CN203695235U - Automatic control device of centrifugal dehydrator - Google Patents
Automatic control device of centrifugal dehydrator Download PDFInfo
- Publication number
- CN203695235U CN203695235U CN201320863373.2U CN201320863373U CN203695235U CN 203695235 U CN203695235 U CN 203695235U CN 201320863373 U CN201320863373 U CN 201320863373U CN 203695235 U CN203695235 U CN 203695235U
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- CN
- China
- Prior art keywords
- plc
- frequency converter
- control device
- centrifugal dehydrator
- automatic control
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- Expired - Lifetime
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- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000010354 integration Effects 0.000 abstract description 2
- 230000004069 differentiation Effects 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 5
- 230000006870 function Effects 0.000 description 5
- 230000004224 protection Effects 0.000 description 5
- 230000001105 regulatory effect Effects 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 230000018044 dehydration Effects 0.000 description 4
- 238000006297 dehydration reaction Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000000605 extraction Methods 0.000 description 3
- 230000009711 regulatory function Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 230000008676 import Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Abstract
The utility model relates to an automatic control device of a centrifugal dehydrator. The automatic control device comprises a PLC (Programmable Logic Controller) for PID (Proportion Integration and Differentiation) adjustment, and a frequency converter for respectively driving a rotary drum and a spiral motor is arranged on the centrifugal dehydrator, wherein the frequency converter is used for transmitting a real-time torque value of the spiral motor to the PLC, and an adjusting current output from the PLC for PID adjustment is connected with the frequency converter of the spiral motor so as to realize stepless speed adjustment of the spiral motor. The automatic control device has the beneficial effect that the adjusting current output from the PLC for PID adjustment is connected with the frequency converter of the spiral motor when the automatic control device operators normally, and thus wireless speed adjustment of the spiral motor of the centrifugal dehydrator can be realized.
Description
Technical field
The enterprise's centrifugal dewatering of sludge control system that is applicable to municipal administration, chemical industry, power plant that relates to of the present utility model.
Background technology
Centrifugal dehydration technology is that to utilize solid in mud be that mud and liquid are wherein that density between water is very different, and has different centrifugal force, thereby realize the two Separation of Solid and Liquid in the centrifuge of High Rotation Speed.The exemplary apparatus of centrifugal dehydration technology is horizontal screw centrifugal equipment.
The function that existing Centrifugal Machine Control System realizes is relatively simple, needs the many of manual intervention, causes waste of human resource, efficiency not high.Most domestic Centrifugal Machine Control System adopts hardware-in-the-loop to realize at present, uses fixing rotating speed (revolution speed of screw and rotary drum rotating speed) to realize poor rotating speed, under abnormal condition, must stop by manual control.
In order to make centrifugal function full automation operation; improve operational efficiency; this control system service-strong hardware configuration and perfect program picture control; what in unwatched situation, centrifuge can export to adjust whole system according to the moment of torsion of screw motor enters mud amount and other interlockings, can realize under specific circumstances the necessary interlock protections such as automatic cleaning, automatic stopping.
Summary of the invention
The purpose of this utility model is: propose the especially self-con-tained unit of horizontal screw centrifugal dehydration equipment of a kind of centrifugal dehydrator, reduce operations staff's work, raise the efficiency, realize automation control completely, guarantee device security and mud extraction effect.
Technical solution of the present utility model is: a kind of self-con-tained unit of centrifugal dehydrator, comprise the PLC that PID regulates, on centrifugal dehydrator, be respectively equipped with and drive rotary drum and screw motor, and drive respectively the frequency converter of rotary drum and screw motor, be provided with the PLC that PID regulates, wherein the real-time torque value of screw motor is transferred to PLC by frequency converter, and the adjusting electric current of the PLC output that PID regulates connects the frequency converter of screw motor, realizes the stepless speed regulation to screw motor.Centrifugal dehydrator.
The utility model utilizes PLC to realize PID regulatory function, according to spot debugging experience, sets the parameters such as ratio, integration, gain, process input quantity.Process input quantity refers to the moment of torsion output of screw motor, the reaction force of reaction centrifuge the inside mud to screw motor, by frequency converter, the real-time torque value of screw motor is transferred to PLC, the PID regulatory function of PLC can be according to the real-time torque value receiving and torque setting value (effect of this setting value is the final stable moment of torsion situation of centrifuge that allows), add gain parameter, than row parameter, after the comprehensive computing such as integral parameter, draw a regulated quantity, this regulated quantity is passed through engineering value again--control the computing conversion of current signal, the adjusting electric current of a 0-20mA of final output is to spiral variable frequency device, realize the stepless speed regulation of screw motor.
The beneficial effects of the utility model are: the adjusting electric current of the PLC output regulating by PID when normal operation connects the frequency converter of screw motor, realizes the stepless speed regulation to screw motor.In particular cases (determine according to moment of torsion) at centrifugal dehydrator, centrifugal dehydration chance realizes various emergency measures automatically, such as high speed, low speed rinse, control system can judge the running status of current centrifuge, the method of operation is made adjustment, if centrifuge moment of torsion is too high, after suitable time-delay, automatically can stop, whole control does not need personnel to participate in.
Accompanying drawing explanation
The configuration figure of Fig. 1 control device.
1:HMI man-machine interface--for operations staff's parameters, operation.
2: communication cable--for connecting PLC and touch-screen, realize exchanges data, as RS485 bus.
3:PLC fastener--for logical operation, the data that gather are calculated, centrifuge system is monitored.
4: the frequency converter of frequency converter, especially screw motor.
Specific implementation method
Complete centrifuge water is quick-witted can self-con-tained unit be to be made up of host computer man-machine interface and slave computer PLC; host computer adopts advanced integrated embedded man-machine interface; use touch technology; slave computer adopts import main flow Siemens PLC C module; integrated various working safety protection control step order; integrated level is high, and logic is simple, be swift in response.Control device has mainly been realized the monitoring function to centrifuge, comprises the start and stop of centrifuge, automatic operation, Stateful Inspection, safeguard protection, emergency processing etc.This control system outstanding feature is to utilize PLC to realize the PID automatic regulation function of centrifuge spiral, guarantees mud extraction effect and the device security of centrifuge under various operating modes.
By reference to the accompanying drawings, embodiment is as follows: hardware is selected: the required hardware of the system that controls also comprises, Switching Power Supply (for the power supply of touch-screen and PLC fastener is provided), touch-screen (for the man-machine interface of operations staff's reality), PLC(are typically as Siemens 200, there is PID logical operation and control function), frequency converter adopts Siemens S7 or Japan three to agree company products, communication cable (for realizing the exchanges data of touch-screen and PLC).Also can adopt ABB ACS510 or ACS800 frequency converter.Use PID regulatory function, under the automatic running status of centrifuge, can realize the stepless speed regulation of screw motor, can under different running environment, change revolution speed of screw in real time, reach complete Based Intelligent Control level, to meet operation demand.
Control principle: utilize the DI module on PLC fastener, read the various quantity of states of centrifuge, such as running status, malfunction, moment of torsion alarm condition etc.Utilize the DO module on PLC fastener, control relay exports to realize start and stop, the control automatically to centrifuge.Utilize the AI module on PLC fastener, read rotary drum, revolution speed of screw and the spiral moment of torsion of frequency converter feedback, through calculating and the conversion of PLC, screen display rotary drum rotating speed, revolution speed of screw, spiral moment of torsion, poor rotating speed can touched, wherein poor rotating speed is that the difference of rotary drum rotating speed and revolution speed of screw is calculated the value that speed reducing ratio obtains later again, and this value is that group will be controlled parameter.Utilize the AO module on PLC fastener, realize the stepless speed regulation to screw motor, AO module can be exported the current signal of 0--20mA, after PID calculates, can obtain a regulated quantity between 0--1, by calculating, draw an engineering value again, the current signal that AO module converts 0--20mA to according to corresponding engineering value is to frequency converter (frequency-variable controller).
Design parameter: the utility model control system mainly contains several important parameters, first is single order warning torque value, this value is generally set between 60%-80%, rinse at a high speed for centrifuge, when moment of torsion is during at 60%-80%, illustrate that now centrifuge stall is more serious, now can not normally move mud extraction, PLC can send clear instruction, can close into mud auxiliary device and dosing auxiliary device simultaneously.Second is second order warning torque value, this value is generally set in 90%, stop in emergency for centrifuge, in the time that centrifuge moment of torsion reaches 90%, illustrate that centrifuge stall is quite serious, in rational reference time delay (operated by rotary motion 10 seconds), if torque value exceedes 90% always, the centrifuge parking of can reporting to the police.The 3rd is torque setting value, and this value is determined according to on-the-spot ruuning situation, is mainly used in setting the stationary value of screw motor moment of torsion.Yield value, the parameter regulating for PID than train value, integrated value etc. need regulate according to field condition.
The automatic intelligent type decanter control that can also adopt host computer, slave computer PLC etc. to form; Host computer adopts advanced integrated embedded man-machine interface, uses touch technology, and slave computer adopts import main flow Siemens PLC C module, integrated various working safety protection control step order, and integrated level is high, and logic is simple, be swift in response.
Although the utility model discloses as above with preferred embodiment, so it is not trapezoidal in order to limit this practicality.In affiliated technical field, have and conventionally know the knowledgeable, not departing from the application's spirit and scope, when being used for a variety of modifications and variations.Therefore, protection domain of the present utility model is when being as the criterion depending on claims person of defining.
Claims (1)
1. the self-con-tained unit of a centrifugal dehydrator, it is characterized in that the PLC that comprises that PID regulates, on centrifugal dehydrator, be respectively equipped with and drive rotary drum and screw motor, and drive respectively the frequency converter of rotary drum and screw motor, be provided with the PLC that PID regulates, wherein the real-time torque value of screw motor is transferred to PLC by frequency converter, comprises that the adjusting electric current of the PLC output of PID adjusting connects the frequency converter of screw motor, realizes the stepless speed regulation to screw motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320863373.2U CN203695235U (en) | 2013-12-25 | 2013-12-25 | Automatic control device of centrifugal dehydrator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320863373.2U CN203695235U (en) | 2013-12-25 | 2013-12-25 | Automatic control device of centrifugal dehydrator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203695235U true CN203695235U (en) | 2014-07-09 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320863373.2U Expired - Lifetime CN203695235U (en) | 2013-12-25 | 2013-12-25 | Automatic control device of centrifugal dehydrator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203695235U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105127014A (en) * | 2015-08-19 | 2015-12-09 | 浙江青田瓯鹏机械制造有限公司 | Horizontal screw centrifuge gear case with automatic torque feedback function |
| CN106149246A (en) * | 2016-06-28 | 2016-11-23 | 广州番禺高勋染整设备制造有限公司 | Novel cheese dehydrator control system and its implementation |
-
2013
- 2013-12-25 CN CN201320863373.2U patent/CN203695235U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105127014A (en) * | 2015-08-19 | 2015-12-09 | 浙江青田瓯鹏机械制造有限公司 | Horizontal screw centrifuge gear case with automatic torque feedback function |
| CN106149246A (en) * | 2016-06-28 | 2016-11-23 | 广州番禺高勋染整设备制造有限公司 | Novel cheese dehydrator control system and its implementation |
| CN106149246B (en) * | 2016-06-28 | 2018-10-16 | 广州番禺高勋染整设备制造有限公司 | Cheese dehydrator control system and its implementation |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200729 Address after: No.23, Liuzhou North Road, Jiangbei new district, Nanjing, Jiangsu Province, 211500 Patentee after: Nanjing State Environmental Protection Co.,Ltd. Address before: 211048 room 03, building 420, high tech Development Zone, Pukou District, Jiangsu, Nanjing Patentee before: NANJING GUONENG ENVIRO-PROTECTION PROJECT Co.,Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140709 |