CN109387265A - Low temperature mass flowmenter performance testing device and method - Google Patents
Low temperature mass flowmenter performance testing device and method Download PDFInfo
- Publication number
- CN109387265A CN109387265A CN201710674551.XA CN201710674551A CN109387265A CN 109387265 A CN109387265 A CN 109387265A CN 201710674551 A CN201710674551 A CN 201710674551A CN 109387265 A CN109387265 A CN 109387265A
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- mass flowmenter
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- 238000000034 method Methods 0.000 title claims abstract description 47
- 238000012360 testing method Methods 0.000 title claims abstract description 30
- 239000007788 liquid Substances 0.000 claims abstract description 138
- 238000011056 performance test Methods 0.000 claims abstract description 20
- 230000004907 flux Effects 0.000 claims abstract description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 58
- 229910052757 nitrogen Inorganic materials 0.000 claims description 29
- 238000005303 weighing Methods 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 6
- 238000009792 diffusion process Methods 0.000 claims description 3
- 239000007791 liquid phase Substances 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- 238000000926 separation method Methods 0.000 claims description 2
- 239000012071 phase Substances 0.000 claims 1
- 238000001514 detection method Methods 0.000 description 7
- 239000007789 gas Substances 0.000 description 3
- 239000012530 fluid Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- 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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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The present invention relates to a kind of low temperature mass flowmenter performance testing device and method, mainly solve the problems, such as that safety in the prior art is lower, accuracy is lower.The present invention is by using a kind of low temperature mass flowmenter performance testing device, including low-temperature storage tank, immersed pump, gas-liquid separator, measured stream meter, electronic balance, standard scale system, control system, low-temperature storage tank is connected with immersed pump entrance, immersed pump outlet is connected with gas-liquid separator, gas-liquid separator bottom is connected with low-temperature storage tank, mouth is included in measured flux at the top of gas-liquid separator to be connected, the outlet of measured stream meter is connected with standard scale system, standard scale system is connected with commutator, and commutator is connected with the liquid storage bottle on electronic balance；Control system is connected with measured stream meter, standard scale system, emperor's balance, immersed pump, commutator and the technical solution of method preferably solves the above problem, can be used in low temperature mass flowmenter performance test.
Description
Technical field
The present invention relates to a kind of low temperature mass flowmenter performance testing device and methods.
Background technique
Coriolis low temperature mass flowmenter is unique measuring equipment in LNG gas station, the measuring accuracy of the flowmeter
Etc. performances directly affect the fairness of trading, it is therefore necessary to periodically carry out accuracy correction.Detection approach common at present
There are mainly two types of: first, directly carry out the accuracy detection of method of standard table, but this method to flowmeter by equipment in gas station
Waste caused by the normal operation and LNG that will affect gas station first excessively vaporize, additionally there are some potential safety problemss；The
Two, flowmeter is individually detected by test device, i.e., precision calibration is carried out to flowmeter by method of standard table.Due to
Current and exclusive calibrating specification clearly detects medium, therefore many enterprises are replaced using water gauge, determine cryogenic flow by water gauge
Meter, can only simulate the mobility of LNG, can not material property and mechanical performance of the detection stream meter under low temperature, environment with pressure.
There is no for the cryogenic flow meter pertinent literature that standard scale detects under cryogenic media at present.
Summary of the invention
The first technical problem to be solved by the present invention is the problem that safety in the prior art is lower, accuracy is lower,
A kind of new low temperature mass flowmenter performance testing device is provided.The device has the advantages that safety is higher, accuracy is higher.
The second technical problem to be solved by the present invention is to provide one kind and corresponding low temperature quality stream one of the technical issues of solution
Meter performance test methods.
One of in order to solve the above problem, The technical solution adopted by the invention is as follows: a kind of low temperature mass flowmenter performance is surveyed
Trial assembly is set, including low-temperature storage tank, immersed pump, gas-liquid separator, measured stream meter, electronic balance, standard scale system, control system
System, low-temperature storage tank are connected with immersed pump entrance, and immersed pump outlet is connected with gas-liquid separator, and gas-liquid separator bottom and low temperature store up
Tank is connected, and is included in mouth with measured flux at the top of gas-liquid separator and is connected, and the outlet of measured stream meter is connected with standard scale system, standard
Table system is connected with commutator, and commutator is connected with the liquid storage bottle on electronic balance；Control system and measured stream meter, standard scale
System, emperor's balance, immersed pump, commutator are connected
In above-mentioned technical proposal, it is preferable that be equipped at least one liquid feed valve before each measured stream meter pipeline.
In above-mentioned technical proposal, it is preferable that be equipped with liquid feed valve before the immersed pump entrance.
In above-mentioned technical proposal, it is preferable that the pipeline that the gas-liquid separator bottom returns to low-temperature storage tank is equipped with exhaust
Pipeline, exhaust line are equipped with diffusion valve and needle valve.
In order to solve the above problem two, The technical solution adopted by the invention is as follows: a kind of low temperature mass flowmenter performance is surveyed
Method for testing carries out the performance test of low temperature mass flowmenter using low temperature mass flowmenter performance testing device, includes the following steps:
(1) stage is pre-chilled in equipment；
Immersed pump is pre-chilled first, liquid feed valve A and time liquid valve A are opened, and liquid feed valve B is closed, and liquid nitrogen enters immersed pump
Pump pond after, immersed pump low-frequency start, liquid nitrogen flows in immersed pump, gas-liquid separator, low-temperature storage tank and related pipeline at this time
Dynamic pre-cooling；It is then shut off back liquid valve A, liquid feed valve B, time liquid valve B and corresponding liquid feed valve C, commutator is opened and switches to back liquid
Pipeline, liquid nitrogen flows separately through measured stream meter, commutator after gas-liquid separator at this time, finally returns in low-temperature storage tank, thus
Complete the pre-cooling work of method of standard table test line；Pass through the switching of commutator, moreover it is possible to complete to the pre- of the liquid storage bottle of mass method
It is cold；
(2) the performance test stage；
1) method of standard table is tested: being opened liquid feed valve A, liquid feed valve B, liquid feed valve C and is returned liquid valve B, closes back liquid valve A, liquid
It after nitrogen flows through measured stream meter and standard scale system from low-temperature storage tank, then through commutator and returns liquid valve B and returns to low-temperature storage tank, during which
Flowmeter and the signal of standard scale system have carried out related operation and processing by control system acquisition, to realize standard
To the performance test of mass flowmenter under table method, wherein measured stream meter pipeline is able to achieve using simultaneously column distribution to different bores
The test of flowmeter；
2) mass method is tested: being opened liquid feed valve A, liquid feed valve B, liquid feed valve C and is returned liquid valve B, closes back liquid valve A, commutate
Device switches over, and liquid nitrogen flows through measured stream meter from low-temperature storage tank, and subsequently into liquid storage bottle, electronic balance can be to servicing fluids
Nitrogen is timed, quantitative weighing, compares with measured stream meter, to complete the test of mass method；After the completion of weighing, liquid nitrogen exists
Home discharge.
In above-mentioned technical proposal, it is preferable that the capital equipment in the standard scale system is measuring accuracy higher quality
Flowmeter, for demarcating tested mass flowmenter precision.
In above-mentioned technical proposal, it is preferable that commutator allows hand over the flow direction of liquid nitrogen, commutator one end and gas-liquid separator
Bottom liquid phases pipeline is connected.
In above-mentioned technical proposal, it is preferable that electronic balance and liquid storage bottle are the capital equipments of mass method, for filling
Liquid nitrogen is weighed.
In above-mentioned technical proposal, it is preferable that mass method test is also able to achieve the test of tracing to the source to standard scale.
The present invention has method of standard table and two kinds of mass method detections to realize the performance detection under liquid nitrogen environment to flowmeter
Method may be implemented to install the performance test of different size flowmeter using skid, simple and efficient, easy to operate, achieve
Preferable technical effect.
Detailed description of the invention
Fig. 1 is the flow diagram of device of the present invention.
In Fig. 1,1-low-temperature storage tank；2-return liquid valve A；3-liquid feed valve A；4-immersed pumps；5-diffusion valves；6-needle-like
Valve；7-return liquid valve B；8-gas-liquid separators；9-liquid feed valve B；10- measured stream meter extension bits；11-standard scale systems；
12-commutators；13-electronic balances and liquid storage bottle；14-control systems；15-measured stream meters；16-liquid feed valve C.
The present invention will be further described below by way of examples, but is not limited only to the present embodiment.
Specific embodiment
[embodiment 1]
A kind of low temperature mass flowmenter performance test methods carry out low temperature using low temperature mass flowmenter performance testing device
Mass flowmenter performance test, the low temperature mass flowmenter performance testing device include low-temperature storage tank, immersed pump, gas-liquid separation
Device, measured stream meter, electronic balance, standard scale system, control system, low-temperature storage tank are connected with immersed pump entrance, and immersed pump goes out
Mouth is connected with gas-liquid separator, and gas-liquid separator bottom is connected with low-temperature storage tank, is included at the top of gas-liquid separator with measured flux
Mouth is connected, and the outlet of measured stream meter is connected with standard scale system, and standard scale system is connected with commutator, commutator and electronic balance
On liquid storage bottle be connected；Control system is connected with measured stream meter, standard scale system, emperor's balance, immersed pump, commutator.
Capital equipment in standard scale system is measuring accuracy higher quality flowmeter, for demarcating tested mass flow
Count precision.
Commutator allows hand over the flow direction of liquid nitrogen, and commutator one end is connected with gas-liquid separator bottom liquid phases pipeline.
Electronic balance and liquid storage bottle are the capital equipments of mass method, for weighing to the liquid nitrogen of filling.
At least one liquid feed valve is equipped with before each measured stream meter pipeline.
Liquid feed valve is equipped with before the immersed pump entrance.
The pipeline that the gas-liquid separator bottom returns to low-temperature storage tank is equipped with exhaust line, and exhaust line is equipped with release
Valve and needle valve.
When carrying out the performance test of low temperature mass flowmenter, include the following steps:
(1) stage is pre-chilled in equipment；
Immersed pump is pre-chilled first, liquid feed valve A and time liquid valve A are opened, and liquid feed valve B is closed, and liquid nitrogen enters immersed pump
Pump pond after, immersed pump low-frequency start, liquid nitrogen flows in immersed pump, gas-liquid separator, low-temperature storage tank and related pipeline at this time
Dynamic pre-cooling；It is then shut off back liquid valve A, liquid feed valve B, time liquid valve B and corresponding liquid feed valve C, commutator is opened and switches to back liquid
Pipeline, liquid nitrogen flows separately through measured stream meter, commutator after gas-liquid separator at this time, finally returns in low-temperature storage tank, thus
Complete the pre-cooling work of method of standard table test line；Pass through the switching of commutator, moreover it is possible to complete to the pre- of the liquid storage bottle of mass method
It is cold；
(2) the performance test stage；
1) method of standard table is tested: being opened liquid feed valve A, liquid feed valve B, liquid feed valve C and is returned liquid valve B, closes back liquid valve A, liquid
It after nitrogen flows through measured stream meter and standard scale system from low-temperature storage tank, then through commutator and returns liquid valve B and returns to low-temperature storage tank, during which
Flowmeter and the signal of standard scale system have carried out related operation and processing by control system acquisition, to realize standard
To the performance test of mass flowmenter under table method, wherein measured stream meter pipeline is able to achieve using simultaneously column distribution to different bores
The test of flowmeter；
2) mass method is tested: being opened liquid feed valve A, liquid feed valve B, liquid feed valve C and is returned liquid valve B, closes back liquid valve A, commutate
Device switches over, and liquid nitrogen flows through measured stream meter from low-temperature storage tank, and subsequently into liquid storage bottle, electronic balance can be to servicing fluids
Nitrogen is timed, quantitative weighing, compares with measured stream meter, to complete the test of mass method；After the completion of weighing, liquid nitrogen exists
Home discharge；Mass method test is also able to achieve the test of tracing to the source to standard scale.
The present invention has method of standard table and two kinds of mass method detections to realize the performance detection under liquid nitrogen environment to flowmeter
Method may be implemented to install the performance test of different size flowmeter using skid, simple and efficient, easy to operate, achieve
Preferable technical effect.
Claims (9)
1. a kind of low temperature mass flowmenter performance testing device, including low-temperature storage tank, immersed pump, gas-liquid separator, measured flux
Meter, electronic balance, standard scale system, control system, low-temperature storage tank are connected with immersed pump entrance, immersed pump outlet and gas-liquid separation
Device is connected, and gas-liquid separator bottom is connected with low-temperature storage tank, is included in mouth with measured flux at the top of gas-liquid separator and is connected, measured stream
Meter outlet is connected with standard scale system, and standard scale system is connected with commutator, commutator and the liquid storage bottle phase on electronic balance
Even；Control system is connected with measured stream meter, standard scale system, emperor's balance, immersed pump, commutator.
2. low temperature mass flowmenter performance testing device according to claim 1, it is characterised in that each measured stream meter pipe
At least one liquid feed valve is equipped with before line.
3. low temperature mass flowmenter performance testing device according to claim 1, it is characterised in that before the immersed pump entrance
Equipped with liquid feed valve.
4. low temperature mass flowmenter performance testing device according to claim 1, it is characterised in that the gas-liquid separator bottom
The pipeline that portion returns to low-temperature storage tank is equipped with exhaust line, and exhaust line is equipped with diffusion valve and needle valve.
5. a kind of low temperature mass flowmenter performance test methods are surveyed using low temperature mass flowmenter performance described in claim 1
Trial assembly, which is set, carries out the performance test of low temperature mass flowmenter, includes the following steps:
(1) stage is pre-chilled in equipment；
Immersed pump is pre-chilled first, liquid feed valve A and time liquid valve A are opened, and liquid feed valve B is closed, and liquid nitrogen enters the pump of immersed pump
Chi Hou, immersed pump low-frequency start, at this time liquid nitrogen flowing in immersed pump, gas-liquid separator, low-temperature storage tank and related pipeline are pre-
It is cold；It is then shut off back liquid valve A, liquid feed valve B, time liquid valve B and corresponding liquid feed valve C, commutator is opened and switches to liquid back pipe line,
Liquid nitrogen flows separately through measured stream meter, commutator after gas-liquid separator at this time, finally returns in low-temperature storage tank, to complete to mark
The pre-cooling work of quasi- table method test line；Pass through the switching of commutator, moreover it is possible to complete the pre-cooling to the liquid storage bottle of mass method；
(2) the performance test stage；
1) method of standard table is tested: being opened liquid feed valve A, liquid feed valve B, liquid feed valve C and is returned liquid valve B, closes back liquid valve A, liquid nitrogen is certainly
After low-temperature storage tank flows through measured stream meter and standard scale system, then through commutator and returns liquid valve B and return to low-temperature storage tank, during which flow
Meter and the signal of standard scale system have carried out related operation and processing by control system acquisition, to realize method of standard table
Under performance test to mass flowmenter, wherein measured stream meter pipeline using and column distribution, be able to achieve to different bore flows
The test of meter；
2) mass method is tested: open liquid feed valve A, liquid feed valve B, liquid feed valve C and return liquid valve B, close back liquid valve A, commutator into
Row switching, liquid nitrogen flows through measured stream meter from low-temperature storage tank, subsequently into liquid storage bottle, electronic balance can to filling liquid nitrogen into
Row timing, quantitative weighing, compare with measured stream meter, to complete the test of mass method；After the completion of weighing, liquid nitrogen is in safety
Position discharge.
6. low temperature mass flowmenter performance test methods according to claim 5, it is characterised in that in the standard scale system
Capital equipment be measuring accuracy higher quality flowmeter, for demarcating tested mass flowmenter precision.
7. low temperature mass flowmenter performance test methods according to claim 5, it is characterised in that commutator allows hand over liquid
The flow direction of nitrogen, commutator one end are connected with gas-liquid separator bottom liquid phases pipeline.
8. low temperature mass flowmenter performance test methods according to claim 5, it is characterised in that electronic balance and liquid storage bottle
It is the capital equipment of mass method, for weighing to the liquid nitrogen of filling.
9. low temperature mass flowmenter performance test methods according to claim 5, it is characterised in that mass method test can also be real
Now to the test of tracing to the source of standard scale.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710674551.XA CN109387265A (en) | 2017-08-09 | 2017-08-09 | Low temperature mass flowmenter performance testing device and method |
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| CN201710674551.XA CN109387265A (en) | 2017-08-09 | 2017-08-09 | Low temperature mass flowmenter performance testing device and method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113758546A (en) * | 2021-09-23 | 2021-12-07 | 深圳市质量安全检验检测研究院 | Flowmeter calibrating device and method and flowmeter assembly to be measured |
| CN114088169A (en) * | 2021-11-09 | 2022-02-25 | 浙江浙能富兴燃料有限公司 | Air pressure driven liquid hydrogen flow standard device adopting bidirectional mass method |
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