CN210118212U

CN210118212U - Swirl tube

Info

Publication number: CN210118212U
Application number: CN201920776727.7U
Authority: CN
Inventors: 顾晶晶
Original assignee: Wuxi Yili Environmental Protection Technology Co Ltd
Current assignee: Wuxi Yili Environmental Protection Technology Co Ltd
Priority date: 2019-05-28
Filing date: 2019-05-28
Publication date: 2020-02-28
Anticipated expiration: 2029-05-28

Abstract

The utility model discloses a cyclone tube, cyclone tube arrange on the upper cover of prefilter assembly, cyclone tube upper portion is cylinder portion, and the lower part is the circular cone portion to the lower extreme shrink. The utility model discloses a lower extreme is the circular cone portion of downward shrink, behind the whirl pipe sleeve of whirl pipe insert below, the distance of whirl pipe circular cone portion surface distance whirl pipe sleeve's inner wall is big, and the dirty air that carries the dust is difficult to block up here, even if because the whirl pipe that assembly error arouses is crooked in whirl pipe sleeve, the circular cone portion surface of whirl pipe still keeps having a certain distance apart from whirl pipe sleeve's inner wall, the dead angle of admitting air can not appear, prevents that the dust from blockking up in dead angle department.

Description

Swirl tube

Technical Field

The utility model belongs to the technical field of engine air intake system's air cleaner and specifically relates to a cyclone tube.

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, the conventional desert air filter is 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, the lower end of the cyclone tube sleeve 341 is sleeved on a corresponding hole of a lower cover 34, and the upper surface of the upper cover 31 is a horizontal dust collecting surface 3100. As shown in fig. 3, the lower end of the conventional swirl tube 32 is cylindrical, and when the swirl tube 32 is inserted into the swirl tube sleeve 341 below, if there is an assembly error, the swirl tube 32 may be tilted in the swirl tube sleeve 341, the opening at the lower end of the tilted cylindrical swirl tube 32 is very close to the inner wall of the swirl tube sleeve 341, dirty air carrying dust is easily blocked at the place after entering, and dust contaminants separated at the place are very easy to directly enter the swirl tube 32 from the opening at the lower end of the swirl tube 32 because of being very close to the opening at the lower end of the swirl tube 32, thereby reducing the pre-filtering efficiency of the swirl tube 32; even if the separated dust contaminants do not enter the cyclone tube 32 from the lower end opening of the cyclone tube 32, air resistance increases there, thereby reducing the pre-filtering efficiency. The swirl tube 32, the swirl plate 321 and other parts of the pre-filter assembly 3 of the conventional desert air filter are generally manufactured and assembled independently. On one hand, the assembly clearance among all the parts is large, the leakage points are large, and the polluted air can enter the interior of the pre-filtering assembly 3 from the leakage part; on the other hand, the concentricity and the verticality between the upper cover 31 and the cyclone tube 32 and between the cyclone tube sleeve 341 and the lower cover 34 are poor, so that the sealing performance between the components is poor, and therefore, the pre-filtering efficiency of the pre-filtering assembly 3 is low. The assembly of each part of the existing pre-filtering assembly 3 is basically completed manually, a large amount of manpower is consumed, installation dislocation and even neglected installation are easy to occur, the pre-filtering efficiency of the pre-filtering assembly 3 is further influenced, the production and assembly cost is high, each part has difference, the consistency and the stability of a product are reduced, and the difficulty of maintaining the product by an end user is also increased. As shown in FIG. 2, there is a round of bellying 320 at the outside arch of vortex tube 32 upper end periphery, corresponds on upper cover 31 and is equipped with boss 3101, and vortex tube 32 passes through the cooperation installation of bellying 320 and boss 3101 on upper cover 31, is clearance fit between the two, and the leakproofness of cooperation department is relatively poor, and the air is revealed from the cooperation easily, and in the course of the work, vortex tube 32 receives the exogenic action, takes place to become flexible easily.

SUMMERY OF THE UTILITY MODEL

The applicant provides a rational in infrastructure vortex pipe to above-mentioned current cylindrical vortex pipe because assembly error is crooked back, dust pollutant very easily gets into the vortex pipe from vortex pipe lower extreme opening, reduces shortcomings such as prefiltering efficiency, and tip is the circular cone portion of shrink under the vortex pipe, increases the distance of tip and vortex pipe sleeve inner wall under the vortex pipe, improves prefiltering efficiency.

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

the utility model provides a cyclone tube, cyclone tube arranges on prefilter assembly's upper cover, and cyclone tube upper portion is cylinder portion, and the lower part is the circular cone portion of shrinking to the lower extreme.

As a further improvement of the above technical solution:

the small diameter end of the conical part is 0.5 mm-5 mm smaller than the large diameter end.

The utility model discloses a lower extreme is the circular cone portion of downward shrink, behind the whirl pipe sleeve of whirl pipe insert below, the distance of whirl pipe circular cone portion surface distance whirl pipe sleeve's inner wall is big, and the dirty air that carries the dust is difficult to block up here, even if because the whirl pipe that assembly error arouses is crooked in whirl pipe sleeve, the circular cone portion surface of whirl pipe still keeps having a certain distance apart from whirl pipe sleeve's inner wall, the dead angle of admitting air can not appear, prevents that the dust from blockking up in dead angle department. The circular cone portion of the cyclone tube can also play a role in guiding when the cyclone tube sleeve is inserted into the cyclone tube sleeve, and can also ensure the concentricity and the verticality requirements between the cyclone tube and the cyclone tube sleeve when offsetting the forming and assembling tolerance of plastic parts, thereby improving the sealing property between components and further improving the pre-filtering efficiency.

The periphery of the cyclone tube is integrated with a cyclone sheet, and the cyclone tube and the cyclone sheet are integrally formed.

The utility model discloses a spiral-flow tube and the whole integrative injection moulding that adopts of spinning disk have avoided the assembly step, have avoided the installation clearance between the part, have saved installation cost, prevent to take place the problem of installation dislocation or neglected loading, have guaranteed concentricity, the straightness requirement that hangs down between the part, improve the leakproofness between the subassembly, and then improve prefiltration efficiency.

The outer wall of the cyclone tube is provided with a second reverse buckle in a protruding mode, the hollow tube of the upper cover is internally provided with a first reverse buckle in a protruding mode, and the second reverse buckle is in interference fit with the inner wall of the hollow tube after the cyclone tube is inserted into the hollow tube.

The periphery of the cyclone tube is provided with a circle of limiting bosses, the top surfaces of the limiting bosses are horizontal planes, and the limiting bosses are matched with the horizontal bottom surface of the hollow tube to realize the limiting in the vertical direction.

The air filter of the utility model is adopted, two back-off buttons are respectively arranged on the cyclone tube mounting position of the upper cover and the cyclone tube and are respectively in interference fit with the fitting surface, thus ensuring the sealing property between the cyclone tube and the upper cover and preventing gas leakage; two back-offs are locked mutually, can guarantee that every cyclone tube installation targets in place to prevent that cyclone tube from following the downthehole deviating from of cyclone tube installation position, make cyclone tube's installation more firm. The spacing boss of whirl pipe cooperatees with the spacing face of axial of whirl pipe installation position, and it is spacing to carry out the axial to the installation of whirl pipe, prevents that the whirl pipe from leading to the installation dislocation because the excessive pressure.

The utility model has the advantages as follows:

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 schematic view of a prior art swirl tube inserted into a swirl tube socket, at which time the swirl tube is tilted within the swirl tube socket.

Fig. 4 is a perspective view of an air cleaner according to the present invention.

Fig. 5 is an exploded view of fig. 4.

Fig. 6 is a cross-sectional view of fig. 4.

Fig. 7 is a sectional view a-a in fig. 6.

Fig. 8 is an enlarged view of a portion B in fig. 6.

Fig. 9 is an enlarged view of a portion C in fig. 6.

Fig. 10 is an exploded view of a pre-filter assembly.

Fig. 11 is a plan view of the upper cover.

Fig. 12 is a cross-sectional view F-F in fig. 11.

Fig. 13 is an enlarged view of a portion D in fig. 12.

Fig. 14 is a front view of the present invention.

Fig. 15 is an enlarged view of a portion E in fig. 14.

Fig. 16 is the schematic view of the utility model discloses insert the telescopic sketch of whirl pipe, the whirl pipe is crooked at this moment in the whirl pipe sleeve.

Fig. 17 is a top view of the lower cover.

Fig. 18 is a sectional view taken along line G-G in fig. 17.

Fig. 19 is a perspective view of the dust collection cover assembly.

Fig. 20 is a cross-sectional view of fig. 19.

Fig. 21 is a perspective view of the dust exhaust valve.

In the figure: 1. a housing; 2. a main filter element; 3. a pre-filter assembly; 31. an upper cover; 3100. a horizontal dust collecting surface; 3101. a boss; 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. is reversely buckled to(ii) a 319. A bottom surface; 32. a swirl tube; 320. a boss portion; 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; 53. ash discharging surface; 55. A dust exhaust ejector pipe; 56. a dust exhaust valve; 57. a dust exhaust lip; 58. a long groove; 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. 4 and 5, 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. 6, 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. 10 and 11, 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. 12, a first guide positioning portion 315 is protruded downward from the central portion of the upper cover 31, as shown in fig. 18, a second guide positioning portion 349 is protruded upward from the central portion of the lower cover 34, as shown in fig. 7, 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. 6, 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. 12, 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 multi-stepped with two sides higher than the middleThe inclination angle of each step surface is 5-60 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. 6, 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. 12 and 13, 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. 14, the upper portion of cyclone tube 32 is the cylinder portion, the lower part is circular cone portion, cyclone tube 32 inserts behind the cyclone tube sleeve 341 of below, the distance of cyclone tube 32 circular cone portion surface distance cyclone tube sleeve 341 is big, dirty air that carries the dust is difficult to block up here, as shown in fig. 16, even if cyclone tube 32 that arouses because assembly error is crooked in cyclone tube sleeve 341, the circular cone portion surface of cyclone tube 32 still keeps certain distance apart from the inner wall of cyclone tube sleeve 341, the dead angle of admitting air can not appear, prevent that the dust from blockking up in dead angle department. As shown in fig. 14 and 15, 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. 14, 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. 9, 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. 6 and 8, the lower cover 34 has an installation groove 342 on the upper peripheral flange, the installation 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 up-and-down sealing among the shell 1, the upper cover 31 and the lower cover 34 is realized; the inner peripheral surface of the first projection 331 is in press contact with the outer peripheral wall surface below the flange 314 of the upper cover 31, and the inner peripheral surface of the first projection 331 is elastically deformed to a certain extent, thereby achieving the horizontal sealing among the housing 1, 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. 6, 17 and 18, 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. 6, 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. 19 and 20, 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 cover body 51 is externally positioned below the dust exhaust injection pipe 55 and is fixedly provided with a dust exhaust valve 56 in a long strip shape, the dust exhaust valve 56 and the cover body 51 can also adopt an integrated into one piece structure, the integrated into one piece structure can save the installation cost, the assembly work is reduced, the installation gap between the parts is avoided, the sealing performance is improved, and the pre-filtering efficiency in the system is further ensured. As shown in fig. 20, 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 set to be an inclined plane, a step surface and a downward curved surface, a larger inclination angle is provided, and pollutants such as dust, sand particles and the like falling on the dust discharging surface 53 can timely slide and be timely discharged under the action of gravity, so that the deposition of the pollutants is avoided.

As shown in fig. 20 and 21, an oblong elongated slot 58 is formed in the dust exhaust valve 56, the cross section of the elongated slot 58 is triangular, and in other embodiments, the cross section of the elongated slot 58 may also be U-shaped or circular arc; 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. 4, 5, 6 and 7, 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, a small tapered dust collecting surface is provided at the upper end of the hollow tube 313 in the dust collecting surface 311, 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 dust discharge surface 53 of the cover body 51 may have a shape with two high sides and a low middle part, and may be disposed axially symmetrically or asymmetrically with respect to the longitudinal center axis of the filter element 2.

Claims

1. A swirl tube, characterized in that: the cyclone tube (32) is arranged on an upper cover (31) of the pre-filtering assembly (3), the upper part of the cyclone tube (32) is a cylindrical part, and the lower part of the cyclone tube is a conical part which shrinks towards the lower end.

2. The swirl tube of claim 1, wherein: the small diameter end of the conical part is 0.5 mm-5 mm smaller than the large diameter end.

3. The swirl tube of claim 1, wherein: the periphery of the swirl tube (32) is integrated with the swirl plate (321), and the swirl tube (32) and the swirl plate (321) are integrally formed.

4. The swirl tube of claim 1, wherein: the outer wall (325) of the cyclone tube (32) is provided with a reverse buckle II (324) in a protruding mode, the hollow tube (313) of the upper cover (31) is provided with a reverse buckle I (317) in a protruding mode, and after the cyclone tube (32) is inserted into the hollow tube (313), the reverse buckle II (324) is in interference fit with the inner wall (316) of the hollow tube (313).

5. The swirl tube of claim 3, wherein: the periphery of the cyclone tube (32) is provided with a circle of limiting boss (323), the top surface of the limiting boss (323) is a horizontal plane, and the limiting boss is matched with the horizontal bottom surface (319) of the hollow tube (313) to realize the limiting in the vertical direction.