CN101363236A - Control method for preventing pool from misstopping pump - Google Patents
Control method for preventing pool from misstopping pump Download PDFInfo
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- CN101363236A CN101363236A CNA200810197106XA CN200810197106A CN101363236A CN 101363236 A CN101363236 A CN 101363236A CN A200810197106X A CNA200810197106X A CN A200810197106XA CN 200810197106 A CN200810197106 A CN 200810197106A CN 101363236 A CN101363236 A CN 101363236A
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- pump
- change rate
- liquid level
- water
- level change
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
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Abstract
The invention relates to a water supply system of industrial enterprises, and provides a control method for preventing mistaken stop of a pump in a pool. When the water level measured by a liquid level meter reaches or is lower than the set water level for stopping the pump, the change rate of the actual measured water level is calculated to judge whether the actual measured value is within the normal range of the theoretical water level change rate. Only the two conditions are realized, the water pump control system sends a pump stop signal, thus judging the failure and false reporting of a water level measuring system, so as to prevent the water level measuring system from mistakenly stopping the pump by the chain effect.
Description
Technical field
The present invention relates to the water system of industrial enterprise.
Background technology
In the water system of industrial enterprise, when water pump draws water from the pond, by content gauge the water level in pond is measured and monitored, cross when low when water level in water pool, control system is sent chain termination of pumping signal, prevents that water pump idle running from reaching the purpose of protection water pump.Contactless content gauges such as radar, ultrasonic wave are adopted in the measurement of water level in water pool more, because various interference and fault cause the content gauge wrong report easily, thereby cause the mistakenly stop pump, give and produce, live and cause adverse effect even heavy losses in the actual production process.At present, for increasing the reliability that liquid level detects, have to adopt many content gauges to carry out level measuring simultaneously to a pond, make investment increase, the plant maintenance amount increases.
Summary of the invention
Technical problem to be solved by this invention provides a kind of control method that prevents pool from misstopping pump, can effectively prevent pool from misstopping pump.
In order to solve the problems of the technologies described above, the invention provides a kind of control method that prevents pool from misstopping pump, comprise pond water outlet control system of water pump, described water outlet control system of water pump is judged the content gauge measured value, set low level value if the content gauge measured value reaches or is lower than, then control the water outlet water pump and shut down; It is characterized in that, described water outlet control system of water pump also will calculate actual measurement liquid level change rate according to the content gauge measured value, relatively survey liquid level change rate and theoretical liquid level change rate, do you judge that the two is in the nominal error scope? if, then send chain termination of pumping signal, otherwise, do not send chain termination of pumping signal; Described actual measurement liquid level change rate equals the difference of current content gauge measured value and benchmark level value constantly divided by the time interval between the two; Described theoretical liquid level change rate is pond discharge and locates the difference of discharge divided by the pond cross-sectional area.
Whether the principle that technique scheme has utilized water level in water pool to suddenly change is reported by mistake content gauge and to be judged that the calculating principle of described theoretical liquid level change rate is: establish pond water outlet water pump pump group rate of discharge Q
Water outlet(meter per second), it depends on the demand with the user; User's circling water flow rate Q
Backwater(meter per second); Filling pipe inlet flow rate Q
Moisturizing(meter per second), the aperture that changes the moisturizing valve can change Q
MoisturizingSize; Pond liquid level H (rice) according to dynamic water balance relation, has:
(1) in the formula: A is the pond cross-sectional area,
Be the theoretical liquid level change rate in pond.Therefore, pond liquid level rate of change:
Consider the disturbance factor of actual measurement disturbance and measure error, then revise the theoretical liquid level change rate in back
V
r=(1+ β) * (Q
Water outlet-Q
Backwater-Q
Moisturizing)/A (2)
(2) in the formula: β is the measure error correction factor, and span is between 2%～5%.If actual measurement liquid level change rate is greater than theoretical liquid level change rate V
r, then this moment, level value may be the wrong report that various interference and fault cause content gauge.
The principle that the present invention utilizes water level in water pool to suddenly change; got rid of the wrong report that various interference and fault cause content gauge; thereby effectively prevented water outlet water pump mistakenly stop machine accident, reduced the equipment investment of prior art simultaneously, reduced the plant maintenance amount because of adopting the multi-level meter to produce.
Description of drawings
Below in conjunction with the drawings and specific embodiments technical scheme of the present invention is further described in detail.
Fig. 1 is the on-the-spot structural representation in pond.
Fig. 2 is a water outlet control system of water pump control flow chart of the present invention.
The specific embodiment
As shown in Figure 1, filling pipe 4 is to pond 1 moisturizing, and waterline 3 tops in pond 1 are equipped with content gauge 2, water pump assembly 8 is installed on the outlet pipe 6 of bottom is drawn water to user's 7 water supply, and the backwater after user 7 uses is back in the pond 1 by return pipe 5.Water pump assembly 8 is by 9 controls of water outlet control system of water pump, and the water level value that content gauge 2 records sends to water outlet control system of water pump 9.
Water outlet control system of water pump control flow chart as shown in Figure 2, after system begins, execution in step 101: receive the content gauge measured value, execution in step 102 then: the low level value that judges whether to be lower than default? if not, get back to step 101 and continue to receive the content gauge measured value.If, then further execution in step 103: theory of computation liquid level change rate, actual measurement liquid level change rate; Then, execution in step 103104 again: judge that actual measurement liquid level change rate is less than theoretical liquid level change rate? if then execution in step 105: send water pump and shut down chain signal; Otherwise, execution in step 106: send the content gauge fault alarm.
It should be noted last that, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although the present invention is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement technical scheme of the present invention, and not breaking away from the spirit and scope of technical solution of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (1)
1, a kind of control method that prevents pool from misstopping pump comprises pond water outlet control system of water pump, and described water outlet control system of water pump is judged the content gauge measured value, sets low level value if the content gauge measured value reaches or is lower than, and then controls the water outlet water pump and shuts down; It is characterized in that, described water outlet control system of water pump also will calculate actual measurement liquid level change rate according to the content gauge measured value, relatively survey liquid level change rate and theoretical liquid level change rate, do you judge that the two is in the nominal error scope? if, then send chain termination of pumping signal, otherwise, do not send chain termination of pumping signal; Described actual measurement liquid level change rate equals the difference of current content gauge measured value and benchmark level value constantly divided by the time interval between the two; Described theoretical liquid level change rate is pond discharge and locates the difference of discharge divided by the pond cross-sectional area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200810197106XA CN101363236A (en) | 2008-09-27 | 2008-09-27 | Control method for preventing pool from misstopping pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200810197106XA CN101363236A (en) | 2008-09-27 | 2008-09-27 | Control method for preventing pool from misstopping pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101363236A true CN101363236A (en) | 2009-02-11 |
Family
ID=40389820
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA200810197106XA Pending CN101363236A (en) | 2008-09-27 | 2008-09-27 | Control method for preventing pool from misstopping pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101363236A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102374927A (en) * | 2010-08-24 | 2012-03-14 | 中芯国际集成电路制造(上海)有限公司 | Leakage detection device and detection method using same |
| CN105435593A (en) * | 2015-12-31 | 2016-03-30 | 中冶南方工程技术有限公司 | Substance-separating circulation integrated washing tower and washing technology thereof |
| CN110220573A (en) * | 2019-05-23 | 2019-09-10 | 首钢京唐钢铁联合有限责任公司 | Liquidometer fault judgment method, device and electronic equipment |
-
2008
- 2008-09-27 CN CNA200810197106XA patent/CN101363236A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102374927A (en) * | 2010-08-24 | 2012-03-14 | 中芯国际集成电路制造(上海)有限公司 | Leakage detection device and detection method using same |
| CN105435593A (en) * | 2015-12-31 | 2016-03-30 | 中冶南方工程技术有限公司 | Substance-separating circulation integrated washing tower and washing technology thereof |
| CN110220573A (en) * | 2019-05-23 | 2019-09-10 | 首钢京唐钢铁联合有限责任公司 | Liquidometer fault judgment method, device and electronic equipment |
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| PB01 | Publication | ||
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Open date: 20090211 |