CN114146828A - Centralized control device and control method for hydraulically-driven horizontal screw centrifuge - Google Patents
Centralized control device and control method for hydraulically-driven horizontal screw centrifuge Download PDFInfo
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- 230000001105 regulatory effect Effects 0.000 claims abstract description 11
- 239000003921 oil Substances 0.000 claims description 21
- 238000001514 detection method Methods 0.000 claims description 13
- 239000010720 hydraulic oil Substances 0.000 claims description 8
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- 239000000463 material Substances 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
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- 230000009471 action Effects 0.000 description 1
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- 238000004891 communication Methods 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
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- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
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- B04B13/00—Control arrangements specially designed for centrifuges; Programme control of centrifuges
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Abstract
The invention relates to a centralized control device and a control method for hydraulically driving a horizontal screw centrifuge, which relate to the technical field of horizontal screw centrifuges and comprise a controller, operating equipment, a hydraulic signal acquisition device, a centrifuge signal acquisition device, a hydraulic control speed regulation unit, a centrifuge control speed regulation unit, a host frequency converter and a hydraulic station frequency converter; the operation equipment, the hydraulic signal acquisition device, the centrifuge signal acquisition device, the hydraulic control speed regulation unit and the centrifuge control speed regulation unit are electrically connected with the controller; the centrifuge control speed regulation unit is connected with a main machine frequency converter, and the main machine frequency converter is connected with a main motor of the hydraulic drive horizontal screw centrifuge; the hydraulic control speed regulating unit is connected with a hydraulic station frequency converter, and the hydraulic station frequency converter is connected with a hydraulic pump station motor. The hydraulic drive horizontal screw centrifuge adjusting device has the advantages that automatic operation and adjustment and control can be rapidly carried out on the hydraulic drive horizontal screw centrifuge, the delivery time of products is greatly shortened, hidden troubles in operation are avoided functionally, and the on-site debugging time is greatly shortened.
Description
Technical Field
The invention relates to the technical field of horizontal screw centrifuges, in particular to a centralized control device and a control method for hydraulically driving a horizontal screw centrifuge.
Background
The horizontal screw centrifuge is a settling equipment with horizontal screw unloading and continuous operation, and its working principle is that the drum and screw can be rotated at a high speed in same direction with a certain differential speed, the material can be continuously introduced into the internal cylinder of material-conveying screw by means of feeding pipe, and accelerated and fed into the drum, and under the action of centrifugal force field the heavy solid-phase material can be deposited on the wall of drum to form a sediment layer. The conveying screw continuously pushes the deposited solid-phase substances to the conical end of the rotary drum and discharges the solid-phase substances out of the machine through the slag discharge port. The lighter liquid phase forms an inner layer liquid ring, continuously overflows from the rotary drum through an overflow port at the large end of the rotary drum, and is discharged out of the machine through a liquid discharge port. At present, the horizontal screw centrifugal machine can be roughly divided into three types of single motor drive, double motor drive and single motor single hydraulic drive.
At present, a single-motor single-hydraulic-driven horizontal screw centrifuge adopts a main motor to directly drive a rotary drum through a belt pulley, and a hydraulic pressure differential mechanism is driven by a hydraulic station to drive a screw pusher to rotate so as to realize differential rotation speed. The driving mode is convenient to control and high in sensitivity; however, the driving mode does not have the control system to automatically control the whole body, and does not have uniform standardized modules and manufacture, so that a user cannot rapidly and automatically operate and regulate the hydraulic drive horizontal screw centrifuge, the delivery and on-site debugging time of products is long, and the user is unfamiliar with the performance of equipment and generates hidden trouble on the running of the equipment by the self-matching control system.
The foregoing description is provided for general background information and is not admitted to be prior art.
Disclosure of Invention
The invention aims to provide a centralized control device and a control method for a hydraulic drive horizontal screw centrifuge, wherein the centralized control device can quickly and automatically operate and regulate the hydraulic drive horizontal screw centrifuge, can greatly shorten the delivery time of products, functionally avoids the hidden trouble of operation, and greatly shortens the debugging time on site.
The invention provides a centralized control device for hydraulically driving a horizontal screw centrifuge, which comprises a controller, operating equipment, a hydraulic signal acquisition device, a centrifuge signal acquisition device, a hydraulic control speed regulation unit, a centrifuge control speed regulation unit, a host frequency converter and a hydraulic station frequency converter, wherein the host frequency converter is connected with the hydraulic station frequency converter through a hydraulic power supply; the operating equipment, the hydraulic signal acquisition device, the centrifuge signal acquisition device, the hydraulic control speed regulation unit and the centrifuge control speed regulation unit are electrically connected with the controller; the centrifuge control speed regulation unit is connected with the host frequency converter, and the host frequency converter is connected with a main motor of the hydraulically-driven horizontal screw centrifuge; the hydraulic control speed regulating unit is connected with the hydraulic station frequency converter, and the hydraulic station frequency converter is connected with a hydraulic pump station motor; the centrifuge signal acquisition device is used for acquiring signals of the hydraulic drive horizontal screw centrifuge, and the hydraulic signal acquisition device is used for acquiring signals of a motor of the hydraulic pump station.
Furthermore, the centralized control device for the hydraulic drive horizontal decanter centrifuge further comprises a network interface unit, the network interface unit is electrically connected with the controller, and the network interface unit is further connected with a central control room.
Furthermore, the operating device comprises a touch operating screen, and a parameter display interface, a control function interface and a parameter setting interface are arranged on the touch operating screen.
Further, the parameter display interface comprises a big end bearing temperature, a small end bearing temperature, a rotating speed, a differential speed, a big end bearing vibration, a small end bearing vibration, a host machine current, a host machine frequency, a hydraulic motor current, a hydraulic motor frequency, a hydraulic oil temperature and a hydraulic torque.
Further, the control function interface comprises a regulation mode button, a manual mode button, an automatic mode button, a stop mode button, a hydraulic station start-stop button, a host start-stop button, a hydraulic frequency setting button, a host frequency setting button and a feeding permission indication button.
Further, the parameter setting interface comprises a torque exceeding N1 button, a torque exceeding N2 button, a target torque N0 button, a target differential speed button, a basic differential speed button, a maximum differential speed button, a slope calibration button, a hydraulic oil temperature threshold value button, a large-end shaft temperature threshold value button, a small-end shaft temperature threshold value button, a large-end vibration threshold value button and a small-end vibration threshold value button.
Furthermore, a hydraulic motor is installed on the hydraulic drive horizontal screw centrifuge and is connected with the hydraulic pump station motor through a sealing rotary joint.
The invention also provides a control method, which is applied to the centralized control device for the hydraulic drive horizontal screw centrifuge and comprises the following steps:
starting a control cabinet to supply power, and judging whether alarm display exists on the operation equipment; if alarm display exists, processing the fault and resetting the fault bit; if no alarm display exists, the system enters three modes of a manual control mode, an automatic operation mode and an automatic stop mode for selection;
selecting to enter a manual control mode:
the method is used for debugging, fault processing and independent manual start and stop of each device;
selecting to enter an automatic shutdown mode:
clicking a stop mode button on the motor operation equipment to enter an automatic stop control mode; the feeding permission signal is cancelled, feeding is stopped, and the system enters a stop mode; the centrifuge keeps running for 5 minutes, and the centrifuge continues to discharge mud; the operation of the main machine of the centrifuge is stopped; stopping the centrifuge main machine; the hydraulic station stops running; stopping the hydraulic station;
selecting to enter an automatic operation mode:
then clicking an automatic mode button on the motor operation equipment to enter an automatic starting control mode;
judging whether an oil temperature high alarm and an oil level low alarm exist, if so, alarming and indicating, and continuing to judge; if not, starting the hydraulic station, and operating the hydraulic station;
judging whether the pressure detection is higher than P2, if so, entering alarm and indication, and continuing to judge; if the pressure is not higher than P2, the hydraulic station is maintained to run for 60 seconds;
starting a centrifuge host, judging whether an oil level low alarm exists or not, if so, entering an alarm and indication, stopping the operation of a hydraulic station, stopping the operation of the centrifuge host, stopping the hydraulic station and stopping the centrifuge host;
if not, judging whether an oil temperature high alarm, a centrifuge large end temperature detection, a centrifuge small end temperature detection and a pressure detection are higher than P2, if so, entering an alarm and an instruction, stopping the operation of the centrifuge main machine, stopping the operation of the hydraulic station and stopping the hydraulic station;
if not, judging whether the centrifugal machine host reaches the speed, and if not, judging again;
if the speed is reached, judging that the oil temperature is high, the oil level is low, the pressure is higher than P1, the vibration of the large end of the centrifuge is detected, and the vibration of the small end of the centrifuge is detected; if the judgment is yes, alarming and indicating are carried out, the centrifuge main machine stops running, the hydraulic station stops running, and the hydraulic station stops;
if not, outputting a feeding permission signal, and enabling the system to enter a normal separation mode.
Further, the control cabinet comprises a centrifuge power cabinet and a PLC control cabinet.
The centralized control device for the hydraulic drive horizontal decanter centrifuge is connected with a hydraulic variable frequency drive device matched with a user and a quick signal cable of a variable frequency drive device of the horizontal decanter centrifuge through input and output interfaces, and the centralized control device is calibrated and set with operation parameters on site as required, so that the hydraulic drive horizontal decanter centrifuge can be quickly and automatically operated and regulated; the standardized module and the manufacture of the centralized control device can greatly shorten the delivery time of products, functionally avoid the hidden danger of equipment operation caused by the fact that a user is not familiar with the equipment performance and a self-supporting control system, greatly shorten the on-site debugging time due to the configuration of the centralized control device, facilitate product standardization, mass manufacture and production, shorten the delivery period and put the equipment into operation as soon as possible.
Drawings
Fig. 1 is a schematic structural diagram of a centralized control device for a hydraulically driven horizontal decanter centrifuge according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a parameter display interface and a control function interface of the centralized control device in fig. 1.
Fig. 3 is a schematic structural diagram of a parameter setting interface of the centralized control device in fig. 1.
Fig. 4 is a flowchart of a control method of the centralized control device in fig. 1.
The reference numerals and components referred to in the drawings are as follows:
1. controller 2, operation device 21, touch operation screen
22. Parameter display interface 221, big end bearing temperature 222 and small end bearing temperature
223. Rotational speed 224, differential speed 225, big end bearing vibration
226. Small end bearing vibration 227, host current 228, host frequency
229. Hydraulic motor current 2291, hydraulic motor frequency 2292, hydraulic oil temperature
2293. Hydraulic torque 23, control function interface 231, regulation mode button
232. Manual mode button 233, automatic mode button 234, stop mode button
235. Hydraulic station start-stop button 236, main unit start-stop button 237, hydraulic frequency setting button
238. Host frequency setting button 239, feeding permission indication button 24 and parameter setting interface
241. Torque-over-N1 button 242, torque-over-N2 button 243, and target torque N0 button
244. Target differential button 245, basic differential button 246, maximum differential button
247. Slope calibration button 248, hydraulic oil temperature threshold value button 249 and big end shaft temperature threshold value button
2491. A small end shaft temperature threshold button 2492, a large end vibration threshold button 2493 and a small end vibration threshold button
3. Hydraulic signal acquisition device 4, centrifuge signal acquisition device 5, hydraulic control speed regulating unit
6. Centrifuge control speed regulating unit 7, host frequency converter 8 and hydraulic station frequency converter
9. Network interface unit 100, hydraulic drive horizontal screw centrifuge 110, main motor
120. Hydraulic motor 130, sealed rotary joint 200, central control room
300. Hydraulic pump station motor
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
The terms first, second, third, fourth and the like in the description and in the claims of the present invention are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.
Example 1
Fig. 1 is a schematic structural diagram of a centralized control device for a hydraulically driven horizontal decanter centrifuge according to an embodiment of the present invention. Referring to fig. 1, the centralized control device for hydraulically driving a horizontal decanter centrifuge provided in the embodiment of the present invention includes a controller 1, an operating device 2, a hydraulic signal acquisition device 3, a centrifuge signal acquisition device 4, a hydraulic control speed regulation unit 5, a centrifuge control speed regulation unit 6, a host frequency converter 7, and a hydraulic station frequency converter 8; the operation equipment 2, the hydraulic signal acquisition device 3, the centrifuge signal acquisition device 4, the hydraulic control speed regulation unit 5 and the centrifuge control speed regulation unit 6 are electrically connected with the controller 1; the centrifuge control speed regulating unit 6 is connected with a main machine frequency converter 7, and the main machine frequency converter 7 is connected with a main motor 110 of the hydraulic drive horizontal decanter centrifuge 100; the hydraulic control speed regulating unit 5 is connected with a hydraulic station frequency converter 8, and the hydraulic station frequency converter 8 is connected with a hydraulic pump station motor 300; the centrifuge signal acquisition device 4 is used for acquiring signals of the hydraulically-driven horizontal decanter centrifuge 100, and the hydraulic signal acquisition device 3 is used for acquiring signals of a hydraulic pump station motor 300; the hydraulic drive horizontal decanter centrifuge 100 is provided with a hydraulic motor 120, and the hydraulic motor 120 is connected with a hydraulic pump station motor 300 through a sealing rotary joint 130.
Specifically, the controller 1 is responsible for implementing operation logic, operation regulation, signal access and output of each functional module, and interlocking function of the system; the hydraulic unit signal acquisition device has the main functions: the hydraulic signal acquisition device 3 is responsible for acquiring and converting signals of a motor 300 of a hydraulic pump station, and is connected with an oil temperature transmitter (high temperature alarm), an oil level sensor (low liquid level alarm), an oil filter sensor (differential pressure alarm) and a pressure transmitter (pressure detection) of the hydraulic pump station; the centrifuge signal acquisition device 4 is responsible for acquiring and converting signals of the hydraulically driven horizontal decanter centrifuge 100, and is connected with a large-end vibration transmitter (vibration alarm), a small-end vibration transmitter (vibration alarm), a large-end temperature sensor (temperature high alarm), a small-end temperature sensor (temperature high alarm), a rotating speed sensor and a differential sensor; the hydraulic control speed regulating unit 5 is responsible for operation and fault feedback of the frequency converter 8 of the access hydraulic station; speed and frequency analog quantity feedback; sending out a control command and a speed adjusting command; the centrifugal machine control speed regulation unit 6 is responsible for operation and fault feedback of the frequency converter 7 of the access host; speed and frequency analog quantity feedback; and sending out a control command and a speed adjusting command.
It should be noted that the centralized control device of the present invention is connected with the fast signal cable of the host frequency converter 7 and the hydraulic station frequency converter 8 which are matched with the user through the input and output interfaces, and the centralized control device is completed with parameter calibration and operation parameter setting on site as required, so that the hydraulic drive horizontal decanter centrifuge 100 can be operated and regulated automatically; the standardized module and the manufacture of the centralized control device can greatly shorten the delivery time of products, avoid hidden danger of equipment operation caused by the fact that users are unfamiliar with equipment performance and are matched with a control system by themselves in terms of functions, greatly shorten the debugging time on site due to the configuration of the centralized control device, facilitate product standardization, mass manufacture and production, shorten the delivery period and put the equipment into operation as soon as possible.
Referring to fig. 1 again, the centralized control device for a hydraulically driven horizontal decanter centrifuge according to the embodiment of the present invention further includes a network interface unit 9, the network interface unit 9 is electrically connected to the controller 1, and the network interface unit 9 is further connected to the central control room 200. It should be noted that, the system operates reliably by communicating with the central control room 200, receiving the command from the central control room 200 and outputting the interlock command of the peripheral devices of the centrifuge through communication.
Fig. 2 is a schematic structural diagram of a parameter display interface and a control function interface of the central control device in fig. 1, and fig. 3 is a schematic structural diagram of a parameter setting interface of the central control device in fig. 1. Referring to fig. 2 and fig. 3, the operating device 2 according to the embodiment of the present invention includes a touch operating screen 21, and a parameter display interface 22, a control function interface 23, and a parameter setting interface 24 are disposed on the touch operating screen 21.
As shown in fig. 2, the parameter display interface 22 includes a big end bearing temperature 221, a small end bearing temperature 222, a rotation speed 223, a differential 224, a big end bearing vibration 225, a small end bearing vibration 226, a main machine current 227, a main machine frequency 228, a hydraulic motor current 229, a hydraulic motor frequency 2291, a hydraulic oil temperature 2292, and a hydraulic torque 2293. The control function interface 23 includes a control mode button 231, a manual mode button 232, an automatic mode button 233, a stop mode button 234, a hydraulic station start-stop button 235, a host start-stop button 236, a hydraulic frequency setting button 237, a host frequency setting button 238, and a feed enable indication button 239.
As shown in fig. 3, the parameter setting interface 24 includes a torque over N1 button 241, a torque over N2 button 242, a target torque N0 button 243, a target differential button 244, a base differential button 245, a maximum differential button 246, a slope calibration button 247, a hydraulic oil temperature threshold button 248, a big end shaft temperature threshold button 249, a small end shaft temperature threshold button 2491, a big end vibration threshold button 2492, and a small end vibration threshold button 2493.
Fig. 4 is a flowchart of a control method of the centralized control device in fig. 1. Referring to fig. 4, an embodiment of the present invention further provides a control method applied to the centralized control device for hydraulically driving a horizontal decanter centrifuge, including:
starting a control cabinet to supply power (the control cabinet comprises a centrifuge power cabinet and a PLC control cabinet), and judging whether alarm display exists on the operation equipment; if alarm display exists, processing the fault and resetting the fault bit; if no alarm display exists, the system enters three modes of a manual control mode, an automatic operation mode and an automatic stop mode for selection;
selecting to enter a manual control mode:
the method is used for debugging, fault processing and independent manual start and stop of each device;
selecting to enter an automatic shutdown mode:
clicking a stop mode button on the motor operation equipment to enter an automatic stop control mode; the feeding permission signal is cancelled, feeding is stopped, and the system enters a stop mode; the centrifuge keeps running for 5 minutes, and the centrifuge continues to discharge mud; the operation of the main machine of the centrifuge is stopped; stopping the centrifuge main machine; the hydraulic station stops running; stopping the hydraulic station;
selecting to enter an automatic operation mode:
then clicking an automatic mode button on the motor operation equipment to enter an automatic starting control mode;
judging whether an oil temperature high alarm and an oil level low alarm exist, if so, alarming and indicating, and continuing to judge; if not, starting the hydraulic station, and operating the hydraulic station;
judging whether the pressure detection is higher than P2, if so, entering alarm and indication, and continuing to judge; if the pressure is not higher than P2, the hydraulic station is maintained to run for 60 seconds;
starting a centrifuge host, judging whether an oil level low alarm exists or not, if so, entering an alarm and indication, stopping the operation of a hydraulic station, stopping the operation of the centrifuge host, stopping the hydraulic station and stopping the centrifuge host;
if not, judging whether an oil temperature high alarm, a centrifuge large end temperature detection, a centrifuge small end temperature detection and a pressure detection are higher than P2, if so, entering an alarm and an instruction, stopping the operation of the centrifuge main machine, stopping the operation of the hydraulic station and stopping the hydraulic station;
if not, judging whether the centrifugal machine host reaches the speed, and if not, judging again;
if the speed is reached, judging that the oil temperature is high, the oil level is low, the pressure is higher than P1, the vibration of the large end of the centrifuge is detected, and the vibration of the small end of the centrifuge is detected; if the judgment is yes, alarming and indicating are carried out, the centrifuge main machine stops running, the hydraulic station stops running, and the hydraulic station stops;
if not, outputting a feeding permission signal, and enabling the system to enter a normal separation mode.
It should be noted that, according to the automatic control logic, the corresponding devices are sequentially started. After the centrifugal dehydration system enters a normal operation state, in a normal operation process, the system can adjust the differential speed according to the change of the actual hydraulic torque so as to ensure the normal operation of the machine and the dryness of discharged materials. The torque of the hydraulic station has three thresholds P0, P1 and P2, and when the torque is greater than P0, the differential speed is required to be increased, namely the operation frequency (the highest 50Hz) of the hydraulic station is increased, and meanwhile, the frequency of a feeding pump is reduced, and the feeding amount is reduced. Due to the increase of the differential speed, the stay time of the materials in the dewatering machine is shortened, the torque automatically drops, and when the torque is lower than P0 and is lower by a return difference value, the running speed of the hydraulic station is restored to the original frequency. If the torque is larger than P1, the differential speed is increased and the feeding pump and the dosing pump are closed, and if the torque is reduced to be lower than P0 and is lower by one return difference value after the differential speed is increased, the normal differential speed and the feeding are recovered. And when the torque is larger than P2, the machine is automatically stopped (not cleaned).
Based on the above description, the present invention has the following advantages:
1. the centralized control device for the hydraulically driven horizontal decanter centrifuge is connected with a quick signal cable of a host frequency converter 7 and a hydraulic station frequency converter 8 matched with a user through input and output interfaces, and the centralized control device is calibrated and set with operation parameters on site as required, so that the hydraulically driven horizontal decanter centrifuge 100 can be quickly and automatically operated and regulated; the standardized module and the manufacture of the centralized control device can greatly shorten the delivery time of products, avoid hidden danger of equipment operation caused by the fact that users are unfamiliar with equipment performance and are matched with a control system by themselves in terms of functions, greatly shorten the debugging time on site due to the configuration of the centralized control device, facilitate product standardization, mass manufacture and production, shorten the delivery period and put the equipment into operation as soon as possible.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (9)
1. A centralized control device for a hydraulic drive horizontal screw centrifuge is characterized by comprising a controller (1), an operating device (2), a hydraulic signal acquisition device (3), a centrifuge signal acquisition device (4), a hydraulic control speed regulation unit (5), a centrifuge control speed regulation unit (6), a host frequency converter (7) and a hydraulic station frequency converter (8);
the operating equipment (2), the hydraulic signal acquisition device (3), the centrifuge signal acquisition device (4), the hydraulic control speed regulation unit (5) and the centrifuge control speed regulation unit (6) are electrically connected with the controller (1);
the centrifugal machine control speed regulation unit (6) is connected with the main machine frequency converter (7), and the main machine frequency converter (7) is connected with a main motor (110) of the hydraulic drive horizontal screw centrifugal machine (100); the hydraulic control speed regulating unit (5) is connected with the hydraulic station frequency converter (8), and the hydraulic station frequency converter (8) is connected with a hydraulic pump station motor (300);
the centrifuge signal acquisition device (4) is used for acquiring signals of the hydraulic drive horizontal screw centrifuge (100), and the hydraulic signal acquisition device (3) is used for acquiring signals of a hydraulic pump station motor (300).
2. A central control arrangement for a hydraulically driven decanter centrifuge according to claim 1, characterized in that it further comprises a network interface unit (9), said network interface unit (9) being electrically connected to said controller (1), said network interface unit (9) being further connected to a central control room (200).
3. A centralized control apparatus for a hydraulically driven decanter centrifuge according to claim 1, characterized in that the operating device (2) comprises a touch operating screen (21), and a parameter display interface (22), a control function interface (23) and a parameter setting interface (24) are arranged on the touch operating screen (21).
4. A centralized control apparatus for a hydraulically driven decanter centrifuge as recited in claim 3, characterized in that said parameter display interface (22) comprises big end bearing temperature (221), small end bearing temperature (222), rotational speed (223), differential speed (224), big end bearing vibration (225), small end bearing vibration (226), main machine current (227), main machine frequency (228), hydraulic motor current (229), hydraulic motor frequency (2291), hydraulic oil temperature (2292), hydraulic torque (2293).
5. A centralized control apparatus for a hydraulically driven decanter centrifuge according to claim 3, characterized in that said control function interface (23) comprises a regulation mode button (231), a manual mode button (232), an automatic mode button (233), a stop mode button (234), a hydraulic station start-stop button (235), a main machine start-stop button (236), a hydraulic frequency setting button (237), a main machine frequency setting button (238), a feed allowance indication button (239).
6. A centralized control apparatus for a hydraulically driven decanter centrifuge as recited in claim 3, characterized in that the parameter setting interface (24) comprises a torque over N1 button (241), a torque over N2 button (242), a target torque N0 button (243), a target differential button (244), a base differential button (245), a maximum differential button (246), a slope calibration button (247), a hydraulic oil temperature threshold button (248), a large end shaft temperature threshold button (249), a small end shaft temperature threshold button (2491), a large end vibration threshold button (2492), a small end vibration threshold button (2493).
7. A centralized control apparatus for a hydraulically driven decanter centrifuge according to claim 1, characterized in that a hydraulic motor (120) is mounted on said hydraulically driven decanter centrifuge (100), said hydraulic motor (120) being connected to said hydraulic pump station motor (300) by means of a sealed swivel joint (130).
8. A control method applied to the centralized control device for the hydraulically driven decanter centrifuge as recited in claim 1, characterized in that it comprises:
starting a control cabinet to supply power, and judging whether alarm display exists on the operation equipment; if alarm display exists, processing the fault and resetting the fault bit; if no alarm display exists, the system enters three modes of a manual control mode, an automatic operation mode and an automatic stop mode for selection;
selecting to enter a manual control mode:
the method is used for debugging, fault processing and independent manual start and stop of each device;
selecting to enter an automatic shutdown mode:
clicking a stop mode button on the motor operation equipment to enter an automatic stop control mode; the feeding permission signal is cancelled, feeding is stopped, and the system enters a stop mode; the centrifuge keeps running for 5 minutes, and the centrifuge continues to discharge mud; the operation of the main machine of the centrifuge is stopped; stopping the centrifuge main machine; the hydraulic station stops running; stopping the hydraulic station;
selecting to enter an automatic operation mode:
then clicking an automatic mode button on the motor operation equipment to enter an automatic starting control mode;
judging whether an oil temperature high alarm and an oil level low alarm exist, if so, alarming and indicating, and continuing to judge; if not, starting the hydraulic station, and operating the hydraulic station;
judging whether the pressure detection is higher than P2, if so, entering alarm and indication, and continuing to judge; if the pressure is not higher than P2, the hydraulic station is maintained to run for 60 seconds;
starting a centrifuge host, judging whether an oil level low alarm exists or not, if so, entering an alarm and indication, stopping the operation of a hydraulic station, stopping the operation of the centrifuge host, stopping the hydraulic station and stopping the centrifuge host;
if not, judging whether an oil temperature high alarm, a centrifuge large end temperature detection, a centrifuge small end temperature detection and a pressure detection are higher than P2, if so, entering an alarm and an instruction, stopping the operation of the centrifuge main machine, stopping the operation of the hydraulic station and stopping the hydraulic station;
if not, judging whether the centrifugal machine host reaches the speed, and if not, judging again;
if the speed is reached, judging that the oil temperature is high, the oil level is low, the pressure is higher than P1, the vibration of the large end of the centrifuge is detected, and the vibration of the small end of the centrifuge is detected; if the judgment is yes, alarming and indicating are carried out, the centrifuge main machine stops running, the hydraulic station stops running, and the hydraulic station stops;
if not, outputting a feeding permission signal, and enabling the system to enter a normal separation mode.
9. The control method of claim 7, wherein the control cabinets comprise a centrifuge power cabinet and a PLC control cabinet.
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| CN115672576A (en) * | 2022-11-14 | 2023-02-03 | 江苏东邦机械有限公司 | Double closed-loop operation control system of horizontal screw centrifuge based on fuzzy self-adaptation |
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