Air prefilter convenient to disassemble

Abstract

The utility model discloses a kind of air prefilter convenient to disassemble and assemble, it is related to air prefilter technical field, including bottom plate, the upper end surface axial position of bottom plate is integrally formed and is provided with connecting pipe, the top bolt of connecting pipe is installed with baffle, the axis of the upper end surface of bottom plate around connecting pipe is evenly provided with multiple through holes, the position of baffle on corresponding through hole is all provided with threaded hole, the inside of threaded hole is all threadedly installed with inner cyclone tube, the bottom end outside of inner cyclone tube is equipped with helical flow guide vane, outer cyclone tube is inserted and is installed in through hole, the bottom end of inner cyclone tube is together with helical flow guide vane and the inside of outer cyclone tube is inserted and is matched. Unload the screw of baffle fixed on connecting pipe, whole baffle assembly can be lifted, then specific inner cyclone tube and its associated outer cyclone tube that need to be replaced can be directly screwed down. Realize the individualization maintenance of cyclone tube, when partial blockage or damage occurs, entire prefilter module or disassembly all normal working cyclone tube is not needed to be replaced.

Description

Technical Field

[0001] This utility model relates to the field of air pre-filter technology, and more specifically, to an air pre-filter that is easy to disassemble and assemble. Background Technology

[0002] Installing an air pre-filter in the intake system can significantly reduce the amount of dust and impurities entering equipment and engines, greatly extending their lifespan, providing strong protection for the engine, improving engine performance, and reducing maintenance costs. In commonly used cyclone tube type air pre-filters, air enters the cyclone tube through the pre-filter's inlet. After passing through the cyclone tube's filtration, a large amount of dust, powder, and grit are filtered out due to centrifugal force and then enter a collection device for storage. The filtered air then passes through the inner tube of the cyclone tube into the clean air outlet for subsequent use.

[0003] Existing air pre-filters often use a one-piece injection-molded structure for the cyclone tubes, which are fixedly connected to the upper and lower baffles. This rigid integrated design reveals its shortcomings in actual maintenance. When a single cyclone tube becomes clogged due to impurities or suffers physical damage, maintenance personnel cannot perform targeted replacements because the tube body cannot be disassembled independently. The entire cyclone tube assembly, along with the upper and lower baffles, must be disassembled and replaced as a single module. This "one-for-all" maintenance mode not only significantly increases the cost of replacing spare parts and wastes usable cyclone tubes, but also makes the maintenance process cumbersome, time-consuming, and labor-intensive, reducing the convenience and economy of maintenance work. Therefore, an air pre-filter that is easy to disassemble and assemble is needed. Utility Model Content

[0004] Technical problems to be solved In view of the problems existing in the prior art, the present invention provides an air pre-filter that is easy to disassemble and assemble, so as to solve the problems mentioned in the background art.

[0005] (II) Technical Solution To achieve the above objectives, this utility model provides the following technical solution: an air pre-filter that is easy to assemble and disassemble, comprising a base plate, a connecting pipe integrally formed at the axial position of the upper end face of the base plate, a partition plate bolted to the top end of the connecting pipe, multiple through holes evenly formed around the axis of the connecting pipe on the upper end face of the base plate, threaded holes formed at the corresponding positions of the through holes on the partition plate, an inner vortex tube threadedly installed inside the threaded holes, a spiral guide vane sleeved on the outer side of the bottom end of the inner vortex tube, an outer vortex tube inserted into the through holes, the bottom end of the inner vortex tube and the spiral guide vane both being inserted into the inner vortex tube; an outer cover sleeved on the top end of the base plate corresponding to the outer side of the partition plate, a number of strip-shaped air inlet grooves evenly formed on the outer wall of the outer cover; a dust collection box detachably installed at the bottom end of the base plate; a snap-fit ​​assembly provided between the dust collection box and the outer cover.

[0006] The present invention is further configured such that mounting columns are fixedly installed on both sides of the top end of the connecting pipe, and screws are movably inserted into both sides of the inner hole of the partition, with the screws threadedly connected to the mounting columns.

[0007] The present invention is further configured such that the ash collection box is crescent-shaped, and the two ash collection boxes are respectively located on both sides of the bottom end of the base plate, and each ash collection box is provided with a ash cleaning port at the bottom end.

[0008] The present invention is further configured such that the snap-fit ​​assembly includes a buckle and a fixing hook. Multiple buckles are fixedly installed on the outer wall of the ash collection box, and a fixing hook is fixedly installed at the bottom of the outer wall of the outer cover corresponding to the buckle position. The buckle and the fixing hook are snap-fitted together.

[0009] The present invention is further configured such that an air inlet pipe is fixedly installed on the lower end face of the base plate, and a clamp is fitted on the outside of the air inlet pipe.

[0010] The present invention is further configured such that a plurality of first connecting seats are uniformly fixedly installed on the outer edge of the upper end face of the base plate, and a second connecting seat is installed on the bottom end of the side wall of the outer cover at the position corresponding to the first connecting seat, and the first connecting seat and the second connecting seat are bolted together.

[0011] (III) Beneficial Effects Compared with the prior art, this utility model provides an air pre-filter that is easy to disassemble and assemble, and has the following beneficial effects: 1. This easily detachable air pre-filter features an inner cyclone tube threaded onto a partition plate and an outer cyclone tube inserted into a through-hole in the base plate. When a single cyclone tube becomes clogged, maintenance is as simple as opening the outer cover, removing the screws securing the partition plate to the connecting pipe, and lifting the entire partition plate assembly. The specific inner cyclone tube and its associated outer cyclone tube that need replacement can then be directly unscrewed. This allows for individualized maintenance of the cyclone tubes. In the event of partial blockage or damage, it is not necessary to replace the entire pre-filter module or disassemble all normally functioning cyclone tubes, thus saving on spare parts costs, simplifying the operation process, and making maintenance targeted, convenient, and efficient.

[0012] 2. This easily detachable air pre-filter features crescent-shaped dust collection boxes located on both sides of the bottom of the base plate, and a snap-fit ​​assembly consisting of fasteners and hooks connecting the dust collection boxes to the outer cover. When cleaning accumulated dust, operators can easily release the snap-fit ​​mechanism by hand, allowing the entire dust collection box to be quickly removed from the main body and emptied and cleaned through the bottom cleaning port. This makes routine dust cleaning exceptionally simple and quick, ensuring thorough cleaning of the dust collection boxes and guaranteeing the pre-filter's continuous and stable performance. Attached Figure Description

[0013] Figure 1This is a schematic diagram of the structure from the front view of this utility model; Figure 2 This is a schematic diagram of the bottom structure of this utility model; Figure 3 This is a schematic diagram of the internal structure of this utility model; Figure 4 This is a schematic diagram of the disassembled structure of this utility model.

[0014] Reference numerals: 1. Base plate; 2. Connecting pipe; 3. Partition plate; 4. Through hole; 5. Threaded hole; 6. Inner vortex tube; 7. Spiral guide vane; 8. Outer vortex tube; 9. Ash collection box; 10. Outer cover; 11. Strip-shaped air inlet slot; 12. Assembly column; 13. Screw; 14. Fastener; 15. Fixing hook; 16. Ash cleaning port; 17. Air inlet pipe; 18. Clamp; 19. First connecting seat; 20. Second connecting seat. Detailed Implementation

[0015] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0016] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0017] In this utility model, unless otherwise stated, the orientations used, such as "up" and "down", usually refer to the direction shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0018] Please see Figures 1-4 An easily detachable air pre-filter includes a base plate 1, with a connecting pipe 2 integrally formed at the axial position of the upper end face of the base plate 1. A partition plate 3 is bolted to the top of the connecting pipe 2; specifically, mounting posts 12 are fixedly installed on both sides of the top of the connecting pipe 2, and screws 13 are movably inserted into both sides of the inner hole of the partition plate 3, with the screws 13 threadedly connected to the mounting posts 12. Multiple through holes 4 are evenly distributed around the axis of the connecting pipe 2 on the upper end face of the base plate 1, and threaded holes 5 are formed on the partition plate 3 corresponding to the positions of the through holes 4. The modular assembly and separation of the core components are achieved by bolting the partition plate 3 to the base plate 1, laying the foundation for independent maintenance of the subsequent cyclone tube.

[0019] The cyclone tube assembly includes an inner cyclone tube 6 and an outer cyclone tube 8. The inner cyclone tube 6 is threadedly installed inside the threaded holes 5. A spiral guide vane 7 is fitted onto the outer side of the bottom end of the inner cyclone tube 6. The outer cyclone tube 8 is inserted into the through holes 4. The bottom end of the inner cyclone tube 6, along with the spiral guide vane 7, is inserted into the inner cyclone tube 8. The inner cyclone tube 6 is threadedly connected to the partition plate 3, while the outer cyclone tube 8 is inserted into the base plate 1. This allows each cyclone tube to be independently installed and removed, eliminating the need to replace the entire module in case of blockage or damage, significantly reducing maintenance costs and operational complexity.

[0020] The outer casing and dust collection section include an outer cover 10 and a dust collection box 9. The outer cover 10 is fitted onto the top of the base plate 1, corresponding to the outer side of the partition 3. Several strip-shaped air inlet slots 11 are evenly distributed on the outer wall of the outer cover 10. A dust collection box 9 is detachably installed at the bottom of the base plate 1. The dust collection box 9 is crescent-shaped, with two dust collection boxes 9 respectively located on both sides of the bottom of the base plate 1. Each dust collection box 9 has a cleaning port 16 at its bottom. A snap-fit ​​assembly is provided between the dust collection box 9 and the outer cover 10. This assembly includes a latch 14 and a fixing hook 15. Multiple latches 14 are fixedly installed on the outer wall of the dust collection box 9, and fixing hooks 15 are fixedly installed at the bottom of the outer wall of the outer cover 10 corresponding to the positions of the latches 14. The latches 14 and fixing hooks 15 engage in a snap-fit ​​connection. The strip-shaped air intake slot 11 improves air intake efficiency; the crescent-shaped double dust collection box 9 design increases dust collection capacity and is easy to adapt to the structure; the snap-fit ​​assembly enables quick disassembly and assembly of the dust collection box 9, making the dust cleaning operation more convenient and thorough.

[0021] An intake pipe 17 is fixedly installed on the lower end face of the base plate 1, and a clamp 18 is fitted on the outside of the intake pipe 17 for connecting the engine filter. Multiple first connecting seats 19 are evenly fixedly installed on the outer edge of the upper end face of the base plate 1. Second connecting seats 20 are installed on the bottom side wall of the outer cover 10 at positions corresponding to the first connecting seats 19, and the first connecting seats 19 and second connecting seats 20 are bolted together. The clamp 18 ensures a reliable connection to the engine piping; the bolted connection between the first connecting seats 19 and the second connecting seats 20 ensures the stability of the connection between the outer cover 10 and the base plate 1, while also facilitating disassembly for internal maintenance.

[0022] When the entire device is in use: the air pre-filter is reliably connected to the filter of the engine intake system through the intake pipe 17 at the lower end of its base plate 1 and by means of clamp 18. The intake negative pressure generated when the engine is running forms a strong suction force, which drives the outside air to first pass through the evenly distributed strip-shaped intake slots 11 on the outer wall of the outer cover 10. This slot design can effectively improve the initial intake efficiency compared with the traditional round hole.

[0023] After entering the cavity enclosed by the outer casing 10 and the base plate 1, the air flows to each vortex tube assembly under the action of pressure difference, and enters the outer vortex tube 8 through the channel formed by the spiral guide vanes 7 fixed to the bottom of the inner vortex tube 6. Under the precise guidance of the spiral guide vanes 7, the originally axially flowing gas is forced into a high-speed rotating vortex. Based on the principle of centrifugal force, larger dust, gravel and other impurities carried in the air are thrown towards and adhere to the inner wall of the outer vortex tube 8, and finally fall along the tube wall under the push of gravity and subsequent airflow, and enter the dust collection box 9 installed at the bottom through the through hole 4 on the base plate 1 for collection. At the same time, the clean air after centrifugal purification is guided by the low pressure zone formed in the center of the vortex, flows in the opposite direction through the passage in the center of the spiral guide vanes 7, enters the clean chamber formed by the partition 3, the connecting pipe 2 and the upper part of the inner vortex tube 6, and finally converges and is output through the intake pipe 17 to supply the downstream engine filter for further fine filtration.

[0024] When individual inner cyclone tubes 6 or outer cyclone tubes 8 become clogged or damaged due to impurities and require maintenance, the maintenance personnel can first remove the bolts connecting the first connecting seat 19 and the second connecting seat 20, remove the outer cover 10, and then unscrew the screws 13 connecting the partition plate 3 and the mounting column 12. The entire partition plate 3 module can then be removed from the connecting tube 2. At this point, the operator can directly unscrew the specific clogged inner cyclone tube 6 from the corresponding threaded hole 5 of the partition plate 3 for replacement or cleaning. This process is completely independent and does not require disturbing other intact cyclone tubes, greatly simplifying maintenance operations.

[0025] To clean the ash collection box 9, simply operate the buckle 14 installed on the outer wall of the ash collection box 9 to disengage it from the fixing hook 15 fixed to the bottom outer wall of the outer cover 10. The crescent-shaped ash collection box 9 can then be easily removed and thoroughly cleaned through the cleaning port 16 at its bottom, thereby maintaining the continuous and efficient operation of the pre-filter.

[0026] Of all the solutions mentioned above, those involving the connection between two components can be selected according to the actual situation, such as welding, bolt and nut connection, bolt or screw connection, or other known connection methods, which will not be elaborated here. For all the fixed connections mentioned above, welding is preferred. Although embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this utility model. The scope of this utility model is defined by the appended claims and their equivalents.

Claims

1. An air pre-filter that is easy to assemble and disassemble, comprising a base plate (1), wherein a connecting pipe (2) is integrally formed at the axial position of the upper end face of the base plate (1), a partition plate (3) is bolted to the top end of the connecting pipe (2), and a plurality of through holes (4) are evenly opened around the axis of the connecting pipe (2) on the upper end face of the base plate (1). Threaded holes (5) are opened on the partition plate (3) at the positions corresponding to the through holes (4), and an inner vortex tube (6) is threadedly installed inside the threaded hole (5). A sleeve is fitted on the outer side of the bottom end of the inner vortex tube (6). A spiral guide vane (7) is inserted into the through hole (4) and an outer vortex tube (8) is installed inside it. The bottom end of the inner vortex tube (6) and the spiral guide vane (7) are inserted into the inner vortex tube (8). The top of the base plate (1) is fitted with an outer cover (10) corresponding to the outer side of the partition plate (3). Several strip-shaped air inlet grooves (11) are evenly opened on the outer wall of the outer cover (10). A dust collection box (9) is detachably installed at the bottom end of the base plate (1). A snap-fit ​​assembly is provided between the dust collection box (9) and the outer cover (10).

2. The easily detachable air pre-filter according to claim 1, characterized in that: The top two sides of the connecting pipe (2) are fixedly installed with assembly columns (12), and the inner holes of the partition plate (3) are movably inserted with screws (13), and the screws (13) are threadedly connected to the assembly columns (12).

3. The easily detachable air pre-filter according to claim 1, characterized in that: The ash collection box (9) is crescent-shaped, and the two ash collection boxes (9) are respectively located on both sides of the bottom end of the base plate (1). Each ash collection box (9) has a cleaning port (16) at its bottom end.

4. An easily detachable air pre-filter according to claim 1, characterized in that: The snap-fit ​​assembly includes a buckle (14) and a fixing hook (15). Multiple buckles (14) are fixedly installed on the outer wall of the ash collection box (9). The fixing hook (15) is fixedly installed at the bottom of the outer wall of the outer cover (10) at the position corresponding to the buckle (14). The buckle (14) and the fixing hook (15) are snap-fitted together.

5. An easily detachable air pre-filter according to claim 1, characterized in that: An air inlet pipe (17) is fixedly installed on the lower end face of the base plate (1), and a clamp (18) is fitted on the outside of the air inlet pipe (17).

6. An easily detachable air pre-filter according to claim 1, characterized in that: Multiple first connecting seats (19) are evenly fixedly installed on the outer edge of the upper end face of the base plate (1). Second connecting seats (20) are installed at the bottom of the side wall of the outer cover (10) at the positions corresponding to the first connecting seats (19). The first connecting seats (19) and the second connecting seats (20) are bolted together.

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