CN202530510U - Frequency conversion and voltage transformation control system for centralized water supply - Google Patents
Frequency conversion and voltage transformation control system for centralized water supply Download PDFInfo
- Publication number
- CN202530510U CN202530510U CN2012201177838U CN201220117783U CN202530510U CN 202530510 U CN202530510 U CN 202530510U CN 2012201177838 U CN2012201177838 U CN 2012201177838U CN 201220117783 U CN201220117783 U CN 201220117783U CN 202530510 U CN202530510 U CN 202530510U
- Authority
- CN
- China
- Prior art keywords
- water supply
- control system
- water
- pressure
- variable
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Control Of Fluid Pressure (AREA)
- Flow Control (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
The utility model provides a frequency conversion and voltage transformation control system for centralized water supply. The control system comprises a water pump, a water supply pipeline, a frequency converter and a pressure sensor. A flow sensor capable of sensing the fluid flow and converting the fluid flow into usable output signals is arranged on the water supply pipeline. The control system further comprises a programmable logic controller (PLC). The water pump is connected with the PLC through the frequency converter, and the flow sensor and the pressure sensor are also connected with the PLC respectively. According to the frequency conversion and voltage transformation control system for centralized water supply, no matter in the trough period or in the peak period of water consumption, the user water supply pressure can be guaranteed to be basically unchanged, the system outlet pressure is reduced when the water consumption amount is small, and the system outlet pressure is increased when the water consumption amount is large; accordingly, the waste of the power resource caused by the loss of the water resource and the unreasonable arrangement of the water pump working condition due to the over-high pipeline pressure is reduced, and the water supply quality is guaranteed, and the control system is energy saving and consumption reducing.
Description
Technical field
The utility model relates to a kind of water supply facilities, is specifically related to a kind of central water supply variable-frequency variable-voltage and controls system.
Background technology
Water supply scheme commonly used is a constant pressure water supply in rural area and central water supply system of townlet at present.The constant pressure water supply system is made up of water pump, frequency converter and the pressure sensor that is contained in the system outlet place.When pressure of supply water was lower than setting pressure, frequency converter increased the supply frequency of water pump, thereby made the rotating speed rising of water pump that pressure of supply water is risen; When pressure of supply water was higher than setting pressure, frequency converter reduced the supply frequency of water pump, thereby made the rotating speed reduction of water pump that pressure of supply water is descended, and regulated pump rotary speed through frequency converter and made the system outlet pressure stability in setting value.
During constant pressure water supply, no matter how the system water supply amount changes, system outlet pressure is constant basically.Increase in the water use peak phase along with output, the flow velocity of water also increases in the pipeline, causes the pipeline frictional head loss significantly to increase (the approximate quadratic power that is proportional to the pipeline mean flow rate of pipeline frictional head loss).Significantly descend at water use peak phase user side hydraulic pressure like this, be difficult to guarantee normal water supply.When water supply volume hour, the pipeline frictional head loss is much smaller than system outlet pressure, and user side hydraulic pressure height causes damage by water to increase, this moment water pump operation in low discharge, high-lift operating mode, efficient and power factor (PF) are low, cause electric power resource to waste.
The utility model content
To the problem that exists in the above prior art, the utility model provides a kind of central water supply variable-frequency variable-voltage control system that supplies water, stablizes hydraulic pressure as required.
The utility model is realized through following technical scheme:
Central water supply variable-frequency variable-voltage control system comprises water pump, water supply line, frequency converter and pressure sensor, and said water supply line is provided with the flow transmitter that can experience fluid flow and convert usable output signal to;
Also comprise measured value in the control system through pressure sensor; And the setting value that calculates the water supply line outlet pressure through the flow transmitter measured value; Utilize the difference of piezometry value and pressure set points to confirm the output frequency of frequency converter, and water pump is carried out the PLC controller of speed regulating control;
Said water pump is connected in the PLC controller through frequency converter, and said flow transmitter also is connected with the PLC controller respectively with pressure sensor.
Said control system also comprises and is arranged at the level sensor that is connected with said PLC controller in the storage cistern.
Said pressure sensor is located at the nearly exit of water supply line, and said flow transmitter is located on the water supply line between water pump and the pressure sensor.
Said water supply line is provided with the flap valve that prevents aqueous reflux.
The beneficial effect of the utility model is: through the connection between flow transmitter, pressure sensor and the PLC controller; Output frequency to frequency converter is controlled; Thereby water pump is adjusted control, the water system outlet pressure is changed with the variation of output.No matter realized is in water low ebb or water use peak phase; Can both guarantee that the user side pressure of supply water is constant basically; At water supply volume hour reduction system outlet pressure; Improve system outlet pressure when water supply volume is big, the unreasonable electric power resource waste that causes is set, not only guarantee quality of water supply but also save energy and reduce the cost thereby reduce the water resource loss and the pump operating condition that cause because of loine pressure is too high.
Description of drawings
Fig. 1 is the structural representation of the utility model;
Fig. 2 is water system hydraulic performance figure.
Among the figure: 1 is water pump; 2 is water supply line; 3 is frequency converter; 4 is pressure sensor; 5 is flow transmitter; 6 is the PLC controller; 7 is storage cistern; 8 is level sensor; 9 is flap valve.
The specific embodiment
Below in conjunction with the accompanying drawing and the specific embodiment the utility model is explained further details.
The utility model provides a kind of central water supply variable-frequency variable-voltage to control system; As shown in Figure 1; Comprise water pump 1, water supply line 2, frequency converter 3, pressure sensor 4, also be provided with the flow transmitter 5 that to experience fluid flow and convert usable output signal on the water supply line 2.Wherein pressure sensor 4 is located at water supply line 2 nearly exits, and flow transmitter 5 is located on the water supply line 2 between water pump 1 and the pressure sensor 4.Also be provided with the flap valve 9 that prevents aqueous reflux on the water supply line 2, be generally positioned on the water supply line 2 between water pump 1 and the flow transmitter 5.
In addition; The control system of the utility model also comprises a PLC controller 6; The effect of PLC controller 6 is: through the measured value of pressure sensor 4; And calculate the setting value of water supply line 2 outlet pressures through the measured value of flow transmitter 5, utilize the difference of piezometry value and pressure set points to confirm the output frequency of frequency converter 3, and water pump 1 is carried out speed regulating control.In the control system, water pump 1 is connected in PLC controller 6 through frequency converter 3, and flow transmitter 5 also is connected with PLC controller 6 respectively with pressure sensor 4.
The control system also comprises and is arranged at the level sensor 8 that is connected with PLC controller 6 in the storage cistern 7, and its effect is to prevent because of the water yield in the storage cistern 7 very fewly, changes and cause water pump 1 lack of water to be done.
The utility model is controlled the output frequency of frequency converter 3, thereby water pump 1 is adjusted control through the connection between flow transmitter 5, pressure sensor 4 and the PLC controller 6, and the water system outlet pressure is changed with the variation of output.No matter realized is in water low ebb or water use peak phase; Can both guarantee that the user side pressure of supply water is constant basically; At water supply volume hour reduction system outlet pressure; Improve system outlet pressure when water supply volume is big, the unreasonable electric power resource waste that causes is set, not only guarantee quality of water supply but also save energy and reduce the cost thereby reduce the water resource loss and water pump 1 operating mode that cause because of water supply line 2 hypertonia.
Claims (4)
1. central water supply variable-frequency variable-voltage control system comprises water pump, water supply line, frequency converter and pressure sensor, it is characterized in that said water supply line is provided with the flow transmitter that can experience fluid flow and convert usable output signal to;
Also comprise measured value in the control system through pressure sensor; And the setting value that calculates the water supply line outlet pressure through the flow transmitter measured value; Utilize the difference of piezometry value and pressure set points to confirm the output frequency of frequency converter, and water pump is carried out the PLC controller of speed regulating control;
Said water pump is connected in the PLC controller through frequency converter, and said flow transmitter also is connected with the PLC controller respectively with pressure sensor.
2. central water supply variable-frequency variable-voltage according to claim 1 control system is characterized in that said control system also comprises to be arranged at the level sensor that is connected with said PLC controller in the storage cistern.
3. central water supply variable-frequency variable-voltage according to claim 1 control system is characterized in that said pressure sensor is located at the nearly exit of water supply line, and said flow transmitter is located on the water supply line between water pump and the pressure sensor.
4. central water supply variable-frequency variable-voltage according to claim 1 is controlled system, it is characterized in that said water supply line is provided with the flap valve that prevents aqueous reflux.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201177838U CN202530510U (en) | 2012-03-19 | 2012-03-19 | Frequency conversion and voltage transformation control system for centralized water supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201177838U CN202530510U (en) | 2012-03-19 | 2012-03-19 | Frequency conversion and voltage transformation control system for centralized water supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202530510U true CN202530510U (en) | 2012-11-14 |
Family
ID=47131705
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012201177838U Expired - Fee Related CN202530510U (en) | 2012-03-19 | 2012-03-19 | Frequency conversion and voltage transformation control system for centralized water supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202530510U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103074916A (en) * | 2013-02-01 | 2013-05-01 | 赵复昌 | Ultra-quiet air-control automatic variable-frequency high-rise building water supply system |
| CN103266646A (en) * | 2013-05-14 | 2013-08-28 | 江苏大学 | Variable frequency variable pressure water supply implementation method and variable frequency variable pressure water supply implementation device |
| CN104153424A (en) * | 2014-06-10 | 2014-11-19 | 青岛沈源水务科技有限公司 | Secondary water supply equipment control method and system based on model |
| CN105696649A (en) * | 2016-03-30 | 2016-06-22 | 唐若权 | Intelligent water supply system |
| CN105696650A (en) * | 2016-03-30 | 2016-06-22 | 唐若权 | Intelligent water supply system with hot water supply function |
| CN107131686A (en) * | 2017-06-08 | 2017-09-05 | 深圳达实智能股份有限公司 | The circulatory system and its energy-saving control method of multiple ontology centrifugal pump |
| CN108643278A (en) * | 2018-06-22 | 2018-10-12 | 安徽机电职业技术学院 | A kind of energy-saving Township water supply system and its water-supply control |
-
2012
- 2012-03-19 CN CN2012201177838U patent/CN202530510U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103074916A (en) * | 2013-02-01 | 2013-05-01 | 赵复昌 | Ultra-quiet air-control automatic variable-frequency high-rise building water supply system |
| CN103266646A (en) * | 2013-05-14 | 2013-08-28 | 江苏大学 | Variable frequency variable pressure water supply implementation method and variable frequency variable pressure water supply implementation device |
| CN104153424A (en) * | 2014-06-10 | 2014-11-19 | 青岛沈源水务科技有限公司 | Secondary water supply equipment control method and system based on model |
| CN105696649A (en) * | 2016-03-30 | 2016-06-22 | 唐若权 | Intelligent water supply system |
| CN105696650A (en) * | 2016-03-30 | 2016-06-22 | 唐若权 | Intelligent water supply system with hot water supply function |
| CN105696650B (en) * | 2016-03-30 | 2018-06-01 | 唐若权 | Intelligent water supply system with hot water supply |
| CN107131686A (en) * | 2017-06-08 | 2017-09-05 | 深圳达实智能股份有限公司 | The circulatory system and its energy-saving control method of multiple ontology centrifugal pump |
| CN108643278A (en) * | 2018-06-22 | 2018-10-12 | 安徽机电职业技术学院 | A kind of energy-saving Township water supply system and its water-supply control |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202530510U (en) | Frequency conversion and voltage transformation control system for centralized water supply | |
| CN201065546Y (en) | Intelligent negative pressure-free pressurizing water tank | |
| CN201347566Y (en) | Variable frequency constant-pressure water-supplying automatic control system | |
| CN210179029U (en) | Wisdom governing valve | |
| CN201844198U (en) | PCP (pump control pump) long-distance pipeline oil transfer high-efficiency energy-saving pressure stabilizing and flow adjusting system | |
| CN205999979U (en) | A kind of job site Novel variable-frequency energy-saving water supply system | |
| CN202370049U (en) | Full-automatic constant pressure energy-saving water supply device | |
| CN205369391U (en) | Water -supplying device with bidirectional compensation | |
| CN204503799U (en) | A kind of high pressure descaling water system | |
| CN206397708U (en) | A kind of constant voltage water pump energy-saving control system battery saving arrangement | |
| CN205276379U (en) | Network pressure -superposition and high flush tank unite water supply equipment | |
| CN202281044U (en) | Pressure-stabilizing system for oil transmission pipeline | |
| CN201574908U (en) | Intelligent control mine emulsion liquid pumping plant system | |
| CN207003545U (en) | A kind of water supply pump constant pressure frequency conversion speed-regulating control device | |
| CN203640000U (en) | Non-negative pressure and energy-conservation water supply device for intelligent step-pump set | |
| CN203200811U (en) | Deep well pump frequency conversion constant-voltage stabilized-voltage water supply system | |
| CN204983038U (en) | High -rise building secondary pressured water supply economizer system | |
| CN201158839Y (en) | Non-negative pressure energy-saving full-automatic variable-frequency control water-supply equipment | |
| CN201818853U (en) | Constant pressure valve | |
| CN201121347Y (en) | Full-automatic amount-variable and voltage-variable non-negative pressure water supply equipment | |
| CN201395812Y (en) | Pressure-boost current-stabilization water supplying system | |
| CN201755538U (en) | Nozzle for cooling tower spray head | |
| CN204001056U (en) | Constant-pressure variable supply equipment | |
| CN201568272U (en) | Air compressor control device | |
| CN202175991U (en) | Constant-pressure water-supplying control device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121114 Termination date: 20140319 |