A sweeping and dust reduction device and a cleaning equipment

Abstract

The present invention discloses a sweeping and brushing dust reduction device and a cleaning equipment. The sweeping and brushing dust reduction device includes a sweeping brush, a foam liquid system and a bubbling system. The foam liquid system includes a foam liquid storage box, a foam liquid delivery pipe, and an annular overflow pipe. The foam liquid stored in the foam liquid storage box is delivered to the annular overflow pipe adjacent to the sweeping brush through the foam liquid delivery pipe below, and then sprayed out through the foam liquid nozzle in the inner circle of the annular overflow pipe; the bubbling system includes an air supply device, an air delivery device, and an air flow nozzle arranged one-to-one with the annular overflow pipe. The air delivery device delivers the gas provided by the air supply device to each air flow nozzle, and the air flow nozzle is arranged relative to the inner circle of the annular overflow pipe. This scheme adopts a foam dust reduction method to effectively reduce the dust caused by the sweeping and brushing operation. Compared with the spray dust reduction method, this scheme can greatly reduce the water consumption and greatly improve the dust suppression efficiency; this scheme greatly reduces the volume of the water tank, eliminates the water pump and the high-pressure water circuit, simplifies the structure, and reduces the cost.

Description

Technical Field

[0001] The invention relates to the technical field of sanitation vehicles, and in particular to a sweeping and dust reduction device and a cleaning equipment. Background Art

[0002] Existing road sweeping equipment with sweeping brushes generally adopts the spray dust reduction method, that is, 2 to 3 high-pressure atomizing nozzles are arranged on the side where the sweeping brush touches the ground. The nozzles equipped with large-tonnage sweeping vehicles have a large flow rate, which can wet the area in front of the sweeping brush that has not been cleaned yet. The wet dust is stirred by the sweeping brush and becomes mud. After the operation, it is smeared on the ground to show strips of mud marks; for areas with little dust on the ground, a large amount of water remains on the ground in the area covered by the atomizing nozzle after the operation. Since small-tonnage road sweeping equipment cannot carry large water tanks, it can only use small-flow high-pressure atomizing nozzles for spray dust reduction. Due to the small spray volume, it has almost no effect on dust suppression. In general, the high-pressure atomizing nozzle is not effective for dust reduction of road sweeping equipment in driving operations. During operation, a large amount of visible dust still floats into the air to form secondary pollution.

[0003] Existing cleaning equipment has the following disadvantages:

[0004] 1) The existing spray dust suppression method is difficult to achieve a good dust suppression effect;

[0005] 2) The water consumption is large, and a larger water tank is required. On the basis of the limited vehicle volume, the layout space of the garbage bin and other accessories must be compressed. After the volume of the garbage bin is compressed, the effective volume for accommodating garbage is reduced, which is not conducive to the continuous operation of the road sweeper;

[0006] 3) The road sweeper needs to be filled with a tank of water when going out for operation. For a pure electric road sweeper, the increase in load will lead to an increase in power consumption, reducing the operating range of the road sweeper.

[0007] Therefore, how to effectively reduce dust on road cleaning equipment with sweeping brushes is a technical problem that technicians in this field currently need to solve. Summary of the invention

[0008] In view of this, the object of the present invention is to provide a sweeping brush dust reduction device, which can effectively reduce the dust caused by the sweeping brush operation of the road cleaning equipment with a sweeping brush, and has the advantages of simplifying the structure and saving energy. Another object of the present invention is to provide a cleaning equipment including the above-mentioned sweeping brush dust reduction device.

[0009] In order to achieve the above object, the present invention provides the following technical solutions:

[0010] A sweeping and dust reduction device, comprising:

[0011] sweep brush;

[0012] A foam liquid system, the foam liquid system comprising a foam liquid storage tank, a foam liquid delivery pipe, and an annular overflow pipe, the foam liquid delivery pipe is connected to the bottom of the foam liquid storage tank, the foam liquid delivery pipe is connected to at least one annular overflow pipe, the annular overflow pipe is located on one side of the sweeping brush, and at least one foam liquid nozzle is arranged along the circumferential direction on the inner circle of the annular overflow pipe;

[0013] The bubbling system comprises an air supply device, an air delivery device and air flow nozzles arranged one by one with the annular overflow pipe, the air delivery device delivers the gas provided by the air supply device to each of the air flow nozzles, and the air flow nozzles are located on one side of the annular overflow pipe and are arranged opposite to the inner circle of the annular overflow pipe.

[0014] Preferably, the sweeping brush includes a sweeping brush piece mounting disk and a sweeping brush piece installed below the sweeping brush piece mounting disk, a driving shaft that drives the sweeping brush piece mounting disk to rotate is connected above the sweeping brush piece mounting disk, the air supply device includes a fan blade that is located above the sweeping brush piece mounting disk and is coaxially fixed with the driving shaft, and a fan air inlet opened on the sweeping brush piece mounting disk, the air delivery device includes a fan volute covering one side of the air outlet of the fan blade, the fan volute includes a fan volute upper cover plate and a fan volute circumferential cover plate, a volute airflow channel for guiding the airflow is provided inside the fan volute, and the volute airflow channel is connected to the airflow nozzle.

[0015] Preferably, the volute airflow channel is extended and arranged around the outer circumference of the fan blade, and the volute airflow channel is connected to a diversion air duct, and the diversion air duct is connected to each of the airflow nozzles.

[0016] Preferably, the diverter air duct is arranged to extend along the outer circumference of the fan blade, and the air flow nozzle is an air outlet hole opened on the diverter air duct.

[0017] Preferably, the air outlet is opened at the lower end of the diversion air duct, and the annular overflow pipe is located below the sweeping blade mounting plate and is arranged one by one opposite to the air outlet.

[0018] Preferably, the foam liquid delivery pipe is connected to a foam liquid diversion pipe extending circumferentially around the sweeping brush, the foam liquid diversion pipe is connected to at least one foam liquid branch pipe below along its extension direction, and the end of the foam liquid branch pipe is connected to the annular overflow pipe.

[0019] Preferably, the foam liquid nozzle is a foam liquid injection hole opened in the inner circle of the annular overflow pipe.

[0020] Preferably, the height between the bottom of the foam liquid storage tank and the annular overflow pipe is 0.9m-1.1m, and the aperture of the foam liquid injection hole is 0.5mm-0.7mm.

[0021] The sweeping and brushing dust reduction device provided by the present invention comprises: a sweeping brush, a foam liquid system and a bubble blowing system. The foam liquid system comprises a foam liquid storage box, a foam liquid delivery pipe and an annular overflow pipe. The foam liquid stored in the foam liquid storage box is delivered to the annular overflow pipe adjacent to the sweeping brush through the foam liquid delivery pipe below, and then sprayed out through the foam liquid nozzle on the inner circle of the annular overflow pipe; the bubble blowing system comprises an air supply device, an air delivery device and air flow nozzles arranged in one-to-one correspondence with the annular overflow pipe. The air delivery device delivers the gas provided by the air supply device to each air flow nozzle, and the air flow nozzles are arranged relative to the inner circle of the annular overflow pipe.

[0022] The scheme works as follows:

[0023] When the brush is working, the foam liquid system continuously provides foam liquid and sprays it from the foam liquid nozzle. At the same time, the airflow provided by the bubble blowing system is continuously sprayed from the airflow nozzle. The sprayed airflow passes through the inner circle of the annular overflow pipe, and the sprayed foam liquid continuously forms many bubbles under the action of the jet airflow. Since the annular overflow pipe is located on one side of the brush, when the brush is working, the bubbles blown by the device will be distributed in the dust-raising area of ​​the brushing operation, and the dust generated by the brushing action will be captured by the outer surface of the bubble, thereby achieving the purpose of effective dust reduction.

[0024] The present invention has the following beneficial effects:

[0025] 1) In terms of effective dust suppression, this solution can effectively reduce the dust caused by sweeping and brushing operations, and fundamentally prevent the spread of dust. Compared with the spray dust suppression method, this solution can greatly reduce water consumption and greatly improve the dust suppression efficiency;

[0026] 2) In terms of energy saving, since foam dust reduction can be achieved without too much water, this solution greatly reduces the volume of the water tank, thereby increasing the effective volume of the garbage bin, further reducing the vehicle weight, and increasing the operating range of the electric cleaning equipment;

[0027] 3) Compared with dry road sweepers, since this solution does not require the installation of filter elements, it can also save parts and space and expand the volume of the garbage bin; compared with the spray dust reduction method, this solution can avoid ground watermarks or mud marks caused by spray dust reduction, and at the same time, the water pump and high-pressure water circuit used for spray dust reduction can be eliminated, saving manufacturing costs.

[0028] The present invention also provides a cleaning device including the above-mentioned sweeping brush dust reduction device. The derivation process of the beneficial effects produced by the cleaning device is generally similar to the derivation process of the beneficial effects brought by the above-mentioned sweeping brush dust reduction device, so it will not be repeated herein.

[0029] Preferably, the cleaning equipment is a road sweeper. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 It is a schematic diagram of the overall structure of the sweeping and dust reduction device in a specific embodiment of the present invention;

[0032] Figure 2 It is a partial structural cross-sectional view of a foam liquid system and a bubble blowing system in a specific embodiment of the present invention;

[0033] Figure 3 for Figure 2 A partial enlarged view of the structure of the middle airflow nozzle and the annular overflow pipe;

[0034] Figure 4 It is a schematic diagram of the inner structure of the volute of the fan blade in a specific embodiment of the present invention;

[0035] Figure 5 It is an isometric view of a sweeping and dust suppression device in a specific embodiment of the present invention;

[0036] Figure 6 A bottom view of a sweeping brush in a specific embodiment of the present invention;

[0037] Figure 7 It is a schematic diagram of the working principle of the foam dust reduction of the present invention.

[0038] Figures 1 to 7 middle:

[0039] 1-brush blade, 2-brush blade mounting plate, 3-fan volute circumferential cover plate, 4-fan volute upper cover plate, 5-fan blades, 6-drive shaft, 7-foam liquid storage box, 8-foam liquid delivery pipe, 9-foam liquid diversion pipe, 10-diversion air duct, 11-foam liquid branch pipe, 12-annular overflow pipe, 13-foam liquid nozzle, 14-air flow nozzle, 15-volute air flow channel, 16-fan air inlet, 17-bubble. DETAILED DESCRIPTION

[0040] The overall idea of ​​the sweeping and dust suppression device provided by the present invention is to use foam dust suppression to improve dust suppression efficiency, reduce water consumption, simplify the structure of the cleaning machine, and reduce costs.

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] Please refer to Figures 1 to 7 , Figure 1 It is a schematic diagram of the overall structure of the sweeping and dust reduction device in a specific embodiment of the present invention; Figure 2 It is a partial structural cross-sectional view of a foam liquid system and a bubble blowing system in a specific embodiment of the present invention; Figure 3 for Figure 2 A partial enlarged view of the structure of the middle airflow nozzle and the annular overflow pipe; Figure 4 It is a schematic diagram of the inner structure of the volute of the fan blade in a specific embodiment of the present invention; Figure 5 It is an isometric view of a sweeping and dust suppression device in a specific embodiment of the present invention; Figure 6 A bottom view of a sweeping brush in a specific embodiment of the present invention; Figure 7 It is a schematic diagram of the working principle of the foam dust reduction of the present invention.

[0043] In order to solve the dust problem of existing cleaning equipment such as sweeping vehicles and road sweepers with sweeping brushes during cleaning operations, the present invention provides a sweeping brush dust reduction device, including: a sweeping brush, a foam liquid system and a bubble blowing system;

[0044] The foam liquid system includes a foam liquid storage tank 7, a foam liquid delivery pipe 8, and an annular overflow pipe 12. The foam liquid delivery pipe 8 is connected to the bottom of the foam liquid storage tank 7. The foam liquid delivery pipe 8 is connected to at least one annular overflow pipe 12. The annular overflow pipe 12 is located on one side of the sweeping brush. The inner circle of the annular overflow pipe 12 is circumferentially arranged with at least one foam liquid nozzle 13.

[0045] The bubble blowing system includes an air supply device, an air delivery device and air flow nozzles 14 arranged one by one corresponding to the annular overflow pipe 12. The air delivery device delivers the gas provided by the air supply device to each air flow nozzle 14. The air flow nozzle 14 is located on one side of the annular overflow pipe 12 and is arranged opposite to the inner circle of the annular overflow pipe 12.

[0046] The scheme works as follows:

[0047] When the brush is working, the foam liquid system continuously provides foam liquid and sprays it from the foam liquid nozzle 13. At the same time, the airflow provided by the bubble blowing system is continuously sprayed from the airflow nozzle 14. The sprayed airflow passes through the inner circle of the annular overflow pipe 12. The sprayed foam liquid continuously forms many bubbles under the action of the jet airflow. Since the annular overflow pipe 12 is located on one side of the brush, when the brush is working, the bubbles blown by the device will be distributed in the dust-raising area of ​​the brushing operation, and the dust generated by the brushing action will be captured by the outer surface of the bubble, thereby achieving the purpose of effective dust reduction.

[0048] It should be noted that the bubbling system in the present scheme can be designed in a variety of ways. For example, the air supply device uses an air pump or an air compressor, the air delivery device uses an air delivery pipeline, and then an air flow nozzle 14 corresponding to the annular overflow pipe 12 is arranged at the end of the air delivery pipeline. This method requires an additional power supply or uses the power of a sanitation vehicle to provide electrical energy or kinetic energy for the air pump or air compressor. This design method can provide continuous high-speed airflow, thereby generating continuous bubbles for dust removal; in another preferred design scheme, the fan blades and the sweeping brush structure are directly integrated into a design. Because the sweeping brush is always rotating during operation, the power source that drives the sweeping brush is used to provide power to the fan blades at the same time, so that the fan blades and the sweeping brush structure rotate synchronously. During the rotation process, the fan blades can suck away part of the air. By designing a gas conveying structure on the side of the air outlet of the fan blades, these gases can be collected and utilized, thereby providing a continuous airflow for bubbling.

[0049] Preferably, the sweeping brush in the present scheme includes a sweeping brush plate mounting disk 2 and a sweeping brush plate 1 installed below the sweeping brush plate mounting disk 2, a driving shaft 6 for driving the sweeping brush plate mounting disk 2 to rotate is connected above the sweeping brush plate mounting disk 2, an air supply device includes a fan blade 5 located above the sweeping brush plate mounting disk 2 and coaxially fixedly connected to the driving shaft 6, and a fan air inlet 16 opened on the sweeping brush plate mounting disk 2, an air delivery device includes a fan volute covered on one side of the air outlet of the fan blade 5, the fan volute includes a fan volute upper cover plate 4 and a fan volute circumferential cover plate 3, a volute airflow channel 15 for guiding the airflow is provided inside the fan volute, and the volute airflow channel 15 is connected to the airflow nozzle 14. In this way, the fan volute upper cover plate 4 and the fan volute circumferential cover plate 3 can form a cavity on the air outlet side of the fan blade 5. The fan blade 5 rotates synchronously with the sweeping blade mounting plate 2 under the drive shaft 6. During the rotation of the fan blade 5, a negative pressure is generated below the fan air inlet 16 of the sweeping blade mounting plate 2, that is, please refer to Figure 1 , the pressure P below the brush installation plate 2 2 The pressure is lower than the external atmospheric pressure, so that the external air passes through the gaps between the sweeping blades 1 and enters the fan air inlet 16. Figure 1The arrow in the middle represents the air flow direction. The air entering the fan blades 5 is pressed into the volute airflow channel 15 under the continuous rotation of the blades. Since the airflow is blocked by the fan volute upper cover plate 4 and the fan volute circumferential cover plate 3, it can only be pressurized in the volute airflow channel 15 and ejected from the airflow nozzle 14.

[0050] Further preferably, the volute airflow channel 15 is arranged to extend around the outer periphery of the fan blade 5, and the volute airflow channel 15 is connected to the split air duct 10, and the split air duct 10 is connected to each airflow nozzle 14, such as Figure 4 With such arrangement, the split air duct 10 can be designed in various shapes and can be arranged according to the location where dust removal is required, so that the airflow on the air outlet side of the fan blade 5 can flow to multiple locations for bubble dust removal.

[0051] It should be noted that the split air duct 10 can have a variety of structures and arrangements, such as an annular duct arranged around the outer circumference of the fan blade 5, or a plurality of straight ducts arranged in parallel, etc. Figure 3 and 4 Preferably, the split air duct 10 in this solution is arranged to extend along the outer periphery of the fan blade 5, and the airflow nozzle 14 is an air outlet hole opened on the split air duct 10. The air sucked in by the fan blade 5 is along Figure 4 The arrow direction is pressed into the volute airflow channel 15. The present invention can design the aperture size of the air outlet according to factors such as the sweeping brush speed, airflow velocity and flow rate to ensure that the airflow ejected from the air outlet can fully contact the foam liquid ejected from the annular overflow pipe 12 and blow out continuous bubbles.

[0052] Further preferably, the air outlet is opened at the lower end of the diversion air duct 10, and the annular overflow pipe 12 is located below the sweeping blade mounting plate 2 and arranged one by one with the air outlet, such as Figure 3 As shown, the airflow ejected from the airflow nozzle 14 is along Figure 3 The direction of the middle arrow blows toward the inner circle of the annular overflow pipe 12 and forms bubbles with the sprayed foam liquid. Figure 2 , 3 As shown in Figures 5 and 7, since the area below the sweeping brush installation disk 2 is the main area where dust is generated, the present invention arranges the annular overflow pipe 12 below the sweeping brush installation disk 2 so that the blown bubbles can first contact the dusty air, thereby absorbing the dust to the greatest extent.

[0053] It should be noted that the foam liquid delivery pipe 8 in this solution is used to deliver the foam liquid in the foam liquid storage tank 7 to each annular overflow pipe 12. In order to simplify the structure and facilitate the layout, please refer to Figure 1 , Figure 2 , Figure 3 and Figure 5The foam liquid delivery pipe 8 is connected to a foam liquid diversion pipe 9 which is arranged to extend circumferentially around the sweeping brush. The foam liquid diversion pipe 9 is connected to at least one foam liquid branch pipe 11 below along its own extension direction. The end of the foam liquid branch pipe 11 is connected to an annular overflow pipe 12. Figure 5 It can be seen that the foam liquid diversion pipe 9 of this scheme is about half the length of the outer circumference of the sweeping brush, and is connected to a plurality of foam liquid branch pipes 11 below, and each foam liquid branch pipe 11 is connected to an annular overflow pipe 12 below.

[0054] Preferably, the foam liquid nozzle 13 is a foam liquid injection hole opened in the inner circle of the annular overflow pipe 12, such as Figure 3 shown.

[0055] It should be noted that when designing the foam liquid circulation pipeline, the size of the aperture of the foam liquid nozzle 13 and the size of the foam liquid nozzle 13 should be designed according to the foam liquid flow rate required for foam generation. Figure 1 The H value (i.e., the height from the bottom of the foam liquid storage tank 7 to the annular overflow pipe 12) and the aperture size of the foam liquid nozzle 13 determine the flow resistance of the foam liquid, while the H value determines the pressure of driving the foam liquid. Preferably, the height H from the bottom of the foam liquid storage tank 7 to the annular overflow pipe 12 is 0.9m to 1.1m, and the aperture of the foam liquid injection hole 13 is 0.5mm to 0.7mm.

[0056] Further preferably, in the embodiment of the present invention, H=1m, at which time the foam liquid pressure of the annular overflow pipe 12 (i.e. Figure 1 The pressure P in the foam liquid storage tank 7 1 and the pressure P of the annular overflow pipe 12 0 The pressure difference) is about 9800Pa, and the aperture size of the foam liquid nozzle 13 is 0.6mm to ensure that continuous bubbles can be generated.

[0057] In addition, the annular overflow pipe 12 in the present embodiment can be arranged not only below the sweeping brush mounting plate 2, but also at other positions where bubbles can be emitted to the sweeping brush, such as above, in front of, or behind the sweeping brush mounting plate 2, which will not be elaborated in this article.

[0058] The working principle of the sweeping and dust reduction device provided by the present invention is described below in conjunction with a specific use process:

[0059] During the sweeping operation, the fan blades 5 are connected to the same drive shaft 6 as the sweeping disc, so the fan blades 5 also work at the same time. The airflow of the fan blades 5 comes from the gaps between the sweeping blades 1. The air flows from around the sweeping blades 1 through the gaps between the sweeping blades 1, and enters the flow channel between the fan blades 5 through the fan air inlet 16. After the fan blades 5 do work on the airflow, it is discharged into the volute airflow channel 15, and then enters the diversion air duct 10. The airflow in the diversion air duct 10 is pressurized air. The high-pressure air is ejected from the airflow nozzle 14 and blown to the annular overflow pipe 12. Finally, the airflow and the foam liquid ejected from the foam liquid nozzle 13 form bubbles 17 together, as shown in FIG. Figure 7 shown.

[0060] Since the inlet air of the fan blade 5 comes from the area around the sweeping brush 1, and the area around the sweeping brush 1 is the dust-raising area, when the fan blade 5 is running, the airflow continuously moves from the surroundings to the inner cavity formed by the sweeping brush 1, which helps to prevent the dust from spreading outward. The dust-laden airflow forms bubbles 17 after being blown out, so this dust-laden airflow will be wrapped by the bubbles 17 to achieve effective dust reduction; in addition, the blown bubbles 17 are distributed in the sweeping dust-raising area, and the dust that is not sucked into the fan will be captured by the outer surface of the bubbles 17 to achieve effective dust reduction. The principle is as follows Figure 7 As shown, Figure 7 The arrows in the figure indicate the flow direction of the dust-laden air.

[0061] The present invention has the following beneficial effects:

[0062] 1) In terms of effective dust suppression, this solution can effectively reduce the dust caused by sweeping and brushing operations, and fundamentally prevent the spread of dust. Compared with the spray dust suppression method, this solution can greatly reduce water consumption (up to 90% water consumption) and greatly improve the dust suppression efficiency (increased by 3 to 5 times);

[0063] 2) In terms of energy saving, since foam dust reduction can be achieved without too much water, this solution greatly reduces the volume of the water tank, thereby increasing the effective volume of the garbage bin, further reducing the vehicle weight, and increasing the operating range of the electric cleaning equipment;

[0064] 3) Compared with dry road sweepers, since this solution does not require the installation of filter elements, it can also save parts and space and expand the volume of the garbage bin; compared with the spray dust reduction method, this solution can avoid ground watermarks or mud marks caused by spray dust reduction, and at the same time, the water pump and high-pressure water circuit used for spray dust reduction can be eliminated, saving manufacturing costs. The cost of the fan and foam liquid flow pipeline involved in the present invention is much lower than the cost of the high-pressure water circuit;

[0065] 4) The foam liquid storage tank 7 is arranged above the annular overflow pipe 12, and the foam liquid self-flow function can meet the flow demand without the need for a water pump;

[0066] 5) The power source for driving the sweeping brush is used to simultaneously drive the coaxial cross-flow fan to provide a blowing airflow for the foam liquid system, which can further simplify the structure and improve energy utilization.

[0067] The present invention also provides a cleaning device including the above-mentioned sweeping brush dust reduction device. The derivation process of the beneficial effects produced by the cleaning device is generally similar to the derivation process of the beneficial effects brought by the above-mentioned sweeping brush dust reduction device, so it will not be repeated herein.

[0068] Preferably, the cleaning equipment is a road sweeper.

[0069] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A sweeping and dust reduction device, characterized in that: include: sweep brush; A foam liquid system, the foam liquid system comprising a foam liquid storage tank (7), a foam liquid delivery pipe (8), and an annular overflow pipe (12), the foam liquid delivery pipe (8) being connected to the bottom of the foam liquid storage tank (7), the foam liquid delivery pipe (8) being connected to at least one annular overflow pipe (12), the annular overflow pipe (12) being located on one side of the sweeping brush, and at least one foam liquid nozzle (13) being arranged along the circumferential direction on the inner ring of the annular overflow pipe (12); A bubbling system, the bubbling system comprising an air supply device, an air delivery device and air flow nozzles (14) arranged one-to-one with the annular overflow pipe (12), the air delivery device delivering the gas provided by the air supply device to each of the air flow nozzles (14), the air flow nozzles (14) being located on one side of the annular overflow pipe (12) and arranged opposite to the inner circle of the annular overflow pipe (12); The sweeping brush comprises a sweeping brush piece mounting plate (2) and a sweeping brush piece (1) mounted below the sweeping brush piece mounting plate (2); a driving shaft (6) for driving the sweeping brush piece mounting plate (2) to rotate is connected above the sweeping brush piece mounting plate (2); the air supply device comprises a fan blade (5) located above the sweeping brush piece mounting plate (2) and coaxially fixedly connected to the driving shaft (6) and a fan air inlet (16) provided on the sweeping brush piece mounting plate (2); the air delivery device comprises a fan volute covering one side of the air outlet of the fan blade (5); the fan volute comprises a fan volute upper cover plate (4) and a fan volute circumferential cover plate (3); a volute airflow channel (15) for guiding airflow is provided inside the fan volute; the volute airflow channel (15) is communicated with the airflow nozzle (14); The foam liquid nozzle (13) is a foam liquid injection hole opened on the inner circle of the annular overflow pipe (12); The height between the bottom of the foam liquid storage box (7) and the annular overflow pipe (12) is 0.9 m to 1.1 m, and the diameter of the foam liquid injection hole is 0.5 mm to 0.7 mm.

2. The sweeping and dust suppression device according to claim 1, characterized in that: The volute airflow channel (15) is arranged to extend around the outer periphery of the fan blade (5), the volute airflow channel (15) is connected to a split air duct (10), and the split air duct (10) is connected to each of the airflow nozzles (14).

3. The sweeping and dust suppression device according to claim 2, characterized in that: The split air duct (10) is arranged to extend along the outer circumference of the fan blade (5), and the air flow nozzle (14) is an air outlet hole opened on the split air duct (10).

4. The sweeping and dust suppression device according to claim 3, characterized in that: The air outlet is opened at the lower end of the diversion air duct (10), and the annular overflow pipe (12) is located below the sweeping blade mounting plate (2) and is arranged opposite to the air outlet one by one.

5. The sweeping and dust reduction device according to any one of claims 1 to 4, characterized in that: The foam liquid delivery pipe (8) is connected to a foam liquid diversion pipe (9) which is arranged to extend around the circumference of the sweeping brush; the foam liquid diversion pipe (9) is connected to at least one foam liquid branch pipe (11) below the foam liquid branch pipe (9) along its own extension direction; and the end of the foam liquid branch pipe (11) is connected to the annular overflow pipe (12).

6. A cleaning device, characterized in that: It comprises the sweeping and dust reduction device as described in any one of claims 1 to 5.

7. The cleaning device according to claim 6, characterized in that: The cleaning equipment is a road sweeper.

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