Cap conveying device and cap supplying system
The cap conveying device uses a rail distribution assembly with a wheel and position shifting mechanism to efficiently direct caps to multiple conveying rails and handle jams, enhancing production efficiency.
Patent Information
- Application Number
- PCT/CN2025/084293
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2024-03-27
- Filing Date
- 2025-03-24
- Publication Date
- 2025-10-02
AI Technical Summary
Existing cap conveying devices struggle to efficiently supply caps to multiple filling lines with varying requirements, and there is a need for improved efficiency and quick handling of cap jams.
A cap conveying device with a rail distribution assembly featuring a wheel with paddles, a position sensor, and a driver to accurately direct caps to specific conveying rails, along with a position shifting device to handle jams, and a blowing device to enhance cap conveyance.
The device efficiently supplies caps to the appropriate conveying rails, improving production efficiency and quickly addressing jams, with a capacity of up to 24000 pieces per hour.
Smart Images

Figure CN2025084293_02102025_PF_FP_ABST
Abstract
Description
CAP CONVEYING DEVICE AND CAP SUPPLYING SYSTEMFIELD
[0001] The present disclosure relates to the field of packaging, specifically to the field of filling, and more specifically, to a cap conveying device and a cap supplying system with a cap conveying device.BACKGROUND
[0002] The contents of this section only provide background information related to the present disclosure, which may not necessarily constitute the conventional technology.
[0003] During the operation of a filling system, a container and a cap for a filling product need to be conveyed to filling lines. In a cap conveying device, a qualified cap is supplied to a cap conveying rail, and is then conveyed to the filling lines through the cap conveying rail. In order to improve production efficiency, it is desirable that the cap conveying device is provided with a plurality of cap conveying rails to convey the caps to a plurality of filling lines correspondingly, thereby meeting the requirements of the plurality of filling lines. Moreover, in order to further improve the efficiency of cap conveying, it is also desirable to quickly and accurately supply the cap to the corresponding cap conveying rail according to the supplying requirements, so as to meet the different cap supplying requirements of the plurality of cap conveying rails.SUMMARY
[0004] One objective of the present disclosure is to solve at least one of the above-mentioned problems.
[0005] An aspect of the present disclosure is to provide a cap conveying device, including: a cap supplying port; and a first conveying rail having a first inlet, wherein the first inlet faces the cap supplying port and is adapted to receive a cap supplied from the cap supplying port. The cap conveying device further includes: a second conveying rail having a second inlet, wherein the second inlet faces the cap supplying port and is adapted to receive a cap supplied from the cap supplying port; and a rail distribution assembly including a wheel arranged close to the cap supplying port, wherein the wheel is provided with a plurality of paddles spaced apart from one another in a circumferential direction, and one of the plurality of paddles can be positioned at the cap supplying port, the rail distribution assembly allows the cap to pass through a gap between the one paddle positioned at the cap supplying port and an adjacent paddle to enter the first conveying rail from the first inlet, or allows the wheel to be driven to rotate to push the cap to the second inlet by the one paddle.
[0006] In an embodiment, the plurality of paddles are uniformly arranged on an outer circumference of the wheel, and the gap between the one paddle and the adjacent paddle corresponds to an outer diameter of the cap or a width of the first conveying rail.
[0007] In an embodiment, the rail distribution assembly further includes a driver and a position sensor, wherein the position sensor is configured to detect a rotational position of the wheel when the cap conveying device is started and send a detected position information to the driver, and the driver is configured to selectively drive the wheel based on the position information to rotate to a calibration position where the one paddle is positioned at the cap supplying port to allow the cap to enter the first conveying rail from the first inlet, or allow the cap to be pushed to the second inlet by the one paddle.
[0008] In an embodiment, the position sensor is positioned outside the wheel and is configured to detect a position of one of the plurality of paddles on the outer circumference of the wheel, to determine a position of a paddle close to the first conveying rail among the plurality of paddles. When the paddle close to the first conveying rail among the plurality of paddles is not positioned at the cap supplying port, the wheel is driven to rotate to the calibration position.
[0009] In an embodiment, the driver is a servo motor.
[0010] In an embodiment, the rail distribution assembly further includes a position shifting device, and the position shifting device is configured to move the wheel away from the cap supplying port.
[0011] In an embodiment, the position shifting device includes a fixed base and a movable component movably connected to the fixed base, wherein the movable component includes a support member, and the wheel is rotatably supported on the support member.
[0012] The wheel is longitudinally arranged above the cap supplying port, and the movable component is configured to allow the wheel to move longitudinally to move away from or close to the cap supplying port. Alternatively, the wheel is transversely arranged on one side of the cap supplying port, and the movable component is configured to allow the wheel to move transversely to move away from or close to the cap supplying port.
[0013] In an embodiment, the cap supplying port outputs the caps in a first direction, and the first conveying rail includes a first side frame and a second side frame arranged opposite each other in a width direction, wherein the first side frame extends in the first direction and aligns the first inlet with the cap supplying port.
[0014] In an embodiment, the second conveying rail includes a connecting section and an extension section, wherein the connecting section is positioned between the second inlet and the extension section and is arranged at an angle to the first direction, and the extension section extends in a direction parallel to the first direction.
[0015] In an embodiment, the second conveying rail further includes a transition section connecting the connecting section and the extension section. The cap conveying device further includes a blowing device configured to blow gas from the outside of the second conveying rail towards the transition section.
[0016] Another aspect of the present disclosure is to provide a cap supplying system including the cap conveying device according to the present disclosure.
[0017] In an embodiment, the cap supplying system further includes a controller configured to selectively rotate the wheel to selectively convey a cap to the first conveying rail or the second conveying rail.
[0018] In an embodiment, the cap supplying system further includes a cap carrying part, wherein the cap carrying part includes a carrying disc configured to carry the cap to the cap supplying port, and the cap supply port is positioned in a tangential direction of the carrying disc.
[0019] In an embodiment, a plurality of clamps are arranged on the carrying disc in a circumferential direction, each of the clamps holds a cap, and the cap supplying system further includes a cap detection sensor configured to detect a position of the clamp holding the cap. When the cap detection sensor detects that the clamp holding the cap is aligned with the cap supplying port, the clamp holding the cap releases the cap to the cap supplying port.
[0020] The present disclosure provides an improved cap conveying device and cap supplying system. In the cap conveying device and the cap supplying system according to the present disclosure, a mechanical railing separating assembly is used, to quickly supply the cap to the corresponding conveying rail as needed, meeting the different requirements of the filling lines downstream and improving the efficiency of cap supplying. Moreover, in the cap conveying device and the cap supplying system according to the present disclosure, the position shifting device is used, to quickly move the wheel away from the cap supplying port when the cap jam occurs, to facilitate quick handling of the jam.BRIEF DESCRIPTION OF THE DRAWINGS
[0021] The embodiments of the present disclosure are described below only by way of example with reference to the accompanying drawings. In the accompanying drawings, the same features or components are represented by the same reference numerals, and the accompanying drawings are not necessarily drawn to scale. In the accompanying drawings:
[0022] Figure 1 shows a partial perspective view of a cap supplying system according to an embodiment of the disclosure;
[0023] Figure 2 is a view similar to Figure 1, in which a part of a cap conveying device of the cap supplying system in Figure 1 is not shown;
[0024] Figure 3 shows another partial perspective view of the cap supplying system according to the present disclosure; and
[0025] Figure 4 is an enlarged partial view of Figure 3. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0026] The following description is essentially only illustrative, rather than intending to limit the present disclosure and the application and usage thereof. It should be appreciated that, throughout all drawings, similar reference numerals indicate the same or similar parts or features. Each drawing only illustratively shows the concept and principle of the embodiments of the present disclosure, and does not necessarily show the specific dimensions and scales of various embodiments of the present disclosure. Specific parts in specific drawings may be exaggerated to illustrate related details or structures of the embodiments of the present disclosure.
[0027] In the description of the embodiments of the present disclosure, the orientation terms related to "upper” and "lower" , "left" and "right" used herein are described according to the upper and lower, left and right position relationships of the views shown in the accompanying drawings. In practical applications, the positional relationships of "upper" and "lower" , "left" and "right" used herein may be defined according to actual conditions, and these relationships may be reversed.
[0028] Figure 1 shows a partial perspective view of a cap supplying system 1 according to an embodiment of the present disclosure. As shown in Figure 1, the cap supplying system 1 includes a cap inlet 10, a cap carrying part, a cap conveying device, and a cap detection sensor 44. The cap carrying part includes a carrying disc 20, and is configured to convey a cap supplied from the cap inlet 10 to a detection station (not shown in the drawings) with the carrying disc 20, and convey the qualified cap to the cap conveying device. The cap supplying system 1 also includes a controller (not shown in the drawings) for controlling various parts of the cap supplying system 1.
[0029] The cap conveying device includes a cap supplying port, a first conveying rail 31, a second conveying rail 32, and a rail distribution assembly. The carrying disc 20 conveys the qualified caps to the cap supplying port, and the qualified caps are selectively supplied to the first conveying rail 31 and / or the second conveying rail 32 by the operation of the rail distribution assembly. The rail distribution assembly includes a wheel 41, a driver 42, a support member 43, a position sensor 45, and a position shifting device 46.
[0030] Figure 2 is a view similar to Figure 1, in which a part of the rail distribution assembly is hidden (the wheel 41 is not shown) to show the cap supplying port 33. The cap supplying port 33 is located in a tangential direction of the carrying disc 20. A direction (a first direction) in which the cap supplying port 33 outputs the cap is consistent with an extension direction of the first conveying rail 31. The first conveying rail 31 has a first inlet 310. As shown in Figures 1 and 2, the first inlet 310 faces the cap supplying port 33 and is adapted to receive the cap supplied from the cap supplying port 33. The first conveying rail 31 includes a first side frame 311 and a second side frame 312 arranged opposite to each other along a width direction. The first side frame 311 extends to the cap supplying port 33 in a direction corresponding to the direction (the first direction) in which the cap supplying port 33 outputs the cap, so that the first inlet 310 is aligned with the cap supplying port 33. The second conveying rail 32 is positioned on a side where the second side frame 312 is arranged, and has a second inlet 320. The second inlet 320 faces the cap supplying port 33 and is adapted to receive the cap supplied from the cap supplying port 33. As best shown in Figure 2, both the first inlet 310 and the second inlet 320 face the cap supplying port 33. In the conveying direction of the cap, the cap supplying port 33 is positioned upstream of the first inlet 310 and the second inlet 320, and at an intersection of the extension direction of the first inlet 310 and the extension direction of the second inlet 320.
[0031] Referring back to Figure 1, the wheel 41 is provided with a plurality of paddles 411 spaced apart from one another in a circumferential direction. The wheel 41 is arranged close to the cap supplying port 33, so that one of the plurality of paddles 411 may be positioned at the cap supplying port 33, that is, positioned upstream of the first inlet 310 of the first conveying rail 31, and the one paddle 411 is aligned with the first side frame 311 of the first conveying rail 31 to allow the cap to enter the first conveying rail 31 from the first inlet 310, or to allow the cap to be pushed by the one paddle to the second inlet 320. The plurality of paddles 411 of the wheel 41 are uniformly arranged on an outer circumference of the wheel 41. The space between adjacent two paddles 411 corresponds to an outer diameter of the cap to be conveyed or a width of the first conveying rail 31, and is equal to or slightly larger than the outer diameter of the cap or the width of the first conveying rail 31, to facilitate the cap to be stably conveyed through the gap between the adjacent two paddles 411 to the first conveying rail 31. The rail distribution assembly allows the cap to pass through the gap between one paddle 411 positioned at the cap supplying port 33 and aligned with the first side frame 311 of the first conveying rail 31 and an adjacent paddle to enter to the first conveying rail 31 from the first inlet 310 of the first conveying rail 31, or drives the wheel 41 to rotate to push the cap supplied to the cap supplying port 33 to the second inlet 320 of the second conveying rail 32 by the one paddle positioned at the cap supplying port 33 and aligned with the first side frame 311 of the first conveying rail 31.
[0032] The driver 42 is configured to drive the wheel 41 to rotate. In one example, the driver 42 is a servo motor. However, the present disclosure is not limited thereto. In other examples according to the present disclosure, the driver 42 may be any other suitable driving devices. The wheel 41 and the driver 42 are both supported by the support member 43. The wheel 41 is rotatably connected to the support member 43.
[0033] The position sensor 45 is used to perform zero position calibration of the cap conveying device and is configured to detect a rotational position of the wheel 41. The position sensor 45 is configured to detect the rotational position of the wheel 41 when the cap supplying system 1 is turned on, that is, when the cap conveying device is turned on, and send the detected position information to the driver 42. The driver 42 is configured to selectively drive the wheel 41 to rotate to a calibration position based on the position information. At the calibration position, one paddle 411 of the wheel 41 is position at the cap supplying port 33, and the one paddle 411 is aligned with the first side frame 311 of the first conveying rail 31, to allow the cap to enter the first conveying rail 31 from the first inlet 310 or allow the cap to be pushed by the one paddle 411 to the second inlet 320. The position sensor 45 is arranged outside the wheel 41 and is configured to detect the position of one of the plurality of paddles on the outer circumference of the wheel 41. As mentioned above, the plurality of paddles of the wheel 41 are uniformly arranged on the outer circumference of the wheel 41. Therefore, by detecting the position of one of the paddles, the positions of the other paddles may be determined. For example, the position of the paddle close to the first conveying rail 31 among the plurality of paddles may be determined. In the case that the wheel 41 is vertically arranged as shown in Figure 1, the paddle close to the first conveying rail 31 is a lower positioned paddle among the plurality of paddles of the wheel 41.
[0034] In the example shown in Figure 1, the position sensor 45 is installed outside the wheel 41 and is positioned above the wheel 41. The position sensor 45 is configured to detect the position of the upper positioned paddle of the wheel 41 when the cap supplying system 1 is turned on, to thereby determine the position of the lower positioned paddle close to the first conveying rail 31 among the plurality of paddles. However, the present disclosure is not limited thereto. The position sensor 45 may be installed at other suitable positions, as long as it is convenient to detect the position of the paddle of the wheel 41 close to the first conveying rail 31 and there is no interference to the operation of other devices. When the lower paddle close to the first conveying rail 31 is already at the cap supplying port 33, more specifically, when said paddle is aligned with the first side frame 311 of the first conveying rail 31 at the cap supplying port 33, it indicates that the wheel 41 is now in the calibration position, so there is no need to rotate the wheel 41. When the lower paddle close to the first conveying rail 31 is not at the cap supplying port 33 and is not aligned with the first side frame 311, it indicates that the wheel 41 is not in the calibration position, and in this case, the driver 42 drives the wheel 41 to rotate the wheel 41 to the calibration position. Only when the wheel 41 is in the calibration position, the cap conveying device starts to convey the cap to the first conveying rail 31 or the second conveying rail 32. The plurality of paddle 411 are uniformly arranged on the outer circumference of the wheel 41, and the wheel 41 is driven every time to rotate a step angle corresponding to the space between the adjacent paddles during the cap conveying. Therefore, once the wheel 41 is in the calibration position, even if the wheel 41 is driven to rotate to push the cap to the second inlet 320 of the second conveying rail 32 during the subsequent cap conveying process, another paddle of the rotated wheel 41 is positioned at the cap supplying port 33, and more specifically, is aligned with the first side frame 311 of the first conveying rail 31. Therefore, during the subsequent cap conveying process, there is no need to perform the above zero position calibration again. Therefore, the position sensor 45 performs the detection mentioned above only when the cap supplying system 1 is turned on.
[0035] Figure 3 shows a rotational position of the wheel 41, and Figure 4 shows a partially enlarged view of Figure 3. As shown in Figures 3 and 4, one paddle 411 of the wheel 41 is close to the cap supplying port 33 and is close to the first conveying rail 31, but is not aligned with the first side frame 311, is positioned between the first side frame 311 and the second side frame 312 of the first conveying rail 31 in a width direction of the first conveying rail 31, and is positioned in a conveying path in which the cap supplying port 33 outputs the cap. In this case, the paddle 411 will hinder the cap from being conveyed downstream to the first conveying rail 31 or the second conveying rail 32. When the position sensor 45 detects that the one paddle 411 is not aligned with the first side frame 311 of the first conveying rail 31 but is positioned between the first side frame 311 and the second side frame 312 in the width direction of the first conveying rail 31, it indicates that the wheel 41 is now not in the calibration position, and the one paddle will hinder the cap from being conveying downstream to the first conveying rail 31 or the second conveying rail 32. Therefore, the driver 42 drives the wheel 41 to rotate to the calibration position, so that the one paddle 411 is aligned with the first side frame 311 of the first conveying rail 31, so as to not hinder the cap from being conveying to the first conveying rail 31, and the one paddle 411 can push the cap to the second inlet 320 of the second conveying rail 32 as needed. For example, the wheel 41 may rotate in a clockwise direction in Figures 3 and 4 to align the paddle 411 indicated in Figures 3 and 4 with the first side frame 311. Alternatively, the wheel 41 may rotate in a counterclockwise direction in Figures 3 and 4 to align another paddle 411A indicated in Figure 4 near the paddle 411 with the first side frame 311. During zero position calibration, the rotation direction of the wheel 41 may be determined based on a distance in a width direction of the first conveying rail 31 from the paddle 411 of the wheel 41 to the first side frame 311 and the second side frame 312, so that zero position calibration may be completed by rotating the wheel 41 by a smaller angle.
[0036] The position shifting device 46 is configured to quickly move the wheel 41 away from the cap supplying port 33 when a cap jam occurs in the cap conveying device, in order to quickly handle the jam. Referring back to Figure 1, the position shifting device 46 includes a movable component 461 and a fixed base 462. The movable component 461 is fixedly connected to the support member 43 of the wheel 41 and is movably attached to the fixed base 462. The movable component 461 may move longitudinally relative to the fixed base 462, thereby leading the wheel 41 and the driver 42 thereof to move longitudinally. In the example shown in Figure 1, the movable component 461 and the fixed base 462 are movably connected to each other by means of a fitting structure of a sliding groove and a sliding rail. A sliding groove is arranged on one of the movable component 461 and the fixed base 462, and a sliding rail that fits the sliding groove is arranged at a corresponding position on the other of the movable component 461 and the fixed base 462, so that the movable component 461 may move relative to the fixed base 462. However, the present disclosure is not limited thereto. In other examples according to the present disclosure, the movable component 461 and the fixed base 462 may be movably connected to each other by means of other suitable fitting structures. In the example shown in Figure 1, the wheel 41 is longitudinally arranged above the cap supplying port 33, and the position shifting device 46 may move the wheel 41 longitudinally away from or close to the cap supplying port 33. However, the present disclosure is not limited thereto. In other examples according to the present disclosure, the wheel 41 may be transversely arranged on one side of the cap supplying port 33, and correspondingly, the position shifting device 46 may be configured to move the wheel 41 transversely away from or close to the cap supplying port 33.
[0037] Preferably, the cap conveying device may also be provided with a blowing device. A blowing tube 47 of the blowing device is configured to blow gas towards the second conveying rail 32 to accelerate conveying of the cap in the second conveying rail 32. As shown in Figure 2, and as best shown in Figure 3, the second conveying rail 32 includes a connecting section 321, an extension section 323 and a transition section 322. The connection section 321 is positioned between the second inlet 320 of the second conveying rail 32 and the transition section 322. In one example, the second inlet 320 of the second conveying rail 32 may be the inlet of the connecting section 321. In the example shown in the drawings, the direction (first direction) in which the cap supplying port 33 outputs the cap is consistent with the extension direction of the first conveying rail 31. The first side frame 311 extends in the first direction and aligns the first inlet 310 with the cap supplying port 33. The connecting section 321 of the second conveying rail 32 is arranged at an angle to the direction in which the cap supplying port 33 outputs the cap. The extension section 323 extends in a direction parallel to the direction (first direction) in which the cap supplying port 33 outputs the cap, that is, extends parallel to the first conveying rail 31. The transition section 322 is positioned between the connecting section 321 and the extension section 323, connecting the connecting section 321 to the extension section 323.
[0038] The blowing device is configured to blow gas from the outside of the second conveying rail 32 towards the transition section 322 of the second conveying rail 32 with a blowing pipe 47, so that after the cap is pushed to the second inlet 320 of the second conveying rail 32 and sent out from the connecting section 321, the cap is facilitated to be quickly conveyed to the extension section 323 of the second conveying rail 32. The blowing tube 47 is made of deformable material. Therefore, although it is shown in the drawings that the outlet of the blowing tube 47 does not face toward the transition section 322 of the second conveying rail 32, when in use, the blowing tube 47 may be bent so that the outlet of the blowing tube 47 faces toward the transition section 322 of the second conveying rail 32 to accelerate the conveying of the cap from the transition section 322 to the extension section 323.
[0039] Referring back to Figures 1 and 2, the cap detection sensor 44 is configured to detect a position of a clamp holding a cap. Specifically, the cap detection sensor 44 detects whether a clamp 21 holding a cap P is aligned with the cap supplying port 33. When a cap detection device 45 detects that the clamp 21 holding the cap P is aligned with the cap supplying port 33, the clamp 21 is controlled to release the cap P to the cap supplying port 33, and the cap P is selectively supplied to the first conveying rail 31 or the second conveying rail 32 by the operation of the rail distribution assembly. In the example shown in drawings, the cap detection sensor 44 is installed on a mounting rack above the carrying disc 20. However, the present disclosure is not limited thereto. In other examples according to the present disclosure, the cap detection sensor 44 may be installed at other suitable positions as long as it does not hinder the operation of other devices.
[0040] When the cap is required to be conveyed to the first conveying rail 31, the wheel 41 remains in the calibration position without rotating. That is, one lower positioned paddle 411 of the wheel 41 is aligned with the first side frame 311 of the first conveying rail 31, without hindering the cap from being supplied to the first conveying rail 31. Hence, under the guidance of the first side frame 311 of the first conveying rail 31, the cap P is conveyed through the gap between the paddle aligned with the first side frame 311 and the adjacent paddle to the first conveying rail 31 from the first inlet 310 of the first conveying rail 31.
[0041] When the cap is required to be conveyed to the second conveying rail 32, in the case that the clamp 21 releases the cap P to the cap supplying port 33, the driver 42 drives the wheel 41 to rotate by an angle, and the paddle of the wheel 41 pushes the cap P to the second inlet 320 of the second conveying rail 32. The cap P is then conveyed through the connecting section 321 and the transition section 322 to the extension section 323. The angle by which the wheel 41 rotates corresponds to an angle between the adjacent paddles 411. Therefore, after the wheel 41 rotates by the angle to push the cap P into the second inlet 320 of the second conveying rail 32, the next paddle 411 of the wheel 41 is aligned with the first side frame 311 of the first conveying rail 31 to prepare for the rail distribution operation of the next cap.
[0042] When the plurality of caps supplied from the carrying disc are required to be conveyed alternately to the first conveying rail 31 and the second conveying rail 32, the wheel 41 may be rotated and stopped at a predetermined cycle. The predetermined cycle may be determined based on a proportion of caps conveyed to the first conveying rail 31 to caps conveyed to the second conveying rail 32 and a conveying speed.
[0043] When a jam occurs near the cap supplying port 33 due to a cap aggregation, for example, when the caps in the second feeding rail 32 jam near the paddle 411, the position shifting device 46 may move the wheel 41 longitudinally upward, to move it away from the cap supplying port 33, to facilitate quick handling of the jam. After the jam is eliminated, the position shifting device 46 moves the wheel 41 longitudinally downward, to approach the cap supplying port 33 so as to continue the conveying of the caps.
[0044] The exemplary embodiments of the cap conveying device and the cap supplying system according to the present disclosure are shown above. In the cap conveying device and cap supplying system according to the present disclosure, a mechanical rail distribution assembly is used, to quickly supply the cap to the corresponding conveying rail as needed, meeting the different requirements of the filling lines downstream and improving the efficiency of cap supplying. In one example, the cap conveying device according to the present disclosure may operate at a cap supplying speed of 24000 pieces / hour. Moreover, in the cap conveying device and the cap supplying system according to the present disclosure, a position shifting device is used, to quickly move the wheel 41 away from the cap supplying port 33 when a cap jam occurs, so as to facilitate quick handling of the jam.
[0045] Here, the exemplary embodiments of the present disclosure have been described in detail, but it should be understood that the present disclosure is not limited to the specific embodiments described and illustrated in detail above. Those skilled in the art can make various modifications and variations to the present disclosure without departing from the spirit and scope of the present disclosure. All these modifications and variations fall within the scope of the present disclosure. Moreover, all components described here can be replaced by other technically equivalent components.
Claims
1.A cap conveying device, comprising:a cap supplying port; anda first conveying rail having a first inlet, wherein the first inlet faces the cap supplying port and is adapted to receive a cap supplied from the cap supplying port,characterized in that the cap conveying device further comprises:a second conveying rail having a second inlet, wherein the second inlet faces the cap supplying port and is adapted to receive a cap supplied from the cap supplying port; anda rail distribution assembly comprising a wheel arranged close to the cap supplying port, wherein the wheel is provided with a plurality of paddles spaced apart from one another in a circumferential direction, and one of the plurality of paddles can be positioned at the cap supplying port, the rail distribution assembly allows the cap to pass through a gap between the one paddle positioned at the cap supplying port and an adjacent paddle to enter the first conveying rail from the first inlet, or allows the wheel to be driven to rotate to push the cap to the second inlet by the one paddle.2.The cap conveying device according to claim 1, wherein the plurality of paddles are uniformly arranged on an outer circumference of the wheel, and the gap between the one paddle and the adjacent paddle corresponds to an outer diameter of the cap or a width of the first conveying rail.3.The cap conveying device according to claim 1 or 2, wherein the rail distribution assembly further comprises a driver and a position sensor, wherein the position sensor is configured to detect a rotational position of the wheel when the cap conveying device is started and send detected position information to the driver, and the driver is configured to selectively drive the wheel based on the position information to rotate to a calibration position where the one paddle is positioned at the cap supplying port to allow the cap to enter the first conveying rail from the first inlet, or allow the cap to be pushed to the second inlet by the one paddle.4.The cap conveying device according to claim 3, wherein the position sensor is positioned outside the wheel and is configured to detect a position of one of the plurality of paddles on an outer circumference of the wheel, to determine a position of a paddle close to the first conveying rail among the plurality of paddles; andwherein when the paddle close to the first conveying rail among the plurality of paddles is not positioned at the cap supplying port, the wheel is driven to rotate to the calibration position.5.The cap conveying device according to claim 3, wherein the driver is a servo motor.6.The cap conveying device according to claim 1, wherein the rail distribution assembly further comprises a position shifting device, and the position shifting device is configured to move the wheel away from the cap supplying port.7.The cap conveying device according to claim 6, wherein the position shifting device comprises:a fixed base, anda movable component movably connected to the fixed base, wherein the movable component comprises a support member, and the wheel is rotatably supported on the support member.8.The cap conveying device according to claim 7, wherein the wheel is longitudinally arranged above the cap supplying port, and the movable component is configured to allow the wheel to move longitudinally away from or close to the cap supplying port; orthe wheel is transversely arranged on one side of the cap supplying port, and the movable component is configured to allow the wheel to move transversely away from or close to the cap supplying port.9.The cap conveying device according to claim 1, wherein the cap supplying port outputs the cap in a first direction, and the first conveying rail comprises a first side frame and a second side frame arranged opposite each other in a width direction, wherein the first side frame extends in the first direction and aligns the first inlet with the cap supplying port.10.The cap conveying device according to claim 9, wherein the second conveying rail comprises a connecting section and an extension section, wherein the connecting section is positioned between the second inlet and the extension section and is arranged at an angle to the first direction, and the extension section extends in a direction parallel to the first direction.11.The cap conveying device according to claim 10, wherein the second conveying rail further comprises a transition section connecting the connecting section and the extension section; andwherein the cap conveying device further comprises a blowing device configured to blow gas from the outside of the second conveying rail towards the transition section.12.A cap supplying system characterized by comprising the cap conveying device according to any one of claims 1 to 11.13.The cap supplying system according to claim 12, wherein the cap supplying system further comprises a controller configured to selectively rotate the wheel to selectively convey a cap to the first conveying rail or the second conveying rail.14.The cap supplying system according to claim 12 or 13, wherein the cap supplying system further comprises a cap carrying part, wherein the cap carrying part comprises a carrying disc configured to carry the cap to the cap supplying port, and the cap supply port is positioned in a tangential direction of the carrying disc.15.The cap supplying system according to claim 14, wherein a plurality of clamps are arranged on the carrying disc in a circumferential direction, each of the clamps holds a cap, and the cap supplying system further comprises a cap detection sensor configured to detect a position of the clamp holding the cap; andwhen the cap detection sensor detects that the clamp holding the cap is aligned with the cap supplying port, the clamp holding the cap releases the cap to the cap supplying port.
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