Roller passing device and drying equipment

Abstract

The embodiment of the utility model provides a roller passing device and drying equipment, the roller passing device comprises a roller body and a supporting piece, the roller body is provided with blank areas and coating areas which are alternately distributed in the axial direction of the roller body, the number of the coating areas is at least two, and the blank area located between every two adjacent coating areas is a first blank area. The supporting piece is of an annular structure, the periphery of the roller body is sleeved with the supporting piece, the supporting piece and the roller body rotate synchronously, and the first blank space area is provided with the supporting piece. The forming quality of the pole piece is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery manufacturing equipment, and more particularly, to an over roller device and a drying equipment. BACKGROUND

[0002] In the production process of a battery, slurry is coated on the surface of a substrate, and then baking is performed to form a pole piece. During the baking process, the position of the substrate where the slurry is not coated is prone to warping and deformation due to its lighter weight, which in turn causes the pole piece to be prone to cracking. CONTENT OF THE UTILITY MODEL

[0003] In view of the above problems, the present application provides an over roller device and a drying equipment, which are beneficial to improve the forming quality of the pole piece.

[0004] In a first aspect, the present application provides an over roller device, comprising: a roller body having alternating blank areas and coating areas along the axial direction thereof, the number of coating areas being at least two, and the blank area between two adjacent coating areas being a first blank area; and a support member in a ring structure, the support member being sleeved on the outer periphery of the roller body and rotating synchronously with the roller body, and the first blank area being provided with the support member.

[0005] In some embodiments of the first aspect, by providing the support member in the first blank area, the support member can support the area of the film where the slurry is not coated during the transmission of the film through the roller body, so as to prevent the area of the film corresponding to the support member from warping and cracking due to the lighter weight caused by the absence of slurry during the drying process, thereby improving the forming quality of the pole piece.

[0006] In some embodiments, the support member is coaxially arranged with the roller body. By this arrangement, the support member can better support the area of the film where the slurry is not coated.

[0007] In some embodiments, the number of first blank areas is at least two. This design allows the over roller device to support the transmission of a film that can be cut into multiple pole pieces, thereby saving costs.

[0008] In some embodiments, the support member is detachably connected to the roller body. By this arrangement, the support member can be easily maintained and replaced.

[0009] In some embodiments, the support member is movably connected to the roller body in the axial direction. By this arrangement, the support member can be adjusted in position according to the different positions of the first blank area, thereby improving the versatility of the over roller device.

[0010] In some embodiments, the over-roller device further comprises a moving piece, the moving piece is arranged on the roller body, and the support piece is movably connected to the roller body through the moving piece. In this way, the effectiveness of the movement of the support piece relative to the roller body is ensured.

[0011] In some embodiments, the support piece has an inner annular surface and an outer annular surface, the inner annular surface faces the roller body, and the outer annular surface faces away from the roller body, and the inner annular surface is arranged in abutment with the outer circumferential surface of the roller body. Such a design makes the connection between the support piece and the roller body more compact, thereby reducing the space occupation.

[0012] In some embodiments, the inner annular surface has opposite first and second ends in the axial direction, the outer annular surface has opposite third and fourth ends in the axial direction, the first end is connected to the third end, and the second end is connected to the fourth end, and from the third end to the fourth end, the spacing between the outer annular surface and the outer circumferential surface of the roller body in the radial direction of the roller body increases first and then decreases. In this way, the shape of the outer annular surface of the support piece can be adapted to the shape of the film after it is raised, so that the support piece can better support the area of the film that is not coated with the paste.

[0013] In some embodiments, the cross section of the outer annular surface in the circumferential direction of the support piece is arc-shaped. Such a design can further improve the matching degree of the outer annular surface of the support piece and the shape of the film after it is raised.

[0014] In some embodiments, the maximum spacing between the outer annular surface and the outer circumferential surface of the roller body in the radial direction is between 3mm and 7mm. In this way, the support effect of the support piece on the area of the film that is not coated with the paste can be further improved.

[0015] In some embodiments, the number of blank areas is multiple, the blank areas located on both sides of the roller body in the axial direction are second blank areas, and the second blank areas are provided with the support piece. Such a design can also occur in the case where the area of the film on both sides that is not coated with the paste is raised, which is beneficial to improve the use flexibility.

[0016] In a second aspect, the present application provides a drying device, comprising: an oven; and the over-roller device according to any one of the embodiments of the first aspect, the over-roller device being arranged inside the oven.

[0017] In some embodiments, the oven is provided with a first air outlet on one side in a first direction and a second air outlet on the other side; in the first direction, the height position of the first air outlet is higher than that of the second air outlet, the over-roller device is located between the first air outlet and the second air outlet, and the minimum distance between the over-roller device and the first air outlet is greater than the minimum distance between the over-roller device and the second air outlet.

[0018] The above description is only a summary of the technical solutions of the present application. In order to make the technical means of the present application more clearly understood and implemented according to the content of the description, and in order to make the above and other purposes, characteristics and advantages of the present application more obvious and easy to understand, the following specific embodiments of the present application will be described. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments of the present application. Obviously, the drawings described below are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of the drawings.

[0020] Figure 1 The structure schematic diagram of the roller device provided for some embodiments of the present application is shown in the figure.

[0021] Figure 2 The cross-sectional view of the roller device provided for some embodiments of the present application is shown in the figure.

[0022] Figure 3 The enlarged view of P in figure 2 is shown in the figure.

[0023] Figure 4 The structure schematic diagram of the roller device provided for some embodiments of the present application is shown in the figure.

[0024] Figure 5 The side view of the drying equipment provided for some embodiments of the present application is shown in the figure.

[0025] The specific embodiments are as follows:

[0026] 100, roller device;

[0027] 10, roller body; 101, outer peripheral surface; 11, blank area; 111, first blank area; 112, second blank area; 12, paint area;

[0028] 20, support; 21, inner annular surface; 211, first end; 212, second end; 22, outer annular surface; 221, third end; 222, fourth end;

[0029] 200, drying oven; 210, first air outlet; 220, second air outlet;

[0030] X, axial direction; Y, radial direction; Z, circumferential direction; A, first direction. Specific embodiments

[0031] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0032] Unless otherwise defined, all technical and scientific terms used in the present application have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs; the terms used in the present application are only for the purpose of describing the specific embodiments of the present application and are not intended to limit the present application; the terms "include" and "have" and any variations thereof in the specification and claims of the present application and the above description of drawings are intended to cover non-exclusive inclusion. The terms "first", "second" and the like in the specification and claims of the present application or the above description of drawings are used to distinguish different objects, and are not intended to describe a particular order or primary and secondary relationship.

[0033] In the present application, the term "embodiment" means that the specific features, structures or properties described in connection with the embodiment can be included in at least one embodiment of the present application. The phrase appears at various places in the specification does not necessarily refer to the same embodiment, nor is it mutually exclusive or alternative to other embodiments.

[0034] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mount", "connect", "connection", "attach" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be direct connection, or indirect connection through intermediate medium, or internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0035] In the present application, the term "and / or" is only a description of the association relationship between the associated objects, which means that there can be three kinds of relationships, for example, A and / or B can mean that A exists alone, A and B exist together, and B exists alone. In addition, the character " / " in the present application generally represents an "or" relationship between the front and rear associated objects.

[0036] In the embodiments of the present application, the same reference signs represent the same parts, and for the sake of brevity, the detailed description of the same parts is omitted in different embodiments. It should be understood that the thickness, length and width of various components in the embodiments of the present application shown in the drawings, and the overall thickness, length and width of the integrated device are only exemplary and should not constitute any limitation on the present application.

[0037] The "multiple" appearing in the present application refers to two or more (including two).

[0038] At present, from the development of market situation, the application of battery is more and more extensive. The battery is not only applied to the energy storage power supply system of hydropower, thermal power, wind power and solar power station, but also widely used in electric bicycles, electric motorcycles, electric vehicles and other electric vehicles, military equipment, aerospace and other fields. With the continuous expansion of the application field of battery device, the market demand is also increasing.

[0039] In the production process of the battery, the slurry is coated on the surface of the substrate, and then baked to form the pole piece. During the baking process, the position of the substrate without coating the slurry is easy to warp and deform due to the lighter weight, and then the pole piece is prone to cracking.

[0040] Based on the above technical problems, the embodiment of the present application provides a roller device, which comprises a roller body and a support. The roller body has alternating blanking areas and coating areas along its own axial direction, the number of the coating areas is at least two, and the blanking area between the adjacent two coating areas is the first blanking area. The support is in a ring structure, the support is sleeved on the outer periphery of the roller body and rotates synchronously with the roller body, and the first blanking area is provided with the support.

[0041] By providing the support on the roller body, the support can support the area of the film piece that is easy to warp and deform, improve the problem that the pole piece is prone to cracking during drying, and facilitate to improve the forming quality of the pole piece.

[0042] The roller device provided by the embodiment of the present application can be produced and sold independently as an independent component, and the roller device can also be used in a drying equipment and as a part of the drying equipment.

[0043] Please refer to Figures 1 to 5 According to the embodiment of the present application, a roller device 100 is provided, which comprises a roller body 10 and a support 20. The roller body 10 has alternating blanking areas 11 and coating areas 12 along its own axial direction X, the number of the coating areas 12 is at least two, and the blanking area 11 between the adjacent two coating areas 12 is the first blanking area 111. The support 20 is in a ring structure, the support 20 is sleeved on the outer periphery of the roller body 10 and rotates synchronously with the roller body 10, and the first blanking area 11 is provided with the support 20.

[0044] It can be understood that the pole piece includes a main body part and a tab part, before the pole piece is formed, the slurry needs to be coated on the substrate, the substrate after coating can be called a film piece, and the film piece after drying can be cut to obtain a plurality of pole pieces. Among them, the area of the film piece coated with slurry can be called the main body part, and the area of the film piece not coated with slurry can be called the tab part.

[0045] Some diaphragms may have a main body, an electrode tab, and another main body in sequence along their width direction; others may have a main body, an electrode tab, a main body, and so on, with the electrode tab and the main body in sequence along their width direction. The width direction of the diaphragm is parallel to the axial direction X of the roller 10.

[0046] Depend on Figure 5 As shown, the film can be supported and wound by the roller device 100 for drying in the oven 200. The tabs located between two adjacent main bodies are lighter in weight because they are not coated with slurry. They are prone to bulging upwards due to the influence of wind. When they pass through the roller, the bulging tabs will be stretched flat under tension, making the connection area between the tabs and the main body prone to cracking, which directly affects the forming quality of the electrode sheet.

[0047] Therefore, the roller passing device 100 provided in some embodiments of this application, by providing a support member 20 that can rotate synchronously on the roller body 10, and the support member 20 is provided corresponding to the part of the film that is prone to bulging, when the film passes through the roller body 10, the support member 20 can support the bulging electrode tabs, so that they will not flatten due to tension, which can improve the problem that the electrode is prone to cracking during the drying process, thereby improving the forming quality of the electrode.

[0048] The roller 10 is rotatable about its own axial direction X, and is used to support and transport the film sheet undergoing the drying process. The roller conveying device 100 may also include a driven roller for use in conjunction with the roller 10 to transport the film sheet.

[0049] The number of rollers 10 can be set to one, two, or more. Multiple rollers 10 can be distributed at intervals along the movement direction of the diaphragm, wherein the movement direction of the diaphragm intersects the axial direction X of the rollers 10.

[0050] like Figure 1 As shown, the roller 10 has alternating blank areas 11 and coating areas 12 along its own axial direction X. There are at least two coating areas 12. This can be understood as the blank areas 11 corresponding to the tabs of the diaphragm, and the coating areas 12 corresponding to the main body of the diaphragm. Some rollers 10 may have coating areas 12, blank areas 11, and coating areas 12 sequentially along the axial direction X; others may have coating areas 12, blank areas 11, ..., blank areas 11, and coating areas 12 sequentially along the axial direction X.

[0051] The number of blank areas 11 can be set to one, two, or more. The number of coating areas 12 is at least two. It can be understood that the blank areas 11 correspond to the tabs of the diaphragm, and the coating areas 12 correspond to the main body of the diaphragm.

[0052] Optionally, some of the film sheets can also have, along the width direction of the film sheets, a tab portion, a main body portion, a tab portion, a main body portion, a tab portion in sequence, and some of the film sheets can also have, along the width direction of the film sheets, a tab portion, a main body portion, a tab portion,..., a main body portion, a tab portion in sequence, wherein the tab portions located on both sides of the film sheets along the width direction are less likely to be raised under the tension of the passing roller.

[0053] For ease of description, the tab portion located between the two adjacent main body portions can be referred to as a first tab portion, and the tab portions located on both sides of the film sheet along the width direction can be referred to as second tab portions.

[0054] Optionally, some of the roller bodies 10 can have, along the axial direction X, a white space 11, a coating area 12, a white space 11, a coating area 12, a white space 11 in sequence, and some of the roller bodies 10 can also have, along the axial direction X, a white space 11, a coating area 12, a white space 11,..., a coating area 12, a white space 11 in sequence, wherein the white space 11 located between the two adjacent coating areas 12 is a first white space 111, corresponding to the first tab portion on the film sheet, and the white space 11 located on both sides of the roller body 10 along the axial direction X is a second white space 112, corresponding to the second tab portion on the film sheet.

[0055] When the film sheet passes through the roller body 10, the coating area 12 can support the main body portion, the second white space 112 can support the second tab portion, and the support member 20 provided in the first white space 111 can support the first tab portion raised upward, so that the raised first tab portion will not be flattened under the action of tension, thereby avoiding the cracking phenomenon of the joint between the first tab portion and the main body portion under the action of stress, and facilitating the improvement of the forming quality of the pole piece.

[0056] The support member 20 is sleeved on the outer periphery of the roller body 10 to be arranged protruding from the outer peripheral surface 101 of the roller body 10, and the support member 20 is used to support the first tab portion of the film sheet.

[0057] In some embodiments, the support member 20 is provided separately from the roller body 10, which facilitates to reduce the processing difficulty and improve the use flexibility of the passing roller device 100.

[0058] Optionally, the support member 20 can be fixedly connected with the roller body 10 by welding, bonding or the like process.

[0059] Optionally, the support member 20 can also be detachably connected with the roller body 10 by fasteners such as bolts, screws or the like.

[0060] In other embodiments, the support member 20 and the roller body 10 are of an integrated structure, which facilitates to improve the manufacturing efficiency and also improves the connection strength therebetween, thereby improving the reliability of the passing roller device 100.

[0061] In some embodiments, at least part of the support 20 can be arranged in abutment with the outer circumferential surface 101 of the roller body 10, so that the support 20 can rotate synchronously with the roller body 10.

[0062] In other embodiments, the inner annular surface 21 of the support 20 can have a gap with the outer circumferential surface 101 of the roller body 10, and the support 20 can be supported by a bracket to be sleeved on the outer circumference of the roller body 10 and to rotate synchronously with the roller body 10 through the driving of the driving member.

[0063] Optionally, the support 20 and the roller body 10 can be arranged in a coaxial structure, or in a non-coaxial structure.

[0064] Optionally, the second blank area 112 can also be provided with the support 20.

[0065] In some optional embodiments, the support 20 is coaxially arranged with the roller body 10.

[0066] In this way, the assembly and processing of the support 20 and the roller body 10 are facilitated, the complexity of processing is reduced, and the support 20 can better support the area of the diaphragm that is not coated with the paste.

[0067] As shown in Figure 1 In some optional embodiments, the number of the first blank areas 111 is at least two.

[0068] The number of the first blank areas 111 can be two, three, or even more. The at least two first blank areas 111 are spaced apart along the axial direction X, and the coating area 12 is arranged between adjacent two first blank areas 111.

[0069] In this way, the roller device 100 can support the diaphragm that can be cut into multiple pole pieces, and cost savings are facilitated.

[0070] In some optional embodiments, the support 20 is detachably connected to the roller body 10.

[0071] In this way, the maintenance and replacement of the support 20 are facilitated, and the support 20 can be detached from the roller body 10 according to needs, so as to improve the use flexibility of the roller device 100.

[0072] In some optional embodiments, the support 20 is movably connected to the roller body 10 along the axial direction X.

[0073] In this way, when the roller device 100 is used to support diaphragms of different specifications, it is not necessary to replace the roller device 100, but only to move the position of the support 20 on the roller body 10, so as to adjust the position of the first blank area 111, so that the roller device 100 can be applied to diaphragms of different specifications, and the versatility of the roller device 100 is improved.

[0074] In some optional embodiments, the passing roller device 100 further comprises a moving member, which is arranged on the roller body 10, and the support member 20 is movably connected to the roller body 10 through the moving member.

[0075] In this way, the effectiveness of the movement of the support member 20 relative to the roller body 10 is ensured.

[0076] Optionally, the moving member can be a sliding rail extending along the axial direction X, and the support member 20 can be provided with a sliding block which is in sliding fit with the sliding rail.

[0077] Alternatively, the moving member can also be a sliding block, and the support member 20 can be provided with a sliding rail extending along the axial direction X.

[0078] Optionally, the moving member can also be a ball or other components.

[0079] Please refer to Figure 2 and Figure 3 In some optional embodiments, the support member 20 has an inner annular surface 21 and an outer annular surface 22, the inner annular surface 21 faces the roller body 10, and the outer annular surface 22 faces away from the roller body 10, and the inner annular surface 21 is arranged in abutment with the outer peripheral surface 101 of the roller body 10.

[0080] Such design makes the connection of the support member 20 and the roller body 10 more compact, so as to reduce the space occupation, improve the space utilization of the passing roller device 100, and facilitate the synchronous rotation of the support member 20 and the roller body 10.

[0081] The inner annular surface 21 of the support member 20 and the outer peripheral surface 101 of the roller body 10 have the same shape, so that they can be arranged in abutment.

[0082] In some embodiments, the inner annular surface 21 and the outer annular surface 22 are arranged in opposite directions along the radial direction Y, and the support member 20 further has a side annular surface connected between the inner annular surface 21 and the outer annular surface 22, and the inner annular surface 21, the outer annular surface 22 and the side annular surface enclose a cavity.

[0083] Optionally, the inner annular surface 21 and the outer annular surface 22 have the same curvature or bending degree.

[0084] In other embodiments, the inner annular surface 21 and the outer annular surface 22 are connected and enclose a cavity.

[0085] Optionally, the curvature of the inner annular surface 21 is smaller than that of the outer annular surface 22.

[0086] In some optional embodiments, the inner annular surface 21 has opposite first and second ends 211 and 212 along the axial direction X, the outer annular surface 22 has opposite third and fourth ends 221 and 222 along the axial direction X, the first end 211 is connected to the third end 221, and the second end 212 is connected to the fourth end 222, and from the third end 221 to the fourth end 222, the outer annular surface 22 and the outer circumferential surface 101 of the roller body 10 have a distance along the radial direction Y that first increases and then decreases.

[0087] In this way, the shape of the outer annular surface 22 of the support 20 can be adapted to the shape of the first tab after the first tab is raised on the diaphragm, so that the support 20 can better support the area of the diaphragm that is not coated with slurry.

[0088] Alternatively, the third end 221 can be in contact with the outer circumferential surface 101, and of course, the two can also have a certain gap along the radial direction Y. Correspondingly, the fourth end 222 can be in contact with the outer circumferential surface 101, and of course, the two can also have a certain gap along the radial direction Y.

[0089] From the third end 221 to the fourth end 222, the outer annular surface 22 and the outer circumferential surface 101 have a distance along the radial direction Y that first increases and then decreases, which can be understood as the distance between the part of the outer annular surface 22 between the third end 221 and the fourth end 222 and the outer circumferential surface 101 along the radial direction Y being greater than the distance between the third end 221 and the outer circumferential surface 101 along the radial direction Y and the distance between the fourth end 222 and the outer circumferential surface 101 along the radial direction Y.

[0090] In some optional embodiments, the cross section of the outer annular surface 22 along the circumferential direction Z of the support 20 is arc-shaped.

[0091] From the third end 221 to the fourth end 222, Figure 4 It can be seen that the outer annular surface 22 is arc-shaped, and the cross section of the support 20 along the circumferential direction Z is similar to a semicircle.

[0092] Such a design can further improve the matching degree of the outer annular surface 22 of the support 20 and the shape of the diaphragm after the diaphragm is raised.

[0093] Alternatively, the outer annular surface 22 is convexly arranged towards the side away from the inner annular surface 21.

[0094] In some optional embodiments, the maximum distance between the outer annular surface 22 and the outer circumferential surface 101 along the radial direction Y is between 3 mm and 7 mm.

[0095] The maximum distance between the outer annular surface 22 and the outer circumferential surface 101 along the radial direction Y can be understood as the distance between the middle position of the outer annular surface 22 and the outer circumferential surface 101 along the radial direction Y.

[0096] If the maximum distance between the outer ring surface 22 and the outer peripheral surface 101 in the radial direction Y is too small, that is, less than 3 mm, the support piece 20 can not be able to achieve the effect of supporting the first tab part, that is, when the film passes through the roller body 10, there is a gap between the support piece 20 and the first tab part, and the first tab part will be pulled flat under the action of tension, and the risk of cracking of the tab still exists; if the maximum distance between the outer ring surface 22 and the outer peripheral surface 101 in the radial direction Y is too large, that is, greater than 7 mm, when the film passes through the roller body 10, the support piece 20 can continue to lift the first tab part upward, and the stress in the connecting area between the first tab part and the main body part is easy to cause cracking.

[0097] Therefore, setting the maximum distance between the outer ring surface 22 and the outer peripheral surface 101 in the radial direction Y to be between 3 mm and 7 mm, and including both end values of 3 mm and 7 mm, can further improve the supporting effect of the support piece 20 on the area of the film that is not coated with slurry.

[0098] Please refer to Figure 4 In some optional embodiments, the number of the blank areas 11 is multiple, and the blank areas 11 located on both sides of the roller body 10 in the axial direction X are second blank areas 112, and the second blank areas 112 are provided with the support pieces 20.

[0099] Such a design can be aimed at the area of the film that is not coated with slurry on both sides, that is, the second tab part also occurs to be lifted, which is beneficial to improve the use flexibility.

[0100] Please refer to Figure 5 The application also provides a drying device, which comprises an oven 200 and the over roller device 100 provided by any one of the above embodiments, and the over roller device 100 is arranged in the interior of the oven 200.

[0101] Since the over roller device 100 provided by the application can alleviate the problem of cracking of the film, which is beneficial to improve the forming quality of the tab, the drying device provided by the application is beneficial to improve the forming quality of the tab.

[0102] In some optional embodiments, the oven 200 is provided with a first air outlet 210 on one side in the first direction A and a second air outlet 220 on the other side. In the first direction A, the height position of the first air outlet 210 is higher than that of the second air outlet 220, the over roller device 100 is located between the first air outlet 210 and the second air outlet 220, and the minimum distance between the over roller device 100 and the first air outlet 210 is greater than the minimum distance between the over roller device 100 and the second air outlet 220.

[0103] The first air outlet 210 can be arranged at the top of the oven 200, and the number of the first air outlet 210 can be at least two; the second air outlet 220 can be arranged at the bottom of the oven 200, and the number of the second air outlet 220 can be at least two, wherein the first air outlet 210 and the second air outlet 220 are staggered in the first direction A.

[0104] Since the first air outlet 210 is relatively close to the second air outlet 220 and the roller device 100, when the first air outlet 210 and the second air outlet 220 draw air into the oven 200, the area of the film on the roller device 100 that is not coated with slurry is prone to being blown upward by the air drawn in by the second air outlet 220. Since the roller device 100 is provided with a support 20, it can support the area of the film that is raised, thereby alleviating the problem of film cracking and improving the forming quality of the pole piece.

[0105] Please refer to Figures 1 to 3 The embodiment of the present application provides a roller device 100, which comprises a roller body 10, a support 20 and a moving part.

[0106] The roller body 10 has alternating blank areas 11 and coating areas 12 along the axial direction X thereof, the number of the blank areas 11 is multiple, and the number of the coating areas 12 is at least two. The blank area 11 between two adjacent coating areas 12 is a first blank area 111, and the blank areas 11 on both sides of the roller body 10 along the axial direction X are second blank areas 112. The support 20 is annular and is sleeved on the outer periphery of the roller body 10. The support 20 is detachably connected to the roller body 10, and the support 20 rotates synchronously with the roller body 10 and is coaxially arranged with the roller body 10. The first blank area 111 is provided with the support 20.

[0107] The support 20 has an inner annular surface 21 and an outer annular surface 22. The inner annular surface 21 faces the roller body 10, and the outer annular surface 22 faces away from the roller body 10. The inner annular surface 21 is arranged in close contact with the outer peripheral surface 101 of the roller body 10, and the outer annular surface 22 has an arc-shaped structure in the circumferential direction Z of the support 20. The inner annular surface 21 has opposite first and second ends 211 and 212 along the axial direction X, and the outer annular surface 22 has opposite third and fourth ends 221 and 222 along the axial direction X. The first end 211 is connected to the third end 221, and the second end 212 is connected to the fourth end 222. From the third end 221 to the fourth end 222, the distance between the outer annular surface 22 and the outer peripheral surface 101 of the roller body 10 along the radial direction Y of the roller body 10 first increases and then decreases.

[0108] The moving part is arranged on the roller body 10, and the support 20 is movably connected to the roller body 10 through the moving part. The maximum distance between the outer annular surface 22 and the outer peripheral surface 101 of the roller body 10 in the radial direction Y is between 3 mm and 7 mm.

[0109] It should be explained that the embodiments in the present application and the features in the embodiments can be combined with each other in the case of no conflict.

[0110] Finally, it should be explained that the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for some technical features therein, but these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A roller passing device characterized by comprising: The roller body has alternating blank areas and paint areas along the axial direction of the roller body, the number of the paint areas is at least two, and the blank area between two adjacent paint areas is a first blank area. The support member is annular and is sleeved on the outer periphery of the roller body and rotates synchronously with the roller body, and the first blank area is provided with the support member. The support member is coaxial with the roller body.

2. The roller arrangement of claim 1, wherein The number of the first blank areas is at least two.

3. The roller arrangement of claim 1, wherein, The support member is detachably connected to the roller body.

4. The roller arrangement of claim 1, wherein The support member is movably connected to the roller body along the axial direction.

5. The roller assembly of claim 1, wherein, The roller device further comprises a moving member arranged on the roller body, and the support member is movably connected to the roller body through the moving member.

6. The roller arrangement of claim 5, wherein, The support member has an inner annular surface facing the roller body and an outer annular surface facing away from the roller body, and the inner annular surface is arranged in abutment with the outer peripheral surface of the roller body.

7. The roller arrangement according to any one of claims 1 to 6, characterized in that The inner annular surface has opposite first and second ends along the axial direction, and the outer annular surface has opposite third and fourth ends along the axial direction, the first end is connected to the third end, and the second end is connected to the fourth end, and the distance between the outer annular surface and the outer peripheral surface of the roller body along the radial direction of the roller body increases first and then decreases from the third end to the fourth end.

8. The roller arrangement of claim 7, wherein, The cross section of the outer annular surface in the circumferential direction of the support member has an arc structure.

9. The roller arrangement of claim 8, wherein, The maximum distance between the outer annular surface and the outer peripheral surface of the roller body in the radial direction is between 3 mm and 7 mm.

10. The roller arrangement of claim 8, wherein, The number of the blank areas is multiple, and the blank areas located on both sides of the roller body along the axial direction are second blank areas, and the second blank areas are provided with the support member.

11. The roller arrangement according to any one of claims 1 to 6, characterized in that The roller device comprises:

12. A drying apparatus, characterized by, an oven; the roller device according to any one of claims 1 to 11 is arranged in the interior of the oven. The oven is provided with a first air outlet on one side in a first direction and a second air outlet on the other side; 13. The drying apparatus according to claim 12, characterized in that, in the first direction, the height position of the first air outlet is higher than that of the second air outlet, the roller device is located between the first air outlet and the second air outlet, and the minimum distance between the roller device and the first air outlet is greater than that between the roller device and the second air outlet. ​

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