Conveyor belt structure capable of rectifying deviation

Abstract

The invention discloses a conveyor belt structure capable of rectifying deviation, which is characterized in that a telescopic end of a telescopic power source is designed to be connected with a driving ring of which the inner diameter is larger than the outer diameter of a movable end, and the movable end is movably sleeved with the driving ring, so that the movable end can adaptively incline and slide in the driving ring under the condition that the position of a fixed end is fixed and only can rotate; the problem that the linear motion of the telescopic power source conflicts with the arc motion required by the movable end can be solved; deviation rectification on the two sides is achieved through the two deviation rectification mechanisms, deviation rectification through further tensioning of the belt is avoided, and the running stability of the conveying belt can be guaranteed; the deviation rectifying mechanism achieves dynamic deviation rectifying through cooperation of a roller type travel switch and electromagnetic valve control, the labor amount of workers can be reduced, and stability and reliability are achieved.

Description

Technical Field

[0001] The present invention belongs to the technical field of correcting conveyor belts in conveying operations, and particularly relates to a conveyor belt structure capable of rectifying deviation. Background Art

[0002] In glass manufacturing, a roller coater is an important device for strengthening glass substrates. The conveyor belt of the roller coater is a key component for conveying glass substrates, and the stability of its operation directly affects the product quality. The conveyor belt of the roller coater mainly includes a frame, a power source, a driving roller, a driven roller and a belt. The driving roller and the driven roller are horizontally spaced apart and rotatably arranged on the frame. The belt is looped outside the driving roller and the driven roller. The power source drives the driving roller to rotate, and then drives the belt to rotate cyclically through friction. When the roller coater is running, the belt is prone to deviation due to the inclination of the driving roller and the driven roller or the adhesion of debris on the inner side of the belt. The deviation of the belt will not only accelerate its own wear and reduce its service life, but also cause the movement trajectory of the conveyed glass substrate to deviate, thereby affecting the coating quality of the glass substrate.

[0003] To timely correct the belt with signs of deviation and make it return to normal rotation, and avoid affecting production due to the continuous deviation of the belt, it is necessary to install a deviation rectifying mechanism on the conveyor belt. Chinese Patent Application CN119038020A discloses a belt conveyor and a part conveying system. Refer to the appendix of this patent Figure 2 、 3With respect to Solutions 3 and 4, the deviation rectifying mechanism of this solution is to provide a deviation rectifying roller with a changing outer diameter taper on one side of the belt. When deviation occurs, the driving part drives the deviation rectifying roller to extend into the inner side of the belt and abut against its inner peripheral wall, so that the deviation rectifying roller applies a force opposite to the belt deviation direction to the belt, thereby achieving deviation rectification. This solution not only has a complex structure, but also the extension and retraction of the deviation rectifying roller itself may drive the belt to deviate, resulting in poor practicability. Chinese Patent CN221115558U discloses a deviation rectifying conveyor belt mechanism in automatic coating. The deviation rectifying mechanism of this solution includes a pressing roller. One end of the pressing roller is hinged to the frame, and the other end is provided with a driving part. The driving part realizes deviation rectification by driving the pressing roller to swing. In contrast, this structural form is simpler and more reliable. However, to drive the pressing roller to swing, the driving part needs to drive the pressing roller to move radially and also enable the pressing roller to adaptively move axially along with the radial movement. For this reason, this patent designs a translation mechanism as shown in paragraphs [0047 - 0048] of its specification and Figures 8 and 9 as the driving part. Specifically, the translation mechanism includes a nut driven by a lead screw. A wrapping block is movably assembled on the nut. The wrapping block has a freedom of rotation around a vertical axis. The wrapping block also has a through hole for the central axis of one side of the pressing roller to pass through. As the nut translates, the pressing roller swings with one side shaft end of itself as the center of a circle. The central axis of the pressing roller adaptively enters and exits the through hole, and the wrapping block also rotates adaptively. It can be seen that in order to drive the pressing roller to swing and enable the pressing roller to adaptively move axially to achieve the swing of the pressing roller, the deviation rectifying mechanism of this solution is not simple when it comes to the translation mechanism as the driving part. Therefore, in order to more simply and effectively achieve the deviation rectification of the conveyor belt, it is necessary to optimize the design or improvement of the deviation rectifying mechanism. Summary of the Invention

[0004] Aiming at the above deficiencies of the prior art, the purpose of the present invention is to provide a conveyor belt structure capable of deviation rectification, solve the technical problem that the existing conveyor belt deviation rectifying mechanism is relatively complex, and achieve the effects of simplifying the deviation rectifying mechanism and improving practicability.

[0005] To solve the above technical problems, the present invention adopts the following technical solutions: A conveyor belt structure capable of deviation rectification includes a conveyor belt and a deviation rectifying mechanism; the conveyor belt includes a frame and a belt. There are two rotatable and parallelly spaced transmission rollers on the frame, and the belt is tensioned and looped outside the two transmission rollers; the deviation rectifying mechanism includes a deviation rectifying roller arranged along the width direction of the conveyor belt on the inner or outer side of the belt. The outer circumferential surface of one side of the deviation rectifying roller abuts against the belt. The two ends of the deviation rectifying roller respectively extend to form a fixed end and a movable end. The fixed end is rotatably connected to the frame and can make the deviation rectifying roller rotate closer to and away from the belt. The movable end is provided with a driving part. The driving part includes a telescopic power source fixed on the frame. The telescopic end of the telescopic power source is connected with a driving ring. The inner diameter of the driving ring is larger than the outer diameter of the movable end. The movable end movably passes through the driving ring. The telescopic power source can drive the deviation rectifying roller to rotate closer to and away from the belt through the driving ring and the movable end.

[0006] Furthermore, there are two deviation rectifying mechanisms which are arranged at intervals along the length direction of the conveyor belt, and the fixed ends of the deviation rectifying rollers in the two deviation rectifying mechanisms are respectively located on both sides of the conveyor belt in the width direction.

[0007] Furthermore, the deviation rectifying mechanism further includes a position sensor and a control element. The control element is electrically connected to the position sensor and the telescopic power source respectively. The position sensor is arranged on one side of the conveyor belt in the width direction and is used to detect the deviation of the belt. The control element controls the telescopic power source to execute a single deviation rectifying stroke according to the trigger signal of the position sensor.

[0008] Furthermore, the telescopic power source adopts a pull rod cylinder, the position sensor adopts a travel switch, and the control element adopts a solenoid valve. The solenoid valve is connected to the pull rod cylinder through an air circuit to control the telescopic action of the pull rod cylinder by switching the air circuit.

[0009] Furthermore, the position sensor adopts a roller type travel switch. The roller type travel switch is arranged on the side where the movable end is located. The roller of the roller type travel switch is close to the belt. The axial direction of the roller corresponds to the telescopic direction of the pull rod cylinder. A synchronously rotating roller is sleeved on the roller, and the outer circumferential surface of the roller is used to abut against the edge of the belt instead of the roller. The axial dimension of the roller is larger than the axial dimension of the roller.

[0010] Furthermore, a deviation rectifying mandrel that can rotate relatively coaxially is arranged inside the deviation rectifying roller. Both ends of the deviation rectifying mandrel serve as the fixed end and the movable end, and a lubricating layer is arranged between the deviation rectifying mandrel and the deviation rectifying roller.

[0011] Furthermore, the fixed end is connected with a spherical plain bearing. The machine frame is provided with a dowel pin arranged along the length direction of the conveyor belt and adapted to the spherical plain bearing. The dowel pin passes through the shaft hole of the spherical plain bearing, and the spherical plain bearing allows the deviation rectifying roller to swing in the vertical plane.

[0012] Furthermore, the movable end movably passes through the driving ring and is threadedly connected with an anti - detachment nut. There is a distance between the anti - detachment nut and the driving ring, and the distance between the anti - detachment nut and the driving ring is 2 mm - 5 mm.

[0013] Furthermore, the deviation rectifying roller is located inside the belt. Tensioning rollers are arranged along the width direction of the conveyor belt on the outer side of the belt. The outer circumferential surface of the tensioning roller abuts against the outer side surface of the belt. The machine frame is provided with a tensioning adjustment mechanism for driving the tensioning roller to approach and move away from the outer side surface of the belt.

[0014] Furthermore, there are two tensioning adjustment mechanisms which are respectively located at both ends of the tensioning roller. The tensioning adjustment mechanism includes a slide rail, a slider and a screw lifting assembly. The slide rail is arranged vertically and connected to the machine frame. The slider is correspondingly connected to the end of the tensioning roller and is slidably matched with the slide rail. The screw lifting assembly includes an adjustment bolt threadedly connected to the machine frame. The upper end of the bolt abuts against the bottom surface of the slider to push the slider to slide along the slide rail by rotating the adjustment bolt, so as to realize the vertical displacement adjustment of the tensioning roller.

[0015] The present invention further includes a belt deviation rectification control method, which is based on the belt structure capable of deviation rectification as described above and includes the following steps: 1) The travel switch detects the deviation amount of the belt towards the side where the adjacent movable end is located. When the deviation amount exceeds the preset deviation rectification value, the travel switch is triggered and a control signal is sent to the solenoid valve; 2) After receiving the control signal, the solenoid valve switches the gas path to make the pull rod cylinder drive the movable end away from the belt, and the belt deviates and resets towards the side where the fixed end is located; 3) The travel switch resets as the conveyor belt deviates and resets. After the travel switch resets, a control signal is sent to the solenoid valve; 4) After receiving the control signal, the solenoid valve switches the gas path to make the pull rod cylinder drive the movable end close to the belt and reset; 5) Steps 1) to 4) are repeatedly executed to achieve dynamic deviation rectification.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. For the belt structure capable of deviation rectification of the present invention, the telescopic end of the telescopic power source is designed to be connected to a driving ring with an inner diameter larger than the outer diameter of the movable end. The driving ring is movably sleeved outside the movable end, so that when the position of the fixed end is fixed and only rotatable, the movable end can adaptively tilt and slide inside the driving ring, thereby overcoming the conflict between the linear movement of the telescopic power source and the required arc movement of the movable end; the driving part of the present invention realizes the rotational swing of the deviation rectification roller through the cooperation of the telescopic power source and the driving ring, with a simple and effective structure, solves the problem that the existing belt deviation rectification mechanism is relatively complex, and has good practicability.

[0017] 2. For the belt structure capable of deviation rectification of the present invention, two deviation rectification mechanisms are respectively used for deviation rectification on both sides, avoiding deviation rectification by further tensioning the belt, thereby ensuring the stability of the belt operation and being beneficial to improving the reliability and practicability of the belt structure.

[0018] 3. For the belt structure capable of deviation rectification of the present invention, a roller is sleeved on the roller of the roller type travel switch, expanding the size of the working surface of the roller type travel switch that is pushed and triggered in the axial direction of the roller, ensuring that the roller type travel switch can also be triggered by the belt being pushed even when the position of the belt floats in the axial direction of the roller, which is beneficial to improving the reliability of the belt structure. Description of the Drawings

[0019] Figure 1 It is the perspective view A of the belt structure capable of deviation rectification described in the embodiment; Figure 2 It is the perspective view B of the belt structure capable of deviation rectification described in the embodiment; Figure 3 ForFigure 1 Enlarged schematic view at position C in Figure 4 is Figure 1 Enlarged schematic view at position D in Figure 5 is Figure 2 Enlarged schematic view at position E in Figure 6 is Figure 2 Enlarged schematic view at position F in Among them, the frame 1, the belt 2, the driving roller 3, the deviation rectifying roller 4, the telescopic power source 5, the driving ring 6, the position sensor 7, the control element 8, the pull rod cylinder 9, the travel switch 10, the solenoid valve 11, the roller 12, the deviation rectifying mandrel 13, the spherical plain bearing 14, the dowel pin 15, the anti-loosening nut 16, the tensioning roller 17, the chute plate 18, the connecting block 19, the adjusting bolt 20, the tensioning mandrel 21. Specific embodiments

[0020] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0021] Embodiment: Please refer to Figure 1 and Figure 2 , a conveyer belt structure capable of rectifying deviation, comprising a conveyer belt and a deviation rectifying mechanism; the conveyer belt comprises a frame 1 and a belt 2, and two rotatable and parallelly spaced driving rollers 3 are arranged on the frame 1, and the belt 2 is tensioned and looped outside the two driving rollers 3; the deviation rectifying mechanism comprises a deviation rectifying roller 4 arranged along the width direction of the conveyer belt on the inner or outer side of the belt 2, and the outer circumferential surface of one side of the deviation rectifying roller 4 abuts against the belt 2; specifically, one of the two driving rollers 3 is a driving roller and the other is a driven roller, and the belt 2 tensioned and looped outside the two driving rollers 3 always has two parallel belt sections, and the outer circumferential surface of one side of the deviation rectifying roller 4 abuts against the belt 2, that is, the deviation rectifying roller 4 only abuts against one belt section, and it can be understood that the other belt section is used for carrying the articles to be conveyed to avoid the influence on the conveying of articles by the conveyer belt when the deviation rectifying roller 4 swings for rectifying deviation; please refer to Figure 1 and Figure 3 , both ends of the deviation rectifying roller 4 respectively extend to form a fixed end and a movable end, the fixed end is rotatably connected to the frame 1 and can make the deviation rectifying roller 4 rotate closer to and away from the belt 2, the movable end is provided with a driving part, the driving part comprises a telescopic power source 5 fixed on the frame 1, the telescopic end of the telescopic power source 5 is connected with a driving ring 6, the inner diameter of the driving ring 6 is larger than the outer diameter of the movable end, the movable end movably passes through the driving ring 6, and the telescopic power source 5 can drive the deviation rectifying roller 4 to rotate closer to and away from the belt 2 through the driving ring 6 and the movable end.

[0022] For the belt conveyor structure capable of rectifying deviation in the present invention, a deviation rectifying roller 4 with one end fixed in position and the other end movable is arranged on a frame 1, and a driving part is provided to make the deviation rectifying roller 4 perform a rotational swing with the fixed end as the base point. The movable end of the deviation rectifying roller 4 moves away from or approaches the belt 2 along with the swing, so that the acting forces of each part of the deviation rectifying roller 4 in contact with the belt 2 change, and further the tension degrees of each part of the belt 2 in the width direction are different. The position of the belt 2 with a greater tension degree has a greater frictional force with the driving roller 3, and the side of the belt 2 with a greater frictional force with the driving roller 3 has a faster speed, thereby realizing the deviation of the belt 2 in the expected direction and completing the deviation rectification; a telescopic power source 5 is arranged in the driving part to provide the power acting on the movable end and making the deviation rectifying roller 4 perform a rotational swing with the fixed end as the base point. Since the telescopic movement of the telescopic power source 5 is a linear movement, while when the deviation rectifying roller 4 performs a rotational swing with the fixed end as the base point, the movement locus of the movable end is an arc, and the linear locus of the telescopic movement of the telescopic power source 5 cannot match the arc locus required for the movement of the movable end; for this reason, the present invention designs that the telescopic end of the telescopic power source 5 is connected to a driving ring 6 with an inner diameter larger than the outer diameter of the movable end, and the driving ring 6 is movably sleeved outside the movable end. When the telescopic power source 5 drives the movable end to perform a linear movement through the driving ring 6, since there is a certain gap between the movable end and the inner wall of one side of the driving ring 6, the movable end can perform self-adaptive inclination and sliding in the driving ring 6 under the condition that the fixed end is fixed in position and can only rotate, thereby overcoming the problem of the conflict between the linear movement of the telescopic power source 5 and the arc movement required for the movable end; the driving part of the present invention realizes the rotational swing of the deviation rectifying roller 4 through the cooperation of the telescopic power source 5 and the driving ring 6, and the structure is simple and effective, solves the problem that the existing belt conveyor deviation rectifying mechanism is relatively complex, and has good practicability.

[0023] When the belt conveyor operates normally, the belt 2 is in a certain tension state. A deviation rectifying mechanism is arranged. In the initial state, the deviation rectifying roller 4 is horizontally arranged and the frictional forces of each part with the belt 2 are balanced. When the driving part makes the movable end move away from the belt 2, the position of the deviation rectifying roller 4 close to the fixed end has a greater frictional force with the belt 2, and the belt 2 deviates towards the side where the fixed end is located. When the driving part makes the movable end approach (continue to push) the belt 2, the position of the deviation rectifying roller 4 close to the movable end has a greater frictional force with the belt 2, and the belt 2 deviates towards the side where the movable end is located. In this way, although one deviation rectifying mechanism can realize deviation rectification on both sides, when the driving part makes the movable end approach (continue to push) the belt 2, the belt 2 may be overly tensioned, and there is a possibility of consequences such as cracking and accelerated wear; please refer to Figure 1 and Figure 2, to this end, in order to improve the reliability and practicality of the conveyor belt structure and avoid rectifying the deviation by further tensioning the belt 2, in this embodiment, two deviation rectifying mechanisms are arranged at intervals along the length direction of the conveyor belt. The interval between the two deviation rectifying mechanisms is 1 / 3 - 1 / 2 of the length of the conveyor belt. The fixed ends of the deviation rectifying rollers 4 in the two deviation rectifying mechanisms are respectively located on both sides of the conveyor belt in the width direction, that is, the fixed end of the deviation rectifying roller 4 in one deviation rectifying mechanism and the movable end of the deviation rectifying roller 4 in the other deviation rectifying mechanism are located on the same side of the conveyor belt in the width direction. In this way, the movable ends of the two deviation rectifying rollers 4 are far away from the belt 2 respectively to realize deviation rectification on both sides. Specifically, when the belt 2 deflects to one side, the deviation rectifying mechanism with the fixed end located on the opposite side acts, and its driving part makes the movable end far away from the belt 2, and the belt 2 deflects towards the side where the fixed end is located, so as to realize deviation rectification. Similarly, when the belt 2 deflects to the other side, the other deviation rectifying mechanism acts to realize deviation rectification, which can ensure the stability of the conveyor belt operation and is beneficial to improving the reliability and practicality of the conveyor belt structure.

[0024] It can be understood that due to the single force application direction and structural limitations of the belt, it generally does not run off to both sides at the same time. Usually, it only runs off to one side. Correspondingly, the two deviation rectifying mechanisms may act alternately, but more often only one deviation rectifying mechanism acts, and there will be no situation where the deviation rectifying forces are superimposed due to simultaneous action and the belt tension is unbalanced due to simultaneous action.

[0025] Since the fundamental reason for the deviation of the belt 2 is the uneven friction caused by the inclination, wear, adhesion of foreign objects of the driving roller 3 and the wear and adhesion of foreign objects of the belt 2, after each deviation rectification is completed and the driving part is reset, the belt 2 is very likely to run off again. The labor volume of manually monitoring the deviation of the belt 2 and controlling the driving part to act for deviation rectification is large and the reliability is poor; to this end, the deviation rectifying mechanism designed in the present invention further includes a position sensor 7 and a control element 8. The control element 8 is electrically connected to the position sensor 7 and the telescopic power source 5 respectively. The position sensor 7 is arranged on one side of the conveyor belt in the width direction and is used to detect the deviation of the belt 2. The control element 8 controls the telescopic power source 5 to execute a single deviation rectification stroke according to the trigger signal of the position sensor 7; that is, the deviation amount of the belt 2 is monitored in real time by the position sensor 7. When the deviation amount exceeds the deviation rectification preset value, the telescopic power source 5 is controlled by the control element 8 to act for deviation rectification. When the belt 2 is rectified and reset to the deviation amount less than the reset preset value, the telescopic power source 5 is controlled by the control element 8 to reset, and a single deviation rectification stroke is completed; in this way, it is not only beneficial to reduce the manual labor volume, but also stable and reliable.

[0026] Specifically, please refer to Figure 2 and Figure 5, the telescopic power source 5 uses a pull rod cylinder 9, the position sensor 7 uses a travel switch 10, and the control element 8 uses a solenoid valve 11. The solenoid valve 11 is pneumatically connected to the pull rod cylinder 9 to control the telescopic movement of the pull rod cylinder 9 by switching the air path; similar to a push button switch being triggered and conducting electricity after being pressed a certain distance, and resetting and disconnecting only after rebounding a certain distance during a second press, the switching of the trigger point and the reset point of the travel switch 10 usually corresponds to a mechanical movement stroke of the push rod or swing rod of the travel switch 10, that is, the trigger point of the travel switch 10 corresponds to the above-mentioned deviation correction preset value, and the reset point corresponds to the above-mentioned reset preset value. In this way, the push rod of the travel switch 10 acts under the thrust of the offset of the belt 2. When the offset of the belt 2 exceeds the deviation correction preset value, the travel switch 10 reaches the trigger point correspondingly, is triggered and causes the solenoid valve 11 to act. The solenoid valve 11 causes the pull rod cylinder 9 to act through switching the air path for deviation correction. When the belt 2 is corrected and reset to an offset less than the reset preset value, the travel switch 10 returns to the reset point correspondingly, and the telescopic power source 5 is controlled by the control element 8 to reset, completing a single deviation correction stroke; compared with using non-contact position sensors 7, servo motors and servo drivers and other devices, the present invention uses a contact position sensor 7, a pull rod cylinder 9 and a solenoid valve 11, which not only has a lower cost, but is also simpler and more reliable in a harsh environment such as a glass production workshop.

[0027] Please refer to Figure 5 , the position sensor 7 uses a roller type travel switch 10. The roller type travel switch 10 is arranged on the side where the movable end is located. The roller of the roller type travel switch 10 is close to the belt 2. The axial direction of the roller corresponds to the telescopic direction of the pull rod cylinder 9. A synchronously rotating roller 12 is sleeved on the roller. The outer circumferential surface of the roller 12 is used to abut against the edge of the belt 2 instead of the roller. The axial dimension of the roller 12 is larger than the axial dimension of the roller. During implementation, to ensure the effectiveness of the travel switch 10, it should be ensured that the axial dimension of the roller is larger than the maximum axial displacement of the belt 2 at the position during deviation correction, and when installing, it should be ensured that the upper end of the roller is higher than the highest position of the belt 2 during deviation correction. In this embodiment, the axial dimension of the roller 12 is 120% of the axial dimension of the roller; in this way, the present invention uses a roller type travel switch 10 and sleeved a roller 12 on the roller, and uses the roller 12 with a larger axial dimension to replace the roller to be pushed, expanding the size of the working surface of the roller type travel switch 10 being pushed and triggered in the axial direction of the roller. In this way, even under the action of the deviation correction roller 4 and due to different tension levels, the position of the belt 2 in the axial direction of the roller fluctuates, and it can be ensured that the roller type travel switch 10 can be triggered by the push of the belt 2, which is beneficial to improving the reliability of the conveyor belt structure; in this embodiment, the conveyor belt is horizontally arranged, and the telescopic direction of the telescopic power source 5 is vertical.

[0028] In this embodiment, a deviation rectifying mandrel 13 that can rotate relatively coaxially is arranged inside the deviation rectifying roller 4. Both ends of the deviation rectifying mandrel 13 serve as the fixed end and the movable end, and a lubricating layer is provided between the deviation rectifying mandrel 13 and the deviation rectifying roller 4. In this way, the deviation rectifying roller 4 is also rotationally connected to the frame 1 through the deviation rectifying mandrel 13, and the deviation rectifying roller 4 can rotate with the belt 2, which is beneficial to reducing the power loss caused by the friction between the belt 2 and the deviation rectifying roller 4 and improving the practicability of the conveyor belt structure.

[0029] Please refer to Figure 2 and Figure 6 , the fixed end is connected with a spherical plain bearing 14, and the frame 1 is provided with a dowel pin 15 arranged along the length direction of the conveyor belt and adapted to the spherical plain bearing 14. The dowel pin 15 passes through the shaft hole of the spherical plain bearing 14, and the spherical plain bearing 14 allows the deviation rectifying roller 4 to swing in the vertical plane. In this way, the fixed end is connected to the frame 1 through the spherical plain bearing 14. In addition to being able to rotate around the dowel pin 15, the spherical plain bearing 14 can also deflect at a certain angle in other directions based on the dowel pin 15, so that the fixed end can not only allow the movable end to rotate closer to and away from the belt 2, but also deflect appropriately in other directions (such as the length direction of the belt 2), which is beneficial to reducing the position accuracy requirements of the dowel pin 15 and the drive ring 6 for the installation of the deviation rectifying roller 4 and making the installation simpler and easier.

[0030] Please refer to Figure 3 and Figure 5 , the movable end movably passes through the drive ring 6 and is threadedly connected with a locknut 16. There is a distance between the locknut 16 and the drive ring 6, and the distance between the locknut 16 and the drive ring 6 is 2 mm - 5 mm. In this way, when installing to make the deviation rectifying roller 4 parallel to the driving roller 3, the locknut 16 is adjusted to keep a certain distance from the drive ring 6, so that the movable end can not only move axially to cooperate with the fixed end to realize the swing of the deviation rectifying roller 4, but also prevent the movable end from accidentally coming out during deviation rectification and debugging. In this embodiment, the diameter of the deviation rectifying mandrel 13 is 60 mm, and the inner diameter of the drive ring 6 is 61 mm - 62 mm, that is, the gap between the movable end and the inner wall of one side of the drive ring 6 is 1 mm - 2 mm, and correspondingly, the rotation angle of the deviation rectifying roller 4 that can swing vertically is 2° - 5°.

[0031] Please refer to Figure 1 and Figure 2 , the deviation rectifying roller 4 is located inside the belt 2, and a tensioning roller 17 is arranged on the outer side of the belt 2 along the width direction of the conveyor belt. The outer circumferential surface of the tensioning roller 17 abuts against the outer side surface of the belt 2, and the frame 1 is provided with a tensioning adjustment mechanism for driving the tensioning roller 17 to approach and move away from the outer side surface of the belt 2. In this way, the tensioning roller 17 is arranged in cooperation with the tensioning adjustment mechanism to adjust the tension degree of the belt 2.

[0032] Please refer to Figure 1 and Figure 4, there are two tension adjusting mechanisms, which are respectively located at both ends of the tensioning roller 17. The tension adjusting mechanism includes a slide rail, a slider and a screw lifting assembly. The slide rail is vertically arranged and connected to the frame 1. The slider is correspondingly connected to the end of the tensioning roller 17 and is slidably matched with the slide rail. The screw lifting assembly includes an adjusting bolt 20 threadedly connected to the frame 1. The upper end of the bolt abuts against the bottom surface of the slider to push the slider to slide along the slide rail by rotating the adjusting bolt 20, so as to realize the vertical displacement adjustment of the tensioning roller 17. Specifically, both ends of the tensioning roller 17 are respectively provided with a chute plate 18 fixed on the frame 1. A vertical chute is formed on the surface of the chute plate 18 facing the corresponding end of the tensioning roller 17. The slider is slidably arranged in the chute, that is, the above-mentioned slide rail is formed by the chute plate 18. The adjusting bolt 20 vertically penetrates the bottom of the chute plate 18 and is threadedly connected, that is, the adjusting bolt 20 is connected to the frame 1 through the chute plate 18. The head of the adjusting bolt 20 is located outside the chute, and the rod portion extends into the chute and is rotatably connected or abutted against the slider. In this way, by turning the adjusting bolt 20 to change the position of the slider in the chute, the tension of the belt 2 can be adjusted. The structure is simple and reliable. In this embodiment, a tensioning mandrel 21 that can rotate relative to each other is coaxially arranged inside the tensioning roller 17. Both ends of the tensioning mandrel 21 are connected to the slider, which is beneficial to reducing the power loss caused by the friction between the belt 2 and the tensioning roller 17 and improving the practicability of the conveyor belt structure.

[0033] To better understand the present invention, the following is an introduction to the conveyor belt deviation correction control method based on the above-mentioned deviation-correctable conveyor belt structure. The method includes the following steps: 1) The travel switch 10 detects the deviation amount of the belt 2 towards the side where the adjacent movable end is located. The travel switch 10 is triggered when the deviation amount exceeds the deviation correction preset value, and sends a control signal to the solenoid valve 11. In this embodiment, the width of the conveyor belt is 1400 mm, and the width of the upper belt 2 is 1300 mm. To ensure that the conveyor belt can stably convey materials and avoid the deviation correction action from being triggered too frequently, the deviation correction preset value is selected to be 20 mm, and a safety distance of 30 mm is left on one side.

[0034] 2) After receiving the control signal, the solenoid valve 11 switches the air path to make the pull rod cylinder 9 drive the movable end away from the belt 2, and the belt 2 deviates and resets towards the side where the fixed end is located. 3) The travel switch 10 resets as the conveyor belt deviates and resets. After the travel switch 10 resets, it sends a control signal to the solenoid valve 11. 4) After receiving the control signal, the solenoid valve 11 switches the air path to make the pull rod cylinder 9 drive the movable end close to the belt 2 and reset. 5) Repeat steps 1) to 4) to achieve dynamic deviation correction.

[0035] In summary, for the belt structure with deviation rectification of the present invention, by designing that the telescopic end of the telescopic power source 5 is connected to a driving ring 6 with an inner diameter larger than the outer diameter of the movable end, and the driving ring 6 is movably sleeved outside the movable end, it enables the movable end to adaptively tilt and slide within the driving ring 6 when the fixed end is fixed and only rotatable, thus overcoming the conflict between the linear movement of the telescopic power source 5 and the required arc movement of the movable end; by two deviation rectification mechanisms respectively realizing deviation rectification on both sides, avoiding deviation rectification by further tensioning the belt 2, it can ensure the stability of the conveyor belt operation; the deviation rectification mechanism realizes dynamic deviation rectification through the cooperation of the roller type travel switch 10 and the solenoid valve 11, which is not only beneficial to reducing the manual labor amount, but also stable and reliable.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them. Those of ordinary skill in the art should understand that any modifications or equivalent replacements made to the technical solutions of the present invention without departing from the purpose and scope of the present technical solution shall be covered by the scope of the claims of the present invention.

Claims

1. A belt conveyor structure capable of rectification, characterized in that: It includes a conveyor belt and a deviation rectifying mechanism; the conveyor belt includes a frame and a belt. There are two rotating and parallelly spaced transmission rollers on the frame, and the belt is tensioned and looped outside the two transmission rollers; the deviation rectifying mechanism includes a deviation rectifying roller arranged along the width direction of the conveyor belt on the inner or outer side of the belt. The outer circumferential surface of one side of the deviation rectifying roller abuts against the belt. The two ends of the deviation rectifying roller respectively extend to form a fixed end and a movable end. The fixed end is rotatably connected to the frame and can make the deviation rectifying roller rotate closer to and away from the belt. The movable end is provided with a driving part. The driving part includes a telescopic power source fixed on the frame. The telescopic end of the telescopic power source is connected with a driving ring. The inner diameter of the driving ring is larger than the outer diameter of the movable end. The movable end movably passes through the driving ring, and the telescopic power source can drive the deviation rectifying roller to rotate closer to and away from the belt through the driving ring and the movable end.

2. The structure of a conveyor belt capable of rectification according to claim 1, wherein: There are two deviation rectifying mechanisms which are arranged at intervals along the length direction of the conveyor belt. The fixed ends of the deviation rectifying rollers in the two deviation rectifying mechanisms are respectively located on both sides in the width direction of the conveyor belt.

3. The structure of a conveyor belt capable of rectification according to claim 2, characterized in that: The deviation rectifying mechanism further includes a position sensor and a control element. The control element is electrically connected to the position sensor and the telescopic power source respectively. The position sensor is arranged on one side in the width direction of the conveyor belt and is used for detecting the deviation of the belt. The control element controls the telescopic power source to execute a single deviation rectifying stroke according to the trigger signal of the position sensor.

4. The structure of a conveyor belt capable of rectification according to claim 3, characterized in that: The telescopic power source adopts a pull rod cylinder, the position sensor adopts a travel switch, and the control element adopts a solenoid valve. The solenoid valve is connected to the pull rod cylinder through an air circuit to control the telescopic action of the pull rod cylinder by switching the air circuit.

5. The structure of a conveyor belt capable of rectifying deviation according to claim 3, characterized in that: The position sensor adopts a roller type travel switch. The roller type travel switch is arranged on the side where the movable end is located. The roller of the roller type travel switch is close to the belt. The axial direction of the roller corresponds to the telescopic direction of the pull rod cylinder. A synchronously rotating drum is sleeved on the roller. The outer circumferential surface of the drum is used to abut against the edge of the belt instead of the roller. The axial dimension of the drum is larger than the axial dimension of the roller.

6. The structure of a conveyor belt capable of rectifying deviation according to claim 1, characterized in that: A deviation rectifying mandrel that can rotate relatively is coaxially arranged inside the deviation rectifying roller. The two ends of the deviation rectifying mandrel are used as the fixed end and the movable end respectively. A lubricating layer is arranged between the deviation rectifying mandrel and the deviation rectifying roller.

7. The structure of a conveyor belt capable of rectifying deviation according to claim 1, characterized in that: The fixed end is connected with a spherical plain bearing. There is a dowel pin arranged along the length direction of the conveyor belt on the frame and adapted to the spherical plain bearing. The dowel pin passes through the shaft hole of the spherical plain bearing, and the spherical plain bearing allows the deviation rectifying roller to swing in the vertical plane.

8. The structure of a conveyor belt capable of rectifying deviation according to claim 1, characterized in that: The movable end movably passes through the driving ring and is threadedly connected with a locknut. There is a distance between the locknut and the driving ring. The distance between the locknut and the driving ring is 2 mm - 5 mm.

9. The structure of a conveyor belt capable of rectifying deviation according to claim 1, wherein: The deviation rectifying roller is located inside the belt. Tensioning rollers are arranged along the width direction of the conveyor belt on the outer side of the belt. The outer circumferential surface of the tensioning roller abuts against the outer side surface of the belt. A tensioning adjustment mechanism for driving the tensioning roller to approach and move away from the outer side surface of the belt is arranged on the frame.

10. The structure of a conveyor belt capable of rectifying deviation according to claim 9, characterized in that: There are two tensioning adjustment mechanisms which are respectively located at both ends of the tensioning roller. The tensioning adjustment mechanism includes a slide rail, a slider and a screw lifting assembly. The slide rail is arranged vertically and connected with the frame. The slider is correspondingly connected to the end of the tensioning roller and is slidably matched with the slide rail. The screw lifting assembly includes an adjusting bolt threadedly connected with the frame. The upper end of the bolt abuts against the bottom surface of the slider to push the slider to slide along the slide rail by rotating the adjusting bolt, so as to realize the vertical displacement adjustment of the tensioning roller.

11. A conveyor belt deviation correction control method, characterized in that: The belt deviation rectification control method is carried out based on the belt structure capable of deviation rectification as described in claim 4, and includes the following steps: 1) The travel switch detects the deviation amount of the belt towards the side where the adjacent movable end is located. The travel switch is triggered when the deviation amount exceeds the preset deviation rectification value, and sends a control signal to the solenoid valve; 2) After receiving the control signal, the solenoid valve switches the gas path to make the pull rod cylinder drive the movable end away from the belt, and the belt deviates and resets towards the side where the fixed end is located; 3) The travel switch resets as the conveyor belt deviates and resets. After the travel switch resets, it sends a control signal to the solenoid valve; 4) After receiving the control signal, the solenoid valve switches the gas path to make the pull rod cylinder drive the movable end close to the belt and reset; 5) Repeat steps 1) to 4) to achieve dynamic deviation rectification.

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