Table type oil filtering device

Abstract

The utility model relates to the technical field of oil filtering equipment, in particular to a table type oil filtering device, which comprises a coarse-hole filter element and a fine-hole filter element, a separator is mounted in a filtering shell, and the coarse-hole filter element and the fine-hole filter element are respectively positioned on two sides of the separator. The separator is provided with a dispersion cavity, a communicating hole located in one side of the dispersion cavity and at least two flow dividing ports located in the other side of the dispersion cavity, the communicating hole is communicated with the liquid discharging part of the coarse-hole filter element, and the flow dividing ports are communicated with the liquid inlet part of the fine-hole filter element. According to the device, a combined structure of the coarse-hole filter element and the fine-hole filter element is arranged, so that oil liquid firstly passes through the coarse-hole filter element to intercept large-particle impurities after entering the device, and then enters the fine-hole filter element to be further finely filtered, and the overall filtering efficiency is effectively improved; the structural design is reasonable, the flow balance of the whole fine filtration process can be improved, and local filter element overload is avoided.

Description

Technical Field

[0001] This utility model relates to the field of oil filtration equipment technology, and in particular to a benchtop oil filtration device. Background Technology

[0002] Hydraulic and lubrication systems are widely used in engineering machinery, metallurgical equipment, injection molding equipment, and various industrial automation devices. The stability of their performance is closely related to the cleanliness of the hydraulic fluid. In order to improve system operating efficiency and extend the service life of hydraulic components and lubrication parts, oil filtration equipment is usually used to purify the oil to remove particulate impurities, moisture, oxidation products, and other contaminants.

[0003] In existing technologies, mobile oil filtration carts are widely used in industrial settings for filtering hydraulic oil, lubricating oil, and other fluids due to their compact structure, flexible operation, and strong adaptability. However, traditional oil filtration carts mostly employ a single-stage filtration structure, where the filter element can only achieve a certain level of purification accuracy, making it difficult to simultaneously address both the initial interception of large particulate contaminants and the deep filtration of fine particles. On the one hand, using a fine filter element directly for single-stage filtration can easily lead to premature clogging and frequent replacement, increasing maintenance costs. On the other hand, using only a coarse filter element cannot meet the requirements of some high-cleanliness applications, presenting certain limitations. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of poor filtration performance of single-stage filter cartridges in existing technologies by proposing a benchtop oil filtration device.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A benchtop oil filtration device includes a filter housing with an oil inlet, an oil outlet, and a filter element assembly located between the oil inlet and the oil outlet. The filter element assembly includes a coarse-pore filter element and a fine-pore filter element. A separator is installed inside the filter housing, with the coarse-pore filter element and the fine-pore filter element located on opposite sides of the separator. The separator has a dispersion chamber, a connecting hole on one side of the dispersion chamber, and at least two diversion ports on the other side of the dispersion chamber. The connecting hole communicates with the drain section of the coarse-pore filter element, and the diversion ports communicate with the inlet section of the fine-pore filter element.

[0007] The filter housing has a cylindrical filter chamber. The coarse-pore filter element and the fine-pore filter element are stacked along the axial direction of the filter chamber. The outer peripheral wall of the separator is slidably sealed to the inner peripheral wall of the filter housing. The inner peripheral space of the coarse-pore filter element is defined as the first space and the outer peripheral space is defined as the second space. The second space is connected to the oil inlet. The inner peripheral space of the fine-pore filter element is defined as the fourth space and the outer peripheral space is defined as the third space. The fourth space is connected to the oil outlet. The third space is connected to the first space through a diversion port, a dispersion chamber, and a connecting hole.

[0008] One end of the coarse-pore filter element is sealed against the inner wall of one end of the filter housing, and the other end of the coarse-pore filter element is sealed against the separator. The connecting hole is connected to the first space. One end of the fine-pore filter element is sealed against the inner wall of the other end of the filter housing, and the other end of the fine-pore filter element is sealed against the separator. The third space is connected to the diversion port.

[0009] The filter housing is provided with a second oil inlet. The filter housing is connected to a three-way pipe. The first end of the three-way pipe is connected to an external device, the second end is connected to the oil inlet, and the third end is connected to the second oil inlet. The third end is provided with a pressure relief valve or a switching valve.

[0010] The filter housing is equipped with a first pressure detector in the second space, and the filter housing is equipped with a second pressure detector in the third space.

[0011] The filter housing includes a main cylinder with an open top and a cover that closes the main cylinder.

[0012] The oil filtration device includes a trolley and an oil pump. The filter housing and the oil pump are both mounted on the trolley, and the oil outlet is connected to the oil inlet port of the oil pump.

[0013] The tabletop oil filtration device proposed in this utility model has the following advantages: By setting up a combination structure of coarse-pore filter element and fine-pore filter element, the oil first passes through the coarse-pore filter element to intercept larger particulate impurities after entering the device, and then enters the fine-pore filter element for further fine filtration. This effectively improves the overall filtration efficiency, extends the service life of the fine-pore filter element, and reduces the frequency of filter element replacement and maintenance costs. The oil enters the dispersion chamber after the first-stage filtrate from the coarse filtration. After being fully buffered and evenly distributed in the dispersion chamber, it enters different inlet areas of the fine-pore filter element through multiple diversion ports. This helps to improve the flow balance of the entire fine filtration process and avoid local filter element overload. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the first working mode of this utility model;

[0015] Figure 2 This is a schematic diagram of the second working mode of this utility model.

[0016] In the diagram: 1. Trolley; 2. Oil pump; 3. Main cylinder; 4. First pressure detector; 5. Filter housing; 6. Cover; 7. First space; 8. Second space; 9. Oil inlet; 10. Three-way pipe; 11. Switch valve; 12. Connecting hole; 13. Dispersion chamber; 14. Diverter; 15. Second oil inlet; 16. Third space; 17. Coarse pore filter element; 18. Fourth space; 19. Oil outlet; 20. Second pressure detector; 21. Fine pore filter element. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0018] Reference Figures 1-2 A benchtop oil filtration device includes a filter housing 5, which has an oil inlet 9, an oil outlet 20, and a filter element assembly located between the oil inlet 9 and the oil outlet 20. The filter element assembly includes a coarse-pore filter element 18 and a fine-pore filter element 22. A separator 14 is installed inside the filter housing 5. The coarse-pore filter element 18 and the fine-pore filter element 22 are located on both sides of the separator 14. The separator 14 has a dispersion chamber 13, a connecting hole 12 located on one side of the dispersion chamber 13, and at least two diversion ports 15 located on the other side of the dispersion chamber 13. The connecting hole 12 is connected to the drain section of the coarse-pore filter element 18, and the diversion ports 15 are connected to the inlet section of the fine-pore filter element 22.

[0019] When this device is working, the oil enters the filter housing 5 through the oil inlet 9 and first passes through the coarse pore filter element 18 for primary filtration. The filtered primary filtrate then passes through the fine pore filter element 22 for secondary filtration, and the secondary filtrate is discharged through the oil outlet 20.

[0020] This device employs a combination of coarse-pore and fine-pore filter elements. Upon entering the device, the oil first passes through the coarse-pore filter to intercept larger particles before entering the fine-pore filter for further fine filtration. This effectively improves overall filtration efficiency, extends the lifespan of the fine-pore filter element, and reduces filter replacement frequency and maintenance costs. The oil, after passing through the primary filtrate from the coarse filtration, enters the dispersion chamber. There, it is fully buffered and evenly distributed before entering different inlet areas of the fine-pore filter element through multiple branch ports. This helps improve the flow balance of the entire fine filtration process and prevents localized filter element overload.

[0021] The filter housing 5 has a cylindrical filter chamber. The coarse-pore filter element 18 and the fine-pore filter element 22 are stacked along the axial direction of the filter chamber. The outer peripheral wall of the separator 14 is slidably sealed to the inner peripheral wall of the filter housing 5. The inner peripheral space of the coarse-pore filter element 18 is defined as the first space 7 and the outer peripheral space is defined as the second space 8. The second space 8 is connected to the oil inlet 9. The inner peripheral space of the fine-pore filter element 22 is defined as the fourth space 19 and the outer peripheral space is defined as the third space 17. The fourth space 19 is connected to the oil outlet 20. The third space 17 is connected to the first space 7 through the diversion port 15, the dispersion chamber 13, and the connecting hole 12.

[0022] This device employs this spatial layout, utilizing the axial space of the filter housing to stack coarse and fine filter elements vertically, saving lateral space and resulting in a more compact overall structure, suitable for benchtop or small mobile applications. By placing a separator between the coarse and fine filters and ensuring its outer wall slides and seals against the inner wall of the filter housing, it effectively prevents unfiltered oil from short-circuiting into the fine filtration area, ensuring the grading and sealing of the filtration process. Simultaneously, the clear division of the inner and outer spaces of the filter elements allows the second space to connect with the oil inlet, guiding the oil into the outer periphery of the coarse filter. After coarse filtration, the oil is evenly introduced into the outer periphery of the fine filter through the first space via connecting holes, a dispersion chamber, and a branch outlet, ultimately flowing from the inside out into the fourth space and towards the drain port. This achieves orderly control and improved distribution of the oil flow path, contributing to increased filtration efficiency and filter element lifespan. Furthermore, this layout facilitates filter element installation, replacement, and maintenance, enhancing the overall operability and practicality of the machine.

[0023] One end of the coarse-pore filter element 18 is sealed against the inner wall of one end of the filter housing 5, and the other end of the coarse-pore filter element 18 is sealed against the separator 14. The connecting hole 12 is connected to the first space 7. One end of the fine-pore filter element 22 is sealed against the inner wall of the other end of the filter housing 5, and the other end of the fine-pore filter element 22 is sealed against the separator 14. The third space 17 is connected to the diversion port 15.

[0024] With this structural distribution, the two ends of the coarse-pore filter element and the fine-pore filter element are sealed and abutted against the filter housing and the separator, respectively, ensuring that the oil can only pass through the coarse filter and the fine filter in sequence along a predetermined path, preventing unfiltered or only coarsely filtered oil from bypassing the fine filter and directly entering the oil outlet. The sealing fit between the filter element and the structural components improves the airtightness of the entire filtration system, which helps to improve filtration efficiency and purification effect, ensuring that the cleanliness of the outlet oil meets the standards. The connecting hole 12 is connected to the first space 7, and the diversion port 15 is connected to the third space 17, making the flow path between the coarse filter and the fine filter clear and well-guided, which helps to achieve stable and uniform flow of oil, further improving the reliability and service life of the filtration system.

[0025] The filter housing 5 is provided with a second oil inlet 16. The filter housing 5 is connected to a three-way pipe 10. The first end of the three-way pipe 10 is connected to external equipment, the second end is connected to the oil inlet 9, and the third end is connected to the second oil inlet 16. The third end is provided with a pressure relief valve or a switching valve 11. (Reference) Figure 2 Since the coarse-pore filter element 18 will block most impurities, the probability of clogging increases. This device is equipped with a second oil inlet 16. When the pressure in the second space 8 is high, the pressure relief valve or the switch valve 11 is opened to allow some oil to directly enter the third space 17, avoiding the problem of excessive pressure in the entire device causing equipment damage. This structure can temporarily solve the problem of excessive pressure caused by blockage.

[0026] A first pressure detector 4 is installed in the second space 8, and a second pressure detector 21 is installed in the third space 17. The two pressure detectors are used to determine whether the pressure in the second space 8 and the third space 17 is normal.

[0027] The filter housing 5 includes a main cylinder 3 with an open top and a cover 6 that closes the main cylinder 3. The cover 6 can be removed to repair or replace the coarse pore filter element 18, the fine pore filter element 22, and the separator 14.

[0028] The oil filtration device includes a trolley 1 and an oil pump 2. The filter housing 5 and the oil pump 2 are both mounted on the trolley 1, and the oil drain port 20 is connected to the oil inlet port of the oil pump 2. This facilitates the movement of the entire device.

[0029] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any technical solution, concept, or design obtained by those skilled in the art by making equivalent substitutions or changes based on the technical solution and utility model concept disclosed in the present utility model should be included within the protection scope of the present utility model.

Claims

1. A benchtop oil filtration device, comprising a filter housing (5), the filter housing (5) having an oil inlet (9), an oil outlet (20), and a filter element assembly located between the oil inlet (9) and the oil outlet (20), characterized in that, The filter cartridge assembly includes a coarse-pore filter cartridge (18) and a fine-pore filter cartridge (22). A separator (14) is installed inside the filter housing (5). The coarse-pore filter cartridge (18) and the fine-pore filter cartridge (22) are located on both sides of the separator (14). The separator (14) has a dispersion chamber (13), a connecting hole (12) on one side of the dispersion chamber (13), and at least two diversion ports (15) on the other side of the dispersion chamber (13). The connecting hole (12) is connected to the drain section of the coarse-pore filter cartridge (18), and the diversion ports (15) are connected to the inlet section of the fine-pore filter cartridge (22).

2. The benchtop oil filtration device according to claim 1, characterized in that, The filter housing (5) has a cylindrical filter chamber. The coarse pore filter element (18) and the fine pore filter element (22) are stacked along the axial direction of the filter chamber. The outer peripheral wall of the separator (14) is slidably sealed to the inner peripheral wall of the filter housing (5). The inner peripheral space of the coarse pore filter element (18) is defined as the first space (7) and the outer peripheral space is defined as the second space (8). The second space (8) is connected to the oil inlet (9). The inner peripheral space of the fine pore filter element (22) is defined as the fourth space (19) and the outer peripheral space is defined as the third space (17). The fourth space (19) is connected to the oil outlet (20). The third space (17) is connected to the first space (7) through the diversion port (15), the dispersion chamber (13), and the connecting hole (12).

3. A benchtop oil filtration device according to claim 2, characterized in that, One end of the coarse-pore filter element (18) is sealed against the inner wall of one end of the filter housing (5), and the other end of the coarse-pore filter element (18) is sealed against the separator (14). The connecting hole (12) is connected to the first space (7). One end of the fine-pore filter element (22) is sealed against the inner wall of the other end of the filter housing (5), and the other end of the fine-pore filter element (22) is sealed against the separator (14). The third space (17) is connected to the diversion port (15).

4. A benchtop oil filtration device according to claim 2, characterized in that, The filter housing (5) is provided with a second oil inlet (16). The filter housing (5) is connected to a three-way pipe (10). The first end of the three-way pipe (10) is connected to an external device, the second end is connected to the oil inlet (9), and the third end is connected to the second oil inlet (16). The third end is provided with a pressure relief valve or a switch valve (11).

5. A benchtop oil filtration device according to claim 4, characterized in that, The filter housing (5) is located in the second space (8) and a first pressure detector (4) is installed thereon. The filter housing (5) is located in the third space (17) and a second pressure detector (21) is installed thereon.

6. A benchtop oil filtration device according to any one of claims 2-5, characterized in that, The filter housing (5) includes a main cylinder (3) with an open top and a cover (6) that closes the main cylinder (3).

7. A benchtop oil filtration device according to any one of claims 2-5, characterized in that, The oil filtration device includes a trolley (1) and an oil pump (2). The filter housing (5) and the oil pump (2) are both mounted on the trolley (1). The oil outlet (20) is connected to the oil inlet port of the oil pump (2).

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