CN201443088U - Frequency-conversion water supply electric device - Google Patents
Frequency-conversion water supply electric device Download PDFInfo
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- CN201443088U CN201443088U CN2009200293755U CN200920029375U CN201443088U CN 201443088 U CN201443088 U CN 201443088U CN 2009200293755 U CN2009200293755 U CN 2009200293755U CN 200920029375 U CN200920029375 U CN 200920029375U CN 201443088 U CN201443088 U CN 201443088U
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- water supply
- frequency
- pressure
- frequency converter
- conversion
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Abstract
The utility model provides a frequency-conversion water supply electric device, which relates to a water supply device which controls the operational frequency of a frequency converter according to the pipe network pressure by using an electric joint pressure meter. The utility model mainly solves the problems that a PID parameter in the existing frequency-conversion and constant-pressure water supply device is difficult to be regulated, and the pressure meter is easy to be damaged for long-distance conveyance. The frequency-conversion water supply electric device comprises a frequency-conversion water supply control cabinet and a water supply pipe, wherein a check valve and a water pump are arranged on the water supply pipe, a three-phase power supply is connected with the input end of the frequency-conversion water supply control cabinet, the output end of the frequency-conversion water supply control cabinet is connected with the water pump, and the electric point pressure meter is arranged on the water supply pipe, and is connected with a frequency converter of the frequency-conversion water supply control cabinet. When the pipeline pressure is between the upper limit and the lower limit of the electric joint pressure meter, the frequency converter operates stably, and the abrasion of the water pump can be greatly lowered. The regulation of the PID parameter is avoided, in addition, the abrasion phenomenon of a thin-film resistor of the electric joint pressure meter does not occur, and the service life is long.
Description
Technical field
The utility model relates to a kind of electric installation of variable frequency water supply, and specifically a kind of use electro connecting pressure gauge is according to the water supply installation of ductwork pressure control frequency converter running frequency.
Background technology
User's water supply volume how much be often change, so insufficient water or the superfluous situation that supplies water happen occasionally.And the uneven concentrated area between water and the water supply is reflected on the pressure of water supply, and promptly user's water supply volume strengthens and the water pump output is constant, and then ductwork pressure reduces; User's water supply volume reduces and the water pump output is constant, and then ductwork pressure increases.If do not take measures, the water supply network of leaving is bearing under the hydraulic pressure unsure state, then can quicken the wearing and tearing of water supply network and water pump, reduction of service life.
For addressing the above problem, people's constant pressure water supply equipment that begins one's study.At present, known constant pressure water supply equipment is the varying speed and constant pressure feed water device, it is the pressure signal that receives water supply network by pressure sensor or teletransmission pressure meter, and pass to and output signal to frequency converter, after P, I, D computing, reach the constant of pipe network water supply pressure by the rotating speed of Frequency Converter Control water pump, thereby make water pump all the time according to how many efficient low-consumes operations of user's water supply volume, improve overall efficiency greatly, to greatest extent saves energy and waterpower resourses.Constant pressure water supply, by the rotating speed of regulating water pump can make supply water and water between keep balance, promptly user's water supply volume strengthen or when reducing pump rotary speed increase or reduce, thereby ductwork pressure remains unchanged, and has improved the quality that supplies water.
The constant pressure water supply device can be good at satisfying user's water demand, but this constant pressure water supply device is to adopt pressure transmitter or teletransmission pressure meter to gather ductwork pressure, also needs to carry out P, I simultaneously, D adjusts and can reach good effect.And in the manufacturing process of reality, the user can't well use this device, because PID adjusts comparatively trouble, and control accuracy is higher, in case occur pipeline pressure and setting pressure when inconsistent the running frequency of frequency converter small size fluctuation up and down will appear.The teletransmission pressure meter is to adopt resistance-type mostly, long operational time easy wearing and tearing, cause feedback pressure signal to cut in and out, make constant pressure water supply device cisco unity malfunction.
The utility model content
The purpose of this utility model is to provide a kind of electric installation of variable frequency water supply, and this water supply installation uses electro connecting pressure gauge, according to ductwork pressure control frequency converter running frequency, overcomes the bad adjustment of pid parameter, the flimsy defective of teletransmission pressure meter.
The technical scheme in the invention for solving the technical problem is: the electric installation of this kind variable frequency water supply, comprise variable frequency water supply switch board and feed pipe, variable frequency water supply switch board input connects three phase mains, output connects water pump, it is characterized in that, an electro connecting pressure gauge is installed on described feed pipe; The frequency converter of described electro connecting pressure gauge and variable frequency water supply switch board links to each other by the pressure meter holding wire, the low pressure limit pointer of electro connecting pressure gauge inserts the rising operation terminal of frequency converter, the upper pressure limit pointer of electro connecting pressure gauge inserts the decline operation terminal of frequency converter, and the common port of electro connecting pressure gauge inserts the common port of frequency converter.
The beneficial effects of the utility model are:
1, adopt electro connecting pressure gauge, according to ductwork pressure control frequency converter running frequency, frequency converter meeting stable operation between the upper limit lower limit of electro connecting pressure gauge, the fluctuation up and down in the time of the PID adjustment can not occurring.Frequency conversion can be stablized in certain scope, can reduce the wearing and tearing of water pump greatly.
2, the adjustment of pid parameter has been avoided in the operation of adopting electro connecting pressure gauge to control frequency converter, and the phenomenon that electric contact pressure is widely-used, easy-to-understand, the wearing and tearing of film resistor simply, can not appear in wiring, longer service life.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Annexation schematic diagram between Fig. 2 electro connecting pressure gauge and the frequency converter.
Among the figure: 1 variable frequency water supply switch board, 2 delivery ports, 3 flap valve, 4 electro connecting pressure gauges, 5 water pumps, 6 pressure meter holding wires, 7 water inlets, 8 feed pipes.
The specific embodiment
As shown in Figure 1 and Figure 2.A kind of electric installation of variable frequency water supply comprises variable frequency water supply switch board 1 and feed pipe 8, and feed pipe 8 one ends are water inlet 7, and the other end is a delivery port 2, and flap valve 3 and water pump 5 are installed on the feed pipe 8, and flap valve 3 is installed between water pump 5 and the delivery port 2; An electro connecting pressure gauge 4 is installed on feed pipe 8; The frequency converter of described electro connecting pressure gauge 4 and variable frequency water supply switch board 1 links to each other by pressure meter holding wire 6.Variable frequency water supply switch board 1 input connects three phase mains, output connects water pump 5, the low pressure limit pointer of electro connecting pressure gauge 4 inserts the rising operation terminal of frequency converter, the upper pressure limit pointer of electro connecting pressure gauge 4 inserts the decline operation terminal of frequency converter, and the common port of electro connecting pressure gauge 4 inserts the common port of frequency converter.Electro connecting pressure gauge is widely used, and it is installed with wiring and belongs to existing mature technology.
Flap valve 3 is installed is the refluence for anti-sealing on feed pipe 8, electro connecting pressure gauge 4 can be installed in optional position on the feed pipe 8 according to actual conditions, as long as can just can by reacting pipe pressure.
In feed pipe 8 water supply processes, pipeline pressure often changes.When the threshold pression of pipeline pressure at electro connecting pressure gauge 4, frequency converter frequency rises; When the upper limit pressure of pipeline pressure at electro connecting pressure gauge 4, frequency converter frequency descends.
Pipeline pressure can be all the time less than the threshold pression of electro connecting pressure gauge during greater than the last water yield of water pump 5 when water supply volume, and frequency converter frequency can be in a kind of propradation always; When the last water yield of water pump 5 greater than water supply volume the time pipeline pressure can slowly rise, the running frequency of frequency converter still is in a propradation, up to the threshold pression of pipeline pressure greater than electro connecting pressure gauge 4, the running frequency of frequency converter stops to rise stable operation.
If this hourly water consumption is during greater than the last water yield, the running frequency of frequency converter can continue to rise, if water supply volume is during less than the last water yield, frequency converter frequency stable operation, but pipeline pressure can continue to rise, when pipeline pressure equals the upper limit pressure of electro connecting pressure gauge 4, the running frequency of frequency converter begins to descend, the last water yield is less than water supply volume the time, and pipeline pressure can be less than upper limit pressure, and frequency converter frequency stops to descend.
Frequency converter can stable operation between the higher limit of electro connecting pressure gauge 4 and lower limit, the fluctuation up and down in the time of PID can not occurring and adjust.Frequency conversion can be stablized in certain scope, can reduce the wearing and tearing of water pump greatly.
The adjustment of pid parameter has been avoided in the operation of adopting electro connecting pressure gauge 4 to control frequency converters, and the phenomenon that electric contact pressure is widely-used, easy-to-understand, the wearing and tearing of film resistor simply, can not appear in wiring, longer service life.
Claims (1)
1. the electric installation of a variable frequency water supply comprises variable frequency water supply switch board and feed pipe, and variable frequency water supply switch board input connects three phase mains, and output connects water pump, it is characterized in that, an electro connecting pressure gauge is installed on described feed pipe; The frequency converter of described electro connecting pressure gauge and variable frequency water supply switch board links to each other by the pressure meter holding wire, the low pressure limit pointer of electro connecting pressure gauge inserts the rising operation terminal of frequency converter, the upper pressure limit pointer of electro connecting pressure gauge inserts the decline operation terminal of frequency converter, and the common port of electro connecting pressure gauge inserts the common port of frequency converter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200293755U CN201443088U (en) | 2009-07-07 | 2009-07-07 | Frequency-conversion water supply electric device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200293755U CN201443088U (en) | 2009-07-07 | 2009-07-07 | Frequency-conversion water supply electric device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201443088U true CN201443088U (en) | 2010-04-28 |
Family
ID=42547763
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200293755U Expired - Fee Related CN201443088U (en) | 2009-07-07 | 2009-07-07 | Frequency-conversion water supply electric device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201443088U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102864815A (en) * | 2012-09-26 | 2013-01-09 | 苏州汉酶生物技术有限公司 | Water supplying system |
-
2009
- 2009-07-07 CN CN2009200293755U patent/CN201443088U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102864815A (en) * | 2012-09-26 | 2013-01-09 | 苏州汉酶生物技术有限公司 | Water supplying system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Qufu Jiaxin Electric Co., Ltd. Assignor: Yao Qi|Zhang Jian|Yan Bingqiang Contract record no.: 2011370000220 Denomination of utility model: Frequency-conversion water supply electric device Granted publication date: 20100428 License type: Exclusive License Record date: 20110520 |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100428 Termination date: 20130707 |