CN104375520B - A kind of device and method of automatic stabilisation water-carrying capacity - Google Patents
A kind of device and method of automatic stabilisation water-carrying capacity Download PDFInfo
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- CN104375520B CN104375520B CN201410638120.4A CN201410638120A CN104375520B CN 104375520 B CN104375520 B CN 104375520B CN 201410638120 A CN201410638120 A CN 201410638120A CN 104375520 B CN104375520 B CN 104375520B
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Abstract
The present invention provides a kind of device and method of automatic stabilisation water-carrying capacity, and it realizes that water is circulated in cyclic water tank loop；It is quick to be adjusted to flow to set in the range of the 90%~110% of flow；The PID modules of regulating valve are enabled, by adjusting its aperture, flow is adjusted；In variable frequency pump and the collective effect of regulating valve, the stable regulation of flow is realized；Flow is adjusted to after setting in the range of the 98%~102% of flow, and commutator is commutated to water tank location of weighing, the umber of pulse that frequency meter recording flowmeter is sent；After electronic scale weighing reaches rated weight, commutator gains cyclic water tank porch, and frequency meter stops counting.Using the device and method of the automatic stabilisation water of the present invention, calibration operation can be carried out under the flow status of high stable, the uncertainty of stability of flow degree is up to 0.04%, it is ensured that flowmeter works under same discharge coefficient, it is ensured that the metering performance of flowmeter.
Description
Technical field
The invention belongs to fluid flow or volume measurement technical field, and in particular to a kind of device of automatic stabilisation water-carrying capacity
And method.
Background technology
Flow measurement is that measuring science most wants part, is widely applied in each field.Meter proof is
The calibrating of constant flow points some to flowmeter, in flow measurement, it is necessary to assure the stabilization of flow height, whole device is in metering
During, flow must be controlled within the error range of permission, to ensure the reliability of verification result.
The method for stabilizing voltage of current water flow standard apparatus can substantially be divided into water tower voltage stabilizing method, pressurizing vessel method, frequency conversion voltage stabilizing
Method etc..
(1) water tower voltage stabilizing method, is that, using the high-order water tower of permanent liquid level as constant pressure water source, it can obtain good fluid stable
Property, but its ram pressures being provided with is limited, big water tower floor space and the shortcomings of expensive cost of erection.
(2) pressurizing vessel method, is that water and gas are incorporated into same container, and bottom is by water supplying pump, and top has compression empty
Gas is adjusted the pressure in container by gas, it is ensured that pressure stability in real time as gas source feed, when flow is smaller, and it, which has, throws
The features such as money is less, floor space is small.But when being examined and determine for big flow, container volume is very big, and the high-pressure bottle of large volume is present
Danger, and need to configure substantial amounts of compressed air, the time of device voltage stabilizing is also longer.
(3) frequency conversion voltage stabilizing method, is that, by changing the control frequency of variable frequency pump so as to realize the regulation to flow, it takes up an area face
Accumulate small, small investment, can select high-lift pump to improve ram pressures, but its discharge stability is not so good as the above two.
The content of the invention
A kind of floor space of offer of the invention is small, realize the high automatic steady of the control of the flow of high stability, automaticity
Determine the device and method of water-carrying capacity.
Realize the technical scheme of the object of the invention：A kind of device of automatic stabilisation water-carrying capacity, it includes cyclic water tank, circulation
Water tank side connects cyclic water tank water intaking valve by pipeline, and opposite side connects variable frequency pump by pipeline；Variable frequency pump is connected by pipeline
Vacuum tank is connect, vacuum tank connects the outlet pipe being arranged on above commutator by pipeline connection flow gauge, flowmeter by pipeline；
Frequency meter is set on flowmeter；
Set above cyclic water tank and water tank of weighing is placed on electronic scale, electronic scale, be cyclic water tank beside water tank of weighing
Entrance；Commutator is arranged on weigh water tank and cyclic water tank entrance top, and outlet pipe is arranged on above commutator, the outlet pipe one
Side carries optoelectronic switch；Commutator bottom is provided with delivery port, and position conversion is carried out by commutator so that the water of outlet pipe outflow
It only flows into cyclic water tank entrance or only flows into water tank of weighing.
A kind of device of automatic stabilisation water-carrying capacity as described above, it is provided with water tank side of weighing and connected with cyclic water tank
Discharge pipe line, set and weigh water tank drain valve on the discharge pipe line；Cyclic water tank liquid level gauge is provided with cyclic water tank；
The pipeline that cyclic water tank is connected with variable frequency pump is provided with pump intake valve；It is provided with and pumps out on the tank connected pipeline of variable frequency pump and voltage stabilizing
Mouth valve；Flowmeter inlet valve is provided with the pipeline that vacuum tank is connected with flowmeter；The pipeline being connected in flowmeter with outlet pipe
It is provided with regulating valve.
A kind of device of automatic stabilisation water-carrying capacity as described above, optoelectronic switch, water tank drain valve of weighing, electricity described in it
Sub- scale, pump intake valve, cyclic water tank water intaking valve, variable frequency pump, pump discharge valve, flowmeters inlet valve, frequency meter, flowmeter and
Regulating valve is field apparatus, and these field apparatus are connected by circuit with programmable logic controller (PLC) respectively, FPGA
Controller is interacted by EPA with human-computer interaction interface.
A kind of device of automatic stabilisation water-carrying capacity as described above, the human-computer interaction interface described in it is configured using two-shipper,
After one crashes, another still operable, and it is responsible for receiving the instruction that user's input and user send, and utilizes modbus/TCP
Communication protocol, is interacted through EPA with programmable logic controller (PLC), all logics in programmable logic controller (PLC),
It receives the signal of field apparatus, and controls field apparatus, and all kinds of state transfers of present equipment are carried out to human-computer interaction interface
Display.
A kind of device of automatic stabilisation water-carrying capacity as described above, the programmable logic controller (PLC) described in it passes through digital quantity
The start and stop of the switch, pump of card control field apparatus, i.e. valve, the position conversion of commutator；Pass through analog output card control frequency conversion
The frequency of pump and the aperture of regulating valve；What flowmeter was returned is pulse value, is acquired by frequency meter, and record accumulated pulse
Number is scaled integrated flow, and by timer interrupt mode, records the umber of pulse in 1s, be scaled instantaneous delivery.
A kind of method of automatic stabilisation water-carrying capacity of the present invention, it comprises the following steps：
(a) ON cycle tank intake valve of water, it is the 80%~90% of its full liquid level to make liquid level in cyclic water tank；Unlatching is pumped into
Mouth valve, variable frequency pump, pump discharge valve, the liquid level to vacuum tank are adjusted, it is ensured that liquid level is the 80% of its full liquid level in vacuum tank
~90%；Turn-on flow rate meter inlet valve, regulating valve, commutator, which is changed, is transformed into cyclic water tank porch, realizes water in cyclic water tank
Circulated in loop；
(b) using flowmeter flow as real-time traffic, the frequency of variable frequency pump is changed by pid algorithm, as shown in figure 3, soon
Flow is adjusted to set in the range of the 90%~110% of flow by speed；After flow is adjusted in the range of 90%~110%, enable
The PID modules of regulating valve, by adjusting its aperture, flow is adjusted；In variable frequency pump and the collective effect of regulating valve, realize
The stable regulation of flow；
(c) flow is adjusted to after setting in the range of the 98%~102% of flow, removes the peel electronic scale, and frequency meter is reset, will
Commutator is commutated to water tank location of weighing, and optoelectronic switch can be triggered during commutation, and programmable logic controller (PLC) receives light
During the first time pulse signal of electric switch, while the umber of pulse that frequency meter recording flowmeter is sent；
(d) after electronic scale weighing reaches rated weight, commutator gains cyclic water tank porch, now optoelectronic switch
Second of pulse signal is produced, frequency meter stops counting；
(e) the accumulated pulse number in reading frequency meter and time, the value of weighing of electronic scale is read；Unlatching is weighed tank drains
Valve, is closed after draining；
A kind of method of automatic stabilisation water-carrying capacity as described above, it comprises the following steps (f), i.e. (f) repeat step (b)
After 3 calibratings that same calibrating point is completed to step (e), the average discharge of a calibrating point is calculated.
A kind of method of automatic stabilisation water-carrying capacity as described above, it comprises the following steps (g), i.e. (g) repeat step (b)
To step (f), completed until the calibrating point of all inputs is all examined and determine, off-test.
Effect of the invention is that：Automatic stabilisation water flow device of the present invention realizes the flow control of high stability
System, is that high-precision meter proof lays good basis., can be high steady using the method for the automatic stabilisation water of the present invention
Calibration operation is carried out under fixed flow status, the uncertainty of stability of flow degree is up to 0.04%, it is ensured that flowmeter is same
Worked under discharge coefficient, it is ensured that the metering performance of flowmeter.The present invention realizes quick regulation, improves efficiency；Operating process is certainly
Dynamicization, in human-computer interaction interface, after input calibrating point, click starts, until cautious end, without human intervention, it is to avoid people
The error brought for operational error.
Brief description of the drawings
Fig. 1 is a kind of apparatus structure schematic diagram of automatic stabilisation water-carrying capacity of the present invention；
Fig. 2 is control system schematic diagram；
Fig. 3 is that PID adjusts schematic diagram；
In figure：1. optoelectronic switch；2. commutator；3. water tank of weighing；4. water tank drain valve of weighing；5. electronic scale；6. circulation
High water tank meter；7. pump intake valve；8. cyclic water tank；9. cyclic water tank water intaking valve；10. variable frequency pump；11. pump discharge valve；12. it is steady
Press tank；13. flowmeter inlet valve；14. frequency meter；15. flowmeter；16. regulating valve；17. outlet pipe；18. cyclic water tank entrance；
19. human-computer interaction interface；20. EPA；21. programmable logic controller (PLC).
Embodiment
Below in conjunction with the accompanying drawings with specific embodiment to a kind of device and method of automatic stabilisation water-carrying capacity of the present invention
It is further described.
Embodiment 1
As shown in figure 1, a kind of device of automatic stabilisation water-carrying capacity of the present invention, it includes cyclic water tank 8, recirculated water
The side of case 8 connects cyclic water tank water intaking valve 9 by pipeline, and opposite side connects variable frequency pump 10 by pipeline.Set on cyclic water tank 8
There is cyclic water tank liquid level gauge 6；Pump intake valve 7 is provided with the pipeline that cyclic water tank 8 is connected with variable frequency pump 10.
Variable frequency pump 10 connects vacuum tank 12 by pipeline, and vacuum tank 12 is led to by pipeline connection flow gauge 15, flowmeter 15
Cross the outlet pipe 17 that pipeline connection is arranged on the top of commutator 2；Frequency meter 14 is set on flowmeter 15.In variable frequency pump 10 and surely
The pipeline for pressing tank 12 to connect is provided with pump discharge valve 11；It is included on the pipeline that vacuum tank 12 is connected with flowmeter 15 provided with flow
Mouth valve 13；Regulating valve 16 is provided with the pipeline that flowmeter 15 is connected with outlet pipe 17.
Set in the top of cyclic water tank 8 and water tank 3 of weighing is placed on electronic scale 5, electronic scale 5, the side of water tank 3 of weighing is circulation
Tank entry 18；Commutator 2 is arranged on water tank 3 of weighing with the top of cyclic water tank entrance 18, and outlet pipe 17 is arranged on commutator 2
Side, the side of outlet pipe 17 carries optoelectronic switch 1；The bottom of commutator 2 is provided with delivery port, is changed by the position of commutator 2 so that
Outlet pipe 17 flow out water its only flow into cyclic water tank entrance 18 or only flow into water tank 3 of weighing.
The discharge pipe line connected with cyclic water tank 8 is provided with the side of water tank 3 of weighing, water of weighing is set on the discharge pipe line
Case draining valve 4.Described cyclic water tank 8 is more than 10 times of the internal capacity of water tank 3 of weighing as water source, internal capacity.
Above-mentioned optoelectronic switch 1, water tank drain valve 4 of weighing, electronic scale 5, pump intake valve 7, cyclic water tank water intaking valve 9, become
Frequency pump 10, pump discharge valve 11, flowmeters inlet valve 13, frequency meter 14, flowmeter 15 and regulating valve 16 are field apparatus,
These field apparatus are connected by circuit with programmable logic controller (PLC) 21 respectively, programmable logic controller (PLC) 21 by industry with
Too net 20 is interacted with human-computer interaction interface 19.
As shown in Fig. 2 described human-computer interaction interface 19 is configured using two-shipper, after one crashes, another is still operable,
The stability of raising system, it is responsible for receiving the instruction that user's input and user send, using modbus/TCP communication protocols,
Interacted through EPA 20 with programmable logic controller (PLC) 21, all logics in programmable logic controller (PLC) 21, its
The signal of field apparatus is received, and controls field apparatus, all kinds of state transfers of present equipment are carried out to human-computer interaction interface 19
Display.Described programmable logic controller (PLC) 21 by the start and stop of the switch, pump of digital quantity card control field apparatus, i.e. valve, change
Changed to the position of device 2；Pass through the aperture of the frequency and regulating valve 16 of analog output card control variable frequency pump 10；Flowmeter is returned
Be pulse value, be acquired by frequency meter 14, and record accumulated pulse number and be scaled integrated flow, and pass through Interruption
Umber of pulse in mode, record 1s, is scaled instantaneous delivery.
Embodiment 2
Using the method for the automatic stabilisation water-carrying capacity of the automatic stabilisation water flow device described in embodiment 1, it includes as follows
Step：
(a) ON cycle tank intake valve of water 9, it is the 80%~90% of its full liquid level to make liquid level in cyclic water tank 8；Open pump
Inlet valve 7, variable frequency pump 10, pump discharge valve 11, the liquid level to vacuum tank 12 are adjusted, it is ensured that liquid level is complete for its in vacuum tank 12
The 80%~90% of liquid level；Turn-on flow rate meter inlet valve 13, regulating valve 16, commutator change 2 and are transformed at cyclic water tank entrance 18,
Realize that water is circulated in cyclic water tank loop；
(b) using the flow of flowmeter 15 as real-time traffic, the frequency of variable frequency pump 10 is changed by pid algorithm, quickly will stream
Amount is adjusted to set in the range of the 90%~110% of flow；After flow is adjusted in the range of 90%~110%, regulating valve is enabled
16 PID modules, by adjusting its aperture, flow is adjusted；In variable frequency pump 10 and the collective effect of regulating valve 16, realize
The stable regulation of flow；
(c) flow is adjusted to after setting in the range of the 98%~102% of flow, removes the peel electronic scale 5, frequency meter 14 is clear
Zero, commutator 2 is commutated to the position of water tank 3 of weighing, optoelectronic switch 1, programmable logic controller (PLC) can be triggered during commutation
20 when receiving the first time pulse signal of optoelectronic switch 1, while the umber of pulse that the recording flowmeter 15 of frequency meter 14 is sent；
(d) after electronic scale 5 is weighed to up to rated weight, commutator 2 is gained at cyclic water tank entrance 18, now photoelectricity
Switch 1 produces second of pulse signal, and frequency meter 14 stops counting；
(e) the accumulated pulse number in reading frequency meter 14 and time, the value of weighing of electronic scale is read；Unlatching weigh water tank row
Water valve 4, is closed after draining；
(f) repeat step (b) is arrived after 3 calibratings that step (e) completes same calibrating point, is calculated one and is examined and determine point
Average discharge.
(g) repeat step (b) arrives step (f), is completed until the calibrating point of all inputs is all examined and determine, off-test.
The present invention is directed to the deficiency of existing method for stabilizing voltage, and a set of automatic flow is designed on the basis of frequency conversion voltage stabilizing method
Adjusting means closes PID loop control as a part for flow standard device using double, quick, stable regulating water flow, the party
Case realizes the automation of verification process all using automatically controlling.Using variable frequency pump, pid algorithm is used in the incipient stage, quickly
Regulation flow reach the 90%~110% of setting value, realize the quick regulation of flow.Using the automatically controlled regulation with feedback
Valve, when in the range of 90%~110% that flow reaches setting value, coordinates variable frequency pump to be finely adjusted flow, realizes the steady of flow
Set the tone section.Using cyclic water tank as water source, internal capacity is more than 10 times of water tank internal capacity of weighing, in verification process,
Water source page change does not surpass the 1/10 of its liquid level, and metastable pressure head can be provided for pump intake.It is using vacuum tank voltage stabilizing, one
Residual gas in pipeline is collected into vacuum tank, two be to play a part of buffering to the pulsating flow that variable frequency pump is produced.
Claims (5)
1. a kind of method of the automatic stabilisation water-carrying capacity of use automatic stabilisation water flow device, it is characterised in that adopted in this method
With the device of automatic stabilisation water-carrying capacity, the device includes cyclic water tank (8), and cyclic water tank (8) side is followed by pipeline connection
Ring tank intake valve of water (9), opposite side connects variable frequency pump (10) by pipeline；Variable frequency pump (10) connects vacuum tank by pipeline
(12), vacuum tank (12) is by pipeline connection flow gauge (15), and flowmeter (15) is arranged on commutator (2) by pipeline connection
The outlet pipe (17) of side；Frequency meter (14) is set on flowmeter (15)；Electronic scale (5), electricity are set above cyclic water tank (8)
Placed on sub- scale (5) beside water tank (3) of weighing, water tank of weighing (3) is cyclic water tank entrance (18)；Commutator (2) is arranged on title
Heavy-water tank (3) is arranged on above commutator (2) with cyclic water tank entrance (18) top, outlet pipe (17), the outlet pipe (17) one
Side carries optoelectronic switch (1)；Commutator (2) bottom is provided with delivery port, is changed by commutator (2) position so that outlet pipe
(17) outflow water its only flow into cyclic water tank entrance (18) or only flow into water tank of weighing (3)；Set in water tank of weighing (3) side
There is the discharge pipe line connected with cyclic water tank (8), water tank drain valve (4) of weighing is set on the discharge pipe line；In cyclic water tank
(8) it is provided with cyclic water tank liquid level gauge (6)；Pump intake valve is provided with the pipeline that cyclic water tank (8) is connected with variable frequency pump (10)
(7)；Pump discharge valve (11) is provided with the pipeline that variable frequency pump (10) is connected with vacuum tank (12)；In vacuum tank (12) and flowmeter
(15) pipeline of connection is provided with flowmeter inlet valve (13)；It is provided with the pipeline that flowmeter (15) is connected with outlet pipe (17)
Regulating valve (16)；
Described optoelectronic switch (1), water tank drain valve of weighing (4), electronic scale (5), pump intake valve (7), cyclic water tank water intaking valve
(9), variable frequency pump (10), pump discharge valve (11), flowmeter inlet valve (13), frequency meter (14), flowmeter (15) and regulating valve
(16) it is field apparatus, these field apparatus are connected by circuit with programmable logic controller (PLC) (21) respectively, it is programmable to patrol
Controller (21) is collected to interact with human-computer interaction interface (19) by EPA (20)；
Described human-computer interaction interface (19) is configured using two-shipper, and after one crashes, another still operable, and it, which is responsible for receiving, uses
The instruction that family is inputted and user sends, using modbus/TCP communication protocols, through EPA (20) and FPGA
Controller (21) is interacted, and all logics are in programmable logic controller (PLC) (21), and it receives the signal of field apparatus, and controls
Field apparatus processed, all kinds of state transfers of field apparatus are shown to human-computer interaction interface (19)；
This method comprises the following steps：
(a) ON cycle tank intake valve of water (9), it is the 80%~90% of its full liquid level to make cyclic water tank (8) interior liquid level；Open pump
Inlet valve (7), variable frequency pump (10), pump discharge valve (11), the liquid level to vacuum tank (12) are adjusted, it is ensured that in vacuum tank (12)
Liquid level is the 80%~90% of its full liquid level；Turn-on flow rate meter inlet valve (13), regulating valve (16), commutator (2), which is transformed into, to follow
Ring tank entry (18) place, realizes that water is circulated in cyclic water tank loop；
(b) using flowmeter (15) flow as real-time traffic, the frequency of variable frequency pump (10) is changed by pid algorithm, quickly will stream
Amount is adjusted to set in the range of the 90%~110% of flow；After flow is adjusted in the range of 90%~110%, regulating valve is enabled
(16) PID modules, by adjusting its aperture, flow is adjusted；In variable frequency pump (10) and the common work of regulating valve (16)
Under, the stable regulation of flow is realized；
(c) flow is adjusted to after setting in the range of the 98%~102% of flow, removes the peel electronic scale (5), and frequency meter (14) is clear
Zero, commutator (2) is commutated to water tank of weighing (3) position, optoelectronic switch (1), FPGA can be triggered during commutation
When controller (21) receives the first time pulse signal of optoelectronic switch (1), while frequency meter (14) recording flowmeter (15) is sent out
The umber of pulse gone out；
(d) after electronic scale (5) is weighed to up to rated weight, commutator (2) gains cyclic water tank entrance (18) place, this time
Electric switch (1) produces second of pulse signal, and frequency meter (14) stops counting；
(e) the accumulated pulse number in reading frequency meter (14) and time, the value of weighing of electronic scale is read；Unlatching is weighed tank drains
Valve (4), is closed after draining.
2. a kind of method of the automatic stabilisation water-carrying capacity of use automatic stabilisation water flow device according to claim 1, its
It is characterised by, this method comprises the following steps (f), i.e.,
(f) repeat step (b) is arrived after 3 calibratings that step (e) completes same calibrating point, is calculated one and is examined and determine being averaged for point
Flow.
3. a kind of method of the automatic stabilisation water-carrying capacity of use automatic stabilisation water flow device according to claim 2, its
It is characterised by, this method comprises the following steps (g), i.e.,
(g) repeat step (b) arrives step (f), is completed until the calibrating point of all inputs is all examined and determine, off-test.
4. a kind of method of the automatic stabilisation water-carrying capacity of use automatic stabilisation water flow device according to claim 1, its
It is characterised by, described cyclic water tank (8) is as water source, and internal capacity is more than 10 times of water tank (3) internal capacity of weighing.
5. a kind of method of the automatic stabilisation water-carrying capacity of use automatic stabilisation water flow device according to claim 1, its
It is characterised by, described programmable logic controller (PLC) (21) is opened by digital quantity card control field apparatus, the i.e. switch of valve, pump
Stop, the position of commutator (2) is changed；Pass through the frequency of analog output card control variable frequency pump (10) and opening for regulating valve (16)
Degree；What flowmeter was returned is pulse value, is acquired by frequency meter (14), and records accumulated pulse number and is scaled accumulative stream
Amount, and by timer interrupt mode, record the umber of pulse in 1s, be scaled instantaneous delivery.
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| CN201410638120.4A CN104375520B (en) | 2014-11-05 | 2014-11-05 | A kind of device and method of automatic stabilisation water-carrying capacity |
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| CN201410638120.4A CN104375520B (en) | 2014-11-05 | 2014-11-05 | A kind of device and method of automatic stabilisation water-carrying capacity |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104897253B (en) * | 2015-06-06 | 2017-08-11 | 安徽汉威电子有限公司 | A kind of weighing-appliance for liquid flow standard device |
| CN107861380A (en) * | 2017-11-07 | 2018-03-30 | 北京金控数据技术股份有限公司 | Flow control methods, device, equipment and storage medium in desalting process |
| CN108918384B (en) * | 2018-07-18 | 2022-04-26 | 重庆大学 | Rainwater infiltration soil column seepage erosion experimental device and soil-water separation experimental method |
| CN111307253B (en) * | 2019-10-14 | 2021-09-21 | 北京远东仪表有限公司 | Intelligent detection and control system and method for flow device commutator |
| CN116104751A (en) * | 2023-01-13 | 2023-05-12 | 绍兴淼汇能源科技有限公司 | High-precision testing device and testing method for flow rate of volumetric pump outlet |
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| CN104375520A (en) | 2015-02-25 |
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