CN215138231U - Dust removal filtration system and suction vehicle - Google Patents

Abstract

The utility model provides a dust removal filtration system and suction car, dust removal filtration system include centrifugal dust collector and are located the material collection fill of centrifugal dust collector below, and centrifugal dust collector's top and bottom are equipped with top export and below export respectively, and the top export is suitable for and feeds through with the vacuum pump, and the below export is collected with the material and is fought the intercommunication, and the lateral wall that centrifugal dust collector kept away from below export one end is equipped with the feed inlet, and the feed inlet is suitable for and feeds through with the vacuum material jar and absorb dirty gas in the vacuum material jar. The utility model discloses in, the intake pipe of fighting and vacuum pump is collected to the material sets up respectively in centrifugal dust collector's below and top to utilize dusty gaseous flow direction and the separation filter principle of material dust in centrifugal dust collector, collect the fill with centrifugal dust collector and material on overall structure and design into integral type structure along the direction of gravity for whole car overall arrangement is compacter, reasonable, saves the occupation space to whole car.

Description

Dust removal filtration system and suction vehicle

Technical Field

The utility model relates to a special automobile technical field particularly, relates to a dust removal filtration system and suction car.

Background

At present, vacuum suction vehicles mainly comprise sewage suction vehicles, dredging vehicles, suction and discharge vehicles, excavating and suction vehicles and the like, and are widely applied to suction and dredging of sludge of urban sewers, transfer of steel plant dust, lossless excavation of municipal pipe networks and the like.

The vacuum suction vehicle is generally provided with a vehicle-mounted vacuum pump and a dust removal system, negative pressure is firstly generated to a material tank through the vehicle-mounted vacuum pump in the material suction process, materials are sucked into the material tank through a pipeline under the action of the negative pressure, dust-containing gas is firstly subjected to self-weight sedimentation in the tank, is separated and filtered through the dust removal system, and is finally discharged into the atmosphere through the vacuum pump.

The existing filtering system generally comprises a primary dust remover and a secondary dust remover, and the material tank, the primary dust remover and the secondary dust remover are mutually independent and sequentially connected through pipelines, so that the filtering system occupies a large space on the whole vehicle.

SUMMERY OF THE UTILITY MODEL

The utility model provides a problem be that filtration system is big to the occupation space of whole car.

For solving at least one aspect among the above-mentioned problem, the utility model provides a dust removal filtration system, include centrifugal dust collector and be located the material collection fill of centrifugal dust collector below, centrifugal dust collector's top and bottom are equipped with top export and below export respectively, the top export is suitable for with the vacuum pump intercommunication, the below export with the material is collected and is fought the intercommunication, centrifugal dust collector keeps away from the lateral wall of below export one end is equipped with the feed inlet, the feed inlet is suitable for with vacuum material jar intercommunication in order to absorb dirty gas in the vacuum material jar.

Compared with the prior art, the utility model provides a dust removal filtration system, top export and below export are set up respectively in centrifugal dust collector's top and bottom, and the intake pipe of fighting and vacuum pump is collected to the material sets up below and top at centrifugal dust collector respectively, make the material collect fight with below exit linkage and intake pipe and top exit linkage, thereby utilize dusty gaseous flow direction and the separation filter principle of material dust in centrifugal dust collector, collect fighting along gravity direction design formula structure as an organic whole with centrifugal dust collector and material on overall structure, make whole car overall arrangement compacter, rationally, save the occupation space to whole car.

Optionally, the vacuum pump further comprises a filtering device located above the upper outlet, and the filtering device is respectively communicated with the upper outlet and an air inlet pipe of the vacuum pump.

Optionally, the centrifugal dust removal device at least comprises two centrifugal dust removal cylinders, the vacuum material tank is communicated with one centrifugal dust removal cylinder through a conveying pipe, and the conveying pipe is tangentially connected with a cylinder body of the centrifugal dust removal cylinder.

Optionally, the vacuum material tank is provided with a valve for switching on and off the material collecting hopper and the vacuum material tank.

Optionally, still include positive pressure generator, positive pressure generator with the material collection fill intercommunication.

Optionally, the system further comprises a pipeline switching device connected with the vacuum pump, wherein the pipeline switching device is used for switching an air inlet pipe of the vacuum pump to be communicated with an air outlet of the vacuum pump so as to form positive pressure.

Optionally, the air supply pipe is communicated with the upper outlet.

Additionally, the utility model provides a suction vehicle, include as above dust removal filtration system.

Optionally, the dust removal filter system is connected to the outside of the vacuum material tank.

Optionally, still include vacuum pump and chassis, the vacuum pump, vacuum material jar with dust removal filtration system all sets up on the chassis, the vacuum pump includes the intake pipe, the intake pipe includes first section intake pipe and the second section intake pipe of mutual detachable connection, the second section intake pipe with dust removal filtration system connects, works as when vacuum material jar lifts up, first section intake pipe and the second section intake pipe breaks away from each other, dust removal filtration system follows vacuum material jar lifts up in step.

Compared with the prior art, the suction vehicle and the dust removal and filtration system have the same advantages compared with the prior art, and are not described again.

Drawings

FIG. 1 is a block diagram of a dust filtration system according to an embodiment of the present invention;

fig. 2 is a structural view of a suction vehicle according to an embodiment of the present invention;

FIG. 3 is an enlarged view of portion A of FIG. 2;

fig. 4 is a structural diagram of the suction vehicle in a lifting state according to the embodiment of the present invention.

Description of reference numerals:

1-centrifugal dust removal device, 11-upper outlet, 12-lower outlet, 13-centrifugal dust removal cylinder, 2-material collection hopper, 3-filtering device, 4-vacuum material tank, 5-vacuum pump, 51-air inlet pipe, 511-first section air inlet pipe, 512-second section air inlet pipe, 6-conveying pipe, 7-return pipeline, 71-valve, 8-chassis and 9-air supplement pipe.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of the words "a," "an," or "the" and similar referents in the specification and claims of the present application does not denote a limitation of quantity, but rather denotes the presence of at least one. The word "comprising" or "comprises", and the like, means that the element or item preceding the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items.

In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description of the present invention and simplification of description, but do not indicate or imply that the device or element to which the term refers must have a specific orientation, be constructed and operated in a specific orientation, and therefore, should not be construed as limiting the present invention. The utility model discloses a be provided with coordinate system YZ in the drawing of embodiment, wherein the place ahead is represented to the forward of Y axle, and the rear is represented to the reverse of Y axle, and the top is represented to the forward of Z axle, and the below is represented to the reverse of Z axle.

Furthermore, in the description of the present invention, it should be noted that the terms "first" and "second" mentioned in the embodiments of the present invention are only used for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," and "connected" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Some embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.

The embodiment of the utility model provides a dust removal filtration system combines fig. 1, fig. 2 and fig. 3 to show, include centrifugal dust collector 1 and be located hopper 2 is collected to the material of centrifugal dust collector 1 below, centrifugal dust collector 1's top and bottom are equipped with top export 11 and below export 12 respectively, top export 11 is suitable for the intake pipe 51 intercommunication with vacuum pump 5, below export 12 with hopper 2 intercommunication is collected to the material, centrifugal dust collector 1 keeps away from the lateral wall of below export 12 one end is equipped with the feed inlet, the feed inlet is suitable for and communicates with conveyer pipe 6, conveyer pipe 6 be suitable for carry the dirty gas of vacuum material jar 4 extremely centrifugal dust collector 1. The dashed arrows in fig. 1 indicate the flow direction of the dust-laden gas during the material suction process, and the spiral solid arrows indicate the rotation direction of the dust-laden gas in the centrifugal dust removing cylinder 13.

Wherein, the top and the bottom of the centrifugal dust removing device 1 respectively refer to the upper end surface and the lower end surface of the centrifugal dust removing device 1; the centrifugal dust removing device 1, the material collecting hopper 2 and the air inlet pipe 51 are hermetically connected with each other, the conveying pipe 6 and the centrifugal dust removing device 1 are hermetically connected with each other, namely, the dust removing and filtering system is provided with a sealed chamber; the material collecting hopper 2 is positioned right below the centrifugal dust removing device 1, so that the dust of the material conveyed to the centrifugal dust removing device 1 through the conveying pipe 6 can directly fall into the material collecting hopper 2 below through the lower outlet 12 under the action of centrifugal force and gravity; the length direction of the air inlet pipe 51 of the vacuum pump 5 is arranged along the front-back direction, and the upper outlet 11 is vertically communicated with the air inlet pipe 51, so that the gas of the dust-containing gas in the centrifugal dust removing device 1 after the centrifugal action can be conveniently discharged upwards through the upper outlet 11; the feed inlet of the centrifugal dust removing device 1 is positioned at a higher vertical position, so that the dust-containing gas entering the centrifugal dust removing device 1 can be fully filtered.

In the material suction process, earlier form the negative pressure to vacuum material jar 4 through vacuum pump 5, the material is in vacuum material jar 4 is inhaled from the external world under the negative pressure effect in, dirty gas subsides through the dead weight earlier in vacuum material jar 4, rethread conveyer pipe 6 gets into centrifugal dust collector 1, most material dust directly falls into material collection fill 2 under centrifugal force and gravity, the air current after straining the dust removal rises and enters into vacuum pump 5's intake pipe 51, at last, the atmosphere is discharged into through vacuum pump 5.

Dust removal filtration system in this embodiment, top export 11 and below export 12 are set up respectively to top and bottom at centrifugal dust collector 1, and the intake pipe 51 of fighting 2 and vacuum pump 5 is collected to the material sets up respectively in centrifugal dust collector 1's below and top, make the material collect fight 2 and below export 12 are connected and intake pipe 51 and top export 12 are connected, thereby utilize dusty gaseous flow direction and the separation filter principle of material dust in centrifugal dust collector 1, fight 2 along the direction of gravity design formula structure with centrifugal dust collector 1 and material collection on overall structure, make whole car overall arrangement compacter, it is reasonable, save the occupation space to whole car.

Optionally, as shown in fig. 1 and fig. 2, a filtering device 3 is further included, which is located above the upper outlet 11, and the filtering device 3 is respectively communicated with the upper outlet 11 and an air inlet pipe 51 of the vacuum pump 5.

Wherein, the filtering device 3 can be a filter cloth or a filter element, and the specific selection or structure can be designed according to the requirements of the use occasions; the filtering device 3 is arranged in the air inlet pipe 51 of the vacuum pump 5, so that the gas filtered by the centrifugal filtering device 1 can be filtered again; in addition, the filter device 3 may be installed in the upper outlet 11 to perform a secondary filtration of the gas filtered by the centrifugal filter device 1.

In the material suction process, dusty gas firstly subsides through the dead weight in vacuum material jar 4, and rethread conveyer pipe 6 gets into centrifugal dust collector 1, and most material dust directly falls into material collection fill 2 under centrifugal force and the action of gravity, and the air current after filtering and removing dust rises and enters into filter equipment 3, and further filtering separation is carried out to the dust in this air current through filter equipment 3 again, and the gas that has filtered at last is discharged into the atmosphere through vacuum pump 5.

In the dedusting and filtering system in the embodiment, the filtering device 3 is arranged above the centrifugal dedusting device 1, so that the filtering device 3, the centrifugal dedusting device 1 and the material collecting hopper 2 are integrally designed along the gravity direction, and the compact and reasonable layout of the whole vehicle is ensured; dust-containing gas is firstly removed by the centrifugal dust removing device 1 and then enters the filtering device 3, most of material dust directly falls into the material collecting hopper 2 under the action of centrifugal force and gravity, and only a small part of material dust is filtered and separated by the filtering device 3, so that the filtering device 3 is not easy to block, has longer service life and is also suitable for being applied to occasions with high requirements on the atmospheric emission quality; in addition, the filter device 3 is arranged at the top end, so that the filter device 3 is replaced more quickly in the later period.

Optionally, as shown in fig. 1, the centrifugal dust removing device 1 at least includes two centrifugal dust removing cylinders 13, and the conveying pipe 6 is tangentially connected to a cylinder of one of the centrifugal dust removing cylinders 13.

Wherein, every centrifugation dust removal section of thick bamboo 13 all sets up perpendicularly to ground, every centrifugation dust removal section of thick bamboo 13 communicates each other, conveyer pipe 6 sets up in parallel to ground, the feed inlet of centrifugation dust collector 1 sets up on the barrel wall of one of them centrifugation dust removal section of thick bamboo 13, conveyer pipe 6 is connected for the tangential with being connected of the barrel of centrifugation dust removal section of thick bamboo 13, this centrifugation dust removal section of thick bamboo 13 is the spiral case cross-sectional shape with the horizontal cross-sectional shape that conveyer pipe 6 is connected promptly, help the gaseous centrifugal filtration effect of the dusty gas of inputing centrifugation dust collector 1 through conveyer pipe 6 to be better.

When vacuum material jar had lift and transfer function, the material of collecting to fight the collection by the material can only manual discharge or through movable pipeline structure with the material flowback to the vacuum material jar in at present, leads to the flowback pipeline route longer, and the design is relatively more complicated.

Therefore, as shown in fig. 2 and fig. 3, the dust removal filter system further includes a return pipe 7, two ends of the return pipe 7 are respectively connected to the material collection hopper 2 and the vacuum material tank 4, and the return pipe 7 is provided with a valve 71 for opening and closing the return pipe.

Wherein, flow back pipeline 7 respectively with material collection fill 2 and vacuum material jar 4 sealing connection, when in material suction in-process, valve 71 is the off-state, flow back pipeline 7 promptly and vacuum material jar 4 do not switch on, when the material flowback, open valve 71, flow back pipeline 7 and vacuum material jar 4 this moment switch on, through the positive pressure effect after, the material in the material collection fill 2 can be flowback to in the vacuum material jar 4.

In the material suction process, the valve 71 of the backflow pipeline 7 of the material collecting hopper 2 is closed, negative pressure is formed on the vacuum material tank 4 through the vacuum pump 5 firstly, materials are sucked into the vacuum material tank 4 under the action of the negative pressure, dust-containing gas is firstly settled through self weight in the tank and then enters the centrifugal dust removal device 1, most of material dust directly falls into the material collecting hopper 2 under the action of centrifugal force and gravity, and air flow after dust removal rises to enter the filtering device 3 for further filtering separation and finally is discharged into the atmosphere through the vacuum pump.

In the material flow-back process, the valve 71 of the flow-back pipeline 7 of the material collecting hopper 2 is opened, positive pressure is formed in the dedusting and filtering system, and the material in the material collecting hopper 2 is flow-back into the vacuum material tank 4 through the flow-back pipeline 7 under the action of the positive pressure.

The dust removal filtration system in this embodiment, with the material collect return line 7 on fighting 2 and 4 lug connection of vacuum material jar, need not movable structural design, compare movable structural design pipeline's length shorter, it is higher to return to arrange efficiency.

Optionally, the device further comprises a positive pressure generator, and the positive pressure generator is communicated with the material collecting hopper 2.

Wherein, when the material flowback, vacuum pump 5 stop work, malleation generator work this moment to let the material collect and fight 2 interior production malleation, the dust in the material is collected and is fought 2 and can be rapidly flowback to vacuum material jar 4 through flowback pipeline 7 after receiving the malleation effect.

The dust removal filtration system in this embodiment adopts the malleation generator preparation malleation, and is with low costs, and it is effectual to flow back.

Optionally, the system further comprises a pipeline switching device connected with the vacuum pump 5, wherein the pipeline switching device is used for switching the air inlet pipe 51 of the vacuum pump 5 to be communicated with the air outlet of the vacuum pump 5 so as to form positive pressure.

The pipeline switching device comprises a rotating part connected to the air inlet pipe 51, and the air inlet pipe 51 can be connected with the air outlet of the vacuum pump 5 in an exchange manner by moving the rotating part; in the material suction process, the air inlet pipe 51 of the vacuum pump 5 is communicated with the air inlet, in the material backflow process, the air inlet pipe 51 of the vacuum pump 5 is switched to be communicated with the air outlet through the pipeline switching device, the direction of the air flow is the direction opposite to the flow direction in the material suction process at the moment, one part of the air flow in the opposite direction flows to the vacuum material tank 4 from the conveying pipe 6, the dust remained in the conveying pipe 6 can be brought back to the vacuum material tank 4 for precipitation, the other part of the air flow flows to the vacuum material tank 4 from the backflow pipeline 7, and the dust in the material collecting hopper 2 is conveyed to the vacuum material tank 4.

The dust removal filtration system in this embodiment, open the valve 71 of the back-flow pipeline 7 of the material collecting bucket 2 during the back-flow, vacuum pump 5 forms the malleation to vacuum material tank 4 through pipeline auto-change over device, and the material returns through the pipeline under the malleation effect and discharges in the vacuum material tank for the material dust of the material collecting bucket 2 can flow back smoothly.

Optionally, the material collecting hopper further comprises an air supply pipe 9 communicated with the upper outlet 11, when the material is sucked, the air supply pipe 9 is in a closed state, when the material is returned, the vacuum pump 5 stops working, the air inlet pipe 51 and the pipeline 6 are both closed, the air supply pipe 9 and the valve 71 are in an open state, and at the moment, the material in the material collecting hopper 2 is returned to the vacuum material tank 4 through the return pipeline 7 by using the residual negative pressure in the vacuum material tank 4.

Optionally, the volume of the return duct 7 is smaller than the volume of the delivery duct 6.

Wherein, the radial cross sectional area of conveyer pipe 6 is greater than the radial cross sectional area of flow back pipeline 7, and the length of conveyer pipe 6 is also greater than the length of flow back pipeline 7 to can ensure to return the in-process at the material, produced positive pressure can be with the material dust of material collection in the fill 2 preferentially discharge in vacuum material jar 4, thereby ensure the holistic effect of returning of system.

Another embodiment of the utility model provides a suction vehicle, include as above dust removal filtration system.

Suction car in this embodiment, top export 11 and below export 12 are set up respectively in centrifugal dust collector 1's top and bottom, and the intake pipe 51 of fighting 2 and vacuum pump 5 is collected to the material sets up respectively in centrifugal dust collector 1's below and top, make the material collect fight 2 and be connected with below export 12 and intake pipe 51 and top export 12 are connected, thereby utilize dusty gaseous flow direction and the separation filter principle of material dust in centrifugal dust collector 1, collect fighting 2 along the direction of gravity design formula structure with centrifugal dust collector 1 and material on overall structure, make whole car overall arrangement compacter, it is reasonable, save the occupation space to whole car.

The existing vacuum suction vehicle comprises a vacuum material tank, wherein a bag type dust collector and a centrifugal dust collector are arranged in the material tank, the centrifugal dust collector is arranged on the periphery of the bag type dust collector, the bag type dust collector and the centrifugal dust collector can lift or descend along with the material tank, materials collected by the centrifugal dust collector can directly fall into the material tank, but the bag type dust collector and the centrifugal dust collector are arranged in the vacuum material tank, the dust collector and the tank are welded, manufactured, installed and maintained extremely inconveniently, and the sealing requirements of the material tank and the dust collector are also high.

Thus, as shown in connection with fig. 2, the suction vehicle further comprises a vacuum material tank 4, said dust-removing filter system being connected to the outside of said vacuum material tank 4.

The centrifugal dust removal device 1, the filtering device 3, the material collecting hopper 2 and the vacuum material tank 4 are fixedly connected in a screw connection mode and the like and are uniformly distributed outside the vacuum material tank 4, so that the tank body welding manufacturing requirement of the vacuum material tank 4 is relatively lower, and the installation and maintenance are more convenient; in addition, the centrifugal dust removing device 1, the filtering device 3 and the material collecting hopper 2 are fixed in front of the vacuum material tank 4 and can be lifted and lowered along with the vacuum material tank 4.

Optionally, as shown in fig. 2 and fig. 4, the vacuum material tank further includes a vacuum pump 5 and a chassis 8, the vacuum pump 5, the vacuum material tank 4 and the dust-removing filter system are all disposed on the chassis 8, the vacuum pump 5 includes an air inlet pipe 51, the air inlet pipe 51 includes a first section air inlet pipe 511 and a second section air inlet pipe 512 which are detachably connected to each other, the second section air inlet pipe 512 is connected to the dust-removing filter system, when the vacuum material tank 4 is lifted, the first section air inlet pipe 511 and the second section air inlet pipe 512 are separated from each other, and the dust-removing filter system is lifted synchronously with the vacuum material tank 4.

In the material suction process, a valve 71 of a return pipeline 7 of a material collecting hopper 2 is closed, negative pressure is formed on a vacuum material tank 4 through a vacuum pump 5, materials are sucked into the vacuum material tank 4 under the action of the negative pressure, dust-containing gas is settled by self weight in the tank and then enters a centrifugal dust removal device 1 in a tangential direction, the centrifugal dust removal device 1 directly drops most of material dust into the material collecting hopper 2 by utilizing the action of gravity to carry out first-stage filtration, airflow after dust removal rises to enter a filtering device 3 to be further filtered and separated, the filtered gas is finally discharged into the atmosphere through the vacuum pump 5, and at the moment, a first section of air inlet pipe 511 and a second section of air inlet pipe 512 are connected with each other;

in the material backflow process, a valve 71 of a backflow pipeline 7 of a material collecting hopper 2 is opened, a vacuum pump 5 forms positive pressure on a vacuum material tank 4 through a pipeline switching device, the material in the material collecting hopper 2 is backflow into the vacuum material tank 4 through the backflow pipeline 7 under the action of the positive pressure, and at the moment, a first section of air inlet pipe 511 and a second section of air inlet pipe 512 are still connected with each other;

when the vacuum material tank 4 needs to be lifted, the first section air inlet pipe 511 and the second section air inlet pipe 512 are disconnected with each other, and the second section air inlet pipe 512 is lifted synchronously with the dust removal filtering system and the vacuum material tank 4; when the vacuum material tank 4 needs to be lowered, the second section of air inlet pipe 512 is lowered along with the dust removal filtering system and the vacuum material tank 4 synchronously until the first section of air inlet pipe 511 and the second section of air inlet pipe 512 are restored to be connected.

Although the present disclosure has been described above, the scope of the present disclosure is not limited thereto. Various changes and modifications may be made by those skilled in the art without departing from the spirit and scope of the present disclosure, and these changes and modifications are intended to fall within the scope of the present disclosure.

Claims (10)

1. The utility model provides a dust removal filtration system, its characterized in that includes centrifugal dust collector (1) and is located hopper (2) is collected to the material of centrifugal dust collector (1) below, the top and the bottom of centrifugal dust collector (1) are equipped with top export (11) and below export (12) respectively, top export (11) are suitable for and vacuum pump (5) intercommunication, below export (12) with hopper (2) intercommunication is collected to the material, centrifugal dust collector (1) is kept away from the lateral wall of below export (12) one end is equipped with the feed inlet, the feed inlet is suitable for and vacuum material jar (4) intercommunication in order to absorb dirty gas in the vacuum material jar (4).

2. A dust extraction filter system according to claim 1, further comprising a filter device (3) located above the upper outlet (11), the filter device (3) being in communication with the upper outlet (11) and an inlet duct (51) of the vacuum pump (5), respectively.

3. A dust-removing and filtering system as claimed in claim 1, wherein the centrifugal dust-removing device (1) comprises at least two centrifugal dust-removing cylinders (13), the vacuum material tank (4) is communicated with one of the centrifugal dust-removing cylinders (13) through a conveying pipe (6), and the conveying pipe (6) is tangentially connected with the cylinder body of the centrifugal dust-removing cylinder (13).

4. The dust removal and filtration system of claim 3, further comprising a return pipe (7), wherein two ends of the return pipe (7) are respectively communicated with the material collection hopper (2) and the vacuum material tank (4), and the return pipe (7) is provided with a valve (71) for opening and closing the return pipe.

5. A dust-removing and filtering system according to any one of claims 1-4, further comprising a positive pressure generator communicating with the material collecting hopper (2).

6. A dust-removing and filtering system according to any one of claims 1-4, further comprising a pipeline switching device connected with the vacuum pump (5), wherein the pipeline switching device is used for switching an air inlet pipe (51) of the vacuum pump (5) to be communicated with an air outlet of the vacuum pump (5) so as to form positive pressure.

7. A dust extraction and filtration system according to any one of claims 1 to 4, further comprising a gas supply pipe (9) in communication with the upper outlet (11).

8. A suction vehicle, characterized in that it comprises a dust-removing filter system according to any one of claims 1-7.

9. The suction vehicle according to claim 8, characterized in that it further comprises a vacuum material tank (4), the dust-removing filter system being connected to the outside of the vacuum material tank (4).

10. The suction vehicle according to claim 9, characterized by further comprising a vacuum pump (5) and a chassis (8), wherein the vacuum pump (5), the vacuum material tank (4) and the dust-removing and filtering system are all arranged on the chassis (8), the vacuum pump (5) comprises an air inlet pipe (51), the air inlet pipe (51) comprises a first section of air inlet pipe (511) and a second section of air inlet pipe (512) which are detachably connected with each other, the second section of air inlet pipe (512) is connected with the dust-removing and filtering system, when the vacuum material tank (4) is lifted, the first section of air inlet pipe (511) and the second section of air inlet pipe (512) are separated from each other, and the dust-removing and filtering system is lifted synchronously with the vacuum material tank (4).

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