CN201428581Y - Intelligent frequency-variable electricity-saving system with the same main pipe - Google Patents
Intelligent frequency-variable electricity-saving system with the same main pipe Download PDFInfo
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- CN201428581Y CN201428581Y CN2009201034599U CN200920103459U CN201428581Y CN 201428581 Y CN201428581 Y CN 201428581Y CN 2009201034599 U CN2009201034599 U CN 2009201034599U CN 200920103459 U CN200920103459 U CN 200920103459U CN 201428581 Y CN201428581 Y CN 201428581Y
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- water
- pipe
- water pump
- water supply
- frequency
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Abstract
The utility model discloses an intelligent frequency-variable electricity-saving system with the same main pipe, which comprises water supply branch pipes, a water supply main pipe connected with thewater supply branch pipes, water pumps connected with the water supply branch pipes, and a water pump control system. Two or more water supply branch pipes are connected with the same water supply main pipe, the water pump of each water supply branch pipe is provided with a frequency converter, and each frequency converter is parallelly connected with a branch formed by serially connecting an AC contactor and a thermal relay to form a water pump main control loop. The intelligent frequency-variable electricity-saving system conducts automatic detection through water pump system and sensors tocontrol the water pump main control loop, and a one-way valve is arranged in the pipeline to eliminate the problem of unbalanced pressures between the two pipelines; and the utility model has the advantages of stable water supply pressure, reduced power consumption of water pump, remarkably improved electricity-saving ratio, improved automation degree, reduced manpower requirement, and improved efficiency.
Description
Technical field
The utility model relates to a kind of female altogether pipe intelligent frequency-conversion power saving apparatus.
Background technique
Traditional many water supplying pumps system adopts man-to-man electric control system (i.e. water pump of a starter control).This way of supplying water automaticity is low, and it is on duty to need the people, and pressure of supply water can not be constant.Pressure was low when water consumption was big, can only increase a water pump artificially, to keep pressure of supply water within the specific limits.Water consumption hour can only have a water pump power frequency (50Hz) operation.But when water consumptions such as night were very little, a standing little pump guaranteed to supply water, and this moment, pressure of supply water was more unstable.Occurred many pump frequency conversions way of supplying water afterwards, many water supplying pumps system generally adopts frequency variator loop control mode.Many pump control thinkings are to drag multiplex's frequency conversion to supply water frequently in conjunction with the quantitative change of combined type unsteady flow.When small flow water situation, water pump operation of frequency variator band with the variation of water consumption, is adjusted the rotating speed of water pump; When water consumption increases, make this variable frequency pump switch to power frequency, make frequency variator drive next pump variable frequency soft start operation simultaneously.With increasing with water flow, the soft start of each water pump later on.Yet, when a pump is in the frequency conversion state, when another is in the power frequency state, because pressure imbalance, cause variable frequency pump to be subjected to backpressure, reduced the efficient of variable frequency pump, air horsepower does not become the cube relation with changes in flow rate, fail to reach maximum energy-conservation, and move in the process that power frequency operation switches, be in sliding stoppage in transit commentaries on classics mode owing to cut off rear motor in frequency conversion drive at certain motor frequency conversion, at this moment, motor is in the induction generating state, exists the inconsistent possibility of phase place of induction generating phase place and power frequency supply, causes easily in the rush of current phenomenon when power frequency is switched.
The model utility content
The utility model technical issues that need to address provide a kind of many water supplying pumps system that is used for, and are stable, energy-conservation, and the high common female pipe intelligent frequency-conversion power saving apparatus of automatic controlling level.
For addressing the above problem, technical solution adopted in the utility model is: a kind of female altogether pipe intelligent frequency-conversion power saving apparatus, the female pipe of water supply that comprises the son pipe that supplies water, the sub-pipe of connection water supply, the water pump and the control system of water pump that are connected with the son pipe that supplies water, the above water supply pipe of two-way or two-way connects the female pipe of same road water supply, the water pump that each son pipe that supplies water connects all disposes a frequency variator, every branch road parallel connection that frequency variator is all connected with A.C. contactor and thermorelay and constituted constitutes water pump control major loop.
Be provided with one-way valve in the sub-pipe of described water supply.
Be provided with flow transducer and the pressure transducer that is connected with control system of water pump in the female pipe of described water supply.
Described control system of water pump is PLC controller or single-chip computer control system.
Adopt the beneficial effect that technique scheme produced to be: basis is novel to be detected by sensor automatically by control system of water pump, the control major loop of control of pump, and one-way valve is set in pipeline, and eliminated the pressure imbalance problem between two pipelines, guaranteed the efficient of variable frequency pump, pressure of supply water is stable, reduce the water pump power consumption, significantly promoted power saving rate, improved automaticity, reduce manpower demand, improved efficient.
Description of drawings
Fig. 1 is this practical pipeline configuration structure schematic representation;
Fig. 2 is this novel two-way management and control system main loop circuit figure that supplies water.
Embodiment
Below in conjunction with accompanying drawing the utility model is done and to be described in further detail:
This novel female pipe 4 of water supply that comprises the son pipe 1 that supplies water, connects the son pipe 1 that supplies water, with son pipe 1 water pump that is connected and the control system of water pump that supply water, the son pipe 1 that wherein supplies water is provided with two-way or more than the two-way, connect the female pipe 4 of same road water supply, in son pipe 1 is supplied water on every road, one-way valve 2 is set all, one-way valve 2 is arranged in the pipeline of water pump water outlet side, in female pipe 4 that supplies water, be provided for detecting the sensor-pressure transducer and the flow transducer 3 of hydraulic pressure and flow, two sensors all is connected on the control system of water pump, is used for detecting and control pressure of supply water and flow.The embodiment that this is novel to provide a two-way to supply water sub-pipe, its structure as shown in Figure 1.
The water pump that each son pipe that supplies water connects all disposes a frequency variator, every branch road parallel connection that frequency variator is all connected with A.C. contactor and thermorelay and constituted, constitute water pump control major loop, this novel main loop circuit figure that provides two-way to supply water son pipe (two water pumps), as shown in Figure 2, frequency variator series connection dragging motor M1 wherein, frequency variator input end and output terminal be series contactor K1 respectively, K2, bypass A.C. contactor K3 is with in parallel with the frequency variator loop again after thermorelay RJ1 connects, another frequency variator series connection drags another motor M 2, frequency variator input end and output terminal be series contactor K4 respectively, K5, another bypass A.C. contactor K6 constitutes the control major loop with in parallel with the frequency variator loop again after another thermorelay RJ2 connects.The control system of water pump of control loop can adopt the PLC controller, also can adopt single-chip computer control system.
The changeable frequency system saving electricity principle of this novel relative holder is as follows:
With double pump (same model) is example, according to the approximate ratio law of centrifugal pump as can be known:
Q
1/Q
2＝n
1/n
2；
P
1/P
2＝(n
1/n
2)
2；Pa
1/Pa
2＝(n
1/n
2)
3。
Q in the formula
1, P
1, Pa
1-rotation speed n
1The time flow, pressure and air horsepower;
Q
2, P
2, Pa
2-rotation speed n
2The time flow, pressure and air horsepower;
Suppose that the actual demand outlet pressure is 1MPa, single pump power frequency 50Hz pressure is 0.8MPa, corresponding power is 15kw, original system just needs a pump work under the power frequency state, another is operated under the frequency conversion state, and pressure is 0.2MPa, according to proportionality law, frequency conversion is under the 25Hz state as can be known, 0.8/0.2=(50/25)
2, power is 1.875kw, 15/1.875=(50/25)
3, total output is 1.875+15=16.875kw.This is novel to detect automatically by controller, makes double pump that 0.5MPa pressure is provided separately, i.e. double pump about 40Hz that works simultaneously, 0.8/0.5 ≈ (50/40)
2, double pump power is 7.4Kw simultaneously, 15/7.4 ≈ (50/40)
3Total output is 14.8Kw, compares original system, and power saving rate improves 13%, if many pumps, power saving rate will be higher.
In the practical application, control system of water pump is by pressure, the traffic sampling of female pipe outlet altogether, through regulating with setting value comparison operation, PID, the a plurality of motor variable-frequency speed-regulating systems of output control, a cover frequency conversion is only opened in control when demand is low, is starting a frequency conversion when demand is high, and former frequency conversion system is reduced, make it under the prerequisite of requirements of support pressure and flow, keep maximum power saving rate always.Be equipped with an one-way valve in the pipe network in each water pump water outlet lateral line, can guarantee like this when only opening a cover system, all the other systems can backwater, do not have back-pressure, when opening two covers or above system, guarantee pressure balance, do not have circulation, ensure the variable frequency pump maximal efficiency.Bypass is set and is guaranteed can automatically switch to power frequency, thereby not influence water requirements when frequency converter failure, and internal system is provided with delay protection during switching, prevents inrush current.When thermorelay prevents power frequency, the loop overload.
Claims (4)
1, a kind of female altogether pipe intelligent frequency-conversion power saving apparatus, the female pipe of water supply that comprises the son pipe that supplies water, the sub-pipe of connection water supply, the water pump and the control system of water pump that are connected with the son pipe that supplies water, it is characterized in that: the above water supply pipe of two-way or two-way connects the female pipe of same road water supply, the water pump that each son pipe that supplies water connects all disposes a frequency variator, every branch road parallel connection that frequency variator is all connected with A.C. contactor and thermorelay and constituted constitutes water pump control major loop.
2, female altogether pipe intelligent frequency-conversion power saving apparatus according to claim 1 is characterized in that being provided with one-way valve in the sub-pipe of described water supply.
3, female altogether pipe intelligent frequency-conversion power saving apparatus according to claim 1 is characterized in that being provided with in the female pipe of described water supply flow transducer and the pressure transducer that is connected with control system of water pump.
4, female altogether pipe intelligent frequency-conversion power saving apparatus according to claim 1 is characterized in that described control system of water pump is PLC controller or single-chip computer control system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201034599U CN201428581Y (en) | 2009-06-29 | 2009-06-29 | Intelligent frequency-variable electricity-saving system with the same main pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201034599U CN201428581Y (en) | 2009-06-29 | 2009-06-29 | Intelligent frequency-variable electricity-saving system with the same main pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201428581Y true CN201428581Y (en) | 2010-03-24 |
Family
ID=42032318
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201034599U Expired - Fee Related CN201428581Y (en) | 2009-06-29 | 2009-06-29 | Intelligent frequency-variable electricity-saving system with the same main pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201428581Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103016322A (en) * | 2011-09-21 | 2013-04-03 | 常州苏控自动化设备有限公司 | Water pump/fan energy-saving device |
| CN106609745A (en) * | 2015-10-21 | 2017-05-03 | 上海连成（集团）有限公司 | Double-variable-frequency constant-pressure water supply control system and method |
| CN107193301A (en) * | 2017-07-26 | 2017-09-22 | 上海中车汉格船舶与海洋工程有限公司 | The energy-saving control system and method for ship sea water pump |
| CN108507245A (en) * | 2018-04-04 | 2018-09-07 | 重庆大学 | A kind of the full-automatic circulating cooling control system and control method of nesting closed loop |
-
2009
- 2009-06-29 CN CN2009201034599U patent/CN201428581Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103016322A (en) * | 2011-09-21 | 2013-04-03 | 常州苏控自动化设备有限公司 | Water pump/fan energy-saving device |
| CN106609745A (en) * | 2015-10-21 | 2017-05-03 | 上海连成（集团）有限公司 | Double-variable-frequency constant-pressure water supply control system and method |
| CN106609745B (en) * | 2015-10-21 | 2020-04-03 | 上海连成（集团）有限公司 | Double-frequency-conversion constant-pressure water supply control system and control method |
| CN107193301A (en) * | 2017-07-26 | 2017-09-22 | 上海中车汉格船舶与海洋工程有限公司 | The energy-saving control system and method for ship sea water pump |
| CN108507245A (en) * | 2018-04-04 | 2018-09-07 | 重庆大学 | A kind of the full-automatic circulating cooling control system and control method of nesting closed loop |
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Legal Events
| Date | Code | Title | Description |
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| 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: 20100324 Termination date: 20110629 |