Rolling aluminum foil spraying cooling mechanism and conveying device

Abstract

The utility model provides a spraying and cooling mechanism for rolling aluminum foil and a conveying device, and relates to the technical field of aluminum foil rolling equipment. The rolling aluminum foil spraying cooling mechanism comprises a spraying pipe which extends from one end to the other end and is hollow inside, the spraying pipe is provided with drainage sections on the two sides and a second spraying section in the middle, and an opening is formed in the second spraying section; the sleeve is arranged outside the spraying pipe in a sleeving manner, and a plurality of groups of spraying holes are formed in the sleeve at intervals; wherein the sleeve is rotationally connected with the spraying pipe, the sleeve and the spraying pipe can relatively rotate in the circumferential direction, multiple sets of spraying holes in the sleeve are sequentially aligned with openings in the second spraying section in the rotating process, the spraying direction of cooling liquid sprayed by the cooling mechanism is continuously changed, and the spraying width of the spraying liquid on the lower transmission line is increased; the cooling liquid covering width of the spraying cooling device can be increased, cooling liquid is evenly sprayed in the conveying direction of rolled aluminum foil, and therefore cost is reduced, and the structural complexity of field equipment is reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of aluminum foil rolling equipment, specifically to a rolling aluminum foil spray cooling mechanism and a conveying device. Background Technology

[0002] Electrolytic aluminum foil is a product made by electrochemically or chemically etching specially treated high-purity aluminum foil to increase its surface area, followed by electrochemical formation to form an oxide film (aluminum oxide) on the surface. It is mainly used in the manufacture of aluminum electrolytic capacitors. In the manufacturing process of electrolytic aluminum foil, the aluminum foil needs to be rolled first. After rolling to the required thickness, the aluminum foil needs to be cooled evenly to avoid surface defects.

[0003] In existing technologies, the aluminum foil needs to be cooled during the rolling process to achieve the required thickness. This is typically done by setting up multiple cooling mechanisms to expand the effective cooling width and ensure a uniform and effective cooling process. However, to achieve the required cooling, the multiple sets of spray pipes and other devices in the cooling mechanism increase costs and occupy a significant amount of space. This can also hinder emergency handling of on-site situations and is detrimental to the long-term stable operation of the aluminum foil rolling and conveying system. Utility Model Content

[0004] This invention addresses the problem that existing cooling mechanisms, such as multiple spray pipes, increase costs and occupy significant space above the transmission line, hindering emergency handling and the stable operation of aluminum foil rolling and transmission systems. It provides a rolling aluminum foil spray cooling mechanism and transmission device that increases the coolant coverage width without occupying a large space above the transmission line, allowing for uniform spraying of coolant along the transmission direction of the rolled aluminum foil.

[0005] The technical solution adopted in this utility model is:

[0006] A spray cooling mechanism for rolled aluminum foil, comprising:

[0007] A spray pipe extends from one end to the other and is hollow inside. The spray pipe has drainage sections on both sides and a second spray section in the middle, the second spray section being provided with an opening; and

[0008] A sleeve is fitted over the outside of the spray pipe, and multiple sets of spray holes are spaced apart on the sleeve;

[0009] The sleeve is rotatably connected to the spray pipe, and the two can rotate relative to each other in the circumferential direction. During the rotation, the multiple sets of spray holes on the sleeve are aligned with the openings on the second spray section in sequence, and the spray direction of the cooling liquid sprayed by the rolled aluminum foil spray cooling mechanism is continuously changed, thereby expanding the spray width of the spray liquid on the lower transmission line.

[0010] Furthermore, a first spray section and a third spray section are respectively provided between the second spray section and the two side drainage sections; both the first spray section and the third spray section are provided with multiple spray holes along the axial direction of the spray pipe.

[0011] Furthermore, it also includes: a motor; the output end of the motor is connected to a transmission rod, the other end of the transmission rod is provided with a second transmission gear, and one end of the sleeve is provided with a first transmission gear, the first transmission gear meshing with the second transmission gear, so that the sleeve can be driven to rotate by the motor.

[0012] Furthermore, a sleeve portion is provided on the side of the spray pipe facing the transmission rod, the sleeve portion is sleeved on the middle of the transmission rod, and the sleeve portion and the transmission rod are rotatably connected by a bearing.

[0013] Furthermore, the opening angle α1 above the transmission line is 60°~150°.

[0014] Furthermore, the sleeve is provided with three sets of spray holes at intervals, and the interval angle α2 between the three sets of spray holes is 120°.

[0015] Furthermore, the second spray section has annular grooves at both ends, and an inner convex ring is provided on the inner side of the opening at both ends of the sleeve. The inner convex ring is embedded in the annular groove, and the inner convex ring is rotatably connected to the inner wall of the annular groove through a bearing.

[0016] A rolling aluminum foil conveying device, comprising:

[0017] A conveyor roller conveyor having connecting frames on both sides and a drive roller between the connecting frames on both sides; and

[0018] The rolled aluminum foil spray cooling mechanism described above is located above the conveyor roller and connected between the connecting frames on both sides.

[0019] Furthermore, a baffle is provided above the connecting frame along the conveying direction of the conveyor roller, and the inner side of the baffle is inclined from top to bottom toward the inner side of the conveyor roller; and a water collection plate is provided below the conveyor roller.

[0020] Furthermore, the inner surface of the baffle is a curved surface that gradually concaves from both ends near the transmission roller toward the center.

[0021] The beneficial effects of this utility model are:

[0022] 1. The cooling mechanism of this utility model is provided with a second spray section in the middle of the spray pipe and a sleeve rotatably sleeved outside the second spray section. Multiple sets of spray holes arranged at intervals on the sleeve cooperate with the opening of the second spray section, and the sleeve is driven to rotate by a motor. This allows the cooling mechanism to continuously change the spray angle during operation, thereby expanding the spray width. This solves the problem that the multiple sets of spray pipes and other devices in the existing cooling mechanism cause increased costs and occupy a lot of space above the transmission line. When emergency handling of some on-site situations is required, it becomes an obstacle, which is not conducive to the rolling of aluminum foil and the long-term stable operation of the transmission system.

[0023] 2. The transmission device of this utility model, by setting the above-mentioned cooling mechanism, utilizes the second spray section in the middle of the spray pipe of the cooling mechanism, and the sleeve rotatably sleeved outside the second spray section. By using multiple sets of spray holes spaced apart on the sleeve to cooperate with the opening of the second spray section, and relying on the motor to drive the sleeve to rotate, the cooling mechanism can continuously change the spray angle during operation, thereby realizing the expansion of the spray width. This solves the problem that the multiple sets of spray pipes and other devices in the existing cooling mechanism cause increased costs and occupy a large amount of space above the transmission line, which can hinder the rolling of aluminum foil and the long-term stable operation of the transmission system when emergency handling of some on-site situations is required. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a perspective view of the transmission device according to an embodiment of the present utility model;

[0026] Figure 2 This is a three-dimensional schematic diagram of the spray pipe according to an embodiment of the present utility model;

[0027] Figure 3 This is a rear view of the spray pipe according to an embodiment of the present utility model;

[0028] Figure 4 This utility model Figure 3 Middle AA side sectional view;

[0029] Figure 5 This is a three-dimensional schematic diagram of the sleeve according to an embodiment of the present utility model;

[0030] Figure 6 This is a rear view of the sleeve according to an embodiment of the present utility model;

[0031] Figure 7 This utility model Figure 6 Side sectional view of BB.

[0032] Reference numerals: 100-spray pipe, 110-drainage section, 120-first spray section, 122-sleeve part, 130-second spray section, 131-annular groove, 132-opening, 140-third spray section;

[0033] 200 - Sleeve, 210 - Inner convex ring, 220 - First transmission gear;

[0034] 300 - Motor, 320 - Transmission rod, 322 - Second transmission gear;

[0035] 400 - Mounting bracket;

[0036] 500 - Conveyor roller, 510 - Drive roller, 520 - Connecting frame, 522 - Baffle;

[0037] α1 - opening angle, α2 - interval angle. Detailed Implementation

[0038] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0039] The following disclosure provides many different embodiments or examples for implementing various structures of this invention. To simplify the disclosure, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the scope of this invention.

[0040] The embodiments of the utility model will now be described in detail with reference to the accompanying drawings.

[0041] Example 1

[0042] Existing cooling mechanisms in the rolling aluminum foil conveying process typically require multiple sets of spray pipes to uniformly spray coolant in the conveying direction of the rolled aluminum foil to achieve the required cooling. However, setting up multiple sets of cooling mechanism spray pipes increases costs, obstructs space, and creates obstacles when emergency handling of some on-site situations is needed, which is not conducive to the long-term stable operation of the aluminum foil rolling and conveying system.

[0043] This embodiment provides a spray cooling mechanism for rolled aluminum foil, used to uniformly spray and cool the foil during its transport. This mechanism increases the coolant coverage width without occupying a large space above the transport line, allowing for uniform spraying of coolant along the transport direction of the rolled aluminum foil, thereby reducing costs and simplifying the on-site equipment structure. Please refer to [link to relevant documentation]. Figures 1-7 The rolled aluminum foil spray cooling mechanism is located above the aluminum foil transmission line. The rolled aluminum foil spray cooling mechanism mainly includes: a spray pipe 100, a sleeve 200 sleeved on the spray pipe 100, a motor 300 driving the sleeve 200, and mounting brackets 400 on both sides of the spray pipe 100.

[0044] The spray pipe 100 is hollow inside, used to introduce coolant and evenly spray the coolant onto the surface of the aluminum foil that needs to be cooled after rolling. Figures 2-4As shown, the spray pipe 100 extends from one end to the other, and is generally tubular with a circular cross-section. Both ends of the spray pipe 100 are guide sections 110 for introducing coolant, and the middle section is the spray section for spraying coolant. The guide sections 110 at both ends are generally circular tubes with a small diameter, mainly used to introduce coolant from the openings at both ends or one end. The guide sections 110 also serve as the connecting parts between the spray pipe 100 and the mounting bracket 400, thereby fixing the spray pipe 100 above the aluminum foil transmission line. Meanwhile, the middle spray section is divided into a first spray section 120, a second spray section 130, and a third spray section 140 from one end to the other. The first spray section 120 and the third spray section 140 are located on both sides of the second spray section 130 and are positioned above the aluminum foil transmission line, directly opposite the two sides of the aluminum foil. The first spray section 120 and the third spray section 140 are roughly circular tubes with a diameter larger than that of the diversion section 110. Both the first spray section 120 and the third spray section 140 have multiple spray holes along the axial direction of the spray pipe 100 for spraying the aluminum foil near the two sides during the transmission process. The second spray section 130 in the middle is roughly cylindrical and has a larger diameter than other parts of the spray pipe 100. Annular grooves 131 are provided at the connection points between the second spray section 130 and the first spray section 120 and the third spray section 140. The second spray section 130 also has an opening 132 on the side facing the transmission line below. The opening 132 is roughly rectangular, with its two opposite sides perpendicular to the axial direction of the spray pipe 100 approaching the two ends of the second spray section 130. The two opposite sides of the opening 132 parallel to the axial direction of the spray pipe 100 form two lines with the axis of the spray pipe 100. The included angle between the two lines forms the opening angle α1 of the opening 132 above the transmission line. In this embodiment, the opening angle α1 of the opening 132 is 120°. The opening 132 is mainly used to expand the spray width by cooperating with the rotation of the sleeve 200.

[0045] The sleeve 200 is rotatably fitted onto the second spray section 130 of the spray pipe 100, and is used to change the spray angle of the second spray section 130 by rotation. Figures 5-7As shown, the sleeve 200 is generally cylindrical, and its inner diameter is adapted to the outer diameter of the second spray section 130. The sleeve 200 is sleeved on the outside of the second spray section 130, and the sleeve 200 is open at both ends. The inner side of each of the two openings is provided with an inner convex ring 210. The inner convex ring 210 at both ends is respectively embedded in the annular groove 131 at both ends of the second spray section 130. The inner convex ring 210 and the inner wall of the annular groove 131 are rotatably connected by bearings, so that the sleeve 200 can rotate relative to the spray pipe 100 in the circumferential direction. Meanwhile, three sets of spray holes are provided on the side of the sleeve 200. Each set of spray holes includes multiple spray holes, which are distributed along the axial direction of the spray pipe 100. The center lines of the three sets of spray holes form three lines with the axis of the spray pipe 100. The included angle between the three lines is the interval angle α2. In this embodiment, the three sets of spray holes are evenly arranged, and the interval angle α2 between the three lines is 120°. When the sleeve 200 and the spray pipe 100 rotate relative to each other in the circumferential direction, the three sets of spray holes pass through the interval of the opening 132 in sequence. When they coincide with the opening 132, they spray coolant downwards. As the rotation process proceeds, the spray direction can be continuously changed within the range of the opening angle α1. In addition, a first transmission gear 220 is provided on the outer side of the sleeve 200 near the first spray section 120. The first transmission gear 220 is connected to the outer wall of the sleeve 200 and is arranged around the spray pipe 100 without contacting the spray pipe 100, so as not to affect the relative rotation between the sleeve 200 and the spray pipe 100. At the same time, the first transmission gear 220 is mainly used to enable the sleeve 200 to be driven by the motor 300.

[0046] A motor 300 is mounted on the side of the aluminum foil transmission line. The motor 300 includes a motor body and a reduction gear mechanism. It drives the sleeve 200 to rotate via a transmission rod 320. In this embodiment, both the motor body and the reduction gear mechanism are housed within a housing. Their output ends are connected to one end of the transmission rod 320, allowing the transmission rod 320 to rotate along its own axial direction. The transmission rod 320 extends from the motor housing towards the sleeve 200 and is parallel to the axial direction of the spray pipe 100. A second transmission gear 322 is located at the end of the transmission rod 320 near the sleeve 200, and this second transmission gear 322 meshes with the first transmission gear 220.

[0047] The mounting bracket 400 is disposed on both sides of the guide section 110 of the spray pipe 100, and is used to connect the spray pipe 100 and the aluminum foil transmission line below. In this embodiment, the aluminum foil transmission line uses the transmission roller 500 for transmission. The mounting bracket 400 includes two plate-shaped mounting fasteners, which are symmetrically disposed on the edges of both sides of the transmission roller 500. Each mounting fastener has a through hole on its upper part for embedding the guide sections 110 at both ends of the spray pipe 100. The guide sections 110 at both ends of the spray pipe 100 pass through the through hole. One or both guide sections 110 are connected to the liquid inlet pipe for introducing coolant into the spray pipe 100.

[0048] One specific working method of this embodiment is as follows:

[0049] When the rolled aluminum foil is conveyed on the roller conveyor, the spray cooling mechanism is activated simultaneously, coolant is introduced and driven to rotate by the motor 300. When the aluminum foil passes under the spray cooling mechanism, the first spray section 120 and the third spray section 140 at both ends of the spray pipe 100 spray coolant vertically downwards to spray a narrow width range. At the same time, the second spray section 130 in the middle, under the rotation of the sleeve 200, sprays a set of spray holes starting from a direction that rotates 60° clockwise from the vertical direction and stops spraying when it reaches a direction that rotates 60° counterclockwise from the vertical direction. Then the next set of spray holes starts again from a direction that rotates 60° clockwise from the vertical direction and repeats the rotational spraying. This cycle is repeated to expand the spray width in the middle area.

[0050] In summary, in this embodiment, the aluminum foil rolling spray cooling mechanism includes a second spray section 130 in the middle of the spray pipe 100 and a sleeve 200 rotatably sleeved outside the second spray section 130. Multiple sets of spray holes spaced apart on the sleeve 200 cooperate with the opening 132 of the second spray section 130, and the sleeve 200 is driven to rotate by the motor 300. This allows the cooling mechanism to continuously change the spray angle during operation, thereby expanding the spray width. This solves the problem in the prior art where the multiple sets of spray pipes and other devices in the cooling mechanism increase costs and occupy a large amount of space above the transmission line, creating obstacles when emergency situations need to be handled, which is detrimental to the long-term stable operation of the aluminum foil rolling and transmission system.

[0051] Meanwhile, this embodiment also includes first spray sections 120 and third spray sections 140 on both sides of the second spray section 130. By using the non-rotating first spray sections 120 and third spray sections 140, the spray width on both sides of the aluminum foil is reduced. Since the aluminum foil dissipates heat faster on both sides and slower in the middle, the temperature of the aluminum foil perpendicular to its transmission direction can be more even, thereby reducing defects such as edge waviness and rib waviness caused by uneven temperature, thus improving product quality. Furthermore, the non-rotating first spray sections 120 and third spray sections 140 on both sides can also avoid the splashing of a large amount of coolant after the rotating spray collides with the edge of the aluminum foil, saving resources and reducing the environmental impact of the spraying.

[0052] In addition, in this embodiment, a sleeve portion 122 is provided on the side of the first spray section 120 facing the transmission rod 320. The sleeve portion 122 is provided with a through hole, which is sleeved in the middle of the transmission rod 320. The inner sidewalls at both ends of the through hole are rotatably connected to the transmission rod 320 through bearings, thereby providing support in the middle of the transmission rod 320 and making the transmission operation of the spray cooling mechanism more stable and firm.

[0053] Preferably, in this embodiment, nozzles can also be provided in each spray hole to spray coolant to enhance the spraying effect.

[0054] It should also be noted that in one or more other embodiments, the opening angle α1 of the opening 132 above the transmission line can preferably be 60°~150°, and the three sets of spray holes spaced apart on the sleeve 200 can also be changed to two sets, four sets, five sets, or more sets, and the interval angle α2 between the multiple sets of spray holes also changes accordingly.

[0055] Example 2

[0056] Based on the above embodiment of the rolled aluminum foil spray cooling mechanism, a rolled aluminum foil conveying device using the cooling mechanism is further proposed, and a second embodiment is provided below.

[0057] Please see Figure 1 The rolling aluminum foil conveying device in the second embodiment mainly includes the rolling aluminum foil spray cooling mechanism in the above embodiment, and the conveying roller conveyor 500 below the rolling aluminum foil spray cooling mechanism, etc. Figure 1 As shown, the conveyor roller conveyor 500 is used to transport aluminum foil from the rolling process to the next process. The conveyor roller conveyor 500 mainly consists of connecting frames 520 on both sides and drive rollers 510 between the connecting frames 520. The drive rollers 510 are rotatably mounted on the connecting frames 520 and driven by a drive mechanism. The rolled aluminum foil spray cooling mechanism is located between the connecting frames 520 on both sides and is connected to the connecting frames 520 on both sides through the lower ends of the mounting brackets 400 on both sides.

[0058] In this embodiment, the aluminum foil conveying device is equipped with the aluminum foil spray cooling mechanism described in the previous embodiment. The cooling mechanism features a second spray section 130 in the middle of the spray pipe 100, and a sleeve 200 rotatably fitted around the second spray section 130. Multiple sets of spray holes spaced apart on the sleeve 200 engage with the opening 132 of the second spray section 130. The sleeve 200 is driven to rotate by a motor 300, allowing the cooling mechanism to continuously change the spray angle during operation. This expands the spray width and solves the problem in the prior art where multiple sets of spray pipes and other devices in the cooling mechanism increase costs and occupy significant space above the transmission line, hindering emergency handling of on-site situations and impeding the long-term stable operation of the aluminum foil rolling and conveying system.

[0059] Meanwhile, in this embodiment, baffles 522 are also provided above the connecting frames 520 on both sides. The baffles 522 extend along the aluminum foil conveying direction, and the inner side of the cross-section of the baffles 522 along the aluminum foil conveying direction is inclined from top to bottom towards the inner side of the conveyor roller 500. This is to prevent the coolant sprayed from the spray pipe 100 from splashing onto the outside of the conveyor roller 500, so that the splashed coolant flows back to the bottom of the conveyor roller 500 and is collected by the water collection plate (not shown in the figure) below the conveyor roller 500. Furthermore, in this embodiment, the inner side of the baffles 522 is gradually concave from both ends near the two drive rollers 510 towards the middle, forming a curved surface, so that the coolant flows towards the middle of the baffles 522, which is to prevent the coolant from flowing into the drive shaft and drive assembly of the drive rollers 510.

[0060] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A spray cooling mechanism for rolled aluminum foil, characterized in that, Include: A spray pipe (100) extends from one end to the other and is hollow inside. The spray pipe (100) has drainage sections (110) on both sides and a second spray section (130) in the middle, the second spray section (130) being provided with an opening (132); and A sleeve (200) is fitted over the outside of the spray pipe (100), and multiple sets of spray holes are provided on the sleeve (200) at intervals; The sleeve (200) is rotatably connected to the spray pipe (100), and the two can rotate relative to each other in the circumferential direction. During the rotation, the multiple sets of spray holes on the sleeve (200) are aligned with the openings (132) on the second spray section (130) in sequence, and the spray direction of the cooling liquid sprayed by the rolling aluminum foil spray cooling mechanism is continuously changed, thereby expanding the spray width of the spray liquid on the lower transmission line.

2. The rolled aluminum foil spray cooling mechanism as described in claim 1, characterized in that, A first spray section (120) and a third spray section (140) are respectively provided between the second spray section (130) and the two side drainage sections (110); the first spray section (120) and the third spray section (140) are provided with a plurality of spray holes along the axial direction of the spray pipe (100).

3. The rolled aluminum foil spray cooling mechanism as described in claim 1, characterized in that, It also includes: a motor (300); the output end of the motor (300) is connected to a transmission rod (320), the other end of the transmission rod (320) is provided with a second transmission gear (322), and one end of the sleeve (200) is provided with a first transmission gear (220), the first transmission gear (220) meshes with the second transmission gear (322), so that the sleeve (200) can be driven to rotate by the motor (300).

4. The rolled aluminum foil spray cooling mechanism as described in claim 3, characterized in that, A sleeve (122) is provided on the side of the spray pipe (100) facing the transmission rod (320). The sleeve (122) is sleeved on the middle part of the transmission rod (320). The sleeve (122) and the transmission rod (320) are rotatably connected by a bearing.

5. The rolled aluminum foil spray cooling mechanism as described in claim 1, characterized in that, The opening angle α1 of the opening (132) above the transmission line is 60°~150°.

6. The rolled aluminum foil spray cooling mechanism as described in claim 1, characterized in that, The sleeve (200) is provided with three sets of spray holes at intervals, and the interval angle α2 between the three sets of spray holes is 120°.

7. The rolled aluminum foil spray cooling mechanism as described in claim 1, characterized in that, The second spray section (130) has annular grooves (131) at both ends, and an inner convex ring (210) is provided on the inner side of the opening at both ends of the sleeve (200). The inner convex ring (210) is embedded in the annular groove (131), and the inner convex ring (210) and the inner wall of the annular groove (131) are rotatably connected by a bearing.

8. A rolling aluminum foil conveying device, characterized in that, Include: A conveyor roller conveyor (500) has connecting frames (520) on both sides, and a drive roller (510) between the connecting frames (520) on both sides; and The rolled aluminum foil spray cooling mechanism as described in any one of claims 1-7 is disposed above the conveyor roller (500) and connected between the connecting frames (520) on both sides.

9. The rolling aluminum foil conveying device as described in claim 8, characterized in that, A baffle (522) is provided above the connecting frame (520) along the conveying direction of the conveying roller conveyor (500), and the inner side of the baffle (522) is inclined from top to bottom toward the inner side of the conveying roller conveyor (500); and a water collection plate is provided below the conveying roller conveyor (500).

10. The rolling aluminum foil conveying device as described in claim 9, characterized in that, The inner surface of the baffle (522) is a curved surface that gradually concaves from both ends near the transmission roller (510) toward the center.

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