A conveying system for a paper process sheet oven and a paper process sheet oven

Abstract

The patent relates to the technical field of tobacco, and particularly relates to a conveying system for a paper-process sheet drying oven and the paper-process sheet drying oven. The conveying system comprises a conveying device, a first deviation rectifying device and a second deviation rectifying device. The first deviation rectifying device and the second deviation rectifying device are both used to provide displacement in a deviation rectifying direction to the conveying belt, the deviation rectifying direction is perpendicular to the length direction of the conveying belt, the distance between the first deviation rectifying device and the end driving roller is not greater than 10%, 20% or 25% of the length direction size of the transmission assembly, and the second deviation rectifying device is arranged substantially symmetrically to the middle line of the transmission assembly in the length direction of the first deviation rectifying device. The patent can better solve the deviation problem of the conveying belt, save labor cost, improve production efficiency and reduce the labor intensity of the operator. The deviation rectifying frequency of the first deviation rectifying device and the second deviation rectifying device is lower during the working process, and the first deviation rectifying device and the second deviation rectifying device are more suitable for deviation rectifying of long-distance belt conveying systems and have a longer service life.

Description

Technical Field

[0001] This patent belongs to the field of tobacco technology, specifically relating to a conveying system and a papermaking sheet drying oven. Background Technology

[0002] Papermaking sheet production lines primarily produce reconstituted tobacco leaf (sheet) products. This production line involves processes such as extraction, pulping, refining, concentration, sizing, coating, and drying of tobacco raw materials. The drying process requires the use of a papermaking sheet drying oven. This oven is typically a tunnel-type structure with an internal conveyor belt that moves the sheets within the oven for drying. During this movement, the conveyor belt may shift due to various reasons; if this shift is not corrected in time, it can cause damage to the conveyor belt.

[0003] To ensure the stable operation of the oven, a conveyor belt correction device was designed at the beginning of the equipment manufacturing process to ensure that the conveyor belt can be corrected immediately when it is displaced.

[0004] Currently, conveyor belt alignment in papermaking sheet drying ovens primarily relies on sensors located in the middle of the conveyor system combined with cylinders or airbags for alignment. While this keeps the conveyor belt operating within a normal range, limitations in cylinder or airbag alignment methods and the installation positions of the alignment device and sensors necessitate frequent alignment actions, causing frequent conveyor belt movement. Frequent lateral alignment forces on the conveyor belt reduce its lifespan. Simultaneously, the alignment rollers experience uneven stress due to the frequent reaction forces from the conveyor belt, further impacting their lifespan and increasing the likelihood of bearing damage.

[0005] In summary, in order to better solve the above problems and improve the service life of conveyor belts and correction rollers, how to provide a correction device suitable for the conveyor belt of a papermaking sheet drying oven is a technical problem that urgently needs to be solved in the tobacco technology field. Utility Model Content

[0006] The purpose of this patent is to improve the belt alignment effect of a papermaking sheet drying oven. To solve this technical problem, the first aspect of this patent provides a conveying system for a papermaking sheet drying oven, including a conveying device, a first alignment device, and a second alignment device. The conveying device includes a conveyor belt and a transmission assembly. The conveyor belt is wound around and tensioned on the transmission assembly. The transmission assembly includes a drive roller and a driven roller. The drive roller is used to move the conveyor belt in the conveying direction. The drive roller includes an end drive roller located at the end of the transmission assembly. Both the first and second correction devices are used to provide displacement in the correction direction to the conveyor belt, and the correction direction is perpendicular to the length direction of the conveyor belt; the distance between the first correction device and the end drive roller is not greater than 10%, 20% or 25% of the length dimension of the transmission assembly; the second correction device and the first correction device are set basically symmetrically with respect to the centerline of the length direction of the transmission assembly.

[0007] Furthermore, the end of the transmission assembly furthest from the end driving roller is the end driven roller, and the distance between the second correction device and the end driven roller is less than 10%, 20%, or 25% of the length dimension of the transmission assembly.

[0008] Furthermore, the first correction device and / or the second correction device include an automatic correction device, which includes a correction component and a sensing component.

[0009] Furthermore, the sensing component is electrically connected to the correction component to detect the position of the conveyor belt in the correction direction and to transmit the detection signal to the correction component so that the correction component corrects the conveyor belt.

[0010] Furthermore, the sensing component includes a first sensor and a second sensor. The first sensor is used to cause the correction component to provide a first displacement to the conveyor belt when the conveyor belt reaches a first offset position. The second sensor is used to cause the correction component to provide a second displacement to the conveyor belt when the conveyor belt reaches a second offset position. The distance between the first offset position and the conveyor belt is greater than the distance between the second offset position and the conveyor belt, and the second displacement is greater than the first displacement.

[0011] Furthermore, the sensing component also includes a third sensor, which is used to cause the correction component to provide a third displacement to the conveyor belt when the conveyor belt reaches the third offset position; the distance between the third offset position and the conveyor belt is greater than the distance between the second offset position and the conveyor belt, and the third displacement is greater than the second displacement.

[0012] Furthermore, the sensing components include photoelectric sensors.

[0013] Furthermore, the correction component is located on one side of the conveyor belt.

[0014] Furthermore, the alignment component includes a motor, a worm gear, a slider, a slide rail, and an alignment roller.

[0015] Furthermore, the motor is used to drive the worm to rotate forward and backward. The slider is connected to the worm and slides back and forth on the worm as it rotates forward and backward. The slider is connected to one end of the correction roller, and the other end of the correction roller is fixedly set relative to the papermaking sheet drying oven. The surface of the correction roller is in contact with the conveyor belt, and the correction roller provides different displacements to the conveyor belt when it swings.

[0016] Furthermore, the correction assembly also includes a slide rail, which is fixedly disposed relative to the papermaking sheet drying oven. The slide rail is connected to the slider so that the slider can only slide parallel to the length direction of the worm.

[0017] Furthermore, it also includes a controller, which is electrically connected to the first and second correction devices.

[0018] The second aspect of this patent provides a papermaking sheet drying oven, including the aforementioned transfer system for the papermaking sheet drying oven.

[0019] Compared to existing technologies, the beneficial effects of this patent are as follows: 1. The conveyor system for a papermaking sheet drying oven provided by this patent can effectively solve the problem of conveyor belt misalignment, save labor costs, improve production efficiency, and reduce the labor intensity of operators. Furthermore, compared with the prior art, the first and second correction devices in the conveyor system for a papermaking sheet drying oven operate at lower frequencies, making them more suitable for correction in long-distance belt conveyor systems and extending their service life.

[0020] 2. To ensure the moisture content of papermaking sheets meets standards and to prevent the loss of their aroma compounds, they require low-temperature, long-duration drying. Papermaking sheet drying ovens typically have long conveyor belts. The applicant found that conveyor belt misalignment in papermaking sheet drying ovens is mainly caused by the mismatch between the working state of the end drive roller and the state of the papermaking sheets on the conveyor belt. Therefore, installing a first correction device near the end drive roller to correct the conveyor belt misalignment is quite effective. Simultaneously, the positional deviation caused by the end drive roller reaches its maximum on the side of the transmission assembly furthest from the end drive roller. Therefore, installing a second correction device that is substantially symmetrical to the first correction device relative to the centerline of the transmission assembly's length direction to correct the conveyor belt misalignment is quite effective.

[0021] 3. In this patent, it is preferable to set each sensor assembly as a group consisting of two, three or more sensors, which is beneficial to more accurately know the degree of deviation of the conveyor belt, so that the correction assembly can more accurately correct the conveyor belt, further reduce the working frequency of the correction device, and extend the working life of the transmission system.

[0022] The paper-making sheet referred to in this patent is a type of tobacco sheet. The paper-making reconstituted tobacco sheet uses tobacco materials or tobacco waste from cigarette manufacturing processes, such as tobacco dust, stems, tobacco leaf fragments, and some low-grade tobacco leaves, as raw materials. After soaking in water, solid-liquid separation is performed to separate the water-soluble and insoluble substances in the tobacco. The insoluble substances are pulped and then processed into fiber substrate using a papermaking machine, while the water-soluble substances are concentrated, reduced, and added to the substrate. Finally, after drying, the paper-making sheet is obtained. On the one hand, the paper-making sheet maximizes the utilization of tobacco raw materials, saving on cigarette costs. On the other hand, the paper-making sheet plays an important role in reducing the release of tar from cigarettes and thus reducing the harm of cigarettes.

[0023] Existing methods for producing tobacco sheets mainly include the slurry process and the papermaking process. The papermaking method, which produces tobacco sheets, is entirely different from the slurry method. Its physical and filling properties are far superior, effectively reducing tar and harmful substances in cigarette smoke, and it plays an increasingly important role in cigarette formulation. Because the papermaking process for reconstituted tobacco fully utilizes mature technologies and equipment from the papermaking industry, it has unparalleled advantages in production capacity compared to other reconstituted tobacco types such as the roll pressing and slurry processes. Through continuous and efficient material processing, large-scale production is achieved. Based on the different physicochemical performance requirements of the papermaking reconstituted tobacco products, significant adjustments can be made to the extraction, pulping, and papermaking processes to achieve quality control over the product's physical properties, thereby meeting the industrial processing performance needs of cigarette manufacturers.

[0024] The typical preparation method for tobacco sheets using the papermaking process involves the following steps: First, tobacco materials (tobacco stems, tobacco leaf fragments) are extracted by soaking in hot water. A solid-liquid separation step separates the water-soluble tobacco components from the insoluble components such as tobacco fibers. The resulting fibers are formed into sheet bases on a paper machine. The water-soluble components are then concentrated by distillation to obtain a tobacco concentrate. This concentrate is then impregnated or sprayed onto the sheet base, and finally dried to form tobacco sheets. In the process of manufacturing tobacco sheets using the papermaking method, traditional techniques have been adapted from papermaking methods. Attached Figure Description

[0025] The above content of this patent and the following detailed embodiments will be better understood when read in conjunction with the accompanying drawings. It should be noted that the drawings are merely examples of the claimed technical solution.

[0026] Figure 1 This is a schematic diagram of an embodiment of the present utility model; Figure 2 for Figure 1 Enlarged view of point A in the middle; Figure 3 for Figure 1 Enlarged view of point B in the middle; Figure 4 for Figure 1 A three-dimensional schematic diagram of the center correction device; Figure 5 for Figure 1 A three-dimensional schematic diagram of the mid-track correction device from another perspective; Figure 6 for Figure 1 A top view of the center correction device; Figure 7 This is a schematic diagram of the installation of the correction device in the papermaking sheet drying oven of this utility model.

[0027] In the picture: 1000: First correction device; 1010: Electric motor; 1020: Coupling; 1030: Worm gear; 1040: Slider; 1050: Correction side bearing; 1060: Correction side bearing housing; 1070: First limit switch; 1080: Second limit switch; 1100: Slide rail; 1110: Fixed side bearing housing; 1120: First straightening roller; 1130: Fixed-side bearing; 1140: Fixed-side sensing assembly; 1141: First fixed-side sensor; 1142: Second fixed-side sensor; 1143: Third fixed-side sensor; 1150: Correction side sensing component; 1151: First correction side sensor; 1152: Second correction side sensor; 1153: Third correction side sensor; 2000: Transmission device; 2010: End drive roller; 2020: First return roller; 2030: Second return roller; 2040: Guide roller; 2050: Oven crossbeam; 2060: Support rod; 2070: Connector; 2080: Conveyor belt; 2090: Second drive roller; 2100: End passive roller; 3000: Second correction device; 3120: Second correction roller; 3140: Second fixed-side sensing assembly; 3141: Fourth fixed-side sensor; 3142: Fifth fixed-side sensor; 3143: Sixth fixed-side sensor; 3150: Second correction side sensor assembly; 3151: Fourth correction side sensor; 3152: Fifth correction side sensor; 3153: Sixth correction side sensor. Detailed Implementation

[0028] The detailed features and advantages of this patent are described below in the specific embodiments. The content is sufficient to enable any person skilled in the art to understand the technical content of this patent and implement it accordingly. Based on the specification, claims and drawings disclosed in this specification, a person skilled in the art can easily understand the related objectives and advantages of this patent.

[0029] It should be noted that in this specification, similar reference numerals and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0030] refer to Figures 1-6 This patent provides a specific embodiment of a transport system for a papermaking sheet drying oven, which transports dried papermaking sheets in the papermaking sheet drying oven.

[0031] The conveying system for a papermaking sheet drying oven includes a conveying device 2000, a first correction device 1000, and a second correction device 3000. The conveying device includes a conveyor belt 2080 and a transmission assembly. The conveyor belt 2080 is wound around and tensioned on the transmission assembly, which includes a drive roller and a driven roller. The drive roller is used to move the conveyor belt 2080 in the conveying direction and includes an end drive roller 2010 located at the end of the transmission assembly. Both the first correction device 1000 and the second correction device 3000 provide displacement to the conveyor belt 2080 in the correction direction, which is perpendicular to the length direction of the conveyor belt 2080. The distance between the first correction device 1000 and the end drive roller 2010 is 8% to 10% of the length dimension of the transmission assembly. The second correction device 3000 and the first correction device 1000 are arranged substantially symmetrically with respect to the centerline of the length direction of the transmission assembly.

[0032] The conveyor system for a papermaking sheet drying oven provided by this patent effectively solves the problem of conveyor belt 2080 deviation, saves labor costs, improves production efficiency, and reduces the labor intensity of operators. Furthermore, compared to existing technologies, the first correction device 1000 and the second correction device 3000 in this conveyor system for a papermaking sheet drying oven operate at a lower correction frequency, making them more suitable for long-distance belt conveyor systems and extending their service life.

[0033] In other embodiments, the distance between the first correction device 1000 and the end drive roller 2010 can also be no greater than 10%, 15%, 20%, 25% of the length dimension of the transmission assembly, or any value between them. Advantageously, positioning the correction device 1000 near the end drive roller 2010 enables more efficient correction of the conveyor belt 2080. In the papermaking sheet drying oven, the misalignment of the conveyor belt 2080 is mainly caused by the mismatch between the working state of the end drive roller 2010 and the state of the papermaking sheet on the conveyor belt 2080. Therefore, positioning the first correction device 1000 near the end drive roller 2010 to correct the conveyor belt 2080 is more effective.

[0034] To ensure that the moisture content of the papermaking sheet meets the standard and to avoid the loss of its aroma substances, it needs to be dried at low temperature for a long time. The papermaking sheet drying oven usually has a long conveyor belt. The positional deviation generated by the end drive roller 2010 will reach its maximum on the other side of the transmission component away from the end drive roller 2010. Therefore, it is more effective to set up a second correction device 3000 that is basically symmetrical with the center line of the transmission component in the length direction relative to the first correction device 1000 to correct the conveyor belt 2080.

[0035] In this embodiment, the end of the transmission assembly away from the end drive roller 2010 is the end passive roller 2100. The conveyor belt 2080, which winds around the end drive roller 2010 and the end passive roller 2100 from the upper side, is used to receive the papermaking sheet to be dried. The conveyor belt 2080, which winds around the end drive roller 2010 and the end passive roller 2100 from the lower side, is tensioned and guided by the transmission assembly.

[0036] The transmission components specifically include a first return roller 2020, a second return roller 2030, and a guide roller 2040. It is understood that the first return roller 2020, second return roller 2030, guide roller 2040, and other transmission components are for tensioning the long conveyor belt 2080 and maintaining the positional stability of the conveyor belt 2080; this patent is not limited to this. This embodiment also includes a second drive roller 2090 for supplementing power. The second drive roller 2090 is located near the center of the transmission components, essentially between the first correction device 1000 and the second correction device 3000. Due to the symmetrical arrangement of the first correction device 1000 and the second correction device 3000, this transmission system can also efficiently correct positional deviations of the conveyor belt 2080 caused by the second drive roller 2090.

[0037] The distance between the second correction device 3000 and the end passive roller 2100 is no greater than 10%, 20%, or 25% of the length dimension of the transmission assembly. Advantageously, the second correction device 3000 positioned at these locations can better compensate for the correction effect of the first correction device 1000, resulting in more efficient correction of the conveyor belt 2080.

[0038] The first correction device 1000 and the second correction device 3000 have the same structure, both including an automatic correction device. The following description primarily uses the first correction device 1000 as an example to illustrate the specific implementation of this patent. The automatic correction device includes a correction component and a sensing component. The sensing component is electrically connected to the correction component and is used to detect the position of the conveyor belt 2080 in the correction direction, and to transmit the detection signal to the correction component so that the correction component corrects the conveyor belt 2080.

[0039] A web guiding assembly is disposed on one side of the conveyor belt 2080. The web guiding assembly includes a motor 1010, a worm gear 1030, a slider 1040, a slide rail 1100, and a first web guiding roller 1120. The motor 1010 drives the worm gear 1030 to rotate in both directions. The slider 1040 is connected to the worm gear 1030 and slides back and forth on the worm gear 1030 as it rotates in both directions. The slider 1040 is connected to one end of the first web guiding roller 1120. The other end of the first web guiding roller 1120 is fixedly disposed relative to the papermaking sheet drying oven. The surface of the first web guiding roller 1120 is in contact with the conveyor belt 2080. When the first web guiding roller 1120 swings at different angles, it combines with the movement of the conveyor belt 2080 to generate a component force in the web guiding direction, providing different displacements to the conveyor belt 2080. Therefore, controlling the forward and reverse rotation time of motor 1010 controls the swing amplitude of the first correction roller 1120, and controls the degree of correction of the conveyor belt 2080 by the automatic correction device. For the conveyor belt 2080, the side on which the first correction roller 1120 moves is the correction side, and the side on which the first correction roller 1120 is fixed is the fixed side.

[0040] The correction assembly also includes a slide rail 1100, which is fixedly disposed relative to the papermaking sheet drying oven. The slide rail 1100 is connected to a slider 1040 so that the slider 1040 can only slide parallel to the length direction of the worm gear 1030.

[0041] To ensure transmission effectiveness, the correction assembly motor 1010 is also connected to the worm gear 1030 via a coupling 1020. Furthermore, the first correction roller 1120 has a correction-side bearing housing 1060 on its correction side, and a correction-side bearing 1050 is housed within the correction-side bearing housing 1060. The first correction roller 1120 is connected to the inner ring of the correction-side bearing 1050, and the correction-side bearing housing 1060 is fixedly connected to the slider 1040. Similarly, the first correction roller 1120 has a fixed-side bearing housing 1110 on its fixed side, and a fixed-side bearing 1130 is housed within the fixed-side bearing housing 1110. The first correction roller 1120 is connected to the inner ring of the fixed-side bearing 1130, and the fixed-side bearing housing 1110 is fixedly mounted in the papermaking sheet drying oven.

[0042] The sensing assembly includes a first sensor and a second sensor. The first sensor causes the correction assembly to provide a first displacement to the conveyor belt when the conveyor belt reaches a first offset position. The second sensor causes the correction assembly to provide a second displacement to the conveyor belt when the conveyor belt reaches a second offset position. The distance between the first offset position and the conveyor belt is greater than the distance between the second offset position and the conveyor belt, and the second displacement is greater than the first displacement. The sensing assembly also includes a third sensor. The third sensor causes the correction assembly to provide a third displacement to the conveyor belt when the conveyor belt reaches a third offset position. The distance between the third offset position and the conveyor belt is greater than the distance between the second offset position and the conveyor belt, and the third displacement is greater than the second displacement.

[0043] Preferably, the fixed side of the first correction device 1000 is provided with a fixed-side sensing component 1140, which includes a first fixed-side sensor 1141, a second fixed-side sensor 1142, and a third fixed-side sensor 1143. The correction side is provided with a correction-side sensing component 1150, which includes a first correction-side sensor 1151, a second correction-side sensor 1152, and a third correction-side sensor 1153. The fixed-side sensing component 1140 and the correction-side sensing component 1150 are electrically connected to a controller to control the first correction device 1000 and the second correction device 3000, and to control the forward and reverse rotation of the motors in the first correction device 1000 and the second correction device 3000. The first fixed-side sensor 1141, the second fixed-side sensor 1142, the third fixed-side sensor 1143, the first correction-side sensor 1151, the second correction-side sensor 1152, and the third correction-side sensor 1153 are all photoelectric sensors. When the conveyor belt 2080 reaches below a certain sensor, the sensor will generate a signal to the controller.

[0044] Advantageously, configuring each sensor group to consist of two, three, or more sensors allows for more accurate determination of the conveyor belt 2080's offset, enabling the correction component to more accurately correct the conveyor belt 2080, further reducing the operating frequency of the correction device and extending the lifespan of the transmission system. Compared to proximity sensors and other sensors that utilize magnetic effects to sense object positions, photoelectric sensors can operate better within the papermaking sheet drying oven.

[0045] Similarly, the fixed side of the second correction device 3000 is provided with a second fixed-side sensing component 3140, which includes a fourth fixed-side sensor 3141, a fifth fixed-side sensor 3142, and a sixth fixed-side sensor 3143. The correction side is provided with a second correction-side sensing component 3150, which also includes a fourth correction-side sensor 3151, a fifth correction-side sensor 3152, and a sixth correction-side sensor 3153. The second fixed-side sensing component 3140 and the second correction-side sensing component 3150 are electrically connected to a controller to control the first correction device 1000 and the second correction device 3000, and to control the forward and reverse rotation of the motors in the first correction device 1000 and the second correction device 3000. The fourth fixed-side sensor 3141, the fifth fixed-side sensor 3142, the sixth fixed-side sensor 3143, the fourth correction-side sensor 3151, the fifth correction-side sensor 3152, and the sixth correction-side sensor 3153 are all photoelectric sensors. When the conveyor belt 2080 reaches below a certain sensor, the sensor will generate a signal to the controller.

[0046] The second correction device 3000 also includes a second correction roller 3120.

[0047] For example, the table below shows that when the conveyor belt 2080 deviates to the fixed side, the corresponding sensor will activate the corresponding correction roller after receiving a signal.

[0048] Table 1. Working Modes of the Correction Device

[0049] 1. The table above shows the shift of the conveyor belt towards the fixed side of the correction roller. Once a signal is detected at the corresponding detection point, the corresponding correction roller will activate. 2. "√" indicates a signal detected, and "×" indicates no signal detected. 3. When the correction roller detects the corresponding signal, it will quickly shift to the corresponding distance, as shown in the table above. 4. As the correction device operates, the conveyor belt gradually returns to the correct position, and the correction roller also gradually returns to its original position. For example, when the first correction side sensor, the second correction side sensor, and the third correction side sensor detect a signal, the first correction roller moves 3.5cm to the left. As correction progresses, if the first correction side sensor and the second correction side sensor detect a signal but the third correction side sensor does not, the first correction roller will move 1cm to the right, returning to the 2.5cm position. If the first correction side sensor detects a signal but the second and third correction side sensors do not, the first correction side sensor will move another 1cm to the right, returning to the 1.5cm position. When the first correction side sensor, the second correction side sensor, and the third correction side sensor all do not have a signal, the first correction roller returns to its original position.

[0050] It is understood that those skilled in the art are familiar with how to implement the above process using well-known circuits and control methods.

[0051] like Figure 7 This patent also provides an embodiment of a papermaking sheet drying oven, including the above-described embodiment of a transmission system for a papermaking sheet drying oven. The sensor assembly is installed as follows... Figure 7 As shown, the papermaking sheet drying oven includes a crossbeam 2050, a support rod 2060 fixedly connected to the lower side of the crossbeam 2050, and a connector 2070 sleeved on the support rod 2060. The connector 2070 is used to install sensor assemblies such as a first fixed-side sensor 1141, a second fixed-side sensor 1142, and a third fixed-side sensor 1143. It is readily understood that other sensors involved in the foregoing embodiments are also installed using the same method.

[0052] The description in this specification references Marks' Standard Handbook for Mechanical Engineers (11th edition and other editions prior to the filing date of this application), published by McGraw-Hill, Inc.; DeGarmo's Materials and Processes in Manufacturing (13th edition and other editions prior to the filing date of this application), published by Wiley; Machinery's Handbook (32nd edition and other editions prior to the filing date of this application), published by Industrial Press Inc.; Mechanical Design Handbook (6th edition and other editions prior to the filing date of this application), edited by Cheng Daxian, published by Chemical Industry Press; and Modern Mechanical Design Handbook (6th edition and other editions prior to the filing date of this application), edited by Wen Bangchun, published by Machinery Industry Press.

[0053] In this specification, references to "an embodiment" or "a specific implementation" mean that a particular feature, structure, or characteristic described in connection with that embodiment / specific implementation is included in at least one embodiment / specific implementation of the invention. Therefore, the phrase "in one embodiment / specific implementation" appearing in various places in this specification does not necessarily refer to the same embodiment / setting, but rather to potentially different embodiments. Furthermore, specific features, structures, or characteristics may be combined in one or more embodiments / settings in any suitable manner, as will be apparent to those skilled in the art from this disclosure.

[0054] Similarly, it should be understood that in the above description of exemplary embodiments / specific implementations of the invention, various features of the invention are sometimes combined in a single embodiment / specific implementation or its figures and description, with the aim of simplifying the disclosure and aiding in the understanding of one or more of the various aspects of the invention. However, the method of description in this patent should not be construed as reflecting an intention that the claimed features of the invention are more than those expressly stated in each claim, except where explicitly stated otherwise or in obvious technical contradiction or exclusion. Rather, the inventive aspect reflected in the claims lies in not all the features of a single foregoing disclosed embodiment / specific implementation. Therefore, the claims following the detailed description are expressly incorporated herein by reference, each claim existing independently as a separate embodiment / specific implementation of the invention.

[0055] Furthermore, while some embodiments / specific implementations described herein include, but are not limited to, other features included in other embodiments / specific implementations, combinations of features from different embodiments / specific implementations are intended to be within the scope of the invention and form different embodiments / specific implementations, as will be understood by those skilled in the art. For example, in the claims, any embodiment / specific implementation of any claim can be used in any combination.

Claims

1. A conveying system for a papermaking sheet drying oven, characterized in that, Includes a transmission device, a first correction device, and a second correction device; The transmission device includes: a transmission belt and a transmission assembly; the transmission belt is wound around and tensioned on the transmission assembly, the transmission assembly includes a drive roller and a driven roller, the drive roller is used to move the transmission belt in the conveying direction, and the drive roller includes an end drive roller located at the end of the transmission assembly; Both the first and second correction devices are used to provide displacement in the correction direction to the conveyor belt, and the correction direction is perpendicular to the length direction of the conveyor belt. The distance between the first correction device and the end drive roller is no greater than 10%, 20%, or 25% of the length dimension of the transmission assembly; The second correction device and the first correction device are arranged substantially symmetrically with respect to the centerline of the transmission component in the length direction.

2. The conveying system for a papermaking sheet drying oven according to claim 1, characterized in that, The end of the transmission assembly furthest from the end driving roller is the end driven roller, and the distance between the second correction device and the end driven roller is less than 10%, 20%, or 25% of the length dimension of the transmission assembly.

3. The conveying system for a papermaking sheet drying oven according to claim 1, characterized in that, The first correction device and / or the second correction device include an automatic correction device; The automatic correction device includes a correction component and a sensing component; The sensing component is electrically connected to the correction component and is used to detect the position of the conveyor belt in the correction direction, and to transmit the detection signal to the correction component so that the correction component corrects the conveyor belt.

4. The conveying system for a papermaking sheet drying oven according to claim 3, characterized in that, The sensing component includes a first sensor and a second sensor. The first sensor is used to cause the correction component to provide a first displacement to the conveyor belt when the conveyor belt reaches a first offset position. The second sensor is used to cause the correction component to provide a second displacement to the conveyor belt when the conveyor belt reaches the second offset position; the distance between the first offset position and the conveyor belt is greater than the distance between the second offset position and the conveyor belt, and the second displacement is greater than the first displacement.

5. The conveying system for a papermaking sheet drying oven according to claim 4, characterized in that, The sensing component further includes a third sensor, which is used to cause the correction component to provide a third displacement to the conveyor belt when the conveyor belt reaches the third offset position; the distance between the third offset position and the conveyor belt is greater than the distance between the second offset position and the conveyor belt, and the third displacement is greater than the second displacement.

6. The conveying system for a papermaking sheet drying oven according to claim 4, characterized in that, The sensing component includes a photoelectric sensor.

7. The conveying system for a papermaking sheet drying oven according to claim 4, characterized in that, The correction component is disposed on one side of the conveyor belt; The correction assembly includes a motor, a worm gear, a slider, and a correction roller; The motor drives the worm gear to rotate in both directions. The slider is connected to the worm gear and slides back and forth on the worm gear as it rotates in both directions. The slider is connected to one end of the straightening roller. The other end of the straightening roller is fixedly set relative to the papermaking sheet drying oven. The surface of the straightening roller is in contact with the conveyor belt. When the straightening roller swings, it provides different displacements to the conveyor belt.

8. The conveying system for a papermaking sheet drying oven according to claim 7, characterized in that, The correction assembly also includes a slide rail, which is fixedly disposed relative to the papermaking sheet drying oven. The slide rail is connected to the slider so that the slider can only slide parallel to the length direction of the worm gear.

9. The conveying system for a papermaking sheet drying oven according to claim 1, characterized in that, It also includes a controller, which is electrically connected to the first correction device and the second correction device.

10. A paper-making sheet drying oven, characterized in that, Includes the transfer system for a papermaking sheet drying oven as described in any one of claims 1 to 9.

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