CN209990567U - Dust exhaust valve structure of air filter - Google Patents

Abstract

The utility model discloses an air cleaner's dust exhaust valve structure sets up in the bottom of collection dirt lid assembly, has seted up the elongated slot in the dust exhaust valve, elongated slot bottom opening and be provided with the dust exhaust lip limit of two rectangular shapes. The utility model discloses a port adopts runway long circle structure on the elongated slot, and cross-sectional area is big, and the dust holding capacity is big, and the dust volume that flows through in the unit interval is big, has improved the dust discharge ability, has prolonged air cleaner's maintenance cycle, has reduced and has maintained the maintenance cost. The length of the dust exhaust lip edge is larger than that of the opening of the long groove, the two outer ends of the dust exhaust lip edge extend outwards for a certain length along the two ends of the long groove in the length direction, so that the two ends of the long groove are sealed by the dust exhaust lip edge, the length of the dust exhaust lip edge is long, the opening of the dust exhaust lip edge is larger when the dust exhaust lip edge is opened, and the dust exhaust capacity is improved.

Description

Dust exhaust valve structure of air filter

Technical Field

The utility model belongs to the technical field of engine air intake system's air cleaner and specifically relates to an air cleaner's dust exhaust valve structure.

Background

The engine is used as a power source of vehicles and engineering mechanical equipment, and the quality of the performance of an air intake system directly influences the power output performance of the engine. The air intake system of the engine mainly comprises a pre-filtering assembly, an air intake pipeline and an air filter. The air filter is a core component of an air inlet system of the engine, and mainly functions to filter out pollutants such as dust, sand and the like in air and provide clean air for the engine.

The desert air filter is a general name of the air filter integrating two large parts of a pre-filtering assembly and an air inlet pipeline of an air inlet system into a shell, and the number of the cyclone pipes of the pre-filtering assembly is more, so that the desert air filter can be applied to vehicles used in severe working conditions with very high dust concentration such as mines, sand and stone plants, desert zones and the like for a long time. The working principle of the desert air filter is as follows: air in the atmospheric environment enters from an air inlet of the desert air filter under the driving of the negative pressure of the engine and passes through the pre-filtering assembly in the shell to be subjected to primary filtering. Dirty outdoor air containing dust and sand generates rotational flow in a rotational flow pipe of the pre-filtering assembly, and the dust and the sand with larger particle size and heavier weight are separated from the air; the cleaner air obtained after the primary filtration is subjected to secondary filtration through the main filter element and the safety filter element in the air filter, dust and the like with smaller particle size and lighter weight are intercepted by the filter elements, and finally the cleaner air is obtained, and the cleaner air is discharged from the air outlet of the cleaner air and enters the engine. With the continuous accumulation of the working time, the number of pollutants filtered by the outer surface of the filter paper of the main filter element of the air filter is increased, and finally the maximum resistance and dust holding capacity allowed by the design of the main filter element are reached, namely the service life of the filter element is reached, and at the moment, the filter element needs to be replaced.

As shown in fig. 1 and 2, the conventional desert air filter is as shown in fig. 1, a main filter element 2, a pre-filtering assembly 3 and a dust collecting cover assembly 5 are sequentially arranged in a housing 1 from top to bottom, an upper cover 31 of the pre-filtering assembly 3 is provided with a plurality of cyclone tubes 32 arranged in an array, the lower ends of the cyclone tubes 32 extend into a cyclone tube sleeve 341, and the lower ends of the cyclone tube sleeve 341 are sleeved on corresponding holes of a lower cover 34. The dust discharge valve 56 having a cylindrical shape is provided at the bottom of the dust collection cover assembly 5, and the opening surface of the lower end valve port of the dust discharge valve 56 has a small flow area, so that clogging is likely to occur in a use environment having a large dust concentration during actual use.

SUMMERY OF THE UTILITY MODEL

The applicant aims at the defects that the opening surface of the dust exhaust valve in the existing desert air filter is small in overflowing area and easy to block, and the like, and provides a dust exhaust valve structure of the air filter with a reasonable structure.

The utility model discloses the technical scheme who adopts as follows:

a dust exhaust valve structure of an air filter is arranged at the bottom of a dust collection cover assembly, an elongated slot is formed in the dust exhaust valve, the bottom of the elongated slot is opened, and two strip-shaped dust exhaust lip edges are arranged on the bottom of the elongated slot.

As a further improvement of the above technical solution:

the upper end opening of the long groove is in a runway shape or an oval shape, and the size in the length direction is 1.5-50 times of the size in the width direction.

The cross section of the long groove is V-shaped, U-shaped or arc-shaped.

The utility model discloses a port adopts runway long circle or oval structure on the elongated slot, and cross-section flow area is big, and the dust holding capacity is big, and the dust volume of flowing through in the unit interval is big, has improved the ash discharge ability, has prolonged air cleaner's maintenance cycle, has reduced and has maintained the maintenance cost.

The two outer ends of the dust exhaust lip extend outwards for a certain length along the length direction of the dust exhaust valve to seal the two end parts of the long groove.

The utility model discloses a length on dust exhaust lip limit is greater than elongated slot open-ended length, and two outer ends on dust exhaust lip limit outwards extend certain length along elongated slot length direction's both ends to guarantee that the dust exhaust lip limit seals the both ends of elongated slot, dust exhaust lip limit length is longer, and the opening when dust exhaust lip limit is opened is bigger, has improved the dust exhaust ability.

Vertical ribs are arranged in the elongated slots.

The utility model discloses an inside a plurality of ribs that are provided with of elongated slot, when inside system's negative pressure was used, the rib can prevent that the dust exhaust valve from being inhaled inside backward, and destroys the leakproofness of inside system, influences filtration efficiency in advance.

The two dust exhaust lip edges are vertically arranged in parallel, a certain gap is arranged between the two lip edges, and the gap is 0.5 mm-2 mm.

The utility model discloses a dust exhaust lip limit is the flexible lip limit of two vertical parallels, is separated by the clearance between two lip limits, and two lip limits are closed when having the negative pressure inside the air cleaner realize sealing to internal system.

The height of the dust removing lip is 5 mm-50 mm, and the thickness of the dust removing lip is 0.5 mm-5 mm.

The utility model discloses a width broad in dust exhaust lip limit, thickness is thinner, and under the negative pressure effect, the laminating area in dust exhaust lip limit is great, can make the closure in dust exhaust lip limit inseparabler, has improved the sealed stability and the reliability of internal system.

The cover body of the dust exhaust valve and the dust collection cover assembly is of an integrated injection molding structure, the dust exhaust valve forms a groove corresponding to the flange edge of the cover body, and the groove wraps the flange edge.

A plurality of cylindrical filling pieces are also formed in the grooves.

The dust exhaust valve uses a flexible material of rubber or thermoplastic elastomer.

The utility model discloses a dust exhaust valve can adopt integrative injection moulding with the lid, and the installation cost can be practiced thrift to the integrated into one piece structure, reduces equipment work, has avoided the installation clearance between the part, improves the leakproofness, and then guarantees the interior prefiltration efficiency of system. The flange limit of lid is wrapped to the recess of dust exhaust valve, and the packing piece in the recess of dust exhaust valve makes recess and flange limit wrap inseparabler, and in the use, the dust exhaust valve is difficult for being dragged off from the lid by external force, has ensured the leakproofness of system, has improved the reliability.

The utility model has the advantages as follows:

the utility model discloses a port adopts runway long circle or oval structure on the elongated slot, and cross-section flow area is big, and the dust holding capacity is big, and the dust volume of flowing through in the unit interval is big, has improved the ash discharge ability, has prolonged air cleaner's maintenance cycle, has reduced and has maintained the maintenance cost. The length of the dust exhaust lip edge is larger than that of the opening of the long groove, the two outer ends of the dust exhaust lip edge extend outwards for a certain length along the two ends of the long groove in the length direction, so that the two ends of the long groove are sealed by the dust exhaust lip edge, the length of the dust exhaust lip edge is long, the opening of the dust exhaust lip edge is larger when the dust exhaust lip edge is opened, and the dust exhaust capacity is improved. The long groove is internally provided with a plurality of ribs, and when the negative pressure of an internal system acts, the ribs can prevent the dust exhaust valve from being sucked into the internal part reversely, so that the sealing property of the internal system is damaged, and the pre-filtering efficiency is influenced. The width of the dust exhaust lip edge is wide, the thickness of the dust exhaust lip edge is thin, the joint area of the dust exhaust lip edge is large under the action of negative pressure, the dust exhaust lip edge can be closed more tightly, and the stability and the reliability of internal system sealing are improved. The dust exhaust lip edges are two vertical parallel flexible lip edges, a gap is formed between the two lip edges, and the two lip edges are closed to seal an internal system when negative pressure exists in the air filter.

The utility model discloses a dust exhaust valve can adopt integrative injection moulding with the lid, and the installation cost can be practiced thrift to the integrated into one piece structure, reduces equipment work, has avoided the installation clearance between the part, improves the leakproofness, and then guarantees the interior prefiltration efficiency of system. The flange limit of lid is wrapped to the recess of dust exhaust valve, and the packing in the recess of dust exhaust valve makes recess and flange limit locking spacing, and in the use, the dust exhaust valve is difficult for being dragged off from the lid by external force, has ensured the leakproofness of system, has improved the reliability.

Drawings

Fig. 1 is a perspective sectional view of a conventional desert air cleaner.

Fig. 2 is an enlarged view of a portion H in fig. 1.

Fig. 3 is a perspective view of an air cleaner according to the present invention.

Fig. 4 is an exploded view of fig. 3.

Fig. 5 is a cross-sectional view of fig. 3.

Fig. 6 is a sectional view a-a in fig. 5.

Fig. 7 is an enlarged view of a portion B in fig. 5.

Fig. 8 is an enlarged view of a portion C in fig. 5.

Fig. 9 is an exploded view of a pre-filter assembly.

Fig. 10 is a top view of the upper cover.

Fig. 11 is a cross-sectional view F-F of fig. 10.

Fig. 12 is an enlarged view of a portion D in fig. 11.

FIG. 13 is a front view of a swirl tube.

Fig. 14 is an enlarged view of a portion E in fig. 13.

Fig. 15 is a top view of the lower cover.

Fig. 16 is a cross-sectional view G-G of fig. 15.

Fig. 17 is a perspective view of the dust collection cover assembly.

Fig. 18 is a cross-sectional view of fig. 17.

Fig. 19 is an enlarged view of portion I in fig. 18.

Fig. 20 is a perspective view of the present invention.

In the figure: 1. a housing; 2. a main filter element; 3. a pre-filter assembly; 31. an upper cover; 310. a flat bottom surface; 311. a dust collecting surface; 313. a hollow tube; 314. a flange; 315. a first guiding and positioning part; 316. an inner wall; 317. reversing the first; 319. a bottom surface; 32. a swirl tube; 321. a spinning disk; 323. a limiting boss; 324. reversing the second; 325. an outer wall; 33. a special-shaped sealing ring; 331. a first bulge part; 332. a second bulge part; 34. a lower cover; 341. a swirl tube sleeve; 342. mounting grooves; 344. reinforcing ribs; 345. an inner edge; 346. an outer edge; 349. a second guiding and positioning part; 4. a first sealing element; 5. a dust collection cover assembly; 51. a cover body; 511. a flange edge; 53. ash discharging surface; 54. ribs; 55. a dust exhaust ejector pipe; 56. a dust exhaust valve; 561. a groove; 57. a dust exhaust lip; 58. a long groove; 59. a filling member; 6. an outer end cover; 7. an air inlet; 8. an air outlet; 9. a second sealing element; 10. a safety filter element; 11. a filter element cavity; 12. a dust collection chamber; 13. an air inlet cavity; 14. a dust exhaust cavity; alpha₁、ɑ₂: the angle of inclination.

Detailed Description

The following describes embodiments of the present invention with reference to the drawings.

As shown in fig. 3 and 4, the air cleaner of the present invention comprises a housing 1, a pre-filtering assembly 3 and a dust collecting cover assembly 5 from top to bottom, wherein an air outlet 8 is arranged on one side of the housing 1, an outer end cover 6 is fixedly arranged on the opposite side of the housing 1 through a buckle, and a second sealing member 9 is arranged between the housing 1 and the outer end cover 6; the shell 1 and the inner part of the outer end cover 6 are provided with a horizontal cylindrical main filter element 2, a concentric safety filter element 10 is arranged inside the main filter element 2, and a filter element cavity 11 inside the safety filter element 10 is communicated with the air outlet 8. The lower end of the shell 1 is fixed with the pre-filtering assembly 3 through a fastener, and a special-shaped sealing ring 33 is arranged between the pre-filtering assembly 3 and the shell 1; the pre-filter assembly 3 is provided with an air inlet 7 on the same side as the outer end cap 6. The lower end of the pre-filtering assembly 3 is fixed with a dust collecting cover assembly 5 through a buckle, and a sealing element I4 is arranged between the pre-filtering assembly and the dust collecting cover assembly.

As shown in fig. 5, the pre-filtering assembly 3 is located below the main filter element 2, the cavity space between the pre-filtering assembly 3 and the outer surface of the main filter element 2 is a dust collecting chamber 12, and the dust collecting chamber 12 is communicated with the upper port of the cyclone tube 32. The upper cover 31 of the pre-filtering assembly 3 is arranged above the lower cover 34 through the special-shaped sealing ring 33, the upper surface of the upper cover 31 is provided with a hole and downwardly extends to form a hollow pipe 313, the upper end part of the cyclone pipe 32 is inserted into the hollow pipe 313, and the cyclone pipes 32 arranged in an array are arranged in a ladder way, so that the cross section of the pre-filtering assembly 3 is approximately V-shaped; the cavity space between the outer wall of the cyclone tube 32, the upper cover 31 and the lower cover 34 is an air inlet cavity 13, and the air inlet cavity 13 is communicated with the air inlet 7. As shown in fig. 9 and 10, a vertical hollow tube 313 is provided inside the upper cover 31 corresponding to each swirl tube 32, a vertical swirl tube sleeve 341 is integrated on the lower cover 34 corresponding to each swirl tube 32, a swirl plate 321 is provided on the lower periphery of each swirl tube 32, the swirl plate 321 can be integrated on each swirl tube 32, and the swirl plate 321 can also be manufactured independently and is sleeved on the periphery of each swirl tube 32 in an assembling manner; the lower part of cyclone tube 32 containing cyclone sheet 321 is located in cyclone tube sleeve 341, cyclone sheet 321 is located at the mouth of cyclone tube sleeve 341, and the outline dimension of the outermost peripheral enveloping line of cyclone sheet 321 is matched with the inner diameter of cyclone tube sleeve 341 to ensure the coaxiality requirement of the outer wall of cyclone tube 32 and the inner wall of cyclone tube sleeve 341. Many cyclone tube sleeve 341 and 34 integrative injection moulding of lower cover in this embodiment, the integrative injection moulding of spinning disk 321 of every cyclone tube 32 rather than periphery had both been avoided the installation step of cyclone tube sleeve 341, eliminated the installation clearance, had saved the installation cost, can prevent moreover that spinning disk 321 from taking place the problem of installation dislocation or neglected loading, had guaranteed concentricity, the straightness requirement that hangs down between each part, improved the leakproofness between the subassembly, and then improved filtration efficiency in advance. As shown in fig. 11, a first guide positioning portion 315 is protruded downward from the central portion of the upper cover 31, as shown in fig. 16, a second guide positioning portion 349 is protruded upward from the central portion of the lower cover 34, as shown in fig. 6, the upper cover 31 and the lower cover 34 are engaged with each other by the first guide positioning portion 315 and the second guide positioning portion 349 and are fixed by a fastener.

As shown in fig. 5, the upper surface of the upper cover 31 is formed by two dust collecting surfaces 311 and a flat bottom surface 310 into an inverted trapezoid with two sides high and a middle low. In other embodiments, the upper surface of the upper cover 31 may also be formed into a V-shape with two dust collecting surfaces 311 with two sides high and a middle low; the upper surface of the upper cover 31 may also be a concave arc curved surface with two high sides and a low middle part. As shown in fig. 11, the dust collection surface 311 is a tilted plane having an inclination angle, and the inclination angle of the dust collection surface 311 is α₁Angle of inclination alpha₁The angle is 5-60 degrees, preferably 45 degrees. In other embodiments, the dust collecting surface 311 may be a multi-step stepped surface with two sides higher than the middle part, and the inclination angle of each stepped surface is 5 to 60 degrees, preferably 45 degrees. The dust collecting surface 311 may be a downward curved surface, and the inclination angle of the tangent plane to any point on the curved surface is 0 to 90 degrees. The dust collecting surface 311 may be a composite surface of any two or three of an inclined plane, a curved surface, and a stepped surface. The two dust collection surfaces 311 can be the same surface as any one described above or different surfaces. When the dust collecting surface 311 of the upper cover 31 is an inclined plane, a stepped surface or a downward curved surface, pollutants such as dust and sand falling on the dust collecting surface 311 slide down under the action of gravity and are discharged from the cyclone tube 32 in time, so that the pollutants are prevented from being deposited on the dust collecting surface 311, the influence of the pollutants on the filter element is avoided, the maintenance period of the filter element is prolonged, and the maintenance cost is reduced. As shown in fig. 5, the distance between the inverted trapezoidal upper surface of the upper cover 31 and the main filter element 2 is reduced, and the vertical distance between each point on the upper surface of the upper cover 31 and the corresponding outer surface of the main filter element 2 is close, which is beneficial to the uniform distribution of the gas flow field between the dust collecting surface 311 and the main filter element 2, so that the air flow filtered by the filter element surface is uniform, each part of the main filter element 2 is fully utilized, and the utilization rate of the filter element is improved.

As shown in fig. 11 and 12, the inner hole of the hollow tube 313 is sequentially an inner wall 316 and a circle of inverted buttons 317 protruding inwards from top to bottom, and the bottom 319 of the hollow tube 313 is a horizontal plane. As shown in fig. 13, the swirl tube 32 has a cylindrical upper portion and a conical lower portion. As shown in fig. 13 and 14, a circle of inverted-buckle two 324 protrudes outward from an outer wall 325 at the upper end of the cylindrical portion of the swirl tube 32, a circle of limiting boss 323 protrudes from the periphery of the swirl tube 32 below the inverted-buckle two 324, and the top surface of the limiting boss 323 is a horizontal plane; the swirl plate 321 is integrated on the outer wall of the lower end of the cylindrical part of the swirl tube 32, and the conical part of the swirl tube 32 is positioned below the swirl plate 321. As shown in fig. 13, the vortex sheet 321 is a curved vortex sheet, and an included angle between a tangent plane of the curved surface of the vortex sheet 321 and a horizontal line is 15 to 60 degrees, so that an optimal vortex effect is obtained without increasing air inlet resistance; the minor diameter end of circular cone portion is less than the major diameter end by 0.5mm ~ 5mm, both can play the guide effect when inserting spiral-flow tube sleeve 341, also can offset working of plastics shaping and assembly tolerance in, guaranteed concentricity, the straightness requirement that hangs down between spiral-flow tube 32 and spiral-flow tube sleeve 341, improve the leakproofness between the subassembly, and then improve prefiltration efficiency.

As shown in fig. 8, the first reverse buckle 317 of the hollow tube 313 and the second reverse buckle 324 of the swirl tube 32 are arranged in a staggered height, after the upper end of the swirl tube 32 is inserted into the hollow tube 313 of the upper cover 31, the second reverse buckle 324 of the swirl tube 32 is in interference fit with the inner wall 316 of the hollow tube 313, and the first reverse buckle 317 of the hollow tube 313 is in interference fit with the outer cylindrical surface of the cylindrical part of the swirl tube 32, so that the sealing property between the swirl tube 32 and the upper cover 31 is ensured, and gas leakage is prevented; the first reverse buckle 317 and the second reverse buckle 324 are interlocked, so that each cyclone tube 32 can be ensured to be installed in place, and the cyclone tubes 32 are prevented from being separated from the holes of the hollow tube 313, so that the cyclone tubes 32 are more firmly installed; the outer wall 325 of swirl tube 32 mates with the inner wall 316 of hollow tube 313; the top surface of the limit boss 323 of the swirl tube 32 is matched with the bottom surface 319 of the hollow tube 313, so that the limit in the vertical direction is realized, and the swirl tube 32 is prevented from being installed and dislocated due to overpressure.

As shown in fig. 5 and 7, the lower cover 34 has a mounting groove 342 on the upper peripheral flange thereof, the mounting groove 342 has a lower height near the inner edge 345 of the filter and a higher height near the outer edge 346; a flange 314 is protruded outwardly at the outer circumference of the lower end of the upper cover 31 at a position corresponding to the mounting groove 342, and the lower end surface of the housing 1 is in contact with the flange 314 of the upper cover 31 and the outer edge 346 of the mounting groove 342. The special-shaped sealing ring 33 is placed in the mounting groove 342, the special-shaped sealing ring 33 has a special-shaped cross section, the upper part of the special-shaped sealing ring 33 is provided with a second convex part 332 which protrudes upwards, and a first convex part 331 which protrudes inwards is arranged towards the inside of the filter; the upper end face of the second protruding part 332 is in pressing contact with the lower end face of the shell 1, a circle of convex ring protrudes downwards from the lower end face of the shell 1, and the convex ring further extrudes the upper end face of the second protruding part 332; the upper end surface of the second protruding part 332 generates certain elastic deformation, so that the sealing between the shell 1 and the upper cover 31 and the lower cover 34 is realized; the upper end face of the first projection 331 is in press contact with the lower end face of the flange 314 of the upper cover 31, the lower end face is in press contact with the inner edge 345 of the mounting groove 342, and the contact face of the first projection 331 is elastically deformed to some extent, thereby achieving sealing between the upper cover 31 and the lower cover 34. Adopt the utility model discloses an air cleaner has realized two liang of sealings between each face between upper cover 31, lower cover 34, the shell 1 simultaneously through a special-shaped seal circle 33, has simplified the structure, has reduced seal assembly, has reduced manufacturing cost, when having guaranteed the leakproofness of subassembly, having improved filtration efficiency in advance.

As shown in fig. 5, 15 and 16, the outer surfaces of the adjacent swirl tube sleeves 341 of the lower cover 34 are connected and reinforced by the reinforcing ribs 344, and the reinforcing ribs 344 ensure the overall strength of the lower cover 34 and the swirl tube sleeves 341 and improve the stability and reliability of the product. The cross section of the top surface of the lower cover 34 is in a shape with two high sides and a low middle part, and basically corresponds to the undulation shape of the upper cover 31, the top surface of the lower cover 34 can be an inclined plane with an inclination angle, and the inclination angle is 5-60 degrees, preferably 45 degrees; the inclined plane can be a multi-step surface, a downward curved surface or a composite surface formed by combining an inclined plane, a step surface and a curved surface at will, and the inclination angle of a tangent plane at any point on the curved surface is 0-90 degrees; the top surfaces of the left and right sides of the lower cover 34 may be any one of the surfaces described above, or a combination of two different surfaces. The shape of the lower cover 34 is designed to be correspondingly contoured along the geometric shape of the upper cover 31, so that the space size of the pre-filtering assembly 3 can be reduced, the space size of the air filter is reduced, and the raw material cost is saved. As shown in fig. 5, since the cyclone tube sleeve 341 is arranged to match the height of the cyclone tube 32, the bottom of the lower cover 34 is also a stepped surface, the cross section of the cover body 51 of the dust collection cover assembly 5 is an inverted trapezoid, and the bottom of the lower cover 34 is matched with the shape of the cover body 51, on one hand, the distance from the cyclone tube sleeve 341 for dropping the pollutants such as dust to the discharge from the dust discharge valve 56 is short, thereby improving the filtering efficiency, on the other hand, the lower cover 34 is just positioned in the cover body 51, the structure is compact, and the volume of the whole product is reduced. The cavity space between the lower cover 34 and the cover 51 is a dust exhaust cavity 14, and the dust exhaust cavity 14 is communicated with the lower port of the cyclone tube 32 through a cyclone tube sleeve 341.

As shown in fig. 17 and 18, a dust exhaust injection pipe 55 is disposed at the bottom inside the cover body 51 of the dust collection cover assembly 5, and one end of the dust exhaust injection pipe 55 located outside the cover body 51 can be externally connected with an injection airflow for efficient dust discharge; the lid 51 outside is located the dust exhaust and draws and penetrate pipe 55 below and be fixed with the dust exhaust valve 56 of rectangular shape, and dust exhaust valve 56 also can adopt integrative injection moulding with lid 51, and the installation cost can be practiced thrift to the integrated into one piece structure, reduces equipment work, has avoided the installation clearance between the part, improves the leakproofness, and then guarantees the interior prefiltration efficiency of system. As shown in fig. 19, in the process of injecting the dust exhaust valve 56 onto the cover 51, a groove 561 is formed on the upper end of the dust exhaust valve 56 corresponding to the raised flange 511 at the lower opening of the cover 51, and the groove 561 encloses the flange 511; still be provided with a plurality of through-holes on flange 511, dust exhaust valve 56 when moulding plastics, the injection molding material directly gets into the through-hole and solidifies and be formed with a plurality of columniform fillers 59 in recess 561, and fillers 59 makes recess 561 and flange 511 lock spacing, and in the use, dust exhaust valve 56 is difficult for being dragged from lid 51 by external force, has ensured the leakproofness of system, has improved the reliability. As shown in fig. 18, the cover 51 has a symmetrical ash discharge surface 53 on the inner surface, the ash discharge surface 53 is an inclined plane having an inclination angle, and the inclination angle of the ash discharge surface 53 is α₂Angle of inclination alpha₂The angle is 5-60 degrees, preferably 45 degrees. In other embodiments, the ash discharge surface 53 may be a multi-step surface, a downward curved surface or a composite surface formed by combining an inclined plane, a step surface and a curved surface, and the inclination angle of a tangent plane at any point on the curved surface is 0-90 degrees; the two ash surfaces 53 may be either one of the surfaces described above or a combination of two different surfaces. The dust discharging surface 53 of the dust collecting cover is arranged as an inclined plane, a step surface and a downward curved surfaceWith a large inclination angle, the pollutants such as dust and sand falling on the dust discharging surface 53 can slide off in time and be discharged in time under the action of gravity, thereby avoiding the deposition of the pollutants.

As shown in fig. 18, 19 and 20, an oblong elongated slot 58 is formed in the dust exhaust valve 56, the cross section of the elongated slot 58 is V-shaped, and in other embodiments, the cross section of the elongated slot 58 may also be U-shaped or circular arc-shaped; the plurality of vertical ribs 54 are arranged in the width direction in the elongated slot 58, and when the negative pressure of the internal system acts, the ribs 54 can prevent the dust exhaust valve 56 from being sucked into the interior reversely, so that the sealing performance of the internal system is damaged, and the pre-filtering efficiency is influenced; the bottom of the long groove 58 is opened and provided with two vertical and parallel strip-shaped dust exhaust lip edges 57, and the dust exhaust lip edges 57 are made of rubber and thermoplastic elastomer flexible materials; a certain gap is formed between the two dust exhaust lip edges 57, the gap value is about 0.5 mm-2 mm, and when negative pressure exists in the air filter, the two dust exhaust lip edges 57 can be tightly attached and closed under the action of the negative pressure to realize sealing of an internal system. The upper end opening of the long groove 58 is in a runway shape, the length direction dimension is 1.5-50 times of the width direction dimension, the overflow area of the upper end opening of the long groove 58 is large, the dust containing capacity is large, the dust flowing in unit time is large, and the dust discharging capacity is improved. The length of the dust exhaust lip edge 57 is greater than that of the opening of the long groove 58, and the two outer ends of the dust exhaust lip edge 57 extend outwards for a certain length along the length direction of the long groove 58 so as to ensure that the dust exhaust lip edge 57 seals the two ends of the long groove 58, the length of the dust exhaust lip edge 57 is longer, the opening of the dust exhaust lip edge 57 is larger when the dust exhaust lip edge 57 is opened, and the dust exhaust capacity is improved; the height of the dust exhaust lip edge 57 is 5 mm-50 mm, the thickness of two lip edges of the dust exhaust lip edge 57 is 0.5 mm-5 mm, the height of the dust exhaust lip edge 57 is larger, the thickness is relatively thinner, the closing of the dust exhaust lip edge 57 can be tighter, and the stability and reliability of the internal system sealing are improved.

Adopt the utility model discloses an air cleaner during operation, air inlet 7 links to each other with high-order bleed pipeline or other pipelines, and gas outlet 8 links to each other with the engine air inlet pipeline, and the engine normal during operation, the inside state that is in the negative pressure of air cleaner, the laminating of dust exhaust lip limit 57 of dust exhaust valve 56 lower extreme makes the inside airtight state that is in of air cleaner's filtration system. As shown in fig. 3, 4, 5 and 6, the external polluted air containing various particle-size and dust-like pollutants is introduced into the air inlet 7 of the air cleaner through the air bleed pipeline, and enters the interior of the pre-filtering assembly 3 from the air inlet 7, the air firstly enters the air inlet chamber 13 formed by the outer wall of each cyclone tube 32, the upper cover 31 and the lower cover 34, under the action of the internal negative pressure, the air flow enters down into cyclone tube sleeve 341 and passes through the region of cyclone plate 321, the cyclone is generated by the high-speed rotation under the guiding action of the cyclone sheet 321, the dust pollutants with larger particle size and heavier mass in the air flow are concentrated on the inner circumferential surface of the cyclone tube sleeve 341 under the action of centrifugal force, since the flow velocity of the fluid in the wall boundary of the inner circumferential surface approaches zero, the dust contaminant having a large particle size and a heavy weight near the wall surface is separated and slides down by gravity. The pre-filtering assembly 3 separates dust pollutants with larger particle size and heavier mass to obtain cleaner pre-filtered air fluid, the pre-filtered air fluid turns upwards from an opening at the bottom end of the cyclone tube 32 to enter the cyclone tube 32, and flows out of an opening at the upper end of the cyclone tube 32 to the dust collecting cavity 12 to reach the outer surface of the main filter element 2, and then passes through the main filter element 2 and the safety filter element 10 to enter the filter element cavity 11, the dust pollutants with smaller particle size and lighter weight are further filtered by the main filter element 2 to finally obtain clean air meeting the cleanliness requirement of an engine, and the clean air passes through the safety filter element 10 and then enters an air inlet pipeline of the engine through the air outlet 8.

The dust pollutants separated and sliding down in the cyclone tube sleeve 341 and having large particle size and heavy weight are discharged into the dust discharge chamber 14 from the lower part of the cyclone tube sleeve 341 and fall onto the dust discharge surface 53 of the dust collection cover assembly 5, and the dust pollutants falling onto the dust discharge surface 53 slide down into the dust discharge valve 56 under the action of gravity because the dust discharge surface 53 is an inclined surface. When the dust contaminant in the dust discharge valve 56 is deposited to a certain amount, the dust discharge lip 57 is opened by the gravity of the dust contaminant and discharged from the opening of the dust discharge lip 57. The dust exhaust ejector pipe 55 is connected to the ejector fan, when the deposition amount of the dust in the dust exhaust valve 56 reaches a certain amount and is not discharged, the ejector fan can be turned on to discharge the dust, and when the ejector fan does not work, the pressure of the dust exhaust ejector pipe 55 is equal to the pressure in the dust collection cover assembly 5.

Adopt the utility model discloses an air cleaner also is applicable to the blowback system, and when the blowback system was applied to air cleaner, gas outlet 8 was connected with the tee bend pipeline, and a interface of tee bend pipeline links to each other with the engine air inlet pipeline, and another interface links to each other with the blowback system. When the back blowing system is operated, the back blowing system blows clean compressed air into the filter element cavity 11 in the safety filter element 10 from the air outlet 8, the compressed air passes through the safety filter element 10 and the main filter element 2, and dust pollutants deposited on the outer surface of the main filter element 2 are stripped to the dust collection cavity 12; under the combined action of gravity and compressed air fluid, one part of dust pollutants in the dust collection chamber 12 directly flows out from the cyclone tube 32 to the dust discharge chamber 14 of the dust discharge valve 56 along with the compressed air fluid, and the other part falls on the dust collection surface 311 of the upper cover 31 of the pre-filtering assembly 3, and due to the inclination angle of the dust collection surface 311, under the action of gravity, the dust pollutants descend along the inclined surface and are collected in the cyclone tube 32 and flow out from the cyclone tube 32 to the dust discharge chamber 14 of the dust discharge valve 56. Under the pressure of the compressed air, the dust discharging lip 57 of the dust discharging valve 56 is opened, and most of dust pollutants in the dust discharging cavity 14 of the dust discharging valve 56 are directly discharged from the dust discharging lip 57; a portion of the dust contaminants in the dirt discharge chamber 14 fall onto the dirt discharge surface 53 and slide along the dirt discharge surface under the force of gravity and are discharged from the dirt discharge lip 57.

Adopt the utility model discloses an air cleaner is at dust collecting face 311 of the upper cover 31 of prefilter assembly 3, the row's of lid 51 of collection dirt lid assembly 5 grey face 53 for having inclined plane, ladder inclined plane or decurrent curved surface at the inclination, and the pollutant such as dust, grains of sand that fall on above can the landing in cyclone tube 32 under the effect of gravity, then gets into collection dirt lid assembly 5, in time discharges from dust exhaust valve 56. The pollutants are discharged in time, the deposition of the pollutants is avoided, the maintenance period of the air filter is prolonged, and the maintenance cost is reduced.

The above description is illustrative of the present invention and is not intended to limit the present invention, and the present invention may be modified in any manner without departing from the spirit of the present invention. For example, in the dust collecting surface 311 of the first embodiment, a small tapered dust collecting surface is further provided at the upper end portion between the adjacent hollow tubes 313, so that dust can more easily slide down into the cyclone tube 32. The upper surface of the upper cover 31, the top surface of the lower cover 34, or the ash discharge surface 53 of the cover body 51 may have a shape with two sides high and a middle low, and may be disposed axially symmetrically or asymmetrically with respect to the longitudinal central axis of the filter element.

Claims (10)

1. The utility model provides an air cleaner's dust exhaust valve structure, sets up in the bottom of collection dirt lid assembly (5), its characterized in that: an elongated slot (58) is arranged in the dust exhaust valve (56), the bottom of the elongated slot (58) is opened and is provided with two strip-shaped dust exhaust lip edges (57).

2. A dust exhausting valve structure of an air cleaner according to claim 1, wherein: the upper port of the long groove (58) is oblong or elliptical, and the length direction dimension is 1.5-50 times of the width direction dimension.

3. A dust exhausting valve structure of an air cleaner according to claim 1, wherein: the cross section of the long groove (58) is V-shaped, U-shaped or circular arc-shaped.

4. A dust exhausting valve structure of an air cleaner according to claim 1, wherein: the two outer ends of the dust exhaust lip (57) extend outwards for a certain length along the length direction of the dust exhaust valve (56) to seal the two ends of the long groove (58).

5. A dust exhausting valve structure of an air cleaner according to claim 1, wherein: vertical ribs (54) are arranged in the long grooves (58).

6. A dust exhausting valve structure of an air cleaner according to claim 1, wherein: the two dust exhaust lip edges (57) are vertically arranged in parallel, a certain gap is arranged between the two lip edges, and the gap is 0.5 mm-2 mm.

7. A dust exhausting valve structure of an air cleaner according to claim 1, wherein: the height of the dust exhaust lip (57) is 5 mm-50 mm, and the thickness of the dust exhaust lip (57) is 0.5 mm-5 mm.

8. A dust exhausting valve structure of an air cleaner according to claim 1, wherein: the dust exhaust valve (56) and the cover body (51) of the dust collection cover assembly (5) adopt an integral injection molding structure, the dust exhaust valve (56) forms a groove (561) corresponding to the raised flange edge (511) of the cover body (51), and the groove (561) wraps the flange edge (511).

9. The dust exhausting valve structure of an air cleaner according to claim 8, wherein: a plurality of cylindrical filling pieces (59) are also formed in the groove (561).

10. A dust exhausting valve structure of an air cleaner according to claim 1, wherein: the dust exhaust valve (56) uses a flexible material of rubber or thermoplastic elastomer.

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