An extraction device and method for distillate oil of waste lubricating oil

Abstract

The present invention discloses an extraction device and method for waste lubricating oil distillate oil, comprising a main body, an inner lower surface of the main body fixedly connected to a discharge pipe, an outer circumferential surface of the discharge pipe is provided with a discharge port, an upper surface of the discharge pipe is rotatably connected to a first rotating rod, a circumferential surface of the first rotating rod is fixedly connected to a plurality of sealing plates, an inner upper surface of the main body is fixedly connected to a filter frame, an inner lower surface of the filter frame is provided with a filter hole layer and a sealing layer, a circumferential surface of the discharge pipe is rotatably connected to a second rotating rod, a circumferential surface of the second rotating rod is fixedly connected to a rotary drum, a circumferential surface of the rotary drum is provided with a plurality of first discharge holes, a lower surface of the rotary drum is provided with a plurality of second discharge holes, a transmission mechanism is provided on the lower surface of the main body, and the first rotating rod drives the rotary drum to rotate synchronously through the transmission mechanism. In the present invention, impurities carried in the waste lubricating oil can be conveniently filtered and the impurities can be automatically cleaned and discharged, effectively avoiding the problem of impurities clogging the filter holes and affecting the subsequent extraction discharge.

Description

Technical Field

[0001] The present invention relates to the technical field of waste lubricating oil treatment, and in particular to a device and method for extracting distillate oil from waste lubricating oil. Background Art

[0002] Lubricating oil is a liquid or semi-solid lubricant used in various types of automobiles and mechanical equipment to reduce friction and protect machinery and processed parts. It mainly plays the role of lubrication, auxiliary cooling, rust prevention, cleaning, sealing and buffering. Synthetic lubricating oil has the characteristics of excellent low-temperature performance, good lubrication performance and long service life. It can be used in environments such as high load, high speed, high vacuum, high-energy radiation and strong oxidizing media.

[0003] After waste lubricating oil is distilled, the resulting distillate still contains a small amount of impurities such as colloid, asphaltene, carbon black, and metal particles. If these impurities are not filtered out, they will seriously affect the quality of the base oil product. However, the current extraction device has the following technical problems when in use: impurities easily clog the filter pores, thereby affecting the discharge of the mixed liquid and causing a decrease in extraction efficiency. Summary of the Invention

[0004] In order to overcome the above technical problems, the purpose of the present invention is to provide a device and method for extracting waste lubricating oil distillate to solve the problem that impurities easily clog the filter holes, thereby affecting the discharge of the mixed liquid and causing a decrease in extraction efficiency.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] A device for extracting distillate oil from waste lubricating oil comprises a main body, an inner lower surface of the main body is fixedly connected to a discharge pipe, an outer circumferential surface of the discharge pipe is provided with a discharge port, an upper surface of the discharge pipe is rotatably connected to a first rotating rod, a circumferential surface of the first rotating rod is fixedly connected to a plurality of sealing plates, an inner upper surface of the main body is fixedly connected to a filter frame, an inner lower surface of the filter frame is provided with a filter layer and a sealing layer, a circumferential surface of the discharge pipe is rotatably connected to a second rotating rod, a circumferential surface of the second rotating rod is fixedly connected to a drum, a circumferential surface of the drum is provided with a plurality of first discharge holes, a lower surface of the drum is provided with a plurality of second discharge holes, a transmission mechanism is provided on the lower surface of the main body, the first rotating rod drives the drum to rotate synchronously through the transmission mechanism, and a circulation mechanism is provided on the lower surface of the main body.

[0007] Furthermore, the upper surfaces of the filter frame and the sealing plate are both in contact with the inner upper surface of the body, the lower surface of the sealing plate is in contact with the inner lower surface of the filter frame, the shape of the filter frame is set to be a truncated cone, and the upper circle radius of the filter frame is larger than the lower circle radius.

[0008] Furthermore, the transmission mechanism includes a motor fixedly connected to the lower surface of the main body, the output end of the motor is fixedly connected to a first gear, the circumferential surface of the second rotating rod is fixedly connected to a second gear, the diameter of the first gear is larger than the radius of the second gear, and the first gear and the second gear are meshed with each other.

[0009] Furthermore, the transmission mechanism also includes a fixed block fixedly connected to the circumferential surface of the main body, the internal rotation of the fixed block is connected to a third rotating rod, one end of the third rotating rod and the output end of the motor are fixedly connected to a first pulley, the other end of the third rotating rod and one end of the first rotating rod are fixedly connected to a second pulley, the first pulleys are connected by a first belt transmission, and the second pulleys are connected by a second belt transmission.

[0010] Furthermore, the circulation mechanism includes a water tank fixedly connected to the lower surface of the main body, a circulation pump fixedly connected to the lower surface of the water tank, an input end of the circulation pump and the interior of the water tank fixedly connected, an output end of the circulation pump fixedly connected to a connecting pipe, and the water tank is made of transparent material.

[0011] Furthermore, a water inlet pipe is provided on the upper surface of the main body, the circumferential surface of the water inlet pipe is fixedly connected to the other end of the connecting pipe, a fixing plate is fixedly connected to the inner lower surface of the main body, a drainage hole is provided inside the fixing plate, one end of the drainage hole is communicated with the interior of the water tank, and the upper surface of the fixing plate is in contact with the lower surface of the drum.

[0012] The water inlet pipe is located directly above the sealing layer, and the discharge port is located on the side away from the water inlet pipe. The discharge port is inclined, and the inclination angle of the inner lower surface of the discharge port is the same as the inclination angle of the inner lower surface of the filter frame. A discharge valve is provided on the lower surface of the body, and the discharge valve is located on the outside of the drum.

[0013] The inner circumference of the body is fixedly connected with a conveying frame, and the conveying frame is located between the drum and the filter frame. The conveying frame is a truncated cone with an upper radius larger than a lower radius. The lower surface of the conveying frame fits the upper surface of the drum.

[0014] A buffer pillar is provided on the lower surface of the body, a spring is fixedly connected inside the buffer pillar, the lower surface of the body is slidably connected to the inside of the buffer pillar, and the lower surface of the body is fixedly connected to the other end of the spring.

[0015] A method for extracting distillate oil from waste lubricating oil comprises the following steps:

[0016] S1: Turn on the circulation pump to extract the light phase liquid from the water tank through the connecting pipe and enter the interior of the water inlet pipe. At the same time, the waste lubricating oil and the light phase liquid are introduced into the interior of the filter frame through the water inlet pipe;

[0017] S2: The sealing plate drives the light phase liquid and the waste lubricating oil to mix inside the filter frame. After the mixing is completed, the mixed liquid can fall into the interior of the conveying frame through the filter layer;

[0018] S3: The sealing plate rotates continuously and drives the impurities filtered out from the filter frame to slide to the discharge port and fall into the discharge pipe and be automatically discharged;

[0019] S4: The mixed liquid falls into the interior of the drum, and the drum rotates at high speed through the transmission mechanism to make the internal mixed liquid undergo centrifugal motion;

[0020] S5: The light phase liquid is located inside the drum and moves to the drain hole to discharge the light phase liquid into the water tank for recycling. The waste lubricating oil is thrown to the outside of the drum by centrifugal force and discharged through the liquid outlet valve for collection.

[0021] Beneficial effects of the present invention:

[0022] 1. When in use, turn on the motor to drive the first gear to rotate, and the first gear and the second gear are engaged to drive the second gear to rotate synchronously. The second rotating rod drives the drum to rotate at high speed. At this time, the motor drives the third rotating rod synchronously through the first pulley and the first belt. The third rotating rod drives the sealing plate synchronously through the second pulley and the second belt. At this time, the waste lubricating oil and the light phase liquid are introduced into the interior of the filter frame. The sealing plate drives the waste lubricating oil and the light phase liquid to move in the sealing layer of the filter frame, so that the waste lubricating oil and the light phase liquid are mixed. When the mixed liquid moves to the filter pore layer, the impurities and the mixed liquid are filtered. The mixed liquid falls into the interior of the conveying frame. At this time, the impurities are driven to the discharge port by the sealing plate. Due to the factor of gravity, the impurities fall into the interior of the discharge pipe and the impurities can be automatically discharged, which is convenient for filtering the impurities carried in the waste lubricating oil and can automatically clean and discharge the impurities, effectively avoiding impurities clogging the filter pores and affecting the subsequent extraction. In addition, the waste lubricating oil and the light phase liquid can be fully mixed before filtration, thereby facilitating the subsequent centrifugal extraction operation and accelerating the extraction efficiency.

[0023] 2. The mixed liquid falls into the inside of the drum through the conveying rack. The high movement of the drum drives the internal mixed liquid to produce centrifugal motion. The light phase liquid is located inside the drum and moves to the drain hole, and the light phase liquid is discharged into the water tank. The circulation pump drives the light phase liquid through the connecting pipe to the inside of the water inlet pipe for continuous recycling. The waste lubricating oil is thrown to the outside of the drum by centrifugal force and discharged and collected through the liquid outlet valve. It is convenient to centrifugal extract and separate the waste lubricating oil and light phase liquid through centrifugal motion. At the same time, the light phase liquid can be recycled, effectively reducing the waste of resources and thus reducing processing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further described below with reference to the accompanying drawings.

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 It is a bottom view of the overall structure of the present invention;

[0027] Figure 3 It is a cross-sectional view of the internal structure of the present invention;

[0028] Figure 4 This is an exploded view of the structure of the drum and the discharge pipe of the present invention;

[0029] Figure 5 It is a top view of the structure of the filter frame of the present invention.

[0030] In the figure: 1. main body; 2. first rotating rod; 3. sealing plate; 4. filter frame; 5. filter hole layer; 6. sealing layer; 7. discharge pipe; 8. discharge port; 9. conveyor frame; 10. motor; 11. first gear; 12. second rotating rod; 13. second gear; 14. rotating drum; 15. first discharge hole; 16. second discharge hole; 17. fixing plate; 18. drainage hole; 19. first pulley; 20. fixing block; 21. third rotating rod; 22. second pulley; 23. water tank; 24. liquid outlet valve; 25. circulation pump; 26. water inlet pipe; 27. connecting pipe; 28. first belt; 29. second belt; 30. buffer pillar. DETAILED DESCRIPTION

[0031] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0032] See also Figure 1-5As shown, a device for extracting distillate oil from waste lubricating oil comprises a main body 1, a discharge pipe 7 is fixedly connected to the inner lower surface of the main body 1, a discharge port 8 is provided on the outer circumferential surface of the discharge pipe 7, a first rotating rod 2 is rotatably connected to the upper surface of the discharge pipe 7, a plurality of sealing plates 3 are fixedly connected to the circumferential surface of the first rotating rod 2, a filter frame 4 is fixedly connected to the inner upper surface of the main body 1, a filter layer 5 and a sealing layer 6 are provided on the inner lower surface of the filter frame 4, a second rotating rod 12 is rotatably connected to the circumferential surface of the discharge pipe 7, a rotary drum 14 is fixedly connected to the circumferential surface of the second rotating rod 12, a plurality of first discharge holes 15 are provided on the circumferential surface of the rotary drum 14, a plurality of second discharge holes 16 are provided on the lower surface of the rotary drum 14, a transmission mechanism is provided on the lower surface of the main body 1, the first rotating rod 2 drives the rotary drum 14 to rotate synchronously through the transmission mechanism, and a circulation mechanism is provided on the lower surface of the main body 1.

[0033] When in use, turn on the circulation pump 2525 to send the light phase liquid into the water inlet pipe 26 through the connecting pipe 27, and then turn on the motor 10 to work. The motor 10 drives the first gear 11 to rotate, and the first gear 11 and the second gear 13 are engaged to drive the second gear to rotate synchronously. The size of the first gear 11 is larger than the size of the second gear 13, so that the second gear 13 can be driven to rotate faster, and the second rotating rod 12 drives the drum 14 to rotate at a high speed. At this time, the motor 10 is transmitted through the first pulley 19 and the first belt 28, so that the third rotating rod 21 rotates synchronously, and the third rotating rod 21 is driven by the first pulley 19 and the first belt 28. The second pulley 22 and the second belt 29 drive, so that the first rotating rod 2 drives the sealing plate 3 to rotate synchronously, the upper surface of the filter frame 4 and the sealing plate 3 are in contact with the inner upper surface of the body 1, and the lower surface of the sealing plate 3 is in contact with the inner lower surface of the filter frame 4. At this time, the waste lubricating oil and the light phase liquid are passed into the interior of the filter frame 4, and the sealing plate 3 drives the waste lubricating oil and the light phase liquid to move in the sealing layer 6 of the filter frame 4, so that the waste lubricating oil and the light phase liquid are mixed. When the mixed liquid moves to the filter pore layer 5, the impurities and the mixed liquid are filtered, and the mixed liquid falls into the interior of the conveying frame 9. At this time, the impurities are removed by the sealing plate 3 is driven to the discharge port 8. Since the shape of the filter frame 4 is set to be a truncated cone and the upper circle radius of the filter frame 4 is larger than the lower circle radius, the impurities automatically fall into the discharge pipe 7 due to the factor of gravity and are discharged. It is convenient to filter the impurities carried by the waste lubricating oil and the impurities can be automatically cleaned and discharged, effectively avoiding the impurities clogging the filter holes and affecting the subsequent extraction. In addition, the waste lubricating oil and the light phase liquid can be fully mixed before filtering, thereby facilitating the subsequent centrifugal extraction operation and accelerating the extraction efficiency. The mixed liquid falls into the interior of the drum 14 through the conveying frame 9. The high movement of the drum 14 drives the internal mixed liquid to produce centrifugal motion. The light phase liquid is located inside the drum 14 and moves to the drain hole 18, and the light phase liquid is discharged into the water tank 23. The circulation pump 2525 drives the light phase liquid to be transported to the inside of the water inlet pipe 26 through the connecting pipe 27 for continued recycling. The waste lubricating oil is thrown to the outside of the drum 14 by centrifugal force and discharged and collected through the liquid outlet valve 24, which facilitates the centrifugal extraction and separation operation of the waste lubricating oil and the light phase liquid through centrifugal motion. At the same time, the light phase liquid can be recycled, effectively reducing the waste of resources and thus reducing processing costs.

[0034] The upper surfaces of the filter frame 4 and the sealing plate 3 are both in contact with the inner upper surface of the body 1, and the lower surface of the sealing plate 3 is in contact with the inner lower surface of the filter frame 4, so that the sealing plate 3 can drive the waste lubricating oil and the light phase liquid to move in the sealing layer 6 of the filter frame 4 and make the waste lubricating oil and the light phase liquid fully mixed. The shape of the filter frame 4 is set to be a truncated cone, and the upper circle radius of the filter frame 4 is larger than the lower circle radius, so that impurities can automatically fall into the bottom of the filter frame 4 by gravity and be driven by the sealing plate 3, so that the sealing plate 3 drives the impurities to move to the inside of the discharge port 8 for automatic discharge.

[0035] The transmission mechanism includes a motor 10 fixedly connected to the lower surface of the body 1, the output end of the motor 10 is fixedly connected to the first gear 11, and the circumferential surface of the second rotating rod 12 is fixedly connected to the second gear 13. The diameter of the first gear 11 is larger than the radius of the second gear 13, and the first gear 11 and the second gear 13 are engaged with each other. The motor 10 can rotate at a high speed to rotate the first gear 11. Since the diameter of the first gear 11 is larger than the radius of the second gear 13, the second gear 13 can be driven to increase the speed, so that the second rotating rod 12 drives the rotating drum 14 to rotate to perform centrifugal extraction and separation operations on the internal mixed liquid.

[0036] The transmission mechanism also includes a fixed block 20 fixedly connected to the circumferential surface of the main body 1, and the internal rotation of the fixed block 20 is connected to the third rotating rod 21, one end of the third rotating rod 21 and the output end of the motor 10 are fixedly connected to the first pulley 19, and the other end of the third rotating rod 21 and one end of the first rotating rod 2 are fixedly connected to the second pulley 22, the first pulleys 19 are connected by a first belt 28, and the second pulleys 22 are connected by a second belt 29, which facilitates the high-speed rotation of the drum 14 while driving the high-speed rotation of the sealing plate 3 on the circumferential surface of the first rotating rod 2, making it convenient to filter the impurities carried in the waste lubricating oil and automatically clean and discharge the impurities, effectively avoiding impurities clogging the filter holes and affecting the subsequent extraction of materials.

[0037] The circulation mechanism includes a water tank 23 fixedly connected to the lower surface of the main body 1, and a circulation pump 25 is fixedly connected to the lower surface of the water tank 23. The input end of the circulation pump 25 is fixedly connected to the interior of the water tank 23, and the output end of the circulation pump 25 is fixedly connected to a connecting pipe 27. The material of the water tank 23 is made of transparent material, which is convenient for subsequent observation of the content of the light phase liquid inside. The circulation pump 25 drives the light phase liquid to be transported to the interior of the water inlet pipe 26 through the connecting pipe 27 for continued circulation. The waste lubricating oil is thrown to the outside of the drum 14 by centrifugal force and discharged and collected through the liquid outlet valve 24, which facilitates the centrifugal extraction and separation operation of the waste lubricating oil and the light phase liquid through centrifugal motion. At the same time, the light phase liquid can also be recycled, effectively reducing the waste of resources and thus reducing processing costs.

[0038] A water inlet pipe 26 is provided on the upper surface of the main body 1, and the circumferential surface of the water inlet pipe 26 is fixedly connected to the other end of the connecting pipe 27. A fixing plate 17 is fixedly connected to the inner lower surface of the main body 1, and a drainage hole 18 is provided inside the fixing plate 17. One end of the drainage hole 18 is communicated with the interior of the water tank 23. The upper surface of the fixing plate 17 is in contact with the lower surface of the drum 14. When the light phase liquid at the bottom of the drum 14 moves centrifugally with the drum 14, when the drainage hole 18 is communicated with the second drainage hole 18 below the drum 14, the light phase liquid can be discharged to the interior of the water tank 23, thereby completing the recycling of the light phase liquid.

[0039] The water inlet pipe 26 is located just above the sealing layer 6, and the discharge port 8 is located on the side away from the water inlet pipe 26, so that the impurities can be automatically discharged after the mixed liquid is fully mixed and filtered through the filter holes. The discharge port 8 is tilted, and the inclination angle of the inner lower surface of the discharge port 8 is the same as the inclination angle of the inner lower surface of the filter frame 4, so that the impurities can automatically fall to the inside of the discharge pipe 7 by gravity for cleaning. A discharge valve is provided on the lower surface of the main body 1, and the position of the discharge valve is on the outside of the drum 14. The waste lubricating oil is thrown to the outside of the drum 14 by centrifugal force, which is convenient for discharging the waste lubricating oil at the extraction site.

[0040] The inner circumferential surface of the main body 1 is fixedly connected to a conveying rack 9, and the position of the conveying rack 9 is between the drum 14 and the filter rack 4. The conveying rack 9 is a truncated cone with an upper circle radius larger than a lower circle radius. The lower surface of the conveying rack 9 fits the upper surface of the drum 14, which facilitates the collection of the mixed liquid and concentrates it inside the drum 14 for centrifugal operation.

[0041] A buffer pillar 30 is provided on the lower surface of the main body 1, and a spring is fixedly connected to the inside of the buffer pillar 30. The lower surface of the main body 1 is slidably connected to the inside of the buffer pillar 30, and the lower surface of the main body 1 is fixedly connected to the other end of the spring, which can buffer the vibration generated by the centrifugal movement of the main body 1, thereby improving the service life of the device.

[0042] A method for extracting distillate oil from waste lubricating oil comprises the following steps:

[0043] S1: Turn on the circulation pump 25 to extract the light phase liquid from the water tank 23 through the connecting pipe 27 and enter the interior of the water inlet pipe 26. At the same time, the waste lubricating oil and the light phase liquid are introduced into the interior of the filter frame 4 through the water inlet pipe 26;

[0044] S2: The sealing plate 3 drives the light phase liquid and the waste lubricating oil to mix inside the filter frame 4. After the mixing is completed, the mixed liquid can fall into the interior of the conveying frame 9 through the filter layer 5;

[0045] S3: The sealing plate 3 rotates continuously and drives the impurities filtered out of the filter frame 4 to slide to the discharge port 8 and fall into the discharge pipe 7 for automatic discharge;

[0046] S4: The mixed liquid falls into the interior of the drum 14, and the drum 14 rotates at high speed through the transmission mechanism to make the internal mixed liquid undergo centrifugal motion;

[0047] S5: The light phase liquid is located inside the drum 14 and moves to the drain hole 18 to be discharged into the water tank 23 for recycling. The waste lubricating oil is thrown to the outside of the drum 14 by centrifugal force and discharged through the liquid outlet valve 24 for collection.

[0048] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0049] The above contents are merely examples and explanations of the present invention. Those skilled in the art may make various modifications or additions to the described specific embodiments or replace them in similar ways. As long as they do not deviate from the invention or exceed the scope defined by the claims, they should all fall within the scope of protection of the present invention.

Claims

1. An extraction device for waste lubricating oil distillate, characterized in that: The invention comprises a main body (1), wherein the inner lower surface of the main body (1) is fixedly connected to a discharge pipe (7), the outer circumferential surface of the discharge pipe (7) is provided with a discharge port (8), the upper surface of the discharge pipe (7) is rotatably connected to a first rotating rod (2), the circumferential surface of the first rotating rod (2) is fixedly connected to a plurality of sealing plates (3), the inner upper surface of the main body (1) is fixedly connected to a filter frame (4), the inner lower surface of the filter frame (4) is provided with a filter pore layer (5) and a sealing layer (6), the discharge pipe The circumferential surface of (7) is rotatably connected to a second rotating rod (12), the circumferential surface of the second rotating rod (12) is fixedly connected to a rotating drum (14), the circumferential surface of the rotating drum (14) is provided with a plurality of first discharge holes (15), the lower surface of the rotating drum (14) is provided with a plurality of second discharge holes (16), the lower surface of the main body (1) is provided with a transmission mechanism, the first rotating rod (2) drives the rotating drum (14) to rotate synchronously through the transmission mechanism, and the lower surface of the main body (1) is provided with a circulation mechanism; The upper surfaces of the filter frame (4) and the sealing plate (3) are both in contact with the inner upper surface of the body (1), and the lower surface of the sealing plate (3) is in contact with the inner lower surface of the filter frame (4). The shape of the filter frame (4) is set to be a truncated cone, and the upper circle radius of the filter frame (4) is larger than the lower circle radius. The upper surface of the body (1) is provided with a water inlet pipe (26), the circumferential surface of the water inlet pipe (26) is fixedly connected to the other end of the connecting pipe (27), the inner lower surface of the body (1) is fixedly connected to a fixing plate (17), the interior of the fixing plate (17) is provided with a drainage hole (18), one end of the drainage hole (18) is communicated with the interior of the water tank (23), and the upper surface of the fixing plate (17) is in contact with the lower surface of the drum (14); The water inlet pipe (26) is located directly above the sealing layer (6), and the discharge port (8) is located on a side away from the water inlet pipe (26). The discharge port (8) is arranged to be inclined, and the inclination angle of the inner lower surface of the discharge port (8) is the same as the inclination angle of the inner lower surface of the filter frame (4). A discharge valve is provided on the lower surface of the body (1), and the discharge valve is located outside the drum (14).

2. The extraction device for waste lubricating oil distillate according to claim 1, characterized in that: The transmission mechanism comprises a motor (10) fixedly connected to the lower surface of the body (1); the output end of the motor (10) is fixedly connected to a first gear (11); the circumferential surface of the second rotating rod (12) is fixedly connected to a second gear (13); the diameter of the first gear (11) is larger than the radius of the second gear (13); and the first gear (11) and the second gear (13) are meshed with each other.

3. The extraction device for waste lubricating oil distillate according to claim 1, characterized in that: The transmission mechanism further comprises a fixed block (20) fixedly connected to the circumferential surface of the body (1); a third rotating rod (21) is rotatably connected inside the fixed block (20); one end of the third rotating rod (21) and the output end of the motor (10) are both fixedly connected to a first pulley (19); the other end of the third rotating rod (21) and one end of the first rotating rod (2) are both fixedly connected to a second pulley (22); the first pulleys (19) are connected to each other via a first belt (28); and the second pulleys (22) are connected to each other via a second belt (29).

4. The extraction device for waste lubricating oil distillate according to claim 1, characterized in that: The circulation mechanism comprises a water tank (23) fixedly connected to the lower surface of the body (1); a circulation pump (25) is fixedly connected to the lower surface of the water tank (23); an input end of the circulation pump (25) is fixedly connected to the interior of the water tank (23); an output end of the circulation pump (25) is fixedly connected to a connecting pipe (27); and the water tank (23) is made of a transparent material.

5. The extraction device for waste lubricating oil distillate according to claim 1, characterized in that: The inner circumferential surface of the body (1) is fixedly connected to a conveying frame (9), and the conveying frame (9) is located between the rotating drum (14) and the filter frame (4). The conveying frame (9) is a truncated cone with an upper circle radius larger than a lower circle radius. The lower surface of the conveying frame (9) is in contact with the upper surface of the rotating drum (14).

6. The device for extracting waste lubricating oil distillate according to claim 1, characterized in that: A buffer pillar (30) is provided on the lower surface of the body (1), a spring is fixedly connected inside the buffer pillar (30), the lower surface of the body (1) and the inside of the buffer pillar (30) are slidably connected, and the lower surface of the body (1) and the other end of the spring are fixedly connected.

7. A method for extracting distillate oil from waste lubricating oil, according to the device according to any one of claims 1 to 6, characterized in that: The following steps are involved: S1: Open the circulation pump (25) to extract the light phase liquid from the water tank (23) through the connecting pipe (27) into the inside of the water inlet pipe (26), while the waste lubricating oil and the light phase liquid are passed through the water inlet pipe (26) into the interior of the filter frame (4); S2: The sealing plate (3) drives the light phase liquid and the waste lubricating oil to mix inside the filter frame (4). After the mixing is completed, the mixed liquid falls into the interior of the conveyor frame (9) through the filter layer (5); S3: The sealing plate (3) continuously rotates and drives the impurities filtered out of the filter frame (4) to slide to the discharge port (8) and fall into the discharge pipe (7) and are automatically discharged; S4: The mixed liquid falls into the interior of the drum (14), at which time the drum (14) rotates at high speed through the transmission mechanism so that the internal mixed liquid performs centrifugal motion; S5: The light phase liquid is located inside the drum (14) and moves to the drum (14) and moves to the drain hole (18) to discharge the light phase liquid into the water tank (23) for recycling. The waste lubricating oil is thrown to the outside of the drum (14) by centrifugal force and discharged through the liquid outlet valve (24) for collection.

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