CN104775478A - Control unit for variable-frequency constant-pressure water supply - Google Patents
Control unit for variable-frequency constant-pressure water supply Download PDFInfo
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- CN104775478A CN104775478A CN201510127560.8A CN201510127560A CN104775478A CN 104775478 A CN104775478 A CN 104775478A CN 201510127560 A CN201510127560 A CN 201510127560A CN 104775478 A CN104775478 A CN 104775478A
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- water
- water supply
- pressure
- supply network
- reservoir
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Abstract
The invention discloses a control unit for variable-frequency constant-pressure water supply. The control unit comprises an impounding reservoir, a pumping unit and a water supply network; water in the impounding reservoir is pumped by the pumping unit and is supplied to the water supply network; the pumping unit is connected with a controller; the water supply network is provided with a water pressure detector; the controller is provided with a PID (proportion integration differentiation) regulator; the PID regulator is connected with the pumping unit through a frequency converter; the rotational speed of the pumping unit is controlled by the PID regulator according to water supply network water pressure detected by the water pressure detector through the frequency converter to realize constant-pressure variable water supply. Through the control unit disclosed by the invention, according to the change of the water supply network water pressure, the rotational speed regulation is performed on the pumping unit, and therefore the constant-pressure variable water supply is realized; the control unit has the advantages that the pressure is stable, and the energy-saving effect is obvious.
Description
Technical field
The present invention relates to hydrotechny.
Background technology
Current water supply modes generally has water tank (tower) formula to feed water and pneumatic water supply two kinds.
Water tank (tower) formula water supply facilities: when equipment normally works, when water level in high level cistern lower than the turn on pump water level pre-seted and reservoir water level higher than full water level time, control appliance is automatically opened feed pump and is started to supply water in water tank; When water level in case higher than the termination of pumping water level pre-seted or reservoir water level lower than low water water level time, control appliance stops feed pump terminating water supply process automatically, periodic duty like this.
Pneumatic installation water supply: when pump working, while water delivers to waterline network, unnecessary water enters auto-pneumatic cylinder, hydroecium expand and by the gas compression in tank, air chamber reduces pressure in tank and also increases, when pressure is increased to maximum working pressure P2, water pump stall, and utilize in tank and by the pressure of Compressed Gas, the water stored in tank is sent in water service pipe, hydroecium reduces, airspace enlargement, in tank, pressure also declines thereupon, and when Pressure Drop is to minimum operating pressure P1, water pump restarts, so go round and begin again, constantly run.
But all there are some defects in above-mentioned two kinds of water supply facilitiess.
Water tank, water tower type water supply facilities: water tank (tower) formula water supply modes long construction period, construction costs are high, and water quality is easily by outside contamination, and water tank (tower) highly limits by condition, and is unfavorable for antidetonation; Building top user's hydraulic pressure on the low side, there is secondary pollution in high level cistern; Because there being the existence of water tank, must increase the structure load-bearing of building, also destroying the aesthetic property of building simultaneously, when the height of building is higher, the impact produced during starting of pump station and the water hammer produced when stopping, producing greater impact to the accessory such as pipe network and water appliance.
Pneumatic installation water supply: feed pressure change is greatly, unstable; Running cost is high, and starting of pump station is more frequent.
Summary of the invention
Technical problem to be solved by this invention is just to provide a kind of constant pressure water supply and controls unit, realizes steadily supplying water.
For solving the problems of the technologies described above, the present invention adopts following technical scheme: a kind of constant pressure water supply controls unit, comprise reservoir, water pump assembly and water supply network, the water that described water pump assembly extracts in reservoir supplies water to water supply network, described water pump assembly is connected with controller, described water supply network is provided with device for detecting water pressure, described controller is provided with PID adjuster, described PID adjuster is connected with water pump assembly by frequency converter, described PID adjuster realizes constant-pressure variable according to the water supply network hydraulic pressure that device for detecting water pressure detects by the rotating speed of Frequency Converter Control water pump and supplies water.
Preferably, described device for detecting water pressure is pressure sensor or distance-transmission pressure gauge.
Preferably, be provided with ball float in described reservoir, described ball float is connected with fluid level controller, and described fluid level controller is connected with reservoir water supply installation.
The present invention, according to water supply network variation in water pressure, carries out rotational speed regulation to water pump assembly thus realizes constant-pressure variable supplying water, have pressure steadily, the advantage of obvious energy conservation.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the invention will be further described:
Fig. 1 is structural representation of the present invention.
Detailed description of the invention
As shown in Figure 1, a kind of constant pressure water supply controls unit, comprise ground reservoir, water pump assembly and water supply network, the water that described water pump assembly extracts in ground reservoir supplies water to water supply network, water supply network is made up of with grid main and user, described water pump assembly is connected with controller, described water supply network is provided with device for detecting water pressure, described controller is connected with PID adjuster, frequency converter and fluid level controller, described PID adjuster is connected with water pump assembly by frequency converter, described PID adjuster realizes constant-pressure variable according to the water supply network hydraulic pressure that device for detecting water pressure detects by the rotating speed of Frequency Converter Control water pump and supplies water.
Wherein, described device for detecting water pressure is pressure sensor or distance-transmission pressure gauge.
In addition, be provided with ball float in ground reservoir, described ball float is connected with fluid level controller, and described fluid level controller is connected with reservoir water supply installation.When ground reservoir water level decreasing is to certain altitude, fluid level controller controls the reservoir water supply earthward of reservoir water supply installation.
Advantage of the present invention:
1. adopt frequency conversion and unvarying pressure control, the multiple demand of user can be met.
2. can keep water supply system constant pressure, operating pressure sets as required.
3. compact, volume is little, occupation of land is few, needn't build high level cistern or water tower, reduced investment, install fast.
4. energy-efficient, regulate the rotating speed of water pump by actual used water amount, eliminate superpressure and backflow loss.
5. reliability of water supply is high, and to overcurrent, overvoltage/undervoltage, water level, too low and frequency converter failure can judge process voluntarily, has complete electric security protector and electrical fault crosses over function.
6. automaticity is high, flexible by mode processed, fully automatic working unmanned.
7. frequency converter realizes the soft start of water pump, reduces the impact of electrical network and pipe network, extends the application life of equipment.
8. the direct normal pressure of pipe network supplies water, without water pollution once again, easy to operate.
Claims (3)
1. a constant pressure water supply controls unit, comprise reservoir, water pump assembly and water supply network, the water that described water pump assembly extracts in reservoir supplies water to water supply network, described water pump assembly is connected with controller, it is characterized in that: described water supply network is provided with device for detecting water pressure, described controller is provided with PID adjuster, described PID adjuster is connected with water pump assembly by frequency converter, and described PID adjuster realizes constant-pressure variable according to the water supply network hydraulic pressure that device for detecting water pressure detects by the rotating speed of Frequency Converter Control water pump and supplies water.
2. a kind of constant pressure water supply according to claim 1 controls unit, it is characterized in that: described device for detecting water pressure is pressure sensor or distance-transmission pressure gauge.
3. a kind of constant pressure water supply according to claim 1 controls unit, and it is characterized in that: be provided with ball float in described reservoir, described ball float is connected with fluid level controller, and described fluid level controller is connected with reservoir water supply installation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510127560.8A CN104775478A (en) | 2015-03-23 | 2015-03-23 | Control unit for variable-frequency constant-pressure water supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510127560.8A CN104775478A (en) | 2015-03-23 | 2015-03-23 | Control unit for variable-frequency constant-pressure water supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104775478A true CN104775478A (en) | 2015-07-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510127560.8A Pending CN104775478A (en) | 2015-03-23 | 2015-03-23 | Control unit for variable-frequency constant-pressure water supply |
Country Status (1)
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2042478U (en) * | 1989-02-04 | 1989-08-09 | 牟在洙 | Automatic water supply installation with constant pressure and changeable flow rate |
| JPH10103251A (en) * | 1996-09-26 | 1998-04-21 | Toshihiro Omi | Automatic water supply device |
| CN102116043A (en) * | 2009-12-31 | 2011-07-06 | 上海东方泵业(集团)有限公司 | Frequency conversion constant-pressure water supply system and control method thereof |
| CN204475438U (en) * | 2015-03-23 | 2015-07-15 | 川源(中国)机械有限公司 | A kind of constant pressure water supply controls unit |
-
2015
- 2015-03-23 CN CN201510127560.8A patent/CN104775478A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2042478U (en) * | 1989-02-04 | 1989-08-09 | 牟在洙 | Automatic water supply installation with constant pressure and changeable flow rate |
| JPH10103251A (en) * | 1996-09-26 | 1998-04-21 | Toshihiro Omi | Automatic water supply device |
| CN102116043A (en) * | 2009-12-31 | 2011-07-06 | 上海东方泵业(集团)有限公司 | Frequency conversion constant-pressure water supply system and control method thereof |
| CN204475438U (en) * | 2015-03-23 | 2015-07-15 | 川源(中国)机械有限公司 | A kind of constant pressure water supply controls unit |
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| EXSB | Decision made by sipo to initiate substantive examination | ||
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Application publication date: 20150715 |