CN107843315A - A kind of flowmeter verification device and its calibration method - Google Patents
A kind of flowmeter verification device and its calibration method Download PDFInfo
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- CN107843315A CN107843315A CN201711112164.3A CN201711112164A CN107843315A CN 107843315 A CN107843315 A CN 107843315A CN 201711112164 A CN201711112164 A CN 201711112164A CN 107843315 A CN107843315 A CN 107843315A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F25/00—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume
- G01F25/10—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume of flowmeters
- G01F25/14—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume of flowmeters using a weighing apparatus
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F25/00—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F25/00—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume
- G01F25/10—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume of flowmeters
- G01F25/11—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume of flowmeters using a seal ball or piston in a test loop
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- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Volume Flow (AREA)
Abstract
A kind of flowmeter verification device and its calibration method,Contain volume pipe I 31,Volume pipe II 29,It is arranged at volume pipe I,Working piston I in II,Ⅱ,With working piston I,II connected synchronous motor I,Ⅱ,The photoelectric sensor I being installed in volume pipe I,Ⅱ,The fluid reservoir 25 being connected with volume pipe II,Quantity collecting unit 40,The parts such as computer,Tested flowmeter is installed on volume pipe I,II both ends,Injection passes through flowmeter liquid identical liquid with actual in product pipe I,Synchronous motor I,II drives working piston I,II work,Trigger photoelectric sensor I,Ⅱ,Read the time that liquid flows through tested flowmeter,Then liquid is discharged into fluid reservoir to the volume that tested flowmeter liquid is flowed through with measurement,Calculate the normal flow for flowing through tested flowmeter,According to the tested flowmeter readout of reading,Calculate the error of indication,According to error size,Judge whether flowmeter is qualified.Present invention measurement is convenient, data are accurate.
Description
Technical field
The present invention designs a kind of flowmeter verification device and its calibration method.
Background technology
Liquid capacity formula flowmeter in-situ calibrating common method is volumetric method（Container Open architecture）；Mass flowmenter is examined
It is volumetric method and mass method to determine common method.1st, volumetric method is to use standard meter measuring tank, measures the liquid volume by flowmeter
The time of value and liquid flow excessively stream gauge is so as to drawing flow value；2nd, mass method needs to support the use with densitometer, and uses mark
Quasi- densitometer measures the time for flowing through flowmeter Media density value and liquid flow excessively stream gauge, is measured indirectly further according to density formula
Flowmeter medium volume is flowed through, so as to draw flow value.
In the calibrating of existing flowmeter volumetric method, liquid volume V first in bioassay standard measuring tank, then use mercurial thermometer
Or digital display thermometer measurement temperature, because fluid temperature and pot temperature, environment temperature are inconsistent, temperature meeting in measurement process
It is slowly varying and to use standard metal vessel as dimension criteria device, it is necessary to continuous temperature adjustmemt, because of the factor such as expand with heat and contract with cold
Measurement error influenced by ambient temperature is big.
In being examined and determine using mass method flowmeter, since it is desired that densitometer, and densitometer in actual measurement process because by temperature
Degree change, environmental change and densitometer class of accuracy factor cause measurement density inaccuracy error big, and densitometer can only
Single-point sampling and measuring, each density measure numerical value is different in actual use, and existing method measuring process is numerous
Trivial, introducing uncertain factor source is more, and liquid volatile, influences actual flow meter measurement effect in addition.
Two kinds of current meter proof methods are required to consider temperature corrected value in actually measuring.
The content of the invention
It is insufficient present in currently available technology it is an object of the invention to overcome, there is provided a kind of new meter proof dress
Put and the calibration method using the device, flowmeter is examined and determine using this method, it is not necessary to standard metal device, do not need any temperature
Amendment, whole process sealed environment during measurement, and simulate actual flow meter and use process piping pressure, measurement data is accurate, whole process
Automatic Verification, it is easy to use.
Technical scheme is used by realize the above-mentioned purpose of the present invention：A kind of flowmeter verification device, its structure are special
Point is to contain volume pipe I, volume pipe II, working piston I, working piston II, synchronous motor I, synchronous motor II, pressure sensor
Ith, pressure sensor II, photoelectric sensor I, photoelectric sensor II, discharge solenoid valve, horizon sensor, fluid reservoir, air electromagnetism
Valve, air compressor, buoyancy limiter, removable motor, drag load sensor, weighing sensor, standard metal spheroid, number
According to collecting unit, distributed I/O module, computer, serial port board, printer, wherein, described volume pipe I, volume pipe II and quilt
It is identical to examine flowmeter caliber size, is respectively equipped with flange I, flange II at the both ends of volume pipe I, volume pipe II, working piston I and
Working piston II is respectively arranged at volume pipe I, in volume pipe II, and synchronous motor I, synchronous motor II pass through connecting rod I and even respectively
Bar II is connected with working piston I, working piston II, ensures that working piston I, working piston II are run simultaneously, pressure sensor I,
Photoelectric sensor I, photoelectric sensor II are arranged on the outer wall of volume pipe I, and liquid filling hole is additionally provided with the outer wall of volume pipe I,
Outage is provided with volume pipe II, outage is connected by liquid discharge pipe with discharge solenoid valve, discharge solenoid valve and liquid storage
Tank is connected, and pressure sensor II is arranged at the top of fluid reservoir, and fluid reservoir top is provided with passage, and passage passes through air hose and sky
Pneumoelectric magnet valve is connected, and air solenoid valve is then connected by air hose with air compressor, and buoyancy limiter is arranged in fluid reservoir,
Liquid storage pot bottom is provided with several weighing sensors, and horizon sensor is arranged at fluid reservoir side, and being provided with motor in fluid reservoir slides
Road, removable motor moving up and down is set in motor slideway, may move motor by connecting rod III and drag load sensor,
Buoyancy limiter is connected, and drag load sensor is connected by fine rule with standard ball；
Data acquisition unit respectively with pressure sensor I, pressure sensor II, photoelectric sensor I, photoelectric sensor II, horizontal
Sensor, drag load sensor, weighing sensor, serial port board are connected, for gather pressure sensor I, pressure sensor II,
Photoelectric sensor I, photoelectric sensor II, horizon sensor, drag load sensor, load cell signal；
Distributed I/O module respectively with synchronous motor I, synchronous motor II, discharge solenoid valve, air solenoid valve, buoyancy limiter,
Removable motor, air compressor, serial port board are connected, for exporting synchronous motor I, synchronous motor II, discharge solenoid valve, air
Magnetic valve, buoyancy limiter, removable motor, air compressor signal；
Computer is connected with serial port board and printer, for field print data.
Photoelectric sensor I of the present invention, photoelectric sensor II, drag load sensor, weighing sensor it is accurate
Degree grade is preferably up to 0.01%.
It is a kind of that the method for flowmeter is examined and determine using above-mentioned flowmeter verification device, it is characterized in that following these steps what is carried out：
（1）Tested flowmeter is respectively arranged in the both ends of volume pipe I, volume pipe II by flange I, flange II；
（2）In liquid filling hole injection with actual by flowmeter liquid identical liquid, and close liquid filling hole；
（3）Volume pipe I, volume pipe II and tested flowmeter are adjusted to horizontality；
（4）Volume pipe I and working piston I in volume pipe II, the position of working piston II are adjusted, the work in volume pipe II is lived
Plug II approaches tested flowmeter；
（5）The position of working piston I is adjusted, makes the fluid pressure in volume pipe I constant, reaches and be consistent with actual pipeline pressure；
（6）Tested flow meter data is reset；
（7）The time signal of photoelectric sensor I is reset, the position signalling of photoelectric sensor II is reset；
（8）By computer starting synchronous motor I, synchronous motor II, while trigger photoelectric sensor I and start timing, keeping body
Fluid pressure is constant in product pipe I, when mobile working piston I is to when approaching tested flowmeter, triggers photoelectric sensor II, photoelectric transfer
The timing of sensor I terminates, and reads I time of photoelectric sensor t from data acquisition unit, time t is that liquid flows through under constant pressure
The time of tested flowmeter；
（9）Read tested flowmeter instrument indication value Q1
（10）Discharge solenoid valve is opened, the liquid that tested flowmeter is reached in volume pipe II will be flowed through and drained into fluid reservoir, pass
Close discharge solenoid valve and cut off the connection of liquid discharge pipe；
（11）The volume of tested flowmeter liquid is flowed through in measurement in fluid reservoir, and measuring method is as follows：
1. adjustment is arranged on the horizon sensor on fluid reservoir, fluid reservoir is in horizontality, liquid storage pot bottom is weighed biography
Sensor reading is reset, and liquid in volume pipe II is emitted into fluid reservoir, after the weighing sensor numerical stability of liquid storage pot bottom,
Its weight amount M is read in data acquisition unit, the numerical value is fluid to be measured actual weight in fluid reservoir；
2. by fine rule sprung mass it is M1 on the drag load sensor in fluid reservoir, the solid standard metal that volume is V1
Ball, the upper-lower position of drag load sensor is adjusted by fluid reservoir internal buoyancy limiter, solid standard metal ball is soaked completely
It is less than in the liquid in fluid reservoir, adjusts liquid storage pressure inside the tank using the air solenoid valve on fluid reservoir, be allowed to and body
The pressure of product pipe I is identical, and after drag load sensor stabilization, the pulling force of drag load sensor is read from data acquisition unit
Indicating value T；
3. measured according to the mass M 1 of solid standard metal ball, the volume V1 of solid standard metal ball, drag load sensor
The actual weight M of fluid to be measured in pulling force indicating value T, tank body, fluid to be measured volume in tank body is calculated using formula；
4. according to the fluid to be measured volume of step 3. middle calculating, drag load sensor is utilized to measure solid standard metal ball gravity
With the relation of buoyancy, fluid density is measured indirectly, and data acquisition unit converses tested stream according to fluid density and liquid quality
The volume of gauge liquid：
If the quality of solid standard metal ball is M1, volume V1, it is suspended under drag load sensor, and submerged
Enter in testing liquid, then have：
M1 g – ρV1g = T ①
In formula, ρ is testing liquid density, and g is acceleration of gravity, and T is the pulling force indicating value that drag load sensor measures
Then fluid density is in tank body：
ρ=（ M 1 g –T）/ V1 g ②
Fluid to be measured volume is in fluid reservoir:
V=M/ ρ=M/﹝（ M 1 g –T）/ V1 g ﹞ are 3.
The normal flow for then flowing through tested flowmeter is Q2 = V/t ；According to the tested flowmeter readout Q of reading1 , calculate
Go out indicating value error delta=Q1 - Q2
According to the size of error delta, judge whether tested flowmeter is qualified.
The invention has the advantages that：
1st, accredited flowmeter liquid volume is flowed through using weight method measurement, no matter how temperature changes, and fluid to be measured weight is not
It can change, verification result is not affected by temperature, without considering the correction value of any temperature.
2nd, due to the calibration method using weight method, therefore standard metal vessel are not needed, also will not be unexpected because of tank body
Deform and influence verification result, need not more consider tank body because tank body volume caused by thermal expansion varies with temperature, it is not necessary to appoint
What temperature adjustmemt.
3rd, due to no level readings device of the prior art, sight and liquid level being avoided unhorizontal etc., factor produces reading
Number error or the measurement error for avoiding electronic level measurement device from introducing.
4th, the solid standard metal ball being connected on drag load sensor uses stainless steel spheroid, and difficulty of processing is low, structure
Make simply, weight, volume can accurately measure, the stainless steel spheroid that can be also equipped with different weight according to being actually needed.
5th, fluid reservoir is closed, and fluid to be measured volatilization will not have an impact to volume measurements.
6th, verification process it is more accurate can to examine and determine data with analog stream gauge pipeline pressure.
7th, verification process is using data acquisition unit, computer, serial port board, distributed I/O module, whole-course automation data
Processing.
8th, error influence factor of the present invention is few, and gravitational load sensor used, drag load sensor can reach
0.01% class of accuracy, the weight of solid metal spheroid is same with cubing can to reach 0.01%, and time measurement is reachable
To 0.01% class of accuracy, therefore the degree of accuracy of verification result also can reach 0.01%, so the present invention can not only fully meet inspection
Provisioning request, and actual measuring system is stable, the degree of accuracy is higher.
Brief description of the drawings
Fig. 1 is the structural representation of the embodiment of the present invention；
Fig. 2 is Fig. 1 use state figure.
Fig. 3 is verification system schematic diagram.
Embodiment
To describe the present invention in detail, further detailed description is done to the present invention with reference to the example of specific implementation, so
And described embodiment should not be construed in a limited manner.
As can be seen that the flowmeter verification device of the present invention contains volume pipe I 31, volume pipe II 29, work from Fig. 1, Fig. 3
Make piston I 3, working piston II 8, synchronous motor I 1, synchronous motor II 10, pressure sensor I 5, pressure sensor II 11, photoelectricity
Sensor I 32, photoelectric sensor II 30, discharge solenoid valve 27, horizon sensor 21, fluid reservoir 25, air solenoid valve 14, air
Compressor 13, buoyancy limiter 22, removable motor 23, drag load sensor 17, weighing sensor 20, standard metal spheroid
19th, data acquisition unit 40, distributed I/O module 39, computer 36, serial port board 37, printer 38, wherein, described volume pipe
I 31, volume pipe II 29 is identical with the tested caliber size of flowmeter 35, is respectively equipped with the both ends of volume pipe I 31, volume pipe II 29
Flange I 6, flange II 7, working piston I 3 and working piston II 8 are respectively arranged at volume pipe I 31, in volume pipe II 29, synchronous electricity
Machine I 1, synchronous motor II 10 are connected by connecting rod I 2 and connecting rod II 9 with working piston I 3, working piston II 8 respectively, ensure work
Piston I 3, working piston II 8 are run simultaneously, and pressure sensor I 5, photoelectric sensor I 32, photoelectric sensor II 30 are arranged at body
On the outer wall of product pipe I 31, liquid filling hole 4 is additionally provided with the outer wall of volume pipe I 31, outage 28 is provided with volume pipe II 29,
Outage 28 is connected by liquid discharge pipe 26 with discharge solenoid valve 27, and discharge solenoid valve 27 passes through liquid discharge pipe 26 and liquid storage
Tank 25 is connected, and pressure sensor II 11 is arranged at the top of fluid reservoir 25, and the top of fluid reservoir 25 is provided with passage 33, and passage 33 is logical
Cross air hose 12 with air solenoid valve 14 to be connected, air solenoid valve 14 is then connected by air hose 12 with air compressor 13, is floated
Power limiter 22 is arranged in fluid reservoir 25, and the bottom of fluid reservoir 25 is provided with several weighing sensors 20, and horizon sensor 21 is set
The side of fluid reservoir 25 is placed in, motor slideway 24 is provided with fluid reservoir 25, is set in motor slideway 24 moving up and down removable
Motor 23, removable motor 23 are connected by connecting rod III 16 with drag load sensor 17, buoyancy limiter 22, and drag load passes
Sensor 17 is connected by fine rule 18 with standard ball 19.
Data acquisition unit 40 respectively with pressure sensor I 5, pressure sensor II 11, photoelectric sensor I 32, photoelectric transfer
Sensor II 30, horizon sensor 21, drag load sensor 17, weighing sensor 20, serial port board 37 are connected, for gathering pressure
Sensor I 5, pressure sensor II 11, photoelectric sensor I 32, photoelectric sensor II 30, horizon sensor 21, drag load pass
Sensor 17, the signal of weighing sensor 20.
Distributed I/O module 39 respectively with synchronous motor I 1, synchronous motor II 10, discharge solenoid valve 27, air solenoid valve
14th, buoyancy limiter 22, removable motor 23, air compressor 13, serial port board 37 are connected, for exporting synchronous motor I 1, same
Step motor II 10, discharge solenoid valve 27, air solenoid valve 14, buoyancy limiter 22, removable motor 23, air compressor 13 are believed
Number.
Computer 36 is connected with serial port board 37 and printer 38, for field print data.
Photoelectric sensor I 32 of the present invention, photoelectric sensor II 30, drag load sensor 17, weighing sensor
20 degree of accuracy is preferably up to 0.01%.
Fig. 2 gives the structural representation of use state of the present invention.Stream is examined and determine using the flowmeter verification device of the present invention
The method of gauge, follow these steps to carry out：
（1）Tested flowmeter 35 is respectively arranged in the both ends of volume pipe I 31, volume pipe II 29 by flange I 6, flange II 7；
（2）In the injection of liquid filling hole 4 with actual by flowmeter liquid identical liquid 34, and close liquid filling hole 4；
（3）Volume pipe I 31, volume pipe II 29 and tested flowmeter 35 are adjusted to horizontality；
（4）Volume pipe I 31 and working piston I 3 in volume pipe II 29, the position of working piston II 8 are adjusted, is made in volume pipe II 29
Working piston II 8 approach tested flowmeter 35；
（5）The position of working piston I 3 is adjusted, makes the fluid pressure in volume pipe I 31 constant, reaches and be consistent with actual pipeline pressure；
（6）By the tested zeros data of flowmeter 35；
（7）The time signal of photoelectric sensor I 32 is reset, the position signalling of photoelectric sensor II 30 is reset；
（8）By computer starting synchronous motor I 1, synchronous motor II 10, while trigger photoelectric sensor I 32 and start timing, protect
It is constant to hold fluid pressure in volume pipe I 31, when mobile working piston I 3 is to when approaching tested flowmeter, triggers photoelectric sensor II
30, the timing of photoelectric sensor I 32 terminates, and data acquisition unit 40 records I 32 time of photoelectric sensor t, and time t is constant pressure
Under power, liquid flows through the time of tested flowmeter；
（9）Read tested flowmeter instrument indication value Q1
（10）By computer opening discharge solenoid valve 27, the liquid that tested flowmeter 35 is reached in volume pipe II 29 will be flowed through and discharged
Enter in fluid reservoir 25, close discharge solenoid valve 27 and cut off the connection of liquid discharge pipe 26；
（11）The volume of tested flowmeter liquid is flowed through in measurement in fluid reservoir, and measuring method is as follows：
1. adjustment is arranged on the horizon sensor 21 on fluid reservoir 25, fluid reservoir 25 is set to be in horizontality, by the bottom of fluid reservoir 25
The reading of portion's weighing sensor 20 is reset, and liquid in volume pipe II 29 is emitted into fluid reservoir 25, treats weighing for the bottom of fluid reservoir 25
After the numerical stability of sensor 20, its weight amount M is read in data acquisition unit 40, the numerical value is fluid to be measured in fluid reservoir 25
Actual weight；
2. by the sprung mass of fine rule 18 is M1, volume is V1 solid mark on the drag load sensor 17 in fluid reservoir 25
Metalloid ball 19, the upper-lower position of drag load sensor 17 is adjusted by the buoyancy limiter 22 in fluid reservoir 25, will be solid
Standard metal ball 19 is totally submerged in the liquid in fluid reservoir 25, is adjusted using the air solenoid valve 14 on fluid reservoir 25
Pressure in whole fluid reservoir 25, it is allowed to identical with the pressure of volume pipe I 31, after drag load sensor 17 is stable, is adopted from data
Collect the pulling force indicating value T that unit 40 reads drag load sensor 17；
3. according to the mass M 1 of solid standard metal ball 19, the volume V1 of solid standard metal ball 19, drag load sensor 17
The actual weight M of fluid to be measured, test solution in fluid reservoir 25 is calculated using formula in the pulling force indicating value T that measures, fluid reservoir 25
Body volume；
4. according to the fluid to be measured volume of step 3. middle calculating, solid standard metal ball 19 is measured using drag load sensor 17
The relation of gravity and buoyancy, measures fluid density indirectly, and data acquisition unit 40 converses according to fluid density and liquid quality
The volume of tested flowmeter liquid：
If the quality of solid standard metal ball 19 is M1, volume V1, be suspended under drag load sensor 17, and by its
It is submerged into testing liquid, then has：
M1 g – ρV1g = T ①
In formula, ρ is testing liquid density, and g is acceleration of gravity, and T is the pulling force indicating value that drag load sensor measures
Then fluid density is in fluid reservoir 25：
ρ=（ M 1 g –T）/ V1 g ②
Fluid to be measured volume is in fluid reservoir:
V=M/ ρ=M/﹝（ M 1 g –T）/ V1 g ﹞ are 3.
The normal flow for then flowing through tested flowmeter is Q2 = V/t ；According to tested flowmeter instrument indication value Q1, calculate indicating value
Error delta=Q1 - Q2
According to error delta size, judge whether flowmeter is qualified.
The present invention flows through the accredited flowmeter liquid time according to the record of photoelectric sensor I, is flowed through using weight method measurement
Tested flowmeter liquid volume, it is not necessary to which any temperature amendment, stabilization of equipment performance is good, and whole process sealed environment during measurement, liquid is not
Volatilization ensures that measurement is accurate.
The quality of described solid standard metal ball is that M1 can be measured with drag load sensor 17.
Working piston I of the present invention, working piston II, synchronous motor I, synchronous motor II, pressure sensor I, pressure
Force snesor II, photoelectric sensor I, photoelectric sensor II, horizon sensor, fluid reservoir, discharge solenoid valve, air solenoid valve,
Buoyancy limiter, drag load sensor, weighing sensor, standard metal spheroid, data acquisition unit, distributed I/O module,
Computer, serial port board, printer are all the part that in the market is directly bought, and specifically used method and connection method are also this area
The general knowledge of technical staff, the control system in the computer are also the general knowledge of those skilled in the art, can be commercially direct
Buy, no longer repeat here.
Claims (3)
- A kind of 1. flowmeter verification device, it is characterized in that containing volume pipe I（31）, volume pipe II（29）, working piston I（3）, work Make piston II（8）, synchronous motor I（1）, synchronous motor II（10）, pressure sensor I（5）, pressure sensor II（11）, photoelectricity Sensor I（32）, photoelectric sensor II（30）, discharge solenoid valve（27）, horizon sensor（21）, fluid reservoir（25）, air electricity Magnet valve（14）, air compressor（13）, buoyancy limiter（22）, removable motor（23）, drag load sensor（17）, weigh Sensor（20）, standard metal spheroid（19）, data acquisition unit（40）, distributed I/O module（39）, computer（36）, serial ports Card（37）, printer（38）, wherein, described volume pipe I（31）, volume pipe II（29）With tested flowmeter caliber size phase Together, in volume pipe I（31）, volume pipe II（29）Both ends be respectively equipped with flange I（6）, flange II（7）, working piston I（3）And Working piston II（8）It is respectively arranged at volume pipe I（31）, volume pipe II（29）It is interior, synchronous motor I（1）, synchronous motor II（10） Pass through connecting rod I respectively（2）And connecting rod II（9）With working piston I（3）, working piston II（8）It is connected, ensures working piston I（3）、 Working piston II（8）Synchronous operation, pressure sensor I（5）, photoelectric sensor I（32）, photoelectric sensor II（30）It is arranged at body Product pipe I（31）Outer wall on, in volume pipe I（31）Outer wall on be additionally provided with liquid filling hole（4）, in volume pipe II（29）The row of being provided with Fluid apertures（28）, outage（28）Pass through liquid discharge pipe（26）With discharge solenoid valve（27）It is connected, discharge solenoid valve（27）With storage Flow container（25）It is connected, pressure sensor II（11）It is arranged at fluid reservoir（25）Top, fluid reservoir（25）Top is provided with passage （33）, passage（33）Pass through air hose（12）With air solenoid valve（14）It is connected, air solenoid valve（14）Then pass through air hose （12）With air compressor（13）It is connected, buoyancy limiter（22）It is arranged at fluid reservoir（25）It is interior, fluid reservoir（25）Bottom is provided with Several weighing sensors（20）, horizon sensor（21）It is arranged at fluid reservoir（25）Side, fluid reservoir（25）It is interior to be provided with motor Slideway（24）, motor slideway（24）It is interior that removable motor moving up and down is set（23）, may move motor（23）Pass through connecting rod Ⅲ（16）With drag load sensor）17）, buoyancy limiter（22）It is connected, drag load sensor（17）Pass through fine rule（18） With standard ball（19）It is connected；Data acquisition unit（40）Respectively with pressure sensor I（5）, pressure sensor II（11）, photoelectric sensor I（32）, light Electric transducer II（30）, horizon sensor（21）, drag load sensor（17）, weighing sensor（20）, serial port board（37）Phase Even, for gathering pressure sensor I（5）, pressure sensor II（11）, photoelectric sensor I（32）, photoelectric sensor II（30）、 Horizon sensor（21）, drag load sensor（17）, weighing sensor（20）Signal；Distributed I/O module（39）Respectively with synchronous motor I（1）, synchronous motor II（10）, discharge solenoid valve（27）, air electromagnetism Valve（14）, buoyancy limiter（22）, removable motor（23）, air compressor（13）, serial port board（37）It is connected, it is same for exporting Walk motor I（1）, synchronous motor II（10）, discharge solenoid valve（27）, air solenoid valve（14）, buoyancy limiter（22）, it is removable Motor（23）, air compressor（13）Signal；Computer（36）With serial port board（37）And printer（38）It is connected, for field print data.
- 2. the flowmeter verification device described in 1 is required according to power, it is characterized in that described photoelectric sensor I（32）, photoelectric sensing Device II（30）, drag load sensor（17）, weighing sensor（20）The degree of accuracy be preferably up to 0.01%.
- 3. a kind of method that flowmeter verification device using described in claim 1 examines and determine flowmeter, it is characterized in that pressing following step Suddenly carry out：（1）Pass through flange I（6）, flange II（7）By tested flowmeter（35）It is respectively arranged in volume pipe I（31）, volume pipe II （29）Both ends；（2）In liquid filling hole（4）Injection passes through flowmeter liquid identical liquid with actual（34）, and close liquid filling hole（4）；（3）Adjust volume pipe I（31）, volume pipe II（29）And tested flowmeter（35）To horizontality；（4）Adjust volume pipe I（31）And volume pipe II（29）Interior working piston I（3）, working piston II（8）Position, make volume Pipe II（29）Interior working piston II（8）Approach tested flowmeter（35）；（5）Adjust working piston I（3）Position, make volume pipe I（31）Interior fluid pressure is constant, reaches and actual pipeline pressure It is consistent；（6）By tested flowmeter（35）Zeros data；（7）By photoelectric sensor I（32）Time signal reset, photoelectric sensor II（30）Position signalling reset；（8）Pass through computer starting synchronous motor I（1）, synchronous motor II（10）, while trigger photoelectric sensor I（32）Start Timing, keep volume pipe I（31）Interior fluid pressure is constant, when mobile working piston I（3）To when approaching tested flowmeter, trigger Photoelectric sensor II（30）, photoelectric sensor I（32）Timing terminates, from data acquisition unit（40）Read photoelectric sensor I （32）Time t, time t are that liquid flows through the time of tested flowmeter under constant pressure；（9）Read tested flowmeter instrument indication value Q1（10）Discharge solenoid valve is opened by computer（27）, tested flowmeter will be flowed through（35）Reach volume pipe II（29）Interior liquid Body drains into fluid reservoir（25）It is interior, close discharge solenoid valve（27）And cut off liquid discharge pipe（26）Connection；（11）The volume of tested flowmeter liquid is flowed through in measurement in fluid reservoir, and measuring method is as follows：1. adjustment is arranged on fluid reservoir（25）On horizon sensor（21）, make fluid reservoir（25）In horizontality, by liquid storage Tank（25）Bottom weighing sensor（20）Reading is reset, by volume pipe II（29）Interior liquid is emitted into fluid reservoir（25）, treat liquid storage Tank（25）The weighing sensor of bottom（20）After numerical stability, in data acquisition unit（40）Read its weight amount M, the numerical value It is fluid reservoir（25）The actual weight of interior fluid to be measured；2. in fluid reservoir（25）Interior drag load sensor（17）On pass through fine rule（18）Sprung mass is M1, volume is V1's Solid standard metal ball（19）, pass through fluid reservoir（25）Interior buoyancy limiter（22）Adjust drag load sensor（17）It is upper Lower position, by solid standard metal ball（19）It is totally submerged fluid reservoir（25）In interior liquid, using installed in fluid reservoir （25）On air solenoid valve（14）Adjust fluid reservoir（25）Interior pressure, it is allowed to and volume pipe I（31）Pressure it is identical, treat pulling force Load transducer（17）After stable, from data acquisition unit（40）Read drag load sensor（17）Pulling force indicating value T；3. according to solid standard metal ball（19）Mass M 1, solid standard metal ball（19）Volume V1, drag load sensing Device（17）Pulling force indicating value T, the fluid reservoir measured（25）The actual weight M of interior fluid to be measured, fluid reservoir is calculated using formula （25）Interior fluid to be measured volume；4. according to the fluid to be measured volume of step 3. middle calculating, drag load sensor is utilized（17）Measure solid standard metal ball （19）The relation of gravity and buoyancy, fluid density, data acquisition unit are measured indirectly（40）According to fluid density and liquid quality Converse the volume of tested flowmeter liquid：If solid standard metal ball（19）Quality be M1, volume V1, be suspended on drag load sensor（17）Under, and It is submerged into testing liquid, then is had：M1 g – ρV1g = T ①In formula, ρ is testing liquid density, and g is acceleration of gravity, and T is the pulling force indicating value that drag load sensor measuresThen fluid density is in fluid reservoir 25：ρ=（ M 1 g –T）/ V1 g ②Fluid to be measured volume is in fluid reservoir:V=M/ ρ=M/﹝（ M 1 g –T）/ V1 g ﹞ are 3.The normal flow for then flowing through tested flowmeter is Q2 = V/t ；According to the tested flowmeter readout Q of reading1, calculate Go out indicating value error delta=Q1 - Q2According to error delta size, judge whether flowmeter is qualified.
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