CN102418703A - Online matching control device for intelligent water pump system - Google Patents
Online matching control device for intelligent water pump system Download PDFInfo
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- CN102418703A CN102418703A CN2011103855559A CN201110385555A CN102418703A CN 102418703 A CN102418703 A CN 102418703A CN 2011103855559 A CN2011103855559 A CN 2011103855559A CN 201110385555 A CN201110385555 A CN 201110385555A CN 102418703 A CN102418703 A CN 102418703A
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Abstract
The invention discloses an online matching control device for an intelligent water pump system. A pressure difference transducer, a flowmeter and an electric regulating valve are arranged on a water pump inlet and outlet pipeline; a touch screen, a programmable logic controller and a wireless data transmission module for forming an expert controller are arranged near a water pump; an electric quantity transducer and the wireless data transmission module are arranged on an electric control cabinet; real-time operating parameters of the water pump are transmitted to the programmable logic controller through a data acquisition channel; real-time characteristic curves, working condition points and operating parameters of the water pump are displayed on the touch screen through operation of the expert controller, and the electric regulating valve is controlled; therefore, the water pump operates at the highest efficiency point. The online matching control device for the intelligent water pump system has the characteristics of simple structure, convenient installation and debugging and obvious energy-saving effect. The water pump efficiency can be improved by 7 percent, the shaft power is reduced by 6kW, and the energy is saved by 12.2 percent. The device can be widely applied in energy-saving design and transformation of water pump systems in various fields.
Description
Technical field
The present invention relates to the online matching control apparatus of a kind of intelligent water pump system in fields such as metallurgy, petrochemical industry, papermaking, power plant, machinery, mine, stove, building, urban water supply and sewerage, heating plant, oil field, large-scale agricultural irrigation, central air conditioning.
Background technique
The universal machine that water pump is a wide application, amount is big.Water pump uses and spreads all over each production of national economy, life department, like metallurgy, petrochemical industry, papermaking, power plant, machinery, mine, stove, building, urban water supply and sewerage, heating plant, oil field, large-scale agricultural irrigation, steamer ...
Present water pump system operational efficiency is low, power consumption is huge, level falls behind.Show according to authoritative data; China's electric system power consumption accounts for 60% of national power consumption at present; Wherein the power consumption of water pump, blower fan, compressor and air conditioner refrigerating device accounts for 20.9%, 10.4%, 9.4% and 6% of national power consumption respectively; " three machines, one pump (blower fan, compressor, refrigerator and water pump) " total power consumption accounts for 46.9% of national electricity consumption total amount, be close to and account for the half the of the total power consumption of country, and single water pump just consumes 20.9% of total electric weight.Past is because China Higher education professional module is divided too thin; Performance study to water pump only limits to this professional content; Water pump is held performance after the system, and that the systematic science principle understanding of basic change will take place is unclear; Pump performance and pipe-line system characteristic and operation control strategy do not match; Add that the design office design and calculation method falls behind, the water pump capacity of selection is 1.7 times of actual demand at least, water pump generally in big flow, the little temperature difference, low load with strong power is inefficient and how be unable to explain clearly in the system matches situation, move under the state of feeling about in the dark that the road is not clear.The operational efficiency of China's pump type systematic is about 30% according to statistics, than abroad approximately low 20%; China's per GDP energy consumption is 3 times of the U.S., is more than 10 times of Japan, and water pump fallback " merit " can not have.Therefore solving the problem of water pump operation highly energy-consuming, poor efficiency and backwardness level from theory and practice, should be China 12 planning unit GDP one of contents of 16% challenge that lower consumption.
Summary of the invention
The object of the present invention is to provide a kind of simple in structure, install, debugging is convenient, energy-saving effect significantly under the control of control gear, water pump can be constantly at the online matching control apparatus of intelligent water pump system of best efficiency point operation.
In order to overcome the deficiency of existing technology, technological scheme of the present invention is to solve like this: this matching control apparatus comprises by touch screen and programmable controller and constitutes Expert Controller; Pressure difference transmitter, flow transmitter constitute the water pump operation parameter measurement instrument; Power transducer, frequency transmitter, electric parameters transducer and wireless data transfer module constitute water pump electric weight remote sensing instrument; Electric control valve is taken on actuator; Frequency variator, pump motor, water pump and pipe-line system constitute controlled device, and above-mentioned link has constituted expert control system jointly, and special way of the present invention is that near said water pump, the installation constitutes Expert Controller by touch screen TS and programmable controller PLC; Said pressure difference transmitter Δ P is installed on the import and export pipeline of water pump P 1, flow transmitter F is installed on outlet conduit constitutes the water pump operation parameter measurement instrument; Electric parameters transducer TEQ such as pump power transmitter W, frequency transmitter f, electric current and voltage, wireless data transfer module GPRS formation water pump electric weight remote sensing instrument are installed respectively on the said electric control cubicle of pump variable frequency in the distance; The electric control valve EV1 that installs on the exit of pump pipeline takes on actuator; Said frequency variator VFD, pump motor M, water pump P 1 and pipe-line system constitute controlled device; Said Expert Controller is made up of system's water pump knowledge base, comparing element, data processing system, message handler, inference machine, rule set; Said Expert Controller, actuator, system's water pump and sensor groups four processes constitute expert control system, and said pressure difference transmitter Δ P, flow transmitter F lift, the flux signal that water pump is real-time are transported among touch screen TS and the programmable controller PLC through A/D converter; The real-time electric quantity signal of said water pump passes through the signal conveys of wireless data transfer module GPRS in touch screen TS and programmable controller PLC; Said pressure difference transmitter Δ P, flow transmitter F lift, the flux signal that water pump is real-time are transported among touch screen TS and the programmable controller PLC through A/D converter; Said Expert Controller is connected to form by system's water pump knowledge base, comparing element, data processing system, message handler, inference machine, rule set successively; Said Expert Controller and actuator, system's water pump and sensor groups four processes connect and compose expert control system.
Through the expert control system computing; On touch screen TS, demonstrate water pump real-time characteristic curve, real-time working condition point, real time execution parameter; Export SC sigmal control mortor operated valve EV1 simultaneously; Change pump capacity, the system water pump of making moves at best efficiency point constantly, thereby reaches the absolutely clear and purpose of energy saving to the water pump operation operating mode.
Compared with prior art; The present invention proposes according to " energy saving of system " theoretical integration water pump system Energy saving theory, Computer Control Technology, computer graphics techniques, computer networking technology, computer radio networking technology; Have simple in structurely, install, debugging is convenient, the characteristics of obvious energy conservation.Water pump online in real time operation information image clearly shows on touch screen; Mortor operated valve EV1 is under the control of Expert Controller output signal; Change pump capacity, the system water pump of making is constantly in the best efficiency point operation, overcome traditional water pump feel about in the dark operation and not energy-conservation shortcoming.In the example that provides, the efficient of water pump improves more than 7%, and air horsepower reduces 6kW at least, and energy-conservation 12.2%.
The online matching control apparatus of intelligent water pump system has following distinguishing feature in sum:
1). the graphic display of water pump real time execution parameter acquisition: real-time inlet outlet pressure differential (lift), flow, useful energy output, power input to machine, frequency, the pump efficiency of water pump is presented on the touch screen; The user can absolutely clearly know the running situation that water pump, frequency variator, pipeline form, the cost that needs flower or the like information, consumes as clear as noondayly, eliminated traditional water pump feel about in the dark blindly use, feel unsure of, the application situation of poor efficiency, expense ability.
2). water pump capacity coupling diagnosis: add the collection of cold machine out temperature or cooling tower out temperature and ambient temperature, can carry out the calculating and the diagnosis of water pump capacity coupling of system's maximum load demand;
3). online water pump feature measurement: after installing the online matching control apparatus of intelligent water pump system first; Can obtain online water pump actual characteristic through method for scanning; So that the user knows what's what to the water pump actual characteristic, the propaganda of exempting some water pump manufacturers misleads.
4). combine with complete similar frequency conversion or velocity fluctuation pump control technique; Can make water pump system reach the boundary of " configuration rationally; operation is coordinated "; The minimum cost of can spending water pump system realizes the control of real-time tracking load variations, can reach the water pump dissipative system that people dream of clever, IQ is arranged, with can state with having sagacity, simplified the management of water pump system energy-saving run greatly.
5). the online matching control apparatus of intelligent water pump system, can be used as the water pump quality inspection detector of the State Bureau of Quality Supervision, selective examination be manufacturer or online water pump product performance;
6). water pump vane fault diagnosis, warning: water pump descends pump efficiency because of the cavitation erosion impeller surface produces pit, can be through detecting the decline degree of water pump peak efficiency, the degree that the knot dirt is stained with on the cavitation erosion degree of estimation water pump or water pump blade surface.
7). the online matching control apparatus of intelligent water pump system is open; Can incorporate any kind control system: it is optional that device has various standard communication modules, and device can be held in the building control system or plant control system of DCS, BAS, any type of PLC.
The present invention can be widely used in the energy-saving design and reducing energy consumption of steel mill, chemical plant, large-scale central air-conditioner water pump system.
Description of drawings
Fig. 1 is a structural representation skeleton diagram of the present invention;
Fig. 2 is the control principle structural representation block diagram of Fig. 1;
Fig. 3 is the characteristic curve of pump figure of Fig. 1.
Description of reference numerals: 1-touch screen, programmable controller; The 2-flow transmitter; The 3-electric control valve; The 4-wireless data transfer module; The 5-electric parameters transducer; The 6-power transducer; The 7-frequency variator; The 8-frequency transmitter; The 9-pump motor; The 10-water pump; The 11-pressure difference transmitter; 12-system water pump knowledge base; 13-actuator; 14
-System's water pump; The 15-sensor groups; The 16-rule set; The 17-inference machine; The 18-data processing system; The 19-message handler; The 20-comparing element; The 21-Expert Controller.
Embodiment
Accompanying drawing is embodiments of the invention.
Below in conjunction with accompanying drawing summary of the invention is described further:
With reference to Fig. 1, shown in Figure 2, the online matching control apparatus of a kind of intelligent water pump system comprises that touch screen and programmable controller constitute Expert Controller; Pressure difference transmitter, flow transmitter constitute the water pump operation parameter measurement instrument; Power transducer, frequency transmitter, electric parameters transducer, wireless data transfer module constitute water pump electric weight remote sensing instrument; Electric control valve is taken on actuator; Frequency variator, pump motor, water pump, pipeline constitute controlled device; System's water pump knowledge base, comparing element, data processing system, message handler, inference machine, rule set constitute Expert Controller; Expert Controller, actuator, system's water pump, sensor groups four processes constitute expert control system.Near the said Expert Controller 21 that constitutes by touch screen TS and programmable controller PLC 1 of water pump, installing; Pressure difference transmitter Δ P 11 is installed on the import and export pipeline of said water pump P 1 10, flow transmitter F 2 formation water pump operation parameter measurement instruments are installed on outlet conduit; Electric parameters transducer TEQ (5) such as pump power transmitter W 6, frequency transmitter f 9, electric current, voltage, wireless data transfer module GPRS (4) formation water pump electric weight remote sensing instrument are installed respectively on the said electric control cubicle of pump variable frequency in the distance; Electric control valve EV1 (3) takes on actuator; Frequency variator VFD 7, pump motor M 9, water pump P 1 10 and pipe-line system constitute controlled device; Said Expert Controller 21 is connected to form by system's water pump knowledge base 12, comparing element 20, data processing system 18, message handler 19, inference machine 17, rule set 16 successively; Said Expert Controller 21, actuator 13, system's water pump 14 and sensor groups 15 four processes constitute expert control system, and the real-time electric quantity signal of said water pump is transported among touch screen TS and the programmable controller PLC 1 through water pump electric weight remote sensing instrument; Said pressure difference transmitter Δ P 11, flow transmitter F 2 lift, the flux signal that water pump is real-time are transported among touch screen TS and the programmable controller PLC 1 through A/D converter; Through the expert control system computing; Output SC sigmal control electric control valve EV1 3; Change pump capacity, the system water pump of making moves at best efficiency point constantly, thereby reaches the absolutely clear and purpose of energy saving to the water pump operation operating mode.
Water pump system is the multi-parameter complex system that is mutually related.Matching control apparatus constitutes Expert Controller by touch screen, programmable controller (TS+PLC) 1; Between water pump P 1 10 is imported and exported, pressure difference transmitter Δ P 11 is installed, at exit of pump flow transmitter F 2 is installed and constitutes the water pump operation parameter measurement instrument; The water pump electric weight remote sensing instrument of electric parameters transducer TEQ 5 such as pump power transmitter W 6, frequency transmitter f 8, current/voltage, wireless data transfer module GPRS 4 formations is installed at pump variable frequency electricity system cabinet place; Electric control valve EV1 3 takes on actuator; Frequency variator VFD 7, pump motor M 9, water pump P 1 10 and pipe-line system constitute controlled device; The real-time electrical parameter of water pump P 1 10 is sent in touch screen, the programmable controller (TS+PLC) 1 through water pump electric weight remote sensing instrument; Pump capacity, lift are sent among the PLC 1 through A/D converter; Control the reasoning computing of software data processing system through the expert; Output SC sigmal control electric control valve EV1 3; Change pump capacity, the system water pump of making in the best efficiency point operation, utilizes computer graphics techniques that water pump online in real time Operational Limits and operating point are shown on the screen of touch screen TS visually constantly simultaneously.Consider that water pump high-voltage frequency-changing electricity system cabinet is far away from system's water pump; With GPRS wireless networking technology or ISM wireless networking technology or power carrier communication technology, the pump motor that water pump electric weight remote sensing instrument is collected, various electrical parameter the spread of the rumours of frequency variator are to (TS+PLC) 1.So the online matching control apparatus of intelligent water pump system is the target of moving at best efficiency point constantly according to system's water pump, multi-door modern technologies innovations such as integration system water pump principle, computer graphics techniques, radio network technique are come out under " energy saving of system " theoretical direction.
It is that God is to our severe and just Energy saving theory examination that pump energy saving is used actual; The situation that water pump is long-time, fallback appears in large size; Explain that we fail in the Energy saving theory examination; We also do not have to grasp the water pump system Energy saving theory that meets objective law, not too are familiar with essence, moving law property and the characteristics of water pump dissipative system.The modern theory of knowledge is thought, observes and is permeating theory, and the Chairman Mao also says: " sensation only solves the phenomenon problem, the theoretical essential problem that just solves." the theory decision world, change not problem of energy saving of water pump, at first to solve the theoretical question that water pump is used in system.
Fig. 2 is the control principle structural representation block diagram of Fig. 1.Expert Controller 21 is made up of system's water pump knowledge base 12, comparing element 20, data processing unit 18, information process unit 19, reasoning element 17, rule set 16; Expert Controller 21, actuator 13, system's water pump 14 and sensor groups 15 four processes constitute expert control system.Water pump online in real time Operational Limits and electrical quantity are sent in the Expert Controller 21 of touch screen and programmable controller 1 formation; Expert Controller is according to water pump real time execution parameter; Through each link data processing; Output SC sigmal control electric control valve EV1 (3) changes the system water pump duty, and the system water pump of making demonstrates real-time characteristic curve, real-time working condition point, the real time execution parameter of water pump simultaneously visually constantly in the best efficiency point operation on touch screen TS.
The online matching control apparatus of intelligent water pump system is the online coupling expert control system of the water pump system of closed loop.The software of data processing system is programmed by the thought of block diagram.Water pump system receive the variation of load variations, valve regulated, water pump operation platform number or the like disturbing factor (
F) influence, make water pump depart from best efficiency point work, it is the variation of real-time parameters such as flow, pressure, electric weight and the data processing unit that is input to the expert data processing system that the pump sensor group has measured water pump, calculates the actual efficient of online water pump
η t With calculate the peak efficiency setting value according to actual measurement parameter and system's water pump knowledge base
η 0Compare and draw deviation delta
η, deliver to the message handler of expert system, through computing output signal
SBe sent to inference machine, through the reasoning computing output information of inference machine
IRemove computing selection output signal in the rule set
UControl executing mechanism (electric control valve) changes pump capacity, overcomes interference
FThe influence that causes makes water pump get back to the interior operation of scope that best efficiency point allows fluctuation again.So go round and begin again, water pump is moved at best efficiency point constantly.
The formation process of the online matching control apparatus of intelligent water pump system is such: according to the model characteristic of actual water system water pump; Pressure difference transmitter Δ P, flow transmitter F, electric parameters transducer TEQ, GPRS data transmission module and the PLC of selected suitable range, type and touch screen TS such as accompanying drawing 1 constitute the online matching control apparatus of intelligent water pump; According to accompanying drawing 2 establishment expert data processing system softwares; Examination is transferred; Be delivered for use, just constitute and the online matching control apparatus of intelligent water pump system that water pump system combines together.
Shown in Figure 3 is Wilo-NP150/315V 1450rpm φ 356 type characteristic curve of pump.With this water pump system as a calculated examples of the present invention.The design conditions point of water pump for (
L, Δ
P,
η p ,
W p )=(350,38,85%, 43).
Wherein:
L---pump capacity, m
3/ h;
Δ
P---pump head, mH
2O;
η p ---water pump spindle efficient, %;
W p ---pump shaft power, kW.
Intelligent water pump system online matching control apparatus actual measurement pump capacity is 460 m
3/ h is 1.31 times of design discharge.Actual conditions point for (
L, Δ
P,
η p ,
W p )=(460,32,79%, 49).If the water pump design discharge is selected correct, if the water pump of leaving in big flow, the little temperature difference, low usefulness state operation, 31% what do is idle work in the declared working condition pump capacity.If be equipped with the online matching control apparatus of intelligent water pump system, in the best efficiency point operation, the efficient of water pump can improve 7% to control of pump constantly, and air horsepower can reduce 6kW, energy-conservation 12.2%.
Because the online matching control apparatus of intelligent water pump system proposes according to " energy saving of system " is theoretical, if combine, just constituted complete, perfect pump energy saving theory and technology system with " energy saving of system " theoretical other technologies that propose.
As combining with water pump capacity diagnostic techniques, it is big by 31% that matching control apparatus detects water pump Capacity Ratio actual demand, matches a water pump that is complementary with the water system characteristic again, then reaches flow 350 m that system needs
3The water pump that/h and water system characteristic are complementary calculates only needs lift 18.5mH
2O.Select Wilo-NP125/250V 1470rpm φ 267.5 type pump performances can satisfy such requirement.Looking into the Wilo-NP125/250V pump characteristic, need air horsepower 19.8 kW, only is 40% of raw water pump actual motion power consumption, energy-conservationly surpasses 50%.As add the technology of " spending minimum cost to realize the process of real-time tracking load variations "; Then theoretical calculation is at full similar operating condition; The water pump power consumption be merely coupling new water pump power consumption 21.6%; At this moment water pump be in clever, IQ is arranged, with can state with having sagacity, can obtain best energy-saving effect.
The calculating case shows, the water pump actual flow adopts the efficient of matching control apparatus water pump to improve more than 7% during than big 1.31 times of rated flow, and air horsepower reduces 6kW at least, energy-conservation 12.2%.If the water pump actual flow then adopts the energy-conservation effect of matching control apparatus remarkable more than big many more of rated flow.The present invention proposes according to " energy saving of system " is theoretical, if combine with " energy saving of system " theoretical other technologies, then energy-saving effect is more remarkable.With the example in the specification, if through " changing the high effective pump that is complementary with the pipe-line system characteristic ", water pump at least can energy-conservation 50%; If add " spending minimum cost to realize the control procedure technology of real-time tracking load variations ", can also increase substantially energy-saving effect.(calculate in theory, at full similar operating condition, the water pump power consumption is 21.6% of a new water pump rated disspation.）。
Claims (1)
1. matching control apparatus that the intelligent water pump system is online, this matching control apparatus comprise that touch screen and programmable controller constitute Expert Controller; Pressure difference transmitter, flow transmitter constitute the water pump operation parameter measurement instrument; Power transducer, frequency transmitter, electric parameters transducer and wireless data transfer module constitute water pump electric weight remote sensing instrument; Electric control valve is taken on actuator; Frequency variator, pump motor, water pump and pipe-line system have constituted controlled device; Said Expert Controller is to be made up of system's water pump knowledge base, comparing element, data processing system, message handler, inference machine, rule set; Said Expert Controller, actuator, system's water pump, sensor groups four processes constitute expert control system, it is characterized in that near the said Expert Controller (21) that is made up of touch screen TS and programmable controller PLC (1) of water pump, installing; Pressure difference transmitter Δ P (11) is installed on the import and export pipeline of said water pump P 1 (10), the water pump operation parameter measurement instrument that flow transmitter F (2) constitutes is installed on outlet conduit; Pump power transmitter W (6), frequency conversion rate transmitter f (8), electric parameters transducer TEQ (5), wireless data transfer module GPRS (4) formation water pump electric weight remote sensing instrument are installed respectively on the said electric control cubicle of pump variable frequency in the distance; Said electric control valve EV1 (3) takes on actuator; Said frequency variator VFD (7), pump motor M (9), water pump P 1 (10) and pipe-line system constitute controlled device; The real-time electric quantity signal of said water pump arrives among touch screen TS and the programmable controller PLC (1) through the signal conveys of wireless data transfer module GPRS (4); Said pressure difference transmitter Δ P (11), flow transmitter F (2) lift, the flux signal that water pump is real-time are transported among touch screen TS and the programmable controller PLC (1) through A/D converter; Said Expert Controller (21) is connected to form by system's water pump knowledge base (12), comparing element (21), data processing system (18), message handler (19), inference machine (17), rule set (16) successively; Said Expert Controller (21) connects and composes expert control system with actuator (13), system's water pump (14) and sensor groups (15) four processes.
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| CN102937502A (en) * | 2012-11-07 | 2013-02-20 | 昆山北极光电子科技有限公司 | Pressure measuring method of rotator |
| CN103671054A (en) * | 2013-12-06 | 2014-03-26 | 杭州哲达科技股份有限公司 | Non-sensing constant-current frequency conversion method and device for fluid transfer and distribution system |
| CN104678870A (en) * | 2015-02-03 | 2015-06-03 | 江苏振翔车辆装备股份有限公司 | Remote fault monitoring system of fire-fighting truck water pump |
| CN104863833A (en) * | 2014-02-25 | 2015-08-26 | 阿思科尔控股责任有限公司（独资） | Enhanced method for controlling pumping station within fluid circulation system, related circulation system and pumping station for realizing method |
| CN105241157A (en) * | 2015-09-17 | 2016-01-13 | 深圳市宏事达能源科技有限公司 | Cold-source digital intelligent control system device |
| CN109707635A (en) * | 2018-12-11 | 2019-05-03 | 中国航空工业集团公司金城南京机电液压工程研究中心 | A kind of centrifugal pump |
| CN110332141A (en) * | 2019-08-15 | 2019-10-15 | 湖北拓宇水电科技股份有限公司 | A kind of pumping plant optimization operation control system |
| US11035368B2 (en) | 2016-05-31 | 2021-06-15 | Fluid Handling Llc | Pump control design toolbox technique for variable speed pumping applications |
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