CN102556685A - Bucket-wheel rotation speed detecting system for bucket-wheel stacker-reclaimer - Google Patents
Bucket-wheel rotation speed detecting system for bucket-wheel stacker-reclaimer Download PDFInfo
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- CN102556685A CN102556685A CN2012100258457A CN201210025845A CN102556685A CN 102556685 A CN102556685 A CN 102556685A CN 2012100258457 A CN2012100258457 A CN 2012100258457A CN 201210025845 A CN201210025845 A CN 201210025845A CN 102556685 A CN102556685 A CN 102556685A
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Abstract
The invention discloses a bucket-wheel rotation speed detecting system for a bucket-wheel stacker-reclaimer. Sensing blocks rotating along with a bucket-wheel are installed on a bucket-wheel disc, a sensor for sensing the sensing blocks is installed at a position, close to the bucket-wheel disc, of a chute support for supporting a chute, the sensor is used for generating pulse signals when detecting the sensing blocks to be close to the sensor and outputting the signals to a controller, and the controller is used for computing the bucket-wheel rotation speed according to the received pulse signals. The bucket-wheel rotation speed detecting system is specially designed according to working conditions and requirements of the bucket-wheel stacker-reclaimer, and is quick in reaction speed while the bucket-wheel rotation speed is accurately detected, a bucket-wheel mechanism is guaranteed to be safe in operation, safety of the bucket-wheel stacker-reclaimer is enhanced, controllability of the system is improved, and the bucket-wheel rotation speed detecting system has the remarkable advantages of low investment, convenience in installation and adjustment and the like.
Description
Technical field
The invention belongs to the harbor equipment technical field, relate to a kind of bucket-wheel stacker reclaimer, specifically, relate to a kind of monitoring and safety system that is used for detecting bucket-wheel stacker reclaimer bucket wheel mechanism rotating speed.
Background technology
Bucket-wheel stacker reclaimer is main force's equipment in domestic and international ore loading and unloading specialized wharf stockyard, has characteristics such as high operating efficiency, low running cost, and is beneficial to the automation that realizes the loading and unloading of ore stockyard.In recent years, along with the continuous maturation of maximization, high efficiency and the bucket-wheel stacker reclaimer manufacturing technology in ore terminal, bucket-wheel stacker reclaimer also progressively to maximizing and the high efficiency direction develops, was also had higher requirement to the performance of equipment material extracting operation simultaneously.For the bucket wheel mechanism that makes stacker-reclaimer has higher safety and reliability; Must take necessary detection means that the operation process of bucket wheel mechanism is detected; So that when the operation generation of bucket wheel mechanism is unusual, can in time take the corresponding protection measure, guarantee the whole set equipment safe operation.
Bucket wheel mechanism in the bucket-wheel stacker reclaimer is the topmost material fetching mechanism of stacker-reclaimer, and the material extracting operation of stacker-reclaimer at first will be accomplished by bucket wheel mechanism.Therefore, the maximization of stacker-reclaimer and high efficiency at first require the maximization and the high efficiency of bucket wheel mechanism, thereby cause the diameter of bucket wheel wheel disc increasing; Load-carrying capacity is more and more stronger; Velocity of rotation is more and more faster, and corresponding, the rotor inertia of bucket wheel mechanism is also just increasing.Though bucket wheel mechanism has considered calculation of strength in machine design itself; But the probability that stall or stall appear in bucket wheel increases greatly, and in case stall or stall take place; Its destructiveness also will improve greatly, and this will bring the harm that can't estimate to whole bucket-wheel stacker reclaimer.In addition, situation such as the working condition of bucket wheel mechanism and accentric installation form also makes the rotating speed of bucket wheel detect and implements the comparison difficulty.
Summary of the invention
The object of the present invention is to provide a kind of bucket wheel rotary speed detecting system of bucket-wheel stacker reclaimer, accurately detect, get the safety of material operation to improve complete machine through operating speed to bucket wheel mechanism.
For solving the problems of the technologies described above, the present invention adopts following technical scheme to be achieved:
A kind of bucket wheel rotary speed detecting system of bucket-wheel stacker reclaimer; The sensor block that together rotates with bucket wheel is installed on the bucket wheel wheel disc; Position being used to support contiguous bucket wheel wheel disc on the chute support of chute is equipped with the sensor that is used to respond to said sensor block position; Said sensor detect sensor block and its near the time production burst signal output to controller, said controller calculates the bucket wheel rotating speed according to the impulse singla that receives.
Further, said sensor block is installed on the spoke of bucket wheel wheel disc, and when said spoke was installed the position of said sensor on through the chute support, said sensor block was just relative with described sensor station.
In order to improve range rate accuracy, preferably on each root spoke of said bucket wheel wheel disc, a sensor block is installed all.
Preferably, said sensor preferably adopts contactless inductance sensor.
Further again; Said controller is judged the operation conditions of bucket wheel and sensor according to the impulse singla that receives; And then generate control signal and export the actuating unit that is used to drive the bucket wheel operation to, control executing mechanism operation or shut down is to guarantee the safety of complete machine operation.
Further again; In said actuating unit, include and be used to drive bucket wheel wheel disc motor rotating, said controller is considered the inertia problem of bucket wheel wheel disc behind said electric motor starting; The timing of at first delaying time; After time-delay arrive to start setting-up time, begin the impulse singla of pick-up transducers output again, guarantee the accuracy that detects with this.
Further; In the supply line that connects said motor, be in series with the armature contact of AC contactor; Said controller outputs control signals to AC contactor after receiving power-on command, the armature contact action of control AC contactor; The operation that powers on of the current supply circuit that is communicated with motor, control motor; Said controller passes through the secondary contact that one of which road IO mouth connects AC contactor, and perhaps connects direct supply through said secondary contact ground connection, and said controller is judged to be electric motor starting, trigger timing when detecting the secondary contact action.
For the whether detection of et out of order problem of sensor; Preferred design of the present invention is: said controller is behind the impulse singla of beginning pick-up transducers output, and starting second time meter is the loop cycle timing with setting-up time T2, if in a time-count cycle; Controller does not receive the impulse singla of sensor output all the time; Then the determine sensor fault outputs control signals to actuating unit, and control executing mechanism is shut down and output alarm signal.
Whether owe the detection of the speed or the problem that exceeds the speed limit for the bucket wheel rotating speed; Preferred design of the present invention is: said controller is behind the impulse singla of beginning pick-up transducers output; Starting first time meter is the loop cycle timing with setting-up time T1; And the impulse singla that collects in each cycle counted, and then calculate the current rotating speed of bucket wheel; If the current rotating speed of bucket wheel falls in the normal range of speed, then control executing mechanism continues operation; Otherwise control executing mechanism is shut down and output alarm signal.
Preferably, said setting-up time T1 is preferably set to bucket wheel and rotates a circle the required time with rated speed of rotation, and setting can realize the bucket wheel rotary speed detecting system on the rapid-action basis like this, guarantees certain accuracy.
Compared with prior art; Advantage of the present invention and good effect are: bucket wheel rotary speed detecting system of the present invention is directed against the operating mode of bucket-wheel stacker reclaimer and requires customized design, when accurately detecting the bucket wheel rotating speed, has speed of response faster; Solved the security problem of bucket wheel mechanism safe in operation; Strengthened bucket-wheel stacker reclaimer safety of products performance, that has improved system simultaneously can be handling, has significant advantages such as investment is little, Installation and Debugging are convenient.
After the detailed description in conjunction with the advantages embodiment of the present invention, other characteristics of the present invention and advantage will become clearer.
Description of drawings
Fig. 1 is the structural representation of a kind of embodiment of bucket wheel mechanism in the bucket-wheel stacker reclaimer proposed by the invention;
Fig. 2 is the installation site scheme drawing of a kind of embodiment of sensor and sensor block among Fig. 1;
Fig. 3 is the program control flow chart of a kind of embodiment of bucket wheel rotary speed detecting system proposed by the invention;
Fig. 4 is controller carries out a kind of embodiment of start and stop control to bucket wheel mechanism a schematic block circuit diagram.
The specific embodiment
Describe in detail below in conjunction with the accompanying drawing specific embodiments of the invention.
Embodiment one, and present embodiment is provided with sensor block and sensor in order to improve the safety of bucket-wheel stacker reclaimer operation in the bucket wheel mechanism of stacker-reclaimer; And the controller in the cooperation electric-control system; Completion is to the accurate detection of bucket wheel rotating speed, so that when operating troubles occurring in bucket wheel mechanism, can take safety method in time; Avoid the generation of Peril Incident, guarantee equipment and personnel's safety.
In bucket wheel mechanism, the scraper bowl 1 that is used to load and unload material is installed in bucket wheel wheel disc 2, and bucket wheel wheel disc 2 is provided with spoke 4; Through the central rotating shaft 3 of spoke 4 connection bucket wheel wheel discs 2,, can drive whole bucket wheel wheel disc 2 and rotate through driving central rotating shaft 3 rotations; And then utilize scraper bowl 1 shovel to get materials such as ore, and and unload when putting the position turning to, the material in the scraper bowl 1 is unloaded be put in the chute 8; Utilize the steering-effecting of chute 8 that material transfer heap is discharged on the load-transfer device of band conveyor then; And then go out through conveyor delivery, in conjunction with Fig. 1, shown in Figure 2 shown in, said chute 8 is supported by chute support 7.In present bucket-wheel stacker reclaimer, in order to improve operating efficiency, need to install a plurality of scraper bowls 1 on the bucket wheel wheel disc 2 usually, at the installed position of each scraper bowl 1 spoke 4 is set, connect central rotating shaft 3, to improve mechanical strength.Bucket wheel mechanism for example shown in Figure 1 just is equipped with nine scraper bowls 1 and nine spokes 4 (nine spokes 4 all do not draw) in Fig. 1; Certainly; The number of said spoke 4 also can be different from the number of scraper bowl 1, as long as can guarantee mechanical strength, present embodiment does not specifically limit this.Whole bucket wheel wheel disc 2 is supported by spoke 4; The central rotating shaft 3 of bucket wheel wheel disc 2 connects the actuating unit that is used to drive the bucket wheel operation; Specifically be connected on the output shaft of motor in the actuating unit, through whole bucket wheel wheel disc 2 rotations of motor-driven, to accomplish the loading and unloading operation of material.
In order to realize the effective detection to the bucket wheel rotating speed, present embodiment preferably is installed in sensor block 5 on the bucket wheel wheel disc 2, together rotates with bucket wheel wheel disc 2; Sensor 6 is installed in a side contiguous as far as possible with bucket wheel wheel disc 2 on the chute support 7; And should guarantee sensor block 5 in the concrete installation site on the chute support 7 with bucket wheel wheel disc 2 together in the rotating process, when turning to, can get into the induction region that sensor 6 is produced near said chute support 7.With bucket wheel wheel disc 2 together in the rotating process, the induction region that produces through sensors 6 whenever sensor block 5 will be through impulse singla of sensor 6 induction outputs, and is delivered to the controller in the electric-control system at sensor block 5.In controller, adopt the mode of software programming, gather, handle and calculate through the impulse singla that sensor 6 is exported, and then calculate the actual speed of bucket wheel.Through bucket wheel rotating speed that calculates and setting rotating speed are compared; Whether hypervelocity takes place or owe fast fault to judge bucket wheel; And then when bucket wheel operation appearance was unusual, control executing mechanism was made the corresponding protection action in time, to guarantee the safety of stacker-reclaimer work.
In stacker-reclaimer; The key factor that the bucket wheel rotating speed detects is stability and the reliability that sensor 6 detects; And the accuracy rate of rotating speed algorithm and the promptness of making hazardous reaction; Through after conscientious research and the type selection calculation, present embodiment preferably adopts the contactless inductance sensor of suitable mal-condition as measuring cell, and the sensor block 5 that is installed on the bucket wheel wheel disc 2 is responded to detection.
As a kind of preferred design of present embodiment, said sensor block 5 preferably is arranged on the spoke 4 of bucket wheel wheel disc 2, and is as shown in Figure 1; Its answer in the concrete installation site on the spoke 4 view sensor 6 on chute support 7 concrete installation site and decide; The spoke 4 that promptly should guarantee sensor block 5 is installed is when installing the position of said sensor 6 through chute support 7, and sensor block 5 can get into the induction region that sensor 6 is produced, and preferably can just make sensor block 5 relative with the position of sensor 6; To respond to the production burst signal exactly; Export controller to, be used for the calculating of bucket wheel rotating speed, referring to shown in Figure 2.
If a sensor block 5 only is set on bucket wheel wheel disc 2, then bucket wheel wheel disc 2 rotates a circle, and can only respond to impulse singla of output through sensor 6, the bucket wheel rotating speed that calculates thus, and its precision obviously is very low.In order to improve the accuracy rate of bucket wheel revolution speed calculating; Present embodiment preferably all is provided with a sensor block 5 on each root spoke 4 of bucket wheel wheel disc 2, as shown in Figure 1, bucket wheel wheel disc 2 rotates a circle; Can be through a plurality of impulse singlas of sensor 6 induction outputs; Export controller to, through in preset setting-up time T1, a plurality of impulse singlas that receive being counted, to realize accurate calculating to the bucket wheel rotating speed.
In the present embodiment, said controller preferably adopts the programmable logic controller (PLC) PLC of electric-control system in the stacker-reclaimer to carry out the design of circuit system.Utilize the control panel of PLC connection stacker-reclaimer, receive the instruction of controlling of operating personal execution, for example power-on command, halt command etc. start the stoppage in transit that moves or shut down to control bucket wheel mechanism.
Below in conjunction with accompanying drawing 3, the software control flow process that the PLC controller is performed is carried out detailed elaboration.
S301, system boot initialization;
After the Alternating Current Power Supply of bucket-wheel stacker reclaimer closes a floodgate, the operation that at first powers on of the electric-control system in the stacker-reclaimer, the PLC controller gets into the system initialization process, and its each road IO mouth is carried out initial configuration, and to each variable tax initial value of required use in the program.
S302, start the bucket wheel operation that powers on;
After electric-control system and the end of PLC software program initializes; PLC can direct control bucket wheel mechanism start operation; Also can receive operating personal through after pressing the button inputted power-on command of start on the control panel; Control the operation that powers on of bucket wheel mechanism again, specifically decide by the actual design situation of stacker-reclaimer.
Present embodiment with the power-on command that receives operating personal after, control bucket wheel mechanism again and start and to operate to example and describe.For the start-up control of bucket wheel mechanism, the mode that present embodiment can be employed in the armature contact of series connection AC contactor J in the supply line of the motor G that drives the running of bucket wheel wheel disc designs, and referring to shown in Figure 4, is that example describes often to open armature contact.One group of AC contactor J is often left armature contact to be connected in the supply line of motor G; If motor G is a three phase alternating current motor; Then can adopt three of AC contactor J often to drive the corresponding respectively three-phase alternating-current supply that is connected on of armature contact J1-J3 connects among three the phase power lead U, V, W of motor G power supply terminal; Through coil electricity or the outage of PLC control AC contactor J, and then control its armature contact J1-J3 action, realize break-make electric control motor G.
As a kind of concrete circuit layout scheme, can an end of AC contactor J coil be connected the road IO mouth of PLC, IO1 interface for example, the other end connects direct supply VCC through current-limiting resistance R1, and is as shown in Figure 4.After PLC receives power-on command, its IO1 interface is changed to low level, be communicated with the current supply circuit of AC contactor J coil; Make it often open armature contact J1-J3 adhesive; The operation of control motor G electrifying startup, and then drive bucket wheel wheel disc spins, begin to carry out the loading and unloading operation of material.
Certainly, also can at first control the TR action through PLC, utilize TR that the coil of described AC contactor J is carried out the break-make electric control then, to realize the break-make control to AC contactor J armature contact, present embodiment is not limited in above giving an example.
S303, judge whether bucket wheel mechanism starts operation, if then carry out subsequent step; Otherwise, repeat the detection deterministic process of this step;
In the present embodiment; Whether the control signal of the IO1 interface output through PLC really controls the armature contact J1-J3 action of AC contactor J; Make the motor G operation that powers on, present embodiment detects judgement by the secondary contact J4 of AC contactor J, and is as shown in Figure 4.Other one road IO mouth that the end of the secondary contact J4 of AC contactor J is connected PLC; IO2 interface for example; The other end ground connection of secondary contact J4 perhaps connects direct supply VCC through current-limiting resistance R2, and PLC changes through the level of its IO2 interface; Can judge secondary contact J4 and whether move, and then judge the whether really startup operation of bucket wheel mechanism indirectly.Often to open secondary contact J4 is that example describes; The IO2 interface that an end of often opening secondary contact J4 is connected PLC; The other end connects direct supply VCC through current-limiting resistance R2, and after energising under the control action of coil at PLC of AC contactor J, it often opens armature contact J1-J3 adhesive; The motor G operation that powers on drives bucket wheel mechanism and starts; Meanwhile, the secondary contact J4 adhesive of AC contactor J is changed to high level with the IO2 interface of PLC.PLC thinks that bucket wheel mechanism starts operation after detecting its IO2 interface and being transformed into high level.
S304, startup delay timer, the timing of delaying time;
In the present embodiment, consider that bucket wheel mechanism is bulky, weight is big, it rotates and needs the certain delay time through motor G driving; Therefore, from the consideration of bucket wheel wheel disc inertia problem, for fear of the protection system misoperation; After detecting the startup of bucket wheel mechanism; At first start delay timer and carry out timing, after timing arrives startup setting-up time T, begin to carry out the detection computations of bucket wheel rotating speed again.
Said startup setting-up time T need make an experiment definite according to the actual rotation inertia of bucket wheel wheel disc, for example can be set at 20 seconds etc., and the detection computations ability that only remains to be carried out again after the real rotation of bucket wheel wheel disc is got up the bucket wheel rotating speed is meaningful.
S305, after the time-delay timing arrive to start setting-up time T, the impulse singla of beginning pick-up transducers;
In the present embodiment, said sensor just gets into running state in power on operation back of electric-control system, and at this moment, PLC can be through blocking the impulse singla that its interface that connects sensor wouldn't pick-up transducers be exported.Behind startup of bucket wheel mechanism and time-delay arrival startup setting-up time T, PLC opens its interface, and the beginning receiving sensor is responded to the impulse singla of output, to be used for the detection computations of bucket wheel rotating speed.
S306, startup first time meter and second time meter pick up counting; Wherein, First time meter is the loop cycle timing with setting-up time T1, and the impulse singla that collects in each cycle is counted, and then calculates the current rotating speed of bucket wheel; Through comparing, whether unusual to judge the bucket wheel rotating speed with setting rotating speed; Second time meter is the loop cycle timing with setting-up time T2, if in a time-count cycle, PLC does not receive the impulse singla of sensor output all the time, and then determine sensor breaks down.
Process fault detection in the face of bucket wheel rotating speed and sensor specifies down.
At first, introduce the process fault detection of sensor, may further comprise the steps:
A, PLC start second time meter and pick up counting, and the number of pulse signals that receives is counted behind the impulse singla of beginning pick-up transducers output;
B, judge whether the timing time of second time meter arrives setting-up time T2,, then continue the impulse singla that receives is counted, and repeat this step b if do not arrive setting-up time T2; If arrive setting-up time T2, then carry out subsequent step;
Whether the number of pulse signals of c, judgement record is zero, if greater than zero, think that then working sensor is normal, to the second time meter zero clearing, and returns step b and restarts the timing judgement; If pulse number is zero, promptly do not detect the impulse singla of sensor feedback, then think sensor fault; In order to ensure the safe operation of bucket wheel mechanism, preferably output control signals to actuating unit, control executing mechanism is shut down; The armature contact J1-J3 that often opens that for example controls AC contactor J breaks off; Control motor G shuts down, and then the stall of control bucket wheel, avoids having an accident.
After PLC detects sensor fault, in order in time to remind the staff sensor is carried out Breakdown Maintenance, preferably output control signals to alarm mechanism, control alarm mechanism output alarm signal reminds the staff to note.
Secondly, introduce the testing process of bucket wheel rotating speed, may further comprise the steps:
A, PLC start first time meter and pick up counting, and the number of pulse signals that receives is counted behind the impulse singla of beginning pick-up transducers output;
B, judge whether the timing time of first time meter arrives setting-up time T1,, then continue the impulse singla that receives is counted, and repeat this step B if do not arrive setting-up time T1; If arrive setting-up time T1, then carry out subsequent step;
In this step, said setting-up time T1 preferably turns over when bucket wheel rotates with rated speed of rotation between adjacent two spokes between the time t2 that the required rotation time t1 of distance and bucket wheel rotate a circle required with rated speed of rotation and carries out value.If setting-up time T1 chooses lessly, then the speed of response of checking system is very fast, but the accuracy of revolution speed calculating is relatively poor; If setting-up time T1 chooses greatlyyer; The t2 of twice or three times for example, though then can improve the accuracy of revolution speed calculating, speed of response is slower; PLC takes safety method in time when being unfavorable for that system breaks down, and hides some dangers for for the safe operation of complete machine.Therefore, present embodiment is preferably chosen bucket wheel and is rotated a circle time t2 required as setting-up time T1 with rated speed of rotation, so that on the basis of satisfying the rapid reaction requirement, guarantees certain revolution speed calculating accuracy.
C, according to the pulse number that in setting-up time T1, writes down, calculate the current rotating speed of bucket wheel;
D, judge whether bucket wheel hypervelocity takes place or owe fast fault, if, then outputing control signals to actuating unit, control bucket wheel mechanism shuts down and also sends alerting signal; Otherwise, first time meter is carried out zero clearing, and returns step B and restart timing calculating;
In this step, the higher limit and the lower limit of the normal speed scope of current rotating speed of the bucket wheel that calculates and setting compared, if the current rotating speed of bucket wheel is lower than lower limit, think that then bucket wheel owes fast fault; If the current rotating speed of bucket wheel is higher than higher limit, think that then the hypervelocity fault takes place bucket wheel.No matter bucket wheel is owed still hypervelocity of speed; Obviously all be unsafe for the operation of bucket wheel mechanism; In order to avoid the generation of Peril Incident as much as possible, present embodiment all passes through PLC output control signal when detecting bucket wheel generation hypervelocity or owing fast fault; Control executing mechanism is shut down, and gets into guard mode.For example: PLC can be changed to high level with its IO1 interface when the bucket wheel rotating speed breaks down, make the coil blackout of AC contactor J, often opens armature contact J1-J3 and breaks off, and cuts off the supply line of motor G, and motor G is shut down, and then control bucket wheel wheel disc stall protection.Meanwhile, PLC can also output control signals to warning device through its IO3 interface, and referring to shown in Figure 4, the alarm of control warning device is in time safeguarded system to remind the staff.
Bucket wheel rotary speed detecting system of the present invention is simple in structure, small investment, and the rotating speed accuracy in detection is high, and speed of response is fast, has significantly strengthened the safety and the reliability of bucket wheel mechanism and whole bucket-wheel stacker reclaimer operation.
Certainly, the above only is a kind of preferred implementation of the present invention, should be understood that; For those skilled in the art; Under the prerequisite that does not break away from the principle of the invention, can also make some improvement and retouching, these improvement and retouching also should be regarded as protection scope of the present invention.
Claims (10)
1. the bucket wheel rotary speed detecting system of a bucket-wheel stacker reclaimer; It is characterized in that: the sensor block that together rotates with bucket wheel is installed on the bucket wheel wheel disc; Position being used to support contiguous bucket wheel wheel disc on the chute support of chute is equipped with the sensor that is used to respond to said sensor block position; Said sensor detect sensor block and its near the time production burst signal output to controller, said controller calculates the bucket wheel rotating speed according to the impulse singla that receives.
2. bucket wheel rotary speed detecting system according to claim 1; It is characterized in that: said sensor block is installed on the spoke of bucket wheel wheel disc; When said spoke was installed the position of said sensor on through the chute support, said sensor block was just relative with described sensor station.
3. bucket wheel rotary speed detecting system according to claim 2 is characterized in that: on each root spoke of said bucket wheel wheel disc, a sensor block is installed all.
4. bucket wheel rotary speed detecting system according to claim 1 is characterized in that: said sensor is contactless inductance sensor.
5. according to each described bucket wheel rotary speed detecting system in the claim 1 to 4; It is characterized in that: said controller is judged the operation conditions of bucket wheel and sensor according to the impulse singla that receives; And then the generation control signal exports the actuating unit that is used to drive the bucket wheel operation to, control executing mechanism operation or shutdown.
6. bucket wheel rotary speed detecting system according to claim 5; It is characterized in that: in said actuating unit, include and be used to drive bucket wheel wheel disc motor rotating; Said controller is behind said electric motor starting; The timing of at first delaying time, time-delay arrive start setting-up time after, the impulse singla that begins pick-up transducers output again.
7. bucket wheel rotary speed detecting system according to claim 6; It is characterized in that: the armature contact that in the supply line that connects said motor, is in series with AC contactor; Said controller outputs control signals to AC contactor after receiving power-on command, the armature contact action of control AC contactor; The operation that powers on of the current supply circuit that is communicated with motor, control motor; Said controller passes through the secondary contact that one of which road IO mouth connects AC contactor, and perhaps connects direct supply through said secondary contact ground connection, and said controller is judged to be electric motor starting, trigger timing when detecting the secondary contact action.
8. bucket wheel rotary speed detecting system according to claim 6; It is characterized in that: said controller is behind the impulse singla of beginning pick-up transducers output, and starting second time meter is the loop cycle timing with setting-up time T2, if in a time-count cycle; Controller does not receive the impulse singla of sensor output all the time; Then the determine sensor fault outputs control signals to actuating unit, and control executing mechanism is shut down and output alarm signal.
9. bucket wheel rotary speed detecting system according to claim 6; It is characterized in that: said controller is behind the impulse singla of beginning pick-up transducers output; Starting first time meter is the loop cycle timing with setting-up time T1; And the impulse singla that collects in each cycle counted, and then calculate the current rotating speed of bucket wheel; If the current rotating speed of bucket wheel falls in the normal range of speed, then control executing mechanism continues operation; Otherwise control executing mechanism is shut down and output alarm signal.
10. bucket wheel rotary speed detecting system according to claim 9 is characterized in that: said setting-up time T1 is that bucket wheel rotates a circle the required time with rated speed of rotation.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100258457A CN102556685A (en) | 2012-02-07 | 2012-02-07 | Bucket-wheel rotation speed detecting system for bucket-wheel stacker-reclaimer |
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| CN2012100258457A CN102556685A (en) | 2012-02-07 | 2012-02-07 | Bucket-wheel rotation speed detecting system for bucket-wheel stacker-reclaimer |
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| CN102556685A true CN102556685A (en) | 2012-07-11 |
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| CN2012100258457A Pending CN102556685A (en) | 2012-02-07 | 2012-02-07 | Bucket-wheel rotation speed detecting system for bucket-wheel stacker-reclaimer |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107422751A (en) * | 2017-05-23 | 2017-12-01 | 中国神华能源股份有限公司 | Automatic material taking flow control methods and device for bucket wheel reclaimer |
| CN109264426A (en) * | 2018-09-21 | 2019-01-25 | 郑州中锣科技有限公司 | It is a kind of to turn over grain device for silo detection system |
| CN109311607A (en) * | 2016-06-27 | 2019-02-05 | 川崎重工业株式会社 | Bucket wheel |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109311607A (en) * | 2016-06-27 | 2019-02-05 | 川崎重工业株式会社 | Bucket wheel |
| CN109311607B (en) * | 2016-06-27 | 2020-07-10 | 川崎重工业株式会社 | Bucket wheel |
| CN107422751A (en) * | 2017-05-23 | 2017-12-01 | 中国神华能源股份有限公司 | Automatic material taking flow control methods and device for bucket wheel reclaimer |
| CN109264426A (en) * | 2018-09-21 | 2019-01-25 | 郑州中锣科技有限公司 | It is a kind of to turn over grain device for silo detection system |
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Application publication date: 20120711 |