CN108035405A - Water supply network water hammer electric control gear - Google Patents
Water supply network water hammer electric control gear Download PDFInfo
- Publication number
- CN108035405A CN108035405A CN201711308588.7A CN201711308588A CN108035405A CN 108035405 A CN108035405 A CN 108035405A CN 201711308588 A CN201711308588 A CN 201711308588A CN 108035405 A CN108035405 A CN 108035405A
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- Prior art keywords
- water
- control
- module
- water supply
- fire
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/06—Control using electricity
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
Abstract
The present invention relates to a kind of water supply network water hammer electric control gear.The frequency converter that is connected including control module and with the control module, for receiving the first of fire alarm host fire alarm linkage signal open into module, open pressure sensor block into module, for detecting pipeline pressure for detecting the second of fire cistern water level signal；Control module reception first, which is opened, opens into module, the collection signal of pressure sensor block into module, second and carries out joint control to each functional unit including water pump, frequency converter by software programming, realizes the soft start and soft stop control of fire pump；The equipment such as frequency converter, water pump and manifold pressure transmitter form the constant pressure water supply system of pipe network, realize the constant pressure water supply control function of pipe network.By controlling fire pump soft start and soft stop, the water hammer for eliminating fire_fighting pipe network produces the present invention, and can realize that the constant regulatory function of pressure makes holding pressure stability of the water supply network in fire pump outside the start and stop stage not change.
Description
Technical field
The present invention relates to a kind of water supply network water hammer electric control gear.
Background technology
Power station is located at Fujian Province Youxi river valley upstream in the street, installed capacity 150MW*2, underground power house structure, and 2008
Year power generation.The fire demand water in power station Zhong Kong buildings is derived from rear mountain head-tank（342 meters of elevation ▽）, head-tank is by underground factory
Two, room fire pump supplies water.
As shown in Figure 1, fire pump put into operation since starting mode of pump, stop moment pump outlet at water pressure fluctuations it is big, pressure
Power is fluctuated in 1.8MPa between 3.5MPa；There is high vibration, swings in hydraulic pipeline at 290 meters of elevation, and bellows is seriously turned round
Song, there are security risk for equipment.
Water supply pipe is when unexpected start and stop pump, since the effect of inertia of in-pipe flow causes the drastically change of in-pipe flow amount
Change, moment causes overpressure to be raised and lowered, and produces rivers shock wave, just as hammer, is meaning water hammer, there is the anasarca with shortness of breath
Hammer and negative water hammer.Occurs water hammer when power station fire pump starts, stops in the street at pump outlet, transient peak is up to just
2 times of normal operating pressure, the presence of water hammer is exactly that fire-fighting flow pipe on the net send out by the pipeline connecting part such as each telescopic joint and valve
The main reason for raw infiltration and damage.
The destructive power of water hammer is related with the momentum of current at that time, meets theorem of impulse, i.e. Ft=mv, that is, overpressure X
The flow velocity of the quality X water of action time=water.Existing way uses pipeline on fire pump outlet conduit and at elevation 290m
It is upper to install water-hammer arrester additional respectively, aqueduct water hammer overbottom pressure is received using synthetic rubber elastic internal bladder in water-hammer arrester, it is right
The instantaneous pressure of ripples is provided and rapidly and effectively buffered, so that manifold pressure is adjusted.
But although water pressure fluctuations caused by water hammering, fire-fighting are eliminated to a certain extent after installing water-hammer arrester additional
Water pump exit of pump water pressure fluctuations maximum when starting, stopping still reaching 2.5MPa, and it is mesh that the water hammer of such amplitude, which exists,
The main reason for infiltration of the pipeline connecting part such as each telescopic joint and valve generation on the net of preceding fire-fighting flow pipe and damage.
Therefore in the case where that cannot change the situation of quality of water, the application considers from the flow velocity for slowing down water and postpones its effect
The angle of time goes to reduce the water flow pressure in pipe, so as to eliminate its water hammer effect.For power station waterworks for firefighting in the street, prolong
The startup of long fire pump and dwell time, are incremented by and successively decrease, just can slow down water impact and reach with making exit of pump sluggish flow
To reduction water hammer effect.
The content of the invention
It is an object of the invention to provide a kind of water supply network water hammer electric control gear, by control fire pump it is soft open it is soft
Stop, the water hammer for eliminating fire_fighting pipe network produces, and can realize that the constant regulatory function of pressure makes water supply network opened in fire pump
The holding pressure stability stopped outside the stage does not change.
To achieve the above object, the technical scheme is that：A kind of water supply network water hammer electric control gear, including control mould
Block and the frequency converter being connected with the control module, for receive the first of fire alarm host fire alarm linkage signal open into module,
Pressure sensor block into module, for detecting pipeline pressure is opened for detecting the second of fire cistern water level signal；Control mould
Block receive first open into module, second open into module, the collection signal of pressure sensor block and by software programming to including water
Pump, each functional unit of frequency converter carry out joint control, realize the soft start and soft stop control of fire pump；Frequency converter, water pump and
The equipment such as manifold pressure transmitter form the constant pressure water supply system of pipe network, realize the constant pressure water supply control function of pipe network.
In an embodiment of the present invention, the control module uses PLC.
In an embodiment of the present invention, the control module is also associated with power station centralized control center, and entirely water system is supplied to realize
The automatic running monitoring and remote handle intervention of system.
Compared to the prior art, the invention has the advantages that：Apparatus of the present invention are automatic using PLC+ frequency converters
The advantages of Control System Design thinking, is embodied in：It is to start with from fire_fighting pipe network water hammer producing cause, by controlling fire pump soft
Soft stop is opened, the water hammer for eliminating fire_fighting pipe network produces.The automatic control system input constant regulatory function of pressure makes after starting mode of pump
Holding pressure stability of the water supply network in fire pump outside the start and stop stage does not change.
Brief description of the drawings
Fig. 1 is fire pump system before transformation.
Fig. 2 is water supply network water hammer electric control gear control block diagram of the present invention.
Fig. 3 is the constant pressure water supply system block diagram that frequency converter of the present invention, water pump and manifold pressure transmitter form pipe network.
Embodiment
Below in conjunction with the accompanying drawings, technical scheme is specifically described.
As shown in Figure 2,3, a kind of water supply network water hammer electric control gear of the invention, including control module and with the control mould
The frequency converter of block connection, for receiving first opening into module, for detecting fire water for fire alarm host fire alarm linkage signal
The second of pool water level signal opens the pressure sensor block into module, for detecting pipeline pressure；Control module receive first open into
Module, second open into module, pressure sensor block collection signal and by software programming to each work(including water pump, frequency converter
Energy unit carries out joint control, realizes the soft start and soft stop control of fire pump；Frequency converter, water pump and manifold pressure transmitter etc.
Equipment forms the constant pressure water supply system of pipe network, realizes the constant pressure water supply control function of pipe network.The control module uses PLC.Institute
State control module and be also associated with power station centralized control center, to realize that the monitoring of the automatic running of whole water system and remote handle are done
In advance.
It is below the specific implementation process of the present invention.
As shown in Fig. 2, the water supply network water hammer electric control gear of the present invention, using the automatic control system of PLC+ frequency converters,
Variable frequency regulating speed control is carried out to fire pump, realizes the soft start and soft stop of fire pump and the constant pressure water supply control function of pipe network.
PLC is the control core of whole system, possesses the powerful sequence such as signal collection, logic judgment and output order
Function.By software programming, the joint control to each functional unit such as water pump, frequency converter etc. is very neatly realized.In addition, it
Coupled by communication network with power station centralized control center background work station, realize human-computer dialogue.Power station centralized control center background work station
Patterned simulated technological process can realize whole water system automatic running monitoring and remote handle intervention.
The frequency control function of frequency converter be as a kind of application of new alternating current generator stepless speed regulation actuation techniques, with
Its unique excellent control performance is widely used in each speed control field.Frequency converter possesses multistage step start and stop function, energy
The stepped soft start and soft stop control to fire pump is enough completed to require, it is non-because its series difference and duration can flexibly be set
Often field adjustable is facilitated to make up to optimal control effect.
After the start and stop for solving the problems, such as fire pump, we are also based on the built-in closed loop control function of frequency converter, will become
The equipment such as frequency device, water pump and manifold pressure transmitter press the constant pressure water supply system of Fig. 3 composition pipe networks, complete water supply network
The constant regulatory function of pressure, makes holding pressure stability of the water supply network in fire pump outside the start and stop stage not change.Controlling
In, the closed-loop control of negative feedback type is most basic control mode, and is widely used.So-called closed-loop control refers to as quilt
The output of control returns to the input terminal as control in a certain way, and input terminal is applied and controls a kind of control influenced to close
System.The presence that system is disturbed due to certain so that reality output deviates desired value, and the deviation produced using negative-feedback is formed accordingly
Control action go eliminate deviation, system output quantity is returned on desired value.Compared with open-loop control system, it has suppression
The ability of interference is made, it is insensitive to element characteristic change, and the response characteristic of system can be improved.We shield micro- in practical application
Divide the adjustment effect of link（Differential coefficient Kd is put 1）, retaining ratio and integral element form PI controllers.According to PID control
Principle understands that proportional P is the response speed for the amplitude regulating system for playing amplification system error, scaling up COEFFICIENT K p
It can accelerate to adjust and reduce static difference, but Kp crosses conference and causes system overshoot to produce vibration, system stability is deteriorated；Introduce integration
Adjusting is to be improved to make system eliminate steady-state error without margin, and the power of integral action depends on the time constant Ti of integration,
The adjustment effect that Ti will reduce integral element is reduced, the over control in proportional component is advantageously reduced, system is tended towards stability,
But system eliminates slowing for static difference.Therefore, the effect of proportional component and integral element is interactional its different parameters
Adjust system Control platform directly affected.How that determines the parameter Kp and Ti of PI controllers.From using angle
See, we require controlled device leading indicator to reach design requirement.Usually we use trial and error procedure, according to frequency converter
Each pid parameter to the influence degree of system by first determining to determine integration time constant Ti after Proportional coefficient K p the step of, pass through and be
System test run, is repeated and adjust-adjusts-adjust again, make up to optimal control effect.
Achievement and application field：
By transforming the electric control system of two fire pumps.Using the automatic control mode of PLC+ frequency converters, become
Frequency device selects Ai Mosheng frequency converter TD2100 series Water supply special inverters.By trial operation more than a year, fire pump starts,
For water outlet water pressure fluctuations in 1.8MPa between 2.0MPa, hydraulic pressure climbing is less than 120 % during stopping；Extinguishing pipe at elevation 290m
The big vibration of road production, swing twisting have substantially eliminated.
It is the fluid of medium in pipe network course of conveying that the present invention, which is equally applicable for using water or other liquid, when moment opens,
Closing valve or moment start, stop caused flow and pressure jump when delivery pump operates and the defeated of water hammer is produced in pipe
Send pipe network system, such as water-supply systems, industrial premises waterworks for firefighting, the multiple branch circuit technical water supply system in power station
Deng.PLC joint controls pattern provided by the invention and the frequency-changing pressure stabilizing tune built based on closed loop control function built in frequency converter
Saving function has unique excellent control performance.
Above is the preferable case study on implementation of the present invention, all changes made according to technical solution of the present invention, caused function
When acting on the scope without departing from technical solution of the present invention, protection scope of the present invention is belonged to.
Claims (3)
- A kind of 1. water supply network water hammer electric control gear, it is characterised in that：The change being connected including control module and with the control module Frequency device, for receiving first opening into module, for detecting fire cistern water level signal for fire alarm host fire alarm linkage signal Second open pressure sensor block into module, for detecting pipeline pressure；Control module reception first is opened opens into module, second Enter module, the collection signal of pressure sensor block and each functional unit including water pump, frequency converter is carried out by software programming Joint control, realizes the soft start and soft stop control of fire pump；The equipment such as frequency converter, water pump and manifold pressure transmitter composition pipe The constant pressure water supply system of net, realizes the constant pressure water supply control function of pipe network.
- 2. water supply network water hammer electric control gear according to claim 1, it is characterised in that：The control module uses PLC.
- 3. water supply network water hammer electric control gear according to claim 1, it is characterised in that：The control module is also associated with Power station centralized control center, to realize the monitoring of the automatic running of whole water system and remote handle intervention.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711308588.7A CN108035405A (en) | 2017-12-11 | 2017-12-11 | Water supply network water hammer electric control gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711308588.7A CN108035405A (en) | 2017-12-11 | 2017-12-11 | Water supply network water hammer electric control gear |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108035405A true CN108035405A (en) | 2018-05-15 |
Family
ID=62101801
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711308588.7A Pending CN108035405A (en) | 2017-12-11 | 2017-12-11 | Water supply network water hammer electric control gear |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108035405A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112096623A (en) * | 2020-09-25 | 2020-12-18 | 云南大红山管道有限公司 | Automatic shutdown control method for pump set of long-distance large-pipe-diameter pipeline water delivery pump station |
| CN117950354A (en) * | 2024-03-25 | 2024-04-30 | 江苏铭星供水设备有限公司 | Big data-based remote control system and method for water supply pump station |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2416140Y (en) * | 2000-03-24 | 2001-01-24 | 李义 | Per pump equalizing distribution frquency transformer microcomputer constant voltage variable water supply equipment |
| JP2007107198A (en) * | 2005-10-11 | 2007-04-26 | Kawamoto Pump Mfg Co Ltd | Water supply device |
| CN104373331A (en) * | 2013-08-15 | 2015-02-25 | 西安大盛消防检测有限公司 | Fire pump water flow detection control device |
| CN204327464U (en) * | 2014-11-27 | 2015-05-13 | 上海锐帕节能科技有限公司 | A kind of conversion |
| CN205776544U (en) * | 2016-05-31 | 2016-12-07 | 广州市明日自动化科技有限公司 | A kind of frequency conversion motor constant pressure water supply control system |
-
2017
- 2017-12-11 CN CN201711308588.7A patent/CN108035405A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2416140Y (en) * | 2000-03-24 | 2001-01-24 | 李义 | Per pump equalizing distribution frquency transformer microcomputer constant voltage variable water supply equipment |
| JP2007107198A (en) * | 2005-10-11 | 2007-04-26 | Kawamoto Pump Mfg Co Ltd | Water supply device |
| CN104373331A (en) * | 2013-08-15 | 2015-02-25 | 西安大盛消防检测有限公司 | Fire pump water flow detection control device |
| CN204327464U (en) * | 2014-11-27 | 2015-05-13 | 上海锐帕节能科技有限公司 | A kind of conversion |
| CN205776544U (en) * | 2016-05-31 | 2016-12-07 | 广州市明日自动化科技有限公司 | A kind of frequency conversion motor constant pressure water supply control system |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112096623A (en) * | 2020-09-25 | 2020-12-18 | 云南大红山管道有限公司 | Automatic shutdown control method for pump set of long-distance large-pipe-diameter pipeline water delivery pump station |
| CN112096623B (en) * | 2020-09-25 | 2022-05-24 | 云南大红山管道有限公司 | Automatic shutdown control method for pump set of long-distance large-pipe-diameter pipeline water delivery pump station |
| CN117950354A (en) * | 2024-03-25 | 2024-04-30 | 江苏铭星供水设备有限公司 | Big data-based remote control system and method for water supply pump station |
| CN117950354B (en) * | 2024-03-25 | 2024-05-28 | 江苏铭星供水设备有限公司 | Big data-based remote control system and method for water supply pump station |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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| RJ01 | Rejection of invention patent application after publication | ||
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Application publication date: 20180515 |