CN205822349U - A kind of water tower-constant voltage duplex water system - Google Patents
A kind of water tower-constant voltage duplex water system Download PDFInfo
- Publication number
- CN205822349U CN205822349U CN201620507630.2U CN201620507630U CN205822349U CN 205822349 U CN205822349 U CN 205822349U CN 201620507630 U CN201620507630 U CN 201620507630U CN 205822349 U CN205822349 U CN 205822349U
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- water
- pump
- tower
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
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- Control Of Positive-Displacement Pumps (AREA)
Abstract
This utility model relates to a kind of water tower constant voltage duplex water system, including water tower, feed pump, stand-by pump, electrically-controlled valve and control system, the water inlet of feed pump and stand-by pump connects pond, the outlet of feed pump and stand-by pump is divided into two-way, one tunnel connects the water inlet of water tower, one tunnel is directly connected to municipal water supply end, the outlet of water tower connects municipal water supply end, respectively at two between water pump and water tower, electrically-controlled valve is installed on the water pipe between two water pumps and municipal water supply end and between water tower and municipal water supply end, described electrically-controlled valve is by control system control, automatic recirculating bypass valve and pressure transducer are installed on the water pipe between two water pumps and municipal water supply end, pressure transducer is by control system control, automatic recirculating bypass valve is connected with pond.Native system is compared with pure water tower water system, stable, reliable, had both reduced the ductwork pressure fluctuation caused with changes in flow rate, and had also reduced the stop frequency of water pump simultaneously, extend service life.
Description
Technical field
This utility model belongs to municipal water supply field, relates to the control supplied water, especially a kind of water tower-constant voltage duplex water system.
Background technology
Water system currently mainly mainly has two kinds, and one is frequency-conversion water supply system, and one is water tower water-feeding system.
The more country of high building includes, in the urban water supply system of China, typically using frequency-conversion water supply system, by being arranged on pipeline
On pressure transducer control the frequency of converter, thus change motor speed, reach to control flow and the purpose of feed pressure.
This way of supplying water has the complete sets of products of maturation, i.e. one group multiple stage integrated variable frequency parallel connection of pumps to run.When downstream water consumption increases,
Pressure transducer detects that pressure reduces, then increase frequency by converter so that the rotating speed of First pump improves, flow increases,
Pressure increases.When converter output frequency reaches power frequency, second automatically engages and runs with variable mode, and First
Converter auto by pass, uses power frequency operation, until the 3rd, the 4th ....Otherwise, water consumption reduce time, variable frequency pump by
Platform is out of service, until First pump runs with variable mode, if water consumption reduces further, then reduces supply frequency, from
And reduce the pressure of pipe network.
External many countries especially developing country's many employings water tower water-feeding system, according to the common centrifugal water of the water lev el control of water tower
The operation of pump, thus keep the certain water level of water tower, rely on gravity hydraulic pressure to carry out urban pipe network water supply.Advantage is: 1) hydraulic pressure
Highly stable, 2) outside when having a power failure, rely on the water yield of water tower can guarantee that and persistently supply water, and outside often power failure is developed for other
Chinese Home is difficult to avoid that.In large-scale water system, for ensureing reliability of water supply, through frequently with two groups of water pumps toward on water tower
Supply water.Using a pump to supply water according to the water level of water tower when output is less, when output is relatively big, a water pump cannot be expired
Foot water tower needed for lasting water-holding quantity time, then two water pumps run simultaneously, thus ensure the lasting water-holding quantity of water tower.Each for ensureing
Platform pump operation time substantially uniform, then its control process need to comprise Boolean calculation, compare, state memorization etc. some compare
Complicated link.
Problem is current water tower water-feeding system, when water tower overhauls, often through the switching of valve, water pump directly supplies
To pipe network.Owing to the water pump of this kind of water tower water-feeding system is not variable frequency pump, also cannot use according to downstream when transferring water pump direct-furnish to
The change of the water yield is automatically adjusted rotating speed and flow, thus causes series of problems, especially in the time period that downstream water demand amount is the least,
It is particularly acute.
In water supply system, if downstream water demand amount is reduced to a certain degree, will result in following consequence:
1) belong to from cooling pump due to centrifugal pump, i.e. utilize the fluid by water pump to cool down the pump housing, and water consumption is too small will cause
Water pump heating damages.
2) water consumption is too small, causes the downstream pressure of water pump to raise.If pressure reduction is excessive before and after pump, then in the pump housing, produce cavitation
And flass, the damage of acceleration equipment.
Utility model content
In place of the purpose of this utility model is to overcome the deficiencies in the prior art, it is provided that a kind of stable, reliable water tower-constant voltage duplex
Water system.
This utility model solves technical problem and be the technical scheme is that
A kind of water tower-constant voltage duplex water system, including water tower, feed pump, stand-by pump, electrically-controlled valve and control system, feed pump
And the water inlet of stand-by pump connects pond, the outlet of feed pump and stand-by pump is divided into two-way, and a road connects the water inlet of water tower,
One tunnel is directly connected to municipal water supply end, and the outlet of water tower connects municipal water supply end, respectively at two between water pump and water tower, two
Installing electrically-controlled valve on water pipe between individual water pump and municipal water supply end and between water tower and municipal water supply end, described electrically-controlled valve is by controlling
System controls, and the water pipe between two water pumps and municipal water supply end is installed automatic recirculating bypass valve and pressure transducer, pressure
Force transducer is connected with pond by control system control, automatic recirculating bypass valve.
And, described control system includes water tower pattern-manual mode-constant voltage mode three station permutator.
And, it is P.S that stand-by pump opens pump pressure, and stand-by pump termination of pumping pressure is P.H, and it is P.B that automatic recirculating bypass valve starts pressure,
Described P.B > P.H > P.S.
Advantage of the present utility model and good effect be:
1, native system is compared with pure water tower water system, stable, reliable, has both reduced the ductwork pressure caused with changes in flow rate
Fluctuation, also reduces the stop frequency of water pump simultaneously, extends service life.
2, native system is under low discharge situation, automatic recirculating bypass valve according to the pressure signal of its internal sampling, by spring,
The mechanical mechanisms such as lever are automatically adjusted the open circuit size of bypass valve, the most purely mechanic automatization, more demonstrate that this system stability is reliable
Advantage, and by the control of minimum discharge, protection water pump is unlikely to damage at the lower flow conditions effectively.
3, native system is by electric-automation control system that " pressure transducer and PLC " is core+with " by automatic recirculating
Road valve " it is that the mechanical automation system of core carries out effectively integrating and the system integration, thus constitute a brand-new electromechanical
" water tower-constant voltage duplex water system " changed.This water system is when water tower maintenance disables, it is possible to ensure that water system safely may be used
By running.
Accompanying drawing explanation
Fig. 1 is the connection figure of native system.
Detailed description of the invention
The utility model is described in further detail below in conjunction with the accompanying drawings and by specific embodiment, and following example are illustrative,
It not determinate, it is impossible to limit protection domain of the present utility model with this.
A kind of water tower-constant voltage duplex water system, including water tower 1, feed pump 4, stand-by pump 6, electrically-controlled valve and control system 7,
The water inlet of feed pump and stand-by pump connects pond 5, and the outlet of feed pump and stand-by pump is divided into two-way, and a road connects water tower
Water inlet, a road is directly connected to municipal water supply end, and the outlet of water tower connects municipal water supply end, respectively at two water pumps and water tower
Between, on water pipe between two water pumps and municipal water supply end and between water tower and municipal water supply end, electrically-controlled valve, described electricity are installed
Control valve is by control system control.
Innovative point of the present utility model is:
Automatic recirculating bypass valve 3 and pressure transducer 2 are installed, pressure on the water pipe between two water pumps and municipal water supply end
Force transducer is connected with pond by control system control, automatic recirculating bypass valve.
In order to avoid there is problem present in background technology, we introduce the concept of minimum discharge, the most no matter which kind of situation,
All it is ensured that operating pump capacity is not less than a default flow, so that water pump safe operation.
Realize minimum discharge and need the control to minimum discharge, have employed automatic recirculating bypass valve in systems.Its essence
It is the automation equipment of a kind of machinery, there is non-return main valve and the bypass valve of integrated machine-shaping, by internal spring and thick stick
Bar mechanics principle, is automatically adjusted the size of bypass valve aperture.
For guaranteeing that feed pump will not damage, the flow (i.e. the rate of discharge of water pump) making entrance main valve is needed to be consistently greater than one in advance
If minimum discharge (can by adjust spring demarcate), and when downstream water consumption i.e. Main valve outlet flow is reduced to pre-
If during value, automatically opening up bypass valve and be automatically adjusted its aperture size, thus the minimum of water pump is maintained to set flow, and by unnecessary
Flow returns water supply pool by bypass valve.Even in worst situation, i.e. water supply network entirely without water consumption or unexpected disconnected
When opening, automatic recirculating bypass valve remains able to normally work thus maintains the minimum discharge of feed pump and avoid system overvoltage.
2 pressure set are defined by programming after the signal input PLC of the pressure transducer PIT being arranged on water main
Parameter, is respectively as follows:
P.S stand-by pump opens pump pressure；P.H stand-by pump termination of pumping pressure
It addition, automatic recirculating bypass valve separately has the pressure of an inner setting, it is defined as:
P.B bypass valve starts pressure
For reaching to control to be intended to, above three force value should be demarcated as:
P.B>P.H>P.S
Wherein P.B carries out mechanical calibrating on automatic recirculating bypass valve, P.H and P.S demarcates in PLC.
Native system includes outside water tower control system, Non-follow control and the control system of invariable pressure of routine, it is thus only necessary to three stations
Control permutator " water tower pattern-manually-constant voltage mode ", and control instruction is inputted PLC, and different according to input instruction operation
Control subprogram, different control models can be realized.
Under nominal situation, controlling permutator and point to " water tower pattern ", PLC receives control instruction, then run water tower liquid level control
Subprogram, system, automatically according to the signal of water tower liquid level LT, controls the start and stop of water pump group.As: low liquid level startup two pumps,
Middle liquid level starts pump, a high level termination of pumping etc..
If water tower fault or maintenance, permutator can be pointed to " constant voltage mode " position.In this case, system is according to pipe
The pressure condition of net starts and stops pump motor, or when water consumption is the least, enters mechanical automation pattern.
Start pressure and stand-by pump startup pressure by arranging bypass valve, when downstream water consumption is relatively big thus cause pressure of supply water to be less than
When bypass valve starts pressure P.B, bypass valve cuts out, and at this moment electrical automation system plays a leading role；Water consumption less thus
When causing pressure of supply water to be higher than bypass valve startup pressure P.B, bypass valve starts and is automatically adjusted its aperture, at this moment mechanical automation
System plays a leading role.Mechanical automation and electric automatization are organically combined by such design, jointly achieve control and are intended to:
1) if water consumption is the least, ductwork pressure will rise, and once starts pressure P.B more than the bypass valve of bypass valve, now
Bypass valve starts immediately, and be automatically adjusted bypass flow return pond, thus maintain run water pump minimum discharge, and avoid be
System overvoltage.
2) if water consumption increases so that ductwork pressure is less than P.B, bypass valve cuts out, and keeps a water pump operation and supplies water.
3) if water consumption continues to increase, when a water pump cannot meet, ductwork pressure will be caused to decline, once pressure drops to
Stand-by pump opens pump pressure P.S, the most automatically starts stand-by pump, by the operation of two water pumps thus increase output.
4) if water consumption starts again to reduce, when ductwork pressure rises above stand-by pump termination of pumping pressure P.H, stand-by pump is cut off,
One water pump continues to run with to ensure water supply seriality.
5) water consumption continues to reduce, and ductwork pressure will rise, possibly into state 1).
Thus change in various operating modes according to pressure change.
Above-described is only preferred implementation of the present utility model, it is noted that come for those of ordinary skill in the art
Say, on the premise of conceiving without departing from utility model, it is also possible to making some deformation and improvement, these broadly fall into this utility model
Protection domain.
Claims (3)
1. water tower-constant voltage duplex water system, including water tower, feed pump, stand-by pump, electrically-controlled valve and control system, supplies
The water inlet of water pump and stand-by pump connects pond, and the outlet of feed pump and stand-by pump is divided into two-way, and a road connects the water inlet of water tower
Mouthful, a road is directly connected to municipal water supply end, and the outlet of water tower connects municipal water supply end, respectively at two between water pump and water tower,
Installing electrically-controlled valve on water pipe between two water pumps and municipal water supply end and between water tower and municipal water supply end, described electrically-controlled valve is by controlling
System processed control, it is characterised in that: on the water pipe between two water pumps and municipal water supply end install automatic recirculating bypass valve and
Pressure transducer, pressure transducer is connected with pond by control system control, automatic recirculating bypass valve.
Water tower the most according to claim 1-constant voltage duplex water system, it is characterised in that: described control system includes
Water tower pattern-manual mode-constant voltage mode three station permutator.
Water tower the most according to claim 1-constant voltage duplex water system, it is characterised in that: it is P.S that stand-by pump opens pump pressure,
Stand-by pump termination of pumping pressure is P.H, and it is P.B that automatic recirculating bypass valve starts pressure, described P.B > P.H > P.S.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620507630.2U CN205822349U (en) | 2016-05-27 | 2016-05-27 | A kind of water tower-constant voltage duplex water system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620507630.2U CN205822349U (en) | 2016-05-27 | 2016-05-27 | A kind of water tower-constant voltage duplex water system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205822349U true CN205822349U (en) | 2016-12-21 |
Family
ID=57558278
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620507630.2U Expired - Fee Related CN205822349U (en) | 2016-05-27 | 2016-05-27 | A kind of water tower-constant voltage duplex water system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205822349U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109339155A (en) * | 2018-09-17 | 2019-02-15 | 三川智慧科技股份有限公司 | A kind of the water tower constant pressure water supply system and method for water pump alternation |
| CN110809503A (en) * | 2017-06-15 | 2020-02-18 | 株式会社达谊恒 | Welding gun and welding gun cooling system |
| CN111236361A (en) * | 2018-11-28 | 2020-06-05 | 西安理工大学 | Bypass pipeline water hammer protection method |
| CN112093951A (en) * | 2020-09-18 | 2020-12-18 | 湖南科尔顿水务有限公司 | Dual-core modularized integrated water supply system |
-
2016
- 2016-05-27 CN CN201620507630.2U patent/CN205822349U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110809503A (en) * | 2017-06-15 | 2020-02-18 | 株式会社达谊恒 | Welding gun and welding gun cooling system |
| US11370053B2 (en) | 2017-06-15 | 2022-06-28 | Daihen Corporation | Welding torch and welding torch cooling system |
| CN109339155A (en) * | 2018-09-17 | 2019-02-15 | 三川智慧科技股份有限公司 | A kind of the water tower constant pressure water supply system and method for water pump alternation |
| CN111236361A (en) * | 2018-11-28 | 2020-06-05 | 西安理工大学 | Bypass pipeline water hammer protection method |
| CN112093951A (en) * | 2020-09-18 | 2020-12-18 | 湖南科尔顿水务有限公司 | Dual-core modularized integrated water supply system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161221 |