Rice and flour product drying equipment

Abstract

The utility model discloses drying equipment for rice and flour products. The drying equipment comprises a case and a transmission assembly assembled in the case. A feeding area, a main drying area, a discharging area, a cleaning area and an auxiliary drying area are arranged in the machine box, and circulation arrangement is kept. The transmission assembly comprises a transmission roller, a plurality of groups of guide rollers and a conveyor belt wound on the guide rollers, and further comprises a gear motor in power connection with the transmission roller. Ventilation holes are evenly formed in the conveying belt, and the conveying belt is sequentially connected with the feeding area, the main drying area, the discharging area, the cleaning area and the auxiliary drying area. The bottoms of the main drying area and the auxiliary drying area are provided with a main air distribution plate and an auxiliary air distribution plate respectively, and the tops are connected with a main exhaust hood and an auxiliary exhaust hood respectively. A cleaning assembly is assembled in the cleaning area and used for cleaning the conveying belt. According to the conveyor belt cleaning device, efficient cleaning of the conveyor belt is achieved in the non-stop state, production efficiency and product quality are remarkably improved, labor intensity and cost are reduced, and remarkable economic and environment-friendly benefits are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of rice and flour product production equipment, in particular to a rice and flour product drying equipment. Background Art

[0002] The rice and flour drying equipment currently on the market often faces some inefficiencies during use. Due to their high stickiness, rice and flour products are prone to adhere to the conveyor belt or tray during the drying process. Traditional drying equipment usually lacks an effective online cleaning mechanism, so after the rice and flour products are dried, the equipment needs to be shut down for manual cleaning. This not only increases the complexity and labor intensity of the operation, but also leads to a significant reduction in production efficiency.

[0003] Especially in large-scale production environments, frequent shutdowns for cleaning can seriously affect the continuity and efficiency of the production line, increasing the production cycle and cost of the product. At the same time, since rice and flour products produce some grease and residue during the drying process, if these substances are not removed in time, it will not only affect the quality of subsequent products, but may also cause equipment wear and failure, further increasing maintenance costs. Utility Model Content

[0004] In view of the above-mentioned deficiencies in the prior art, the purpose of the utility model is to provide a rice and flour product drying equipment, which realizes efficient cleaning of the conveyor belt without stopping the machine, significantly improves production efficiency and product quality, reduces labor intensity and cost, and has significant economic and environmental benefits.

[0005] The technical solution adopted by the utility model to achieve the above-mentioned purpose is: a rice and flour product drying equipment, including a chassis and a transmission component assembled in the chassis, wherein the chassis is provided with a loading area, a main drying area, a unloading area, a cleaning area, and a secondary drying area which are arranged in a circulation manner.

[0006] The transmission component includes: a transmission roller and several groups of guide rollers rotatably installed in the chassis, a conveyor belt sequentially wound around the transmission roller and the guide roller, and a reduction motor that maintains a power connection with the transmission roller. Ventilation holes are evenly opened on the conveyor belt, and the conveyor belt sequentially connects the loading area, the main drying area, the unloading area, the cleaning area, and the auxiliary drying area.

[0007] It also includes a main air distribution plate and an auxiliary air distribution plate which are respectively arranged at the bottom of the main drying area and the auxiliary drying area. The tops of the main drying area and the auxiliary drying area are respectively connected to a main exhaust hood and an auxiliary exhaust hood.

[0008] Also included is a cleaning assembly installed in the cleaning area, wherein the cleaning assembly is used for cleaning the conveyor belt in the cleaning area.

[0009] In some of the implementations, in order to ensure that the rice and flour products after drying in the main drying area can be effectively separated from the conveyor belt in the unloading area by the help of gravity, and to avoid the cleaning liquid of the conveyor belt cleaned in the cleaning area from contaminating the conveyor belts in other areas, the following technical solutions are provided.

[0010] The loading area and the main drying area are arranged above the unloading area, the cleaning area and the auxiliary drying area. The cleaning area is arranged below the unloading area and the auxiliary drying area. The transmission roller is arranged between the main drying area and the unloading area. The unloading area is arranged below the transmission roller.

[0011] In some of the implementations, in order to ensure that the rice and flour products can be fed onto the conveyor belt from the loading area of ​​the chassis, and to ensure that the rice and flour products dried on the conveyor belt can be collected and discharged at the unloading area, the following technical solutions are provided.

[0012] The chassis is provided with a loading port, which is arranged above the loading area; a vertical partition is fixedly connected between the unloading area and the cleaning area, and a discharge slope is fixedly connected to the vertical partition and the side wall of the chassis in the unloading area, and the chassis is also provided with a unloading port connected to the discharge slope.

[0013] In some of the implementations, in order to ensure that the main air distribution plate and the auxiliary air distribution plate can be stably installed in the main drying area and the auxiliary drying area respectively, the following technical solutions are provided.

[0014] The main drying area is arranged directly above the cleaning area, a horizontally arranged main installation plate is fixedly connected between the main drying area and the cleaning area, and the main air distribution plate is fixedly installed on the main installation plate.

[0015] The auxiliary drying area is arranged directly below the loading area, a transverse partition is fixedly connected between the auxiliary drying area and the loading area, an auxiliary mounting plate is fixedly connected between the auxiliary drying area and the cleaning area, the auxiliary air distribution plate is fixedly installed on the auxiliary mounting plate, and the auxiliary exhaust hood is arranged below the transverse partition.

[0016] In some of the implementations, in order to ensure that the conveyor belt in the cleaning area can be effectively cleaned and at the same time ensure the cleanliness of the conveyor belt circulating to the secondary drying area and the loading area, the following technical solutions are provided.

[0017] Two groups of vertically arranged water-blocking plates are fixedly connected to the bottom of the cleaning area. The water-blocking plates divide the cleaning area into three groups of cleaning unit pools. Each group of cleaning unit pools is connected with a water inlet pipe and a water discharge pipe.

[0018] In some of the implementations, in order to ensure that the cleaning component is stably installed in the cleaning area and that the cleaning component can effectively clean the conveyor belt, the following technical solutions are provided.

[0019] The three groups of cleaning unit pools are each provided with a cleaning assembly, and the cleaning assembly includes an upper cleaning roller brush and a lower cleaning roller brush rotatably installed in a chassis, and the upper cleaning roller brush and the lower cleaning roller brush each include a plurality of groups arranged side by side, and the conveyor belt is arranged between the upper cleaning roller brush and the lower cleaning roller brush, and the ends of the upper cleaning roller brush and the lower cleaning roller brush are both fixedly connected with reversing gears for maintaining meshing.

[0020] The upper cleaning roller brushes in each cleaning assembly group are chain-driven by a combination of a transmission sprocket and a chain, and the lower cleaning roller brushes in two adjacent cleaning assemblies are chain-driven by a combination of a driving sprocket and a chain.

[0021] The end of one group of the lower cleaning roller brushes is connected to a driving motor, and the driving motor is fixedly installed on the outside of the chassis.

[0022] Beneficial effects of the utility model:

[0023] 1. Improve production efficiency: By integrating multiple cleaning unit pools and cleaning roller brush systems in the drying equipment, the conveyor belt can be cleaned online. In this way, during the drying process of rice and flour products, there is no need to stop the machine frequently for cleaning operations, which significantly improves the continuity and overall efficiency of production.

[0024] 2. Ensure drying quality: The cleaning system can effectively remove the residue and grease of rice and flour products on the conveyor belt, ensuring that the conveyor belt is always clean. This helps to avoid contamination of subsequent products by residues, thereby ensuring the drying quality of rice and flour products.

[0025] 3. Reduce labor intensity: Traditional equipment requires manual shutdown to clean the conveyor belt or pallet. This solution reduces the labor intensity of operators and the complexity of cleaning work through an automated cleaning system, thereby reducing labor costs.

[0026] In summary, this solution, through the innovative design of the cleaning system, achieves efficient cleaning of the conveyor belt without stopping the machine, significantly improves production efficiency and product quality, reduces labor intensity and costs, and has significant economic and environmental benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the structure of the utility model;

[0028] Figure 2 It is a structural schematic diagram of another perspective of the utility model;

[0029] Figure 3 It is a structural schematic diagram of the chassis contents of the utility model;

[0030] Figure 4 For the Figure 3 A front view of

[0031] Figure 5 This is a schematic diagram of the structure of the transmission component and the cleaning component.

[0032] In the figure: 1 chassis, 101 loading area, 102 main drying area, 103 unloading area, 104 cleaning area, 105 auxiliary drying area, 106 loading port, 107 vertical partition, 108 discharging slope, 109 unloading port, 110 main mounting plate, 111 horizontal partition, 112 auxiliary mounting plate, 113 water-blocking plate, 114 cleaning unit pool, 2 transmission components, 21 transmission roller, 22 guide roller, 23 conveyor belt, 24 reduction motor, 31 main air distribution plate, 32 auxiliary air distribution plate, 33 main exhaust hood, 34 auxiliary exhaust hood, 4 cleaning components, 41 upper cleaning roller brush, 42 lower cleaning roller brush, 43 reversing gear, 44 transmission sprocket, 45 drive sprocket, 46 drive motor. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0034] See also Figure 1-5 A rice and flour product drying device includes a chassis 1 and a transmission component 2 assembled in the chassis 1. The chassis 1 is provided with a loading area 101, a main drying area 102, a unloading area 103, a cleaning area 104, and a secondary drying area 105 which are arranged in a circulation manner.

[0035] The transmission component 2 includes: a transmission roller 21 and a plurality of guide rollers 22 rotatably installed in the chassis 1, a conveyor belt 23 sequentially wound around the transmission roller 21 and the guide roller 22, a reduction motor 24 that maintains a power connection with the transmission roller 21, and ventilation holes are evenly opened on the conveyor belt 23, and the conveyor belt 23 sequentially connects the loading area 101, the main drying area 102, the unloading area 103, the cleaning area 104, and the auxiliary drying area 105.

[0036] It also includes a main air distribution plate 31 and an auxiliary air distribution plate 32 which are respectively arranged at the bottom of the main drying area 102 and the auxiliary drying area 105. The tops of the main drying area 102 and the auxiliary drying area 105 are respectively connected to a main exhaust hood 33 and an auxiliary exhaust hood 34.

[0037] The cleaning device also includes a cleaning assembly 4 installed in the cleaning area 104 , and the cleaning assembly 4 is used for cleaning the conveyor belt 23 in the cleaning area 104 .

[0038] The transmission roller 21 and the guide roller 22 are reasonably arranged in the chassis 1 to ensure that the conveyor belt 23 can be stably arranged in the chassis 1. The reduction motor 24 is fixedly installed on the outside of the chassis 1. When it is running, the power is transmitted to the transmission roller 21. Driven by the reduction motor 24 and the transmission roller 21, the conveyor belt 23 is realized along the loading area 101--main drying area 102--unloading area 103--cleaning area 104--auxiliary drying area 105--loading area 101 to run reciprocatingly.

[0039] The produced rice and flour products are input from the loading area 101 of the chassis 1 to the conveyor belt 23, and pass through the main drying area 102 under the transmission action of the conveyor belt 23. The main air distribution plate 31 at the bottom of the main drying area 102 transports the hot air vertically upward, and the rice and flour products above are quickly dried after passing through the ventilation holes on the conveyor belt 23. The hot air after drying the rice and flour products carries evaporated water vapor, which is collected and discharged through the main exhaust hood 33.

[0040] Outwardly protruding support strips (not shown in the drawings) are evenly arranged on the outer surface of the conveyor belt 23, and the dried rice and flour products are placed on the support strips to prevent the rice and flour products from directly sticking to the outer surface of the conveyor belt 23 and affecting the ventilation effect of the ventilation holes, thereby further improving the drying efficiency and quality of the rice and flour products.

[0041] The rice and flour products are driven by the conveyor belt 23 into the unloading area 103 , and are separated from the conveyor belt 23 and collected under the action of gravity, and finally discharged to the outside of the chassis 1 .

[0042] The conveyor belt 23 passing through the unloading area 103 is in an idle state. After entering the cleaning area 104, it cooperates with the cleaning component 4 assembled therein to operate. The cleaning component 4 and the cleaning liquid added to the cleaning area 104 clean the conveyor belt 23 to clean the rice and flour product residues adhering to the conveyor belt 23.

[0043] After the cleaning process, the conveyor belt 23 runs to the auxiliary drying area 105, and the auxiliary air distribution plate 32 at the bottom of the auxiliary drying area 105 conveys the hot air vertically upward to dry the conveyor belt 23 through each layer of conveyor belts 23 here, so as to dry the residual moisture on the conveyor belt 23, and the evaporated moisture is carried by the hot air and collected and discharged from the auxiliary exhaust hood 34.

[0044] After being dried in the secondary drying area 105, the conveyor belt 23 further moves to the loading area 101 to start the next cycle.

[0045] In order to ensure that the rice and flour products after drying in the main drying area 102 can be effectively separated from the conveyor belt 23 in the unloading area 103 by the action of gravity, and to prevent the cleaning liquid of the conveyor belt 23 cleaned in the cleaning area 104 from contaminating the conveyor belts 23 in other areas, the following technical solution is provided.

[0046] The loading area 101 and the main drying area 102 are arranged above the unloading area 103, the cleaning area 104 and the auxiliary drying area 105. The cleaning area 104 is set lower than the unloading area 103 and the auxiliary drying area 105. The transmission roller 21 is arranged between the main drying area 102 and the unloading area 103. The unloading area 103 is arranged below the transmission roller 21.

[0047] The loading area 101 and the main drying area 102 are located above the inside of the chassis 1, and the conveyor belt 23 here is arranged horizontally to ensure that the rice and flour products are stably transmitted thereon. After the rice and flour products output from the main drying area 102 pass through the transition of the transmission roller 21, the rice and flour products are located below the conveyor belt 23, so that the rice and flour products fall into the unloading area 103 under the action of gravity.

[0048] In order to prevent the rice and flour products from adhering to the conveyor belt 23 and being difficult to fall due to gravity, a scraper is fixedly connected in the chassis 1 and arranged between the unloading area 103 and the cleaning area 104. The scraper is kept in contact with the conveyor belt 23. When the rice and flour products adhering to the conveyor belt 23 are transferred to the scraper position, they are scraped off by the scraper and fall into the unloading area 103.

[0049] In order to avoid spatial motion interference between the scraper and the support strips on the conveyor belt 23, the support strips are arranged along the length direction of the conveyor belt 23, and the scraper is provided with a clearance notch (not shown in the drawings) arranged opposite to the support strips.

[0050] Since the cleaning area 104 is arranged lower than the unloading area 103 and the main drying area 102 , the cleaning liquid therein can be prevented from entering the drying area or the unloading area 103 .

[0051] In order to ensure that the rice and flour products can be input to the conveyor belt 23 from the loading area 101 of the chassis 1, and to ensure that the rice and flour products dried on the conveyor belt 23 can be collected and discharged at the unloading area 103, the following technical solution is provided.

[0052] A loading port 106 is provided on the chassis 1 and is arranged above the loading area 101; a vertical partition 107 is fixedly connected between the unloading area 103 and the cleaning area 104, and a discharge slope 108 is fixedly connected to the vertical partition 107 and the side wall of the chassis 1 in the unloading area 103; a unloading port 109 connected to the discharge slope 108 is also provided on the chassis 1.

[0053] The setting of the feeding port 106 can ensure that the produced rice flour products are fed to the conveyor belt 23 in the feeding area 101. The setting of the vertical partition 107 can prevent the cleaning liquid in the cleaning area 104 from contaminating the rice flour products in the unloading area 103. The rice flour products transferred to the unloading area 103 fall under the action of gravity or the action of the scraper, and are received by the discharge slope 108, and finally discharged through the unloading port 109.

[0054] In order to ensure that the main air distribution plate 31 and the auxiliary air distribution plate 32 can be stably installed in the main drying area 102 and the auxiliary drying area 105 respectively, the following technical solution is provided.

[0055] The main drying area 102 is arranged directly above the cleaning area 104 . A horizontally arranged main installation plate 110 is fixedly connected between the main drying area 102 and the cleaning area 104 . The main air distribution plate 31 is fixedly installed on the main installation plate 110 .

[0056] The auxiliary drying area 105 is arranged directly below the loading area 101, a transverse partition 111 is fixedly connected between the auxiliary drying area 105 and the loading area 101, an auxiliary mounting plate 112 is fixedly connected between the auxiliary drying area 105 and the cleaning area 104, the auxiliary air distribution plate 32 is fixedly installed on the auxiliary mounting plate 112, and the auxiliary exhaust hood 34 is arranged below the transverse partition 111.

[0057] The setting of the main mounting plate 110 can ensure that the main air distribution plate 31 is stably installed thereon, while the setting of the auxiliary mounting plate 112 can ensure that the auxiliary air distribution plate 32 is stably installed thereon and prevent the cleaning liquid in the cleaning area 104 from overflowing into the drying area.

[0058] The setting of the transverse partition 111 can effectively prevent the hot air after drying in the secondary drying area 105 from carrying water vapor into the upper loading area 101, thereby avoiding contamination of the rice and flour products in the loading area 101.

[0059] The air inlet pipes on the main air distribution plate 31 and the auxiliary air distribution plate 32 extend from the side wall of the chassis 1 to facilitate connection with the heated dry hot air.

[0060] In order to ensure that the conveyor belt 23 in the cleaning area 104 can be effectively cleaned, and at the same time ensure the cleanliness of the conveyor belt 23 circulating to the secondary drying area 105 and the loading area 101, the following technical solution is provided.

[0061] Two groups of vertically arranged water baffles 113 are fixedly connected to the bottom of the cleaning area 104 . The water baffles 113 divide the cleaning area 104 into three groups of cleaning unit pools 114 . Each group of cleaning unit pools 114 is connected to a water inlet pipe and a drainage pipe.

[0062] The three groups of cleaning unit pools 114 are arranged sequentially from the unloading area 103 to the secondary drying area 105. The first group of cleaning unit pools 114 circulates clean water containing a mixed oil cleaning agent through matching water inlet pipes and drainage pipes to effectively clean the conveyor belt 23 here; the second and third groups of cleaning unit pools 114 circulate clean water through matching water inlet pipes and drainage pipes to clean the conveyor belt 23 with the cleaning agent attached.

[0063] In order to ensure that the cleaning assembly 4 is stably installed in the cleaning area 104 and to ensure that the cleaning assembly 4 can effectively clean the conveyor belt 23, the following technical solution is provided.

[0064] A cleaning assembly 4 is arranged in each of the three groups of cleaning unit pools 114. The cleaning assembly 4 includes an upper cleaning roller brush 41 and a lower cleaning roller brush 42 which are rotatably installed in the chassis 1. The upper cleaning roller brush 41 and the lower cleaning roller brush 42 each include a plurality of groups arranged side by side. The conveyor belt 23 is arranged between the upper cleaning roller brush 41 and the lower cleaning roller brush 42. The ends of the upper cleaning roller brush 41 and the lower cleaning roller brush 42 are fixedly connected with a reversing gear 43 which maintains meshing.

[0065] The upper cleaning roller brush 41 in each cleaning assembly 4 is chain-driven by a combination of a transmission sprocket 44 and a chain, and the lower cleaning roller brush 42 in two adjacent cleaning assemblies 4 is chain-driven by a combination of a driving sprocket 45 and a chain.

[0066] The end of one group of lower cleaning roller brushes 42 is connected to a driving motor 46 , and the driving motor 46 is fixedly installed on the outside of the chassis 1 .

[0067] The upper cleaning roller brush 41 and the lower cleaning roller brush 42 are linked via a reversing gear 43 so that the upper cleaning roller brush 41 and the lower cleaning roller brush 42 rotate in opposite directions to effectively clean the inner and outer surfaces of the conveyor belt 23 passing through.

[0068] For the same group of cleaning components 4, at least one group of transmission sprockets 44 is fixedly connected to the same end of each group of upper cleaning roller brushes 41, and the transmission sprockets 44 of two adjacent groups of upper cleaning roller brushes 41 are chain-driven to ensure that each group of upper cleaning roller brushes 41 operates synchronously.

[0069] For each cleaning component 4, at least one group of lower cleaning roller brushes 42 is fixedly connected with a driving sprocket 45, and two adjacent groups of driving sprockets 45 are connected by a chain. A single driving motor 46 can drive each cleaning component 4 to operate stably.

[0070] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0071] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A rice and flour product drying equipment, characterized in that: It comprises a chassis (1) and a transmission assembly (2) assembled in the chassis (1), wherein the chassis (1) is provided with a loading area (101), a main drying area (102), a unloading area (103), a cleaning area (104), and a secondary drying area (105) which are arranged in a cyclic manner; The transmission assembly (2) comprises: a transmission roller (21) and a plurality of guide rollers (22) rotatably mounted in the chassis (1), a conveyor belt (23) sequentially wound around the transmission roller (21) and the guide rollers (22), and a reduction motor (24) in power connection with the transmission roller (21), the conveyor belt (23) being evenly provided with ventilation holes, and the conveyor belt (23) sequentially connecting the loading area (101), the main drying area (102), the unloading area (103), the cleaning area (104), and the auxiliary drying area (105); It also comprises a main air distribution plate (31) and a secondary air distribution plate (32) respectively arranged at the bottom of the main drying area (102) and the secondary drying area (105); the tops of the main drying area (102) and the secondary drying area (105) are respectively connected to a main exhaust hood (33) and a secondary exhaust hood (34); It also includes a cleaning component (4) installed in the cleaning area (104), wherein the cleaning component (4) is used to clean the conveyor belt (23) in the cleaning area (104).

2. A rice and flour product drying equipment according to claim 1, characterized in that: The loading zone (101) and the main drying zone (102) are arranged above the unloading zone (103), the cleaning zone (104) and the auxiliary drying zone (105); the cleaning zone (104) is arranged below the unloading zone (103) and the auxiliary drying zone (105); the transmission roller (21) is arranged between the main drying zone (102) and the unloading zone (103); and the unloading zone (103) is arranged below the transmission roller (21).

3. A rice and flour product drying equipment according to claim 1, characterized in that: The chassis (1) is provided with a loading port (106), and the loading port (106) is arranged above the loading area (101); a vertical partition (107) is fixedly connected between the unloading area (103) and the cleaning area (104); a discharge slope (108) is fixedly connected to the vertical partition (107) and the side wall of the chassis (1) in the unloading area (103); and a unloading port (109) connected to the discharge slope (108) is also provided on the chassis (1).

4. The rice and flour product drying equipment according to claim 1, characterized in that: The main drying area (102) is arranged directly above the cleaning area (104); a horizontally arranged main installation plate (110) is fixedly connected between the main drying area (102) and the cleaning area (104); and the main air distribution plate (31) is fixedly mounted on the main installation plate (110); The auxiliary drying zone (105) is arranged directly below the loading zone (101); a transverse partition (111) is fixedly connected between the auxiliary drying zone (105) and the loading zone (101); an auxiliary mounting plate (112) is fixedly connected between the auxiliary drying zone (105) and the cleaning zone (104); the auxiliary air distribution plate (32) is fixedly mounted on the auxiliary mounting plate (112); and the auxiliary exhaust hood (34) is arranged below the transverse partition (111).

5. The rice and flour product drying equipment according to claim 1, characterized in that: Two groups of vertically arranged water baffles (113) are fixedly connected to the bottom of the cleaning area (104), and the water baffles (113) divide the cleaning area (104) into three groups of cleaning unit pools (114). Each group of cleaning unit pools (114) is connected to a water inlet pipe and a water outlet pipe.

6. A rice and flour product drying equipment according to claim 5, characterized in that: A cleaning assembly (4) is arranged in each of the three groups of cleaning unit pools (114), the cleaning assembly (4) comprising an upper cleaning roller brush (41) and a lower cleaning roller brush (42) rotatably mounted in the chassis (1), the upper cleaning roller brush (41) and the lower cleaning roller brush (42) each comprising a plurality of groups arranged side by side, the conveyor belt (23) being arranged between the upper cleaning roller brush (41) and the lower cleaning roller brush (42), and the ends of the upper cleaning roller brush (41) and the lower cleaning roller brush (42) are fixedly connected with a reversing gear (43) for maintaining meshing; The upper cleaning roller brush (41) in each group of cleaning assemblies (4) is chain-driven by a combination of a transmission sprocket (44) and a chain, and the lower cleaning roller brush (42) in two adjacent groups of cleaning assemblies (4) is chain-driven by a combination of a drive sprocket (45) and a chain; The end of one group of the lower cleaning roller brushes (42) is connected to a drive motor (46) in a power manner, and the drive motor (46) is fixedly mounted on the outside of the chassis (1).

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