A multi-stage oil filter and method of use thereof

Abstract

The application provides a multi-stage oil filter and a use method thereof, and belongs to the technical field of oil purification. The application solves the problems of high material consumption and low oil-water separation efficiency. The application comprises a first oil tank, a second oil tank and a third oil tank, the first oil tank is communicated with the second oil tank, the second oil tank is communicated with the third oil tank, a blowdown port is arranged at the bottom of the second oil tank and the third oil tank, a plurality of oil gathering plates are arranged in the first oil tank, the plurality of oil gathering plates are arranged at equal intervals along the flow direction of the oil-water mixture, a separation cover is arranged in the first oil tank and the second oil tank, an adjusting block is arranged on the inner side of the separation cover, an opening is arranged on the bottom side of the separation cover, and the adjusting block in the first oil tank is arranged close to the communication part between the first oil tank and the second oil tank. The application is mainly used for filtering oil in the oil-water mixture.

Description

Technical Field

[0001] This invention belongs to the field of oil purification technology, and in particular relates to a multi-stage oil filter. Background Technology

[0002] Oil separators on the market primarily rely on filter cartridges to filter oil and water. Filter cartridges effectively remove grease and suspended solids from water, providing good filtration. However, cartridge filtration is expensive, requiring regular cartridge replacement and resulting in high maintenance costs. Improper use can also lead to filter clogging, affecting filtration efficiency. Belt-type oil separators have a simple structure and do not require replacement of consumables, but their oil removal efficiency is low, requiring frequent cleaning or replacement of the belt. They are also ineffective for handling high concentrations of oil. Float-type absorber filters utilize buoyancy to automatically absorb grease from the water surface, but their simple structure, low oil removal efficiency, and the need for regular float cleaning or replacement also increase consumable costs, leading to higher filtration costs. Summary of the Invention

[0003] In view of this, the present invention aims to provide a multi-stage oil filter to solve the problems of high consumable costs and low oil-water separation efficiency.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a multi-stage oil filter, comprising a first oil tank, a second oil tank, and a third oil tank, wherein the first oil tank is connected to the second oil tank, and the second oil tank is connected to the third oil tank; both the second and third oil tanks are provided with drain ports at their bottoms; the first oil tank contains a plurality of oil-collecting plates, which are equally spaced along the flow direction of the oil-water mixture; the first and second oil tanks are provided with isolation covers, wherein an adjusting block is provided inside the isolation cover, and an opening is provided on the bottom side of the isolation cover; the adjusting block in the first oil tank is located near the connection between the first and second oil tanks.

[0005] Furthermore, the oil-coated plate is made of stainless steel and has a rough surface.

[0006] Furthermore, the isolation enclosure includes a first isolation enclosure and a second isolation enclosure, wherein the first isolation enclosure is disposed within the first oil tank and the second isolation enclosure is disposed within the second oil tank.

[0007] Furthermore, the adjusting block includes a first adjusting block and a second adjusting block. The first adjusting block is disposed inside a first isolation cover, and the second adjusting block is disposed inside a second isolation cover. The first adjusting block and the second adjusting block have the same external shape and structure, and the circumferential dimension of the first adjusting block is larger than that of the second adjusting block.

[0008] Furthermore, the adjusting block includes an adjusting rod, a sleeve, and a connector. The adjusting rod is connected to the top of the sleeve, and threads are provided on both the inner surface of the sleeve and the outer surface of the connector. The sleeve and the connector are connected by threads.

[0009] Furthermore, the first oil tank is connected to the slow oil tank, the slow oil tank is connected to the buffer pipe, and a drain outlet is provided at the bottom of the slow oil tank.

[0010] Furthermore, the buffer pipe includes an inlet pipe, a branch pipe, and a fixed flange. The branch pipe is sleeved on the outside of the inlet pipe. One end of the branch pipe is connected to the inlet pipe through the fixed flange. Elliptical through holes are equally spaced on the side walls of the inlet pipe and the branch pipe, and are connected to the buffer tank through the elliptical through holes.

[0011] Furthermore, the first oil tank, the second oil tank, and the slow-release tank are all housed inside the casing. A handle is provided on the top of the casing, and a transparent cover is provided on the side of the casing near the second oil tank.

[0012] Furthermore, a ball valve is installed at the drain outlet at the bottom of the third oil tank.

[0013] A method of using a multi-stage oil filter includes the following steps:

[0014] S1: The oil-water mixture flows into the first oil tank. Small oil droplets in the oil-water mixture adhere to several oil-gathering plates in the first oil tank, causing the small oil droplets to converge into large oil droplets. The oil-water mixture separates into layers due to gravity.

[0015] S3: Adjust the height of the regulating block in the first oil tank so that the oil-water mixture in the first oil tank flows into the second oil tank, completing the first oil-water separation;

[0016] S4: Adjust the height of the regulating block in the second oil tank so that the oil-water mixture in the second oil tank flows into the third oil tank, completing the second oil-water separation;

[0017] S5: The oil that has completed the two separations enters the third oil tank and is discharged through the third oil tank.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] 1. This invention can achieve efficient oil-water separation. Through multiple oil-water separations, the separation effect is gradually improved, ensuring that the water in the oil-water mixture is removed. The oil-collecting plate is made of stainless steel and the surface is roughened by grinding, which can aggregate small oil droplets into large oil droplets, thereby increasing the buoyancy of the oil droplets and making them easier to float, thus improving the oil-water separation efficiency.

[0020] 2. The present invention uses a universal adjustment block to change the height of the adjustment block, thereby changing the flow direction of the oil-water mixture, thus adapting to the characteristics of different oil-water mixtures and ensuring separation effect;

[0021] 3. This invention achieves multiple separations of oil and water by setting adjustment blocks in two oil tanks respectively. The oil after multiple separations has high purity, which can reduce equipment wear and extend the service life of the equipment.

[0022] 4. This invention has a compact structure, occupies little space, and is easy to install and use;

[0023] 5. The bottom of the oil tank of this invention is equipped with a drain port, which can regularly discharge the settled impurities and particles, maintain the cleanliness and filtration effect of the oil filter. The various components are reasonably set up, which is easy to disassemble and clean. By setting an oil collection plate to replace the filter element in the prior art, only the oil collection plate needs to be cleaned regularly, without the need to replace consumables, resulting in low maintenance costs.

[0024] 6. This invention reduces water and impurities in oil through effective oil-water separation, thereby reducing environmental pollution. Attached Figure Description

[0025] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0026] Figure 1 This is a schematic diagram of the axial side structure of a multi-stage oil filter according to the present invention;

[0027] Figure 2 This is a first-view axial perspective structural diagram of a multi-stage oil filter according to the present invention.

[0028] Figure 3 This is a second-view axial perspective structural diagram of a multi-stage oil filter according to the present invention.

[0029] Figure 4 This is a top-view perspective structural diagram of a multi-stage oil filter according to the present invention;

[0030] Figure 5 This is a schematic diagram of the axial structure of the buffer tube of a multi-stage oil filter according to the present invention;

[0031] Figure 6 This is a schematic cross-sectional view of the buffer tube of a multi-stage oil filter according to the present invention.

[0032] Figure 7 This is a schematic diagram of the axial structure of the regulating valve of a multi-stage oil filter according to the present invention;

[0033] Figure 8 This is a cross-sectional structural diagram of the regulating valve of a multi-stage oil filter according to the present invention.

[0034] In the picture:

[0035] 1. Buffer pipe; 2. Oil tank; 3. First adjusting block; 4. Oil collection plate; 5. First oil reservoir; 6. Second oil reservoir; 7. Second adjusting block; 8. Third oil reservoir; 9. Perspective cover; 10. Water inlet pipe; 11. Water distribution pipe; 12. Fixed flange; 13. Adjusting rod; 14. Sleeve; 15. Connector. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of the present invention can be combined with each other, and the described embodiments are only some embodiments of the present invention, not all embodiments.

[0037] See Figure 1-7 This embodiment describes a multi-stage oil filter, comprising a first oil tank 5, a second oil tank 6, and a third oil tank 8. The first oil tank 5 is connected to the second oil tank 6, and the second oil tank 6 is connected to the third oil tank 8. The first oil tank 5, the second oil tank 6, and the third oil tank 8 undergo multiple stages of processing to obtain a clean oil solution, removing water and other impurities from the oil-water mixture to achieve oil-water separation. Both the second oil tank 6 and the third oil tank 8 have drain ports at their bottoms for periodically discharging collected contaminants to ensure the cleanliness and efficient operation of the oil filter. The first oil tank 5 contains several oil-collecting plates 4, which are evenly spaced along the flow direction of the oil-water mixture. Several oil-collecting plates 4 are provided with openings at the bottom, and the bottom openings are staggered to facilitate the better aggregation of oil in the oil-water mixture into large oil droplets, promote the oil-water separation effect, and thus improve the oil filtration efficiency. The first oil tank 5 and the second oil tank 6 are provided with isolation covers. The inner side of the isolation cover is provided with an adjusting block, and the bottom side of the isolation cover is provided with an opening. The adjusting block in the first oil tank 5 is located near the connection between the first oil tank 5 and the second oil tank 6. The adjusting block and the oil tank where the adjusting block is located form a communicating vessel through the isolation cover. When the adjusting block is lowered, the liquid level inside the glass cover drops while the liquid level outside the glass cover rises. Therefore, by adjusting the height of the adjusting block, the oil-water mixture outside the isolation cover can flow into the next oil tank.

[0038] The working principle of this invention is as follows:

[0039] The oil-water mixture is sequentially separated into three oil tanks: the first oil tank 5, the second oil tank 6, and the third oil tank 8. First, the oil-water mixture enters the first oil tank 5, where several oil-gathering plates 4, evenly spaced, aggregate small oil droplets into larger droplets, increasing buoyancy and making them float more easily, thus achieving gravity stratification of oil and water. The oil-water mixture flows into the second oil tank 6 through the height adjustment block in the first oil tank 5, achieving the first oil-water separation. The oil-water mixture in the second oil tank 6 then flows into the third oil tank 8 through the adjustment block in the second oil tank 6. The water in the second oil tank 6 is discharged through the drain at the bottom, achieving the second oil-water separation. The oil-water mixture after two separations is stored in the third oil tank 8 and finally discharged through the drain at the bottom of the third oil tank 8.

[0040] The oil-absorbing plate 4 is made of stainless steel with a rough surface. Roughening the surface of stainless steel can improve its oleophilicity, allowing the oil in the oil-water mixture to adhere well to the surface of the oil-absorbing plate 4. Furthermore, the oil-absorbing plate 4 made of stainless steel does not need to be replaced regularly, but only needs to be cleaned regularly, thus eliminating the need for consumables.

[0041] The isolation cover includes a first isolation cover and a second isolation cover. The first isolation cover is installed inside the first oil tank 5, and the second isolation cover is installed inside the second oil tank 6. By setting up the isolation cover, the oil tanks are connected. The oil and water in the first oil tank 5 mix and enter the isolation cover through the opening at the bottom of the isolation cover after passing through the oil collecting plate 4. The liquid level inside the isolation cover and the liquid level outside the isolation cover are the same. The liquid level outside the isolation cover is changed by adjusting the height of the adjusting block inside the isolation cover. When the height of the adjusting block decreases, the liquid level inside the isolation cover decreases, while the liquid level outside the isolation cover increases. When the height of the adjusting block increases, the liquid level inside the isolation cover increases, while the liquid level outside the isolation cover decreases.

[0042] The regulating block includes a first regulating block 3 and a second regulating block 7. The first regulating block 3 is disposed inside a first isolation cover, and the second regulating block 7 is disposed inside a second isolation cover. The first regulating block 3 and the second regulating block 7 have the same external structure. The circumferential dimension of the first regulating block 3 is larger than that of the second regulating block 7. By setting the first regulating block 3 and the second regulating block 7 with different circumferential dimensions, the flow rate of the oil-water mixture is controlled. The larger first regulating block 3 can process a large amount of oil-water mixture more quickly, achieving coarse filtration of the oil-water mixture. The smaller second regulating block 7 is used for finer filtration of the oil-water mixture.

[0043] See Figure 7-8In this embodiment, the adjusting block includes an adjusting rod 13, a sleeve 14, and a connector 15. The adjusting rod 13 is connected to the top of the sleeve 14. Both the inner surface of the sleeve 14 and the outer surface of the connector 15 are threaded. The sleeve 14 and the connector 15 are connected by threads. By rotating the adjusting rod 13, the sleeve 14 is rotated, thereby causing the sleeve 14 to move up and down along the connector 15. When the sleeve moves upward, the liquid level outside the glass cover decreases, and the liquid level inside the glass cover rises. When the sleeve moves downward, the liquid level inside the glass cover decreases, and the liquid level outside the glass cover rises. The first oil tank 5 is connected to the slow oil tank 2, and the slow oil tank 2 is connected to the buffer pipe 1. The bottom of the slow oil tank 2 is provided with a drain port. The buffer pipe 1 and the slow oil tank 2 are used to reduce the flow rate of the oil-water mixture so as to reduce impact and end flow before entering the first oil tank 5, thereby improving the filtration efficiency. The slow oil tank 2 serves as a container for storing and stabilizing the liquid flow. The outlet of the slow oil tank 2 is connected to the inlet of the first oil tank 5 so that the oil-water mixture can flow smoothly into the first oil tank 5.

[0044] See Figure 5-6 In this embodiment, the buffer pipe 1 includes an inlet pipe 10, a distribution pipe 11, and a fixed flange 12. The distribution pipe 11 is sleeved on the outside of the inlet pipe 10. The inlet pipe 10 is used to guide the oil-water mixture into the pipe. One end of the distribution pipe 11 is connected to the inlet pipe 10 through the fixed flange 12, which ensures the stability and reliability of the entire structure. Elliptical through holes are evenly spaced on the sidewalls of both the inlet pipe 10 and the distribution pipe 11, communicating with the oil buffer tank 2 through these elliptical through holes. The hole is connected to the oil buffer tank 2. The oil-water mixture flowing in is dispersed through the elliptical openings on the water inlet pipe 10 and the water distribution pipe 11, thereby achieving a more uniform flow. The buffer pipe 1 and the oil buffer tank 2 are used to pre-treat the oil-water mixture to reduce the impact force of the oil-water mixture, thereby protecting other parts of the oil filter and improving the filtration efficiency. The outlet of the oil buffer tank 2 is connected to the inlet of the first oil tank 5, ensuring that the oil-water mixture can flow smoothly from the oil buffer tank 2 into the first oil tank 5, starting the first stage of the filtration process.

[0045] The first oil tank 5, the second oil tank 6, and the slow oil tank 2 are all housed inside the casing. A handle is provided on the top of the casing. The casing includes a top plate, a side plate, and a bottom plate. A handle is provided on the top plate. The side plate and the bottom plate are an integral structure. The top plate can be removed by pulling the handle upwards, which facilitates the adjustment of the regulating valve height. A viewing hood 9 is provided on the side of the casing near the second oil tank 6. The viewing hood is a transparent window, which allows the operator to observe the liquid level and liquid flow through the viewing hood 9, thereby more accurately adjusting the regulating block and achieving a better filtration effect.

[0046] The drain outlet at the bottom of the third oil tank 8 is equipped with a ball valve, which allows for more precise control of the discharge of filtered oil.

[0047] A method of using a multi-stage oil filter includes the following steps:

[0048] S1: The oil-water mixture is pumped into the oil tank 2 through the pneumatic diaphragm pump and the buffer pipe 1. The oil-water mixture is buffered by the buffer pipe 1 and the oil tank 2 to reduce the impact force of the oil-water mixture. The buffered oil-water mixture flows into the first oil tank (5). Small oil droplets in the oil-water mixture adhere to several oil-gathering plates (3) in the first oil tank (5). The oil-gathering plates 4 are made of stainless steel after rough treatment, which improves the oleophilicity of the oil-gathering plates 4 and makes it easier for small oil droplets to adhere to the surface of the oil-gathering plates 4, so that the small oil droplets gather into large oil droplets. Due to the different densities of oil and water, the oil-water mixture will separate into layers under the action of gravity, so that most of the oil floats on the water surface.

[0049] S3: Adjust the height of the adjusting block in the first oil tank (5) to change the liquid level on both sides of the isolation cover. That is, rotate the adjusting rod 13 on the adjusting block downward or upward so that the oil-water mixture in the first oil tank (5) flows into the second oil tank (5), while the water in the lower layer remains in the first oil tank (5), thus completing the first oil-water separation.

[0050] S4: Adjust the height of the adjusting block in the second oil tank (6) to change the liquid level on both sides of the isolation cover. That is, rotate the adjusting rod 13 on the adjusting block downward or upward so that the oil-water mixture in the second oil tank (6) flows into the third oil tank (8), while the water in the lower layer remains in the second oil tank 6. The water in the second oil tank 6 can be discharged through the drain port to complete the second oil-water separation.

[0051] S5: The oil that has completed two separations enters the third oil tank (8) and is discharged through the third oil tank (8). After two separations, the oil in the third oil tank (8) is relatively pure. By opening the ball valve on the drain port at the bottom of the third oil tank (8), the separated oil can be discharged, thus obtaining oil for subsequent use.

[0052] In this way, the present invention can process oil-water mixtures in stages, gradually removing water and impurities from the mixtures to achieve purification. The present invention is also applicable to applications involving high-purity oils. It can ensure the quality of oils, extend their service life, and reduce equipment failures caused by oil contamination.

[0053] The embodiments of the present invention disclosed above are merely illustrative of the invention. These embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention.

Claims

1. A multi-stage oil filter, characterized in that: It includes a first oil tank (5), a second oil tank (6), and a third oil tank (8). The first oil tank (5) is connected to the second oil tank (6), and the second oil tank (6) is connected to the third oil tank (8). Both the second oil tank (6) and the third oil tank (8) have drain outlets at their bottoms. The first oil tank (5) is equipped with several oil-collecting plates (4), which are evenly spaced along the flow direction of the oil-water mixture. The first oil tank (5) and the second oil tank (6) are equipped with isolation covers. The isolation covers have adjusting blocks on their inner sides and openings on their bottom sides. The adjusting blocks in the first oil tank (5) are located near the connection between the first oil tank (5) and the second oil tank (6). The oil-collecting plates (4) are made of stainless steel and have a rough surface. The isolation covers include a first isolation plate. The first isolation cover is located inside the first oil tank (5), and the second isolation cover is located inside the second oil tank (6). The adjusting block includes a first adjusting block (3) and a second adjusting block (7). The first adjusting block (3) is located inside the first isolation cover, and the second adjusting block (7) is located inside the second isolation cover. The first adjusting block (3) and the second adjusting block (7) have the same external structure. The circumferential dimension of the first adjusting block (3) is larger than that of the second adjusting block (7). The adjusting block includes an adjusting rod (13), a sleeve (14), and a connector (15). The adjusting rod (13) is connected to the top of the sleeve (14). The inner surface of the sleeve (14) and the outer surface of the connector (15) are both provided with threads. The sleeve (14) and the connector (15) are connected by threads.

2. The multi-stage oil filter according to claim 1, characterized in that: The first oil tank (5) is connected to the slow oil tank (2), the slow oil tank (2) is connected to the buffer pipe (1), and the slow oil tank (2) is provided with a drain outlet at the bottom.

3. A multi-stage oil filter according to claim 2, characterized in that: The buffer pipe (1) includes an inlet pipe (10), a branch pipe (11) and a fixed flange (12). The branch pipe (11) is sleeved on the outside of the inlet pipe (10). One end of the branch pipe (11) is connected to the inlet pipe (10) through the fixed flange (12). The side walls of the inlet pipe (10) and the branch pipe (11) are provided with elliptical through holes at equal intervals, which are connected to the oil tank (2) through the elliptical through holes.

4. A multi-stage oil filter according to claim 1, characterized in that: The first oil tank (5), the second oil tank (6) and the slow oil tank (2) are all located inside the shell. A handle is provided on the top of the shell, and a transparent cover (9) is provided on the side of the shell near the second oil tank (6).

5. A multi-stage oil filter according to claim 1, characterized in that: The drain outlet at the bottom of the third oil tank (8) is equipped with a ball valve.

6. A method of using the multi-stage oil filter as described in claim 1, characterized in that, Includes the following steps: S1: The oil-water mixture flows into the first oil tank (5). Small oil droplets in the oil-water mixture adhere to several oil-gathering plates (3) in the first oil tank (5), causing the small oil droplets to converge into large oil droplets. The oil-water mixture separates into layers due to gravity. S3: Adjust the height of the adjusting block in the first oil tank (5) so that the oil-water mixture in the first oil tank (5) flows into the second oil tank (5) to complete the first oil-water separation; S4: Adjust the height of the regulating block in the second oil tank (6) so that the oil-water mixture in the second oil tank (6) flows into the third oil tank (8) to complete the second oil-water separation; S5: The oil that has completed the two separations enters the third oil tank (8) and is discharged through the third oil tank (8).

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