A removable and maintainable prefilter

Abstract

This utility model relates to the field of engine intake technology and discloses a maintenance-free pre-filter, including a housing, a rainproof intake assembly, a filter assembly, and a dust collection and maintenance assembly. The rainproof intake assembly includes a rain cap and an intake mesh for rain protection and pre-filtration. The filter assembly includes multiple cyclone tubes for solid-gas separation. The dust collection and maintenance assembly includes a dust collection chamber and a dust discharge cover for easy dust collection and cleaning. This utility model, through its detachable design, achieves maintenance-free operation, improves cleaning efficiency, extends the service life of the air filter, and reduces maintenance costs.

Description

Technical Field

[0001] This utility model relates to the field of engine intake technology, specifically a maintenance-free pre-filter. Background Technology

[0002] Engines require a large amount of air for combustion. In harsh environments, the outside air contains a significant amount of dust and impurities. To prevent these dust and impurities from entering the engine and causing cylinder wear, an air filter is typically installed in the engine's intake system. This filter element filters the incoming air. However, if the filter element accumulates too much dust and impurities during the filtration process, it will cause a continuous increase in intake resistance, necessitating timely maintenance and replacement. Frequent maintenance leads to equipment downtime and increases costs.

[0003] Therefore, existing engine intake systems install various types of pre-filters before the air filter to pre-filter the air entering the air filter. Pre-filters can remove a large amount of dust and impurities, keeping the air filter clean for longer periods, thus making the engine run more powerfully. At the same time, they can also extend the lifespan of the filter element in the air filter, reducing replacement frequency and lowering engine maintenance costs.

[0004] Common air pre-filters typically come in two types: rotor and stationary. Rotary pre-filters use a rotating element for separation, while stationary pre-filters use multiple parallel swirling tubes to separate dust and impurities in the air. Pre-filters are usually used in outdoor environments, so they need to have a protective structure on the outside while ensuring normal air intake. This serves two purposes: firstly, to perform preliminary filtration of large particles, and secondly, to provide rain protection.

[0005] However, existing protective structures are prone to clogging during the initial filtration process, often adsorbing large particles of impurities such as weeds and dead leaves on their surface, making it difficult to meet the increasingly demanding working requirements of the engine intake system.

[0006] Meanwhile, existing air pre-filters are not easy to clean. Due to the complex structure of the dust collection components, they are not only inconvenient to operate, but also difficult to clean thoroughly. This makes it impossible to complete maintenance work quickly and efficiently, increasing the maintenance time for equipment operators and seriously affecting work efficiency.

[0007] In view of this, this technical solution designs a maintenance-free pre-filter. Utility Model Content

[0008] The purpose of this invention is to provide a maintenance-free pre-filter to solve the problems mentioned in the background art.

[0009] To achieve the above objectives, this utility model provides the following technical solution: A non-disassembly, maintainable pre-filter includes a housing. The upper part of the housing contains a filter assembly and a rainproof air intake assembly, while the lower part contains a dust collection and maintenance assembly. The rainproof air intake assembly protects against rainwater while pre-filtering the incoming air, then transferring the gas to the filter assembly for further filtration. Dust generated during filtration is temporarily stored in the dust collection and maintenance assembly under gravity. A vertically distributed central tube is located in the middle of the housing, with an outlet pipe connected to its bottom end. The outlet pipe is detachably connected to the intake passage of the engine to be connected, allowing filtered air to be input into the engine. The top of the central tube connects to an intake chamber located between the filter assembly and the rainproof air intake assembly. Simultaneously, the top of the central tube connects to the intake chamber. Thus, after the air entering through the rainproof air intake assembly is filtered by the filter assembly, the gas rises into the intake chamber, while the dust falls into the dust collection and maintenance assembly. The gas in the intake chamber then continues to be transmitted backward through the central tube and the outlet pipe.

[0010] Compared with the prior art, the beneficial effects of this utility model are: through the design of the rain cap and air intake mesh, rainwater is effectively prevented from entering, while large particulate impurities are pre-filtered, reducing the risk of clogging.

[0011] The filtration system uses a top-outlet air and bottom-outlet dust removal mode through a cyclone tube to efficiently separate dust and air, thereby improving filtration efficiency.

[0012] The dust collection bin uses an inverted V-shaped structure, which facilitates the centralized storage of dust and allows for easy cleaning through the dust discharge cover, achieving maintenance-free operation.

[0013] The pre-filter features a detachable overall structure, with components such as the rain cap, air inlet mesh, and cyclone tube easily installed and removed, simplifying maintenance and reducing equipment downtime. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of a maintenance-free pre-filter.

[0015] Figure 2 This is a cross-sectional structural diagram of a maintenance-free pre-filter.

[0016] Figure 3 This is a schematic diagram of the cyclone tube in a non-disassembly, maintainable pre-filter.

[0017] Figure 4 for Figure 2 A magnified structural diagram of A in the middle.

[0018] Figure 5 for Figure 2 A magnified structural diagram of B in the diagram.

[0019] Figure 6 for Figure 2 A magnified structural diagram of C.

[0020] Figure 7 This is a partial structural diagram of a maintenance-free pre-filter.

[0021] The components include: wire clip 1, housing 10, rain cap 11, air inlet mesh 12, air outlet pipe 13, clamp 14, central pipe 15, air inlet chamber 16, dust collection bin 17, dust discharge cover 18, swirl tube 19, upper perforated plate 20, conical bottom cylinder 21, cylindrical top cylinder 22, swirl plate 23, retaining ring 24, "h" type retaining seat 25, L type retaining plate 26, fastening bolt 27, threaded hole 28, lower perforated plate 29, and air inlet 30. Detailed Implementation

[0022] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0023] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0026] Please see Figures 1-7A non-disassembly, maintainable pre-filter includes a housing 10. The upper part of the housing 10 is equipped with a filter assembly and a rainproof air intake assembly, while the lower part is equipped with a dust collection and maintenance assembly. The rainproof air intake assembly not only protects against rainwater but also pre-filters the incoming air, transferring the air to the filter assembly for further filtration. Dust generated during filtration is temporarily stored in the dust collection and maintenance assembly under gravity. A vertically distributed central pipe 15 is located in the center of the housing 10, with its bottom end connected to an outlet. The air pipe 13 and the exhaust pipe 13 are detachably connected to the engine intake passage to be connected, and are used to input filtered air into the engine to be used. The top of the central pipe 15 is connected to the intake chamber 16 located between the filter assembly and the rainproof intake assembly. At the same time, the top of the central pipe 15 is connected to the intake chamber 16. That is, after the air input through the rainproof intake assembly is filtered by the filter assembly, the gas is transferred upward to the intake chamber 16, and the dust is transferred downward to the dust collection and maintenance assembly. Then the gas in the intake chamber 16 continues to be transmitted backward through the central pipe 15 and the exhaust pipe 13.

[0027] Specifically, the rainproof air intake assembly includes a rainproof cap 11 snapped onto the top of the housing 10, and an air intake mesh 12 snapped onto the circumferential outer wall of the middle part of the housing 10. The air intake mesh 12 is connected to a filter assembly located in the middle of the housing 10. The air intake mesh 12 is used to pre-filter the air to be input, that is, to mainly prevent some large particles of impurities from entering the interior of the housing 10. At the same time, the design of the rainproof cap 11 provides rainproof and waterproof functions. Preferably, a plurality of drainage holes are evenly provided on the housing 10 corresponding to the bottom inner side of the air intake grid 12, so as to automatically discharge the liquid input along the air intake grid 12 to the outside in a timely manner. The filter assembly includes an upper perforated plate 20 and a lower perforated plate 29 arranged longitudinally and parallel between the air inlet grid 12 and the central tube 15. Multiple cyclone tubes 19 are evenly installed between the upper perforated plate 20 and the lower perforated plate 29. The top end of the cyclone tube 19 extends into the air inlet chamber 16 and the bottom end extends into the dust collection and maintenance assembly. An air inlet 30 is provided in the middle of the cyclone tube 19 for the input of gas. That is, the gas that has been pre-filtered by the air inlet grid 12 is transferred to the vicinity of the cyclone tube 19 and then enters the interior of the cyclone tube 19 along the air inlet 30 for fine filtration, that is, solid-gas separation. Specifically, the cyclone tube 19 includes a conical bottom cylinder 21, a cylindrical top cylinder 22, and a cyclone plate 23. The cylindrical top cylinder 22 is fitted inside the conical bottom cylinder 21. Both the conical bottom cylinder 21 and the cylindrical top cylinder 22 are configured as through structures. The cyclone plate 23 is located inside the air inlet 30 and is used to separate solids from gas in the input air. The cyclone plate 23 consists of multiple arc-shaped plates distributed at equal intervals along a ring. Under the guidance of the arc-shaped plates, dust and solids flow downward along the inside of the conical bottom cylinder 21, while gas flows upward along the bottom of the cylindrical top cylinder 22. This achieves the filtration mode of upward air outlet and downward dust discharge inside the cyclone tube 19. Meanwhile, retaining rings 24 are installed on the outer side of the bottom of the conical bottom cylinder 21 and the outer side of the top of the cylindrical top cylinder 22. The retaining rings 24 are rotatably installed on the corresponding upper orifice plate 20 and lower orifice plate 29, thus realizing the rotatable design of the cyclone tube 19.

[0028] In this embodiment of the utility model, a ring of "h"-shaped brackets 25 is installed at the outer edge of the conical bottom cylinder 21 and the lower perforated plate 29. The openings of the upper and lower "h"-shaped brackets 25 are distributed opposite to each other, which is used to engage the upper and lower sides of the air intake mesh 12 in the opening of the "h"-shaped brackets 25, thereby realizing the detachable connection between the air intake mesh 12 and the housing 10. At the same time, a sealing gasket is provided in the opening of the "h"-shaped brackets 25 to increase the sealing and stability of the engagement between the air intake mesh 12 and the "h"-shaped brackets 25. Meanwhile, an L-shaped retaining plate 26 is provided around the bottom edge of the rain cap 11. The L-shaped retaining plate 26 is connected to the top of the "h"-shaped retaining seat 25 on the upper perforated plate 20 by a snap-fit, thereby realizing the installation and removal between the rain cap 11 and the top of the housing 10. Similarly, a sealing gasket is also provided at the snap-fit ​​point between the L-shaped retaining plate 26 and the "h"-shaped retaining seat 25 to increase the sealing performance. Meanwhile, the bottom of the "h"-shaped bracket 25 at the lower perforated plate 29 on the lower side is snapped into the top of the corresponding housing 10.

[0029] The dust collection and maintenance component includes a dust collection chamber 17 located inside the housing 10 on the lower side of the lower perforated plate 29. The dust collection chamber 17 is configured with an inverted V-shaped structure, which allows the dust output along the bottom of the conical bottom cylinder 21 to fall into the dust collection chamber 17 and be stored in a centralized manner. Meanwhile, two sets of dust discharge covers 18 are hinged on both sides of the dust collection chamber 17. The dust discharge covers 18 are used to control the opening and closing of the dust collection chamber 17. One end of the dust discharge cover 18 is fastened to the outside of the bottom of the housing 10 by a steel wire buckle 1, which makes it easy to control the opening and closing of the dust discharge cover 18.

[0030] In one embodiment of this utility model, the mesh size of the air intake mesh 12 can be determined according to the actual application scenario, so as to maximize the filtration range and effect of large particulate impurities. Fasteners are provided at the connection points of the upper perforated plate 20, the lower perforated plate 29 and the outer circumferential wall of the central tube 15. The fasteners are used to detachably and securely connect the upper perforated plate 20, the lower perforated plate 29 and the central tube 15. The fastener includes an extension ring plate installed on the outer wall of the central tube 15. The extension ring plate and the corresponding upper hole plate 20 and lower hole plate 29 are provided with multiple uniform through threaded holes 28. Fastening bolts 27 are threadedly connected in the threaded holes 28. That is, the installation and removal between the upper hole plate 20, the lower hole plate 29 and the central tube 15 are controlled by the threaded connection of the fastening bolts 27 in the threaded holes 28.

[0031] In a preferred embodiment of this utility model, the bottom of the exhaust pipe 13 is detachably connected to the engine's intake pipe via a clamp 14.

[0032] It should be understood that in this application, all rotating, sliding, meshing, belt-driven and other moving parts are well lubricated and not prone to slippage or wear, and each part is provided with a corresponding protective shell. However, in the accompanying drawings of this application, the connection state of each moving part is not shown. It should also be understood that all parts in this application are made of metal or plastic materials with suitable strength in the relevant field to ensure that their structural rigidity meets the actual requirements.

[0033] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A maintenance-free pre-filter, characterized in that, Includes a housing (10); the upper part of the housing (10) is provided with a filter assembly and a rainproof air intake assembly, and the lower part is provided with a dust collection and maintenance assembly; a vertically distributed central tube (15) is provided in the middle of the housing (10), the bottom end of the central tube (15) is connected to an air outlet pipe (13), the air outlet pipe (13) is detachably connected to the engine air intake passage to be connected, the top of the central tube (15) is connected to the air intake chamber (16) opened between the filter assembly and the rainproof air intake assembly, and the top of the central tube (15) is connected to the air intake chamber (16).

2. The maintenance-free pre-filter according to claim 1, characterized in that, The rainproof air intake assembly includes a rainproof cap (11) snapped onto the top of the housing (10) and an air intake mesh (12) snapped onto the circumferential outer wall of the middle part of the housing (10). The interior of the air intake mesh (12) is connected to a filter assembly located in the middle of the housing (10).

3. The maintenance-free pre-filter according to claim 2, characterized in that, Multiple drainage holes are evenly provided on the housing (10) corresponding to the bottom inner side of the air intake mesh (12).

4. The maintenance-free pre-filter according to claim 3, characterized in that, The filter assembly includes an upper perforated plate (20) and a lower perforated plate (29) arranged longitudinally and parallel between the air inlet grid (12) and the central tube (15). A plurality of swirling tubes (19) are evenly installed between the upper perforated plate (20) and the lower perforated plate (29). The top end of the swirling tube (19) extends into the air inlet chamber (16) and the bottom end extends into the dust collection and maintenance assembly. An air inlet (30) is provided in the middle of the swirling tube (19).

5. A maintenance-free pre-filter according to claim 4, characterized in that, The swirl tube (19) includes a conical bottom cylinder (21), a cylindrical top cylinder (22), and a swirl plate (23); the cylindrical top cylinder (22) is fitted inside the conical bottom cylinder (21), and both the conical bottom cylinder (21) and the cylindrical top cylinder (22) are configured as a through structure. The swirl plate (23) is located inside the air inlet (30), and the swirl plate (23) is composed of multiple arc-shaped plates distributed at equal intervals along a ring. A retaining ring (24) is installed on the outer side of the bottom of the conical bottom cylinder (21) and the outer side of the top of the cylindrical top cylinder (22). The retaining ring (24) is rotated and installed on the corresponding upper hole plate (20) and lower hole plate (29).

6. A maintenance-free pre-filter according to claim 5, characterized in that, The conical bottom cylinder (21) and the lower perforated plate (29) are each equipped with a ring of "h"-shaped brackets (25) at their outer edges. The openings of the upper and lower "h"-shaped brackets (25) are distributed opposite to each other, and a sealing gasket is provided inside the opening of the "h"-shaped bracket (25).

7. A maintenance-free pre-filter according to claim 6, characterized in that, The bottom edge of the rain cap (11) is provided with an L-shaped card plate (26). The L-shaped card plate (26) is connected to the top of the "h"-shaped card seat (25) on the upper perforated plate (20) by a snap-fit. The bottom of the "h"-shaped card seat (25) at the lower perforated plate (29) is connected to the top of the corresponding housing (10) by a snap-fit.

8. A maintenance-free pre-filter according to claim 7, characterized in that, The dust collection and maintenance assembly includes a dust collection chamber (17) located inside the housing (10) on the lower side of the lower perforated plate (29). The dust collection chamber (17) is configured as an inverted V-shaped structure. Two sets of dust discharge covers (18) are hinged to both sides of the dust collection chamber (17). One end of the dust discharge cover (18) is fastened to the outside of the bottom of the housing (10) by a wire clip (1).

9. A maintenance-free pre-filter according to claim 8, characterized in that, Fasteners are provided at the connection between the upper hole plate (20), the lower hole plate (29) and the outer circumferential wall of the central tube (15). The fasteners include an extension ring plate installed on the outer wall of the central tube (15). The extension ring plate and the corresponding upper hole plate (20) and lower hole plate (29) are provided with a plurality of uniform through threaded holes (28). Fastening bolts (27) are threaded into the threaded holes (28).

10. A maintenance-free pre-filter according to claim 9, characterized in that, The bottom of the exhaust pipe (13) is detachably connected to the engine's intake pipe via a clamp (14).

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