CN1146565A - Frequency-variable speed-regulating pressure changeable water supply controller - Google Patents
Frequency-variable speed-regulating pressure changeable water supply controller Download PDFInfo
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- CN1146565A CN1146565A CN 96117066 CN96117066A CN1146565A CN 1146565 A CN1146565 A CN 1146565A CN 96117066 CN96117066 CN 96117066 CN 96117066 A CN96117066 A CN 96117066A CN 1146565 A CN1146565 A CN 1146565A
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- circuit
- frequency
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- Control Of Fluid Pressure (AREA)
Abstract
The frequency control variable-pressure water-supplying controller for water-supply control system is mainly characterized by that according to the instantaneous water demand said invention adopts a method for linearly changing water-supplying pressure of water pump outlet to attain the goal of saving energy. Said controller is mainly composed of minimum pressure setting circuit, maximum pressure setting circuit, pressure-changing sample signal generation circuit, PI regulator, frequency upper limit and lower limit switching circuits and display circuit. The input signal of said controller is come from the pressure transmitter of said water-supplying system, and its output signal is connected to the frequency converter and programmable controller of the driving circuit of said water-supplying system.
Description
The present invention is a kind of device that is used for water management system, belongs to the technical field of water supply opertaing device.
More advanced water system is the constant pressure water supply frequency conversion speed-adjusting system at present, and pump outlet was to the pipeline loss sum decision of least favorable water spot when its constant voltage value was buildings topnotch and maximum water consumption.Pipeline loss H
DecreaseQ meets H with flow
Decrease=kQ
2(also claim characteristic curve of pipeline, wherein K is a constant).In the real work, water pump assembly is operated in the medium and small water yield in the most of the time, so exit of pump pressure only needs H=H
0+ KQ
2(H is instantaneous hydraulic pressure, H
0For the height at least favorable water spot place with it desired minimum water outlet pressure sum), constant-pressure variable supplies water and exceeds Δ H=K (Qm than actual required pressure
2-Q
2) (Q wherein
mMaximum flow for constant pressure water supply).When normal water supply, will waste lot of energy like this.For simple water supply network (as single building, single water end), can directly pressure unit be contained in end, make it constant pressure.And general pipe network is had a plurality of water ends, and the least favorable water spot changes with the water load variations, in theory can to might unfavorable water spot pressure gather, but the cost height of doing like this, technical difficulty is big, is not suitable for large-scale promotion.
If install flowmeter additional at the pump outlet place, detect the variable pressure and flow control that can realize ideal on the flow signal principle, but because flowmeter price height, pipeline needs particular design and installation, is not suitable for existing pipe network is transformed.
Purpose of the present invention just provides a kind of simple in structure, and is easy for installation, has the frequency-variable speed-regulating pressure changeable water supply controller of obvious energy saving effect.
Principal feature of the present invention is the size according to instantaneous water consumption, adopts the linear method of pump outlet pressure of supply water that changes to reach purpose of energy saving.Structurally by minimum pressure initialization circuit, maximum pressure initialization circuit, transformation model signal generating circuit, pi regulator (proportional and integral controller), frequency upper and lower limit on-off circuit, display circuit are formed, wherein constitute signal processing circuit, constitute on-off circuit by frequency upper and lower limit on-off circuit by minimum pressure initialization circuit, maximum pressure initialization circuit, transformation model signal generating circuit, pi regulator.The input end of the output termination transformation model signal generating circuit of minimum pressure initialization circuit and maximum pressure initialization circuit, the input end of the output termination pi regulator of pressure unit in the output terminal of transformation model signal generating circuit and the water system, the output terminal of pi regulator is one tunnel frequency converter that connects in the water supply driving circuit wherein, another road connects the input end of transformation model signal generating circuit and frequency upper and lower limit on-off circuit, the Programmable Logic Controller in the output termination water supply driving circuit of frequency upper and lower limit on-off circuit.
Wherein, minimum pressure initialization circuit and maximum pressure initialization circuit are respectively by the decimal system 8421 yards dial switch KS3, KS4, integrated circuit U
1BReach KS1, KS2, integrated circuit U
1AConstitute, the switching signal output terminal of dial switch meets integrated circuit U respectively
1AAnd U
1BInverting input.
Comprise mlultiplying circuit, voltage distribution circuit, adding circuit in the transformation model signal generating circuit, wherein mlultiplying circuit is mainly by integrated circuit U
3, U
4, U
5And transistor Q
1, Q
2Constitute, the input end of this multiplier has two, one is integrated circuit U
4AInverting input, this end and U
9AOutput terminal be connected, another is a resistance R
37Input end, this end and U
2AOutput terminal be connected.
The voltage distribution circuit is by integrated circuit U
8, U
9, U
10AReach switches set K1, K2, resistance R
17-R
24Be in series form, wherein the series connection after two connect power supply and K switch respectively
1H ' end, and the contact of per two resistance in the series circuit connects the corresponding contact of K switch 1 and K2 respectively.
Pi regulator is mainly by integrated circuit U
7AAnd U
7BAnd diode D
1, D
2, D
3, D
4Form U wherein
7AIn-phase input end be the signal input part of pressure unit, U
7AOutput terminal pass through resistance R
60, R
61With U
7BInverting input be connected diode D
3, D
4Headtotail is attempted by U
7BHomophase and inverting input on.
Frequency upper and lower limit on-off circuit is mainly by integrated circuit U
11, U
12, photoelectricity coupled circuit PC
1, PC
2, transistor Q
3, Q
4, relay J
1, J
2Form the wherein inverting input of U11A and U
11BIn-phase input end all and U
8BOutput terminal be connected transistor Q
3, Q
4Collector respectively with relay J
2, J
1Be connected.
Principle of work of the present invention and process are:
At first we need determine that the platform number of work water pump (is example with the equal-wattage) then needs setting combined switch K as 1 before work
21,1 ' two short circuit, then need K if any 2 work
22,2 ' two short circuits, and the like, the parameter of certain point need adjust in the circuit accordingly, is example explanation principle of work with 2 now.
System firm when electric, the multiplier output (U in the transformation model signal generating circuit
4: be 0 the output of B), U
2: B exports corresponding P
MinTotalizer U
6aIn only reflect P
MinValue, i.e. U
6AOutput potential is to C
7Charging makes U
6BOutput increase gradually, when this current potential greater than the pressure unit signal through U
7AVoltage after the amplification, promptly during feedback signal, PI regulating circuit U
7BOutput voltage begin from initial (0～-0.5V) increase, mlultiplying circuit output (is imported invariant position because of another road of multiplier, is P since 0 linear increasing
Max-P
Min) totalizer U correspondingly
6aOutput also increase U
6BOutput model pressure signal, and then linear increasing, promptly the model pressure signal is with U
7BOutput be linear and increase pi regulator U
7BOutput also increase, the given signal of frequency that is input to like this in the frequency converter increases, the variable frequency pump faster rotational speed, output increases, and pressure of supply water is faster speed and increases, the signal that pressure unit feeds back also increases, because of gathering way of it compared U
6BOutput model pressure signal gathers way soon, so they can reach equal at a certain state, makes pi regulator reach the balance duty.Increase as water consumption this moment again, hydraulic pressure can slightly descend, the feedback signal of pressure unit can reduce, and can produce situation about introducing previously again, reaches 50Hz as frequency conversion this moment output frequency, variable frequency pump is speedup again, the upper limiting frequency switch motion is through external control (PC), about time-delay 10S, start fixed displacement pump (constant speed running pump), and make K
1A, a ' two-end-point short circuit makes the output of voltage distribution circuit increase a definite value, this moment, the variable frequency pump rotating speed can very fast decline, system reaches a new balance again.Reduce as water consumption, former pressure of supply water is slightly high, and the pressure unit feedback signal is greater than the model signal, and pi regulator output reduces, the variable frequency pump rotating speed reduces, when dropping to one regularly, the action of lower frequency limit on-off circuit, through about external control (PC) time-delay 10S, cut off fixed displacement pump (constant speed pump), and make K
1A, a ' two-end-point disconnects.So automatically, adapt to control, pressure of supply water is changed with the variation of water consumption.
The invention has the advantages that:
1, energy-saving effect is obvious.This controller adopts the linear method that changes the pump outlet pressure of supply water according to the size of instantaneous water consumption, guarantees that pump outlet pressure of supply water and instantaneous water consumption adapt, neither superpressure supplies water, also therefore negative pressure water supply not can be saved a large amount of electric energy, and can guarantee normal water supply.
2, simple in structure, easy for installation.The present invention is simple in structure, and all devices are installed on the wiring board, and general structure is simple and clear, and without any the place that specific (special) requirements is arranged, so manufacturing process is simple, and is easy for installation, can be easily and the supporting use of various water systems.
3, highly versatile, applied range.Join because this controller has the frequency converter and the Programmable Logic Controller of driving circuit in general output interface and the water system, therefore can be connected with the various control circuits in the automatic water supply system, versatility is stronger.
Fig. 1 is a structured flowchart of the present invention.Comprising frequency converter 8 and the Programmable Logic Controller 9 in minimum pressure initialization circuit 1, maximum pressure initialization circuit 2, transformation model signal generating circuit 3, pi regulator 4, frequency upper and lower limit on-off circuit 5, display circuit 6, pressure unit 7, the water supply driving circuit.
Fig. 2 is a circuit structure schematic diagram of the present invention.
Embodiment of the present invention are as follows:
Frequency-variable speed-regulating pressure changeable water supply controller of the present invention is made up of minimum pressure initialization circuit 1, maximum pressure initialization circuit 2, transformation model signal generating circuit 3, pi regulator 4, frequency upper and lower limit on-off circuit 5, display circuit 6, and wherein minimum pressure initialization circuit 1 is mainly by the decimal system 8421 dial switch KS3, KS4 and integrated circuit U
1BForm; Maximum pressure initialization circuit 2 is formed U by the decimal system 8421 dial switch KS1, KS2 and integrated circuit U1A
1AWith U
1BShared one " LM358 " two suitable integrated circuit of putting.Transformation model signal generating circuit 3 comprises adding circuit U
2A, U
2B, U
6A, mlultiplying circuit U
3, U
4, U
5And transistor Q
1, Q
2, the voltage distribution circuit U
8, U
9, U
10And resistance R
17～R
24And K switch
1, K
2, delay circuit U
6B, R
51, R
52, C
7, integrated circuit U wherein
5Be " N555 " time base circuit, U
2, U
3, U
4, U
6, U
8, U
9, U
10Adopt " LM358 " double operational integrated circuit, transistor Q
1, Q
2Model be " 8050 ".Pi regulator 4 is mainly by integrated circuit U
7AAnd U
7BForm U
7AAnd U
7BShared " LM358 " double operational integrated circuit, in the water system, pressure unit 7 passes through resistance R
56Be connected on U
7AThe in-phase input end frequency, upper and lower limit on-off circuit 5 is by integrated circuit U
11, U
12And photoelectrical coupler PC
1, PC
2Relay J
1, J
2With transistor Q
3, Q
4Form, wherein integrated circuit U
11Be " LM393 " dual comparator, U
12Be " 40106 " hex inverter, the model of photoelectrical coupler PC1, PC2 is " TIL521-1 ", transistor Q
3, Q
4Model be " 8050 ".Relay J is passed through in the output of this partial circuit
1, J
2Be connected with the Programmable Logic Controller in the water pump driving circuit.According to the above, just can form frequency-variable speed-regulating pressure changeable water supply controller of the present invention.
Claims (7)
1. frequency-variable speed-regulating pressure changeable water supply controller, formed by signal processing circuit and on-off circuit, the signal processing circuit that it is characterized in that this controller is by minimum pressure initialization circuit (1), maximum pressure initialization circuit (2), transformation model signal generating circuit (3), pi regulator (4) constitutes, on-off circuit is by on the frequency, the limit switch circuit constitutes, wherein, the input end of the output termination transformation model signal generating circuit (3) of minimum pressure initialization circuit (1) and maximum pressure initialization circuit (2), the input end of the output termination pi regulator (4) of the output terminal of transformation model signal generating circuit (3) and the pressure unit in the water system (6), the output terminal of pi regulator (4) is one tunnel frequency converter (7) that connects in the water supply driving circuit wherein, another road connects on transformation model signal generating circuit (3) and the frequency, the input end of limit switch circuit (5) is on the frequency, Programmable Logic Controller (8) in the output termination water supply driving circuit of limit switch circuit (5).
2. frequency-variable speed-regulating pressure changeable water supply controller according to claim 1 is characterized in that this controller adopts the linear method that changes the pump outlet pressure of supply water according to the size of instantaneous water consumption.
3. frequency-variable speed-regulating pressure changeable water supply controller according to claim 1 and 2 is characterized in that minimum pressure initialization circuit (1) and maximum pressure initialization circuit (2) are respectively by dial switch KS3, KS4, U
1AReach KS1, KS2, U
1BConstitute, the output terminal of switching signal meets U respectively
1AAnd U
1BInverting input.
4. frequency-variable speed-regulating pressure changeable water supply controller according to claim 1 and 2 is characterized in that mlultiplying circuit in the transformation model signal generating circuit (3) is mainly by integrated circuit U
3, U
4, U
5And transistor Q
1, Q
2Formation, the input end of this multiplier has 2, one is the inverting input of integrated circuit U4A, this end and U
9AOutput terminal be connected, another is a resistance R
37Input end, this end and U
2AOutput terminal be connected.
5. frequency-variable speed-regulating pressure changeable water supply controller according to claim 1 and 2 is characterized in that voltage distribution circuit in the transformation model signal generating circuit (3) is by U
8, U
9, U
10A, K
1, K
2And resistance R
17～R
24Form resistance R wherein
17～R
24Be in series, the two after its series connection connects the h ' end of power supply and K switch 1 respectively, and the contact of per two resistance in the circuit that is in series, and connects the corresponding contact of K switch 1 and K2 respectively.
6. frequency-variable speed-regulating pressure changeable water supply controller according to claim 1 and 2 is characterized in that pi regulator (4) is mainly by integrated circuit U7A and U7B and diode D
1, D
2, D
3, D
4Form U wherein
7AWith in-phase input end be the signal input part of pressure unit, U
7AOutput terminal pass through resistance R
60, R
61With U
7BInverting input be connected diode D
3, D
4Headtotail is attempted by U
7BHomophase and inverting input on.
7. frequency-variable speed-regulating pressure changeable water supply controller according to claim 1 and 2 is characterized in that frequency upper and lower limit on-off circuit (5) is mainly by integrated circuit U
11, U
12, photoelectricity coupled circuit PC1, PC2, transistor Q
3, Q
4, relay J
1, J
2Form U wherein
11AInverting input and U
11BIn-phase input end all and U
8BOutput terminal be connected transistor Q
3, Q
4Collector respectively with relay J
2, J
1Be connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96117066 CN1146565A (en) | 1996-08-20 | 1996-08-20 | Frequency-variable speed-regulating pressure changeable water supply controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96117066 CN1146565A (en) | 1996-08-20 | 1996-08-20 | Frequency-variable speed-regulating pressure changeable water supply controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1146565A true CN1146565A (en) | 1997-04-02 |
Family
ID=5124005
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96117066 Pending CN1146565A (en) | 1996-08-20 | 1996-08-20 | Frequency-variable speed-regulating pressure changeable water supply controller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1146565A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102269978A (en) * | 2010-06-07 | 2011-12-07 | 上海熊猫机械(集团)有限公司 | Time interval optimizing water supply controller |
| CN102859084A (en) * | 2010-04-30 | 2013-01-02 | 盖普工业系统有限公司 | Method and system for carrying out closed-loop or open-loop control of the water pressure in a pressure zone and device for carrying out and for operating same |
-
1996
- 1996-08-20 CN CN 96117066 patent/CN1146565A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102859084A (en) * | 2010-04-30 | 2013-01-02 | 盖普工业系统有限公司 | Method and system for carrying out closed-loop or open-loop control of the water pressure in a pressure zone and device for carrying out and for operating same |
| CN102859084B (en) * | 2010-04-30 | 2014-12-03 | 盖普工业系统有限公司 | Method and system for carrying out closed-loop or open-loop control of the water pressure in a pressure zone and device for carrying out and for operating same |
| CN102269978A (en) * | 2010-06-07 | 2011-12-07 | 上海熊猫机械(集团)有限公司 | Time interval optimizing water supply controller |
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|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |