CN108708435A - A kind of frequency conversion water supply facility and method of central water supply system - Google Patents
A kind of frequency conversion water supply facility and method of central water supply system Download PDFInfo
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- CN108708435A CN108708435A CN201810775912.4A CN201810775912A CN108708435A CN 108708435 A CN108708435 A CN 108708435A CN 201810775912 A CN201810775912 A CN 201810775912A CN 108708435 A CN108708435 A CN 108708435A
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- pump machine
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 218
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000006243 chemical reaction Methods 0.000 title claims abstract description 18
- 239000007788 liquid Substances 0.000 claims abstract description 29
- 239000008400 supply water Substances 0.000 claims abstract description 5
- 238000012544 monitoring process Methods 0.000 claims description 19
- 238000005516 engineering process Methods 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000003020 moisturizing effect Effects 0.000 description 3
- 239000002184 metal Substances 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 201000004792 malaria Diseases 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000000116 mitigating effect Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B11/00—Arrangements or adaptations of tanks for water supply
- E03B11/10—Arrangements or adaptations of tanks for water supply for public or like main water supply
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B7/00—Water main or service pipe systems
- E03B7/07—Arrangement of devices, e.g. filters, flow controls, measuring devices, siphons or valves, in the pipe systems
-
- 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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- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Structural Engineering (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
The invention discloses a kind of frequency conversion water supply facility of central water supply system and methods, suitable for central water supply system, the system stability to supply water for ensuring each Water District domain, the frequency conversion water supply facility and method of the central water supply system include control unit, relay I, liquid level sensor, pressure sensor, relay II, water pump machine is connected by relay I and cable with control unit, and water supply pump machine in pond is connected by relay II and cable with control unit；Described control unit includes：Transformer, water level signal converter, frequency converter, PLC controller；Liquid level sensor is installed in pond, is connected by cable and transformer, water level signal converter, frequency converter and the PLC controller in control unit；Pressure sensor is connected with municipal network water supply system and PLC controller respectively by cable.The supply that the present invention improves Water District domain continues water supply capacity, it is ensured that water system is stable, and controllability is higher, and practicability is stronger.
Description
Technical field
The present invention relates to productions and life supply water field, and in particular to a kind of frequency conversion water supply facility of central water supply system
And method.
Background technology
Central water supply system is the important and basic link of production and life, is to ensure that the pass of production and normal operation of living
Key.Such as in recent years, as the continuous promotion of quality of residents'life, living area occupancy rate are continuously increased, water requirement is at multiplication
Long, especially during water use peak phase on and off duty and festivals or holidays, general hydrotechny system is sometimes difficult to meet existing
Daily water consumption amount；In addition, if water facilities longtime running replaces in high load capacity or water use peak ebb, ageing equipment phenomenon
It will be on the rise, failure will take place frequently, and the phenomenon that will cause to cut off the water emerges one after another.
Under normal circumstances, pond water-holding capacity be the key that supply water it is stable, due to each living area pool volume size not
One, therefore, only reliable and stable water system is only the key condition for ensureing its water-holding capacity.Traditional pond liquid level start and stop
Based on pattern is mostly detected with buoy, principle is：Using its in pond can buoy, according to the change of water level height difference, inside buoy
Metal probe can incude SEA LEVEL VARIATION, then, controlled and intake according to the variation of buoy signal, final to realize that full-water level is cut off the water, and lack
The control mode of water level moisturizing.But foot point is not this traditional control mode：Water level fluctuation when due to being intake by pond
Influence, the control signal that induces of buoy interior metal probe becomes unstable, the command signal for making control system receive
It is unstable, therefore, cause water supply pump machine start and stop excessively frequent, is chronically at the overload state of this alternately start and stop, leads to water
Pump machine damage or spilling water etc..
Furthermore if due to being replaced when buoy damage has little time, system acceptance error signal makes script pond be in full water
Position need to stop moisturizing, but since the full water bit line of buoy is damaged, make pump machine that can not stop moisturizing, cause to cause when the full water of pond
Spilling water；Contrary circumstance, it will cause pond water shortages, and What is more, pump machine can be caused to dally, and the pump housing sucks large quantity of air,
Keep pump machine coil temperature excessively high, is easy to burn, internal impeller and bearing can also be damaged, etc..
In addition, the inspection and monitoring of traditional pond liquid level variation, need scene to check on the spot, and it is both time-consuming and laborious, it increases
Cost of labor.
For above-mentioned present situation, multiple technologies solution also proposed in the prior art, for example add wireless module auxiliary
Enhance the schemes such as signal, these schemes, process is cumbersome, device line is fragile, signal transmission is by ring because wireless module is added
Border factor influence is excessive, not applicable.
In conclusion to realize that the water supply of central water supply system is stablized, working efficiency is improved, water supply failure is avoided the occurrence of, is studied
Variable frequency water supply method has important technology meaning and application value.
Invention content
In order to solve the problems, such as background technology, the present invention provides a kind of variable frequency water supply of central water supply system dresses
It sets and method is specifically to ensure that the system stability of each Water District domain supply, avoids water resource unrestrained suitable for central water supply system
Take, reduce cost, while realizing intelligent management, in favor of Daily Round Check and maintenance, improves working efficiency.
The present invention is based on pressure sensor, the intake pressure of field survey municipal network water supply system, is ensureing foot
Under the premise of enough water inlets, water level in water pool is measured using liquid level sensor, according to the difference of each Water District domain situation, is being controlled
By arrange parameter balancing tank reservoir storage on the panel of the multifunctional digital control system of unit processed, and pass through monitoring water level system
System monitors SEA LEVEL VARIATION in real time, and the failure of appearance is analyzed and restored using the monitoring system of control unit, together
Shi Shixian ensures daily water supply, and makees comprehensive management to the water system.
To achieve the above object, the present invention adopts the following technical scheme that realization：
The frequency conversion water supply facility and method of the central water supply system include pond, and pond is equipped with pond feed pipe, and pond supplies
Water pipe is connect with pond water supply pump machine water outlet, and pond water supply pump machine water inlet end is connect with municipal network water supply system, pool bottom
User feed water inlet is arranged in portion, and water pump machine is arranged on user feed water inlet, and gap is arranged on basin side wall, is highly H4, described
The frequency conversion water supply facility and method of central water supply system further include control unit, relay I, liquid level sensor, pressure sensor,
Relay II, water pump machine are connected by relay I and cable with control unit, and water supply pump machine in pond passes through relay II and cable
It is connected with control unit；
Described control unit includes：Transformer, water level signal converter, frequency converter, PLC controller；Liquid level sensor is installed on
It is H1 away from basin bottom distance in pond, passes through transformer, water level signal converter, the frequency converter in cable and control unit
It is connected with PLC controller；Pressure sensor is connected with municipal network water supply system and PLC controller respectively by cable.
Preferably, liquid level sensor is installed on pool inner wall, apart from basin bottom H1 values, H1 value ranges 100
300mm, set pond low water level lower limit as H2 and the high water level upper limit be H3, wherein H3>H2>H1, high water level upper limit H3 values are less than
Spilling water open height H4 value about 100mm, low water level lower limit H2 values are more than about 100 200mm of liquid level sensor position H1 values.
, can be in PLC controller operation preferably, the level measuring data variation of liquid level sensor, and it can be multi-functional
It is shown on digital display and the digital display control panel of control system.
Preferably, when the water level in pond is less than lower limit H2, PLC controller controls pond water supply pump by relay
Machine passes through the water filling into pond from pond feed pipe；When the water level in pond is higher than lower limit H3, PLC controller passes through relay
Control pond water supply pump machine stops the water filling into pond.
Preferably, with the variation of water level in water pool, liquid level sensor signal changes therewith, then passes through PLC controller and change
Frequency device, frequency control water pump machine provide stable hydraulic pressure to user feed water inlet.
Preferably, by the hydraulic pressure of determination of pressure sensor municipal network water supply system, controlled by PLC according to measured value
Device and frequency converter processed, water supply pump machine in frequency control pond is to pond water filling.
Preferably, the PLC controller access multifunctional digital and control system, the access monitoring of cell phone application client
System IP client, monitoring system IP client access multifunctional digital and control system again.
Preferably, Water-Level Supervising System IP client can be connected to multiple multifunctional digitals and control system, it can be achieved that more
The monitoring water level in a pond is implanted into software, sharing and control to Water-Level Supervising System IP client in cell phone application client.
Beneficial effects of the present invention：
1, the present invention can realize that variable frequency water supply, stable water pressure can be such that the water system of each section more stablizes, ensure living area
Feed cistern water-holding capacity.
2, simple to install of the present invention, equipment maintenance program is simple, and pressure sensor monitoring ability accuracy is higher, can
It is selected according to the difference of each living area intake pressure, flexibility is higher, thereby it is ensured that the efficient stable of water filling.
3, liquid level sensor of the invention monitoring water level ability accuracy is higher, can be accurate to millimeter, can be according to pond
Water-holding capacity or height of water level select different types of inductor；Multifunctional digital and control system can show intake pressure simultaneously
Value and waterlevel data carry out water level protection while ensureing to intake by the parameter setting of Water-Level Supervising System IP client
And monitoring, realize more pond monitoring, and monitored in real time to pond liquid level by computer, tour personnel can be straight by interface
It connects and accurate measurements is carried out to water level.
4, the present invention can realize the remote monitoring system of water level.It can in time be adjusted, be kept away according to pond actual water level
Exempt from water level in water pool it is too low caused by water shortage；Cell phone application client is implanted into software, long-range and mobile monitor can be realized, by special
People carries out real-time control by independent channel, has ensured controllability and the flexibility of system, significant effect.
To sum up, the present invention has the characteristics that simple in structure, using flexible, has positive effect to providing water system ability, right
Mitigating tour employee's workload has apparent actual effect, improves the safety of water facilities equipment, avoids traditional buoy control water
The problems such as water resource waste and maintenance form are cumbersome caused by position, maintenance cost is excessively high and spoilage is higher.
Description of the drawings
Fig. 1 is the variable frequency water supply principle schematic of the present invention；
Fig. 2 is liquid level sensor installation and the schematic diagram of water level control range of the present invention；
Fig. 3 is the control unit structure and its control principle drawing of the present invention；
In figure：Control unit 1, relay 2, liquid level sensor 3, pond 4, user feed water inlet 5, water pump machine 6, gap 7, pond
Feed pipe 8, pond water supply pump machine 9, municipal network water supply system 10, pressure sensor 11, relay 13, transformer 16, water level
Signal adapter 17, frequency converter 18, PLC controller 19, multifunctional digital and control system 20, Water-Level Supervising System IP client
21, cell phone application client 22.
Specific implementation mode
In order to keep the purpose of the present invention, technical solution and advantageous effect clearer, below in conjunction with attached drawing, to the present invention
Preferred embodiment be described in detail, to facilitate the technical staff to understand.
As shown in Figs. 1-3, the frequency conversion water supply facility of the central water supply system and method include pond 4, and pond 4 is equipped with
Pond feed pipe 8, pond feed pipe 8 are connect with 9 water outlet of pond water supply pump machine, and 9 water inlet end of pond water supply pump machine is supplied with municipal administration
Grid system 10 connects, and user feed water inlet 5 is arranged in 4 bottom of pond, water pump machine 6 is arranged on user feed water inlet 5, gap 7 is set
Set on 4 side wall of pond, be highly H4, the frequency conversion water supply facility and method of the central water supply system further include control unit 1,
Relay I 2, liquid level sensor 3, pressure sensor 11, relay II 13, water pump machine 6 pass through relay I 2 and cable and control
Unit 1 is connected, and pond water supply pump machine 9 is connected by relay II 13 and cable with control unit 1；Described control unit 1 includes：
Transformer 16, water level signal converter 17, frequency converter 18, PLC controller 19；Liquid level sensor 3 is installed in pond 4, away from water
4 distance from bottom of pond is H1, by transformer 16 in cable and control unit 1, water level signal converter 17, frequency converter 18 with
PLC controller 19 is connected；Pressure sensor 11 by cable respectively with 19 phase of municipal network water supply system 10 and PLC controller
Connection, the maximum allowable stress of pressure sensor 11 need to be on intake pressure.
As Figure 2-3, liquid level sensor 3 is installed on 4 inner wall of pond, apart from basin bottom H1 values, H1 value ranges
100 300mm, set 4 low water level lower limit of pond as H2 and the high water level upper limit be H3, wherein H3>H2>H1, high water level upper limit H3
Value is less than 7 position H4 values about 100mm of gap, and low water level lower limit H2 values are more than 3 position H1 values about 100 of liquid level sensor
200mm.The level measuring data variation of liquid level sensor 3, can be in 19 operation of PLC controller, and can be in multifunctional digital and control
It is shown on the digital display control panel of system 20 processed.
As shown in Fig. 2, when the water level in pond 4 is less than lower limit H2, PLC controller 19 controls pond by relay 13 and supplies
Water pump machine 9, by from the water filling into pond 4 of pond feed pipe 8；When the water level in pond 4 is higher than lower limit H3, PLC controller 19
Pond water supply pump machine 9, which is controlled, by relay 13 stops the water filling into pond 4.
As shown in Figs. 1-3, with the variation of 4 water level of pond, 3 signal of liquid level sensor changes therewith, water level signal converter
Water level signal is delivered to PLC controller 19 by 17, and PLC controller 19 is supplied by 18 frequency control water pump machine 6 of frequency converter to user
The mouth of a river 5 provides stable hydraulic pressure, realizes variable frequency water supply；The pressure sensor 11 by cable respectively with municipal network water supply system
System 10 and PLC controller 19 are connected, and the hydraulic pressure of municipal network water supply system 10 is measured by pressure sensor 11, PLC controller 19
According to hydraulic pressure mensuration value frequency conversion water filling is realized by 18 frequency control pond water supply pump machine 9 of frequency converter to 4 water filling of pond.
Such as Fig. 3, the PLC controller 19 accesses multifunctional digital and control system 20, the access prison of cell phone application client 22
Control system IP client 21, monitoring system IP client 21 access multifunctional digital and control system 20 again.Wherein, monitoring water level
System IP client 21 can be connected to multiple multifunctional digitals and control system 20, it can be achieved that multiple ponds 4 monitoring water level, in hand
Machine APP clients 22 are implanted into software, it can be achieved that sharing and control to Water-Level Supervising System IP client 21, realizes the remote of water level
Range monitoring system.
Particularly, by the way that pressure sensor is arranged on user feed water inlet 5, the pressure value of user feed water inlet 5 is really accurate
It is really shown on multifunctional digital and the multi-functional control digital display meter of control system 20, which must not exceed each user and supply water
2 7Mpa of pipeline tolerance range；Liquid level sensor 3, which measures water level, to be consistent with pond actual water level data, must not exceed cell
Each cistern full water bit line.Liquid level sensor 3 measures existing deviation between waterlevel data and pond actual water level corresponding data,
It can be determined by experiment, and the Introduced Malaria value in PLC programmings.
The present invention is suitable for central water supply system, is specifically to ensure that the system stability of each Water District domain supply, avoids water
The wasting of resources reduces cost, while realizing intelligent management, in favor of Daily Round Check and maintenance, improves working efficiency.
Finally illustrate, preferred embodiment above is merely illustrative of the technical solution of the present invention and unrestricted, although logical
It crosses above preferred embodiment the present invention is described in detail, however, those skilled in the art should understand that, can be
Various changes are made to it in form and in details, without departing from claims of the present invention limited range.
Claims (8)
1. the frequency conversion water supply facility and method of a kind of central water supply system, including pond（4）, pond（4）Pond is equipped with to supply water
Pipe（8）, pond feed pipe（8）With pond water supply pump machine（9）Water outlet connects, pond water supply pump machine（9）Water inlet end is supplied with municipal administration
Grid system（10）Connection, pond（4）User feed water inlet is arranged in bottom（5）, user feed water inlet（5）Upper setting water pump machine（6）,
Gap（7）It is arranged in pond（4）It is highly H4 on side wall, it is characterised in that：The variable frequency water supply of the central water supply system fills
It sets and method further includes control unit（1）, relay I（2）, liquid level sensor（3）, pressure sensor（11）, relay II
（13）, water pump machine（6）Pass through relay I（2）And cable and control unit（1）It is connected, pond water supply pump machine（9）Pass through relay
Ⅱ（13）And cable and control unit（1）It is connected；
Described control unit（1）Including：Transformer（16）, water level signal converter（17）, frequency converter（18）, PLC controller
（19）；Liquid level sensor（3）It is installed on pond（4）In, away from pond（4）Distance from bottom is H1, passes through cable and control unit（1）
In transformer（16）, water level signal converter（17）, frequency converter（18）With PLC controller（19）It is connected；Pressure sensor
（11）By cable respectively with municipal network water supply system（10）And PLC controller（19）It is connected.
2. the frequency conversion water supply facility and method of a kind of central water supply system according to claim 1, it is characterised in that：Liquid level
Sensor（3）It is installed on pond（4）Inner wall, apart from basin bottom H1 values, 100 300mm of H1 value ranges, the low water in setting pond
Position lower limit is H2 and the high water level upper limit is H3, wherein H3>H2>H1, high water level upper limit H3 values are less than gap（7）Height H4 values are about
100mm, low water level lower limit H2 values are more than liquid level sensor（3）About 100 200mm of position H1 values.
3. the frequency conversion water supply facility and method of a kind of central water supply system according to claim 1, it is characterised in that：Liquid level
Sensor（3）Level measuring data variation, can be in PLC controller（19）Operation, and can be in multifunctional digital and control system
（20）Digital display control panel on show.
4. the frequency conversion water supply facility and method of a kind of central water supply system according to claim 1, it is characterised in that：Work as water
Pond（4）Water level be less than lower limit H2 when, PLC controller（19）By relay（13）Control pond water supply pump machine（9）, by by
Pond feed pipe（8）To pond（4）Interior water filling；When the water level in pond is higher than lower limit H3, PLC controller（19）By relay
（13）Control pond water supply pump machine（9）Stop to pond（4）Interior water filling.
5. the frequency conversion water supply facility and method of a kind of central water supply system according to claim 1, it is characterised in that：With water
Pond（4）The variation of water level, liquid level sensor（3）Signal changes therewith, then passes through PLC controller（19）And frequency converter（18）, become
Frequency control water pump machine（6）, to user feed water inlet（5）Stable hydraulic pressure is provided.
6. the frequency conversion water supply facility and method of a kind of central water supply system according to claim 1, it is characterised in that：Pass through
Pressure sensor（11）Measure municipal network water supply system（10）Hydraulic pressure, PLC controller is passed through according to measured value（19）And change
Frequency device（18）, frequency control pond water supply pump machine（9）To pond（4）Water filling.
7. the frequency conversion water supply facility and method of a kind of central water supply system according to claim 1, it is characterised in that：It is described
PLC controller（19）Access multifunctional digital and control system（20）, cell phone application client（22）Access monitoring system IP client
End（21）, monitoring system IP client（21）Multifunctional digital and control system are accessed again（20）.
8. the frequency conversion water supply facility and method of a kind of central water supply system according to claim 1, it is characterised in that：Water level
Monitoring system IP client（21）Multiple multifunctional digitals and control system can be connected to（20）, it can be achieved that multiple ponds（4）Water
Position monitoring, in cell phone application client（22）It is implanted into software, to Water-Level Supervising System IP client（21）Share and control.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810775912.4A CN108708435A (en) | 2018-07-16 | 2018-07-16 | A kind of frequency conversion water supply facility and method of central water supply system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810775912.4A CN108708435A (en) | 2018-07-16 | 2018-07-16 | A kind of frequency conversion water supply facility and method of central water supply system |
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| Publication Number | Publication Date |
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| CN108708435A true CN108708435A (en) | 2018-10-26 |
Family
ID=63874145
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810775912.4A Pending CN108708435A (en) | 2018-07-16 | 2018-07-16 | A kind of frequency conversion water supply facility and method of central water supply system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113089776A (en) * | 2021-04-14 | 2021-07-09 | 殷晓岚 | Water supply device and water supply method |
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|---|---|---|---|---|
| JPH07229178A (en) * | 1994-02-21 | 1995-08-29 | Matsushita Electric Works Ltd | Feed water control device |
| CN202850121U (en) * | 2012-07-05 | 2013-04-03 | 成都宁水科技有限公司 | Combination water supply system |
| CN103388350A (en) * | 2012-05-11 | 2013-11-13 | 四川优的科技有限公司 | Frequency-conversion constant-pressure water supply system based on PLC (Programmable Logic Controller) |
| CN203795530U (en) * | 2014-02-26 | 2014-08-27 | 安徽工程大学 | Variable-frequency constant-pressure water supply fuzzy control system based on PLC |
| CN204139251U (en) * | 2014-09-11 | 2015-02-04 | 西北民族大学 | Based on the constant pressure water supply system of PLC |
| CN205189042U (en) * | 2015-11-17 | 2016-04-27 | 安徽舜禹水务股份有限公司 | Novel can set for water supply system that avoids peak hour |
| CN105756135A (en) * | 2016-04-22 | 2016-07-13 | 北京石油化工学院 | Frequency conversion constant pressure water supplying intelligent control system based on Internet of Things |
| CN207331864U (en) * | 2017-10-09 | 2018-05-08 | 李天阳 | A kind of novel constant-pressure water system |
| CN208563458U (en) * | 2018-07-16 | 2019-03-01 | 红塔烟草(集团)有限责任公司 | A kind of frequency conversion water supply facility of central water supply system |
-
2018
- 2018-07-16 CN CN201810775912.4A patent/CN108708435A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07229178A (en) * | 1994-02-21 | 1995-08-29 | Matsushita Electric Works Ltd | Feed water control device |
| CN103388350A (en) * | 2012-05-11 | 2013-11-13 | 四川优的科技有限公司 | Frequency-conversion constant-pressure water supply system based on PLC (Programmable Logic Controller) |
| CN202850121U (en) * | 2012-07-05 | 2013-04-03 | 成都宁水科技有限公司 | Combination water supply system |
| CN203795530U (en) * | 2014-02-26 | 2014-08-27 | 安徽工程大学 | Variable-frequency constant-pressure water supply fuzzy control system based on PLC |
| CN204139251U (en) * | 2014-09-11 | 2015-02-04 | 西北民族大学 | Based on the constant pressure water supply system of PLC |
| CN205189042U (en) * | 2015-11-17 | 2016-04-27 | 安徽舜禹水务股份有限公司 | Novel can set for water supply system that avoids peak hour |
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| CN208563458U (en) * | 2018-07-16 | 2019-03-01 | 红塔烟草(集团)有限责任公司 | A kind of frequency conversion water supply facility of central water supply system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113089776A (en) * | 2021-04-14 | 2021-07-09 | 殷晓岚 | Water supply device and water supply method |
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Application publication date: 20181026 |
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| RJ01 | Rejection of invention patent application after publication |