CN114394377B - Multi-point driving scraper conveyor synchronicity control system - Google Patents
Multi-point driving scraper conveyor synchronicity control system Download PDFInfo
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- CN114394377B CN114394377B CN202210142661.2A CN202210142661A CN114394377B CN 114394377 B CN114394377 B CN 114394377B CN 202210142661 A CN202210142661 A CN 202210142661A CN 114394377 B CN114394377 B CN 114394377B
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- 238000000034 method Methods 0.000 abstract description 44
- 230000008569 process Effects 0.000 abstract description 43
- 238000005065 mining Methods 0.000 abstract description 4
- 230000002159 abnormal effect Effects 0.000 description 11
- 230000005540 biological transmission Effects 0.000 description 6
- 238000004891 communication Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000033001 locomotion Effects 0.000 description 2
- 238000007790 scraping Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G19/00—Conveyors comprising an impeller or a series of impellers carried by an endless traction element and arranged to move articles or materials over a supporting surface or underlying material, e.g. endless scraper conveyors
- B65G19/18—Details
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G19/00—Conveyors comprising an impeller or a series of impellers carried by an endless traction element and arranged to move articles or materials over a supporting surface or underlying material, e.g. endless scraper conveyors
- B65G19/18—Details
- B65G19/20—Traction chains, ropes, or cables
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G23/00—Driving gear for endless conveyors; Belt- or chain-tensioning arrangements
- B65G23/02—Belt- or chain-engaging elements
- B65G23/04—Drums, rollers, or wheels
- B65G23/06—Drums, rollers, or wheels with projections engaging abutments on belts or chains, e.g. sprocket wheels
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G23/00—Driving gear for endless conveyors; Belt- or chain-tensioning arrangements
- B65G23/22—Arrangements or mountings of driving motors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G43/00—Control devices, e.g. for safety, warning or fault-correcting
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Conveyors (AREA)
Abstract
A synchronization control system of a multipoint driving scraper conveyor belongs to the technical field of fully-mechanized mining equipment control. The multipoint driving scraper conveyor synchronicity control system comprises a first-stage motor and a multi-stage motor group arranged between the two first-stage motors, wherein each motor in the first-stage motor and the multi-stage motor group is provided with a chain wheel and a piezoelectric vibrator, each motor in the piezoelectric vibrator, the first-stage motor and the multi-stage motor group is connected with a computer, when the scraper conveyor works, the piezoelectric vibrator sends a current intensity signal to the computer, and the computer judges the working state of the scraper conveyor according to the current intensity signal and controls each motor in the first-stage motor and the multi-stage motor group to work. The multi-point driving scraper conveyor synchronicity control system can realize the grading start and stop of the scraper conveyor, reduce the overall tension born by the scraper chain and improve the reliability of the system in the working process.
Description
Technical Field
The invention relates to the technical field of fully-mechanized mining equipment control, in particular to a synchronization control system of a multipoint driving scraper conveyor.
Background
At present, in the field of coal mining and transportation, a scraper conveyor is an indispensable production device, long-distance and heavy-load operation is a normal state in the working process of the scraper conveyor along with the improvement of coal mining technology, and as the scraper conveyor operates at a long distance and heavy load, if motors are additionally arranged at two ends, the whole pulling force is overlarge, the strength requirement on a scraper chain is overhigh, the cost is increased, the scraper conveyor depends on the scraper chain transmission, a certain hysteresis phenomenon exists in the chain transmission, and the safety of the long-distance working process cannot be ensured.
Therefore, a better driving method is needed to effectively solve the problems of large long-distance working tension and transmission hysteresis of the scraper conveyor.
Disclosure of Invention
In order to solve the technical problems in the prior art, the invention provides a multi-point driving scraper conveyor synchronicity control system which can realize the staged start and stop of a scraper conveyor, reduce the overall tensile force born by a scraper chain, effectively avoid the influence of the delay condition of the movement state transmission of the scraper chain on the overall start time and the overall start effect in the start process of the scraper conveyor, and improve the reliability of the system in the working process.
In order to achieve the above object, the technical scheme of the present invention is as follows:
a synchronization control system of a multipoint drive scraper conveyor is arranged on the scraper conveyor, the scraper conveyor comprises a scraper chain and a scraper arranged on the scraper chain,
the multipoint driving scraper conveyor synchronicity control system comprises a first-stage motor arranged at two ends of the inner side of the scraper chain and a multistage motor group arranged between the two first-stage motors;
the output ends of the first-stage motor and each motor in the multi-stage motor group are respectively provided with a chain wheel, and the chain wheels are connected with the scraper chain in a meshed manner and are used for driving the scraper chain to move;
each motor in the one-stage motor and multi-stage motor group is provided with a piezoelectric vibrator;
each motor in piezoelectric vibrator, one-level motor and the multistage motor group all is connected with the computer, and when scraper conveyor worked, piezoelectric vibrator can produce the electric current of different intensity when receiving different pressures or vibration, and piezoelectric vibrator sends the current intensity signal to the computer, the computer judges scraper conveyor's operating condition according to the current intensity signal to each motor work in control one-level motor and the multistage motor group realizes controlling scraper conveyor's start-stop work.
Further, each motor in the one-stage motor and the multi-stage motor group is provided with a signal receiving and transmitting device, the piezoelectric vibrator of each motor is connected with the signal receiving and transmitting device on the same motor, and the signal receiving and transmitting device is connected with a computer through an A/D converter.
Further, the specific process of judging the working state of the scraper conveyor according to the current intensity signal by the computer is as follows:
after the piezoelectric vibrators of the two primary motors and the motors in the multi-stage motor group send the real-time current intensity to the computer, the computer judges the real-time current intensity of each piezoelectric vibrator according to the preset current intensity interval as follows:
if the real-time current intensity is within the preset current intensity interval, the computer judges that the corresponding positions of the scraper conveyor and the piezoelectric vibrator work normally;
if the real-time current intensity is not in the preset current intensity interval, the computer judges that the corresponding positions of the scraper conveyor and the piezoelectric vibrator work abnormally, and the computer firstly controls the motor where the piezoelectric vibrator is positioned to stop working and then sequentially controls the rest motors to stop working.
Further, when the computer sequentially controls the rest motors to stop working, the computer sequentially controls the rest motors to stop working by taking the motor which stops working first as a center according to the sequence from near to far.
Further, the multistage motor group comprises a second-stage motor, a third-stage motor, a fourth-stage motor and a fifth-stage motor which are sequentially arranged between the two first-stage motors, the second-stage motor, the third-stage motor, the fourth-stage motor and the fifth-stage motor are all connected with a computer, and when the scraper conveyor works normally, the computer controls the second-stage motor, the third-stage motor, the fourth-stage motor, the fifth-stage motor and the two first-stage motors to start and stop in a grading manner.
Further, the specific process of the computer controlling the secondary motor, the tertiary motor, the quaternary motor, the penta motor and the two primary motors to start and stop in a grading manner is as follows:
if the scraper chain moves clockwise, the scraper conveyor is started in a grading way: the computer firstly controls two first-stage motors to start simultaneously, and then controls a second-stage motor, a third-stage motor, a fourth-stage motor and a fifth-stage motor to start sequentially; the grading stopping mode of the scraper conveyor is as follows: the computer firstly controls the five-stage motor to stop working, then sequentially controls the four-stage motor, the three-stage motor and the two-stage motor to stop working, and finally controls the two first-stage motors to stop working at the same time;
if the scraper chain moves anticlockwise, the scraper conveyor is started in a grading way: the computer firstly controls two first-level motors to start simultaneously, and then controls a fifth-level motor, a fourth-level motor, a third-level motor and a second-level motor to start sequentially; the grading stopping mode of the scraper conveyor is as follows: the computer firstly controls the second-level motor to stop working, then sequentially controls the third-level motor, the fourth-level motor and the fifth-level motor to stop working, and finally controls the two first-level motors to stop working simultaneously.
The invention has the beneficial effects that:
1) The invention can realize the graded starting of the starting process of the scraper conveyor, reduce the overall tensile force born by the scraper chain, effectively avoid the influence of the delay condition transmitted by the motion state of the scraper chain on the overall starting time and the overall starting effect in the starting process of the scraper conveyor, and utilize the piezoelectric vibrator to measure the vibration and the pressure born by the motor in the running process of the scraper conveyor, the piezoelectric vibrator and the signal transceiver can complete communication, the current intensity is fed back to the signal transceiver, and the current working condition of the scraper conveyor is judged according to the current intensity.
2) Because the scraper chain is in chain transmission in the starting process of the scraper conveyor, hysteresis exists in the starting process, the driving motor of the scraper conveyor is uniformly distributed in multiple stages, so that the stability of the starting process can be improved, and the stability of the braking process can be improved in the same way; meanwhile, when the scraper conveyor works in a long-distance large load mode, if the driving mode of two motors at two ends is adopted, the tensile stress of part of scraper chains is overlarge, damage is easy to cause, when the scraper conveyor works in a large load mode, the chain of the large load working section is bent under the action of the load, so that the chain of the large load working section is loosened to a certain extent relative to other positions, the loosening work of the chain of the large load working section is realized by controlling the rotating speeds of different motors, the work of each motor is controlled by a computer, the loosening degree and the loosening position can be adjusted according to the current load condition, the real-time dynamic adjustment can be realized, and the reliability of the working process of the system is improved.
3) According to the invention, the two primary motors and the multistage motor groups between the two primary motors are used for controlling the start and stop of the scraper conveyor, the motors are started and stopped in a grading manner in the start and stop process of the scraper conveyor, the impact born by the scraper chain in the start and stop process of the scraper conveyor is effectively reduced, the influence of the impact on the service life of the scraper chain of the scraper conveyor and the influence on the whole working life of the scraper conveyor are prevented, the signal transceiver is additionally arranged, the communication with the computer is realized through the A/D converter, the signal transceiver can effectively receive control signals of the computer in real time, meanwhile, the information can be fed back to the computer according to actual conditions, the real-time control of the operation process of the scraper conveyor is realized, the computer can not only control the orderly start and stop of the motors of the scraper conveyor in the start and stop process of the scraper conveyor, but also can receive feedback signals of the signal transceiver in real time in the operation process of the scraper conveyor, the feedback signals of the signal transceiver are further analyzed and processed, and the working state of the scraper conveyor is judged. The signal receiving and transmitting device is electrically connected with the piezoelectric vibrator, the electric signals of each period of the piezoelectric vibrator can be fed back to the computer, the computer judges the working condition of the current scraper conveyor according to the characteristics of the electric signals, if the current scraper conveyor is in time processed, the damage to the scraper chain caused by larger impact in the starting and stopping process of the scraper conveyor is prevented, the reliability of the operation process of the scraper conveyor is also improved, the real-time monitoring in the operation process is also realized to a certain extent due to larger impact caused by chain transmission hysteresis in the starting and stopping process, hidden danger caused by lack of supervision in the operation process is prevented, the safety and reliability of the operation process of the scraper conveyor are improved, the potential safety hazard caused by the impact and the monitoring are avoided, the stability of the operation process is obviously improved due to the staged starting and stopping, the requirement on the strength of the scraper chain is also reduced, the cost is improved, and a new idea is created for the synchronous control of the driving of multiple motors.
Additional features and advantages of the invention will be set forth in part in the detailed description which follows.
Drawings
FIG. 1 is a schematic diagram of a multi-point drive scraper conveyor synchronization control system provided by an embodiment of the present invention;
FIG. 2 is a schematic layout of a multi-stage motor assembly provided by an embodiment of the present invention;
fig. 3 is a computer control flow chart provided by an embodiment of the present invention.
Reference numerals in the drawings of the specification include:
the device comprises a 1-scraping plate, a 2-primary motor, a 3-signal receiving and transmitting device, a 4-secondary motor, a 5-scraping plate chain, a 6-tertiary motor, a 7-A/D converter, an 8-computer, a 9-piezoelectric vibrator, a 10-quaternary motor and an 11-penta motor.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention.
In the description of the present invention, it should be understood that the terms "left", "right", "vertical", "horizontal", "top", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
In the description of the present invention, unless otherwise specified and defined, it should be noted that the terms "mounted," "connected," and "coupled" are to be construed broadly, and may be, for example, mechanical or electrical, or may be in communication with each other between two elements, directly or indirectly through intermediaries, as would be understood by those skilled in the art, in view of the specific meaning of the terms described above.
In order to solve the problems of the prior art, as shown in fig. 1 to 3, the present invention provides a synchronization control system for a multi-point driving scraper conveyor, which is disposed on the scraper conveyor, the scraper conveyor comprises a scraper chain 5 and a scraper 1 disposed on the scraper chain 5,
the multipoint driving scraper conveyor synchronicity control system comprises a first-stage motor 2 arranged at two ends of the inner side of a scraper chain 5 and a multistage motor set arranged between the two first-stage motors 2;
the output ends of the first-stage motor 2 and each motor in the multi-stage motor group are respectively provided with a chain wheel, and the chain wheels are connected with the scraper chain 5 in a meshed manner and are used for driving the scraper chain 5 to move;
each motor in the primary motor 2 and the multi-stage motor group is provided with a piezoelectric vibrator 9;
each motor in piezoelectric vibrator 9, one-level motor 2 and the multistage motor group all is connected with computer 8, and when scraper conveyor worked, piezoelectric vibrator 9 receives the electric current of different intensity when different pressures or vibration can produce, and piezoelectric vibrator 9 sends the electric current intensity signal for computer 8, and computer 8 judges scraper conveyor's operating condition according to the electric current intensity signal to control each motor work in one-level motor 2 and the multistage motor group, realize controlling scraper conveyor's start-stop work.
In the invention, the multistage motor group comprises a plurality of motors, the one-stage motor 2 and each motor in the multistage motor group are arranged on the scraper conveyor, the middle groove of the existing scraper conveyor can be adjusted according to the installation requirement of each motor, the installation of each motor is realized, the motor works to drive the chain wheel at the output end of the motor to rotate, and the chain wheel drives the scraper chain 5 to move to realize the operation of the scraper conveyor. When the scraper conveyor works, each motor is subjected to vibration and pressure from the scraper conveyor, each motor is provided with a piezoelectric vibrator 9, a current intensity signal can be generated under the condition of the vibration and pressure received by the piezoelectric vibrator 9, and the current intensity signal is fed back to the computer 8 through the signal transceiver 3 and the A/D converter 7.
Each motor in the one-stage motor 2 and the multi-stage motor group is provided with a signal receiving and transmitting device 3, a piezoelectric vibrator 9 of each motor is connected with the signal receiving and transmitting device 3 on the same motor, and the signal receiving and transmitting device 3 is connected with a computer 8 through an A/D converter 7.
In the invention, the signal transceiver 3, the A/D converter 7, the piezoelectric vibrator 9 and the computer 8 are all connected and communicated, in particular, the signal transceiver 3 is electrically connected with the A/D converter 7 and the piezoelectric vibrator 9, the A/D converter 7 is electrically connected with the computer 8, communication can be completed between the signal transceiver 3 and the computer 8, the signal transceiver 3 can receive a current intensity signal fed back by the piezoelectric vibrator 9, and meanwhile, the current signal is processed (converted into a digital signal) by the A/D converter 7 and then transmitted to the computer 8, the computer 8 judges according to the current intensity, and further controls the work of each motor according to the judging result, and the signal transceiver 3 can also accurately receive the current response of the computer 8, and each motor works according to the signal sent by the computer 8, so that the reliability of the operation process of the scraper conveyor is ensured.
The specific process of the computer 8 for judging the working state of the scraper conveyor according to the current intensity signal is as follows:
after the computer 8 sets a preset current intensity interval through a built-in program and the piezoelectric vibrators 9 of the two primary motors 2 and each motor in the multi-stage motor group send the real-time current intensity to the computer 8, the computer 8 respectively judges the real-time current intensity of each piezoelectric vibrator 9 according to the preset current intensity interval as follows:
if the real-time current intensity is within the preset current intensity interval, the computer 8 judges that the scraper conveyor and the corresponding position of the piezoelectric vibrator 9 work normally;
if the real-time current intensity is not in the preset current intensity interval, the computer 8 judges that the corresponding positions of the scraper conveyor and the piezoelectric vibrator 9 work abnormally, and the computer 8 firstly controls the motor where the piezoelectric vibrator 9 is positioned to stop working and then sequentially controls the rest motors to stop working.
When the computer 8 sequentially controls the rest motors to stop working, the rest motors are sequentially controlled to stop working by taking the motor which stops working firstly as a center according to the sequence from near to far.
In the invention, when the scraper conveyor works normally, the real-time current intensity of all the piezoelectric vibrators 9 is within a preset current intensity interval. The scraper conveyor can appear great vibration and impact when work is unusual to can take place the change of pressure, if overload or local impact pressure must increase, if the scraper chain 5 appears appearing breaking the chain, the pressure drops sharply can appear in the broken chain position, piezoelectric vibrator 9 installs on each motor, piezoelectric vibrator 9 can produce the current signal under vibration and pressure effect, the current signal can take place obvious change when the scraper conveyor operation appears unusual, the current signal appears obvious unusual, scraper conveyor operation must have hidden danger, computer 8 needs control scraper conveyor shut down. The piezoelectric vibrator 9 and the signal transceiver 3 are communicated, a current intensity signal generated by the piezoelectric vibrator 9 is fed back to the computer 8, a processing program is arranged in the computer 8, if the current signal of the piezoelectric vibrator 9 of a certain motor is too strong or too low, namely, the real-time current intensity is larger than the maximum value of a preset current intensity interval or smaller than the minimum value of a preset current intensity interval, the piezoelectric vibrator 9 of the motor is proved to be subjected to abnormal pressure or abnormal vibration, the position of the piezoelectric vibrator 9 of the scraper conveyor is judged to work abnormally, namely, the scraper conveyor works abnormally at the motor, the scraper conveyor needs to be stopped for maintenance, the computer 8 firstly controls the motor at the abnormal position to stop working, then sequentially controls the rest motors from the near to the far, the impact is reduced as much as possible, and secondary damage caused by the stopping process is prevented. The computer 8 controls the motor at the normal working position to stop according to the sequence from the near to the far no matter the working of the scraper conveyor is abnormal at one motor position or a plurality of motor positions, of course, the computer 8 can also set the stop interval, when one or a plurality of positions of the scraper conveyor is abnormal, the motor at the abnormal working position is controlled to stop working firstly, then the motor at the normal working position is controlled to stop according to the set stop interval, the invention not only realizes the real-time monitoring of the operation state of the scraper conveyor, but also can drive the scraper conveyor to stop, and the stop process stops each motor step by step, thereby avoiding the damage to the scraper conveyor caused by sudden stop.
The multistage motor group comprises a second-stage motor 4, a third-stage motor 6, a fourth-stage motor 10 and a fifth-stage motor 11 which are sequentially arranged between two first-stage motors 2, wherein the second-stage motor 4, the third-stage motor 6, the fourth-stage motor 10 and the fifth-stage motor 11 are all connected with a computer, and when the scraper conveyor works normally, the computer 8 controls the second-stage motor 4, the third-stage motor 6, the fourth-stage motor 10, the fifth-stage motor 11 and the two first-stage motors 2 to start and stop in a grading manner, and the specific process is as follows:
if the scraper chain 5 moves clockwise, the scraper conveyor is started in a grading way: the computer firstly controls the two first-stage motors 2 to start simultaneously, and then controls the second-stage motor 4, the third-stage motor 6, the fourth-stage motor 10 and the fifth-stage motor 11 to start sequentially; the grading stopping mode of the scraper conveyor is as follows: the computer firstly controls the five-stage motor 11 to stop working, then sequentially controls the four-stage motor 10, the three-stage motor 6 and the two-stage motor 4 to stop working, and finally controls the two first-stage motors 2 to stop working at the same time;
if the scraper chain 5 moves anticlockwise, the scraper conveyor is started in a grading way: the computer firstly controls the two first-stage motors 2 to start simultaneously, and then controls the five-stage motor 11, the four-stage motor 10, the three-stage motor 6 and the two-stage motor 4 to start sequentially; the grading stopping mode of the scraper conveyor is as follows: the computer firstly controls the second-stage motor 2 to stop working, then sequentially controls the third-stage motor 6, the fourth-stage motor 10 and the fifth-stage motor 11 to stop working, and finally controls the two first-stage motors 2 to stop working simultaneously.
In this embodiment, piezoelectric vibrators 9 are mounted on the two primary motors 2, the two secondary motors 4, the three-stage motor 6, the four-stage motor 10 and the five-stage motor 11, and the motors drive the scraper chain 5 to move through chain wheels, so that the scraper 1 is driven to move. The two primary motors 2, the secondary motor 4, the tertiary motor 6, the quaternary motor 10 and the quaternary motor 11 are uniformly controlled by the computer 8, and the computer 8 controls the motors to start and stop in a grading manner, specifically: the computer 8 distributes output power of each motor in the two primary motors 2 and the multi-stage motor group according to the pulling force required for starting and the current required driving load of the equipment, so as to control the output torque of the motors, ensure the synchronism of the operation process, and the computer 8 sets the starting interval of each motor in the primary motors 2 and the multi-stage motor group according to the preset operation speed, and starts each motor step by step according to the starting direction, and firstly starts the primary motors 2 at two ends; then, the starting sequence of the motors of all stages is reasonably arranged according to the current running direction of the scraper conveyor, if the scraper chain 5 moves clockwise as in the state of fig. 1, the motors of the two stages 2, 4, 6, 10 and 11 are started in sequence; if the scraper chain 5 moves anticlockwise, the two first-stage motors 2, the five-stage motor 11, the four-stage motor 10, the three-stage motor 6 and the two second-stage motor 4 are started in sequence, so that the stable and reliable starting process is realized, and particularly when the overall working load of the system is overlarge, the scraper conveyor is used for sharing the load required by driving each motor, the condition that the scraper chain 5 in partial positions bears overlarge load is avoided, and compared with the scraper conveyor with the motor only arranged at the end part, the impact on the scraper chain 5 in the starting process is obviously reduced, and the load of the scraper chain 5 is reduced in a step-by-step starting mode; similarly, the braking process is also step-by-step braking, so that impact on the scraper chain 5 in the stopping process is prevented, when the scraper chain rotates clockwise, the five-stage motor 11 is braked firstly, then the four-stage motor 10, the three-stage motor 6 and the two-stage motor 4 are braked in sequence, and finally the one-stage motors 2 at the two ends are braked; when rotating anticlockwise, the second-stage motor is braked firstly, then the third-stage motor 6, the fourth-stage motor 10 and the fifth-stage motor 11 are braked in sequence, and finally the first-stage motors 2 at the two ends are braked.
According to the invention, the operation process of the scraper conveyor is monitored through the multipoint drive scraper conveyor synchronization control system, the scraper conveyor is modified, a primary motor 2 (only one motor is originally) and a multistage motor group are additionally arranged, a signal transceiver 3 and a piezoelectric vibrator 9 are additionally arranged on each motor, the control of each motor by the computer 8 is realized through the signal transceiver 3, the current intensity signal of the scraper conveyor operation process is monitored through the piezoelectric vibrator 9, the piezoelectric vibrator 9 detects the pressure and vibration conditions of the motor in the scraper conveyor operation process, the operation conditions are represented by the current intensity signal through the characteristics of the piezoelectric vibrator 9, the current intensity signal is fed back to the computer 8, the current working state of the scraper conveyor is judged according to the intensity of the current intensity, the signal is converted by the A/D converter 7, the signal transmitted by the signal transceiver 3 is fed back to the computer 8, the computer 8 judges whether the current scraper conveyor operation process is abnormal or not according to the real-time current intensity, the computer 8 can judge the abnormal position of the current scraper conveyor, namely the abnormal position of the current intensity is not in the preset position of the motor, the abnormal position of the motor is close to the preset current intensity, the impact system can be stopped in the process, the abnormal position of the scraper conveyor is prevented from being stopped step by step, and the impact process is prevented from being stopped in the vicinity of the system.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the invention, the scope of which is defined by the claims and their equivalents.
Claims (2)
1. A synchronization control system of a multipoint driving scraper conveyor is arranged on the scraper conveyor, the scraper conveyor comprises a scraper chain and a scraper arranged on the scraper chain, and is characterized in that,
the multipoint driving scraper conveyor synchronicity control system comprises a first-stage motor arranged at two ends of the inner side of the scraper chain and a multistage motor group arranged between the two first-stage motors;
the output ends of the first-stage motor and each motor in the multi-stage motor group are respectively provided with a chain wheel, and the chain wheels are connected with the scraper chain in a meshed manner and are used for driving the scraper chain to move;
each motor in the one-stage motor and multi-stage motor group is provided with a piezoelectric vibrator;
each motor in the piezoelectric vibrator, the first-stage motor and the multi-stage motor group is connected with a computer, when the scraper conveyor works, the piezoelectric vibrator generates currents with different intensities when receiving different pressures or vibrations, the piezoelectric vibrator sends current intensity signals to the computer, and the computer judges the working state of the scraper conveyor according to the current intensity signals and controls each motor in the first-stage motor and the multi-stage motor group to work;
each motor in the one-stage motor and the multi-stage motor group is provided with a signal receiving and transmitting device, the piezoelectric vibrator of each motor is connected with the signal receiving and transmitting device on the same motor, and the signal receiving and transmitting device is connected with a computer through an A/D converter;
the multi-stage motor group comprises a second-stage motor, a third-stage motor, a fourth-stage motor and a fifth-stage motor which are sequentially arranged between the two first-stage motors, wherein the second-stage motor, the third-stage motor, the fourth-stage motor and the fifth-stage motor are all connected with a computer, and when the scraper conveyor works normally, the computer controls the second-stage motor, the third-stage motor, the fourth-stage motor, the fifth-stage motor and the two first-stage motors to start and stop in a grading manner;
the computer judges the working state of the scraper conveyor according to the current intensity signal as follows:
after the piezoelectric vibrators of the two primary motors and the motors in the multi-stage motor group send the real-time current intensity to the computer, the computer judges the real-time current intensity of each piezoelectric vibrator according to the preset current intensity interval as follows:
if the real-time current intensity is within the preset current intensity interval, the computer judges that the corresponding positions of the scraper conveyor and the piezoelectric vibrator work normally;
if the real-time current intensity is not in the preset current intensity interval, the computer judges that the corresponding positions of the scraper conveyor and the piezoelectric vibrator work abnormally, and the computer firstly controls the motor where the piezoelectric vibrator is positioned to stop working and then sequentially controls the rest motors to stop working;
when the computer sequentially controls the rest motors to stop working, the computer sequentially controls the rest motors to stop working by taking the motor which stops working firstly as a center according to the sequence from near to far.
2. The multi-point drive scraper conveyor synchronicity control system of claim 1, wherein the computer controls the secondary motor, the tertiary motor, the quaternary motor, the penta-stage motor, and the two primary motors in steps as follows:
if the scraper chain moves clockwise, the scraper conveyor is started in a grading way: the computer firstly controls two first-stage motors to start simultaneously, and then controls a second-stage motor, a third-stage motor, a fourth-stage motor and a fifth-stage motor to start sequentially; the grading stopping mode of the scraper conveyor is as follows: the computer firstly controls the five-stage motor to stop working, then sequentially controls the four-stage motor, the three-stage motor and the two-stage motor to stop working, and finally controls the two first-stage motors to stop working at the same time;
if the scraper chain moves anticlockwise, the scraper conveyor is started in a grading way: the computer firstly controls two first-level motors to start simultaneously, and then controls a fifth-level motor, a fourth-level motor, a third-level motor and a second-level motor to start sequentially; the grading stopping mode of the scraper conveyor is as follows: the computer firstly controls the second-level motor to stop working, then sequentially controls the third-level motor, the fourth-level motor and the fifth-level motor to stop working, and finally controls the two first-level motors to stop working simultaneously.
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