CN203849623U - Constant-voltage water supply control system - Google Patents
Constant-voltage water supply control system Download PDFInfo
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- CN203849623U CN203849623U CN201320784834.7U CN201320784834U CN203849623U CN 203849623 U CN203849623 U CN 203849623U CN 201320784834 U CN201320784834 U CN 201320784834U CN 203849623 U CN203849623 U CN 203849623U
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- water supply
- water
- frequency converter
- control system
- pump
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Abstract
The utility model discloses a constant-voltage water supply control system, comprising a water supply control host, a programmable logic controller, a frequency converter, an execution mechanism and a pressure sensor. The execution mechanism comprises an electric control switching assembly and at least three groups of water pump sets. The water supply control host is in communication control with the programmable logic controller. Each group of water pump set comprises a speed regulation pump and a constant-speed pump connected in parallel with a water supply pipe. The frequency converter is in driving connection with the speed regulation pump in each group of water pump set. The water pump set is connected with the electric control switching assembly, and is switched to control by other working modes. The constant-voltage water supply control system provided by the utility model has the advantages that, the speed regulation pump and the constant-speed pump are combined for water supply in a constant voltage, energy saving effect is substantial and service life is long.
Description
Technical field
The utility model relates to a kind of water system, specifically refers to a kind of constant pressure water supply control system.
Background technology
The fields such as supply water in traditional building water supply, fire fighting supply, gardens, agricultural water supply, generally all adopt water tower, elevated tank or air pressure mode to supply water.This mode exists energy consumption high, and cannot maintain water pressure invariableness, and, in the time that hydraulic pressure is low, normally anhydrous situation even appears in water, and hydraulic pressure will cause the waste of the energy when high.
In recent years, due to electronic technology and computer-controlled developing rapidly and the enhancing day by day of awareness of saving energy, the application of RHVC was more and more extensive, and RHVC starts to be applied in industry and civilian water system.But in prior art, its water pump all adopts governor impeller to coordinate frequency converter to carry out pressure adjusting, this mode, in the situation that water consumption increases, governor impeller cannot respond fast, thereby cause maximum water supply capacity deficiency.
Summary of the invention
The purpose of this utility model is the shortcoming and defect existing in order to overcome prior art, and a kind of good energy-conserving effect is provided, and stable equipment operation is reliable, the reliable constant pressure water supply control system of pressure flexible adjustment.
For achieving the above object, the technical solution of the utility model is to include water supply main control system, PLC controller, frequency converter, topworks and pressure transducer, described topworks includes automatically controlled changeover module and at least 3 group water pump groups, described water supply main control system Control on Communication PLC controller, this PLC controller control linkage frequency converter and automatically controlled changeover module, described pressure transducer is arranged at in water end (W.E.) supply channel, for detection of using water end (W.E.) hydraulic pressure, the output signal input of this pressure transducer is connected on PLC controller, every group of described water pump group includes governor impeller and the constant speed pump on supply channel connected with each other, described frequency converter drives and is connected with the governor impeller in every group of water pump group, described water pump group is connected on automatically controlled changeover module, and carry out switching controls by its mode of operation.By this setting, the mode that adopts governor impeller and constant speed pump to combine, and utilize automatically controlled changeover module to carry out switching controls, wherein governor impeller is by Frequency Converter Control, the water pump that can carry out frequency conversion adjustment, in order to change the rotating speed of motor according to the variation of water consumption, to maintain the water pressure invariableness of pipe network.And once occur that water consumption increases, cannot maintain hydraulic pressure by governor impeller time, got involved fast by change-over switch control constant speed pump, and with specific power frequency running, maintain hydraulic pressure, therefore, compared to prior art, the utlity model has pressure and maintain the advantage of good stability.
Further arranging is that described automatically controlled changeover module includes contactor, protective relay and switch.
Further arranging is that described pressure transducer is resistance-type pressure transmitter or pressure unit.
Further arrange is to be also connected in parallel to power indicating circuit, electric motor protecting indicating circuit, frequency converter holding circuit and the water pump group condition indication circuit with pilot lamp on described PLC controller; described water supply main control system includes housing, and the pilot lamp of above-mentioned power indicating circuit, electric motor protecting indicating circuit, frequency converter holding circuit and water pump group condition indication circuit is arranged on the outside surface of housing.
In sum, the utility model has the advantages that: carry out constant pressure water supply with the combination of governor impeller and constant speed pump, energy-saving effect is remarkable, every water pump is carried out to soft start, starting current can be from zero to motor rated current, reduce starting current and the impact of electrical network has been reduced to the rotating speed impact that starts the large inertia of inertia to equipment simultaneously, extended the serviceable life of equipment.
Below in conjunction with specification drawings and specific embodiments, the utility model is described further.
Brief description of the drawings
Fig. 1 the utility model embodiment systematic schematic diagram;
Fig. 2 the utility model embodiment circuit layout;
The front view of Fig. 3 the utility model embodiment water supply main control system.
Embodiment
Below by embodiment, the utility model is specifically described, only for the utility model is further described, can not be interpreted as the restriction to the utility model protection domain.
Embodiment of the present utility model as Figure 1-3, include water supply main control system 1, PLC controller 2, frequency converter 3, topworks and pressure transducer 4, described topworks includes 5 and 3 groups of water pump groups 6 of automatically controlled changeover module, described water supply main control system 1 Control on Communication PLC controller 2, this PLC controller of the present embodiment preferably adopts the controller of the PLC224 model of Siemens, this frequency converter usually adopts analog quantity control mode, this need adopt the analog quantity control module of PLC, the analog input termination of this module is received the simulating signal that pressure unit is sent here, output terminal is sent through set-point and value of feedback relatively and the analog quantity control signal drawing after PID processes, and the variation of signal changes the output frequency of frequency converter according to this.
In addition, the present embodiment this PLC controller 2 control linkage frequency converters 3 and automatically controlled changeover module 5, described pressure transducer 4 is arranged at in water end (W.E.) supply channel, for detection of using water end (W.E.) hydraulic pressure, the output signal input of this pressure transducer is connected on PLC controller 2, pressure transducer 4 described in the present embodiment is preferably resistance-type pressure transmitter or pressure unit, every group of described water pump group 6 includes governor impeller and the constant speed pump on supply channel connected with each other, described frequency converter 3 drives and is connected with the governor impeller in every group of water pump group, described water pump group is connected on automatically controlled changeover module 5, and carry out switching controls by its mode of operation.As shown in Figure 2, provide a kind of layout of automatically controlled changeover module 5, it includes contactor, protective relay and switch, and certainly, automatically controlled changeover module 5, as ripe at present electric fittings, also can directly be bought assembling from the market.
In addition; on PLC controller 2 described in the present embodiment, be also connected in parallel to power indicating circuit 71, electric motor protecting indicating circuit 72, frequency converter holding circuit 73 and water pump group condition indication circuit 74 with pilot lamp; described water supply main control system includes housing, and the pilot lamp of above-mentioned power indicating circuit, electric motor protecting indicating circuit, frequency converter holding circuit and water pump group condition indication circuit is arranged on the outside surface of housing.
Principle of work of the present utility model is principle of work
The air switch that closes, regulate, and the given signal of output frequency is to frequency converter according to the deviation of pressure set points and pressure actual value.The rotating speed that frequency converter is controlled water pump according to the given signal of frequency and pre-set acceleration time, with within ensureing that hydraulic pressure remains on the upper and lower limit scope of pressure set points, is realized constant voltage control.Frequency converter arrives the upper limit in running frequency simultaneously, can give PLC by frequency arriving signal, whether PLC arrives the signal of the upper limit according to the running frequency of the upper and lower limit signal of ductwork pressure and frequency converter, judge whether to start the 2nd pump (or the 3rd pump) by program.When frequency converter running frequency reaches upper frequency limit value, and keep a period of time, PLC can switch to power frequency operation by current converting operation pump, and starts rapidly lower 1 pump frequency conversion operation.The detection signal that now PID can continue by being sent here by distance-transmission pressure gauge is analyzed, calculates, is judged, further controls the running frequency of frequency converter, make pipe press remain on the upper and lower limit deviation range of pressure set points within.
Increase pump work process: it is l, 2,3 pumps that supposition increases pump order.When beginning, 1 pump motor first drops into speed governing operation under PLC controls, and its travelling speed is regulated by frequency converter.In the time that pressure of supply water is less than pressure prevalue, frequency converter output frequency raises, and pump rotary speed rises, otherwise declines.When the output frequency of frequency converter reaches the upper limit, and after stable operation, if pressure of supply water does not still reach prevalue, need to enter the pump process that increases.The electromagnetic switch under the logic control of PLC, 1 pump motor being connected with frequency converter disconnects, and 1 pump motor is switched to power frequency operation, and frequency converter is connected with 2 pump motors simultaneously, controls 2 pumps and drops into speed governing operation.If also do not arrive setting value, continue, according to above step, 2 pumps are switched to power frequency operation, control 3 pumps and drop into converting operation.
Subtract pump work process: supposition subtracts pump order and is followed successively by 3,2,1 pump.In the time that pressure of supply water is greater than prevalue; frequency converter output frequency reduces; water pump speed declines; when the output frequency of frequency converter reaches lower limit; and after stable operation a period of time, the water pump of Frequency Converter Control is shut down, if pressure of supply water is still greater than prevalue; next water pump is switched to frequency converter timing operation by power frequency operation, and continues to subtract pump work process.If in the time that night, water was few, when last main pump moving is during in slow running, if pressure of supply water is still greater than setting value, shuts down and start auxiliary pump and drop into speed governing operation, thereby reach energy-saving effect.
Claims (3)
1. a constant pressure water supply control system, it is characterized in that: include water supply main control system, PLC controller, frequency converter, topworks and pressure transducer, described topworks includes automatically controlled changeover module and at least 3 group water pump groups, this PLC controller control linkage frequency converter and automatically controlled changeover module, described pressure transducer is arranged at in water end (W.E.) supply channel, for detection of using water end (W.E.) hydraulic pressure, the output signal input of this pressure transducer is connected on PLC controller, every group of described water pump group includes governor impeller and the constant speed pump on supply channel connected with each other, described frequency converter drives and is connected with the governor impeller in every group of water pump group, described water pump group is connected on automatically controlled changeover module, and carry out switching controls by its mode of operation, on described PLC controller, be also connected in parallel to the power indicating circuit with pilot lamp, electric motor protecting indicating circuit, frequency converter holding circuit and water pump group condition indication circuit, described water supply main control system includes housing, above-mentioned power indicating circuit, electric motor protecting indicating circuit, the pilot lamp of frequency converter holding circuit and water pump group condition indication circuit is arranged on the outside surface of housing, this PLC controller adopts the controller of the PLC224 model of Siemens.
2. a kind of constant pressure water supply control system according to claim 1, is characterized in that: described automatically controlled changeover module includes contactor, protective relay and switch.
3. a kind of constant pressure water supply control system according to claim 1, is characterized in that: described pressure transducer is resistance-type pressure transmitter or pressure unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320784834.7U CN203849623U (en) | 2013-12-02 | 2013-12-02 | Constant-voltage water supply control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320784834.7U CN203849623U (en) | 2013-12-02 | 2013-12-02 | Constant-voltage water supply control system |
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| Publication Number | Publication Date |
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| CN203849623U true CN203849623U (en) | 2014-09-24 |
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| CN201320784834.7U Expired - Fee Related CN203849623U (en) | 2013-12-02 | 2013-12-02 | Constant-voltage water supply control system |
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| CN (1) | CN203849623U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104314140A (en) * | 2014-11-11 | 2015-01-28 | 宁夏嘉翔自控技术有限公司 | Control device for water well pump of water well PLC controlled tap water supply system |
| CN104452895A (en) * | 2014-11-11 | 2015-03-25 | 宁夏嘉翔自控技术有限公司 | Central control device of water well PLC controlled taper water supply system |
| CN104452896A (en) * | 2014-11-11 | 2015-03-25 | 宁夏嘉翔自控技术有限公司 | Device for controlling water well water pump of tap water supply system through central PLC |
| CN105464170A (en) * | 2015-11-23 | 2016-04-06 | 嘉兴职业技术学院 | Livestock breeding water supply system |
| CN106351289A (en) * | 2016-08-30 | 2017-01-25 | 上海新时达电气股份有限公司 | Pump dispatching method for multi-split water supply system |
| CN108385780A (en) * | 2018-03-06 | 2018-08-10 | 广州市百福电气设备有限公司 | Water management system, water-supply control, device and variable frequency pump |
| CN109763542A (en) * | 2019-03-06 | 2019-05-17 | 沈阳金安科技有限公司 | A kind of the intelligence zero load halt control method and device of constant pressure water supply frequency conversion system |
| CN112000143A (en) * | 2020-08-07 | 2020-11-27 | 河北利万信息科技有限公司 | Method for controlling water supply pressure by operation feedback signal in PID control |
-
2013
- 2013-12-02 CN CN201320784834.7U patent/CN203849623U/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104314140A (en) * | 2014-11-11 | 2015-01-28 | 宁夏嘉翔自控技术有限公司 | Control device for water well pump of water well PLC controlled tap water supply system |
| CN104452895A (en) * | 2014-11-11 | 2015-03-25 | 宁夏嘉翔自控技术有限公司 | Central control device of water well PLC controlled taper water supply system |
| CN104452896A (en) * | 2014-11-11 | 2015-03-25 | 宁夏嘉翔自控技术有限公司 | Device for controlling water well water pump of tap water supply system through central PLC |
| CN105464170A (en) * | 2015-11-23 | 2016-04-06 | 嘉兴职业技术学院 | Livestock breeding water supply system |
| CN106351289A (en) * | 2016-08-30 | 2017-01-25 | 上海新时达电气股份有限公司 | Pump dispatching method for multi-split water supply system |
| CN108385780A (en) * | 2018-03-06 | 2018-08-10 | 广州市百福电气设备有限公司 | Water management system, water-supply control, device and variable frequency pump |
| CN109763542A (en) * | 2019-03-06 | 2019-05-17 | 沈阳金安科技有限公司 | A kind of the intelligence zero load halt control method and device of constant pressure water supply frequency conversion system |
| CN109763542B (en) * | 2019-03-06 | 2021-03-23 | 沈阳金安科技有限公司 | Intelligent no-load shutdown control method and device for constant-pressure water supply frequency conversion system |
| CN112000143A (en) * | 2020-08-07 | 2020-11-27 | 河北利万信息科技有限公司 | Method for controlling water supply pressure by operation feedback signal in PID control |
| CN112000143B (en) * | 2020-08-07 | 2022-10-21 | 河北利万信息科技有限公司 | Method for controlling water supply pressure by operation feedback signal in PID control |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140924 Termination date: 20191202 |