CN106150998A - The control method of pump installation, Long-Range Surveillance Unit and pump installation - Google Patents
The control method of pump installation, Long-Range Surveillance Unit and pump installation Download PDFInfo
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- CN106150998A CN106150998A CN201610320258.9A CN201610320258A CN106150998A CN 106150998 A CN106150998 A CN 106150998A CN 201610320258 A CN201610320258 A CN 201610320258A CN 106150998 A CN106150998 A CN 106150998A
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- Prior art keywords
- pressure
- goal pressure
- pump
- controlling curve
- goal
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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
- F04B49/08—Regulating by delivery pressure
-
- 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
- F04B2205/00—Fluid parameters
- F04B2205/05—Pressure after the pump outlet
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Non-Positive-Displacement Pumps (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
The present invention provides the control method of pump installation, Long-Range Surveillance Unit and pump installation.Most suitable goal pressure controlling curve corresponding with operational situation is automatically determined in presumption terminal pressure constant control.Pump installation has the pump of transfer liquid and drives the motor of pump.It addition, pump installation has the control portion controlling motor in the way of making the discharge side pressure of pump become the goal pressure on goal pressure controlling curve.Further, when the meansigma methods of control portion goal pressure within the 1st stipulated time is less than the pressure threshold of the regulation on goal pressure controlling curve so that goal pressure reduce mode correction goal pressure controlling curve.It addition, control portion when more than the rotary speed threshold value that the meansigma methods of the rotating speed of the motor in the 2nd stipulated time is regulation in the way of making goal pressure increase correction goal pressure controlling curve.
Description
Technical field
The present invention relates to the control method of pump installation, Long-Range Surveillance Unit and pump installation.
Background technology
Pump installation is widely used as to building for the water supply installation fed water.Fig. 1 is the signal representing common water supply installation
Figure.As it is shown in figure 1, the suction inlet of water supply installation 100 is connected with water pipe 4 or not shown water reception tank via ingress pipe 5.Supplying water
Connect in the outlet of device 100 and have feed pipe 7, the water supply utensil (such as faucet) of each layer of this feed pipe 7 and building
Connection.Water supercharging from water pipe 4 or water reception tank each water supply utensil to building are supplied water by water supply installation 100.
The water supply installation 100 that the suction side of pump directly links via ingress pipe 5 and water pipe 4 has pump 2, drives this pump 2
Motor 3 and the converter 20 as driving means of variable speed drive motor 3 as the source of driving.It addition, water supply installation 100
Have: be arranged in the anti-backflow device 25 of the suction side of pump 2, be arranged in the pressure transducer of the suction side of anti-backflow device 25
21, the check-valves 22 being arranged in the discharge side of pump 2 and the flow switch 24 of the discharge side being arranged in check-valves 22, pressure sensing
Device 26 and pressurized tank 28.These structural elements are accommodated in the housing 30 of water supply installation 100.Additionally, there is also, not there is housing
The water supply installation of the type of 30.
Bypass pipe 8 for only carrying out supplying water by the pressure of water pipe 4 is located between ingress pipe 5 and feed pipe 7, on side
Siphunculus 8 is provided with check-valves 23.In the example depicted in figure 1, it is provided with two groups of pumps 2, motor 3, check-valves 22 and flow switch 24,
They are arranged side by side.In addition it is also possible to arrange one group or the pump of more than three groups, motor, check-valves and flow switch.Directly
In coupled water supply installation, as it is shown in figure 1, the suction side of pump 2 is connected with water pipe 4, but in the water supply installation of water reception tank formula, pump
The suction side of 2 is connected with water reception tank via ingress pipe 5.In the case of the water supply installation of this water reception tank formula, do not have shown in Fig. 1
Anti-backflow device 25, the pressure transducer 21 of suction side and bypass pipe 8.
Check-valves 22 is located on the discharge pipe 32 that the outlet with pump 2 is connected, and is the inverse of water during for preventing pump 2 from stopping
The valve of stream.Flow switch 24 is that detection flow of the water of flowing in discharge pipe 32 reduces to setting, i.e. detects the very few water yield
Flow detector.Pressure transducer 26 be for measure the discharge side pressure of pump 2 (after, discharge side pressure representative is by pressure
Sensor 26 measure force value) hydraulic pressure mensuration device.Pressurized tank 28 is the discharge side pressure during keeping pump 2 to stop
Pressure vessel.
Water supply installation 100 has the control portion 35 controlling water supply action.Converter 20, flow switch 24, pressure transducer
21, pressure transducer 26 is connected with control portion 35 via holding wire.When the very few water yield being detected by flow switch 24, control portion
35 send instruction to converter 20 in the way of temporarily improving the running speed of pump 2, make the fortune of pump 2 in pressurized tank 28 after pressure accumulation
Turn and stop.
When using water when pump 2 stops in building, the discharge side pressure of pump 2 reduces.When this discharge side
During the startup pressure that pressure drop as little as specifies, control portion 35 makes pump 2 start.Specifically, control portion 35 is to start driving of motor 3
Dynamic mode sends instruction to converter 20.In pump 2 operates, carry out estimating the constant control of terminal pressure based on discharge side pressure
System.
When the use of the water in building reduces, flow switch 24 detects the very few water yield, and by this detection signal to control
Portion 35 processed sends.Control portion 35 receives this detection signal, and issues an instruction to make pump 2 rotating speed be increased up discharging to converter 20
Lateral pressure reaches the stopping pressure of regulation, makes pump 2 stop in pressurized tank 28 after pressure accumulation.
In presumption terminal pressure constant control, by correspondingly making mesh with the drag losses in the feed pipe in building
Mark pressure changes rightly, and will be located in the hydraulic pressure control the water supply utensil of end from water supply installation 100 is constant.Fig. 2 is
For illustrating to estimate the service performance curve chart of the pump of an example of terminal pressure constant control.In the left figure of Fig. 2, transverse axis
Being the flow of water, the longitudinal axis is discharge pressure i.e. lift (head).It addition, transverse axis is revolution speed in the right figure of Fig. 2, the longitudinal axis is
Discharge pressure i.e. lift (head).
PA shown in Fig. 2 be discharge side pressure when the maximum stream flow of the water supply utensil of water supply installation 100 to end (with
Under be designated as PA).Maximum stream flow said here refers to use flow during all water supply utensils in building with maximum amount of water.
It addition, PB is the discharge side pressure (being designated as PB below) during the cutout operating of the water supply utensil from water supply installation 100 to end.?
Discharge side pressure when this described cutout operates refers to that in all water supply utensils in building, flow will be from water supply when being 0
Device 100 is positioned at the supply pressure needed for the water supply utensil of the highest and farthest position (i.e. the position of end) and to this water supply
The pressure loss produced in pipeline till utensil is worth obtained by being added.The curve represented with reference NMAX is with by pump 2
The maximum speed NMAX that determines of performance operate pump 2 time the head curve of pump 2.The curve represented with reference NMIN be with
Reach rotating speed (cutout rotating speed) NMIN of pressure PB operate pump 2 time the head curve of pump 2.It addition, P05 is maximum speed NMAX
Under cutout operating time discharge side pressure (below maximum speed is designated as NMAX, will cutout operating time PB under rotating speed note
For NMIN, P05 will be designated as with lift during NMAX cutout operating).The generally delivery flow of pump is directly proportional to the rotating speed of pump, and pump
Square being directly proportional of rotating speed of total head and pump, the conic section therefore passed through from PA and PB becomes the water supply utensil of end
Pipe resistance curve R.By making the pump 2 intersection point as head curve Nm Yu pipe resistance curve R under arbitrary rotating speed
Operation point at operate, and the pressure PB in the water supply utensil of end is remained constant.
The right figure using Fig. 2 illustrates the goal pressure controlling curve C for estimating terminal pressure constant control.In figure
C0 is cutout run curve.In the case of the suction side pressure of pump 2 is 0, C0 be the point from pressure=0 and rotating speed=0 and
The conic section that the point of P05 Yu NMAX passes through.Goal pressure controlling curve C is the point of the point from PA Yu NMAX and PB Yu NMIN
The conic section passed through.From the water supply utensil of water supply installation 100 to end, pressure PB control (is i.e. being passed through target for constant
Pressure PA carries out estimating terminal pressure constant control) in the case of, as it was earlier mentioned, due to the delivery flow of pump 2 and turning of pump 2
Rapid-result direct ratio, so carrying out target setting according to the rotating speed Nm and goal pressure controlling curve C of the pump 2 corresponding with current flow QN
Pressure PN.
Therefore, when flow is less, the goal pressure of discharge side pressure reduces, correspondingly the required drive fall of pump 2
Low and rotating speed reduces, and is achieved in energy-saving operation.
Additionally, in fig. 2, when setting pressure PB in the way of pressure PB is equal with pressure PA, the row of execution of control portion 35
Go out pressure constant control rather than presumption terminal pressure constant control.In this case, control portion 35 keeps with discharge side pressure
The mode of PA (=PB) controls the rotating speed of pump 2.
Prior art literature
Patent documentation
Patent documentation 1: International Publication the WO2012/099242nd
Patent documentation 2: Japanese Unexamined Patent Publication 2014-214715 publication
Patent documentation 3: Japanese Unexamined Patent Publication 2014-214743 publication
Summary of the invention
In above-mentioned presumption terminal pressure constant control, about goal pressure controlling curve C, real exactly owing to being difficult to
Border measure set by PA and PB of building, so in order in building all of water supply utensil (such as faucet)
With enough pressure feed water, and PA and PB is set as the value to a certain extent with enough and to spare.Therefore, patent documentation 1 carries
Go out a kind of flow being able to ensure that needs and can be with the water supply installation of lower rotation speed operation pump.According to patent documentation 1, will be many
Individual goal pressure controlling curve is stored in advance in control portion, and pump is controlled based on some goal pressure controlling curve.
Therefore, by selecting most suitable goal pressure controlling curve from pre-prepd multiple goal pressure controlling curve, and energy
Enough realize energy-saving operation.
But, the water supply installation described in patent documentation 1 manually selects goal pressure controlling curve, and passes through hands
Move and switch over, automatically do not carry out selection and the switching of goal pressure controlling curve.Further, since the mesh used
Mark Stress control curve is to select from the multiple goal pressure controlling curve being stored in advance in control portion, so cannot root
The adjustment of goal pressure controlling curve self is carried out according to the operational situation of water supply installation.The operational situation of water supply installation may root
Change according to the time.Such as, in school, the usage amount at time of having a rest water can sharply increase, and does not uses at night
Water.Like this, may change, it is desirable to automatically adjust according to time or other factors due to the operational situation of water supply installation
Whole most suitable goal pressure controlling curve.And, the most energy-conservation in order to realize, it is also desirable to adjust most suitable target pressure
Power controlling curve.
It addition, the water supply installation change based on discharge pressure during pump startup described in patent documentation 2,3 adjusts
Suitably goal pressure controlling curve.But, such as in situation using pump installation in the extensive apartment that resident family's number is many etc.,
It is to use water in 24 hours mostly.In this case, the chance stopping and starting pump is few, adjusts the chance of goal pressure controlling curve
Tail off.Especially, in newly-built apartment etc., in the situation that the number of moving in is gradually increased etc., if using when the number of moving in is few
Set goal pressure controlling curve, then when moving in number and increasing, output is the most not enough.If it addition, from the beginning with
Standby move in the situation and set target pressure controlling curve that number increases, then when the number of moving in is few, energy loss can increase.
The present invention researches and develops in view of the above circumstances, its target be presumption terminal pressure constant control in automatically
Determine most suitable goal pressure controlling curve corresponding with operational situation.
The pump installation of the present invention has the pump of transfer liquid and drives the motor of pump.It addition, pump installation has so that pump
Discharge side pressure becomes the mode of the goal pressure on goal pressure controlling curve and controls the control portion of motor.Further, control portion
When the meansigma methods of the goal pressure within the 1st stipulated time is less than the pressure threshold of the regulation on goal pressure controlling curve so that
The mode correction goal pressure controlling curve that goal pressure reduces.It addition, the rotating speed of the motor that control portion is within the 2nd stipulated time
Meansigma methods be regulation rotary speed threshold value more than time by make goal pressure increase in the way of correction goal pressure controlling curve.
According to described structure, the pump installation of the present invention can automatically determine corresponding with the operational situation of pump installation
Suitably goal pressure controlling curve.
It addition, the rotary speed threshold value of regulation can also be the rated speed of motor.
Thus, when driving motor with high rotating speed in the range of the 2nd stipulated time, it is possible to increase goal pressure.
It addition, the pressure threshold of regulation can also be the intermediate value of the goal pressure on goal pressure controlling curve.
Thus, within the 1st stipulated time, when compared with the intermediate value of the goal pressure on goal pressure controlling curve low
When pressure side drives motor continually, it is possible to reduce goal pressure.
It addition, control portion can be in the meansigma methods of goal pressure than the pressure threshold of the regulation on goal pressure controlling curve
Correction goal pressure controlling curve hour in the way of making goal pressure only reduce the 1st pressure.And, it is also possible to putting down at rotating speed
Average be regulation rotary speed threshold value more than time in the way of making goal pressure only increase 2nd pressure bigger than the 1st pressure correction mesh
Mark Stress control curve.
Thereby, it is possible to the discharge side insufficient pressure of suppression pump.
The Long-Range Surveillance Unit of the present invention communicates with pump installation, and wherein pump installation has the transfer pump of liquid, driving
The motor of pump and control motor in the way of making the discharge side pressure of pump become the goal pressure on goal pressure controlling curve
Control portion.Long-Range Surveillance Unit has: the pressure of the goal pressure receiving the rotating speed acceptance division of the rotating speed of motor, reception pump receives
Portion and the revision directive sending part that the instruction revising goal pressure controlling curve is sent to control portion.Revision directive sending part
The meansigma methods of the goal pressure of the reception within the 1st stipulated time is less than the pressure threshold of the regulation on goal pressure controlling curve
Time by by make goal pressure reduction in the way of correction goal pressure controlling curve instruction to control portion send.Refer to it addition, revise
Time more than the rotary speed threshold value making the meansigma methods of the rotating speed of the motor of sending part reception within the 2nd stipulated time be regulation will so that
The instruction of the mode correction goal pressure controlling curve that goal pressure increases sends to control portion.
According to described structure, the Long-Range Surveillance Unit of the present invention can be automatically determined by remotely operation and fill with pump
The corresponding most suitable goal pressure controlling curve of operational situation put.
The control method of the pump installation of the present invention is to have the pump of transfer liquid and drive motor so that the row of pump of pump
Go out lateral pressure and become the mode of goal pressure on goal pressure controlling curve to control the control method of the pump installation of motor.?
In the control method of this pump installation, obtain the rotating speed of motor, and obtain the goal pressure of pump.Further, in the controlling party of pump installation
In method, the meansigma methods of the goal pressure got within the 1st stipulated time is than the pressure of the regulation on goal pressure controlling curve
Power threshold value hour is correction goal pressure controlling curve in the way of making goal pressure reduction.It addition, in the control method of pump installation
In, so that goal pressure increases when the meansigma methods of the rotating speed got within the 2nd stipulated time is more than the rotary speed threshold value of regulation
Big mode correction goal pressure controlling curve.
According to described structure, the control method of the pump installation of the present invention can automatically determine the operating shape with pump installation
The corresponding most suitable goal pressure controlling curve of condition.
Accompanying drawing explanation
Fig. 1 is the schematic diagram representing common water supply installation.
Fig. 2 is the service performance curve chart for illustrating to estimate the pump of an example of terminal pressure constant control.
Fig. 3 is the signal of the water supply installation of an example of the pump installation being denoted as an embodiment of the invention
Figure.
Fig. 4 is the pump of an example of the presumption terminal pressure constant control for an embodiment of the invention is described
Service performance curve chart.
Fig. 5 is the flow chart of the example representing that controlling curve setting processes.
Fig. 6 is the curve chart representing the example that goal pressure controlling curve is adapted to low-pressure side.
Fig. 7 is the curve chart representing another example that goal pressure controlling curve is adapted to low-pressure side.
Fig. 8 is the curve chart of an example of the time change representing discharge side pressure.
Fig. 9 is the curve chart of another example of the time change of the goal pressure representing pump.
Figure 10 is the signal of the example representing the pump installation of an embodiment of the invention and Long-Range Surveillance Unit
Figure.
Figure 11 is the showing of another example representing the pump installation of an embodiment of the invention and Long-Range Surveillance Unit
It is intended to.
Description of reference numerals
1,1A, 100 water supply installations
2 pumps
3 motors
8 bypass pipes
20 converters
20a speed probe
21 pressure transducers
22,23 check-valves
24 flow switches
25 anti-backflow devices
26 pressure transducers
28 pressurized tanks
35,40 control portion
46 configuration parts
47 storage parts
48 operational parts
49 display parts
50 I/O portions
51 operating panels
52 communication units
60 Long-Range Surveillance Units
66 configuration parts
67 storage parts
68 operational parts
69 display parts
70 I/O portions
71 operating panels
72 communication units
80 communicators
90 common lines
Detailed description of the invention
Embodiments of the present invention are described referring to the drawings.Additionally, in the accompanying drawings, same or equivalent structure is wanted
Element marks identical reference and the repetitive description thereof will be omitted.
(the 1st embodiment)
Fig. 3 is the signal of the water supply installation of an example of the pump installation being denoted as an embodiment of the invention
Figure.As it is shown on figure 3, the control portion 40 of water supply installation 1 has storage part 47, operational part 48, I/O portion 50, configuration part 46 and display
Portion 49.Configuration part 46 and display part 49 are arranged on the operating panel 51 of water supply installation 1.Additionally, the structure beyond control portion 40
Roughly the same with the structure of the conventional water supply installation 100 shown in Fig. 1.
Configuration part 46 for setting the pass between delivery flow Q and the discharge side pressure P that represent pump 2 by peripheral operation
The various setting values of the goal pressure controlling curve etc. of system.Various setting values set in configuration part 46 are stored in storage
In portion 47.As an example, stopping when user can input PB, PA, NMAX, P05, the very few water yield via configuration part 46
Stop pressure Pd2, start the information needed for pressure Pd1 and other control.
Display part 49 is as man machine interface function, the various numbers of the setting value etc. that display is stored in storage part 47
According to and the operational situation (operating condition) of current pump 2, the operating of such as pump 2 or stopping, operating frequency, electric current, discharge side pressure
Power, feed pressure (directly linking situation about supplying water), water reception tank alarm etc..
As storage part 47, use the memorizeies such as RAM, ROM.In storage part 47, storage has the control flow chart with Fig. 5
Data (PB, the duration of runs, the aggregate-value of operation result in the control program represented and various data, such as operational part 48
Deng), force value (discharge side pressure, feed pressure), the data inputted by configuration part 46 and by I/O portion 50 input or
Data etc. by I/O portion 50 output.
As I/O portion 50, use port etc..I/O portion 50 receives the output valve of pressure transducer 26 and flow switch 24
Signal also sends to operational part 48.It addition, in the present embodiment, the speed probe 20a of the rotating speed Nm of detection motor 3 installs
On converter 20.I/O portion 50 via converter 20 receive the detected value of speed probe 20a (the rotating speed Nm of motor 3) and
Send to operational part 48.But, speed probe 20a is not limited to be located on converter 20.It addition, at speed-sensorless
In the case of ground uses the converter 20 carrying out rotating speed control, speed probe 20a does not exists and is virtual.I/O portion 50 is also
The input and output of the signal in communicating.
As operational part 48, use CPU.Operational part 48 based on the program being stored in storage part 47 and various data, with
And the signal from I/O portion 50 input, carry out the determination of PA, PB, the measurement of time (duration of runs, dwell time), accumulative
Computing (aggregate-value), the process of communication data, the computing of goal pressure, the computing of frequency instruction value (rotating speed of target), target pressure
The correction etc. of power controlling curve.Output from operational part 48 is imported into I/O portion 50.
It addition, I/O portion 50 and converter 20 are connected with each other by RS422,232C, the communication modes such as 485.From I/O portion
50 send the control signals such as various setting value, frequency instruction value, start stop signal (operating/stop signal) to converter 20, from change
Frequently device 20 progressively sends the operational situations (operating condition) such as the frequency values of reality, current value to I/O portion 50.
Additionally, as the control signal received by transmission between I/O portion 50 and converter 20, it is possible to use analogue signal
And/or digital signal.For instance, it is possible to speed etc. is used analogue signal, operating halt instruction etc. is used digital signal.
Fig. 4 is the pump of an example of the presumption terminal pressure constant control for an embodiment of the invention is described
Service performance curve chart.Especially, as long as no record, then use the reference identical with Fig. 2 and omit the description.First
First, owing to PA and PB is difficult to actual measurement, so when arranging water supply installation 1, according to height based on building and amount etc.
The guess value of the output determined is to set PA and PB.
Pd1 shown in Fig. 4 is the startup pressure as threshold value for making pump 2 start.Here, as an example, will
Start pressure Pd1 and be set as the value (PA-3m) after PA deducts 3m (rice).
When using water when motor 3 and pump 2 stop, discharge side pressure Pm reduces.Further, when by pressure sensing
The discharge side pressure Pm of device 26 detection is when being reduced to startup below pressure Pd1 set in advance, control portion 40 start motor 3 thus
Start pump 2.
As shown in the right figure of Fig. 4, control portion 40 carrys out target setting based on goal pressure controlling curve C and current rotating speed Nm
Pressure PN, and the rotating speed (speed) of variable-ratio control motor 3 (pump 2) is carried out via converter 20.That is, control portion 40 controls to become
Frequently device 20 alternating voltage or the DC voltage of regulation are put on motor 3, makes motor 3 speed change.Rotation along with motor 3
Becoming at a high speed, the output of pump 2, increases, and discharge side pressure Pm increases.Control portion 40 is with discharge side pressure Pm and goal pressure PN
Consistent mode controls the rotating speed of pump 2.Additionally, when driving pump 2, such as by shaking with pulse width modulation (PWM) or pulse
Width modulation (PAM) infinitely controls alternating voltage, and can be efficiently with the pump 2 that operates at a high speed.
In pump 2 operates, when usage amount minimizing, discharge reduction and flow switch 24 action of water, the operating of pump 2 stops
Only.When this pump 2 stops, by the running speed temporarily improving pump 2 (motor 3), discharge side pressure Pm being improved to regulation
Stopping pressure Pd2, and enough water is carried out pressure accumulation (pressure accumulation operating) in pressurized tank 28.Finally, by pressurized tank 28
Water boost to stop pressure Pd2 state under stop motor 3.
In addition it is also possible to cancel the signal from flow switch 24 within the regular hour that pump 2 starts after starting.By
This, is even if in the case of cause a period of time after pump 2 starts in the various conditions due to supply equipment in, water is immobilising,
It also is able to prevent from stopping pump 2 because the very few water yield being detected.Alternatively, it is also possible to be, with the discharge side pressure Pm at pump 2 than regulation
Even if in the case of value is low from flow switch 24 send come signal the most do not carry out pump 2 stopping process mode control portion 40 is entered
Row programming.Thereby, it is possible to the frequency that the startup reducing the stopping process of pump 2 and pump 2 subsequently processes, thus seek the resistance to of device
The raising of long property and long lifetime.
Control portion 40 can carry out computing based on PA and PB being stored in storage part 47 to stopping pressure Pd2.Such as,
In the way of becoming PA or PB+3m, computing is carried out to stopping pressure Pd2.It addition, control portion 40 also is able to the startup pressure to pump 2
Pd1 carries out computing, such as, if by the difference of PA Yu PB within 3m, starting in the way of pressure Pd1 becomes PA-3m and carry out computing.
Alternatively, it is also possible to PB is carried out computing according to the PA of input.It is such as high building in the extreme higher position of water end
Layer 5 in the case of, PA can be set to 14m, the 12m about reducing by 15% from PA is set to PB.Like this, PB is set
Fixed low about 15% it is because than PA, it is contemplated that the amount of pipe arrangement resistance is about about 15%.
For example, it is also possible to input PA and ratio D% via the configuration part 46 in above-mentioned control portion 40, and pass through PB=
PA-(PA × D%) obtains PB.Or input pressure PA and differential pressure PD also obtain PB by PB=PA-PD.
Control portion 40 operating condition based on pump 2 revises goal pressure controlling curve.Fig. 5 is to represent to be performed by control portion
The flow chart of an example that processes of controlling curve setting.Additionally, only carrying out presumption end pressure after step S110 of Fig. 5
Performing in the case of power constant control, the pressure accumulation in pump stops and when the little water yield stops does not performs when operating.
When the power initiation in control portion 40, first control portion 40 sets initial goal pressure controlling curve C (step
S100).This initial goal pressure controlling curve C is the goal pressure controlling curve C determined by PA, PB and NMAX, NMIN, for
The benchmark revised.About the setting of initial goal pressure controlling curve C, such as when factory shipment using as pump performance
NMAX and cutout pressure P05 is stored in storage part 47, and when arranging water supply installation 1, it is possible to by user to configuration part 46
Input PA, PB also sets based on the data being stored in storage part 47.It addition, control song in the goal pressure currently utilized
In the case of line is stored in storage part 47, it is possible to use the goal pressure controlling curve stored.
Then, control portion 40, when pump 2 starts and starts to estimate terminal pressure constant control, as initial treatment will turn
Speed aggregate-value Sn and pressure aggregate-value Sp resets to value 0 (step S110), and starts to reset the timing (step of clocking value ta
S120).When starting timing, control portion 40 obtains the rotating speed Nm of the motor 3 from speed probe 20a and by presumption end
Goal pressure PN (step S130) that Stress control calculates.The rotating speed Nm got is accumulated to rotating speed aggregate-value by control portion 40
In Sn, and goal pressure PN got is accumulated in pressure aggregate-value Sp (step S140).Further, control portion 40 repeats
Perform step S130, the process of S140, until clocking value ta becomes more than reference value tr1 (step S150).It is to say, control
The rotating speed Nm of portion 40 accumulative motor 3 during stipulated time tr1 and goal pressure PN.
When clocking value ta becomes more than reference value tr1, control portion 40 comes with number of repetition K1 of step S130～S150
Except rotating speed aggregate-value Sn and pressure aggregate-value Sp, and calculate mean speed Mn and average goal pressure Mp (step S160).
Then, mean speed Mn is compared (step S170) with rotary speed threshold value Nr1 by control portion 40.Here, in this reality
Execute and rotary speed threshold value Nr1 is set to rotating speed Nmax by mode.The process of this step S170 judges that whether motor 3 is in goal pressure control
Driven near the operation point of the maximum pressure on curve C.But, rotary speed threshold value Nr1 can also be to deduct rule from rotating speed Nmax
Fixed nargin sets.
When mean speed Mn is less than rotary speed threshold value Nr1 (step S170: no), control portion 40 judges into motor 3 not
Driven at the operation point of height output continually.In this case, then control portion 40 by average pressure Mp and pressure threshold
Ps compares (step S190).In the present embodiment, pressure threshold Ps is set to PA and PB of goal pressure controlling curve
Intermediate value.The processing of this step S190 judges at the operation point of the motor 3 low output whether on goal pressure controlling curve
Driven.But, in the process of step S190, as long as the pressure threshold on goal pressure controlling curve can be with average pressure
The value that Mp compares, is not limited to the intermediate value of PA Yu PB.
Control portion 40 is (step when mean speed Mn is more than pressure threshold Ps less than rotary speed threshold value Nr1 and average pressure Mp
Rapid S170: no, step S190: no), it is judged that become motor 3 by current goal pressure controlling curve at preferred operation point
Driven.In this case, control portion 40 does not revise goal pressure controlling curve and returns to the process of step S110.
Control portion 40 is (step when mean speed Mn is less than pressure threshold Ps less than rotary speed threshold value Nr1 and average pressure Mp
S170: no, step S190: yes), it is judged that become motor 3 by current goal pressure controlling curve only in the operation point of low output
Place is driven.In this case, control portion 40 judges into and current goal pressure controlling curve can be displaced to low-pressure side, and
Goal pressure controlling curve is adapted to low-pressure side (step S200), returns to the process of step S110.
On the other hand, control portion 40 (step S170: yes) when mean speed Mn is more than rotary speed threshold value Nr1, it is judged that become
Motor 3 is driven near the operation point by current goal pressure controlling curve maximum pressure on goal pressure controlling curve
Dynamic.In this case, control portion 40 judges into by current goal pressure controlling curve to the water supply of supply equipment likely
Deficiency, is adapted to goal pressure controlling curve high pressure side (step S180), returns to the process of step S110.Here, it is excellent
Selected control portion 40 revises greatly when goal pressure controlling curve is adapted to high pressure side compared with when being adapted to low-pressure side.
In controlling curve setting described above processes, the process below repeated execution of steps S110, revise target
Stress control curve.But, it is not limited to such example, it is also possible to be, is only performing step with predetermined number of times
During the process of rapid below S110, control portion 40 finishing control curve setting processes.Alternatively, it is also possible to be, do not revising target
During Stress control curve, it is judged that the goal pressure controlling curve becoming current is suitable for, and control portion 40 finishing control curve setting processes.
Control portion 40, when finishing controlling curve setting and processing, can hold predetermined timing (such as every several days etc.) again
Row controlling curve setting processes, it is also possible to process based on again performing controlling curve setting from outside instruction.It addition, set
It is upper and lower that fixed controlling curve can also arrange on the basis of the initial goal pressure controlling curve C to set in the step s 100
Limit value.
It addition, in above-mentioned controlling curve setting processes, by the rotating speed Nm of motor 3 and goal pressure PN in the same time
In the range of accumulative.But, the cumulative time of rotating speed Nm can cumulative time than goal pressure PN long or short.
It addition, rotating speed Nm employs the feedback signal from converter 20 but it also may use from control portion 40 to frequency conversion
The instruction rotating speed (rotating speed of target) of device 20.
Fig. 6 is the curve chart representing the example that goal pressure controlling curve is adapted to low-pressure side by control portion.
In the example shown in Fig. 6, control portion 40 only reduces rule by making PA and PB of current goal pressure controlling curve C with pressure
The mode (to low lift side) of definite value Δ P moves in parallel, and determines new goal pressure controlling curve C '.Thus, motor 3 (pump
2) relative to delivery flow QN with low rotating speed Nm ' operating.
Fig. 7 is the curve representing another example that goal pressure controlling curve is adapted to low-pressure side by control portion
Figure.In the example shown in Fig. 7, control portion 40 calculates, by deducting setting Δ P from PB, the PB ' made new advances.Further, at Fig. 7
Coordinate system in, by will be according to the specific point of delivery flow 0 and PB ' and the pressure PA according to maximum stream flow QMAX and correspondence
Specific point links with conic section, determines new pipe resistance curve R '.The result of such correction is, current target
Stress control curve C's is substantially overall to low lift side shifting (displacement).In this case, motor 3 (pump 2) is also relative to discharge
Flow QN is with low rotating speed Nm ' operating.Alternatively, it is also possible to deduct setting Δ P from PA and calculate by replacing PB and make new advances
PA ', determines new pipe resistance curve R '.
Only at the operation point of low output, drive motor 3 it is meant that adjust the probability height of the water yield according to line loss,
Even and if the rotating speed reducing pump 2 also be able to realize sufficiently the to supply water probability of action is high.Therefore, by by current target pressure
Power controlling curve C is adapted to low lift side and is capable of energy-saving operation.
In order to avoid the drastically variation of the discharge pressure of pump 2, preferably little by little cut from current goal pressure controlling curve C
Change to new goal pressure controlling curve C '.For example, it is possible to from current in the range of the passage time (such as 10 seconds) of regulation
Goal pressure controlling curve C is switched to new goal pressure controlling curve C ' lentamente, or can also be with the rate of change of regulation
New goal pressure controlling curve C ' it is switched to lentamente from current goal pressure controlling curve C.
When goal pressure controlling curve is adapted to high pressure side be identical when being adapted to low-pressure side.Namely
Saying, control portion 40 can make PA with PB parallel shifting in the way of only increasing setting Δ P of current goal pressure controlling curve C
Move and determine new goal pressure controlling curve C '.Alternatively, it is also possible to the side in PA and PB is determined plus setting Δ P
New goal pressure controlling curve C '.
Fig. 8 is the curve chart of an example of the time change representing discharge side pressure.In the example shown in Fig. 8,
Period from moment t1 to moment t2 calculates meansigma methods Mp of discharge side pressure Pm, owing to average pressure Mp is less than pressure threshold
Ps, so being adapted to low lift side by goal pressure controlling curve.Thus, the energy-saving of water supply installation 1 is sought.
Fig. 9 is the curve chart of another example of the time change of the goal pressure representing pump.At the example shown in Fig. 9
In, become near PA in period goal pressure PN from moment t3 to moment t4.Now, the rotating speed Nm of motor 3 becomes maximum turn
Near speed Nmax.Therefore, in the example shown in Fig. 9, at moment t4, goal pressure controlling curve is adapted to high-lift side.This
Time, if rotating speed Nm becomes NMAX, then goal pressure PN becomes PA '.Here, in the present embodiment, as it is shown in figure 9, by mesh
Mark Stress control curve amendment to high-lift side time, be adapted to low lift side with by goal pressure controlling curve compared with, revise
Greatly.Thereby, it is possible to suppress the insufficient water from water supply installation 1 more reliably.
As can be seen from figures 8 and 9, in the water supply installation 1 of present embodiment, operate pump 2 time, it is possible to automatically determine with
The corresponding most suitable goal pressure controlling curve of operational situation of pump 2.Thereby, it is possible to reduce the corresponding to pipe resistance of surplus
Boosting and seek the energy-saving of water supply installation 1, and the insufficient water from water supply installation 1 can be suppressed.
(the 2nd embodiment)
Figure 10 is the signal of the example representing the pump installation of an embodiment of the invention and Long-Range Surveillance Unit
Figure.The Long-Range Surveillance Unit 60 of present embodiment is communicated with water supply installation 1 by common line 90.Common line 90 is
Analog of telephone line road network, isdn line road network, optical networking, WLAN, PHS line network, cell phone lines net, the Internet etc. are arbitrary
Communication mode.Common line 90 can also be the combination in any of these multiple communication modes.Here, in the structure shown in Figure 10
Water supply installation 1 is in addition to the aspect that control portion 40 has communication unit 52 for communication with the outside, with the 1st shown in Fig. 3
The water supply installation 1 of embodiment is identical.Additionally, common line 90 is not limited to wired mode, it is also possible to be wireless mode.Separately
Outward, it is also possible to replace common line 90 or use special circuit water supply installation 1 and common line 90 connected on this basis.
As shown in Figure 10, Long-Range Surveillance Unit 60 has storage part 67, operational part 68, I/O portion 70, configuration part 66, display
Portion 69 and communication unit 72.Configuration part 66 and display part 69 are arranged on the operating panel 71 of Long-Range Surveillance Unit 60.Additionally, remotely
Each function of monitoring arrangement 60 can also be arranged in plural device dispersedly.
Long-Range Surveillance Unit 60 is configured to send director data from communication unit 72 to the control portion 40 of water supply installation 1.
The communication unit 52 in control portion 40 receives the order data from Long-Range Surveillance Unit 60, and by this order data from TCP/IP network
Data are converted into the data that operational part 48 is capable of identify that.Control portion 40 controls the operating of pump 2 in accordance with director data, or will be by
The operation information required sends to Long-Range Surveillance Unit 60.The data carried out to Long-Range Surveillance Unit 60 from control portion 40 send can
To carry out all the time, it is also possible to carry out every the period (the most several days etc.) of regulation, it is also possible to wanted from Long-Range Surveillance Unit 60
Carry out in the case of asking.
According to such structure, Long-Range Surveillance Unit 60 can obtain rotating speed Nm and the target pressure of the motor 3 of water supply installation 1
Power PN.Additionally, Long-Range Surveillance Unit 60 can also receive the data beyond rotating speed Nm and goal pressure PN from water supply installation 1.Example
As, Long-Range Surveillance Unit 60 can receive the current goal pressure controlling curve C of water supply installation 1, it is also possible to receives and is stored in
The various data of the setting values such as PA, the PB in storage part 47.And, Long-Range Surveillance Unit 60 can also receive water supply installation 1
Abnormal information.
It addition, Long-Range Surveillance Unit 60 can in order to obtain rotating speed Nm and goal pressure PN of the motor 3 of water supply installation 1,
And revise goal pressure controlling curve C based on the data got and send instruction to the control portion 40 of water supply installation 1.At this
In the case of, Long-Range Surveillance Unit 60 performs the controlling curve setting shown in Fig. 5 as escribed above and processes, and in order to revise target pressure
Power controlling curve C and to the control portion 40 of water supply installation 1 send instruction.It only can also be that the instruction carried out to control portion 40 sends
Send for instructing PA, PB being adapted to high-lift side or low lift side.It addition, Long-Range Surveillance Unit 60 can also determine newly
Goal pressure controlling curve C ' and goal pressure controlling curve C ' is sent to control portion 40.
According to present embodiment, it is possible to automatically determined and water supply installation by remotely operation by Long-Range Surveillance Unit 60
The corresponding most suitable goal pressure controlling curve of operational situation of 1.Especially obtain in remote field and monitor having had
In the case of the device of the operational situation etc. of water supply installation 1, by making this Long-Range Surveillance Unit 60 perform the such as control shown in Fig. 5
Curve setting processed processes, and existing equipment can be utilized to revise the goal pressure controlling curve of water supply installation 1.It addition,
In the case of Gai, by making the Long-Range Surveillance Unit 60 of the multiple water supply installation of supervision be modified the place of goal pressure controlling curve
Reason, and compared with the situation of the process making each water supply installation 1 existing be modified goal pressure controlling curve, it is possible to reduce
The object that importing processes.
It addition, as shown in Figure 10, Long-Range Surveillance Unit 60 also water supply installation 1A with other can communicate and be all together
Store multiple water supply installation 1, the data of 1A are managed.Thus, it is also possible to according to each region, time (in one day
Time-bands, season etc.), the structure of building (resident family's number, the number of plies, towards etc.) carry out the data with reference to water supply installation.Also be able to
The correction value equivalence of rotary speed threshold value Nr1, pressure threshold Ps, goal pressure controlling curve C is determined based on these data.
Additionally, in the present embodiment, in Long-Range Surveillance Unit 60 and water supply installation 1 communicates and receives motor 3
Rotating speed Nm and the communication unit 72 of goal pressure PN suitable with " rotating speed acceptance division " and " pressure acceptance division ".It addition, output based on
Rotating speed Nm and goal pressure PN revise operational part 68 of the instruction of goal pressure controlling curve C etc. and by the finger of operational part 68
Make the communication unit 72 sent to the control portion 40 of water supply installation 1 suitable with " revision directive sending part ".
(the 3rd embodiment)
Figure 11 is the showing of another example representing the pump installation of an embodiment of the invention and Long-Range Surveillance Unit
It is intended to.The structure of present embodiment does not have communication unit 52 except the control portion 40 replacing water supply installation 1 and arranges water supply installation 1
Beyond the aspect of the communicator 80 of the communications intermediary of Long-Range Surveillance Unit 60, identical with the structure shown in Figure 10.
Communicator 80 is arranged in the place identical with water supply installation 1, to water supply installation 1 and Long-Range Surveillance Unit 60
Communication carries out intermediary.Communicator 80 carries out signal transmission reception with the I/O portion 50 in control portion 40.Communicator 80 and I/O portion
50 are connected with each other by such as RS422,232C, the communications such as wired communication mode or infrared communication such as 485.
Communicator 80 has communication unit and protocol converter (not shown).The communication unit of communicator 80 is configured to fixed interval
(such as every 250ms) obtains operation information and the fault message of water supply installation 1 from control portion 40.The protocol conversion of communicator 80
Device is for being converted into TCP/IP network data by the various information (data) got from control portion 40.By this protocol conversion
Device, and carry out the data between Long-Range Surveillance Unit 60 and control portion 40 by common lines 90 such as NTT circuit or the Internets
Transmission receive.
In the present embodiment, it is also possible to automatically determined and the operational situation of water supply installation 1 by Long-Range Surveillance Unit 60
Corresponding most suitable goal pressure controlling curve, and the goal pressure control of water supply installation 1 is carried out via communicator 80
The correction of curve.I.e. it is capable of play the effect identical with the structure of the 2nd embodiment.Additionally, there are because of common line
The technological innovation of 90 and the situation communicating the change of the agreement etc. between device 80 and common line 90 of having to.In these feelings
Under condition, as long as by communicator 80 is separated with water supply installation 1, it is possible to do not stop only changing as the water supply of life line
Communicator 80.
This concludes the description of embodiments of the present invention, but the embodiment of above-mentioned invention is to make the present invention easy
Understand, do not limit the present invention.The present invention can carry out changing, improving without departing from this purport, and the most certain
Also its equipollent is comprised.It addition, at least some of scope that can solve the problem that above-mentioned technical task, or have effect
In at least one of scope, it is possible to carry out the combination in any of embodiment and variation, it is possible to carry out claims and say
The combination in any of each structural element described in bright book or omission.
Claims (7)
1. a pump installation, it is characterised in that have:
Pump, it transfers liquid；
Motor, it drives described pump；With
Control portion, it sets in the way of making the discharge side pressure of described pump become the goal pressure on goal pressure controlling curve
The rotating speed of described motor also controls this motor,
The meansigma methods ratio of the described control portion described goal pressure within the 1st stipulated time is on described goal pressure controlling curve
The pressure threshold hour of regulation is goal pressure controlling curve described in correction in the way of making the reduction of described goal pressure, on the 2nd rule
So that what described goal pressure increased time more than the rotary speed threshold value that the meansigma methods of rotating speed is regulation of interior described motor of fixing time
Goal pressure controlling curve described in mode correction.
2. pump installation as claimed in claim 1, it is characterised in that
The rotary speed threshold value of described regulation is the rated speed of described motor.
3. pump installation as claimed in claim 1, it is characterised in that
The pressure threshold of described regulation is the intermediate value of the goal pressure on described goal pressure controlling curve.
4. pump installation as claimed in claim 2, it is characterised in that
The pressure threshold of described regulation is the intermediate value of the goal pressure on described goal pressure controlling curve.
5. the pump installation as according to any one of Claims 1-4, it is characterised in that
Described control portion in the meansigma methods of described goal pressure than the pressure of the described regulation on described goal pressure controlling curve
Threshold value hour is goal pressure controlling curve described in correction in the way of making described goal pressure only reduce the 1st pressure, at described turn
So that described goal pressure only increases bigger than described 1st pressure the time more than the rotary speed threshold value that meansigma methods is described regulation of speed
Goal pressure controlling curve described in the mode correction of 2 pressure.
6. a Long-Range Surveillance Unit, communicates with pump installation, and wherein said pump installation has the pump of transfer liquid, drives institute
State the motor of pump and control in the way of making the discharge side pressure of described pump become the goal pressure on goal pressure controlling curve
The control portion of described motor, described Long-Range Surveillance Unit is characterised by having:
Rotating speed acceptance division, it receives the rotating speed of described motor；
Pressure acceptance division, it receives the goal pressure of described pump；With
Revision directive sending part, the meansigma methods of the described goal pressure of its reception within the 1st stipulated time is than described target pressure
The pressure threshold hour of the regulation on power controlling curve, by goal pressure described in correction in the way of making the reduction of described goal pressure
The instruction of controlling curve sends to described control portion, the meansigma methods of the rotating speed of the described motor of the reception within the 2nd stipulated time
For time more than the rotary speed threshold value of regulation, by goal pressure controlling curve described in correction in the way of making the increase of described goal pressure
Instruct and send to described control portion.
7. a control method for pump installation, wherein said pump installation has the pump of transfer liquid and drives the motor of described pump,
And control described motor, institute in the way of making the discharge side pressure of described pump become the goal pressure on goal pressure controlling curve
The control method stating pump installation is characterised by,
Obtain the rotating speed of described motor,
Obtain the goal pressure of described pump,
The meansigma methods of the described goal pressure got within the 1st stipulated time is than the rule on described goal pressure controlling curve
Fixed pressure threshold hour is goal pressure controlling curve described in correction in the way of making the reduction of described goal pressure, in the 2nd regulation
The meansigma methods of the described rotating speed got in the time be regulation rotary speed threshold value more than time so that described goal pressure increase
Goal pressure controlling curve described in mode correction.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2015100331A JP6469520B2 (en) | 2015-05-15 | 2015-05-15 | Pump device, remote control device, and control method of pump device |
| JP2015-100331 | 2015-05-15 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106150998A true CN106150998A (en) | 2016-11-23 |
| CN106150998B CN106150998B (en) | 2019-09-13 |
Family
ID=57353814
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610320258.9A Active CN106150998B (en) | 2015-05-15 | 2016-05-13 | The control method of pump installation, Long-Range Surveillance Unit and pump installation |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP6469520B2 (en) |
| CN (1) | CN106150998B (en) |
| MY (1) | MY185874A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110857687A (en) * | 2018-08-24 | 2020-03-03 | 恩格尔机械(上海)有限公司 | Method and device for monitoring the condition of a hydraulic pump |
| CN112012837A (en) * | 2020-09-04 | 2020-12-01 | 上海华兴数字科技有限公司 | Fire fighting truck water taking control method, main controller, system and electronic equipment |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6759392B2 (en) * | 2019-02-25 | 2020-09-23 | 株式会社川本製作所 | Water supply device |
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| JP2523139B2 (en) * | 1987-09-18 | 1996-08-07 | 株式会社日立製作所 | Water supply system using variable speed pump |
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| JP4317093B2 (en) * | 2004-07-26 | 2009-08-19 | 株式会社荏原製作所 | Fire pump device |
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| JP6184792B2 (en) * | 2013-07-26 | 2017-08-23 | 株式会社荏原製作所 | Water supply equipment |
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| JP2002268703A (en) * | 2001-03-08 | 2002-09-20 | Toshiba Corp | Supporting device for controlling terminal pressure |
| CN101556068A (en) * | 2008-04-11 | 2009-10-14 | 上海瀚艺冷冻机械有限公司 | Constant pressure frequency conversion energy-saving control method of recycle pump in central air-conditioning system |
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Also Published As
| Publication number | Publication date |
|---|---|
| JP6469520B2 (en) | 2019-02-13 |
| MY185874A (en) | 2021-06-14 |
| CN106150998B (en) | 2019-09-13 |
| JP2016217195A (en) | 2016-12-22 |
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