CN111774173B - Intelligent control method and system for ball mill without auxiliary machine - Google Patents
Intelligent control method and system for ball mill without auxiliary machine Download PDFInfo
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- CN111774173B CN111774173B CN201910269646.2A CN201910269646A CN111774173B CN 111774173 B CN111774173 B CN 111774173B CN 201910269646 A CN201910269646 A CN 201910269646A CN 111774173 B CN111774173 B CN 111774173B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C25/00—Control arrangements specially adapted for crushing or disintegrating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
- B02C17/18—Details
- B02C17/1805—Monitoring devices for tumbling mills
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Abstract
The invention provides an intelligent control method and a control system for a ball mill without an auxiliary machine, which comprises the steps of monitoring the rotating speed and the position of a grinding cylinder body and the running speed of a motor, judging whether a belt on the grinding cylinder body slips or not, monitoring whether the grinding cylinder body can run normally or not, sending a feed inlet or discharge outlet alignment instruction to a frequency converter to control the position of the grinding cylinder body by an operating platform and the like.
Description
Technical Field
The invention relates to the technical field of intelligent control of ball mills, in particular to an intelligent control method and system without an auxiliary machine for a ball mill.
Background
The ball mill is an important large-scale closed device for crushing and processing rough materials such as ores, the materials, the grinding steel balls and the water auxiliary materials are placed in the ball mill for grinding, and the materials are delivered according to the proportion of the components of the materials, so that the ball mill can stably run in an energy-saving mode under the condition that the grinding production quality is guaranteed.
In the existing engineering practice, a manual experience operation mode is generally adopted to control the ball mill, and the simple mode has the defects that the phenomenon of partial empty grinding or partial full grinding can be caused by excessively depending on manual experience, so that the load of the ball mill is severely fluctuated; meanwhile, the problems of alignment during material changing and excessive load caused by raw material condensation after long-term stopping time and slippage during restarting can also occur in the working process of the ball mill, the common practice of ball mill manufacturers at present is to add an auxiliary machine to solve the problems, when the alignment or the slippage starting is needed, a power source is switched from a main machine to the auxiliary machine, the auxiliary machine has a very large reduction ratio and can provide low-speed and large torque to be just suitable for solving the two problems, a feed inlet of a grinding cylinder body needs to be aligned to a feed inlet above when new raw materials are added, a discharge outlet of the grinding cylinder body needs to be aligned to material taking equipment below when the ground raw materials are taken, the process needs an operator to manually rotate the grinding cylinder body slowly through the auxiliary machine to complete, when a belt slips, the operator needs to rotate the grinding cylinder body forwards through the auxiliary machine, then rotate backwards, then rotate forwards and backwards again, and then rotate backwards again, the grinding cylinder is swung for many times to break up the condensed raw materials.
The main machine and the auxiliary machine can be completed by spending large force on operators when being switched with each other, the manual operation of aligning and swinging the grinding cylinder body also needs to depend on experience, so that the requirement on the operators is high, the caused error is large, the auxiliary machine consists of a motor and a speed reducer with dozens of kilowatts, the cost is high, the manual operation mode cannot obtain stable grinding quality, great waste can be formed in the aspects of material use and production electricity utilization, and certain negative influence can be formed on production safety, therefore, in order to improve the grinding efficiency and quality of the ball mill and achieve the energy-saving requirement, an intelligent control method needs to be sought, the problems of aligning when the existing ball mill is changed, slipping when the load is restarted due to raw material condensation after the shutdown time is long, and the control cost of the ball mill is high are solved.
Disclosure of Invention
In view of the above drawbacks of the prior art, an object of the present invention is to provide an intelligent control method and system for a ball mill without an auxiliary machine, which control a main machine of the ball mill to complete the alignment and the belt slippage functions originally completed by an auxiliary machine of the ball mill, and are used to solve the problems of alignment during material changing of the ball mill, slippage during restarting due to excessive load caused by raw material condensation after a long downtime, high control cost of the ball mill, complex operation, and low reliability in the prior art.
The invention provides an intelligent control method for a ball mill without an auxiliary machine, which comprises the following steps:
s1, monitoring the rotating speed, the position and the motor running speed of the grinding cylinder, transmitting the obtained rotating speed and the real-time position of the grinding cylinder to a frequency converter by a grinding cylinder encoder, and transmitting the obtained motor running speed to the frequency converter by a motor encoder;
s2, judging whether a belt on the grinding cylinder body slips or not, converting the received rotating speed of the grinding cylinder body and the motor running speed into a speed ratio by a frequency converter, counting by a belt slip counter when the speed ratio is smaller than a set value, otherwise, resetting the belt slip counter, marking a slip mark as invalid, and entering a material changing alignment program; when the belt slip counter counts, the frequency converter continuously monitors the belt slip time, when the slip time is greater than the set time, the belt slip is judged, the frequency converter controls the motor to run in the reverse direction, the set speed is changed into the set inching speed, the slip mark is marked as effective, the position where the grinding cylinder body passes is recorded to be reset, and then the step S1 is carried out;
s3, monitoring whether the grinding cylinder can normally run, receiving the real-time position of the grinding cylinder obtained by the grinding cylinder encoder through a frequency converter, setting the number of turns of the grinding cylinder rotating along the same direction as n (n is larger than or equal to 1), resetting a slip mark when the real-time position of the grinding cylinder is larger than the number of n-turn pulses, and entering a material changing alignment program;
and S4, sending a feed inlet or discharge outlet alignment instruction to the frequency converter by the operation table to control the position of the grinding cylinder, sending a feed inlet or discharge outlet alignment instruction to the frequency converter by the operation table, switching the position control mode by the frequency converter, and adjusting the grinding cylinder to rotate to the position corresponding to the feed inlet or discharge outlet.
Further, the rotational speed of the grinding cylinder that grinding cylinder encoder monitoring obtained is v1, the running speed that motor side encoder monitoring obtained the motor is v2, connect in the reduction ratio of the speed reducer between motor and the grinding cylinder is k, the grinding cylinder diameter is D1, speed reducer side belt pulley diameter is D2, and when the belt did not skid, the speed ratio of the rotational speed of grinding cylinder and motor running speed was:
i＝v1/v2＝D2/(D1*k)
let i 1-D2/(D1 k), i 2-v 1/v2
When i2< a x i1(0< a <1), which indicates belt slip, a is a preset set value of the frequency converter, a may be 0.5 or 0.6.
Further, the set time is preset by the frequency converter.
Further, the specific process of step S4 is as follows:
the frequency converter receives a feed inlet alignment instruction of the operating platform, the frequency converter is switched to a position control mode, the position P1 of the feed inlet is taken as a position instruction, the grinding cylinder body is rotated to the position of the feed inlet, and otherwise, the grinding cylinder body runs at a set normal speed; or the frequency converter receives a discharge port alignment instruction of the operating platform, the frequency converter is switched to a position control mode, the position P2 of the discharge port is used as a position instruction, the grinding cylinder body is rotated to the discharge port, and otherwise, the grinding cylinder body runs at a set normal speed.
An intelligent control system without an auxiliary machine for a ball mill mainly comprises the following modules:
the monitoring module is used for monitoring the rotating speed and position of the grinding cylinder and the running speed of the motor;
the logic processing module is used for carrying out logic operation on the rotating speed of the grinding cylinder, the motor running speed and the real-time position of the grinding cylinder which are measured by the monitoring module so as to judge whether a belt on the grinding cylinder slips or not;
the position judging module is used for comparing the real-time position information of the grinding cylinder, which is received by the frequency converter and obtained by the grinding cylinder encoder, with the preset number of turns running in the same direction, and judging whether the monitoring grinding cylinder can run normally or not;
and the material changing and aligning module is used for sending a material inlet or material outlet aligning instruction to the frequency converter by the operating platform to control the positions of the grinding cylinder and the material inlet or the material outlet.
Furthermore, the monitoring module is used for transmitting the rotating speed and the real-time position of the grinding cylinder obtained by the grinding cylinder encoder to the frequency converter, and the motor encoder transmits the obtained motor running speed to the frequency converter.
Further, the logic processing module converts the received rotating speed of the grinding cylinder and the motor running speed into a speed ratio by a frequency converter, when the speed ratio is smaller than a set value, the frequency converter monitors the belt slipping time, when the slipping time is larger than the set time, the belt slipping on the grinding cylinder is judged, and the frequency converter controls the motor running direction to be reverse.
Furthermore, the position determination module receives the real-time position of the grinding cylinder obtained by the grinding cylinder encoder through the frequency converter, sets the number of turns of the grinding cylinder rotating along the same direction to be n (n is larger than or equal to 1), determines that the grinding cylinder normally operates when the real-time position of the grinding cylinder is larger than the number of n-turn pulses, and enters a material changing alignment program.
Furthermore, the material changing alignment module receives a feed inlet alignment instruction of the operating platform through the frequency converter, the frequency converter is switched to a position control mode, and the grinding cylinder is controlled to rotate to the position of the feed inlet by taking the position P1 of the feed inlet as a position instruction; or the frequency converter receives a discharge port contraposition instruction of the operating platform, the frequency converter is switched to a position control mode, and the position P2 of the discharge port is used as a position instruction to control the grinding cylinder body to rotate to the discharge port position. In an embodiment of the invention, the problem of alignment when the ball mill is reloaded, the problem of slipping when the ball mill is restarted due to too heavy load caused by raw material condensation after long stopping time, and the problem of high control cost of the ball mill are solved.
As mentioned above, the intelligent control method and system for the ball mill without the auxiliary machine of the invention have the following beneficial effects:
the invention can complete the alignment originally completed by the auxiliary machine of the ball mill and the swinging function when the belt slips by controlling the main machine of the ball mill, the invention consists of eight parts, namely an operation table, a frequency converter, a motor encoder, a speed reducer, a belt, a grinding cylinder body and a grinding cylinder body encoder, wherein the frequency converter outputs and controls the motor, the motor is connected with the speed reducer, the rotation of the grinding cylinder body is controlled by the belt, the speed and the position of the frequency converter measured by the motor side encoder and the grinding cylinder body side encoder are combined, the grinding cylinder body is controlled to complete the automatic swinging rotation after logic operation and logic processing, the whole framework has no influence on the main body structure of the ball mill, the original auxiliary machine motor and the speed reducer are removed, two encoders are added, the cost of the encoders is only one dozen times of the cost of the auxiliary machine, the cost is greatly reduced, and the problems of automatic alignment and belt slipping can be solved by only matching one frequency converter, greatly reduces the cost of the ball mill, reduces the operation complexity and improves the reliability.
Drawings
FIG. 1 is a flow chart of the intelligent control method of the ball mill without an auxiliary machine according to the present invention;
FIG. 2 is a schematic flow chart of the intelligent control method of the ball mill without the auxiliary machine according to the present invention;
FIG. 3 is a schematic view showing the function of the grinding drum automatically swinging when the belt of the present invention slips;
FIG. 4 is a flow chart of the intelligent control system without auxiliary machine for ball mill in the invention.
FIG. 5 is a block diagram of the intelligent control system without auxiliary machine for ball mill in the present invention
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict.
It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention, and the components related to the present invention are only shown in the drawings rather than drawn according to the number, shape and size of the components in actual implementation, and the type, quantity and proportion of the components in actual implementation may be changed freely, and the layout of the components may be more complicated.
Referring to fig. 1, it should be understood that the structures, ratios, sizes, and the like shown in the drawings are only used for understanding and reading the disclosure of the present invention, and are not used to limit the conditions that the present invention can be implemented, so they have no technical significance, and any structural modifications, ratio changes, or size adjustments should fall within the scope of the present invention without affecting the efficacy and attainment of the same. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.
As shown in fig. 1-2, an intelligent control method for a ball mill without an auxiliary machine comprises the following steps:
s1, monitoring the rotating speed, the position and the motor running speed of the grinding cylinder, transmitting the obtained rotating speed and the real-time position of the grinding cylinder to a frequency converter by a grinding cylinder encoder, and transmitting the obtained motor running speed to the frequency converter by a motor encoder;
s2, judging whether a belt on the grinding cylinder body slips or not, converting the received rotating speed of the grinding cylinder body and the motor running speed into a speed ratio by a frequency converter, counting by a belt slip counter when the speed ratio is smaller than a set value, otherwise, resetting the belt slip counter, marking a slip mark as invalid, and entering a material changing alignment program; when the belt slip counter counts, the frequency converter continuously monitors the belt slip time, when the slip time is greater than the set time, the belt slip is judged, the frequency converter controls the motor to run in the reverse direction, the set speed is changed into the set inching speed, the slip mark is marked as effective, the position where the grinding cylinder body passes is recorded to be reset, and then the step S1 is carried out;
the frequency converter in the invention adopts an incremental encoder with the model number of EC58H15R-P6PR 0020, and the realized logic analysis is as follows: when the ball mill is in the restart state after the down time is longer, because the thick liquids condense, lead to the load to become heavy, the belt can skid, carries out special swing control when failing normal rotation, when needs feeding and ejection of compact, carries out feed inlet and discharge gate automatically and need counterpoint with the ball mill.
Specifically, as shown in fig. 3, the rotation speed of the grinding drum obtained by monitoring the grinding drum encoder is v1, the running speed of the motor obtained by monitoring the motor side encoder is v2, the reduction ratio of the speed reducer connected between the motor and the grinding drum is k, the diameter of the grinding drum is D1, the diameter of the belt pulley on the side of the speed reducer is D2, and when the belt does not slip, the speed ratio of the rotation speed of the grinding drum to the running speed of the motor is:
i＝v1/v2＝D2/(D1*k)
let i 1-D2/(D1 k), i 2-v 1/v2
Because the measurement has precision problems, and the rotating speed v1 of the grinding cylinder body is close to 0 when the grinding cylinder body completely slips, the slip can be judged in engineering application by i2< a < i1(0< a <1), a can be set in a frequency converter, usually 0.5 or 0.6, adjustment can be made according to actual conditions, the rotating speed ratio can be greatly changed when the grinding cylinder body accelerates and decelerates due to the elasticity of a belt, a judgment time, namely the set time t, is required to be added, the grinding cylinder body is considered to slip after i2< a < i1 is continuously t time, and t can be preset by the frequency converter. When the two conditions are met simultaneously, the belt is judged to slip, the frequency converter controls the running direction of the motor to be reverse, namely, the motor rotates reversely when the motor rotates forwards currently, and the motor rotates forwards when the motor rotates backwards currently. The given speed is the inching speed set in the frequency converter, when the grinding cylinder rotates to a certain angle and slips, the grinding cylinder rotates reversely again, and the grinding cylinder rotates reversely to the slipping position every time. Therefore, the grinding cylinder body can swing back and forth, rotate clockwise for a moment and rotate anticlockwise for a moment, slurry in the cylinder body can be scattered after the grinding cylinder body rotates for a plurality of times, and the load becomes light.
S3, monitoring whether the grinding cylinder can normally run, receiving the real-time position of the grinding cylinder obtained by the grinding cylinder encoder through a frequency converter, setting the number of turns of the grinding cylinder rotating along the same direction as n (n is larger than or equal to 1), resetting a slip mark when the real-time position of the grinding cylinder is larger than the number of n-turn pulses, and entering a material changing alignment program;
the grinding cylinder body can normally run because the grinding cylinder body cannot rotate for a whole circle in one direction when slipping is carried out until the grinding cylinder body can smoothly rotate for a circle in one direction, and for the sake of safety, the grinding cylinder body can rotate for a plurality of circles in the judgment, the number of the circles of the grinding cylinder body rotating along the same direction is set to be n (n is more than or equal to 1), the grinding cylinder body can be arranged in a frequency converter, and the grinding cylinder body can automatically cut into the normal speed to run after the slipping phenomenon is judged to disappear.
And S4, sending a feed inlet or discharge outlet alignment instruction to the frequency converter by the operation table to control the position of the grinding cylinder, sending a feed inlet or discharge outlet alignment instruction to the frequency converter by the operation table, switching the position control mode by the frequency converter, and adjusting the grinding cylinder to rotate to the position corresponding to the feed inlet or discharge outlet.
The specific process of step S4 is as follows: the frequency converter receives a feed inlet alignment instruction of the operating platform, the frequency converter is switched to a position control mode, the position P1 of the feed inlet is taken as a position instruction, the grinding cylinder body is rotated to the position of the feed inlet, and otherwise, the grinding cylinder body runs at a set normal speed; or the frequency converter receives a discharge port alignment instruction of the operating platform, the frequency converter is switched to a position control mode, the position P2 of the discharge port is used as a position instruction, the grinding cylinder body is rotated to the discharge port, and otherwise, the grinding cylinder body runs at a set normal speed.
As shown in fig. 4-5, an intelligent control system without auxiliary machine for ball mill mainly comprises the following modules:
the monitoring module is used for monitoring the rotating speed and position of the grinding cylinder and the running speed of the motor;
the logic processing module is used for carrying out logic operation on the rotating speed of the grinding cylinder, the motor running speed and the real-time position of the grinding cylinder which are measured by the monitoring module so as to judge whether a belt on the grinding cylinder slips or not;
the position judging module is used for comparing the real-time position information of the grinding cylinder, which is received by the frequency converter and obtained by the grinding cylinder encoder, with the preset number of turns running in the same direction, and judging whether the monitoring grinding cylinder can run normally or not;
and the material changing and aligning module is used for sending a material inlet or material outlet aligning instruction to the frequency converter by the operating platform to control the positions of the grinding cylinder and the material inlet or the material outlet.
Furthermore, the monitoring module is used for transmitting the rotating speed and the real-time position of the grinding cylinder obtained by the grinding cylinder encoder to the frequency converter, and the motor encoder transmits the obtained motor running speed to the frequency converter.
Further, the logic processing module converts the received rotating speed of the grinding cylinder and the motor running speed into a speed ratio by a frequency converter, when the speed ratio is smaller than a set value, the frequency converter monitors the belt slipping time, when the slipping time is larger than the set time, the belt slipping on the grinding cylinder is judged, and the frequency converter controls the motor running direction to be reverse.
Furthermore, the position determination module receives the real-time position of the grinding cylinder obtained by the grinding cylinder encoder through the frequency converter, sets the number of turns of the grinding cylinder rotating along the same direction to be n (n is larger than or equal to 1), determines that the grinding cylinder normally operates when the real-time position of the grinding cylinder is larger than the number of n-turn pulses, and enters a material changing alignment program.
Furthermore, the material changing alignment module receives a feed inlet alignment instruction of the operating platform through the frequency converter, the frequency converter is switched to a position control mode, and the grinding cylinder is controlled to rotate to the position of the feed inlet by taking the position P1 of the feed inlet as a position instruction; or the frequency converter receives a discharge port contraposition instruction of the operating platform, the frequency converter is switched to a position control mode, and the position P2 of the discharge port is used as a position instruction to control the grinding cylinder body to rotate to the discharge port position.
In the invention, the frequency converter outputs three-phase voltage through a lead to control the forward transmission, the reverse rotation or the stop of the motor; the motor passes through the speed reducer and the belt links to each other with ball mill grinding barrel, and control grinding barrel rotates when the motor rotates, and when the motor stopped, grinding barrel stopped, and motor encoder and grinding barrel encoder convey the speed and the position signal who detects the converter simultaneously.
The invention mainly aims to solve the problems of high control cost, complex operation and low reliability of the traditional ball mill, and the alignment and the swinging function when a belt slips originally completed by an auxiliary machine of the ball mill are completed by controlling a main machine of the ball mill. The grinding machine consists of eight parts, namely an operating table, a frequency converter, a motor encoder, a speed reducer, a belt, a grinding cylinder and a grinding cylinder encoder, wherein the frequency converter outputs to control the motor, the motor is connected with the speed reducer, and the belt controls the rotation of the grinding cylinder.
In summary, the present invention provides an intelligent control method and system for a ball mill by a frequency converter, the method and system mainly control a grinding cylinder to complete automatic swing rotation after logic operation and logic processing of speed and position measured by the frequency converter through encoders on a motor side and a grinding cylinder side, the main structure of the ball mill is not affected by the whole architecture, an auxiliary motor and a speed reducer are removed, two encoders are added, the cost of the encoders is only one tenth of the cost of the auxiliary, the cost is greatly reduced, and the purposes of reducing the cost of the ball mill, reducing the operation complexity and improving the reliability can be achieved by only matching one frequency converter.
Therefore, the invention effectively overcomes various defects in the prior art and has high industrial utilization value.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (9)
1. An intelligent control method for a ball mill without an auxiliary machine is characterized by comprising the following steps:
s1, monitoring the rotating speed, the position and the motor running speed of the grinding cylinder, transmitting the obtained rotating speed and the real-time position of the grinding cylinder to a frequency converter by a grinding cylinder encoder, and transmitting the obtained motor running speed to the frequency converter by a motor encoder;
s2, judging whether a belt on the grinding cylinder body slips or not, converting the received rotating speed of the grinding cylinder body and the motor running speed into a speed ratio by a frequency converter, counting by a belt slip counter when the speed ratio is smaller than a set value, otherwise, resetting the belt slip counter, marking a slip mark as invalid, and entering a material changing alignment program; when the belt slip counter counts, the frequency converter continuously monitors the belt slip time, when the slip time is greater than the set time, the belt slip is judged, the frequency converter controls the motor to run in the reverse direction, the set speed is changed into the set inching speed, the slip mark is marked as effective, the position where the grinding cylinder body passes is recorded to be reset, and then the step S1 is carried out;
s3, monitoring whether the grinding cylinder can normally run, receiving the real-time position of the grinding cylinder obtained by the grinding cylinder encoder through a frequency converter, setting the number of turns of the grinding cylinder rotating along the same direction as n, wherein n is not less than 1, resetting a slip mark when the real-time position of the grinding cylinder is greater than the number of n-turn pulses, and entering a material changing alignment program;
and S4, sending a feed inlet or discharge outlet alignment instruction to the frequency converter by the operation table to control the position of the grinding cylinder, sending a feed inlet or discharge outlet alignment instruction to the frequency converter by the operation table, switching the position control mode by the frequency converter, and adjusting the grinding cylinder to rotate to the position corresponding to the feed inlet or discharge outlet.
2. The intelligent control method for the auxiliary-free ball mill according to claim 1, wherein the rotation speed of the grinding cylinder obtained by monitoring the grinding cylinder encoder is v1, the running speed of the motor obtained by monitoring the motor encoder is v2, the reduction ratio of the speed reducer connected between the motor and the grinding cylinder is k, the diameter of the grinding cylinder is D1, the diameter of the side pulley of the speed reducer is D2, and when the belt does not slip, the speed ratio of the rotation speed of the grinding cylinder to the running speed of the motor is:
i＝v1/v2＝D2/(D1*k)
let i 1-D2/(D1 k), i 2-v 1/v2
When i2< a x i1 and 0< a <1, it indicates belt slip, a is a preset set value of the frequency converter, and a is adjusted between 0 and 1 according to equipment differences.
3. A method for intelligently controlling a ball mill without an auxiliary according to claim 1, wherein the setting time is previously set by a frequency converter.
4. The intelligent control method for the unassisted ball mill as recited in claim 1, wherein the step S4 comprises the following steps:
the frequency converter receives a feed inlet alignment instruction of the operating platform, the frequency converter is switched to a position control mode, the first position of the feed inlet is used as a position instruction, the grinding cylinder body is rotated to the position of the feed inlet, and otherwise, the grinding cylinder body runs at a set normal speed; or the frequency converter receives a discharge port alignment instruction of the operating platform, the frequency converter is switched to a position control mode, a second position of the discharge port is used as a position instruction, the grinding cylinder body is rotated to the discharge port, and otherwise, the grinding cylinder body runs at a set normal speed.
5. An assistive-free intelligent control system for a ball mill, comprising:
the monitoring module is used for monitoring the rotating speed and position of the grinding cylinder and the running speed of the motor;
the logic processing module is used for carrying out logic operation on the rotating speed of the grinding cylinder, the motor running speed and the real-time position of the grinding cylinder which are measured by the monitoring module so as to judge whether a belt on the grinding cylinder slips or not;
the position judging module is used for comparing the real-time position information of the grinding cylinder, which is received by the frequency converter and obtained by the grinding cylinder encoder, with the preset number of turns running in the same direction, and judging whether the monitoring grinding cylinder can run normally or not;
and the material changing and aligning module is used for sending a material inlet or material outlet aligning instruction to the frequency converter by the operating platform to control the positions of the grinding cylinder and the material inlet or the material outlet.
6. A ball mill intelligent control system without an auxiliary machine, as claimed in claim 5, characterized in that, the monitoring module is used for transmitting the rotation speed and real-time position of the grinding cylinder obtained by the grinding cylinder encoder to the frequency converter, and the motor encoder transmits the obtained motor running speed to the frequency converter.
7. The intelligent control system for the auxiliary-free ball mill according to claim 5, wherein the logic processing module converts the received rotation speed of the grinding cylinder and the motor running speed into a speed ratio by a frequency converter, when the speed ratio is smaller than a set value, the frequency converter monitors the belt slip time, when the slip time is larger than the set time, the belt slip on the grinding cylinder is judged, and the frequency converter controls the motor running direction to be reversed.
8. The intelligent control system for the unassisted ball mill according to claim 5, wherein the position determining module is configured to receive a real-time position of the grinding cylinder obtained by the grinding cylinder encoder through a frequency converter, the number of rotations of the grinding cylinder in the same direction is set to be n, n is not less than 1, and when the real-time position of the grinding cylinder is greater than the number of pulses of n, the grinding cylinder is determined to be in normal operation, and a material changing alignment procedure is performed.
9. The intelligent control system for the no-auxiliary machine of the ball mill as claimed in claim 5, wherein the material-changing contraposition module receives a contraposition instruction of a feeding hole of the operation table by a frequency converter, the frequency converter is switched to a position control mode, and a first position of the feeding hole is used as a position instruction to control the grinding cylinder body to rotate to the position of the feeding hole; or the frequency converter receives a discharge port contraposition instruction of the operating platform, the frequency converter is switched to a position control mode, and a second position of the discharge port is used as a position instruction to control the grinding cylinder body to rotate to the discharge port.
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| CN109264333A (en) * | 2018-08-23 | 2019-01-25 | 中国神华能源股份有限公司 | Sealing-tape machine owes fast guard method, device, storage medium and sealing-tape machine |
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| CN207780584U (en) * | 2018-02-06 | 2018-08-28 | 苏州中材建设有限公司 | Ball grinder saving energy control system |
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| CN111774173A (en) | 2020-10-16 |
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