A multi-point driving scraper conveying device with fault identification and fault-tolerant control

Abstract

The present application provides a kind of multi-point drive scraper conveyor device with fault identification and fault-tolerant control, it is related to coal mining technical field.The present application includes conveying module, drive module, fault detection module.The conveying module includes scraper chain of scraper conveyor and scraper installed on scraper chain and moved with scraper chain;Drive module includes motor mounting tray, disengaging track, motor at both ends in scraper chain and multi-stage motor arranged between both ends motor, fault detection module includes piezoelectric resonator, signal transceiver device and computer, when motor works and receives different pressure or vibration, different intensity of current is generated, piezoelectric resonator sends current intensity signal to computer, and judges the working state of motor, and motor automatic disengaging device is configured under both ends motor and multi-stage motor, when motor is judged as abnormal, motor will be disengaged from working position backward through disengaging device for repair.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of coal mining, and particularly relates to a multi-point driving scraper conveyor device with fault identification and fault-tolerant control. BACKGROUND

[0002] The scraper conveyor is the main transportation equipment of the fully mechanized coal mining face in the coal mine, and with the development of modernization of the coal mining technology, new requirements are put forward for the long-distance and large-load fully mechanized coal mining face. In the process of cutting coal from the head to the tail of the long-distance fully mechanized coal mining face, the coal amount on the scraper conveyor changes greatly, the working load of the scraper chain changes greatly, and other characteristics, thereby causing the load of the sprocket at the head and the tail to fluctuate greatly, the speed difference of the sprocket at the head and the tail to be obvious, the sprocket at the head and the tail to be worn differently, the chain to be easily damaged, the motor to be faulty, and the maintenance to be difficult, which causes certain hindrance to the long-term mining work.

[0003] Therefore, it is necessary to design a multi-point driving scraper conveyor device with fault identification and fault-tolerant control, so as to reduce the power consumption and wear of each sprocket in the multi-motor multi-point driving mode, reduce the load borne by each chain ring, and have the functions of fault detection and fault tolerance, so as to solve the above problems. SUMMARY

[0004] In view of the deficiencies of the prior art, the present application provides a multi-point driving scraper conveyor device with fault identification and fault-tolerant control.

[0005] A multi-point driving scraper conveyor device with fault identification and fault-tolerant control comprises a conveying module, a driving module and a fault detection module.

[0006] The conveying module comprises a scraper chain of the scraper conveyor and a scraper mounted on the scraper chain and moving with the scraper chain.

[0007] The driving module comprises a motor mounting tray, a disengagement track, motors at two ends in the scraper chain, and multi-stage motors arranged between the two motors, wherein the two motors and the multi-stage motors arranged between the two motors are provided with sprockets at the output ends, the output shaft of the motor is connected to the sprocket shaft of the scraper conveyor through a torque limiting coupling, the sprockets are meshed and connected with the scraper chain, and each motor is mounted on the motor mounting tray, and the motor mounting tray is mounted on the disengagement track.

[0008] The fault detection module comprises a piezoelectric resonator, a signal transceiver device and a computer, the piezoelectric resonator and the signal transceiver device are arranged in each motor, the piezoelectric resonator of each motor is connected with the signal transceiver device on the same motor, and the piezoelectric resonator sends the current intensity signal to the computer through the signal transceiver device.

[0009] When the motor is subjected to different pressures or vibrations during operation, it will generate currents of different intensities. The piezoelectric resonator sends the current intensity signal to the computer, which is used to determine the working status of the motor. In addition, an automatic motor disengagement device is configured under the two-end motors and the multi-stage motor. The automatic disengagement device is a motor mounting tray and a disengagement track. When the motor is determined to be abnormal, the disengagement device will pull the motor backward out of the working position for maintenance.

[0010] The beneficial effects of adopting the above technical solution are:

[0011] The present invention provides a multi-point driven scraper conveyor device with fault identification and fault-tolerant control, which has the following beneficial effects:

[0012] 1) When existing scraper conveyors are operated under load, the speed difference between the head sprocket and the tail chain increases significantly, causing the chain to vibrate. The present invention uses a multi-point motor drive to shorten the conveying distance between two adjacent sprockets, thereby reducing the tensile stress on each scraper chain segment, alleviating chain vibration during operation and improving operational stability.

[0013] 2) During normal operation, existing scraper conveyors experience significant variations in the amount of coal transported on the working surface and the load on the scraper chain. In practice, the long-distance drive of the dual-motor system can significantly damage the sprocket at the tail end. The present invention utilizes multi-point motor drive, which effectively reduces the load on each sprocket and motor, lowers motor power consumption, and mitigates wear on each sprocket, thus improving the reliability of the scraper conveyor's operation.

[0014] 3) The motor and sprocket are connected through a torque-limiting coupling. When the torque of a motor exceeds the normal operating range, the connection between the motor and the sprocket can be automatically cut off to ensure that the scraper conveyor can continue to operate stably and prevent further damage to the motor. At the same time, a piezoelectric resonator is installed on each motor, and a signal transceiver is added to send the current intensity signal to the computer for real-time detection. When the computer compares the characteristics of the electrical signal and determines that there is indeed a problem, it will send information to the control console. The control console automatically disengages the device through remote control, removes the motor from the working position and waits for maintenance, and maintains the conveying surface to continue working through the coordinated control of power. This method can realize real-time monitoring of the operation process, prevent safety hazards caused by negligent supervision during operation, improve the safety and reliability of the scraper conveyor, and maintain the continuous and stable operation of the working surface through the coordinated control of power, further improving the working efficiency of the scraper conveyor. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Schematic diagram of a multi-point driven scraper conveying device in an embodiment of the present invention;

[0016] In the figure, 1-scraper, 2-scraper chain, 3-sprocket, 4-torque limiting coupling, 5-derailment track, 6-motor mounting tray, 7-drive motor, 8-signal transceiver;

[0017] Figure 2 This is a flow chart of the multi-point driven scraper conveying method in an embodiment of the present invention. DETAILED DESCRIPTION

[0018] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0019] A multi-point driven scraper conveyor with fault identification and fault-tolerant control, such as Figure 1 As shown, it includes a conveying module, a driving module, and a fault detection module.

[0020] The conveying module includes a scraper chain of a scraper conveyor and a scraper installed on the scraper chain and moving with the scraper chain;

[0021] The drive module includes a motor mounting tray, a derailment track, motors at both ends of the scraper chain, and a multi-stage motor arranged between the motors at both ends, wherein the output ends of the motors at both ends and the multi-stage motor arranged between the motors at both ends are provided with sprockets, the output shafts of the motors and the sprocket shafts of the scraper conveyor are connected through torque limiting couplings, the sprockets are meshed with the scraper chain, each motor is mounted on the motor mounting tray, and the motor mounting tray is mounted on the derailment track;

[0022] The fault detection module includes a piezoelectric resonator, a signal transceiver, and a computer. The piezoelectric resonator and the signal transceiver are arranged in each motor. The piezoelectric resonator of each motor is connected to the signal transceiver on the same motor. The piezoelectric resonator sends a current intensity signal to the computer through the signal transceiver.

[0023] When the motor is subjected to different pressures or vibrations during operation, it will generate currents of different intensities. The piezoelectric resonator sends the current intensity signal to the computer, which is used to determine the working status of the motor. In addition, an automatic motor disengagement device is configured under the two-end motors and the multi-stage motor. The automatic disengagement device is a motor mounting tray and a disengagement track. When the motor is determined to be abnormal, the disengagement device will pull the motor backward out of the working position for maintenance.

[0024] In this embodiment, the specific process of the fault identification and fault tolerance control function is as follows: Figure 2 As shown:

[0025] When the motor output torque exceeds the set value, the torque limiting coupling will cut off the connection between the motor and the sprocket. At the same time, the piezoelectric resonator on each motor sends the current intensity signal to the computer in real time. The computer compares and determines the current intensity signal according to the preset interval:

[0026] If the real-time current intensity is within the preset range, it is determined that the motor is operating normally. After the motor output torque drops to the set value, the torque limiting coupling will automatically lock the connection between the motor and the sprocket;

[0027] If the real-time current intensity is not within the preset range, the motor is judged to be in an abnormal working state. At this time, the console will receive a motor abnormality signal and issue a command to the automatic disengagement device of the corresponding motor through the console to drag it backwards away from the sprocket shaft and wait for maintenance by technicians.

[0028] like Figure 1 In the hypothetical direction of operation, the motors are named a, b, c, d, e, and f from left to right, where a and f are the motors at the two ends, and c, d, e, and f are the multi-stage motors located between the two end motors. It should be understood that this invention does not include only six motors. The accompanying drawings capture the positions at the two ends of the device to better illustrate the structure and operation of the device. The actual number of motors in the middle position of this invention can be set to multiple according to actual conveying requirements.

[0029] like Figure 1 A multi-point driven scraper conveyor with fault identification and fault tolerance control includes a scraper chain 2 and a plurality of scrapers 1 mounted on the scraper chain 2, and a plurality of drive motors 7 are arranged in the entire conveying surface. Figure 1 6 can be seen in the figure); the output end of each motor 7 is provided with a sprocket 3, which is engaged with the scraper chain 2 and is used to drive the scraper chain 2 to move; each motor 7 is connected to each sprocket 3 through a torque limiting coupling 4; each motor 7 is equipped with a piezoelectric resonator and an information transceiver module 8; each drive motor 7 is mounted on a motor mounting tray 6, and the motor mounting tray 6 is mounted on the decoupling track 5.

[0030] In the present invention, when the scraper conveyor is operating normally, the torque borne by all torque-limiting couplings 4 is within the normal operating torque range of the drive motor 7, and the real-time current intensity generated by all piezoelectric resonators and information transceiver modules 8 is within the normal current intensity range. When the torque of a drive motor 7 increases beyond the normal value, the torque-limiting coupling 4 will enter an overload state and automatically disconnect the corresponding drive motor 7 from the sprocket 3 connected thereto; at the same time, since the increase in the torque of the motor 7 will cause it to vibrate, the piezoelectric resonator will generate a current signal under the action of vibration and pressure, which will be significantly different from the current generated when the drive motor 7 is operating normally. The piezoelectric resonator and information transceiver module 8 will send this signal to the computer, and the computer will determine whether the drive motor 7 is truly faulty through data comparison.

[0031] If the real-time current intensity is within the preset range, it is determined that the working state of the motor 7 is normal. After the output torque of the motor 7 drops to the set value, the torque limiting coupling 4 will automatically lock the connection between the motor 7 and the sprocket 3; if the real-time current intensity is not within the preset range, it is determined that the working state of the drive motor 7 is abnormal. At this time, the console will receive a motor abnormality signal. The technician will issue an instruction to the automatic disengagement device of the corresponding drive motor 7 through the console. After receiving the instruction, the motor mounting tray 6 will disengage from the corresponding sprocket 3 backward along the disengagement track 5 and wait for maintenance by the technician, so as to timely prevent safety hazards during normal operation, prevent secondary damage to the corresponding drive motor 7, and improve the working safety of the scraper conveyor.

[0032] When the faulty drive motor 7 leaves the working position, the computer will recalculate the power required by the remaining drive motors 7 to maintain the normal operation of the scraper conveyor. After the calculation is completed, the control console will redistribute the power of the remaining drive motors 7 to ensure the normal operation of the scraper conveyor and further improve the working efficiency of the scraper conveyor. The specific process is as follows: Figure 2 As shown, for example, if drive motor b fails and is disengaged from its working position, the computer will recalculate the power required by its adjacent drive motors a and c to maintain normal operation of the scraper conveyor. If a and c are unable to bear the power, the computer will add more drive motors and recalculate the power required to jointly bear the missing drive motor b. If multiple drive motors 7 fail and are disengaged from their working positions, the calculation results will show that the remaining drive motors are unable to continue to maintain normal operation of the scraper conveyor. In this case, the control console will promptly stop the scraper conveyor and resume operation after the fault is resolved.

[0033] The above description is merely a preferred embodiment of the present disclosure and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in the embodiments of the present disclosure is not limited to the technical solutions formed by a specific combination of the above-mentioned technical features, but should also encompass other technical solutions formed by any combination of the above-mentioned technical features or their equivalents without departing from the above-mentioned inventive concept. For example, a technical solution formed by mutually replacing the above-mentioned features with (but not limited to) technical features with similar functions disclosed in the embodiments of the present disclosure.

Claims

1. A multi-point driven scraper conveyor with fault identification and fault-tolerant control, characterized in that: Including conveying module, driving module and fault detection module; The conveying module includes a scraper chain of a scraper conveyor and a scraper installed on the scraper chain and moving with the scraper chain; The drive module includes a motor mounting tray, a derailment track, motors at both ends of the scraper chain, and a multi-stage motor arranged between the motors at both ends, wherein the output ends of the motors at both ends and the multi-stage motor arranged between the motors at both ends are provided with sprockets, the output shafts of the motors and the sprocket shafts of the scraper conveyor are connected through torque limiting couplings, the sprockets are meshed with the scraper chain, each motor is mounted on the motor mounting tray, and the motor mounting tray is mounted on the derailment track; The fault detection module includes a piezoelectric resonator, a signal transceiver, and a computer. The piezoelectric resonator and the signal transceiver are arranged in each motor. The piezoelectric resonator of each motor is connected to the signal transceiver on the same motor. The piezoelectric resonator sends a current intensity signal to the computer through the signal transceiver. When the motor is operating, it generates currents of varying intensities when subjected to different pressures or vibrations. The piezoelectric resonator sends the current intensity signal to a computer, which is used to determine the motor's operating status. Both the two-end motor and the multi-stage motor are equipped with an automatic motor disengagement device. The automatic disengagement device consists of a motor mounting tray and a disengagement track. When the motor is determined to be abnormal, the disengagement device will pull the motor backward out of its operating position for maintenance. The determination of the working state of the motor is specifically as follows: if the current intensity signal is within a preset range, the motor is determined to be working normally, and after the motor output torque drops to a set value, the torque limiting coupling automatically locks the connection between the motor and the sprocket; If the current intensity model is not within the preset range, the motor is considered to be operating abnormally. At this time, the console will receive a motor abnormality signal. The technician will issue a command to the automatic disengagement device of the corresponding motor through the console. After receiving the command, the motor mounting tray will move backward along the disengagement track to disengage the corresponding sprocket and wait for technicians to inspect and repair it. When the faulty motor leaves its working position, the computer will recalculate the power required for the remaining motors to maintain the normal operation of the scraper conveyor; after the calculation is completed, the power of the remaining motors will be redistributed through the console. Specifically, when the faulty motor leaves its working position, the computer will recalculate the power required for the motors adjacent to the faulty motor to maintain the normal operation of the scraper conveyor. When the adjacent motors cannot bear the power, the computer will add more motors and recalculate the power required to jointly bear the missing power of the faulty motor; when multiple motors fail and leave their working positions, the calculation results will show that the remaining motors can no longer maintain the normal operation of the scraper conveyor, then the console will stop the scraper conveyor in time and continue to run after the fault is eliminated.

Images