Integrated oil filtering and oil storage device and fully automatic control method

Abstract

An integrated oil filtering and oil storage device and a fully automatic control method. The integrated oil filtering and oil storage device comprises a waste oil tank (400), a first clean oil tank (200), a second clean oil tank (300) and a vacuum oil filter (100), wherein the waste oil tank (400) is provided with a fourth liquid level switch (401) and a fifth liquid level switch (402), which are used for determining the liquid level in the waste oil tank (400) and controlling the start or stop of an oil replenishment process; the first clean oil tank (200) is provided with a first liquid level switch (201) and a second liquid level switch (202), which are used for determining the liquid level in the first clean oil tank (200) and controlling the start or stop of first oil filtering and oil injection processes; the second clean oil tank (300) is provided with an eighth liquid level switch (302) and a ninth liquid level switch (303), which are used for determining the liquid level of clean oil in the second clean oil tank (300) and controlling the start or stop of second oil filtering and oil injection processes. The device has the functions of oil filtering, waste oil storage and clean oil storage; and by means of the liquid level switches, a fully automatic control process is achieved without requiring manual operation, and the functions of automatic oil filtering, automatic clean oil storage and automatic waste oil storage can be achieved, thereby avoiding the risks of device malfunction and misoperation.

Description

An integrated oil filtration and storage device and its fully automatic control method Technical Field

[0001] This application relates to the field of automatic control system technology, specifically to an integrated oil filtration and storage device and a fully automatic control method. Background Technology

[0002] Before being connected to the network, transformer oil chromatography online monitoring systems must undergo standard oil sample calibration. Only those that pass calibration can be put into field use. This means that the error between the content of characteristic gases of each component in the standard oil sample and the offline data of the standard oil sample is within acceptable limits. The preparation of standard oil samples requires first filtering waste oil into clean oil using an oil filter, and then preparing the standard oil sample using an oil mixing machine. Currently, filtering waste oil into clean oil using an oil filter requires manual operation, such as starting the oil filter, manually switching the temperature switch, manually switching the valve, checking the oil filtration volume, and manually adding waste oil, which poses a significant risk of human error and misoperation. Before each preparation of standard oil samples, waste oil needs to be filtered for 4-6 hours, and then the oil mixing machine is started to prepare the standard oil sample. The entire oil preparation cycle is long and inefficient.

[0003] Chinese patent CN118047136A discloses an integrated oil storage and filtration device, which includes a capsule-type vacuum oil storage tank and a vacuum oil filtration machine. It describes that the oil can be stored for a long time without being affected by oxidation or moisture; and describes the filtration effect of the vacuum oil filtration machine. However, the capsule-type vacuum oil storage tank in the above patent has a short lifespan due to the influence of the capsule material and is not suitable for storing oil samples for a long time. At the same time, it does not reflect a fully automatic oil filtration and storage control method; and it does not reflect the automatic collection and automatic filtration of waste oil.

[0004] Chinese patent CN109360717A discloses a transformer oil filtration device and system. It invented a simplified oil filtration device that uses the oil tank of a small-capacity transformer as a fixed oil filtration container to form an external circulation automatic oil filtration with the oil filtration machine body. However, the invention only focuses on the oil filtration system and does not reflect the automatic oil storage link or the linkage between automatic oil storage and automatic oil filtration.

[0005] Chinese patent CN103996496A discloses a two-way oil filtration device for transformer oil. The two-way oil filtration device for transformer oil provided by this invention uses two oil storage tanks, left and right. The oil in one tank is filtered and sent to the other tank through an oil filter, and then filtered back. The invention only focuses on the oil filtration system and does not reflect the automatic oil storage link or the link between automatic oil storage and automatic oil filtration.

[0006] In view of this, the present invention is proposed. Summary of the Invention

[0007] To address the shortcomings of existing technologies, the purpose of this application is to provide an integrated oil filtration and storage device and a fully automatic control method, comprising: a waste oil tank, a vacuum oil filter, a first clean oil tank, and a second clean oil tank integrated into one device, and a closed-loop fully automatic control process designed, which can realize automatic oil filtration, automatic storage of clean oil, and automatic storage of waste oil without human intervention, and always has filtered clean oil available for use.

[0008] One aspect of this application provides an integrated oil filtration and storage device, comprising: a waste oil tank, a first clean oil tank, a second clean oil tank, and a vacuum oil filter;

[0009] The waste oil tank is connected to the first clean oil tank via a vacuum oil filter, which is used to automatically collect waste oil used in the production line or tooling, and to provide waste oil to be filtered to the first clean oil tank.

[0010] The first clean oil tank and the second clean oil tank are connected by a vacuum oil filter, which is used to inject the filtered clean oil into the second clean oil tank while filtering waste oil;

[0011] The second clean oil tank is used to store filtered clean oil and to supply oil to the production line or tooling;

[0012] The waste oil tank is equipped with a fourth liquid level switch and a fifth liquid level switch, which are used to determine the liquid level in the waste oil tank and control the start or stop of the oil replenishment process.

[0013] The first clean oil tank is equipped with a first liquid level switch and a second liquid level switch, which are used to determine the liquid level in the first clean oil tank and control the start or stop of the oil filtration and oil filling process.

[0014] The second clean oil tank is equipped with an eighth level switch and a ninth level switch, which are used to determine the clean oil level in the second clean oil tank and control the start or stop of the oil filtration and oil injection process.

[0015] Furthermore, the vacuum oil filtration machine comprises: a primary filter, a heating control system, a vacuum flash tower, a circulating screw pump, a first one-way check valve, a pressure controller, a secondary filter, a precision filter, an automatic defoaming device, a first vacuum valve, a water vapor separation device, a Roots pump, and a vacuum pump;

[0016] One end of the primary filter is connected to the oil outlet of the waste oil tank and the first clean oil tank, respectively, and the other end is connected to one end of the heating control system.

[0017] The other end of the heating control system is connected to one end of the vacuum flash tower, the other end of the vacuum flash tower is connected to one end of the circulating screw pump, the other end of the circulating screw pump is connected to one end of the first one-way check valve, the other end of the one-way check valve is connected to one end of the pressure controller, the other end of the pressure controller is connected to one end of the secondary filter, and the other end of the secondary filter is connected to one end of the precision filter.

[0018] The other end of the precision filter is connected to the inlet of the waste oil tank, the first clean oil tank, and the second clean oil tank, respectively.

[0019] One end of the automatic defoaming device is connected to one end of the vacuum flash tower, and the other end is connected to the first vacuum valve. The other end of the first vacuum valve is connected to one end of the water vapor separation device. The other end of the water vapor separation device is connected to the Roots pump. One end of the Roots pump is connected to one end of the vacuum pump, and the other end of the vacuum pump is connected to the exhaust port.

[0020] Furthermore, the first clean oil tank is also equipped with a first internal circulation solenoid valve and a second internal circulation solenoid valve. One end of the first internal circulation solenoid valve is connected to the oil inlet of the first clean oil tank, and the other end is connected to the precision filter.

[0021] One end of the second internal circulation solenoid valve is connected to the oil outlet of the first clean oil tank, and the other end is connected to the primary filter.

[0022] Furthermore, the first liquid level switch is located below the second liquid level switch. The first liquid level switch is used to determine whether the liquid level in the first clean oil tank is at the set minimum liquid level. If so, the oil filtration and oil injection process is started to inject oil from the waste oil tank.

[0023] The second liquid level switch is used to determine whether the liquid level in the first clean oil tank is at the set maximum liquid level. If so, the oil filtration and oil filling processes are stopped.

[0024] The first clean oil tank is also equipped with a third liquid level switch, located above the second liquid level switch, which is used to determine whether the second liquid level switch is faulty.

[0025] Furthermore, the second clean oil tank is also equipped with a seventh liquid level switch, a tenth liquid level switch, a second oil inlet solenoid valve, and a second vacuum valve;

[0026] The seventh liquid level switch is located below the eighth liquid level switch and is used to determine whether the liquid level in the second clean oil tank is at the set minimum liquid level. If so, the oil filtration and oil injection process is started, the second oil inlet solenoid valve is opened to inject oil, and the second vacuum valve is started to evacuate the second clean oil tank.

[0027] The eighth liquid level switch is used to determine whether the liquid level of the second clean oil tank has reached the fixed dead oil zone. If not, the second oil filtration and oil injection process is started to confirm that there is clean oil available for use in real time.

[0028] The ninth liquid level switch is located above the eighth liquid level switch and is used to determine whether the liquid level in the second clean oil tank is at the set maximum liquid level. If so, the oil filtration and oil filling process is stopped.

[0029] The tenth liquid level switch is located above the ninth liquid level switch and is used to determine whether the ninth liquid level switch is faulty.

[0030] Furthermore, the waste oil tank is also equipped with a sixth liquid level switch, an oil replenishment solenoid valve, and a first oil outlet valve;

[0031] The fourth liquid level sensor is used to determine whether the liquid level in the waste oil tank is at the set minimum liquid level. If so, it controls the start of the oil replenishment process.

[0032] The fifth liquid level sensor is located above the fourth liquid level sensor and is used to determine whether the liquid level in the waste oil tank is at the set minimum liquid level. If so, the oil replenishment process is stopped.

[0033] The sixth liquid level switch is located above the fifth liquid level switch and is used to indicate that the liquid level in the waste oil tank has reached the set alarm range and that oil needs to be drained.

[0034] One end of the oil replenishing solenoid valve is connected to the precision filter, and the other end is connected to the second oil inlet of the waste oil tank. One end of the first oil outlet valve is connected to the waste oil tank, and the other end is connected to the primary filter.

[0035] Furthermore, it also includes a replenishing valve and a first inlet solenoid valve;

[0036] One end of the oil replenishing valve is connected to an external oil tank, and the other end is connected to one end of the first oil inlet solenoid valve. It is used to replenish oil from the external oil tank when the oil in the waste oil tank is insufficient.

[0037] The other end of the first oil outlet valve is connected to the first oil inlet solenoid valve, and the other end of the first oil inlet solenoid valve is connected to the primary filter.

[0038] Furthermore, the waste oil tank, the first clean oil tank, and the second clean oil tank are all equipped with a cleaning port, a level gauge, a breather, an exhaust valve, and an oil drain valve;

[0039] The second clean oil tank is also equipped with a sampling port, a second oil outlet valve, and a second one-way check valve. The sampling port is used for sampling.

[0040] One end of the second oil outlet valve is connected to the second clean oil tank, and the other end is connected to the second one-way check valve. The second clean oil tank supplies oil to the production line and tooling through the second oil outlet valve and the second one-way check valve.

[0041] A second aspect of this application provides a fully automatic control method for an integrated oil filtration and storage device, the method comprising: after the device is powered on...

[0042] Step S1: Determine whether the state of the second liquid level switch on the first clean oil tank is 1. If yes, execute the first oil filtration process; otherwise, execute step S2.

[0043] Step S2: Within the set time, pour oil from the waste oil tank into the first clean oil tank; obtain the status of the second and third liquid level switches in real time to determine whether the oil filling is complete. If not, determine that the oil replenishment process needs to be executed; if so, start the oil filtration process.

[0044] Step S3: Start the oil filtration process, filter the oil in the first clean oil tank in the vacuum oil filter, and time the filtration time.

[0045] Step S4: Obtain the filtration time and determine whether the filtration time exceeds the set running time. If so, stop oil filtration.

[0046] Step S5: Determine whether the state of the eighth liquid level switch in the second clean oil tank is 1. If yes, continue to wait; if no, determine that the oil filling process needs to be executed.

[0047] Step S6: Within the set time, inject the oil from the first clean oil tank into the second clean oil tank; obtain the status of the ninth and tenth liquid level switches in real time, and determine whether the oil injection is complete. If so, stop the oil injection.

[0048] Further, in step S2 above, the oil replenishment process is as follows: determine the state of the fourth liquid level switch on the waste oil tank. If the state of the fourth liquid level switch is 0, the system automatically starts the oil replenishment process, injects the set amount of oil into the waste oil tank, and continues to execute the oil inlet process in the first clean oil tank.

[0049] In step S2, when the state of the second liquid level switch is 1 and the state of the third liquid level switch is 0, it is determined that the oil filling from the waste oil tank to the first clean oil tank is completed.

[0050] In step S6, when the state of the ninth liquid level switch is 1 and the state of the tenth liquid level switch is 0, it is determined that the oil filling from the first clean oil tank to the second clean oil tank is completed.

[0051] Compared with the prior art, this application has at least one of the following beneficial effects:

[0052] 1. This application, by setting up an integrated device comprising an interconnected waste oil tank, a first clean oil tank, a second clean oil tank, and a vacuum oil filter, not only includes the function of an oil filter but also includes the storage, filtration, and storage of waste oil and the filtered clean oil. It also features a closed-loop, fully automatic control process, requiring no manual operation. When the level in the second clean oil tank is low, it automatically replenishes oil from the first clean oil tank; when the level in the first clean oil tank is low, it replenishes oil from the waste oil tank, automatically starts the vacuum oil filter, takes waste oil from the waste oil tank for filtration, and stores the filtered oil in the first clean oil tank. The waste oil tank can automatically collect waste oil used by the production line or tooling. If the level in the waste oil tank is low, it automatically injects waste oil from the outside. Through this fully automatic control process, it achieves automatic oil filtration, automatic storage of clean oil, and automatic storage of waste oil without manual operation, thus avoiding the risks of device malfunction or misoperation.

[0053] 2. This application reserves a clean oil dead oil zone in the second clean oil tank, so that clean oil is always available in the second clean oil tank. This ensures that clean oil is available when preparing standard oil samples, eliminating the need for waste oil filtration and improving the efficiency of standard oil sample preparation. Attached Figure Description

[0054] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0055] Figure 1 is a schematic diagram of an integrated oil filtration and storage device according to an embodiment of this application.

[0056] Figure 2 is a structural diagram of an integrated oil filtration and storage device according to an embodiment of this application.

[0057] Figure 3 is a structural dimension diagram of an integrated oil filtration and storage device according to an embodiment of this application.

[0058] Figure 4 is a flowchart of a fully automatic control method for an integrated oil filtration and storage device according to an embodiment of this application.

[0059] Figure 5 is a detailed flowchart of a fully automatic control method for an integrated oil filtration and storage device according to an embodiment of this application.

[0060] In the diagram: 100. Vacuum oil filter; 101. Primary filter; 102. Heating control system; 103. Vacuum flash tower; 1031. Atomization separation zone; 1032. Eleventh level switch; 104. Circulating screw pump; 105. First one-way check valve; 106. Pressure controller; 107. Secondary filter; 108. Precision filter; 109. Automatic defoaming device; 110. First vacuum valve; 111. Water vapor separator; 112. Roots pump; 113. Vacuum pump; 200. First clean oil tank; 201. First level switch; 202. Second level switch; 203. Third level switch; 204. First internal circulation solenoid valve; 205. Second internal circulation... Solenoid valve; 300, Second clean oil tank; 301, Seventh level switch; 302, Eighth level switch; 303, Ninth level switch; 304, Tenth level switch; 305, Second oil inlet solenoid valve; 306, Second vacuum valve; 307, Sampling port; 308, Second oil outlet valve; 309, Second one-way check valve; 400, Waste oil tank; 401, Fourth level switch; 402, Fifth level switch; 403, Sixth level switch; 404, First oil outlet valve; 405, First oil replenishment solenoid valve; 406, First oil inlet solenoid valve; 407, Oil replenishment valve; 500, Cleaning port; 600, Oil drain valve; 700, Exhaust valve; 800, Breather; 900, Level gauge. Detailed Implementation

[0061] The present application will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present application, but do not limit the present application in any way. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present application. These all fall within the protection scope of the present application.

[0062] This application utilizes an integrated device comprising an interconnected waste oil tank 400, a first clean oil tank 200, a second clean oil tank 300, and a vacuum oil filter 100 to store, filter, and store the filtered clean oil. A closed-loop, fully automated control process is designed, requiring no manual operation. When the level in the second clean oil tank 300 is low, oil is automatically replenished from the first clean oil tank 200; when the level in the first clean oil tank 200 is low, oil is replenished from the waste oil tank 400. The vacuum oil filter 100 automatically starts, taking waste oil from the waste oil tank 400 for filtration, and storing the filtered oil in the first clean oil tank 200. The waste oil tank 400 can automatically collect waste oil used by the production line or tooling. If the level in the waste oil tank 400 is low, waste oil is automatically injected from outside, ensuring that the second clean oil tank 300 always has clean oil available for use. When preparing standard oil samples, there is no need to wait for the filtration process, resulting in high oil preparation efficiency.

[0063] Referring to FIG1, an embodiment of this application shows an integrated oil filtration and storage device, including: a waste oil tank 400, a first clean oil tank 200, a second clean oil tank 300, and a vacuum oil filter 100.

[0064] Waste oil tank 400 is connected to the first clean oil tank 200 via a vacuum oil filter 100. It automatically collects waste oil used in the production line or tooling and provides waste oil to be filtered to the first clean oil tank 200. The first clean oil tank 200 is connected to the second clean oil tank 300 via the vacuum oil filter 100. While filtering waste oil, the filtered clean oil is injected into the second clean oil tank 300. The second clean oil tank 300 stores the filtered clean oil and supplies oil to the production line or tooling.

[0065] Waste oil tank 400 is equipped with a fourth level switch 401 and a fifth level switch 402 to determine the liquid level in waste oil tank 400 and control the start or stop of the oil replenishment process. First clean oil tank 200 is equipped with a first level switch 201 and a second level switch 202 to determine the liquid level in first clean oil tank 200 and control the start or stop of the oil filtration and oil filling processes. Second clean oil tank 300 is equipped with an eighth level switch 302 and a ninth level switch 302 to determine the clean oil level in second clean oil tank 300 and control the start or stop of the oil filtration and oil filling processes.

[0066] This application establishes a device that integrates the functions of storing waste oil, filtering waste oil, and storing filtered clean oil by setting up a waste oil tank 400, a first clean oil tank 200, a second clean oil tank 300, and a vacuum oil filter 100. The device achieves automated management by automatically determining whether to perform processes such as oil replenishment, oil filtration, and oil injection using a liquid level switch, thereby reducing manual intervention and improving work efficiency and accuracy.

[0067] In the above embodiments, the vacuum oil filter 100 comprises: a primary filter 101, a heating control system 102, a vacuum flash tower 103, a circulating screw pump 104, a first one-way check valve 105, a pressure controller 106, a secondary filter 107, a precision filter 108, an automatic defoaming device 109, a first vacuum valve 110, a water vapor separator 111, a Roots pump 112, and a vacuum pump 113.

[0068] Specifically, one end of the primary filter 101 is connected to the oil outlet of the waste oil tank 400 and the first clean oil tank 200, respectively, and the other end is connected to one end of the heating control system 102.

[0069] The other end of the heating control system 102 is connected to one end of the vacuum flash tower 103, the other end of the vacuum flash tower 103 is connected to one end of the circulating screw pump 104, the other end of the circulating screw pump 104 is connected to one end of the first one-way check valve 105, the other end of the one-way check valve 105 is connected to one end of the pressure controller 106, the other end of the pressure controller 106 is connected to one end of the secondary filter 107, and the other end of the secondary filter 107 is connected to one end of the precision filter 108.

[0070] The other end of the precision filter 108 is connected to the oil inlet of the waste oil tank 400, the first clean oil tank 200, and the second clean oil tank 300, respectively.

[0071] One end of the automatic defoaming device 109 is connected to one end of the vacuum flash tower 103, and the other end is connected to the first vacuum valve 110. The other end of the first vacuum valve 110 is connected to one end of the water vapor separator 111. The other end of the water vapor separator 111 is connected to the Roots pump 112. One end of the Roots pump 112 is connected to one end of the vacuum pump 113, and the other end of the vacuum pump 113 is connected to the exhaust port.

[0072] The waste oil tank 400 is connected to the vacuum oil filter 100. When the first clean oil tank 200 needs to be filled with oil, the oil in the waste oil tank 400 first passes through the primary filter 101 to filter out large particulate impurities. Then, the heating control system 102 heats the oil to be filtered at a constant temperature to facilitate the separation of gases from the oil. Next, the vacuum flash evaporator 103, together with the first vacuum valve 110, the Roots pump 112, and the vacuum pump 113, effectively separates gases from the oil under extreme vacuum conditions. The circulating screw pump 104, together with the secondary filter 107, the precision filter 108, and solenoid valves with different passages, pumps the oil to a designated position, achieving the filtration of impurities larger than 0.5 μm. The filtration precision can be modified as needed.

[0073] Among them, the heating control system 102 is an infrared electric heating control system 102.

[0074] The vacuum flash tower 103 has an atomizing separator 1031, an automatic defoaming device 109, and an infrared electric heating control system 102 connected to the atomizing separator 1031. The vacuum flash tower 103 is equipped with an eleventh liquid level switch 1032 and a liquid level gauge 900 for detecting the liquid level of the vacuum flash tower 103.

[0075] In one possible embodiment, the first clean oil tank 200 is further provided with a first internal circulation solenoid valve 204 and a second internal circulation solenoid valve 205. One end of the first internal circulation solenoid valve 204 is connected to the oil inlet of the first clean oil tank 200, and the other end is connected to the precision filter 108. One end of the second internal circulation solenoid valve 205 is connected to the oil outlet of the first clean oil tank 200, and the other end is connected to the primary filter 101.

[0076] By installing a first internal circulation solenoid valve 204 and a second internal circulation solenoid valve 205 on the first clean oil tank 200, during operation, by opening the first internal circulation solenoid valve 204, the waste oil in the waste oil tank 400 passes through the vacuum oil filter 100, and the filtered oil is injected into the first clean oil tank 200. When the first clean oil tank 200 performs the oil filtration process, the second internal circulation solenoid valve 205 filters the oil from the first clean oil tank 200 through the vacuum oil filter 100 and the first internal circulation solenoid valve 204, thus filtering the waste oil into clean oil.

[0077] In some possible embodiments, a first level switch 201 is located below a second level switch 202. The first level switch 201 is used to determine whether the liquid level in the first clean oil tank 200 is at a set minimum level. If so, it controls the oil filtration and filling process to start, filling oil from the waste oil tank 400. The second level switch 202 is used to determine whether the liquid level in the first clean oil tank 200 is at a set maximum level. If so, it controls the oil filtration and filling process to stop. The first clean oil tank 200 is also provided with a third level switch 203, located above the second level switch 202, used to determine whether the second level switch 202 is malfunctioning.

[0078] Specifically, the first clean oil tank 200 mainly consists of a first level switch 201, a second level switch 202, a third level switch 203, a first internal circulation solenoid valve 204, and a second internal circulation solenoid valve 205. The first level switch 201 indicates a low level alarm in the first clean oil tank 200, requiring the oil filtration process to be started and oil to be added. The second level switch 202 indicates a high level alarm in the first clean oil tank 200, stopping the oil addition process. During oil addition, if the oil level in the first clean oil tank 200 reaches the third level switch 203, the third level switch 203 indicates a malfunction in the first clean oil tank 200, possibly indicating a malfunction in the second level switch 202, requiring sensor replacement.

[0079] When oil needs to be added, the first internal circulation solenoid valve 204 can add oil to the first clean oil tank 200 through the valve, and the second internal circulation solenoid valve 205 can discharge oil from the first clean oil tank 200 through the valve.

[0080] The first clean oil tank 200 is designed with an effective volume of 600L, and the effective volume can be modified as needed.

[0081] As shown in Figure 1, the functions of the first clean oil tank 200 include: filtering waste oil.

[0082] Waste oil filtration: The first clean oil tank 200, in conjunction with the vacuum oil filter 100, circulates and filters a fixed volume of waste oil. The oil continuously circulates through the second internal circulation solenoid valve 205, the primary filter 101, the heating control system 102, the vacuum flash tower 103, the screw pump, the pressure controller 106, the secondary filter 107, the precision filter 108, and back to the first internal circulation solenoid valve 204. The vacuum valve, Roots pump 112, and vacuum pump 113 on the vacuum flash tower 103 are open, placing the vacuum flash tower 103 under ultimate vacuum.

[0083] In some possible embodiments, the second clean oil tank 300 is also equipped with a seventh liquid level switch 301, a tenth liquid level switch 304, a second oil inlet solenoid valve 305, and a second vacuum valve 306.

[0084] The seventh liquid level switch 301 is located below the eighth liquid level switch 302. It is used to determine whether the liquid level in the second clean oil tank 300 is at the set minimum liquid level. If so, it controls the start of the oil filtration and oil filling process, opens the second oil inlet solenoid valve 305 to fill the oil, and at the same time starts the second vacuum valve 306 to evacuate the second clean oil tank 300.

[0085] The functions of the first clean oil tank 200 also include: injecting oil into the second clean oil tank 300 by injecting filtered clean oil into the second clean oil tank 300 through the second internal circulation solenoid valve 205 of the first clean oil tank 200 - primary filter 101 - heating control system 102 - vacuum flash tower 103 - screw pump - pressure controller 106 - secondary filter 107 - precision filter 108 - oil inlet solenoid valve of the second clean oil tank 300.

[0086] The eighth level switch 302 is used to determine whether the liquid level in the second clean oil tank 300 has reached the fixed dead oil zone. If not, it controls the second oil filtration and injection process to start, ensuring that clean oil is available for use in real time. The ninth level switch 303 is located above the eighth level switch 302 and is used to determine whether the liquid level in the second clean oil tank 300 is at the set maximum level. If so, it controls the oil filtration and injection process to stop. The tenth level switch 304 is located above the ninth level switch 303 and is used to determine whether the ninth level switch 303 is malfunctioning.

[0087] In the above embodiment, specifically, the second clean oil tank 300 mainly consists of a seventh level switch 301, an eighth level switch 302, a ninth level switch 303, a tenth level switch 304, a second oil inlet solenoid valve 305, and a second vacuum valve 306. Specifically, the seventh level switch 301 indicates a low oil level alarm in the second clean oil tank 300, suggesting a possible device malfunction; the eighth level switch 302 indicates that the fixed dead oil zone in the second clean oil tank 300 ensures that clean oil is always available; the ninth level switch 303 indicates an high oil level alarm in the second clean oil tank 300, indicating the end of the oil filling process; and the tenth level switch 304 indicates a possible device malfunction, possibly due to a fault in the ninth level switch 303. The second oil inlet solenoid valve 305 fills the second clean oil tank 300 with oil. The second vacuum valve 306 works in conjunction with the second oil inlet solenoid valve 305, and the second clean oil tank 300 is stored under vacuum after being filled with oil.

[0088] The second clean oil tank 300 is designed with an effective volume of 600L, and the effective volume can be modified as needed.

[0089] The functions of the second clean oil tank 300 include: storing filtered clean oil and supplying oil to production lines and tooling.

[0090] The filtered clean oil is stored in the second clean oil tank 300, which receives oil from the first clean oil tank 200 while simultaneously drawing a vacuum through the second vacuum valve 306. The oil is stored in a vacuum state, which prevents the clean oil from coming into contact with air.

[0091] To supply oil to the production line and tooling, the second clean oil tank 300 is equipped with a dead oil level. When the level is lower than this level, oil is automatically added to ensure that there is clean oil available for use in real time.

[0092] In some possible embodiments, the waste oil tank 400 is also equipped with a sixth liquid level switch 403, an oil replenishment solenoid valve, and a first oil outlet valve 404.

[0093] The fourth liquid level sensor is used to determine whether the liquid level in the waste oil tank 400 is at the set minimum liquid level. If so, it controls the start of the oil replenishment process. The fifth liquid level sensor is located above the fourth liquid level sensor and is used to determine whether the liquid level in the waste oil tank 400 is at the set minimum liquid level. If so, it controls the stop of the oil replenishment process. The sixth liquid level switch 403 is located above the fifth liquid level switch 402 and is used to indicate that the liquid level in the waste oil tank 400 has reached the set alarm range and that oil needs to be drained.

[0094] One end of the oil replenishing solenoid valve is connected to the precision filter 108, and the other end is connected to the second oil inlet of the waste oil tank 400. One end of the first oil outlet valve 404 is connected to the waste oil tank 400, and the other end is connected to the primary filter 101.

[0095] In the above embodiment, specifically, the waste oil tank 400 mainly consists of a fourth level switch 401, a fifth level switch 402, a sixth level switch 403, a first oil replenishing solenoid valve 405, and a first oil outlet valve 404. The fourth level switch 401 indicates a low level alarm in the waste oil tank 400, requiring the replenishment of waste oil; the fifth level switch 402 indicates a warning level alarm in the waste oil tank 400, prohibiting the injection of waste oil; and the sixth level switch 403 indicates a high level alarm in the waste oil tank 400, requiring the discharge of some waste oil. The first oil replenishing solenoid valve 405 automatically replenishes the waste oil tank 400 when the oil level is insufficient. The first oil outlet valve 404 dispenses oil from the first clean oil tank 200.

[0096] The waste oil tank 400 is designed with an effective volume of 1000L, and the effective volume can be modified as needed.

[0097] In some possible embodiments, a replenishing valve 407 and a first inlet solenoid valve 406 are also included.

[0098] One end of the oil replenishing valve 407 is connected to an external oil tank, and the other end is connected to one end of the first oil inlet solenoid valve 406. It is used to replenish oil from the external oil tank when the oil in the waste oil tank 400 is insufficient. The other end of the first oil outlet valve 404 is connected to the first oil inlet solenoid valve 406, and the other end of the first oil inlet solenoid valve 406 is connected to the primary filter 101.

[0099] When the liquid level in the waste oil tank 400 is low, an external oil tank is connected through the oil replenishment valve 407, and then the external oil is injected into the waste oil tank 400 through the vacuum oil filter 100 via the first oil inlet solenoid valve 406 and the first oil replenishment solenoid valve 405.

[0100] The waste oil tank 400 has the following functions: storing waste oil and providing waste oil to be filtered to the first clean oil tank 200.

[0101] The waste oil storage system includes automatically collecting waste oil used in production lines or tooling, and replenishing waste oil from the outside by injecting oil into the waste oil tank 400 through the following channels: oil replenishment valve 407 - first oil inlet solenoid valve 406 - primary filter 101 - heating control system 102 - vacuum flash tower 103 - screw pump - pressure controller 106 - secondary filter 107 - precision filter 108 - first oil replenishment solenoid valve 405.

[0102] Waste oil to be filtered is supplied to the first clean oil tank 200 by injecting waste oil from the waste oil tank 400 through the first oil outlet valve 404, the first oil inlet solenoid valve 406, the primary filter 101, the heating control system 102, the vacuum flash tower 103, the circulating screw pump 104, the pressure controller 106, the secondary filter 107, the precision filter 108, and the first internal circulation solenoid valve 204.

[0103] In some possible embodiments, the waste oil tank 400, the first clean oil tank 200 and the second clean oil tank 300 are each equipped with a cleaning port 500, a level gauge 900, a breather 800, an exhaust valve 700 and an oil drain valve 600.

[0104] Specifically, the waste oil tank 400 includes a cleaning port 500, a level gauge 900, a breather 800, an exhaust valve 700, and a drain valve 600. The exhaust valve 700 is connected to the breather 800, and the drain valve 600 is located at the bottom of the waste oil tank 400. The level gauge 900 allows manual observation of the liquid level in the waste oil tank 400. The exhaust valve 700 and the breather 800 are normally open, keeping the waste oil tank 400 at normal pressure. The breather 800 can filter moisture from the air. The cleaning port 500 and the drain valve 600 are normally closed and are used during manual cleaning of the oil tank for maintenance.

[0105] The first clean oil tank 200 includes a cleaning port 500, a level gauge 900, a breather 800, an exhaust valve 700, and a drain valve 600. The level gauge 900 allows manual observation of the liquid level in the first clean oil tank 200. The exhaust valve 700 and the breather 800 are normally closed, but will be opened during maintenance of the first clean oil tank 200. The cleaning port 500 and the drain valve 600 are normally closed and are used during manual cleaning of the oil tank. The drain valve 600 is located only at the bottom of the first clean oil tank 200.

[0106] The second clean oil tank 300 includes a cleaning port 500, a level gauge 900, a breather 800, an exhaust valve 700, and a drain valve 600. The drain valve 600 is located at the bottom of the second clean oil tank 300. The level gauge 900 allows manual observation of the liquid level in the second clean oil tank 300. The exhaust valve 700 and the breather 800 are normally closed, but will be opened during maintenance of the second clean oil tank 300. The cleaning port 500 and the drain valve 600 are normally closed and are used during manual cleaning of the oil tank during maintenance.

[0107] The second clean oil tank 300 is also equipped with a sampling port 307, a second oil outlet valve 308, and a second one-way check valve 309. The sampling port 307 is used for sampling. One end of the second oil outlet valve 308 is connected to the second clean oil tank 300, and the other end is connected to the second one-way check valve 309. The second clean oil tank 300 supplies oil to the production line and tooling through the second oil outlet valve 308 and the second one-way check valve 309.

[0108] The functions of the vacuum oil filter 100 include: controlling the operation of the heating control system 102, vacuum valve, water-air separator, Roots pump 112, vacuum pump 113, and circulating screw pump 104. During oil filtration in the first clean oil tank 200, the vacuum flash evaporator 103 is placed in an extreme environment, and the heating control system 102 and screw pump are activated. During oil filling in the second clean oil tank 300, the second clean oil tank 300 is placed in an extreme vacuum environment.

[0109] A second aspect of this application provides a fully automatic control method for an integrated oil filtration and storage device, the method comprising: after the device is powered on...

[0110] Step S1: Determine whether the state of the second liquid level switch 202 on the first clean oil tank 200 is 1. If yes, execute the oil filtration process; otherwise, execute step S2.

[0111] Step S2: Within the set time, the oil in the waste oil tank 400 is injected into the first clean oil tank 200; the status of the second liquid level switch 202 and the third liquid level switch 203 is obtained in real time to determine whether the oil injection is completed. If not, it is determined that the oil replenishment process needs to be executed; if so, the oil filtration process is started.

[0112] Step S3: Start the oil filtration process, filter the oil in the first clean oil tank 200 in the vacuum oil filter 100, and time the filtration time.

[0113] Step S4: Obtain the filtration time and determine whether the filtration time exceeds the set running time. If so, stop oil filtration.

[0114] Step S5: Determine whether the state of the eighth liquid level switch 302 in the second clean oil tank 300 is 1. If yes, continue to wait; if no, determine that the oil filling process needs to be executed.

[0115] Step S6: Within a set time, inject the oil from the first clean oil tank 200 into the second clean oil tank 300; obtain the status of the ninth level switch 303 and the tenth level switch 304 in real time, and determine whether the oil injection is complete. If so, stop the oil injection.

[0116] In the above steps, 1 indicates that the liquid level has exceeded the position, and 0 indicates that the liquid level is below the position. The following design of the liquid level switch uses the same definition for 0 and 1.

[0117] Specifically, when the device starts working, it first determines whether an oil filling operation needs to be performed by checking whether the state of the second liquid level switch 202 on the first clean oil tank 200 is 1. When the state of the second liquid level switch 202 is 0, it is determined that oil needs to be filled. Within a set time, the oil in the waste oil tank 400 is controlled to be injected into the first clean oil tank 200. In the middle, it is filtered once by the vacuum oil filter 100. The states of the second liquid level switch 202 and the third liquid level switch 203 are obtained in real time. It is determined whether the states of the second liquid level switch 202 and the third liquid level switch 203 meet the conditions for oil filling to be completed. If so, it is determined that oil filling is completed and the oil filtration process is carried out.

[0118] Next, the oil filtration process is initiated, filtering the oil in the first clean oil tank 200 through the vacuum oil filter 100. The filtration time is timed and recorded, and it is determined whether the filtration time exceeds the set operating time. If so, the waste oil is considered filtered completely, and the filtration process is stopped. During filtration, the first internal circulation solenoid valve 204, the second internal circulation solenoid valve 205, the heating control system 102 (constant temperature 50℃), the vacuum solenoid valve, the Roots pump 112, and the vacuum pump 113 are opened. If abnormal temperature or pressure occurs during operation, a malfunction is identified. The relevant parameters can be modified according to different requirements.

[0119] Then, after the oil filtration is completed, it is determined whether the state of the eighth liquid level switch 302 in the second clean oil tank 300 is 1. If yes, then wait. If no, it is determined that the oil filling process needs to be executed. Within the set time, the oil in the first clean oil tank 200 is injected into the second clean oil tank 300. The states of the ninth liquid level switch 303 and the tenth liquid level switch 304 are obtained in real time to determine whether the oil filling is completed. If yes, the oil filling is stopped and the above steps are repeated.

[0120] During the above process, when the waste oil tank 400 is filling the first clean oil tank 200, all other states of the level switch are judged as device malfunctions; when the first clean oil tank 200 is filling the second clean oil tank 300, all other states of the level switch are judged as device malfunctions.

[0121] In some possible embodiments, in step S2 above, the oil replenishment process is as follows: determine the state of the fourth liquid level switch 401 on the waste oil tank 400. If the state of the fourth liquid level switch 401 is 0, the system automatically starts the oil replenishment process, injects the set amount of oil into the waste oil tank 400, and continues to execute the oil inlet process in the first clean oil tank 200.

[0122] Specifically, when the states of the second liquid level switch 202 and the third liquid level switch 203 are acquired in real time to determine whether the oil filling is complete, if not, it is determined that the oil level in the waste oil tank 400 is low and the oil replenishment process needs to be executed. If the fourth liquid level switch 401 is 0, the system automatically injects 200L of oil into the waste oil tank 400 through an external oil drum (of course, in other embodiments, other volumes of oil can also be injected). At the same time, the oil filling process from the waste oil tank 400 to the first clean oil tank 200 continues, and the number of oil fillings is set to 3. If the state of the second liquid level switch 202 is 1 and the state of the third liquid level switch 203 is 0, it is determined that the oil filling is complete and the oil filtration process is started.

[0123] In step S2, when the state of the second liquid level switch 202 is 1 and the state of the third liquid level switch 203 is 0, it is determined that the oil filling from the waste oil tank 400 to the first clean oil tank 200 is completed.

[0124] In step S6, when the state of the ninth liquid level switch 303 is 1 and the state of the tenth liquid level switch 304 is 0, it is determined that the oil filling from the first clean oil tank 200 to the second clean oil tank 300 is completed.

[0125] After the oil filtration process is completed, the state of the eighth level switch 302 of the second clean oil tank 300 is checked. If the state of the eighth level switch 302 is 1, it is in a waiting state; if the state of the eighth level switch 302 is 0, the first clean oil tank 200 will fill the second clean oil tank 300 with oil within a set time. If the state of the ninth level switch 303 is 1 and the state of the tenth level switch 304 is 0, the first clean oil tank 200 will stop filling the second clean oil tank 300 with oil; if the state of the ninth level switch 303 is 0 and the state of the tenth level switch 304 is 0, it is determined that oil needs to be added to the first clean oil tank 200, and step 1 is continued.

[0126] This application, through the design of a fully automatic control process that matches the device, can achieve automatic oil filtration, automatic storage of clean oil, and automatic storage of waste oil without human operation, thus avoiding the risk of device malfunction or misoperation.

[0127] This application is mainly applied to the step of preparing clean oil before standard oil sample preparation, and is also applicable to application scenarios that require oil filtration and storage.

[0128] The specific embodiments of this application have been described above. It should be understood that this application is not limited to the specific embodiments described above, and those skilled in the art can make various modifications or variations within the scope of the claims, which do not affect the substantive content of this application. The above-described preferred features can be used in any combination without conflict.

Claims

1. An integrated oil filtration and storage device, characterized in that, include: Waste oil tank, first clean oil tank, second clean oil tank, and vacuum oil filter; The waste oil tank is connected to the first clean oil tank via a vacuum oil filter, which is used to automatically collect waste oil used in the production line or tooling, and to provide waste oil to be filtered to the first clean oil tank. The first clean oil tank and the second clean oil tank are connected by a vacuum oil filter, which is used to inject the filtered clean oil into the second clean oil tank while filtering waste oil; The second clean oil tank is used to store filtered clean oil and to supply oil to the production line or tooling; The waste oil tank is equipped with a fourth liquid level switch and a fifth liquid level switch, which are used to determine the liquid level in the waste oil tank and control the start or stop of the oil replenishment process. The first clean oil tank is equipped with a first liquid level switch and a second liquid level switch, which are used to determine the liquid level in the first clean oil tank and control the start or stop of the oil filtration and oil filling process. The second clean oil tank is equipped with an eighth level switch and a ninth level switch, which are used to determine the clean oil level in the second clean oil tank and control the start or stop of the oil filtration and oil injection process.

2. The integrated oil filtration and storage device according to claim 1, characterized in that, The vacuum oil filtration machine comprises: a primary filter, a heating control system, a vacuum flash tower, a circulating screw pump, a first one-way check valve, a pressure controller, a secondary filter, a precision filter, an automatic defoaming device, a first vacuum valve, a water vapor separation device, a Roots pump, and a vacuum pump. One end of the primary filter is connected to the oil outlet of the waste oil tank and the first clean oil tank, respectively, and the other end is connected to one end of the heating control system. The other end of the heating control system is connected to one end of the vacuum flash tower, the other end of the vacuum flash tower is connected to one end of the circulating screw pump, the other end of the circulating screw pump is connected to one end of the first one-way check valve, the other end of the one-way check valve is connected to one end of the pressure controller, the other end of the pressure controller is connected to one end of the secondary filter, and the other end of the secondary filter is connected to one end of the precision filter. The other end of the precision filter is connected to the inlet of the waste oil tank, the first clean oil tank, and the second clean oil tank, respectively. One end of the automatic defoaming device is connected to one end of the vacuum flash tower, and the other end is connected to the first vacuum valve. The other end of the first vacuum valve is connected to one end of the water vapor separation device. The other end of the water vapor separation device is connected to the Roots pump. One end of the Roots pump is connected to one end of the vacuum pump, and the other end of the vacuum pump is connected to the exhaust port.

3. The integrated oil filtration and storage device according to claim 2, characterized in that, The first clean oil tank is also equipped with a first internal circulation solenoid valve and a second internal circulation solenoid valve. One end of the first internal circulation solenoid valve is connected to the oil inlet of the first clean oil tank, and the other end is connected to the precision filter. One end of the second internal circulation solenoid valve is connected to the oil outlet of the first clean oil tank, and the other end is connected to the primary filter.

4. The integrated oil filtration and storage device according to claim 3, characterized in that, The first liquid level switch is located below the second liquid level switch. The first liquid level switch is used to determine whether the liquid level in the first clean oil tank is at the set minimum liquid level. If so, the oil filtration and oil injection process is started to inject oil from the waste oil tank. The second liquid level switch is used to determine whether the liquid level in the first clean oil tank is at the set maximum liquid level. If so, the oil filtration and oil filling processes are stopped. The first clean oil tank is also equipped with a third liquid level switch, located above the second liquid level switch, which is used to determine whether the second liquid level switch is faulty.

5. The integrated oil filtration and storage device according to claim 2, characterized in that, The second clean oil tank is also equipped with a seventh liquid level switch, a tenth liquid level switch, a second oil inlet solenoid valve, and a second vacuum valve; The seventh liquid level switch is located below the eighth liquid level switch and is used to determine whether the liquid level in the second clean oil tank is at the set minimum liquid level. If so, the oil filtration and oil injection process is started, the second oil inlet solenoid valve is opened to inject oil, and the second vacuum valve is started to evacuate the second clean oil tank. The eighth liquid level switch is used to determine whether the liquid level of the second clean oil tank has reached the fixed dead oil zone. If not, the second oil filtration and oil injection process is started to confirm that there is clean oil available for use in real time. The ninth liquid level switch is located above the eighth liquid level switch and is used to determine whether the liquid level in the second clean oil tank is at the set maximum liquid level. If so, the oil filtration and oil filling process is stopped. The tenth liquid level switch is located above the ninth liquid level switch and is used to determine whether the ninth liquid level switch is faulty.

6. The integrated oil filtration and storage device according to claim 2, characterized in that, The waste oil tank is also equipped with a sixth liquid level switch, an oil replenishment solenoid valve, and a first oil outlet valve. The fourth liquid level sensor is used to determine whether the liquid level in the waste oil tank is at the set minimum liquid level. If so, it controls the start of the oil replenishment process. The fifth liquid level sensor is located above the fourth liquid level sensor and is used to determine whether the liquid level in the waste oil tank is at the set minimum liquid level. If so, the oil replenishment process is stopped. The sixth liquid level switch is located above the fifth liquid level switch and is used to indicate that the liquid level in the waste oil tank has reached the set alarm range and that oil needs to be drained. One end of the oil replenishing solenoid valve is connected to the precision filter, and the other end is connected to the second oil inlet of the waste oil tank. One end of the first oil outlet valve is connected to the waste oil tank, and the other end is connected to the primary filter.

7. The integrated oil filtration and storage device according to claim 6, characterized in that, It also includes a replenishing valve and a first inlet solenoid valve; One end of the oil replenishing valve is connected to an external oil tank, and the other end is connected to one end of the first oil inlet solenoid valve. It is used to replenish oil from the external oil tank when the oil in the waste oil tank is insufficient. The other end of the first oil outlet valve is connected to the first oil inlet solenoid valve, and the other end of the first oil inlet solenoid valve is connected to the primary filter.

8. The integrated oil filtration and storage device according to claim 1, characterized in that, The waste oil tank, the first clean oil tank, and the second clean oil tank are all equipped with cleaning ports, level gauges, breathers, exhaust valves, and oil drain valves. The second clean oil tank is also equipped with a sampling port, a second oil outlet valve, and a second one-way check valve. The sampling port is used for sampling. One end of the second oil outlet valve is connected to the second clean oil tank, and the other end is connected to the second one-way check valve. The second clean oil tank supplies oil to the production line and tooling through the second oil outlet valve and the second one-way check valve.

9. A fully automatic control method for an integrated oil filtration and storage device as described in any one of claims 1-8, characterized in that, The method includes: after the device is powered on, Step S1: Determine whether the state of the second liquid level switch on the first clean oil tank is 1. If yes, execute the oil filtration process; otherwise, execute step S2. Step S2: Within the set time, pour oil from the waste oil tank into the first clean oil tank; obtain the status of the second and third liquid level switches in real time to determine whether the oil filling is complete. If not, determine that the oil replenishment process needs to be executed; if so, start the oil filtration process. Step S3: Start the oil filtration process, filter the oil in the first clean oil tank in the vacuum oil filter, and time the filtration time. Step S4: Obtain the filtration time and determine whether the filtration time exceeds the set running time. If so, stop oil filtration. Step S5: Determine whether the state of the eighth liquid level switch in the second clean oil tank is 1. If yes, continue to wait; if no, determine that the oil filling process needs to be executed. Step S6: Within the set time, inject the oil from the first clean oil tank into the second clean oil tank; obtain the status of the ninth and tenth liquid level switches in real time, and determine whether the oil injection is complete. If so, stop the oil injection.

10. The fully automatic control method according to claim 9, characterized in that, In step S2 above, the oil replenishment process is as follows: determine the state of the fourth liquid level switch on the waste oil tank. If the state of the fourth liquid level switch is 0, the system automatically starts the oil replenishment process, injects the set amount of oil into the waste oil tank, and continues to execute the oil inlet process in the first clean oil tank. In step S2, when the state of the second liquid level switch is 1 and the state of the third liquid level switch is 0, it is determined that the oil filling from the waste oil tank to the first clean oil tank is completed. In step S6, when the state of the ninth liquid level switch is 1 and the state of the tenth liquid level switch is 0, it is determined that the oil filling from the first clean oil tank to the second clean oil tank is completed.

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