A belt deviation adjusting device

Abstract

The present invention discloses a belt deviation rectifying device, belonging to the technical field of industrial and mining, port production, which includes a hydraulic deviation rectifying system and a control system. The hydraulic deviation rectifying system is installed on the periphery of the belt conveyor and includes a deviation rectifying hydraulic cylinder and a deviation rectifying idler connected to the deviation rectifying hydraulic cylinder; the deviation rectifying idlers are located on both sides of the belt, and the deviation rectifying idlers are provided with notches; the control system includes a detection module and a controller. The present invention adds an external deviation rectifying device on the basis of the original belt conveyor, and uses the hydraulic deviation rectifying system to rectify the deviated belt without stopping the machine, with large and stable deviation rectifying force; the control system uses two protections of electromagnetic switches and limit switches to ensure timely deviation rectification when the belt runs off track, with high action sensitivity; the grooved belt deviation rectifying idler is used, and the belt is fastened by the notch after entering the notch, and the deviation rectification is carried out stably. It can be seen that the present invention has a compact structure, simple control, is convenient for maintenance, and has strong practicability.

Description

Technical Field

[0001] The present invention belongs to the technical field of industrial and mining, port production, and relates to a belt conveyor device, in particular to a belt deviation adjustment device applied to a belt conveyor device. Background Art

[0002] Belt conveyors are increasingly widely used in the field of industrial and mining production, and their advantages have been fully demonstrated in production. They not only improve production efficiency but also change the original production method. The greatest feature is that they have good continuity and low failure rate.

[0003] However, existing belt conveyors also have deficiencies. During operation, due to different sizes of site slopes for conveying materials and terrains with many curves, these are the main reasons for the belt to deviate. Currently, the main anti-deviation devices are mechanical anti-deviation devices and hydraulic anti-deviation devices. When the belt deviates, no matter which anti-deviation device it is, the belt conveyor needs to be stopped and the deviation is adjusted by maintenance personnel. This not only has a large workload and low maintenance efficiency but also is extremely likely to cause personal injuries during the deviation adjustment work, and there are many unsafe factors. Therefore, improving the anti-deviation device is the primary task for improving the safe operation of the belt conveyor and enhancing production efficiency, and it is also a problem that the present invention urgently needs to solve. Summary of the Invention

[0004] The purpose of the present invention is to provide a belt deviation adjustment device to solve the problems existing in the above-mentioned prior art. The belt deviation adjustment device adopts a dynamic real-time deviation adjustment system, which can adjust the deviated belt without stopping the machine, which is beneficial to improving the operation safety and production efficiency of the belt conveyor.

[0005] To achieve the above purpose, the present invention provides the following solution:

[0006] The present invention provides a belt deviation adjustment device, including:

[0007] A hydraulic deviation adjustment system, which is installed on the periphery of the belt conveyor and includes a deviation adjustment hydraulic cylinder and a deviation adjustment idler connected to the deviation adjustment hydraulic cylinder; the deviation adjustment idler is located on both sides of the belt, and a notch is provided on the deviation adjustment idler, and the notch is used to fix the side where the belt deviates when adjusting the deviated belt;

[0008] A control system, which includes a detection module and a controller. The detection module is used to detect whether the belt deviates, and both the detection module and the hydraulic deviation adjustment system are electrically connected to the controller; the controller is used to start the hydraulic deviation adjustment system when receiving and determining that the belt deviates, so as to adjust the deviated belt without stopping the machine.

[0009] Optionally, the hydraulic deviation rectification system is connected to a hydraulic pump through a hydraulic transmission system; the hydraulic transmission system includes a high-pressure hydraulic cylinder pipe and a solenoid valve arranged on the high-pressure hydraulic cylinder pipe, and the solenoid valve is electrically connected to the controller.

[0010] Optionally, the hydraulic deviation rectification system is configured on each layer of conveyor belt of the belt conveyor, and each hydraulic deviation rectification system is connected in parallel to the controller.

[0011] Optionally, the detection module is an electromagnetic switch, and the electromagnetic switch is arranged on the periphery of the belt; the controller is a PID controller.

[0012] Optionally, the electromagnetic switch includes an electromagnetic switch transmitting end and an electromagnetic switch receiving end, and the electromagnetic switch transmitting end and the electromagnetic switch receiving end are respectively arranged above and below the belt. Under normal circumstances, an electromagnetic wire is connected between the electromagnetic switch transmitting end and the electromagnetic switch receiving end. When the belt deviates, the magnetic force line between the electromagnetic switch transmitting end and the electromagnetic switch receiving end on the deviating side is cut off, and the electromagnetic switch transmits a cut-off signal to the controller, and the PID controller gives an instruction to start the hydraulic deviation rectification system.

[0013] Optionally, the detection module further includes a limit switch, and the limit switch is arranged on the periphery of the electromagnetic switch; the limit switch is electrically connected to the PID controller, and the limit switch, the electromagnetic switch and the PID controller form a PID control system.

[0014] Optionally, the limit switch includes a limit switch transmitting end and a limit switch receiving end, and the limit switch transmitting end and the limit switch receiving end are respectively arranged above and below the belt; the limit switch is used to start when the electromagnetic switch does not act, and when the magnetic force line between the limit switch transmitting end and the limit switch receiving end is cut off by the deviating belt, the PID controller gives an instruction to start the hydraulic deviation rectification system.

[0015] Optionally, the hydraulic deviation rectification system further includes a base, and the base is located on both sides of the belt conveyor, and the deviation rectification hydraulic cylinder is arranged on the base.

[0016] Optionally, the hydraulic deviation rectification systems are arranged in pairs, and each pair of hydraulic deviation rectification systems is symmetrically distributed on both sides of the belt.

[0017] Optionally, the notch is an arc-shaped inner groove. The arc shape can effectively avoid the wear of the belt by the deviation rectification idler. The deviation rectification idler also plays a role in fixing the belt entering the notch, so that after the hydraulic transmission system acts, the acting force of the notch on the belt can be concentrated on the reverse force of the belt, which is beneficial to improving the deviation rectification efficiency.

[0018] Optionally, the belt conveyor is equipped with an anti-deviation device, and the anti-deviation device is only used for starting up when the hydraulic deviation adjustment system and the control system both fail; under normal circumstances, the hydraulic deviation adjustment system adjusts the deviated belt without stopping the machine, and the adjustment is carried out before the anti-deviation device originally installed on the belt conveyor operates, effectively avoiding production stoppage caused by belt deviation.

[0019] The present invention has achieved the following technical effects compared with the prior art:

[0020] The belt deviation adjustment device proposed by the present invention is based on the original belt conveyor, and peripheral deviation adjustment devices are added on both sides of the belt conveyor. The present invention applies a hydraulic deviation adjustment system to adjust the deviated belt without stopping the machine, with large and stable deviation adjustment force; the PID control technology is used to control the actions of the hydraulic pump, hydraulic cylinder and solenoid valve of the hydraulic system, with high action sensitivity; two protections of electromagnetic switches and limit switches are used to ensure timely deviation adjustment when the belt deviates; the grooved belt deviation adjustment idler is used, and the belt is fastened by the groove after entering the groove, and the belt will not swing during pushing, and can be stably adjusted under the action of stable hydraulic pressure. It can be seen that the present invention has a compact structure, simple control, and is convenient for maintenance. It can be applied to production enterprises in mines, industries, chemical industries, etc. that have continuous conveying requirements for production materials during production. Especially in current coal mine production, the above belt deviation adjustment device can ensure the continuous conveying capacity of the belt conveyor and fundamentally solve the transportation problem in coal mine production. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0022] Figure 1 It is the overall installation schematic diagram of the belt deviation adjustment device of the present invention;

[0023] Figure 2 It is the structural schematic diagram of the hydraulic deviation adjustment system in the belt deviation adjustment device of the present invention;

[0024] Figure 3 It is the distribution schematic diagram of the electromagnetic switches in the belt deviation adjustment device of the present invention;

[0025] Figure 4 It is the distribution schematic diagram of the limit switches in the belt deviation adjustment device of the present invention;

[0026] Figure 5Schematic structural diagram of the belt conveyor in Embodiment 2;

[0027] Figure 6 Operation flowchart for simultaneous deviation adjustment of the upper and lower belts in Embodiment 2;

[0028] Among them, the reference numerals are: 1, upper deviation adjusting idler; 2, upper deviation adjusting idler shaft; 3, upper deviation adjusting idler bearing; 4, lower deviation adjusting idler; 5, high-pressure pipe of the upper hydraulic cylinder on one side; 6, upper belt; 7, upper idler; 8, upper deviation adjusting idler bracket; 9, upper hydraulic ejector rod; 10, upper hydraulic cylinder; 11, high-pressure pipe of the upper hydraulic cylinder on the other side; 12, lower hydraulic ejector rod; 13, lower hydraulic cylinder fixing seat; 14, lower hydraulic cylinder; 15, base; 16, high-pressure pipe of the lower hydraulic cylinder on one side; 17, high-pressure pipe of the lower hydraulic cylinder on the other side; 18, control solenoid valve of the upper hydraulic cylinder on the other side; 19, control solenoid valve of the lower hydraulic cylinder on the other side; 20, hydraulic pump; 21, control solenoid valve of the upper hydraulic cylinder on one side; 22, control solenoid valve of the lower hydraulic cylinder on one side; 23, lower idler; 24, lower belt; 25, connecting seat of the idler bracket and the hydraulic ejector rod; 26, upper hydraulic cylinder fixing seat; 27, lower deviation adjusting idler shaft; 28, transmitting end of the electromagnetic switch on one side; 29, receiving end of the electromagnetic switch on one side; 30, lower deviation adjusting idler bracket; 31, transmitting end of the electromagnetic switch on the other side; 32, receiving end of the electromagnetic switch on the other side; 33, electromagnetic switch fixing bracket; 34, upper belt limit switch on one side; 35, upper belt limit switch on the other side; 36, lower belt limit switch on one side 37, lower belt limit switch on the other side; 38, tensioning pulley; 39, driving drum; 40, coal bunker; 41, redirecting drum. Detailed implementation manners

[0029] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0030] The purpose of the present invention is to provide a belt deviation adjusting device, which adopts a dynamic real-time deviation adjusting system and can adjust the offset belt without stopping the machine, which is beneficial to improving the operation safety and production efficiency of the belt conveyor.

[0031] In order to make the above objects, features, and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation manners.

[0032] Embodiment 1

[0033] As Figures 1-4As shown in the figure, this embodiment provides a belt deviation rectifying device, which is an improvement on the original belt conveyor and adds peripheral deviation rectifying equipment. No changes are made to the interior of the belt conveyor, but only hydraulic deviation rectifying devices are added on both sides of the belt conveyor. The main components of the hydraulic deviation rectifying device include a PID control system and a hydraulic deviation rectifying system. The hydraulic deviation rectifying system includes a deviation rectifying hydraulic cylinder, which includes a hydraulic cylinder body and a hydraulic ejector rod slidably installed in the hydraulic cylinder body. The hydraulic cylinder is connected to a hydraulic pump (oil pump) through a high-pressure hydraulic cylinder pipe, and a solenoid valve is provided on the high-pressure hydraulic cylinder pipe. The PID control system mainly judges (detects) whether the belt is running normally through an electromagnetic switch during the belt startup. When the belt runs off track, the belt blocks the magnetic lines of force of the electromagnetic switch and transmits the signal to the PID controller. The PID controller gives an instruction to operate the hydraulic pump 20 to adjust the pressure of each hydraulic cylinder body, thereby driving the deviation rectifying idler to move to the side opposite to the belt deviation direction to rectify the deviated belt. When the belt is rectified, the magnetic lines of force of the electromagnetic switch are connected, the hydraulic deviation rectifying system and the hydraulic pump 20 stop working, and the belt runs normally. Among them, the deviation rectifying idler is fixed on the hydraulic ejector rod through a deviation rectifying idler bracket. A notch is opened in the middle of the deviation rectifying idler, and an arc-shaped inner groove is formed in the notch. The arc shape can effectively avoid the wear of the deviation rectifying idler on the belt. The deviation rectifying idler also plays a role in fixing the belt entering the notch, so that after the hydraulic deviation rectifying system acts, the acting force on the belt can be concentrated on the reverse force of the belt, improving the deviation rectifying efficiency.

[0034] In this embodiment, as Figure 4 shown, the PID control system is also provided with a limit switch. When the electromagnetic switch of the deviation rectifying device does not act and the belt continues to deviate, it will touch the limit switch, thereby triggering the hydraulic deviation rectifying system. The two deviation rectifying controls greatly improve the reliability of the belt operation.

[0035] In this embodiment, belt deviation rectifying devices are installed on both outer sides of the belt conveyor, and the belt deviation rectifying devices on both sides are preferably arranged symmetrically in pairs. Bases 15 are provided on both outer sides of the belt conveyor, and the deviation rectifying hydraulic cylinders are installed on the bases 15 through hydraulic cylinder bases.

[0036] It can be seen that the belt deviation rectifying device proposed in this embodiment can rectify the deviated belt without stopping the machine by applying a hydraulic deviation rectifying system, with large and stable deviation rectifying force; the actions of the hydraulic pump, hydraulic cylinder and solenoid valve of the hydraulic system are controlled by using PID control technology, with high action sensitivity; two protections of electromagnetic switch and limit switch are used to ensure timely deviation rectification when the belt runs off track; by using the grooved belt deviation rectifying idler, the belt is fastened by the notch after entering the notch, and the belt will not swing during pushing, and the deviation rectification can be stably carried out under the action of stable hydraulic pressure. The structure of the present invention is compact, the control is simple, and it is convenient for maintenance. It can be applied to production enterprises with continuous conveying requirements for production materials in mines, industries, chemical industries and other fields. Especially in current coal mine production, the above belt deviation rectifying device can ensure the continuous conveying capacity of the belt conveyor and fundamentally solve the transportation problem in coal mine production.

[0037] Embodiment 2

[0038] To improve the effectiveness of deviation rectification, the hydraulic deviation rectifying devices described in Embodiment 1 can be provided on each layer of the belt of the belt conveyor. As Figure 5 shown, a belt conveyor may include a frame, a driving roller 39 and a redirecting roller 41. The belt is wound between the driving roller 39 and the redirecting roller 41. The part above the roller is the upper belt 6, and the part below the roller is the lower belt 24. A tensioning pulley 38 is also provided on the lower belt 24. Upper idlers 7 and lower idlers 23 are respectively provided below the upper belt 6 and the lower belt 24. A coal bunker 40 is provided on one side of the driving roller 39, and the coal is conveyed under the drive of the driving roller 39 and the redirecting roller 41. In this embodiment, hydraulic deviation rectifying devices are configured for both the above-mentioned upper belt 6 and lower belt 24, and the specific installation method is as follows.

[0039] As Figures 1-5 shown, the hydraulic deviation rectifying device includes an upper hydraulic deviation rectifying system and a lower hydraulic deviation rectifying system, and the upper hydraulic deviation rectifying system and the lower hydraulic deviation rectifying system are connected in parallel to a PID control system. Bases 15 are symmetrically arranged on both sides of the frame of the belt conveyor. The upper hydraulic deviation rectifying system is arranged on the top of each base 15, and the lower hydraulic deviation rectifying system is arranged in the middle. Among them:

[0040] The upper hydraulic deviation adjustment system includes an upper hydraulic cylinder 10. An upper hydraulic ejector rod 9 is arranged inside the cylinder body of the upper hydraulic cylinder 10. The upper hydraulic cylinder 10 is fixed to the top end of the base 15 through an upper hydraulic cylinder fixing seat 26. An upper deviation adjustment idler frame 8 is arranged on the upper hydraulic ejector rod 9. The upper deviation adjustment idler 1 is installed on the upper deviation adjustment idler frame 8 through an upper deviation adjustment idler shaft 2, and an upper deviation adjustment idler bearing 3 is arranged between the upper deviation adjustment idler shaft 2 and the upper deviation adjustment idler frame 8. The upper hydraulic cylinder 10 on one (left) side is connected to a hydraulic pump 20 through a one-side upper hydraulic cylinder high-pressure pipe 5, and the upper hydraulic cylinder 10 on the other (right) side is connected to the hydraulic pump 20 through a the-other-side upper hydraulic cylinder high-pressure pipe 11. A one-side upper hydraulic cylinder control solenoid valve 21 and a the-other-side upper hydraulic cylinder control solenoid valve 18 are respectively arranged on the one-side upper hydraulic cylinder high-pressure pipe 5 and the the-other-side upper hydraulic cylinder high-pressure pipe 11. Both solenoid valves are electrically connected to the PID controller of the PID control system.

[0041] The lower hydraulic deviation adjustment system includes a lower hydraulic cylinder 14. A lower hydraulic ejector rod 12 is arranged inside the cylinder body of the lower hydraulic cylinder 14. The lower hydraulic cylinder 14 is fixed to the inner side of the middle part of the base 15 through a lower hydraulic cylinder fixing seat 13. A lower deviation adjustment idler frame 30 is arranged on the lower hydraulic ejector rod 12. The lower deviation adjustment idler 4 is installed on the lower deviation adjustment idler frame 30 through a lower deviation adjustment idler shaft 27, and an upper deviation adjustment idler bearing is arranged between the lower deviation adjustment idler shaft 27 and the lower deviation adjustment idler frame 30. The lower hydraulic cylinder 14 on one (left) side is connected to the hydraulic pump 20 through a one-side lower hydraulic cylinder high-pressure pipe 16, and the lower hydraulic cylinder 14 on the other (right) side is connected to the hydraulic pump 20 through a the-other-side lower hydraulic cylinder high-pressure pipe 17. A one-side lower hydraulic cylinder control solenoid valve 22 and a the-other-side lower hydraulic cylinder control solenoid valve 19 are respectively arranged on the one-side lower hydraulic cylinder high-pressure pipe 16 and the the-other-side lower hydraulic cylinder high-pressure pipe 17. Both solenoid valves are electrically connected to the PID controller of the PID control system.

[0042] The PID control system includes a PID controller, an electromagnetic switch and a limit switch. The electromagnetic switch is arranged on an electromagnetic switch fixing frame 33 on the periphery of the belt, and the limit switch is arranged on the periphery of the electromagnetic switch. In this embodiment, electromagnetic switches and limit switches are arranged on both sides of the upper and lower belts. As Figure 3 shown, one-side electromagnetic switch includes a one-side electromagnetic switch transmitting end 28 and a one-side electromagnetic switch receiving end 29 arranged above the belt; the other-side electromagnetic switch includes a the-other-side electromagnetic switch transmitting end 31 and a the-other-side electromagnetic switch receiving end 32 arranged above the belt. As Figure 4 shown, the limit switch includes a one-side upper belt limit switch 34, a the-other-side upper belt limit switch 35, a one-side lower belt limit switch 36 and a the-other-side lower belt limit switch 37.

[0043] In this embodiment, as Figure 2 shown, the idler frames are all installed on the corresponding hydraulic ejector rods through idler frame and hydraulic ejector rod connection seats 25.

[0044] In this embodiment, whichever of the upper and lower belts touches the deviation adjustment system first will be activated first. If the upper and lower belts touch the deviation adjustment system at the same time, both the upper and lower hydraulic deviation adjustment systems will be activated, and the deviation adjustment force will be greater and the deviation adjustment speed will be faster. In particular, the effect is more obvious for belt conveyors with long distances and large loads. The specific technical description is as follows:

[0045] like Figure 6 As shown, when one side of the upper and lower belts deviates at the same time, the magnetic lines of force of the electromagnetic switch transmitting end 28 on one side and the electromagnetic switch receiving end 29 on the other side are cut off by the deviated belt, and the PID controller gives a command to start the hydraulic pump 20, and at the same time opens the upper hydraulic cylinder control electromagnetic valve 21 on one side and the lower hydraulic cylinder control electromagnetic valve 22 on one side, and the upper hydraulic cylinder 10 and the lower hydraulic cylinder 14 act at the same time, pushing the upper deflection adjustment roller 1 and the lower deflection adjustment roller 4 to push the upper belt 6 and the lower belt 24 at the same time. When the belt is adjusted, the electromagnetic switch returns to normal, and at this time, each hydraulic push rod is automatically retracted to prepare for the next operation. When the hydraulic push rod returns to its original position, the hydraulic pump 20 stops working. On the contrary, if the belt on the other side deviates, the component action process of the upper hydraulic cylinder control electromagnetic valve 18 on the other side and the lower hydraulic cylinder control electromagnetic valve 19 on the other side is the same as the above-mentioned one-side deflection adjustment operation process, which will not be repeated here. When the electromagnetic switch fails, the upper belt 6 and the lower belt 24 continue to deviate, and at this time, the upper belt limit switch 34 on one side and the lower belt limit switch 36 on one side are triggered, and the hydraulic pump 20 is started at the same time. The deviation adjustment process is consistent with the deviation adjustment process on one side of the electromagnetic switch action, which will not be repeated here. If the electromagnetic switch and the limit switch fail at the same time, the deviation protection system built into the belt conveyor is finally started, and the machine is stopped for maintenance; the electromagnetic switch and hydraulic deviation adjustment system, the limit switch and hydraulic deviation adjustment system of this embodiment are both dynamic deviation adjustment without stopping the machine.

[0046] It can be seen that the belt deviation adjustment device proposed in this embodiment can not only adjust the deviation of the upper and lower belts at the same time, but also adjust the offset belt without stopping the machine. It is a dynamic real-time deviation adjustment system, and the deviation is adjusted before the original anti-deviation device on the belt conveyor is activated, thereby effectively avoiding production stoppage caused by belt deviation. The hydraulic deviation adjustment system is installed close to the belt frame through the base, which effectively avoids the difficulties in equipment installation, maintenance and repair caused by small space. This embodiment also has the following advantages:

[0047] (1) The hydraulic adjustment system is used for adjustment, which has strong and stable adjustment force;

[0048] (2) Use PID control technology to control the action of hydraulic pumps, hydraulic cylinders and solenoid valves, with high action sensitivity;

[0049] (3) Use electromagnetic switch and limit switch as two protections to ensure that the belt can be adjusted in time when it deviates;

[0050] (4) By using a grooved belt deviation - adjusting idler, when the belt enters the groove opening, it is fastened by the groove opening and will not cause the belt to swing during pushing. It can be adjusted stably under the action of a stable hydraulic pressure.

[0051] (5) It has a compact structure, simple control, and is convenient for maintenance.

[0052] It should be noted that for those skilled in the art, it is obvious that the present invention is not limited to the details of the above - mentioned exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non - restrictive. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention, and any reference signs in the claims should not be regarded as limiting the claims involved.

[0053] Specific examples are used in the present invention to elaborate on the principle and implementation mode of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation mode and application scope. In summary, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A belt deviation rectifying device, characterized in that, it includes: a hydraulic deviation rectifying system, which is installed on the periphery of the belt conveyor and includes a deviation rectifying hydraulic cylinder and a deviation rectifying idler connected to the deviation rectifying hydraulic cylinder; the deviation rectifying idlers are located on both sides of the belt, and a notch is provided on the deviation rectifying idler, and the notch is used to fix the side where the belt deviates when adjusting the deviated belt; the notch is an arc-shaped inner groove; a control system, which includes a detection module and a controller. The detection module is used to detect whether the belt deviates. Both the detection module and the hydraulic deviation rectifying system are electrically connected to the controller; the controller is used to start the hydraulic deviation rectifying system when receiving and determining that the belt deviates, so as to rectify the deviated belt without stopping the machine; the detection module includes an electromagnetic switch and a limit switch. The electromagnetic switch is arranged on the periphery of the belt, the controller is a PID controller, the limit switch is arranged on the periphery of the electromagnetic switch, and the limit switch is electrically connected to the PID controller.

2. The belt deviation rectifying device according to claim 1, characterized in that, the hydraulic deviation rectifying system is connected to a hydraulic pump through a hydraulic transmission system; the hydraulic transmission system includes a hydraulic cylinder high-pressure pipe and a solenoid valve arranged on the hydraulic cylinder high-pressure pipe.

3. The belt deviation rectifying device according to claim 1, characterized in that, the hydraulic deviation rectifying system is configured on each layer of conveyor belt of the belt conveyor.

4. The belt deviation rectifying device according to claim 1, characterized in that, the electromagnetic switch includes an electromagnetic switch transmitting end and an electromagnetic switch receiving end. The electromagnetic switch transmitting end and the electromagnetic switch receiving end are respectively arranged above and below the belt. When the magnetic lines of force between the electromagnetic switch transmitting end and the electromagnetic switch receiving end are cut off by the deviated belt, the PID controller gives an instruction to start the hydraulic deviation rectifying system.

5. The belt deviation rectifying device according to claim 1, characterized in that, the limit switch includes a limit switch transmitting end and a limit switch receiving end. The limit switch transmitting end and the limit switch receiving end are respectively arranged above and below the belt; the limit switch is used to start when the electromagnetic switch does not act, and when the magnetic lines of force between the limit switch transmitting end and the limit switch receiving end are cut off by the deviated belt, the PID controller gives an instruction to start the hydraulic deviation rectifying system.

6. The belt deviation rectifying device according to claim 1, characterized in that, the hydraulic deviation rectifying system further includes a base, and the deviation rectifying hydraulic cylinder is arranged on the base.

7. The belt deviation rectifying device according to claim 1, characterized in that, the hydraulic deviation rectifying systems are arranged in pairs, and each pair of hydraulic deviation rectifying systems are symmetrically distributed on both sides of the belt.

Images