Base oil pretreatment device

Abstract

The utility model relates to the technical field of base oil treatment, in particular to a base oil pretreatment device. The base oil pretreatment device comprises a skid-mounted seat and a control box arranged on one side of the skid-mounted seat; the buffer tank is mounted at the top end of the skid-mounted seat, and an oil discharge pipe is mounted at the bottom end of the buffer tank; the oil filter assembly used for dewatering and filtering is mounted in the buffer tank; the middle cylinder is mounted on the skid-mounted seat, a centrifugal cylinder is rotationally mounted in the middle cylinder, a switching cover communicated with the oil discharge pipe is mounted at the top end of the centrifugal cylinder, a sealing cover is mounted at the bottom end of the centrifugal cylinder, a water guide pipe fitting and an oil guide pipe fitting are mounted on the sealing cover, and a servo motor used for driving the centrifugal cylinder to rotate is mounted on the middle cylinder; and the servo motor is electrically connected with the control box. The base oil pretreatment device provided by the utility model has the advantage of high dehydration efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of base oil treatment, in particular to a base oil pretreatment device. Background Art

[0002] Lubricating oil is generally composed of two parts: base oil and additives. It is mainly used in various mechanical equipment to play the role of lubrication, auxiliary cooling, rust prevention, cleaning, sealing and buffering. Base oil is the main component of lubricating oil and determines the basic properties of lubricating oil. 300N base oil is a type of base oil. Its viscosity index is between 200N and 350N base oils. It has low volatility, good surface activity, solubility and storage stability. These properties play an important role in its application in lubricating oil production. It is mainly used in the production of high-grade lubricating oil and grease, such as engine oil, hydraulic oil, gear oil, refrigeration oil, etc.

[0003] Base oil pretreatment is an important step in the production process of lubricating oil. Its main purpose is to remove impurities, moisture, acidic substances and salts in the raw oil to improve the quality of the oil and reduce the impact on subsequent processes. According to the characteristics of 300N base oil, the current publication number is CN 214634207. U discloses a base oil pretreatment device, comprising a buffer kettle and a heating kettle, wherein the buffer kettle is provided with a feed inlet, the bottom of the buffer kettle is paved with a water-absorbing material, the buffer kettle and the heating kettle are connected by a pipeline, the feed end of the pipeline is arranged in the middle of the buffer kettle, the discharge end of the pipeline is arranged in the upper part of the heating kettle, a delivery pump is arranged on the pipeline, a heating mechanism is arranged in the cavity of the heating kettle, the heating kettle is also provided with a stirring component and a driving motor for driving the stirring component, an inverted funnel-shaped condensate collecting bucket is arranged on the upper part of the heating kettle, the bottom edge of the condensate collecting bucket is fixed on the inner wall of the heating kettle, the rotating shaft of the stirring component passes through the middle opening of the condensate collecting bucket, and a water outlet pipe connected to the condensate collecting bucket is arranged on the outer wall of the heating kettle; the device is simple and efficient, and can effectively realize the separation of base oil and liquid water. When using this pretreatment device to remove water from 300N base oil with good surface activity and solubility and high oil content, the single static distillation has a general water removal efficiency for 300N base oil.

[0004] Therefore, it is necessary to provide a new base oil pretreatment device to solve the above technical problems. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a base oil pretreatment device with high dehydration efficiency.

[0006] The base oil pretreatment device provided by the utility model comprises: a skid-mounted seat, and a control box arranged on one side of the skid-mounted seat;

[0007] A buffer tank is installed at the top of the skid-mounted seat, an oil inlet pipe is installed on one side of the top of the buffer tank, an oil drain pipe is installed on the bottom of the buffer tank, a control valve is installed on the oil drain pipe, the control valve is electrically connected to the control box, and a drain pipe is installed on one side of the buffer tank;

[0008] An oil filter assembly, the oil filter assembly used for dehydration and filtration is installed in the buffer tank;

[0009] An intermediate cylinder is mounted on the skid-mounted seat, and a centrifugal cylinder is rotatably mounted in the intermediate cylinder. A transfer cover connected to an oil drain pipe is mounted on the top of the centrifugal cylinder, and a sealing cover is mounted on the bottom of the centrifugal cylinder. A water guide pipe and an oil guide pipe are mounted on the sealing cover. A servo motor for driving the centrifugal cylinder to rotate is mounted on the intermediate cylinder, and the servo motor is electrically connected to a control box.

[0010] The first plug-in mechanism is used for plugging and conducting with the water pipe, the first plug-in mechanism is installed on the skid-mounted seat, and is electrically connected to the control box;

[0011] The plug-in mechanism 2 is used for plugging and conducting with the oil-conducting pipe, the plug-in mechanism 2 is installed on the skid-mounted seat, and is electrically connected to the control box;

[0012] A distillation barrel is installed on the skid-mounted seat, and a liquid inlet pipe is provided on the distillation barrel, and the liquid inlet pipe is connected with a drain pipe and a plug-in mechanism;

[0013] The purified oil storage tank is installed on the skid-mounted seat and is connected to the second socket mechanism.

[0014] Preferably, the oil filter assembly includes a sliding rod, which is movably inserted at one end of the buffer tank, and a sealing plate is installed at the end of the sliding rod extending into the buffer tank, the sealing plate is slidably matched with the inner wall of the buffer tank, and a plurality of hydrophilic and oil-repellent films are evenly embedded on the sealing plate, and a limit spring is also sleeved on the end of the sliding rod extending into the buffer tank.

[0015] Preferably, a hydraulic rod is fixedly installed at the other end of the buffer tank, and the telescopic end of the hydraulic rod extends into the buffer tank and is fixedly installed with an oil push plate, and the hydraulic rod is electrically connected to the control box.

[0016] Preferably, the water-conducting pipe comprises a short tube, the short tube is threadedly mounted on the sealing cover, a spring is mounted inside the short tube, a sphere is mounted on the spring, a ball seat which contacts and seals with the sphere is mounted at the bottom end of the short tube, a through hole for plugging in a plug-in mechanism is provided in the middle of the ball seat, and a water-conducting hole which is flush with the bottom of the centrifugal barrel is provided on the short tube.

[0017] Preferably, the socket mechanism includes an electric rod, which is installed on the skid-mounted seat and electrically connected to the control box, and a connecting elbow is fixedly installed on the telescopic end of the electric rod, one end of the connecting elbow is movably connected to the liquid inlet pipe, and a thimble is installed on the other end of the connecting elbow, the thimble is plugged into and cooperated with a through hole opened in a ball seat, and a through hole for connecting with a short tube is opened at the top of the thimble.

[0018] Preferably, the oil guide pipe comprises a long tube, the long tube is threadedly mounted on the sealing cover, and a spring 2 is installed in the long tube, a sphere 2 is installed on the spring 2, a ball seat 2 which is in contact and sealed with the sphere 2 is installed in the long tube, a through hole for plugging in the plug-in mechanism 2 is provided in the middle of the ball seat 2, an oil guide hole is provided on one side of the top end of the long tube, a CCD camera is installed on the intermediate cylinder, the CCD camera is flush with the oil guide hole and is electrically connected to the control box, and the centrifugal cylinder is transparent.

[0019] Preferably, the second socket strip mechanism includes a support plate, which is fixedly mounted on the skid-mounted seat, and an electric rod is mounted on the support plate, the electric rod is electrically connected to a control box, and a connecting elbow is fixedly mounted on the telescopic end of the second electric rod, one end of the connecting elbow is movably connected to the purified oil storage tank, and a second ejector tube is mounted on the other end of the connecting elbow, the second ejector tube is plugged into and matched with a through hole provided in the second ball seat, and a through hole for connecting with the long tube is provided at the top of the second ejector tube.

[0020] Compared with the related art, the base oil pretreatment device provided by the utility model has the following beneficial effects:

[0021] 1. The utility model provides a base oil pretreatment device, which provides an oil filter assembly in a buffer tank, and uses a hydrophilic and oleophobic membrane to preliminarily separate the water contained in the base oil when the base oil is statically buffered. Then, the preliminarily separated oil is poured into a centrifugal drum for high-speed rotation, and the oil and water are centrifugally separated to obtain high-quality base oil;

[0022] 2. The water from the preliminary oil filtration and the water from the centrifugal separation are reintroduced into the distillation barrel for distillation operation, and the trace base oil contained in the water is extracted again, thereby avoiding the waste of base oil and achieving efficient pretreatment of base oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A structural schematic diagram of a preferred embodiment of the base oil pretreatment device provided by the utility model;

[0024] Figure 2 A structural schematic diagram of the base oil pretreatment device provided by the utility model from another perspective;

[0025] Figure 3 A schematic diagram of the cross-section structure of the base oil pretreatment device provided by the utility model;

[0026] Figure 4 This is a schematic diagram of the structure in which an oil filter assembly is installed in the buffer tank provided by the utility model;

[0027] Figure 5 A schematic diagram of the structure of a centrifugal cylinder provided by the utility model having a water guide pipe and an oil guide pipe installed thereon;

[0028] Figure 6 for Figure 5 A partial enlarged view of A shown.

[0029] Numbers in the figure: 1. Skid-mounted seat; 2. Buffer tank; 21. Oil inlet pipe; 22. Oil discharge pipe; 23. Control valve; 24. Drain pipe; 3. Oil filter assembly; 31. Sliding rod; 32. Sealing plate; 33. Hydrophilic and oleophobic membrane; 34. Limit spring; 35. Hydraulic rod; 36. Oil push plate; 4. Intermediate cylinder; 41. Centrifugal cylinder; 42. Adapter cover; 43. Sealing cover; 44. Water guide pipe; 441. Short pipe; 442. Spring 1; 443. Ball 1; 444. Ball seat 1; 401. Water guide hole; 45, oil guide pipe; 451, long pipe; 452, spring 2; 453, sphere 2; 454, ball seat 2; 402, oil guide hole; 46, servo motor; 47, CCD camera; 5, plug strip mechanism 1; 51, electric rod 1; 52, connecting elbow 1; 53, ejector tube 1; 6, plug strip mechanism 2; 61, support plate; 62, electric rod 2; 63, connecting elbow 2; 64, ejector tube 2; 7, distillation barrel; 71, liquid inlet pipe; 8, purified oil storage tank; 9, control box. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0031] The specific implementation of the present utility model is described in detail below in conjunction with specific embodiments.

[0032] See also Figures 1 to 6 The present invention provides a base oil pretreatment device, the base oil pretreatment device comprising:

[0033] A skid-mounted seat 1, and a control box 9 arranged on one side of the skid-mounted seat 1;

[0034] A buffer tank 2 is installed at the top of the skid-mounted seat 1. An oil inlet pipe 21 is installed on one side of the top of the buffer tank 2. An oil drain pipe 22 is installed on the bottom of the buffer tank 2. A control valve 23 is installed on the oil drain pipe 22. The control valve 23 is electrically connected to the control box 9. A drain pipe 24 is installed on one side of the buffer tank 2.

[0035] An oil filter assembly 3, the oil filter assembly 3 for dehydration and filtration is installed in the buffer tank 2;

[0036] The intermediate cylinder 4 is mounted on the skid-mounted seat 1, and a centrifugal cylinder 41 is rotatably mounted in the intermediate cylinder 4. A transfer cover 42 connected to the oil drain pipe 22 is mounted on the top of the centrifugal cylinder 41, and a sealing cover 43 is mounted on the bottom of the centrifugal cylinder 41. A water guide pipe 44 and an oil guide pipe 45 are mounted on the sealing cover 43. A servo motor 46 for driving the centrifugal cylinder 41 to rotate is mounted on the intermediate cylinder 4, and the servo motor 46 is electrically connected to the control box 9;

[0037] The plug-in mechanism 5 is used for plugging and conducting with the water pipe 44. The plug-in mechanism 5 is installed on the skid-mounted seat 1 and is electrically connected to the control box 9;

[0038] The plug-in mechanism 2 6 is used for plugging and conducting with the oil guide pipe 45. The plug-in mechanism 2 6 is installed on the skid-mounted seat 1 and is electrically connected to the control box 9;

[0039] A distillation barrel 7 is installed on the skid-mounted seat 1, and a liquid inlet pipe 71 is provided on the distillation barrel 7, and the liquid inlet pipe 71 is connected to the drain pipe 24 and the plug-in mechanism 5;

[0040] The purified oil storage tank 8 is installed on the skid-mounted seat 1 and is connected to the second plug-in mechanism 6.

[0041] It should be noted that: when in use, 300N base oil is introduced into the buffer tank 2 through the oil inlet pipe 21. After the 300N base oil is introduced into the buffer tank 2, the oil and water are initially separated by filtering through the oil filter assembly 3. The separated water is introduced into the distillation barrel 7 through the drain pipe 24. The separated oil opens the control valve 23 through the control box 9, thereby introducing the oil into the centrifugal cylinder 41 through the oil drain pipe. After the introduction, the control valve 23 is closed and the servo motor 46 is started to drive the centrifugal cylinder 41 to rotate at a high speed through the gear transmission, thereby centrifugally dehydrating the oil in the centrifugal cylinder 41. After the oil and water are separated, the water is introduced into the distillation barrel 7 through the water guide pipe 44 using the plug-in mechanism 5, the separated water is distilled, and the trace base oil contained in the water is recovered, thereby avoiding the waste of the base oil. The base oil after centrifugal separation is introduced into the purified oil storage tank 8 through the cooperation of the oil guide pipe 45 and the plug-in mechanism 6, thereby completing the efficient pretreatment of the base oil.

[0042] In the embodiments of the present invention, please refer to Figure 1 and Figure 4 The oil filter assembly 3 includes a slide rod 31, which is movably inserted at one end of the buffer tank 2, and a sealing plate 32 is installed at the end of the slide rod 31 extending into the buffer tank 2, and the sealing plate 32 is slidably matched with the inner wall of the buffer tank 2, and a plurality of hydrophilic and oleophobic films 33 are evenly embedded on the sealing plate 32, and a limit spring 34 is also sleeved at the end of the slide rod 31 extending into the buffer tank 2;

[0043] It should be noted that: when the oil filter assembly 3 is in use, as the base oil is introduced from the oil inlet pipe 21 into the buffer tank 2, the oil pushes the sealing plate 32 and the slide rod 31 to slide backward, and the oil continues to increase and continuously pushes the sealing plate 32 to move until the limit spring 34 contacts the inner wall of one end of the buffer tank 2, and the internal oil squeezes the hydrophilic oleophobic membrane 33, and the water is introduced from the hydrophilic oleophobic membrane 33 into one side of the sealing plate 32, and from the drain pipe 24 into the liquid inlet pipe 71, and then into the distillation barrel 7, and the dehydrated oil stays on the other side of the sealing plate 32 to achieve oil-water separation;

[0044] In the present embodiment, a hydraulic rod 35 is fixedly installed at the other end of the buffer tank 2, and an oil push plate 36 is fixedly installed at the telescopic end of the hydraulic rod 35 extending into the buffer tank 2. The hydraulic rod 35 is electrically connected to the control box 9. In this way, after the oil and water are separated, when the oil needs to be discharged into the centrifugal cylinder 41 through the oil drain pipe 22, the hydraulic rod 35 is started to drive the oil push plate 36 to slide in the buffer tank 2, thereby accelerating the introduction of the oil from the oil drain pipe 22 into the centrifugal cylinder 41.

[0045] In the embodiments of the present invention, please refer to Figures 1 to 6 The water guide pipe 44 includes a short pipe 441, which is threadedly installed on the sealing cover 43, and a spring 442 is installed in the short pipe 441, a ball 443 is installed on the spring 442, a ball seat 444 in contact and sealing with the ball 443 is installed at the bottom of the short pipe 441, a through hole for plugging in the plug-in mechanism 5 is opened in the middle of the ball seat 444, and a water guide hole 401 flush with the bottom of the centrifugal cylinder 41 is opened on the short pipe 441.

[0046] The socket mechanism 5 includes an electric rod 51, which is installed on the skid-mounted seat 1 and electrically connected to the control box 9, and a connecting elbow 52 is fixedly installed at the telescopic end of the electric rod 51, one end of the connecting elbow 52 is movably plugged with the liquid inlet pipe 71, and a thimble tube 53 is installed at the other end of the connecting elbow 52, ​​and the thimble tube 53 is plugged into the through hole opened in the ball seat 444, and a through hole for communicating with the short tube 441 is opened at the top of the thimble tube 53.

[0047] It should be noted that when the water guide pipe 44 is in use, after the centrifugal cylinder 41 rotates at high speed, the oil and water are separated, and the heavier water remains at the bottom of the centrifugal cylinder 41, and then the electric rod 51 is controlled to push the connecting elbow pipe 52 to drive the ejector pipe 53 to be inserted into the short tube 441, until the ejector pipe 53 pushes the ball 443 off the ball seat 444, thereby connecting the short tube 441, so that the water at the bottom of the centrifugal cylinder 41 flows into the short tube 441 through the water guide hole 401, and then the water is introduced into the liquid inlet pipe 71 through the connecting elbow pipe 52, and then flows into the distillation barrel 7, and the base oil is extracted from the centrifuged water. After the water is discharged, the electric rod 51 is controlled to contract, and the ejector pipe 53 withdraws from the short tube 441. After withdrawing, the ball 443 is driven down by the spring 442 to press on the ball seat 444 again, and the short tube 441 is sealed, which is convenient for centrifugal dehydration again in the later stage.

[0048] In the embodiments of the present invention, please refer to Figure 1 and Figure 4 The oil guide pipe 45 includes a long tube 451, which is threadedly installed on the sealing cover 43, and a spring 452 is installed in the long tube 451, a ball 453 is installed on the spring 452, a ball seat 454 is installed in the long tube 451 to contact and seal with the ball 453, a through hole for the insertion of the plug-in mechanism 6 is opened in the middle of the ball seat 454, an oil guide hole 402 is opened on one side of the top of the long tube 451, a CCD camera 47 is installed on the intermediate cylinder 4, the CCD camera 47 is flush with the oil guide hole 402 and is electrically connected to the control box 9, and the centrifugal cylinder 41 is transparent.

[0049] The socket mechanism 2 6 includes a support plate 61, which is fixedly mounted on the skid mount 1, and an electric rod 2 62 is mounted on the support plate 61, the electric rod 2 62 is electrically connected to the control box 9, and a connecting elbow 2 63 is fixedly mounted on the telescopic end of the electric rod 2 62, one end of the connecting elbow 2 63 is movably plugged into the purified oil storage tank 8, and a thimble tube 2 64 is mounted on the other end of the connecting elbow 63, the thimble tube 2 64 is plugged into and matched with the through hole provided in the ball seat 2 454, and a through hole for communicating with the long tube 451 is provided at the top of the thimble tube 64.

[0050] It should be noted that: after the centrifugal cylinder 41 rotates at high speed, when oil needs to be discharged, the second electric rod 62 is controlled to contract, thereby driving the second connecting elbow 63 to rise, inserting the second ejector tube 64 into the long tube 451, until the second ball 453 is lifted from the second ball seat 454, and the long tube 451 is opened, so that the oil in the centrifugal cylinder 41 is introduced into the purified oil storage tank 8 through the oil guide hole 402, the long tube 451, the second ejector tube 64 and the second connecting elbow 63, so as to realize the pretreatment storage of the base oil. After the oil is guided, the second electric rod 62 is controlled to extend, driving the ejector tube 64 to push the second ball 453 upward. The second ball 453 is withdrawn from the long tube 451, and the second ball 453 is pressed onto the second ball seat 454 under the action of the second spring 452, so as to complete the sealing of the long tube 451. The oil layer at the oil guide hole 402 is monitored by setting a CCD camera 47. When the water level in the centrifugal cylinder 41 after centrifugal separation is much lower than the oil guide hole 402, only the oil guide pipe 45 is opened to drain the oil after a single centrifugal separation. When the water level is about to reach the oil guide hole 402, the water guide pipe 44 is opened to drain the water, so as to realize the separate discharge of oil and water after the separation of the base oil.

[0051] The working principle of the base oil pretreatment device provided by the utility model is as follows:

[0052] During use, 300N base oil is introduced into the buffer tank 2 through the oil inlet pipe 21. 300N base oil is introduced into the buffer tank 2. As the base oil is introduced into the buffer tank 2 from the oil inlet pipe 21, the oil pushes the sealing plate 32 and the slide rod 31 to slide backwards. The oil is continuously increased and continuously pushes the sealing plate 32 to move until the limit spring 34 contacts the inner wall at one end of the buffer tank 2. The internal oil squeezes the hydrophilic and oleophobic membrane 33. The water is introduced from the hydrophilic and oleophobic membrane 33 into one side of the sealing plate 32, and is introduced from the drain pipe 24 into the liquid inlet pipe 71, and then introduced into the distillation barrel 7. The dehydrated oil stays on the other side of the sealing plate 32 to achieve oil-water separation. After the oil-water separation, when the oil needs to be discharged into the centrifugal cylinder 41 through the oil drain pipe 22, the control valve 23 is opened, and the hydraulic rod 35 is started to drive the oil push plate 36 to slide in the buffer tank 2. The fast oil is introduced into the centrifugal cylinder 41 from the oil drain pipe 22. After the introduction, the control valve 23 is closed and the servo motor 46 is started to drive the centrifugal cylinder 41 to rotate at a high speed through the gear transmission, so as to centrifugally dehydrate the oil in the centrifugal cylinder 41. After centrifugal separation, the oil layer at the oil guide hole 402 is monitored by the CCD camera 47. When the water level in the centrifugal cylinder 41 after centrifugal separation is much lower than the oil guide hole 402, only the oil guide pipe 45 is opened to drain the oil after a single centrifugal separation. The oil guide pipe 45 uses the plug-in mechanism 2 6 to pour the oil into the purified oil storage tank 8. When the water level is about to reach the oil guide hole 402, the plug-in mechanism 1 5 is used to open the water guide pipe 44 for drainage, and the water is introduced into the distillation barrel 7 through the liquid inlet pipe 71 for secondary oil extraction, thereby realizing the separate discharge of oil and water after the base oil separation, and realizing efficient pretreatment.

[0053] The circuits and controls involved in the present invention are all prior art and will not be described in detail here.

[0054] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A base oil pretreatment device, comprising: A skid-mounted seat (1), and a control box (9) arranged on one side of the skid-mounted seat (1); It is characterized by further comprising: A buffer tank (2) is mounted on the top of the skid-mounted seat (1), an oil inlet pipe (21) is mounted on one side of the top of the buffer tank (2), an oil drain pipe (22) is mounted on the bottom of the buffer tank (2), a control valve (23) is mounted on the oil drain pipe (22), the control valve (23) is electrically connected to the control box (9), and a drain pipe (24) is mounted on one side of the buffer tank (2); An oil filter assembly (3), the oil filter assembly (3) used for dehydration and filtration being installed in the buffer tank (2); An intermediate cylinder (4) is mounted on the skid-mounted seat (1), and a centrifugal cylinder (41) is rotatably mounted in the intermediate cylinder (4), a transfer cover (42) connected to an oil drain pipe (22) is mounted on the top of the centrifugal cylinder (41), a sealing cover (43) is mounted on the bottom of the centrifugal cylinder (41), a water guide pipe (44) and an oil guide pipe (45) are mounted on the sealing cover (43), a servo motor (46) for driving the centrifugal cylinder (41) to rotate is mounted on the intermediate cylinder (4), and the servo motor (46) is electrically connected to a control box (9); A plug-in mechanism (5) for plugging and conducting with the water pipe (44), the plug-in mechanism (5) being installed on the skid-mounted seat (1) and electrically connected to the control box (9); The second plug-in mechanism (6) is used for plugging and conducting with the oil guide pipe (45), the second plug-in mechanism (6) is installed on the skid-mounted seat (1), and is electrically connected to the control box (9); A distillation barrel (7) is mounted on the skid-mounted seat (1), and a liquid inlet pipe (71) is provided on the distillation barrel (7), wherein the liquid inlet pipe (71) is connected to a drain pipe (24) and a drain plug mechanism (5); The purified oil storage tank (8) is mounted on the skid-mounted seat (1) and is connected to the second plug-in mechanism (6).

2. The base oil pretreatment device according to claim 1, characterized in that: The oil filter assembly (3) comprises a sliding rod (31), the sliding rod (31) being movably inserted into one end of the buffer tank (2), and a sealing plate (32) being installed at the end of the sliding rod (31) extending into the buffer tank (2), the sealing plate (32) being slidably matched with the inner wall of the buffer tank (2), and a plurality of hydrophilic and oleophobic films (33) being evenly embedded on the sealing plate (32), and a limit spring (34) being sleeved at the end of the sliding rod (31) extending into the buffer tank (2).

3. The base oil pretreatment device according to claim 1, characterized in that: A hydraulic rod (35) is fixedly mounted on the other end of the buffer tank (2); the telescopic end of the hydraulic rod (35) extends into the buffer tank (2) and is fixedly mounted with an oil push plate (36); the hydraulic rod (35) is electrically connected to a control box (9).

4. The base oil pretreatment device according to claim 1, characterized in that: The water guide pipe (44) comprises a short pipe (441), the short pipe (441) being threadedly mounted on the sealing cover (43), a spring (442) being mounted inside the short pipe (441), a ball (443) being mounted on the spring (442), a ball seat (444) being mounted at the bottom end of the short pipe (441) and being in contact and sealing with the ball (443), a through hole for plugging in a plug-in mechanism (5) being provided in the middle of the ball seat (444), and a water guide hole (401) being flush with the bottom of the centrifugal cylinder (41) being provided on the short pipe (441).

5. The base oil pretreatment device according to claim 4, characterized in that: The plug strip mechanism (5) comprises an electric rod (51), the electric rod (51) being mounted on the skid-mounted seat (1) and electrically connected to the control box (9), and a connecting elbow (52) being fixedly mounted on the telescopic end of the electric rod (51), one end of the connecting elbow (52) being movably plugged into the liquid inlet pipe (71), and a thimble tube (53) being mounted on the other end of the connecting elbow (52), the thimble tube (53) being plugged into and matched with a through hole provided in the ball seat (444), and a through hole for communicating with the short tube (441) being provided at the top end of the thimble tube (53).

6. The base oil pretreatment device according to claim 1, characterized in that: The oil guide pipe member (45) comprises a long tube (451), the long tube (451) being threadedly mounted on the sealing cover (43), and a second spring (452) being mounted in the long tube (451), a second ball (453) being mounted on the second spring (452), a second ball seat (454) being mounted in the long tube (451) and being in contact and sealing with the second ball (453), a through hole for plugging in a second plug-in mechanism (6) being provided in the middle of the second ball seat (454), an oil guide hole (402) being provided on one side of the top end of the long tube (451), a CCD camera (47) being mounted on the intermediate cylinder (4), the CCD camera (47) being flush with the oil guide hole (402) and being electrically connected to the control box (9), and the centrifugal cylinder (41) being transparent.

7. The base oil pretreatment device according to claim 6, characterized in that: The second plug strip mechanism (6) comprises a support plate (61), the support plate (61) being fixedly mounted on the skid mount (1), and the support plate (61) being mounted with a second electric rod (62), the second electric rod (62) being electrically connected to the control box (9), and a second connecting elbow (63) being fixedly mounted on the telescopic end of the second electric rod (62), one end of the second connecting elbow (63) being movably plugged into the purified oil storage tank (8), and a second ejector tube (64) being mounted on the other end of the second connecting elbow (63), the second ejector tube (64) being plugged into and matched with a through hole provided in the second ball seat (454), and a through hole for communicating with the long tube (451) being provided at the top end of the second ejector tube (64).

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