Bobbin paper conveying device

Abstract

The invention belongs to the technical field of cigarette filter tip production, and particularly relates to a bobbin paper conveying device. The bobbin paper conveying device comprises a conveying assembly and a slip detection assembly. The conveying assembly comprises a conveying belt, the conveying belt is used for conveying bobbin paper, the slipping detection assembly comprises a first detector and a second detector, the first detector is used for detecting the speed of the conveying belt, and the second detector is used for detecting the speed of the bobbin paper. The slipping detection assembly can accurately measure the running linear speed of the conveying belt and the bobbin paper in real time, speed data are provided, it is ensured that the conveying device quickly responds to speed changes, and the conveying device can conveniently compare the speed of the conveying belt and the speed of the bobbin paper in real time to find slipping. By means of the device, the bobbin paper slipping phenomenon in the filter stick forming process can be rapidly corrected, equipment shutdown and material replacement caused by splicing failure or paper breaking are reduced, and the service life of the conveying belt is prolonged. Meanwhile, paper breakage caused by slipping, splicing failure or waste of bobbin paper, tows and glue caused by unqualified filter sticks are also reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of cigarette filter production, and particularly relates to a coil paper conveying device. Background Art

[0002] In the existing filter rod production process, the tow enters the filter rod lance through a high-pressure wire feeder and meets the paper coil at the lance entrance. After being wrapped by the paper coil, the tow is pulled by a cloth belt into the lance to form a filter rod. The high-speed movement of the filter rod within the lance is driven by the rotation of the cloth belt pulley. The entire transmission system consists of the cloth belt, cloth belt pulley guide wheel, and tensioning roller. In other words, the paper coil conveyor is a critical component of the filter rod forming system.

[0003] In existing paper coiling systems, the several tensioning blocks that form the transmission surface of the cloth pulley allow the transmission surface diameter to be adjusted within a small range. A tensioning roller tightens the block between the cloth belt and the pulley. A tensioning cylinder pushes the tensioning belt around the pulley, where it is then tightened by the tensioning roller, achieving stable, high-speed transmission. The key to stable, high-speed movement of the cloth belt pulling the filter rod is the driving force of the cloth pulley.

[0004] Slippage on the paper coil conveyor will seriously affect the normal operation of the cloth belt and paper coil, and then affect the quality of the filter rod, including:

[0005] 1. Filter rod molding quality defects. Slipping nylon tape can lead to uneven tow wrapping, resulting in inconsistent hardness, circumferential fluctuations, or extrusion deformation. Especially in paperless blow molding processes, slipping nylon tape can directly cause defects such as "bursts, flash, and large circumferences" in the filter rod. Slipping tape can cause loose tow wrapping, easily creating burrs during cutting and affecting the smoothness of the filter rod end face. Slipping paper coils can cause the forming paper to oscillate within the pipe channel, shifting the glue line, resulting in a loose seal or uneven glue distribution.

[0006] 2. Equipment malfunctions and reduced efficiency. Paper slippage can lead to splicing failures (e.g., inconsistent speeds between new and old paper) or paper breaks, forcing equipment downtime for material replacement and reducing production efficiency. Increased wear on belts and rollers: Slippage accelerates belt surface wear, shortening their service life. Furthermore, a reduced friction coefficient on the drive roller or idler further exacerbates slippage.

[0007] 3. Material waste and increased costs. Slippage-induced paper breaks, splicing failures, or substandard filter rods directly waste paper, tow, and glue. Frequent replacement of worn belts, drum liners, or brake components (such as friction pads) increases maintenance costs.

[0008] In other words, the slippage problem on the cloth pulley is an important factor restricting the production speed in the filter rod preparation process. Summary of the Invention

[0009] The purpose of the present invention is to improve the efficiency of conveying the paper coil for filter rod preparation. To solve this technical problem, the present invention adopts the following technical solutions:

[0010] A paper roll conveying device includes: a conveying component and a slip detection component;

[0011] The conveying assembly includes a conveyor belt, which is used to convey the paper roll;

[0012] The slip detection component includes a first detector and a second detector. The first detector is used to detect the speed of the conveyor belt, and the second detector is used to detect the speed of the paper roll.

[0013] Furthermore, the conveying assembly also includes a conveyor belt driving wheel and a conveyor belt driven wheel.

[0014] Furthermore, the conveyor belt is wound around a conveyor belt driving wheel and a conveyor belt driven wheel, and the conveyor belt driving wheel drives the conveyor belt to run.

[0015] Furthermore, the first detector is arranged on the conveyor belt driven wheel to detect the rotation speed of the conveyor belt driven wheel.

[0016] Furthermore, the conveying assembly also includes a paper coil guide wheel, which is used to guide the paper coil conveyed by the conveyor belt.

[0017] Furthermore, a second detector is provided on the paper guide wheel to detect the rotation speed of the conveyor belt driven wheel.

[0018] Furthermore, the slip detection component includes an encoder.

[0019] Furthermore, the paper feeding device further includes a controller, which is electrically connected to the first detector and the second detector.

[0020] Furthermore, the conveying assembly also includes a first tension regulator, which is electrically connected to the controller. When the speed of the conveyor belt detected by the first detector deviates from the speed of the paper roll detected by the second detector by more than an acceptable value, the controller provides a signal to the first tension regulator so that the first tension regulator adjusts the tension between the conveyor belt, the conveyor belt driving wheel and the conveyor belt driven wheel.

[0021] Furthermore, it also includes a first alarm, which is electrically connected to the controller. When the speed of the conveyor belt detected by the first detector deviates from the speed of the paper roll detected by the second detector by more than an acceptable value, the controller provides a signal to the first alarm to issue a first alarm signal.

[0022] Furthermore, the driving wheel includes a driving member, and the driving member drives the driving wheel to rotate.

[0023] Furthermore, the slip detection assembly includes a third detector, which is used to detect the rotational speed of the driving member.

[0024] Furthermore, the third detector is electrically connected to the controller and provides the rotation speed information of the driving member to the controller.

[0025] Furthermore, the conveying assembly also includes a second tension regulator; the second tension regulator is electrically connected to the controller, and when the speed of the conveyor belt detected by the first detector deviates from the speed of the driving member detected by the third detector by more than an acceptable value, the controller provides a signal to the second tension regulator so that the second tension regulator adjusts the tension between the conveyor belt, the conveyor belt driving wheel and the conveyor belt driven wheel.

[0026] Furthermore, the first tension adjuster and the second tension adjuster may be configured as one specific tension adjuster or more than two tension adjusters.

[0027] Furthermore, it also includes a second alarm, which is electrically connected to the controller. When the deviation between the speed of the conveyor belt detected by the first detector and the rotational speed of the driving member exceeds an acceptable value, the controller provides a signal to the second alarm to issue a second alarm signal.

[0028] Compared with the prior art, the beneficial effect of the present invention is that the vehicle speed of the filter rod forming process in the prior art is affected by the slippage phenomenon on the paper coil conveying device, and the slippage phenomenon is difficult for the operator to visually judge, resulting in the operator having to infer whether the paper coil conveying device in the filter rod forming machine is too fast or whether the tension is inappropriate based on the filter rod yield after producing a large number of filter rod products.

[0029] The present invention quickly identifies paper coil slippage during the filter rod forming process, allowing corrective measures to be taken. This improves yield, reduces trial-and-error costs, and reduces equipment downtime for material replacement due to splicing failures or paper breaks, extending the life of the conveyor belt. Furthermore, waste of paper coils, tow, and glue resulting from paper breaks, splicing failures, or unqualified filter rods caused by slippage is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The present invention will now be described with reference to the accompanying drawings, in which like reference numerals refer to like elements. Although the specific structure and arrangement discussed, it should be understood that this is done merely for illustrative purposes. Those skilled in the art will appreciate that other structures and arrangements can be used without departing from the spirit and scope of the present invention. It will be clear to those skilled in the art that the present invention can also be used for various other applications.

[0031] Figure 1 A three-dimensional schematic diagram of an embodiment of a paper roll conveying device;

[0032] Figure 2 for Figure 1 Exploded diagram of the driven pulley of the middle conveyor belt;

[0033] Figure 3 for Figure 1 Explosion diagram of the driven wheel of the middle paper reel;

[0034] Figure 4 for Figure 1 Explosion diagram of the first detector;

[0035] Figure 5 The figure is a circuit connection diagram of an embodiment of a paper roll conveying device.

[0036] Description of reference numerals:

[0037] 1: Slip detection component;

[0038] 11: first detector;

[0039] 12: second detector;

[0040] 13: detector bracket;

[0041] 131: first connecting plate;

[0042] 132: second connecting plate;

[0043] 2: Conveyor belt driven wheel;

[0044] 21: Mounting plate;

[0045] 22: transition axle;

[0046] 23: transition wheel;

[0047] 24: first bearing;

[0048] 25: Hexagon socket head screw;

[0049] 3: Paper guide wheel;

[0050] 31: base;

[0051] 32: axis;

[0052] 33: guide wheel;

[0053] 34: second bearing;

[0054] 35: Hexagon socket flat point set screw;

[0055] 4: Conveyor belt driving wheel;

[0056] 5: conveyor belt;

[0057] 6: Paper roll;

[0058] 7: Storage cartons. DETAILED DESCRIPTION

[0059] The detailed features and advantages of the present invention are described in detail below in the specific embodiments, and the content is sufficient to enable any person skilled in the art to understand the technical content of the present invention and implement it accordingly. Based on the description, claims and drawings disclosed in this specification, those skilled in the art can easily understand the relevant purposes and advantages of the present invention.

[0060] It should be noted that in this specification, similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0061] General Definition

[0062] In this specification and claims, reference will be made to various terms which, unless otherwise indicated, shall be defined to have the following meanings:

[0063] The term "include" or "have" has the same meaning as "contain" defined above, and also includes other forms of the term, such as the gerund form and the singular form in English, meaning including but not limited to, and is not intended to exclude, for example, other elements, components, integers or steps.

[0064] The singular forms "a" and "the" include the corresponding plural forms. "At least one" means one or more, and "plurality" means two or more. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, or c can mean: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or plural.

[0065] Unless otherwise stated, the term "speed" or "rotational speed" in the description of the embodiments of this specification generally refers to the linear speed of the outer periphery of the shaft or wheel.

[0066] All other terms used herein that are not specifically defined in this patent are intended to have the general meanings understood by ordinary technicians in the field to which they belong, and in particular, ordinary technicians in the field can directly and unambiguously determine the meaning of how to implement the technical solution of this patent after reading the claims, description and drawings of this patent.

[0067] Even if there are incomplete descriptions, omissions or ambiguities in the grammar, text, punctuation, graphics, symbols, etc. in the claims, description and drawings of this patent, ordinary technicians in this field can still reach the only correct understanding by reading the claims, description and drawings as a whole without excessive reasoning or experimentation, and effectively exclude various incorrect understandings that are not aimed at achieving the purpose of this patent.

[0068] Ordinary technical personnel in the relevant field will give priority to reading the patent claims, specifications and drawings to reasonably interpret the terms; secondly, they will choose to refer to the relevant definitions in other documents published by the applicant before the application date to reasonably interpret the terms; thirdly, they will choose to reasonably interpret the terms by referring to the references cited in this patent; finally, they will choose to reasonably interpret the terms by combining the technical dictionaries, technical manuals, reference books, textbooks, national or industry technical standards, etc. commonly used by technical personnel in the relevant technical field.

[0069] In the following embodiments, the hardware names and purchasing manufacturers are shown in Table 1:

[0070] Table 1 Name of manufacturing equipment or experimental equipment and purchasing manufacturer

[0071]

[0072] Please refer to Figures 1 to 5 The figure shows a paper roll conveying device, including: a conveying component and a slip detection component 1; the conveying component includes a conveyor belt 5, which is used to convey the paper roll 6; the slip detection component 1 includes a first detector 11 and a second detector 12, the first detector 11 is used to detect the linear speed of the conveyor belt 5, and the second detector 12 is used to detect the linear speed of the paper roll 6.

[0073] The paper roll conveyor device of the present invention includes a slip detection assembly 1 that accurately measures the linear speed of the conveyor belt 5 and paper roll 6 in real time, providing speed data to ensure the conveyor device's rapid response to speed changes. This allows the conveyor device to compare the speeds of the conveyor belt 5 and paper roll 6 in real time and promptly detect speed deviations. By setting a speed deviation threshold, the conveyor device automatically issues an alarm when the deviation exceeds the set value, prompting the operator to make timely adjustments and avoid production problems caused by speed mismatches. Through real-time monitoring and automatic adjustment, the system can quickly respond to speed deviations and tension changes, reducing downtime caused by manual adjustments.

[0074] Specifically, the paper coil conveying device includes a slip detection component 1, a conveyor belt driven wheel 2, a paper coil guide wheel 3, a conveyor belt driving wheel 4 and a conveyor belt 5.

[0075] The slippage detection assembly includes a first detector 11 and a second detector 12. The first detector 11 and the second detector 12 are both mounted on the frame of the paper feeding device via a detector bracket 13.

[0076] More specifically, both the first detector 11 and the second detector 12 are photoelectric rotary encoders. Rotary encoders are devices used to measure rotational speed. Through photoelectric conversion, photoelectric rotary encoders convert mechanical quantities such as the angular displacement and angular velocity of the output shaft into corresponding electrical pulses and output them as digital signals. In this embodiment, the photoelectric rotary encoders mounted on the conveyor belt driven pulley 2 and the paper winding guide pulley 3 can measure the angular velocities of the conveyor belt driven pulley 2 and the paper winding guide pulley 3. Because the diameters of the conveyor belt driven pulley 2 and the paper winding guide pulley 3 are customizable, the controller can easily calculate the linear velocities of the conveyor belt driven pulley 2 and the paper winding guide pulley 3 based on the angular velocities.

[0077] Advantageously, the detector preferably uses a photoelectric rotary encoder, which reduces mechanical wear on the detector itself and external interference with the conveyor belt or paper roll, thereby improving measurement stability and reliability. Furthermore, the encoder requires minimal modification to the paper roll conveyor mechanism in existing filter rod forming equipment.

[0078] For example, both the first detector 11 and the second detector 12 include a Beckhoff incremental encoder (quadruple frequency, 5000 rpm*4) and a KL5101 encoder module. The encoder monitors the speed and position of the driven shaft. The KL5101, with a 1 MHz acquisition frequency, converts the encoder signal into a digital value, creating an encoder axis. If slippage occurs, an alarm is triggered if the response time is less than 100 ms. Through multi-dimensional verification, the false alarm rate has been reduced to 0.3%. Predictive maintenance can easily detect belt slippage with simple cleaning.

[0079] Specifically, if Figure 2 The conveyor belt driven pulley 2 includes a mounting plate 21, a transition pulley shaft 22, a transition pulley 23, a first bearing 24, and a hexagon socket head screw 25. The first detector 11 is sleeved and mounted on the conveyor belt driven pulley 2. The transition pulley 23 is mounted on the transition pulley shaft 22. First bearings 24 are mounted on the front and rear of the transition pulley shaft 22 to facilitate rotation of the transition pulley 23. The transition pulley shaft 22 is fixed to the mounting plate 21 via hexagon socket head screws 25. The mounting plate 21 is also fixed to the upper portion of the forming frame below the smoke gun via hexagon socket head screws 25. The detector bracket 13 is fixed to the forming frame to secure the second detector 12.

[0080] Specifically, if Figure 3The paper guide roller 3 comprises a base 31, a shaft 32, a guide roller 33, a second bearing 34, and a hexagon socket set screw 35. The second detector 12 is sleeved and mounted on the guide roller 33, which is mounted on the shaft 32. Second bearings 34 are mounted on the front and rear of the shaft 32 to facilitate the rotation of the guide roller 33. The shaft 32 is fixed to the base 31 via hexagon socket set screws 35. The base 31 is fixed to the lower part of the forming machine frame, near the right side of the static paper splice, via hexagon socket set screws 35. The detector bracket 13 is fixed to the forming machine frame to secure the second detector 12.

[0081] More specifically, if Figure 4 The first detector 11 is bolted to the second connecting plate 132, which is folded in an S-shape and bolted to the first connecting plate 131. The encoder is a hollow cylindrical structure, mounted through the conveyor belt driven pulley 2. The encoder monitors the speed of the conveyor belt driven pulley 2 as it rotates. The second detector 12 is similarly mounted on the paper winding guide pulley 3.

[0082] Specifically, the paper roll conveying device further includes a controller electrically connected to the first detector and the second detector. The conveying assembly further includes a tension regulator (not shown); the tension regulator is electrically connected to the controller. When the speed of the conveyor belt 5 detected by the first detector 11 deviates from the speed of the paper roll detected by the second detector 12 by more than an acceptable value, or when the speed of the conveyor belt detected by the first detector deviates from the speed of the driving pulley detected by the third detector by more than an acceptable value, the controller provides a signal to the tension regulator to cause the tension regulator to adjust the tension between the conveyor belt 5, the driving pulley 4, and the driven pulley 2. It will be readily understood that those skilled in the art are familiar with how to specifically connect the circuitry between the tension regulator and the controller.

[0083] Advantageously, the tension regulator can automatically adjust the tension between the conveyor belt, the conveyor belt driving wheel and the conveyor belt driven wheel when the conveyor belt slips on its driving wheel or driven wheel until the belt speed of the conveyor belt matches the driving wheel speed.

[0084] It should be noted that tension adjusters are well-known to those skilled in the art. Existing paper-spooling devices typically include automatic or manual tension adjustment mechanisms. A tension adjuster encompasses any structure capable of adjusting the tension of the conveyor belt or paper-spool. For example, it includes a motor in a transmission relationship with the paper-spool, i.e., the motor driving the conveyor belt drive pulley 4. Increasing or decreasing the speed of this motor causes the tension of the paper-spool to change, and this can also be considered a tension adjuster. The tension adjuster also includes a tension roller for tension adjustment. Those skilled in the art are familiar with the arrangement and use of such a tension roller. For example, the tension roller is mounted on an adjustable support member adjacent to at least one exposed end of the drive pulley.

[0085] It is easy to understand that those skilled in the art are familiar with how to determine the calculated speed deviation and how to determine whether the speed deviation exceeds an acceptable value, for example, by performing four arithmetic operations using a built-in algorithm of the controller.

[0086] Preferably, the paper roll conveying device also includes a first alarm, which is electrically connected to the controller. When the speed of the conveyor belt detected by the first detector deviates from the speed of the paper roll detected by the second detector by more than an acceptable value, the controller provides a signal to the first alarm to issue a first alarm signal.

[0087] Advantageously, after receiving the first alarm signal, the operator can know that the conveyor belt and the paper roll are slipping, and can take corresponding actions familiar to technicians in this field, such as replacing the driving wheel body, the driven wheel body or the cloth belt, or adjusting the process parameters.

[0088] Specifically, the driving wheel includes a driver that drives the driving wheel. The driver is electrically connected to a controller and provides the controller with information about the driver's speed. The driver includes a motor and a driver. The motor drives the conveyor belt driving wheel 4, providing power to the conveyor belt 5 and paper roll 6. The driver monitors the motor's speed and position and is electrically connected to the controller. It will be readily understood that those skilled in the art are familiar with the specific circuit connections between the driver and the controller.

[0089] Furthermore, this embodiment includes a second alarm device electrically connected to the controller. When the deviation between the conveyor belt speed detected by the first detector and the driving member speed exceeds an acceptable value, the controller provides a signal to the second alarm device to issue a second alarm signal. For example, the driving pulley body, the driven pulley body, or the cloth belt can be replaced, or process parameters can be adjusted.

[0090] It is easy to understand that those skilled in the art are familiar with how to specifically connect the circuit between the alarm and the controller.

[0091] Advantageously, after receiving the second alarm signal, the operator can know that the conveyor belt and the driving wheel are slipping, and can take corresponding actions well known to those skilled in the art, such as adjusting process parameters.

[0092] More specifically, the electrical connections between the first detector 11, the second detector 12, the driving wheel motor, the controller, the tension regulator, the first alarm, and the second alarm are via an EtherCAT communication network. It will be readily understood that those skilled in the art are familiar with how to configure an EtherCAT communication network and how to connect and control electrical units using an EtherCAT communication network.

[0093] For example, the filter rod forming device further includes a paper storage box 7 located behind the paper roll guide wheel 3 and used to store paper rolls 6. When paper rolls 6 need to be replaced, an operator performs a paper stacking operation, and the paper rolls 6 in the paper storage box 7 are quickly filled and ready for use. It will be readily understood that those skilled in the art are familiar with how to replace paper rolls.

[0094] The description of the embodiments of this specification refers to Marks' Standard Handbook for Mechanical Engineers, compiled by Marks et al. and published by McGraw-Hill, Inc. (11th edition and other versions before the filing date of this application); DeGarmo's Materials and Processes in Manufacturing, compiled by DeGarmo et al. and published by Wiley (13th edition and other versions before the filing date of this application); Machinery's Handbook, compiled by Oberg et al. and published by Industrial Press Inc. (32nd edition and other versions before the filing date of this application); Mechanical Design Handbook, edited by Cheng Daxian and published by Chemical Industry Press (6th edition and other versions before the filing date of this application); Modern Mechanical Design Handbook, edited by Wen Bangchun and published by Machinery Industry Press (6th edition and other versions before the filing date of this application).

[0095] Throughout this specification, references to "one embodiment" or "an embodiment" mean that a particular feature, structure, or characteristic described in connection with that embodiment / embodiment is included in at least one embodiment / embodiment of the present invention. Thus, appearances of the phrase "in one embodiment / embodiment" in various places throughout this specification do not necessarily refer to the same embodiment / arrangement, but rather may refer to multiple embodiments / arrangements. Furthermore, particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments / arrangements, as would be apparent to one of ordinary skill in the art from this disclosure.

[0096] Similarly, it should be understood that in the above description of exemplary embodiments / embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment / embodiment or its drawings and description for the purpose of simplifying the disclosure and aiding understanding of one or more of the various inventive aspects. However, except for expressly stated contrary guidance or obvious technical contradiction or exclusion, the description method of this patent should not be interpreted as reflecting an intention that the claimed invention requires more features than expressly stated in each claim. Instead, the claims reflect that the inventive aspects lie in less than all features of a single aforementioned disclosed embodiment / embodiment. Therefore, the claims that follow the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment / embodiment of the invention.

[0097] Furthermore, while some embodiments / implementations described herein include but do not include certain features included in other embodiments / implementations, combinations of features from different embodiments / implementations are intended to be within the scope of the present invention and to form different embodiments / implementations, as will be understood by those skilled in the art. For example, in the claims below, any claimed embodiment / implementation can be used in any combination.

Claims

1. A paper conveying device, characterized in that: include: Conveying components and slip detection components; The conveying assembly includes a conveyor belt, and the conveyor belt is used to convey the paper roll; The slippage detection assembly includes a first detector and a second detector, wherein the first detector is used to detect the conveyor belt speed, and the second detector is used to detect the paper roll speed.

2. The paper feeding device according to claim 1, wherein: The conveying assembly further includes a conveyor belt driving wheel and a conveyor belt driven wheel; The conveyor belt is wound around the conveyor belt driving wheel and the conveyor belt driven wheel, and the conveyor belt driving wheel drives the conveyor belt to run; The first detector is arranged on the conveyor belt driven wheel to detect the rotation speed of the conveyor belt driven wheel.

3. The paper conveying device according to claim 2, wherein: The conveying assembly further includes a paper coil guide wheel, which is used to guide the paper coil conveyed by the conveyor belt; The second detector is arranged on the paper guide wheel to detect the rotation speed of the conveyor belt driven wheel.

4. The paper feeding device according to claim 2, wherein: The system further includes a controller electrically connected to the first detector and the second detector.

5. The paper conveying device according to claim 4, characterized in that: The conveying assembly also includes a first tension regulator; the first tension regulator is electrically connected to the controller, and when the speed of the conveyor belt detected by the first detector deviates from the speed of the paper roll detected by the second detector by more than an acceptable value, the controller provides a signal to the first tension regulator so that the first tension regulator adjusts the tension between the conveyor belt, the conveyor belt driving wheel and the conveyor belt driven wheel.

6. The paper feeding device according to claim 4, wherein: It also includes a first alarm, which is electrically connected to the controller. When the speed of the conveyor belt detected by the first detector deviates from the speed of the paper roll detected by the second detector by more than an acceptable value, the controller provides a signal to the first alarm to issue a first alarm signal.

7. The paper feeding device according to claim 4, characterized in that: The driving wheel includes a driving member, and the driving member drives the driving wheel to rotate; the slip detection component includes a third detector; The third detector is used to detect the rotation speed of the driving member; The third detector is electrically connected to the controller and provides the rotation speed information of the driving member to the controller.

8. The paper feeding device according to claim 7, characterized in that: The conveying assembly also includes a second tension regulator; the second tension regulator is electrically connected to the controller, and when the speed of the conveyor belt detected by the first detector deviates from the speed of the driving member detected by the third detector by more than an acceptable value, the controller provides a signal to the second tension regulator so that the second tension regulator adjusts the tension between the conveyor belt, the conveyor belt driving wheel and the conveyor belt driven wheel.

9. The paper feeding device according to claim 7, characterized in that: It also includes a second alarm, which is electrically connected to the controller. When the deviation between the speed of the conveyor belt detected by the first detector and the rotational speed of the conveyor drive exceeds an acceptable value, the controller provides a signal to the second alarm to issue a second alarm signal.

10. The paper feeding device according to claim 1, wherein: The slip detection assembly includes an encoder.

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