Centrifugal pump device with anti-blocking function

Abstract

This invention relates to the field of centrifugal pump technology, specifically disclosing a centrifugal pump device with anti-clogging function, including a waste oil pump chamber, a filter anti-clogging component, and a mixing component. An oil outlet is opened at the bottom of the waste oil pump chamber. The filter anti-clogging component is connected to the right side of the waste oil pump chamber and includes a filter pump body, an anti-clogging filter screen, and a cleaning component, capable of filtering and cleaning the waste oil in the waste oil pump chamber. The mixing component is connected to the right side of the filter pump body and includes a mounting box, a stirring device, a centrifugal pump, and a return pipe. The mixing component can stir the waste oil and new oil. One end of the centrifugal pump is connected to the mixing component, and the other end is connected to the waste oil pump chamber. This invention can sweep and brush the mesh of the anti-clogging filter screen, preventing the mesh from becoming clogged due to the accumulation of impurities, ensuring the filtration effect and speed of the device for waste oil, and enabling the new oil and waste oil to be fully mixed. The mixture then flows back to the waste oil pump chamber through the return pipe, realizing the reuse of waste oil.

Description

Technical Field

[0001] This invention relates to the field of centrifugal pump technology, and in particular to a centrifugal pump device with anti-clogging function. Background Technology

[0002] A centrifugal pump is a pump that uses the centrifugal force generated by the rotation of an impeller to transport liquids. The mechanical seal of a centrifugal pump consists of two main parts: a rotating ring and a stationary ring. The pump seal is a planar seal, which uses two smooth planes to prevent the flow of liquid inside and outside the seal during rotation.

[0003] In the prior art, Chinese Patent CN113107909B discloses an anti-clogging centrifugal pump and method with impeller protection function. It proposes a solution to address the problem of impurities damaging the centrifugal impeller. The solution includes a centrifugal pump with a first conduit fixedly connected to its input end. A cleaning tank is fixedly connected to the left side of the first conduit, and a second conduit is fixedly connected to the left side of the cleaning tank. By using a combination of the centrifugal pump, first conduit, cleaning tank, second conduit, filter, closing mechanism, power box, transmission mechanism, swaying mechanism, inclined ring, third sealing ring, bearing, fixing rod, second fixing block, and tension spring, the problem of existing centrifugal pumps easily sucking in large amounts of impurities during use, causing impurities to impact the impeller surface and damage the impeller, affecting water flow and rendering the centrifugal pump unusable, is solved.

[0004] However, the above solutions still have some shortcomings. For example, in practice, the centrifugal pump filter screen lacks a cleaning and anti-clogging mechanism, which makes the mesh of the centrifugal pump filter screen easily clogged by debris and impurities, thus affecting the effect and speed of subsequent filtration of the transported waste oil. In addition, the above solutions lack a mechanism for mixing the newly transported waste oil, which makes it impossible for the newly added waste oil in the waste oil pump chamber to blend evenly with the old waste oil, and color differences are likely to occur. In view of this, the present invention proposes a centrifugal pump device with anti-clogging function. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to address the shortcomings of the prior art by providing a centrifugal pump device with anti-clogging function. This centrifugal pump device with anti-clogging function can filter and clean waste oil and can mix and reuse new and old oil.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0007] A centrifugal pump device with anti-clogging function includes a waste oil pump chamber, a filter anti-clogging component, and a mixing component. The waste oil pump chamber has a cavity, and an oil outlet extending into the filter anti-clogging component is opened at the bottom of the right side wall. The filter anti-clogging component is connected to the right side of the waste oil pump chamber and includes a filter pump body, an anti-clogging filter screen, and a cleaning component. The filter pump body has a cavity, a sealing plate at the top, and an ink extraction port at the bottom of the right side wall. The anti-clogging filter screen is disposed in the cavity of the filter pump body, dividing the filter pump body into left and right chambers, with the oil outlet extending into the cavity. The left chamber of the filter pump body has a transverse through-hole in the middle of the anti-clogging filter screen. The cleaning assembly includes a rotating rod, a cleaning rod, and brush bristles. The rotating rod is horizontally positioned in the transverse through-hole of the anti-clogging filter screen, with one end of the rotating rod located in the left chamber of the filter pump body. The cleaning rod is connected to the left side of the rotating rod and is perpendicular to it, and has brush bristles. The mixing assembly is connected to the right side of the filter pump body and includes a mounting box, a stirring device, a centrifugal pump, and a return pipe. The mounting box has upper and lower cavities. The mixing chamber has a lower cavity that serves as a transmission chamber. The mixing chamber is cylindrical and connected to the oil supply equipment, with through holes at the center of both its top and bottom. A through hole is also located on the left side wall of the transmission chamber, corresponding to the position of the rotating rod. A stirring device is installed within the mixing chamber, including a mounting rod, stirring blades, a transmission rod, and a motor. The mounting rod is vertically positioned and passes through the through holes at the top and bottom of the mixing chamber. A first bevel gear is located at the top of the mounting rod, and a second bevel gear is located at the bottom. The stirring blades are connected to the side wall of the mounting rod. The transmission rod is horizontally positioned within the transmission chamber, with its left end connected to the rotating rod and its right end equipped with a third bevel gear that meshes with the second bevel gear. The transmission rod is connected to the mounting rod via a transmission connection. The motor is located above the top of the outer wall of the mixing assembly, with its output shaft horizontally positioned. A fourth bevel gear is located at the end of the output shaft, meshing with the first bevel gear. The motor's output shaft is connected to the mounting rod via a transmission connection. A centrifugal pump is connected to the side wall of the mounting box, with one end connected to the ink extraction port via a pipe and the other end connected to the top of the mixing chamber via a pipe.

[0008] Preferably, the anti-clogging filter screen is slidably connected to the filter pump body, and the front and rear sides of the anti-clogging filter screen are provided with mounting strips, and the inner front wall and inner rear wall of the filter pump body are provided with mounting grooves that are adapted to the mounting strips.

[0009] Preferably, a through hole is provided at the top of the rear side wall of the waste oil pump chamber, and a through hole is provided at the bottom of the rear side wall of the mixing chamber. One end of the return pipe is connected to the through hole at the top of the rear side wall of the waste oil pump chamber, and the other end is connected to the through hole at the bottom of the rear side wall of the mixing chamber.

[0010] Preferably, the sealing plate is hinged or detachably connected to the top of the filter pump body.

[0011] Preferably, the number of bristles is several, and the several bristles are evenly and densely distributed on the surface of the cleaning rod, with the end of the bristles away from the cleaning rod overlapping the surface of the anti-clogging filter plate.

[0012] Preferably, the mounting rod has an oil inlet channel inside, a feed pipe is rotatably connected to the top, and oil outlet holes are evenly opened along the longitudinal direction in the part located in the mixing chamber; the feed pipe is connected to the oil supply equipment, and the mounting rod has multiple stirring blades, each stirring blade being located between adjacent oil outlet holes opened on the mounting rod.

[0013] Preferably, the left end of the transmission rod is provided with a connecting protrusion, and the right end of the rotating rod is provided with a connecting groove that matches the connecting protrusion. The transmission rod is engaged with the rotating rod through the connecting protrusion and the connecting groove.

[0014] Preferably, the pipe connected to the bottom of the centrifugal pump extends through the inside of the transmission chamber to the ink extraction port in the filter pump body.

[0015] A method of using a centrifugal pump device with anti-clogging function: The anti-clogging filter component filters impurities: waste oil flows from the outlet of the waste oil pump chamber into the filter pump body; the ink extraction port, under the action of the centrifugal pump, draws the oil out of the filter pump body; under the action of the anti-clogging filter screen and cleaning component, impurities in the oil can be cleaned by the cleaning component without clogging; a stirring device mixes waste oil and new oil: the centrifugal pump draws waste oil from the waste oil pump chamber into the mixing chamber, and new oil is injected into the mixing chamber from the oil supply device; the stirring device mixes the new oil and waste oil together in the mixing chamber; a motor drives the mounting rod to rotate, the rotation of the mounting rod drives the transmission rod to rotate, which in turn drives the cleaning rod to rotate; the oil in the mixing chamber flows to the waste oil pump chamber.

[0016] The present invention has the following beneficial effects:

[0017] Because of the anti-clogging filter component, the mesh of the anti-clogging filter plate is swept and brushed, preventing clogging caused by the accumulation of impurities. This ensures the filtration effect and speed of the device for waste oil. Because of the mixing component, when new oil needs to be added, the oil supply equipment delivers new oil into the oil inlet channel through the supply pipe. The new oil in the oil inlet channel flows into the mixing chamber through the oil outlet. At this time, the rotation of the mounting rod drives the stirring blades to agitate in the mixing chamber, ensuring thorough mixing of the new oil and waste oil. This prevents color differences caused by uneven mixing. Furthermore, the mixed oil can flow back to the waste oil pump chamber through the return pipe, enabling the reuse of waste oil. Attached Figure Description

[0018] Figure 1 This is a front sectional view of a centrifugal pump device with anti-clogging function according to the present invention.

[0019] Figure 2 This is a schematic diagram of the structure of the filter pump body and waste oil pump chamber of the present invention.

[0020] Figure 3 This is a schematic diagram of the structure of the motor of the present invention.

[0021] Figure 4 This is a schematic diagram of the structure of the sealing plate of the present invention.

[0022] Figure 5 This is a schematic diagram of the anti-clogging filter screen of the present invention.

[0023] Figure 6 This is a schematic diagram of the transmission rod of the present invention.

[0024] Figure 7 This is a partially enlarged view of invention A.

[0025] This includes: 1. Waste oil pump chamber; 11. Oil outlet;

[0026] 2. Filter anti-clogging component; 21. Filter pump body; 211. Sealing plate; 212. Ink extraction port;

[0027] 22. Anti-clogging filter screen; 23. Cleaning assembly; 231. Rotating rod; 232. Cleaning rod; 233. Brush bristles;

[0028] 3. Mixing component; 31. Mounting box; 311. Mixing chamber; 312. Transmission chamber;

[0029] 32. Agitator; 321. Mounting rod; 322. Agitator blade; 323. Transmission rod; 324. Motor;

[0030] 33. Centrifugal pump; 34. Return pipeline;

[0031] 41. First bevel gear; 42. Second bevel gear; 43. Third bevel gear; 44. Fourth bevel gear;

[0032] 51. Oil inlet channel; 52. Feed pipe. Detailed Implementation

[0033] The present invention will now be described in further detail with reference to the accompanying drawings and specific preferred embodiments.

[0034] like Figures 1 to 7 As shown, a centrifugal pump device with anti-clogging function includes a waste oil pump chamber 1, a filter anti-clogging component 2, and a mixing component 3.

[0035] Waste oil pump chamber 1 has a cavity, an oil outlet 11 extending into the filter anti-clogging component 2 is opened at the bottom of the right side wall, and a through hole is opened at the top of the rear side wall; the waste oil pump chamber 1 is filled with waste oil.

[0036] The filter anti-clogging component 2 is connected to the right side of the waste oil pump chamber 1, and includes a filter pump body 21, an anti-clogging filter screen 22, and a cleaning component 23.

[0037] The filter pump body 21 has a cavity, a sealing plate 211 on the top, and an ink extraction port 212 on the bottom of the right side wall.

[0038] The anti-clogging filter plate 22 is installed inside the cavity of the filter pump body 21, dividing the filter pump body 21 into left and right chambers. Its longitudinal cross-sectional area is the same as that of the cavity of the filter pump body 21. Gaps are left between the left and right sides of the anti-clogging filter plate 22 and the left and right inner walls of the filter pump body 21 to facilitate the filtration of waste oil entering the cavity of the filter pump body 21 from the oil outlet 11. The oil outlet 11 extends into the left chamber of the filter pump body 21, and a transverse through hole is provided in the middle of the anti-clogging filter plate 22.

[0039] The cleaning component 23 includes a rotating rod 231, a cleaning rod 232, and bristles 233.

[0040] The rotating rod 231 is horizontally positioned in the transverse through-hole of the anti-clogging filter plate 22, with one end of the rotating rod 231 located in the left chamber of the filter pump body 21. The cleaning rod 232 is connected to the left side of the rotating rod 231 and is perpendicular to the rotating rod 231. The cleaning rod 232 is provided with bristles 233. Preferably, there are several bristles 233, which are evenly distributed on the surface of the cleaning rod 232, and the ends of the bristles 233 away from the cleaning rod 232 overlap with the surface of the anti-clogging filter plate 22. The cleaning assembly 23 can clean the anti-clogging filter plate 22 by making a circular motion with the transverse through-hole as the center and the cleaning rod 232 as the radius.

[0041] Preferably, the anti-clogging filter plate 22 is slidably connected to the filter pump body 21. The front and rear sides of the anti-clogging filter plate 22 are provided with mounting strips. The inner front and rear walls of the filter pump body 21 have mounting grooves adapted to the mounting strips. The sealing plate 211 is hinged or detachably connected to the top of the filter pump body 21 to facilitate the removal of the anti-clogging filter plate 22 for cleaning impurities from the bristles 233. Alternatively, the sealing plate 211 can be provided on the front or rear side wall, allowing the anti-clogging filter plate 22 to be pulled out laterally.

[0042] The mixing assembly 3 is connected to the right side of the filter pump body 21 and includes a mounting box 31, a stirring device 32, a centrifugal pump 33, and a return pipe 34.

[0043] The mounting box 31 has two cavities: an upper cavity (mixing cavity 311) and a lower cavity (transmission cavity 312). The mixing cavity 311 is cylindrical, with through holes at the center of its top and bottom, and a through hole at the bottom of its rear side wall. The transmission cavity 312 has a through hole on its left side wall corresponding to the position of the rotating rod 231. Specifically, the through hole is located on the left side wall of the transmission cavity 312 at the same height as the rotating rod 231 and aligned with its longitudinal axis.

[0044] The stirring device 32 is installed in the mixing chamber 311 and includes a mounting rod 321, a stirring blade 322, a transmission rod 323, and a motor 324.

[0045] The mounting rod 321 is vertically positioned and passes through the through holes at the top and bottom of the mixing chamber 311. A sealed bearing is embedded in the through hole at the bottom of the mixing chamber 311, and the inner ring surface of the sealed bearing is fixedly connected to the surface of the mounting rod 321 to prevent oil in the mixing chamber 311 from falling into the transmission chamber 312. The top and bottom of the mounting rod 321 extend out of the mixing chamber 311. A first bevel gear 41 is provided at the top of the mounting rod 321, and a second bevel gear 42 is provided at the bottom of the mounting rod 321. An oil inlet channel 51 is provided inside the mounting rod 321, and a feed pipe 52 is rotatably connected to the top. Oil outlet holes are evenly opened longitudinally along the portion located in the mixing chamber 311. The feed pipe 52 is connected to an oil supply device, and the feed pipe 52 injects new oil into the mixing chamber 311 through the oil inlet channel 51 of the mounting rod 321. A stirring blade 322 is connected to the side wall of a mounting rod 321 located inside the mixing chamber 311. Rotation of the mounting rod 321 drives the stirring blade 322 to agitate within the mixing chamber 311, ensuring thorough mixing of new and waste oil. Preferably, multiple stirring blades 322 are present, each located between adjacent oil outlet holes on the mounting rod 321. A transmission rod 323 is horizontally positioned in the transmission chamber 312 and rotatably connected to a through hole on the left side wall of the transmission chamber 312. Its left end is connected to a rotating rod 231. Preferably, the left end of the transmission rod 323 has a connecting protrusion, and the right end of the rotating rod 231 has a connecting groove that matches the connecting protrusion. The transmission rod 323 engages with the rotating rod 231 through the connecting protrusion and the connecting groove. When cleaning or replacing the anti-clogging filter screen 22, the rotating rod 231 is separated from the transmission rod 323, and the anti-clogging filter screen 22 is removed from the filter pump body 21 via the mounting slide. A third bevel gear 43 is provided at the right end of the transmission rod 323. The third bevel gear 43 meshes with the second bevel gear 42. The transmission rod 323 is connected to the mounting rod 321 in a transmission manner. The motor 324 is located above the top of the outer wall of the mixing component 3. The output shaft of the motor 324 is horizontally positioned. A fourth bevel gear 44 is provided at the end of the output shaft. The fourth bevel gear 44 meshes with the first bevel gear 41. The output shaft of the motor 324 is connected to the mounting rod 321 in a transmission manner.

[0046] Centrifugal pump 33 is connected to the side wall of mounting box 31, preferably fixedly connected to the right side wall of mounting box 31. One end is connected to ink extraction port 212 via a pipe, and the other end is connected to the top interior of mixing chamber 311 via a pipe. Preferably, the pipe connected to the bottom of centrifugal pump 33 extends through the interior of transmission chamber 312 to ink extraction port 212 in filter pump body 21. Centrifugal pump 33 is used to transport the liquid filtered by filter pump body 21 to mixing chamber 311 to mix with new oil.

[0047] One end of the return pipe 34 is connected to the top through hole of the rear side wall of the waste oil pump chamber 1, and the other end is connected to the bottom through hole of the rear side wall of the mixing chamber 311. Preferably, the return pipe 34 is horizontally arranged, but it can also be arranged with the right side higher than the left side, so that the oil in the mixing chamber 311 can enter the waste oil pump chamber 1.

[0048] The method of using a centrifugal pump device with anti-clogging function is as follows:

[0049] The filter anti-clogging component 2 filters impurities: waste oil flows into the filter pump body 21 from the oil outlet 11 of the waste oil pump chamber 1. The ink extraction port 212 draws the oil out of the filter pump body 21 under the action of the centrifugal pump 33. Under the action of the anti-clogging filter screen 22 and the cleaning component 23, the impurities in the oil can be cleaned by the cleaning component 23 without clogging.

[0050] The stirring device 32 stirs the waste oil and the new oil: the centrifugal pump 33 draws the waste oil from the waste oil pump chamber 1 into the mixing chamber 311, and the new oil is injected into the mixing chamber 311 from the oil supply equipment. The stirring device 32 stirs the new oil and waste oil in the mixing chamber 311 together.

[0051] Motor 324 drives mounting rod 321 to rotate, which in turn drives transmission rod 323 to rotate, thereby driving cleaning rod 232 to rotate. Specifically, the fourth bevel gear 44 on the output shaft of motor 324 drives the first bevel gear 41 on mounting rod 321 to rotate. The first bevel gear 41 and the second bevel gear 42 rotate synchronously. The rotation of the second bevel gear 42 drives the third bevel gear 43 on transmission rod 323 to rotate. Transmission rod 323 is connected to rotating rod 231, which drives cleaning rod 232 to rotate. The bristles 233 on cleaning rod 232 brush the mesh of anti-clogging filter plate 22 to prevent the mesh from becoming clogged due to the accumulation of impurities.

[0052] The oil in the mixing chamber 311 flows to the waste oil pump chamber 1. The waste oil mixed in the mixing chamber 311 flows back to the waste oil pump chamber 1 through the return pipe 34, thereby achieving a state of circulating flow of waste oil in the waste oil pump chamber 1.

[0053] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present invention, various equivalent transformations can be made to the technical solutions of the present invention, and these equivalent transformations all fall within the protection scope of the present invention.

Claims

1. A centrifugal pump device with anti-clogging function, characterized in that: It includes a waste oil pump chamber (1), a filter anti-clogging component (2), and a mixing component (3); the waste oil pump chamber (1) has a cavity, and an oil outlet (11) extending into the filter anti-clogging component (2) is provided at the bottom of the right side wall; the filter anti-clogging component (2) is connected to the right side of the waste oil pump chamber (1), and includes a filter pump body (21), an anti-clogging filter screen (22), and a cleaning component (23); the filter pump body (21) has a cavity, a sealing plate (211) is provided at the top, and an ink extraction port (212) is provided at the bottom of the right side wall; the anti-clogging filter screen (22) is set in the cavity of the filter pump body (21), dividing the filter pump body (21) into two chambers, and the oil outlet (11) extends into the left chamber of the filter pump body (21); the anti-clogging... A transverse through hole is provided in the middle of the filter screen plate (22); the cleaning component (23) includes a rotating rod (231), a cleaning rod (232), and bristles (233); the rotating rod (231) is horizontally set in the transverse through hole of the anti-clogging filter screen plate (22), and the left end of the rotating rod (231) is located in the left chamber of the filter pump body (21); the cleaning rod (232) is connected to the left side of the rotating rod (231) and is perpendicular to the rotating rod (231), and the cleaning rod (232) is provided with bristles (233); the mixing component (3) is connected to the right side of the filter pump body (21) and includes a mounting box (31), a stirring device (32), a centrifugal pump (33), and a return pipe (34); the mounting box (31) has two upper and lower parts. The upper cavity of the mounting box (31) is a mixing cavity (311), and the lower cavity is a transmission cavity (312). The mixing cavity (311) is connected to the oil supply equipment, and through holes are opened at the center of its top and bottom. Through holes are opened on the left side wall of the transmission cavity (312) at the position corresponding to the rotating rod (231). The stirring device (32) is set in the mixing cavity (311) and includes a mounting rod (321), a stirring blade (322), a transmission rod (323), and a motor (324). The mounting rod (321) is vertically arranged and passes through the through holes opened at the top and bottom of the mixing cavity (311). A first bevel gear (41) is provided at the top of the mounting rod (321), and a second bevel gear (42) is provided at the bottom of the mounting rod (321). The stirring blade (322) is connected to the side wall of the mounting rod (321). The transmission rod (323) is horizontally arranged in the transmission cavity (312). Its left end is connected to the rotating rod (231). The right end of the transmission rod (323) is provided with a third bevel gear (43). The third bevel gear (43) meshes with the second bevel gear (42). The transmission rod (323) is connected to the mounting rod (321) in a transmission connection. The motor (324) is arranged above the top of the outer wall of the mixing component (3). The output shaft of the motor (324) is horizontally arranged. The end of the output shaft is provided with a fourth bevel gear (44). The fourth bevel gear (44) meshes with the first bevel gear (41). The output shaft of the motor (324) is connected to the mounting rod (321) in a transmission connection.The centrifugal pump (33) is connected to the side wall of the mounting box (31), with one end connected to the ink extraction port (212) via a pipe, and the other end connected to the top of the mixing chamber (311) via a pipe.

2. The centrifugal pump device with anti-clogging function according to claim 1, characterized in that: The anti-clogging filter screen (22) is slidably connected to the filter pump body (21). The front and rear sides of the anti-clogging filter screen (22) are provided with mounting slides. The inner front wall and inner rear wall of the filter pump body (21) are provided with mounting grooves that are compatible with the mounting slides.

3. The centrifugal pump device with anti-clogging function according to claim 1, characterized in that: A through hole is provided at the top of the rear side wall of the waste oil pump chamber (1), and a through hole is provided at the bottom of the rear side wall of the mixing chamber (311). One end of the return pipe (34) is connected to the through hole at the top of the rear side wall of the waste oil pump chamber (1), and the other end is connected to the through hole at the bottom of the rear side wall of the mixing chamber (311).

4. The centrifugal pump device with anti-clogging function according to claim 1, characterized in that: The sealing plate (211) is hinged or detachably connected to the top of the filter pump body (21).

5. The centrifugal pump device with anti-clogging function according to claim 1, characterized in that: The number of bristles (233) is several, and the bristles (233) are evenly and densely distributed on the surface of the cleaning rod (232), and the end of the bristles (233) away from the cleaning rod (232) overlaps with the surface of the anti-clogging filter plate (22).

6. The centrifugal pump device with anti-clogging function according to claim 1, characterized in that: The mounting rod (321) has an oil inlet channel (51) inside and a feed pipe (52) is rotatably connected to the top. The part located in the mixing chamber (311) has oil outlet holes evenly opened along the longitudinal direction. The feed pipe (52) is connected to the oil supply equipment. The mounting rod (321) has multiple stirring blades (322), and each stirring blade (322) is located between adjacent oil outlet holes opened on the mounting rod (321).

7. The centrifugal pump device with anti-clogging function according to claim 1, characterized in that: The left end of the transmission rod (323) is provided with a connecting protrusion, and the right end of the rotating rod (231) is provided with a connecting groove that matches the connecting protrusion. The transmission rod (323) is engaged with the rotating rod (231) through the connecting protrusion and the connecting groove.

8. The centrifugal pump device with anti-clogging function according to claim 1, characterized in that: The pipe connected to the bottom of the centrifugal pump (33) extends through the inside of the transmission chamber (312) to the ink extraction port (212) in the filter pump body (21).

9. A method of using a centrifugal pump device with anti-clogging function as described in claim 1, characterized in that: Filter anti-clogging component (2) filters impurities: Waste oil flows into filter pump body (21) from the oil outlet (11) of waste oil pump chamber (1). The ink extraction port (212) draws the oil out of filter pump body (21) under the action of centrifugal pump (33). Under the action of anti-clogging filter screen (22) and cleaning component (23), impurities in the oil can be cleaned by cleaning component (23) without clogging; Stirring device (32) stirs waste oil and new oil: centrifugal pump (23) Pump (33) draws waste oil from waste oil pump chamber (1) into mixing chamber (311), and new oil is injected into mixing chamber (311) from oil supply equipment. Stirring device (32) stirs the new oil and waste oil in mixing chamber (311) together. Motor (324) drives mounting rod (321) to rotate. The rotation of mounting rod (321) drives transmission rod (323) to rotate, which in turn drives cleaning rod (232) to rotate. Oil in mixing chamber (311) flows to waste oil pump chamber (1).

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