CN106049596A - Water supply method and system - Google Patents
Water supply method and system Download PDFInfo
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- CN106049596A CN106049596A CN201610451389.0A CN201610451389A CN106049596A CN 106049596 A CN106049596 A CN 106049596A CN 201610451389 A CN201610451389 A CN 201610451389A CN 106049596 A CN106049596 A CN 106049596A
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- Prior art keywords
- signal
- valve
- water
- unlatching
- preset
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Classifications
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- 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
Abstract
The invention provides a water supply method and a water supply system. The method comprises the following steps: opening a first valve in accordance with a received first opening signal, and leading cooling water of a water pump to the water pump; when the flow rate of the cooling water reaches a preset flow rate, receiving a second opening signal, and opening a second valve to a preset first angle range in accordance with the second opening signal; receiving a third opening signal, and turning on the water pump within a first preset time range in accordance with the third opening signal; receiving a fourth opening signal, and opening the second valve to a second preset angle in accordance with the fourth opening signal; and when a water supply pipeline reaches a preset pressure range, receiving a first closing signal, and closing the first valve in accordance with a first closing signal. Therefore, the water supply method and the water supply system, in water supply and drainage works, can achieve remote automatic control over opening and closing of the water pump, so that the labor intensity and error operation risks of operators are reduced and water supply efficiency is improved.
Description
Technical field
The invention belongs to the technical field of feedwater draining, particularly relate to a kind of method of supplying water and system.
Background technology
In water supply and drainage field, water engineering is to supply the fire-fighting of life industrial water for resident and factories and miness transport enterprise to use
Water, roadside greening water etc., be made up of water supply source, intake strucure, raw water pipeline, water treatment plant and water supply network, tool
Have to take collection and carry former water and improve the effect of water quality.The various waste water in human lives's sewage and production are got rid of in drainage system.
In Water and Waste Water Engineering, it is common that use vertical-type axial-flow pump to carry out water supply and drainage.The operation of vertical-type axial-flow pump is special
Point is that lift is the highest, and pump power is the biggest, and corresponding motor electric current is the highest；Therefore in order to avoid vertical axial-flow pump motor to occur, stream is existing
As, vertical-type axial-flow pump is prohibited from valve closing and opens pump.If outlet valve aperture is excessive when vertical-type axial-flow pump is opened, it will occur being situated between
Matter flows backwards and causes vertical-type axial-flow pump reversal development, causes impeller, pump shaft to damage.In prior art, generally by manually opposition
Formula axial-flow pump is turned on and off, it usually needs 2-3 name operator operate simultaneously, and the operating time is longer, leads
The efficiency causing feedwater or draining reduces.
Based on this, the present invention provides a kind of water system and method, can open and close by automatic vertical axial-flow pump
Close, reduce the labor intensity of operator, improve water supply and drainage efficiency.
Summary of the invention
The problem existed for prior art, embodiments provides a kind of water system and method, is used for solving
Prior art can not open and close automatically by vertical axial-flow pump, cause the technical problem that water supply and drainage efficiency reduces.
The present invention provides a kind of method of supplying water, and described method includes:
The first unlatching signal according to receiving controls the first valve opening, and cooling water is flowed into water pump；
When described cooling water flow reaches default flow, receive the second unlatching signal, open letter according to described second
In the range of the default very first time, number control the second valve opening to the first angular range preset；
Receive the 3rd unlatching signal, open signal according to the described 3rd and open described water pump；
Receive the 4th unlatching signal, open signal according to the described 4th and control described second valve opening to second preset
Angle；
When water supply line reaches default pressure limit, receive the first shutdown signal, according to described first shutdown signal
Control described first valve closing.
In such scheme, described method also includes:
The second shutdown signal according to receiving controls described first valve opening；
When after described first valve opening, receive the 3rd shutdown signal, control described the according to described 3rd shutdown signal
Two valve closings are to the first angular range preset；
Receive the 4th shutdown signal, close described water pump according to described 4th shutdown signal；
Receive the 5th shutdown signal, according to described 5th shutdown signal by described second valve closing to the third angle preset
Degree；
Receive the 6th shutdown signal, close described first valve according to described 6th shutdown signal.
In such scheme, described first valve is specially electromagnetic valve.
In such scheme, described second valve is specially hydraulic butterfly valve.
In such scheme, described default flow is specially 2m3/h。
In such scheme, described first angular range specifically includes: 10 °～20 °.
In such scheme, described default very first time scope is particularly as follows: 5～10s.
In such scheme, described second angle be specially described second valve fully open time corresponding angle.
In such scheme, described default pressure limit specifically includes: 0.1～0.2MPa.
The present invention also provides for a kind of water system, and described system includes:
First controller, for receiving the first unlatching signal and the first shutdown signal, according to the first unlatching letter received
Number control the first valve opening, will cooling water flow into water pump；Or control described first valve pass according to described first shutdown signal
Close；
Second controller, for receiving the second unlatching signal, opens signal according to described second and controls the second valve opening
To the first angular range preset；
For receiving the 4th unlatching signal, open signal according to the described 4th and control what described second valve opening was extremely preset
Second angle；
3rd controller, for receiving the 3rd unlatching signal, opens signal in the default very first time according to the described 3rd
In the range of open described water pump.
The invention provides a kind of water system and method, described method includes: according to the first unlatching signal received
Control the first valve opening, cooling water is flowed into water pump；When described cooling water flow reaches default flow, receive second and open
Open signal, open signal according to described second and control the second valve opening to the first angular range preset；Receive the 3rd unlatching
Signal, opens signal according to the described 3rd and opens described water pump in the range of the default very first time；Receive the 4th unlatching signal,
Open signal according to the described 4th and control described second valve opening to the second angle preset；When water supply line reaches default
During pressure limit, receive the first shutdown signal, control described first valve closing according to described first shutdown signal.So, exist
In Water and Waste Water Engineering, water pump can be controlled with remote auto and open, reduce labor intensity and the maloperation risk of operator, improve
Efficiency of feed water.
Accompanying drawing explanation
The method of supplying water schematic flow sheet that Fig. 1 provides for the embodiment of the present invention one；
The water system structural representation that Fig. 2 provides for the embodiment of the present invention two.
Detailed description of the invention
The invention provides a kind of method of supplying water and water system, described method includes: according to the first unlatching received
Signal controls the first valve opening, and cooling water is flowed into water pump；When described cooling water flow reaches default flow, receive the
Two open signal, open signal according to described second and control the second valve opening to the first angular range preset；Receive the 3rd
Open signal, open signal according to the described 3rd in the range of the default very first time, open described water pump；Receive the 4th unlatching
Signal, opens signal according to the described 4th and controls described second valve opening to the second angle preset；When water supply line reaches
During the pressure limit preset, receive the first shutdown signal, control described first valve closing according to described first shutdown signal.
Below by drawings and the specific embodiments, technical scheme is described in further detail.
Embodiment one
The present embodiment provides a kind of method of supplying water, as it is shown in figure 1, said method comprising the steps of:
Step 110, the first unlatching signal according to receiving controls the first valve opening, cooling water is flowed into water pump.
In this step, when needs carry out water supply and drainage, first receiving the first unlatching signal, first according to receiving opens
Open signal and control the first valve opening, water pump personal cooling water is flowed into water pump, the bearing of water pump is cooled down and lubricates.Its
In, described first valve is specially electromagnetic valve, and described water pump is vertical shaft water pump.
Step 111, receives the second unlatching signal, opens signal according to described second and controls what the second valve opening was extremely preset
First angular range.
In this step, when determining that described cooling water flow reaches default flow, receive the second unlatching signal, according to institute
State the second unlatching signal and in the range of the default very first time, control the second valve opening to the first angular range preset.Its
In, described default flow can be 1～3m3/h；Preferably, for 1.5m3/ h, 2m3/h.Described second valve is specially hydraulic control
Butterfly valve, described first angular range is specifically as follows 10 °～20 °；Preferably, it is 15 °.Described very first time scope can be wrapped
Include: 5～10s；Preferably, for 6s, 7s or 8s.Here.In order to prevent vertical-type axial-flow pump from refluence phenomenon occurring, so during by first
Between scope be set to 5～10s.
It addition, when determining that described cooling water flow exceedes described default flow, then start flow alarm function function, prompting
Staff's cooling water flow is excessive；When determining described cooling water flow less than described default flow, then start flow report
Alert function, prompting staff's cooling water flow is too small, to guarantee vertical type water flow pump energy safe operation.
Step 112, receives the 3rd unlatching signal, opens signal according to the described 3rd and opens described water pump.
In this step, after determining the first angular range that described second valve opening is extremely preset, receive the 3rd unlatching letter
Number, open signal according to the described 3rd and open described vertical fluid sucking pump.
Step 113, receives the 4th unlatching signal, opens signal according to the described 4th and controls described second valve opening in advance
If the second angle.
In this step, after determining that described vertical fluid sucking pump is opened, receive the 4th unlatching signal, according to described the
Four open signal controls described second valve opening to the second angle preset.Wherein, described second angle is 90 °, i.e. described
The angle that second valve is corresponding time fully open.
Here, when described second valve is fully open, described method also includes: receive the 5th unlatching signal, according to institute
State the 5th unlatching signal and control the 3rd valve opening, prevent the water of outlet conduit to be back in described vertical-type axial-flow pump.Wherein, institute
State the 3rd valve and may include that check-valves.
Step 114, when water supply line reaches default pressure limit, receives the first shutdown signal, according to described first
Shutdown signal controls described first valve closing.
In this step, when determine reach default pressure limit when water supply line time, receive the first shutdown signal, according to institute
Stating the first shutdown signal and control described first valve closing, water supply and drainage process terminates.Wherein, described default pressure limit can
To include: 0.1～0.2MPa；Preferably, for 0.15MPa, 0.17MPa or 0.18MPa.
Further, after water supply and drainage process terminates, when needing to close described vertical fluid sucking pump, receive the second pass
Closing signal, the second shutdown signal according to receiving controls described first valve opening；When determining described first valve opening,
Receive the 3rd shutdown signal, control described second valve closing to the first angle model preset according to described 3rd shutdown signal
Enclose；When determining described second valve closing to the first angular range preset, receive the 4th shutdown signal, according to the described 4th
Shutdown signal closes described vertical fluid sucking pump；After determining that described vertical fluid sucking pump is closed, receive the 5th shutdown signal,
Described second valve closing is closed to the third angle preset according to described 5th shutdown signal in the range of the very first time preset；
When determining described valve closing to the third angle preset, receive the 6th shutdown signal, close according to described 6th shutdown signal
Close described first valve.Wherein, described default third angle is zero degree, angle when the most described second valve completely closes.
The method of supplying water that the present embodiment provides, in Water and Waste Water Engineering, can control vertical fluid sucking pump with remote auto
Unlatching, reduce the labor intensity of operator and maloperation risk, improve water supply and drainage efficiency, be particularly well-suited to unmanned pump
Stand；And it is possible to by the first angular range preset and the aperture of second Angle ambiguity the second valve, it is ensured that medium will not go out
Now flowing backwards, vertical fluid sucking pump does not haves the phenomenon of impeller reversion, and then can improve the service life of vertical fluid sucking pump；
It addition, cooling water can be utilized to be lubricated when vertical fluid sucking pump is properly functioning, reduce further cost.
Embodiment two
Corresponding to embodiment one, present embodiments provide a kind of water system, as in figure 2 it is shown, described system includes: first
Controller the 1, first valve 2, effusion meter 3, second controller the 4, second valve the 5, the 3rd controller 6, water pump the 7, the 4th controller
8, the 3rd valve 9 and Pressure gauge 10；Wherein,
When needs carry out water supply and drainage, first, described first controller 1 receives the first unlatching signal, and according to reception
To the first unlatching signal control the first valve 2 and open, water pump personal cooling water flows into water pump 7, carries out cold to the bearing of water pump 7
But and lubrication.Wherein, described first valve 2 is specially electromagnetic valve, and described water pump 7 is vertical shaft water pump.
Secondly, when according to effusion meter 3, described system determines that cooling water flow has reached default flow, described second
Controller 4 is for receiving the second unlatching signal, and controls in the range of the default very first time according to described second unlatching signal
Second valve 5 is opened into the first default angular range.Wherein, described default flow can be 1～3m3/h；Preferably, for
1.5m3/ h, 2m3/h.Described second valve 5 is specially hydraulic butterfly valve, and described first angular range is specifically as follows 10 °～20 °；
Preferably, it is 15 °.Described very first time scope may include that 5～10s；Preferably, for 6s, 7s or 8s.Here.In order to prevent
There is refluence phenomenon in vertical-type axial-flow pump, so very first time scope is set to 5～10s.Wherein,
It addition, when the described cooling water flow that effusion meter 3 collects exceedes described default flow, described system then opens
Dynamic flow alarm function function, prompting staff's cooling water flow is excessive；The described cooling water flow collected when effusion meter 3 is less than
During described default flow, then starting flow alarm function function, prompting staff's cooling water flow is too small, to guarantee vertical type water flow
Pump energy safe operation.
Then, after system determines that described second valve 5 is opened into the first default angular range, described 3rd controller
6, for receiving the 3rd unlatching signal, open signal according to the described 3rd and open described vertical fluid sucking pump.
After described vertical fluid sucking pump is opened, described second controller 4 is additionally operable to receive the 4th unlatching signal, according to institute
State the 4th unlatching signal described second valve 5 of control and be opened into the second default angle.Wherein, described second angle is 90 °, i.e.
The angle that described second valve 5 is corresponding time fully open.
Here, described system also includes: the 4th controller 8 and the 3rd valve 9；When described second valve 5 is fully open,
Described 4th controller 8 is additionally operable to receive the 5th unlatching signal, opens signal control the 3rd valve 9 according to the described 5th and opens,
The water preventing outlet conduit is back in described vertical-type axial-flow pump.Wherein, described 3rd valve 9 may include that check-valves.
Finally, the pressure of the water supply network that Pressure gauge 10 collects is utilized to determine that water supply line reaches default pressure when system
During power scope, described first controller 1 is additionally operable to receive the first shutdown signal, controls described the according to described first shutdown signal
One valve 2 is closed, and water supply and drainage process terminates.Wherein, described default pressure limit may include that 0.1～0.2MPa；Preferably
Ground, for 0.15MPa, 0.17MPa or 0.18MPa.
Further, after water supply and drainage process terminates, when needing to close described vertical fluid sucking pump, described first control
Device 1 processed is additionally operable to receive the second shutdown signal, controls described first valve 2 according to the second shutdown signal received and opens.
When system determines that described first valve 2 is opened, described second controller 4 is additionally operable to receive the 3rd shutdown signal,
Control described second valve 5 according to described 3rd shutdown signal to close to the first angular range preset.
When system determines that described second valve 5 is closed to the first angular range preset, described 3rd controller 6 is also used
In receiving the 4th shutdown signal, close described vertical fluid sucking pump according to described 4th shutdown signal.
After system determines that described vertical fluid sucking pump is closed, described second controller 4 is additionally operable to described reception the 5th pass
Close signal, according to described 5th shutdown signal, described second valve 5 is closed to default in the range of the default very first time
Third angle.
When system determines that described second valve 5 is closed to the third angle preset, described first controller 1 is additionally operable to connect
Receive the 6th shutdown signal, close described first valve 2 according to described 6th shutdown signal.Wherein, described default third angle
For zero degree, angle when the most described second valve 5 completely closes.
In the present embodiment, described first controller 1, second controller 4 and the 3rd controller 6 can be water system
Same control unit, it is also possible to for different control units；When reality is applied, described first controller 1, second controller 4
And the 3rd controller 6 can be by the central processing unit (CPU, Central Processing Unit) in this system, digital signal
Processor (DSP, Digtal Signal Processor), programmable logic array (FPGA, Field Programmable
Gate Array), micro-control unit (MCU, Micro Controller Unit), programmable logic controller (PLC) (PLC,
Programmable logic Controller) realize.
The water system that the present embodiment provides, in Water and Waste Water Engineering, can control vertical fluid sucking pump with remote auto
Open, reduce labor intensity and the maloperation risk of operator, improve water supply and drainage efficiency, be particularly well-suited to unmanned pump
Stand；And it is possible to by the first angular range preset and the aperture of second Angle ambiguity the second valve, it is ensured that medium will not go out
Now flowing backwards, vertical fluid sucking pump does not haves the phenomenon of impeller reversion, and then can improve the service life of vertical fluid sucking pump；
It addition, cooling water can be utilized to be lubricated when vertical fluid sucking pump is properly functioning, reduce further cost.
The above, only presently preferred embodiments of the present invention, be not intended to limit protection scope of the present invention, all
Any amendment, equivalent and the improvement etc. made within the spirit and principles in the present invention, should be included in the protection of the present invention
Within the scope of.
Claims (10)
1. a method of supplying water, it is characterised in that described method includes:
The first unlatching signal according to receiving controls the first valve opening, and cooling water is flowed into water pump；
When described cooling water flow reaches default flow, receive the second unlatching signal, open signal according to described second and exist
The second valve opening is controlled to the first angular range preset in the range of the very first time preset；
Receive the 3rd unlatching signal, open signal according to the described 3rd and open described water pump；
Receive the 4th unlatching signal, open signal according to the described 4th and control described second valve opening to second jiao preset
Degree；
When water supply line reaches default pressure limit, receive the first shutdown signal, control according to described first shutdown signal
Described first valve closing.
2. the method for claim 1, it is characterised in that described method also includes:
The second shutdown signal according to receiving controls described first valve opening；
When, after described first valve opening, receiving the 3rd shutdown signal, control described second valve according to described 3rd shutdown signal
Door is closed to the first angular range preset；
Receive the 4th shutdown signal, close described water pump according to described 4th shutdown signal；
Receive the 5th shutdown signal, according to described 5th shutdown signal by described second valve closing to the third angle preset；
Receive the 6th shutdown signal, close described first valve according to described 6th shutdown signal.
3. method as claimed in claim 1 or 2, it is characterised in that described first valve is specially electromagnetic valve.
4. method as claimed in claim 1 or 2, it is characterised in that described second valve is specially hydraulic butterfly valve.
5. the method for claim 1, it is characterised in that described default flow is specially 2m3/h。
6. the method for claim 1, it is characterised in that described first angular range specifically includes: 10 °～20 °.
7. the method for claim 1, it is characterised in that described default very first time scope is particularly as follows: 5～10s.
8. the method for claim 1, it is characterised in that it is fully open that described second angle is specially described second valve
Time corresponding angle.
9. the method for claim 1, it is characterised in that described default pressure limit specifically includes: 0.1～
0.2MPa。
10. a water system, it is characterised in that described system includes:
First controller, for receiving the first unlatching signal and the first shutdown signal, according to the first unlatching signal control received
Make the first valve opening, cooling water is flowed into water pump；Or control described first valve closing according to described first shutdown signal；
Second controller, for receiving the second unlatching signal, opens signal according to described second and controls the second valve opening in advance
If the first angular range；
For receiving the 4th unlatching signal, open signal according to the described 4th and control described second valve opening to second preset
Angle；
3rd controller, for receiving the 3rd unlatching signal, opens signal in default very first time scope according to the described 3rd
The described water pump of interior unlatching.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610451389.0A CN106049596A (en) | 2016-06-21 | 2016-06-21 | Water supply method and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610451389.0A CN106049596A (en) | 2016-06-21 | 2016-06-21 | Water supply method and system |
Publications (1)
| Publication Number | Publication Date |
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| CN106049596A true CN106049596A (en) | 2016-10-26 |
Family
ID=57167790
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610451389.0A Pending CN106049596A (en) | 2016-06-21 | 2016-06-21 | Water supply method and system |
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| CN (1) | CN106049596A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110238358A (en) * | 2019-05-23 | 2019-09-17 | 首钢京唐钢铁联合有限责任公司 | Continuous casting crystallining water system control method, device and electronic equipment |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20090034181A (en) * | 2007-10-02 | 2009-04-07 | (주) 두두에너텍 | Boundary area flowing control device having the function obliterating remaining water for tap water pipeline supply system |
| CN102852825A (en) * | 2011-07-01 | 2013-01-02 | 高邮环流泵业有限公司 | Two-way water outlet axial flow pump |
| CN204739008U (en) * | 2014-12-15 | 2015-11-04 | 樊建苗 | Double -deck two -way runner system of vertical dive axial -flow pump |
| CN205298012U (en) * | 2016-01-07 | 2016-06-08 | 扬州大学 | Novel two -way pump station cutout device |
-
2016
- 2016-06-21 CN CN201610451389.0A patent/CN106049596A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20090034181A (en) * | 2007-10-02 | 2009-04-07 | (주) 두두에너텍 | Boundary area flowing control device having the function obliterating remaining water for tap water pipeline supply system |
| CN102852825A (en) * | 2011-07-01 | 2013-01-02 | 高邮环流泵业有限公司 | Two-way water outlet axial flow pump |
| CN204739008U (en) * | 2014-12-15 | 2015-11-04 | 樊建苗 | Double -deck two -way runner system of vertical dive axial -flow pump |
| CN205298012U (en) * | 2016-01-07 | 2016-06-08 | 扬州大学 | Novel two -way pump station cutout device |
Non-Patent Citations (3)
| Title |
|---|
| 泵装置手册编辑委员会: "《泵装置手册》", 30 April 1992 * |
| 钟淳昌等: "《简明给水设计手册》", 31 December 1989 * |
| 黄志坚等: "《工业泵节能实用技术》", 31 July 2013 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110238358A (en) * | 2019-05-23 | 2019-09-17 | 首钢京唐钢铁联合有限责任公司 | Continuous casting crystallining water system control method, device and electronic equipment |
| CN110238358B (en) * | 2019-05-23 | 2021-04-23 | 首钢京唐钢铁联合有限责任公司 | Control method and device for continuous casting crystal water system and electronic equipment |
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Application publication date: 20161026 |