CN108195445A - Stream examines and determine secondary standard device and method to a kind of natural gas big flow in fact - Google Patents
Stream examines and determine secondary standard device and method to a kind of natural gas big flow in fact Download PDFInfo
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- CN108195445A CN108195445A CN201711491270.7A CN201711491270A CN108195445A CN 108195445 A CN108195445 A CN 108195445A CN 201711491270 A CN201711491270 A CN 201711491270A CN 108195445 A CN108195445 A CN 108195445A
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 64
- 239000003345 natural gas Substances 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title description 10
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 97
- 239000007789 gas Substances 0.000 claims description 20
- 238000010561 standard procedure Methods 0.000 claims description 3
- 230000000903 blocking effect Effects 0.000 claims 1
- 238000012795 verification Methods 0.000 abstract description 12
- 230000009897 systematic effect Effects 0.000 abstract description 10
- 238000012423 maintenance Methods 0.000 abstract description 5
- 238000012938 design process Methods 0.000 abstract description 3
- 238000007689 inspection Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 230000010355 oscillation Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 102220068554 rs201088893 Human genes 0.000 description 2
- 102220062248 rs568171603 Human genes 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
Classifications
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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
- G01F25/15—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume of flowmeters specially adapted for gas meters
Abstract
The present invention provides a kind of natural gas big flow stream calibrating secondary standard device in fact, the critical flow nozzle being arranged in parallel including upstream header, downstream header and 15 tunnels；Each critical flow nozzle lower end is connected with downstream header, and each critical flow nozzle upper end is connected with upstream header；Each critical flow nozzle upstream is equipped with rectifier, and each critical flow nozzle downstream is equipped with expansion bend.The present invention is in the design process of national oil natural gas Large flow station Yulin calibrating point, using the arrangement achieves the calibratings to work grade proving flowmeter and other high precision flows.Reduce tube capacity 1.3m during small flow verification3, improve systematic survey uncertainty during calibrating.The quantity of zero leakage forced seal ball valve has been simplified, has reduced about 500,000 dollars of plant investment cost and valve maintenance 200,000/year of cost.
Description
Technical field
The invention belongs to gas metering field, stream examines and determine secondary standard device to more particularly to a kind of natural gas big flow in fact
And method.
Background technology
1. domestic real stream calibrating transmission of quantity value system situation
At present, domestic trade handing-over medium-large caliber（DN200 and more than）Gas metering flowmeter such as ultrasonic flowmeter, whirlpool
Flowmeters etc.（Tested flowmeter）Use method of standard table（Working stamndard）Carry out real stream compulsory verification, calibration, working stamndard
Systematic uncertainty up to 0.33%, standard scale generally uses 0.25 grade of high-precision gas turbine flowmeter.To the reality of standard scale
Compulsory verification, calibration are flowed, since critical flow nozzle has stable critical properties of flow and very high efflux coefficient uncertainty, state
Interior gas metering calibrating website mainly carries out real stream calibrating, secondary dress using the second unit of critical flow nozzle composition in parallel
The systematic uncertainty put can reach 0.25%.The critical flow nozzle of second unit is then by the simple standard of mt methods（System is not known
Degree is up to 0.1% ~ 0.05%）Real stream compulsory verification is carried out, forms perfect transmission of quantity value system：
2. domestic secondary calibrating installation situation
The secondary standard of domestic natural gas measurement verification website is made of one group of critical flow nozzle in parallel into sled, on nozzle,
Downstream sets the air inlet header of 1 tool DN350 and outlet header respectively, per the setting of nozzle upstream and downstream all the way block valve, for realizing
The combination selection of different flow.
According to the maximum detection capability of the range ability of accredited working stamndard flowmeter and simple standard（Largest domestic
400m3/h）, second unit needs to select the range of single nozzle and determines the nozzle quantity of each range.Largest domestic is advised at present
Single set second unit operating mode flow of mould is 3100m3/ h, systematic uncertainty 0.25%, most 12 of nozzle quantity, nozzle allusion quotation
Type range is 10m3/h、20m3/h、40m3/h、80m3/h、160m3/h、320m3/h、400m3/ h, gamut can examine and determine DN50 ~
DN250（10~2500m3/h）High-precision turbine proving flowmeter.
3. the flow of domestic secondary standard calibration operation proving flowmeter
During secondary standard calibration operation grade standard, calibrating air-flow journey is：Calibrating carrys out gas → work grade standard upstream header → tested
Work grade proving flowmeter pipeline → work grade standard downstream trip header → bypass is crossed on verification table position pipeline → secondary standard
Swim header → required Nozzle combination pipeline → secondary standard upstream header → exhaust；The flow of work grade flowmeter is detected according to this
Range needs several flow points examined and determine according to the requirement selection of vertification regulation, corresponding to open secondary standard Nozzle combination pipeline.
The flow there are the problem of：
1）Examine and determine tube capacity of the process system between nozzle upstream and accredited working stamndard flowmeter（Piping volume）It is larger, this
When sample is examined and determine, the natural gas between tested flowmeter, nozzle is flowed through easily because tube capacity is too greatly by system pressure, environment temperature
Influence and volume change occurs, same time scale is caused to flow through the gas discharge of tested working stamndard flowmeter and nozzle
It changes, so as to increase verification system uncertainty.
2）Particularly examining and determine small flow section（< 150m3/h）When, the side of 1 tool heavy caliber header of second unit upstream setting
When formula necessarily leads to small flow nozzle operation, tube capacity influence becomes larger, and increases systematic uncertainty；
3）For in calibrating big flow section（> 1000m3/h）When, it is same for selecting per the setting block valve of nozzle upstream and downstream all the way
The Nozzle combination of Shi Kaiguan, a large amount of block valve increase investment and dimension instead there is no the effect for realizing nozzle flow combination
Shield.
Invention content
In order to overcome the problems, such as that existing calibrating accuracy is low and cost investment is high, the present invention provides a kind of big stream of natural gas
The real stream calibrating secondary standard device and method of amount, the present invention optimize the group sledge form of secondary standard device, reduce small stream
The tube capacity of upstream header during amount calibrating, improves calibrating accuracy；The quantity of block valve is reduced, reduces investment and dimension to a certain extent
Shield.The present invention applies and point is examined and determine in national oil natural gas Large flow station Yulin, device calibrating range（10m3/h~
4230m3/h）, systematic uncertainty 0.22% can gamut calibrating DN50 ~ DN300（10~4000m3/h）High-precision work mark
Quasi- flowmeter.
Stream examines and determine secondary standard device to a kind of natural gas big flow in fact, including upstream header, downstream header and 15 tunnels simultaneously
Join the critical flow nozzle of setting；Each critical flow nozzle lower end is connected with downstream header, each critical flow nozzle upper end with
Upstream header connection；Each critical flow nozzle upstream is equipped with rectifier, and each critical flow nozzle downstream is equipped with expansion bend.
The upstream header include the first upstream header, the second upstream header and third upstream header, described first
It is connected between upstream header and the second upstream header by the first header forced seal ball valve, the second upstream header and third upstream
It is connected between header by the second header forced seal ball valve；First upstream header is equipped with two entrances, first entrance and the
Two entrances, first entrance pipeline are DN250, and second entrance pipeline is DN100；It sets on second upstream header and enters there are one third
Mouthful, third suction line is DN150.
The first upstream header is connected with four road critical flow nozzles, and four critical flow nozzles are DN50 nozzles, flow
Respectively 10 m3/h、20 m3/h、40 m3/ h and 80m3/h；First upstream header is DN250.
The second upstream header is connected with six road critical flow nozzles, and six road critical flow nozzles are DN100 nozzles, wherein
The flow of two critical flow nozzles is respectively 160 m3/ h and 320 m3/ h, the flow of remaining four critical flow nozzle is 400
m3/ h, the second upstream header are DN300.
The third upstream header is connected with five road critical flow nozzles, and five road critical flow nozzles are DN100 nozzles, stream
Amount is 400 m3/h；Third upstream header is DN300.
The expansion bend downstream is equipped with lower forced seal ball valve.
The rectifier upper end is equipped with upper forced seal ball valve.
Stream examines and determine secondary standard method to a kind of natural gas big flow in fact, the specific steps are：
When calibration operation proving flowmeter group or calibrating DN250-DN300 high-precision flow timing, calibrating gas passes through first entrance
Into the first upstream header, by the critical flow nozzle of the different ways of unlatching, downstream is discharged to by outlet；
A, when calibrating flow point is less than or equal to 150 m3During/h, the first header forced seal ball valve is closed, while open on first
Swim four road critical flow nozzles of header lower end setting；
B, when calibrating flow point is 150 m3/h—2000 m3/ h opens the first header forced seal ball valve, closes the second header
Forced seal ball valve, simultaneously；
C, when calibrating flow point is more than for 2000 m3During/h, the second header forced seal ball valve is opened；
When calibrating DN50-DN100 high-precision flow timing, first entrance is closed, calibrating gas enters by second entrance on first
Header is swum, by the critical flow nozzle 3 of the different ways of unlatching, downstream is discharged to by outlet；
A, when calibrating flow point is less than or equal to 150 m3During/h, the first header forced seal ball valve is closed；
B, when calibrating flow point is more than 150 m3/ h opens the first header forced seal ball valve, simultaneously closes off the pressure of the second header
Seal ball-valve；
When calibrating DN150 high-precision flow timing, first entrance, second entrance and the second header forced seal ball valve, inspection are closed
Determine gas and enter third upstream header by third entrance, by the critical flow nozzle of the different ways of unlatching, be discharged to down by outlet
Trip.
Beneficial effects of the present invention are：
The present invention is realized in the design process of national oil natural gas Large flow station Yulin calibrating point using the present apparatus
Calibrating to work grade proving flowmeter and other high precision flows.
1st, reduce tube capacity 1.3m during small flow verification3, improve systematic survey uncertainty during calibrating.According to inspection
It establishes rules model, when calibrating should ensure that pressure oscillation is no more than 0.5%, in the case where temperature remains unchanged, tube capacity natural gas storage mark
Quasi- operating mode volume change Δ V=（V1-V2)*0.5%=0.28m3, the maximum uncertainty for influencing flow measurements is uq=(Δ
V/V2)1/2=0.2。】
2nd, simplified the quantity of zero leakage forced seal ball valve, reduce about 500,000 dollars of plant investment cost and valve maintenance into
This 200,000/year.
It is further detailed below with reference to attached drawing.
Attached drawing and explanation
Fig. 1 is a kind of natural gas big flow secondary standard schematic device that stream is examined and determine in fact.
In figure, reference numeral is：1st, upstream header；101st, the first upstream header；102nd, the second upstream header；103rd, third
Upstream header；104th, first entrance；105th, second entrance；106th, third entrance；107th, the first header forced seal ball valve；108、
Second header forced seal ball valve；2nd, downstream header；3rd, critical flow nozzle；4th, rectifier；5th, expansion bend；6th, upper forced seal ball
Valve；7th, lower forced seal ball valve.
Specific embodiment
Embodiment 1：
In order to overcome the problems, such as that existing calibrating accuracy is low and cost investment is high, it is natural that the present invention provides one kind as shown in Figure 1
Stream calibrating secondary standard device and method, the present invention optimize the group sledge form of secondary standard device, subtract gas big flow in fact
When young during flow verification upstream header tube capacity, improve calibrating accuracy；The quantity of block valve is reduced, reduces throw to a certain extent
Money and maintenance.
Stream examines and determine secondary standard device to a kind of natural gas big flow in fact, including upstream header 1,2 and 15 tunnel of downstream header
The critical flow nozzle 3 being arranged in parallel；Each 3 lower end of critical flow nozzle is connected with downstream header 2, on each critical flow nozzle 3
End is connected with upstream header 1；Each 3 upstream of critical flow nozzle is equipped with rectifier 4, and each 3 downstream of critical flow nozzle is all provided with
There is expansion bend 5.
The calibrating gas detected is needed to enter device by upstream header 1 in the present invention, passes through facing for the different ways of unlatching
Boundary's flow nozzle 3 is discharged to downstream by outlet.
The present invention reduces tube capacity 1.3m during small flow verification3, improve systematic survey uncertainty during calibrating.Meter
Calculation process：
Calculating tube capacity V1=1.457m that device is not optimised3, when 4.2MPa is examined and determine natural gas storage standard condition volume V10=
43*V1=62.65m3；
Tube capacity V2=0.162m is calculated after installation optimization3, natural gas storage standard condition volume V20=43* when 4.2MPa is examined and determine
V2=6.97m3。
According to calibrating specification, when calibrating, should ensure that pressure oscillation is no more than 0.5%, in the case where temperature remains unchanged, pipe
Appearance natural gas storage standard condition volume change Δ V=（V1-V2)*0.5%=0.28m3, influence flow measurements most very much not
Degree of certainty is uq=(Δ V/V2)1/2=0.2。
Embodiment 2：
On the basis of above-described embodiment, in the present embodiment, the upstream header 1 includes the first upstream header 101, second
Upstream header 102 and third upstream header 103 converge between the first upstream header 1 and the second upstream header 2 by first
Pipe forced seal ball valve 107 connects, and passes through the second header forced seal ball between the second upstream header 2 and third upstream header 3
Valve 108 connects；First upstream header 101 is equipped with two entrances, first entrance 104 and second entrance 105, first entrance 104
Pipeline is DN250, and 105 pipeline of second entrance is DN100；Third entrance 106 there are one being set on second upstream header 102, third
106 pipeline of entrance is DN150.
The first upstream header 101 is connected with four road critical flow nozzles 3, and four critical flow nozzles 3 are DN50 nozzles,
Flow is respectively 10 m3/h、20 m3/h、40 m3/ h and 80m3/h；First upstream header 101 is DN250.
The second upstream header 102 is connected with six road critical flow nozzles 3, and six road critical flow nozzles 3 are sprayed for DN100
Mouth, the flow of two of which critical flow nozzle 3 is respectively 160 m3/ h and 320 m3/ h, the flow of remaining four critical flow nozzle 3
It is 400 m3/ h, the second upstream header 102 are DN300.
The third upstream header 103 is connected with five road critical flow nozzles 3, and five road critical flow nozzles 3 are DN100 sprays
Mouth, flow are 400 m3/h；Third upstream header 103 is DN300.
5 downstream of expansion bend is equipped with lower forced seal ball valve 7.
4 upper end of rectifier is equipped with upper forced seal ball valve 6.
The present invention has simplified the quantity of zero leakage forced seal ball valve, reduces about 500,000 dollars of plant investment cost and valve
Door 200,000/year of maintenance cost.The present invention reduces tube capacity 1.3m during small flow verification3, improve systematic survey during calibrating
Uncertainty.
Stream examines and determine secondary standard method to a kind of natural gas big flow in fact, the specific steps are：
When calibration operation proving flowmeter group or calibrating DN250-DN300 high-precision flow timing, calibrating gas passes through first entrance
104 enter the first upstream header 101, and by the critical flow nozzle 3 of the different ways of unlatching, downstream is discharged to by outlet；
A. when calibrating flow point is less than or equal to 150 m3During/h, the first header forced seal ball valve 107 is closed, while open the
Four road critical flow nozzles 3 of one upstream header, 101 lower end setting；
B. when calibrating flow point is 150 m3/h—2000 m3/ h opens the first header forced seal ball valve 107, closes second
Header forced seal ball valve 108, simultaneously；
C. when calibrating flow point is more than for 2000 m3During/h, the second header forced seal ball valve 108 is opened；
When calibrating DN50-DN100 high-precision flow timing, first entrance 104 is closed, calibrating gas enters by second entrance 105
By the critical flow nozzle 3 of the different ways of unlatching, downstream is discharged to by outlet for first upstream header 101.
A. when calibrating flow point is less than or equal to 150 m3During/h, the first header forced seal ball valve 107 is closed；
B. when calibrating flow point is more than 150 m3/ h opens the first header forced seal ball valve 107, simultaneously closes off the second header
Forced seal ball valve 108；
When calibrating DN150 high-precision flow timing, first entrance 104,105 and second header forced seal ball of second entrance are closed
Valve 108, calibrating gas enter third upstream header 103 by third entrance 107, pass through the critical flow nozzle of the different ways of unlatching
3, downstream is discharged to by outlet；
When calibration operation proving flowmeter group or calibrating DN250-DN300 high-precision flow timing, calibrating gas passes through first entrance
104 enter device, and by the nozzle of the different ways of unlatching, downstream is discharged to by outlet.When calibrating flow point is less than or equal to 150
m3During/h, the first upstream header forced seal ball valve 107 is closed, is sprayed using only four tunnels of 101 lower end of the first upstream header connection
Mouth can realize inspection, reduce tube capacity in this way, improve calibrating accuracy；When calibrating flow point is less than or equal to 2000 m3/
H is not turned on the second upstream header forced seal ball valve 108, the five tunnels spray of 103 lower end connection of third upstream header when reducing calibrating
The influence of tube capacity in mouth；When calibrating flow point is more than for 2000 m3During/h, the second upstream header forced seal ball valve 108 is opened,
Five road nozzles of 103 lower end of third upstream header connection are opened simultaneously, and the range of flow of device is made to meet tested flow point.
When calibrating DN50-DN100 high-precision flow timing, first entrance 104 is closed, calibrating gas passes through second entrance 105
Into device, by the nozzle of the different ways of unlatching, downstream is discharged to by outlet.When calibrating flow point is less than or equal to 150 m3/h
When, the first upstream header forced seal ball valve 107 is closed, four road nozzles of 101 lower end of the first upstream header connection can be real
It now examines, reduces tube capacity in this way, improve calibrating accuracy；When calibrating flow point is more than 150 m3/ h opens the first upstream
Header forced seal ball valve 107 simultaneously closes off the second upstream header forced seal ball valve 108, the shadow of right side tube capacity when reducing calibrating
It rings.DN100 turbine flowmeters maximum range is no more than 1000m3/ h, so do not need to open the second upstream header forced seal ball
Valve 108；When calibrating DN150 high-precision flow timing, 104 and first upstream header forced seal valve 107 of first entrance, inspection are closed
Determine gas and enter device by third entrance 106, by the nozzle of the different ways of unlatching, downstream is discharged to by outlet.DN150 turbines
Flowmeter maximum range is no more than 2000 m3/ h, without opening the second upstream header forced seal ball valve 108, when reducing calibrating
The influence of tube capacity in five road nozzles of 103 lower end of third upstream header connection.
The present invention is in the design process of national oil natural gas Large flow station Yulin calibrating point, using device reality
The calibrating to work grade proving flowmeter and other high precision flows is showed.Reduce tube capacity 1.3m during small flow verification3,
Improve systematic survey uncertainty during calibrating.【Calculating process：
1）Calculating tube capacity V1=1.457m that device is not optimised3, when 4.2MPa is examined and determine natural gas storage standard condition volume V10=
43*V1=62.65m3；
2）Tube capacity V2=0.162m is calculated after installation optimization3, when 4.2MPa is examined and determine natural gas storage standard condition volume V20=
43*V2=6.97m3。
According to calibrating specification, when calibrating, should ensure that pressure oscillation is no more than 0.5%, in the case where temperature remains unchanged, pipe
Appearance natural gas storage standard condition volume change Δ V=（V1-V2)*0.5%=0.28m3, influence flow measurements most very much not
Degree of certainty is uq=(Δ V/V2)1/2=0.2.】The present invention has simplified the quantity of zero leakage forced seal ball valve, reduces device throwing
Provide about 500,000 dollars of cost and valve maintenance 200,000/year of cost.Device feature involved in the present invention is existing apparatus, can be
It directly buys in the market.
The foregoing examples are only illustrative of the present invention, does not form the limitation to protection scope of the present invention, all
Be with the present invention it is the same or similar design all belong to the scope of protection of the present invention within.Unspecified device in the present invention
And structure is the prior art, will no longer be illustrated one by one in the present invention.
Claims (8)
1. stream examines and determine secondary standard device to a kind of natural gas big flow in fact, it is characterised in that：Including upstream header（1）, downstream converge
Pipe（2）The critical flow nozzle being arranged in parallel with 15 tunnels（3）；Each critical flow nozzle（3）Lower end with downstream header（2）Even
It is logical, each critical flow nozzle（3）Upper end with upstream header（1）Connection；Each critical flow nozzle（3）Upstream is equipped with rectifier
（4）, each critical flow nozzle（3）Downstream is equipped with expansion bend（5）.
2. stream examines and determine secondary standard device to a kind of natural gas big flow according to claim 1 in fact, it is characterised in that：It is described
Upstream header（1）Including the first upstream header（101）, the second upstream header（102）With third upstream header（103）, it is described
The first upstream header（1）With the second upstream header（2）Between pass through the first header forced seal ball valve（107）Connection, second
Upstream header（2）With third upstream header（3）Between pass through the second header forced seal ball valve（108）Connection；It converges the first upstream
Pipe（101）It is equipped with two entrances, first entrance（104）And second entrance（105）, first entrance（104）Pipeline is DN250,
Second entrance（105）Pipeline is DN100；Second upstream header（102）On set there are one third entrance（106）, third entrance
（106）Pipeline is DN150.
3. stream examines and determine secondary standard device to a kind of natural gas big flow according to claim 2 in fact, it is characterised in that：It is described
The first upstream header（101）It is connected with four road critical flow nozzles（3）, four critical flow nozzles（3）For DN50 nozzles, flow point
It Wei not 10 m3/h、20 m3/h、40 m3/ h and 80m3/h；First upstream header（101）For DN250.
4. stream examines and determine secondary standard device to a kind of natural gas big flow according to claim 2 in fact, it is characterised in that：It is described
The second upstream header（102）It is connected with six road critical flow nozzles（3）, six road critical flow nozzles（3）For DN100 nozzles, wherein
Two critical flow nozzles（3）Flow be respectively 160 m3/ h and 320 m3/ h, remaining four critical flow nozzle（3）Flow it is equal
For 400 m3/ h, the second upstream header（102）For DN300.
5. stream examines and determine secondary standard device to a kind of natural gas big flow according to claim 2 in fact, it is characterised in that：It is described
Third upstream header（103）It is connected with five road critical flow nozzles（3）, five road critical flow nozzles（3）It is DN100 nozzles, stream
Amount is 400 m3/h；Third upstream header（103）For DN300.
6. stream examines and determine secondary standard device to a kind of natural gas big flow according to claim 1 in fact, it is characterised in that：It is described
Expansion bend（5）Downstream is equipped with lower forced seal ball valve（7）.
7. stream examines and determine secondary standard device to a kind of natural gas big flow according to claim 1 in fact, it is characterised in that：It is described
Rectifier（4）Upper end is equipped with upper forced seal ball valve（6）.
8. stream examines and determine secondary standard device to any one natural gas big flow according to claim 1-7 in fact, one kind is provided
Stream examines and determine secondary standard method to natural gas big flow in fact, it is characterised in that：The specific steps are：
When calibration operation proving flowmeter group or calibrating DN250-DN300 high-precision flow timing, calibrating gas passes through first entrance
（104）Into the first upstream header（101）, pass through the critical flow nozzle of the different ways of unlatching（3）, downstream is discharged to by outlet；
A, when calibrating flow point is less than or equal to 150 m3During/h, the first header forced seal ball valve is closed（107）, while open the
One upstream header（101）Four road critical flow nozzles of lower end setting（3）；
B, when calibrating flow point is 150 m3/h—2000 m3/ h opens the first header forced seal ball valve（107）, close second
Header forced seal ball valve（108）, simultaneously；
C, when calibrating flow point is more than for 2000 m3During/h, the second header forced seal ball valve is opened（108）；
When calibrating DN50-DN100 high-precision flow timing, first entrance is closed（104）, calibrating gas is by second entrance（105）
Into the first upstream header（101）, pass through the critical flow nozzle of the different ways of unlatching（3）, downstream is discharged to by outlet；
A, when calibrating flow point is less than or equal to 150 m3During/h, the first header forced seal ball valve is closed（107）；
B, when calibrating flow point is more than 150 m3/ h opens the first header forced seal ball valve（107）, simultaneously close off the second header
Forced seal ball valve（108）；
When calibrating DN150 high-precision flow timing, first entrance is closed（104）, second entrance（105）It is forced with the second header close
Blocking valve（108）, calibrating gas is by third entrance（107）Into third upstream header（103）, pass through the different ways of unlatching
Critical flow nozzle（3）, downstream is discharged to by outlet.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711491270.7A CN108195445A (en) | 2017-12-30 | 2017-12-30 | Stream examines and determine secondary standard device and method to a kind of natural gas big flow in fact |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711491270.7A CN108195445A (en) | 2017-12-30 | 2017-12-30 | Stream examines and determine secondary standard device and method to a kind of natural gas big flow in fact |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103837215A (en) * | 2014-03-25 | 2014-06-04 | 重庆市计量质量检测研究院 | Reversing valve type pVTt-method gas flow device |
| CN206387479U (en) * | 2017-01-24 | 2017-08-08 | 中国石油化工股份有限公司天然气分公司计量研究中心 | It is a kind of to reduce the Natural gas flow meter verification apparatus that tube capacity improves the calibrating degree of accuracy |
| CN107300404A (en) * | 2017-06-07 | 2017-10-27 | 北京东方华智石油工程有限公司 | Natural gas flowmeter verification system |
| CN207908020U (en) * | 2017-12-30 | 2018-09-25 | 西安长庆科技工程有限责任公司 | A kind of natural gas big flow reality stream calibrating secondary standard device |
-
2017
- 2017-12-30 CN CN201711491270.7A patent/CN108195445A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103837215A (en) * | 2014-03-25 | 2014-06-04 | 重庆市计量质量检测研究院 | Reversing valve type pVTt-method gas flow device |
| CN206387479U (en) * | 2017-01-24 | 2017-08-08 | 中国石油化工股份有限公司天然气分公司计量研究中心 | It is a kind of to reduce the Natural gas flow meter verification apparatus that tube capacity improves the calibrating degree of accuracy |
| CN107300404A (en) * | 2017-06-07 | 2017-10-27 | 北京东方华智石油工程有限公司 | Natural gas flowmeter verification system |
| CN207908020U (en) * | 2017-12-30 | 2018-09-25 | 西安长庆科技工程有限责任公司 | A kind of natural gas big flow reality stream calibrating secondary standard device |
Non-Patent Citations (1)
| Title |
|---|
| 朱永宏: "音速喷嘴气体流量标准装置校准方法的研究", 《计量学报》, vol. 29, no. 5, 30 November 2008 (2008-11-30) * |
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