CN218493697U

CN218493697U - Prefiltering self-dust-removing device

Info

Publication number: CN218493697U
Application number: CN202223147591.4U
Authority: CN
Inventors: 孙斌
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-11-27
Filing date: 2022-11-27
Publication date: 2023-02-17
Anticipated expiration: 2032-11-27

Abstract

The utility model relates to a prefiltering is from dust collector, including the gas vent, pulse conduit, the prefiltration chamber, the air outlet, prefilter, the air intake, the assembly is strained to the sky, the assembly intake pipe, main filter, the assembly gas outlet, install main filter in the sky assembly of straining, be equipped with the assembly gas outlet in the main filter, the assembly is strained to the sky is equipped with the assembly intake pipe, assembly intake pipe installation prefilter, prefilter is equipped with air intake and air outlet, assembly intake-tube connection prefiltration chamber, prefilter's air outlet is connected to the prefiltration chamber, be equipped with the gas vent between prefiltration chamber and the air outlet, pulse conduit is connected to the gas vent, pulse conduit connection pulse air supply. The utility model discloses a characteristics, stable, reliable, small, the assembly is simple, and the integrated design, the high-efficient dust of clearing up improves filtration system dust removal ability, makes engine work safer.

Description

Prefiltering self-dust-removing device

Technical Field

The utility model relates to a dust collector of vehicle, in particular to prefilter from dust collector.

Background

The filtration system of present vehicle often uses oil bath filter, the desert filter, the whirl shunt, all be artifical manual maintenance, high in labor strength, the maintenance effect is difficult to guarantee, lead to dust secondary pollution, there is an automatic dust removal filter also, the mode of prefilter and main filter series connection has been adopted, prefilter casing and main filter casing are two independent parts in this technique, then dock together by the connecting tube, the volume of connecting tube occupies great proportion in the structure, lead to actual dimension increase and rigidity poor, in order to connect the poor defect of pipe rigidity, need more supplementary fixed part, make filtration system structure complicated and bulky, to the mechanical equipment who admits air on, because the oversize size is high, cause the installation and use difficulty, also because the connecting tube butt joint is poor simultaneously, reduce the reliability of product, the utility model provides a prefilter from dust collector to above-mentioned defect.

Disclosure of Invention

The utility model aims at providing a stable, reliable, small prefilter is from dust collector.

The technical scheme of the utility model a prefilter is from dust collector, including the gas vent, pulse conduit, the prefilter chamber, the air outlet, the prefilter, the air intake, the assembly is strained to the sky, the assembly intake pipe, main filter, the assembly gas outlet, install main filter in the assembly is strained to the sky, be equipped with the assembly gas outlet in the main filter, the assembly is strained to the sky is equipped with the assembly intake pipe, assembly intake pipe installation prefilter, the prefilter is equipped with air intake and air outlet, assembly intake-tube connection prefilter chamber, the air outlet of prefilter is connected to the prefilter chamber, be equipped with the gas vent between prefilter chamber and the air outlet, pulse conduit is connected to the gas vent, pulse conduit connection pulse air supply.

The pre-cleaner is honeycomb type. The pre-filter adopts a barrel shape. The pre-filter is arranged on the periphery of the air inlet pipe of the assembly. The pre-filter is arranged at the upper part of the air inlet pipe of the assembly. The assembly air inlet pipe penetrates through the pre-filter. The pre-filter is arranged on one side of the periphery of the air inlet pipe of the assembly. The main filter adopts a honeycomb type. The air inlet faces the ground. And a dust baffle plate is arranged on the outer side of the air filter assembly. An inner sealing element is arranged between the assembly air inlet pipe and the pre-cleaner. An external sealing gasket is arranged between the prefiltering cavity and the prefilter.

Compared with the prior art, the utility model have following characteristics: first, the filter in advance is directly fixed to main filter intake pipe outer wall, and is small, satisfies the requirement in the aspect of the vehicle space compact structure, and the assembly is simpler. Secondly, the periphery of the air inlet pipe of the assembly is provided with a honeycomb type pre-filter, and filtered air returns to the air filter assembly through the inner wall of the air inlet pipe of the assembly, so that the advancing route of the air is shortened, the original air inlet resistance is reduced, and the air inflow of the system is ensured. Thirdly, the air inlet surface of the honeycomb type pre-filter is downward, the blocked dust is inversely hung on the lower surface of the filter paper of the honeycomb type pre-filter, and when the dust remover works, the dust is more easily peeled off under the double acting force of reverse pulse and gravity by using the gravity, so that the dust removing work is smoother.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic view of the honeycomb type prefilter of the present invention.

Fig. 3 is a schematic view of the barrel-shaped pre-filter.

Fig. 4 is a schematic view of the honeycomb type main filter of the present invention.

Fig. 5 is a schematic view of a side structure of the honeycomb pre-filter of the present invention.

Fig. 6 is a schematic view of the honeycomb pre-filter overhead structure of the present invention.

Detailed Description

The following describes the present technology in further detail with reference to the attached drawings.

Example 1

It is right to combine accompanying drawing 1 the utility model discloses do further detailed description, install main filter 9 in the assembly 11 is strained to the sky, be equipped with assembly gas outlet 10 in the main filter 9, the sky is strained assembly 11 and is equipped with assembly intake pipe 6, assembly intake pipe 6 installs prefilter 5 in advance, prefilter 5 is equipped with air intake 7, prefilter 5's air intake 7 communicates with each other with the atmosphere, assembly intake pipe 6 connects prefilter chamber 3, prefilter chamber 3 connects prefilter 5's air outlet 4, prefilter chamber 3 and air outlet 4 between be equipped with gas vent 1, pulse pipe 2 is connected to gas vent 1, pulse pipe 2 connects pulse air supply 8, prefilter 5 designs in the empty assembly intake pipe 6 of straining assembly 11 of blowback, prefilter filtration system's size has been reduced, accord with vehicle compact structure's characteristics.

The engine works, the gas enters through the air inlet 7 of the pre-filter 5, the pre-filter 5 is designed on the assembly air inlet pipe 6, when the gas is filtered through the pre-filter 5, the dust in the gas is collected on the outer wall of the pre-filter 5, the filtered gas enters the pre-filter chamber 3 through the air outlet 4 and enters the assembly air inlet pipe 6 from the pre-filter chamber 3, the filtering of the gas is completed on the outer wall of the assembly air inlet pipe 6, the conveying of the gas is completed in the assembly air inlet pipe 6, two effects are realized by one component, the gas conveying distance is shortened, the air inlet resistance of a pipeline is reduced, the gas is guided into the air filter assembly 11 through the assembly air inlet pipe 6, the main body of the dust is filtered by the pre-filter 5, the gas with little dust enters the air filter assembly 11, and finally, after fine filtering is carried out through the main filter 9 of the air filter assembly 11, the air outlet 10 is used for supplying the engine to work.

Pulse gas of pulse air supply 8 gets into pulse pipe 2 after, releases through gas vent 1, and pulse gas gets into between prefiltration chamber 3 and the air outlet 4, acts on prefilter 5 through air outlet 4, and pulse gas has taken away the dust of collecting at prefiltration ware 5 outer wall in engine work when prefiltration ware 5, and the atmosphere is sent back to through air intake 7, and under pulse gas effect, the dust has broken away from prefiltration ware 5, guarantees the air input of engine.

Example 2

It is right to combine the attached drawing 2 the utility model discloses do further detailed description, install main filter 9 in the empty assembly 11 of straining, be equipped with assembly gas outlet 10 in the main filter 9, the empty assembly 11 outside of straining is equipped with dust board 12, empty assembly 11 of straining is equipped with assembly intake pipe 6, assembly intake pipe 6 is installed and is pre-filtered 5, pre-filtered 5 establishes the periphery at assembly intake pipe 6, assembly intake pipe 6 runs through pre-filtered 5, pre-filtered 5 adopts the honeycomb, honeycomb is pre-filtered 5 and is equipped with air intake 7, air intake 7 is towards ground, assembly intake pipe 6 connects pre-filtered chamber 3, pre-filtered chamber 3 connects honeycomb air outlet 4 of pre-filtered 5, be equipped with gas vent 1 between pre-filtered chamber 3 and the air outlet 4, gas vent 1 connects pulse conduit 2, pulse conduit 2 connects pulse source 8, be equipped with inner seal spare 14 between assembly intake pipe 6 and the honeycomb pre-filtered 5, be equipped with outer sealing pad 13 between pre-filtered chamber 3 and the honeycomb pre-filtered cleaner 5, the honeycomb is sealed to fill up the pad in advance to be small flow volume big, further the compact size of filter has accorded with, the blowback-filtered size of vehicle system's characteristics.

The engine works, gas enters the honeycomb type pre-filter 5 from the air inlet 7, an outer sealing gasket 13 is arranged between the pre-filter cavity 3 and the honeycomb type pre-filter 5, the phenomenon that a short circuit occurs between the pre-filter cavity 3 and the outside is prevented, the end face of the air inlet 7 faces the ground, when the gas is filtered through the honeycomb type pre-filter 5, dust in the gas is collected in the honeycomb type pre-filter 5 in an inverted hanging mode, the filtered gas passes through the air outlet 4 and enters the assembly air inlet pipe 6 from the pre-filter cavity 3, an inner sealing piece 14 is arranged between the assembly air inlet pipe 6 and the honeycomb type pre-filter 5, the phenomenon that the assembly air inlet pipe 6 is short-circuited with the outside is prevented from occurring, the gas is filtered through the main filter 9 of the air filter assembly 11 and then is supplied to the engine to work through the air outlet assembly 10, the honeycomb type pre-filter 5 is fixed on the outer wall of the assembly 6, the filtering of the gas is completed on the outer wall of the air inlet pipe assembly 6, the conveying of the gas is completed on the inner wall of the air inlet pipe assembly, two functions of filtering and conveying from the short distance from the outer wall to the inner wall are achieved, the outer wall is shortened, the appearance size of the system, the gas conveying pipeline is shortened, the appearance distance is reduced, and the resistance of the gas conveying pipeline, and the gas conveying pipeline is simpler and the gas conveying pipeline, and the application is reduced.

The engine works, the vehicle advances, vehicle vibration honeycomb formula pre-filter 5, hangs the dust in the honeycomb formula pre-filter 5 upside down and receives engine suction and gravity effect, produces the wriggling and holds a group phenomenon during the big amount of wind, forms large granule dust group, and large granule dust group receives gravity to overcome engine suction and breaks away from honeycomb formula pre-filter 5 during the little amount of wind, has reduced the dust volume of honeycomb formula pre-filter 5.

After the engine stops, the dust hung upside down in the honeycomb type pre-filter 5 loses the suction force of the engine, the dust with small adhesion force is separated from the honeycomb type pre-filter 5 under the action of air disturbance and gravity, and the dust amount of the honeycomb type pre-filter 5 is reduced.

After pulse gas of a pulse gas source 8 enters a pulse guide pipe 2, the pulse gas is released through an exhaust port 1, the pulse gas enters a space between a pre-filtering cavity 3 and an air outlet 4, and returns to the atmosphere through the air outlet 4, a honeycomb type pre-filter 5 and an air inlet 7, because the end face of the air inlet 7 faces to the ground, dust in the honeycomb type pre-filter 5 is inversely hung under the gravity of reverse pulse and the ground, the dust is easier to be stripped, the dust removal work is smoother, more dust is separated from the honeycomb type pre-filter 5, when a large amount of dust is discharged, a dust blocking plate 12 changes the direction of the dust, the dust is far away from an exhaust funnel and a device sensitive to the dust, and other losses are prevented.

After the air inlet direction of the honeycomb type precleaner 5 is adjusted, dust collected in the honeycomb type precleaner 5 is influenced by the gravity, part of dust escapes from the honeycomb type precleaner 5, when pulse reverse gas works, the dust and the gravity jointly combine to force, more dust escapes from the honeycomb type precleaner 5, and the dust removing effect is better.

Example 3

It is right to combine the attached drawing 3 the utility model discloses do further detailed description, empty assembly 11 of straining is interior installs main filter 9, be equipped with assembly gas outlet 10 in the main filter 9, empty assembly 11 outside of straining is equipped with dust guard 12, empty assembly 11 of straining is equipped with assembly intake pipe 6, filter 5 is in advance installed in assembly intake pipe 6, pre-filter 5 establishes the periphery at assembly intake pipe 6, pre-filter 5 adopts the tubbiness formula, filter 5 is equipped with air intake 7 in advance to the tubbiness formula, assembly intake pipe 6 connects prefiltration chamber 3, prefiltration chamber 3 connects tubbiness formula air outlet 4 of prefiltration filter 5, be equipped with gas vent 1 between prefiltration chamber 3 and the air outlet 4, gas vent 1 connects pulse conduit 2, pulse gas source 8 is connected to pulse conduit 2, air intake 7 and the atmosphere of filter 5 communicate with each other in advance to the tubbiness formula.

The engine work, gaseous by air intake 7 entering tubbiness formula precleaner 5, when gaseous through tubbiness formula precleaner 5 filters, the dust in the gas is collected in tubbiness formula precleaner 5 outside, gaseous through air outlet 4 after the filtration, prefiltration chamber 3 gets into assembly intake pipe 6, filter the back through the main filter 9 of empty assembly 11, by assembly gas outlet 10 supply engine work, gaseous filtration is accomplished at 6 outer walls of assembly intake pipe, gaseous transport is accomplished in assembly intake pipe 6, two kinds of functions are accomplished to a part, reduce the overall dimension of system, reduce the assembly degree of difficulty in using, shorten the gas conveying distance simultaneously, reduce pipeline air intake resistance.

After pulse gas of a pulse gas source 8 enters a pulse guide pipe 2, the pulse gas is released through an exhaust port 1, enters a space between a prefiltering cavity 3 and an air outlet 4, returns to the atmosphere through the air outlet 4, a barrel-shaped prefilter 5 and an air inlet 7, and under the action of the pulse gas, dust is separated from the barrel-shaped prefilter 5, so that the air inflow of an engine is ensured, and a dust baffle plate 12 changes the dust direction, is far away from an exhaust funnel and a dust sensitive device, and prevents loss.

Example 4

It is right to combine the attached drawing 4 the utility model discloses do further detailed description, install main filter 9 in the empty assembly 11 of straining, main filter 9 adopts the honeycomb, be equipped with assembly gas outlet 10 in the honeycomb main filter 9, the empty assembly 11 outside of straining is equipped with dust board 12, empty assembly 11 of straining is equipped with assembly intake pipe 6, filter 5 is in advance installed in assembly intake pipe 6, prefilter 5 is established in the periphery of assembly intake pipe 6, assembly intake pipe 6 runs through prefilter 5, prefilter 5 adopts the honeycomb, honeycomb prefilter 5 is equipped with air intake 7 in advance, assembly intake pipe 6 connects prefilter chamber 3, prefilter chamber 3 is connected to prefilter chamber 3, air intake 7 is towards ground, be equipped with gas vent 1 between prefilter chamber 3 and the air outlet 4, gas vent 1 connects pulse conduit 2, pulse conduit 2 connects pulse air supply 8, be equipped with interior sealing member 14 between assembly intake pipe 6 and the honeycomb prefilter 5, prefilter chamber 3 and the honeycomb prefilter 5 are equipped with outer packing pad 13.

The engine work, gaseous honeycomb formula prefilter 5 that gets into by air intake 7, filter through honeycomb formula prefilter 5, be equipped with outer sealing pad 13 between prefilter chamber 3 and the honeycomb formula prefilter 5, prevent that prefilter chamber 3 from having the short circuit emergence with the external world, dust in the gas is collected in honeycomb formula prefilter 5 with the mode of hanging upside down, gas after the filtration gets into assembly intake pipe 6 through prefilter chamber 3, by assembly intake pipe 6 leading-in empty assembly 11 in, filter the back through the main clarifier 9 of honeycomb formula of empty assembly 11 of straining, supply engine work by assembly gas outlet 10, two honeycomb filters have been adopted to this kind of structure, the dust removal effect has been improved, increase the air input of filter. An inner sealing element 14 is arranged between the assembly air inlet pipe 6 and the honeycomb type pre-cleaner 5, so that the short circuit phenomenon between the assembly air inlet pipe 6 and the outside is prevented.

The engine works, vibration is generated during vehicle running and is transmitted to the honeycomb type pre-cleaner 5, dust in the honeycomb type pre-cleaner 5 is subjected to dual effects of engine suction and gravity, wriggling and agglomeration are carried out, when the engine is in a low-speed state, large-particle dust agglomerates overcome the engine suction and are separated from the honeycomb type pre-cleaner 5 under the gravity, and after the engine stops, the dust hung upside down in the honeycomb type pre-cleaner 5 loses the engine suction and is subjected to the gravity, and more dust is separated from the honeycomb type pre-cleaner 5.

After pulse gas of a pulse gas source 8 enters a pulse guide pipe 2, the pulse gas enters an exhaust port 1 through the pulse guide pipe 2 and is released, the pulse gas enters a position between a pre-filtering cavity 3 and an air outlet 4, and returns to the atmosphere through the air outlet 4, a honeycomb pre-filter 5 and an air inlet 7, because the end face of the air inlet 7 faces to the ground, dust inversely hung in the honeycomb pre-filter 5 is subjected to double effects of reverse pulse gas blowing force and gravity, more dust is separated from the honeycomb pre-filter 5, a dust blocking plate 12 changes the direction of the dust, and the dust blocking plate is far away from an exhaust funnel and a dust sensitive device.

Example 5

It is right to combine the accompanying drawing 5 the utility model discloses do further detailed description, this embodiment is a repacking scheme of side air feed, empty assembly 11 of straining is interior to be installed main filter 9, be equipped with assembly gas outlet 10 in the main filter 9, empty assembly 11 of straining is equipped with assembly intake pipe 6, assembly intake pipe 6 is installed and is pre-filtered 5, pre-filtered 5 is established in assembly intake pipe 6 periphery one side, pre-filtered 5 adopts the honeycomb, honeycomb is pre-filtered 5 and is equipped with air intake 7, assembly intake pipe 6 connects prefiltration chamber 3, prefiltration chamber 3 connects honeycomb air outlet 4 of prefiltration filter 5, air intake 7 is towards ground, be equipped with gas vent 1 between prefiltration chamber 3 and the air outlet 4, pulse pipe 2 is connected to gas vent 1, pulse gas source 8 is connected to pulse pipe 2.

When the engine works, gas enters the honeycomb type precleaner 5 from the air inlet 7 and is filtered by the honeycomb type precleaner 5, dust in the gas is collected in the honeycomb type precleaner 5 in an inverted hanging mode, the filtered gas enters the assembly air inlet pipe 6 through the prefilter chamber 3 and is guided into the air filter assembly 11 through the assembly air inlet pipe 6, the gas is filtered by the main filter 9 of the air filter assembly 11 and is supplied to the engine to work through the assembly air outlet 10, the dust inverted in the honeycomb type precleaner 5 is subjected to the double effects of the suction force of the engine and the gravity to form large particle dust clusters, and when the engine is in a low rotating speed state, the large particle dust clusters overcome the suction force of the engine to be separated from the honeycomb type precleaner 5 under the action of the gravity, and the dust amount of the honeycomb type precleaner 5 is reduced. After the engine is stopped, the upside-down dust loses the suction force of the engine, and a part of dust is separated from the honeycomb prefilter 5 under the action of air disturbance and gravity, so that the dust amount of the honeycomb prefilter 5 is reduced.

After pulse gas of the pulse gas source 8 enters the pulse guide pipe 2, the gas is released from the exhaust port 1 through the pulse guide pipe 2, the pulse gas enters between the pre-filtering cavity 3 and the air outlet 4 and returns to the atmosphere through the air outlet 4, the honeycomb type pre-filter 5 and the air inlet 7, the end face of the air inlet 7 faces the ground, the pulse gas is hung upside down on dust in the honeycomb type pre-filter 5 and is subjected to double effects of blowing force and gravity of the pulse gas, and more dust is separated from the honeycomb type pre-filter 5.

Example 6

It is right to combine the accompanying drawing 6 the utility model discloses it is right to do further detailed description, the embodiment provides a repacking scheme of air feed down, empty assembly 11 of straining is interior installs main filter 9, be equipped with assembly gas outlet 10 in the main filter 9, empty assembly 11 of straining is equipped with assembly intake pipe 6, filter 5 is in advance installed in assembly intake pipe 6, pre-filter 5 establishes the upper portion at assembly intake pipe 6, assembly intake pipe 6 runs through pre-filter 5, pre-filter 5 adopts the honeycomb, honeycomb is equipped with air intake 7 in advance, air intake 7 is towards ground, assembly intake pipe 6 connects prefiltration chamber 3, prefiltration chamber 3 connects honeycomb air outlet 4 of prefiltration filter 5, prefiltration chamber 3 and air outlet 4 between the formula be equipped with gas vent 1, gas vent 1 connects pulse conduit 2, pulse conduit 2 connects pulse air supply 8.

When the engine works, air enters the honeycomb type prefilter 5 from the air inlet 7 and is filtered by the honeycomb type prefilter 5, dust in the air is collected in the honeycomb type prefilter 5 in an inverted hanging mode, the filtered air enters the assembly air inlet pipe 6 through the prefilter cavity 3 and is guided into the air filter assembly 11 through the assembly air inlet pipe 6, and the filtered air is supplied to the engine for working through the assembly air outlet 10 after being filtered by the main filter 9 of the air filter assembly 11.

When the engine works, the vehicle bumps, the dust hung upside down in the honeycomb type pre-filter 5 vibrates, the dust creeps under the double action of the suction force of the engine and the gravity to generate a lump of large-particle dust, the large-particle dust lump overcomes the suction force of the engine to separate from the honeycomb type pre-filter 5 under the action of the gravity when the engine is in a low rotating speed state, the dust amount of the honeycomb type pre-filter 5 is reduced, the engine stops, the dust hung upside down in the honeycomb type pre-filter 5 loses the suction force of the engine and separates from the honeycomb type pre-filter 5 under the action of the disturbance of the air and the gravity, and the dust amount in the system is also reduced.

After pulse gas of the pulse gas source 8 enters the pulse guide pipe 2, the pulse is released through the exhaust port 1, the pulse gas enters between the pre-filtering cavity 3 and the air outlet 4 and returns to the atmosphere through the air outlet 4, the honeycomb pre-filter 5 and the air inlet 7, the end face of the air inlet 7 faces the ground and is hung upside down on dust in the honeycomb pre-filter 5, and more dust is separated from the honeycomb pre-filter 5 under the double actions of blowing force and gravity of the pulse gas.

The shape of the prefilter and the main filter in the technology is not limited, and the prefilter and the main filter comprise: the barrel filter, the tower filter, the honeycomb filter, the pre-filter, the angle filter, the umbrella filter and the like can adopt a mode of mutually connecting the barrel filters in series and can also adopt a mode of mutually connecting the barrel filter and the honeycomb filter in series, and the implementation of the technical scheme is not influenced.

The working mode of the pulse system comprises the following steps: the pulse works once, twice, many times or the times can be adjusted, the modes comprise instant dust removal, time delay dust removal, timing dust removal, memory dust removal or manual dust removal and the like, the circuit working modes on the market are various, and the implementation and the application of the technology are not influenced.

The pre-filter is used in parallel with one or more branches, and the implementation of the technical scheme is not influenced.

The prior coarse filters have more technical classifications, the work load of the pre-filter is only relieved by using the coarse filters, the cyclone separators, the desert filters and the oil filters which are adopted at present are only one mode in the coarse filter technology, do not represent all the technologies, can be freely combined according to actual conditions, meet different special requirements, and do not influence the development and implementation of the technology.

The number of the shells can be divided into single or multiple shells according to different use, the connection mode comprises a series connection mode, a parallel connection mode or a mixed connection mode, and the implementation of the technical scheme is not influenced.

Claims

1. The utility model provides a prefiltering is from dust collector, includes gas vent (1), pulse conduit (2), pre-filters chamber (3), air outlet (4), pre-filter (5), air intake (7), empty assembly (11) of straining, assembly intake pipe (6), main filter (9), assembly gas outlet (10), its characterized in that: install main filter (9) in air filter assembly (11), be equipped with assembly gas outlet (10) in main filter (9), air filter assembly (11) are equipped with assembly intake pipe (6), assembly intake pipe (6) installation prefilter (5), prefilter (5) are equipped with air intake (7) and air outlet (4), prefilter chamber (3) are connected in assembly intake pipe (6), air outlet (4) of prefilter (5) are connected in prefilter chamber (3), be equipped with gas vent (1) between prefilter chamber (3) and air outlet (4), pulse duct (2) are connected in gas vent (1), pulse air supply (8) are connected in pulse duct (2).

2. The pre-filter self-dedusting apparatus as set forth in claim 1, wherein: the pre-filter (5) is of a honeycomb type.

3. The pre-filter self-dedusting apparatus as set forth in claim 1, wherein: the pre-filter (5) is in a barrel shape.

4. The pre-filtering self-dedusting apparatus as set forth in claim 2 or 3, wherein: the pre-filter (5) is arranged on the periphery of the assembly air inlet pipe (6).

5. The pre-filter self-dedusting apparatus of claim 4, wherein: the assembly air inlet pipe (6) penetrates through the pre-filter (5).

6. The pre-filter self-dedusting apparatus according to claim 2, wherein: the pre-filter (5) is arranged at the upper part of the air inlet pipe (6) of the assembly.

7. The pre-filter self-dedusting apparatus as set forth in claim 2, wherein: the pre-filter (5) is arranged on one side of the periphery of the assembly air inlet pipe (6).

8. The pre-filter self-dedusting apparatus as set forth in claim 1, wherein: the main filter (9) is honeycomb-shaped.

9. The pre-filter self-dedusting apparatus of claim 1, wherein: the air inlet (7) faces the ground.

10. The pre-filter self-dedusting apparatus of claim 1, wherein: a dust baffle plate (12) is arranged on the outer side of the air filter assembly (11).

11. The pre-filter self-dedusting apparatus as set forth in claim 1, wherein: an inner sealing element (14) is arranged between the assembly air inlet pipe (6) and the pre-cleaner (5).

12. The pre-filter self-dedusting apparatus of claim 1, wherein: an outer sealing gasket (13) is arranged between the prefiltering cavity (3) and the prefilter (5).