CN107700584A - A kind of non-negative pressure frequency-changing water supply device - Google Patents
A kind of non-negative pressure frequency-changing water supply device Download PDFInfo
- Publication number
- CN107700584A CN107700584A CN201710805098.1A CN201710805098A CN107700584A CN 107700584 A CN107700584 A CN 107700584A CN 201710805098 A CN201710805098 A CN 201710805098A CN 107700584 A CN107700584 A CN 107700584A
- Authority
- CN
- China
- Prior art keywords
- water
- connecting tube
- pipe
- current regulator
- water supply
- 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
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 177
- 239000007788 liquid Substances 0.000 claims abstract description 11
- 239000000523 sample Substances 0.000 claims abstract description 8
- 230000006641 stabilisation Effects 0.000 claims description 2
- 238000011105 stabilization Methods 0.000 claims description 2
- 230000033228 biological regulation Effects 0.000 claims 1
- 239000008399 tap water Substances 0.000 description 15
- 235000020679 tap water Nutrition 0.000 description 15
- 208000034699 Vitreous floaters Diseases 0.000 description 5
- 238000001514 detection method Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000007423 decrease Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001629 suppression Effects 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)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
The invention discloses a kind of non-negative pressure frequency-changing water supply device, including water inlet pipe, two control valves are installed on the water inlet pipe, intake pipe is installed on the water inlet pipe between two control valves, the one end of the intake pipe away from water inlet pipe is connected with water tank, the inside of the water tank is provided with three parallel hang plates from top to bottom, the water outlet probe tube with three hang plate position correspondences is equiped with the side wall of the water tank, one end of the water inlet pipe is communicated with stable current regulator, 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 lower end of the stable current regulator is provided with blowoff valve, the lower end of the stable current regulator is additionally provided with the 4th connecting tube.The present invention can constantly be detected during being supplied water to water quality, improve the security of water, have good popularizing action.
Description
Technical field
The present invention relates to non-negative pressure method of water supply field, more particularly to a kind of non-negative pressure frequency-changing water supply device.
Background technology
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, shape
Good energy-conserving effect, it is constant pressure water supply equipment without the secondary pollution of water quality into closed continuous relay supercharging way of supplying water
Development and extension.Water supply is directly laminated on the basis of municipal ductwork pressure, saves the energy, and also there is totally-enclosed, nothing
Pollution, many advantages, such as occupation of land amount is small, quick for installation, reliable, easy to maintenance, and current supply equipment is in the mistake of water supply
Detection in journey to water quality is inadequate, often there was only detection preliminary at the beginning, is not detected during system, so having can
Monitoring that can be to water quality is inadequate, causes unexpectedly to occur.
The content of the invention
The invention aims to solve the problems of the prior art, and a kind of non-negative-pressure variable frequency proposed supplies water and set
It is standby.
To achieve these goals, present invention employs following technical scheme：
A kind of non-negative pressure frequency-changing water supply device, including water inlet pipe, two control valves, two controls are installed on the water inlet pipe
Intake pipe is installed, the one end of the intake pipe away from water inlet pipe is connected with water tank, institute on the water inlet pipe between valve
The inside for stating water tank is provided with three parallel hang plates from top to bottom, is equiped with the side wall of the water tank and three inclinations
Water outlet probe tube corresponding to Board position, one end of the water inlet pipe are communicated with stable current regulator, the upper end of the stable current regulator
Vacuum suppresser and pressure gauge are equiped with respectively, and the inside of the stable current regulator is provided with anhydrous shutdown liquid-level floater, and anhydrous
Shut down liquid-level floater to connect with vacuum suppresser by connecting line, the lower end of the stable current regulator is provided with blowoff valve, described steady
The lower end of throttle regulator is additionally provided with the 4th connecting tube, and the described one end of first connecting tube away from stable current regulator is provided with the second connection
Pipe, three feed pipes are communicated with second connecting tube, be sequentially provided with butterfly valve on two of which feed pipe from bottom to top, soft connect
Head, the second water pump and another butterfly valve, connecting hose and magnetic valve are respectively equipped with from top to bottom on another described feed pipe, it is described
The one end of feed pipe away from the second connecting tube is connected with the 5th connecting tube jointly, and one end of the 5th connecting tube is connected with the 3rd
Connecting tube, the described one end of 3rd connecting tube away from the 5th connecting tube are provided with voltage-stabilizing compensator, the 5th connecting tube it is another
End is connected with outlet pipe by water outlet butterfly valve, equidistant on the outlet pipe to be equiped with some depotition cocks, first water pump,
Second water pump and vacuum suppresser are connected by wire with external variable frequency water supply switch board.
Preferably, it is equipped with check-valves between the butterfly valve and connecting hose, between the second water pump and connecting hose.
Preferably, be equiped with distance-transmission pressure gauge in the 5th connecting tube, and distance-transmission pressure gauge by wire with it is external
Variable frequency water supply switch board connects.
Preferably, be equiped with the first connecting tube in the outlet pipe and the second connecting tube, first connecting tube with
The inside connection of water tank, and the delivery port of the first connecting tube is located at the downside of two hang plates of upside.
Preferably, the first water pump is provided between second connecting tube and the first connecting tube.
Preferably, between the intake pipe and water tank, between the first water pump and the second connecting tube, the 5th connecting tube and
Valve is equipped between three connecting tubes, between first connecting tube and water tank.
Preferably, also it is equiped with valve on the water outlet probe tube.
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 fills
Man Hou, vacuum suppresser are closed automatically.When tap water pipe network pressure disclosure satisfy that with water requirement, system from bypass check valve to
Directly supplied water with grid；When tap water pipe network pressure can not meet to be required with water, system pressure signal is by distance-transmission pressure gauge
Frequency-variable controller, water pump operation are fed back to, and rotating speed constant pressure water supply is automatically adjusted according to the size of water consumption, if operating water pump reaches
During to 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, and pass through in water inlet pipe, the second connecting tube and the 5th connecting tube
First connecting tube connects with water tank, carries out the detection of water quality to the water of different processes, adds the security of water quality, the present invention
Water quality can constantly be detected during being supplied water, improve the security of water, had to promote well and make
With.
Brief description of the drawings
Fig. 1 is a kind of structural representation of non-negative pressure frequency-changing water supply device proposed by the present invention.
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.
In the description of the invention, it is to be understood that term " on ", " under ", "front", "rear", "left", "right",
The orientation or position relationship of the instruction such as " top ", " bottom ", " interior ", " outer " are based on orientation shown in the drawings or position relationship, are only
Described for the ease of description is of the invention with simplified, rather than the device or element of instruction or hint meaning must be with specifically sides
Position, with specific azimuth configuration and operation, therefore be not considered as limiting the invention.
Reference picture 1, a kind of non-negative pressure frequency-changing water supply device, including water inlet pipe 1, two control valves are installed on water inlet pipe 1
, intake pipe 2 is installed on the water inlet pipe 1 between two control valves, the one end of intake pipe 2 away from water inlet pipe 1, which is connected with, to be taken
Water tank 4, the inside of water tank 4 are provided with three parallel hang plates, are equiped with and three in the side wall of water tank 4 from top to bottom
The water outlet probe tube 3 of hang plate position correspondence, one end of water inlet pipe 1 are communicated with stable current regulator 5, the upper end of stable current regulator 5
Vacuum suppresser 7 and pressure gauge are equiped with respectively, and the inside of stable current regulator 5 is provided with anhydrous shutdown liquid-level floater 8, and anhydrous
Shut down liquid-level floater 8 to connect by connecting line and vacuum suppresser 7, the lower end of stable current regulator 5 is provided with blowoff valve 6, current stabilization
The lower end of adjuster 5 is additionally provided with the 4th connecting tube, and the one end of the first connecting tube away from stable current regulator 5 is provided with the second connecting tube
12, three feed pipes 11 are communicated with the second connecting tube 12, and butterfly valve is sequentially provided with from bottom to top on two of which feed pipe 11
16th, connecting hose 13, the second water pump 14 and another butterfly valve 16, connecting hose is respectively equipped with from top to bottom on another feed pipe 11
13 and magnetic valve 19, the one end of feed pipe 11 away from the second connecting tube 12 be connected with the 5th connecting tube jointly, the 5th connecting tube
One end is 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 voltage-stabilizing compensator 18, and the 5th
The other end of connecting tube is connected with outlet pipe 22 by water outlet butterfly valve 21, on outlet pipe 22 it is equidistant be equiped with it is some go out the fire hose
First 23, the first water pump 9, the second water pump 14 and vacuum suppresser 7 are connected by wire and external variable frequency water supply switch board 24
Connect, be equipped with check-valves 15 between butterfly valve 16 and connecting hose 13, between the second water pump and connecting hose 13, filled in the 5th connecting tube
Provided with distance-transmission pressure gauge 20, and distance-transmission pressure gauge 20 is connected by wire with external variable frequency water supply switch board 24, outlet pipe
22 and second are equiped with the first connecting tube 10 in connecting tube 12, and inside of first connecting tube 10 with water tank 4 connects, and
The delivery port of first connecting tube 10 is located at the downside of two hang plates of upside, the second connecting tube 12 and the first connecting tube 10 it
Between be provided with the first water pump 9, between intake pipe 2 and water tank 4, between the first water pump 9 and the second connecting tube 12, the 5th connecting tube
And the 3rd between connecting tube 17, is equipped with valve between the first connecting tube 10 and water tank 10, is also installed on water outlet probe tube 3
There is 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 small pump discharge amount, stable current regulator 5
Interior water as make-up water source still can normal water supply, now, air enters stable current regulator 5 by vacuum suppresser 7, true in tank
Sky is 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, stable current regulator liquid level is caused constantly to decline, signal is fed back to frequency-variable controller by level sensor,
Water 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 can be stored and released energy, and avoid water pump frequent starting, and in water inlet pipe 1, the second connecting tube 12 and the 5th connection
Guan Shangjun is connected by the first connecting tube 10 with water tank, is carried out the detection of water quality to the water of different processes, is added water quality
Security.
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 (7)
1. a kind of non-negative pressure frequency-changing water supply device, including water inlet pipe（1）, it is characterised in that the water inlet pipe（1）On be provided with two
Individual control valve, the water inlet pipe between two control valves（1）On intake pipe is installed（2）, the intake pipe（2）It is remote
Water inlet pipe（1）One end be connected with water tank（4）, the water tank（4）Inside be provided with three parallel inclinations from top to bottom
Plate, the water tank（4）Side wall on be equiped with water outlet probe tube with three hang plate position correspondences（3）, the water inlet pipe
（1）One end be communicated with stable current regulator（5）, the stable current regulator（5）Upper end be equiped with vacuum suppresser respectively（7）With
Pressure gauge, the stable current regulator（5）Inside be provided with anhydrous shutdown liquid-level floater（8）, and anhydrous shutdown liquid-level floater（8）It is logical
Cross connecting line and vacuum suppresser（7）Connection, the stable current regulator（5）Lower end be provided with blowoff valve（6）, the current stabilization regulation
Device（5）Lower end be additionally provided with the 4th connecting tube, first connecting tube is away from stable current regulator（5）One end be provided with second connection
Pipe（12）, second connecting tube（12）On be communicated with three feed pipes（11）, two of which feed pipe（11）On from bottom to top
It is sequentially provided with butterfly valve（16）, connecting hose（13）, the second 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 is connected with the 5th connecting tube jointly, and one end of the 5th connecting tube is connected with the 3rd connecting tube（17）, the 3rd connection
Pipe（17）One end away from the 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）It is connected with outlet pipe（22）, the outlet pipe（22）It is above equidistant to be equiped with some depotition cocks（23）, described first
Water pump（9）, the second water pump（14）And vacuum suppresser（7）Pass through wire and external variable frequency water supply switch board（24）Connection.
A kind of 2. non-negative pressure frequency-changing water supply device according to claim 1, it is characterised in that the butterfly valve（16）Connect with soft
Head（13）Between, the second water pump and connecting hose（13）Between be equipped with check-valves（15）.
3. a kind of non-negative pressure frequency-changing water supply device according to claim 1, it is characterised in that filled in the 5th connecting tube
Provided with distance-transmission pressure gauge（20）, and distance-transmission pressure gauge（20）Pass through wire and external variable frequency water supply switch board（24）Connection.
A kind of 4. non-negative pressure frequency-changing water supply device according to claim 1, it is characterised in that the outlet pipe（22）With
Two connecting tubes（12）On be equiped with the first connecting tube（10）, first connecting tube（10）And water tank（4）Inside connect
It is logical, and the first connecting tube（10）Delivery port be located at upside two hang plates downside.
A kind of 5. non-negative pressure frequency-changing water supply device according to claim 1, it is characterised in that second connecting tube（12）
With the first connecting tube（10）Between be provided with the first water pump（9）.
A kind of 6. non-negative pressure frequency-changing water supply device according to claim 1, it is characterised in that the intake pipe（2）With taking
Water tank（4）Between, the first water pump（9）With the second connecting tube（12）Between, the 5th connecting tube and the 3rd connecting tube（17）Between, institute
State the first connecting tube（10）And water tank（10）Between be equipped with valve.
A kind of 7. non-negative pressure frequency-changing water supply device according to claim 6, it is characterised in that the water outlet probe tube（3）
On be also equiped with valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710805098.1A CN107700584A (en) | 2017-09-08 | 2017-09-08 | A kind of non-negative pressure frequency-changing water supply device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710805098.1A CN107700584A (en) | 2017-09-08 | 2017-09-08 | A kind of non-negative pressure frequency-changing water supply device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107700584A true CN107700584A (en) | 2018-02-16 |
Family
ID=61172256
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710805098.1A Pending CN107700584A (en) | 2017-09-08 | 2017-09-08 | A kind of non-negative pressure frequency-changing water supply device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107700584A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110670668A (en) * | 2019-10-10 | 2020-01-10 | 王依曼 | Non-negative pressure water supply equipment |
| 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 |
| CN112962721A (en) * | 2021-02-04 | 2021-06-15 | 崔忠朝 | Intelligent water-saving water supply equipment |
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| CN201321631Y (en) * | 2008-12-25 | 2009-10-07 | 郑州水业科技发展有限公司 | Secondary water supply safe intelligent management system |
| JP2012237156A (en) * | 2011-05-12 | 2012-12-06 | Sumiju Kankyo Engineering Kk | Water quality control device, water quality management system, water quality management device and water quality management method |
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| CN205875258U (en) * | 2016-07-28 | 2017-01-11 | 林丽丽 | Air purification type does not have negative pressure water supply equipment |
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| CN207582564U (en) * | 2017-09-08 | 2018-07-06 | 安徽兴安电气设备股份有限公司 | A kind of non-negative pressure frequency-changing water supply device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201321631Y (en) * | 2008-12-25 | 2009-10-07 | 郑州水业科技发展有限公司 | Secondary water supply safe intelligent management system |
| JP2012237156A (en) * | 2011-05-12 | 2012-12-06 | Sumiju Kankyo Engineering Kk | Water quality control device, water quality management system, water quality management device and water quality management method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110670668A (en) * | 2019-10-10 | 2020-01-10 | 王依曼 | Non-negative pressure water supply equipment |
| CN110670668B (en) * | 2019-10-10 | 2020-10-16 | 上海海德隆流体设备制造有限公司 | Non-negative pressure water supply equipment |
| 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 |
| CN112962721A (en) * | 2021-02-04 | 2021-06-15 | 崔忠朝 | Intelligent water-saving water supply equipment |
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Application publication date: 20180216 |
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