CN103506191A - Automatic blockage regulation device and impact breaker - Google Patents
Automatic blockage regulation device and impact breaker Download PDFInfo
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- CN103506191A CN103506191A CN201310456654.0A CN201310456654A CN103506191A CN 103506191 A CN103506191 A CN 103506191A CN 201310456654 A CN201310456654 A CN 201310456654A CN 103506191 A CN103506191 A CN 103506191A
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Abstract
The invention discloses an automatic blockage regulation device and an impact breaker. The automatic blockage regulation device comprises a master control device, a current transformer, a counterattack plate solenoid valve and a resistor relay. The current transformer sends a collected current value of the winding motor of the impact breaker to the master control device, the control device controls the operation of a counterattack plate by controlling the operation of the counterattack plate solenoid valve, and the control device controls the torque of the winding motor by controlling the contact connection/disconnection of the relay. The automatic blockage regulation device and the impact breaker can automatically regulate the counterattack plate when an unforeseen blockage problem occurs, so as to prevent the production line from shutting down due to manual regulation and the impact breaker from being damaged due to blockage, monitor the working state of the breaker at any time, avoid the loss due to manual transport and production line shutdown, and can automatically shut down the breaker and give an alarm signal in the case of a serious failure.
Description
Technical field
The present invention relates to technical field of engineering machinery, relate in particular to a kind of automatic regulating apparatus that gets stuck, method and impact breaker of impact breaker.
Background technology
Impact breaker is a kind of crushing mechanism that utilizes impact energy to carry out broken material.During machine work, under the drive of motor, rotor high-speed rotation, when material enters bar active region, with epitrochanterian bar clash into broken, after thrown to again on counterattack device again broken, then from counterpunch board, bounce back into bar active region again again broken, this process repeats, until material is crushed to desired particle size, by discharging opening, is discharged.The spacing of adjusting between counterpunch board and rotor can reach the object that changes material discharging-material size and material shapes.
As shown in Figure 1, impact breaker is mainly comprised of parts such as shell 7, rotor 4, bar 5, impact rack 2, impact rack adjusting device 1, counterpunch board 3, abrasion-proof backing block 6, auxiliary hood-opening devices 8.During machine work, under the drive of motor, rotor high-speed rotation, when material enters bar active region, with epitrochanterian bar clash into broken, after thrown to again on counterpunch board again broken, then from counterpunch board, bounce back into bar active region again again broken, this process repeats, until material is crushed to desired particle size, by discharging opening, is discharged.Counterpunch board is fixed on impact rack, by adjusting the angle of impact rack, can change the spacing between counterpunch board and rotor, thereby adjusts discharging size.At present, can't when getting stuck generation, automatically adjust counterpunch board, material can not pass through, and even can to impact breaker, damage because of the problem getting stuck.
Summary of the invention
In view of this, the technical problem that the present invention will solve is to provide a kind of automatic regulating apparatus that gets stuck, and can control the motion of counterpunch board and the rotating speed of coiling electric motor.
An automatic regulating apparatus, comprising: master control set, current transformer, counterpunch board magnetic valve and resistor relay; Described master control set is electrically connected to described current transformer, described counterpunch board magnetic valve and described resistor relay respectively; Described current transformer sends to described master control set by the current values of the coiling electric motor of the impact breaker of measurement; Described counterpunch board magnetic valve is arranged in the hydraulic circuit of controlling impact plate of impact crusher motion; The resistance of the resistor that the rotor of described resistor Control and described coiling electric motor is in series; Wherein, described control device, by controlling the action of described counterpunch board magnetic valve, is controlled the motion of described counterpunch board; Described control device, by controlling the contact adhesive of described relay, is controlled the torque of described coiling electric motor.
According to one embodiment of present invention, further, also comprise: A/D conversion equipment; Wherein, the current values that described current transformer is measured sends to described master control set after described A/D conversion equipment is converted into direct current signal.
According to one embodiment of present invention, further, also comprise: fairing and filter; Wherein, the current values that described current transformer is measured sends to described master control set through described fairing, described filter, described A/D conversion equipment successively.
According to one embodiment of present invention, further, also comprise amplifying device; Wherein, the current values that described current transformer is measured sends to described master control set through described fairing, described filter, described amplifying device, described A/D conversion equipment successively.
According to one embodiment of present invention, further, also comprise: alarm lamp; Described alarm lamp is electrically connected to described master control set.
The present invention also provides following technical scheme:
An automatic adjusting method for the automatic regulating apparatus that gets stuck as above, described master control set sends and obtains current signal to described current transformer at interval of very first time interval, described master control set obtains the current values of coiling electric motor, described current values and default current threshold are compared, when described current values is greater than described current threshold, the second default time interval of described master control set interval sends and obtains current signal to described current transformer, when the current values of this coiling electric motor obtaining is also greater than described current threshold, described master control set moves by controlling described counterpunch board magnetic valve, make counterpunch board move to backward precalculated position, described master control set is the contact adhesive of control resistor relay simultaneously, make described coiling electric motor be operated in the starting state of the large torque of the slow-speed of revolution, after the start-up time default through coiling electric motor, master control set obtains current signal to current transformer.When if the current values of the coiling electric motor this time obtaining is still greater than described current threshold, control this impact breaker out of service and send alarm signal; When if the current values of the coiling electric motor this time obtaining is less than described current threshold, described master control set is controlled the action of counterpunch board magnetic valve, makes counterpunch board normal operation.
, comprise the automatic regulating apparatus that gets stuck as above.
The automatic regulating apparatus that gets stuck of the present invention, method and impact breaker, can automatically adjust counterpunch board while occurring unforeseen getting stuck, avoid artificial the adjust production line stop causing and the destruction getting stuck to impact breaker, monitor at any time disintegrating machine duty; For generic failure, automatically adjust solution, avoid a dead lift and production line stop to cause damage, for significant trouble judgement, autostop also sends alarm signal.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the schematic diagram of impact breaker in prior art;
Fig. 2 is according to the schematic diagram of an embodiment of the automatic regulating apparatus that gets stuck of impact breaker of the present invention;
Fig. 3 is according to the flow chart of the automatic adjusting method that gets stuck of the present invention embodiment.
The specific embodiment
With reference to the accompanying drawings the present invention is described more fully, exemplary embodiment of the present invention is wherein described.Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
As shown in Figure 2, the automatic regulating apparatus that gets stuck of impact breaker comprises: master control set 16, current transformer 11, counterpunch board magnetic valve 17 and resistor relay 18.
Master control set 16 is electrically connected to current transformer 11, counterpunch board magnetic valve 17 and resistor relay 18 respectively.Current transformer 11 sends to master control set 16 by the current values of the coiling electric motor of the impact breaker of measurement.
Counterpunch board magnetic valve 17 is arranged in the hydraulic circuit of controlling impact plate of impact crusher motion.Relay is a kind of electric control device, is when the variation of input quantity reaches regulation requirement, makes controlled volume that a kind of electrical equipment that predetermined step changes occurs in electric output circuit.
The resistance of the resistor that the rotor of 18 controls of resistor relay and coiling electric motor is in series.Magnetic valve is a kind of industrial equipment for Electromagnetic Control, is direction, flow, speed and other the parameter of adjusting medium in Industry Control for controlling the automation foundation element of fluid, belong to actuator, being used in.
Coiling electric motor is winding motor, is a kind of of asynchronous machine, because its rotor core is wound with a pair of symmetric winding identical with stator poles, gains the name.Coiling electric motor is a kind of motor with variable rotor resistance, has larger detent torque and low speed torque.Resistor is the controllable component of coiling electric motor, it is a part for coiling electric motor, be connected in rotor loop, by switch, optionally access the resistance of different resistances, by the resistance of regulating resistor, change the resistance of rotor loop, and then the characteristic working curve of change motor, make it when low speed, there is the characteristic of large torque.Relay is the intermediate member of control resistor switch, is the intermediary that motor primary circuit is connected with controller.
Control device 16, by controlling the action of counterpunch board magnetic valve 17, is controlled the motion of counterpunch board.Control device 16, by control relay 18 contact adhesive, is controlled the torque of coiling electric motor.
The power source of impact breaker adopts winding motor, motor rotation blockage when getting stuck, and motor speed reduces, and moment of torsion reduces, and electric current raises simultaneously.When increasing to setting value, electric current produces corresponding signal, be sent to coiling electric motor resistor relay, adjust coiling electric motor to starting state (low rotation speed large torque), synchronous signal is sent to counterpunch board magnetic valve counterpunch board is automatically moved back, larger material be able to by, after certain hour, counterpunch board returns to initial position, and production line continues normal operation; If be adjusted at after setting-up time, get stuck and still can not eliminate, autostop.
According to one embodiment of present invention, master control set 16 can be accomplished in several ways, for example single-chip microcomputer, single board computer, integrated circuit etc.Single-chip microcomputer is a kind of IC chip, adopts very large scale integration technology that the functions such as central processor CPU, random access memory ram, read only memory ROM, multiple I/O mouth and interrupt system, timer, timer with data storage capacities are integrated into the little and perfect microcomputer system forming on a silicon chip.
According to one embodiment of present invention, device can all comprise with lower device, also can comprise one or combination with lower device: A/D conversion equipment 15, fairing 12, filtering fill and 13 puts, amplifying device 14.The current values that current transformer 11 is measured sends to master control set 16 after A/D conversion equipment 15 is converted into direct current signal, or the current values that current transformer 11 is measured sends to A/D conversion equipment 14 through fairing 12, filter 13 and amplifying device 14 successively.Also comprise alarm lamp 19, alarm lamp 19 is electrically connected to master control set 16.
As shown in Figure 3, a kind of automatic adjusting method of the automatic regulating apparatus that gets stuck as above:
Step 301-303, by the switch on adjusting device, starts automatic regulating function.
Step 304, master control set sends and obtains current signal to current transformer at interval of very first time interval.Master control set obtains the current values of coiling electric motor, and current values and default current threshold are compared.
Step 306-308, when current values is greater than current threshold, the second default time interval of master control set interval sends and obtains current signal to current transformer.
Step 309-311, when the current values of this coiling electric motor obtaining is also greater than current threshold, master control set moves by controlling counterpunch board magnetic valve, make counterpunch board move to backward precalculated position, master control set is the contact adhesive of control resistor relay simultaneously, makes coiling electric motor be operated in the starting state of the large torque of the slow-speed of revolution.
According to the characteristic working curve of motor, if motor rotation blockage (or rotating speed rapid drawdown), the torque of general asynchronous machine also can decline to a great extent, and makes motor stalling.And the detent torque of coiling electric motor (when rotating speed is lower) increases along with the increase of rotor resistance, make the torque increasing by access resistance can make up a part because the torque that low speed forms declines.The effect of relay is exactly the switch in closed electrical resistor, accesses suitable resistance, while making the slow-speed of revolution, also can produce larger torque.
Step 312, after the start-up time default through coiling electric motor, master control set obtains current signal to current transformer.
Step 313-314, if when the current values of the coiling electric motor this time obtaining is still greater than current threshold, controls coiling electric motor out of service, and controls alarm lamp flicker.
Step 315, if when the current values of the coiling electric motor this time obtaining is less than current threshold, master control set is controlled the action of counterpunch board magnetic valve, makes counterpunch board normal operation.
According to one embodiment of present invention; very first time interval, the parameter value in second time interval can be set according to specific circumstances; very first time interval and second time interval can be adjusted according to production scene; but must not be greater than the setting time of electric motor protecting, and second time interval should be less than very first time interval.For example, the very first time is spaced apart 100ms.Second time interval was 10ms.
According to one embodiment of present invention, a kind of impact breaker comprises the automatic regulating apparatus that gets stuck of impact breaker as above.
According to one embodiment of present invention, because the motor rotation blockage of impact breaker is due to the generation that gets stuck substantially, the feature that during according to stall, current of electric sharply raises, current transformer 11 in switch cubicle provides detection electric current, through rectification circuit 12, filter circuit 13, amplifying circuit 14, A/D change-over circuit 15, be converted to the discernible direct current signal of single-chip microcomputer, send master control set 16 to.
Master control set 16 reads primary current signal at interval of T1, and compares with predetermined current value.If sample rate current numerical value is greater than predetermined current, 2 times of interval T are carried out primary current sampling again, with the contingency factor of remover apparatus.If double sampling electric current is all greater than predetermined current, master control set 16 output alarm signals, control 17 actions of counterpunch board magnetic valve, and counterpunch board is moved backward, the 18 contact adhesives of coiling electric motor resistor relay, make coiling electric motor be operated in the starting state of the large torque of the slow-speed of revolution simultaneously.After coiling electric motor starting state completes, again read sample rate current.If electric current is still greater than setting value, the broken fault of judgement counterattack is more serious, needs manual adjustment, hard stop, and warning lamp 19 flickers are simultaneously reported to the police; If electric current is less than setting value,, within normal range of operation, illustrate that the fault that gets stuck is got rid of, master control set 16 is controlled counterpunch board magnetic valves 9 and is returned to reset condition, and broken continuation of counterattack works.
The automatic regulating apparatus that gets stuck, method and the impact breaker of impact breaker of the present invention; unforeseen getting stuck, automatically adjust counterpunch board while occurring; expand crusher chamber the material blocking is passed through, avoid artificial the adjust production line stop causing and the destruction getting stuck to impact breaker.
The automatic regulating apparatus that gets stuck, method and the impact breaker of impact breaker of the present invention, be operated under automatic control mode, can artificial selection, and the fault erroneous judgement that convenient debugging causes; Master control set can adopt single-chip microcomputer to control, and is convenient to the adjustment and escalation of different operating modes; Automatically the judgement that gets stuck, monitors disintegrating machine duty at any time; For generic failure, automatically adjust solution, avoid a dead lift and production line stop to cause damage, for significant trouble judgement, autostop also sends alarm signal.
May realize in many ways method and system of the present invention.For example, can realize method and system of the present invention by any combination of software, hardware, firmware or software, hardware, firmware.The said sequence that is used for the step of method is only in order to describe, and the step of method of the present invention is not limited to above specifically described order, unless otherwise specified.In addition, in certain embodiments, can be also the program being recorded in recording medium by the invention process, these programs comprise for realizing the machine readable instructions of the method according to this invention.Thereby the present invention also covers storage for carrying out the recording medium of the program of the method according to this invention.
Description of the invention provides for example with for the purpose of describing, and is not exhaustively or limit the invention to disclosed form.Many modifications and variations are obvious for the ordinary skill in the art.Selecting and describing embodiment is for better explanation principle of the present invention and practical application, thereby and makes those of ordinary skill in the art can understand the various embodiment with various modifications that the present invention's design is suitable for special-purpose.
Claims (7)
1. the automatic regulating apparatus that gets stuck, is characterized in that, comprising:
Master control set, current transformer, counterpunch board magnetic valve and resistor relay;
Described master control set is electrically connected to described current transformer, described counterpunch board magnetic valve and described resistor relay respectively;
Described current transformer sends to described master control set by the current values of the coiling electric motor of the impact breaker of collection; Described counterpunch board magnetic valve is arranged in the hydraulic circuit of controlling impact plate of impact crusher motion; The resistance of the resistor that the rotor of described resistor Control and described coiling electric motor is in series;
Wherein, described control device, by controlling the action of described counterpunch board magnetic valve, is controlled the motion of described counterpunch board; Described control device, by controlling the contact adhesive of described relay, is controlled the torque of described coiling electric motor.
2. device as claimed in claim 1, is characterized in that:
Also comprise: A/D conversion equipment;
Wherein, the current values that described current transformer is measured sends to described master control set after described A/D conversion equipment is converted into direct current signal.
3. device as claimed in claim 2, is characterized in that:
Also comprise: fairing and filter;
Wherein, the current values that described current transformer is measured sends to described master control set through described fairing, described filter, described A/D conversion equipment successively.
4. device as claimed in claim 3, is characterized in that:
Also comprise amplifying device;
Wherein, the current values that described current transformer is measured sends to described master control set through described fairing, described filter, described amplifying device, described A/D conversion equipment successively.
5. device as claimed in claim 4, is characterized in that:
Also comprise: alarm lamp;
Described alarm lamp is electrically connected to described master control set.
6. an automatic adjusting method for the automatic regulating apparatus that gets stuck described in claim 1-5 any one, is characterized in that:
Described master control set sends and obtains current signal to described current transformer at interval of very first time interval;
Described master control set obtains the current values of coiling electric motor, described current values and default current threshold are compared, when described current values is greater than described current threshold, the second default time interval of described master control set interval sends and obtains current signal to described current transformer, when the current values of this coiling electric motor obtaining is also greater than described current threshold, described master control set moves by controlling described counterpunch board magnetic valve, make counterpunch board move backward and stop, described master control set is the contact adhesive of control resistor relay simultaneously, make described coiling electric motor be operated in the starting state of the large torque of the slow-speed of revolution,
After the start-up time default through coiling electric motor, master control set obtains current signal to current transformer, when if the current values of the coiling electric motor this time obtaining is still greater than described current threshold, control this impact breaker out of service and send alarm signal; When if the current values of the coiling electric motor this time obtaining is less than described current threshold, described master control set is controlled the action of counterpunch board magnetic valve, makes counterpunch board normal operation.
7. an impact breaker, is characterized in that:
Comprise the automatic regulating apparatus that gets stuck as described in claim 1-5 any one.
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| CN201310456654.0A CN103506191B (en) | 2013-09-29 | 2013-09-29 | One gets stuck automatic regulating apparatus, method and impact breaker |
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| CN201310456654.0A CN103506191B (en) | 2013-09-29 | 2013-09-29 | One gets stuck automatic regulating apparatus, method and impact breaker |
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| CN103506191B CN103506191B (en) | 2015-12-16 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104475226A (en) * | 2014-12-15 | 2015-04-01 | 徐州徐工施维英机械有限公司 | Starting-stopping control device, starting-stopping control method and crushing machine |
| CN106311449A (en) * | 2015-06-16 | 2017-01-11 | 徐工集团工程机械股份有限公司 | Vibrating feeder feeding speed control system and method, and crusher |
| CN109607102A (en) * | 2018-12-10 | 2019-04-12 | 君泰创新（北京）科技有限公司 | One kind gets stuck detection method, detection device and PVD equipment |
| CN112844639A (en) * | 2021-01-27 | 2021-05-28 | 温州市靖浩贸易有限公司 | Automatic proper amount material loading and avoid overloaded hydraulic crusher |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102225352A (en) * | 2011-04-06 | 2011-10-26 | 中冶长天国际工程有限责任公司 | Anti-blocking control method and system of single roller crusher |
| CN202078942U (en) * | 2010-05-03 | 2011-12-21 | 斐乐公司 | Crusher and equipment used for monitoring operation of crusher |
| CN202283485U (en) * | 2011-09-05 | 2012-06-27 | 杨加珍 | Novel pneumatic grinding mill control device |
| CN203565142U (en) * | 2013-09-29 | 2014-04-30 | 徐州徐工施维英机械有限公司 | Automatic material clamping adjusting device and impact crusher |
-
2013
- 2013-09-29 CN CN201310456654.0A patent/CN103506191B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202078942U (en) * | 2010-05-03 | 2011-12-21 | 斐乐公司 | Crusher and equipment used for monitoring operation of crusher |
| CN102225352A (en) * | 2011-04-06 | 2011-10-26 | 中冶长天国际工程有限责任公司 | Anti-blocking control method and system of single roller crusher |
| CN202283485U (en) * | 2011-09-05 | 2012-06-27 | 杨加珍 | Novel pneumatic grinding mill control device |
| CN203565142U (en) * | 2013-09-29 | 2014-04-30 | 徐州徐工施维英机械有限公司 | Automatic material clamping adjusting device and impact crusher |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104475226A (en) * | 2014-12-15 | 2015-04-01 | 徐州徐工施维英机械有限公司 | Starting-stopping control device, starting-stopping control method and crushing machine |
| CN106311449A (en) * | 2015-06-16 | 2017-01-11 | 徐工集团工程机械股份有限公司 | Vibrating feeder feeding speed control system and method, and crusher |
| CN106311449B (en) * | 2015-06-16 | 2019-06-21 | 徐工集团工程机械股份有限公司 | The control system and method and crusher of oscillating feeder delivery rate |
| CN109607102A (en) * | 2018-12-10 | 2019-04-12 | 君泰创新（北京）科技有限公司 | One kind gets stuck detection method, detection device and PVD equipment |
| CN109607102B (en) * | 2018-12-10 | 2023-09-29 | 德运创鑫(北京)科技有限公司 | Clamping detection method, detection device and PVD equipment |
| CN112844639A (en) * | 2021-01-27 | 2021-05-28 | 温州市靖浩贸易有限公司 | Automatic proper amount material loading and avoid overloaded hydraulic crusher |
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| CN103506191B (en) | 2015-12-16 |
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Effective date of registration: 20200509 Address after: 221004 Jiangsu city of Xuzhou province Xuzhou economic and Technological Development Zone of High Road No. 39 Patentee after: XUZHOU XCMG MINING MACHINERY Co.,Ltd. Address before: 221004 No. 29, Peach Road, Xuzhou economic and Technological Development Zone, Jiangsu Patentee before: XUZHOU XCMG SCHWING MACHINERY Co.,Ltd. |