Automatic adjusting device for coal conveying belt

Abstract

An automatic adjusting device for a coal conveying belt comprises a driving roller, a driven roller and the conveying belt, one end of the conveying belt is in rolling fit with the driving roller, the other end of the conveying belt is in rolling fit with the driven roller, and an adjusting device is arranged at the bottom of the conveying belt and comprises an adjusting roller, a transverse adjusting device and a longitudinal adjusting device. The transverse adjusting device is used for transversely moving the adjusting roller, the longitudinal adjusting device is used for longitudinally moving the adjusting roller, one end of a center shaft of the adjusting roller is universally matched with the fixing part through the spherical connecting part, and the bottom of the fixing part is fixed to the longitudinal adjusting device. The other end of the middle shaft is connected with the transverse adjusting device, the transverse adjusting device comprises a fan-shaped rail, a transmission rod, a rack and a gear umbrella, the middle shaft penetrates through the fan-shaped rail and then is fixed to the transmission rod, the side wall of the bottom of the transmission rod is fixed to the side wall of the top of the gear umbrella, and the conveying belt can be tensioned and corrected through the adjusting device.

Description

Technical Field

[0001] The invention relates to the technical field of coal conveyor belts, in particular to an automatic adjustment device for coal conveyor belts. Background Art

[0002] It is a common problem for the coal conveyor belt of a power plant to deviate during operation, which can lead to abnormal events such as coal spillage, conveyor belt wear and roller damage. In severe cases, it can lead to secondary safety accidents, resulting in serious economic losses.

[0003] One way of manual intervention correction is to use a coal baffle on the coal conveyor belt to solve the problem of conveyor belt deviation. The second way is to adjust the relative height between the coal outlet of the funnel and the conveyor belt, but this method is difficult to adjust after the equipment is installed and fixed, and generally needs to be considered in advance when the equipment is installed. The third way is to manually adjust the position of the roller or conveyor belt to make it return to the correct position. Although the manual correction method can also successfully solve the problem of conveyor belt deviation, there are problems such as large workload, high cost, long correction time and low efficiency. The working principles of common automatic correction devices mainly include mechanical transmission correction devices, hydraulic automatic correction devices and pneumatic automatic correction devices. The working principles of these types of coal conveyor belt correction devices may be different, but they are all for returning the deviated conveyor belt to the correct position by generating lateral friction or other means.

[0004] The Chinese invention patent with authorization announcement number CN110002174B, published on April 16, 2024, discloses an automatic adjustment device for a coal feeder conveyor belt. The reduction motor can keep its output shaft fixed when it is not started, thereby ensuring that the pressure block on the screw rod will not move under the external elastic action of the working conveyor belt, causing the pressure roller to be unable to be pressed tightly against the working conveyor belt in real time, but it cannot correct the deviation of the conveyor belt. Summary of the invention

[0005] In view of the above technical problems, the present invention provides an automatic adjusting device for a coal conveyor belt, which can tighten the conveyor belt and correct the deviation of the conveyor belt through the adjusting device.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] An automatic adjustment device for a coal conveyor belt comprises a driving roller, a driven roller and a conveyor belt, wherein one end of the conveyor belt rolls with the driving roller, and the other end of the conveyor belt rolls with the driven roller. An adjustment device is provided at the bottom of the conveyor belt, and the adjustment device comprises an adjustment roller, a transverse adjustment device and a longitudinal adjustment device. The adjustment roller rolls with the conveyor belt, the transverse adjustment device is used to move the adjustment roller laterally, and the longitudinal adjustment device is used to move the adjustment roller longitudinally.

[0008] Furthermore, one end of the central axis of the adjusting roller is universally matched with the fixing part through a spherical connector, and the bottom of the fixing part is fixed to the longitudinal adjustment device; the other end of the central axis is connected to the transverse adjustment device, and the transverse adjustment device includes a fan-shaped track, a transmission rod, a rack and a gear umbrella. The central axis passes through the fan-shaped track and is fixed to the transmission rod, and the bottom side wall of the transmission rod is fixed to the top side wall of the gear umbrella; the bottom of the gear umbrella is hinged to the top of the longitudinal adjustment device through a hinge; the top of the gear umbrella is meshed with the rack, and the side wall of the rack is fixed to the driving device.

[0009] Furthermore, a ball is rotatably connected to the outer wall of the central shaft, and the outer wall of the ball is rollingly matched with the inner wall of the sector-shaped track.

[0010] Furthermore, a first pointer is fixed to the outer side wall of the transmission rod, and an angle matching the first pointer is marked on the outer side wall of the sector track.

[0011] Furthermore, the driving device includes an oil tank, a hydraulic cylinder, a push rod and an oil pump. The bottom of the oil tank is fixed to the bottom of the inner cavity of the first protective shell. The oil pump is arranged inside the oil tank. The output end of the oil tank is connected to the input end of the hydraulic cylinder through an oil pipe, and the output end of the hydraulic cylinder is connected to the oil tank through an oil pipe; one end of the push rod is arranged inside the hydraulic cylinder, and the other end of the push rod is fixed to the rack.

[0012] Furthermore, a second pointer is fixed on the outer periphery of the push rod, and a scale is marked on the bottom of the second pointer.

[0013] Furthermore, the longitudinal adjustment device includes a connecting frame and an electric telescopic rod, the top of the connecting frame is fixed to the bottom of the fan-shaped track and the bottom of the hinge; the top of the electric telescopic rod is fixed to the bottom of the connecting frame, and the bottom of the electric telescopic rod is fixed to the bottom of the inner cavity of the second protective shell.

[0014] Furthermore, the bottom of the rack meshes with the top of the first gear, the bottom of the first gear meshes with the top of the second gear, and the bottom of the second gear meshes with the top of the gear bevel; the diameter of the first gear is greater than the diameter of the second gear.

[0015] A method for using an automatic adjustment device for a coal conveyor belt comprises the following steps:

[0016] The external detection device monitors the conveyor belt in real time and issues an alarm when the conveyor belt deflects or becomes loose;

[0017] Use the lateral adjustment device to correct the conveyor belt, and use the longitudinal adjustment device to tighten the conveyor belt.

[0018] Furthermore, the use of the lateral adjustment device to correct the conveyor belt deviation comprises the following steps:

[0019] According to the deviation of the conveyor belt, the output power and output of the oil pump are set;

[0020] Depending on the direction of the conveyor belt deviation, choose to add or release oil to the hydraulic cylinder.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. The present invention can tighten the conveyor belt and correct the deviation of the conveyor belt through the adjusting device.

[0023] 2. The transverse adjustment device of the present invention can move the adjustment roller transversely to correct the deviation of the conveyor belt; the longitudinal adjustment device can move the adjustment roller longitudinally to tighten the conveyor belt. The transverse adjustment device cooperates with the longitudinal adjustment device. The tightened conveyor belt can ensure that the conveyor belt can transport coal normally and is not prone to deviation. If deviation occurs, the transverse adjustment device can also drive the conveyor belt to reset to prevent malfunction during coal transportation.

[0024] 3. When the external detection device of the present invention detects that the conveyor belt is offset, a driving device is used to drive the rack to move in a direction opposite to the offset direction. The movement of the rack drives the gear umbrella to rotate, the gear umbrella drives the transmission rod to rotate, and the transmission rod drives the central axis to move in the fan-shaped track, thereby adjusting the displacement of the adjusting roller to drive the conveyor belt to reset; in the process of moving the adjusting roller, the end of the adjusting roller connected to the fixed part can be ensured not to be damaged under the action of the spherical connecting part.

[0025] 4. When the conveyor belt of the present invention becomes loose, the electric telescopic rod can be retracted so that the electric telescopic rod drives the adjusting roller to move downward through the fan-shaped track, thereby tightening the conveyor belt; if the conveyor belt is too tight, the electric telescopic rod can also be extended to loosen the conveyor belt.

[0026] 5. The conveyor belt runs at a high speed, and the speed of the hydraulic cylinder adjustment may not meet the usage requirements. Therefore, a first gear with a larger diameter is used to mesh with the rack, and a second gear with a smaller diameter is used to mesh with the bevel gear. The displacement of the rack is amplified by the first gear and the second gear, so that the position of the adjusting roller can be corrected more quickly. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of the present invention;

[0028] Figure 2 is a schematic diagram of the structure of the regulating device;

[0029] Figure 3is a schematic diagram of the structure of the lateral adjustment device;

[0030] Figure 4 for Figure 3 Schematic diagram of the structure of the middle A area;

[0031] Figure 5 is a schematic diagram of the structure of the fixing part;

[0032] Figure 6 is a front view of the lateral adjustment device;

[0033] Figure 7 is a schematic diagram of the structure of the driving device;

[0034] Figure 8 It is a schematic diagram of the structure of the gear;

[0035] Fig. 9 It is a flow chart of the present invention.

[0036] The accompanying drawings are marked as:

[0037] 1. Driving roller; 2. Driven roller; 3. Conveyor belt; 4. Adjusting device; 41. Second protective shell; 42. Adjusting roller; 421. Central axis; 422. Fixing piece; 43. Lateral adjusting device; 431. Fan-shaped track; 432. Transmission rod; 433. Rack; 434. Gear umbrella; 435. Articulated part; 436. Ball; 437. First pointer; 441. Connecting frame; 442. Telescopic rod; 45. Driving device; 451. Oil tank; 452. Hydraulic cylinder; 453. Push rod; 454. Oil pipe; 455. Second pointer; 456. First valve; 457. Second valve; 458. Oil pump; 461. First gear; 462. Second gear; 5. First protective shell. DETAILED DESCRIPTION

[0038] See also Figure 1-Figure 8 The automatic adjustment device for the coal conveyor belt of this embodiment includes a driving roller 1, a driven roller 2 and a conveyor belt 3. One end of the conveyor belt 3 rolls with the driving roller 1, and the other end of the conveyor belt 3 rolls with the driven roller 2. An adjustment device 4 is provided at the bottom of the conveyor belt 3. The adjustment device 4 includes an adjustment roller 42, a lateral adjustment device 43 and a longitudinal adjustment device. The adjustment roller 42 rolls with the conveyor belt 3. The lateral adjustment device 43 is used to move the adjustment roller 42 laterally, and the longitudinal adjustment device is used to move the adjustment roller 42 longitudinally.

[0039] The transverse adjustment device 43 can move the adjustment roller 42 transversely, thereby correcting the deviation of the conveyor belt 3; the longitudinal adjustment device can move the adjustment roller 42 longitudinally, thereby tightening the conveyor belt 3. The transverse adjustment device 43 cooperates with the longitudinal adjustment device. When the conveyor belt 3 is tightened, it can ensure that the conveyor belt 3 transports coal normally and is not prone to deviation. If deviation occurs, the transverse adjustment device 43 can also drive the conveyor belt 3 to reset, thereby preventing malfunctions during coal transportation.

[0040] Furthermore, one end of the central axis 421 of the adjusting roller 42 is universally matched with the fixing part 422 through a spherical connector, and the bottom of the fixing part 422 is fixed to the longitudinal adjustment device; the other end of the central axis 421 is connected to the transverse adjustment device 43, and the transverse adjustment device 43 includes a fan-shaped track 431, a transmission rod 432, a rack 433 and a toothed umbrella 434. The central axis 421 passes through the fan-shaped track 431 and is fixed to the transmission rod 432, and the bottom side wall of the transmission rod 432 is fixed to the top side wall of the toothed umbrella 434; the bottom of the toothed umbrella 434 is hinged to the top of the longitudinal adjustment device through a hinge 435; the top of the toothed umbrella 434 is meshed with the rack 433, and the side wall of the rack 433 is fixed to the driving device 45.

[0041] When the external detection device detects that the conveyor belt is offset, the driving device 45 is used to drive the rack 433 to move in the direction opposite to the offset direction. The movement of the rack 433 drives the toothed umbrella 434 to rotate, and the toothed umbrella 434 drives the transmission rod 432 to rotate. The transmission rod 432 drives the central axis 421 to move in the fan-shaped track 431, and then adjusts the displacement of the adjusting roller 42 to drive the conveyor belt 3 to reset; in the process of moving the adjusting roller 42, the end of the adjusting roller 42 connected to the fixing part 422 can be ensured not to be damaged under the action of the spherical connecting part.

[0042] Furthermore, the outer wall of the central shaft 421 is rotatably connected with a ball 436 , and the outer wall of the ball 436 is rollingly matched with the inner wall of the sector track 431 .

[0043] The balls 436 can reduce the friction between the central axis 421 and the sector track 431 , so that the central axis 421 can move more stably in the sector track 431 .

[0044] Furthermore, a first pointer 437 is fixed to the outer wall of the transmission rod 432 , and an angle matching the first pointer 437 is marked on the outer wall of the sector track 431 .

[0045] The moving angle of the adjusting roller 42 can be observed more conveniently through the first pointer 437 , so that the adjusting roller 42 can be adjusted accurately.

[0046] Furthermore, the driving device 45 includes an oil tank 451, a hydraulic cylinder 452, a push rod 453 and an oil pump 458. The bottom of the oil tank 451 is fixed to the bottom of the inner cavity of the first protective shell 5, the oil pump 458 is arranged inside the oil tank 451, the output end of the oil tank 451 is connected to the input end of the hydraulic cylinder 452 through the oil pipe 454, and the output end of the hydraulic cylinder 452 is connected to the oil tank 451 through the oil pipe 454; one end of the push rod 453 is arranged inside the hydraulic cylinder 452, and the other end of the push rod 453 is fixed to the rack 433.

[0047] According to the need of adjusting the roller 42, the amount of oil in the hydraulic cylinder 452 is adjusted, thereby adjusting the extended length of the push rod 453. In the normal state, one end of the push rod 453 located in the hydraulic cylinder 452 is in the middle state of the hydraulic cylinder 452; when the adjusting roller 42 needs to be adjusted, the push rod 453 can be moved outward by injecting oil into the hydraulic cylinder 452, and the push rod 453 can be moved inward by releasing oil from the hydraulic cylinder 452.

[0048] Furthermore, a second pointer 455 is fixed on the outer periphery of the push rod 453 , and a scale is marked on the bottom of the second pointer 455 .

[0049] The second pointer 455 cooperates with the scale at the bottom to better judge the displacement distance of the push rod 453.

[0050] Furthermore, the longitudinal adjustment device includes a connecting frame 441 and an electric telescopic rod 442. The top of the connecting frame 441 is fixed to the bottom of the fan-shaped track 431 and the bottom of the hinge 435. The top of the electric telescopic rod 442 is fixed to the bottom of the connecting frame 441, and the bottom of the electric telescopic rod 442 is fixed to the bottom of the inner cavity of the second protective shell 41.

[0051] When the conveyor belt 3 becomes loose, the electric telescopic rod 442 can be retracted so that the electric telescopic rod 442 drives the adjusting roller 42 to move downward through the fan-shaped track 431, thereby tightening the conveyor belt 3; if the conveyor belt 3 is too tight, the electric telescopic rod 442 can also be extended to loosen the conveyor belt 3.

[0052] Furthermore, the bottom of the rack 433 meshes with the top of the first gear 461 , the bottom of the first gear 461 meshes with the top of the second gear 462 , and the bottom of the second gear 462 meshes with the top of the gear bevel 434 ; the diameter of the first gear 461 is greater than the diameter of the second gear 462 .

[0053] The conveyor belt 3 is running at a relatively high speed, and the speed adjusted by the hydraulic cylinder 452 may not be able to meet the usage requirements. Therefore, a first gear 461 with a larger diameter is used to mesh with the rack 433, and a second gear 462 with a smaller diameter is used to mesh with the bevel gear 434. The displacement of the rack 433 is amplified by the first gear 461 and the second gear 462, so that the position of the adjustment roller 42 can be corrected more quickly.

[0054] The method for using the automatic adjustment device for the coal conveyor belt of this embodiment comprises the following steps:

[0055] The external detection device monitors the conveyor belt 3 in real time, and sends out an alarm when the conveyor belt 3 deflects or becomes loose;

[0056] Use the lateral adjustment device 43 to correct the conveyor belt 3, and use the longitudinal adjustment device to tighten the conveyor belt 3;

[0057] According to the deviation of the conveyor belt 3, the output power and output of the oil pump 458 are set;

[0058] According to the direction of the conveyor belt 3 deviation, oil is supplied or discharged into the hydraulic cylinder 452.

[0059] When oil is delivered to the hydraulic cylinder 452, the first valve 456 is closed, the second valve 457 is opened, and the oil pump 458 is started to deliver oil to the hydraulic cylinder 452, so that the hydraulic cylinder 452 drives the push rod 453 to move, and the push rod 453 drives the adjusting roller 42 to move through the rack 433, the gear bevel 434, the transmission rod 432, and the central shaft 421 in sequence;

[0060] When the hydraulic cylinder 452 is drained, the first valve 456 is opened, the second valve 457 is closed, and the oil in the hydraulic cylinder 452 is transported back to the oil tank 451 .

[0061] The regulating device has two starting modes:

[0062] Method 1: The external detection device sends out a voice alarm of "Conveyor belt 3 is deviating", prompting the local staff to check; the local monitor directly transmits the image to the control room and switches to the main control screen to remind the control staff to check.

[0063] Mode 2: After receiving the signal, the controller starts the oil pump 458 and selects the oil pipe 454 to be used according to the deviation position of the conveyor belt 3. The oil enters the hydraulic cylinder 452 and drives the push rod 453, which drives the rack 433 to adjust the angle of the adjustment roller 42 through the tooth umbrella 434, the transmission rod 432 and the central shaft 421, so that the conveyor belt 3 is reset.

[0064] For example: when the left running switch sends out a deviation signal. After receiving the signal, the local PLC controller starts the oil pump 458, and the second valve 457 opens to supply oil to the hydraulic cylinder 452, and the oil inlet pressure is maintained at 2.2MPa. The hydraulic cylinder 452 is filled with 2MPa hydraulic oil. When the hydraulic cylinder 452 is filled with oil, the first valve 456 is closed. The push rod 453 moves forward, driving the rack 433 to move forward together. When the hydraulic oil pressure in the hydraulic cylinder 452 is higher than 2.1MPa, the first valve 456 opens and begins to overflow. The pressure at the oil inlet and oil outlet ends is maintained at 0.1MPa, which keeps the push rod 453 moving while maintaining relative stability to prevent the push rod 453 from moving quickly and causing the adjustment roller 42 to become unstable. The pointer is used to monitor the moving distance of the rack 433, with the central axis 421 rotating 5° as the step size. When the rack 433 moves a distance to make the central axis 421 rotate 5°, the hydraulic cylinder 452 stops, and the first valve 456 and the second valve 457 are closed for 3 minutes. If the conveyor belt 3 is not reset, it rotates another 5° until the conveyor belt 3 is reset. After the conveyor belt 3 is reset, the deviation signal is sent, the hydraulic cylinder 452 stops, and the first valve 456 is closed.

[0065] The hydraulic cylinder 452 signal, steering servo valve signal, valve set overflow signal, pointer signal, etc. are all fed back to the control room through the data transmitter. The control staff monitors the status and can stop the conveyor belt 3 at any time.

[0066] What has been described above are only preferred specific implementations of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, can make equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An automatic adjustment device for a coal conveyor belt, comprising a driving roller (1), a driven roller (2) and a conveyor belt (3), wherein one end of the conveyor belt (3) is in rolling cooperation with the driving roller (1), and the other end of the conveyor belt (3) is in rolling cooperation with the driven roller (2), characterized in that: An adjusting device (4) is provided at the bottom of the conveyor belt (3), and the adjusting device (4) comprises an adjusting roller (42), a transverse adjusting device (43) and a longitudinal adjusting device. The adjusting roller (42) and the conveyor belt (3) are in rolling cooperation, the transverse adjusting device (43) is used to move the adjusting roller (42) transversely, and the longitudinal adjusting device is used to move the adjusting roller (42) longitudinally.

2. The automatic adjustment device for a coal conveyor belt according to claim 1, characterized in that: One end of the central axis (421) of the adjusting roller (42) is universally matched with the fixing member (422) through a spherical connector, and the bottom of the fixing member (422) is fixed to the longitudinal adjusting device; the other end of the central axis (421) is connected to the transverse adjusting device (43), and the transverse adjusting device (43) comprises a fan-shaped track (431), a transmission rod (432), a rack (433) and a toothed umbrella (434); the central axis (421) passes through the fan-shaped track (431) and is fixed to the transmission rod (432); the bottom side wall of the transmission rod (432) is fixed to the top side wall of the toothed umbrella (434); the bottom of the toothed umbrella (434) is hinged to the top of the longitudinal adjusting device through a hinge (435); the top of the toothed umbrella (434) is meshed with the rack (433), and the side wall of the rack (433) is fixed to the driving device (45).

3. The automatic adjustment device for a coal conveyor belt according to claim 2, characterized in that: The outer wall of the central shaft (421) is rotatably connected with a ball bearing (436), and the outer wall of the ball bearing (436) is rollingly matched with the inner wall of the sector track (431).

4. The automatic adjustment device for a coal conveyor belt according to claim 3, characterized in that: A first pointer (437) is fixed on the outer side wall of the transmission rod (432), and an angle matching the first pointer (437) is marked on the outer side wall of the sector track (431).

5. The automatic adjustment device for a coal conveyor belt according to claim 2, characterized in that: The driving device (45) comprises an oil tank (451), a hydraulic cylinder (452), a push rod (453) and an oil pump (458); the bottom of the oil tank (451) is fixed to the bottom of the inner cavity of the first protective shell (5); the oil pump (458) is arranged inside the oil tank (451); the output end of the oil tank (451) is connected to the input end of the hydraulic cylinder (452) through an oil pipe (454); the output end of the hydraulic cylinder (452) is connected to the oil tank (451) through an oil pipe (454); one end of the push rod (453) is arranged inside the hydraulic cylinder (452); the other end of the push rod (453) is fixed to the rack (433).

6. The automatic adjustment device for a coal conveyor belt according to claim 5, characterized in that: A second pointer (455) is fixed on the outer periphery of the push rod (453), and a scale is marked on the bottom of the second pointer (455).

7. The automatic adjustment device for a coal conveyor belt according to claim 2, characterized in that: The longitudinal adjustment device comprises a connecting frame (441) and an electric telescopic rod (442); the top of the connecting frame (441) is fixed to the bottom of the fan-shaped track (431) and the bottom of the hinge (435); the top of the electric telescopic rod (442) is fixed to the bottom of the connecting frame (441), and the bottom of the electric telescopic rod (442) is fixed to the bottom of the inner cavity of the second protective shell (41).

8. The automatic adjustment device for a coal conveyor belt according to claim 2, characterized in that: The bottom of the rack (433) is meshed with the top of the first gear (461), the bottom of the first gear (461) is meshed with the top of the second gear (462), and the bottom of the second gear (462) is meshed with the top of the gear bevel (434); the diameter of the first gear (461) is greater than the diameter of the second gear (462).

9. A method for using an automatic adjustment device for a coal conveyor belt, characterized in that: An automatic adjustment device for a coal conveyor belt according to any one of claims 1 to 8, comprising the following steps: The external detection device monitors the conveyor belt (3) in real time, and when the conveyor belt (3) deflects or becomes loose, the external detection device issues an alarm; A lateral adjustment device (43) is used to correct the deviation of the conveyor belt (3), and a longitudinal adjustment device is used to tighten the conveyor belt (3).

10. The method for using the automatic adjustment device for a coal conveyor belt according to claim 9, characterized in that: The method of using the lateral adjustment device (43) to correct the deviation of the conveyor belt (3) comprises the following steps: According to the offset of the conveyor belt (3), the output power and output of the oil pump (458) are set; According to the direction in which the conveyor belt (3) deviates, oil is supplied or discharged into the hydraulic cylinder (452).

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