CN114394377A - Multipoint-driving scraper conveyor synchronism control system - Google Patents
Multipoint-driving scraper conveyor synchronism control system Download PDFInfo
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- 230000001360 synchronised effect Effects 0.000 claims description 5
- 238000005065 mining Methods 0.000 abstract description 4
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- 239000003245 coal Substances 0.000 description 2
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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
Abstract
A multi-point drive scraper conveyor synchronism control system belongs to the technical field of fully mechanized mining equipment control. The multipoint driving scraper conveyor synchronism control system comprises one-level motors and a multistage motor set arranged between the two one-level motors, each motor in the one-level motors and the multistage motor set is provided with a chain wheel and a piezoelectric vibrator, each motor in the one-level motors and the multistage motor set is connected with a computer, when the scraper conveyor works, the piezoelectric vibrator sends a current intensity signal to the computer, the computer judges the working state of the scraper conveyor according to the current intensity signal, and each motor in the one-level motors and the multistage motor set is controlled to work. The multipoint driving scraper conveyor synchronization control system can realize the graded start and stop of the scraper conveyor, reduce the total tension borne by a scraper chain and improve the reliability of the working process of the system.
Description
Technical Field
The invention relates to the technical field of fully mechanized mining equipment control, in particular to a synchronous control system of a multi-point driving scraper conveyor.
Background
At present, in coal mining and transportation field, scraper conveyor has become indispensable production facility, along with the improvement of coal mining technology, long distance, heavy load work has become the normality in the scraper conveyor working process, because scraper conveyor long distance heavy load operation, if only add the motor at both ends and can lead to whole pulling force too big, require too high to the intensity of scraper chain, lead to the cost to improve, scraper conveyor relies on scraper chain transmission, certain hysteresis exists in the chain drive, long distance working process security can't guarantee.
Therefore, a better driving method is needed to effectively solve the problems of large long-distance working tension and transmission lag of the scraper conveyor.
Disclosure of Invention
In order to solve the technical problems in the prior art, the invention provides a synchronous control system of a multi-point driving scraper conveyor, which can realize the graded start and stop of the scraper conveyor, reduce the overall tensile force borne by a scraper chain, effectively avoid the influence of the overall start time and the overall start effect on the start process of the scraper conveyor due to the delay condition of the transmission of the motion state of the scraper chain, and improve the reliability of the working process of the system.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a multipoint driving scraper conveyor synchronization control system is arranged on a scraper conveyor, the scraper conveyor comprises a scraper chain and a scraper arranged on the scraper chain,
the multipoint driving scraper conveyor synchronization control system comprises primary motors arranged at two ends of the inner side of the scraper chain and a multistage motor set arranged between the two primary motors;
the output ends of the motors in the first-stage motor and the multi-stage motor set are respectively provided with a chain wheel, and the chain wheels are meshed with the scraper chain and used for driving the scraper chain to move;
each motor in the first-stage motor and the multi-stage motor set 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, scraper conveyor during operation, piezoelectric vibrator can produce the electric current of different intensity when receiving different pressure or vibration, and piezoelectric vibrator sends the current intensity signal for the computer, the operating condition of scraper conveyor is judged according to the current intensity signal to the computer to each motor work in control one-level motor and the multistage motor group realizes opening of control scraper conveyor and stops work.
Furthermore, each motor in the one-level motor and the multi-level motor set is provided with a signal transceiver, the piezoelectric vibrator of each motor is connected with the signal transceiver on the same motor, and the signal transceivers are connected with a computer through an A/D converter.
Further, the specific process of judging the working state of the scraper conveyor by the computer according to the current intensity signal is as follows:
after the real-time current intensity of the piezoelectric vibrators of each motor in the two first-level motors and the multistage motor set is sent to the computer, the computer judges the real-time current intensity of each piezoelectric vibrator respectively according to a current intensity preset interval as follows:
if the real-time current intensity is within the current intensity preset 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 within the current intensity preset interval, the computer judges that the corresponding position of the scraper conveyor and the piezoelectric vibrator works abnormally, the computer controls the motor where the piezoelectric vibrator is located to stop working first, 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 according to the sequence from near to far by taking the motor which stops working first as the center.
Further, multistage motor group is including setting gradually second grade motor, tertiary motor, level four motor and the five-stage motor between two one-level motors, second grade motor, tertiary motor, level four motor and five-stage motor all are connected with the computer, and scraper conveyor is normal during operation, computer control second grade motor, tertiary motor, level four motor, five-stage motor and two one-level motors start and stop in grades.
Further, the specific process of controlling the hierarchical starting and stopping of the second-level motor, the third-level motor, the fourth-level motor, the fifth-level motor and the two first-level motors by the computer is as follows:
if the scraper chain moves clockwise, the graded starting mode of the scraper conveyor is as follows: the computer 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 graded stopping mode of the scraper conveyor is as follows: the computer controls the five-stage motor to stop working at first, then controls the four-stage motor, the three-stage motor and the two-stage motor to stop working in sequence, and finally controls the two first-stage motors to stop working at the same time;
if the scraper chain moves anticlockwise, the graded starting mode of the scraper conveyor is as follows: the computer controls two first-stage motors to start simultaneously, and then controls a fifth-stage motor, a fourth-stage motor, a third-stage motor and a second-stage motor to start sequentially; the graded stopping mode of the scraper conveyor is as follows: the computer controls the second-stage motor to stop working at first, then controls the third-stage motor, the fourth-stage motor and the fifth-stage motor to stop working in sequence, and finally controls the two first-stage motors to stop working at the same time.
The invention has the beneficial effects that:
1) the invention can realize the graded start of the scraper conveyor in the starting process, reduce the total tension borne by the scraper chain, effectively avoid the influence of the integral starting time and the integral starting effect caused by the hysteresis condition of the transmission of the motion state of the scraper chain in the starting process of the scraper conveyor, measure the vibration and the pressure of the motor in the running process of the scraper conveyor by utilizing the piezoelectric vibrator, complete the communication between the piezoelectric vibrator and the signal transceiver, feed the current intensity back to the signal transceiver, calculate and judge the current working condition of the scraper conveyor 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 motors of the scraper conveyor are uniformly distributed in a multistage manner, 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 at a long distance and under a large load, if a driving mode of only adopting two motors at two ends can lead to overlarge tensile stress of part of the scraper chain, damage is easy to cause, when the scraper conveyor works under a large load, the chain at a large-load working section can be bent under the action of the load, therefore, the chain at the large-load working section is loosened to a certain degree relative to other positions, the loosening work of the chain at the large-load section is realized by controlling the rotating speeds of different motors, and the work of each motor is controlled by a computer, the loosening degree and the loosening position can be adjusted by the computer according to the current load condition, real-time dynamic adjustment can be realized, and the reliability of the working process of the system is improved.
3) The invention controls the start and stop of the scraper conveyor through two primary motors and a multi-stage motor set between the two primary motors, each motor is started and stopped in a grading way in the starting and stopping processes, the impact born by the scraper chain in the starting and stopping processes 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 of the whole service life of the scraper conveyor are prevented, a signal transceiver is additionally arranged, the communication with a computer is realized through an A/D converter, the signal transceiver can be ensured to effectively receive the control signal of the computer in real time, meanwhile, the information can be fed back to the computer according to the actual situation, the real-time control of the operation process of the scraper conveyor is realized, the computer not only controls the motors of the scraper conveyor to be started and stopped in order, but also can receive the feedback signal of the signal transceiver in real time in the operation process of the scraper conveyor, and further analyzing and processing the feedback signal of the signal transceiver to judge the current working state of the scraper conveyor. The signal transceiver is electrically connected with the piezoelectric vibrator, and can feed back the electric signals of the piezoelectric vibrator to the computer at each time interval, the computer judges the current working condition of the scraper conveyor according to the characteristics of the electric signals, if a problem exists, the signal can be processed in time, the damage to the scraper chain caused by the larger impact in the starting and stopping process of the scraper conveyor is prevented, the reliability of the running process of the scraper conveyor is also improved, the real-time monitoring in the running process due to the larger impact caused by chain transmission hysteresis in the starting and stopping processes is also avoided to a certain extent, the hidden danger caused by lack of supervision in the running process is prevented, the safety and reliability of the working of the scraper conveyor are improved, the hidden danger caused by the unfavorable impact and monitoring is avoided, the stability of the running process is obviously improved by staged and staged start and stop, the requirement on the strength of the scraper chain is also reduced, and the cost is improved, a new idea is created for the synchronous control of multi-motor drive.
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 diagram of a multi-stage generator set according to an embodiment of the present invention;
FIG. 3 is a flow chart of computer control provided by an embodiment of the present invention.
Reference numerals in the drawings of the specification include:
the device comprises a scraper 1, a first-stage motor 2, a signal transceiver 3, a second-stage motor 4, a scraper chain 5, a third-stage motor 6, an A/D converter 7, a computer 8, a piezoelectric vibrator 9, a fourth-stage motor 10 and a fifth-stage motor 11.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
In the description of the present invention, it is to be understood that the terms "left", "right", "vertical", "horizontal", "top", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the description of the present invention, unless otherwise specified and limited, it is to be noted that the terms "mounted," "connected," and "connected" are to be interpreted broadly, and may be, for example, a mechanical connection or an electrical connection, a communication between two elements, a direct connection, or an indirect connection via an intermediate medium, and specific meanings of the terms may be understood by those skilled in the art according to specific situations.
In order to solve the problems in the prior art, as shown in fig. 1 to 3, the invention provides a multi-point drive scraper conveyor synchronization control system, which is arranged on a scraper conveyor, wherein the scraper conveyor comprises a scraper chain 5 and a scraper 1 arranged on the scraper chain 5,
the multipoint driving scraper conveyor synchronization control system comprises primary motors 2 arranged at two ends of the inner side of a scraper chain 5 and a multistage motor set arranged between the two primary motors 2;
the output ends of the first-stage motor 2 and each motor in the multi-stage motor set are respectively provided with a chain wheel, and the chain wheels are meshed with the scraper chain 5 and are used for driving the scraper chain 5 to move;
each of the first-stage motor 2 and the multi-stage motor set is provided with a piezoelectric vibrator 9;
According to the invention, the multistage motor set comprises a plurality of motors, the primary motor 2 and each motor in the multistage motor set are all arranged on the scraper conveyor, the middle groove of the existing scraper conveyor can be adjusted according to the installation requirements of each motor, so that the installation of each motor is realized, the motor works to drive the chain wheel at the output end to rotate, and the chain wheel drives the scraper chain 5 to move so as to realize the operation of the scraper conveyor. When the scraper conveyor works, all motors are subjected to vibration and pressure from the scraper conveyor, all motors are provided with piezoelectric vibrators 9, and current intensity signals can be generated under the condition that the piezoelectric vibrators 9 are subjected to the vibration and the pressure and are fed back to the computer 8 through the signal transceiving device 3 and the A/D converter 7.
The one-level motor 2 and each motor in the multi-level motor set are provided with a signal transceiver 3, the piezoelectric vibrator 9 of each motor is connected with the signal transceiver 3 on the same motor, and the signal transceiver 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 connected and communicated with each other, 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, the communication can be completed with each other, the signal transceiver 3 can receive the current intensity signal fed back by the piezoelectric vibrator 9, meanwhile, the current signal is processed (converted into digital signal) by the A/D converter 7 and then transmitted to the computer 8, the computer 8 judges according to the current intensity, the work of each motor is further controlled according to the judgment result, in addition, 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 running process of the scraper conveyor is ensured.
The specific process of judging the working state of the scraper conveyor by the computer 8 according to the current intensity signal is as follows:
the computer 8 sets up the current intensity through built-in procedure and predetermines the interval, and the piezoelectric vibrator 9 of each motor in two one-level motors 2 and the multistage motor group all sends real-time current intensity to computer 8 after, and computer 8 predetermines the interval according to current intensity and carries out the following judgement to the real-time current intensity of every piezoelectric vibrator 9 respectively:
if the real-time current intensity is within the current intensity preset interval, the computer 8 judges that the corresponding positions of the scraper conveyor and the piezoelectric vibrator 9 work normally;
if the real-time current intensity is not within the current intensity preset interval, the computer 8 judges that the corresponding position of the scraper conveyor and the piezoelectric vibrator 9 works abnormally, the computer 8 controls the motor where the piezoelectric vibrator 9 is located to stop working first, and then controls the rest motors to stop working in sequence.
When the computer 8 controls the rest motors to stop working in sequence, the rest motors are controlled to stop working in sequence from near to far by taking the motor which stops working first as a center.
In the invention, when the scraper conveyer normally works, the real-time current intensity of all the piezoelectric vibrators 9 is within the current intensity preset interval. Great vibration and impact can appear when scraper conveyor works unusually, and can take place the change of pressure, if overload or local impact pressure must increase, if appear scraping chain 5 and appearing the broken chain, the pressure sharply descends can appear in the broken chain position, piezoelectric vibrator 9 installs on each motor, piezoelectric vibrator 9 can produce current signal under vibration and pressure effect, current signal can take place obvious change when scraper conveyor operation appears unusually, current signal appears obvious unusually, scraper conveyor operation must have hidden danger, computer 8 needs control scraper conveyor and shuts down. The piezoelectric vibrator 9 and the signal transceiver 3 are communicated with each other, the 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 the preset interval of the current intensity or the real-time current intensity is smaller than the minimum value of the preset interval of the current intensity, which indicates that the motor piezoelectric vibrator 9 is subjected to abnormal pressure or abnormal vibration, judges that the scraper conveyer works abnormally at the position of the piezoelectric vibrator 9, the scraper conveyor works abnormally at the motor and needs to be stopped for maintenance, the computer 8 firstly controls the motor at the abnormal working position to stop working and then sequentially controls the rest motors to stop from near to far, so that the impact is reduced as much as possible, and the secondary damage caused by the stopping process is prevented. No matter the scraper conveyer works abnormally at one motor position or a plurality of motor positions, the computer 8 controls the motors working normally to stop according to the sequence from near to far, of course, the computer 8 can also set the stop interval, when the scraper conveyer works abnormally at one or a plurality of positions, the motors working abnormally are firstly controlled to stop working, then the motors working normally are sequentially controlled to stop according to the set stop interval, the impact born by the scraper conveyer in the stop process is reduced as much as possible, the impact brought to the stop process due to the transmission lag of the scraper chain 5 is prevented, on one hand, the service life of the scraper chain 5 is influenced, on the other hand, hidden danger brought to the operation process of the scraper conveyer is prevented, the invention not only realizes the real-time monitoring of the operation state of the scraper conveyer, but also can drive the scraper conveyer to stop, the stop process is realized for each motor step by step, avoid the damage to the scraper conveyor caused by sudden shutdown.
Multistage motor assembly is including setting gradually second grade motor 4 between two one-level motors 2, tertiary motor 6, level four motor 10 and five-level motor 11, second grade motor 4, tertiary motor 6, level four motor 10 and five-level motor 11 all with the computer link, scraper conveyor normal during operation, computer 8 control second grade motor 4, tertiary motor 6, level four motor 10, five-level motor 11 and two one-level motors 2 start and stop in grades, specific process as follows:
if the scraper chain 5 moves clockwise, the graded starting mode of the scraper conveyor is as follows: the computer firstly controls two first-stage motors 2 to be started simultaneously, and then controls a second-stage motor 4, a third-stage motor 6, a fourth-stage motor 10 and a fifth-stage motor 11 to be started sequentially; the graded 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 graded starting mode of the scraper conveyor is as follows: the computer firstly controls two first-stage motors 2 to be started simultaneously, and then controls a fifth-stage motor 11, a fourth-stage motor 10, a third-stage motor 6 and a second-stage motor 4 to be started sequentially; the graded 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 at the same time.
In this embodiment, piezoelectric vibrator 9 is all installed to two one-level motors 2 and second grade motor 4, tertiary motor 6, level four motor 10 and level five motor 11 to, each motor passes through the sprocket and drives scraper chain 5 and remove, and then drives scraper blade 1 and remove. Two one-level motors 2 and second grade motor 4, tertiary motor 6, level four motor 10 and level five motor 11 all receive computer 8 unified control, and computer 8 controls each motor and starts and stops in grades, and is specific: the computer 8 distributes the output power of the two primary motors 2 and each motor in the multi-stage motor set according to the pulling force required by starting and the current required driving load of the equipment, so as to control the output torque of the motors and ensure the synchronism of the operation process, the computer 8 sets the starting intervals of the primary motors 2 and each motor in the multi-stage motor set according to the preset operation speed, and starts each motor step by step according to the starting direction, and firstly, the primary motors 2 at two ends are started; then, reasonably arranging the starting sequence of each level of motors according to the current running direction of the scraper conveyor, and if the scraper chain 5 moves clockwise as shown in the state of figure 1, starting the scraper chain according to the sequence of two first-level motors 2, two second-level motors 4, three-level motors 6, four-level motors 10 and five-level motors 11; if the scraper chain 5 moves anticlockwise, the scraper chain is started according to the sequence of the two first-stage motors 2, the five-stage motor 11, the four-stage motor 10, the three-stage motor 6 and the second-stage motor 4, so that the starting process is stable and reliable, especially when the overall working load of the system is overlarge, the scraper conveyor shares and drives the required load by each motor, and the condition that the part of the scraper chain 5 bears overlarge load is avoided, compared with the scraper conveyor only provided with the motor 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-step motor 11 is braked firstly, then the four-step motor 10, the three-step motor 6 and the two-step motor 4 are braked in sequence, and finally the first-step motors 2 at the two ends are braked; when the motor rotates 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 two ends are braked.
The invention monitors the operation process of the scraper conveyor by a multipoint driving scraper conveyor synchronous control system, improves the scraper conveyor, adds a primary motor 2 (only one motor originally) and a multistage motor set, adds a signal transceiver 3 and a piezoelectric vibrator 9 on each motor, realizes the control of each motor by a computer 8 through the signal transceiver 3, monitors the current intensity signal of the scraper conveyor in the operation process through the piezoelectric vibrator 9, detects the pressure and vibration condition of the motor in the operation process of the scraper conveyor by the piezoelectric vibrator 9, expresses the operation condition by the current intensity signal through the characteristic of the piezoelectric vibrator 9, feeds the current intensity signal back to the computer 8, judges the current working state of the scraper conveyor according to the intensity of the current intensity, and realizes the signal conversion by an A/D converter 7, the signal transmitted by the signal transceiver 3 is fed back to the computer 8 through conversion, the computer 8 judges whether the current operation process of the scraper conveyor is abnormal according to the real-time current intensity, moreover, the computer 8 can judge the position of the current abnormal scraper conveyor, the position of the abnormal scraper conveyor is the position of the motor of which the real-time current intensity is not in the current intensity preset interval, the computer 8 system controls the scraper conveyor to stop step by step from near to far near the position of the abnormal scraper conveyor, the impact of the stop process is reduced, the reliability of the operation process is ensured, and the secondary damage to the system caused by the impact of the stop process is prevented.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (6)
1. A multipoint driving scraper conveyor synchronization control system is arranged on a 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 synchronization control system comprises primary motors arranged at two ends of the inner side of the scraper chain and a multistage motor set arranged between the two primary motors;
the output ends of the motors in the first-stage motor and the multi-stage motor set are respectively provided with a chain wheel, and the chain wheels are meshed with the scraper chain and used for driving the scraper chain to move;
each motor in the first-stage motor and the multi-stage motor set 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, scraper conveyor during operation, piezoelectric vibrator can produce the electric current of different intensity when receiving different pressure or vibration, and piezoelectric vibrator sends the current intensity signal for the computer, the computer judges scraper conveyor's operating condition according to the current intensity signal to control each motor work in one-level motor and the multistage motor group.
2. The multipoint driving scraper conveyor synchronization control system according to claim 1, characterized in that the primary motor and each motor in the multistage motor set are provided with a signal transceiver, the piezoelectric vibrator of each motor is connected with the signal transceiver on the same motor, and the signal transceiver is connected with the computer through an A/D converter.
3. The multi-point drive scraper conveyor synchronization control system of claim 1, wherein the specific process of the computer determining the working state of the scraper conveyor according to the current intensity signal is as follows:
after the real-time current intensity of the piezoelectric vibrators of each motor in the two first-level motors and the multistage motor set is sent to the computer, the computer judges the real-time current intensity of each piezoelectric vibrator respectively according to a current intensity preset interval as follows:
if the real-time current intensity is within the current intensity preset 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 within the current intensity preset interval, the computer judges that the corresponding position of the scraper conveyor and the piezoelectric vibrator works abnormally, the computer controls the motor where the piezoelectric vibrator is located to stop working first, and then sequentially controls the rest motors to stop working.
4. The multi-point drive scraper conveyor synchronization control system of claim 3, wherein the computer sequentially controls the rest of the motors to stop working, in order from near to far, centering on the motor that stops working first.
5. The multi-point driving scraper conveyor synchronous control system of claim 1, wherein the multi-stage motor set comprises a second-stage motor, a third-stage motor, a fourth-stage motor and a fifth-stage motor which are sequentially arranged between 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 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 when the scraper conveyor normally works.
6. The multi-point drive scraper conveyor synchronization control system of claim 5, wherein the computer controls the two-stage motor, the three-stage motor, the four-stage motor, the five-stage motor and the two one-stage motors to start and stop in stages as follows:
if the scraper chain moves clockwise, the graded starting mode of the scraper conveyor is as follows: the computer 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 graded stopping mode of the scraper conveyor is as follows: the computer controls the five-stage motor to stop working at first, then controls the four-stage motor, the three-stage motor and the two-stage motor to stop working in sequence, and finally controls the two first-stage motors to stop working at the same time;
if the scraper chain moves anticlockwise, the graded starting mode of the scraper conveyor is as follows: the computer controls two first-stage motors to start simultaneously, and then controls a fifth-stage motor, a fourth-stage motor, a third-stage motor and a second-stage motor to start sequentially; the graded stopping mode of the scraper conveyor is as follows: the computer controls the second-stage motor to stop working at first, then controls the third-stage motor, the fourth-stage motor and the fifth-stage motor to stop working in sequence, and finally controls the two first-stage motors to stop working at the same time.
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