CN111495570A - Automatic rotating speed adjusting device and method for shallow groove scraper - Google Patents
Automatic rotating speed adjusting device and method for shallow groove scraper Download PDFInfo
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- 238000000034 method Methods 0.000 title claims description 24
- 238000012544 monitoring process Methods 0.000 claims abstract description 28
- 230000033228 biological regulation Effects 0.000 claims abstract description 11
- 239000003245 coal Substances 0.000 claims description 12
- 230000001105 regulatory effect Effects 0.000 claims description 8
- 238000005299 abrasion Methods 0.000 claims description 6
- 230000005611 electricity Effects 0.000 claims description 6
- 230000001133 acceleration Effects 0.000 claims description 5
- 238000002360 preparation method Methods 0.000 claims description 4
- 238000004590 computer program Methods 0.000 description 11
- 230000006870 function Effects 0.000 description 8
- 230000000694 effects Effects 0.000 description 6
- 238000000926 separation method Methods 0.000 description 5
- 238000004891 communication Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000010878 waste rock Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
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- 230000003247 decreasing effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
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- 239000000725 suspension Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B5/00—Washing granular, powdered or lumpy materials; Wet separating
- B03B5/28—Washing granular, powdered or lumpy materials; Wet separating by sink-float separation
- B03B5/30—Washing granular, powdered or lumpy materials; Wet separating by sink-float separation using heavy liquids or suspensions
- B03B5/36—Devices therefor, other than using centrifugal force
- B03B5/40—Devices therefor, other than using centrifugal force of trough type
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B11/00—Feed or discharge devices integral with washing or wet-separating equipment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B13/00—Control arrangements specially adapted for wet-separating apparatus or for dressing plant, using physical effects
- B03B13/04—Control arrangements specially adapted for wet-separating apparatus or for dressing plant, using physical effects using electrical or electromagnetic effects
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B11/00—Feed or discharge devices integral with washing or wet-separating equipment
- B03B2011/006—Scraper dischargers
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Abstract
The embodiment of the disclosure provides an automatic speed regulation device for shallow groove scrapers, which comprises a frequency converter and a control unit, wherein the control unit is configured to: monitoring working parameters of a driving motor of the scraper; judging the load condition of the scraper according to the working parameters; sending a control signal to the frequency converter at least according to the load condition so as to adjust the working state of the driving motor; wherein the operating parameter comprises an operating current of the drive motor; the operating state includes the rotational speed or the start-stop state of the drive motor.
Description
Technical Field
The embodiment of the disclosure relates to a device and a method for automatically adjusting the rotating speed of a shallow groove scraper.
Background
The shallow groove scraper blade is an important component of a matched shallow groove separation system in a coal preparation plant, the shallow groove scraper blade system comprises a head wheel set, a tail wheel set, two groups of follow-up wheel sets, scraper blades, chains, a connecting plate, a guide rail and the like, and part of the structure of the shallow groove scraper blade system is shown in figure 1. The scraper blade is fixed between the chains at two sides through the connecting plate, the chains are hung on the chain wheels at two sides of the head wheel set, the tail wheel set and the follow-up wheel set, and the lower ends of the chains are embedded into the guide rail sliding grooves. The main working principle of the shallow groove scraper is that light coal floats on the upper part of suspension liquid after the shallow groove separation, gangue sinks on the bottom, the scraper at the bottom of the groove lifts the gangue to move up to the inclined plane of the shallow groove and enters a gangue chute of a machine head, separation of clean coal and the gangue is realized, and the purpose of separation is achieved.
Disclosure of Invention
The embodiment of the disclosure provides an automatic rotational speed adjusting device for a shallow slot scraper, which can adjust the rotational speed according to the actual load of the scraper by adding a frequency conversion speed regulation function, thereby realizing the efficiency optimization of a shallow slot sorting system.
The shallow slot scraper blade rotational speed automatic regulating apparatus that this disclosed embodiment provided includes converter and control unit, wherein, the control unit is configured as: monitoring working parameters of a driving motor of the scraper; judging the load condition of the scraper according to the working parameters; sending a control signal to the frequency converter at least according to the load condition so as to adjust the working state of the driving motor; wherein the operating parameter comprises an operating current of the drive motor; the operating state includes the rotational speed or the start-stop state of the drive motor.
For example, the frequency converter is disposed on an electrical line between the drive motor and an electrical control cabinet.
For example, the control unit is connected with the electrical control cabinet, the frequency converter and the driving motor; the driving motor is provided with a current mutual inductance device, and the control unit monitors the working parameters by reading current signals collected by the current mutual inductance device in real time.
For example, the control unit is a P L C controller, wherein the P L C controller is connected with the frequency converter through a shielded cable, and the P L C controller inputs the frequency of the driving motor to be adjusted into the frequency converter in the form of a current signal through the shielded cable.
For example, the judging of the load condition of the scraper according to the working parameters comprises the steps of representing that the load of the scraper is large and the current shallow groove gangue discharge capacity is insufficient when the current signal is larger than a first set threshold value, representing that the load of the scraper is small and the abrasion of the shallow groove is large when the current signal is smaller than a second set threshold value, sending a control signal to the frequency converter at least according to the load condition to adjust the working state of the driving motor, and realizing acceleration adjustment of the driving motor by increasing the frequency of the P L C controller to output a corresponding current signal and sending the increased current signal to the frequency converter when the scraper is in the state of large load, and realizing the deceleration adjustment of the driving motor by reducing the frequency of the P L C controller to output a corresponding current signal and sending the reduced current signal to the frequency converter when the scraper is in the state of small load.
For example, in some embodiments, the automatic shallow groove scraper rotation speed adjusting device further comprises a monitoring unit, the monitoring unit is connected with the control unit, and the monitoring unit is configured to visually display the operation of the control unit.
For example, in some embodiments, the automatic shallow groove scraper rotation speed adjusting device further comprises a switch, and the control unit and the monitoring unit are interconnected through the switch.
The embodiment of the disclosure also provides an automatic adjustment method for the rotation speed of the shallow groove scraper, which comprises the following steps: monitoring working parameters of a driving motor of the scraper; judging the load condition of the scraper according to the working parameters; sending a control signal to the frequency converter at least according to the load condition so as to adjust the working state of the driving motor; wherein the operating parameter comprises an operating current of the drive motor; the operating state includes the rotational speed or the start-stop state of the drive motor.
For example, in some embodiments, the automatic shallow groove scraper rotation speed adjustment method sends a control word to the frequency converter at least according to the load condition, so as to realize start-stop control of the drive motor; or automatically adjusting the output frequency of the frequency converter according to the coal preparation processing amount and the load condition of the driving motor so as to adjust the rotating speed of the scraper.
For example, in some embodiments, the method for automatically adjusting the rotational speed of the shallow groove scraper further comprises monitoring an electrical control cabinet and sending a control signal to the electrical control cabinet so that the electrical control cabinet electrically transmits power to the frequency converter.
For example, in some embodiments, the automatic speed adjustment method for the shallow groove scraper further comprises monitoring the value of current flowing through the driving motor; judging the load condition of the shallow slot scraper according to the current value; and generating a target current signal according to the load condition, and transmitting the target current signal to the frequency converter so as to adjust the rotating speed of the driving motor.
The embodiment of the disclosure also provides a computer-readable storage medium, on which a computer program is stored, where the computer program is executed by a processor to implement the steps in the above method for automatically adjusting the rotational speed of the shallow slot scraper.
The embodiment of the disclosure also provides an electronic device, which includes a memory, a processor and a computer program stored in the memory, and when the processor executes the computer program, the steps in the above method for automatically adjusting the rotational speed of the shallow slot scraper are implemented.
Drawings
To more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings of the embodiments will be briefly introduced below, and it is apparent that the drawings in the following description relate only to some embodiments of the present disclosure and are not limiting to the present disclosure.
FIG. 1 is a front view configuration of a prior art shallow slot flight system;
FIG. 2 is a block diagram of an automatic rotational speed adjustment device for shallow groove scrapers according to an embodiment of the disclosure;
FIG. 3 is a schematic diagram of an automatic rotational speed adjustment device for shallow groove scrapers according to an embodiment of the disclosure;
FIG. 4 is a flow chart of a method for automatically adjusting the rotational speed of a shallow groove scraper according to an embodiment of the present disclosure;
fig. 5 is a block diagram of an electronic device provided in an embodiment of the disclosure.
Detailed Description
The technical solutions in the embodiments of the present disclosure will be described more fully hereinafter with reference to the non-limiting exemplary embodiments shown in the accompanying drawings and detailed in the following description, taken in conjunction with the accompanying drawings, which illustrate, more fully, the exemplary embodiments of the present disclosure and their various features and advantageous details. It should be noted that the features illustrated in the drawings are not necessarily drawn to scale. The examples given in this disclosure are intended merely to facilitate an understanding of ways in which the example embodiments of the disclosure may be practiced and to further enable those of skill in the art to practice the example embodiments. Thus, these examples should not be construed as limiting the scope of the embodiments of the disclosure.
Unless otherwise specifically defined, technical or scientific terms used herein shall have the ordinary meaning as understood by those of ordinary skill in the art to which this disclosure belongs. The same or similar reference numerals in the present disclosure denote the same or similar components. The references to "first" and "second" … … in this disclosure are for convenience only and do not necessarily result in their belonging to different physical entities. That is, the first detection device and the second detection device described in the embodiments of the present disclosure may be the same physical entity.
Referring to fig. 1, the inventor of the present disclosure finds in research that the currently common operation mode of the shallow trench scraper is that after the shallow trench sorting system is started, the driving motor of the shallow trench scraper is started to start operation, and the driving motor of the shallow trench scraper continues to operate at a constant frequency in the whole sorting process. In the earlier stage of system work, under the working condition of less coal quantity, the load is less, so that the electric energy is wasted, and the abrasion of parts such as gears, bearings and the like is increased; under the working condition that the coal washing treatment capacity of the system is large, the waste rock discharge effect is poor, the shallow groove scraper can be pressed by the waste rock, the medium and the coal are deposited together, the treatment is very difficult, the maintenance cost is increased, and the working efficiency of the separation system is greatly reduced.
In summary, the main disadvantages of the conventional operation method of the shallow groove scraper are: firstly, in the whole production operation process, the scraper driving motor always works in a fixed-frequency working mode, so that the load is uneven, the electric energy is wasted, and the maintenance cost is increased; and secondly, the intelligent degree is not high, the rotating speed cannot be adjusted in real time according to the actual load, and the production efficiency of the shallow slot sorting system is reduced.
As shown in fig. 2, an embodiment of the present disclosure provides an automatic shallow slot blade rotation speed adjustment apparatus 100, which includes a frequency converter 120 and a control unit 110, where the control unit 120 is configured to: monitoring working parameters of a driving motor of the scraper; judging the load condition of the scraper according to the working parameters; sending a control signal to the frequency converter at least according to the load condition so as to adjust the working state of the driving motor; wherein the operating parameter comprises an operating current of the drive motor; the operating state includes the rotational speed or the start-stop state of the drive motor.
In some embodiments, the frequency converter 110 is disposed on an electrical line between the drive motor and the electrical control cabinet.
In some embodiments, a control unit 120 is connected to the electrical control cabinet, the frequency converter and the driving motor, wherein the driving motor is provided with a current transformer, and the control unit monitors the operating parameters by reading a current signal collected by the current transformer in real time, for example, the control unit 120 is a P L C controller, wherein the P L C controller is connected to the frequency converter through a shielded cable, and the P L C controller inputs the frequency of the driving motor to be adjusted to the frequency converter through the shielded cable in the form of a current signal.
In some embodiments, the judging of the scraper load condition according to the working parameters includes that when the current signal is greater than a first set threshold, the scraper load is characterized to be large, and the current shallow groove gangue discharge capacity is insufficient, when the current signal is less than a second set threshold, the scraper load is characterized to be small, and the current shallow groove load is low, the abrasion is large, the sending of the control signal to the frequency converter at least according to the scraper load condition and the adjustment of the driving motor working state includes that when the scraper is in the high load state, the P L C controller increases the frequency to output a corresponding current signal and sends the increased current signal to the frequency converter to achieve acceleration adjustment of the driving motor, and when the scraper is in the low load state, the P L C controller decreases the frequency to output a corresponding current signal and sends the decreased current signal to the frequency converter to achieve deceleration adjustment of the driving motor.
In some embodiments, the shallow groove scraper rotation speed automatic adjusting device 100 further comprises a monitoring unit, wherein the monitoring unit is connected with the control unit and is configured to visually display the operation of the control unit.
In some embodiments, the automatic shallow slot scraper rotation speed adjusting device 100 further comprises a switch, and the control unit and the monitoring unit are interconnected through the switch.
Example 1
As shown in fig. 3, in the present example, a frequency converter 5 (i.e., the frequency converter 110 shown in fig. 2) is added to an electrical line between the driving motor 6 and the electrical control cabinet 1, a set of P L C controller (used for executing the function of the control unit 120 shown in fig. 2), the P L C controller can monitor working parameters of the scraper driving motor 6 including but not limited to (signals of operation, fault, power up, current, etc.) and issue corresponding control words (realized in the form of a communication bus) and control signals (realized in the form of 4-20mA current signals) to the frequency converter 5 through the P L C controller, after the frequency converter 5 receives a control command from the P L C controller 2, a power supply loop of the driving motor 6 can be switched on and off, so as to realize start and stop control of the scraper driving motor 6, the P L C controller 2 monitors the working current of the driving motor 6 in real time, simultaneously performs intelligent regulation, and simultaneously performs intelligent regulation according to the current and the operating load of the scraper driving motor 6, thereby realizing that the automatic proportional control of the sorting system can be performed under the conditions of the PID control system, wherein the automatic sorting system can be performed through the PID control of the load of the sorting system.
The present example workflow is briefly described below in conjunction with fig. 3.
The power electricity is introduced into an electrical control cabinet 1, the electrical control cabinet 1 controls equipment such as a contactor, an auxiliary relay, a rotary switch and a control cabinet button (relevant units are not shown in the figure) in the electrical control cabinet 1 through weak current control signals between the electrical control cabinet 1 and a P L C controller 2 (namely a control unit 120 in figure 2), the electrical control cabinet 1 transmits the power electricity to a frequency converter 5 (namely a frequency converter 110 shown in figure 2) through the attraction of the contactor under the control of the P L C controller 2, the frequency converter 5 performs analog quantity current signal data communication between a shielded cable and the P L C controller 2, the P L C controller 2 transmits the frequency (0-50Hz) of a driving motor 6 needing to be controlled to the frequency converter 5 through current signals (4-20mA), the frequency converter 5 converts the input current signals into control currents of the driving motor 6 through a control circuit at the frequency of 0-50Hz corresponding to achieve the function of controlling the driving motor 6, the P L C controller controls a speed regulator 2 to increase the current of the current through the driving motor driving current signals, read the current of the current under-load, and read the current of the current transformer, and directly increase the current load.
When the current of the driving motor 6 is too large, which indicates that the shallow slot load is too large, the gangue discharge effect is possibly poor, and the gangue possibly presses the shallow slot scraper, at this time, after the actual current value is compared with a first set threshold current value (a current empirical value with more uniform shallow slot load, and different ideal current values are determined according to different specifications of shallow slot driving motors) by the P L C controller 2, the actual current value is larger than the first set threshold value, and a 4-20mA signal corresponding to the frequency output is increased by a PID automatic control program, so that the acceleration regulation function of the driving motor 6 is realized, so that the gangue discharge effect is improved, and when the current of the driving motor 6 is too small, which indicates that the shallow slot is under the working condition with less coal load, because the load is smaller, the electric energy is wasted, and the abrasion of the components such as a gear and a bearing is increased, at this time, after the actual current value is compared with a second set threshold value by the P L C controller 2, the actual current value is smaller than the set current value, and the frequency output a 4-20mA signal corresponding to the deceleration is reduced by the PID.
Example two
As shown in fig. 3, in this example, a frequency converter 5 (i.e., the frequency converter 110 shown in fig. 2) is added to an electrical circuit between electrical control cabinets 1 of driving motors 6, and a set of P L C controllers (i.e., the control unit 120) can monitor the scraper driving motors 6, when shallow slots need to be started for work sorting, corresponding control words (including but not limited to Modbus protocol, DeviceNet fieldbus protocol, control net network protocol, etc.) are issued to the frequency converter 5 through the P L C controller, so that start-stop control of the scraper driving motors 6 can be realized, working currents of the driving motors 6 can be monitored in real time, and intelligent adjustment logic is developed, according to current feedback of the driving motors 6, coal sorting throughput of the current sorting system and load conditions of the driving motors 6 can be judged, and through PID logic written in a P L C program in advance, output frequency of the frequency converter 5 can be automatically adjusted, so that the rotation speed of the scraper system can be operated under a reasonable working condition all the time.
When the current of the driving motor 6 is too large, which indicates that the shallow slot load is too large, the gangue discharge effect is possibly poor, and the gangue possibly presses the shallow slot scraper, at this time, after the P L C controller 2 compares the actual current value with the set ideal current value (the current empirical value of the shallow slot load is relatively uniform, and the data determines different ideal current values according to different specifications of shallow slot driving motors) and the actual current value is larger than the set current value, the frequency is increased through a PID automatic control program to output a corresponding 4-20mA signal, so that the acceleration regulation function of the driving motor 6 is realized, so that the gangue discharge effect is improved, and when the current of the driving motor 6 is too small, which indicates that the shallow slot is under the working condition with less coal load, because the load is smaller, the electric energy is wasted, so that the abrasion of parts such as a gear, a bearing and the like is increased, at this time, after the actual current value is smaller than the set current value is compared by the P L C controller 2, the frequency is reduced through the PID automatic control program to output a corresponding 4-20mA signal, so that.
The present example workflow is briefly described below in conjunction with fig. 3.
The power electricity is introduced into an electrical control cabinet 1, the electrical control cabinet 1 controls equipment such as a contactor, an auxiliary relay, a rotary switch and a control cabinet button (relevant units are not shown in the figure) in the electrical control cabinet 1 through weak current control signals between the electrical control cabinet 1 and a P L C controller 2 (namely a control unit 120 in figure 2), the electrical control cabinet 1 transmits the power electricity to a frequency converter 5 (namely a frequency converter 110 shown in figure 2) through the attraction of the contactor under the control of the P L C controller 2, the frequency converter 5 performs data communication with the P L C controller 2, the P L C controller 2 transmits an adjusted output signal to the frequency converter 5 in a 4-20mA current mode, the frequency converter 5 outputs a control current of a driving motor 6 according to an input current signal to achieve the function of the driving motor 6, the P L C controller 2 reads a real-time current signal through a current transformer added by the driving motor 6, and the real-time current can directly feed back the current load condition of a current shallow slot scraper (the current is large, the current is large in a waste rock discharge capacity, the current is small, the current is increased, and the current is small.
Different from the above example, the P L C controller 2 of the present example is connected to the monitoring computer 4 through the switch 3, the monitoring computer 4 implements the editing and downloading of the P L C controller 2 logic program, performs PID adjustment according to the actual current value of the driving motor 6, the current is large and the load is large, the logic adjustment controller increases the frequency output and increases the rotation speed of the shallow slot motor to improve the shallow slot gangue discharge capability, the current is small and the load is small, the logic adjustment controller decreases the frequency output, reduces the rotation speed of the shallow slot motor, reduces the wear of the gear and the bearing, adjusts the frequency output of the frequency converter 5 in real time, and achieves the automatic adjustment function of the rotation speed of the shallow slot scraper.
As shown in fig. 4, an embodiment of the present disclosure further provides an automatic shallow groove scraper rotation speed adjustment method, where the method may include: 301, monitoring working parameters of a driving motor of a scraper; step 302, judging the load condition of the scraper according to the working parameters; 303, sending a control signal to the frequency converter at least according to the load condition to adjust the working state of the driving motor; wherein the operating parameter comprises an operating current of the drive motor; the operating state includes the rotational speed or the start-stop state of the drive motor.
In some embodiments, the automatic speed adjustment method for the shallow groove scraper sends control words to the frequency converter at least according to the load condition, so as to realize start-stop control of the driving motor; or automatically adjusting the output frequency of the frequency converter according to the coal preparation processing amount and the load condition of the driving motor so as to adjust the rotating speed of the scraper.
In some embodiments, the automatic shallow groove scraper rotation speed adjusting method further comprises monitoring an electrical control cabinet and sending a control signal to the electrical control cabinet so that the electrical control cabinet transmits power electricity to the frequency converter.
For example, the target current can comprise an increased current signal obtained by increasing the frequency of the P L C controller to output a corresponding current signal, when the scraper is in a large load state, and a reduced current signal obtained by reducing the frequency of the P L C controller to output a corresponding current signal, when the scraper is in a small load state.
The parts of the shallow groove scraper rotating speed automatic regulating method similar to the automatic regulating device are not described in detail herein.
The disclosed embodiment also provides a computer readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the computer program realizes part or all of the steps of the above shallow slot scraper rotation speed automatic regulation method.
For example, in some embodiments, the computer program when executed by a processor may implement the steps of: monitoring working parameters of a driving motor of the scraper; judging the load condition of the scraper according to the working parameters; sending a control signal to the frequency converter at least according to the load condition so as to adjust the working state of the driving motor; wherein the operating parameter comprises an operating current of the drive motor; the operating state includes the rotational speed or the start-stop state of the drive motor.
The embodiment of the present disclosure further provides an electronic device 500, where the electronic device 500 includes a memory 510, a processor 520, and a computer program stored in the memory, and when the processor 520 executes the computer program, part or all of the steps of the above shallow slot scraper rotation speed automatic adjustment method are implemented.
Processor 520 executes the computer program to implement at least the following steps: monitoring working parameters of a driving motor of the scraper; judging the load condition of the scraper according to the working parameters; sending a control signal to the frequency converter at least according to the load condition so as to adjust the working state of the driving motor; wherein the operating parameter comprises an operating current of the drive motor; the operating state includes the rotational speed or the start-stop state of the drive motor.
The shallow slot sorting system has the advantages that the frequency conversion and speed regulation functions are added, the rotating speed regulation is realized according to the actual load of the scraper, the conventional fixed-frequency and constant-speed regulation mode is abandoned, the efficiency optimization of the shallow slot sorting system is realized, the automatic control program is added through the P L C controller, when the shallow slot operation needs to be started, the control parameters are firstly sent to the frequency converter, the frequency converter is controlled to be switched on and off a shallow slot motor power circuit through control words, the frequency converter outputs different voltage and current power, the shallow slot operates at different rotating speeds, the monitoring of the shallow slot working conditions (operation, fault and current) is realized, the large current load is large, the shallow slot gangue discharge capacity is improved through increasing the rotating speed of the motor, the small current load is small, the service life of the shallow slot is prolonged through reducing the rotating speed of the motor, the energy-saving effect is achieved, the intelligentization degree of the shallow slot sorting system is improved, the operation parameters, the fault and fault are more stable and reliable, the workload of manual intervention is reduced, the labor cost is reduced for a producer to a certain extent, the producer is reduced, the data parameters in the P L C controller are displayed in a graphical interface mode of a monitoring computer, the operation interface is realized, the hidden danger of the visualized operation of the on-site control of the on-off and on-site operation of the control of the shallow slot.
It should be noted that the embodiment of the present disclosure may be used to control not only a multimedia playing device such as a smart television, but also other intelligent devices, and the present disclosure is not limited herein. The above description is only for the specific embodiments of the present disclosure, but the scope of the present disclosure is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present disclosure, and all the changes or substitutions should be covered within the scope of the present disclosure. Therefore, the protection scope of the present disclosure shall be subject to the protection scope of the claims.
Claims (10)
1. The device for automatically regulating the rotating speed of the shallow groove scraper is characterized by comprising a frequency converter and a control unit, wherein,
the control unit is configured to:
monitoring working parameters of a driving motor of the scraper;
judging the load condition of the scraper according to the working parameters; and
sending a control signal to the frequency converter at least according to the load condition, and adjusting the working state of the driving motor;
wherein the operating parameter comprises an operating current of the drive motor; the operating state includes the rotational speed or the start-stop state of the drive motor.
2. The shallow slot screed speed automatic adjustment device of claim 1, wherein the frequency converter is disposed on an electrical line between the drive motor and an electrical control cabinet.
3. The automatic shallow groove scraper rotating speed regulating device as claimed in claim 2, wherein the control unit is connected with the electrical control cabinet, the frequency converter and the driving motor;
the driving motor is provided with a current mutual inductance device, and the control unit monitors the working parameters by reading current signals collected by the current mutual inductance device in real time.
4. The automatic speed regulating device for shallow groove scrapers of claim 1 or 3, wherein the control unit is a P L C controller,
the P L C controller is connected with the frequency converter through a shielded cable, and the P L C controller inputs the frequency of the driving motor needing to be adjusted into the frequency converter through the shielded cable in the form of a current signal.
5. The shallow groove flight speed automatic adjustment device of claim 4,
the judging the load condition of the scraper according to the working parameters comprises the following steps:
when the current signal is greater than a first set threshold value, the characteristic is that the load of the scraper is large and the current shallow slot gangue discharge capacity is insufficient;
when the current signal is smaller than a second set threshold value, the load of the scraper is represented to be small, and the current shallow groove is small in load and large in abrasion;
the step of sending a control signal to the frequency converter at least according to the load condition to adjust the working state of the driving motor comprises the following steps:
when the scraper is in a large-load state, the P L C controller increases the frequency to output a corresponding current signal and sends the increased current signal to the frequency converter to realize the acceleration regulation of the driving motor;
when the scraper is in a low-load state, the P L C controller reduces the frequency to output a corresponding current signal and sends the reduced current signal to the frequency converter to realize the speed reduction adjustment of the driving motor.
6. The shallow slot scraper rotational speed automatic regulating apparatus of claim 1, further comprising a monitoring unit, the monitoring unit is connected with the control unit, and the monitoring unit is configured to visually display the operation of the control unit.
7. The shallow slot screed rotational speed automatic regulating apparatus of claim 6 further comprising a switch through which the control unit and the monitoring unit are interconnected.
8. A shallow slot flight speed auto-adjustment method, the method comprising:
monitoring working parameters of a driving motor of the scraper;
judging the load condition of the scraper according to the working parameters; and
sending a control signal to the frequency converter at least according to the load condition so as to adjust the working state of the driving motor;
wherein the operating parameter comprises an operating current of the drive motor; the operating state includes the rotational speed or the start-stop state of the drive motor.
9. The shallow groove flight speed automatic adjustment method of claim 8,
sending control words to the frequency converter at least according to the load condition so as to realize start-stop control of the driving motor;
or,
and adjusting the output current of the frequency converter according to the coal preparation treatment capacity and the load condition of the driving motor so as to adjust the rotating speed of the scraper.
10. The shallow groove flight speed automatic adjustment method of claim 9,
and monitoring the electrical control cabinet, and sending a control signal to the electrical control cabinet so that the electrical control cabinet transmits power electricity to the frequency converter.
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