CN102852194B - Constant-pressure water supply system and method without negative pressure - Google Patents
Constant-pressure water supply system and method without negative pressure Download PDFInfo
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- CN102852194B CN102852194B CN201110174563.9A CN201110174563A CN102852194B CN 102852194 B CN102852194 B CN 102852194B CN 201110174563 A CN201110174563 A CN 201110174563A CN 102852194 B CN102852194 B CN 102852194B
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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 constant-pressure water supply system without pressure. The water supply system comprises a water supply tank with a water inlet and a water outlet, wherein the water inlet is connected with a municipal pipe, and the water outlet is connected with a booster water pump driven by a frequency converter. The water supply system also comprises a first detection unit and a first control unit, wherein the first detection unit is connected with a water outlet and is used for detecting the pressure of the water outlet, and the first control unit detects and obtains the output of the pressure regulating frequency converter of the water outlet according to the first detection unit. The invention also provides a corresponding constant-pressure water supply method. According to the water supply system and the water supply method, the constant pressure of the water outlet under the condition of the lowest output power can be ensured by utilizing the pressure of the municipal pipe and adjusting the booster water pump by frequency conversion.
Description
Technical field
The present invention relates to secondary water supply system, more particularly, relate to a kind of for realize secondary water-supply without negative pressure constant pressure water supply system and method.
Background technology
In order to realize stable water supply, the places such as a lot of residential quarter, industrial enterprise, hotel, office premises, hospital, school all have independent water system.Traditional water system mainly contains following two kinds.
(1) water tower water-feeding: first tap water is evacuated to water tower (or top of building water tank), the pressure then produced by water tower oneself height is supplied water to user.But this water system exists a lot of problem, such as water tower takes up an area greatly, construction trouble, efficiency low (water first will be evacuated to water tower, waste electric energy).In addition, because pressure of supply water is relevant with the height of water in water tower, therefore cannot provide constant pressure, and the user of differing heights it is also different by water pressure.This kind of way of supplying water is withdrawn from the market gradually at present.
(2) power frequency supplies water: the tap water of city planting ductwork is caused reservoir, then by the water pump being in power frequency operation of certain power, water is delivered to user.But from original pressure vanishing after entering pond of the tap water of city planting ductwork, then being pressurization of starting from scratch again when user supplies water, this must cause a large amount of electric power energy wastes.In addition, because when supplying water, water pump is in power frequency operation all the time, energy consumption is higher.
(3) variable frequency water supply: the tap water of city planting ductwork is caused reservoir, uses regimen condition by frequency converter according to user, and drag water pump and be in different running frequency, provide the water of constant pressure to use to user, in compared with second, method energy-saving effect is obvious.But reservoir retaining process causes the pressure waste of city planting ductwork equally.
Further, above-mentioned three kinds of way of supplying water all need reservoir, both take place, and need often cleaning, and water quality easily forms secondary pollution.
Summary of the invention
The technical problem to be solved in the present invention is, high and easily cause the defect of secondary pollution for the power consumption of existing water system, provides a kind of without negative pressure constant pressure water supply system and method.
The technical solution adopted for the present invention to solve the technical problems is: provide a kind of without negative pressure constant pressure water supply system, comprise the water supply tank with water inlet and delivery port, wherein said water inlet connects city planting ductwork, described delivery port is connected with the booster water pump by transducer drive, also comprise the first detecting unit and the first control unit, described first detecting unit is connected to delivery port and for detecting mouth of a river pressure, described first control unit detects the rate-adaptive pacemaker of the delivery port pressure adjusting frequency converter obtained according to described first detecting unit; Described first detecting unit is positioned at the front end of booster water pump.
Of the present invention without in negative pressure constant pressure water supply system, also comprise electromagnetic valve, the second detecting unit and the second control unit, wherein said electromagnetic valve is connected between city planting ductwork and the water inlet of water supply tank, described second detecting unit is for detecting city planting ductwork intake pressure, and described second control unit is used for detecting according to described second detecting unit the openings of sizes that the intake pressure obtained adjusts described electromagnetic valve.
Of the present invention without in negative pressure constant pressure water supply system, described first control unit comprises frequency computation part subelement and exports control subelement, wherein said frequency computation part subelement is used for detecting according to the first detecting unit the delivery port pressure and preset pressure calculating frequency converter output frequency that obtain, and described output control subelement is used for adjusting frequency converter output according to calculating the frequency converter output frequency obtained.
The present invention also provides a kind of without negative pressure constant pressure water supply method, being supplied to water end (W.E.), comprising the following steps for being supplied water by city planting ductwork after carrying out pressure adjusting:
A described city planting ductwork supplies water and accesses water supply tank by (), the delivery port of described water supply tank is connected with by the booster water pump of transducer drive;
B () detects mouth of a river pressure by the pressure-detecting device being connected to delivery port, described pressure-detecting device is positioned at the front end of booster water pump;
C () is according to the output of the delivery port pressure adjusting frequency converter of described detection;
Also comprise:
(f1) judge whether mouth of a river pressure is more than or equal to capping pressure, if then perform step (f2), otherwise perform step (f5);
(f2) judge whether frequency converter running frequency reaches lower frequency limit, if then perform step (f3), otherwise return step (f1);
(f3) judge whether frequency converter reaches the dormancy time of setting running time under lower frequency limit, if reach, perform step (f4), otherwise return step (f1);
(f4) make water system be in sleep state, and return step (f1);
(f5) judge whether mouth of a river pressure is less than setting threshold pression, if then perform step (f6), otherwise return step (f1);
(f6) judge whether water system is in sleep state, if then perform step (f7), otherwise return step (f1);
(f7) judge that water system is in the dormant time and whether reaches wakeup time, if reach, perform step (f8), otherwise return step (f1);
(f8) water system is waken up from sleep state, and return step (f1).
Of the present invention without in negative pressure constant pressure water supply method, be connected with electromagnetic valve between described water supply tank and city planting ductwork, also comprise: detect city planting ductwork intake pressure and adjust electromagnetic valve openings of sizes according to intake pressure.
Of the present invention without in negative pressure constant pressure water supply method, described step (c) comprising:
(c1) according to detecting the delivery port pressure and preset pressure calculating frequency converter output frequency that obtain;
(c2) export according to calculating the frequency converter output frequency adjustment frequency converter obtained.
Of the present invention without in negative pressure constant pressure water supply method, described booster water pump comprises the water pump of multiple stage series connection, and each water pump is by a transducer drive, and described step (c2) comprising:
(c21) judge to calculate the output frequency obtained whether be more than or equal to the upper limiting frequency of the frequency converter being in operating condition and delivery port pressure lower than setting pressure, if then perform step (c22), otherwise perform step (c23);
(c22) start one and be in halted state and the longest water pump of dwell time, and return step (b);
(c23) judge to calculate the output frequency obtained whether be less than the lower frequency limit of the frequency converter being in operating condition and delivery port pressure higher than setting pressure, if then perform step (c24), otherwise perform step (c25);
(c24) stop one to be in running status and the duration of runs the longest water pump, and return step (b);
(c25) adjust frequency converter frequency to export, and return step (b).
Of the present invention without in negative pressure constant pressure water supply method, described booster water pump comprises the water pump of multiple stage series connection, further comprising the steps of:
(d1) judge whether to there is the water pump being greater than setting-up time running time, if exist, perform step (d2), otherwise perform step (d1);
(d2) judge whether to exist the water pump being in halted state, if exist, perform step (d3), otherwise return step (d1);
(d3) select a water pump that downtime is the longest and start this water pump, making the water pump being greater than setting-up time running time out of service simultaneously.
In non-negative pressure method of water supply method of the present invention, described booster water pump comprises the water pump of multiple stage series connection, further comprising the steps of:
(e1) judge whether to exist the water pump being in halted state, if exist, perform step (e2), otherwise perform step (e4);
(e2) judge whether the dwell time being in the water pump of halted state is greater than the setting antifreeze time, if then perform step (e3), otherwise perform step (e1);
(e3) make this be in halted state and dwell time is greater than the water pump low-frequency operation the antifreeze running time resetting this water pump that set the antifreeze time, and perform step (e1);
(e4) judge whether to exist the water pump being in antifreeze operation, if exist, perform step (e5), otherwise perform step (e1);
(e5) judge whether the antifreeze running time being in the water pump of antifreeze running status reaches the scheduled time, if reach, performs step (e6), otherwise perform step (e1);
(e6) make to reach antifreeze running time and to be in the water pump of antifreeze running status out of service, and perform step (e1).
Of the present invention without negative pressure constant pressure water supply system and method, by utilizing pressure and the variable frequency adjustment booster water pump of city planting ductwork, ensure the situation lower outlet constant pressure that power output is minimum.In addition, the present invention, by detecting water inlet pressure, controls entering water electromagnetic valve openings of sizes, achieves intake pressure constant, thus at utmost can utilize municipal ductwork pressure, both can not produce negative pressure to city planting ductwork, can reduce energy consumption again.Owing to present invention employs water supply tank, therefore without the need to pond, decrease occupation of land, secondary pollution can not be caused to water simultaneously.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the present invention without negative pressure constant pressure water supply system first embodiment.
Fig. 2 is the schematic diagram of the present invention without negative pressure constant pressure water supply system second embodiment.
Fig. 3 is the schematic flow sheet of the present invention without negative pressure constant pressure water supply embodiment of the method.
Fig. 4 is the schematic flow sheet of the embodiment realizing constant water inlet.
Fig. 5 is the schematic flow sheet of many testing pump pressure of supply water.
Fig. 6 is the schematic flow sheet of many water pumps alternate operation.
Fig. 7 is the schematic flow sheet of the antifreeze operation of many water pumps.
Fig. 8 is the schematic diagram of energy saving of system dormancy.
Detailed description of the invention
In order to there be understanding clearly to technical characteristic of the present invention, object and effect, now contrast accompanying drawing and describe the specific embodiment of the present invention in detail.
As shown in Figure 1, be the schematic diagram of the present invention without negative pressure constant pressure water supply system first embodiment.In the present embodiment, water system comprises water supply tank 11, first detecting unit 13, booster water pump 12 and the first control unit 14, and this water system also can comprise the equipment in the existing water system such as water meter, valve certainly.Above-mentioned water supply tank 11 has water inlet and delivery port, wherein water inlet connects city planting ductwork, delivery port connects the booster water pump 12 by transducer drive, first detecting unit 13 is connected to delivery port and for detecting mouth of a river pressure, the first control unit 14 detects the output of the delivery port pressure adjusting frequency converter obtained to control the running of booster water pump 12 according to the first detecting unit 13.
Above-mentioned first detecting unit 13 can for being connected on the electro connecting pressure gauge on outlet pipe, and pressure data can be transferred to the first control unit 14 by it.First control unit 14 comprises frequency computation part subelement and exports control subelement (not shown), wherein frequency computation part subelement is used for detecting according to the first detecting unit 13 the delivery port pressure and preset pressure calculating frequency converter output frequency that obtain, export and control subelement for exporting according to calculating the frequency converter output frequency adjustment frequency converter frequency obtained, thus adjust the rotating speed of booster water pump 12.By the way, the real-time adjustment of water supply pressure is achieved, assure feed water stable water pressure.
As shown in Figure 2, be the schematic diagram of the present invention without negative pressure constant pressure water supply system second embodiment.In the present embodiment, except comprising water supply tank 21, first detecting unit 23, outside booster water pump 22 and the first control unit 24, also comprise electromagnetic valve 25, second detecting unit 26 and the second control unit 27, wherein electromagnetic valve 25 is connected between the water inlet of city planting ductwork and water supply tank 21, second detecting unit 26 is for detecting city planting ductwork intake pressure (i.e. the pressure of supply water of city planting ductwork), second control unit 27 is for detecting according to the second detecting unit 26 openings of sizes that the intake pressure obtained adjusts described electromagnetic valve, thus make system water feeding pressure keep constant.
As shown in Figure 3, be the schematic diagram of the present invention without negative pressure constant pressure water supply method first embodiment, the method is supplied to water end (W.E.) after being used for that pressure adjusting is carried out in city planting ductwork water supply, specifically comprises the following steps:
Step S31: supply water city planting ductwork access water supply tank, and the delivery port of water supply tank is connected with by the booster water pump of transducer drive.
Step S32: detect mouth of a river pressure by the pressure-detecting device being connected to delivery port.
Step S33: according to the output of the delivery port pressure adjusting frequency converter of described detection.In this step, first according to detecting the delivery port pressure and preset pressure calculating frequency converter output frequency that obtain, then export according to calculating the frequency converter output frequency adjustment frequency converter frequency obtained, to adjust the rotating speed of booster water pump, thus assure feed water constant pressure.
In order to keep water supply tank intake pressure constant, as shown in Figure 4, above-mentionedly also can to comprise the following steps without negative pressure constant pressure water supply method:
Step S41: detect city planting ductwork pressure of supply water, i.e. the intake pressure of water supply tank.
Step S42: judge whether city planting ductwork pressure of supply water is greater than setting pressure, if then perform step S43., otherwise perform step S44.
Step S43: the electromagnetic valve opening increasing water supply tank water inlet, to reduce the water entry pressure of water supply tank.
Step S44: judge whether intake pressure equals setting pressure, if so, then returns step S41, otherwise perform step S45.
Step S45: the electromagnetic valve opening reducing water supply tank water inlet, to increase the water entry pressure of water supply tank.
The present invention can be applied to the occasion that booster water pump comprises multiple stage relay pump, and wherein each water pump is by a transducer drive, and now above-mentioned step S32, S33 comprise:
Step S51: detect mouth of a river pressure also according to the delivery port calculation of pressure frequency converter output frequency recorded.
Step S52: judge to calculate the output frequency obtained whether be more than or equal to the upper limiting frequency of the frequency converter being in operating condition and delivery port pressure lower than setting pressure, if then perform step S53, otherwise perform step S54.
Step S53: start one and be in halted state and the longest water pump of dwell time, and return step S51.
Step S54: judge to calculate the output frequency obtained whether be less than the lower frequency limit of the frequency converter being in operating condition and delivery port pressure higher than setting pressure, if then perform step S55, otherwise perform step S56.
Step S55: stop one to be in running status and the duration of runs the longest water pump, and return step S51.
Step S56: adjustment frequency converter frequency exports, and returns step S51.
Comprise the occasion of water pump of multiple stage series connection at booster water pump, in order to avoid water pump to impact the problem in application life because of long time running, said method can comprise the following steps:
Step S61: judge whether to there is the water pump being greater than setting-up time running time, if exist, performs step S62, otherwise returns step S61, continues each water pump of poll to judge each water pump operation time.
Step S62: judge whether to exist the water pump being in halted state, if exist, performs step S63, otherwise returns step S61.
Step S63: select a water pump that downtime is the longest.
Step S64: start the longest water pump of above-mentioned time out of service, the water pump simultaneously making running time the longest is out of service, then returns step S61.
Comprise the water pump of multiple stage series connection and the colder occasion of environment for use at booster water pump, in order to avoid water pump causes line clogging because shutting down for a long time, said method can comprise the following steps:
Step S71: judge whether to exist the water pump being in halted state, if exist, performs step S72, otherwise performs step S74.
Step S72: judge whether the dwell time being in the water pump of halted state is greater than the setting antifreeze time, if then perform step S73, otherwise perform step S71.
Step S73: make this be in halted state and dwell time is greater than the water pump low-frequency operation the antifreeze running time resetting this water pump that set the antifreeze time, and perform step S71.
Step S74: judge whether to exist the water pump being in antifreeze operation, if exist, performs step S75, otherwise performs step S71.
Step S75: judge whether the antifreeze running time being in the water pump of antifreeze running status reaches the scheduled time, if reach, performs step S76, otherwise performs step S71.
S76: make to reach antifreeze running time and to be in the water pump of antifreeze running status out of service, and perform step S71.
In order to save water system energy consumption, above-mentionedly also can to comprise the following steps without negative pressure constant pressure water supply method:
S81: judge whether mouth of a river pressure is more than or equal to capping pressure, if then perform step S82, otherwise performs step S85.
Step S82: judge whether frequency converter running frequency reaches lower frequency limit, if then perform step S83, otherwise returns step S81.
Step S83: judge whether frequency converter reaches the dormancy time of setting running time under lower frequency limit, if reach, performs step S84, otherwise returns step S81.
Step S84: make water system be in sleep state, and return step S81.
Step S85: judge whether mouth of a river pressure is less than setting threshold pression, if then perform step S86, otherwise returns step S81.
Step S86: judge whether water system is in sleep state, if then perform step S87, otherwise returns step S81.
Step S87: judge that water system is in the dormant time and whether reaches wakeup time, if reach, performs step S88, otherwise returns step S81.
Step S88: water system is waken up from sleep state, and return step S81.
By reference to the accompanying drawings embodiments of the invention are described above; but the present invention is not limited to above-mentioned detailed description of the invention; above-mentioned detailed description of the invention is only schematic; instead of it is restrictive; those of ordinary skill in the art is under enlightenment of the present invention; do not departing under the ambit that present inventive concept and claim protect, also can make a lot of form, these all belong within protection of the present invention.
Claims (6)
1., without a negative pressure constant pressure water supply method, being supplied to water end (W.E.) after carrying out pressure adjusting for being supplied water by city planting ductwork, it is characterized in that, comprise the following steps:
A described city planting ductwork supplies water and accesses water supply tank by (), the delivery port of described water supply tank is connected with by the booster water pump of transducer drive;
B () detects mouth of a river pressure by the pressure-detecting device being connected to delivery port, described pressure-detecting device is positioned at the front end of booster water pump;
C () is according to the output of the delivery port pressure adjusting frequency converter of described detection;
Also comprise:
(f1) judge whether mouth of a river pressure is more than or equal to capping pressure, if then perform step (f2), otherwise perform step (f5);
(f2) judge whether frequency converter running frequency reaches lower frequency limit, if then perform step (f3), otherwise return step (f1);
(f3) judge whether frequency converter reaches the dormancy time of setting running time under lower frequency limit, if reach, perform step (f4), otherwise return step (f1);
(f4) make water system be in sleep state, and return step (f1);
(f5) judge whether mouth of a river pressure is less than setting threshold pression, if then perform step (f6), otherwise return step (f1);
(f6) judge whether water system is in sleep state, if then perform step (f7), otherwise return step (f1);
(f7) judge that water system is in the dormant time and whether reaches wakeup time, if reach, perform step (f8), otherwise return step (f1);
(f8) water system is waken up from sleep state, and return step (f1).
2. according to claim 1ly to it is characterized in that without negative pressure constant pressure water supply method, be connected with electromagnetic valve between described water supply tank and city planting ductwork, also comprise: detect city planting ductwork intake pressure also according to intake pressure adjustment electromagnetic valve openings of sizes.
3. according to claim 1ly it is characterized in that without negative pressure constant pressure water supply method, described step (c) comprising:
(c1) according to detecting the delivery port pressure and preset pressure calculating frequency converter output frequency that obtain;
(c2) export according to calculating the frequency converter output frequency adjustment frequency converter obtained.
4. according to claim 3ly it is characterized in that without negative pressure constant pressure water supply method, described booster water pump comprises the water pump of multiple stage series connection, and each water pump is by a transducer drive, and described step (c2) comprising:
(c21) judge to calculate the output frequency obtained whether be more than or equal to the upper limiting frequency of the frequency converter being in operating condition and delivery port pressure lower than setting pressure, if then perform step (c22), otherwise perform step (c23);
(c22) start one and be in halted state and the longest water pump of dwell time, and return step (b);
(c23) judge to calculate the output frequency obtained whether be less than the lower frequency limit of the frequency converter being in operating condition and delivery port pressure higher than setting pressure, if then perform step (c24), otherwise perform step (c25);
(c24) stop one to be in running status and the duration of runs the longest water pump, and return step (b);
(c25) adjust frequency converter frequency to export, and return step (b).
5. according to claim 1ly it is characterized in that without negative pressure constant pressure water supply method, described booster water pump comprises the water pump of multiple stage series connection, further comprising the steps of:
(d1) judge whether to there is the water pump being greater than setting-up time running time, if exist, perform step (d2), otherwise perform step (d1);
(d2) judge whether to exist the water pump being in halted state, if exist, perform step (d3), otherwise return step (d1);
(d3) select a water pump that downtime is the longest and start this water pump, making the water pump being greater than setting-up time running time out of service simultaneously.
6. according to claim 1ly it is characterized in that without negative pressure constant pressure water supply method, described booster water pump comprises the water pump of multiple stage series connection, further comprising the steps of:
(e1) judge whether to exist the water pump being in halted state, if exist, perform step (e2), otherwise perform step (e4);
(e2) judge whether the dwell time being in the water pump of halted state is greater than the setting antifreeze time, if then perform step (e3), otherwise perform step (e1);
(e3) make this be in halted state and dwell time is greater than the water pump low-frequency operation the antifreeze running time resetting this water pump that set the antifreeze time, and perform step (e1);
(e4) judge whether to exist the water pump being in antifreeze operation, if exist, perform step (e5), otherwise perform step (e1);
(e5) judge whether the antifreeze running time being in the water pump of antifreeze running status reaches the scheduled time, if reach, performs step (e6), otherwise perform step (e1);
(e6) make to reach antifreeze running time and to be in the water pump of antifreeze running status out of service, and perform step (e1).
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| CN201110174563.9A CN102852194B (en) | 2011-06-27 | 2011-06-27 | Constant-pressure water supply system and method without negative pressure |
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| CN201110174563.9A CN102852194B (en) | 2011-06-27 | 2011-06-27 | Constant-pressure water supply system and method without negative pressure |
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| CN102852194B true CN102852194B (en) | 2015-03-11 |
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| CN103488082B (en) * | 2013-09-10 | 2015-12-09 | 温州大学 | A kind of high-efficiency frequency conversion constant pressure water supply system control method based on inverse estimation method |
| CN104728123A (en) * | 2015-02-15 | 2015-06-24 | 山东洪涨泵业有限公司 | Vertical multi-stage centrifugal pump and constant-pressure water supply unit |
| CN105133699A (en) * | 2015-08-31 | 2015-12-09 | 深圳市英威腾电气股份有限公司 | Water supply pump frequency-variable control method and system |
| CN107115792A (en) * | 2017-06-09 | 2017-09-01 | 长春莱博帕特科技发展有限公司 | A kind of counter-infiltration current constant pressure water supply system |
| CN107957277A (en) * | 2017-12-21 | 2018-04-24 | 重庆金鑫科技产业发展有限公司 | A kind of detecting system of no negative pressure secondary supply equipment |
| CN111733929A (en) * | 2020-06-29 | 2020-10-02 | 安徽海沃特水务股份有限公司 | Intelligent constant-pressure water supply system |
| CN112058754B (en) * | 2020-08-24 | 2022-04-08 | 阳光新能源开发股份有限公司 | Water cleaning system and control method thereof |
| CN116591265B (en) * | 2023-06-07 | 2023-11-28 | 无锡申海供水设备制造有限公司 | Intelligent control method and system for non-negative pressure secondary water supply equipment |
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