CN107700585A - A kind of tap water flow control system - Google Patents
A kind of tap water flow control system Download PDFInfo
- Publication number
- CN107700585A CN107700585A CN201710806217.5A CN201710806217A CN107700585A CN 107700585 A CN107700585 A CN 107700585A CN 201710806217 A CN201710806217 A CN 201710806217A CN 107700585 A CN107700585 A CN 107700585A
- Authority
- CN
- China
- Prior art keywords
- water
- connecting tube
- current regulator
- stable current
- water pump
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000008399 tap water Substances 0.000 title claims abstract description 28
- 235000020679 tap water Nutrition 0.000 title claims abstract description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 139
- 239000007788 liquid Substances 0.000 claims abstract description 13
- 230000001629 suppression Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 2
- 208000034699 Vitreous floaters Diseases 0.000 description 6
- 239000000523 sample Substances 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000007726 management method Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B1/00—Methods or layout of installations for water supply
- E03B1/02—Methods or layout of installations for water supply for public or like main supply for industrial use
-
- 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
-
- 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
- E03B7/071—Arrangement of safety devices in domestic pipe systems, e.g. devices for automatic shut-off
-
- 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
- E03B7/072—Arrangement of flowmeters
-
- 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
- E03B7/075—Arrangement of devices for control of pressure or flow rate
-
- 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
- E03B7/077—Arrangement of backflow preventing devices
-
- 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
- E03B7/078—Combined units with different devices; Arrangement of different devices with respect to each other
Landscapes
- 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)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Jet Pumps And Other Pumps (AREA)
Abstract
The invention discloses a kind of tap water flow control system; including stable current regulator, variable frequency water supply switch board, the second water pump, distance-transmission pressure gauge; the stable current regulator connects with water inlet pipe; the upper end of the stable current regulator is equiped with vacuum suppresser and pressure gauge respectively; the inside of the stable current regulator is provided with anhydrous shutdown liquid-level floater; and anhydrous shutdown liquid-level floater is connected by connecting line with vacuum suppresser, the second water pump, vacuum suppresser and the distance-transmission pressure gauge are connected by wire with external variable frequency water supply switch board；When water or when cutting off the water, signal is fed back to frequency-variable controller, water pump Auto Power On or shutdown by level sensor, to protect water pump assembly.When night low discharge supplies water and tap water pipe network pressure can not meet to require, air pressure tank can be stored and released energy, and avoid water pump frequent starting, so both ensure the stability that can be supplied water, and realize the effect of good energy-saving and emission-reducing again.
Description
Technical field
The present invention relates to hydrotechny field, and in particular to a kind of tap water flow control system.
Background technology
At present, non-negative pressure frequency-changing water supply device is using city planting ductwork as water source, takes full advantage of the original pressure of city planting ductwork
Power, closed continuous relay supercharging way of supplying water is formed, good energy-conserving effect, is that frequency-changing pressure stabilizing supplies without the secondary pollution of water quality
The development and extension of wetting system.Water supply is directly laminated on the basis of municipal ductwork pressure, saves the energy, and also there is full envelope
Close, be pollution-free, many advantages, such as occupation of land amount is small, quick for installation, reliable, easy to maintenance, and current supply equipment is supplying
It is unstable often to occur water-carrying capacity during water, when it is big when it is small, especially in the water use peak period, there is hair when high-rise buildings are cut off the water supply
It is raw.
The content of the invention
The invention aims to solve the problems of the prior art, and a kind of tap water flow control system proposed
System.
To achieve these goals, present invention employs following technical scheme：A kind of tap water flow control system, including
Stable current regulator, variable frequency water supply switch board, water pump, distance-transmission pressure gauge, the stable current regulator connect with water inlet pipe, the current stabilization
The upper end of adjuster is equiped with vacuum suppresser and pressure gauge respectively, and the inside of the stable current regulator is provided with anhydrous shutdown liquid level
Ball float, and anhydrous shutdown liquid-level floater is connected by connecting line with vacuum suppresser, the lower end of the stable current regulator is provided with row
Dirty valve, the lower end of the stable current regulator are additionally provided with the 4th connecting tube, the described one end of first connecting tube away from stable current regulator
Provided with the second connecting tube, three feed pipes are communicated with second connecting tube, on two of which feed pipe from bottom to top successively
Provided with butterfly valve, connecting hose, water pump and another butterfly valve, connecting hose and electricity are respectively equipped with from top to bottom on another described feed pipe
Magnet valve, the one end of the feed pipe away from the second connecting tube are connected with the 5th connecting tube, installed in the 5th connecting tube jointly
There is distance-transmission pressure gauge, one end of the 5th connecting tube is connected with the 3rd connecting tube, and the 3rd connecting tube is away from the 5th connection
One end of pipe is provided with voltage-stabilizing compensator, and the other end of the 5th connecting tube is connected with outlet pipe by water outlet butterfly valve, it is described go out
Equidistant on water pipe to be equiped with some depotition cocks, the water pump, vacuum suppresser and distance-transmission pressure gauge are by wire and outside
The variable frequency water supply switch board connection put.
Check-valves is equipped between the butterfly valve and connecting hose, between the second water pump and connecting hose.
In the present invention, the water of tap water pipe network enters stable current regulator, and air is discharged from vacuum suppresser in tank, treats that water is full of
Afterwards, vacuum suppresser is closed automatically.When tap water pipe network pressure disclosure satisfy that with water requirement, system from bypass check valve to
Grid directly supplies water；When tap water pipe network pressure can not meet to be required with water, system pressure signal is anti-by distance-transmission pressure gauge
Feed frequency-variable controller, water pump operation, and rotating speed constant pressure water supply is automatically adjusted according to the size of water consumption, if operating water pump reaches
During power frequency rotating speed, then start another pump variable frequency operating.When water pump supplies water, if the water of tap water pipe network is more than water pump stream
Amount, system keep normal water supply：During water use peak, if tap water pipe network water is less than small pump discharge amount, in stable current regulator
Water as make-up water source still can normal water supply, now, air enters stable current regulator by vacuum suppresser, in tank vacuum by
Destroy, it is ensured that tap water pipe network does not produce negative pressure, and after water use peak, system returns to normal water supply state again.When originally
Grid is cut off the water, and causes stable current regulator liquid level constantly to decline, and signal is fed back to frequency-variable controller by level sensor, and water pump is certainly
It is dynamic to shut down, to protect water pump assembly.Night low discharge supplies water and tap water pipe network pressure is when can not meet to require, air pressure tank can be with
Store and release energy, avoid water pump frequent starting, the present invention can monitor regulation grid pressure and water-carrying capacity in real time, really
Stable water supply is protected, there is good popularizing action.
Brief description of the drawings
Fig. 1 is a kind of structural representation of tap water flow control system proposed by the present invention.
Fig. 2 is a kind of application of the tap water flow control system proposed by the present invention in non-negative pressure frequency-changing water supply device
Structural representation.
In figure：1 water inlet pipe, 2 intake pipes, 3 water outlet probe tubes, 4 water tanks, 5 stable current regulators, 6 blowoff valves, the suppression of 7 vacuum
Device processed, the 8 anhydrous liquid-level floaters, 9 first water pumps, 10 first connecting water pipes, 11 feed pipes, 12 second connecting water pipes, 13 soft of shutting down
Joint, 14 second water pumps, 15 check-valves, 16 butterfly valves, 17 the 3rd connecting tubes, 18 voltage-stabilizing compensators, 19 magnetic valves, 20 teletransmission pressure
Table, 21 water outlet butterfly valves, 22 outlet pipes, 23 depotition cocks, 24 variable frequency water supply switch boards.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.
Embodiment 1
Reference picture 1, a kind of tap water flow control system, including stable current regulator（5）, variable frequency water supply switch board（24）, water pump
（14）, distance-transmission pressure gauge（20）, the stable current regulator（5）With water inlet pipe（11）Connection, the stable current regulator（5）Upper end
Vacuum suppresser is equiped with respectively（7）And pressure gauge, the stable current regulator（5）Inside be provided with anhydrous shutdown liquid-level floater
（8）, and anhydrous shutdown liquid-level floater（8）Pass through connecting line and vacuum suppresser（7）Connection, the stable current regulator（5）Under
End is provided with blowoff valve（6）, the stable current regulator（5）Lower end be additionally provided with the 4th connecting tube, first connecting tube is away from steady
Throttle regulator（5）One end be provided with the second connecting tube（12）, second connecting tube（12）On be communicated with three feed pipes（11）,
Two of which feed pipe（11）On be sequentially provided with butterfly valve from bottom to top（16）, connecting hose（13）, water pump（14）With another butterfly valve
（16）, another described feed pipe（11）On be respectively equipped with connecting hose from top to bottom（13）And magnetic valve（19）, the feed pipe
（11）Away from the second connecting tube（12）One end be connected with the 5th connecting tube jointly, be equiped with teletransmission pressure in the 5th connecting tube
Power table（20）, one end of the 5th connecting tube is connected with the 3rd connecting tube（17）, the 3rd connecting tube（17）Away from the 5th
One end of connecting tube is provided with voltage-stabilizing compensator（18）, the other end of the 5th connecting tube passes through water outlet butterfly valve（21）It is connected with out
Water pipe（22）, the outlet pipe（22）It is above equidistant to be equiped with some depotition cocks（23）, the water pump（11）, vacuum suppresser
（7）And distance-transmission pressure gauge（20）Pass through wire and external variable frequency water supply switch board（24）Connection.
The butterfly valve（16）And connecting hose（13）Between, water pump（14）And connecting hose（13）Between be equipped with check-valves
（15）.
Embodiment 2
A kind of reference picture 2, tap water flow control system, the application in non-negative pressure frequency-changing water supply device, is specifically included into water
Pipe 1, is provided with two control valves on water inlet pipe 1, is provided with intake pipe 2 on the water inlet pipe 1 between two control valves, fetches water
The one end of pipe 2 away from water inlet pipe 1 is connected with water tank 4, and the inside of water tank 4 is provided with three parallel hang plates from top to bottom,
The water outlet probe tube 3 with three hang plate position correspondences is equiped with the side wall of water tank 4, one end of water inlet pipe 1 is communicated with surely
Throttle regulator 5, the upper end of stable current regulator 5 are equiped with vacuum suppresser 7 and pressure gauge respectively, and the inside of stable current regulator 5 is set
There is anhydrous shutdown liquid-level floater 8, and anhydrous shutdown liquid-level floater 8 is connected by connecting line and vacuum suppresser 7, stable current regulator
5 lower end is provided with blowoff valve 6, and the lower end of stable current regulator 5 is additionally provided with the 4th connecting tube, and the first connecting tube is away from stable current regulator
5 one end is provided with the second connecting tube 12, is communicated with three feed pipes 11 in the second connecting tube 12, on two of which feed pipe 11 from
It is lower and on be sequentially provided with butterfly valve 16, connecting hose 13, the second water pump 14 and another butterfly valve 16, on another feed pipe 11 from upper and
Under be respectively equipped with connecting hose 13 and magnetic valve 19, the one end of feed pipe 11 away from the second connecting tube 12 is connected with the 5th connection jointly
Pipe, one end of the 5th connecting tube are connected with the 3rd connecting tube 17, and the 3rd one end of connecting tube 17 away from the 5th connecting tube is provided with steady
Press compensator 18, the other end of the 5th connecting tube is connected with outlet pipe 22 by water outlet butterfly valve 21, equidistant dress on outlet pipe 22
Provided with some depotition cocks 23, the first water pump 9, the second water pump 14 and vacuum suppresser 7 are supplied by wire and external frequency conversion
Water management cabinet 24 connects, and between butterfly valve 16 and connecting hose 13, is equipped with check-valves 15 between the second water pump and connecting hose 13, and the 5th
Distance-transmission pressure gauge 20 is equiped with connecting tube, and distance-transmission pressure gauge 20 is connected by wire and external variable frequency water supply switch board 24
Connect, the first connecting tube 10, inside of first connecting tube 10 with water tank 4 are equiped with the connecting tube 12 of outlet pipe 22 and second
Connection, and the delivery port of the first connecting tube 10 is located at the downside of two hang plates of upside, the second connecting tube 12 and the first connection
The first water pump 9 is provided between pipe 10, between intake pipe 2 and water tank 4, between the first water pump 9 and the second connecting tube 12, the 5th connect
Valve is equipped between adapter and the 3rd connecting tube 17, between the first connecting tube 10 and water tank 4, is also filled on water outlet probe tube 3
Provided with valve.
In the present invention, the water of tap water pipe network enters stable current regulator 5, and air is discharged from vacuum suppresser in tank, treats water
After being full of, vacuum suppresser 7 is closed automatically.When tap water pipe network pressure disclosure satisfy that with water requirement, system is by bypass non-return
Valve directly supplies water to grid；When tap water pipe network pressure can not meet to be required with water, system pressure signal is by teletransmission pressure
Power table feeds back to frequency-variable controller, water pump operation, and automatically adjusts rotating speed constant pressure water supply according to the size of water consumption, if operating water
When pump reaches power frequency rotating speed, then start another pump variable frequency operating.When water pump supplies water, if the water of tap water pipe network is more than water
Pump discharge, system keep normal water supply：During water use peak, if tap water pipe network water is less than pump capacity, in stable current regulator 5
Water as make-up water source still can normal water supply, now, air enters stable current regulator 5 by vacuum suppresser 7, vacuum in tank
Destroyed, it is ensured that tap water pipe network does not produce negative pressure, and after water use peak, system returns to normal water supply state again.When
Tap water pipe network is cut off the water, and causes stable current regulator liquid level constantly to decline, and signal is fed back to frequency-variable controller, water by level sensor
Pump autostop, to protect water pump assembly.When night low discharge supplies water and tap water pipe network pressure can not meet to require, air pressure tank
It can store and release energy, avoid water pump frequent starting, and in water inlet pipe 1, the second connecting tube 12 and the 5th connecting tube
On connected by the first connecting tube 10 with water tank, the detection of water quality is carried out to the water of different processes, adds the peace of water quality
Quan Xing.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,
Any one skilled in the art the invention discloses technical scope in, technique according to the invention scheme and its
Inventive concept is subject to equivalent substitution or change, should all be included within the scope of the present invention.
Claims (2)
1. a kind of tap water flow control system, including stable current regulator（5）, variable frequency water supply switch board（24）, water pump（14）, it is remote
Pass pressure gauge（20）, it is characterised in that：The stable current regulator（5）With water inlet pipe（11）Connection, the stable current regulator（5）'s
Upper end is equiped with vacuum suppresser respectively（7）And pressure gauge, the stable current regulator（5）Inside be provided with it is anhydrous shutdown liquid level float
Ball（8）, and anhydrous shutdown liquid-level floater（8）Pass through connecting line and vacuum suppresser（7）Connection, the stable current regulator（5）'s
Lower end is provided with blowoff valve（6）, the stable current regulator（5）Lower end be additionally provided with the 4th connecting tube, first connecting tube is remote
Stable current regulator（5）One end be provided with the second connecting tube（12）, second connecting tube（12）On be communicated with three feed pipes
（11）, two of which feed pipe（11）On be sequentially provided with butterfly valve from bottom to top（16）, connecting hose（13）, water pump（14）And another
Butterfly valve（16）, another described feed pipe（11）On be respectively equipped with connecting hose from top to bottom（13）And magnetic valve（19）, the confession
Water pipe（11）Away from the second connecting tube（12）One end be connected with the 5th connecting tube jointly, be equiped with the 5th connecting tube remote
Pass pressure gauge（20）, one end of the 5th connecting tube is connected with the 3rd connecting tube（17）, the 3rd connecting tube（17）It is remote
One end of 5th connecting tube is provided with voltage-stabilizing compensator（18）, the other end of the 5th connecting tube passes through water outlet butterfly valve（21）Connection
There is outlet pipe（22）, the outlet pipe（22）It is above equidistant to be equiped with some depotition cocks（23）, the water pump（11）, vacuum suppression
Device processed（7）And distance-transmission pressure gauge（20）Pass through wire and external variable frequency water supply switch board（24）Connection.
A kind of 2. tap water flow control system according to claim 1, it is characterised in that the butterfly valve（16）Connect with soft
Head（13）Between, water pump（14）And connecting hose（13）Between be equipped with check-valves（15）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710806217.5A CN107700585A (en) | 2017-09-08 | 2017-09-08 | A kind of tap water flow control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710806217.5A CN107700585A (en) | 2017-09-08 | 2017-09-08 | A kind of tap water flow control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107700585A true CN107700585A (en) | 2018-02-16 |
Family
ID=61172291
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710806217.5A Pending CN107700585A (en) | 2017-09-08 | 2017-09-08 | A kind of tap water flow control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107700585A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108755848A (en) * | 2018-08-16 | 2018-11-06 | 江苏双益给排水有限公司 | A kind of frequency conversion water supply facility |
| CN111733931A (en) * | 2020-06-29 | 2020-10-02 | 安徽海沃特水务股份有限公司 | Secondary water supply water quality monitoring system |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10299684A (en) * | 1997-04-25 | 1998-11-10 | Hitachi Ltd | City water supply equipment having water storage tank |
| CN201128925Y (en) * | 2007-10-01 | 2008-10-08 | 烟台双嘉电子科技有限公司 | Full-automatic non-negative pressure frequency conversion energy storage emergency water supply facility |
| CN203066158U (en) * | 2013-01-23 | 2013-07-17 | 张立 | Mute laminated pressure negative-pressure-free water supply device |
| CN203741938U (en) * | 2013-12-30 | 2014-07-30 | 青岛万力科技有限公司 | Pipe network pressurizing energy-saving water supply device |
| CN204298877U (en) * | 2014-12-04 | 2015-04-29 | 王朝 | A kind of non-negative pressure water-supply installation |
| CN205875258U (en) * | 2016-07-28 | 2017-01-11 | 林丽丽 | Air purification type does not have negative pressure water supply equipment |
| CN207633410U (en) * | 2017-09-08 | 2018-07-20 | 安徽兴安电气设备股份有限公司 | A kind of tap water flow control system |
-
2017
- 2017-09-08 CN CN201710806217.5A patent/CN107700585A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10299684A (en) * | 1997-04-25 | 1998-11-10 | Hitachi Ltd | City water supply equipment having water storage tank |
| CN201128925Y (en) * | 2007-10-01 | 2008-10-08 | 烟台双嘉电子科技有限公司 | Full-automatic non-negative pressure frequency conversion energy storage emergency water supply facility |
| CN203066158U (en) * | 2013-01-23 | 2013-07-17 | 张立 | Mute laminated pressure negative-pressure-free water supply device |
| CN203741938U (en) * | 2013-12-30 | 2014-07-30 | 青岛万力科技有限公司 | Pipe network pressurizing energy-saving water supply device |
| CN204298877U (en) * | 2014-12-04 | 2015-04-29 | 王朝 | A kind of non-negative pressure water-supply installation |
| CN205875258U (en) * | 2016-07-28 | 2017-01-11 | 林丽丽 | Air purification type does not have negative pressure water supply equipment |
| CN207633410U (en) * | 2017-09-08 | 2018-07-20 | 安徽兴安电气设备股份有限公司 | A kind of tap water flow control system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108755848A (en) * | 2018-08-16 | 2018-11-06 | 江苏双益给排水有限公司 | A kind of frequency conversion water supply facility |
| CN111733931A (en) * | 2020-06-29 | 2020-10-02 | 安徽海沃特水务股份有限公司 | Secondary water supply water quality monitoring system |
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Application publication date: 20180216 |
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