Large-dip-angle lower conveying belt conveyor with galloping prevention function and automatic control method

Abstract

The invention belongs to the technical field of mine belt conveying, and discloses a large-dip-angle downward conveying belt conveyor with an anti-galloping function and an automatic control method.The large-dip-angle downward conveying belt conveyor comprises an upper-section belt area, a slope changing area and a lower-section belt area, and the upper-section belt area and the lower-section belt area are arranged on the upper side and the lower side of the slope changing area correspondingly; the end part of the upper-section belt area is provided with a turn-back end, the end part of the lower-section belt area is provided with an unloading end, the top end of the upper-section belt area is provided with an upper driving mechanism, and the upper driving mechanism comprises a first driving roller, a second driving roller, a third driving roller, a first guide roller, a first turn-back roller and a second turn-back roller. By optimizing an equipment control system, a driving device is more effectively controlled, the tensile force is adjusted in time, the input time of a braking device is reasonably controlled, the performance of all equipment is fully played, and it is ensured that galloping is controllable under different operation working conditions.

Description

Technical Field

[0001] The invention belongs to the technical field of mine belt transportation, and in particular relates to a large-inclination-angle transportation belt conveyor with an anti-runaway function and an automatic control method. Background Art

[0002] During the operation of the steeply inclined downward conveyor belt, the system is often in power generation mode. When the downward force generated by the load on the belt conveyor is balanced with various resistances and braking forces, the belt conveyor is in a stable operating state. If the belt speed continues to increase, the belt conveyor will enter a flying state, causing belt overlap, damage to the belt frame, material spillage, blocking the lane and burying the machine head, etc., leading to safety accidents. When the heavy-loaded car stops, the raw coal remaining on the belt will generate a large downward force, forcing the belt to slide down, which is very likely to cause major safety accidents such as belt breakage and flying.

[0003] In the prior art, the flying phenomenon of the steeply inclined downward belt conveyor has always been a problem that troubles transportation safety and has not been well solved. Once the flying phenomenon occurs, it will cause equipment damage, affect production efficiency, and even endanger the life safety of the staff. Summary of the invention

[0004] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a conveyor belt conveyor with a large inclination angle and an automatic control method with an anti-runaway function, thereby solving the runaway problem in the prior art.

[0005] The object of the present invention can be achieved by the following technical scheme: a large-angle downward conveying belt conveyor with anti-flying function, comprising an upper belt area, a slope-changing area and a lower belt area;

[0006] The upper belt zone and the lower belt zone are respectively arranged on the upper and lower sides of the slope change area, the end of the upper belt zone is provided with a return end, the end of the lower belt zone is provided with an unloading end, and the top of the upper belt zone is provided with an upper driving mechanism, the upper driving mechanism includes a first driving roller, a second driving roller, a third driving roller, a first guide roller, a first return roller and a second return roller.

[0007] In some disclosures, the lower belt zone is provided with a second guide roller, a third guide roller, a third folding roller, a fourth folding roller and a fifth folding roller.

[0008] In some disclosures, the driving devices in the first driving roller, the second driving roller and the third driving roller adopt variable frequency permanent magnet synchronous motors and are controlled by variable frequency.

[0009] In some disclosures, a conveyor body is arranged below the slope change area, and an anti-flying combination roller is installed on the top of the conveyor body. The anti-flying combination roller includes an outer roller group, an inner roller group, an inner mounting groove and a horizontal roller. The anti-flying combination roller increases the deep groove angle of the roller, and changes the outer roller group from a 35° triple groove type roller group to a 60° quadruple deep groove type roller group. The horizontal installation angle of the outer roller group is 60°, and the inner roller group is installed at an angle of 20° to the horizontal plane, so that the inner mounting groove of the inner roller group is 40°.

[0010] In some disclosures, a cleaning assembly is installed at the bottom of the conveyor body, and the cleaning assembly includes a mounting plate, a fixing box is installed at the bottom of the mounting plate, connecting plates are installed on the outer walls on both sides of the mounting plate, and mounting screw holes are opened on the top of the connecting plates.

[0011] In some disclosures, a motor is installed on the inner bottom wall of the fixed box, a reciprocating screw is installed on the output end of the motor, a lifting block is installed on the outer wall of the reciprocating screw through a thread, and two connecting rods are installed on the outer wall of the lifting block.

[0012] In some disclosures, two lifting columns are installed through the top of the fixed box, lifting springs are installed around the outer walls of the lifting columns, a cleaning plate is installed on the top of the lifting columns, a plurality of fixing holes are opened on the top of the cleaning plate, and a plurality of scrapers are installed on the top of the cleaning plate.

[0013] In some disclosures, a rotating shaft is installed through the outer wall of the cleaning plate, a trigger rod is installed at one end of the rotating shaft, a torsion spring is installed around the outer wall of the rotating shaft, and a first gear is installed at one end of the rotating shaft.

[0014] In some disclosures, the inner wall of the cleaning plate is installed with a fixed groove, and the inner walls at both ends of the fixed groove are installed with adjusting springs, and a movable plate is installed at one end of the adjusting spring. A gear groove is opened on the top of the movable plate, and the gear groove is meshed with gear No. 1. A connecting block is installed on the outer wall of the movable plate, and a plurality of cleaning rods are installed on the outer wall of the connecting block.

[0015] An automatic control method for a conveying belt conveyor at a large inclination angle with an anti-runaway function, the control method for the conveying belt conveyor is as follows;

[0016] S1. Optimize the startup procedure. Before starting, give the permanent magnet motor a low-frequency startup signal to allow the motor to output a certain torque. The friction generated by the roller and the belt is greater than the sum of the running resistance of the upper and lower branches of the belt, preventing the belt from sliding down and running away during heavy-load startup.

[0017] S2. Optimize the anti-"runaway" control program. Add a shaft encoder to the main shaft of the drive device to collect speed. The control system compares the belt speed with the drive device speed to determine whether the belt has an overspeed trend. Once an overspeed trend is detected, the control system promptly controls the brake device to adopt a brake-sticking operation mode to increase the braking force. The tensioning device quickly tensions, and adjusts the positions of the third guide roller, the third return roller, and the fourth return roller by adjusting the relative position of the first guide roller and the first return roller, and the distance between the first return roller and the second return roller to adjust the tightness of the belt. For example, move the first guide roller The position of the belt can be adjusted roughly upward or the first folding roller can be adjusted to the right and the second folding roller can be adjusted to the left to reduce the distance between the two, so that the belt can be tightened as a whole, thereby increasing the friction between the belt and the driving roller. Otherwise, the belt will be loose as a whole. The hydraulic damping device is automatically put into operation to increase the friction between the belt and the damping device, and at the same time, the upper conveyor belt is stopped from conveying coal. The above measures increase the external braking force of the belt and slow down the belt. After the running speed of the belt is less than the critical speed of the flying car, the external braking forces are released one by one, so that the belt conveyor runs at the rated speed.

[0018] S3. Optimize the parking control program. In normal parking, first give the permanent magnet motor a frequency reduction signal to run at a low speed. After the brake device and tensioning device stop, the inverter controls the motor to stop working. In abnormal parking, the belt conveyor control system will use a fast brake to reduce the impact and damage to the belt.

[0019] The nouns, conjunctions or adjectives involved in the above technical solution are explained as follows:

[0020] A fixed connection is one where the parts or components are fixed without any relative movement;

[0021] A rotational connection is a connection between parts that allows the parts to rotate relative to each other;

[0022] Threaded connection is a detachable fixed connection with the advantages of simple structure, reliable connection, and convenient assembly and disassembly. It is widely used in the fields of mechanical engineering and connection structures.

[0023] A sliding connection is a connection between parts that allows the parts to slide against each other.

[0024] Beneficial effects of the present invention:

[0025] 1. The present invention optimizes the equipment control system, controls the driving device more effectively, adjusts the tensioning force in time, reasonably controls the braking device input time, gives full play to the performance of each device, and ensures that the "flying car" can be controlled under different operating conditions.

[0026] 2. The present invention can clean up the adhered debris during the conveying process of the conveyor belt by setting a cleaning component. The scraper contacts the conveyor belt, thereby scraping off the coal slime or other attachments adhered to the conveyor belt. The scraped debris falls into the interior of the cleaning plate through the fixed hole, which is convenient for collecting the debris. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0028] Figure 1 2 is a front view of the structure of the anti-flying composite roller according to an embodiment of the present invention;

[0029] Figure 2 1 is a side schematic diagram of an anti-flying combined roller according to an embodiment of the present invention;

[0030] Figure 3 1 is a side schematic diagram of an anti-flying combined roller according to an embodiment of the present invention;

[0031] Figure 4 1 is a schematic diagram of the front and side structure of the enhanced anti-flying composite roller according to an embodiment of the present invention;

[0032] Figure 5 is a partial structural schematic diagram of a cleaning component according to an embodiment of the present invention;

[0033] Figure 6 is a schematic cross-sectional structure diagram of a cleaning component according to an embodiment of the present invention;

[0034] Figure 7 is a schematic structural diagram of a cleaning plate according to an embodiment of the present invention;

[0035] Figure 8 is a schematic diagram of the cross-sectional structure of a cleaning plate according to an embodiment of the present invention;

[0036] Fig. 9 It is a control system optimization flow chart of an embodiment of the present invention.

[0037] In the figure: 1, upper belt area; 1a, return end; 11, first drive roller; 12, second drive roller; 13, third drive roller; 14, first guide roller; 15, first return roller; 16, second return roller; 2, slope change area; 3, lower belt area; 3a, unloading end; 31, second guide roller; 32, third guide roller; 33, third return roller; 34, fourth return roller; 35, fifth return roller; 40, conveyor body; 41, outer roller group; 42, inner roller group; 4 3. Inner mounting groove; 44. Horizontal roller; 5. Cleaning assembly; 50. Fixed box; 51. Mounting plate; 52. Connecting piece; 53. Mounting screw hole; 6. Motor; 61. Reciprocating screw rod; 62. Lifting block; 63. Connecting rod; 7. Lifting column; 71. Lifting spring; 72. Cleaning plate; 73. Fixed hole; 74. Scraper; 8. Rotating shaft; 81. Trigger rod; 82. Torsion spring; 83. Gear No. 1; 84. Fixed groove; 85. Adjustment spring; 86. Moving plate; 87. Connecting block; 88. Cleaning rod. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 and Fig. 9A high-inclination downward conveying belt conveyor with an anti-runaway function comprises an upper belt zone 1, a slope-changing zone 2 and a lower belt zone 3, wherein the upper belt zone 1 and the lower belt zone 3 are respectively arranged on the upper and lower sides of the slope-changing zone 2, the end of the upper belt zone 1 is provided with a return end 1a, the end of the lower belt zone 3 is provided with an unloading end 3a, the top of the upper belt zone 1 is provided with an upper driving mechanism, the upper driving mechanism comprises a first driving roller 11, a second driving roller 12, a third driving roller 13, a first guide roller 14, a first return roller 15 and a second return roller 16, the lower belt zone 3 is provided with a second guide roller 31, a third guide roller 32, a third return roller 33, a fourth return roller 34 and a fifth return roller The return roller 35, the driving devices in the first drive roller 11, the second drive roller 12, and the third drive roller 13 adopt variable frequency permanent magnet synchronous motors, which are controlled by variable frequency. A conveyor body 40 is arranged below the slope change area 2, and a flying prevention combination roller is installed on the top of the conveyor body 40. The flying prevention combination roller includes an outer roller group 41, an inner roller group 42, an inner mounting groove 43 and a horizontal roller 44. The flying prevention combination roller increases the deep groove angle of the roller, and changes the outer roller group 41 from a 35° triple groove roller group to a 60° quadruple deep groove roller group. The horizontal installation angle of the outer roller group 41 is 60°, and the inner roller group 42 is installed at an angle of 20° with the horizontal plane, so that the inner mounting groove 43 of the inner roller group 42 is 40°.

[0040] Specifically, the drive devices in the first drive roller 11, the second drive roller 12, and the third drive roller 13 adopt variable frequency permanent magnet synchronous motors, which replace the previous arrangement of motors, reducers, and frequency converters. Through variable frequency control, the synchronization between multiple drive devices is improved. At the same time, the efficiency of permanent magnet synchronous motors is higher and more stable than that of asynchronous motors, making the load distribution of equipment more uniform, which has the advantages of improving transmission efficiency, reducing accident rate, reducing maintenance labor intensity, saving installation space, and saving energy and reducing consumption.

[0041] It should be noted that the anti-flying combined roller is to increase the deep groove angle of the roller, and change the upper roller group from a 35° triple groove roller group to a 60° quadruple deep groove roller group, such as Figure 3 The roller groups shown are arranged in different planes. The horizontal installation angle of the outer roller group 41 is 60°, and the inner roller group 42 is installed at an angle of 20° to the horizontal plane, so that the inner installation groove 43 of the inner roller group 42 is 40°. The structure of roller optimization B is further obtained on the basis of roller optimization A, as shown in FIG. Figure 4As shown, by further optimizing the outer mounting bracket of the outer roller group 41, a horizontal roller 44 is installed on the outer mounting bracket. Therefore, the design optimization will improve the gathering of the belt, increase the contact area between the belt and the roller, thereby increasing the friction between the belt and the roller, increase the contact area between the belt and the material, increase the stability of the material during operation, and reduce the accumulation of materials and accidents of pushing the frame caused by the sliding of the material during the braking process. The anti-flying composite roller is installed in the entire conveyor belt area, and the enhanced anti-flying composite roller is installed at the upper and lower turning points of the slope changing zone 2 to prevent the belt from flying out of the conveyor when the slope changing zone 2 changes with the upper belt zone 1 and the lower belt zone 3 during empty transmission. The enhanced anti-flying composite roller is not only installed in this area, but can be installed in other areas according to specific circumstances.

[0042] See also Figure 5 , Figure 6 and Figure 7 A cleaning assembly 5 is installed at the bottom of the conveyor body 40. The cleaning assembly 5 includes a mounting plate 51, a fixed box 50 is installed at the bottom of the mounting plate 51, connecting plates 52 are installed on the outer walls of both sides of the mounting plate 51, and mounting screw holes 53 are opened on the top of the connecting plates 52. A motor 6 is installed on the inner bottom wall of the fixed box 50, and a reciprocating screw rod 61 is installed on the output end of the motor 6. A lifting block 62 is installed on the outer wall of the reciprocating screw rod 61 through a thread, and two connecting rods 63 are installed on the outer wall of the lifting block 62. Two lifting columns 7 are installed through the top of the fixed box 50, and a lifting spring 71 is installed around the outer wall of the lifting column 7. A cleaning plate 72 is installed on the top of the lifting column 7, and a plurality of fixing holes 73 are opened on the top of the cleaning plate 72. A plurality of scrapers 74 are installed on the top of the cleaning plate 72.

[0043] Specifically, firstly, the mounting plate 51 is fitted with the bottom of the conveyor body 40, and then the fixing bolts are inserted into the mounting screw holes 53 to fix the fixing box 50 to the bottom of the conveyor body 1. Then, when the conveyor belt of the conveyor needs to be cleaned, the motor 6 drives the reciprocating screw 61 to rotate, and the reciprocating screw 61 rotates to drive the lifting block 62 to rise or fall. The lifting block 62 rises to drive the connecting rod 63 and the lifting column 7 to rise, and then the cleaning plate 72 on the top of the lifting column 7 contacts the conveyor belt of the conveyor to achieve the cleaning function;

[0044] It should be noted that the lifting spring 71 can facilitate the lifting column 7 to return to its original position, and the scraper 74 contacts the conveyor belt, thereby scraping off the coal slime or other attachments adhering to the conveyor belt, and the scraped debris falls into the interior of the cleaning plate 72 through the fixed hole 73, making it convenient to collect the debris.

[0045] See also Figure 7 and Figure 8A rotating shaft 8 is installed through the outer wall of the cleaning plate 72, a trigger rod 81 is installed at one end of the rotating shaft 8, a torsion spring 82 is installed around the outer wall of the rotating shaft 8, a No. 1 gear 83 is installed at one end of the rotating shaft 8, a fixing groove 84 is installed on the inner wall of the cleaning plate 72, and an adjusting spring 85 is installed on the inner walls of both ends of the fixing groove 84, and a moving plate 86 is installed at one end of the adjusting spring 85, a gear groove is opened on the top of the moving plate 86, and the gear groove is meshed with the No. 1 gear 83, a connecting block 87 is installed on the outer wall of the moving plate 86, and a plurality of cleaning rods 88 are installed on the outer wall of the connecting block 87.

[0046] It should be noted that when the cleaning plate 72 is close to the conveyor belt, the height of the trigger rod 81 is the same as that of the scraper 74. At this time, the debris that has not been scraped by the scraper 74 will first contact the trigger rod 81, and the trigger rod 81 will rotate when hit, and the trigger rod 81 drives the rotating shaft 8 to rotate, and the rotating shaft 8 drives the No. 1 gear 83 to rotate, and the No. 1 gear 83 meshes with the gear groove, thereby driving the moving plate 86 to move through the gear groove. At this time, the two adjustment springs 85 in the fixed groove 84 are retracted to facilitate the movement of the moving plate 86, and the movement of the moving plate 86 drives the connecting block 87 and the cleaning rod 88 to move;

[0047] It should be noted that when debris falls into the interior of the cleaning plate 72 through the fixing hole 73, in order to prevent the debris from accumulating inside the cleaning plate 72, the debris is moved by moving the cleaning rod 88, so that the debris adheres to the inner wall of the cleaning plate 72, thereby achieving the cleaning function.

[0048] An automatic control method for a conveying belt conveyor at a large inclination angle with an anti-runaway function, the control method for the conveying belt conveyor is as follows;

[0049] S1. Optimize the startup procedure. Before starting, give the permanent magnet motor a low-frequency startup signal to allow the motor to output a certain torque. The friction generated by the roller and the belt is greater than the sum of the running resistance of the upper and lower branches of the belt, preventing the belt from sliding down and running away during heavy-load startup.

[0050] S2. Optimize the anti-"runaway" control program. Add an axis encoder to the main shaft of the drive device to collect speed. The control system determines whether the belt has an overspeed trend by comparing the belt speed with the drive device speed. Once an overspeed trend is detected, the control system promptly controls the brake device to adopt the brake operation mode to increase the braking force; the tensioning device is quickly tensioned, and the relative position of the first guide roller 14 and the first return roller 15 and the distance between the first return roller 15 and the second return roller 16 are adjusted to adjust the position of the third guide roller 32, the third return roller 33, and the fourth return roller 34 to adjust the tightness of the belt. For example, the first return roller 14 is adjusted to the first return roller 15. The position of the guide roller 14 is adjusted upward or the first return roller 15 is adjusted to the right and the second return roller 16 is adjusted to the left to reduce the distance between the two, so that the belt can be tightened as a whole, thereby increasing the friction between the belt and the driving roller. Otherwise, the belt will be loose as a whole. The hydraulic damping device is automatically engaged to increase the friction between the belt and the damping device, and the upper conveyor belt is stopped from conveying coal. The above measures increase the external braking force of the belt and slow down the belt. When the running speed of the belt is less than the critical speed of the flying car, the external braking force is released one by one, so that the belt conveyor runs at the rated speed.

[0051] S3. Optimize the parking control program. In normal parking, first give the permanent magnet motor a frequency reduction signal to run at a low speed. After the brake device and tensioning device stop, the inverter controls the motor to stop working. In abnormal parking, the belt conveyor control system will use a fast brake to reduce the impact and damage to the belt.

[0052] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0053] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A large-angle down-conveying belt conveyor with anti-runaway function, characterized in that: It includes an upper belt area (1), a slope change area (2) and a lower belt area (3); The upper belt section (1) and the lower belt section (3) are respectively arranged on the upper side and the lower side of the slope changing area (2); the end of the upper belt section (1) is provided with a folding end (1a); the end of the lower belt section (3) is provided with an unloading end (3a); the top of the upper belt section (1) is provided with an upper driving mechanism, and the upper driving mechanism comprises a first driving roller (11), a second driving roller (12), a third driving roller (13), a first guide roller (14), a first folding roller (15) and a second folding roller (16).

2. The large-angle downward conveying belt conveyor with anti-runaway function according to claim 1 is characterized in that: The lower belt zone (3) is provided with a second guide roller (31), a third guide roller (32), a third folding roller (33), a fourth folding roller (34) and a fifth folding roller (35).

3. The large-angle downward conveying belt conveyor with anti-runaway function according to claim 1 is characterized in that: The driving devices in the first driving roller (11), the second driving roller (12) and the third driving roller (13) adopt variable frequency permanent magnet synchronous motors and are controlled by frequency conversion.

4. The large-angle downward conveying belt conveyor with anti-runaway function according to claim 1 is characterized in that: A conveyor body (40) is arranged below the slope changing area (2), and an anti-flying composite roller is installed on the top of the conveyor body (40), the anti-flying composite roller comprises an outer roller group (41), an inner roller group (42), an inner mounting groove (43) and a horizontal roller (44), and the anti-flying composite roller increases the deep groove angle of the roller, and the outer roller group (41) is changed from a 35° triple groove type roller group to a 60° quadruple deep groove type roller group, the horizontal installation angle of the outer roller group (41) is 60°, and the inner roller group (42) is installed at an angle of 20° with the horizontal plane, so that the inner mounting groove (43) of the inner roller group (42) is 40°.

5. The large-angle downward conveying belt conveyor with anti-runaway function according to claim 4 is characterized in that: A cleaning assembly (5) is installed at the bottom of the conveyor body (40), and the cleaning assembly (5) includes a mounting plate (51) installed at the bottom of the mounting plate (51), and a fixing box (50) is installed at the bottom of the mounting plate (51), and connecting plates (52) are installed on the outer walls of both sides of the mounting plate (51), and the top of the connecting plate (52) is provided with a mounting screw hole (53).

6. The large-angle downward conveying belt conveyor with anti-runaway function according to claim 5 is characterized in that: A motor (6) is installed on the inner bottom wall of the fixed box (50), a reciprocating screw rod (61) is installed on the output end of the motor (6), a lifting block (62) is installed on the outer wall of the reciprocating screw rod (61) through a thread, and two connecting rods (63) are installed on the outer wall of the lifting block (62).

7. The large-angle downward conveying belt conveyor with anti-runaway function according to claim 6 is characterized in that: Two lifting columns (7) are installed through the top of the fixed box (50), and a lifting spring (71) is installed around the outer wall of the lifting column (7). A cleaning plate (72) is installed on the top of the lifting column (7), and a plurality of fixing holes (73) are opened on the top of the cleaning plate (72). A plurality of scrapers (74) are installed on the top of the cleaning plate (72).

8. The large-angle downward conveying belt conveyor with anti-runaway function according to claim 7 is characterized in that: A rotating shaft (8) is installed through the outer wall of the cleaning plate (72), a trigger rod (81) is installed at one end of the rotating shaft (8), a torsion spring (82) is installed around the outer wall of the rotating shaft (8), and a first gear (83) is installed at one end of the rotating shaft (8).

9. The large-angle downward conveying belt conveyor with anti-runaway function according to claim 8, characterized in that: The inner wall of the cleaning plate (72) is provided with a fixed groove (84), the inner walls at both ends of the fixed groove (84) are provided with adjustment springs (85), one end of the adjustment spring (85) is provided with a movable plate (86), the top of the movable plate (86) is provided with a gear groove, and the gear groove is meshed with the first gear (83), the outer wall of the movable plate (86) is provided with a connecting block (87), and the outer wall of the connecting block (87) is provided with a plurality of cleaning rods (88).

10. An automatic control method for a conveyor belt conveyor with a high-inclination angle and anti-runaway function is applicable to a conveyor belt conveyor with a high-inclination angle and anti-runaway function as claimed in any one of claims 1 to 9, characterized in that: The control method of the conveyor belt conveyor is as follows; S1. Optimize the startup procedure. Before starting, give the permanent magnet motor a low-frequency startup signal to allow the motor to output a certain torque. The friction generated by the roller and the belt is greater than the sum of the running resistance of the upper and lower branches of the belt, preventing the belt from sliding down and running away during heavy-load startup. S2. Optimize the anti-"runaway" control program. Add an axis encoder to the main shaft of the drive device to collect speed. The control system compares the speed of the belt with the speed of the drive device to determine whether the belt has an overspeed trend. Once an overspeed trend is detected, the control system promptly controls the brake device to adopt a brake-sticking operation mode to increase the braking force; the tensioning device quickly tensions, and adjusts the relative position of the first guide roller (14) and the first return roller (15) and the distance between the first return roller (15) and the second return roller (16), and adjusts the position of the third guide roller (32), the third return roller (33), and the fourth return roller (34) to adjust the tightness of the belt. For example, If the position of the first guide roller (14) is adjusted roughly upward or the first return roller (15) is adjusted to the right and the second return roller (16) is adjusted to the left to reduce the distance between the two, the belt can be tightened as a whole, thereby increasing the friction between the belt and the driving roller. Otherwise, the belt will be loose as a whole. The hydraulic damping device is automatically engaged to increase the friction between the belt and the damping device, and the upper conveyor belt is stopped from conveying coal. The above measures increase the external braking force of the belt, so that the belt slows down. When the running speed of the belt is less than the critical speed of the flying car, the external braking forces are released one by one, so that the belt conveyor runs at the rated speed. S3. Optimize the parking control program. During normal parking, first give the permanent magnet motor a frequency reduction signal to run at a low speed. After the braking device and the tensioning device stop, the inverter controls the motor to stop working. During abnormal parking, the belt conveyor control system will use a fast brake to reduce the impact and damage to the belt.

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