An integrated device for oil filling, degassing, storage of cans and oil filling of sensors and an oil filling method

Abstract

The present invention discloses a device and an oil filling method for integrated tank oil filling degassing storage and sensor oil filling. The vacuum generation subsystem, the filling liquid pretreatment subsystem, the oil storage subsystem, the oil filling subsystem and the pressurization subsystem of the device are interconnected; the pressurization subsystem is connected to the external atmosphere; the sensor to be oil-filled is placed in the oil filling subsystem. The method includes: sealing and placing the sensor to be oil-filled in the oil filling container, the filling liquid flows from the oil storage tank into the oil filling container, the sensor to be oil-filled is filled with oil, repeating a pressurization process for stepwise pressurization, and continuing to repeat the above-mentioned pressurization process once until the sensor to be oil-filled is completely filled with oil, opening the oil filling container to take out the sensor with oil filling completed, and completing the oil filling process. The device of the present invention has a simple and compact structure, a high degree of integration, and strong expandability; the oil filling method adopts vacuum oil filling and stepwise pressurization to improve the oil filling quality, simplifies the production process, and improves the production efficiency.

Description

Technical Field

[0001] The invention relates to an integrated oil filling device, in particular to an integrated tank oil filling, degassing, storage and sensor oil filling device and an oil filling method. Background Art

[0002] Pressure sensors are one of the most commonly used sensors in industrial practice and are widely used in industrial production, medical equipment, military industry, and other industrial automatic control environments. With the increasing requirements for measurement accuracy and reliability, the demand for piezoresistive oil-filled pressure sensors is gradually increasing. However, this type of sensor contains sensitive components and cannot be in direct contact with the object being measured. It needs to be encapsulated and protected. Therefore, a liquid medium is used to transmit the pressure signal, and a flexible material membrane is used to encapsulate the liquid medium and the sensor element. However, the liquid medium can also cause negative effects such as pressure distortion, nonlinearity, temperature drift, and static pressure drift, especially when there is a lot of dissolved gas in the liquid medium and the filling is insufficient. The traditional gravity filling method is not only difficult to fill completely, but also contains a lot of gas dissolved in the filling liquid, which affects the performance of the sensor. The existing filling system has a complex structure and low device utilization efficiency. Summary of the invention

[0003] In order to solve the problems existing in the background technology, the present invention provides a tank oil filling, degassing storage and sensor oil filling integrated device and oil filling method, which overcomes the problem that sensor filling cannot have both high efficiency and high quality and stability of finished products.

[0004] The technical solution adopted by the present invention is:

[0005] 1. A tank oil filling, degassing, storage and sensor oil filling integrated device:

[0006] The integrated device includes a vacuum generating subsystem, a filling liquid pretreatment subsystem, an oil storage subsystem, an oil filling subsystem and a pressurizing subsystem. The vacuum generating subsystem, the filling liquid pretreatment subsystem, the oil storage subsystem, the oil filling subsystem and the pressurizing subsystem are interconnected; the pressurizing subsystem is connected to the external atmosphere, and the sensor to be filled with oil is placed in the oil filling subsystem during oil filling. The filling liquid is specifically silicone oil, etc., and the filling liquid of different sensors may be different.

[0007] The vacuum generating subsystem includes a vacuum pump and a one-way four-way valve, the pump port of the vacuum pump is connected to the air outlet of the one-way four-way valve, the first air inlet, the second air inlet and the third air inlet of the one-way four-way valve are respectively connected to the filling liquid pretreatment subsystem, the oil storage subsystem and the oil filling subsystem, and the second air inlet of the one-way four-way valve is connected to the pressurizing subsystem through the oil storage subsystem. The vacuum generating subsystem provides vacuuming conditions for the filling liquid pretreatment subsystem, the oil storage subsystem and the oil filling subsystem.

[0008] The described oil storage subsystem includes a first three-way interface, a third manual shut-off valve, a second three-way interface, a first glass vacuum valve, a second glass vacuum valve, an oil storage tank, a fourth manual shut-off valve, and a sixth glass vacuum valve. The air outlet of the first three-way interface is connected to the second air inlet of the one-way four-way valve of the vacuum generation subsystem. The air inlet of the first three-way interface is connected to the air outlet of the second three-way interface through the third manual shut-off valve. The two-way flow port of the first three-way interface is connected to the oil filling subsystem. The first air inlet of the second three-way interface is connected to the air outlet of the oil storage tank through the first glass vacuum valve. The second air inlet of the second three-way interface is connected to the pressurization subsystem through the fourth manual shut-off valve. The oil inlet of the oil storage tank is connected to the liquid filling pretreatment subsystem through the second glass vacuum valve. The oil outlet of the oil storage tank is connected to the oil filling subsystem through the sixth glass vacuum valve. The oil storage tank and the glass vacuum valve are integrally formed to ensure good airtightness after closing the three glass vacuum valves when the vacuum pump is not working, thereby extending the storage time of the liquid filling. The liquid filling pretreatment subsystem and the oil filling subsystem are separated by the oil storage tank, enabling them to operate independently.

[0009] When there is no inflow or outflow of the liquid filling in the oil storage tank of the described oil storage subsystem, it is always connected to the external vacuum generator to maintain vacuum.

[0010] The described liquid filling pretreatment subsystem includes a first manual shut-off valve, a heating dish, a second manual shut-off valve, and a heater. The heating dish is placed on the heater, and the oil liquid is vacuum-sealed in the heating dish. The air outlet of the heating dish is connected to the first air inlet of the one-way four-way valve of the vacuum generation subsystem through the first manual shut-off valve. The oil outlet interface of the heating dish is connected to the oil inlet of the oil storage tank through the second glass vacuum valve of the oil storage subsystem. The air inlet of the heating dish is connected to the pressurization subsystem through the second manual shut-off valve. The heating dish structure consists of a dish body and a dish cover, which are hermetically connected to form a vacuum environment. There are three interfaces on the dish cover, and the air inlet and air outlet are respectively connected to the inlet pipe and outlet pipe. The oil outlet interface can be connected to pipes on both sides. One end outside is connected to the oil delivery pipe, and the inner end of the pipe extends to the bottom of the dish body to facilitate the complete discharge of the oil liquid when draining. Manual shut-off valves can be connected to both ends of the interface of the canned liquid pretreatment subsystem. When the connected manual shut-off valve is opened and the manual shut-off valve of the pressurization subsystem is also opened, gas enters the heating dish, and the oil liquid will flow into the oil storage subsystem from the oil outlet. Adjusting the opening of the manual adjustable throttle valve can regulate the oil liquid flow rate.

[0011] The described oil filling subsystem includes a third glass vacuum valve, a fifth glass vacuum valve, a third three-way interface, a fourth glass vacuum valve, and an oil filling container. The air outlet of the third three-way interface is connected to the third air inlet of the one-way four-way valve of the vacuum generating subsystem. The two-way flow port of the third three-way interface is connected to the two-way flow port of the first three-way interface of the oil storage subsystem. The air inlet of the third three-way interface is connected to the air outlet of the oil filling container through the fourth glass vacuum valve. The air inlet of the oil filling container is connected to the pressurizing subsystem through the third glass vacuum valve. The oil inlet of the oil filling container is connected to the oil outlet of the oil storage tank of the oil storage subsystem through the sixth glass vacuum valve of the oil storage subsystem via the fifth glass vacuum valve. When filling oil, the sensor to be filled with oil is placed in the oil filling container of the oil filling subsystem. The oil filling container is a flat-bottomed oil filling container made of quartz, which consists of a container body and a container cover, and the two are sealed and connected. The container body and the container cover of the oil filling container are integrally formed with the glass vacuum valve to ensure the airtightness of the oil filling container when all valves are closed. Multiple oil filling subsystems can be connected in parallel in the oil filling integrated device to simultaneously or separately complete the oil filling of sensors with different requirements. The connection method between each oil filling subsystem and other subsystems is the same, and each oil filling subsystem operates independently without waiting for each other.

[0012] The oil storage subsystem and the oil filling subsystem are connected through the remote three-way interface of the oil storage subsystem and the three-way interface of the oil filling subsystem. When the corresponding manual shut-off valve and the glass vacuum valve are opened, the oil storage tank and the oil filling container are connected and the air pressures are equal. Since the oil storage subsystem is higher than the oil filling subsystem, when the viscosity of the filling liquid is not high, it can flow down by gravity. When the viscosity of the filling liquid is very high and it cannot flow down, the manual shut-off valve connecting to the vacuum generating subsystem can be temporarily closed, and the manual shut-off valve connecting to the pressurizing subsystem can be opened to temporarily increase the pressure of the oil storage tank to allow the filling liquid to flow into the oil filling subsystem.

[0013] The position of the oil storage tank of the described oil storage subsystem is higher than the position of the oil filling container of the oil filling subsystem. When the oil storage tank and the oil filling container are connected and the air pressures are the same, the filling liquid inside the oil storage tank itself flows from the oil storage tank into the oil filling container by its own gravity.

[0014] The described pressurizing subsystem includes a four-way interface, a manually adjustable throttle valve, a constant volume container, and a fifth manual shut-off valve. The first air outlet of the four-way interface is connected to the second air inlet of the second three-way interface through the fourth manual shut-off valve of the oil storage subsystem. The second air outlet of the four-way interface is connected to the air inlet of the oil filling container through the third glass vacuum valve of the oil filling subsystem. The third air outlet of the four-way interface is connected to the air inlet of the heating dish through the second manual shut-off valve of the filling liquid pretreatment subsystem. The air inlet of the four-way interface is connected to the air outlet of the constant volume container through the manually adjustable throttle valve. The air inlet of the constant volume container is connected to the external atmosphere through the fifth manual shut-off valve. The pressurizing subsystem is reused with the vacuum generating subsystem. The pressurizing subsystem can not only help the oil filling subsystem to pressurize and fill oil, but also help the oil storage subsystem to transfer oil.

[0015] II. Degassing storage and oil filling method for the integrated device of tank oil filling degassing and sensor oil filling:

[0016] The degassing storage and oil filling method for the integrated device includes a filling liquid pretreatment process, a filling liquid storage process, and a sensor oil filling process, and the one-way four-way valve is always open; during the filling liquid pretreatment process, the opening and closing state of the glass vacuum valve does not affect the filling liquid pretreatment process; close the first manual stop valve, the second manual stop valve, the second glass vacuum valve, the third glass vacuum valve, the sixth glass vacuum valve, the fourth manual stop valve, and the fifth manual stop valve, open the third manual stop valve, add the filling liquid to be processed into the heating dish of the filling liquid pretreatment subsystem and vacuum seal it, turn on the vacuum pump and the heater, then open the first manual stop valve, according to the filling liquid pretreatment requirements, when the heater heats at a preset temperature for a preset time, turn off the heater, cool the filling liquid in the heating dish to room temperature, close the first manual stop valve, open the second manual stop valve, the second glass vacuum valve, and the fifth manual stop valve, and the filling liquid flows from the heating dish into the storage tank. At this time, adjust the manual adjustable throttle valve to the first preset opening to adjust the transfer speed of the filling liquid from the heating dish to the storage tank. When the transfer of the filling liquid from the heating dish to the storage tank is completed, close the second manual stop valve, the second glass vacuum valve, and the fifth manual stop valve to complete the filling liquid pretreatment process.

[0017] When there is no need to transfer the filling liquid and during the filling liquid storage process, the opening and closing states of the manual stop valve and the glass vacuum valve have no influence on the filling liquid storage process; close the second glass vacuum valve, the fourth manual stop valve, and the sixth glass vacuum valve, open the third manual stop valve and the first glass vacuum valve, turn on the vacuum pump to extract the air in the heating dish, the storage tank, and the oil filling container to a vacuum state, that is, store the filling liquid in a vacuum state.

[0018] During the process of filling the sensor with oil, the opening and closing state of the first manual shut-off valve has no impact on the oil filling process of the sensor; close the second manual shut-off valve, the third manual shut-off valve, the first glass vacuum valve, the second glass vacuum valve, the third glass vacuum valve, the fifth glass vacuum valve, the fourth glass vacuum valve, the fourth manual shut-off valve, the sixth glass vacuum valve and the fifth manual shut-off valve. Place the sensor to be filled with oil in the oil filling container in a sealed manner. Open the third manual shut-off valve, the first glass vacuum valve and the fourth glass vacuum valve. Start the vacuum pump. After stabilization, open the fifth glass vacuum valve and the sixth glass vacuum valve. The filling liquid slowly flows into the oil filling container from the storage tank by gravity. If a filling liquid with a relatively high viscosity is used and the filling liquid cannot slowly flow into the oil filling container from the storage tank by gravity, then open the fifth manual shut-off valve to make the constant volume container communicate with the external atmosphere and be filled with gas. Then close the third manual shut-off valve and the fifth manual shut-off valve. Open the fourth manual shut-off valve to pressurize the storage tank. Adjust the manually adjustable throttle valve to the second preset opening degree to adjust the transfer speed of the filling liquid from the heating dish to the storage tank and the pressurization speed of the storage tank. After the transfer of the filling liquid is completed, close the fourth manual shut-off valve. Open the third manual shut-off valve. The filling liquid flows from the storage tank into the oil filling container. When the filling liquid in the oil filling container reaches the preset height, close the fifth glass vacuum valve and the sixth glass vacuum valve. The sensor to be filled with oil in the oil filling container is automatically filled with oil. Close the third glass vacuum valve and the fourth glass vacuum valve. Then perform a pressurization process. Open the fifth manual shut-off valve to make the oil filling container filled with gas. Then close the fifth manual shut-off valve. Open the third glass vacuum valve to pressurize the oil filling container. Adjust the manually adjustable throttle valve to the third preset opening degree to prevent over-pressurization. Complete one pressurization process. Then repeat the pressurization process once for stepwise pressurization so that the pressure in the oil filling container reaches the preset pressure. After pressurization is completed, close the third glass vacuum valve. Open the fourth glass vacuum valve to extract the air in the oil filling container to form a vacuum state in the oil filling container. Then continue to repeat the above-mentioned pressurization process once until the sensor to be filled with oil is completely filled with oil. Finally, open the third glass vacuum valve and the fifth manual shut-off valve. Then open the oil filling container to take out the sensor that has been filled with oil, and complete the oil filling process.

[0019] The sensor to be filled with oil is specifically a silicon-based pressure sensor, etc.

[0020] When the constant volume container is connected to the oil filling container with a certain volume, the atmosphere and the oil filling container can be cyclically connected to pressurize the oil filling container in steps of 20, and the approximate air pressure can be obtained through simple calculation. Without using electrical components such as sensors, manual simple control of the air pressure is realized. The pressurization subsystem and the vacuum generation subsystem can also perform cyclic vacuum and pressurization on the oil filling container. The oil filling container can be evacuated first by the vacuum generation subsystem, then pressurized by the pressurization subsystem, and then evacuated by the vacuum generation subsystem again. This cycle ensures high-quality oil filling of the sensor.

[0021] The beneficial effects of the present invention are as follows:

[0022] 1. The structure is simple. For the electrical components except the necessary vacuum pump and heating furnace, grading voltage regulation can be carried out without sensors.

[0023] 2. The structure is compact, and both the vacuum pump and the pressurization subsystem are reused during the preparation process.

[0024] 3. High efficiency. The canned liquid pretreatment subsystem and the oil filling subsystem are independent, so that the canned liquid pretreatment can be carried out while filling oil into the sensor.

[0025] 4. High degree of integration. The device includes the pretreatment of oil fluid, the storage of oil fluid and the oil filling of sensors, which simplifies the production process and improves the production efficiency.

[0026] 5. Good oil filling effect. Vacuum oil filling is adopted instead of gravity filling. To ensure good oil filling effect, after vacuum oil filling, the oil filling subsystem can be graded and pressurized according to requirements, and simple manual control can be realized. In addition, the oil filling container can be repeatedly evacuated and pressurized to further fill the filling liquid into the sensor and improve the oil filling quality.

[0027] 6. Strong expandability. Several oil filling subsystems of different specifications can be connected in parallel to complete the oil filling of sensors with different specifications and requirements, which can be carried out independently or simultaneously. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a schematic diagram of the overall structure of the device of the present invention;

[0029] Figure 2 is a schematic diagram of the vacuum generation subsystem of the present invention;

[0030] Figure 3 is a schematic diagram of the canned liquid pretreatment subsystem of the present invention;

[0031] Figure 4 is a schematic diagram of the oil storage subsystem of the present invention;

[0032] Figure 5 is a schematic diagram of the oil filling subsystem of the present invention;

[0033] Figure 6 is a schematic diagram of the pressurization subsystem of the present invention;

[0034] In the figure: 1. Vacuum pump, 2. One-way four-way valve, 3. First manual stop valve, 4. Heating dish, 5. Oil outlet interface, 6. Second manual stop valve, 7. Heater, 8. First three-way interface, 9. Third manual stop valve, 10. Second three-way interface, 11. First glass vacuum valve, 12. Second glass vacuum valve, 13. Oil storage tank, 14. Third glass vacuum valve, 15. Fifth glass vacuum valve, 16. Third three-way interface, 17. Fourth glass vacuum valve, 18. Fourth manual stop valve, 19. Sixth glass vacuum valve, 20. Oil filling container, 21. Four-way interface, 22. Manually adjustable throttle valve, 23. Constant volume container, 24. Fifth manual stop valve. Detailed implementation mode

[0035] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0036] As Figure 1 shown, the integrated device of the present invention includes a vacuum generation subsystem, a filling liquid pretreatment subsystem, an oil storage subsystem, an oil filling subsystem and a pressurization subsystem, and the vacuum generation subsystem, the filling liquid pretreatment subsystem, the oil storage subsystem, the oil filling subsystem and the pressurization subsystem are interconnected; the pressurization subsystem is connected to the external atmosphere, and the sensor to be filled with oil is placed in the oil filling subsystem during oil filling. The filling liquid is specifically silicone oil, etc., and the filling liquids for different sensors may be different.

[0037] As Figure 2 shown, the vacuum generation subsystem includes a vacuum pump 1 and a one-way four-way valve 2. The pump port of the vacuum pump 1 is connected to the air outlet of the one-way four-way valve 2. The first air inlet, the second air inlet and the third air inlet of the one-way four-way valve 2 are respectively connected to the filling liquid pretreatment subsystem, the oil storage subsystem and the oil filling subsystem, and the second air inlet of the one-way four-way valve 2 is connected to the pressurization subsystem through the oil storage subsystem. The vacuum generation subsystem provides the condition of vacuum pumping for the filling liquid pretreatment subsystem, the oil storage subsystem and the oil filling subsystem.

[0038] As Figure 4As shown in the figure, the oil storage subsystem includes a first three-way interface 8, a third manual shut-off valve 9, a second three-way interface 10, a first glass vacuum valve 11, a second glass vacuum valve 12, an oil storage tank 13, a fourth manual shut-off valve 18, and a sixth glass vacuum valve 19. The air outlet of the first three-way interface 8 is connected to the second air inlet of the one-way four-way valve 2 of the vacuum generation subsystem. The air inlet of the first three-way interface 8 is connected to the air outlet of the second three-way interface 10 through the third manual shut-off valve 9, and the two-way flow port of the first three-way interface 8 is connected to the oil filling subsystem. The first air inlet of the second three-way interface 10 is connected to the air outlet of the oil storage tank 13 through the first glass vacuum valve 11, and the second air inlet of the second three-way interface 10 is connected to the pressurization subsystem through the fourth manual shut-off valve 18. The oil inlet of the oil storage tank 13 is connected to the pre-treatment subsystem of the filling liquid through the second glass vacuum valve 12, and the oil outlet of the oil storage tank 13 is connected to the oil filling subsystem through the sixth glass vacuum valve 19. The oil storage tank 13 is integrally formed with the glass vacuum valves 11, 12, and 19, ensuring good airtightness after closing the three glass vacuum valves when the vacuum pump 1 is not working, and prolonging the storage time of the filling liquid. The pre-treatment subsystem of the filling liquid and the oil filling subsystem are separated by the oil storage tank 13, enabling them to operate independently.

[0039] When there is no inflow or outflow of the filling liquid, the oil storage tank 13 of the oil storage subsystem is always connected to the external vacuum generator to maintain vacuum.

[0040] As Figure 3 shown in the figure, the pre-treatment subsystem of the filling liquid includes a first manual shut-off valve 3, a heating dish 4, a second manual shut-off valve 6, and a heater 7. The heating dish 4 is placed on the heater 7, and the oil liquid is vacuum-sealed in the heating dish 4. The air outlet of the heating dish 4 is connected to the first air inlet of the one-way four-way valve 2 of the vacuum generation subsystem through the first manual shut-off valve 3. The oil outlet interface 5 of the heating dish 4 is connected to the oil inlet of the oil storage tank 13 through the second glass vacuum valve 12 of the oil storage subsystem, and the air inlet of the heating dish 4 is connected to the pressurization subsystem through the second manual shut-off valve 6. The heating dish 4 is structured into a dish body and a dish cover, which are hermetically connected to form a vacuum environment. There are three interfaces on the dish cover, and the air inlet and air outlet are respectively connected to the inlet pipe and the outlet pipe. The oil outlet interface 5 can be connected to pipes on both sides. One end outside is connected to the oil delivery pipe, and the inner end of the pipe extends to the bottom of the dish body to facilitate the complete discharge of the oil liquid when draining. Both ends of the interface of the pre-treatment subsystem of the canned liquid can be connected to manual shut-off valves. When the connected manual shut-off valve is opened and the manual shut-off valve of the pressurization subsystem is also opened, gas enters the heating dish 4, and the oil liquid will flow into the oil storage subsystem from the oil outlet. Adjusting the opening degree of the manually adjustable throttle valve 22 can regulate the oil liquid flow rate.

[0041] As Figure 5As shown in the figure, the oil filling subsystem includes a third glass vacuum valve 14, a fifth glass vacuum valve 15, a third three-way interface 16, a fourth glass vacuum valve 17, and an oil filling container 20. The air outlet of the third three-way interface 16 is connected to the third air inlet of the one-way four-way valve 2 of the vacuum generating subsystem. The two-way flow port of the third three-way interface 16 is connected to the two-way flow port of the first three-way interface 8 of the oil storage subsystem. The air inlet of the third three-way interface 16 is connected to the air outlet of the oil filling container 20 through the fourth glass vacuum valve 17. The air inlet of the oil filling container 20 is connected to the pressurization subsystem through the third glass vacuum valve 14. The oil inlet of the oil filling container 20 is connected to the sixth glass vacuum valve 19 of the oil storage subsystem through the fifth glass vacuum valve 15 and then connected to the oil outlet of the oil storage tank 13 of the oil storage subsystem. When filling oil, the sensor to be filled with oil is placed in the oil filling container 20 of the oil filling subsystem. The oil filling container 20 is a flat-bottomed oil filling container made of quartz. The oil filling container 20 is composed of a container body and a container cover, which are sealed and connected. The container body and the container cover of the oil filling container 20 are integrally formed with the glass vacuum valves 14, 15, and 17 to ensure the airtightness of the oil filling container 20 when all valves are closed. Multiple oil filling subsystems can be connected in parallel in the oil filling integrated device to simultaneously or separately complete the oil filling of sensors with different requirements. The connection methods between each oil filling subsystem and other subsystems are the same, and each oil filling subsystem operates independently without waiting for each other.

[0042] The oil storage subsystem and the oil filling subsystem are connected through the remote three-way interface of the oil storage subsystem and the three-way interface of the oil filling subsystem. When the corresponding manual shut-off valve and the glass vacuum valve are opened, the oil storage tank 13 is connected to the oil filling container 20, and the air pressures are equal. Since the oil storage subsystem is higher than the oil filling subsystem, when the viscosity of the filling liquid is not high, it can flow down by gravity. When the viscosity of the filling liquid is very high and it cannot flow down, the manual shut-off valve connecting to the vacuum generating subsystem can be temporarily closed, and the manual shut-off valve connecting to the pressurization subsystem can be opened to temporarily increase the pressure of the oil storage tank 13 to allow the filling liquid to flow into the oil filling subsystem.

[0043] The position of the oil storage tank 13 of the oil storage subsystem is higher than the position of the oil filling container 20 of the oil filling subsystem. When the oil storage tank 13 and the oil filling container 20 are connected and the air pressures are the same, the filling liquid inside the oil storage tank 13 itself flows from the oil storage tank 13 into the oil filling container 20 by its own gravity.

[0044] Such as Figure 6As shown in the figure, the pressurization subsystem includes a four-way interface 21, a manually adjustable flow valve 22, a constant-volume container 23, and a fifth manual shut-off valve 24. The first air outlet of the four-way interface 21 is connected to the second air inlet of the second three-way interface 10 through the fourth manual shut-off valve 18 of the oil storage subsystem. The second air outlet of the four-way interface 21 is connected to the air inlet of the oil filling container 20 through the third glass vacuum valve 14 of the oil filling subsystem. The third air outlet of the four-way interface 21 is connected to the air inlet of the heating dish 4 through the second manual shut-off valve 6 of the filling liquid pretreatment subsystem. The air inlet of the four-way interface 21 is connected to the air outlet of the constant-volume container 23 through the manually adjustable flow valve 22. The air inlet of the constant-volume container 23 is connected to the external atmosphere through the fifth manual shut-off valve 24. The pressurization subsystem is reused with the vacuum generation subsystem. The pressurization subsystem can not only help the oil filling subsystem to pressurize and fill oil, but also help the oil storage subsystem to transfer oil.

[0045] The degassing, storage, and oil filling method of the integrated device of the present invention includes a filling liquid pretreatment process, a filling liquid storage process, and a sensor oil filling process. The one-way four-way valve 2 is always open; during the filling liquid pretreatment process, the opening and closing states of the glass vacuum valves 11, 15, and 17 do not affect the filling liquid pretreatment process; close the first manual shut-off valve 3, the second manual shut-off valve 6, the second glass vacuum valve 12, the third glass vacuum valve 14, the sixth glass vacuum valve 19, the fourth manual shut-off valve 18, and the fifth manual shut-off valve 24, open the third manual shut-off valve 9, add the filling liquid to be processed into the heating dish 4 of the filling liquid pretreatment subsystem and vacuum seal it, turn on the vacuum pump 1 and the heater 7, then open the first manual shut-off valve 3, according to the filling liquid pretreatment requirements, when the heater 7 heats at a preset temperature for a preset time, turn off the heater 7, cool the filling liquid in the heating dish 4 to room temperature, close the first manual shut-off valve 3, open the second manual shut-off valve 6, the second glass vacuum valve 12, and the fifth manual shut-off valve 24, the filling liquid flows from the heating dish 4 into the oil storage tank 13, at this time, adjust the manually adjustable flow valve 22 to the first preset opening degree, so as to adjust the transfer speed of the filling liquid from the heating dish 4 to the oil storage tank 13, when the transfer of the filling liquid from the heating dish 4 to the oil storage tank 13 is completed, close the second manual shut-off valve 6, the second glass vacuum valve 12, and the fifth manual shut-off valve 24, and complete the filling liquid pretreatment process.

[0046] When there is no need to transfer the filling liquid and perform the filling liquid storage process, the opening and closing states of the manual shut-off valves 3, 6, 24 and the glass vacuum valves 14, 15, 17 have no influence on the filling liquid storage process; close the second glass vacuum valve 12, the fourth manual shut-off valve 18, and the sixth glass vacuum valve 19, open the third manual shut-off valve 9 and the first glass vacuum valve 11, turn on the vacuum pump 1 to extract the air in the heating dish 4, the oil storage tank 13, and the oil filling container 20 to a vacuum state, that is, store the filling liquid in a vacuum state.

[0047] During the process of filling the sensor with oil, the opening and closing state of the first manual shut-off valve 3 has no impact on the oil filling process of the sensor; close the second manual shut-off valve 6, the third manual shut-off valve 9, the first glass vacuum valve 11, the second glass vacuum valve 12, the third glass vacuum valve 14, the fifth glass vacuum valve 15, the fourth glass vacuum valve 17, the fourth manual shut-off valve 18, the sixth glass vacuum valve 19, and the fifth manual shut-off valve 24. Place the sensor to be filled with oil in the oil filling container 20 in a sealed manner. Open the third manual shut-off valve 9, the first glass vacuum valve 11, and the fourth glass vacuum valve 17. Turn on the vacuum pump 1. After stabilization, open the fifth glass vacuum valve 15 and the sixth glass vacuum valve 19. The filling liquid slowly flows into the oil filling container 20 from the oil storage tank 13 by gravity. If a filling liquid with a relatively high viscosity is used and the filling liquid cannot slowly flow into the oil filling container 20 from the oil storage tank 13 by gravity, then open the fifth manual shut-off valve 24 to make the constant volume container 23 communicate with the external atmosphere and be filled with gas. Then close the third manual shut-off valve 9 and the fifth manual shut-off valve 24. Open the fourth manual shut-off valve 18 to pressurize the oil storage tank 13. Adjust the manual adjustable throttle valve 22 to the second preset opening degree to adjust the transfer speed of the filling liquid from the heating dish 4 to the oil storage tank 13 and the pressurization speed of the oil storage tank 13. After the transfer of the filling liquid is completed, close the fourth manual shut-off valve 18. Open the third manual shut-off valve 9. The filling liquid flows from the oil storage tank 13 into the oil filling container 20. When the filling liquid in the oil filling container 20 reaches the preset height, close the fifth glass vacuum valve 15 and the sixth glass vacuum valve 19. The sensor to be filled with oil in the oil filling container 20 is automatically filled with oil. Close the third glass vacuum valve 14 and the fourth glass vacuum valve 17. Then perform a pressurization process. Open the fifth manual shut-off valve 24 to make the oil filling container 20 filled with gas. Then close the fifth manual shut-off valve 24. Open the third glass vacuum valve 14 to pressurize the oil filling container 20. Adjust the manual adjustable throttle valve 22 to the third preset opening degree to prevent over-pressurization. Complete one pressurization process. Then repeat the pressurization process once for stepwise pressurization until the pressure in the oil filling container 20 reaches the preset pressure. After the pressurization is completed, close the third glass vacuum valve 14. Open the fourth glass vacuum valve 17 to extract the air in the oil filling container 20 to create a vacuum state in the oil filling container 20. Then continue to repeat the above-mentioned pressurization process once until the sensor to be filled with oil is completely filled with oil. Finally, open the third glass vacuum valve 14 and the fifth manual shut-off valve 24. Then open the oil filling container 20 to take out the sensor that has been filled with oil, completing the oil filling process. The sensor to be filled with oil is specifically a silicon-based pressure sensor, etc.

[0048] The fixed volume of the pressurization subsystem and the corresponding pipeline volume are known, and the volume of the oil filling subsystem and the corresponding pipeline volume are known. The latter is approximately n times that of the former. After evacuation, the air pressure in the oil filling subsystem is m times that of the atmospheric pressure. The pressurization subsystem can be used to pressurize the oil filling subsystem in stages. The specific operation is as follows: close the glass vacuum valve connecting the pressurization subsystem to the oil filling subsystem and the oil storage subsystem, open the manual stop valve connected to the atmosphere to balance the internal and external air pressures, then close the manual stop valve connected to the atmosphere, and open the manual stop glass vacuum valve connected to the oil filling subsystem, so that the pressure in the oil filling subsystem is approximately atmospheric pressures, approximately Repeat this process x times, then the pressure in the oil filling subsystem is approximately atmospheric pressures, approximately

[0049] When the constant-volume container 23 is connected to the oil filling container 20 with a certain volume, the oil filling container 20 can be pressurized in stages by circulating and connecting to the atmosphere, and the approximate air pressure can be obtained through simple calculation. Without using electrical components such as sensors, manual simple control of the air pressure is realized. The pressurization subsystem and the vacuum generation subsystem can also perform cyclic vacuuming and pressurization on the oil filling container. The oil filling container can be evacuated first by the vacuum generation subsystem, then pressurized by the pressurization subsystem, and then evacuated by the vacuum generation subsystem again. This cycle ensures high-quality oil filling for the sensor.

[0050] Except for the necessary vacuum pump and heating furnace, the device of the present invention can perform tank oil filling pretreatment, filling liquid storage, and sensor oil filling without any electrical components. Moreover, the filling liquid pretreatment process, filling liquid storage, and oil filling process can be carried out independently and separately, with strong expandability. In this oil filling method, the oil filling subsystem can also be pressurized in stages, and cyclic pumping and pressurization are carried out to ensure the oil filling quality. Aiming at the problems of cumbersome process, complex system, poor effect, and long time consumption in tank oil filling degassing storage and sensor oil filling, the present system is simple and compact, and provides a compact, reliable, efficient, and effective device and method for tank oil filling pretreatment, storage, and sensor oil filling.

[0051] Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features. 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. An integrated device for tank oil filling, degassing, storage and sensor oil filling, characterized in that: It includes a vacuum generating subsystem, a filling liquid pretreatment subsystem, an oil storage subsystem, an oil filling subsystem, and a pressurizing subsystem. The vacuum generating subsystem, the filling liquid pretreatment subsystem, the oil storage subsystem, the oil filling subsystem, and the pressurizing subsystem are interconnected; the pressurizing subsystem is connected to the external atmosphere, and the sensor to be oil-filled is placed in the oil filling subsystem; The vacuum generating subsystem includes a vacuum pump (1) and a one-way four-way valve (2). The pump port of the vacuum pump (1) is connected to the air outlet of the one-way four-way valve (2). The first air inlet, the second air inlet, and the third air inlet of the one-way four-way valve (2) are respectively connected to the filling liquid pretreatment subsystem, the oil storage subsystem, and the oil filling subsystem. The second air inlet of the one-way four-way valve (2) is connected to the pressurizing subsystem through the oil storage subsystem; The oil storage subsystem includes a first three-way interface (8), a third manual stop valve (9), a second three-way interface (10), a first glass vacuum valve (11), a second glass vacuum valve (12), an oil storage tank (13), a fourth manual stop valve (18), and a sixth glass vacuum valve (19). The air outlet of the first three-way interface (8) is connected to the second air inlet of the one-way four-way valve (2) of the vacuum generating subsystem. The air inlet of the first three-way interface (8) is connected to the air outlet of the second three-way interface (10) through the third manual stop valve (9). The two-way flow port of the first three-way interface (8) is connected to the oil filling subsystem; the first air inlet of the second three-way interface (10) is connected to the air outlet of the oil storage tank (13) through the first glass vacuum valve (11). The second air inlet of the second three-way interface (10) is connected to the pressurizing subsystem through the fourth manual stop valve (18); the oil inlet of the oil storage tank (13) is connected to the filling liquid pretreatment subsystem through the second glass vacuum valve (12). The oil outlet of the oil storage tank (13) is connected to the oil filling subsystem through the sixth glass vacuum valve (19); The filling liquid pretreatment subsystem includes a first manual stop valve (3), a heating dish (4), a second manual stop valve (6), and a heater (7). The heating dish (4) is placed on the heater (7). The heating dish (4) is vacuum-sealed with oil liquid. The air outlet of the heating dish (4) is connected to the first air inlet of the one-way four-way valve (2) of the vacuum generating subsystem through the first manual stop valve (3). The oil outlet interface (5) of the heating dish (4) is connected to the oil inlet of the oil storage tank (13) through the second glass vacuum valve (12) of the oil storage subsystem. The air inlet of the heating dish (4) is connected to the pressurizing subsystem through the second manual stop valve (6).

2. The integrated device for tank oil filling, degassing, storage and sensor oil filling according to claim 1, characterized in that: When there is no inflow or outflow of the filling liquid, the oil storage tank (13) of the oil storage subsystem is always connected to the external vacuum generator to maintain vacuum.

3. An integrated device for tank oil filling, degassing storage and sensor oil filling according to claim 1, characterized in that: The described oil filling subsystem includes a third glass vacuum valve (14), a fifth glass vacuum valve (15), a third three-way interface (16), a fourth glass vacuum valve (17), and an oil filling container (20). The air outlet of the third three-way interface (16) is connected to the third air inlet of the one-way four-way valve (2) of the vacuum generating subsystem. The two-way flow port of the third three-way interface (16) is connected to the two-way flow port of the first three-way interface (8) of the oil storage subsystem. The air inlet of the third three-way interface (16) is connected to the air outlet of the oil filling container (20) through the fourth glass vacuum valve (17). The air inlet of the oil filling container (20) is connected to the pressurization subsystem through the third glass vacuum valve (14). The oil inlet of the oil filling container (20) is connected to the oil outlet of the oil storage tank (13) of the oil storage subsystem through the fifth glass vacuum valve (15) and then through the sixth glass vacuum valve (19) of the oil storage subsystem; The oil filling sensor to be filled is placed in the oil filling container (20) of the oil filling subsystem.

4. The integrated device for tank oil filling, degassing, storage and sensor oil filling according to claim 3, characterized in that: The position of the oil storage tank (13) of the described oil storage subsystem is higher than the position of the oil filling container (20) of the oil filling subsystem. When the oil storage tank (13) and the oil filling container (20) are connected and the air pressures are the same, the filling liquid inside the oil storage tank (13) itself flows from the oil storage tank (13) into the oil filling container (20) by its own gravity.

5. The integrated device for tank oil filling, degassing, storage and sensor oil filling according to claim 3, characterized in that: The described pressurization subsystem includes a four-way interface (21), a manually adjustable throttle valve (22), a constant volume container (23), and a fifth manual shut-off valve (24). The first air outlet of the four-way interface (21) is connected to the second air inlet of the second three-way interface (10) through the fourth manual shut-off valve (18) of the oil storage subsystem. The second air outlet of the four-way interface (21) is connected to the air inlet of the oil filling container (20) through the third glass vacuum valve (14) of the oil filling subsystem. The third air outlet of the four-way interface (21) is connected to the air inlet of the heating dish (4) through the second manual shut-off valve (6) of the filling liquid pretreatment subsystem. The air inlet of the four-way interface (21) is connected to the air outlet of the constant volume container (23) through the manually adjustable throttle valve (22). The air inlet of the constant volume container (23) is connected to the external atmosphere through the fifth manual shut-off valve (24).

6. The degassing, storage and oil filling method of the integrated device according to any one of claims 1-5, characterized in that: The degassing storage and oil filling method of the integrated device described above includes a filling liquid pretreatment process, a filling liquid storage process, and a sensor oil filling process, and the one-way four-way valve (2) is always open; during the filling liquid pretreatment process, the first manual shut-off valve (3), the second manual shut-off valve (6), the second glass vacuum valve (12), the third glass vacuum valve (14), the sixth glass vacuum valve (19), the fourth manual shut-off valve (18), and the fifth manual shut-off valve (24) are closed, the third manual shut-off valve (9) is opened, the filling liquid to be processed is added to the heating dish (4) of the filling liquid pretreatment subsystem and vacuum sealed, the vacuum pump (1) and the heater (7) are turned on, and then the first manual shut-off valve (3) is opened. When the heater (7) heats at a preset temperature for a preset time, the heater (7) is turned off, the filling liquid in the heating dish (4) is cooled to room temperature, the first manual shut-off valve (3) is closed, the second manual shut-off valve (6), the second glass vacuum valve (12), and the fifth manual shut-off valve (24) are opened, and the filling liquid flows from the heating dish (4) into the storage oil tank (13). At this time, the manual adjustable throttle valve (22) is adjusted to the first preset opening degree, so as to adjust the transfer speed of the filling liquid from the heating dish (4) to the storage oil tank (13). When the transfer of the filling liquid from the heating dish (4) to the storage oil tank (13) is completed, the second manual shut-off valve (6), the second glass vacuum valve (12), and the fifth manual shut-off valve (24) are closed, and the filling liquid pretreatment process is completed; When it is not necessary to transfer the filling liquid and the filling liquid storage process is carried out, the second glass vacuum valve (12), the fourth manual shut-off valve (18), and the sixth glass vacuum valve (19) are closed, the third manual shut-off valve (9) and the first glass vacuum valve (11) are opened, and the vacuum pump (1) is turned on to extract the air in the heating dish (4), the storage oil tank (13), and the oil filling container (20) to a vacuum state, that is, the filling liquid is stored in a vacuum state; During the process of filling the sensor with oil, close the second manual stop valve (6), the third manual stop valve (9), the first glass vacuum valve (11), the second glass vacuum valve (12), the third glass vacuum valve (14), the fifth glass vacuum valve (15), the fourth glass vacuum valve (17), the fourth manual stop valve (18), the sixth glass vacuum valve (19) and the fifth manual stop valve (24). Place the sensor to be filled with oil in the filling container (20) in a sealed manner. Open the third manual stop valve (9), the first glass vacuum valve (11) and the fourth glass vacuum valve (17). Start the vacuum pump (1). Open the fifth glass vacuum valve (15) and the sixth glass vacuum valve (19). The filling liquid flows into the filling container (20) from the oil storage tank (13) by gravity. If the filling liquid cannot flow into the filling container (20) from the oil storage tank (13) by gravity, then open the fifth manual stop valve (24) to make the constant volume container (23) communicate with the external atmosphere and be filled with gas. Then close the third manual stop valve (9) and the fifth manual stop valve (24). Open the fourth manual stop valve (18) to pressurize the oil storage tank (13). Adjust the manual adjustable throttle valve (22) to the second preset opening degree, so as to adjust the transfer speed of the filling liquid from the heating dish (4) to the oil storage tank (13) and the pressurizing speed of the oil storage tank (13). After the transfer of the filling liquid is completed, close the fourth manual stop valve (18). Open the third manual stop valve (9). The filling liquid flows from the oil storage tank (13) into the filling container (20). When the filling liquid in the filling container (20) reaches the preset height, close the fifth glass vacuum valve (15) and the sixth glass vacuum valve (19). The sensor to be filled with oil in the filling container (20) is automatically filled with oil. Close the third glass vacuum valve (14) and the fourth glass vacuum valve (17). Then perform a pressurization process. Open the fifth manual stop valve (24) to make the filling container (20) filled with gas. Then close the fifth manual stop valve (24). Open the third glass vacuum valve (14) to pressurize the filling container (20). Adjust the manual adjustable throttle valve (22) to the third preset opening degree to complete a pressurization process. Then repeat the pressurization process once for stepwise pressurization so that the pressure in the filling container (20) reaches the preset pressure. After the pressurization is completed, close the third glass vacuum valve (14). Open the fourth glass vacuum valve (17) to extract the air in the filling container (20) so that a vacuum state is formed in the filling container (20). Then continue to repeat the above pressurization process once until the sensor to be filled with oil is filled with oil. Finally, open the third glass vacuum valve (14) and the fifth manual stop valve (24). Then open the filling container (20) to take out the sensor filled with oil, and complete the oil filling process.

7. The degassing, storing and oil filling method of the integrated device according to claim 6, characterized in that: The sensor to be filled with oil is specifically a silicon-based pressure sensor.

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