Transformer oil sample collection device and system

Abstract

The application discloses a transformer oil sample collecting device and system, and relates to the technical field of transformer detection.The device comprises an oil outlet pipeline, an oil return pipeline, first to third pumps, first to seventh valves, first to fourth needle tubes, an oil transfer bin and a respirator.The oil outlet pipeline is used for connecting the oil transfer bin with a transformer, and the oil return pipeline is used for connecting the oil transfer bin with the transformer.The oil transfer bin is connected with the respirator.The first needle tube is connected with the oil outlet pipeline through the fourth valve.The second needle tube is connected with the oil outlet pipeline through the fifth valve.The third needle tube is connected with the oil outlet pipeline through the sixth valve.The fourth needle tube is connected with the oil outlet pipeline through the seventh valve.The first pump and the first valve are fixedly connected on the oil return pipeline.The second pump, the second valve, the third pump and the third valve are fixedly connected on the oil outlet pipeline.The system comprises the device and a transformer.The four needle tubes and the like distributed on the oil outlet pipeline improve the work efficiency of oil detection from the transformer.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of transformer detection, and particularly relates to a transformer oil sample collection device and system. BACKGROUND

[0002] The author searches by the search formula (TACD=(transformer AND valve AND pump AND respirator)), and obtains the following prior art solutions close to the present application.

[0003] A power transformation equipment maintenance management system is disclosed in CN109615557B. The system comprises an operation stage database for storing attribute information of an operation stage of a power transformation equipment; a defect database for storing defect data of the power transformation equipment in different operation stages; a maintenance mode database for storing maintenance modes of the power transformation equipment in different operation stages; a state parameter obtaining module for obtaining state parameters of the power transformation equipment in different operation stages; a defect data generating module for generating defect data of the state parameters of the power transformation equipment in different operation stages according to the state parameters of the power transformation equipment in different operation stages; and a maintenance mode determining module for determining the maintenance modes corresponding to the state parameters of the power transformation equipment in different operation stages according to the defect data of the state parameters of the power transformation equipment in different operation stages. The system can generate the maintenance modes of the power transformation equipment in different operation stages, has high accuracy and low cost.

[0004] A system and method for detecting the composition of ionized gas in a transformer gas relay are disclosed in CN115856220A. The system comprises a collection pipe connected to the gas relay, a valve is arranged on the collection pipe, the valve is connected to a gas detection chamber through a gas guide pipe, a gas exchange pipeline is arranged on the gas guide pipe for replacing the gas in the gas detection chamber. After detecting the ionized gas alarm in the gas relay, the ionized gas in the gas relay is extracted to the gas detection chamber through the gas guide pipe, the extracted gas is detected, the detection results are uploaded, and then the gas exchange pipeline is used to replace the gas in the gas detection chamber for the next detection. The system has a simple structure, can detect the gas at the first time after the gas leakage alarm, does not need manual on-site operation, replaces manual operation, eliminates personal safety hazards, and improves the equipment operation and maintenance level.

[0005] A method and device for transformer condition-based maintenance with reliability as the center are disclosed in CN115792461A, entitled "Transformer Condition-Based Maintenance Method and Device with Reliability as the Center". The method analyzes the complete transformer fault knowledge by performing FMEA analysis on the fault type and fault cause of the transformer; performs transformer state parameter fault probability analysis based on the complete transformer fault knowledge; performs importance classification of the components at the equipment level and transformer risk assessment; and performs transformer health state assessment based on transformer state monitoring and life assessment to determine the transformer full-cycle operation health maintenance measures. The method can perform condition-based maintenance of the transformer, a complex power transformation device, with reliability as the center, clearly defines the composition structure of the transformer, divides the transformer device subsystems according to the different functional units realized by each component of the device, analyzes the operation characteristics of each independent subsystem, and thus clearly defines the functional realization mechanism of the device, thereby better identifying and diagnosing defects or failure modes.

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

[0007] The power grid company requires the transformer oil chromatography online monitoring device to perform oil sample detection every 8 hours, but the development speed of a malignant transformer discharge accident is extremely fast, which is enough to complete the entire development process during the oil chromatography test gap period, causing the failure of the most effective and sensitive detection method reflecting partial discharge, and making it impossible to trace any fault development process oil chromatography data, resulting in the loss of core data in the accident analysis process and greatly affecting the analysis and tracing of the fault cause. At the same time, when there is a serious discharge defect inside the transformer, the on-site oil sampling work has certain risks.

[0008] Existing technical problems and considerations:

[0009] How to solve the technical problem of low efficiency of oil detection work from the transformer. SUMMARY

[0010] The present application provides a transformer oil sample collection device and system, which solves the technical problem of low efficiency of oil detection work from the transformer.

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

[0012] The transformer oil sample collecting device comprises an oil outlet pipeline, an oil return pipeline, first to third pumps, first to seventh valves, first to fourth needle tubes, an oil transfer bin and a respirator, the oil outlet pipeline is used for connecting the oil transfer bin with a transformer, the oil return pipeline is used for connecting the oil transfer bin with the transformer, the oil transfer bin is connected with the respirator in a conductive mode, the first needle tube is connected with the oil outlet pipeline in a conductive mode through the fourth valve, the second needle tube is connected with the oil outlet pipeline in a conductive mode through the fifth valve, the third needle tube is connected with the oil outlet pipeline in a conductive mode through the sixth valve, the fourth needle tube is connected with the oil outlet pipeline in a conductive mode through the seventh valve, the first pump and the first valve are fixedly connected on the oil return pipeline, the second pump, the second valve, the third pump and the third valve are fixedly connected on the oil outlet pipeline, and the oil transfer bin, the third pump, the third valve, the fourth needle tube, the third needle tube, the second needle tube, the first needle tube, the second pump and the second valve are sequentially arranged on the oil outlet pipeline.

[0013] Further, the technical scheme is characterized in that the device further comprises a controller, each of the first to seventh valves is an electric valve, the control end of the controller is electrically connected with the control end of each electric valve, and the control end of the controller is electrically connected with the control end of each pump.

[0014] Further, the technical scheme is characterized in that the electric valve is an electromagnetic valve.

[0015] Further, the technical scheme is characterized in that the controller is a single-chip microcomputer.

[0016] Further, the technical scheme is characterized in that the first pump is a liquid level control pump.

[0017] Further, the technical scheme is characterized in that the second pump is a constant flow pump.

[0018] Further, the technical scheme is characterized in that the third pump is a pressure pump.

[0019] Further, the technical scheme is characterized in that the device further comprises a communication device, and the communication device is electrically connected with the controller.

[0020] Further, the technical scheme is characterized in that the device further comprises a management terminal, and the management terminal is connected with and communicates with the communication device.

[0021] The transformer oil sample collecting system comprises the above-mentioned transformer oil sample collecting device and further comprises a transformer, the transformer is connected with the oil transfer bin in a conductive mode through the oil outlet pipeline, and the transformer is connected with the oil transfer bin in a conductive mode through the oil return pipeline.

[0022] The above-mentioned technical scheme has the following beneficial effects:

[0023] First, a transformer oil sample collection device includes an oil outlet pipeline, an oil return pipeline, first to third pumps, first to seventh valves, first to fourth needle tubes, an oil transfer bin and a respirator, the oil outlet pipeline is used for connecting the oil transfer bin with a transformer, the oil return pipeline is used for connecting the oil transfer bin with the transformer, the oil transfer bin is connected with the respirator in a conductive mode, the first needle tube is connected with the oil outlet pipeline in a conductive mode through the fourth valve, the second needle tube is connected with the oil outlet pipeline in a conductive mode through the fifth valve, the third needle tube is connected with the oil outlet pipeline in a conductive mode through the sixth valve, the fourth needle tube is connected with the oil outlet pipeline in a conductive mode through the seventh valve, the first pump and the first valve are fixedly connected on the oil return pipeline, the second pump, the second valve, the third pump and the third valve are fixedly connected on the oil outlet pipeline, and the oil transfer bin, the third pump, the third valve, the fourth needle tube, the third needle tube, the second needle tube, the first needle tube, the second pump and the second valve are sequentially distributed on the oil outlet pipeline. The technical scheme has the advantages that the four needle tubes and the like distributed on the oil outlet pipeline improve the work efficiency of oil detection from the transformer.

[0024] Second, a transformer oil sample collection system includes the transformer oil sample collection device, and further includes a transformer, the transformer is connected with the oil transfer bin in a conductive mode through the oil outlet pipeline, and the transformer is connected with the oil transfer bin in a conductive mode through the oil return pipeline. The technical scheme has the advantages that the four needle tubes and the like distributed on the oil outlet pipeline improve the work efficiency of oil detection from the transformer.

[0025] For details, see the description in the specific embodiment part. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is a structural diagram of embodiment 1 of the present application;

[0027] Figure 2 is a principle block diagram of embodiment 1 of the present application;

[0028] Figure 3 is a principle block diagram of embodiment 2 of the present application;

[0029] Figure 4 is a principle block diagram of embodiment 3 of the present application.

[0030] Among them:

[0031] 1, the oil outlet pipeline;

[0032] 2, the oil return pipeline;

[0033] 3, the first pump;

[0034] 4, the second pump;

[0035] 5, the third pump;

[0036] 6, the first electromagnetic valve;

[0037] 7, the second electromagnetic valve;

[0038] 8 third solenoid valve;

[0039] 9 fourth solenoid valve;

[0040] 10 fifth solenoid valve;

[0041] 11 sixth solenoid valve;

[0042] 12 seventh solenoid valve;

[0043] 13 first needle tube;

[0044] 14 second needle tube;

[0045] 15 third needle tube;

[0046] 16 fourth needle tube;

[0047] 17 oil transfer bin;

[0048] 18 breather;

[0049] 19 transformer. DETAILED DESCRIPTION

[0050] The technical solutions in the embodiments of the present application will be described clearly and completely in the following with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative, but not as any limitation on the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative efforts, fall within the scope of protection of the present application.

[0051] In the following description, many specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced without the specific details that are set forth in the following description, in other manners different from those described herein, and it can be apparent to those skilled in the art that the present application is not limited to the specific embodiments disclosed herein and can be practiced with or without the same in embodiments of the present application without departing from the scope of the present application.

[0052] Embodiment 1:

[0053] As shown in Figure 1 and Figure 2 The present application discloses a transformer oil sample collection device, which comprises a controller, an oil outlet pipeline 1, an oil return pipeline 2, first to third pumps, first to seventh valves, first to fourth needle tubes, an oil transfer bin 17 and a breather 18. The first to seventh valves are all electric valves.

[0054] The controller is a single-chip microcomputer.

[0055] The first pump 3 is a liquid level control pump.

[0056] The second pump, number 4, is a fixed displacement pump.

[0057] The third pump, 5, is a pressure pump.

[0058] The electric valves are solenoid valves, namely the first solenoid valve 6, the second solenoid valve 7, the third solenoid valve 8, the fourth solenoid valve 9, the fifth solenoid valve 10, the sixth solenoid valve 11, and the seventh solenoid valve 12.

[0059] like Figure 1 As shown, the oil outlet line 1 is used to connect the oil transfer chamber 17 to the transformer 19, and the oil return line 2 is used to connect the oil transfer chamber 17 to the transformer 19. The oil transfer chamber 17 is connected to the breather 18. The first needle tube 13 is connected to the oil outlet line 1 via the fourth valve. The second needle tube 14 is connected to the oil outlet line 1 via the fifth valve. The third needle tube 15 is connected to the oil outlet line 1 via the sixth valve. The fourth needle tube 16 is connected to the oil outlet line 1 via the seventh valve. The first pump 3 and the first valve are fixedly connected to the oil return line 2. The second pump 4, the second valve, the third pump 5 and the third valve are fixedly connected to the oil outlet line 1. The oil transfer chamber 17, the third pump 5, the third valve, the fourth needle tube 16, the third needle tube 15, the second needle tube 14, the first needle tube 13, the second pump 4 and the second valve are distributed sequentially on the oil outlet line 1.

[0060] like Figure 2 As shown, the controller's control terminal is electrically connected to the control terminal of each electric valve, and the controller's control terminal is electrically connected to the control terminal of each pump. Specifically, the controller's control terminal is electrically connected to the control terminal of the first solenoid valve 6, the second solenoid valve 7, the third solenoid valve 8, the fourth solenoid valve 9, the fifth solenoid valve 10, the sixth solenoid valve 11, the seventh solenoid valve 12, the first pump 3, the second pump 4, and the third pump 5.

[0061] The controller, solenoid valve, and pump themselves, as well as the corresponding communication connection technology, are existing technologies and will not be described in detail here.

[0062] Instructions for use of Example 1:

[0063] like Figure 1 As shown, in application, it is connected to transformer 19. Transformer 19 is connected to oil transfer chamber 17 via oil outlet pipeline 1, and transformer 19 is connected to oil transfer chamber 17 via oil return pipeline 2.

[0064] Example 2:

[0065] Embodiment 2 differs from embodiment 1 in that it further comprises a communication device, which is electrically connected with the controller, so as to share the detection data.

[0066] As shown in Figure 1 and Figure 3 The application discloses a transformer oil sample collecting device which comprises a controller, a communication device, an oil outlet pipeline 1, an oil return pipeline 2, first to third pumps, first to seventh valves, first to fourth needle tubes, an oil transfer bin 17 and a breather 18, wherein the first to seventh valves are all electric valves.

[0067] The controller is a single-chip microcomputer.

[0068] The first pump 3 is a liquid level control pump.

[0069] The second pump 4 is a constant pump.

[0070] The third pump 5 is a pressure pump.

[0071] The electric valves are electromagnetic valves, which are respectively a first electromagnetic valve 6, a second electromagnetic valve 7, a third electromagnetic valve 8, a fourth electromagnetic valve 9, a fifth electromagnetic valve 10, a sixth electromagnetic valve 11 and a seventh electromagnetic valve 12.

[0072] As shown in Figure 1 The oil outlet pipeline 1 is used for connecting the oil transfer bin 17 with a transformer 19, the oil return pipeline 2 is used for connecting the oil transfer bin 17 with the transformer 19, the oil transfer bin 17 is connected with the breather 18, the first needle tube 13 is connected with the oil outlet pipeline 1 through the fourth valve, the second needle tube 14 is connected with the oil outlet pipeline 1 through the fifth valve, the third needle tube 15 is connected with the oil outlet pipeline 1 through the sixth valve, the fourth needle tube 16 is connected with the oil outlet pipeline 1 through the seventh valve, the first pump 3 and the first valve are fixedly connected on the oil return pipeline 2, the second pump 4, the second valve, the third pump 5 and the third valve are fixedly connected on the oil outlet pipeline 1, and the oil transfer bin 17, the third pump 5, the third valve, the fourth needle tube 16, the third needle tube 15, the second needle tube 14, the first needle tube 13, the second pump 4 and the second valve are sequentially distributed on the oil outlet pipeline 1.

[0073] As shown in Figure 3As shown, the control end of the controller is electrically connected with the control end of each electric valve, and the control end of the controller is electrically connected with the control end of each pump. The control end of the controller is electrically connected with the control end of the first electromagnetic valve 6, the control end of the controller is electrically connected with the control end of the second electromagnetic valve 7, the control end of the controller is electrically connected with the control end of the third electromagnetic valve 8, the control end of the controller is electrically connected with the control end of the fourth electromagnetic valve 9, the control end of the controller is electrically connected with the control end of the fifth electromagnetic valve 10, the control end of the controller is electrically connected with the control end of the sixth electromagnetic valve 11, the control end of the controller is electrically connected with the control end of the seventh electromagnetic valve 12, the control end of the controller is electrically connected with the control end of the first pump 3, the control end of the controller is electrically connected with the control end of the second pump 4, and the control end of the controller is electrically connected with the control end of the third pump 5. The communication device is electrically connected with the controller.

[0074] Among them, the controller, the electromagnetic valve, the pump and the communication device itself and the corresponding communication connection technology are prior art and will not be described here.

[0075] Embodiment 3:

[0076] Embodiment 3 differs from embodiment 2 in that it further comprises a management terminal, which is connected with and communicates with the communication device. In order to manage the detection data.

[0077] As Figure 1 and Figure 4 The application discloses a transformer oil sample collection device, which comprises a controller, a communication device, a management terminal, an oil outlet pipeline 1, an oil return pipeline 2, first to third pumps, first to seventh valves, first to fourth needle tubes, an oil transfer bin 17 and a breather 18, and the first to seventh valves are electrically operated valves.

[0078] The controller is a single-chip microcomputer.

[0079] The first pump 3 is a liquid level control pump.

[0080] The second pump 4 is a constant flow pump.

[0081] The third pump 5 is a pressure pump.

[0082] The electrically operated valve is an electromagnetic valve, which is a first electromagnetic valve 6, a second electromagnetic valve 7, a third electromagnetic valve 8, a fourth electromagnetic valve 9, a fifth electromagnetic valve 10, a sixth electromagnetic valve 11 and a seventh electromagnetic valve 12.

[0083] As Figure 1As shown, the oil outlet pipeline 1 is used for connecting the oil transfer bin 17 with the transformer 19, the oil return pipeline 2 is used for connecting the oil transfer bin 17 with the transformer 19, the oil transfer bin 17 is connected with the respirator 18, the first needle tube 13 is connected with the oil outlet pipeline 1 through the fourth valve, the second needle tube 14 is connected with the oil outlet pipeline 1 through the fifth valve, the third needle tube 15 is connected with the oil outlet pipeline 1 through the sixth valve, the fourth needle tube 16 is connected with the oil outlet pipeline 1 through the seventh valve, the first pump 3 and the first valve are fixedly connected on the oil return pipeline 2, the second pump 4, the second valve, the third pump 5 and the third valve are fixedly connected on the oil outlet pipeline 1, and the oil transfer bin 17, the third pump 5, the third valve, the fourth needle tube 16, the third needle tube 15, the second needle tube 14, the first needle tube 13, the second pump 4 and the second valve are sequentially distributed on the oil outlet pipeline 1.

[0084] As shown in the figure, Figure 4 the control end of the controller is electrically connected with the control end of each electric valve, and the control end of the controller is electrically connected with the control end of each pump. The control end of the controller is electrically connected with the control end of the first electromagnetic valve 6, the control end of the controller is electrically connected with the control end of the second electromagnetic valve 7, the control end of the controller is electrically connected with the control end of the third electromagnetic valve 8, the control end of the controller is electrically connected with the control end of the fourth electromagnetic valve 9, the control end of the controller is electrically connected with the control end of the fifth electromagnetic valve 10, the control end of the controller is electrically connected with the control end of the sixth electromagnetic valve 11, the control end of the controller is electrically connected with the control end of the seventh electromagnetic valve 12, the control end of the controller is electrically connected with the control end of the first pump 3, the control end of the controller is electrically connected with the control end of the second pump 4, and the control end of the controller is electrically connected with the control end of the third pump 5. The communication device is electrically connected with the controller. The management terminal is electrically connected with the communication device and communicates.

[0085] Among them, the controller, the management terminal, the electromagnetic valve, the pump and the communication device itself and the corresponding communication connection technology are prior art and will not be described here.

[0086] Embodiment 4:

[0087] Embodiment 4 is different from embodiment 1 in that it further comprises a transformer, the transformer is a measured device, and the measuring device and the measured device form a test system.

[0088] As shown in the figure, Figure 1 The application discloses a transformer oil sample collection system comprising the transformer oil sample collection device of embodiment 1, and further comprises a transformer 19, wherein the transformer 19 is connected with the oil transfer bin 17 through the oil outlet pipeline 1, and the transformer 19 is connected with the oil transfer bin 17 through the oil return pipeline 2.

[0089] The controller is a single-chip microcomputer.

[0090] The first pump 3 is a liquid level control pump.

[0091] The second pump, number 4, is a fixed displacement pump.

[0092] The third pump, 5, is a pressure pump.

[0093] The electric valves are solenoid valves, namely the first solenoid valve 6, the second solenoid valve 7, the third solenoid valve 8, the fourth solenoid valve 9, the fifth solenoid valve 10, the sixth solenoid valve 11, and the seventh solenoid valve 12.

[0094] like Figure 1 As shown, the oil outlet line 1 is used to connect the oil transfer chamber 17 to the transformer 19, and the oil return line 2 is used to connect the oil transfer chamber 17 to the transformer 19. The oil transfer chamber 17 is connected to the breather 18. The first needle tube 13 is connected to the oil outlet line 1 via the fourth valve. The second needle tube 14 is connected to the oil outlet line 1 via the fifth valve. The third needle tube 15 is connected to the oil outlet line 1 via the sixth valve. The fourth needle tube 16 is connected to the oil outlet line 1 via the seventh valve. The first pump 3 and the first valve are fixedly connected to the oil return line 2. The second pump 4, the second valve, the third pump 5 and the third valve are fixedly connected to the oil outlet line 1. The oil transfer chamber 17, the third pump 5, the third valve, the fourth needle tube 16, the third needle tube 15, the second needle tube 14, the first needle tube 13, the second pump 4 and the second valve are distributed sequentially on the oil outlet line 1.

[0095] like Figure 2 As shown, the controller's control terminal is electrically connected to the control terminal of each electric valve, and the controller's control terminal is electrically connected to the control terminal of each pump. Specifically, the controller's control terminal is electrically connected to the control terminal of the first solenoid valve 6, the second solenoid valve 7, the third solenoid valve 8, the fourth solenoid valve 9, the fifth solenoid valve 10, the sixth solenoid valve 11, the seventh solenoid valve 12, the first pump 3, the second pump 4, and the third pump 5.

[0096] Example 5:

[0097] Example 5 differs from Example 2 in that it also includes a transformer, which is the device under test, and the measuring device and the device under test form a test system.

[0098] The present invention discloses a transformer oil sampling system, including the transformer oil sampling device of Embodiment 2, and also includes a transformer, which is connected to the oil transfer chamber via an oil outlet pipeline and an oil return pipeline.

[0099] Example 6:

[0100] Embodiment 6 differs from embodiment 3 in that it further comprises a transformer, the transformer being the measured device, and the measuring device and the measured device form a test system.

[0101] The application discloses a transformer oil sample collection system comprising the transformer oil sample collection device of embodiment 3, and further comprises a transformer, the transformer being communicated with the oil transfer bin through an oil outlet pipeline and communicated with the oil transfer bin through an oil return pipeline.

[0102] R&D process:

[0103] 1. Technical problem to be solved

[0104] The transformer oil sample is retained before the transformer discharge accident occurs, thereby providing strong support for accident analysis and tracing. When there is a serious discharge defect in the transformer, the time for the on-site personnel to take the oil sample is reduced, and the personal safety of the operating personnel is ensured.

[0105] 2. Technical scheme

[0106] Operation process:

[0107] In the initial state, all needle tubes are filled with a quantitative xmL oil, the pipeline is filled with transformer oil, the oil transfer bin 17 is filled with oil between the lowest oil level and the highest oil level, all valves are in the closed state, and all pumps are in the stopped state.

[0108] The liquid level in the oil transfer bin 17 is automatically controlled, and a liquid level controller probe is arranged at the lowest and highest liquid levels respectively, when the liquid level is higher than the highest liquid level, the first valve is opened, the first pump 3 is controlled to rotate to inject the oil in the transfer bin into the transformer 19, and when the liquid level is lower than the lowest liquid level, the first valve is controlled to be closed and the first pump 3 is controlled to stop rotating to stop injecting the oil in the transfer bin into the transformer 19.

[0109] The first pump 3 is a liquid level control pump, the second pump 4 is a quantitative pump, and the third pump 5 is a pressure pump.

[0110] The first valve, the second valve, the third valve, the fourth valve, the fifth valve, the sixth valve and the seventh valve are electromagnetic valves.

[0111] Action process:

[0112] S1 opens the third valve and the fourth valve, closes the first valve, the second valve, the fifth valve, the sixth valve and the seventh valve, and starts the third pump 5 to inject the oil in the first needle tube 13 into the oil transfer bin 17 until the oil in the syringe is completely injected into the oil transfer bin 17, and the third pump 5 is automatically stopped after the pressure rises.

[0113] S2 opens the second valve and the fourth valve, closes the first valve, the third valve, the fifth valve, the sixth valve and the seventh valve, and starts the second pump 4 to quantitatively inject xmL oil into the first needle tube 13.

[0114] S3 repeat S1, S2 several times stop, control the number of times, ensure that the original pipeline inside the oil is all injected into the transfer warehouse, and the needle tube is filled with transformer 19 inside oil.

[0115] m minutes later

[0116] Repeat the S1-S3 process to fill the second needle tube 14 with new transformer oil.

[0117] m minutes later

[0118] Repeat the S1-S3 process to fill the third needle tube 15 with new transformer oil.

[0119] m minutes later

[0120] Repeat the S1-S3 process to fill the fourth needle tube 16 with new transformer oil.

[0121] m minutes later

[0122] Repeat the S1-S3 process to fill the first needle tube 13 with new transformer oil.

[0123] Ensure that the needle tube always keeps 4 times the oil samples collected during the m minute process.

[0124] The number of syringes can be increased to ensure that the number of samples saved is sufficient.

[0125] The time m can be controlled to ensure the frequency of collecting insulating oil.

[0126] 3 beneficial effects

[0127] Ensure that the needle tube always keeps 4 times the oil samples collected during the m minute process.

[0128] The number of syringes can be increased to ensure that the number of samples saved is sufficient.

[0129] The time m can be controlled to ensure the frequency of collecting insulating oil.

[0130] The oil chromatographic analysis of 4 different time oil samples is carried out, and the development of the internal fault of the transformer is inferred through the change of fault characteristic gas.

[0131] After the internal operation of the present application for a period of time, the on-site technical personnel feedback the beneficial aspects:

[0132] A transformer oil sample collecting device includes an oil outlet pipeline, an oil return pipeline, first to third pumps, first to seventh valves, first to fourth needle tubes, an oil transfer bin and a respirator, the oil outlet pipeline is used for connecting the oil transfer bin with a transformer, the oil return pipeline is used for connecting the oil transfer bin with the transformer, the oil transfer bin is connected with the respirator in a conductive mode, the first needle tube is connected with the oil outlet pipeline in a conductive mode through the fourth valve, the second needle tube is connected with the oil outlet pipeline in a conductive mode through the fifth valve, the third needle tube is connected with the oil outlet pipeline in a conductive mode through the sixth valve, the fourth needle tube is connected with the oil outlet pipeline in a conductive mode through the seventh valve, the first pump and the first valve are fixedly connected on the oil return pipeline, the second pump, the second valve, the third pump and the third valve are fixedly connected on the oil outlet pipeline, the oil transfer bin, the third pump, the third valve, the fourth needle tube, the third needle tube, the second needle tube, the first needle tube, the second pump and the second valve are sequentially distributed on the oil outlet pipeline. Through the four needle tubes and the like distributed on the oil outlet pipeline, the work efficiency of oil detection from the transformer is improved.

[0133] At present, the technical scheme of the application has been pilot tested, that is, a small-scale test before large-scale production of the product; after the pilot test is completed, user use research is carried out in a small range, and the research result shows that the user satisfaction is high; now, preparation for formal production of the product for industrialization (including intellectual property risk early warning research) has been started.

Claims

1. A method for collecting transformer oil samples, characterized in that: The device includes a transformer oil sampling device, which comprises an oil outlet pipeline, a return pipeline, first to third pumps, first to seventh valves, first to fourth needle tubes, an oil transfer chamber, and a breather. The oil outlet pipeline connects the oil transfer chamber to the transformer, the return pipeline connects the oil transfer chamber to the transformer, and the oil transfer chamber is connected to the breather. The first needle tube is connected to the oil outlet pipeline via the fourth valve, the second needle tube is connected to the oil outlet pipeline via the fifth valve, the third needle tube is connected to the oil outlet pipeline via the sixth valve, and the fourth needle tube is connected to the oil outlet pipeline via the seventh valve. The first pump and the first valve are fixedly connected to the return pipeline, and the second pump, the second valve, the third pump, and the third valve are fixedly connected to the oil outlet pipeline. The oil transfer chamber, the third pump, the third valve, the fourth needle tube, the third needle tube, the second needle tube, the first needle tube, the second pump, and the second valve are distributed sequentially on the oil outlet pipeline. In the initial state, all syringes are filled with a fixed amount of oil, the pipelines are filled with transformer oil, the oil transfer chamber is filled with oil between the lowest and highest oil levels, all valves are closed, and all pumps are stopped. The oil transfer chamber has an automatic liquid level control system, equipped with a liquid level controller probe installed at the lowest and highest liquid levels. When the liquid level is higher than the highest liquid level, the first valve is opened and the first pump is controlled to rotate to inject oil from the transfer chamber into the transformer. When the liquid level is lower than the lowest liquid level, the first valve is closed and the first pump is stopped from rotating to stop injecting oil from the transfer chamber into the transformer. It also includes the following steps, S1 opens the third and fourth valves and closes the first, second, fifth, sixth, and seventh valves; the third pump is turned on to inject the oil in the first syringe into the oil transfer chamber until all the oil in the syringe is injected into the oil transfer chamber. S2 opens the second and fourth valves, and closes the first, third, fifth, sixth, and seventh valves; the second pump is started to inject oil into the first needle tube in a metered manner; S3 repeats S1 and S2 several times and then stops, all the oil inside the pipeline is injected into the transfer chamber, and the needle is filled with transformer oil. m minutes later Repeat the S1-S3 process to fill the second syringe with new transformer oil; m minutes later Repeat the S1-S3 process to fill the third needle with new transformer oil; m minutes later Repeat the S1-S3 process to fill the fourth needle with new transformer oil; m minutes later Repeat the S1-S3 process to fill the first syringe with new transformer oil.

2. The transformer oil sample collection method according to claim 1, characterized in that: It also includes a controller. The first to seventh valves are all electric valves. The control terminal of the controller is electrically connected to the control terminal of each electric valve and the control terminal of each pump.

3. The transformer oil sample collection method according to claim 2, characterized in that: The electric valve is a solenoid valve.

4. The transformer oil sample collection method according to claim 2, characterized in that: The controller is a microcontroller.

5. The transformer oil sample collection method according to claim 1, characterized in that: The first pump is a level control pump.

6. The transformer oil sample collection method according to claim 1, characterized in that: The second pump is a metering pump.

7. The transformer oil sample collection method according to claim 1, characterized in that: The third pump is a pressure pump.

8. The transformer oil sample collection method according to claim 2, characterized in that: It also includes a communication device, which is electrically connected to the controller.

9. The transformer oil sampling method according to claim 8, characterized in that: It also includes a management terminal, which connects to and communicates with the communication device.

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