CN203770109U - Water pump control device for constant pressure water supply - Google Patents
Water pump control device for constant pressure water supply Download PDFInfo
- Publication number
- CN203770109U CN203770109U CN201320887531.8U CN201320887531U CN203770109U CN 203770109 U CN203770109 U CN 203770109U CN 201320887531 U CN201320887531 U CN 201320887531U CN 203770109 U CN203770109 U CN 203770109U
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- water
- frequency variator
- microprocessor
- connects
- electric machine
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 120
- 230000011664 signaling Effects 0.000 claims description 9
- 230000004044 response Effects 0.000 abstract description 2
- 230000005059 dormancy Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 3
- 238000004378 air conditioning Methods 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000003973 irrigation Methods 0.000 description 2
- 230000002262 irrigation Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 239000003643 water by type Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 208000015181 infectious disease Diseases 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
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- Control Of Positive-Displacement Pumps (AREA)
Abstract
The utility model relates to the field of water pump control equipment, and particularly discloses a water pump control device for constant pressure water supply. The water pump control device for constant pressure water supply comprises three-phase alternating current power supplies (1), three-phase motors (2) and at least two water pumps (3), and is characterized by also comprising a frequency converter (4), a water pressure sensor (5) and a microprocessor (6), wherein water outlets of the water pumps (3) are connected with a water main (10); each water pump (3) is driven by the corresponding three-phase motor (2); a rectifier (41) and an inverter (42) are arranged in the frequency converter (4); the water pressure sensor (5) is arranged in the water main (10) behind the water outlets of the water pumps (3); the signal output end of the water pressure sensor (5) is connected with the microprocessor (43) through a signal line. The device is accurate in control, quick in response, high in energy resource utilization rate, safe, reliable and wide in application range.
Description
Technical field
The utility model relates to the control apparatus field of pump, is specially a kind of pump control unit for constant pressure water supply.
Background technique
Water system is widely used facility in productive life, and stable for what keep supplying water, increasing occasion has the requirement of constant pressure water supply.The mode of traditional constant pressure water supply is to adopt the facilities such as water tower, elevated tank, barometric tank to realize, this controlling method exists that power consumption is high, the large occupation of land of the complicated volume of facility is many, have water hammer effect to affect the water pump life-span, have the defects such as secondary pollution, and this has just limited the use of constant pressure water supply.
Model utility content
In order to overcome the defect of prior art, the water pump control apparatus that provide that a kind of utilization rate of electrical is high, facility is simple, extend the water pump life-span, quality of water supply is high, the utility model discloses a kind of pump control unit for constant pressure water supply.
The utility model reaches goal of the invention by following technical solution:
A kind of pump control unit for constant pressure water supply, comprise three-phase alternating-current supply, three phase electric machine and water pump, three-phase alternating-current supply connects three phase electric machine by wire, and the rotating shaft of three phase electric machine connects water pump, it is characterized in that: also comprise frequency variator, hydraulic pressure sensor and microprocessor
Water pump has 2 at least, and the water outlet of water pump is all connected with water main, and every water pump is respectively driven by a three phase electric machine;
In frequency variator, be provided with rectifier and inverter, the DC output end of rectifier connects the direct current input end of inverter by wire;
In microprocessor, being provided with Using Sinusoidal Pulse Width Modulation (is Sinusoidal Pulse Width Modulation, be called for short SPWM) circuit, proportional-integral-differential (be proportion-integral-derivative, be called for short PID) control circuit and storage;
The voltage output end of three-phase alternating-current supply connects respectively the Ac input end of frequency variator rectifier by wire, the threephase AC output terminal of frequency variator inverter connects three phase electric machine by wire;
Hydraulic pressure sensor is located in the water main after the water outlet of water pump;
The signal output part of hydraulic pressure sensor connects microprocessor by signaling line, and the signal output part of microprocessor connects the direct current input end of frequency variator inverter by signaling line.
The described pump control unit for constant pressure water supply, it is characterized in that: the quantity of frequency variator is at least 2, the threephase AC output terminal of frequency variator inverter connects three phase electric machine by wire, and the direct current input end of frequency variator inverter all connects the signal output part of microprocessor by signaling line.
The described pump control unit for constant pressure water supply, is characterized in that: the rectifier of frequency variator is selected bridge rectifier, and the inverter of frequency variator is selected insulated gate bipolar transistor.
The described pump control unit for constant pressure water supply, is characterized in that: microprocessor is selected single-chip microcomputer.
When the utility model uses, three-phase alternating-current supply exports threephase AC to frequency variator, the rectifier of frequency variator converts the threephase AC receiving to direct current and exports inverter to, (be Sinusoidal Pulse Width Modulation at microprocessor Using Sinusoidal Pulse Width Modulation, be called for short SPWM) under the control of circuit, inverter offers three phase electric machine after converting direct current to threephase AC, and three phase electric machine drives water pump to draw water to water main from water source.
In microprocessor, store in advance the rating value P0 of output hydraulic pressure, hydraulic pressure in hydraulic pressure sensor detects water main is during lower than rating value, under the control of microprocessor, the frequency of the threephase AC of frequency variator inverter output rises, and the rising water pressure that water pump pumps thereby the rotating speed of three phase electric machine also rises is until the hydraulic pressure in water main reaches rating value; If the hydraulic pressure when frequency of the threephase AC of frequency variator inverter output rises to maximum value in water main does not reach rating value yet, one in all the other three phase electric machines under state of dormancy of now microprocessor control puts into operation, the water pump quantity participating in to water main pump water is increased, until the hydraulic pressure in water main reaches rating value.Otherwise, hydraulic pressure in hydraulic pressure sensor detects water main is during higher than rating value, if now the three phase electric machine in running state is more than one, first microprocessor is controlled and is made a three phase electric machine out of service in state of dormancy, order out of service is identical with the order putting into operation, and the three phase electric machine first putting into operation is first out of service after meeting hydraulic pressure and requiring; If now the three phase electric machine in running state only has one, the frequency of the threephase AC of microprocessor control frequency variator inverter output declines, and the hydraulic pressure that water pump pumps thereby the rotating speed of three phase electric machine also declines declines until the hydraulic pressure in water main reaches rating value.
When general normal operation, the three phase electric machine putting into operation and water pump all respectively have one, thereby microprocessor can timing controlled makes the dormancy in turn that puts into operation in turn of each three phase electric machine.
The utility model utilizes the combination of the parts such as frequency variator, PID control circuit, microprocessor, forms control system, regulates the output flow of water pump, realizes constant pressure water supply, has following features:
1. energy-conservation, can realize economize on electricity 20%～40%, can realize green electricity consumption;
2. floor space is little, less investment, and efficiency is high;
3. flexible configuration, automaticity is high, multiple functional, flexibility and reliability;
4. operation rationally, owing to being soft and soft stop, not only can be eliminated water hammer effect, and average torque and wearing and tearing on motor shaft reduce, and reduced amount of maintenance and maintenance expenses, and greatly improves the life-span of water pump;
5. because frequency-changing pressure stabilizing speed governing is directly supplied water from water source, reduce the secondary pollution of original way of supplying water, prevented the infection source of a lot of communicate illness;
6. by communication control, can realize unmanned, save manpower and materials.
The utility model can be used for following occasion:
1. tall building, urban and rural residents community, the domestic waters such as enterprises and institutions;
2. all types of industries needs the water of constant voltage control, cooling water circulation, heat supply network water circulation, boiler replenishing water etc.;
3. central air-conditioning system;
4. waterworks pressurization system;
5. field irrigation, sewage treatment, fountain;
6. various fluid control system of invariable pressure.
The beneficial effects of the utility model are: regulation and control accurately, are swift in response, and energy utilization rate is high, safe and reliable, applied widely.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the structural representation of the present utility model with 2 frequency variators.
Embodiment
Further illustrate the utility model by specific embodiment below.
Embodiment 1
For a pump control unit for constant pressure water supply, comprise three-phase alternating-current supply 1, three phase electric machine 2, water pump 3, frequency variator 4, hydraulic pressure sensor 5 and microprocessor 6, as shown in Figure 1, concrete structure is:
Three-phase alternating-current supply 1 connects three phase electric machine 2 by wire, and the rotating shaft of three phase electric machine 2 connects water pump 3;
Water pump 3 has 2 at least, and the present embodiment is got 3, and the water outlet of water pump 3 is all connected with water main 10, and every water pump 3 is respectively driven by a three phase electric machine 2;
In frequency variator 4, be provided with rectifier 41 and inverter 42, the DC output end of rectifier 41 connects the direct current input end of inverter 42 by wire;
In microprocessor 6, be provided with SPWM circuit, PID control circuit and storage;
The voltage output end of three-phase alternating-current supply 1 connects respectively the Ac input end of frequency variator 4 rectifiers 41 by wire, the threephase AC output terminal of frequency variator 4 inverters 42 connects three phase electric machine 2 by wire;
Hydraulic pressure sensor 5 is located in the water main 10 after the water outlet of water pump 3;
The signal output part of hydraulic pressure sensor 5 connects microprocessor 6 by signaling line, and the signal output part of microprocessor 6 connects the direct current input end of frequency variator 4 inverters 42 by signaling line.
In the present embodiment, the rectifier 41 of frequency variator 4 is selected bridge rectifier, and the inverter 42 of frequency variator 4 is selected insulated gate bipolar transistor; Microprocessor 6 is selected single-chip microcomputer.
When the present embodiment uses, three-phase alternating-current supply 1 exports threephase AC to frequency variator 4, the rectifier 41 of frequency variator 4 converts the threephase AC receiving to direct current and exports inverter 42 to, under the control of microprocessor 6 SPWM circuit, inverter 42 offers three phase electric machine 2 after converting direct current to threephase AC, and three phase electric machine 2 drives water pump 3 to draw water to water main 10 from water source.
In microprocessor, store in advance the rating value P0 of output hydraulic pressure, hydraulic pressure in hydraulic pressure sensor 5 detects water main 10 is during lower than rating value, under the control of microprocessor 6, the frequency of the threephase AC that frequency variator 4 inverters 42 are exported rises, and the rising water pressure that water pump 3 pumps thereby the rotating speed of three phase electric machine 2 also rises is until the hydraulic pressure in water main 10 reaches rating value; If the hydraulic pressure when frequency of the threephase AC that frequency variator 4 inverters 42 are exported rises to maximum value in water main 10 does not reach rating value yet, now of controlling in all the other three phase electric machines 2 under state of dormancy of microprocessor 6 is put into operation, water pump 3 quantity that participate in to water main 10 pump water are increased, until the hydraulic pressure in water main 10 reaches rating value.Otherwise, hydraulic pressure in hydraulic pressure sensor 5 detects water main 10 is during higher than rating value, if the three phase electric machine 2 now in running state is more than one, first microprocessor 6 is controlled and is made a three phase electric machine 2 out of service in state of dormancy, order out of service is identical with the order putting into operation, and the three phase electric machine 2 first putting into operation is first out of service after meeting hydraulic pressure and requiring; If the three phase electric machine 2 now in running state only has one, the frequency that microprocessor 6 is controlled the threephase AC that frequency variator 4 inverters 42 export declines, and the hydraulic pressure that water pump 3 pumps thereby the rotating speed of three phase electric machine 2 also declines declines until the hydraulic pressure in water main 10 reaches rating value.
When general normal operation, the three phase electric machine 2 putting into operation and water pump 3 all respectively have one, thereby microprocessor 6 can timing controlled makes the dormancy in turn that puts into operation in turn of each three phase electric machine 2.
The present embodiment can be used for following occasion:
1. tall building, urban and rural residents community, the domestic waters such as enterprises and institutions;
2. all types of industries needs the water of constant voltage control, cooling water circulation, heat supply network water circulation, boiler replenishing water etc.;
3. central air-conditioning system;
4. waterworks pressurization system;
5. field irrigation, sewage treatment, fountain;
6. various fluid control system of invariable pressure.
Embodiment 2
A kind of pump control unit for constant pressure water supply, comprise three-phase alternating-current supply 1, three phase electric machine 2, water pump 3, frequency variator 4, hydraulic pressure sensor 5 and microprocessor 6, as shown in Figure 2, concrete structure is: the quantity of frequency variator 4 is 2, the threephase AC output terminal of frequency variator 4 inverters 42 connects three phase electric machine 2 by wire, and the direct current input end of frequency variator 4 inverters 42 all connects the signal output part of microprocessor 6 by signaling line.Other structures are all same with embodiment 1.
When the present embodiment uses, thereby microprocessor 6 can timing controlled makes the dormancy in turn that puts into operation in turn of 2 frequency variators 4.Other usings method are all same with embodiment 1.
Claims (4)
1. the pump control unit for constant pressure water supply, comprise three-phase alternating-current supply (1), three phase electric machine (2) and water pump (3), three-phase alternating-current supply (1) connects three phase electric machine (2) by wire, the rotating shaft of three phase electric machine (2) connects water pump (3), it is characterized in that: also comprise frequency variator (4), hydraulic pressure sensor (5) and microprocessor (6)
Water pump (3) has 2 at least, and the water outlet of water pump (3) is all connected with water main (10), and every water pump (3) is respectively driven by a three phase electric machine (2);
In frequency variator (4), be provided with rectifier (41) and inverter (42), the DC output end of rectifier (41) connects the direct current input end of inverter (42) by wire;
Microprocessor is provided with Using Sinusoidal Pulse Width Modulation circuit, proportional-integral-differential control circuit and storage in (6);
The voltage output end of three-phase alternating-current supply (1) connects respectively the Ac input end of frequency variator (4) rectifier (41) by wire, the threephase AC output terminal of frequency variator (4) inverter (42) connects three phase electric machine (2) by wire;
Hydraulic pressure sensor (5) is located in the water main (10) after the water outlet of water pump (3);
The signal output part of hydraulic pressure sensor (5) connects microprocessor (6) by signaling line, and the signal output part of microprocessor (6) connects the direct current input end of frequency variator (4) inverter (42) by signaling line.
2. the pump control unit for constant pressure water supply as claimed in claim 1, it is characterized in that: the quantity of frequency variator (4) is at least 2, the threephase AC output terminal of frequency variator (4) inverter (42) connects three phase electric machine (2) by wire, and the direct current input end of frequency variator (4) inverter (42) all connects the signal output part of microprocessor (6) by signaling line.
3. the pump control unit for constant pressure water supply as claimed in claim 1 or 2, it is characterized in that: the rectifier (41) of frequency variator (4) is selected bridge rectifier, the inverter (42) of frequency variator (4) is selected insulated gate bipolar transistor.
4. the pump control unit for constant pressure water supply as claimed in claim 1 or 2, is characterized in that: microprocessor (6) is selected single-chip microcomputer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320887531.8U CN203770109U (en) | 2013-12-31 | 2013-12-31 | Water pump control device for constant pressure water supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320887531.8U CN203770109U (en) | 2013-12-31 | 2013-12-31 | Water pump control device for constant pressure water supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203770109U true CN203770109U (en) | 2014-08-13 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320887531.8U Expired - Lifetime CN203770109U (en) | 2013-12-31 | 2013-12-31 | Water pump control device for constant pressure water supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203770109U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104898628A (en) * | 2015-05-29 | 2015-09-09 | 上海美维电子有限公司 | Control system and control method for circuit board production line fluid equipment |
-
2013
- 2013-12-31 CN CN201320887531.8U patent/CN203770109U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104898628A (en) * | 2015-05-29 | 2015-09-09 | 上海美维电子有限公司 | Control system and control method for circuit board production line fluid equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140813 |