Online roller cleaning device

Abstract

The utility model relates to the technical field of cleaning equipment, and discloses an on-line roller cleaning device which comprises a roller, and the position, in contact with a pole piece, of the roller surface in the rotating process of the roller is defined as a rolling point of the roller; the first cleaning assembly comprises a first scraper, and a blade of the first scraper is in contact with the roller surface of the roller; the second cleaning assembly comprises a nozzle, a wiping rag and a second scraper, in the rotating direction of the roller, the nozzle is located on the side, close to the rolling point, of the wiping rag, the second scraper is located on the side, away from the rolling point, of the wiping rag, the nozzle is used for spraying water towards the upper side of the wiping rag, the wiping rag makes contact with the roller surface of the roller, and the second scraper is located at the bottom of the wiping rag; the blade of the second scraper is in contact with the roller surface of the roller. The first scraper, the wiping rag and the second scraper form a three-stage cleaning structure to clean the roller surface for three times, so that incomplete recovery of foreign matters or water spots is avoided, the foreign matter cleaning effect of the roller during low-speed rotation is improved, and the superior rate of pole pieces is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of cleaning equipment, in particular to an online roller cleaning device. Background Art

[0002] During the lithium battery production process, active materials need to be attached to the cathode and anode sheets. The active material attached to the anode sheet is primarily graphite. The electrode sheets are typically rolled during the molding process. The graphite on the anode sheet is active, and the active material frequently sticks to the rollers after rolling. When the electrode sheets are rolled again, decarburization, uneven spots, and other cosmetic issues may appear on the surface, affecting the quality of the electrode sheets. Therefore, the rollers must be cleaned online during lithium battery production to remove foreign matter sticking to the roller surface.

[0003] The patent with authorization announcement number CN200988048Y discloses a roller cleaning mechanism, including a scraper whose blade can continuously contact the outer peripheral surface of the roller and a wiping plate arranged behind the scraper along the direction of rotation of the roller and can continuously contact the outer peripheral surface of the roller. The side of the wiping plate that contacts the outer peripheral surface of the roller is provided with a wiping cloth, and also includes a bracket fixed relatively to the axis of the roller, and a spring whose elastic force can keep the scraper blade in contact with the outer peripheral surface of the roller; the scraper and the wiping plate are connected to the bracket; the scraper and the bracket form a pivot fit; one end of the spring is connected to the bracket and the other end is connected to the scraper.

[0004] The aforementioned roller cleaning mechanism uses a scraper and a rag to clean the roller surface, maintaining a high degree of roller cleanliness. In actual use, the roller surface cleanliness is also affected by the roller's rotational speed. When the roller rotates at high speed, the contact force between the scraper and rag and foreign matter stuck to the roller is strong, effectively removing foreign matter stuck to the roller. However, when the roller is at a low speed of less than 50m / min, the contact force between the scraper and rag and foreign matter is weak, and foreign matter stuck to the roller is not completely removed, affecting the electrode quality rate. Utility Model Content

[0005] The purpose of the utility model is to provide an online roller cleaning device to solve the problem that the cleaning mechanism in the prior art has poor cleaning effect on foreign matter sticking to the roller when the roller rotates at a low speed.

[0006] In order to achieve the above-mentioned purpose, the utility model provides an online roller cleaning device, comprising:

[0007] Roller, the position where the roller surface contacts the pole piece during the roller rotation is defined as the roller pressure point;

[0008] a first cleaning assembly, the first cleaning assembly comprising a first scraper, wherein a blade of the first scraper contacts a roller surface of the roller;

[0009] The second cleaning component includes a nozzle, a wiping cloth and a second scraper. In the rotation direction of the roller, the nozzle is located on the side of the wiping cloth close to the roller pressure point, and the second scraper is located on the side of the wiping cloth away from the roller pressure point. The nozzle is used to spray water toward the roller surface above the wiping cloth. The wiping cloth is in contact with the roller surface of the roller. The second scraper is located at the bottom of the wiping cloth, and the blade of the second scraper is in contact with the roller surface of the roller.

[0010] Preferably, the second cleaning assembly also includes a frame and a backing plate mounted on the frame, the backing plate is arranged on the upper side of the horizontal center line of the roller, the wiping cloth is fixedly mounted on the side of the backing plate close to the roller, and the second scraper is fixedly mounted on the frame and located at the bottom of the backing plate.

[0011] Preferably, the plate surface of the support plate close to the roller is a curved surface with a concave middle portion from top to bottom, and the wiping cloth is fixedly mounted on the curved surface.

[0012] Preferably, a first cylinder is fixedly mounted on the frame, the first cylinder is transmission-connected to the back plate, the back plate is slidingly mounted on the frame, and the first cylinder extends and retracts in a direction perpendicular to the axial direction of the roller to push the back plate away from or close to the roller.

[0013] Preferably, the second cleaning assembly further comprises a movable module, the movable module is fixedly connected to the frame, and the movable module is transmission-connected to the nozzle to drive the nozzle to approach or move away from the roller.

[0014] Preferably, the movable module includes a linear slide and a pushing cylinder, the linear slide is fixedly mounted on the frame, the linear slide extends along the axial direction of the roller, the pushing cylinder is guided and mounted on the slide, the extension and retraction direction of the pushing cylinder is perpendicular to the extension direction of the linear slide, and the nozzle is fixedly mounted on the end of the pushing cylinder away from the linear slide.

[0015] Preferably, the second cleaning assembly further comprises a cylindrical knife holder, which is arranged parallel to and spaced from the roller, and is rotatably mounted on the frame. The knife holder has a knife groove, and the second scraper is mounted in the knife groove.

[0016] Preferably, the second cleaning assembly further includes a water receiving box, which is arranged at the bottom of the blade holder and is communicated with the blade groove.

[0017] Preferably, the first cleaning component further includes a powder receiving groove, and the powder receiving groove is arranged at the bottom of the first scraper.

[0018] Preferably, the distance between the first scraper and the second scraper along the circumference of the roller is greater than two-fifths of the circumference of the roller.

[0019] Compared with the prior art, the online roller cleaning device of the embodiment of the utility model has the following beneficial effects: when the roller rotates, the blade of the first scraper of the first cleaning component is always in contact with the roller surface of the roller to clean foreign matter on the roller surface; when the roller surface of the roller rotates from the roller pressure point to the second cleaning component, the nozzle of the second cleaning component first sprays water to the roller surface on the upper side of the wiping cloth to wet the roller surface of the roller, and then the wiping cloth contacts the moistened roller surface and cleans the roller surface of the roller in real time, and then the blade of the second scraper is always in contact with the roller surface cleaned by the wiping cloth, and the blade can not only scrape off the remaining foreign matter, but also clean the remaining water stains on the roller surface; the first scraper, the wiping cloth and the second scraper form a three-level cleaning structure, which cleans the roller surface three times in total, avoiding incomplete recovery of foreign matter or water stains, improving the foreign matter cleaning effect of the roller when the roller rotates at low speed, and improving the quality rate of the electrode. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a structural diagram of the online roller cleaning device of the utility model;

[0021] Figure 2 This is a schematic diagram of the assembly structure of the first cleaning component and the roller of the online roller cleaning device of the utility model;

[0022] Figure 3 This is a structural schematic diagram of the second cleaning component of the online roller cleaning device of the present invention;

[0023] Figure 4 yes Figure 3 A cross-sectional view of a second cleaning component.

[0024] In the figure, 1. upper roller, 2. lower roller, 3. roller pressure point, 4. first cleaning component, 41. first scraper, 42. clamping plate, 5. second cleaning component, 51. nozzle, 52. rag, 53. second scraper, 54. frame, 55. support plate, 56. first cylinder, 57. linear slide, 58. pushing cylinder, 59. tool holder, 591. tool groove, 6. water collecting box, 7. powder collecting trough. DETAILED DESCRIPTION

[0025] The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0026] A preferred embodiment of an online roller cleaning device of the present utility model is as follows Figures 1 to 4As shown, the online roller cleaning device includes a roller, a first cleaning assembly 4, and a second cleaning assembly 5. The location where the roller surface contacts the electrode during rotation is the roller pressure point 3. The roller pressure point 3 refers to the location where the roller contacts the surface of the electrode when shaping and conveying the electrode. During the roller rotation, various points on the roller surface sequentially pass through the roller pressure point 3. The first cleaning assembly 4 and the second cleaning assembly 5 are spaced apart along the rotation direction of the roller and are used to clean the roller surface in a distributed manner.

[0027] The first cleaning assembly 4 includes a first scraper 41, which extends axially along the roller. The blade of the first scraper 41 contacts the roller surface. The first scraper 41 is tilted and oriented opposite the direction of the roller's rotation to enhance its cleaning effectiveness. As the roller rotates, the blade of the first scraper 41 remains in contact with the roller surface, utilizing the speed of the roller's rotation to remove foreign matter.

[0028] In this embodiment, the first cleaning assembly 4 also includes a clamping plate 42. The first scraper 41 is fixedly mounted on the clamping plate 42 with screws at both ends. When replacing the first scraper 41, the screws can be loosened to rotate the clamping plate 42, making it easy to remove the first scraper 41. The clamping plate 42 is also provided with an adjustable hole. The hole is a long, rectangular structure, and the screws are mounted in the hole. By changing the assembly position of the screws, the position and angle of the first scraper 41 can be adjusted, and the extension of the first scraper 41 from the clamping plate 42 can be adjusted. The extension is preferably 10-15 mm. The installation angle of the first scraper 41 can be adjusted within a range of 30-60 degrees.

[0029] The second cleaning assembly 5 includes a nozzle 51, a wiper 52, and a second scraper 53. In the direction of roller rotation, the nozzle 51, wiper 52, and second scraper 53 are spaced sequentially from the roller's pressure point 3. Specifically, the nozzle 51 is located on the side of the wiper 52 closest to the pressure point 3, and the second scraper 53 is located on the side of the wiper 52 farther from the pressure point 3. As the roller rotates, the roller surface passes from the pressure point 3 first through the nozzle 51, then through the wiper 52, and finally through the second scraper 53, cleaning the roller surface in sequence. The first scraper 41 and the second scraper 53 are oriented in the opposite direction of roller rotation, increasing the force applied by the first and second scrapers 41, 53 to remove foreign matter, thereby improving the cleaning effect.

[0030] The nozzle 51 is used to spray water toward the roller surface on the upper side of the wiping cloth 52. The wiping cloth 52 is in contact with the roller surface of the roller. The second scraper 53 is located at the bottom of the wiping cloth 52, and the blade of the second scraper 53 is in contact with the roller surface of the roller. The nozzle 51 is used to communicate with an external water storage tank. The water storage tank has a built-in peristaltic pump. The peristaltic pump controls the amount of water and supplies clean water to the nozzle 51. The nozzle 51 atomizes the water and evenly sprays it onto the roller surface of the roller, which can quickly dissolve the floating powder on the roller surface. In this embodiment, the water volume of the nozzle 51 can be controlled by the peristaltic pump in the external water storage tank. The atomized water spray volume of the nozzle 51 is 5-15mL / min.

[0031] The rag 52 is used to fit the roller surface of the roller. When the roller rotates, the rag 52 can wipe the wet roller surface and clean the floating powder and some water stains on the roller surface. In this embodiment, the rag 52 is specifically a non-woven fabric. Under the action of gravity, the water stains remaining on the roller surface will flow downward. A second scraper 53 is provided at the bottom of the rag 52. The second scraper 53 can remove the water stains remaining on the roller surface and foreign matter not wiped off by the rag 52, thereby preventing foreign matter or water stains from being incompletely recovered and being drawn into the roller along the roller's running trajectory and sticking to the roller again. This performs a third cleaning on the roller surface and improves the cleaning effect of the roller surface. Due to the good roller cleaning effect, the frequency of roller sticking is reduced during the rolling process, and the appearance of the electrode surface, such as decarburization and bumps, is significantly improved, which helps to improve the quality rate of the anode electrode.

[0032] The lengths of the first scraper 41, the wiping cloth 52, and the second scraper 53 are all shorter than the length of the roller, and are greater than the length of the wiping cloth 52. Length refers to the axial dimension of the first scraper 41, the wiping cloth 52, and the second scraper 53 along the roller. The lengths of the first scraper 41, the wiping cloth 52, and the second scraper 53 are all shorter than the length of the roller, and are greater than the length of the wiping cloth 52. This ensures that the first scraper 41 and the second scraper 53 clean the roller surface after being wiped by the wiping cloth 52, ensuring effective cleaning of the roller surface.

[0033] In this embodiment, taking a roller with a diameter of 800 mm and a length of 750 mm as an example, the length of the wiper 52 is 650 mm, and the width ranges from 620 to 700 mm. Furthermore, the cleaning force area of ​​the wiper 52 in close contact with the roller surface is approximately 13,000 mm², meaning that the width of the wiper 52 in contact with the roller is approximately 200 mm. The lengths of the first scraper 41 and the second scraper 53 are both 650 to 730 mm, with the optimal length of the first scraper 41 and the second scraper 53 being 740 mm.

[0034] In this embodiment, the rollers include an upper roller 1 and a lower roller 2, and the upper roller 1 and the lower roller 2 form a pair of rollers. The first cleaning assembly 4 and the second cleaning assembly 5 are each provided in two groups. The first cleaning assembly 4 and the second cleaning assembly 5 are arranged at intervals along the rotation direction of the upper roller 1, and the first cleaning assembly 4 and the second cleaning assembly 5 are arranged at intervals along the rotation direction of the lower roller 2.

[0035] After the upper roller 1 and lower roller 2 form a paired roller structure, they rotate in opposite directions. The side of the roller surfaces of the upper roller 1 and lower roller 2 that approaches each other is the inlet, and the side that moves away from each other is the outlet. The roller pressure point 3 is located between the inlet and outlet. Along the rotation direction of the upper roller 1, the first cleaning assembly 4 and the second cleaning assembly 5 are arranged in sequence, starting from the roller pressure point 3; along the rotation direction of the lower roller 2, the second cleaning assembly 5 and the first cleaning assembly 4 are arranged in sequence, starting from the roller pressure point 3. In other words, the arrangement order of the two cleaning assembly groups at the upper roller 1 and lower roller 2 is opposite. This ensures that the order of the nozzle 51, wiping cloth 52, and second scraper 53 of the second cleaning assembly 5 is correct, and that the second scraper 53 is positioned below the wiping cloth 52, allowing gravity to clean and collect water stains.

[0036] In the online roller cleaning device, when the roller rotates, the blade of the first scraper 41 of the first cleaning component 4 is always in contact with the roller surface of the roller to clean foreign matter on the roller surface; when the roller surface of the roller rotates from the roller pressure point 3 to the second cleaning component 5, the nozzle 51 of the second cleaning component 5 first sprays water to the roller surface on the upper side of the wiping cloth 52 to wet the roller surface of the roller, and then the wiping cloth 52 contacts the wetted roller surface and cleans the roller surface of the roller in real time, and then the blade of the second scraper 53 is always in contact with the roller surface cleaned by the wiping cloth 52, and the blade can not only scrape off the remaining foreign matter, but also clean the remaining water stains on the roller surface; the first scraper 41, the wiping cloth 52 and the second scraper 53 form a three-level cleaning structure, which cleans the roller surface three times in total, avoiding incomplete recovery of foreign matter or water stains, improving the foreign matter cleaning effect when the roller rotates at low speed, and improving the quality rate of the electrode.

[0037] Preferably, the second cleaning assembly 5 also includes a frame 54 and a support plate 55 mounted on the frame 54, the support plate 55 is arranged on the upper side of the horizontal center line of the roller, the wiping cloth 52 is fixedly mounted on the side of the support plate 55 close to the roller, and the second scraper 53 is fixedly mounted on the frame 54 and located at the bottom of the support plate 55.

[0038] A support plate 55 is mounted on the frame 54 of the second cleaning assembly 5. A wiping cloth 52 is fixedly mounted on the side of the support plate 55 near the roller. The support plate 55 provides support for the wiping cloth 52, ensuring contact between the wiping cloth 52 and the roller surface, while also facilitating replacement of the wiping cloth 52. The support plate 55 is positioned above the horizontal centerline of the roller. When the nozzle 51 located above the support plate 55 sprays mist onto the roller surface, the roller surface is nearly perpendicular to the direction of the mist's fall, effectively absorbing the mist and rapidly dissolving any powder floating on the roller surface. A second scraper 53, located at the bottom of the support plate 55, is positioned at the reverse slope of the roller surface, facilitating the removal of water stains and foreign matter.

[0039] Preferably, the plate surface of the support plate 55 close to the roller is a curved surface with a concave middle portion from top to bottom, and the wiping cloth 52 is fixedly assembled on the curved surface.

[0040] The plate surface of the support plate 55 is a concave curved surface, which can increase the contact area between the wiping cloth 52 and the roller surface of the roller, thereby improving the cleaning effect. In this embodiment, the curved surface is adapted to the roller surface of the wiping roller, and the length of the support plate 55 is 750mm and the width is 200mm.

[0041] Preferably, a first cylinder 56 is fixedly mounted on the frame 54, and the first cylinder 56 is transmission-connected to the support plate 55. The support plate 55 is slidingly mounted on the frame 54, and the first cylinder 56 extends and retracts in a direction perpendicular to the axis of the roller to push the support plate 55 away from or close to the roller.

[0042] The first cylinder 56 can extend and retract perpendicular to the roller axis. This movement drives the support plate 55 on the frame 54, adjusting the distance between the support plate 55 and the roller. When the first cylinder 56 pushes the support plate 55 and the wiper 52 attached to it into contact with the roller, the wiper 52 cleans the roller surface. When the first cylinder 56 retracts the support plate 55 and the wiper 52 attached to it, the wiper 52 on the support plate 55 can be replaced. In this embodiment, two sets of first cylinders 56 are connected to each end of the support plate 55, supporting and securing both ends and ensuring a consistent temperature at the support plate 55 when the wiper 52 contacts the roller surface.

[0043] Preferably, the second cleaning assembly 5 further comprises a moving module, the moving module is fixedly connected to the frame 54, and the moving module is transmission-connected to the nozzle 51 to drive the nozzle 51 to approach or move away from the roller.

[0044] The moving module can drive the nozzle 51 to move on the frame 54 and adjust the relative position of the nozzle 51 and the roller so that the water mist of the nozzle 51 can be evenly sprayed onto the roller surface of the roller during the water spraying process.

[0045] Preferably, the movable module includes a linear slide 57 and a pushing cylinder 58. The linear slide 57 is fixedly mounted on the frame 54. The linear slide 57 extends along the axial direction of the roller. The pushing cylinder 58 is guided and mounted on the slide. The extension and retraction direction of the pushing cylinder 58 is perpendicular to the extension direction of the linear slide 57. The nozzle 51 is fixedly mounted on the end of the pushing cylinder 58 away from the linear slide 57.

[0046] The linear slide 57 extends along the roller's axial direction. As the push cylinder 58 is guided along the linear slide 57, it drives the spray head 51 along the roller's axial direction. This synchronized movement of the spray head 51 along the roller's axial direction allows the water mist to be evenly applied to the roller's surface. In this embodiment, the push cylinder 58 moves along the linear slide 57 at a speed of 3-5 m / min. As the push cylinder 58 extends and retracts the spray head 51, the distance between the spray head 51 and the roller's surface can be adjusted to suit different operating conditions.

[0047] Preferably, the second cleaning assembly 5 further includes a cylindrical knife holder 59 , which is arranged parallel to the roller and spaced apart. The knife holder 59 is rotatably mounted on the frame 54 . The knife holder 59 has a knife groove 591 , and the second scraper 53 is mounted in the knife groove 591 .

[0048] The blade holder 59 is cylindrical in shape, and the second scraper 53 is screwed into the blade groove 591. In this embodiment, the frame 54 has bearing blocks, with both ends of the blade holder 59 mounted on the blocks. A spring is installed in the bearing blocks, which drives the blade holder 59 to rotate, changing the angle of the second scraper 53 so that the blade of the second scraper 53 is in close contact with the roller surface for cleaning. When the second scraper 53 needs to be replaced, the spring drives the blade holder 59 to rotate in the opposite direction, moving it away from the roller, allowing the operator to replace it. In this embodiment, there is always a gap between the blade holder 59 and the roller. During operation, if the second scraper 53 is damaged, the blade holder 59 will not damage the roller.

[0049] Preferably, the second cleaning assembly 5 further includes a water receiving box 6 , which is disposed at the bottom of the blade holder 59 and is communicated with the blade groove 591 .

[0050] A water collection box 6 is located at the bottom of the blade holder 59, and the blade slot 591 is connected to the water collection box 6. When the second scraper 53 removes water stains from the cleaning roller surface, the water flows through the second scraper 53 into the blade slot 591 and then out the bottom of the blade slot 591 into the water collection box 6, where the dirty water stains are recovered. The water stains on the roller surface are then cleaned again by the wiping cloth 52 and the second scraper 53, ensuring that all the wastewater is recovered. In this embodiment, a gap of 2-5 mm is provided at the bottom of the blade slot 591 for wastewater discharge, and the wastewater enters the water collection box 6 under the action of gravity.

[0051] Preferably, the first cleaning assembly 4 further includes a powder receiving groove 7 , which is disposed at the bottom of the first scraper 41 .

[0052] The powder collecting box is installed at the bottom of the first scraper 41. After the first scraper 41 scrapes off foreign matter on the roller surface, the powdery foreign matter falls into the powder collecting box under the action of gravity, and the cleaned foreign matter is collected.

[0053] Preferably, the distance between the first scraper 41 and the second scraper 53 along the circumferential direction of the roller is greater than two-fifths of the circumference of the roller.

[0054] In this embodiment, the first cleaning component 4 and the second cleaning component 5 are arranged at intervals along the circumference of the roller, and the distance between the first scraper 41 and the second scraper 53 along the circumference of the roller is greater than two-fifths of the circumference of the roller. The distance between the first scraper 41 and the second scraper 53 can be increased, so that inertial cleaning is achieved between the first scraper 41 and the second scraper 53, thereby improving the cleaning effect.

[0055] In summary, the embodiment of the present invention provides an online roller cleaning device, in which the blade of the first scraper of the first cleaning component is always in contact with the roller surface of the roller when the roller rotates, and foreign matter on the roller surface is cleaned; when the roller surface of the roller rotates from the roller pressure point to the second cleaning component, the nozzle of the second cleaning component first sprays water to the roller surface on the upper side of the wiping cloth to wet the roller surface of the roller, and then the wiping cloth contacts the moistened roller surface and cleans the roller surface of the roller in real time, and then the blade of the second scraper is always in contact with the roller surface cleaned by the wiping cloth, and the blade can not only scrape off the remaining foreign matter, but also clean the remaining water stains on the roller surface; the first scraper, the wiping cloth and the second scraper form a three-level cleaning structure, which cleans the roller surface three times in total, avoiding incomplete recovery of foreign matter or water stains, improving the foreign matter cleaning effect of the roller when the roller rotates at low speed, and improving the quality rate of the electrode.

[0056] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and replacements can be made without departing from the technical principles of the present invention. These improvements and replacements should also be regarded as the scope of protection of the present invention.

Claims

1. An online roller cleaning device, characterized in that: include: Roller, the position where the roller surface contacts the pole piece during the roller rotation is defined as the roller pressure point (3); A first cleaning assembly (4), the first cleaning assembly (4) comprising a first scraper (41), the blade of the first scraper (41) being in contact with the roller surface of the roller; The second cleaning component (5) comprises a nozzle (51), a wiping cloth (52) and a second scraper (53). In the rotation direction of the roller, the nozzle (51) is located on the side of the wiping cloth (52) close to the roller pressure point (3), and the second scraper (53) is located on the side of the wiping cloth (52) away from the roller pressure point (3). The nozzle (51) is used to spray water toward the roller surface on the upper side of the wiping cloth (52). The wiping cloth (52) contacts the roller surface of the roller. The second scraper (53) is located at the bottom of the wiping cloth (52). The blade of the second scraper (53) contacts the roller surface of the roller.

2. The online roller cleaning device according to claim 1, characterized in that: The second cleaning assembly (5) further comprises a frame (54) and a support plate (55) mounted on the frame (54), wherein the support plate (55) is arranged on the upper side of the horizontal center line of the roller, the wiping cloth (52) is fixedly mounted on a side of the support plate (55) close to the roller, and the second scraper (53) is fixedly mounted on the frame (54) and located at the bottom of the support plate (55).

3. The online roller cleaning device according to claim 2, characterized in that: The plate surface of the support plate (55) close to the roller is a curved surface with a concave middle portion from top to bottom, and the wiping cloth (52) is fixedly assembled on the curved surface.

4. The online roller cleaning device according to claim 2, characterized in that: The frame (54) is also fixedly equipped with a first cylinder (56), which is in transmission connection with the backing plate (55). The backing plate (55) is slidably assembled on the frame (54). The first cylinder (56) is extended and retracted in a direction perpendicular to the axial direction of the roller to push the backing plate (55) away from or close to the roller.

5. The online roller cleaning device according to claim 2, characterized in that: The second cleaning assembly (5) further comprises a movable module, wherein the movable module is fixedly connected to the frame (54), and the movable module is transmission-connected to the nozzle (51) to drive the nozzle (51) toward or away from the roller.

6. The online roller cleaning device according to claim 5, characterized in that: The movable module includes a linear slide (57) and a pushing cylinder (58), wherein the linear slide (57) is fixedly mounted on the frame (54), the linear slide (57) extends along the axial direction of the roller, the pushing cylinder (58) is guided and mounted on the slide, the telescopic direction of the pushing cylinder (58) is perpendicular to the extension direction of the linear slide (57), and the nozzle (51) is fixedly mounted on one end of the pushing cylinder (58) away from the linear slide (57).

7. The online roller cleaning device according to claim 2, characterized in that: The second cleaning assembly (5) further includes a cylindrical knife holder (59), which is arranged in parallel and spaced relation with the roller, and is rotatably mounted on the frame (54). The knife holder (59) has a knife groove (591), and the second scraper (53) is mounted in the knife groove (591).

8. The online roller cleaning device according to claim 7, characterized in that: The second cleaning assembly (5) further comprises a water receiving box (6), wherein the water receiving box (6) is arranged at the bottom of the blade holder (59), and the water receiving box (6) is in communication with the blade groove (591).

9. The online roller cleaning device according to any one of claims 1 to 8, characterized in that: The first cleaning component (4) further comprises a powder receiving groove (7), and the powder receiving groove (7) is arranged at the bottom of the first scraper (41).

10. The online roller cleaning device according to any one of claims 1 to 8, characterized in that: The distance between the first scraper (41) and the second scraper (53) along the circumference of the roller is greater than two-fifths of the circumference of the roller.

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