Composite sheet cleaning roller and cleaning device

Abstract

The embodiment of the utility model provides a clad sheet cleaning roller and cleaning device, relates to battery preparation technical field, the clad sheet cleaning roller comprises a roller passing shaft, a clad sheet passing roller and a dust collection pipe, one end of the roller passing shaft is used for being arranged on an external machine base, the clad sheet passing roller is rotatably sleeved outside the roller passing shaft and can bypass the roller shaft to rotate, and the dust collection pipe is used for collecting dust from the clad sheet passing roller. A plurality of dust collection holes are formed in the circumferential surface of the clad sheet passing roller, a conduction cavity communicated with the dust collection holes is formed in the clad sheet passing roller, the passing roller shaft is further provided with a negative pressure cavity, the negative pressure cavity is communicated with the conduction cavity, and the dust collection pipe is arranged at the other end of the passing roller shaft, communicated with the negative pressure cavity and used for pumping out gas in the negative pressure cavity. Compared with the prior art, the dust collection channel is formed by the dust collection hole, the conduction cavity, the negative pressure cavity and the dust collection pipe, so that dust on the peripheral surface of the clad sheet can be effectively collected, the quality of a battery cell is ensured, and normal conveying of the clad sheet can be ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery preparation technical field, specifically, relate to a kind of composite sheet cleaning roller and cleaning device. BACKGROUND

[0002] In the process of laminated battery, positive and negative pole piece needs to be combined with diaphragm to form continuous composite pole piece after cutting, the edge of positive pole piece will rub with the surface of roller and produce powder, and these dusts will cause diaphragm damage after stacking on stacking table, thereby causing short circuit of battery cell.

[0003] Further, the forming method of the laminated battery cell and the wound battery cell is different, the positive and negative pole pieces need to be hot-combined with the diaphragm after cutting by the cutter, and the composite material belt needs to be transmitted on the stacking table for stacking and forming after hot-combining, the conventional composite roller is composed of a shaft and a roller, after the pole pieces and the diaphragm are hot-combined, the composite pole pieces are easily rubbed with the roller during transmission, and the dusts on the composite pole pieces will pierce the diaphragm during laminating, thereby causing short circuit of the battery cell. SUMMARY

[0004] The utility model aims at providing a kind of composite sheet cleaning roller and cleaning device, which can effectively suck the dust on the surface of composite sheet, ensure the quality of battery cell, and ensure the normal conveying of composite sheet.

[0005] The embodiment of the utility model is realized as follows:

[0006] In the first aspect, the utility model provides a kind of composite sheet cleaning roller, including roller shaft, composite sheet roller and dust absorption pipe, one end of the roller shaft is used to be set on external machine base, the composite sheet roller is rotatably sleeved on the outside of the roller shaft, and can rotate around the roller shaft, the surface of the composite sheet roller is provided with a plurality of dust absorption holes, and the composite sheet roller is provided with through cavity that communicates with the dust absorption hole, the roller shaft is further provided with negative pressure cavity, the negative pressure cavity communicates with the through cavity, the dust absorption pipe is arranged at the other end of the roller shaft, and communicates with the negative pressure cavity, for extracting gas in the negative pressure cavity.

[0007] In optional implementation, the dust absorption holes are arrayed on the surface of the composite sheet roller, and the plurality of dust absorption holes are communicated with the through cavity, for sucking the dust on the surface of composite sheet into the through cavity.

[0008] In optional implementation, the dust absorption hole is in the form of round hole or conical hole.

[0009] In an optional embodiment, the circumferential surface of the over roller shaft is provided with a plurality of through holes, and the negative pressure cavity is arranged in the over roller shaft, and at least part of the through holes are in communication with the negative pressure cavity and the through cavity.

[0010] In an optional embodiment, the through cavity comprises a ring cavity and at least one sector cavity, the ring cavity is annularly arranged at the peripheral region of the over roller, the big end of the sector cavity is in communication with the ring cavity, and the small end of the sector cavity extends towards the central region of the over roller and is in communication with the through hole.

[0011] In an optional embodiment, the over roller shaft is provided with a negative pressure shell, the outer diameter of the negative pressure shell is the same as the outer diameter of the over roller, the negative pressure shell is arranged on the side of the over roller away from the external machine base, and the negative pressure cavity is arranged in the negative pressure shell, and the dust suction pipe is arranged at the end of the negative pressure shell away from the over roller.

[0012] In an optional embodiment, the negative pressure shell is provided with a vacuum ring at the end close to the over roller, the vacuum ring is connected to the end surface of the over roller, the inner side of the vacuum ring is provided with an arc-shaped groove, and the arc-shaped groove is in communication with the through cavity and the negative pressure cavity.

[0013] In an optional embodiment, the arc-shaped groove can be a plurality of arc-shaped grooves, the plurality of arc-shaped grooves are uniformly distributed on the vacuum ring, and each arc-shaped groove is in communication with the through cavity and the negative pressure cavity.

[0014] In an optional embodiment, the edge of the vacuum ring is provided with a flexible sealing ring, and the flexible sealing ring is used for sealing the gap between the vacuum ring and the over roller.

[0015] In a second aspect, the utility model provides a kind of cleaning device, including external machine base, negative pressure generator and the composite sheet cleaning roller as described in any one of the preceding embodiments, two composite sheet cleaning rollers are oppositely arranged on the external machine base, and the negative pressure generator is arranged on the external machine base and is connected with the dust suction pipe.

[0016] The beneficial effects of the embodiments of the utility model include:

[0017] The composite sheet cleaning roller and the cleaning device provided by the utility model, one end of the passing roller shaft is arranged on the external frame, the composite sheet passing roller is rotatably sleeved outside the passing roller shaft and can rotate around the passing roller shaft, the peripheral surface of the composite sheet passing roller is provided with a plurality of dust suction holes, the composite sheet passing roller is internally provided with a through cavity which is communicated with the dust suction holes, the passing roller shaft is further provided with a negative pressure cavity, the negative pressure cavity is communicated with the through cavity, the dust suction pipe is arranged at the end of the passing roller shaft which is away from the external frame and is communicated with the negative pressure cavity, and the gas in the negative pressure cavity can be sucked out.In actual use, the two composite sheet cleaning rollers can be clamped on the two sides of the composite sheet, the peripheral surface of the composite sheet is in contact with the surface of the composite sheet, the dust on the surface of the composite sheet can be sucked into the through cavity through the plurality of dust suction holes, then sucked into the negative pressure cavity through the through cavity, and finally sucked away through the dust suction pipe.Compared with the prior art, the utility model forms a dust suction channel through the dust suction hole, the through cavity, the negative pressure cavity and the dust suction pipe, can effectively suck the dust on the peripheral surface of the composite sheet, ensures the quality of the battery cell and can ensure the normal conveying of the composite sheet. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiments, and it should be understood that the following drawings only show some embodiments of the utility model, and therefore should not be regarded as a limitation to the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0019] Figure 1 The overall structure schematic view of the composite sheet cleaning roller provided by the first embodiment of the utility model;

[0020] Figure 2 The cross-sectional structure schematic view of the composite sheet cleaning roller provided by the first embodiment of the utility model;

[0021] Figure 3 The overall structure schematic view of the composite sheet cleaning roller provided by the second embodiment of the utility model;

[0022] Figure 4 The cross-sectional structure schematic view of the composite sheet cleaning roller provided by the second embodiment of the utility model; Figure 3

[0023] Figure 5 The exploded structure schematic view of the composite sheet cleaning roller provided by the second embodiment of the utility model;

[0024] Figure 6 The schematic view of another composite sheet cleaning roller provided by the second embodiment of the utility model.

[0025] FIG.

[0026] ​100 - composite sheet cleaning roller; 110 - roller shaft; 111 - negative pressure cavity; 113 - through hole; 130 - composite sheet roller; 131 - dust suction hole; 133 - through cavity; 135 - annular cavity; 137 - sector cavity; 150 - dust suction pipe; 170 - negative pressure shell; 171 - vacuum ring; 173 - arc-shaped groove; 175 - flexible sealing ring. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative labor are within the scope of protection of the present application.

[0029] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0030] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly placed when the product of the present application is used, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" and the like are only used for differentiation in description, and cannot be understood as indicating or implying relative importance.

[0031] In addition, the terms "horizontal", "vertical" and the like do not mean that the components must be absolutely horizontal or vertical, but can be slightly inclined. For example, "horizontal" only means that its direction is relatively more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0032] In the description of the utility model, still need to explain, unless another explicit provision and limitation, term "arrange", "install", "connect", "connect" should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through intermediate medium, can be two elements inside the communication.For ordinary skilled in the art, the above-mentioned terms can be understood according to the specific meaning of the utility model.

[0033] First embodiment

[0034] Please refer to Figure 1 And Figure 2 The utility model discloses a kind of composite sheet cleaning roller 100, which can effectively suck the dust on the surface of composite sheet, ensure the quality of battery cell, and can ensure the normal conveying of composite sheet.

[0035] The composite sheet cleaning roller 100 provided in the embodiment includes a roller shaft 110, a composite sheet roller 130, and a dust suction pipe 150. One end of the roller shaft 110 is arranged on an external machine base. The composite sheet roller 130 is rotatably sleeved on the outside of the roller shaft 110 and can rotate around the roller shaft 110. The surface of the composite sheet roller 130 is provided with a plurality of dust suction holes 131, and the composite sheet roller 130 is provided with a communication cavity 133 that communicates with the dust suction holes 131. The roller shaft 110 is further provided with a negative pressure cavity 111 that communicates with the communication cavity 133. The dust suction pipe 150 is arranged at the other end of the roller shaft 110 and communicates with the negative pressure cavity 111, and is used to extract the gas in the negative pressure cavity 111.

[0036] In the embodiment, during actual use, the two composite sheet cleaning rollers 100 can be clamped on the two sides of the composite sheet. The surface of the composite sheet is in contact with the surface of the composite sheet. The dust on the surface of the composite sheet can be sucked into the communication cavity 133 through the plurality of dust suction holes 131, then sucked into the negative pressure cavity 111 through the communication cavity 133, and finally sucked away by the dust suction pipe 150. The dust suction holes 131, the communication cavity 133, the negative pressure cavity 111, and the dust suction pipe 150 form a dust suction channel, which can effectively suck the dust on the surface of the composite sheet, ensure the quality of battery cell, and ensure the normal conveying of the composite sheet.

[0037] In the embodiment, the dust suction holes 131 are arrayed on the surface of the composite sheet roller 130. The plurality of dust suction holes 131 communicate with the communication cavity 133 and are used to suck the dust on the surface of the composite sheet into the communication cavity 133. Specifically, the dust suction holes 131 can be microporous structures and communicate with the negative pressure cavity 111 through the internal communication cavity 133. The arrayed dust suction holes 131 can ensure the dust suction range and avoid residual dust on the composite sheet.

[0038] Further, the dust suction hole 131 is in the shape of a circular hole or a tapered hole, preferably, the dust suction hole 131 can be a circular hole, that is, the inlet end and the outlet end of the dust suction hole 131 are both circular holes with the same size. Of course, in other preferred embodiments, the dust suction hole 131 can also be in the shape of a tapered hole, that is, the size of the inlet end of the dust suction hole 131 is greater than the size of the outlet end, so that the cross section of the dust suction hole 131 is in the shape of a truncated cone.

[0039] In the present embodiment, the circumferential surface of the over roller shaft 110 is provided with a plurality of through holes 113, and the negative pressure cavity 111 is arranged in the over roller shaft 110, and at least part of the through holes 113 simultaneously communicate with the negative pressure cavity 111 and the through cavity 133. Specifically, the over roller shaft 110 is also partially hollow, and the negative pressure cavity 111 is formed in the inside of the over roller shaft 110, which communicates with the dust suction pipe 150 outside, and the over roller shaft 110 adopts a plurality of through holes 113 in the shape of a circular hole like the composite sheet over roller 130, and the gas in the through cavity 133 can be sucked into the negative pressure cavity 111 through the through holes 113, completing the adsorption and transmission of dust.

[0040] It is worth noting that the plurality of through holes 113 here can also adopt an array structure, so as to ensure the communication between the negative pressure cavity 111 and the through cavity 133 at all times, and ensure the pressure balance.

[0041] In the present embodiment, the through cavity 133 includes an annular cavity 135 and at least one sector cavity 137, the annular cavity 135 is annularly arranged around the peripheral region of the composite sheet over roller 130, the big end of the sector cavity 137 communicates with the annular cavity 135, and the small end of the sector cavity 137 extends towards the central region of the composite sheet over roller 130 and communicates with the through hole 113. Specifically, the annular cavity 135 is distributed in the shape of a cylinder around the peripheral region of the composite sheet over roller 130, and the sector cavity 137 can play an intermediate transition role, and can suck the gas and dust in the annular cavity 135 and the dust suction hole 131 into the through hole 113 and the negative pressure cavity 111 from the sector cavity 137.

[0042] It should be noted that the width of the annular cavity 135 along the axial direction is less than the width of the composite sheet over roller 130 along the axial direction, and the width of the annular cavity 135 along the axial direction is the same as the distribution width of the dust suction hole 131. Moreover, in order to ensure that the composite sheet over roller 130 can smoothly rotate around the roller shaft 110, the width of the sector cavity 137 along the axial direction can be less than the width of the annular cavity 135 along the axial direction. At the same time, the structure of the sector cavity 137 is not unique, and can be divided into a single sector cavity 137 and a plurality of sector cavities 137, and when a plurality of sector cavities 137 are adopted, the plurality of sector cavities 137 can be separated from each other.

[0043] In summary, the utility model discloses an embodiment provides a kind of composite sheet cleaning roller 100, the one end of over roller shaft 110 is arranged on external machine base, and composite sheet over roller 130 is rotatably sleeved in over roller shaft 110 outside, and can rotate around over roller shaft 110, the periphery of composite sheet over roller 130 is provided with multiple dust suction holes 131, and composite sheet over roller 130 is provided with the through cavity 133 that is communicated with dust suction hole 131 in, and over roller shaft 110 is also provided with negative pressure cavity 111, and negative pressure cavity 111 is communicated with through cavity 133, dust suction pipe 150 is arranged in the one end of over roller shaft 110 away from external machine base, and is communicated with negative pressure cavity 111, can extract the gas in negative pressure cavity 111.In actual use, two composite sheet cleaning roller 100 can be clamped on the two sides of composite sheet, the periphery of composite sheet is contacted with the surface of composite sheet, and the dust on the surface of composite sheet can be sucked into through cavity 133 by multiple dust suction holes 131, then is sucked into negative pressure cavity 111 by through cavity 133, and finally is sucked away by dust suction pipe 150.Compared with prior art, the utility model is formed dust suction channel by dust suction hole 131, through cavity 133, negative pressure cavity 111 and dust suction pipe 150, can effectively suck the dust on the periphery of composite sheet, guarantee the quality of battery cell, and can guarantee the normal conveying of composite sheet.

[0044] Second embodiment

[0045] Reference Figures 3 to 5 The embodiment provides a kind of composite sheet cleaning roller 100, its basic structure and principle and the technical effect generated are identical with the first embodiment, for brief description, part of the embodiment not mentioned, can refer to the corresponding content in the first embodiment.

[0046] In the embodiment, composite sheet cleaning roller 100 includes over roller shaft 110, composite sheet over roller 130 and dust suction pipe 150, the one end of over roller shaft 110 is used to be arranged on external machine base, composite sheet over roller 130 is rotatably sleeved in over roller shaft 110 outside, and can rotate around over roller shaft 110, the periphery of composite sheet over roller 130 is provided with multiple dust suction holes 131, and composite sheet over roller 130 is provided with the through cavity 133 that is communicated with dust suction hole 131 in, over roller shaft 110 is also provided with negative pressure cavity 111, and negative pressure cavity 111 is communicated with through cavity 133, dust suction pipe 150 is arranged in the other end of over roller shaft 110, and is communicated with negative pressure cavity 111, for extracting the gas in negative pressure cavity 111.

[0047] In the embodiment, the negative pressure shell 170 is arranged on the roller shaft 110, the outer diameter of the negative pressure shell 170 is the same as that of the composite sheet roller 130, the negative pressure shell 170 is arranged on the side of the composite sheet roller 130 away from the external machine base, and the negative pressure cavity 111 is arranged inside the negative pressure shell 170, and the dust suction pipe 150 is arranged at the end of the negative pressure shell 170 away from the composite sheet roller 130. Specifically, the negative pressure shell 170 is in a cylindrical shape and is integrally arranged at the end of the roller shaft 110 away from the external machine base, and in actual use, the negative pressure shell 170 does not rotate with the roller shaft 110, and only the composite sheet roller 130 rotates.

[0048] In the embodiment, the negative pressure shell 170 is arranged on the roller shaft 110, the outer diameter of the negative pressure shell 170 is the same as that of the composite sheet roller 130, the negative pressure shell 170 is arranged on the side of the composite sheet roller 130 away from the external machine base, and the negative pressure cavity 111 is arranged inside the negative pressure shell 170, and the dust suction pipe 150 is arranged at the end of the negative pressure shell 170 away from the composite sheet roller 130. Specifically, the negative pressure shell 170 is in a cylindrical shape and is integrally arranged at the end of the roller shaft 110 away from the external machine base, and in actual use, the negative pressure shell 170 does not rotate with the roller shaft 110, and only the composite sheet roller 130 rotates.

[0049] Referring to Figure 6 In other preferable embodiments of the utility model, the arc-shaped grooves 173 can be multiple, the multiple arc-shaped grooves 173 are evenly distributed on the vacuum ring 171, and each arc-shaped groove 173 simultaneously communicates the through cavity 133 and the negative pressure cavity 111, and by arranging multiple arc-shaped grooves 173, the through cavity 133 in the composite sheet roller 130 can be communicated with at least one arc-shaped groove 173, and the communication effect is ensured.

[0050] Please continue to refer to Figures 3 to 5 In the embodiment, the through cavity 133 is multiple, and the multiple through cavities 133 are all axial passage holes, each axial passage hole is communicated with multiple dust suction holes 131 on the same straight line and extends to the end of the composite sheet guide roller to realize corresponding communication with the arc-shaped groove 173. The axial passage hole can be a round hole structure or a waist-shaped hole structure.

[0051] It should be noted that the dust suction hole 131 is in communication with the axial channel, the axial channel is in communication with the arc-shaped groove 173 of the vacuum ring 171, the arc-shaped groove 173 is in communication with the negative pressure cavity 111, and the negative pressure cavity 111 is in communication with the dust suction pipe 150. When the composite sheet is transmitted on the surface of the composite sheet passing roller 130, the composite sheet passing roller 130 rotates, and the vacuum ring 171 and the negative pressure shell 170 remain stationary, so that the dust can only enter the negative pressure cavity 111 through the arc-shaped groove 173 on the vacuum ring 171, thereby realizing the local directional dust removal of the composite sheet. The arc-shaped groove 173 is arranged at a position close to the load-bearing side of the composite sheet passing roller 130, that is, as shown in the figure, the included angle of the arc-shaped groove 173 can be adjusted according to the wrap angle of the composite sheet.

[0052] Further, in order to avoid air leakage as much as possible, the edge of the vacuum ring 171 is provided with a flexible sealing ring 175, which is used to block the gap between the vacuum ring 171 and the composite sheet passing roller 130. The flexible sealing ring 175 can be friction-welded to the surface of the composite sheet passing roller 130, thereby shielding the gap between the vacuum ring 171 and the composite sheet passing roller 130 and reducing air leakage.

[0053] Third embodiment

[0054] The present embodiment provides a cleaning device, comprising an external machine base, a negative pressure generator and the aforementioned composite sheet cleaning roller 100, wherein the basic structure and principle of the composite sheet cleaning roller 100 and the technical effects generated are the same as those of the first embodiment or the second embodiment. For brief description, the part not mentioned in the present embodiment can refer to the corresponding content in the first embodiment or the second embodiment.

[0055] In the present embodiment, the cleaning device comprises an external machine base, a negative pressure generator and the aforementioned composite sheet cleaning roller 100, two composite sheet cleaning rollers 100 are oppositely arranged on the external machine base. Specifically, the composite sheet cleaning roller 100 comprises a passing roller shaft 110, a composite sheet passing roller 130 and a dust suction pipe 150. One end of the passing roller shaft 110 is arranged on the external machine base. The composite sheet passing roller 130 is rotatably sleeved outside the passing roller shaft 110 and can rotate around the passing roller shaft 110. The peripheral surface of the composite sheet passing roller 130 is provided with a plurality of dust suction holes 131, and the composite sheet passing roller 130 is provided with a through cavity 133 in communication with the dust suction holes 131. The passing roller shaft 110 is further provided with a negative pressure cavity 111 in communication with the through cavity 133. The dust suction pipe 150 is arranged at the other end of the passing roller shaft 110 and is in communication with the negative pressure cavity 111, and is used to extract the gas in the negative pressure cavity 111. The negative pressure generator is arranged on the external machine base and connected with the dust suction pipe.

[0056] The above merely describes preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A composite sheet cleaning roll characterized by, The over roller shaft has one end arranged on the external machine base, the over roller is rotatably sleeved on the over roller shaft and can rotate around the over roller shaft, the over roller has a plurality of dust suction holes on the peripheral surface, and the over roller has a through cavity in communication with the dust suction holes, the over roller shaft further has a negative pressure cavity in communication with the through cavity, and the dust suction pipe is arranged at the other end of the over roller shaft and is in communication with the negative pressure cavity to extract the gas in the negative pressure cavity.

2. The composite sheet cleaning roller of claim 1, wherein, The dust suction holes are arranged on the peripheral surface of the over roller, and the plurality of dust suction holes are in communication with the through cavity to suck the dust on the peripheral surface of the over roller into the through cavity.

3. The composite sheet cleaning roller of claim 2, wherein, The dust suction holes are in the shape of a circular hole or a conical hole.

4. The composite sheet cleaning roller of claim 2, wherein, The peripheral surface of the over roller shaft is provided with a plurality of through holes, the negative pressure cavity is arranged in the over roller shaft, and at least part of the through holes are in communication with the negative pressure cavity and the through cavity.

5. The composite sheet cleaning roller of claim 4, wherein, The through cavity includes an annular cavity and at least one sector cavity, the annular cavity is annularly arranged around the peripheral region of the over roller, the large end of the sector cavity is in communication with the annular cavity, and the small end of the sector cavity extends towards the central region of the over roller and is in communication with the through hole.

6. The composite sheet cleaning roller of claim 2, wherein, The over roller shaft is provided with a negative pressure shell, the outer diameter of the negative pressure shell is the same as the outer diameter of the over roller, the negative pressure shell is arranged on the side of the over roller away from the external machine base, and the negative pressure cavity is arranged in the negative pressure shell, and the dust suction pipe is arranged at the end of the negative pressure shell away from the over roller.

7. The composite sheet cleaning roller of claim 6, wherein, The end of the negative pressure shell close to the over roller is provided with a vacuum ring, the vacuum ring is connected to the end surface of the over roller, the inner side of the vacuum ring is provided with an arc-shaped groove, and the arc-shaped groove is in communication with the through cavity and the negative pressure cavity.

8. The composite sheet cleaning roller of claim 7, wherein, The arc-shaped groove can be a plurality of arc-shaped grooves, the plurality of arc-shaped grooves are uniformly distributed on the vacuum ring, and each arc-shaped groove is in communication with the through cavity and the negative pressure cavity.

9. The composite sheet cleaning roller of claim 7, wherein, The edge of the vacuum ring is provided with a flexible sealing ring, and the flexible sealing ring is used to block the gap between the vacuum ring and the over roller.

10. A cleaning device characterized by The external machine base, the negative pressure generator and two over rollers are arranged on the external machine base, the negative pressure generator is arranged on the external machine base and connected with the dust suction pipes of the two over rollers.

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