An oil-water separation filter device

Abstract

The utility model belongs to clean equipment technical field discloses an oil -water separation filter equipment. Oil -water separation filter equipment includes casing, first filter subassembly, second filter subassembly, water inlet pipe and water outlet pipe, and the casing is connected with the partition board, and the casing is opened with the blowdown, and the partition board is opened with the backflow hole, first filter subassembly includes the float and the oil collection spare, and the float includes the water inlet and the water outlet, and the water inlet is located the top end of the float, and the water outlet is located the bottom end of the float, and the oil collection spare includes the collection intercommunication oil chamber and the liquid outlet, and the float can be attached to the inner wall of the oil collection chamber and lift, second filter subassembly includes the oil scraping spare, the driving part and a plurality of filter spare, and the filter spare can filter the dust particle in liquid, and the driving part can drive the oil scraping spare removes to scrape the oil in liquid and arrives the blowdown, and the liquid after filtering flows into the water tank. The utility model provides oil -water separation filter equipment can filter oil -water mixture, avoid the grease and block up the oil -water separation equipment, improve the filtration efficiency and effect.

Description

Technical Field

[0001] This utility model relates to the field of cleaning equipment technology, and in particular to an oil-water separation and filtration device. Background Technology

[0002] In industrial production, automotive repair, and catering services, equipment cleaning is a necessary step to ensure operational safety and efficiency. Machining workshops require regular cleaning of molds and cutting tools to remove cutting fluid and metal shavings, while restaurant kitchens need frequent washing of stoves and tableware to remove stubborn grease. These cleaning processes consume large amounts of water, and the resulting wastewater often contains contaminants such as mud, metal particles, and grease, making it difficult to recycle.

[0003] To address the aforementioned problems, existing technologies employ filtration equipment to recover and filter wastewater. However, the pumps in current oil-water separators are typically located in the bottom aqueous phase region. Because grease has a lower density, it floats on the surface, making it difficult for the pump to effectively extract the grease from the water layer. Consequently, the filtration device struggles to effectively filter the oil, resulting in low filtration efficiency. Furthermore, the grease that cannot be effectively extracted may solidify within the oil-water separator, requiring downtime for maintenance and increasing maintenance costs. Utility Model Content

[0004] The purpose of this invention is to provide an oil-water separation and filtration device for filtering oil-water mixtures, avoiding grease clogging of the oil-water separation equipment, and improving filtration efficiency.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] An oil-water separation and filtration device, characterized in that it comprises:

[0007] The housing has a partition plate fixedly connected inside. The top chamber of the partition plate is a filter chamber, and the bottom chamber of the partition plate is a cleaning chamber. A water tank is installed in the cleaning chamber. The housing has a drain port that communicates with the filter chamber, and the partition plate has a return hole.

[0008] The first filter assembly is placed inside the water tank. The first filter assembly includes a float and an oil collection component. The float includes an inlet and an outlet. The inlet is located at the top of the float, and the outlet is located at the bottom of the float. The oil collection component includes an oil collection chamber and an outlet. The oil collection chamber is connected to the outlet. The float is disposed in the oil collection chamber and can move up and down against the inner wall of the oil collection chamber.

[0009] The second filter assembly is disposed in the filter chamber. The second filter assembly includes an oil scraper, a drive unit and multiple filter elements. The filter elements are fixedly connected to the housing and can filter dust particles in the liquid. The drive unit can drive the oil scraper to move to scrape the grease in the liquid to the drain port. The filtered liquid flows into the water tank from the return hole.

[0010] The inlet pipe and outlet pipe are provided. One end of the inlet pipe is connected to the outlet and the other end is connected to the inlet of the water pump. One end of the outlet pipe is connected to the outlet of the water pump and the other end is connected to the filter chamber.

[0011] In the aforementioned oil-water separation and filtration device, the float includes a floating part and a water inlet part. The water inlet part is tubular, with the water inlet located at the top of the water inlet part and the water outlet located at the bottom of the water inlet part. The water inlet part is inserted into the floating part, and the floating part can fit against the inner wall of the oil collection chamber.

[0012] The above-mentioned oil-water separation and filtration device is characterized in that the first filtration component further includes an end cap, which is fixedly connected to the top of the oil receiving component, and the end cap is provided with a clearance hole for avoiding the water inlet.

[0013] The aforementioned oil-water separation and filtration device is characterized in that the first filtration component further includes a sealing gasket, which is capable of being clamped between the end cap and the oil collection component.

[0014] The above-mentioned oil-water separation and filtration device is characterized in that the first filtration component further includes a fixing hoop and a connecting piece, the fixing hoop being able to surround the outer wall of the oil collecting component, the connecting piece being fixedly connected to the fixing hoop, and the connecting piece being able to be fixedly connected to the inner wall of the water tank.

[0015] The above-mentioned oil-water separation and filtration device is characterized in that the second filtration component further includes a transmission gear and a transmission chain, the transmission gear being able to mesh with the transmission chain, the transmission chain being connected to the oil scraper, and the oil scraper moving with the transmission chain being able to scrape the grease in the liquid to the drain port.

[0016] The aforementioned oil-water separation and filtration device is characterized in that it further includes a receiving plate, which is fixedly connected to the housing and located below the drain outlet. The receiving plate extends downward at an incline, allowing the grease dripping from the drain outlet to slide down the receiving plate into the collection device.

[0017] The above-mentioned oil-water separation and filtration device is characterized in that a plurality of filter elements are spaced apart along the length direction of the housing, each filter element including a mounting column and a flow-damping plate, the mounting column extending vertically and fixedly connected to the housing, the plurality of mounting columns being spaced apart along the width direction of the housing, and the plurality of flow-damping plates being fixedly connected to the mounting column at intervals along the vertical direction, the flow-damping plate being capable of filtering dust particles in the liquid.

[0018] The aforementioned oil-water separation and filtration device is characterized in that it further includes a baffle plate and an inlet pipe. The baffle plate is fixedly connected to the housing and located within the filtration chamber. The baffle plate and the housing form a buffer chamber. The inlet pipe is fixedly connected to the housing. The bottom end of the inlet pipe is connected to the outlet pipe. The other end of the inlet pipe is higher than the buffer chamber. The liquid flowing out of the inlet pipe first flows into the buffer chamber and then overflows from the buffer chamber into the filtration chamber for filtration.

[0019] The aforementioned oil-water separation and filtration device is characterized in that it further includes a return pipe, the return hole is connected to the return pipe, and the liquid in the filtration chamber can flow from the return hole into the return pipe and then into the water tank.

[0020] The beneficial effects of this utility model are:

[0021] The oil-water separation and filtration device provided by this utility model includes a shell, a first filter assembly, a second filter assembly, an inlet pipe, and an outlet pipe. The shell is sealed to prevent external impurities from entering the filter chamber, thus improving the filtration effect. Liquid in the water tank flows in through the inlet and out through the outlet of the float, causing the float to rise along the inner wall of the oil collection chamber. The water pump draws the liquid from the oil collection chamber through the outlet, allowing the liquid to flow into the filter chamber through the inlet and outlet pipes. After the liquid flows out of the oil collection chamber, due to gravity, the float descends along the inner wall of the oil collection chamber, squeezing the oil layer to the outlet where it is drawn out by the water pump. This ensures that the water pump can effectively extract the oil layer, preventing grease from adhering to the oil collection chamber, eliminating the need for downtime maintenance, and improving filtration efficiency. After the liquid enters the filter chamber, the filter elements filter out dust particles in the liquid, and the oil scraper scrapes the grease on the liquid surface to the parabolic outlet, further improving the filtration effect. The filtered liquid flows back into the water tank through the return hole, reducing water waste. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the oil-water separation and filtration device provided in this embodiment of the present invention from a first-view perspective;

[0023] Figure 2 yes Figure 1 Enlarged view of point A in the middle;

[0024] Figure 3 yes Figure 1Enlarged view of point B in the middle;

[0025] Figure 4 This is a schematic diagram of the oil-water separation and filtration device provided in this embodiment of the present invention from a second perspective.

[0026] Figure 5 This is a schematic diagram of the oil-water separation and filtration device provided in this embodiment of the present invention from a third-person perspective;

[0027] Figure 6 This is a schematic diagram of the structure of the first filter component provided in this embodiment of the utility model;

[0028] Figure 7 This is a schematic diagram of the structure of the filter element provided in this embodiment of the utility model.

[0029] In the picture:

[0030] 1. Shell; 11. Filter chamber; 12. Cleaning chamber; 13. Drain outlet;

[0031] 2. Partition plate; 21. Return hole;

[0032] 3. First filter assembly; 31. Float; 311. Floating part; 312. Water inlet; 32. Oil collection part; 321. Oil collection chamber; 322. Liquid outlet; 33. End cap; 331. Clearance hole; 34. Sealing gasket; 35. Fixing clamp; 36. Connecting piece;

[0033] 4. Second filter assembly; 41. Oil scraper; 42. Drive unit; 43. Filter element; 431. Mounting post; 432. Flow deflector; 44. Drive gear; 45. Drive chain;

[0034] 5. Inlet pipe; 6. Outlet pipe;

[0035] 7. Receiving plate;

[0036] 8. Mudguard plate;

[0037] 9. Return pipe;

[0038] 10. High liquid level baffle plate;

[0039] 100. Water pump. Detailed Implementation

[0040] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar parts or parts having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0041] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0042] In the description of this utility model, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0043] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0044] This utility model provides an oil-water separation and filtration device that can filter oil-water mixtures, prevent grease from clogging the oil-water separation equipment, and improve filtration efficiency and effect.

[0045] like Figures 1 to 7As shown, the oil-water separation and filtration device includes a housing 1, a first filter assembly 3, a second filter assembly 4, an inlet pipe 5, and an outlet pipe 6. A partition plate 2 is fixedly connected inside the housing 1. The top chamber of the partition plate 2 is a filter chamber 11, and the bottom chamber is a cleaning chamber 12. A water tank is installed inside the cleaning chamber 12. The housing 1 has a drain outlet 13 communicating with the filter chamber 11, and the partition plate 2 has a return hole 21. The first filter assembly 3 is placed inside the water tank and includes a float 31 and an oil collector 32. The float 31 includes an inlet and an outlet, with the inlet located at the top and the outlet at the bottom. The oil collector 32 includes an oil collection chamber 321 and a liquid outlet 322. The chamber 321 is connected to the outlet 322. The float 31 is set in the oil receiving chamber 321 and can move up and down against the inner wall of the oil receiving chamber 321. The second filter assembly 4 is set in the filter chamber 11. The second filter assembly 4 includes an oil scraper 41, a drive 42 and multiple filter elements 43. The filter elements 43 are fixedly connected to the housing 1 and can filter dust particles in the liquid. The drive 42 can drive the oil scraper 41 to move to scrape the grease in the liquid to the drain port 13. The filtered liquid flows into the water tank from the return hole 21. One end of the water inlet pipe 5 is connected to the outlet 322 and the other end is connected to the water inlet of the water pump 100. One end of the water outlet pipe 6 is connected to the water outlet of the water pump 100 and the other end is connected to the filter chamber 11.

[0046] The oil-water separation and filtration device provided by this utility model includes a housing 1, a first filter assembly 3, a second filter assembly 4, an inlet pipe 5, and an outlet pipe 6. The housing 1 is sealed to prevent external impurities from entering the filter chamber 11, thereby improving the filtration effect. Liquid in the water tank can flow in from the inlet of the float 31 and out from the outlet, causing the float 31 to float along the inner wall of the oil collection chamber 321. The water pump 100 can draw the liquid in the oil collection chamber 321 out from the outlet 322, so that the liquid flows into the filter chamber 11 through the inlet pipe 5 and the outlet pipe 6. After the liquid flows out of the oil collection chamber 321, due to gravity, the float 31 descends along the inner wall of the oil collection chamber 321, squeezing the oil layer to the outlet 322 where it is drawn out by the water pump 100. This ensures that the water pump 100 can effectively extract the oil layer, preventing grease from adhering to the oil collection chamber 321, eliminating the need for downtime maintenance, and improving filtration efficiency. After the liquid enters the filter chamber 11, the filter element 43 filters the dust particles in the liquid, and the oil scraper 41 scrapes the grease on the surface of the liquid to the drain port 13, which further improves the filtration effect. The filtered liquid flows into the water tank from the return hole 21, reducing the waste of water resources.

[0047] This embodiment does not specifically limit the shape of the housing 1. For example, the housing 1 is rectangular, which is convenient for processing.

[0048] The partition plate 2 can be integrally processed with the shell 1 or manufactured separately. In this embodiment, the partition plate 2 is manufactured separately from the shell 1, and the partition plate 2 is fixedly connected to the shell 1 by existing bolts. The bolt connection is convenient and has high connection strength.

[0049] Float 31 is used to press down the oil layer, thereby increasing the oil extraction rate of water pump 100. In this embodiment, see... Figure 6 The float 31 includes a floating part 311 and a water inlet part 312. The water inlet part 312 is tubular, with the water inlet located at the top and the water outlet located at the bottom. The water inlet part 312 is inserted into the floating part 311, which can fit against the inner wall of the oil collection chamber 321. Because the water inlet part 312 is inserted into the floating part 311, it can be replaced individually if the water inlet part 312 and / or the floating part 311 malfunction, reducing maintenance costs.

[0050] Specifically, the float part 311 is cylindrical in shape, and its size is slightly smaller than the inner diameter of the oil collection chamber 321. The outer surface of the float part 311 is wrapped with a rubber ring to improve the sealing effect. A through hole is opened in the center of the float part 311, and the water inlet part 312 is inserted into the through hole for easy connection.

[0051] Two rectangular notches are provided at the bottom of the water inlet 312 to increase the water flow rate. During use, the liquid in the water tank flows into the water inlet 312 through the inlet and into the oil collection chamber 321 through the outlet. As the liquid inside the oil collection chamber 321 increases, the float 31 will rise along the inner wall of the oil collection chamber 321 due to the buoyancy of the liquid. The rubber ring can seal the oil collection chamber 321 to prevent liquid from flowing from the gap between the float 31 and the oil collection component 32 to the top of the float 31.

[0052] After the water pump 100 is turned on, the liquid in the oil collection chamber 321 flows out from the outlet 322. The float 31 descends due to gravity, pressing the oil layer down to the oil outlet, thus improving the efficiency of the water pump 100 in extracting grease. Simultaneously, liquid from the water tank continuously flows into the oil collection chamber 321, causing the float 31 to rise. The repeated rise and fall of the float 31 within the oil collection chamber 321 agitates the liquid inside, causing the oil and water layers to mix, further improving the efficiency of the water pump 100 in extracting grease.

[0053] In this embodiment, the first filter assembly 3 also includes an end cap 33, which can be fixedly connected to the top of the oil collecting component 32. The end cap 33 has a clearance hole 331, which is used to avoid the water inlet 312, so as to prevent liquid from overflowing the oil collecting chamber 321 and causing the float 31 to float out of the oil collecting chamber 321, thereby improving the working stability.

[0054] Furthermore, the first filter assembly 3 also includes a sealing gasket 34, which can be clamped between the end cap 33 and the oil collection component 32 to avoid rigid collision between the end cap 33 and the oil collection component 32 and improve service life.

[0055] End cap 33 and oil catcher 32 are connected by existing bolts, for example, see [link to example]. Figure 6 The sealing gasket 34 is provided with eight first light holes, the end cap 33 is provided with eight second light holes, and the oil collection component 32 is provided with eight threaded holes. The first light holes, second light holes and threaded holes can be aligned one by one, and the end cap 33, sealing gasket 34 and oil collection component 32 are fixed by existing bolts.

[0056] To improve the stability of the oil collection component 32, in this embodiment, the oil collection component 32 is fixedly connected to the inner wall of the water tank. The first filter assembly 3 also includes a fixing hoop 35 and a connecting piece 36. The fixing hoop 35 can surround the outer wall of the oil collection component 32, and the connecting piece 36 is fixedly connected to the fixing hoop 35 and the inner wall of the water tank. The fixing hoop 35 clamps the oil collection component 32, which can improve the clamping stability. The connecting piece 36 is fixed to the water tank by existing bolts, which is convenient for disassembly and improves the efficiency of maintenance of the oil collection component 32.

[0057] Filter element 43 is used to filter dust particles in a liquid, for example, see [link to example]. Figure 1 and Figure 7 Multiple filter elements 43 are spaced apart along the length of the housing 1. Each filter element 43 includes a mounting post 431 and a flow-damping plate 432. The mounting post 431 extends vertically and is fixedly connected to the housing 1. Multiple mounting posts 431 are spaced apart along the width of the housing 1. Multiple flow-damping plates 432 are fixedly connected to the mounting posts 431 at intervals along the vertical direction. The flow-damping plates 432 can filter dust particles in the liquid. Multi-layer filtration improves the filtration efficiency of dust particles, and the multiple mounting posts 431 can evenly distribute the load of the flow-damping plates 432, improving stability. The mounting posts 431 are inserted into the housing 1 and the partition plate 2, making the connection convenient.

[0058] The flow-damping plate 432 can be snapped onto the mounting post 431, making connection convenient and facilitating disassembly and repair in case of damage, thus improving maintenance efficiency. Specifically, the flow-damping plate 432 can be a fishbone-shaped flow-damping plate to further improve the filtration effect of dust particles.

[0059] The scraper 41 is used to scrape away grease from the surface of a liquid. In this embodiment, see [reference needed]. Figure 1 and Figure 2The second filter assembly 4 also includes a transmission gear 44 and a transmission chain 45. The transmission gear 44 can mesh with the transmission chain 45. The transmission chain 45 is connected to an oil scraper 41. The oil scraper 41 moves with the transmission chain 45 and can scrape the grease in the liquid to the drain port 13. The transmission chain 45 is rigid and can ensure the movement trajectory of the oil scraper 41.

[0060] The driving component 42 is connected to the transmission gear 44, driving the transmission gear 44 to rotate, which in turn drives the transmission chain 45 to move. The transmission chain 45 drives the oil scraper 41 to move, thereby scraping away the grease on the surface of the liquid. Specifically, the driving component 42 is a motor, which is connected to a reducer, and the reducer is connected to the transmission gear 44.

[0061] Specifically, see Figure 1 , Figure 2 and Figure 4 The oil scraper 41 is an oil scraper blade. Two sets of transmission chains 45 are provided, spaced apart along the width of the housing 1. Multiple sets of transmission gears 44 are provided, each set including two transmission gears 44. The two transmission gears 44 are rotatably connected to both ends of an axle, which is fixedly connected to the housing 1. The transmission gears 44 can mesh with the transmission chains 45, ensuring stable transmission.

[0062] Specifically, the axle extends along the width of the housing 1, and multiple axles are arranged in a quadrilateral. The multiple axles at the bottom are on the same horizontal line, ensuring that the transmission chain 45 is in a horizontal state, thereby enabling the oil scraper 41 to horizontally scrape the grease in the liquid and improve the oil scraping efficiency.

[0063] Furthermore, the oil-water separation filter also includes a receiving plate 7, which is fixedly connected to the housing 1 and located below the drain port 13. The receiving plate 7 extends downward at an angle, allowing the grease dripping from the drain port 13 to slide down along the receiving plate 7 into the collection device. This prevents grease dripping from the drain port 13 from splashing and protects the environment.

[0064] The receiving plate 7 is located at least partially inside the filter chamber 11 and extends downward at an angle from the drain outlet 13. The oil scraper 41 can abut against the receiving plate 7 and move upward along the receiving plate 7 to transport the grease to the drain outlet 13, thus preventing the grease from dripping into the liquid during the transportation process and further improving the efficiency of grease filtration.

[0065] Specifically, the oil-water separation filter also includes a high-level baffle plate 10, which is fixedly connected to the partition plate 2 and extends vertically upward. The top of the high-level baffle plate 10 is higher than the bottom of the receiving plate 7 located in the filter chamber 11, preventing liquid from overflowing from the high-level baffle plate 10 and flowing into the return hole 21, ensuring that the liquid surface contacts the oil scraping component 41, and improving the oil scraping effect.

[0066] In this embodiment, the oil-water separation and filtration device further includes a mud-blocking plate 8 and an inlet pipe. The mud-blocking plate 8 is fixedly connected to the housing 1 and located inside the filtration chamber 11, forming a buffer chamber with the housing 1. The inlet pipe is fixedly connected to the housing 1, with its bottom end connected to the outlet pipe 6 and its other end higher than the buffer chamber. The liquid flowing out of the inlet pipe first flows into the buffer chamber and then overflows from the buffer chamber into the filtration chamber 11 for filtration. The damping plate can buffer the liquid, allowing it to overflow into the filtration chamber 11, thereby reducing the liquid flow rate, increasing the contact time between the liquid and the filter element 43, and thus improving the filtration effect.

[0067] For example, the oil-water separation filter also includes a return pipe 9, and the return hole 21 is connected to the return pipe 9. The liquid in the filter chamber 11 can flow from the return hole 21 into the return pipe 9 and then into the water tank, thereby improving the recycling rate of the liquid and saving water resources.

[0068] Specifically, the partition plate 2 also has two cleaning holes, each of which is connected to a switch valve. The two cleaning holes are located between the mud barrier plate 8 and the high liquid level baffle plate 10. When the switch valve is opened, the sewage between the mud barrier plate 8 and the high liquid level baffle plate 10 can be discharged, which facilitates the cleaning and maintenance of the second filter component 4.

[0069] In the oil-water separation and filtration device provided by this utility model, the float 31 is installed in the oil collection chamber 321, and the oil collection chamber 321 is fixed to the inner wall of the water tank. Liquid in the water tank flows into the oil collection chamber 321 and enters the filtration chamber 11 through the liquid outlet 322 for filtration. The difference in the amount of liquid entering and leaving the oil collection chamber 321 causes the float 31 to move up and down, disturbing the liquid, mixing the oil and water layers, and improving the efficiency of the water pump 100 in extracting grease.

[0070] Inside the filter chamber 11, liquid flows into the buffer chamber. Once the liquid level reaches the height of the baffle plate 8, it begins to overflow into the filter chamber 11, contacting the filter element 43 to filter dust particles. The high-level baffle plate 10 prevents liquid from flowing into the return hole 21. After the liquid level continues to rise to the top of the high-level baffle plate 10, it begins to overflow into the return hole 21, ensuring that the liquid surface contacts the oil scraper 41. The oil scraper 41 moves with the transmission chain 45, scraping away the grease on the liquid surface and transporting it along the receiving plate 7 to the drain outlet 13. The grease slides off the receiving plate 7 into the collection device. The liquid returning from the return hole 21 flows into the water tank through the return pipe 9 for recycling, improving water resource utilization and protecting the environment.

[0071] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. An oil-water separation and filtration device, characterized in that, include: The shell (1) has a partition plate (2) fixedly connected inside it. The top chamber of the partition plate (2) is a filter chamber (11), and the bottom chamber of the partition plate (2) is a cleaning chamber (12). A water tank is provided in the cleaning chamber (12). The shell (1) has a drain port (13) communicating with the filter chamber (11), and the partition plate (2) has a return hole (21). The first filter assembly (3) is placed in the water tank. The first filter assembly (3) includes a float (31) and an oil collection component (32). The float (31) includes an inlet and an outlet. The inlet is located at the top of the float (31), and the outlet is located at the bottom of the float (31). The oil collection component (32) includes an oil collection chamber (321) and an outlet (322). The oil collection chamber (321) is connected to the outlet (322). The float (31) is disposed in the oil collection chamber (321) and can move up and down against the inner wall of the oil collection chamber (321). The second filter assembly (4) is disposed in the filter chamber (11). The second filter assembly (4) includes an oil scraper (41), a drive unit (42), and a plurality of filter elements (43). The filter elements (43) are fixedly connected to the housing (1) and can filter dust particles in the liquid. The drive unit (42) can drive the oil scraper (41) to move to scrape the grease in the liquid to the drain port (13). The filtered liquid flows into the water tank from the return hole (21). The inlet pipe (5) and outlet pipe (6) are connected to the outlet (322) at one end and to the inlet of the water pump (100) at the other end. The outlet pipe (6) is connected to the outlet of the water pump (100) at one end and to the filter chamber (11) at the other end.

2. The oil-water separation and filtration device according to claim 1, characterized in that, The float (31) includes a floating part (311) and a water inlet part (312). The water inlet part (312) is tubular. The water inlet is located at the top of the water inlet part (312), and the water outlet is located at the bottom of the water inlet part (312). The water inlet part (312) is inserted into the floating part (311), and the floating part (311) can fit against the inner wall of the oil collection chamber (321).

3. The oil-water separation and filtration device according to claim 2, characterized in that, The first filter assembly (3) further includes an end cap (33), which can be fixedly connected to the top of the oil collection member (32). The end cap (33) has a clearance hole (331) for avoiding the water inlet (312).

4. The oil-water separation and filtration device according to claim 3, characterized in that, The first filter assembly (3) further includes a sealing gasket (34) which can be clamped between the end cap (33) and the oil collection member (32).

5. The oil-water separation and filtration device according to claim 1, characterized in that, The first filter assembly (3) further includes a fixing hoop (35) and a connecting piece (36). The fixing hoop (35) can be surrounded on the outer wall of the oil collecting member (32), and the connecting piece (36) is fixedly connected to the fixing hoop (35) and can be fixedly connected to the inner wall of the water tank.

6. The oil-water separation and filtration device according to claim 1, characterized in that, The second filter assembly (4) further includes a transmission gear (44) and a transmission chain (45). The transmission gear (44) is capable of meshing with the transmission chain (45). The transmission chain (45) is connected to the oil scraper (41). The oil scraper (41) moves with the transmission chain (45) and can scrape the grease in the liquid to the drain port (13).

7. The oil-water separation and filtration device according to claim 1, characterized in that, The oil-water separation and filtration device also includes a receiving plate (7), which is fixedly connected to the housing (1) and located below the drain port (13). The receiving plate (7) extends downward at an angle, and the grease dripping from the drain port (13) can slide down the receiving plate (7) into the collection device.

8. The oil-water separation and filtration device according to claim 1, characterized in that, Multiple filter elements (43) are spaced apart along the length of the housing (1). Each filter element (43) includes a mounting post (431) and a flow-damping plate (432). The mounting post (431) extends vertically and is fixedly connected to the housing (1). Multiple mounting posts (431) are spaced apart along the width of the housing (1). Multiple flow-damping plates (432) are fixedly connected vertically to the mounting posts (431). The flow-damping plates (432) are capable of filtering dust particles in the liquid.

9. The oil-water separation and filtration device according to any one of claims 1-8, characterized in that, The oil-water separation and filtration device also includes a mud-blocking plate (8) and an inlet pipe. The mud-blocking plate (8) is fixedly connected to the housing (1) and located in the filtration chamber (11). The mud-blocking plate (8) and the housing (1) form a buffer chamber. The inlet pipe is fixedly connected to the housing (1). The bottom end of the inlet pipe is connected to the outlet pipe (6). The other end of the inlet pipe is higher than the buffer chamber. The liquid flowing out of the inlet pipe first flows into the buffer chamber and then overflows from the buffer chamber into the filtration chamber (11) for filtration.

10. The oil-water separation and filtration device according to any one of claims 1-8, characterized in that, The oil-water separation and filtration device also includes a return pipe (9), and the return hole (21) is connected to the return pipe (9). The liquid in the filtration chamber (11) can flow from the return hole (21) into the return pipe (9) and then into the water tank.

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