A transformer oil sample collection device and system

Abstract

This invention discloses a transformer oil sampling device and system, relating to the field of transformer testing technology. The device includes a controller, an oil storage tank, a piston, an electric push rod, an oil outlet valve, and an oil inlet valve. An exhaust port is provided in the oil storage tank. The piston and electric push rod are located inside the oil storage tank. The oil outlet valve and oil inlet valve are mounted on the oil storage tank. The electric push rod is fixedly connected to the inner wall of the oil storage tank, and its free end is fixedly connected to the piston. The piston is slidably connected to the inner wall of the oil storage tank. The piston is used to obtain oil from the transformer or push oil back to the transformer. The oil outlet valve ensures that transformer oil can only flow from the transformer into the oil storage tank, and the oil inlet valve ensures that transformer oil can only flow from the oil storage tank into the transformer. The oil storage tank, piston, electric push rod, oil outlet valve, and oil inlet valve form a sampling unit. The system includes the above-mentioned device and a transformer. Through the controller, oil storage tank, piston, electric push rod, oil outlet valve, and oil inlet valve, it collects oil samples accurately and safely.

Description

Technical Field

[0001] This invention relates to the field of transformer testing technology, and in particular to a transformer oil sample collection device and system. Background Technology

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

[0003] The authorization announcement number is CN115040808B, and the name is "An Immersion Fire Extinguishing Device for High-Voltage Bushings of Ultra-High Voltage Transformers." The main components include a gas extinguishing unit, a cooling water circulation unit, a hydraulic cylinder power unit, an emergency oil drainage unit, and a control unit. When a fire occurs in the high-voltage bushing, the extinguishing sleeve rises under the action of the hydraulic cylinder, forming a relatively sealed space outside the high-voltage bushing. Gas nozzles installed inside the high-voltage bushing continuously spray gas to extinguish the fire. Cooling water circulates from top to bottom through spirally arranged water pipes inside the high-voltage bushing, carrying away most of the heat generated by the fire. After the high-voltage bushing ruptures due to fire, its internal insulating oil can flow into the lower oil-gas storage chamber. After the insulating oil flame is extinguished, it is discharged into the emergency oil pool. The structure is reliable and can effectively extinguish fires in high-voltage bushings of ultra-high voltage transformers. Through the telescopic extinguishing sleeve, gas extinguishing unit, and cooling water circulation unit, it directly solves the problem of the difficulty in timely extinguishing of high-voltage bushing fires at their root.

[0004] The authorization announcement number is CN217114077U, and the name is "An Oil-Immersed Transformer with Welded High-Voltage Bushing Terminals". It includes a transformer body, with a hollow oil injection pipe vertically positioned at the top of the transformer body. One end of the oil injection pipe extends into the interior of the transformer body. Inside the oil injection pipe, a pipe-type oil injection tube with one sealed end is reciprocating up and down. A ring-shaped piston is fitted outside the oil injection pipe. The oil injection tube and piston are located on the transformer body and cooperate with each other. The oil injection tube is connected to an external oil pipe. Pressing down on the oil injection tube allows the opening on the tube to enter the interior of the transformer body. When the transformer body is nearly full of transformer oil, the piston, under the pressure of the transformer oil, drives the oil injection tube into the oil injection pipe, preventing transformer oil from entering the transformer body through the opening, thus achieving an automatic stop-filling function.

[0005] The authorization announcement number is CN109882456B, and the name is "An Oil Conveying Device". It includes a main pipeline, a drain pipe, a connecting pipe, a venting assembly, and a drive sleeve. The main pipeline, drain pipe, connecting pipe, and venting assembly are connected in a specific way to form an oil conveying pipeline path. The venting assembly performs evacuation and degassing operations within the pipeline, achieving directional oil conveying. The venting assembly only requires manual operation to provide power. The drive sleeve is connected to the venting assembly in a specific way; simply rotating the turntable on the drive sleeve can simultaneously drive at least one venting assembly to operate. This solves the problem that traditional oil pumping equipment cannot convey oil without power equipment or other energy supply. Furthermore, the oil conveying device described herein has high oil transfer efficiency, is portable, and easy to operate.

[0006] Based on the above three patent documents and existing technical solutions, the inventors analyze the existing technical solutions as follows.

[0007] The power grid company requires the transformer oil chromatography online monitoring device to perform oil sample testing every eight hours. However, severe transformer discharge accidents develop extremely rapidly, and the entire development process can be completed during the intervals between oil chromatography tests. This renders the most effective and sensitive detection method for partial discharge ineffective, and makes it impossible to trace any oil chromatography data during the fault development process. This results in the loss of core data in the accident analysis process, greatly affecting the analysis and tracing of the fault cause. Furthermore, when severe discharge defects exist inside the transformer, on-site oil sampling carries certain risks.

[0008] Existing technical issues and considerations:

[0009] How to solve the technical problems of poor accuracy and safety in oil sample collection. Summary of the Invention

[0010] This invention provides a transformer oil sample collection device and system, which solves the technical problem of poor accuracy and safety in oil sample collection.

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

[0012] A transformer oil sampling device includes a controller, an oil storage tank, a piston, an electric push rod, an oil outlet valve, and an oil inlet valve. An exhaust port is provided in the oil storage tank. The piston and electric push rod are located inside the oil storage tank. The oil outlet valve and oil inlet valve are mounted on the oil storage tank. The electric push rod is fixedly connected to the inner wall of the oil storage tank, and its free end is fixedly connected to the piston. The piston is slidably connected to the inner wall of the oil storage tank. The piston is used to obtain oil from the transformer or push oil back to the transformer. The oil outlet valve connects the transformer and the oil storage tank, ensuring that transformer oil can only flow from the transformer into the oil storage tank. The oil inlet valve connects the transformer and the oil storage tank, ensuring that transformer oil can only flow from the oil storage tank into the transformer. The control terminal of the controller is electrically connected to the control terminal of the electric push rod, the control terminal of the controller is electrically connected to the control terminal of the oil outlet valve, and the control terminal of the controller is electrically connected to the control terminal of the oil inlet valve. The oil storage tank, piston, electric push rod, oil outlet valve, and oil inlet valve form a sampling unit.

[0013] A further technical solution is that both the oil outlet valve and the oil inlet valve are check valves, and the oil outlet valve and the oil inlet valve are installed in opposite directions.

[0014] A further technical solution is that both the oil outlet valve and the oil inlet valve are electric valves.

[0015] A further technical solution is that both the oil outlet valve and the oil inlet valve are solenoid valves.

[0016] A further technical solution is that the number of sampling units is one.

[0017] A further technical solution is that the number of sampling units is two, namely a first sampling unit and a second sampling unit, and the first sampling unit and the second sampling unit have the same structure.

[0018] A further technical solution is that the number of sampling units is eleven, namely the first to the eleventh sampling units, and the first to the eleventh sampling units have the same structure.

[0019] A further technical solution includes a communication device, with the controller connected to the communication device.

[0020] A further technical solution includes a management terminal, which is connected to the communication device.

[0021] A transformer oil sampling system includes the aforementioned transformer oil sampling device, and also includes a transformer, which is connected to an oil storage tank via an oil outlet valve and an oil inlet valve.

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

[0023] First, a transformer oil sampling device includes a controller, an oil storage tank, a piston, an electric push rod, an oil outlet valve, and an oil inlet valve. An exhaust port is provided in the oil storage tank. The piston and electric push rod are located inside the oil storage tank. The oil outlet valve and oil inlet valve are mounted on the oil storage tank. The electric push rod is fixedly connected to the inner wall of the oil storage tank, and its free end is fixedly connected to the piston. The piston is slidably connected to the inner wall of the oil storage tank. The piston is used to obtain oil from the transformer or push oil back to the transformer. The oil outlet valve connects the transformer and the oil storage tank, ensuring that transformer oil can only flow from the transformer into the oil storage tank. The oil inlet valve connects the transformer and the oil storage tank, ensuring that transformer oil can only flow from the oil storage tank into the transformer. The control terminal of the controller is electrically connected to the control terminal of the electric push rod, the control terminal of the controller, and the control terminal of the controller is electrically connected to the control terminal of the oil outlet valve. The oil storage tank, piston, electric push rod, oil outlet valve, and oil inlet valve form a sampling unit. This technical solution, through the controller, oil storage tank, piston, electric push rod, oil outlet valve, and oil inlet valve, ensures accurate and safe oil sampling.

[0024] Second, a transformer oil sampling system includes the aforementioned transformer oil sampling device, and also includes a transformer. The transformer is connected to an oil storage tank via an oil outlet valve, and the transformer is also connected to an oil storage tank via an oil inlet valve. This technical solution, through a controller, oil storage tank, piston, electric push rod, oil outlet valve, and oil inlet valve, ensures accurate and safe oil sampling.

[0025] See the detailed implementation section for further description. Attached Figure Description

[0026] Figure 1 This is a structural diagram of Embodiment 1 of the present invention;

[0027] Figure 2 This is a principle block diagram of Embodiment 1 of the present invention;

[0028] Figure 3 This is a structural diagram of Embodiment 2 of the present invention;

[0029] Figure 4 This is a principle block diagram of Embodiment 2 of the present invention.

[0030] in:

[0031] 1. Oil storage tank;

[0032] 2 pistons;

[0033] 3. Electric linear actuator;

[0034] 4. Oil outlet valve;

[0035] 5. Oil inlet valve;

[0036] 6 vents;

[0037] 7. Transformers;

[0038] 8. First sampling unit;

[0039] 9. Second sampling unit. Detailed Implementation

[0040] 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.

[0041] 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.

[0042] Example 1:

[0043] like Figure 1 and Figure 2 As shown, the present invention discloses a transformer oil sample collection device including a controller, an oil storage tank 1, a piston 2, an electric push rod 3, an oil outlet valve 4 and an oil inlet valve 5, and an exhaust port 6 is provided in the oil storage tank 1.

[0044] like Figure 1 As shown, piston 2 and electric push rod 3 are located inside oil storage tank 1. Oil outlet valve 4 and oil inlet valve 5 are installed and fixed on oil storage tank 1. Electric push rod 3 is fixedly connected to the inner wall of oil storage tank 1. The free end of electric push rod 3 is fixedly connected to piston 2. Piston 2 is slidably connected to the inner wall of oil storage tank 1. Piston 2 is used to obtain oil from transformer or push oil back to transformer. Oil outlet valve 4 is used to connect transformer 7 and oil storage tank 1 so that transformer oil can only flow from transformer into oil storage tank 1. Oil inlet valve 5 is used to connect transformer 7 and oil storage tank 1 so that transformer oil can only flow from oil storage tank 1 into transformer.

[0045] like Figure 2 As shown, the control terminal of the controller is electrically connected to the control terminal of the electric push rod 3, the control terminal of the controller is electrically connected to the control terminal of the oil outlet valve 4, and the control terminal of the controller is electrically connected to the control terminal of the oil inlet valve 5. The oil storage tank 1, piston 2, electric push rod 3, oil outlet valve 4 and oil inlet valve 5 form a sampling unit.

[0046] Both the oil outlet valve 4 and the oil inlet valve 5 are non-return valves. The oil outlet valve 4 and the oil inlet valve 5 are installed in opposite directions, and both the oil outlet valve 4 and the oil inlet valve 5 are solenoid valves.

[0047] The number of sampling units is one.

[0048] The controller is a microcontroller. The microcontroller, electric push rod 3, oil outlet valve 4 and oil inlet valve 5 themselves, as well as the corresponding communication connection technology, are existing technologies and will not be described in detail here.

[0049] Instructions for use of Example 1:

[0050] like Figure 1 As shown, during installation, transformer 7 is connected to oil storage tank 1 via oil outlet valve 4, and transformer 7 is connected to oil storage tank 1 via oil inlet valve 5.

[0051] Example 2:

[0052] The difference between Embodiment 2 and Embodiment 1 is that there are two sampling units, namely a first sampling unit and a second sampling unit, and the first sampling unit and the second sampling unit have the same structure.

[0053] like Figure 3 and Figure 4 As shown, the present invention discloses a transformer oil sample collection device including a controller, an oil storage tank, a piston, an electric push rod, an oil outlet valve and an oil inlet valve, and an exhaust port is provided in the oil storage tank.

[0054] The piston and electric push rod are located inside the oil storage tank. The oil outlet valve and oil inlet valve are installed and fixed on the oil storage tank. The electric push rod is fixedly connected to the inner wall of the oil storage tank. The free end of the electric push rod is fixedly connected to the piston. The piston is slidably connected to the inner wall of the oil storage tank. The piston is used to obtain oil from the transformer or push the oil back to the transformer. The oil outlet valve is used to connect the transformer and the oil storage tank so that transformer oil can only flow from the transformer into the oil storage tank. The oil inlet valve is used to connect the transformer and the oil storage tank so that transformer oil can only flow from the oil storage tank into the transformer.

[0055] Both the oil outlet valve and the oil inlet valve are non-return valves, and the oil outlet valve and the oil inlet valve are installed in opposite directions. Both the oil outlet valve and the oil inlet valve are solenoid valves.

[0056] The oil storage tank, piston, electric push rod, oil outlet valve, and oil inlet valve form a sampling unit.

[0057] like Figure 3 As shown, there are two sampling units, namely the first sampling unit 8 and the second sampling unit 9. The first sampling unit 8 and the second sampling unit 9 have the same structure.

[0058] The first sampling unit 8 includes a first oil storage tank, a first piston, a first electric push rod, a first oil outlet valve, and a first oil inlet valve.

[0059] The second sampling unit 9 includes a second oil storage tank, a second piston, a second electric push rod, a second oil outlet valve, and a second oil inlet valve.

[0060] like Figure 4 As shown, the controller's control terminal is electrically connected to the control terminal of the first electric push rod, the controller's control terminal is electrically connected to the control terminal of the first oil outlet valve, the controller's control terminal is electrically connected to the control terminal of the first oil inlet valve, the controller's control terminal is electrically connected to the control terminal of the second electric push rod, the controller's control terminal is electrically connected to the control terminal of the second oil outlet valve, and the controller's control terminal is electrically connected to the control terminal of the second oil inlet valve.

[0061] The controller is a microcontroller. The microcontroller, electric actuator, oil outlet valve, and oil inlet valve themselves, as well as the corresponding communication connection technology, are existing technologies and will not be described in detail here.

[0062] Example 3:

[0063] The difference between Embodiment 3 and Embodiment 2 is that the number of sampling units is eleven, namely the first to the eleventh sampling units, and the first to the eleventh sampling units have the same structure.

[0064] The present invention discloses a transformer oil sample collection device, including a controller, an oil storage tank, a piston, an electric push rod, an oil outlet valve and an oil inlet valve, and an exhaust port is provided in the oil storage tank.

[0065] The piston and electric push rod are located inside the oil storage tank. The oil outlet valve and oil inlet valve are installed and fixed on the oil storage tank. The electric push rod is fixedly connected to the inner wall of the oil storage tank. The free end of the electric push rod is fixedly connected to the piston. The piston is slidably connected to the inner wall of the oil storage tank. The piston is used to obtain oil from the transformer or push the oil back to the transformer. The oil outlet valve is used to connect the transformer and the oil storage tank so that transformer oil can only flow from the transformer into the oil storage tank. The oil inlet valve is used to connect the transformer and the oil storage tank so that transformer oil can only flow from the oil storage tank into the transformer.

[0066] Both the oil outlet valve and the oil inlet valve are non-return valves, and the oil outlet valve and the oil inlet valve are installed in opposite directions. Both the oil outlet valve and the oil inlet valve are solenoid valves.

[0067] The oil storage tank, piston, electric push rod, oil outlet valve, and oil inlet valve form a sampling unit.

[0068] The number of sampling units is eleven, namely the first to the eleventh sampling units, and the first to the eleventh sampling units have the same structure.

[0069] The first sampling unit includes a first oil storage tank, a first piston, a first electric push rod, a first oil outlet valve, and a first oil inlet valve.

[0070] The second sampling unit includes a second oil storage tank, a second piston, a second electric push rod, a second oil outlet valve, and a second oil inlet valve.

[0071] The third sampling unit includes a third oil storage tank, a third piston, a third electric push rod, a third oil outlet valve, and a third oil inlet valve.

[0072] The fourth sampling unit includes a fourth oil reservoir, a fourth piston, a fourth electric push rod, a fourth oil outlet valve, and a fourth oil inlet valve.

[0073] The fifth sampling unit includes a fifth oil reservoir, a fifth piston, a fifth electric push rod, a fifth oil outlet valve, and a fifth oil inlet valve.

[0074] The sixth sampling unit includes a sixth oil reservoir, a sixth piston, a sixth electric push rod, a sixth oil outlet valve, and a sixth oil inlet valve.

[0075] The seventh sampling unit includes a seventh oil reservoir, a seventh piston, a seventh electric push rod, a seventh oil outlet valve, and a seventh oil inlet valve.

[0076] The eighth sampling unit includes an eighth oil reservoir, an eighth piston, an eighth electric push rod, an eighth oil outlet valve, and an eighth oil inlet valve.

[0077] The ninth sampling unit includes a ninth oil reservoir, a ninth piston, a ninth electric push rod, a ninth oil outlet valve, and a ninth oil inlet valve.

[0078] The tenth sampling unit includes a tenth oil reservoir, a tenth piston, a tenth electric push rod, a tenth oil outlet valve, and a tenth oil inlet valve.

[0079] The eleventh sampling unit includes an eleventh oil storage tank, an eleventh piston, an eleventh electric push rod, an eleventh oil outlet valve, and an eleventh oil inlet valve.

[0080] The controller's control terminal is electrically connected to the control terminal of the first electric push rod, the controller's control terminal is electrically connected to the control terminal of the first oil outlet valve, and the controller's control terminal is electrically connected to the control terminal of the first oil inlet valve.

[0081] The controller's control terminal is electrically connected to the control terminal of the second electric push rod, the controller's control terminal is electrically connected to the control terminal of the second oil outlet valve, and the controller's control terminal is electrically connected to the control terminal of the second oil inlet valve.

[0082] The controller's control terminal is electrically connected to the control terminal of the third electric push rod, the controller's control terminal is electrically connected to the control terminal of the third oil outlet valve, and the controller's control terminal is electrically connected to the control terminal of the third oil inlet valve.

[0083] The controller's control terminal is electrically connected to the control terminal of the fourth electric push rod, the controller's control terminal is electrically connected to the control terminal of the fourth oil outlet valve, and the controller's control terminal is electrically connected to the control terminal of the fourth oil inlet valve.

[0084] The controller's control terminal is electrically connected to the control terminal of the fifth electric push rod, the controller's control terminal is electrically connected to the control terminal of the fifth oil outlet valve, and the controller's control terminal is electrically connected to the control terminal of the fifth oil inlet valve.

[0085] The controller's control terminal is electrically connected to the control terminal of the sixth electric push rod, the controller's control terminal is electrically connected to the control terminal of the sixth oil outlet valve, and the controller's control terminal is electrically connected to the control terminal of the sixth oil inlet valve.

[0086] The controller's control terminal is electrically connected to the control terminal of the seventh electric push rod, the controller's control terminal is electrically connected to the control terminal of the seventh oil outlet valve, and the controller's control terminal is electrically connected to the control terminal of the seventh oil inlet valve.

[0087] The controller's control terminal is electrically connected to the control terminal of the eighth electric push rod, the controller's control terminal is electrically connected to the control terminal of the eighth oil outlet valve, and the controller's control terminal is electrically connected to the control terminal of the eighth oil inlet valve.

[0088] The controller's control terminal is electrically connected to the control terminal of the ninth electric push rod, the controller's control terminal is electrically connected to the control terminal of the ninth oil outlet valve, and the controller's control terminal is electrically connected to the control terminal of the ninth oil inlet valve.

[0089] The controller's control terminal is electrically connected to the control terminal of the tenth electric push rod, the controller's control terminal is electrically connected to the control terminal of the tenth oil outlet valve, and the controller's control terminal is electrically connected to the control terminal of the tenth oil inlet valve.

[0090] The controller's control terminal is electrically connected to the control terminal of the eleventh electric push rod, the controller's control terminal is electrically connected to the control terminal of the eleventh oil outlet valve, and the controller's control terminal is electrically connected to the control terminal of the eleventh oil inlet valve.

[0091] The controller is a microcontroller. The microcontroller, electric actuator, oil outlet valve, and oil inlet valve themselves, as well as the corresponding communication connection technology, are existing technologies and will not be described in detail here.

[0092] Example 4:

[0093] Example 4 differs from Example 3 in that it also includes a communication device and a management terminal, with the controller connected to the communication device and the management terminal connected to the communication device.

[0094] The present invention discloses a transformer oil sample collection device, including a controller, a communication device and a management terminal, an oil storage tank, a piston, an electric push rod, an oil outlet valve and an oil inlet valve, and an exhaust port is provided in the oil storage tank.

[0095] The piston and electric push rod are located inside the oil storage tank. The oil outlet valve and oil inlet valve are installed and fixed on the oil storage tank. The electric push rod is fixedly connected to the inner wall of the oil storage tank. The free end of the electric push rod is fixedly connected to the piston. The piston is slidably connected to the inner wall of the oil storage tank. The piston is used to obtain oil from the transformer or push the oil back to the transformer. The oil outlet valve is used to connect the transformer and the oil storage tank so that transformer oil can only flow from the transformer into the oil storage tank. The oil inlet valve is used to connect the transformer and the oil storage tank so that transformer oil can only flow from the oil storage tank into the transformer.

[0096] Both the oil outlet valve and the oil inlet valve are non-return valves, and the oil outlet valve and the oil inlet valve are installed in opposite directions. Both the oil outlet valve and the oil inlet valve are solenoid valves.

[0097] The oil storage tank, piston, electric push rod, oil outlet valve, and oil inlet valve form a sampling unit.

[0098] The number of sampling units is eleven, namely the first to the eleventh sampling units, and the first to the eleventh sampling units have the same structure.

[0099] The similarities will not be repeated here.

[0100] The controller is electrically connected to the communication device, and the management terminal is electrically connected to the communication device.

[0101] The controller is an industrial computer. The controller, communication device, management terminal, electric actuator, oil outlet valve and oil inlet valve themselves, as well as the corresponding communication connection technology, are existing technologies and will not be described in detail here.

[0102] Example 5:

[0103] Example 5 differs from Example 1 in that it also includes a transformer, which is connected to the oil storage tank 1 via the oil outlet valve 4 and the oil inlet valve 5.

[0104] like Figure 1 and Figure 2 As shown, the present invention discloses a transformer oil sample collection system including a transformer, a controller, an oil storage tank 1, a piston 2, an electric push rod 3, an oil outlet valve 4, and an oil inlet valve 5, with an exhaust port 6 provided in the oil storage tank 1.

[0105] like Figure 1As shown, piston 2 and electric push rod 3 are located inside oil storage tank 1. Oil outlet valve 4 and oil inlet valve 5 are installed and fixed on oil storage tank 1. Electric push rod 3 is fixedly connected to the inner wall of oil storage tank 1. The free end of electric push rod 3 is fixedly connected to piston 2. Piston 2 is slidably connected to the inner wall of oil storage tank 1. Piston 2 is used to obtain oil from transformer or push oil back to transformer. Transformer 7 is connected to oil storage tank 1 through oil outlet valve 4 and oil inlet valve 5. Oil outlet valve 4 is used to connect transformer 7 and oil storage tank 1 so that transformer oil can only flow from transformer to oil storage tank 1. Oil inlet valve 5 is used to connect transformer 7 and oil storage tank 1 so that transformer oil can only flow from oil storage tank 1 to transformer.

[0106] like Figure 2 As shown, the control terminal of the controller is electrically connected to the control terminal of the electric push rod 3, the control terminal of the controller is electrically connected to the control terminal of the oil outlet valve 4, and the control terminal of the controller is electrically connected to the control terminal of the oil inlet valve 5. The oil storage tank 1, piston 2, electric push rod 3, oil outlet valve 4 and oil inlet valve 5 form a sampling unit.

[0107] Both the oil outlet valve 4 and the oil inlet valve 5 are non-return valves. The oil outlet valve 4 and the oil inlet valve 5 are installed in opposite directions, and both the oil outlet valve 4 and the oil inlet valve 5 are solenoid valves.

[0108] The number of sampling units is one.

[0109] The controller is a microcontroller. The microcontroller, electric push rod 3, oil outlet valve 4 and oil inlet valve 5 themselves, as well as the corresponding communication connection technology, are existing technologies and will not be described in detail here.

[0110] Example 6:

[0111] Example 6 differs from Example 2 in that it also includes a transformer, which is connected to the oil storage tank via an oil outlet valve and an oil inlet valve.

[0112] The present invention discloses a transformer oil sampling system, including the transformer oil sampling device of Embodiment 2, and also includes a transformer, wherein the transformer is connected to the oil storage tank through each oil outlet valve and the transformer is connected to the oil storage tank through each oil inlet valve.

[0113] Example 7:

[0114] Example 7 differs from Example 3 in that it also includes a transformer, which is connected to the oil storage tank via an oil outlet valve and an oil inlet valve.

[0115] The present invention discloses a transformer oil sampling system, including the transformer oil sampling device of Embodiment 3, and also includes a transformer, wherein the transformer is connected to the oil storage tank through each oil outlet valve and the transformer is connected to the oil storage tank through each oil inlet valve.

[0116] Research and development process:

[0117] 1. Technical problems to be solved

[0118] Preserving transformer oil samples before a transformer discharge accident provides strong support for accident analysis and tracing.

[0119] When there are serious discharge defects inside the transformer, reduce the time for on-site personnel to take oil samples to ensure the personal safety of the operators.

[0120] 2 Technical Solution

[0121] like Figure 1 As shown, the oil outlet valve 4 and the oil inlet valve 5 are check valves installed in opposite directions.

[0122] Oil outlet valve 4 ensures that transformer oil can only flow from the transformer into oil storage tank 1.

[0123] Oil inlet valve 5 ensures that transformer oil can only flow into the transformer from oil storage tank 1.

[0124] like Figure 2 As shown, the electric push rod 3 is connected to the first movable core. The electric push rod 3 pushes the first movable core upward to inject transformer oil in the oil storage tank 1 into the transformer through the oil inlet valve 5; the electric push rod 3 pulls the first movable core downward to inject oil in the transformer into the oil storage tank 1 through the oil outlet valve 4.

[0125] The first movable core can slide up and down while maintaining a seal within the oil storage tank 1.

[0126] Ventilation holes are provided at the bottom of the oil storage tank 1 to ensure gas flow when the first movable core slides up and down.

[0127] Vent hole, also known as exhaust hole 6.

[0128] The moving core is the piston.

[0129] Operation process:

[0130] In the initial state, all oil storage tanks 1, the pipelines connecting oil storage tanks 1 to the transformer, the oil outlet valve 4, and the oil inlet valve 5 are filled with transformer oil.

[0131] Oil storage process:

[0132] S1 electric push rod 3 pushes the first movable core to inject old oil from oil storage tank 1 into the transformer. The electric push rod 3 increases its pushing force and automatically stops pushing.

[0133] S2 electric push rod 3 pulls the second movable core to draw fresh transformer oil sample from the transformer into the oil storage tank 1.

[0134] Repeat steps S1-S2 to ensure that the old oil in oil storage tank 1, oil outlet valve 4, oil inlet valve 5 and pipeline is completely drained, and the oil storage tank 1 is filled with fresh oil samples.

[0135] n identical structures can be installed on the transformer, with the same operating procedures and equal time intervals between operations. For example, using 11 identical structures, the first structure collects fresh oil samples at 5 min, 65 min, and 125 min; the second structure collects fresh oil samples at 10 min, 70 min, and 130 min; the third structure collects fresh oil samples at 15 min, 75 min, and 135 min; ...; the tenth structure collects fresh oil samples at 50 min, 110 min, and 170 min; and the eleventh structure collects fresh oil samples at 55 min, 115 min, and 175 min.

[0136] This ensures that at any given time, the syringe can retain 11 oil samples taken every 5 minutes within one hour of the incident.

[0137] The number of structures can be increased sufficiently.

[0138] The sampling frequency of insulating oil can be adjusted by controlling different sampling times of the equipment.

[0139] 3. Beneficial effects

[0140] This ensures that at any given time, the syringe can retain 11 oil samples taken every 5 minutes within one hour of the incident.

[0141] The number of structures can be increased sufficiently.

[0142] The sampling frequency of insulating oil can be adjusted by controlling different sampling times of the equipment.

[0143] Oil chromatographic analysis was performed on four oil samples taken at different times. By observing the changes in fault characteristic gases, the development of internal faults in the transformer was inferred.

[0144] After this application had been running internally for a period of time, the beneficial aspects reported by on-site technicians were:

[0145] The transformer oil sampling device includes a controller, an oil storage tank, a piston, an electric actuator, an oil outlet valve, and an oil inlet valve. An exhaust port is provided in the oil storage tank. The piston and electric actuator are located inside the oil storage tank. The oil outlet valve and oil inlet valve are mounted on the oil storage tank. The electric actuator is fixedly connected to the inner wall of the oil storage tank, and its free end is fixedly connected to the piston. The piston is slidably connected to the inner wall of the oil storage tank. The piston is used to obtain oil from the transformer or push oil back to the transformer. The oil outlet valve connects the transformer and the oil storage tank, ensuring that transformer oil flows only from the transformer into the oil storage tank. The oil inlet valve connects the transformer and the oil storage tank, ensuring that transformer oil flows only from the oil storage tank into the transformer. The control terminals of the controller, the electric actuator, the oil outlet valve, and the oil inlet valve are electrically connected. The oil storage tank, piston, electric actuator, oil outlet valve, and oil inlet valve form a sampling unit. Through the controller, oil storage tank, piston, electric actuator, oil outlet valve, and oil inlet valve, the device collects oil samples accurately and safely.

[0146] 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 method for collecting transformer oil samples, characterized in that: The system includes a transformer oil sampling device, comprising a controller, an oil storage tank, a piston, an electric push rod, an oil outlet valve, and an oil inlet valve. An exhaust port is provided in the oil storage tank. The piston and electric push rod are located inside the oil storage tank. The oil outlet valve and oil inlet valve are mounted on the oil storage tank. The electric push rod is fixedly connected to the inner wall of the oil storage tank, and its free end is fixedly connected to the piston. The piston is slidably connected to the inner wall of the oil storage tank. The piston is used to obtain oil from the transformer or push oil back to the transformer. The oil outlet valve connects the transformer and the oil storage tank, ensuring that transformer oil can only flow from the transformer into the oil storage tank. The oil inlet valve connects the transformer and the oil storage tank, ensuring that transformer oil can only flow from the oil storage tank into the transformer. The control terminal of the controller is electrically connected to the control terminal of the electric push rod, the control terminal of the controller, and the control terminal of the controller is electrically connected to the control terminal of the oil outlet valve and the control terminal of the controller. The oil storage tank, piston, electric push rod, oil outlet valve, and oil inlet valve form a sampling unit. The sampling unit includes eleventh to first sampling units, all of which have identical structures. In the initial state, all oil storage tanks, pipelines connecting the oil storage tanks to the transformer, oil outlet valves, and oil inlet valves are filled with transformer oil. The method includes the following steps: S1 electric push rod pushes piston to inject old oil from oil storage tank into transformer. The electric push rod automatically stops pushing when the pushing force increases. The S2 electric push rod pulls the piston to draw fresh transformer oil samples from the transformer into the oil storage tank. Repeat S1-S2 to ensure that the old oil in the oil storage tank, oil outlet valve, oil inlet valve and pipeline is completely drained, and the oil storage tank is filled with fresh oil samples. The controller controls eleven sampling units, which operate at equal intervals and cycle through the oil storage process, ensuring that the oil storage tank can store eleven oil samples taken every five minutes within one hour of the time of the accident at any given moment.

2. The method for collecting transformer oil samples according to claim 1, characterized in that: Both the oil outlet valve and the oil inlet valve are non-return valves, and the oil outlet valve and the oil inlet valve are installed in opposite directions.

3. The method for collecting transformer oil samples according to claim 1, characterized in that: Both the oil outlet valve and the oil inlet valve are electric valves.

4. The method for collecting transformer oil samples according to claim 3, characterized in that: Both the oil outlet valve and the oil inlet valve are solenoid valves.

5. The method for collecting transformer oil samples according to claim 1, characterized in that: The number of sampling units is one.

6. The method for collecting transformer oil samples according to claim 1, characterized in that: There are two sampling units, namely a first sampling unit and a second sampling unit, and the first sampling unit and the second sampling unit have the same structure.

7. The method for collecting transformer oil samples according to claim 1, characterized in that: It also includes a communication device, and the controller is connected to the communication device.

8. A method for collecting transformer oil samples according to claim 7, characterized in that: It also includes a management terminal, which is connected to the communication device.

9. The method for collecting transformer oil samples according to any one of claims 1 to 8, characterized in that: It also includes a transformer, which is connected to the oil storage tank via an oil outlet valve and an oil storage tank via an oil inlet valve.

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