CN114146828B - Centralized control device and control method for hydraulic drive horizontal decanter centrifuge - Google Patents
Centralized control device and control method for hydraulic drive horizontal decanter centrifuge Download PDFInfo
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- CN114146828B CN114146828B CN202111433603.7A CN202111433603A CN114146828B CN 114146828 B CN114146828 B CN 114146828B CN 202111433603 A CN202111433603 A CN 202111433603A CN 114146828 B CN114146828 B CN 114146828B
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- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000001514 detection method Methods 0.000 claims description 13
- 238000000926 separation method Methods 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 abstract description 8
- 239000003921 oil Substances 0.000 description 15
- 238000004519 manufacturing process Methods 0.000 description 10
- 238000010586 diagram Methods 0.000 description 6
- 239000010720 hydraulic oil Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 239000007788 liquid Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000007790 solid phase Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- 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 a hydraulic drive decanter centrifuge, and relates to the technical field of decanter centrifuges, wherein the centralized control device comprises a controller, operation 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 centrifugal machine signal acquisition device, the hydraulic control speed regulation unit and the centrifugal machine control speed regulation unit are electrically connected with the controller; the centrifuge control speed regulating unit is connected with a main machine frequency converter, and the main machine frequency converter is connected with a main motor of the hydraulic driving horizontal decanter centrifuge; the hydraulic control speed regulation 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 driving horizontal decanter centrifuge has the advantages that the hydraulic driving horizontal decanter centrifuge can be automatically operated and regulated and controlled rapidly, the delivery time of products is greatly compressed, the hidden danger of operation is avoided functionally, and the on-site debugging time is greatly shortened.
Description
Technical Field
The invention relates to the technical field of decanter centrifuges, in particular to a centralized control device and a control method for a hydraulic drive decanter centrifuge.
Background
The horizontal spiral centrifugal machine is a horizontal spiral unloading and continuously operating sedimentation device, and the working principle of the horizontal spiral centrifugal machine is that a rotary drum and a spiral rotate at a certain differential speed in the same direction and high speed, materials are continuously introduced into an inner cylinder of a material conveying spiral through a feeding pipe and enter the rotary drum after being accelerated, and heavier solid phase matters are deposited on the wall of the rotary drum to form a sediment layer under the action of a centrifugal force field. The solid phase matter deposited is continuously pushed to the cone end of the rotary drum by the material conveying screw and discharged out of the machine through the slag discharging port. The lighter liquid phase forms an inner liquid ring, continuously overflows the rotary drum through the overflow port at the large end of the rotary drum, and is discharged out of the machine through the liquid discharge port. At present, the horizontal decanter centrifuge can be roughly divided into three types, namely single motor drive, double motor drive and single motor single hydraulic drive.
At present, a single-motor single-hydraulic-drive horizontal decanter centrifuge adopts a main motor to directly drive a rotary drum through a belt pulley, and a hydraulic differential mechanism is driven by a hydraulic station, so that the hydraulic differential mechanism drives a spiral pusher to rotate to realize differential rotation speed. The driving mode is convenient to control and has higher sensitivity; however, the driving mode does not have a control system for automatically controlling the whole body and has no unified standardized module and manufacture, so that a user cannot quickly perform automatic operation and regulation on the hydraulic driving horizontal decanter centrifuge, the delivery of products and the on-site debugging time are long, and the user is unfamiliar with the self-supporting control system for equipment performance to generate hidden troubles for equipment operation.
The foregoing description is provided for general background information and does not necessarily constitute prior art.
Disclosure of Invention
The invention aims to provide a centralized control device and a control method for a hydraulic-driven decanter centrifuge, wherein the centralized control device can be used for rapidly carrying out automatic operation and regulation on the hydraulic-driven decanter centrifuge, greatly compressing the delivery time of products, avoiding the hidden trouble of operation in function and greatly shortening the on-site debugging time.
The invention provides a centralized control device for a hydraulic-driven horizontal decanter centrifuge, which comprises a controller, operation 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; the operation equipment, the hydraulic signal acquisition device, the centrifugal machine signal acquisition device, the hydraulic control speed regulation unit and the centrifugal machine control speed regulation unit are electrically connected with the controller; the centrifugal machine control speed regulation unit is connected with the main machine frequency converter, and the main machine frequency converter is connected with a main motor of the hydraulic drive horizontal decanter centrifuge; the hydraulic control speed regulation unit is connected with the hydraulic station frequency converter, and the hydraulic station frequency converter is connected with the hydraulic pump station motor; the centrifugal machine signal acquisition device is used for acquiring signals of the hydraulic-driven horizontal decanter centrifugal machine, and the hydraulic signal acquisition device is used for acquiring motor signals of the hydraulic pump station.
Further, the centralized control device for the hydraulic-driven decanter centrifuge further comprises a network interface unit, wherein the network interface unit is electrically connected with the controller, and the network interface unit is further connected with the central control room.
Further, the operation device comprises a touch operation screen, and a parameter display interface, a control function interface and a parameter setting interface are arranged on the touch operation screen.
Further, the parameter display interface comprises a big end bearing temperature, a small end bearing temperature, a rotating speed, a differential speed, big end bearing vibration, small end bearing vibration, a host current, a host 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 and control 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 button, a basic differential button, a maximum differential button, a slope calibration button, a hydraulic oil temperature threshold button, a large end shaft temperature threshold button, a small end shaft temperature threshold button, a large end vibration threshold button and a small end vibration threshold button.
Further, a hydraulic motor is arranged on the hydraulic driving horizontal decanter centrifuge, and the hydraulic motor 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-driven horizontal decanter centrifuge and comprises the following steps:
Starting a control cabinet to supply power, and judging whether an alarm display exists on the operation equipment; if the alarm display exists, processing the fault and resetting the fault position; if no alarm display exists, three mode selections of a manual control mode, an automatic operation mode and an automatic stop mode are entered;
selecting to enter a manual control mode:
the device 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 withdrawn, feeding is stopped, and the system enters a stopping mode; the centrifuge keeps running for 5 minutes, and the centrifuge continues to discharge mud; stopping the operation of the centrifuge host; stopping the centrifuge host; stopping the operation of the hydraulic station; stopping the hydraulic station;
selecting to enter an automatic operation mode:
Clicking an automatic mode button on the motor operation equipment to enter an automatic starting control mode;
Judging whether oil temperature high alarm and oil level low alarm exist or not, if so, entering an alarm and an instruction, 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 an alarm and an instruction, and continuing to judge; if the pressure is not higher than P2, maintaining the hydraulic station to operate for 60 seconds;
starting a centrifuge host, judging whether the oil level is low or not, if yes, entering an alarm and indicating, 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 the oil temperature is high, the temperature of the big end of the centrifugal machine is detected, the temperature of the small end of the centrifugal machine is detected, and the pressure is detected to be higher than P2, if so, entering an alarm and an instruction, stopping the operation of a main machine of the centrifugal machine, stopping the operation of a hydraulic station, and stopping the hydraulic station;
if not, entering a centrifuge host to judge whether the speed is reached, and if not, judging again;
If the speed is reached, the judgment of oil temperature high alarm, oil level low alarm, pressure detection higher than P1, centrifuge large end vibration detection and centrifuge small end vibration detection is entered; if yes, alarming and indicating are carried out, the centrifuge main machine stops running, the hydraulic station stops running, and the hydraulic station stops running;
if not, outputting a feeding permission signal, and entering a normal separation mode by the system.
Further, the control cabinet comprises a centrifugal machine power cabinet and a PLC control cabinet.
The centralized control device for the hydraulic driven decanter centrifuge is connected with a rapid signal cable of a hydraulic variable frequency driving device matched with a user and a variable frequency driving device of the decanter centrifuge through an input interface and an output interface, and parameter calibration and operation parameter setting of the centralized control device are finished on site as required, so that the hydraulic driven decanter centrifuge can be rapidly operated and regulated; the standardized module and the manufacture of the centralized control device can greatly compress the delivery time of products, functionally avoid hidden danger of running the equipment caused by unfamiliar self-supporting control system of the performance of the equipment by a user, greatly shorten the on-site debugging time by the configuration of the centralized control device, facilitate the standardization of the products, batch 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 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.
Reference numerals and components referred to in the drawings are as follows:
1. Controller 2, operation device 21, and touch panel
22. Parameter display interface 221, big end bearing temperature 222, small end bearing temperature
223. Rotational speed 224, differential 225, large end bearing vibration
226. Small end bearing vibration 227, host current 228, host frequency
229. Hydraulic motor current 2291, hydraulic motor frequency 2292, and hydraulic oil temperature
2293. Hydraulic torque 23, control function interface 231, regulation mode button
232. Manual mode button 233, automatic mode button 234, and stop mode button
235. Hydraulic station start-stop button 236, main machine start-stop button 237, and hydraulic frequency setting button
238. Host frequency setting button 239, feed enable indication button 24, parameter setting interface
241. Torque supern 1 button 242, torque supern 2 button 243, target torque N0 button
244. Target differential button 245, base differential button 246, maximum differential button
247. Slope calibration button 248, hydraulic oil temperature threshold button 249, large end shaft temperature threshold button
2491. Small-end shaft temperature threshold button 2492, large-end vibration threshold button 2493 and small-end vibration threshold button
3. Hydraulic signal acquisition device 4, centrifugal machine signal acquisition device 5 and hydraulic control speed regulation unit
6. Centrifuge control speed regulating unit 7, main machine frequency converter 8 and hydraulic station frequency converter
9. Network interface unit 100, hydraulically driven decanter centrifuge 110, and main motor
120. Hydraulic motor 130, sealed rotary joint 200, central control room
300. Motor of hydraulic pump station
Detailed Description
The following describes in further detail the embodiments of the present invention with reference to the drawings and examples. The following examples are illustrative of the invention and 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, 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 decanter centrifuge according to an embodiment of the present invention. Referring to fig. 1, a centralized control device for a hydraulic-driven decanter centrifuge provided by an 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 device 2, the hydraulic signal acquisition device 3, the centrifugal machine signal acquisition device 4, the hydraulic control speed regulation unit 5 and the centrifugal machine 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 regulation unit 5 is connected with the hydraulic station frequency converter 8, and the hydraulic station frequency converter 8 is connected with the hydraulic pump station motor 300; the centrifuge signal acquisition device 4 is used for acquiring signals of the hydraulic-driven decanter centrifuge 100, and the hydraulic signal acquisition device 3 is used for acquiring signals of the hydraulic pump station motor 300; the hydraulic motor 120 is installed on the hydraulic-driven decanter centrifuge 100, and the hydraulic motor 120 is connected with the hydraulic pump station motor 300 through the sealing rotary joint 130.
Specifically, the controller 1 is responsible for implementing operation logic, controlling operation, accessing signals of all functional modules, outputting signals and interlocking functions of the system; the hydraulic unit signal acquisition device has the main functions of: the hydraulic signal acquisition device 3 is responsible for acquisition and conversion of signals of the motor 300 of the hydraulic pump station, is connected to an oil temperature transmitter (temperature high alarm) of the hydraulic station, an oil level sensor (liquid level low alarm), an oil filter sensor (pressure difference alarm) and a pressure transmitter (pressure detection); the centrifuge signal acquisition device 4 is responsible for acquisition and conversion of signals of the hydraulic driving 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 regulation unit 5 is responsible for operation and fault feedback of the access hydraulic station frequency converter 8; speed and frequency analog quantity feedback; issuing a control command and a speed adjustment command; the centrifuge control speed regulating unit 6 is in charge of operation and fault feedback of the access host frequency converter 7; speed and frequency analog quantity feedback; control commands and speed adjustment commands are issued.
The centralized control device is connected with a host frequency converter 7 and a quick signal cable of a hydraulic station frequency converter 8 matched with a user through input and output interfaces, and parameter calibration and operation parameter setting of the centralized control device are finished on site as required, so that the hydraulic-driven horizontal decanter centrifuge 100 can be automatically operated and regulated and controlled quickly; the standardized module and the manufacture of the centralized control device can greatly compress the delivery time of products, and functionally avoid the hidden trouble that the user is unfamiliar with the self-supporting control system to the performance of the equipment to generate the operation of the equipment, the configuration of the centralized control device can also greatly shorten the on-site debugging time, the standardized, batch manufacture and production of the products are facilitated, the delivery period is shortened, and the equipment is put into operation as soon as possible.
Referring to fig. 1 again, the centralized control device for a hydraulically driven decanter centrifuge according to the embodiment of the present invention further includes a network interface unit 9, where 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. By communicating with the central control room 200, the system can operate reliably by receiving the command from the central control room 200 and outputting the interlocking command from the peripheral equipment of the centrifuge.
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, and fig. 3 is a schematic structural diagram of a parameter setting interface of the centralized control device in fig. 1. Referring to fig. 2 and 3, an operation device 2 provided in an embodiment of the present invention includes a touch operation screen 21, and a parameter display interface 22, a control function interface 23, and a parameter setting interface 24 are disposed on the touch operation screen 21.
As shown in fig. 2, the parameter display interface 22 includes a large end bearing temperature 221, a small end bearing temperature 222, a rotational speed 223, a differential 224, a large 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 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 master start-stop button 236, a hydraulic frequency setting button 237, a master frequency setting button 238, and a feed permission indication button 239.
As shown in fig. 3, the parameter setting interface 24 includes a torque super N1 button 241, a torque super 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, 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, the embodiment of the invention further provides a control method applied to the centralized control device for a hydraulic driven decanter centrifuge, which includes:
starting a control cabinet to supply power (the control cabinet comprises a centrifugal machine power cabinet and a PLC control cabinet), and judging whether alarm display exists on the operation equipment or not; if the alarm display exists, processing the fault and resetting the fault position; if no alarm display exists, three mode selections of a manual control mode, an automatic operation mode and an automatic stop mode are entered;
selecting to enter a manual control mode:
the device 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 withdrawn, feeding is stopped, and the system enters a stopping mode; the centrifuge keeps running for 5 minutes, and the centrifuge continues to discharge mud; stopping the operation of the centrifuge host; stopping the centrifuge host; stopping the operation of the hydraulic station; stopping the hydraulic station;
selecting to enter an automatic operation mode:
Clicking an automatic mode button on the motor operation equipment to enter an automatic starting control mode;
Judging whether oil temperature high alarm and oil level low alarm exist or not, if so, entering an alarm and an instruction, 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 an alarm and an instruction, and continuing to judge; if the pressure is not higher than P2, maintaining the hydraulic station to operate for 60 seconds;
starting a centrifuge host, judging whether the oil level is low or not, if yes, entering an alarm and indicating, 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 the oil temperature is high, the temperature of the big end of the centrifugal machine is detected, the temperature of the small end of the centrifugal machine is detected, and the pressure is detected to be higher than P2, if so, entering an alarm and an instruction, stopping the operation of a main machine of the centrifugal machine, stopping the operation of a hydraulic station, and stopping the hydraulic station;
if not, entering a centrifuge host to judge whether the speed is reached, and if not, judging again;
If the speed is reached, the judgment of oil temperature high alarm, oil level low alarm, pressure detection higher than P1, centrifuge large end vibration detection and centrifuge small end vibration detection is entered; if yes, alarming and indicating are carried out, the centrifuge main machine stops running, the hydraulic station stops running, and the hydraulic station stops running;
if not, outputting a feeding permission signal, and entering a normal separation mode by the system.
It should be noted that, according to the automatic control logic, the corresponding devices are started in turn. After the centrifugal dewatering system enters a normal running state, in the normal running process, the system can adjust the differential speed according to the change of the actual hydraulic torque so as to ensure the normal running of the machine and the dryness of the discharged materials. The torque of the hydraulic station has three thresholds of P0, P1 and P2, and when the torque is larger than P0, the differential speed is required to be increased, namely the operation frequency (50 Hz at maximum) of the hydraulic station is increased, and meanwhile, the frequency of a feed pump is reduced, so that the feed amount is reduced. Due to the increase of the differential speed, the stay time of the materials in the dehydrator is shortened, the torque is automatically reduced, and when the torque is lower than P0 and is lower by one return difference value, the operation speed of the hydraulic station is restored to the original frequency. If the torque is larger than P1, the feeding pump and the dosing pump are turned off while the differential speed is increased, and if the torque is reduced to be below P0 and is lower by one return differential value after the measure is taken, the normal differential speed and feeding are recovered. And when the torque is larger than P2, the machine is automatically stopped (not cleaned).
Based on the above description, the invention has the advantages that:
1. The centralized control device for the hydraulic-driven horizontal decanter centrifuge provided by the invention is connected with the host frequency converter 7 and the quick signal cable of the hydraulic station frequency converter 8 matched with a user through the input and output interfaces, and the centralized control device is used for carrying out parameter calibration and operation parameter setting on site as required, so that the hydraulic-driven horizontal decanter centrifuge 100 can be automatically operated and regulated and controlled quickly; the standardized module and the manufacture of the centralized control device can greatly compress the delivery time of products, and functionally avoid the hidden trouble that the user is unfamiliar with the self-supporting control system to the performance of the equipment to generate the operation of the equipment, the configuration of the centralized control device can also greatly shorten the on-site debugging time, the standardized, batch manufacture and production of the products are facilitated, the delivery period is shortened, and the equipment is put into operation as soon as possible.
The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (2)
1. The control method is applied to a centralized control device of a hydraulic-driven horizontal decanter centrifuge, and the centralized control device comprises a controller (1), operation equipment (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 centrifugal machine signal acquisition device (4), the hydraulic control speed regulation unit (5) and the centrifugal machine 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 decanter centrifuge (100); the hydraulic control speed regulation unit (5) is connected with the hydraulic station frequency converter (8), and the hydraulic station frequency converter (8) is connected with the hydraulic pump station motor (300);
The centrifugal machine signal acquisition device (4) is used for acquiring signals of the hydraulic-driven decanter centrifugal machine (100), and the hydraulic signal acquisition device (3) is used for acquiring signals of the hydraulic pump station motor (300);
the control method is characterized by comprising the following steps:
Starting a control cabinet to supply power, and judging whether an alarm display exists on the operation equipment; if the alarm display exists, processing the fault and resetting the fault position; if no alarm display exists, three mode selections of a manual control mode, an automatic operation mode and an automatic stop mode are entered;
selecting to enter a manual control mode:
the device 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 withdrawn, feeding is stopped, and the system enters a stopping mode; the centrifuge keeps running for 5 minutes, and the centrifuge continues to discharge mud; stopping the operation of the centrifuge host; stopping the centrifuge host; stopping the operation of the hydraulic station; stopping the hydraulic station;
selecting to enter an automatic operation mode:
Clicking an automatic mode button on the motor operation equipment to enter an automatic starting control mode;
Judging whether oil temperature high alarm and oil level low alarm exist or not, if so, entering an alarm and an instruction, 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 an alarm and an instruction, and continuing to judge; if the pressure is not higher than P2, maintaining the hydraulic station to operate for 60 seconds;
starting a centrifuge host, judging whether the oil level is low or not, if yes, entering an alarm and indicating, 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 the oil temperature is high, the temperature of the big end of the centrifugal machine is detected, the temperature of the small end of the centrifugal machine is detected, and the pressure is detected to be higher than P2, if so, entering an alarm and an instruction, stopping the operation of a main machine of the centrifugal machine, stopping the operation of a hydraulic station, and stopping the hydraulic station;
if not, entering a centrifuge host to judge whether the speed is reached, and if not, judging again;
If the speed is reached, the judgment of oil temperature high alarm, oil level low alarm, pressure detection higher than P1, centrifuge large end vibration detection and centrifuge small end vibration detection is entered; if yes, alarming and indicating are carried out, the centrifuge main machine stops running, the hydraulic station stops running, and the hydraulic station stops running;
if not, outputting a feeding permission signal, and entering a normal separation mode by the system.
2. The control method of claim 1, wherein the control cabinet comprises a centrifuge power cabinet and a PLC control cabinet.
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201500592U (en) * | 2009-08-25 | 2010-06-09 | 上海市离心机械研究所有限公司 | Hydraulic device used for horizontal decanter centrifuge |
| CN201959866U (en) * | 2010-08-20 | 2011-09-07 | 上海市离心机械研究所有限公司 | Hydraulic differential control device of centrifugal machine |
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