A mobile device for monitoring trace moisture in oil and its monitoring method

Abstract

The present invention discloses a mobile device for monitoring trace moisture in oil and its monitoring method, which includes a housing and a cabinet door. The housing and the cabinet door are hinged. The housing is provided with rollers, and the cabinet door is provided with a display control module. The housing is provided with an alarm unit. Inside the housing, there is a titration cell, which is provided with electrode solution, a magnetic stirrer, a cathode cell and a detection electrode. The cathode cell is provided with a through hole, and the titration cell is provided with a liquid replenishing unit. The titration cell is connected to the right side of a four-way valve. The left side of the four-way valve is provided with a sampling pipeline, and the sampling pipeline is provided with an oil filtering unit. The oil filtering unit is provided with a storage unit. The upper end of the four-way valve is provided with an automatic sampling needle, and the automatic sampling needle is provided with a motor. The lower end of the four-way valve is provided with a waste liquid unit. It further includes a terminal system. The alarm unit, the liquid replenishing unit, the oil filtering unit, the waste liquid unit, the four-way valve, the automatic sampling needle, the motor and the terminal system are electrically connected to the display control module through wires. The present invention realizes online monitoring and oil filtering, takes different treatment measures according to the monitoring results, and timely notifies the staff.

Description

Technical Field

[0001] The present invention belongs to the technical field of oil quality analysis, and particularly relates to a mobile device for monitoring trace moisture in oil and a monitoring method thereof. Background Art

[0002] The determination of trace moisture in oil is one of the most important indicators in oil performance testing. Conventionally, there are two methods for determining trace moisture in oil: on-line and off-line. Currently, most of the petroleum and power industries adopt the off-line measurement method, which has disadvantages such as long analysis time and many influencing factors. Existing on-line moisture meters have a high analysis range, but low measurement accuracy, high detection limit, and cannot accurately measure trace moisture in the milligram or even microgram level in oil. Moreover, they cannot process oil with excessive moisture content and give timely alarms. Summary of the Invention

[0003] The purpose of the present invention is to provide a mobile device for monitoring trace moisture in oil and a monitoring method thereof, which solve the problems of low measurement accuracy, high detection limit, easy contamination in off-line measurement, and lack of timeliness of data in the existing monitoring devices, and realize on-line monitoring and on-line filtration of trace moisture in oil.

[0004] The technical solution of the present invention is realized as follows:

[0005] A mobile device for monitoring trace moisture in oil includes a housing and a cabinet door. The housing and the cabinet door are hinged. The bottom of the housing is provided with a plurality of rollers. The cabinet door is provided with a display control module. The top of the housing is provided with an alarm unit. A titration cell is arranged inside the housing. An electrode solution, a magnetic stirrer, a cathode cell, and a detection electrode are arranged inside the titration cell. A through hole is provided at the bottom of the cathode cell to communicate with the titration cell. A liquid replenishing unit is arranged at the upper end of the titration cell. The titration cell is connected to the right side of a four-way valve through a sampling pipeline. A sampling pipeline is arranged on the left side of the four-way valve. An oil filtering unit is arranged on the sampling pipeline. A storage unit is arranged on the oil filtering unit. An automatic sampling needle is arranged at the upper end of the four-way valve. A motor is arranged at the upper end of the automatic sampling needle and is connected thereto. A waste liquid unit is arranged at the lower end of the four-way valve. It further includes a remote terminal system. The alarm unit, the liquid replenishing unit, the oil filtering unit, the waste liquid unit, the four-way valve, the automatic sampling needle, the motor, and the terminal system are respectively electrically connected to the display control module through wires.

[0006] A further technical solution is that the alarm unit includes a buzzer and a plurality of flashlights. The buzzer and the flashlights are respectively fixed on the top of the housing. The flashlights include a green flashlight, a yellow flashlight, and a red flashlight. The buzzer and the flashlights are respectively electrically connected to the display control module through wires.

[0007] A further technical solution is that the liquid replenishing unit includes an electrode liquid bottle, the electrode liquid bottle is fixed in the housing, the electrode liquid bottle is connected to the titration cell through a replenishing pipeline, a replenishing ball valve is provided on the replenishing pipeline, and the replenishing ball valve is electrically connected to the display control module through a wire.

[0008] A further technical solution is that the oil filtering unit includes an oil filter, the oil filter is fixed in the housing, the oil filter is connected to the sampling pipeline through an oil filtering pipeline, an oil filtering ball valve is provided on the oil filtering pipeline, and the oil filtering ball valve is electrically connected to the display control module through a wire.

[0009] A further technical solution is that the storage unit includes an oil storage barrel, the oil storage barrel is fixed in the housing, the oil storage barrel is connected to the oil outlet of the oil filter through an oil storage pipeline, an oil storage ball valve is provided on the oil storage pipeline, an oil outlet pipeline is provided on the oil storage barrel, an oil outlet ball valve is provided on the oil outlet pipeline, and the oil storage ball valve and the oil outlet ball valve are electrically connected to the display control module through a wire.

[0010] A further technical solution is that the waste liquid unit includes a waste liquid digestion tank, the waste liquid digestion tank is connected to the four-way valve through a discharge pipeline, the waste liquid digestion tank is connected to the titration cell through a waste liquid pipeline, a waste liquid ball valve is provided on the waste liquid pipeline, and the waste liquid ball valve is electrically connected to the display control module through a wire.

[0011] A further technical solution is that an exhaust pipe is provided on the titration cell, and silica gel is provided in the exhaust pipe.

[0012] A further technical solution is that a UPS DC power supply for power supply is provided in the housing.

[0013] A further technical solution is that the display control module includes an LED display screen, a data converter and a control chip, and the LED display screen, the data converter and the control chip are electrically connected through wires respectively.

[0014] A mobile method for monitoring trace moisture in oil includes:

[0015] S1. The sampling pipeline is connected to an external sample oil, and the display control module controls the detection electrode to extract the external sample oil several times a day.

[0016] S2. The display control module controls the four-way valve and the automatic sampling needle to extract a quantitative volume of sample oil, and then discharges the sample oil to wash the needle.

[0017] S3. After the needle washing is completed, the display control module controls the four-way valve and the automatic sampling needle to extract the sample oil once again, and then quantitatively injects the extracted sample oil into the titration cell through the display control module to control the four-way valve and the automatic sampling needle, for sample oil injection;

[0018] S4. After the sample oil injection is completed, the detection electrode re-detects the conductance information and feeds it back to the display control module. The display control module calculates the trace moisture content in the sample oil according to the Karl Fischer coulometric method for moisture determination;

[0019] S5. Classify the calculation results into several modes according to the moisture content, including:

[0020] No alarm: When the moisture is between 0 - 85 ppm, the display control module controls the green flash lamp to be constantly on;

[0021] Mild alarm: When the moisture is between 85 - 99 ppm, the display control module controls the yellow flash lamp to flash, the buzzer starts, and the display control module feeds back the information to the terminal system;

[0022] Severe alarm: When the moisture > 100 ppm, the display control module controls the red flash lamp to flash, the buzzer starts, the display control module feeds back the information to the terminal system, and the staff promptly shuts down the equipment for the sample oil to be measured, then starts the oil filtering unit to filter the sample oil. The filtered sample oil is stored in the storage unit, and after complete filtering, it is discharged into the sample oil equipment;

[0023] S6. When it is detected that the electrode solution fails, the display control module controls the waste liquid unit to discharge the waste liquid in the titration cell, and then the display control module controls the liquid replenishment unit to replenish the liquid.

[0024] The beneficial effects of the present invention are as follows:

[0025] 1. Realize on-line sampling and analysis of oil products with high analysis accuracy.

[0026] 2. The replacement of the electrode solution is simple, convenient and fast.

[0027] 3. On-line monitor the moisture content in the oil, and take different treatment measures according to the measured moisture content to realize on-line oil filtering, timely remind relevant staff, and avoid damage to the equipment caused by sample oil with excessive moisture.

[0028] 4. Toxic and harmful substances are directly discharged into the environment after being digested in the waste liquid digestion tank, and the generated waste is non-toxic and harmless.

[0029] 5. The storage unit can store the sample oil, avoiding the direct discharge of the filtered sample oil into the sample oil equipment and mixing with the original sample oil, with better filtering effect and more sufficient filtering.

[0030] 6. The present invention is convenient to move and has strong practicability. It is applicable to the monitoring of small sample oil equipment and is suitable for wide promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only the preferred embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0032] Figure 1 is the structural schematic diagram of the present invention;

[0033] Figure 2 is the schematic diagram of the reaction of iodine being reduced by sulfur dioxide of the present invention;

[0034] Figure 3 is the schematic diagram of the electrode reaction during the electrolysis process of the present invention;

[0035] Figure 4 is the schematic diagram of the calculation formula for the moisture in the sample oil of the present invention.

[0036] In the figure, 1. Display control module, 2. Cabinet door, 3. Sampling pipeline, 4. Oil filter ball valve, 5. Oil filter pipeline, 6. Motor, 7. Oil filter, 8. Buzzer, 9. Oil storage ball valve, 10. Oil storage pipeline, 11. Green flash lamp, 12. Yellow flash lamp, 13. Red flash lamp, 14. Oil storage barrel, 15. Oil outlet ball valve, 16. Oil outlet pipeline, 17. Supplementary pipeline, 18. Supplementary ball valve, 19. Cathode cell, 20. Detection electrode, 21. Exhaust pipe, 22. Titration cell, 23. Through hole, 24. Magnetic stirrer, 25. Waste liquid pipeline, 26. Waste liquid ball valve, 27. Roller, 28. UPS DC power supply, 29. Waste liquid digestion cell, 30. Shell, 31. Sampling pipeline, 32. Discharge pipeline, 33. Four-way valve, 34. Automatic sampling needle. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0037] In order to better understand the technical content of the present invention, specific embodiments are provided below, and the present invention will be further described in conjunction with the drawings.

[0038] See Figures 1 to 4, A mobile device for monitoring trace moisture in oil, comprising a housing 30 and a cabinet door 2. The housing 30 is designed in a cuboid structure; the cabinet door 2 is a frame welded by four stainless steel rods, and a transparent glass is inlaid on the frame. The transparent glass is provided to facilitate viewing the internal situation through the cabinet door 2; four rollers 27 are provided at the four corners of the bottom of the housing 30 to facilitate the movement of the device; the housing 30 and the cabinet door 2 are hinged, and the hinged manner facilitates the opening and closing of the cabinet door 2; a display control module 1 is provided on the cabinet door 2. The display control module 1 is installed in the upper middle part of the cabinet door 2 and is displayed on the control screen. The analysis result is transmitted to a remote terminal system through a wire; an alarm unit is provided at the top of the housing 30. The alarm unit is used to give corresponding alarms according to the monitored moisture content result; a titration cell 22 is provided inside the housing 30. The titration cell 22 contains electrode solution inside, a cathode cell 19 and a detection electrode 20 are inserted inside, and a magnetic stirrer 24 is provided at the bottom. The cathode cell 19 and the detection electrode 20 are used to detect trace moisture in oil; a through hole 23 is provided at the bottom of the cathode cell 19 to communicate with the titration cell 22. The through hole 23 is used to balance the liquid levels of the electrode solutions in the cathode cell 19 and the titration cell 22 and keep the two liquid levels consistent; a liquid replenishing unit is provided at the upper end of the titration cell 22. The liquid replenishing unit is used to replenish the electrode solution; the titration cell 22 is connected to the right side of a four-way valve 33 through a sampling pipeline 31 for transmitting the sampled oil product to achieve the sampling of the sample oil; a sampling pipeline 3 is provided on the left side of the four-way valve 33 for connecting to an external sample oil to achieve monitoring; a oil filtering unit is provided on the sampling pipeline 3. The oil filtering unit is used to filter the oil with excessive moisture content; a storage unit is provided on the oil filtering unit. The storage unit is used to store the filtered oil to prevent the filtered sample oil from directly returning to the original sample oil equipment; an automatic sampling needle 34 is provided at the upper end of the four-way valve 33. The automatic sampling needle 34 is used for the automatic quantitative suction and discharge of samples; a motor 6 is provided at the upper end of the automatic sampling needle 34. Preferably, a stepping motor 6 is used, and the stepping motor 6 is used to drive the automatic sampling needle 34 for accurate sampling; a waste liquid unit is provided at the lower end of the four-way valve 33. The waste liquid unit is used to receive the expired electrode solution and waste oil and has a digestion function, which can digest the hazardous waste oil and electrode solution and directly discharge it without pollution; it further includes a remote terminal system. The terminal system can be a mobile phone or a computer, which is used to notify remote staff in time; the alarm unit, the liquid replenishing unit, the oil filtering unit, the waste liquid unit, the four-way valve 33, the automatic sampling needle 34, the motor 6 and the terminal system are respectively electrically connected to the display control module 1 through wires, Figure 1 In the figure, the dotted lines represent wires.

[0039] Specifically, the alarm unit includes a buzzer 8 and a plurality of flash lights, which are respectively fixed on the top of the shell 30 and are designed at the top to facilitate the staff to find the monitoring information of the sample oil; the flash lights include a green flash light 11, a yellow flash light 12, and a red flash light 13, which are designed in a variety of colors so that flash lights of different colors correspond to different modes, which is convenient for the staff to identify; the buzzer 8 and the flash lights are respectively electrically connected to the display screen control module 1 through wires.

[0040] Specifically, the rehydration unit includes an electrode liquid bottle, which is fixed in the shell 30. The electrode liquid bottle is connected to the titration cell 22 via a replenishing pipe 17. The electrode liquid bottle is used to store the electrode liquid for easy replacement. A replenishing ball valve 18 is provided on the replenishing pipe 17. The replenishing ball valve 18 is used to control the replacement of the electrode liquid. The replenishing ball valve 18 is electrically connected to the display screen control module 1 via a wire.

[0041] Specifically, the oil filter unit includes an oil filter 7, which is fixedly installed in the shell 30 and located above the sampling pipe 3. The oil filter 7 is connected to the sampling pipe 3 through the oil filter pipe 5. The oil filter 7 can select a suitable model according to actual needs; the oil filter pipe 5 is provided with an oil filter ball valve 4, and the oil filter ball valve 4 is electrically connected to the display screen control module 1 through a wire. The oil filter ball valve 4 is used to control the opening or closing of the oil filter.

[0042] Specifically, the storage unit includes an oil storage barrel 14, which is fixedly installed in the shell 30 and is located on the right side of the oil filter 7. The oil storage barrel 14 is connected to the oil outlet of the oil filter 7 through an oil storage pipe 10. The oil storage pipe 10 is provided with an oil storage ball valve 9, and the oil storage ball valve 9 is used to control the sample oil to flow into the oil storage barrel 14; the oil storage barrel 14 is provided with an oil outlet pipe 16, and the oil outlet pipe 16 is provided with an oil outlet ball valve 15, which connects the oil outlet pipe 16 and the sample oil equipment, and controls the oil outlet ball valve 15 through the display screen control module 1, so as to control the filtered sample oil to flow into the sample oil equipment; the oil storage ball valve 9 and the oil outlet ball valve 15 are electrically connected to the display screen control module 1 through wires.

[0043] Specifically, the waste liquid unit includes a waste liquid digestion tank 29, which is connected to a four-way valve 33 via a discharge pipe 32. The waste liquid digestion tank 29 is connected to a titration tank 22 via a waste liquid pipe 25. A waste liquid ball valve 26 is provided on the waste liquid pipe 25. The waste liquid ball valve 26 is electrically connected to the display screen control module 1 via a wire. The waste liquid ball valve 26 is used to control the discharge of failed electrode liquid and waste oil.

[0044] Specifically, an exhaust pipe 21 is provided on the titration cell 22 , and the exhaust pipe 21 is used to connect the titration cell 22 with the air to maintain the air pressure balance inside and outside the titration cell 22 ; silica gel is provided in the exhaust pipe 21 , and the built-in silica gel prevents moisture in the air from entering the titration cell 22 .

[0045] Specifically, a UPS DC power supply 28 for power supply is disposed in the housing 30. The UPS DC power supply 28 provides power for the entire device, and a suitable power supply can be selected as needed.

[0046] Specifically, the display control module 1 includes an LED display, a data converter and a control chip. The LED display is used to drive the control chip to make corresponding instructions; the control chip is used to process the instructions transmitted by the data converter and calculate the trace moisture content in the oil; the data converter is used to convert and parse the transmission protocol signal and send it to the main control chip; the LED display, the data converter and the control chip are electrically connected through wires.

[0047] A mobile method for monitoring trace moisture in oil, comprising:

[0048] S1, the sampling pipeline 3 is connected to the external sample oil equipment, and the display screen control module 1 controls the detection electrode 20 to extract the external sample oil twice a day;

[0049] S2, the display screen control module 1 controls the four-way valve 33 and the automatic sampling needle 34 to extract a quantitative volume of sample oil, and then discharges the sample oil to wash the needle;

[0050] S3, after the needle washing is completed, the display screen control module 1 controls the four-way valve 33 and the automatic injection needle 34 to extract the sample oil again, and then controls the four-way valve 33 and the automatic injection needle 34 through the display screen control module 1 to quantitatively inject the extracted sample oil into the titration cell 22 to perform sample oil sampling;

[0051] S4, after the sample oil is injected, the detection electrode 20 re-detects the conductivity information and feeds it back to the display screen control module 1, and the display screen control module 1 calculates the trace water content in the sample oil according to the Karl Fischer coulometric method for determining water content;

[0052] S5. The calculation results are divided into several modes according to the moisture content, including:

[0053] No alarm: when the moisture content is between 0-85ppm, the display screen control module 1 controls the green flash light 11 to be always on;

[0054] Mild alarm: When the moisture content is between 85-99ppm, the display screen control module 1 controls the yellow flash light 12 to flash, the buzzer 8 is activated, and the display screen control module 1 feeds back the information to the terminal system;

[0055] Severe alarm: moisture>100ppm, the display screen control module 1 controls the red flash light 13 to flash, the buzzer 8 is activated, the display screen control module 1 feeds back information to the terminal system, the staff promptly shuts down the sample oil equipment to be tested, and then starts the oil filter unit to filter the sample oil. The filtered sample oil is stored in the storage unit and discharged to the sample oil equipment after complete filtration;

[0056] S6. After detecting the failure of the electrode solution, the display control module 1 controls the waste liquid unit to discharge the waste liquid in the titration cell 22, and then the display control module 1 controls the replenishing unit to replenish the liquid.

[0057] The working principle of the present invention:

[0058] Connect the sampling pipeline 3 of this device to the sample oil equipment to be monitored. Preferably, set the display control module 1 to extract the sample oil 2 times regularly every day; when starting, the display control module 1 controls the four-way valve 33 to connect the sampling pipeline 3, and the automatic sampling needle 34 starts to wash the needle with the sample oil. The motor 6 starts to rotate according to the set stroke, drives the automatic sampling needle 34 to accurately extract a quantitative volume of sample oil, and then the signal is transmitted to the display control module 1. The display control module 1 controls the four-way valve 33 to disconnect the sampling pipeline 3 and the automatic sampling needle 34. Then the display control module 1 controls the four-way valve 33 to connect the discharge pipeline 32 and the automatic sampling needle 34. Then the motor 6 starts to rotate according to the set stroke, drives the automatic sampling needle 34 to discharge the sample oil, and realizes the function of washing the needle with the sample oil;

[0059] After the needle washing is completed, the signal is transmitted to the display control module 1 to control the four-way valve 33 to connect the sampling pipeline 3 and the automatic sampling needle 34. The motor 6 starts to rotate according to the set stroke, drives the automatic sampling needle 34 to accurately extract the sample oil, and then the signal is transmitted to the display control module 1. The four-way valve 33 is controlled to disconnect the sampling pipeline 3 and the automatic sampling needle 34. The display control module 1 controls the four-way valve 33 to connect the injection pipeline 31 and the automatic sampling needle 34. Then the motor 6 starts to rotate according to the set stroke, drives the automatic sampling needle 34 to quickly inject a quantitative volume of sample oil into the electrode solution in the titration cell 22 to complete the sample injection;

[0060] Then the motor 6 transmits the signal to the display control module 1, and controls the detection electrode 20 to start detecting the conductance information in the electrode solution and transmits the conductance information to the display control module 1 through the wire for trace moisture calculation. The principle is to use the Karl Fischer coulometric method for determining moisture:

[0061] Its reaction formula is as Figure 2 shown. Based on the presence of water, iodine is reduced by sulfur dioxide, and in the presence of pyridine and methanol, pyridine hydroiodide and pyridinium methyl sulfate are formed;

[0062] Its reaction formula is as Figure 3 shown, and during the electrolysis process, the electrode reacts;

[0063] The generated iodine reacts with the moisture in the sample oil to form hydroiodic acid until all the moisture reacts completely. The end point of the reaction is indicated by a pair of platinum electrodes that make up the detection electrode 20;

[0064] The calculation formula is as follows Figure 4 As shown, during the whole process, sulfur dioxide is consumed, and the consumption amount is equal to the molar number of water. According to Faraday's electrolysis law, the electric quantity used in electrolysis is proportional to the amount of substance of iodine. That is, when electrolyzing 1 mol of iodine, 1 mol of water is consumed, and 2 times of 96493 C of electric quantity is required, so as to calculate the moisture content of the sample oil;

[0065] According to the trace moisture content in the sample oil, the calculation results are divided into several modes:

[0066] No alarm: When the moisture is between 0 - 85 ppm, the display control module 1 controls the green flash lamp 11 to be always on;

[0067] Mild alarm: When the moisture is between 85 - 99 ppm, the display control module 1 controls the yellow flash lamp 12 to flash, the buzzer 8 is started, and the display control module 1 feeds back the information to the terminal system to timely remind the staff to pay attention to the change of the moisture content in the oil;

[0068] Severe alarm: When the moisture > 100 ppm, the display control module 1 controls the red flash lamp 13 to flash, the buzzer 8 is started, and the display control module 1 feeds back the information to the terminal system. The on-site staff timely closes the sample oil equipment to be measured; the staff operates the display control module 1 to open the oil filter ball valve 4 on the oil filter pipeline 5, closes the four-way valve 33, and filters the sample oil; the display control module 1 opens the storage oil ball valve 9 to transport the filtered sample oil to the storage oil barrel 14 through the storage pipeline; when the sample oil in the sample oil equipment is completely filtered, connect the sample oil equipment through the oil outlet pipeline 16, and through the display control module 1, open the oil outlet ball valve 15 on the oil outlet pipeline 16 to discharge the completely filtered sample oil into the sample oil equipment;

[0069] When the electrode liquid in the titration cell 22 fails, the display control module 1 is used to open the waste liquid ball valve 26 to discharge the waste liquid into the waste liquid digestion pool 29, and the display control module 1 is used to open the replenishment ball valve 18 on the electrode liquid bottle to replenish new electrode liquid; the UPS DC power supply 28 provides power for each component; the roller 27 facilitates the movement of the whole monitoring device for mobile on-line monitoring as required; the magnetic stirrer 24 can be used to stir the electrode liquid to make the inside of the electrode liquid fully mixed and provide power for the full mixing of the electrode liquid and the sample oil for full reaction.

[0070] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A mobile micro moisture in oil monitoring device, comprising a housing and a cabinet door, wherein the housing and the cabinet door are hinged, and a plurality of rollers are provided at the bottom of the housing, characterized in that, A display control module is provided on the cabinet door. An alarm unit is provided at the top of the housing. A titration cell is provided inside the housing. An electrode solution, a magnetic stirrer, a cathode cell, and a detection electrode are provided inside the titration cell. A through hole is provided at the bottom of the cathode cell to communicate with the titration cell. A liquid replenishing unit is provided at the upper end of the titration cell. The titration cell is connected to the right side of a four-way valve through a sampling pipeline. A sampling pipeline is provided on the left side of the four-way valve. An oil filtering unit is provided on the sampling pipeline. A storage unit is provided on the oil filtering unit. The oil filtering unit is used to filter the sample oil taken through the sampling pipeline. The storage unit is used to store the sample oil filtered by the oil filtering unit. An automatic sampling needle is provided at the upper end of the four-way valve. A motor is provided at the upper end of the automatic sampling needle and is connected thereto. A waste liquid unit is provided at the lower end of the four-way valve. A remote terminal system is also included. The alarm unit, the liquid replenishing unit, the oil filtering unit, the waste liquid unit, the four-way valve, the automatic sampling needle, the motor, and the terminal system are respectively electrically connected to the display control module through wires; the four-way valve and the automatic sampling needle are controlled by the display control module to quantitatively inject the extracted sample oil into the titration cell.

2. The mobile in-oil trace moisture monitoring device according to claim 1, wherein The alarm unit includes a buzzer and a plurality of flashlights. The buzzer and the flashlights are respectively fixed on the top of the housing. The flashlights include a green flashlight, a yellow flashlight, and a red flashlight. The buzzer and the flashlights are respectively electrically connected to the display control module through wires.

3. The mobile micro water content monitoring device in oil according to claim 1, characterized in that, The liquid replenishing unit includes an electrode solution bottle. The electrode solution bottle is fixed inside the housing. The electrode solution bottle is connected to the titration cell through a replenishing pipeline. A replenishing ball valve is provided on the replenishing pipeline. The replenishing ball valve is electrically connected to the display control module through a wire.

4. A mobile micro moisture in oil monitoring device according to claim 1, characterized in that, The oil filtering unit includes an oil filter. The oil filter is fixed inside the housing. The oil filter is connected to the sampling pipeline through an oil filtering pipeline. An oil filtering ball valve is provided on the oil filtering pipeline. The oil filtering ball valve is electrically connected to the display control module through a wire.

5. A mobile in-oil trace moisture monitoring device according to claim 1, characterized in that, The storage unit includes an oil storage barrel. The oil storage barrel is fixed inside the housing. The oil storage barrel is connected to the oil outlet of the oil filter through an oil storage pipeline. An oil storage ball valve is provided on the oil storage pipeline. An oil outlet pipeline is provided on the oil storage barrel. An oil outlet ball valve is provided on the oil outlet pipeline. The oil storage ball valve and the oil outlet ball valve are electrically connected to the display control module through wires.

6. The mobile in-oil trace moisture monitoring device according to claim 1, wherein, The waste liquid unit includes a waste liquid digestion tank. The waste liquid digestion tank is connected to the four-way valve through a discharge pipeline. The waste liquid digestion tank is connected to the titration cell through a waste liquid pipeline. A waste liquid ball valve is provided on the waste liquid pipeline. The waste liquid ball valve is electrically connected to the display control module through a wire.

7. The mobile micro water content monitoring device in oil according to claim 1, characterized in that, An exhaust pipe is provided on the titration cell. Silica gel is provided inside the exhaust pipe.

8. The mobile trace moisture monitoring device in oil according to claim 1, characterized in that, A UPS DC power supply for power supply is provided inside the housing.

9. The mobile in-oil trace moisture monitoring device according to claim 1, characterized in that, The display control module includes an LED display screen, a data converter, and a control chip. The LED display screen, the data converter, and the control chip are respectively electrically connected through wires.

10. A method for monitoring trace moisture in oil in a mobile manner, characterized in that, It is implemented by using the mobile micro moisture monitoring device for oil described in any one of claims 1 to 9, wherein the mobile micro moisture monitoring method for oil includes: S1. Connect the sampling pipeline to the external sample oil, and the display control module controls the detection electrode to extract the external sample oil several times every day; S2. The display control module controls the four-way valve and the automatic sampling needle to extract a quantitative volume of sample oil, and then discharges the sample oil and performs needle washing; S3. After the needle washing is completed, the display control module controls the four-way valve and the automatic sampling needle to extract the sample oil once again, and then controls the four-way valve and the automatic sampling needle by the display control module to quantitatively inject the extracted sample oil into the titration cell for sample oil injection; S4. After the sample oil injection is completed, the detection electrode re-detects the conductance information and feeds it back to the display control module, and the display control module calculates the micro moisture content in the sample oil according to the Karl Fischer coulometric method for determining moisture; S5. Classify the calculation results into several modes according to the moisture content, including: No alarm: When the moisture is between 0 - 85 ppm, the display control module controls the green flash lamp to be constantly on; Minor alarm: When the moisture is between 85 - 99 ppm, the display control module controls the yellow flash lamp to flash, the buzzer starts, and the display control module feeds back the information to the terminal system; Severe alarm: When the moisture > 100 ppm, the display control module controls the red flash lamp to flash, the buzzer starts, the display control module feeds back the information to the terminal system, the staff promptly shuts down the equipment of the sample oil to be tested, then starts the oil filtering unit to filter the sample oil, the filtered sample oil is stored in the storage unit, and after complete filtering, it is discharged into the sample oil equipment; S6. When it is detected that the electrode solution fails, the display control module controls the waste liquid unit to discharge the waste liquid in the titration cell, and then the display control module controls the liquid replenishing unit to replenish the liquid.

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