Oil filter with high filtering precision

Abstract

The invention discloses an engine oil filter with high filtering precision, and belongs to the technical field of engine oil filters, the engine oil filter comprises a shell mounted on a vehicle engine oil delivery system, a mounting cover is fixedly mounted at the upper end of the shell in a sealing manner, and meanwhile, a filter element is mounted on the inner side of the shell; a fixed center pipe is fixedly installed on the inner side of a frame body on the upper portion of the filter element, a built-in movable sliding ring is movably installed on the inner side of the fixed center pipe, sealing membranes are evenly and fixedly installed on the inner side of the built-in movable sliding ring, an adjusting sliding base is slidably arranged on the inner wall of the shell, and a cleaning assembly is installed on the inner side of the adjusting sliding base; and a rotating seat is rotationally mounted on the inner wall of the lower part of the shell, and an elastic rubber pipe is connected between the adjusting sliding seat and the rotating seat. According to the oil filter with the high filtering precision, the filter element can be automatically cleaned in multiple modes in the using process, the filter element is effectively prevented from being blocked, the filtering precision is effectively improved, impurities obtained after cleaning can be automatically collected, and follow-up cleaning is facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of oil filters, and specifically to an oil filter with high filtration accuracy. Background Art

[0002] During the operation of an automobile engine, engine oil circulates to lubricate various components, reducing friction and wear. However, during use, engine oil will inevitably mix with various impurities, such as metal debris, dust, carbon deposits, and gums generated by the oxidation of the engine oil itself. If these impurities are not filtered and removed in a timely manner, it will lead to a decline in engine performance, a reduction in power, an increase in fuel consumption, and may even cause engine failures, seriously affecting the reliability and safety of the automobile. Therefore, an oil filter is an essential component in the lubrication system of an automobile engine.

[0003] The prior art (Chinese Patent with application number: 202420308353.7, and the application date of February 20, 2024) discloses a pressure-stabilizing oil filter, which relates to the technical field of oil filters. The present utility model includes a housing, a placement seat is fixedly connected to the lower inner wall of the housing, a filter element assembly is movably arranged at the top of the placement seat, a check valve is arranged in the middle of the top of the filter element assembly, and a chassis is movably arranged at the top of the check valve. A cleaning mechanism is jointly arranged between the inner wall of the housing and one side of the top of the placement seat. The cleaning mechanism includes a protective box, one end of the protective box is fixedly connected to the inner wall of the housing, a motor is arranged on the lower inner wall of the protective box, and the output end of the motor penetrates through the lower inner wall of the protective box and is fixedly connected to a threaded rod. By setting the cleaning mechanism, the stability of the pressure in the filter is enhanced, the filter paper is conveniently cleaned, and the service life of the oil filter is increased. By setting the filter element assembly, it plays a role in conveniently filtering out mechanical impurities and gums in the engine oil, improving the use effect of the oil filter; The prior art (Chinese Patent with application number: 202011020157.2, and the application date of September 25, 2020) discloses an automobile oil filter, including a housing, a dirty oil inlet, a central tube, and a filter element. The inner surface of the housing is divided into a hot filtration area and a clogging filtration area from top to bottom by a partition plate. The central tube penetrates through the partition plate and extends to a position close to the bottom of the inner surface of the housing. Filter elements are sleeved on the outer surface of the central tube above and below the partition plate. A check valve is arranged at the position between the outer surface of the partition plate and the inner surface of the housing outside the filter element. An automatic cleaning device is arranged at the position of the filter element on the inner wall of the housing. The automatic cleaning device includes fixed feet arranged at circumferential intervals along the inner wall of the housing. A brush body rod is arranged on the side of the fixed foot close to the filter element, and a cleaning brush is arranged at one end of the brush body rod close to the filter element; When the engine oil enters the hot filtration area, it will impact the cleaning brush and drive it to swing, thereby cleaning the outer surface of the filter element to improve its service life; Although existing engine oil filters can achieve automatic cleaning of engine oil, most of them adopt a single brush cleaning method, resulting in limited cleaning effect and inconvenient automatic collection of impurities removed during cleaning. As a result, impurities will adhere to the outer side of the filter element again during subsequent use, increasing the risk of filter element blockage and having certain defects in use. Summary of the Invention

[0004] The purpose of the present invention is to provide an engine oil filter with high filtration accuracy to solve the problem proposed in the above background technology that although existing engine oil filters on the market can achieve automatic cleaning of engine oil, most of them adopt a single brush cleaning method, resulting in limited cleaning effect and inconvenient automatic collection of impurities removed during cleaning. As a result, impurities will adhere to the outer side of the filter element again during subsequent use, increasing the risk of filter element blockage.

[0005] To achieve the above purpose, the present invention provides the following technical solution: An engine oil filter with high filtration accuracy includes a housing installed on the vehicle engine oil delivery system. An installation cover is sealed and fixedly installed at the upper end of the housing, and an oil inlet hole is opened on the installation cover. A drain pipe penetrates through the center position of the installation cover. At the same time, a filter element is installed inside the housing. A fixed central pipe is fixedly installed inside the upper part of the frame of the filter element. An internal movable sliding ring is movably installed inside the fixed central pipe. Sealing diaphragms are evenly fixedly installed inside the internal movable sliding ring. An adjusting sliding seat is slidably arranged on the inner wall of the housing. A cleaning component is installed inside the adjusting sliding seat. A rotating seat is rotatably installed on the lower inner wall of the housing. At the same time, an elastic rubber tube is connected between the adjusting sliding seat and the rotating seat. And a suction pipe is fixedly installed on the rotating seat.

[0006] Preferably, the oil inlet holes are evenly opened on the installation cover, and the oil inlet holes are distributed outside the drain pipe. The drain pipe and the housing are coaxially arranged. At the same time, a check diaphragm is also installed between the upper end of the installation cover and the filter element. The check diaphragm is funnel-shaped. The upper part of the check diaphragm fits against the lower surface of the installation cover and covers the oil inlet holes. The lower part of the check diaphragm is hermetically butt-jointed with the upper end pipe orifice of the filter element. A spring is connected between the lower end of the filter element and the lower inner wall of the housing.

[0007] Preferably, the fixed central pipe is fixedly installed on the inner wall of the upper end of the filter element. The fixed central pipe is connected and communicated with the lower ends of the drain pipe and the check diaphragm. And the fixed central pipe and the filter element are coaxially arranged.

[0008] Preferably, the outer wall of the built-in movable slip ring fits against the inner wall of the fixed central tube, and the fixed central tube and the built-in movable slip ring are coaxially arranged. A plurality of sealing diaphragms inside the built-in movable slip ring are mutually attached to achieve sealing inside the built-in movable slip ring. Meanwhile, the built-in movable slip ring slides upward along the inner wall of the fixed central tube under the action of hydraulic pressure.

[0009] Preferably, a plurality of limiting frames are evenly and fixedly installed on the inner wall of the built-in movable slip ring, and the limiting frames are attached to the splicing positions of two adjacent sealing diaphragms to prevent the sealing diaphragms from deforming and flipping downward. Moreover, the limiting frames are located below the sealing diaphragms.

[0010] Preferably, a pull rope is fixedly connected to the lower surface of the built-in movable slip ring, and the end of the pull rope far from the built-in movable slip ring is fixedly connected to the adjusting sliding seat. During the upward movement of the built-in movable slip ring, the adjusting sliding seat is pulled by the pull rope to slide upward synchronously inside the housing. Guide blocks for limiting the adjusting sliding seat are evenly arranged on the inner wall of the housing.

[0011] Preferably, the cleaning assembly fixedly installed inside the adjusting sliding seat includes a plurality of cleaning blades, and the cleaning blades are attached to the outer wall of the filter element. The adjusting sliding seat drives the cleaning blades to perform synchronous lifting adjustment to scrape and clean the outer wall of the filter element. Meanwhile, the upper surface of the cleaning blades is inclined.

[0012] Preferably, the rotating seat and the housing are elastically rotatably connected, and the elastic rubber tube is in a twisted state in the initial state. During the upward movement of the adjusting sliding seat, the elastic rubber tube is pulled to return to a flat state. Meanwhile, during the upward movement of the adjusting sliding seat, the rotating seat is elastically rotated by pulling the elastic rubber tube.

[0013] Preferably, drain pipes are evenly and fixedly installed on the adjusting sliding seat, and extraction pipes are evenly and fixedly installed on the rotating seat. The drain pipes and the extraction pipes are respectively connected to the upper and lower ends of the elastic rubber tube. One-way valve structures are arranged on both the extraction pipes and the drain pipes. Moreover, a filter screen structure is arranged at the port of the drain pipe. During the twisting process of the elastic rubber tube, the extraction pipes adsorb the dropped impurities through negative pressure. When the elastic rubber tube is straightened, liquid impacts the filter element through the drain pipes.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: This oil filter with high filtration accuracy can automatically clean the filter element in multiple ways during use, effectively avoiding blockage of the filter element, and can automatically collect the impurities after cleaning, which is convenient for subsequent cleaning. The specific content is as follows; 1. An internal movable slip ring and a sealing diaphragm are provided. As the engine oil is transported, the internal movable slip ring and the sealing diaphragm can be automatically lifted along the fixed central pipe under the action of the oil pressure, so that the internal movable slip ring can drive the subsequent cleaning mechanism to automatically clean the filter element. When the internal movable slip ring cannot be lifted, the sealing diaphragm will undergo elastic deformation under the action of the oil pressure, allowing the engine oil to flow through the center of the internal movable slip ring to achieve the normal cyclic transportation of the engine oil. When the internal movable slip ring and the sealing diaphragm are reset and lowered, the oil in the fixed central pipe can be pushed downward to achieve the automatic backwashing of the filter element; 2. An adjusting slide base and cleaning blades are provided. As the internal movable slip ring moves upward, it can drive the adjusting slide base to move upward synchronously through a pull rope, enabling the adjusting slide base to drive multiple cleaning blades to perform synchronous lifting adjustment. Thus, the cleaning blades can automatically scrape off the impurities filtered out on the outer side of the filter element, effectively preventing the filter element from being blocked and effectively improving the filtration accuracy; 3. A rotating seat and an elastic rubber tube are provided. As the adjusting slide base is adjusted in height, the adjusting slide base can stretch the elastic rubber tube, causing the elastic rubber tube to change from being twisted to being straightened, thereby driving the rotating seat to perform elastic rotation. When the oil transportation is completed, the rotating seat will perform elastic rotation and reset, twisting the elastic rubber tube to create a negative pressure between the elastic rubber tube and the housing, and then extracting the scraped impurities through a suction tube. When the subsequent suction tube is straightened again, the space between the housing and the elastic rubber tube can be reduced to achieve the automatic drainage of the oil. Subsequently, by disassembling the adjusting slide base, the impurities collected on the outer side of the elastic rubber tube can be centrally processed, effectively reducing the probability of the filter element being blocked. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a three-dimensional structural schematic diagram of the present invention; Figure 2 is a sectional structural schematic diagram of the housing of the present invention; Figure 3 is a main sectional structural schematic diagram of the present invention; Figure 4 is of the present invention Figure 3 an enlarged structural schematic diagram at position A; Figure 5 is of the present invention Figure 3 an enlarged structural schematic diagram at position B; Figure 6 is a structural schematic diagram of the internal movable slip ring and the sealing diaphragm of the present invention; Figure 7 is a connection structural schematic diagram of the adjusting slide base and the cleaning blades of the present invention; Figure 8 is a top sectional structural schematic diagram of the present invention; Figure 9 is a disassembled structural schematic diagram of the present invention.

[0016] In the figure: 1. Housing; 2. Installation cover; 3. Oil inlet hole; 4. Outlet oil pipe; 5. Check diaphragm; 6. Filter element; 601. Spring; 7. Fixed central pipe; 8. Built-in movable sliding ring; 9. Sealing diaphragm; 10. Limit frame; 11. Pull rope; 12. Adjusting sliding seat; 13. Cleaning scraper; 14. Rotating seat; 15. Elastic rubber tube; 16. Extraction pipe; 17. Drain pipe. Specific embodiments

[0017] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0018] Embodiment 1: Most of the existing engine oil filters adopt a single brush body cleaning method, resulting in limited cleaning effect of the filter element 6 and being prone to blockage during use. To solve this technical problem, the following technical content is disclosed in this embodiment. Please refer to Figures 1-4 and Figures 6-8 as shown; An engine oil filter with high filtration accuracy includes a housing 1 installed on the vehicle engine oil delivery system. An installation cover 2 is hermetically and fixedly installed at the upper end of the housing 1. An oil inlet hole 3 is opened on the installation cover 2. An outlet oil pipe 4 penetrates through the center position of the installation cover 2. Meanwhile, a filter element 6 is installed inside the housing 1. A fixed central pipe 7 is fixedly installed inside the upper frame of the filter element 6. An internal movable sliding ring 8 is movably installed inside the fixed central pipe 7. Sealing diaphragms 9 are evenly fixedly installed inside the internal movable sliding ring 8. An adjusting sliding seat 12 is slidably arranged on the inner wall of the housing 1. A cleaning assembly is installed inside the adjusting sliding seat 12. A rotating seat 14 is rotatably installed on the lower inner wall of the housing 1. An elastic rubber tube 15 is connected between the adjusting sliding seat 12 and the rotating seat 14. Oil inlet holes 3 are evenly opened on the installation cover 2. The oil inlet holes 3 are distributed outside the outlet oil pipe 4. The outlet oil pipe 4 and the housing 1 are coaxially arranged. A check diaphragm 5 is also installed between the upper end of the installation cover 2 and the filter element 6. The check diaphragm 5 is funnel-shaped. The upper part of the check diaphragm 5 fits against the lower surface of the installation cover 2 and covers the oil inlet hole 3. The lower part of the check diaphragm 5 is hermetically and butt-jointly attached to the upper end pipe orifice of the filter element 6. A spring 601 is connected between the lower end of the filter element 6 and the lower inner wall of the housing 1.

[0019] The fixed central pipe 7 is fixedly installed on the inner wall of the upper end of the filter element 6. The fixed central pipe 7 is communicated with both the lower ends of the outlet oil pipe 4 and the check diaphragm 5. The fixed central pipe 7 and the filter element 6 are coaxially arranged.

[0020] The outer wall of the built-in movable slip ring 8 is attached to the inner wall of the fixed central tube 7, and the fixed central tube 7 and the built-in movable slip ring 8 are coaxially arranged. A plurality of sealing diaphragms 9 inside the built-in movable slip ring 8 are mutually attached to achieve the sealing inside the built-in movable slip ring 8. Meanwhile, the built-in movable slip ring 8 slides upward along the inner wall of the fixed central tube 7 under the action of hydraulic pressure.

[0021] The inner wall of the built-in movable slip ring 8 is also evenly and fixedly provided with a limiting frame 10, and the limiting frame 10 is attached to the splicing position of two adjacent sealing diaphragms 9 to prevent the sealing diaphragms 9 from deforming and turning downward, and the limiting frame 10 is located below the sealing diaphragms 9.

[0022] A pull rope 11 is fixedly connected to the lower surface of the built-in movable slip ring 8, and one end of the pull rope 11 far from the built-in movable slip ring 8 is fixedly connected to the adjusting slide seat 12. During the upward movement of the built-in movable slip ring 8, the adjusting slide seat 12 is pulled to slide upward synchronously inside the housing 1 through the pull rope 11. Guide blocks for limiting the adjusting slide seat 12 are evenly arranged on the inner wall of the housing 1.

[0023] The cleaning assembly fixedly installed inside the adjusting slide seat 12 includes multiple groups of cleaning blades 13, and the cleaning blades 13 are attached to the outer wall of the filter element 6. The adjusting slide seat 12 drives the cleaning blades 13 to perform synchronous lifting adjustment to achieve the scraping and cleaning of the outer wall of the filter element 6. Meanwhile, the upper surface of the cleaning blades 13 is inclined. The rotating seat 14 is elastically rotatably connected to the housing 1, and the elastic rubber tube 15 is in a twisted state in the initial state. During the upward movement of the adjusting slide seat 12, the elastic rubber tube 15 is pulled to return to a flat state, and during the upward movement of the adjusting slide seat 12, the rotating seat 14 is elastically rotated through the elastic rubber tube 15.

[0024] By adopting the above technical solution, when filtering engine oil during transportation, the engine oil enters the inner side of the housing 1 through the oil inlet hole 3. At this time, the engine oil passes through the filter element 6 and enters the fixed central pipe 7, causing the oil pressure inside the fixed central pipe 7 to rise. At this time, the built-in movable slip ring 8 and the sealing diaphragm 9 move upward along the fixed central pipe 7 under the action of the oil pressure. When the built-in movable slip ring 8 cannot move upward, the sealing diaphragm 9 undergoes elastic deformation and bending under the action of the oil pressure, enabling the engine oil to flow smoothly into the oil outlet pipe 4. At the same time, as the built-in movable slip ring 8 moves upward, it pulls the adjusting slide base 12 to move upward synchronously inside the housing 1 through the pull rope 11. At this time, the cleaning blade 13 fixed inside the adjusting slide base 12 can automatically clean the outer side of the filter element 6. When the engine oil transportation stops, the rotating seat 14 undergoes elastic rotational reset, thereby twisting the elastic rubber tube 15, causing the elastic rubber tube 15 to pull the adjusting slide base 12 to move downward synchronously. The adjusting slide base 12 pulls the built-in movable slip ring 8 to move downward synchronously through the pull rope 11. At this time, the built-in movable slip ring 8 can push the engine oil inside the fixed central pipe 7 out, thereby realizing the backwashing of the filter element 6, further improving the cleaning effect of the filter element 6 and reducing the probability of the filter element 6 being blocked.

[0025] Embodiment 2: The technical content disclosed in this embodiment is a further improvement based on the above Embodiment 1. In the existing engine oil filter, it is inconvenient to centrally collect and process the impurities removed during cleaning, making it easy for the impurities to reattach and cause blockage. To further solve this technical problem, the following technical content is disclosed in this embodiment, as Figures 3-5 and Figure 9 shown; A suction pipe 16 is fixedly installed on the rotating seat 14, and drain pipes 17 are uniformly fixedly installed on the adjusting slide base 12. Moreover, suction pipes 16 are uniformly fixedly installed on the rotating seat 14, and the drain pipes 17 and the suction pipes 16 are respectively connected to the upper and lower ends of the elastic rubber tube 15. At the same time, one-way valve structures are provided on both the suction pipes 16 and the drain pipes 17, and a filter screen structure is provided at the port of the drain pipe 17. During the twisting process of the elastic rubber tube 15, the suction pipe 16 adsorbs the fallen impurities through negative pressure, and when the elastic rubber tube 15 is straightened, liquid impact is applied to the filter element 6 through the drain pipe 17.

[0026] By adopting the above technical solution, after the oil delivery stops, the rotating seat 14 will perform elastic rotation reset. At this time, the rotating seat 14 can twist the elastic rubber hose 15, increasing the space between the elastic rubber hose 15 and the housing 1. At this time, the extraction pipe 16 can automatically extract and clean the fallen impurities. Since the rotating seat 14 drives the extraction pipe 16 to rotate synchronously, the extraction and collection effect of the extraction pipe 16 on the impurities is further improved. When the subsequent oil is delivered again, the elastic rubber hose 15 will be straightened by the adjusting slide seat 12, reducing the gap between the housing 1 and the elastic rubber hose 15, so that the excess oil can be extruded. After opening the installation cover 2 later, pulling up the adjusting slide seat 12 can cause the elastic rubber hose 15 to stretch, facilitating the centralized automatic cleaning of the impurities stored between the elastic rubber hose 15 and the housing 1.

[0027] The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

[0028] Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An oil filter with high filtration accuracy, comprising a housing (1) installed on the vehicle oil delivery system. An installation cover (2) is hermetically and fixedly installed at the upper end of the housing (1). An oil inlet hole (3) is provided on the installation cover (2). A drain pipe (4) penetrates through the center position of the installation cover (2). Meanwhile, a filter element (6) is installed inside the housing (1). It is characterized in that Inside the upper part of the frame of the filter element (6), a fixed central pipe (7) is fixedly installed. An internal movable sliding ring (8) is movably installed inside the fixed central pipe (7). A sealing diaphragm (9) is evenly and fixedly installed inside the internal movable sliding ring (8). An adjusting sliding seat (12) is slidably arranged on the inner wall of the housing (1). A cleaning component is installed inside the adjusting sliding seat (12). A rotating seat (14) is rotatably installed on the lower inner wall of the housing (1). An elastic rubber tube (15) is connected between the adjusting sliding seat (12) and the rotating seat (14). A suction pipe (16) is fixedly installed on the rotating seat (14).

2. The oil filter with high filtration accuracy according to claim 1, characterized in that: The installation cover (2) is evenly provided with oil inlet holes (3). The oil inlet holes (3) are distributed outside the drain pipe (4). The drain pipe (4) and the housing (1) are coaxially arranged. A check diaphragm (5) is also installed between the upper end of the installation cover (2) and the filter element (6). The check diaphragm (5) is arranged in a funnel shape. The upper part of the check diaphragm (5) fits against the lower surface of the installation cover (2) and covers the oil inlet holes (3). The lower part of the check diaphragm (5) is hermetically butt-jointed with the upper end pipe orifice of the filter element (6). A spring (601) is connected between the lower end of the filter element (6) and the lower inner wall of the housing (1).

3. The oil filter with high filtration accuracy according to claim 1, wherein: The fixed central pipe (7) is fixedly installed on the upper inner wall of the filter element (6). The fixed central pipe (7) communicates with the lower ends of both the drain pipe (4) and the check diaphragm (5). The fixed central pipe (7) and the filter element (6) are coaxially arranged.

4. A high filtration precision oil filter according to claim 1, characterized in that: The outer wall of the internal movable sliding ring (8) fits against the inner wall of the fixed central pipe (7). The fixed central pipe (7) and the internal movable sliding ring (8) are coaxially arranged. Multiple sealing diaphragms (9) inside the internal movable sliding ring (8) are mutually attached to achieve sealing inside the internal movable sliding ring (8). Meanwhile, the internal movable sliding ring (8) slides upward along the inner wall of the fixed central pipe (7) under the action of hydraulic pressure.

5. The oil filter with high filtration accuracy according to claim 4, characterized in that: Limit brackets (10) are also evenly and fixedly installed on the inner wall of the internal movable sliding ring (8). The limit brackets (10) fit against the splicing position of two adjacent sealing diaphragms (9) to prevent the sealing diaphragms (9) from deforming and flipping downward. The limit brackets (10) are located below the sealing diaphragms (9).

6. The oil filter with high filtration accuracy according to claim 1, characterized in that: A pull rope (11) is fixedly connected to the lower surface of the internal movable sliding ring (8). The end of the pull rope (11) away from the internal movable sliding ring (8) is fixedly connected to the adjusting sliding seat (12). During the upward movement of the internal movable sliding ring (8), the adjusting sliding seat (12) is pulled by the pull rope (11) to slide upward synchronously inside the housing (1). Guide blocks for limiting the adjusting sliding seat (12) are evenly arranged on the inner wall of the housing (1).

7. The oil filter with high filtration accuracy according to claim 1, wherein: The cleaning assembly fixedly installed inside the adjusting sliding seat (12) includes multiple groups of cleaning blades (13). The cleaning blades (13) are attached to the outer wall of the filter element (6). The adjusting sliding seat (12) drives the cleaning blades (13) to perform synchronous lifting adjustment to achieve scraping and cleaning of the outer wall of the filter element (6). At the same time, the upper surface of the cleaning blade (13) is inclined.

8. The oil filter with a high filtration accuracy according to claim 1, characterized in that: The rotating seat (14) is elastically rotatably connected to the housing (1). The elastic rubber tube (15) is in a twisted state in the initial state. During the upward movement of the adjusting sliding seat (12), the elastic rubber tube (15) is pulled to restore flatness. At the same time, during the upward movement of the adjusting sliding seat (12), the rotating seat (14) is elastically rotated by pulling the elastic rubber tube (15).

9. The oil filter with high filtration accuracy according to claim 1, characterized in that: The adjusting sliding seat (12) is evenly fixedly installed with drain pipes (17). The rotating seat (14) is evenly fixedly installed with extraction pipes (16). The drain pipes (17) and the extraction pipes (16) are respectively connected to the upper and lower ends of the elastic rubber tube (15). At the same time, one-way valve structures are provided on both the extraction pipes (16) and the drain pipes (17). Moreover, a filter screen structure is provided at the port of the drain pipe (17). During the twisting process of the elastic rubber tube (15), the extraction pipes (16) adsorb the dropped impurities through negative pressure. When the elastic rubber tube (15) is straightened, liquid impact is applied to the filter element (6) through the drain pipes (17).

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