CN204941881U - A kind of constant pressure water supply automatical control system - Google Patents
A kind of constant pressure water supply automatical control system Download PDFInfo
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- CN204941881U CN204941881U CN201520588094.9U CN201520588094U CN204941881U CN 204941881 U CN204941881 U CN 204941881U CN 201520588094 U CN201520588094 U CN 201520588094U CN 204941881 U CN204941881 U CN 204941881U
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- controller
- frequency variator
- water supply
- control system
- constant pressure
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- Control Of Non-Positive-Displacement Pumps (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
The utility model relates to a kind of constant pressure water supply automatical control system, comprise stabilized power supply, controller, frequency variator, pressure transmitter, water pump assembly and circuit protection device, described output end of stabilized voltage supply and controller, water pump assembly is connected with the input end of frequency variator, described water pump assembly comprises diverter switch group, at least one pump motor and electric machine controller, described diverter switch group is connected with the input end of electric machine controller, the output terminal of described frequency variator is connected with diverter switch group, the signal input part of described controller is connected with the signal output part of pressure transmitter, the signal output part of described controller is connected with the input end of frequency variator, described circuit protection device and controller, frequency variator, pressure transmitter and water pump assembly are connected.Native system can regulate water pump by programmable controller PLC programming, and cut the waste water resources, shortens water supply time, saving power.
Description
Technical field
The utility model relates to pipe network water supply technical field, specifically a kind of varying speed and constant pressure feed water automatical control system for frequency-changing water supply device.
Background technique
Due to China's water resources and power shortage, therefore high-rise civil construction, the quality of water supply of the public pipe network such as civic building and industrial cycle and important, this situation shows particularly evident when water use peak and ebb.Such as when water use peak, because the delivery volume of water is lower than the demand of user, thus hydraulic pressure reduces the situation occurring that supply falls short of demand.When by water ebb, because the delivery volume of water is higher than the demand of user, thus hydraulic pressure raises and occurs easy situation, at this moment will cause energy dissipation, even there will be the damage of the watering equipments such as water pipe explosion.
Common pipe network water supply mode comprises the direct way of supplying water of constant speed pump, constant speed pump water tower water-feeding mode, Jet injector cistern water supply mode, constant speed pump high-level tank water mode, constant speed pump airpressured pitcher mode and frequency modulation water supply mode etc., most widely used in frequency modulation water supply mode at present.Constant pressure water supply system is for setup parameter with pipe network water pressure (or user's water flow), automatically the rotating speed of pump motor is regulated by the output frequency of Controlled by Programmable Controller frequency variator, realize the closed-loop adjustment of pipe network water pressure, make water system automatically horizontal surely in the force value set: when namely water consumption increases, frequency raises, pump rotary speed is accelerated, the corresponding increase of water output; When water consumption reduces, frequency reduces, and pump rotary speed slows down, and water output is corresponding reduction also, this ensures that theres the requirement of water application efficiency user to hydraulic pressure and the water yield, reaches the object improving water supply quality and water application efficiency simultaneously.Adopt such water system not need to build elevated tank and water tower, water quality no secondary pollution is a kind of desirable modern architecture water system.
But, existing frequency-changing water supply device great majority adopt the way of supplying water of separate unit frequency variator dragging multiple water pump, such existence weakness is exactly easily produce pressure surge, and actual pressure often has hysteresis quality to control action, and frequency variator also has certain hysteresis effect when controlling pump rotary speed.When employing frequency variator fixing dragging separately water pump, can realize soft start and soft stop, effectively can eliminate again the water hammer of water pump, but cost is too high, especially when also needing to add reserve pump, cost is higher.In addition, existing frequency-changing water supply device also has the mode adopting dual frequency converter simultaneously to start, and so also there is frequency variator efficiency low, the defect wasted energy.
Summary of the invention
The utility model is just for the technical problem existed in prior art; a kind of constant pressure water supply automatical control system is provided; its structure is simple; the output frequency of PLC programming Control frequency variator can be passed through thus the rotating speed of automatic adjustment pump motor; realize the closed-loop adjustment of pipe network water pressure, and by circuit protection device, overload protection is carried out to automatical control system, adopt a frequency variator to realize circulation soft start and soft stop to multiple stage pump motor; ensure stationarity during device start, extension device element working life.
To achieve these goals, the technical solution adopted in the utility model is, a kind of constant pressure water supply automatical control system, comprise stabilized power supply, controller, frequency variator, pressure transmitter, water pump assembly and circuit protection device, described output end of stabilized voltage supply and controller, water pump assembly is connected with the input end of frequency variator, described water pump assembly comprises diverter switch group, at least one pump motor and electric machine controller, described diverter switch group is connected with the input end of electric machine controller, the output terminal of described frequency variator is connected with diverter switch group, the signal input part of described controller is connected with the signal output part of pressure transmitter, the signal output part of described controller is connected with the input end of frequency variator, described circuit protection device and controller, frequency variator, pressure transmitter and water pump assembly are connected.
Improve as one of the present utility model, this system also comprises soft initiator, and the input end of described soft initiator is connected with the output terminal of circuit control device with the signal output part of controller, and the output terminal of soft initiator is connected with diverter switch group.When frequency variator outlet fault, system will lose automatic water-supply function, at this moment realize constant pressure water supply by Bypass Control, and soft initiator comes into operation after can overhauling during this period.
Improve as one of the present utility model, described controller comprises programmable controller PLC and human-computer interaction interface, the input end of programmable controller PLC is connected with the signal output part of pressure transmitter with human-computer interaction interface, and the output terminal of programmable controller PLC is connected with the input end of frequency variator, soft initiator.Human-computer interaction interface can be monitored the state of whole automatical control system and the setting of automatical control system relevant parameter in real time, and programmable controller PLC collection receives and process the data from pressure transmitter, and sending human-computer interaction interface and frequency variator to after data being processed, frequency variator changes output frequency according to the signal that programmable controller PLC is given.
Improve as one of the present utility model, described pressure transmitter connects the 24V DC electrical source that its work promising is powered.
Improve as one of the present utility model, described programmable controller PLC adopts the PLC with RS485 communication interface.
Improve as one of the present utility model, described programmable controller PLC adopts Siemens S7-200PLC, and Siemens S7-200PLC carries RS485 communication interface, therefore easy to use, quick.
Improve as one of the present utility model, described frequency variator adopts ABB frequency variator, and it carries out communication by RS485 communication interface and PLC.
Improve as one of the present utility model, described water pump assembly comprises 1 ~ 5 pump motor, and the quantity of described electric machine controller and pump motor is consistent.
Relative to prior art, in this constant pressure water supply automatical control system, adopt the frequency control of motor speed method of operation, the change of hydraulic pressure according to actual needs can automatically regulate rotating speed or the plus-minus pump of pump motor, realize constant pressure water supply, energy-saving and cost-reducing; System takes water pump rotation work, extends the working life of water pump and pump motor.Still automatically can run after frequency converter failure, the uninterrupted water supply of basic guarantee, adopt the mode of programmable controller PLC and inverter communication to control frequency variator simultaneously and run, there is certain advance.Its structure is simple, and can regulate water pump by programmable controller PLC programming, cut the waste water resources, shortens water supply time, saving power.
Accompanying drawing explanation
Fig. 1 is structure principle chart of the present utility model.
Embodiment
In order to deepen understanding and cognition of the present utility model, below in conjunction with accompanying drawing the utility model be further described and introduce.
As shown in Figure 1, a kind of constant pressure water supply automatical control system, comprises stabilized power supply, controller, frequency variator, pressure transmitter, water pump assembly, circuit protection device and soft initiator.Described pressure transmitter adopts independent 24V DC electrical source to power.The output terminal of described stabilized power supply is connected with the input end of frequency variator with controller, water pump assembly.Described water pump assembly comprises diverter switch group, five pump motors and electric machine controller, and described diverter switch group is connected with the input end of electric machine controller, and every platform pump motor all configures an electric machine controller.Described frequency variator is connected with diverter switch group with the output terminal of soft initiator.Described controller comprises programmable controller PLC and human-computer interaction interface, the input end of programmable controller PLC is connected with the signal output part of pressure transmitter with human-computer interaction interface, and the output terminal of programmable controller PLC is connected with the input end of frequency variator, soft initiator.Described programmable controller PLC adopts the PLC with RS485 communication interface.Described circuit protection device is all connected with controller, frequency variator, pressure transmitter, soft initiator and water pump assembly.
Preferably, described programmable controller PLC adopts Siemens S7-200PLC, and Siemens S7-200PLC carries RS485 communication interface, easy to use, receives fast and transmit data.
Preferably, described frequency variator adopts ABB frequency variator, and it carries out communication by RS485 communication interface and PLC.
The automaticity of whole constant pressure water supply automatical control system is high, adopt frequency control of motor speed, circulate and softly open technology; circuit protection device is arranged in main loop and control loop; for monitoring the electrical failures such as the overload of whole automatical control system, under-voltage, short circuit, phase sequence; multiple protective and specific aim protection are carried out to automatical control system, makes automatical control system safety and reliability.Circulation is soft opens to adopt frequency variator to carry out pump motor, ensure that stationarity during device start, extends the working life of equipment component, adopts diverter switch group as mutual self-shileding system, mutual interference when effectively avoiding equipment normally to run.
System take ductwork pressure as setup parameter, by the output frequency of programmable controller PLC outputting standard SC sigmal control ABB frequency variator, thus automatically regulate the rotating speed of variable frequency pump motor, realize the closed-loop adjustment of pipe network water pressure, make water system automatic constant-pressure in the force value set: when namely water consumption increases, frequency raises, and pump rotary speed is accelerated, the corresponding increase of water output; When water consumption reduces, frequency reduces, and pump rotary speed slows down, the corresponding reduction of water output, so just meets the requirement of user to hydraulic pressure and the water yield, reaches the object improving water supply quality and water application efficiency simultaneously.
It should be noted that above-described embodiment, be not used for limiting protection domain of the present utility model, equivalents done on the basis of technique scheme or the alternative scope all falling into the utility model claim and protect.
Claims (8)
1. a constant pressure water supply automatical control system, it is characterized in that: comprise stabilized power supply, controller, frequency variator, pressure transmitter, water pump assembly and circuit protection device, described output end of stabilized voltage supply and controller, water pump assembly is connected with the input end of frequency variator, described water pump assembly comprises diverter switch group, at least one pump motor and electric machine controller, described diverter switch group is connected with the input end of electric machine controller, the output terminal of described frequency variator is connected with diverter switch group, the signal input part of described controller is connected with the signal output part of pressure transmitter, the signal output part of described controller is connected with the input end of frequency variator, described circuit protection device and controller, frequency variator, pressure transmitter and water pump assembly are connected.
2. a kind of constant pressure water supply automatical control system as claimed in claim 1, it is characterized in that, this system also comprises soft initiator, and the input end of described soft initiator is connected with the output terminal of circuit control device with the signal output part of controller, and the output terminal of soft initiator is connected with diverter switch group.
3. a kind of constant pressure water supply automatical control system as claimed in claim 2, it is characterized in that, described controller comprises programmable controller PLC and human-computer interaction interface, the input end of programmable controller PLC is connected with the signal output part of pressure transmitter with human-computer interaction interface, and the output terminal of programmable controller PLC is connected with the input end of frequency variator, soft initiator.
4. a kind of constant pressure water supply automatical control system as described in claim 1 or 3, is characterized in that, described pressure transmitter connects the 24V DC electrical source that its work promising is powered.
5. a kind of constant pressure water supply automatical control system as claimed in claim 3, is characterized in that, described programmable controller PLC adopts the PLC with RS485 communication interface.
6. a kind of constant pressure water supply automatical control system as claimed in claim 5, is characterized in that, described programmable controller PLC adopts Siemens S7-200PLC.
7. a kind of constant pressure water supply automatical control system as described in claim 1 or 3, is characterized in that, described frequency variator adopts ABB frequency variator, and it carries out communication by RS485 communication interface and PLC.
8. a kind of constant pressure water supply automatical control system as claimed in claim 1, is characterized in that, described water pump assembly comprises 1 ~ 5 pump motor, and the quantity of described electric machine controller and pump motor is consistent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520588094.9U CN204941881U (en) | 2015-08-07 | 2015-08-07 | A kind of constant pressure water supply automatical control system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520588094.9U CN204941881U (en) | 2015-08-07 | 2015-08-07 | A kind of constant pressure water supply automatical control system |
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| CN204941881U true CN204941881U (en) | 2016-01-06 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106523339A (en) * | 2016-12-22 | 2017-03-22 | 杭州杭开新能源科技股份有限公司 | Direct-connection pressurizing water supply unit and pump-adding same-frequency operation control method |
| CN107237369A (en) * | 2017-06-28 | 2017-10-10 | 安徽舜禹水务股份有限公司 | A kind of human-computer interaction interface system for secondary water supply system |
| CN107956458A (en) * | 2016-10-18 | 2018-04-24 | 陕西吉特安全科技有限公司 | A kind of energy saving flood pattern of intelligent control |
| CN108547760A (en) * | 2018-04-19 | 2018-09-18 | 温志军 | Frequency follow-up control method for lift pump of water treatment |
| CN112928897A (en) * | 2019-11-21 | 2021-06-08 | 惠州城市职业学院(惠州商贸旅游高级职业技术学校) | Frequency converter, water pump and constant-pressure water supply system |
-
2015
- 2015-08-07 CN CN201520588094.9U patent/CN204941881U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107956458A (en) * | 2016-10-18 | 2018-04-24 | 陕西吉特安全科技有限公司 | A kind of energy saving flood pattern of intelligent control |
| CN106523339A (en) * | 2016-12-22 | 2017-03-22 | 杭州杭开新能源科技股份有限公司 | Direct-connection pressurizing water supply unit and pump-adding same-frequency operation control method |
| CN107237369A (en) * | 2017-06-28 | 2017-10-10 | 安徽舜禹水务股份有限公司 | A kind of human-computer interaction interface system for secondary water supply system |
| CN108547760A (en) * | 2018-04-19 | 2018-09-18 | 温志军 | Frequency follow-up control method for lift pump of water treatment |
| CN108547760B (en) * | 2018-04-19 | 2019-12-31 | 温志军 | Frequency follow-up control method for lift pump of water treatment |
| CN112928897A (en) * | 2019-11-21 | 2021-06-08 | 惠州城市职业学院(惠州商贸旅游高级职业技术学校) | Frequency converter, water pump and constant-pressure water supply system |
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| 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: 20160106 Termination date: 20210807 |