A conveyor belt cleaning apparatus and method of use for in situ passive release of a cleaning agent

Abstract

The application relates to the conveyor field and particularly discloses a conveying belt cleaning device capable of releasing cleaning agent passively in situ and a use method, which comprises a tensioning vibration mechanism arranged on the inner side of a descending section of a conveying belt and a cleaning mechanism, a flushing mechanism and a drying mechanism arranged on the outer side of the descending section of the conveying belt and sequentially arranged along the running direction of the conveying belt; the tensioning vibration mechanism is used for driving the conveying belt to vibrate or making the conveying belt tensioned; the cleaning mechanism comprises a cleaning roller and a first lifting assembly; the cleaning roller comprises a roller body and a plurality of hollow roller hairs; the liquid outlet end of the hollow roller hair is provided with a passive valve; when the first lifting assembly drives the cleaning roller to ascend until the hollow roller hair is bent due to being extruded by the lower end surface of the conveying belt, the passive valve is opened, and the cleaning agent stored in the hollow roller hair is released. The application can realize passive release of the cleaning agent, thereby reducing the waste of the cleaning agent; meanwhile, the tensioning vibration mechanism improves the contact effect of the cleaning roller and the conveying belt, thereby improving the cleaning efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of conveyors, in particular to a conveyor belt cleaning device for passive release of cleaning agent in situ and a method of use. BACKGROUND

[0002] A belt conveyor uses a conveyor belt to transport materials and is widely used in the fields of material handling, raw material transportation for food or medicine processing, etc. Generally, after a period of use, dust and other impurities will adhere to the outer side of the conveyor belt. If the adhered impurities are not effectively cleaned, the materials transported by the conveyor belt will be easily contaminated, and therefore it is necessary to clean the conveyor belt.

[0003] At present, common cleaning devices for conveyor belts include a roller brush cleaning device, a scraper cleaning device, an alloy rubber cleaning device, etc., among which the roller brush cleaning device is most widely used. The cleaning roller is arranged on the lower side of the conveyor belt and contacts the conveyor belt, and the cleaning function is realized by the rotation of the cleaning roller. The conventional conveyor belt will usually become loose after a long period of use, which will affect the contact effect between the cleaning roller and the lower side of the conveyor belt and thus affect the cleaning effect. In addition, during the cleaning process of the cleaning roller for the conveyor belt, there is a lack of efficient cleaning agent spraying or applying method, which will easily cause waste of cleaning agent. SUMMARY

[0004] In order to improve the problems of loose conveyor belt affecting the cleaning effect and waste of cleaning agent, the present application provides a conveyor belt cleaning device for passive release of cleaning agent in situ and a method of use.

[0005] The conveyor belt cleaning device for passive release of cleaning agent in situ provided by the present application adopts the following technical solution:

[0006] A conveyor belt cleaning device for passive release of cleaning agent in situ, comprising a tensioning and vibrating mechanism arranged on the inner side of a descending section of a conveyor belt and a cleaning mechanism, a flushing mechanism and a drying mechanism arranged in sequence along the running direction of the conveyor belt on the outer side of the descending section of the conveyor belt.

[0007] The tensioning and vibrating mechanism is used to drive the conveyor belt to vibrate or make the conveyor belt tensioned.

[0008] The cleaning mechanism comprises a cleaning roller assembly, a conveying assembly, a power assembly and a first lifting assembly, wherein the cleaning roller assembly comprises a rotating cleaning roller, the cleaning roller comprises a roller body and a plurality of hollow roller hairs fixed to the outer periphery of the roller body, and the roller body is internally provided with a containing cavity for containing cleaning agent; the hollow roller hairs are elastic, one end of the hollow roller hairs is communicated with the containing cavity, and the other end of the hollow roller hairs is provided with a passive valve; the power assembly is used for driving the cleaning roller to rotate, the conveying assembly is used for conveying cleaning agent into the containing cavity, and the first lifting assembly is used for driving the cleaning roller assembly to lift; when the cleaning roller assembly is lifted, the hollow roller hairs are bent by being pressed by the lower end surface of the conveying belt, and the liquid pressure of the cleaning agent in the hollow roller hairs can drive the passive valve to open, so that the cleaning agent stored in the hollow roller hairs is released.

[0009] The flushing mechanism is used for flushing the conveying belt, and the drying mechanism is used for drying the conveying belt.

[0010] The application stores a small amount of cleaning agent in the hollow roller hairs, the hollow roller hairs are bent by being pressed when the hollow roller hairs abut against the lower end surface of the conveying belt, the liquid pressure of the cleaning agent in the hollow roller hairs drives the passive valve to open, and the release of the cleaning agent is realized. Compared with the traditional way of spraying cleaning agent in a large area, the application can realize the passive release of the cleaning agent in situ quickly and efficiently, directly acts on the conveying belt, and effectively reduces the waste of the cleaning agent.

[0011] In addition, the height of the cleaning roller assembly is adjusted by the first lifting assembly, the pressing degree of the hollow roller hairs by the conveying belt can be adjusted, the bending degree of the hollow roller hairs is adjusted, and the release amount of the cleaning agent is adjusted. Specifically, the closer the distance between the roller body and the lower end surface of the conveying belt, the greater the pressing degree of the hollow roller hairs by the conveying belt, the greater the bending degree of the hollow roller hairs, and the more the cleaning agent is released; the farther the distance between the roller body and the lower end surface of the conveying belt, the smaller the pressing degree of the hollow roller hairs by the conveying belt, the smaller the bending degree of the hollow roller hairs, and the less the cleaning agent is released.

[0012] Further, the passive valve comprises at least three fan-shaped valve pieces, the arc-shaped side of the fan-shaped valve pieces is fixed to the inner side wall of the hollow roller hair, and a plurality of the fan-shaped valve pieces are spliced into a circular shape and cover the liquid outlet end of the hollow roller hair; the fan-shaped valve pieces are elastic.

[0013] When the hollow roller hair is filled with cleaning agent and the hollow roller hair is not pressed by external force, a plurality of fan-shaped valve pieces are spliced into a circular shape and cover the liquid outlet end of the hollow roller hair, so as to hinder the cleaning agent in the hollow roller hair from flowing out, and because the cleaning agent has a certain viscosity and surface tension, the cleaning agent will not overflow from the liquid outlet end of the hollow roller hair. Further, when the hollow roller hair is not pressed by external force, the centrifugal force generated by the rotation of the roller body is not enough to throw the cleaning agent out of the hollow roller hair.

[0014] When the hollow roller hairs are filled with cleaning agent and are extruded by external force, the hollow roller hairs are bent, the pressure of the cleaning agent stored in the hollow roller hairs is increased, the liquid pressure in the hollow roller hairs drives the plurality of fan-shaped valve pieces to elastically deform and open outward, the passive valve is opened, and passive release of the cleaning agent is realized. When the external force extruding the hollow roller hairs is removed, the hollow roller hairs are restored from bending to straightness under the action of self-deformation force, the liquid pressure in the hollow roller hairs is reduced, and the plurality of fan-shaped valve pieces are reset under the action of self-deformation force and cover the liquid outlet end of the hollow roller hairs.

[0015] Further, the conveying assembly comprises a liquid storage tank for storing the cleaning agent, one side of the liquid storage tank is communicated with the containing cavity, and the other side of the liquid storage tank is connected with a pressure stabilizing air pump.

[0016] The cleaning agent in the liquid storage tank can enter the containing cavity through the pressure stabilizing air pump.

[0017] Further, the conveying assembly comprises a liquid storage tank for storing the cleaning agent, one side of the liquid storage tank is communicated with the containing cavity, and the other side of the liquid storage tank is connected with a pressure stabilizing air pump.

[0018] The cleaning agent in the liquid storage tank can enter the containing cavity through the pressure stabilizing air pump.

[0019] Further, the cleaning roller assembly further comprises a fixed part, the roller body is rotationally connected to the fixed part, the fixed part is connected to the conveying assembly, the roller body is connected to the power assembly, and a sealing structure is arranged between the fixed part and the roller body.

[0020] Further, the roller body comprises a hollow cylindrical shell, the internal space of the hollow cylindrical shell is the containing cavity, the fixed part comprises a sealing connector, the sealing structure comprises a first sealing part arranged on the inner circumferential side of one end of the hollow cylindrical shell and a second sealing part arranged on the outer circumferential side of the sealing connector, and the first sealing part and the second sealing part are sealingly matched; the fixed part is provided with a buffer flow channel penetrating along the axial direction of the fixed part, and the buffer flow channel is used for communicating the containing cavity and the conveying assembly.

[0021] The first sealing part and the second sealing part are sealingly matched to realize rotational sealing connection of the hollow cylindrical shell and the sealing connector.

[0022] Further, a plurality of solid roller hairs are arranged on the outer circumferential side of the roller body, and the solid roller hairs and the hollow roller hairs are alternately distributed on the outer periphery of the roller body.

[0023] The number ratio of the solid roller hairs and the hollow roller hairs can be adjusted according to the dirtiness of the conveying belt.

[0024] Further, the tensioning and vibrating mechanism comprises a sliding frame arranged inside the conveying belt in a lifting manner and a vibrating assembly for driving the sliding frame to reciprocate in the vertical direction, and a tensioning roller is arranged on the sliding frame in a rotating manner and abuts against the inside of the conveying belt.

[0025] Further, a horizontal sliding groove is arranged on the sliding frame, the vibrating assembly comprises a crankshaft reciprocating around a fixed point and a driving member for driving the crankshaft to reciprocate, and a free end of the crankshaft is arranged in the sliding groove in a sliding manner.

[0026] In the vibrating mode, the driving member drives the crankshaft to rotate, the free end of the crankshaft reciprocates along the sliding groove, thereby driving the sliding frame to reciprocate in the vertical direction, and further driving the tensioning roller to drive the conveying belt to vibrate in the vertical direction; in the tensioning mode, the driving member drives the crankshaft to rotate downward to be vertical, the sliding frame reaches the maximum displacement in the vertical direction, and the tensioning roller tensions the conveying belt. When cleaning the conveying belt, the vibrating mode or the tensioning mode can be used according to actual needs, the looseness of the conveying belt is compensated within a certain range, the contact effect of the cleaning roller and the conveying belt is improved, and the cleaning efficiency is improved.

[0027] The application also provides a use method of the conveying belt cleaning device for releasing the cleaning agent passively in situ, comprising the following steps:

[0028] The conveying belt is operated, and the cleaning roller rotates reversely relative to the conveying belt;

[0029] The cleaning agent is delivered into the accommodating cavity of the roller body through the delivery assembly, so that the cleaning agent is stored in the hollow roller hair from the accommodating cavity; the cleaning roller assembly is driven to ascend by the first lifting assembly until the hollow roller hair is bent by being pressed by the lower end surface of the conveying belt, the liquid pressure of the cleaning agent stored in the hollow roller hair drives the passive valve to open, and the cleaning agent stored in the hollow roller hair is released for cleaning the conveying belt;

[0030] In the cleaning process of the conveying belt, the conveying belt is vibrated or tensioned by the tensioning and vibrating mechanism, so as to improve the contact effect of the cleaning roller and the conveying belt;

[0031] The conveying belt is flushed and dried in sequence by the flushing mechanism and the drying mechanism.

[0032] In summary, the application has at least one of the following beneficial technical effects:

[0033] 1. Compared with the traditional way of spraying the cleaning agent in a large area, the application can realize the passive release of the cleaning agent in situ quickly and efficiently, directly act on the conveying belt, and effectively reduce the waste of the cleaning agent;

[0034] 2. By arranging the tensioning and vibrating mechanism, the vibrating mode or the tensioning mode is adopted to compensate for the looseness of the conveying belt within a certain range, so as to improve the contact effect of the cleaning roller and the conveying belt, and improve the cleaning efficiency.

[0035] 3. The cleaning mechanism and the drying mechanism are used to clean and dry the conveying belt in sequence, so that the conveying belt can be quickly recovered to the usable state;

[0036] 4. By adjusting the number ratio of the solid roller hair and the hollow roller hair, the rotating speed of the conveying belt and the cleaning roller, and the distance between the cleaning roller and the conveying belt, the cleaning mechanism can be applied to the cleaning of the conveying belt with different dirt levels. BRIEF DESCRIPTION OF DRAWINGS

[0037] Figure 1 is a schematic diagram of the overall structure of the embodiment of the present application;

[0038] Figure 2 is a schematic diagram of the structure of the main display rack of the embodiment of the present application;

[0039] Figure 3 is a schematic diagram of the structure of the main transmission conveying mechanism of the embodiment of the present application;

[0040] Figure 4 is a schematic diagram of the structure of the main cleaning mechanism and tensioning vibration mechanism of the embodiment of the present application;

[0041] Figure 5 is a schematic diagram of the structure of the first lifting assembly of the embodiment of the present application;

[0042] Figure 6 is a schematic diagram of the structure of the cleaning roller assembly of the embodiment of the present application;

[0043] Figure 7 is a schematic diagram of the structure of the cleaning roller assembly of the embodiment of the present application from another angle;

[0044] Figure 8 is a schematic diagram of the structure of the liquid storage tank of the embodiment of the present application;

[0045] Figure 9 is a schematic diagram of the overall structure of the cleaning roller of the embodiment of the present application;

[0046] Figure 10 is a schematic diagram of the cross-sectional view of the cleaning roller of the embodiment of the present application;

[0047] Figure 11 is a schematic diagram of the structure and working principle of the passive valve of the embodiment of the present application;

[0048] Figure 12 is a schematic diagram of the structure of the cleaning roller assembly fixing part of the embodiment of the present application, wherein (A) is a schematic diagram of the overall structure, and (B) is a cross-sectional view;

[0049] Figure 13 is a schematic diagram of the structure of the tensioning vibration mechanism of the embodiment of the present application;

[0050] Figure 14 Figure 1 is a structural schematic diagram of a sliding frame in a tensioning vibration mechanism according to an embodiment of the present application;

[0051] Figure 15 Figure 2 is a structural schematic diagram of a rinsing mechanism according to an embodiment of the present application;

[0052] Figure 16 Figure 3 is a structural schematic diagram of a drying mechanism according to an embodiment of the present application;

[0053] Figure 17 Figure 4 is a structural schematic diagram of a scraper assembly according to an embodiment of the present application;

[0054] Figure 18 Figure 5 is a structural schematic diagram of a drying roller assembly according to an embodiment of the present application.

[0055] Reference signs:

[0056] 1, pulley leg; 2, frame; 20, side wall plate; 21, bottom plate; 22, first support plate; 22a, first guide rod sliding sleeve; 23, second support plate; 23a, second guide rod sliding sleeve; 24, butterfly nut;

[0057] 3, cleaning mechanism;

[0058] 30, cleaning roller assembly; 31, cleaning roller; 310, roller body; 310a, rotating shaft; 310b, hollow cylindrical shell; 310c, solid roller hair; 310d, hollow roller hair; 310f, first sealing part; 311, fixed part; 311a, external threaded head; 311b, fixed pin hole; 311c, buffer flow channel; 311d, fixed shaft; 311e, second sealing part; 311f, sealing connector; 312, passive valve; 312a, fan-shaped valve plate; 301, first bearing support; 302, fixed support; 303, fixed pin; 304, first support;

[0059] 32, conveying assembly; 320, pressure stabilizing air pump; 321, first conveying hose; 322, liquid storage tank; 32201, tank body shell; 32202, piston; 32203, air cavity; 32204, cleaning agent cavity; 32205, air inlet; 32206, liquid outlet; 32207, liquid supplementing port; 323, second conveying hose; 324, internally threaded connector;

[0060] 33, power assembly; 330, first motor; 331, first motor support; 332, shaft coupling; 333, speed reducer; 334, large synchronous pulley; 335, small synchronous pulley; 336, synchronous belt;

[0061] 34. First lifting assembly; 340. Second motor; 341. Flange; 342. Threaded rod; 35. First lifting platform; 35a. Lifting guide rod; 35b. Support spring; 36. Internal threaded bracket; 36a. Internal threaded disc; 36b. Support rod;

[0062] 4. Tensioning vibration mechanism; 40. Third motor; 41. Third motor bracket; 42. Crankshaft; 43. Sliding frame; 43a. Slide groove; 43b. Tensioning roller bracket; 43c. Slider; 44. Guide rail; 45. Tensioning roller;

[0063] 5. Drying mechanism; 50. Scraper assembly; 501. Support platform; 502. Torsion spring; 503. Scraper; 503a. Fixed platform; 51. Drying roller assembly; 510. Second support; 511. Second bearing bracket; 512. Main drying roller; 512a. Wide strip roller fibers; 513. Auxiliary drying roller; 513a. Narrow strip roller fibers; 52. Hot air blower; 53. Second lifting assembly; 54. Second lifting platform;

[0064] 6. Transmission and conveying mechanism; 60. Transmission roller; 61. Support roller; 62. Conveyor belt; 63. Support frame; 64. Support rod; 65. Conveyor belt power assembly; 65a. Fourth motor; 65b. Gearbox; 65c. First sprocket; 65d. Second sprocket; 65e. Chain; 65f. Bearing housing; 65g. Protective housing;

[0065] 7. Main control box;

[0066] 8. Flushing mechanism; 8a. Water tank; 8b. Third delivery hose; 8c. Water pump; 8d. Fourth delivery hose; 8e. Flushing nozzle. Detailed Implementation

[0067] The following is in conjunction with the appendix Figures 1-18 This application will be described in further detail.

[0068] This application discloses an in-situ passive release cleaning agent conveyor belt cleaning device for cleaning conveyor belts of belt conveyors. (See also...) Figure 1 and Figure 2 The belt conveyor includes a frame 2 and a conveyor belt 62 mounted on the frame 2. Several pulley legs 1 are fixedly mounted on the lower part of the frame 2 for support. A transmission and conveying mechanism 6 for driving the conveyor belt 62 is mounted on the frame 2. A base plate 21 is fixedly mounted on the lower part of the frame 2, and side wall plates 20 are fixedly mounted on both sides of the conveyor belt 62.

[0069] Reference Figure 1 and Figure 2The belt cleaning device disclosed in the embodiment comprises a tensioning and vibrating mechanism 4 arranged inside a descending section of the belt 62, and a cleaning mechanism 3, a flushing mechanism 8 and a drying mechanism 5 arranged outside the descending section of the belt 62 and sequentially along the running direction of the belt 62.

[0070] With reference to Figure 2 and Figure 3 , the rack 2 is fixedly provided with a support net rack 63 and a plurality of support rods 64 for supporting the belt 62. The transmission conveying mechanism 6 comprises a transmission roller 60 and a support roller 61 rotatably arranged on the rack 2, and further comprises a belt power assembly 65 for driving the transmission roller 60 to rotate. The transmission roller 60 is rotatably arranged on the rack 2 through a bearing seat 65f, and the transmission roller 60 is used to drive the belt 62 to run, and the support roller 61 is used to support the belt 62.

[0071] Specifically, with reference to Figure 2 and Figure 3 , the belt power assembly 65 comprises a first sprocket 65c, a second sprocket 65d, a chain 65e, a fourth motor 65a and a speed reducer 65b. The fourth motor 65a is fixedly arranged on the rack 2, the speed reducer 65b is installed on the output end of the fourth motor 65a, the output end of the speed reducer 65b is connected to the first sprocket 65c, the second sprocket 65d is coaxially fixed to the transmission roller 60, and the chain 65e is tightly engaged between the first sprocket 65c and the second sprocket 65d. The rack 2 is also fixedly provided with a protection box 65g, which covers the outside of the belt power assembly 65, for protecting the belt power assembly 65.

[0072] The first sprocket 65c is driven to rotate by the fourth motor 65a, and under the transmission of the chain 65e and the second sprocket 65d, the transmission roller 60 rotates to drive the belt 62 to run. The outer periphery of the transmission roller 60 can be provided with anti-skid structures such as anti-skid belts to avoid relative sliding between the transmission roller 60 and the belt 62 as much as possible and improve the transmission efficiency.

[0073] With reference to Figure 4 , the cleaning mechanism 3 comprises a cleaning roller assembly 30, a conveying assembly 32, a power assembly 33 and a first lifting assembly 34. Further, with reference to Figure 6 and Figure 7The cleaning roller assembly 30 comprises a rotating cleaning roller 31, which comprises a roller body 310 and a plurality of roller hairs fixed to the outer periphery of the roller body 310. The roller body 310 is hollow and has an accommodating cavity for accommodating a cleaning agent. A power assembly 33 is configured to drive the cleaning roller 31 to rotate. A conveying assembly 32 is configured to convey the cleaning agent into the accommodating cavity. A first lifting assembly 34 is configured to drive the cleaning roller assembly 30 to lift and lower.

[0074] With reference to Figure 2 , Figure 4 and Figure 5 , the first support plate 22 is fixedly arranged on the base plate 21 and can be fixed to the pulley leg 1 through a butterfly nut 24 at the four corners. The first lifting platform 35 for carrying the cleaning roller assembly 30 is arranged on the first support plate 22 in a lifting manner. The first lifting assembly 34 is configured to drive the first lifting platform 35 to lift and lower.

[0075] With reference to Figure 5 , the first lifting assembly 34 comprises a second motor 340 fixedly arranged on the first support plate 22. The output end of the second motor 340 is fixedly connected with a threaded rod 342 through a flange plate 341. The threaded rod 342 is threadedly connected with an internally-threaded bracket 36. Specifically, the internally-threaded bracket 36 comprises an internally-threaded disc 36a threadedly connected with the threaded rod 342 and a plurality of vertical bracket rods 36b fixedly arranged on the upper end face of the internally-threaded disc 36a. The ends of the bracket rods 36b away from the internally-threaded disc 36a are fixedly connected with the lower end face of the first lifting platform 35.

[0076] In order to guide the lifting of the first lifting platform 35 in the vertical direction, with reference to Figure 5 , the four corners of the lower end face of the first lifting platform 35 are fixedly connected with lifting guide rods 35a, which penetrate the first support plate 22 in the vertical direction. The first support plate 22 is fixedly provided with a first guide rod sleeve 22a for the lifting guide rods 35a to penetrate. In order to buffer the lifting of the first lifting platform 35, the lifting guide rods 35a are externally sleeved with support springs 35b. The lower ends of the support springs 35b abut against the upper end face of the first support plate 22, and the upper ends of the support springs 35b abut against the lower end face of the first lifting platform 35.

[0077] The second motor 340 is configured to drive the threaded rod 342 to rotate. The threaded rod 342 is threadedly connected with the internally-threaded bracket 36. Under the guidance of the lifting guide rods 35a, the first lifting platform 35 is driven to lift and lower in the vertical direction.

[0078] With reference to Figure 6 and Figure 7Two first supports 304 are fixedly installed on the first lifting platform 35. One first support 304 is fixedly equipped with a fixed bracket 302, and the other first support 304 is fixedly equipped with a first bearing bracket 301. The roller body 310 is rotatably connected to the first bearing bracket 301, and the fixing part 311 is fixedly connected to the fixed bracket 302. The power assembly 33 is used to drive the roller body 310 to rotate.

[0079] Specifically, refer to Figure 6 The power assembly 33 includes a first motor 330, a reducer 333, a large synchronous pulley 334, a small synchronous pulley 335, and a synchronous belt 336. The first motor 330 is mounted on the first lifting platform 35 via a first motor bracket 331. The output end of the first motor 330 is connected to the reducer 333 via a coupling 332. The output end of the reducer 333 is connected to the large synchronous pulley 334. The small synchronous pulley 335 is coaxially fixed to the roller body 310. The synchronous belt 336 is tensioned and covers the large synchronous pulley 334 and the small synchronous pulley 335.

[0080] The first motor 330 drives the large synchronous pulley 334 to rotate, which in turn drives the roller 310 to rotate under the transmission of the synchronous belt 336 and the small synchronous pulley 335.

[0081] Reference Figure 6 and Figure 7 The conveying assembly 32 includes a liquid storage tank 322 for storing cleaning agent. One side of the liquid storage tank 322 is connected to a receiving cavity inside the roller body 310, and the other side is connected to a pressure-stabilizing air pump 320. Specifically, refer to... Figure 8 The liquid storage tank 322 includes a housing 32201. A piston 32202 is slidably disposed within the housing 32201. The piston 32202 divides the internal space of the liquid storage tank 322 into an air chamber 32203 and a cleaning agent chamber 32204 for containing cleaning agent. An air inlet 32205 is provided on one side of the air chamber 32203, and a liquid outlet 32206 and a replenishment port 32207 are provided on one side of the cleaning agent chamber 32204. The replenishment port 32207 is used to replenish cleaning agent into the liquid storage tank 322.

[0082] Reference Figure 6 , Figure 7 and Figure 8 The outlet of the pressure-stabilizing air pump 320 is connected to the air inlet 32205 of the liquid storage tank 322 via a first delivery hose 321, and the outlet 32206 of the liquid storage tank 322 is connected to the receiving cavity inside the roller body 310 via a second delivery hose 323. The pressure-stabilizing air pump 320 pressurizes the air cavity 32203 of the liquid storage tank 322, causing the piston 32202 in the liquid storage tank 322 to slide. Figure 8The horizontal arrow direction in the middle cavity 32203 indicates the sliding direction of the piston 32202), pushes the cleaner in the cleaner cavity 32204 of the liquid storage tank 322 into the containing cavity in the roller body 310 through the second delivery hose 323.

[0083] In another possible implementation, the delivery assembly 32 comprises a liquid storage tank 322 for storing the cleaner, the liquid storage tank 322 is communicated with the containing cavity, and the position of the liquid storage tank 322 is higher than the roller body 310. By using the gravity of the cleaner itself, the cleaner can be driven from the liquid storage tank 322 into the containing cavity in the roller body 310.

[0084] Referring to Figure 9 and Figure 10 , the roller body 310 comprises a hollow cylindrical shell 310b, and the internal space of the hollow cylindrical shell 310b is the containing cavity. The hollow cylindrical shell 310b is coaxially fixed to the small synchronous pulley 335 in the power assembly 33 through the rotating shaft 310a at one end thereof.

[0085] Referring to Figure 9 and Figure 10 , the roller hairs on the outer periphery of the roller body 310 comprise a plurality of hollow roller hairs 310d and a plurality of solid roller hairs 310c arranged in lines, and the hollow roller hairs 310d and the solid roller hairs 310c are alternately distributed on the outer periphery of the roller body 310. The number ratio of the solid roller hairs 310c and the hollow roller hairs 310d can be adjusted according to the dirtiness of the conveyor belt 62.

[0086] Referring to Figure 9 and Figure 10 , one end of the hollow roller hair 310d is communicated with the containing cavity in the hollow cylindrical shell 310b, and the other end of the hollow roller hair 310d is provided with a passive valve 312. Referring to Figure 11 , the passive valve 312 comprises at least three sector-shaped valve pieces 312a, and three, four, five or six can be provided. The arc-shaped side of the sector-shaped valve piece 312a is fixed to the inner side wall of the hollow roller hair 310d, and a plurality of sector-shaped valve pieces 312a are tightly jointed to cover the liquid outlet end of the hollow roller hair 310d in a circular shape.

[0087] The hollow roller hair 310d, the solid roller hair 310c and the sector-shaped valve piece 312a all have elasticity, and engineering plastics such as polypropylene (PP), polyvinyl chloride (PVC), high-density polyethylene (HDPE) or nitrile rubber (NBR) which are wear-resistant and have a certain elasticity can be selected as raw materials, and injection molding or 3D printing molding can be used for processing and manufacturing.

[0088] The cleaning agent in the storage tank 322 is injected into the receiving cavity inside the roller body 310 by the pressure-stabilizing air pump 320 until the receiving cavity is full of cleaning agent. The pressure-stabilizing air pump 320 continues to pressurize the storage tank 322, causing the cleaning agent in the receiving cavity to enter the hollow roller bristles 310d. During this process, the air pressure in the hollow roller bristles 310d drives multiple sector valve plates 312a to undergo slight elastic deformation and open outward, causing the passive valve 312 to open and the air in the hollow roller bristles 310d to be discharged until the hollow roller bristles 310d are full of cleaning agent. Subsequently, the air pressure of the pressure-stabilizing air pump 320 is reduced, causing the internal pressure of the hollow roller bristles 310d to decrease. The multiple sector valve plates 312a return to their original position under the action of their own deformation force, covering the liquid outlet end of the hollow roller bristles 310d.

[0089] When the hollow roller bristles 310d are filled with detergent and are not subjected to external pressure, multiple sector-shaped valve plates 312a are tightly joined together to form a circle covering the liquid outlet end of the hollow roller bristles 310d, preventing the detergent from flowing out. Simultaneously, due to the detergent's viscosity and surface tension, it also prevents the detergent from overflowing from the liquid outlet end of the hollow roller bristles 310d. Furthermore, when the hollow roller bristles 310d are not subjected to external pressure, the centrifugal force generated by the rotation of the roller body 310 is insufficient to eject the detergent from the hollow roller bristles 310d.

[0090] like Figure 11 As shown, when the hollow roller bristles 310d are filled with detergent and subjected to external pressure, the hollow roller bristles 310d bend, increasing the pressure of the detergent stored within. The liquid pressure inside the hollow roller bristles 310d drives multiple sector-shaped valve plates 312a to undergo elastic deformation and open outwards, opening the passive valve 312 and achieving passive release of the detergent. When the external force squeezing the hollow roller bristles 310d is released, the hollow roller bristles 310d return to straightness under their own deformation force, reducing the internal liquid pressure. The multiple sector-shaped valve plates 312a reset under their own deformation force, re-covering the liquid outlet end of the hollow roller bristles 310d.

[0091] In this embodiment, the external force squeezing the hollow roller bristles 310d is applied by the conveyor belt 62. Specifically, the first lifting component 34 drives the cleaning roller assembly 30 to rise, causing the hollow roller bristles 310d to bend under the pressure of the lower end face of the conveyor belt 62. The liquid pressure of the detergent inside the hollow roller bristles 310d can drive the passive valve 312 to open, releasing the detergent stored in the hollow roller bristles 310d. Compared with the traditional method of spraying detergent over a large area, this application can achieve rapid and efficient in-situ passive release of detergent, directly acting on the conveyor belt 62, effectively reducing detergent waste.

[0092] Further, by adjusting the height of the cleaning roller assembly 30 through the first lifting assembly 34, the degree of extrusion of the hollow roller hair 310d by the conveying belt 62 can be adjusted, so as to adjust the bending degree of the hollow roller hair 310d, and further adjust the release amount of the cleaning agent. Specifically, the closer the distance between the roller body 310 and the lower end surface of the conveying belt 62, the greater the degree of extrusion of the hollow roller hair 310d by the conveying belt 62, the greater the bending degree of the hollow roller hair 310d, and the more the cleaning agent is released; the farther the distance between the roller body 310 and the lower end surface of the conveying belt 62, the smaller the degree of extrusion of the hollow roller hair 310d by the conveying belt 62, the smaller the bending degree of the hollow roller hair 310d, and the less the cleaning agent is released. In this way, the release amount of the cleaning agent can be adjusted in real time according to the dirtiness of the conveying belt 62.

[0093] In the process of rotating the roller body 310, in order to ensure that the cleaning agent in the accommodation cavity does not leak, a sealing structure is arranged between the fixed part 311 and the roller body 310. Specifically, referring to (A) in Figure 12 , the fixed part 311 includes a fixed shaft 311d coaxially connected and a sealing connector 311f, the fixed shaft 311d is provided with a fixed pin hole 311b on the side, and the end of the fixed shaft 311d away from the sealing connector 311f is coaxially connected with an external thread head 311a. Further, referring to Figure 7 , the fixed support 302 is fixedly provided with an internal thread connector 324, and the second conveying hose 323 penetrates through the internal thread connector 324; the fixed support 302 is also slidingly provided with a fixed pin 303. The fixed pin 303 is inserted and matched with the fixed pin hole 311b, and the internal thread connector 324 is threadedly matched with the external thread head 311a, so as to realize the fixation of the fixed part 311 on the fixed support 302.

[0094] Referring to (A) in Figure 10 and Figure 12 , the sealing structure includes a first sealing part 310f arranged on the inner circumferential side of one end of the hollow cylindrical shell 310b and a second sealing part 311e arranged on the outer circumferential side of the sealing connector 311f, and the first sealing part 310f is sealingly matched with the second sealing part 311e. In this embodiment, the first sealing part 310f is two annular protrusions fixedly arranged on the inner circumferential side of one end of the hollow cylindrical shell 310b, and the second sealing part 311e is an annular groove arranged on the sealing connector 311f for accommodating the annular protrusions. By sealingly matching the first sealing part 310f with the second sealing part 311e, the rotating sealing connection of the hollow cylindrical shell 310b and the sealing connector 311f is realized.

[0095] Referring to (A) in Figure 12In (B) of the figure, the fixed part 311 is provided with a buffer flow channel 311c along the axial direction of the fixed part 311, and the buffer flow channel 311c is used to communicate the accommodating cavity and the conveying assembly 32. Specifically, the buffer flow channel 311c is communicated with the second conveying hose 323 at one end close to the external threaded head 311a, and is communicated with the accommodating cavity in the hollow cylindrical shell 310b at the other end away from the external threaded head 311a.

[0096] In order to improve the contact effect of the cleaning roller 31 and the conveying belt 62, the tensioning and vibrating mechanism 4 is used to drive the conveying belt 62 to vibrate or to tension the conveying belt 62. Referring to Figure 13 , the tensioning and vibrating mechanism 4 comprises a sliding frame 43 which is arranged on the inner side of the conveying belt 62 in a lifting manner, and a vibrating assembly which is used to drive the sliding frame 43 to reciprocate in the vertical direction. The sliding frame 43 is provided with a tensioning roller 45 which is arranged in a rotating manner on the sliding frame 43 and abuts against the inner side of the conveying belt 62.

[0097] Specifically, referring to Figure 13 and Figure 14 , the rack 2 is provided with guide rails 44 which are arranged on both sides of the rack 2 in a fixed manner and are vertical. The sliding frame 43 comprises a tensioning roller support 43b and sliding blocks 43c which are fixed to both sides of the tensioning roller support 43b. Each sliding block 43c is arranged in a sliding manner in the corresponding guide rail 44, and the tensioning roller 45 is arranged in a rotating manner on the tensioning roller support 43b.

[0098] Further, referring to Figure 13 and Figure 14 , the tensioning roller support 43b is provided with a horizontal sliding groove 43a, and the vibrating assembly comprises a crankshaft 42 which reciprocates around a fixed point and a driving member which is used to drive the crankshaft 42 to reciprocate. Specifically, the driving member is a third motor 40 which is arranged on the rack 2 in a fixed manner through a third motor support 41, and the third motor 40 can be a stepping motor, a servo motor, etc. The output end of the third motor 40 is fixedly connected with one end of the crankshaft 42, and the other end of the crankshaft 42, i.e. the free end of the crankshaft 42, is arranged in the sliding groove 43a in a sliding manner.

[0099] In the vibrating mode, the third motor 40 drives the crankshaft 42 to rotate, and the free end of the crankshaft 42 reciprocates along the sliding groove 43a, so as to drive the sliding frame 43 to reciprocate in the vertical direction, and further drive the tensioning roller 45 to drive the conveying belt 62 to vibrate in the vertical direction. In the tensioning mode, the third motor 40 drives the crankshaft 42 to rotate downward to be vertical, and the sliding frame 43 reaches the maximum displacement in the vertical direction, so as to make the tensioning roller 45 tension the conveying belt 62.

[0100] When cleaning the conveying belt 62, the vibrating mode or the tensioning mode can be used according to actual needs, and the looseness of the conveying belt 62 is compensated within a certain range, so as to improve the contact effect of the cleaning roller 31 and the conveying belt 62, and further improve the cleaning efficiency.

[0101] After the cleaning of the conveying belt 62, the conveying belt 62 is sequentially washed and dried by the washing mechanism 8 and the drying mechanism 5, so that the conveying belt 62 can quickly recover to a usable state.

[0102] Specifically, referring to Figure 15 , the washing mechanism 8 comprises a water tank 8a, a water pump 8c and a washing nozzle 8e, the water inlet end of the water pump 8c is connected to the water tank 8a through a third conveying hose 8b, the water outlet end of the water pump 8c is connected to the washing nozzle 8e through a fourth conveying hose 8d, and the washing nozzle 8e faces the lower end surface of the conveying belt 62.

[0103] Referring to Figure 1 and Figure 2 , the second support plate 23 is fixedly arranged on the bottom plate 21, and the second guide rod sleeve 23a is fixedly arranged on the second support plate 23. The second lifting platform 54 and the second lifting assembly 53 for driving the second lifting platform 54 to lift along the vertical direction are arranged on the second support plate 23, and the drying mechanism 5 is fixedly arranged on the second lifting platform 54. The structure of the second lifting assembly 53 is the same as that of the first lifting assembly 34, and will not be repeated here.

[0104] Further, referring to Figure 16 , the drying mechanism 5 comprises a scraper assembly 50, a drying roller assembly 51 and a hot air blower 52 arranged in sequence along the running direction of the conveying belt 62.

[0105] Referring to Figure 16 and Figure 17 , the scraper assembly 50 comprises a support table 501 fixedly arranged on the second lifting platform 54 and a scraper 503 rotatably arranged on the support table 501. Specifically, the scraper 503 is rotatably connected to the support table 501 through a rotating shaft. One side of the scraper 503 is fixedly connected with a fixed table 503a, a torsional spring 502 is sleeved on the rotating shaft, one end of the torsional spring 502 is fixedly connected with the fixed table 503a, and the other end of the torsional spring 502 is fixedly connected with the support table 501. The deformation force of the torsional spring 502 can drive the free end of the scraper 503 to elastically abut against the lower end surface of the conveying belt 62, and then the water adhering to the lower end surface of the conveying belt 62 is scraped off by the scraper 503.

[0106] Further, referring to Figure 18The drying roller assembly 51 comprises a second support 510 fixedly arranged on the second lifting platform 54, and a main drying roller 512 and a sub drying roller 513 rotatably arranged on the second support 510, and the main drying roller 512 and the sub drying roller 513 are rotatably connected with the second support 510 through corresponding second bearing supports 511. A plurality of wide strip roller hairs 512a are fixedly arranged on the outer periphery of the main drying roller 512, and a plurality of narrow strip roller hairs 513a are fixedly arranged on the outer periphery of the sub drying roller 513, and the wide strip roller hairs 512a and the narrow strip roller hairs 513a are made of water-absorbing materials. The main drying roller 512 and the sub drying roller 513 sequentially perform preliminary wiping and further wiping on the conveying belt 62; and after the wiping is completed, the conveying belt 62 is dried by using the hot air blower 52.

[0107] With reference to Figure 1 The rack 2 is provided with a general control box 7, and the starting and stopping of the motor, the constant pressure air pump 320 and other devices are controlled through the general control box 7.

[0108] The application further discloses a use method of the conveying belt cleaning device which releases the cleaning agent passively in situ, and the use method comprises three stages of cleaning, flushing and drying, and specifically comprises the following steps.

[0109] Step 1, the cleaning stage:

[0110] Firstly, the fourth motor 65a is started to drive the conveying belt 62 to operate.

[0111] Subsequently, the constant pressure air pump 320 is started to deliver the cleaning agent into the containing cavity of the roller body 310, so that the containing cavity is filled with the cleaning agent and the cleaning agent is stored in the hollow roller hair 310d; and the first motor 330 is started to drive the cleaning roller 31 to rotate reversely relative to the conveying belt 62.

[0112] The cleaning roller assembly 30 is driven to ascend by the first lifting assembly 34 until the hollow roller hair 310d is bent due to the extrusion of the lower end surface of the conveying belt 62, and the liquid pressure of the cleaning agent stored in the hollow roller hair 310d drives the passive valve 312 to open, so that the cleaning agent stored in the hollow roller hair 310d is released to clean the conveying belt 62. In this process, the constant pressure air pump 320 can be kept running to supplement the cleaning agent into the containing cavity.

[0113] During the cleaning of the conveying belt 62, the third motor 40 is driven to drive the crankshaft 42 to rotate or swing to the lowest point and then be stationary, so as to drive the conveying belt 62 to vibrate or be tensioned, so as to improve the contact effect between the cleaning roller 31 and the conveying belt 62.

[0114] After the cleaning is completed, the cleaning roller assembly 30 is driven to descend by the first lifting assembly 34, so that the cleaning roller 31 is away from the conveying belt 62.

[0115] Step 2, the flushing stage:

[0116] The water pump 8c is started, and the flushing nozzle 8e sprays water to the lower end surface of the conveying belt 62.

[0117] Step 3, drying stage:

[0118] The second lifting platform 54 is adjusted to a suitable height by the second lifting assembly 53, so that the scraper 503, the main drying roller 512 and the auxiliary drying roller 513 abut against the lower end surface of the conveying belt 62; during the operation of the conveying belt 62, the conveying belt 62 sequentially passes through the scraper 503, the main drying roller 512, the auxiliary drying roller 513 and the hot air machine 52, the scraper 503 scrapes off the water adhered to the conveying belt 62, the main drying roller 512 and the auxiliary drying roller 513 wipe the conveying belt 62, and the hot air machine 52 blows hot air to dry the conveying belt 62.

[0119] The above are preferred embodiments of the present application, and are not intended to limit the protection scope of the present application, so: any equivalent changes made on the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A conveyor belt cleaning apparatus for passive in situ release of a cleaning agent, characterised in that: The tensioning and vibrating mechanism is arranged inside the descending section of the conveying belt, and the cleaning mechanism, the flushing mechanism and the drying mechanism are arranged outside the descending section of the conveying belt and sequentially along the running direction of the conveying belt; The tensioning and vibrating mechanism is used for driving the conveying belt to vibrate or be tensioned; The cleaning mechanism comprises a cleaning roller assembly, a conveying assembly, a power assembly and a first lifting assembly, wherein the cleaning roller assembly comprises a cleaning roller arranged to rotate, the cleaning roller comprises a roller body and a plurality of hollow roller hairs fixed to the outer periphery of the roller body, and the inside of the roller body is provided with a containing cavity for containing cleaning agent; the hollow roller hairs are elastic, one end of each of the hollow roller hairs is communicated with the containing cavity, and the other end of each of the hollow roller hairs is provided with a passive valve; the power assembly is used for driving the cleaning roller to rotate, the conveying assembly is used for conveying cleaning agent into the containing cavity, and the first lifting assembly is used for driving the cleaning roller assembly to lift and lower; when the cleaning roller assembly is lifted, the hollow roller hairs are bent by being pressed by the lower end surface of the conveying belt, and the liquid pressure of the cleaning agent in the hollow roller hairs can drive the passive valve to open, so that the cleaning agent stored in the hollow roller hairs is released; the passive valve comprises at least three sector-shaped valve pieces, the arc-shaped side of each of the sector-shaped valve pieces is fixed to the inner side wall of the hollow roller hair, and a plurality of the sector-shaped valve pieces are spliced into a circular shape to cover the liquid outlet end of the hollow roller hair; the sector-shaped valve pieces are elastic; the cleaning roller assembly further comprises a fixed part, the roller body is rotatably connected to the fixed part, the fixed part is connected to the conveying assembly, the roller body is connected to the power assembly, and a sealing structure is arranged between the fixed part and the roller body. The flushing mechanism is used for flushing the conveying belt, and the drying mechanism is used for drying the conveying belt.

2. A conveyor belt cleaning device for in situ passive release of a cleaning agent according to claim 1, characterized in that: The conveying assembly comprises a liquid storage tank for storing cleaning agent, one side of the liquid storage tank is communicated with the containing cavity, and the other side of the liquid storage tank is connected with a pressure stabilizing air pump.

3. A conveyor belt cleaning device for in situ passive release of a cleaning agent according to claim 1, characterized in that: The conveying assembly comprises a liquid storage tank for storing cleaning agent, and the liquid storage tank is communicated with the containing cavity, and the position of the liquid storage tank is higher than that of the roller body.

4. A conveyor belt cleaning device for in-situ passive release of cleaning agent according to claim 1, characterised in that: The roller body comprises a hollow cylindrical shell, the inside space of the hollow cylindrical shell is the containing cavity, the fixed part comprises a sealing connector, the sealing structure comprises a first sealing part arranged on the inner peripheral side of one end of the hollow cylindrical shell and a second sealing part arranged on the outer peripheral side of the sealing connector, and the first sealing part and the second sealing part are sealingly matched; the fixed part is provided with a buffer flow channel penetrating along the axial direction of the fixed part, and the buffer flow channel is used for communicating the containing cavity and the conveying assembly.

5. A conveyor belt cleaning device for in-situ passive release of cleaning agent as claimed in claim 1, wherein: The outer peripheral side of the roller body is further provided with a plurality of solid roller hairs, and the solid roller hairs and the hollow roller hairs are alternately distributed on the outer periphery of the roller body.

6. A conveyor belt cleaning device for in-situ passive release of cleaning agent according to claim 1, characterised in that: The tensioning and vibrating mechanism comprises a sliding frame arranged to lift and lower inside the conveying belt and a vibrating assembly used for driving the sliding frame to reciprocatingly vibrate in the vertical direction, and a tensioning roller is rotatably arranged on the sliding frame and abuts against the inside of the conveying belt.

7. A conveyor belt cleaning apparatus for in situ passive release of a cleaning agent as claimed in claim 6, wherein: The sliding frame is provided with a horizontal sliding groove, the vibrating assembly comprises a crankshaft reciprocatingly swinging around a fixed point and a driving member used for driving the crankshaft to swing, and the free end of the crankshaft is slidingly arranged in the sliding groove.

8. A method of using a conveyor belt cleaning apparatus for in-situ passive release of a cleaning agent as claimed in any one of claims 1 to 7, characterised by: The conveying belt runs, and the cleaning roller rotates reversely relative to the conveying belt. The tensioning and vibrating mechanism is arranged inside the descending section of the conveying belt, and the cleaning mechanism, the flushing mechanism and the drying mechanism are arranged outside the descending section of the conveying belt and sequentially along the running direction of the conveying belt; The tensioning and vibrating mechanism is used for driving the conveying belt to vibrate or be tensioned; The cleaning mechanism comprises a cleaning roller assembly, a conveying assembly, a power assembly and a first lifting assembly, wherein the cleaning roller assembly comprises a cleaning roller arranged to rotate, the cleaning roller comprises a roller body and a plurality of hollow roller hairs fixed to the outer periphery of the roller body, and the inside of the roller body is provided with a containing cavity for containing cleaning agent; the hollow roller hairs are elastic, one end of each of the hollow roller hairs is communicated with the containing cavity, and the other end of each of the hollow roller hairs is provided with a passive valve; the power assembly is used for driving the cleaning roller to rotate, the conveying assembly is used for conveying cleaning agent into the containing cavity, and the first lifting assembly is used for driving the cleaning roller assembly to lift and lower; when the cleaning roller assembly is lifted, the hollow roller hairs are bent by being pressed by the lower end surface of the conveying belt, and the liquid pressure of the cleaning agent in the hollow roller hairs can drive the passive valve to open, so that the cleaning agent stored in the hollow roller hairs is released; the passive valve comprises at least three sector-shaped valve pieces, the arc-shaped side of each of the sector-shaped valve pieces is fixed to the inner side wall of the hollow roller hair, and a plurality of the sector-shaped valve pieces are spliced into a circular shape to cover the liquid outlet end of the hollow roller hair; the sector-shaped valve pieces are elastic; the cleaning roller assembly further comprises a fixed part, the roller body is rotatably connected to the fixed part, the fixed part is connected to the conveying assembly, the roller body is connected to the power assembly, and a sealing structure is arranged between the fixed part and the roller body. The flushing mechanism is used for flushing the conveying belt, and the drying mechanism is used for drying the conveying belt. The conveying assembly comprises a liquid storage tank for storing cleaning agent, one side of the liquid storage tank is communicated with the containing cavity, and the other side of the liquid storage tank is connected with a pressure stabilizing air pump. The conveying assembly comprises a liquid storage tank for storing cleaning agent, and the liquid storage tank is communicated with the containing cavity, and the position of the liquid storage tank is higher than that of the roller body. The roller body comprises a hollow cylindrical shell, the inside space of the hollow cylindrical shell is the containing cavity, the fixed part comprises a sealing connector, the sealing structure comprises a first sealing part arranged on the inner peripheral side of one end of the hollow cylindrical shell and a second sealing part arranged on the outer peripheral side of the sealing connector, and the first sealing part and the second sealing part are sealingly matched; the fixed part is provided with a buffer flow channel penetrating along the axial direction of the fixed part, and the buffer flow channel is used for communicating the containing cavity and the conveying assembly. The outer peripheral side of the roller body is further provided with a plurality of solid roller hairs, and the solid roller hairs and the hollow roller hairs are alternately distributed on the outer periphery of the roller body. The tensioning and vibrating mechanism comprises a sliding frame arranged to lift and lower inside the conveying belt and a vibrating assembly used for driving the sliding frame to reciprocatingly vibrate in the vertical direction, and a tensioning roller is rotatably arranged on the sliding frame and abuts against the inside of the conveying belt. The sliding frame is provided with a horizontal sliding groove, the vibrating assembly comprises a crankshaft reciprocatingly swinging around a fixed point and a driving member used for driving the crankshaft to swing, and the free end of the crankshaft is slidingly arranged in the sliding groove. The conveying belt runs, and the cleaning roller rotates reversely relative to the conveying belt. The cleaning agent is delivered into the accommodating cavity of the roller body by the delivery assembly, and is stored in the hollow roller hair from the accommodating cavity; the cleaning roller assembly is driven to ascend by the first lifting assembly until the hollow roller hair is bent by the lower end surface of the conveying belt, the liquid pressure of the cleaning agent in the hollow roller hair drives the passive valve to open, and the cleaning agent stored in the hollow roller hair is released for cleaning the conveying belt; During the cleaning process of the conveying belt, the conveying belt is vibrated or tensioned by the tensioning and vibrating mechanism, so that the contact effect of the cleaning roller and the conveying belt is improved; The conveying belt is sequentially washed and dried by the washing mechanism and the drying mechanism.

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