CN111151369A - Shredder control system and control method - Google Patents
Shredder control system and control method Download PDFInfo
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- CN111151369A CN111151369A CN202010158730.XA CN202010158730A CN111151369A CN 111151369 A CN111151369 A CN 111151369A CN 202010158730 A CN202010158730 A CN 202010158730A CN 111151369 A CN111151369 A CN 111151369A
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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
- B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
- B02C18/0084—Disintegrating by knives or other cutting or tearing members which chop material into fragments specially adapted for disintegrating garbage, waste or sewage
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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
- B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
- B02C18/06—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives
- B02C18/16—Details
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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
- B02C2201/00—Codes relating to disintegrating devices adapted for specific materials
- B02C2201/06—Codes relating to disintegrating devices adapted for specific materials for garbage, waste or sewage
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- Environmental & Geological Engineering (AREA)
- Crushing And Pulverization Processes (AREA)
Abstract
The invention discloses a shredder control system, which comprises a load monitoring device, a power regulating device, a rotation regulating device and a control device, wherein the load monitoring device is electrically connected with the control device and outputs a monitored load signal of a knife roll to the control device; the power regulating and controlling device receives the torque control signal sent by the control device and controls the input torque and the rotating speed of the knife roll; the rotation regulating and controlling device receives a rotation control signal sent by the control device and controls the rotation direction and the start and stop of the knife roll; the control device receives a load signal of the knife roller sent by the load monitoring device and generates a moment control signal or a rotation control signal according to a preset processing program. The invention also discloses a shredder control method, which comprises the following steps: the load monitoring device outputs the monitored load signal of the knife roll to the control device; the control device generates a moment control signal or a rotation control signal according to a preset processing program so as to adjust the input moment and the rotating speed of the knife roll or control the rotating direction and the start and stop of the knife roll.
Description
Technical Field
The invention belongs to the technical field of machinery, and particularly relates to a shredder control system and a shredder control method.
Background
In the prior art, a shredder provided with a knife roll is adopted to crush materials such as waste steel bars and then recycle the materials. The main structure of the shredder comprises a power device, a knife roller, a control system and a feed hopper. The feeding conveyer belt conveys materials such as waste steel bars to a feeding hopper and pours the materials to a knife roller; the power device provides power for the rotation of the knife rolls, the two knife rolls rotate relatively, and the teeth on the two knife rolls cut and tear the waste steel bars into particles. Since the power of the power plant of the shredder is fixed, the input power of the knife roll is the product of the knife roll input torque and the knife roll rotation speed. When the input power of the knife roller is constant, the input torque of the knife roller is in inverse proportion to the rotating speed of the knife roller. Therefore, when the input torque is increased, the rotating speed of the knife roller is necessarily reduced; when the rotation speed of the knife roller is increased, the input torque is inevitably reduced.
In actual operation, the load of the knife roll can change along with the quantity of the waste steel bars conveyed into the feed hopper and the specification of the waste steel bars. When the number of the waste reinforcing bars is increased or the specification is increased, the load of the cutter roller is increased. If the input torque on the knife roll cannot be increased, the input torque of the knife roll is smaller than the load torque of the knife roll, and the knife roll is locked. Shredder equipment among the prior art needs operating personnel to handle in case the locked rotor, and is consuming time long, and is efficient, and working strength is high. When the number of the waste reinforcing bars is reduced or the specification is reduced, the load of the cutter roller is reduced. If the rotating speed of the knife roll cannot be increased at the moment, the knife roll can shear more steel bars in unit time, so that the shredder is in small load and even runs in an idle mode, the load rate of the shredder is low, energy waste is serious, and the production efficiency is low.
In summary, it is desirable to provide a shredder control system and a control method thereof to solve the problem that the existing shredder in the prior art cannot automatically adjust the input torque and the rotation speed of the knife roll according to the load of the knife roll; the shredder can not automatically process the locked rotor, needs manual processing, and has the technical problems of long processing time, high working strength, low working efficiency and the like.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the shredder control system and the control method are provided to solve the problems that the existing shredder in the prior art can not automatically adjust the input torque and the rotating speed of the knife roll according to the load of the knife roll, and the equipment efficiency is low; the automatic locked rotor treatment device can not automatically treat locked rotor, needs manual treatment, and has the technical problems of long treatment time, high working strength, low working efficiency and the like.
In order to achieve the purpose, the invention adopts the technical scheme that:
a shredder control system is used for controlling the operation of a shredder knife roller and comprises a load monitoring device, a power regulating device, a rotation regulating device and a control device,
the load monitoring device is connected with the power regulating and controlling device to monitor a load signal of the cutter roller, is electrically connected with the control device and outputs the monitored load signal of the cutter roller to the control device;
the power regulating and controlling device is connected with the knife roll to drive the knife roll to rotate, is electrically connected with the control device, receives a torque control signal sent by the control device and controls the input torque and the rotating speed of the knife roll;
the rotary regulating and controlling device is arranged in a power input loop of the power regulating and controlling device, is electrically connected with the control device, receives a rotary control signal sent by the control device and controls the rotating direction and the starting and stopping of the knife roll;
the control device receives a load signal of the knife roll sent by the load monitoring device and generates a moment control signal or a rotation control signal according to a preset processing program, the moment control signal is output to the power regulating and controlling device to regulate the input moment of the knife roll, and the rotation control signal is output to the rotation regulating and controlling device to control the rotation direction and start and stop of the knife roll.
The shredder control system in the scheme can enable the shredder to monitor the change of the load of the knife roll of the shredder in real time, and automatically adjust the torque transmitted to the knife roll by the power device. Under the condition that the load of the knife roller is small, the rotating speed of the knife roller is increased, the working efficiency of the shredder is improved, and the waste of energy is reduced; under the condition of large load of the knife roller, the moment transmitted to the knife roller by the power device is improved, the probability of locked rotor of the shredder is reduced, and the working efficiency is improved; the working state that the rotor is blocked is monitored in time, and the reverse rotation of the rotor is automatically started, so that the rotor is recovered from the blocked state, and then the normal working state is recovered. The shredder control system in the scheme can improve the rotating speed of the knife roll and reduce the waste of energy under the condition that the load of the knife roll is small; under the condition that the load of the knife roll is large, the input torque of the knife roll is increased, the probability of the rotation blockage of the shredder is reduced, and therefore the working efficiency and the service life of the shredder are greatly improved.
In another preferred embodiment, the control device comprises a microprocessor, a touch control device and a hand operation box, wherein the microprocessor is in communication connection with the touch control device, and is electrically connected with the hand operation box. And the touch device sends data to the microprocessor, and the touch device reads and displays the data in the microprocessor.
In another preferred embodiment, the manual operation box is provided with a knife roller forward rotation button, a knife roller reverse rotation button and a knife roller stop button.
In another preferred embodiment, the power regulating device is an electric proportional hydraulic motor, and the electric proportional hydraulic motor is connected with the knife roller to drive the knife roller to rotate; the electric proportional hydraulic oil motor is electrically connected with the control device, receives a torque control signal sent by the control device and controls the input torque and the rotating speed of the knife roll.
In another preferred embodiment, the load monitoring device is a pressure sensor, and the pressure sensor is installed on a hydraulic oil pipeline of the electric proportional hydraulic motor to monitor the hydraulic oil pressure of the electric proportional hydraulic motor and generate a load signal of the knife roll; the pressure sensor is electrically connected with the control device and sends a load signal of the knife roll to the control device.
In another preferred embodiment, the rotation regulating device is an electromagnetic directional valve, the electromagnetic directional valve is installed in a hydraulic oil pipeline of the electric proportional hydraulic motor, and the electromagnetic directional valve controls the flow direction of a hydraulic oil loop of the electric proportional hydraulic motor to control the rotation direction and start and stop of the electric proportional hydraulic motor, so as to control the rotation direction and start and stop of the knife roll.
In another preferred embodiment, the shredder control system is connected with the hydraulic power device of the shredder, the hydraulic power device is used for providing power for the power regulation and control device, the hydraulic power device comprises an oil pump, a motor and a hydraulic oil tank, the oil pump is mechanically connected with the motor, the oil pump is connected with the hydraulic oil tank through a pipeline, and the oil pump is connected with the electric proportional hydraulic motor through a hydraulic oil pipeline.
The invention also discloses a shredder control method, which comprises the following steps:
the load monitoring device outputs the monitored load signal of the knife roller to the control device;
the control device receives a load signal of the knife roll sent by the load monitoring device and generates a moment control signal or a rotation control signal according to a preset processing program, the moment control signal is output to the power regulating and controlling device to regulate the input moment and the rotating speed of the knife roll, and the rotation control signal is output to the rotation regulating and controlling device to control the rotating direction and start and stop of the knife roll;
the processing program comprises: when the load signal is larger than a second threshold value, the control device generates a control signal for increasing the moment; when the load signal is smaller than a first threshold value, the control device generates a control signal for increasing the rotating speed of the knife roller; when the load signal is greater than a third threshold value, the control device judges that the knife roll is locked, and the control device controls the knife roll to sequentially execute the working procedures of stopping rotation, reversely rotating for a specified time, stopping rotation and finally rotating forwards through the rotation regulating and controlling device; wherein the third threshold is greater than the second threshold and greater than the first threshold.
In another preferred embodiment, the power control device is an electric proportional hydraulic motor, the load monitoring device is a pressure sensor, and the rotation control device is a solenoid directional valve, and the method includes the following steps:
s1, the pressure sensor outputs the monitored load signal of the knife roller to the control device;
s2, the control device receives a load signal of the knife roll sent by the pressure sensor and executes the action process of the electric proportional hydraulic motor firstly;
and S3, executing the action process of the electromagnetic directional valve.
In another preferred embodiment, the step S2 specifically includes: when the load signal is larger than a second threshold value, the control device generates a control signal for increasing the output torque of the electric proportional hydraulic motor; when the load signal is smaller than a first threshold value, the control device generates a control signal for increasing the rotating speed of the knife roller; the step S3 specifically includes: when the load signal is greater than a third threshold value, the control device judges that the knife roll is locked, and the control device controls the knife roll to sequentially execute the working processes of stopping rotation, reversely rotating for a specified time, stopping rotation and finally normally rotating through the valve position transition of the electromagnetic directional valve; wherein the third threshold is greater than the second threshold and greater than the first threshold.
The technical scheme of the invention has the beneficial technical effects that:
the shredder control system has the following beneficial effects:
1. the shredder control system can automatically adjust the input torque of the knife roll according to the real-time load condition of the knife roll so as to improve the rotating speed of the knife roll, reduce the load rate of the shredder and reduce the waste of energy under the condition of small load of the knife roll; under the condition that the load of the knife roll is large, the input torque of the knife roll is increased, the probability of the rotation blockage of the shredder is reduced, and the working efficiency of the shredder is improved.
2. The shredder control system can automatically monitor and process the locked rotor of the knife roll, does not need an operator to manually process, has short automatic processing time and high working efficiency, reduces the working strength of the operator, and greatly improves the working efficiency of the shredder.
3. According to the shredder control method, the processing program is preset in the control device, the change of the load of the shredder knife roller can be sensed in real time, whether the knife roller is locked or not is judged automatically, the shredder can automatically start and quit the locked processing program under the condition that the knife roller is locked, the control device controls the knife roller to sequentially carry out the working procedures of automatic stop, automatic reverse rotation starting, automatic stop and automatic forward rotation, manual processing of operators is not needed, the working strength of the operators is reduced, the locked processing time of the shredder is shortened, and the working efficiency of the shredder is improved remarkably.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention.
FIG. 1 is a schematic diagram of the connection between a control device and other components in one embodiment;
FIG. 2 is a block diagram of another embodiment shredder control system;
FIG. 3 is a flow chart of the operation of another embodiment shredder control method;
FIG. 4 is a schematic diagram of the operation of an electro-proportional hydraulic motor in another embodiment of a shredder control method;
FIG. 5 is a schematic diagram illustrating the flow of operation of a solenoid operated directional valve in a shredder control method according to another embodiment;
FIG. 6 is a schematic diagram illustrating a flow of automatic rotation-blocking operation of the knife roller in another embodiment of a shredder control method.
Reference numerals:
10-power regulation and control device 11-electric proportional hydraulic motor 20-control device 21-microprocessor
22-touch control device 23-hand operation box 30-rotary regulating and controlling device 31-electromagnetic directional valve
40-load monitoring device 41-pressure sensor 50-hydraulic power device 51-oil pump
52-electric machine
Detailed Description
The present invention will now be described in detail with reference to the drawings, which are given by way of illustration and explanation only and should not be construed to limit the scope of the present invention in any way. Furthermore, features from embodiments in this document and from different embodiments may be combined accordingly by a person skilled in the art from the description in this document.
Referring to fig. 1, a shredder control system according to an embodiment of the present invention is used for controlling the operation of a shredder blade roller, and includes a load monitoring device 40, a power control device 10, a rotation control device 30 and a control device 20, wherein the load monitoring device 40 is connected to the power control device 10 for monitoring a load signal of the blade roller, and the load monitoring device 40 is electrically connected to the control device 20 and outputs the monitored load signal of the blade roller to the control device 20; the power regulating device 10 is connected with the knife roll to drive the knife roll to rotate, the power regulating device 10 is electrically connected with the control device 20, receives a moment control signal sent by the control device 20 and controls the input moment and the rotating speed of the knife roll; the rotation regulating device 30 is arranged in a power input loop of the power regulating device 10, the rotation regulating device 30 is electrically connected with the control device 20, receives a rotation control signal sent by the control device 20 and controls the rotation direction and the start and stop of the knife roll; the control device 20 receives the load signal of the knife roll sent by the load monitoring device 40, and generates a torque control signal or a rotation control signal according to a preset processing program, the torque control signal is output to the power regulating device 10 to regulate the input torque of the knife roll, and the rotation control signal is output to the rotation regulating device 30 to control the rotation direction and start and stop of the knife roll.
The shredder control system in the embodiment can enable the shredder to monitor the change of the load of the knife roller of the shredder in real time, and automatically adjust the moment transmitted to the knife roller by the power device. Under the condition that the load of the knife roller is small, the rotating speed of the knife roller is increased, the working efficiency of the shredder is improved, and the waste of energy is reduced; under the condition of large load of the knife roller, the moment transmitted to the knife roller by the power device is improved, the probability of locked rotor of the shredder is reduced, and the working efficiency is improved; the working state that the rotor is blocked is monitored in time, and the reverse rotation of the rotor is automatically started, so that the rotor is recovered from the blocked state, and then the normal working state is recovered. The shredder control system in the scheme can improve the rotating speed of the knife roll and reduce the waste of energy under the condition that the load of the knife roll is small; under the condition that the load of the knife roll is large, the input torque of the knife roll is increased, the probability of the rotation blockage of the shredder is reduced, and therefore the working efficiency and the service life of the shredder are greatly improved.
The embodiment also comprises a shredder control method, which specifically comprises the following steps:
A. the load monitoring device 40 outputs the monitored load signal of the knife roll to the control device 20;
B. the control device 20 receives the load signal of the knife roll sent by the load monitoring device 40, and generates a torque control signal or a rotation control signal according to a preset processing program, the torque control signal is output to the power regulating device 10 to regulate the input torque and the rotating speed of the knife roll, and the rotation control signal is output to the rotation regulating device 30 to control the rotating direction and start and stop of the knife roll; wherein the processing program comprises: when the load signal is greater than the second threshold, the control device 20 generates a control signal for increasing the torque; when the load signal is less than the first threshold value, the control device 20 generates a control signal for increasing the rotation speed of the knife roll; when the load signal is greater than the third threshold value, the control device 20 judges that the knife roll is locked, and the control device 20 controls the knife roll to sequentially execute the working procedures of stopping rotation, reversely rotating for a specified time, stopping rotation and finally rotating in the forward direction through the rotation regulating device 30; wherein the third threshold is greater than the second threshold and greater than the first threshold.
Wherein, the step B specifically comprises two steps:
b1, the operation flow of the power regulating device 10: the control device 20 receives the load signal of the knife roll sent by the load monitoring device 40, judges whether the signal is greater than a second threshold (15 Mpa in the embodiment), and if the signal is greater than the second threshold, the flow of the power regulating device 10 is increased to increase the input torque of the knife roll; if the signal is not greater than the second threshold (15 Mpa in this embodiment), it is determined whether it is smaller than the first threshold (8 Mpa in this embodiment), if so, the flow rate of the power control device 10 is reduced to increase the rotation speed of the knife roll, and if not, the operation flow is ended.
B2, operation flow of the rotation control device 30: the control device 20 receives the load signal of the knife roll sent by the load monitoring device 40, and determines whether the signal is greater than a third threshold (18 Mpa in this embodiment), and if the signal is greater than the third threshold, the knife roll is started to exit the locked-rotor operation process, that is, the rotation control device 30 controls the knife roll to sequentially execute the work processes of stopping rotation, reversely rotating for a specified time, stopping rotation, and finally forward rotating; if the signal is not greater than the third threshold, the operation flow is ended.
The shredder control method of the embodiment can sense the change of the load of the shredder knife roller in real time by presetting the processing program in the control device 20, automatically judges whether the knife roller is locked, the shredder can automatically start and quit the processing program of the locked rotation under the condition of the locked rotation of the knife roller, the control device 20 controls the knife roller to sequentially carry out the work flows of automatic stop, automatic reverse rotation starting, automatic stop and automatic forward rotation, the manual processing of operators is not needed, the working strength of the operators is reduced, the processing time of the locked rotation of the shredder is reduced, and the working efficiency of the shredder is obviously improved.
Referring to fig. 2, in another preferred embodiment, the control device 20 includes a microprocessor 21, a touch device 22, and a hand box 23, the microprocessor 21 is connected to the touch device 22 in communication, and the microprocessor 21 is electrically connected to the hand box 23. The touch device 22 sends data to the microprocessor, and the touch device 22 reads and displays the data in the microprocessor 21. Wherein, the manual operation box 23 is provided with a knife roller positive rotation button, a knife roller negative rotation button and a knife roller stop button. The operator can operate the touch device 22 to set the control parameters, and the touch device 22 transmits the control parameters to the microprocessor 21. The control parameters include: second pressure threshold value P for increasing the flow of the electro-proportional hydraulic motor 112First pressure threshold value P for reducing flow of electric proportional hydraulic motor 111And a third pressure threshold value P for judging the rotor blockage of the cutter roller3(ii) a The touch device 22 displays the read status data of the microprocessor 21, and the status data includes: and the hydraulic oil pressure value P and the displacement V of the hydraulic motor of the electric proportional motor. The manual operation box 23 is held by an operator or fixedly installed, the operator can manually control the forward rotation, the reverse rotation and the stop of the knife roller by operating a button on the manual operation box 23, and the priority level of a control signal of the manual operation box 23 is higher than that of an automatic control signal of the microprocessor 21.
Wherein, the power regulating device 10 is an electric proportional hydraulic motor 11, and the electric proportional hydraulic motor 11 is connected with the knife roll to drive the knife roll to rotate; the electric proportional hydraulic oil motor is electrically connected with the control device 20, receives a torque control signal sent by the control device 20 and controls the input torque and the rotating speed of the knife roll. The electric proportional hydraulic motor 11 is electrically connected with the microprocessor 21, the microprocessor 21 sends a control signal to the electric proportional hydraulic motor 11, and the electric proportional hydraulic motor 11 adjusts the flow according to the received control signal, so that the torque input to the knife roll by the electric proportional hydraulic motor 11 is adjusted. When the flow is increased, the torque input to the knife roll by the electric proportional hydraulic motor 11 is increased, the knife roll can bear larger load, larger or more steel bars can be sheared, and the probability of the rotation blockage of the knife roll is low; when the flow is reduced, the rotating speed of the electric proportional hydraulic motor 11 is increased, so that the cutter roller is driven to rotate faster, the material shearing speed of the cutter roller is increased, the idle running or small-load running time of the cutter roller is short, and the production efficiency of equipment is high.
Continuing to refer to fig. 2, the load monitoring device 40 is a pressure sensor 41, and the pressure sensor 41 is installed on the hydraulic oil pipeline of the electric proportional hydraulic motor 11 to monitor the hydraulic oil pressure of the electric proportional hydraulic motor 11 and generate a load signal of the knife roll; the pressure sensor 41 is electrically connected to the control device 20, and transmits a load signal of the blade roller to the control device 20. The pressure sensor 41 monitors the pressure of the hydraulic oil, converts the pressure into an electric signal and sends the electric signal to the microprocessor 21, and the microprocessor 21 senses the load change of the knife roll by detecting the electric signal sent by the pressure sensor 41.
In this embodiment, the rotation control device 30 is an electromagnetic directional valve 31, the electromagnetic directional valve 31 is installed in a hydraulic oil pipeline of the electric proportional hydraulic motor 11, and the electromagnetic directional valve 31 controls the flow direction of a hydraulic oil loop of the electric proportional hydraulic motor 11 to control the rotation direction and start and stop of the electric proportional hydraulic motor 11, so as to control the rotation direction and start and stop of the knife roll. The electromagnetic directional valve 31 is electrically connected with the microprocessor 21, the microprocessor 21 sends a control signal to the electromagnetic directional valve 31, the electromagnetic directional valve 31 receives the control signal, the processor controls the electromagnetic directional valve 31 to be switched to a forward rotation valve position, hydraulic oil flows in from the port A and the port B of the electric proportional hydraulic motor 11 through the electromagnetic directional valve 31, and the electric proportional hydraulic motor 11 rotates forward, so that a cutter roll mechanically connected with the electric proportional hydraulic motor 11 is driven to rotate forward; the microprocessor 21 controls the electromagnetic directional valve 31 to switch to a reverse valve position, hydraulic oil flows in from the port B of the electric proportional hydraulic motor 11 through the electromagnetic directional valve 31, flows out from the port A, and the electric proportional hydraulic motor 11 reverses, so that a knife roll mechanically connected with the electric proportional hydraulic motor 11 is driven to reverse; the microprocessor 21 controls the electromagnetic directional valve 31 to switch to the stop valve position, no hydraulic oil passes through the electro-hydraulic proportional hydraulic motor 11, the electro-hydraulic proportional hydraulic motor 11 stops, and the knife roll mechanically connected with the electro-hydraulic proportional hydraulic motor 11 stops.
Referring to FIG. 3, a method of controlling the shredder control system of FIG. 2 includes the steps of:
s1, the pressure sensor 41 outputs the monitored load signal of the knife roll to the control device 20, and the hydraulic oil pressure read by the pressure sensor 41 is P;
s2, the control device 20 receives the load signal of the knife roller sent by the pressure sensor 41, and executes the operation flow of the electric proportional hydraulic motor 11 according to the preset processing program;
s3, the control device 20 receives the load signal of the knife roll from the pressure sensor 41, and then executes the operation flow of the electromagnetic directional valve 31.
Referring to fig. 4, the operation flow of the electro-proportional hydraulic motor 11 specifically includes the following steps: the operation flow of the electro-proportional hydraulic motor 11 starts, firstly, whether the hydraulic oil pressure P is greater than a second pressure threshold value 15Mpa is judged, if the hydraulic oil pressure P is greater than the second pressure threshold value 15Mpa, the flow of the electro-proportional hydraulic motor 11 is increased, and the operation flow of the electro-proportional hydraulic motor 11 is ended; and if the hydraulic oil pressure P is not greater than the second pressure threshold value 15Mpa, continuously judging whether the hydraulic oil pressure P is less than the first pressure threshold value 8Mpa, if the hydraulic oil pressure P is less than the first pressure threshold value 8Mpa, reducing the flow of the electro-proportional hydraulic motor 11, and if the hydraulic oil pressure P is not less than the first pressure threshold value 8Mpa, ending the operation flow of the electro-proportional hydraulic motor 11.
Referring to fig. 5, the operation process of the electromagnetic directional valve 31 specifically includes the following steps: and the action process of the electromagnetic directional valve 31 is started, firstly, whether the hydraulic oil pressure P is the third pressure threshold value 18Mpa or not is judged, if the hydraulic oil pressure P is greater than the third pressure threshold value 18Mpa, the cutter roller automatically exits from the locked-rotor action process to start, and if the hydraulic oil pressure P is not greater than the third pressure threshold value 18Mpa, the action process of the electromagnetic directional valve 31 is ended.
Referring to fig. 6, the automatic rotation-blocking exit flow of the knife roll specifically includes the following steps: the knife roller automatically exits from the locked-rotor action process, firstly, the electromagnetic directional valve 31 is switched to a stop valve position, and the time is delayed for 2 seconds; then the electromagnetic directional valve 31 is switched to the reverse valve position, and the time delay is 6 seconds; then the electromagnetic directional valve 31 is switched to the stop valve position, and 2 seconds are delayed; and finally, switching the electromagnetic directional valve 31 to a forward rotation valve position, and automatically withdrawing the knife roll from the locked-rotor action process to end.
Referring to fig. 2, on the basis of the above embodiment, in another preferred embodiment, the shredder control system is connected with a hydraulic power unit 50 of the shredder, the hydraulic power unit 50 is used for providing power for the power regulating device 10 and comprises an oil pump 51, an electric motor 51 and a hydraulic oil tank, the oil pump 51 is mechanically connected with the electric motor 51, the oil pump 51 is connected with the hydraulic oil tank through a pipeline, and the oil pump 51 is connected with the electric proportional hydraulic motor 11 through a hydraulic oil pipeline.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A shredder control system is used for controlling the operation of a shredder knife roller and is characterized by comprising a load monitoring device, a power regulating device, a rotation regulating device and a control device;
the load monitoring device is connected with the power regulating and controlling device to monitor a load signal of the cutter roller, is electrically connected with the control device and outputs the monitored load signal of the cutter roller to the control device;
the power regulating and controlling device is connected with the knife roll to drive the knife roll to rotate, is electrically connected with the control device, receives a torque control signal sent by the control device and controls the input torque and the rotating speed of the knife roll;
the rotary regulating and controlling device is arranged in a power input loop of the power regulating and controlling device, is electrically connected with the control device, receives a rotary control signal sent by the control device and controls the rotating direction and the starting and stopping of the knife roll;
the control device receives a load signal of the knife roll sent by the load monitoring device and generates a moment control signal or a rotation control signal according to a preset processing program, the moment control signal is output to the power regulating and controlling device to regulate the input moment of the knife roll, and the rotation control signal is output to the rotation regulating and controlling device to control the rotation direction and start and stop of the knife roll.
2. The shredder control system of claim 1 wherein the control means includes a microprocessor, a touch control device and a hand box, the microprocessor communicatively coupled to the touch control device, the microprocessor electrically coupled to the hand box. And the touch device sends data to the microprocessor, and the touch device reads and displays the data in the microprocessor.
3. The shredder control system of claim 2 wherein the hand box has a knife roll forward button, a knife roll reverse button, and a knife roll stop button disposed thereon.
4. The shredder control system of claim 1 wherein the power modulating device is an electrically proportional hydraulic motor coupled to the cutter drum to drive the cutter drum in rotation; the electric proportional hydraulic oil motor is electrically connected with the control device, receives a torque control signal sent by the control device and controls the input torque and the rotating speed of the knife roll.
5. The shredder control system of claim 4 wherein the load monitoring device is a pressure sensor mounted on a hydraulic oil line of the electro-proportional hydraulic motor to monitor hydraulic oil pressure of the electro-proportional hydraulic motor and generate a load signal for the cutter drum; the pressure sensor is electrically connected with the control device and sends a load signal of the knife roll to the control device.
6. The shredder control system according to claim 4, wherein the rotation control device is a solenoid directional valve, the solenoid directional valve is installed in a hydraulic oil pipeline of the electro-proportional hydraulic motor, and the solenoid directional valve controls the flow direction of a hydraulic oil loop of the electro-proportional hydraulic motor to control the rotation direction and the start and stop of the electro-proportional hydraulic motor, so as to control the rotation direction and the start and stop of the knife roll.
7. The shredder control system according to claim 4, wherein the shredder control system is connected to a hydraulic power unit of the shredder, the hydraulic power unit being configured to provide power to the power conditioning apparatus, the hydraulic power unit including an oil pump, a motor and a hydraulic tank, the oil pump being mechanically connected to the motor, the oil pump being connected to the hydraulic tank via a conduit, the oil pump being connected to the electro-proportional hydraulic motor via a hydraulic oil conduit.
8. A shredder control method, comprising the steps of:
the load monitoring device outputs the monitored load signal of the knife roller to the control device;
the control device receives a load signal of the knife roll sent by the load monitoring device and generates a moment control signal or a rotation control signal according to a preset processing program, the moment control signal is output to the power regulating and controlling device to regulate the input moment and the rotating speed of the knife roll, and the rotation control signal is output to the rotation regulating and controlling device to control the rotating direction and start and stop of the knife roll;
the processing program comprises: when the load signal is larger than a second threshold value, the control device generates a control signal for increasing the moment; when the load signal is smaller than a first threshold value, the control device generates a control signal for increasing the rotating speed of the knife roller; when the load signal is greater than a third threshold value, the control device judges that the knife roll is locked, and the control device controls the knife roll to sequentially execute the working procedures of stopping rotation, reversely rotating for a specified time, stopping rotation and finally rotating forwards through the rotation regulating and controlling device; wherein the third threshold is greater than the second threshold and greater than the first threshold.
9. A shredder control method according to claim 8, in which the power modulating device is an electrically proportional hydraulic motor, the load monitoring device is a pressure sensor, and the rotation modulating device is a solenoid directional valve, comprising the steps of:
s1, the pressure sensor outputs the monitored load signal of the knife roller to the control device;
s2, the control device receives a load signal of the knife roll sent by the pressure sensor and executes the action process of the electric proportional hydraulic motor firstly;
and S3, executing the action process of the electromagnetic directional valve.
10. The shredder control method according to claim 9, wherein the step S2 specifically includes: when the load signal is larger than a second threshold value, the control device generates a control signal for increasing the output torque of the electric proportional hydraulic motor; when the load signal is smaller than a first threshold value, the control device generates a control signal for increasing the rotating speed of the knife roller; the step S3 specifically includes: when the load signal is greater than a third threshold value, the control device judges that the knife roll is locked, and the control device controls the knife roll to sequentially execute the working processes of stopping rotation, reversely rotating for a specified time, stopping rotation and finally normally rotating through the valve position transition of the electromagnetic directional valve; wherein the third threshold is greater than the second threshold and greater than the first threshold.
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