205 results about "Oil quality" patented technology

The invention relates to the technical field of physical property analysis, in particular to a rapeseed oil quality detection method and device and a storage medium. Determining Raman spectrum data of the rapeseed oil sample based on the oleic acid concentration and the erucic acid concentration; determining a peak intensity contribution coefficient based on the Raman spectrum data; based on the oleic acid concentration, the erucic acid concentration and the peak intensity contribution coefficient, constructing a rapeseed oil quality detection model; and performing quality detection on Raman peak characteristics of to-be-predicted rapeseed oil based on the rapeseed oil quality detection model to obtain a detection result of the to-be-predicted rapeseed oil. According to the method, the prediction precision of the rapeseed oil quality is improved.

The invention relates to the technical field of lubricating oil quality monitoring, in particular to a lubricating oil quality on-line monitoring system and method, and the system comprises a data collection module which collects lubricating oil parameters in real time through a sensor array; the communication transmission module is used for constructing a data flow network and supporting multi-level interaction; the data analysis and diagnosis module is used for realizing state evaluation and fault early warning; the user interaction and visualization module provides a human-computer interaction interface and decision support; and the intelligent decision module realizes monitoring-maintenance closed-loop control, gives an alarm in time and realizes full-link intelligent control triggered by a maintenance action. According to the method, the prediction precision and the early warning capability of the degradation trend of the oil system are effectively improved through the improved autoregression moving average model, the real-time state of the oil is accurately reflected by dynamically adjusting the alarm threshold value, and the fault positioning precision is greatly improved through the space matching algorithm.

The invention discloses an oil liquid quality evaluation system based on big data, and relates to the technical field of multi-source sensing and Internet of Things, and the system comprises a data collection module which collects full-dimensional data through a heterogeneous sensing array of an oil-containing liquid multi-parameter integrated sensor and a high-frequency vibration sensor in combination with a timestamp synchronous triggering mechanism; the space-time calibration module adopts a dynamic time warping-interpolation collaborative algorithm to align the vibration signal and the oil data, and the information loss is controlled to be lower than a preset threshold value; the feature fusion module generates enhanced fusion features through a pre-trained embedded model and a double-stage attention mechanism; the intelligent evaluation model outputs oil quality grade and fault early warning based on a deep neural network, and the federated learning optimization unit guarantees data privacy; and the visual output module visually displays the result. The system improves the evaluation precision and the data utilization rate, adapts to industrial predictive maintenance, and reduces the shutdown loss of equipment.

The invention relates to the technical field of spectral analysis, and discloses a spectral analysis-based safflower oil diglyceride oil quality detection method. The method comprises the following steps: firstly, acquiring sample spectrum acquisition parameters and original spectrum data, wherein the data contains characteristic absorption peak wave band information and is acquired according to a preset scanning mode; preprocessing the original spectral data, and extracting feature absorption difference points to generate a feature mapping set; dividing an effective detection interval based on the feature mapping set, and adjusting spectrum acquisition parameters to form a correction parameter group; aligning the adjusted spectral data to generate multi-dimensional spectral data; and inputting an absorption peak matching model to carry out characteristic absorption peak matching processing, identifying a characteristic identifier and a quality abnormality identifier, and generating a quality judgment result. After a result is generated, the equipment working state and environmental parameters are monitored in real time, and the correction parameter set is dynamically adjusted to adapt to environmental changes. According to the method, the quality of the safflower oil diglyceride oil can be accurately detected, and the detection efficiency and reliability are improved.

The invention discloses an oil quality detection method and system, and relates to the technical field of industrial equipment state monitoring. The method comprises the following steps: regularly collecting operation condition and environment data in the operation process of the hydraulic system, performing oil quality abnormity prediction, and generating a predicted oil abnormity probability; when the predicted oil abnormal probability exceeds a preset probability threshold value, oil sampling is triggered to obtain an oil sample; calling a historical predicted oil abnormal probability sequence in the sliding window to analyze an oil quality deterioration trend, and obtaining an oil quality deterioration rate; and generating an adaptive oil quality detection scheme by combining the current detection time interval and the oil quality deterioration rate, detecting the oil sample according to the adaptive oil quality detection scheme, and outputting a result. According to the method, the conversion from fixed period maintenance to state prediction maintenance is realized, the problem that excessive detection and insufficient detection coexist in a traditional method is effectively solved, and the accuracy, timeliness and resource utilization efficiency of oil quality monitoring are improved.

The utility model discloses a kind of downhole safety valves for medium and heavy oil quality well, it is related to safety valve technical field;Including:valve body, both ends are provided with connecting joint;Valve seat, it is set in valve body, the internal cavity of valve body is separated into control chamber and connecting chamber, middle part is provided with valve hole;Valve plate, it is set in connecting chamber, it is adapted with elastic reset piece, covers in the lower end of valve hole;Valve stem, it is adapted with reset spring, lower end is movably inserted in valve hole;Hydraulic drive rod group, it is installed in control chamber, it is adapted with movable rod, the movable rod can push down the valve stem;Explosion response mechanism can be controlled detonation on ground, it is installed between lower end of the hydraulic drive rod group and upper end of the valve stem, in the case of detonation, it can drive the movable rod to move up and drive the valve stem to move down;Wherein, in the case where the movable rod pushes down the valve plate, two The connecting joint is communicated. With the characteristics of high reliability and high emergency response capability.

The application discloses an oil blending component oil proportioning optimization control method, system, device and medium based on soft measurement. The application predicts the quality attribute of the finished oil in real time through a soft measurement module, obtains an attribute prediction value, determines a target gain with the original proportioning data, and corrects the model gain of a multivariable controller online by using the target gain, generates adjusted target proportioning data by the multivariable controller, and issues a formula control instruction to a control device, so that the component oil proportioning is accurately adjusted. When the component oil formula or attribute changes, the application can automatically and timely adjust the controller gain, effectively overcome the nonlinearity of the blending process, improve the control precision and system robustness, thereby guaranteeing the stability of the finished oil quality and avoiding the waste of high-value component oil. By introducing the soft measurement technology, the method can replace the traditional online analyzer to a certain extent, reduce the dependence on expensive instruments, and improve the economy and maintenance convenience of the system.

The utility model provides a blending device with an oil product quality monitoring function, which relates to the technical field of oil production and comprises a blending tank, a blending cavity and a storage cavity are respectively arranged in the blending tank, a sleeve is arranged at the central position in the blending cavity, a connecting column is embedded in the sleeve, and a rotating rod is rotatably connected in a connector on the surface of the connecting column. Stirring blades are fixed to the two ends of the rotating rod, a base plate and a discharging plate are connected between the blending cavity and the storage cavity, an infrared detector and a receiver are installed at an installation opening in the inner wall of the blending tank and an installation opening in the top face of the discharging plate respectively, and the infrared detector and the receiver are vertically aligned in position. According to the stirring device, the vertical circulating flow of liquid can be enhanced, stirring is more uniform, the blades are adjustable, the stirring device can adapt to liquid with different viscosities, densities and components, the more accurate stirring effect is achieved, and meanwhile the water content in an oil product can be monitored in the blending process in an infrared light detection mode.

This application relates to an assembly device for an EPB transmission structure, specifically within the technical field of EPB power heads. The assembly device includes a conveyor line, a fixture, a clamping mechanism, a robotic arm, and an oiling mechanism. The fixture positions the housing and places it on the conveyor line for transport. The clamping mechanism presses against the housing for positioning. The oiling mechanism includes an oiling ring mounted on a mounting frame with multiple oiling holes arranged in a circular array inside; and a conveyor belt that transports gears at intervals. This application utilizes a robotic arm to grasp and drive the transport gears, and the multiple oiling holes in the oiling ring, in conjunction with the gear rotation, uniformly add lubricating oil to the gears. After adding oil, the gear rotation causes excess lubricating oil to flow back into the oiling ring, improving assembly efficiency and oiling quality while reducing lubricating oil waste and the risk of environmental pollution.

The present application relates to the technical field of physical property analysis, and particularly relates to a rapeseed oil quality detection method and device and a storage medium, which comprises the following steps: obtaining the concentration of oleic acid and the concentration of erucic acid of a rapeseed oil sample; determining the Raman spectrum data of the rapeseed oil sample based on the concentration of oleic acid and the concentration of erucic acid; determining a peak intensity contribution coefficient based on the Raman spectrum data; constructing a rapeseed oil quality detection model based on the concentration of oleic acid, the concentration of erucic acid and the peak intensity contribution coefficient; and performing quality detection on the Raman peak characteristics of a rapeseed oil to be predicted based on the rapeseed oil quality detection model to obtain a detection result of the rapeseed oil to be predicted. The method improves the prediction accuracy of the quality of rapeseed oil.

The utility model relates to the field of vehicle cup stand processing equipment, in particular to cup stand oiling equipment which comprises a mounting platform, a rotating tool, a rotating driving mechanism and a spray oiling mechanism, the rotating tool is rotatably arranged on the mounting platform, the rotating driving mechanism drives the rotating tool to rotate, a cup stand is mounted on the rotating tool and rotates along with the rotating tool, and the spray oiling mechanism is arranged on the mounting platform. The rotating tool is provided with a vacuum suction cup used for adsorbing and fixing the cup stand, the spraying and oiling mechanism comprises a fixing frame, a spraying valve and an oil spraying nozzle, the spraying valve is installed on the fixing frame and controls the oil spraying action of the oil spraying nozzle, and the oil spraying nozzle faces the position, to be subjected to oil spraying, of the cup stand and sprays oil. According to the utility model, the cup stand to be oiled is positioned and fastened through the rotating tool, the rotating driving mechanism drives the rotating tool and the cup stand to rotate for a circle, and the spraying oiling mechanism is matched to complete the oiling action, so that the process is simple and quick, the grease is uniformly coated, the oiling quality and efficiency are effectively improved, and the labor cost required by the production link is greatly reduced.

The utility model belongs to the technical field of insulating oil detection, and discloses an insulating oil dielectric strength testing device which comprises a rack and a detection assembly arranged in the rack, and the detection assembly comprises a sealing vessel used for containing insulating oil and a detection unit used for dielectric strength detection; the motor is arranged on the rack; the clamping arm is used for clamping a vessel, and the clamping arm is fixedly connected with the output end of the motor; the air inlet valve is communicated with the vessel through a pipeline; the exhaust valve is communicated with the vessel through a pipeline; the nitrogen cylinder is communicated with the air inlet valve through a pipeline; according to the scheme, insulating oil is introduced into the vessel in an inclined mode, air in the vessel is replaced, the oxidation influence of oxygen and moisture on oil quality is reduced, and therefore abnormal discharge and data deviation caused by bubbles are reduced; the utility model solves the problem that the existing dielectric strength vessel is easy to cause bubbles to be mixed into the insulating oil.

Disclosed herein is a method for co-pyrolysis of a polyolefin and a rubber containing material comprising: operating at least a pyrolysis stage of a pyrolysis reactor at an operating temperature at or above the temperature at which pyrolysis of both the polyolefin and the rubber containing material commences and up to about 600° C. under a substantially inert atmosphere; feeding a mixture comprising the polyolefin and the rubber containing material into the pyrolysis reactor; co-pyrolysing the mixture in the pyrolysis reactor to produce a pyrolysis gas comprising volatile pyrolysis products of the polyolefin and the rubber, wherein the volatile pyrolysis product of the olefin comprises at least a short chain olefin and the volatile product of the rubber comprises at least a diene; and facilitating a gas phase reaction between the short chain olefin and the diene to produce a volatile gas comprising single-ring aromatic hydrocarbons.

The invention provides a grain and oil quality impurity component detection device, which comprises a detection tank, an annular material plate is rotatably connected in the detection tank, visual detection devices are installed above the left side and the right side of the annular material plate, stock bins are installed above the front side and the rear side of the annular material plate, and the left side and the right side of the annular material plate are provided with visual detection devices. A discharging mechanism and a V-shaped paving plate are installed on the two sides of the stock bin in the clockwise rotation direction of the annular material plate correspondingly, vibration mechanisms are installed in the positions, below the left side and the right side of the annular material plate, in the detection tank correspondingly, and each vibration mechanism comprises an impact ball capable of impacting the annular material plate in a vertical reciprocating mode; and the center of the detection tank is rotationally connected with a driving shaft, and a plurality of dispersing plates are fixedly installed on the side wall, located below the annular material plate, of the driving shaft. The device can effectively avoid the problem of leak detection caused by grain and oil accumulation, realizes a continuous grain and oil detection process, realizes integration of detection and impurity removal, and improves the overall efficiency.

The present application relates to a kind of oiling detection device, gas Roots flowmeter and oiling detection method.Solve the existing technology in the gas Roots flowmeter in use, due to maintenance is not timely, often appear because of the lack of lubricating oil, metamorphism, leading to the wear of shaft, bearing, thereby influence measurement accuracy, even appear the phenomenon of jamming problem.Oiling detection device includes control module, oil level detection infrared receiving tube connected with control module, oil level detection infrared emitting tube, oil quality detection infrared receiving tube, oil quality detection infrared emitting tube, and left to right sequentially connected transmission and reflection piece, refraction and reflection piece and sheath, by the difference of infrared emitted and received light signal information, to realize the detection of oil level and oil quality;The present application also proposes a kind of gas Roots flowmeter based on oiling detection device and oiling detection method.

A method for monitoring the lubricating oil in a vacuum pump, applied to a controller in a monitoring system that monitors the lubricating oil in the vacuum pump, wherein the monitoring system includes an oil quality sensor, an ultrasonic liquid level sensor, a display device, and a controller, and the monitoring method includes the steps of: receiving a first signal emitted by the oil quality sensor, transmitting a first display drive signal to the display device based on dielectric constant information of the lubricating oil contained in the first signal, and driving the display device to display the corresponding dielectric constant of the lubricating oil; and receiving a second signal emitted by the ultrasonic liquid level sensor, transmitting a second display drive signal to the display device based on liquid level information of the lubricating oil contained in the second signal, and driving the display device to display the corresponding liquid level of the lubricating oil. The method for monitoring the lubricating oil in a vacuum pump can monitor the state of the lubricating oil in the vacuum pump in real time and accurately, and display it intuitively, thereby improving the accuracy of determining the operating state of the vacuum pump.

The invention relates to a diagnostic method for determining the oil quality of an engine oil for an internal combustion engine (2) of a vehicle, wherein the engine oil is or is made with a fluorescent dye, and wherein the internal combustion engine (2) is located in an engine oil circuit (1) in which a detector (6), in particular an LED-based fluorescence sensor, is arranged for detecting a fluorescence intensity, comprising the steps: - if an engine oil change has been detected, an oil quality test routine is started in which the fluorescence intensity is recorded with the detector (6) and stored as the initial intensity value, - repeated, in particular continuous or regular, measurement of the fluorescence intensity of the engine oil as the current intensity value, and - if a determined current intensity value is less than or equal to approximately 10 percent of the initial intensity value, a message is issued indicating that an engine oil change is required.

This invention discloses an intelligent oil pump oil quality monitoring method based on multi-source data fusion, belonging to the field of transformers. The method includes multi-source data acquisition, data processing, data fusion, result display, and long-distance data transmission: First, multi-dimensional raw data of the oil pump pipeline is collected through micro-water, pressure, and flow sensors and transmitted to a microcontroller control board; then, the raw data is denoised and filtered to obtain a standardized dataset; subsequently, a multi-source data fusion algorithm combining weighted average method and fuzzy logic is used to process the dataset, constructing an oil quality status assessment model to determine whether the oil quality has deteriorated; next, the monitoring results are visualized locally; finally, long-distance transmission of monitoring data and local-remote data synchronization are achieved. This invention improves the accuracy of oil quality monitoring through multi-parameter collaborative monitoring and data fusion, realizing local real-time display and remote real-time monitoring of oil quality status, adapting to the operational needs of transformer maintenance sites.

The present invention relates to a method for monitoring the engine oil health condition of a vehicle, the method comprising the steps of: obtaining input operational data, the input operational data being a subset of engine related operational data; predicting an oil quality grade characterizing the engine oil health condition using a trained model based on the obtained input operational data; and outputting the predicted oil quality grade, wherein the model input of the trained model is filtered from the engine related operational data by performing a correlation analysis of the engine related operational data and associated engine oil periodic oil sample analysis test results.

The present disclosure proposes an electronic control unit (ECU (101)) adapted to monitor and indicate oil quality in a vehicle. The vehicle comprises an ECU (101), an oil pump (102) and at least one pressure sensor (103) in an outlet line of the oil pump (102). In step 201, the ECU stores ideal values of pressure in the oil pump outlet line for a set of engine operating conditions. In step 202, the ECU receives instantaneous values of pressure from the pressure sensor (103) for the set of engine operating conditions. In step 203, the ECU (101) compares the ideal values with the instantaneous values above a set of predefined activation conditions to determine a deviation. In step 204, the ECU (101) analyzes the deviation to calculate a correction factor. In step 205, the ECU (101) operates the oil pump (102) based on the calculated correction factor.

This invention relates to the field of spectral analysis technology and discloses a method for quality detection of safflower seed oil diglyceride oil based on spectral analysis. The method first acquires sample spectral acquisition parameters and raw spectral data, which contains characteristic absorption peak band information and is acquired according to a preset scanning mode. The raw spectral data is preprocessed to extract characteristic absorption difference points and generate a feature mapping set. Based on the feature mapping set, effective detection intervals are divided, and spectral acquisition parameters are adjusted to form a calibration parameter set. The adjusted spectral data is aligned to generate multi-dimensional spectral data. The data is then input into an absorption peak matching model for characteristic absorption peak matching processing to identify feature markers and quality anomaly markers, generating a quality judgment result. After the result is generated, the equipment operating status and environmental parameters are monitored in real time, and the calibration parameter set is dynamically adjusted to adapt to environmental changes. This method can accurately detect the quality of safflower seed oil diglyceride oil, improving detection efficiency and reliability.

The invention provides a heavy-duty gas turbine fault diagnosis method and system based on oil quality, and the method comprises the steps: collecting each quality index parameter of oil in a heavy-duty gas turbine control oil system, and carrying out the preprocessing of each quality index parameter, and obtaining each preprocessed quality index parameter; performing feature analysis on each preprocessed quality index parameter to screen out a fault feature parameter, and determining a degradation trend value corresponding to each preprocessed quality index parameter; and inputting the fault characteristic parameters and the deterioration trend value into a fault monitoring model which is trained firstly to obtain the fault type of the heavy gas turbine control oil system. According to the technical scheme, the control oil quality degradation trend can be determined, and the fault type of the heavy gas turbine control oil system is accurately judged based on the degradation trend.

The invention provides an oil liquid detection method, electronic equipment, a vehicle and a storage medium, the method is applied to the technical field of transmission maintenance, and the method comprises the steps that the current oil liquid flow velocity corresponding to a target oil duct in a target transmission is detected; calculating a first oil viscosity value according to the current oil flow rate; a standard oil viscosity value and a standard deviation value corresponding to the current working parameters are determined, the standard deviation value refers to the deviation between the standard oil viscosity value and a theoretical oil viscosity value corresponding to the current working parameters, and the standard oil viscosity value is obtained in a direct measurement mode in a standard experimental environment; the theoretical oil viscosity value is obtained in a theoretical calculation mode in a standard experimental environment; and determining the oil quality state of the target transmission according to the standard oil viscosity value, the standard deviation value and the first oil viscosity value. According to the method, the quality oil of the transmission can be effectively evaluated, so that accurate oil maintenance suggestions can be provided.

The application discloses an environment-friendly treatment equipment and treatment method for oil drilling waste mud, which comprises a heat preservation frame, a heat preservation cabinet is arranged at the top of the heat preservation frame, a reaction treatment cylinder for reaction treatment of the mud is arranged in the heat preservation cabinet, a heating mechanism for heating the reaction treatment cylinder is arranged in the heat preservation frame, a discharge accelerating mechanism for accelerating the discharge of water vapor in the mud in the reaction treatment cylinder is arranged in the heat preservation cabinet, a top frame is arranged at the top of the heat preservation cabinet, a through pipe is arranged on the top frame, one end of the through pipe penetrates into the heat preservation cabinet and is connected with a gland, and the gland covers the top of the reaction treatment cylinder. The oil quality in the mud can be effectively reduced, the influence of drying and dehydration on the oil quality is reduced, the mud and the flocculating powder are accelerated to be held and precipitated, the oil quality layer is beneficial to float, the flocculating powder is more effectively mixed with the mud, compared with the addition of the flocculating liquid agent mixed with water, the dehydration amount and the dehydration difficulty are reduced, and the heating time is reduced.

The invention discloses a multifunctional conduction oil injecting and discharging system which comprises a conduction oil storage tank (1), a conduction oil expansion tank (2), a conduction oil barrel (3), an oil conveying mother pipe (3) and an oil control circuit. The heat-conducting oil barrel (3) is connected with the heat-conducting oil storage tank (1) through a first oil conveying pipeline; the heat-conducting oil barrel (3) is connected with the heat-conducting oil expansion tank (2) through a second oil conveying pipeline; the heat conduction oil expansion tank (2) is connected with the liquid conveying mother pipe (5) through a third oil conveying pipeline; valve groups (7-13) are arranged among the first oil conveying pipeline, the second oil conveying pipeline and the third oil conveying pipeline; the input end of the conduction oil barrel is connected with an oil injection pump (4); wherein the oil control circuit realizes oil injection and oil drainage processes by adjusting opening of the valve, oil injection and oil drainage functions are realized through control of the oil control circuit, and the problems that oil drainage is not thorough, old oil remains and is mixed with new oil, and oil quality is affected are fundamentally solved.

The invention provides a dynamic hierarchical management method and device based on steam turbine adaptive indexes, and the method comprises the steps: collecting monitoring data reflecting the running state of a steam turbine in a gas-steam combined cycle combined heat and power generation unit in real time, the monitoring data at least comprising oil quality parameters and oil temperature parameters of lubricating oil; determining a current self-adaptive health index of the steam turbine based on the monitoring data; determining a current state level corresponding to the current self-adaptive health index based on the configured mapping relationship between different steam turbine self-adaptive health indexes and different state levels; different state levels correspond to different management strategies; and based on the current state grade, a control instruction of a corresponding management strategy is generated and executed so as to dynamically adjust the operation mode of the SSS clutch. According to the method, intelligent optimization and fault advanced early warning of the running mode of the SSS clutch are achieved.

The utility model discloses a kind of impurity filtering devices for oil exploitation, it is related to oil exploitation field, including filter type protection structure, the inside of filter type protection structure is provided with combined rotary component, the upper thread of filter type protection structure is installed with suspension type filter component;The suspension type filter component contains top cover, cooperate by suspension type filter component internal structure and filter type protection structure internal structure, it is convenient to carry out multistage filtration to oil, improve oil quality;The combined rotary component contains rotating rod.The impurity filtering device for oil exploitation, the larger impurities contained in petroleum are filtered and blocked by second filter screen frame, then cooperate with stirring rod agitation and first filter screen frame are used in cooperation, to filter operation for the fine impurities contained in petroleum, reach device when using to carry out classification treatment to oil, to avoid impurity blockage, affect device filtration efficiency.

The invention provides an oil supply system for driving low-pressure regulating oil of a steam turbine and a working method of the oil supply system, and aims to solve the problem of reliability of a low-pressure regulating oil supply system in the prior art. The invention relates to the field of steam turbine driving, in particular to a low-pressure adjusting oil tank, an oil purifying device, a lubricating oil packaging oil tank, an oil overflowing pipeline, an oil supplementing pipeline and accessories, in the normal running process of a steam turbine, the low-pressure adjusting oil tank and the lubricating oil packaging oil tank are independent and supply oil respectively, and the oil cleanliness is controlled respectively. Particularly, the low-pressure adjusting oil tank is connected with an independent oil purification device, so that the on-line oil treatment function of an adjusting oil source is realized. Risks of pollution, failure and the like of a low-pressure adjusting oil supply system can be effectively reduced, cleanliness control is facilitated, system reliability is improved, the servo valve of the adjusting part sleeve is prevented from being jammed, lubricating oil and adjusting oil system oil circulation can be carried out respectively, and the unit oil circulation period is shortened.

The invention discloses an online purification device and method for insulating oil in a high-voltage cable terminal, and relates to the technical field of power grids, the online purification device comprises an intelligent monitoring unit, a circular flow unit, a purification unit and an insulating oil supplementing unit; the intelligent monitoring unit is used for monitoring the oil quality and the oil quantity of insulating oil in the cable terminal in real time, the circular flowing unit is used for promoting the insulating oil to circularly flow between the cable terminal and the purifying unit, and the purifying unit is used for purifying the insulating oil which circularly flows; the insulating oil supplementing unit is used for supplementing insulating oil into the pipeline of the circulating flow unit and the cable terminal; when the intelligent monitoring unit detects that the oil quantity in the cable terminal is smaller than a set threshold value, the insulating oil in the insulating oil supplementing unit is conveyed into the cable terminal through the circular flowing unit. According to the invention, the internal insulating oil can be purified on line without power failure, so that time and labor are saved, and the maintenance cost can be reduced.