing technology and will not be described in detail.

[0122] 3. Beneficial effects

[0123] A device is designed that uses a relatively fixed oil outlet position on the transformer and an oil sampling device to solve the problem of precise positioning of the transformer oil sampling port and the robot oil sampling port. After oil sampling is completed, the oil tank is pushed out from the oil tank chamber 18 and slides onto the conveyor belt 11. The conveyor belt 11 transports the oil tank to the oil tank platform 12, which is located in a safe area, for testing personnel to collect and test. The device operates reliably and provides accurate data.

[0124] After this application had been running internally for a period of time, the beneficial aspects reported by on-site technicians were:

[0125] The oil reservoir includes a shell, a boss, an oil storage tank, an oil filling tank, an oil filling film, a vent, and a core. The boss, oil storage tank, and oil filling tank are located inside the shell. The boss is fixedly connected to the inner wall of the shell. The first side of the boss and the inner wall of the shell form the oil storage tank, and the second side of the boss and the inner wall of the shell form the oil filling tank. The oil storage tank and the oil filling tank are connected and form a cavity. The core is located inside the cavity and slides against the inner wall of the shell. The oil filling film and the vent are fixed to the shell. The cavity is connected to the outside through the vent. The oil filling film is used for external needles to pierce the oil filling tank. The device includes a storage cabinet for ejecting stored items according to instructions, and also includes a control... The system comprises an oil injection device, an oil injection electric actuator, a needle, and a first pump. The oil injection electric actuator is fixed on the storage cabinet, and the needle is fixedly connected to the free end of the oil injection electric actuator. The first pump is used to connect the transformer to the needle. The controller is connected to the control terminal of the storage cabinet, the control terminal of the oil injection electric actuator, and the control terminal of the first pump. The storage container is the aforementioned oil tank. The needle is used to pierce the oil tank through the oil injection film to inject oil from the transformer into the oil tank. After injection, the needle is pulled out of the oil tank. The system includes an automatic oil extraction device and an oil tank located inside the storage cabinet. Through the oil tank, storage cabinet, controller, oil injection electric actuator, needle, and first pump, it achieves high efficiency in extracting oil from the transformer.

[0126] Currently, the technical solution of this invention has undergone pilot testing, which is a small-scale trial of the product before large-scale mass production. After the pilot testing was completed, a user survey was conducted on a small scale, and the survey results showed that user satisfaction was high. Now, preparations have begun for the formal production and industrialization of the product (including intellectual property risk warning surveys).

Claims

1. A device for automatically extracting oil from a transformer, comprising a storage cabinet for ejecting stored material upon instruction, characterized in that: It also includes a controller, an oil injection actuator, a needle, and a first pump. The oil injection actuator is fixed to the storage cabinet, and the needle is fixedly connected to the free end of the oil injection actuator. The first pump is used to connect the transformer to the needle. The controller is connected to the control terminal of the storage cabinet, the control terminal of the oil injection actuator, and the control terminal of the first pump. The storage is an oil tank. The needle is used to pierce the oil tank through the oil injection film to inject oil from the transformer into the oil tank. After injection, it is pulled out of the oil tank. The oil tank includes a shell, a boss, an oil storage tank, an oil injection tank, an oil injection film, a vent, and a core. The boss, oil storage tank, and oil injection tank are located inside the shell. The boss is fixedly connected to the inner wall of the shell. The first side of the boss... The inner wall of the housing forms an oil storage chamber, and the second side of the boss forms an oil injection chamber with the inner wall of the housing. The oil storage chamber and the oil injection chamber are connected and interconnected to form a cavity. The core is located in the cavity and slides with the inner wall of the housing. The oil injection film and the vent hole are fixed to the housing. The cavity is connected to the outside through the vent hole. The oil injection film is used for external needles to penetrate the oil injection chamber. There are multiple oil chambers in the storage cabinet. The oil storage chamber, the oil injection chamber, and the oil injection film are distributed sequentially from bottom to top. The top of the core overlaps with the oil injection film, and the bottom of the core overlaps with the bottom of the housing. The core slides with the housing in the horizontal direction. The push rod of the oil injection electric actuator pushes up and down to make the needle penetrate the oil injection film or separate from the oil injection film.

2. The device for automatically extracting oil from a transformer according to claim 1, characterized in that: The core is used to push the oil as it enters through the oil filling tank, thus allowing the oil to enter the oil storage tank.

3. The device for automatically extracting oil from a transformer according to claim 1, characterized in that: It also includes slides that connect to the storage cabinets and are used to retrieve and transfer stored items pushed out of the cabinets.

4. The device for automatically extracting oil from a transformer according to claim 3, characterized in that: It also includes an electric conveyor, the control terminal of which is connected to the control terminal of the electric conveyor. The electric conveyor is used to obtain and transport the stored items from the slide.

5. The device for automatically extracting oil from a transformer according to claim 4, characterized in that: It also includes an oil tank platform, which is used to receive storage from an electric conveyor.

6. The device for automatically extracting oil from a transformer according to claim 1, characterized in that: It also includes a second pump and a waste oil tank. The second pump is used to connect the transformer to the waste oil tank, and the controller is connected to the control terminal of the second pump.

7. A system for automatically extracting oil from a transformer, characterized in that: The device for automatically extracting oil from a transformer, as described in claim 1, further includes an oil tank located inside a storage cabinet.

8. A system for automatically extracting oil from a transformer according to claim 7, characterized in that: It also includes a transformer and a first oil pipe. The transformer, the first oil pipe and the needle are connected in sequence. The first pump is fixedly connected to the first oil pipe. The transformer is used to pump the oil in the transformer into the needle through the first oil pipe and the first pump.

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