Zero-oil precision filter

Abstract

The utility model relates to the field of zero oil, and discloses a zero oil precision filter which comprises a filtering outer cylinder, a connecting sealing assembly, an outlet pipe, a rectifying outer cylinder, an inlet pipe and a filtering assembly, the reducing end of the filtering outer cylinder is fixedly connected with the outlet pipe, and the reducing end of the rectifying outer cylinder is fixedly connected with the inlet pipe. The other end of the rectifying outer cylinder is in sealed connection with the end, away from the outlet pipe, of the filtering outer cylinder through a connecting sealing assembly, a filtering assembly is installed in the filtering outer cylinder corresponding to the rectifying outer cylinder, and a rectifying structure is arranged in the rectifying outer cylinder and comprises a first rectifying structure body and a second rectifying structure body. The first rectifying structure and the second rectifying structure coaxially correspond to the inlet pipe, the first rectifying structure is arranged between the inlet pipe and the second rectifying structure, and a rectifying structure is additionally arranged above the filtering assembly in the outer barrel, so that liquid is uniform in flow direction and flow velocity and uniform in distribution when flowing into the filtering assembly; the rectification structure and the outer cylinder are in clamping connection through the sliding grooves and the sliding blocks, and disassembly and assembly are convenient.

Description

Technical Field

[0001] This utility model relates to the field of zero oil, specifically a zero-oil precision filter. Background Technology

[0002] Oil-free precision filters are high-precision filtration devices used to remove tiny particulate impurities from fluids (gas or liquid) and effectively prevent oil contamination. Their working principle primarily relies on the sieving effect of the filter media (such as filter paper, filter membrane, filter screen, etc.). When fluid containing impurities enters the filter, the impurity particles are intercepted on one side of the filter media, while clean fluid can pass through, thus achieving the purpose of fluid purification. Common oil-free precision cartridge filters include a housing, filter elements, and seals, with the filter element being the core component. Common types include pleated filter cartridges and sintered filter cartridges.

[0003] Existing zero-oil precision cartridge filters have uneven flow rates. When filtering at high flow rates, the fluid distribution inside the cartridge filter may be uneven, causing some areas of the filter element to be overloaded and working under high load for a long time, resulting in premature failure, blockage or damage. Meanwhile, other areas fail to fully perform their filtering function, affecting the overall filtration efficiency. To address this, we propose a zero-oil precision filter. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this invention provides a zero-oil precision filter, which solves the aforementioned problems.

[0006] (II) Technical Solution

[0007] To achieve the above-mentioned objectives, this utility model provides the following technical solution: a zero-oil precision filter, comprising a filter outer cylinder, a connecting sealing assembly, an outlet pipe, a rectifier outer cylinder, an inlet pipe, and a filter assembly. One end of the filter outer cylinder with a variable diameter is fixedly connected to the outlet pipe, and one end of the rectifier outer cylinder with a variable diameter is fixedly connected to the inlet pipe. The other end of the rectifier outer cylinder is sealed to the end of the filter outer cylinder opposite to the outlet pipe via the connecting sealing assembly. A filter assembly is installed inside the filter outer cylinder corresponding to the rectifier outer cylinder. A rectifier structure is provided inside the rectifier outer cylinder, comprising a first rectifier structure and a second rectifier structure. The first and second rectifier structures are coaxially aligned with the inlet pipe, and the first rectifier structure is located between the inlet pipe and the second rectifier structure.

[0008] Preferably, the rectifier outer cylinder has two evenly distributed vertical sliding grooves on its inner cylindrical surface at the end opposite to the inlet pipe opening. A second annular sliding groove is formed inside the rectifier outer cylinder on the side opposite to the opening of the vertical sliding grooves, and the second annular sliding groove communicates with the vertical sliding grooves. An annular sliding groove is formed inside the filter outer cylinder at the middle position of the vertical sliding grooves, and the first annular sliding groove is located between the second annular sliding groove and the side of the rectifier outer cylinder opposite to the inlet pipe opening, and the first annular sliding groove communicates with the vertical sliding grooves.

[0009] Preferably, the first rectification structure includes a tapered diverter and a slider 1. The larger diameter end of the tapered diverter is fixedly connected to two circumferentially evenly distributed sliders 1. The sliders 1 correspond to the annular grooves 2 of the rectification outer cylinder and are snapped between the annular grooves 2. The tapered diverter is located between the rectification outer cylinders and the cone apex of the tapered diverter corresponds to the inlet pipe.

[0010] Preferably, the first rectification structure further includes diversion holes, and a set of evenly distributed diversion holes are opened through the bottom surface of the conical diversion component, the diversion holes penetrating the entire bottom surface and conical surface of the conical diversion component.

[0011] Preferably, the second rectification structure includes a rectification box, two sliders, and Pall rings. Two sliders are fixedly connected to the outer cylindrical surface of the rectification box. The sliders correspond to the annular grooves of the outer cylinder of the rectification box and are snapped between the annular grooves. A set of evenly distributed filtrate holes are opened through both symmetrical planes of the rectification box. A set of Pall rings is randomly filled inside the rectification box.

[0012] Preferably, the second rectification structure further includes a cover plate and limiting protrusions. The rectifier box has a feed inlet on the side opposite to the opening of the rectifier outer cylinder. Two circumferentially evenly distributed grooves are formed on the inner cylindrical surface of the feed inlet. The cover plate is coaxially aligned with the feed inlet and is located between the feed inlets. Two circumferentially evenly distributed limiting protrusions are fixedly connected to one end of the outer cylindrical surface of the cover plate near the inside of the rectifier box. The limiting protrusions correspond to the grooves and are snapped together between the rectifier boxes.

[0013] (III) Beneficial Effects

[0014] Compared with the prior art, the present invention provides a zero-oil precision filter, which has the following beneficial effects:

[0015] 1. This zero-oil precision filter has a flow rectification structure added above the filter assembly inside the outer cylinder to rectify the liquid entering the filter, adjust the flow rate and direction, so that the liquid flows into the filter assembly in a uniform direction and with a uniform distribution. When the filter flow rate is uniform, each part of the filter assembly can fully and evenly perform the filtration function.

[0016] 2. This zero-oil precision filter connects the rectifier structure and the outer cylinder via a sliding groove and a slider, facilitating easy disassembly and assembly. The simplified disassembly and assembly process reduces maintenance time and labor costs. In the event of component replacement, disassembly does not damage the main structure such as the outer cylinder, thus saving material costs. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is an exploded view of the structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the rectifier outer cylinder structure of this utility model;

[0020] Figure 4 This is a schematic cross-sectional view of the rectifier structure of this utility model.

[0021] Figure 5 for Figure 4 A magnified view of part A in the diagram.

[0022] In the diagram: 1. Filter outer cylinder; 2. Connecting sealing assembly; 3. Outlet pipe; 4. Rectifying outer cylinder; 5. Inlet pipe; 6. Filter assembly; 7. Conical flow divider; 8. Flow divider hole; 9. Slider one; 10. Cover plate; 11. Limiting protrusion; 12. Rectifying box; 13. Feed inlet; 14. Groove; 15. Filtrate hole; 16. Slider two; 17. Pall ring; 18. Vertical slide groove; 19. Annular slide groove one; 20. Annular slide groove two. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1-5A zero-oil precision filter includes an outer filter cylinder 1, a connecting sealing assembly 2, an outlet pipe 3, a rectifier outer cylinder 4, an inlet pipe 5, and a filter assembly 6. The outlet pipe 3 is fixedly connected to one end of the outer filter cylinder 1 with a reduced diameter, and the inlet pipe 5 is fixedly connected to one end of the rectifier outer cylinder 4 with a reduced diameter. The other end of the rectifier outer cylinder 4 is sealed to the end of the outer filter cylinder 1 opposite to the outlet pipe 3 through the connecting sealing assembly 2. The filter assembly 6 is installed inside the outer filter cylinder 1 corresponding to the rectifier outer cylinder 4. The rectifier outer cylinder 4 is provided with a rectification structure, which includes a first rectification structure and a second rectification structure. The first rectification structure and the second rectification structure are coaxially corresponding to the inlet pipe 5, and the first rectification structure is located between the inlet pipe 5 and the second rectification structure.

[0025] Furthermore, the rectifier outer cylinder 4 has two evenly distributed vertical sliding grooves 18 on its inner cylindrical surface at the end opposite to the opening of the inlet pipe 5. A second annular sliding groove 20 is formed inside the rectifier outer cylinder 4 on the side opposite to the opening of the vertical sliding grooves 18, and the second annular sliding groove 20 is connected to the vertical sliding grooves 18. A first annular sliding groove 19 is formed inside the filter outer cylinder 1 at the middle position of the vertical sliding grooves 18. The first annular sliding groove 19 is located between the second annular sliding groove 20 and the side of the rectifier outer cylinder 4 opposite to the opening of the inlet pipe 5, and it is connected to the vertical sliding grooves 18. The vertical sliding groove 18 is a groove of the rectifier structure, the second annular sliding groove 20 is a slot of the first rectifier structure, and the first annular sliding groove 19 is a slot of the second rectifier structure.

[0026] Furthermore, the first rectification structure includes a conical diverter 7 and a slider 9. The larger diameter end of the conical diverter 7 is fixedly connected to two evenly distributed sliders 9. The sliders 9 correspond to the annular grooves 20 of the rectification outer cylinder 4 and are snapped between the annular grooves 20. The conical diverter 7 is located between the rectification outer cylinders 4, and the cone tip of the conical diverter 7 corresponds to the inlet pipe 5. The conical structure of the conical diverter 7 is used to buffer the part of the liquid with a faster central flow velocity, disperse the liquid, reduce the flow velocity, and make the liquid uniform. The sliders 9 are snapped to the annular grooves 20 and slide between the vertical grooves 18.

[0027] Furthermore, the first rectification structure also includes a diversion hole 8. A set of evenly distributed diversion holes 8 are opened through the bottom surface of the conical diversion member 7. The diversion holes 8 penetrate the bottom surface and conical surface of the entire conical diversion member 7. The diversion holes 8 are used to divert the liquid and disperse a stream of liquid. Each time the liquid passes through a diversion hole 8, part of the liquid continues to flow through the conical diversion member 7, and part of the liquid enters the diversion hole 8. When the liquid flows to the bottom of the conical diversion member 7, there is very little liquid left.

[0028] Furthermore, the second rectification structure includes a rectification box 12, a second slider 16, and a Pall ring 17. Two evenly distributed sliders 16 are fixedly connected to the outer cylindrical surface of the rectification box 12. The second slider 16 corresponds to the annular groove 19 of the outer rectification cylinder 4 and is snapped between the annular groove 19. A set of evenly distributed filtrate holes 15 are opened through both symmetrical planes of the rectification box 12. A set of Pall rings 17 are randomly filled inside the rectification box 12. The second slider 16 is used to snap into the annular groove 19 and slides between the vertical grooves 18. The filtrate holes 15 are used for liquid to pass through. The holes and bent inner ribs on the Pall ring 17 change the direction and velocity of the liquid. The liquid in the micro-units has different flow directions and velocities, and finally, they work together to achieve a macroscopically uniform state.

[0029] Furthermore, the second rectification structure also includes a cover plate 10 and limiting protrusions 11. The rectifier box 12 has a feed inlet 13 through it on the side opposite to the opening of the rectifier outer cylinder 4. Two circumferentially evenly distributed grooves 14 are formed on the inner cylindrical surface of the feed inlet 13. The cover plate 10 is coaxially aligned with the feed inlet 13 and is located between the feed inlets 13. Two circumferentially evenly distributed limiting protrusions 11 are fixedly connected to one end of the outer cylindrical surface of the cover plate 10 near the inside of the rectifier box 12. The limiting protrusions 11 correspond to the grooves 14 and are snapped together between the rectifier boxes 12. The feed inlet 13 is used to insert a Pall ring 17. The groove 14 is a sliding groove for the limiting protrusions 11. The cover plate 10 is used to cover the feed inlet 13 to prevent the Pall ring 17 from falling off. The limiting protrusions 11 are inserted from the grooves 14 and snapped together between the rectifier boxes 12.

[0030] Working principle: The liquid to be filtered is introduced through the inlet pipe 5. The liquid passes through the conical diverter 7, and due to its own gravity, it disperses and flows down the slope of the conical diverter 7. The liquid gradually disperses through the diversion holes 8 on the conical diverter 7, flowing down from each hole. A small amount of remaining liquid flows down from the gap between the conical diverter 7 and the outer filter cylinder 1. The liquid flowing out of the diversion holes 8 after passing through the conical diverter 7 has been divided into uniform and dense small streams. The liquid continues to flow from the filtrate hole 15 into the rectifier box 12. After being rectified by the Pall rings 17 in the rectifier box 12, the liquid changes its flow direction within the Pall rings 17. The flow rate gradually decreases and becomes uniform. The liquid flows down from the filtrate hole 15 through the Pall ring 17 and flows evenly into the filter assembly 6. After being filtered by the filter assembly 6, it flows out from the outlet pipe 3, completing the entire filtration process. When inspecting the filter, disconnect the connecting sealing assembly 2 to inspect the filter assembly 6 inside the filter outer cylinder 1, and then install the filter assembly 6 back into the filter outer cylinder 1. Manually operate the rectifier box 12 to rotate the slider 16 between the annular slide grooves 19. When the slider 16 rotates to the position of the vertical slide groove 18, slide the slider 16 between the vertical slide grooves 18 until the rectifier box 12 is pulled out. When rotating the cover plate 10 causes the limiting protrusion 11 to rotate to the position of the groove 14, slide the limiting protrusion 11 between the grooves 14 until the cover plate 10 is removed. Take out the Pall ring 17 from the feed inlet 13 in the rectifier box 12, and then install a new Pall ring 17. Slide the limiting protrusion 11 from the groove 14 until the groove 14 is inside the rectifier box 12. Rotate the limiting protrusion 11 to lock the groove 14 into the rectifier box 12, completing the maintenance of the second rectifier structure. Manually operate the rotating conical diverter 7 to rotate the slider 9 between the annular grooves 20. When the slider 9 rotates to the position of the vertical groove 18, move the slider 9... Slide the new conical diverter 7 between the vertical slide grooves 18 until it is pulled out. Slide the slider 9 of the new conical diverter 7 into the vertical slide groove 18 at the opening end of the rectifier outer cylinder 4 until it reaches the position of the annular slide groove 20. Rotate the conical diverter 7 to engage the slider 9 between the annular slide grooves 20. Then slide the slider 16 of the new rectifier box 12 into the vertical slide groove 18 at the opening end of the rectifier outer cylinder 4 until it reaches the position of the annular slide groove 19. Rotate the slider 16 to engage the slider 16 between the annular slide grooves 19. The rectifier structure assembly is completed. Finally, the rectifier outer cylinder 4 and the filter outer cylinder 1 are sealed together by the connecting sealing assembly 2.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A zero-oil precision filter, comprising a filter outer cylinder (1), a connecting sealing assembly (2), an outlet pipe (3), a rectifier outer cylinder (4), an inlet pipe (5), and a filter assembly (6), wherein the outlet pipe (3) is fixedly connected to one end of the filter outer cylinder (1) with a changing diameter, the inlet pipe (5) is fixedly connected to one end of the rectifier outer cylinder (4) with a changing diameter, and the other end of the rectifier outer cylinder (4) is sealed to the end of the filter outer cylinder (1) away from the outlet pipe (3) through the connecting sealing assembly (2), and a filter assembly (6) is installed inside the filter outer cylinder (1) corresponding to the rectifier outer cylinder (4), characterized in that: The rectifier outer cylinder (4) is provided with a rectifier structure, which includes a first rectifier structure and a second rectifier structure. The first rectifier structure and the second rectifier structure are coaxially aligned with the inlet pipe (5), and the first rectifier structure is located between the inlet pipe (5) and the second rectifier structure.

2. The zero-oil precision filter according to claim 1, characterized in that: The rectifier outer cylinder (4) has two evenly distributed vertical sliding grooves (18) on its inner cylindrical surface at the end opposite to the opening of the inlet pipe (5). The rectifier outer cylinder (4) has an annular sliding groove two (20) on the side opposite to the opening of the vertical sliding groove (18). The annular sliding groove two (20) is connected to the vertical sliding groove (18). The filter outer cylinder (1) has an annular sliding groove one (19) in the middle position of the vertical sliding groove (18). The annular sliding groove one (19) is in the middle of the annular sliding groove two (20) and the side of the rectifier outer cylinder (4) opposite to the opening of the inlet pipe (5). The annular sliding groove one (19) is connected to the vertical sliding groove (18).

3. The zero-oil precision filter according to claim 2, characterized in that: The first rectification structure includes a conical diverter (7) and a slider (9). The larger diameter end of the conical diverter (7) is fixedly connected to two evenly distributed sliders (9). The sliders (9) correspond to the annular grooves (20) of the rectification outer cylinder (4) and the sliders (9) are snapped between the annular grooves (20). The conical diverter (7) is between the rectification outer cylinder (4) and the cone tip of the conical diverter (7) corresponds to the inlet pipe (5).

4. The zero-oil precision filter according to claim 3, characterized in that: The first rectification structure also includes a diversion hole (8). A set of evenly distributed diversion holes (8) are opened through the bottom surface of the conical diversion component (7). The diversion holes (8) penetrate the bottom surface and conical surface of the entire conical diversion component (7).

5. The zero-oil precision filter according to claim 2, characterized in that: The second rectification structure includes a rectification box (12), a second slider (16), and a Pall ring (17). Two evenly distributed sliders (16) are fixedly connected to the outer cylindrical surface of the rectification box (12). The second slider (16) corresponds to the annular groove (19) of the outer cylinder (4) of the rectification box, and the second slider (16) is snapped between the annular groove (19). A set of evenly distributed filtrate holes (15) are opened through both symmetrical planes of the rectification box (12). A set of Pall rings (17) is randomly filled inside the rectification box (12).

6. The zero-oil precision filter according to claim 5, characterized in that: The second rectification structure also includes a cover plate (10) and a limiting protrusion (11). The rectifier box (12) has a feed inlet (13) through it on the side away from the opening of the rectifier outer cylinder (4). Two circumferentially evenly distributed grooves (14) are opened on the inner cylindrical surface of the feed inlet (13). The cover plate (10) is coaxially corresponding to the feed inlet (13) and the cover plate (10) is between the feed inlets (13). Two circumferentially evenly distributed limiting protrusions (11) are fixedly connected to one end of the outer cylindrical surface of the cover plate (10) near the inside of the rectifier box (12). The limiting protrusions (11) correspond to the grooves (14) and are snapped together between the rectifier boxes (12).

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