A pneumatic deviation-correcting system and method for a double-wound roller conveyor

Abstract

This invention relates to the field of conveyor belt alignment, and provides a pneumatic alignment system and method for a double-wound alignment roller conveyor belt. The alignment system includes a frame, a drive roller, a driven roller, and a conveyor belt, with an alignment device disposed between the drive roller and the driven roller. The alignment device includes: two alignment rollers, arranged in parallel on the frame, with the conveyor belt wound between them; a drive assembly that acts on the alignment rollers to move them along the conveying direction of the conveyor belt; and a detection assembly that detects the conveyor belt's deviation perpendicular to the conveying direction. The detection assembly is connected to the drive assembly. When the detection assembly detects a deviation in the conveyor belt, the drive assembly moves the alignment rollers to align the conveyor belt. The alignment method uses the above-described alignment system. This invention can improve the speed and accuracy of conveyor belt alignment, ensuring rapid and accurate alignment of the conveyor belt under high tension and high load conditions.

Description

Technical Field

[0001] This invention relates to the field of conveyor belt correction technology, and more specifically, to a pneumatic correction system for a double-wound correction roller conveyor belt. Background Technology

[0002] The content in this section only provides background information related to this invention and may not constitute prior art.

[0003] The roller-guided conveyor belt drive system is widely used in industries such as packaging, port loading and unloading, mining trunk lines, and power plant coal transportation. These high-speed, heavy-duty, long conveyor belt applications have high downtime costs. Belt misalignment can lead to serious accidents such as product material loss, abnormal equipment wear, or even belt tearing. Therefore, efficient and reliable automatic correction technology is required to ensure its long-term continuous and stable operation.

[0004] The core of a traditional straightening conveyor system is a pivot-type straightening idler assembly. The structure includes an idler frame that can swing around a vertical axis, trough-shaped idlers, and detection guide rollers on both sides. In actual use, when the conveyor belt deviates and contacts one of the guide rollers, the frictional force pushes the entire roller frame to deflect around the pivot, causing the idler axis to form an angle with the direction of the conveyor belt. The frictional force generated by the rotation of the idler is thus decomposed into a lateral component pointing towards the center of the conveyor belt, thereby pushing the conveyor belt back to the normal track.

[0005] However, the aforementioned technologies have the following drawbacks: the lateral correction force generated by the idler group that relies on a single pivot swing after being triggered by the friction of the conveyor belt is very limited. When dealing with deviation under heavy load and high speed conditions, the correction torque will be seriously insufficient. When the conveyor belt tension is large or the load inertia is high, the mechanical leverage effect and torque output in the related technologies are limited, which leads to the correction action being delayed or even completely failing, making it difficult to effectively guide the already deviated conveyor belt back to the center position. Summary of the Invention

[0006] To address the aforementioned technical problems, the present invention aims to provide a pneumatic belt alignment system with double-wound rollers, which can improve the speed and accuracy of belt alignment and ensure rapid and accurate belt alignment under high tension and high load conditions.

[0007] The objective of this invention is achieved through the following technical solution:

[0008] On the one hand, the present invention provides a pneumatic correction system for a double-wound correction roller conveyor belt.

[0009] A pneumatic belt alignment system for a double-wound alignment roller conveyor includes a frame, a drive roller, a driven roller, and a conveyor belt. An alignment device is disposed between the drive roller and the driven roller. The alignment device includes: two alignment rollers arranged in parallel on the frame, with the conveyor belt wound between them; a drive assembly acting on the alignment rollers to move them along the conveying direction of the conveyor belt; and a detection assembly for detecting any deviation of the conveyor belt perpendicular to the conveying direction. The detection assembly is connected to the drive assembly; when the detection assembly detects a deviation in the conveyor belt, the drive assembly moves the alignment rollers to correct the belt alignment.

[0010] In some possible embodiments, the drive assembly includes a first drive cylinder, a second drive cylinder, and a connecting frame. The connecting frame is slidably disposed on the frame. One end of each of the two guiding rollers is rotatably connected to the connecting frame. The cylinder barrels of the first and second drive cylinders are disposed on the frame. The output ends of the first and second drive cylinders are connected to the connecting frame. The detection assembly is connected to the first and second drive cylinders respectively.

[0011] In some possible embodiments, a through hole is provided on the connecting frame along the length of the conveyor belt, and a connecting screw is slidably inserted through the through hole. One end of the connecting screw is detachably connected to the output end of the first driving cylinder, and the other end is detachably connected to the output end of the second driving cylinder. An external thread is provided on the outer surface of the connecting screw, and an adjusting lock nut is threaded on the connecting screw. There are two adjusting lock nuts, which are respectively located at both ends of the connecting frame. The sidewalls of the two adjusting lock nuts that are close to each other are used to abut against the connecting frame to limit the position of the connecting screw on the connecting frame.

[0012] In some possible embodiments, the drive assembly further includes a third drive cylinder and a fourth drive cylinder, the cylinder barrels of the third drive cylinder and the fourth drive cylinder are both mounted on the frame, the third drive cylinder and the fourth drive cylinder are respectively located on both sides of the connecting frame, the output ends of the third drive cylinder and the fourth drive cylinder are used to abut against the connecting frame, and the detection assembly is connected to the third drive cylinder and the fourth drive cylinder respectively.

[0013] In some possible embodiments, the output ends of the third and fourth drive cylinders are detachably provided with adjusting locking pins, which are used to abut against the connecting frame.

[0014] In some possible embodiments, the drive assembly further includes a first solenoid valve, a second solenoid valve, and a third solenoid valve. The first solenoid valve is configured as a dual-electrically controlled three-position five-way bleed solenoid valve, and the second and third solenoid valves are both configured as single-electrically controlled two-position five-way solenoid valves. One gas outlet of the first solenoid valve is connected to the drive chamber of the first drive cylinder, and the other gas outlet of the first solenoid valve is connected to the drive chamber of the second drive cylinder. The return chambers of the first and second drive cylinders are disconnected. One gas outlet of the second solenoid valve is connected to the drive chamber of the third drive cylinder, and the other gas outlet of the second solenoid valve is connected to the return chamber of the third drive cylinder. One gas outlet of the third solenoid valve is connected to the drive chamber of the fourth drive cylinder, and the other gas outlet of the third solenoid valve is connected to the return chamber of the fourth drive cylinder. The first, second, and third solenoid valves are all connected to the detection assembly.

[0015] In some possible embodiments, the detection assembly includes a first detection module and a second detection module, both mounted on a frame. The first detection module is located on the side of the frame closer to the connecting frame, and the second detection module is located on the side of the frame away from the connecting frame. The first detection module includes a first light emitter and a first light receiver, which are respectively located on the upper and lower sides of the conveyor belt. The first light emitter and the first light receiver are connected to an external power supply. When the conveyor belt blocks the photoelectric path between the first light emitter and the first light receiver, the external power supply is activated. The second detection module includes a second light emitter and a second light receiver, which are respectively located on the upper and lower sides of the conveyor belt. The second light emitter and the second light receiver are connected to an external power supply. When the conveyor belt blocks the photoelectric path between the second light emitter and the second light receiver, the external power supply is activated. The first detection module is electrically connected to a first solenoid valve and a second solenoid valve, and the second detection module is electrically connected to a first solenoid valve and a third solenoid valve.

[0016] In some possible embodiments, a first one-way throttle valve is connected between the driving chamber of the first driving cylinder and the first solenoid valve; a second one-way throttle valve is connected between the driving chamber of the second driving cylinder and the first solenoid valve.

[0017] On the other hand, the present invention also provides a pneumatic correction method for a double-wound correction roller conveyor belt.

[0018] A pneumatic belt alignment method for a double-wound alignment roller conveyor belt, employing the alignment system described above, includes the following steps:

[0019] The photoelectric signal is acquired through the first detection module and the second detection module; when the photoelectric signal detected by the first detection module is a disconnection signal, the drive component is controlled to perform a first action, driving the straightening roller to move toward the driven roller, so as to drive the conveyor belt to deflect away from the connecting frame; when the photoelectric signal detected by the second detection module is a disconnection signal, the drive component is controlled to perform a second action, driving the straightening roller to move toward the driving roller, so as to drive the conveyor belt to deflect toward the connecting frame.

[0020] In some possible embodiments, the first action includes: adjusting the second solenoid valve to the left energized position, connecting the air port P of the second solenoid valve to the return air chamber of the third drive cylinder via air port B, and venting the drive air chamber of the third drive cylinder through the air port A of the second solenoid valve, thereby retracting the output end of the third drive cylinder; adjusting the first solenoid valve to the left energized position, venting the drive air chamber of the second drive cylinder through the second one-way throttle valve from the air port B of the first solenoid valve, and connecting the air port A of the first solenoid valve to the drive air chamber of the first drive cylinder through the first one-way throttle valve, thereby moving the output end of the first drive cylinder forward;

[0021] The second action includes: adjusting the third solenoid valve to the left energized position, connecting the air port P of the third solenoid valve to the return air chamber of the fourth drive cylinder via air port B, and venting the drive air chamber of the fourth drive cylinder through the air port A of the third solenoid valve, causing the output end of the fourth drive cylinder to retract; adjusting the first solenoid valve to the right energized position, venting the drive air chamber of the first drive cylinder through the first one-way throttle valve from the air port A of the first solenoid valve, and connecting the air port B of the first solenoid valve to the drive air chamber of the second drive cylinder through the second one-way throttle valve, causing the output end of the second drive cylinder to move forward.

[0022] In summary, the technical solutions of the embodiments of the present invention have at least the following advantages and beneficial effects:

[0023] 1. By setting up a double-wound correction roller structure, the conveyor belt is wound between the two rollers, which significantly increases the contact area between the correction mechanism and the conveyor belt. This results in a greater lateral correction force during the correction process. Compared with the traditional single-roller correction scheme, this invention can effectively overcome the resistance to correction of high-tension, high-load conveyor belts during operation, thereby significantly improving the correction effect and correction capability. It is especially suitable for heavy-load, high-speed conveying scenarios such as mines and ports, and can effectively avoid problems such as conveyor belt deviation, wear, or material spillage caused by insufficient correction force.

[0024] 2. An automatic control method combining pneumatic drive and photoelectric detection is adopted. Through through-beam photoelectric devices arranged on both sides of the conveyor belt, the position of the conveyor belt is detected in real time. When the conveyor belt is deviated, the corresponding solenoid valve and cylinder are triggered. The response speed is fast and the detection accuracy is high. It can realize continuous automatic deviation correction without human intervention, improve the level of system automation control and operational reliability, and reduce downtime and losses caused by untimely human intervention.

[0025] 3. The drive assembly employs two sets of cylinders working in tandem. The first and second drive cylinders form one set, used to perform the correction movement of the straightening roller. The third and fourth drive cylinders form another set, used for the rapid return of the straightening roller to center and the contact positioning after the straightening roller returns to center. Through the linkage control of the first, second, and third solenoid valves, the pairing of the two sets of cylinders is realized, ensuring that after the belt is corrected, the straightening roller can quickly and accurately recover and stably maintain the center position to ensure the belt is accurately aligned, avoiding excessive errors caused by the belt being corrected but the straightening roller lagging behind and continuing to correct the belt.

[0026] 4. This invention has good applicability and scalability. It is not only applicable to conventional industrial conveyor belts, but can also be adapted to conveyor belts of different widths and tensions by adjusting parameters such as cylinder stroke and cylinder air pressure. In addition, the pneumatic solution of this invention can be equivalently replaced by a hydraulic or oil pressure drive system, thereby being able to cope with higher loads or special environmental requirements. It has strong flexibility and provides a reliable and effective technical solution for conveyor belt correction under different working conditions. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention;

[0028] Figure 2 This is a schematic diagram of the correction device according to an embodiment of the present invention;

[0029] Figure 3 This is a schematic diagram of the structure of the driving component according to an embodiment of the present invention;

[0030] Figure 4 for Figure 3 Enlarged view of part A in the image.

[0031] Icons: 1. Driving roller; 11. Driven roller; 12. Conveyor belt; 13. Tensioning assembly; 2. Correction device; 21. Correcting roller; 3. Drive assembly; 301. Connecting frame; 302. Connecting screw; 303. Connecting threaded hole; 304. Mounting rod; 305. Adjusting lock nut; 306. Adjusting lock pin; 31. First drive cylinder; 32. Second drive cylinder; 33. Third drive cylinder; 34. Fourth drive cylinder; 35. First solenoid valve; 36. Second solenoid valve; 37. Third solenoid valve; 4. Detection assembly; 41. First detection module; 411. First light emitter; 412. First light receiver; 42. Second detection module; 421. Second light emitter; 422. Second light receiver; 5. First one-way throttle valve; 6. Second one-way throttle valve. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0033] The following is for reference Figures 1 to 4 The present invention will be described in further detail below.

[0034] On the one hand, the present invention provides a pneumatic correction system for a double-wound correction roller conveyor belt.

[0035] Reference Figure 1 A pneumatic belt alignment system for a double-wound alignment roller conveyor includes a frame (not shown in the figure), a drive roller 1, a driven roller 11, and a conveyor belt 12. An alignment device 2 is provided between the drive roller 1 and the driven roller 11. As one embodiment of the present invention, the frame can be adjusted by those skilled in the art according to actual production needs, as long as it can be installed. This is common knowledge to those skilled in the art and will not be elaborated here.

[0036] Reference Figure 1 and Figure 2 Both the driving roller 1 and the driven roller 11 are rotatably connected to the frame, such as... Figure 1 As shown, the driving roller 1 is located on the left side and the driven roller 11 is located on the right side. The rotation direction of the driving roller 1 is set to clockwise, and the rotation direction of the driven roller 11 is also set to clockwise.

[0037] As one embodiment of the present invention, such as Figure 1As shown, the conveying device of the present invention mainly conveys straight plates. In the actual conveying process, the straight plate first comes into contact with the conveyor belt 12 on one side of the driven roller 11 from the bottom right side. Under the pulling force of the conveyor belt 12 on the side of the driven roller 11, the straight plate is conveyed.

[0038] Reference Figure 1 and Figure 2 As one embodiment of the present invention, the correction device 2 includes: a correction roller 21, a drive assembly 3, and a detection assembly 4.

[0039] Reference Figure 1 and 2 There are two straightening rollers 21, arranged in parallel and mounted on the frame. The conveyor belt 12 is wound between the two straightening rollers 21. A tensioning assembly 13 is provided between the straightening rollers 21 and the drive roller 1. The tensioning assembly 13 includes three staggered tension rollers, and the conveyor belt 12 is wound in a serpentine pattern around the three tension rollers. In actual operation, the tension of the conveyor belt 12 can be adjusted by adjusting the height difference between the three tension rollers.

[0040] Reference Figure 1 and Figure 2 The drive component 3 acts on the straightening roller 21 to drive the straightening roller 21 to move along the conveying direction of the conveyor belt 12, and the detection component 4 is used to detect the offset of the conveyor belt 12 perpendicular to the conveying direction.

[0041] As one embodiment of the present invention, refer to Figure 2 The detection component 4 is connected to the drive component 3. When the detection component 4 detects that the conveyor belt 12 is deviated, the drive component 3 drives the correction roller 21 to move in order to correct the deviation of the conveyor belt 12.

[0042] Among them, reference Figure 2 The drive assembly 3 includes a first drive cylinder 31, a second drive cylinder 32, and a connecting frame 301. The connecting frame 301 is slidably mounted on the frame. One end of each of the two guide rollers 21 is rotatably connected to the connecting frame 301. The cylinder barrels of the first drive cylinder 31 and the second drive cylinder 32 are mounted on the frame. The output ends of the first drive cylinder 31 and the second drive cylinder 32 are connected to the connecting frame 301. The detection assembly 4 is connected to the first drive cylinder 31 and the second drive cylinder 32 respectively.

[0043] Reference Figure 2 A through hole (not shown in the figure) is provided on the connecting frame 301 along the length direction of the conveyor belt 12. A connecting screw 302 is slidably inserted in the through hole. One end of the connecting screw 302 is detachably connected to the output end of the first driving cylinder 31, and the other end is detachably connected to the output end of the second driving cylinder 32.

[0044] Reference Figure 3 and Figure 4 In one embodiment of the present invention, both ends of the connecting screw 302 are provided with connecting threaded holes 303. The output ends of the first driving cylinder 31 and the second driving cylinder 32 are each equipped with mounting rods 304. The outer circumferential surface of the mounting rod 304 is provided with external threads, and the connecting threaded holes 303 are provided with internal threads that are compatible with the external threads on the mounting rod 304. In actual use, the output ends of the first driving cylinder 31 and the second driving cylinder 32 can be connected to the two ends of the connecting screw 302 through the mounting rods 304.

[0045] In one embodiment of the present invention, the outer surface of the connecting screw 302 is provided with an external thread, as shown in the reference. Figure 3 and Figure 4 The connecting screw 302 is threaded with an adjusting lock nut 305. There are two adjusting lock nuts 305, which are located at both ends of the connecting frame 301. The side walls of the two adjusting lock nuts 305 that are close to each other are used to abut against the connecting frame 301 to limit the position of the connecting screw 302 on the connecting frame 301.

[0046] In actual use, by adjusting the position of the adjusting lock nut 305 on the connecting screw 302, the position of the connecting frame 301 on the connecting screw 302 can be adjusted. Before the conveyor belt 12 starts running, the connecting frame 301 is ensured to be in the middle of the connecting screw 302. At this time, the conveyor belt 12 is in the middle position on the driving roller 1, the driven roller 11 and the guiding roller 21.

[0047] Reference Figure 3 and Figure 4 In one embodiment of the present invention, the drive assembly 3 further includes a third drive cylinder 33 and a fourth drive cylinder 34. The cylinder barrels of the third drive cylinder 33 and the fourth drive cylinder 34 are both mounted on the frame. The third drive cylinder 33 and the fourth drive cylinder 34 are respectively located on both sides of the connecting frame 301. The third drive cylinder 33 is located below the second drive cylinder 32, and the fourth drive cylinder 34 is located below the first drive cylinder 31.

[0048] Reference Figure 4 The output ends of the third drive cylinder 33 and the fourth drive cylinder 34 are used to abut against the connecting frame 301, and the detection component 4 is connected to the third drive cylinder 33 and the fourth drive cylinder 34 respectively.

[0049] Reference Figure 4In one embodiment of the present invention, the output ends of the third drive cylinder 33 and the fourth drive cylinder 34 are detachably provided with adjusting locking pins 306. The adjusting locking pins 306 are used to abut against the connecting frame 301. In actual use, by adjusting the position of the adjusting locking pins 306 at the output ends of the third drive cylinder 33 and the fourth drive cylinder 34, the position of the locking nut 305 on the connecting screw 302 can be adjusted accordingly, ensuring that when the straightening roller 21 is centered, the output ends of the third drive cylinder 33 and the fourth drive cylinder 34 abut against the connecting frame 301.

[0050] Reference Figure 2 and Figure 3 The drive assembly 3 also includes a first solenoid valve 35, a second solenoid valve 36, and a third solenoid valve 37. In one embodiment of the invention, the first solenoid valve 35 is configured as a dual-electrically controlled three-position five-way central-release solenoid valve, while the second solenoid valve 36 and the third solenoid valve 37 are both configured as single-electrically controlled two-position five-way solenoid valves. Specifically, the gas outlet A of the first solenoid valve 35 is connected to the drive chamber of the first drive cylinder 31, and the gas outlet B of the first solenoid valve 35 is connected to the drive chamber of the second drive cylinder 32. The return chambers of the first drive cylinder 31 and the second drive cylinder 32 are unconnected. Because the return chambers of the first drive cylinder 31 and the second drive cylinder 32 are unconnected, when the first solenoid valve 35 is in the neutral-position depressurization state, both its gas outlet A and gas outlet B are open and unconnected. At this time, both the first drive cylinder 31 and the depressurization drive cylinder are in an unconnected follow-up state.

[0051] Reference Figure 3 and Figure 4 The gas outlet A of the second solenoid valve 36 is connected to the driving chamber of the third driving cylinder 33, the gas outlet B of the second solenoid valve 36 is connected to the return chamber of the third driving cylinder 33, the gas outlet A of the third solenoid valve 37 is connected to the driving chamber of the fourth driving cylinder 34, and the gas outlet B of the third solenoid valve 37 is connected to the return chamber of the fourth driving cylinder 34. The first solenoid valve 35, the second solenoid valve 36 and the third solenoid valve 37 are all connected to the detection component 4.

[0052] Among them, reference Figure 1 and Figure 3 The detection component 4 includes a first detection module 41 and a second detection module 42. Both the first detection module 41 and the second detection module 42 are mounted on the frame. The first detection module 41 is mounted on the side of the frame close to the connecting frame 301, and the second detection module 42 is mounted on the side of the frame away from the connecting frame 301.

[0053] As one embodiment of the present invention, refer to Figure 1 and Figure 3The first detection module 41 includes a first light transmitter 411 and a first light receiver 412. The first light transmitter 411 and the first light receiver 412 are respectively located on the upper and lower sides of the conveyor belt 12. The first light transmitter 411 and the first light receiver 412 are connected to an external power supply. When the conveyor belt 12 blocks the photoelectric path between the first light transmitter 411 and the first light receiver 412, the external power supply is turned on.

[0054] As one embodiment of the present invention, refer to Figure 1 and Figure 3 The second detection module 42 includes a second light emitter 421 and a second light receiver 422. The second light emitter 421 and the second light receiver 422 are respectively located on the upper and lower sides of the conveyor belt 12. The second light emitter 421 and the second light receiver 422 are connected to an external power supply. When the conveyor belt 12 blocks the photoelectric path between the second light emitter 421 and the second light receiver 422, the external power supply is turned on.

[0055] The first detection module 41 is electrically connected to the first solenoid valve 35 and the second solenoid valve 36, and the second detection module 42 is electrically connected to the first solenoid valve 35 and the third solenoid valve 37.

[0056] Reference Figure 3 and Figure 4 A first one-way throttle valve 5 is connected between the driving chamber of the first driving cylinder 31 and the first solenoid valve 35; a second one-way throttle valve 6 is connected between the driving chamber of the second driving cylinder 32 and the first solenoid valve 35.

[0057] Reference Figure 3 and Figure 4 The first solenoid valve 35, the second solenoid valve 36 and the third solenoid valve 37 are connected in parallel. As one embodiment of the present invention, the voltage of the external power supply is set to 24V.

[0058] On the other hand, the present invention also provides a pneumatic correction method for the conveyor belt 12 with double-wound correction rollers 21.

[0059] A pneumatic belt alignment method for a double-wound alignment roller conveyor belt, employing the alignment system described above, includes the following steps:

[0060] The photoelectric signal is acquired by the first detection module 41 and the second detection module 42. In actual use, the first light transmitter 411 emits the photoelectric signal, and the first light receiver 412 is located directly below the first light transmitter 411. When the conveyor belt 12 does not deviate, the first light receiver 412 can receive the photoelectric signal emitted by the first light transmitter 411. At this time, the external power supply is in the off state.

[0061] When the photoelectric signal detected by the first detection module 41 is a disconnection signal, the conveyor belt 12 shifts towards the connecting frame 301. At this time, the conveyor belt 12 blocks the photoelectric signal emitted by the first light transmitter 411, and the first light receiver 412 cannot receive the corresponding photoelectric signal. At this time, the external power supply is in the conducting state. At this time, the control drive component 3 executes the first action, driving the guide roller 21 to move towards the driven roller 11, so as to drive the conveyor belt 12 to shift away from the connecting frame 301.

[0062] When the photoelectric signal detected by the second detection module 42 is a disconnection signal, the conveyor belt 12 shifts away from the connecting frame 301. At this time, the conveyor belt 12 blocks the photoelectric signal emitted by the second light transmitter 421, and the second light receiver 422 cannot receive the corresponding photoelectric signal. At this time, the external power supply is in the conducting state. Then, the control drive component 3 executes the second action, driving the adjusting roller 21 to move towards the drive roller 1, so as to drive the conveyor belt 12 to shift towards the connecting frame 301.

[0063] As one embodiment of the present invention, the first action includes:

[0064] The second solenoid valve 36 is adjusted to the left energized position. The air port P of the second solenoid valve 36 is connected to the return air chamber of the third drive cylinder 33 through the air port B. The drive air chamber of the third drive cylinder 33 is vented through the air port A of the second solenoid valve 36, so that the output end of the third drive cylinder 33 is retracted.

[0065] The first solenoid valve 35 is adjusted to the left energized position. The drive chamber of the second drive cylinder 32 exhausts air from port B of the first solenoid valve 35 through the second one-way throttle valve 6. Port A of the first solenoid valve 35 is connected to the drive chamber of the first drive cylinder 31 through the first one-way throttle valve 5, causing the output end of the first drive cylinder 31 to move forward. As the output end of the first drive cylinder 31 moves forward, it can drive the connecting frame 301 and then drive the straightening roller 21 to move towards the driven roller 11, thereby realizing the correction of the conveyor belt 12.

[0066] After the conveyor belt 12 completes the correction, it stops blocking the photoelectric signal of the first detection module 41. At this time, the photoelectric signal emitted by the first light transmitter 411 is received again by the first light receiver 412. The photoelectric signal detected by the first detection module 41 is a conduction signal. At this time, the second solenoid valve 36 is adjusted to the right-side power-off position. The air port P of the second solenoid valve 36 is connected to the driving air chamber of the third driving cylinder 33 through the air port A. The return air chamber of the third driving cylinder 33 is exhausted through the air port B of the second solenoid valve 36, causing the output end of the third driving cylinder 33 to extend rapidly. During this process, the first solenoid valve 35 is in the neutral pressure relief position, and the first one-way throttle valve... Both valves 5 and 6 are in the open state. At this time, both the first drive cylinder 31 and the second drive cylinder 32 are in the airless follow-up state. When the output end of the third drive cylinder 33 extends, the output end of the third drive cylinder 33 abuts against the connecting frame 301, thereby driving the connecting frame 301 to move towards the direction of the drive roller 1. During this process, the output end of the fourth drive cylinder 34 remains stationary. As the output end of the third drive cylinder 33 moves, it drives the connecting frame 301 to abut against the output end of the fourth drive cylinder 34. At this time, the connecting frame 301 and the correction roller 21 return to the initial centering state, thereby completing one correction of the conveyor belt 12.

[0067] The second action includes:

[0068] The third solenoid valve 37 is adjusted to the left energized position. The air port P of the third solenoid valve 37 is connected to the return air chamber of the fourth drive cylinder 34 through the air port B. The drive air chamber of the fourth drive cylinder 34 is exhausted through the air port A of the third solenoid valve 37, so that the output end of the fourth drive cylinder 34 is retracted.

[0069] The first solenoid valve 35 is adjusted to the right-side energized position. The drive chamber of the first drive cylinder 31 exhausts air from port A of the first solenoid valve 35 through the first one-way throttle valve 5. The port B of the first solenoid valve 35 is connected to the drive chamber of the second drive cylinder 32 through the second one-way throttle valve 6, causing the output end of the second drive cylinder 32 to move forward. As the output end of the second drive cylinder 32 moves forward, it can drive the connecting frame 301 and then drive the correction roller 21 to move towards the direction of the drive roller 1, thereby realizing the correction of the conveyor belt 12.

[0070] After the conveyor belt 12 completes the correction, it stops blocking the photoelectric signal of the second detection module 42. At this time, the photoelectric signal emitted by the second light transmitter 421 is received again by the second light receiver 422. The photoelectric signal detected by the second detection module 42 is a conduction signal. At this time, the third solenoid valve 37 is adjusted to the right-side power-off position. The air port P of the third solenoid valve 37 is connected to the driving air chamber of the fourth driving cylinder 34 through the air port A. The return air chamber of the fourth driving cylinder 34 is exhausted through the air port B of the third solenoid valve 37, causing the output end of the fourth driving cylinder 34 to extend rapidly. During this process, the first solenoid valve 35 is in the neutral pressure relief position, and the first one-way throttle valve... Both valves 5 and 6 are in the open state. At this time, both the first drive cylinder 31 and the second drive cylinder 32 are in the airless follow-up state. When the output end of the fourth drive cylinder 34 extends, the output end of the fourth drive cylinder 34 abuts against the connecting frame 301, thereby driving the connecting frame 301 to move towards the driven roller 11. During this process, the output end of the third drive cylinder 33 remains stationary. As the output end of the fourth drive cylinder 34 moves, it drives the connecting frame 301 to abut against the output end of the third drive cylinder 33. At this time, the connecting frame 301 and the straightening roller 21 return to the initial centering state, thereby completing one correction of the conveyor belt 12.

[0071] In one embodiment of the present invention, by setting the fluid flow rates of the first one-way throttle valve 5 and the second one-way throttle valve 6, the moving speed of the output end of the first drive cylinder 31 is less than the moving speed of the output end of the third drive cylinder 33, and the moving speed of the output end of the second drive cylinder 32 is less than the moving speed of the output end of the fourth drive cylinder 34. With the above settings, when burrs or other interference appear at the edge of the conveyor belt 12, the presence of these burrs interferes with the photoelectric signal transmission of the detection component 4. While the burrs affect the conduction or disconnection of the photoelectric signal when they reach the detection position of the detection component 4, the impact is extremely short-lived. By adjusting the fluid flow rates of the first one-way throttle valve 5 and the second one-way throttle valve 6, the movement of the output ends of the first drive cylinder 31 and the second drive cylinder 32 exhibits a significant lag. Only when the photoelectric signal of the detection component 4 is blocked for a longer period—that is, when the conveyor belt 12 actually shifts rather than being blocked by burrs—will the first drive cylinder 31 and the second drive cylinder 32 actually move. Before operation, the corresponding third drive cylinder 33 or fourth drive cylinder 34 has retracted a certain period of time in advance, making room for the first drive cylinder 31 or second drive cylinder 32 to move the connecting frame 301 and the straightening roller 21. The above setting is equivalent to forming a burr filter effect, which can effectively avoid the interference of burrs on the correction system. When burrs appear on the edge of the conveyor belt 12, they can be accurately filtered. The first drive cylinder 31 and the second drive cylinder 32 will not move blindly in time due to the burrs blocking the photoelectric signal of the detection component 4, thus avoiding the conveyor belt 12 from repeatedly moving under the drive of the correction system. On the one hand, it improves the service life of the conveyor belt 12, and on the other hand, it effectively improves the practicality and reliability of the device.

[0072] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A pneumatic belt alignment system for a double-wound alignment roller conveyor, comprising a frame, a driving roller (1), a driven roller (11), and a conveyor belt (12), characterized in that: A correction device (2) is provided between the driving roller (1) and the driven roller (11). The correction device (2) includes: There are two straightening rollers (21), which are arranged in parallel and mounted on the frame. The conveyor belt (12) is wound between the two straightening rollers (21). The drive assembly (3) acts on the straightening roller (21) to drive the straightening roller (21) to move along the conveying direction of the conveyor belt (12). The drive assembly (3) includes a first drive cylinder (31), a second drive cylinder (32) and a connecting frame (301). The connecting frame (301) is slidably disposed on the frame. One end of the two straightening rollers (21) is rotatably connected to the connecting frame (301). The cylinders of the first drive cylinder (31) and the second drive cylinder (32) are disposed on the frame. The output ends of the first drive cylinder (31) and the second drive cylinder (32) are connected to the connecting frame (301). And a detection component (4), which is used to detect the offset of the conveyor belt (12) in the direction perpendicular to the conveying direction. The detection component (4) is connected to the first drive cylinder (31) and the second drive cylinder (32) respectively. When the detection component (4) detects that the conveyor belt (12) is offset, the drive component (3) drives the correction roller (21) to move to correct the conveyor belt (12). The drive assembly (3) further includes a third drive cylinder (33) and a fourth drive cylinder (34). The cylinder barrels of the third drive cylinder (33) and the fourth drive cylinder (34) are both mounted on the frame. The third drive cylinder (33) and the fourth drive cylinder (34) are respectively located on both sides of the connecting frame (301). The output ends of the third drive cylinder (33) and the fourth drive cylinder (34) are used to abut against the connecting frame (301). The detection assembly (4) is connected to the third drive cylinder (33) and the fourth drive cylinder (34) respectively. The output ends of the third drive cylinder (33) and the fourth drive cylinder (34) are detachably provided with adjusting locking pins (306), which are used to abut against the connecting frame (301); The drive assembly (3) further includes a first solenoid valve (35), a second solenoid valve (36), and a third solenoid valve (37). The first solenoid valve (35) is configured as a dual-electrically controlled three-position five-way central leakage solenoid valve. The second solenoid valve (36) and the third solenoid valve (37) are both configured as single-electrically controlled two-position five-way solenoid valves. One gas outlet of the first solenoid valve (35) is connected to the drive chamber of the first drive cylinder (31), and the other gas outlet of the first solenoid valve (35) is connected to the drive chamber of the second drive cylinder (32). The first drive cylinder (31) and the second drive cylinder (32) The return air chamber of the second solenoid valve (36) is open, one gas outlet of the second solenoid valve (36) is connected to the drive air chamber of the third drive cylinder (33), the other gas outlet of the second solenoid valve (36) is connected to the return air chamber of the third drive cylinder (33), one gas outlet of the third solenoid valve (37) is connected to the drive air chamber of the fourth drive cylinder (34), the other gas outlet of the third solenoid valve (37) is connected to the return air chamber of the fourth drive cylinder (34), and the first solenoid valve (35), the second solenoid valve (36) and the third solenoid valve (37) are all connected to the detection component (4); A first one-way throttle valve (5) is connected between the driving chamber of the first driving cylinder (31) and the first solenoid valve (35), and a second one-way throttle valve (6) is connected between the driving chamber of the second driving cylinder (32) and the first solenoid valve (35).

2. A pneumatic belt alignment system for a double-wound alignment roller conveyor belt according to claim 1, characterized in that: The connecting frame (301) has a through hole along the length of the conveyor belt (12). A connecting screw (302) slides through the through hole. One end of the connecting screw (302) is detachably connected to the output end of the first driving cylinder (31), and the other end is detachably connected to the output end of the second driving cylinder (32). The outer surface of the connecting screw (302) has an external thread. An adjusting lock nut (305) is threaded on the connecting screw (302). There are two adjusting lock nuts (305). The two adjusting lock nuts (305) are respectively located at both ends of the connecting frame (301). The sidewalls of the two adjusting lock nuts (305) that are close to each other are used to abut against the connecting frame (301) to limit the position of the connecting screw (302) on the connecting frame (301).

3. A pneumatic belt alignment system for a double-wound alignment roller conveyor belt according to claim 1, characterized in that: The detection component (4) includes a first detection module (41) and a second detection module (42). Both the first detection module (41) and the second detection module (42) are mounted on the frame. The first detection module (41) is mounted on the side of the frame close to the connecting frame (301), and the second detection module (42) is mounted on the side of the frame away from the connecting frame (301). The first detection module (41) includes a first light emitter (411) and a first light receiver (412). The first light emitter (411) and the first light receiver (412) are respectively located on the upper and lower sides of the conveyor belt (12). The first light emitter (411) and the first light receiver (412) are connected to an external power supply. When the conveyor belt (12) blocks the photoelectric path between the first light emitter (411) and the first light receiver (412), the external power supply is turned on. The second detection module (42) includes a second light emitter (421) and a second light receiver (422). The second light emitter (421) and the second light receiver (422) are respectively located on the upper and lower sides of the conveyor belt (12). The second light emitter (421) and the second light receiver (422) are connected to an external power supply. When the conveyor belt (12) blocks the photoelectric path between the second light emitter (421) and the second light receiver (422), the external power supply is turned on. The first detection module (41) is electrically connected to the first solenoid valve (35) and the second solenoid valve (36), and the second detection module (42) is electrically connected to the first solenoid valve (35) and the third solenoid valve (37).

4. A pneumatic correction method for a double-wound correction roller conveyor belt, characterized in that, The method of using a correction system as described in any one of claims 1-3 includes the following steps: Photoelectric signals are acquired through the first detection module (41) and the second detection module (42); When the photoelectric signal detected by the first detection module (41) is a disconnection signal, the control drive component (3) performs the first action, driving the guide roller (21) to move toward the driven roller (11) so as to drive the conveyor belt (12) to deflect away from the connecting frame (301); When the photoelectric signal detected by the second detection module (42) is a disconnection signal, the control drive component (3) performs a second action, driving the correction roller (21) to move toward the active roller (1) so as to drive the conveyor belt (12) to shift toward the direction close to the connecting frame (301).

5. A pneumatic belt alignment method for a double-wound alignment roller conveyor belt according to claim 4, characterized in that, The first action includes: The second solenoid valve (36) is adjusted to the left energized position. The air port P of the second solenoid valve (36) is connected to the return air chamber of the third drive cylinder (33) through the air port B. The drive air chamber of the third drive cylinder (33) is exhausted through the air port A of the second solenoid valve (36), so that the output end of the third drive cylinder (33) is retracted. The first solenoid valve (35) is adjusted to the left energized position. The drive chamber of the second drive cylinder (32) exhausts from the port B of the first solenoid valve (35) through the second one-way throttle valve (6). The port A of the first solenoid valve (35) is connected to the drive chamber of the first drive cylinder (31) through the first one-way throttle valve (5), so that the output end of the first drive cylinder (31) moves forward. The second action includes: The third solenoid valve (37) is adjusted to the left energized position. The air port P of the third solenoid valve (37) is connected to the return air chamber of the fourth drive cylinder (34) through the air port B. The drive air chamber of the fourth drive cylinder (34) is vented through the air port A of the third solenoid valve (37), so that the output end of the fourth drive cylinder (34) is retracted. The first solenoid valve (35) is adjusted to the right-side energized position. The drive chamber of the first drive cylinder (31) is vented from port A of the first solenoid valve (35) through the first one-way throttle valve (5). The port B of the first solenoid valve (35) is connected to the drive chamber of the second drive cylinder (32) through the second one-way throttle valve (6), causing the output end of the second drive cylinder (32) to move forward.

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