CN203274863U - High-pressure natural gas flowmeter calibrating device - Google Patents
High-pressure natural gas flowmeter calibrating device Download PDFInfo
- Publication number
- CN203274863U CN203274863U CN 201320370496 CN201320370496U CN203274863U CN 203274863 U CN203274863 U CN 203274863U CN 201320370496 CN201320370496 CN 201320370496 CN 201320370496 U CN201320370496 U CN 201320370496U CN 203274863 U CN203274863 U CN 203274863U
- Authority
- CN
- China
- Prior art keywords
- natural gas
- pressure natural
- gas flowmeter
- flowmeter
- sealing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Abstract
The utility model relates to a high-pressure natural gas flowmeter calibrating device, which is mainly used for solving the problems that an existing high-pressure natural gas flowmeter calibrating device has a low degree of accuracy, and generates errors in a transportation process as a flowmeter needs to be dismounted for being sent to an appointed calibrating station to be calibrated and cannot be calibrated on line. The high-pressure natural gas flowmeter calibrating device is characterized in that a horizontal rectifying plate (2) is fixed on the middle part of a housing (1); a plurality of small holes are formed in the rectifying plate (2); a plurality of spray nozzles (3) are connected to the upper part of the housing (1); pneumatic balance valves (4) are connected to the upper parts of the spray nozzles (3). The high-pressure natural gas flowmeter calibrating device provided by the utility model can be used for carrying out online calibration on the flowmeter by virtue of flow switching without dismounting the high-pressure natural gas flowmeter, and has the advantages of being high in degree of accuracy, saving installation space, lowering construction cost and the like.
Description
Technical field
The utility model relates to a kind of metrological standard unit, specifically a kind of calibrating installation for the high-pressure natural gas flowmeter.
Background technology
Calibrating and the transmission of quantity value mode of the high-pressure natural gas flowmeter of rock gas trade transaction are mainly to take the Off-line calibration mode at present, the standard turbo flowmeter requires pull down every year to deliver to the laboratory to carry out the transmission of quantity value calibrating once, and the standard ultrasound flowmeter requires to deliver to the laboratory in every 2 years and carries out the transmission of quantity value calibrating once.At present China's natural gas flowrate measurement value tracing technology development is: ⑴ bell jar, mt, PVTt method, the construction investment of method of standard table gas flow meter are large, require during laboratory work to carry out work under the working condition of 20 ℃ ± 1 ℃; ⑵ the calibrating installation investment of turbine, ultrasonic flowmeter standard scale form is little, working condition can the simulated field service condition, deliver to simple flow laboratory and carry out the gamut calibrating but the working stamndard turbo flow meter that this kind method is selected, ultrasonic flowmeter need to regularly remove, there is the problem of two aspects in this verification process, the working condition when at first examining and determine and install and use the inconsistent of condition and the censorship transportation on their uncertainties impact all can't revise by technological means; Secondly the expanded uncertainty of JJG1030-2007 " ultrasonic flowmeter " and JJG1037-2008 " turbine flowmeter " vertification regulation claimed apparatus should be not more than 1/3 of flowmeter limits of error absolute value.
Only carry out transmission of quantity value calibrating or contrastive test on the simple or Transfer Standards of the Chengdu gas metering substation at country station, Nanjing gas metering substation according to the at present domestic error of indication≤± 0.3% proving flowmeter of can examining and determine of the requirement of vertification regulation.Be subject to larger restriction for the calibrating greater than the standard scale of DN200 bore like this.
The calibrating installation at natural gas flow measuring station, Chengdu and natural gas flow measuring station, Nanjing is the box-like high pressure measurement calibrating installation of nozzle sets, they are all the structures of the pipe row formula of introduction, each pipeline of pipe row version is installed a nozzle and two controlled valves, what valve was selected according to design caliber and pressure rating is all the high-voltage electric valve, general such device needs more than 10 pipelines, connects calibration operation platform position by header and examines and determine.The calibrating installation floor area of this form structure is large, invests highly, can only design and installation carry out work in the laboratory, and can't realize the high-pressure natural gas flowmeter is examined and determine in real time.
The calibrating installation that also has in addition the metering sled formula at defeated station outside the rock gas of Tongzhou, Beijing (felling and growing), this calibrating installation adopts the calibration method of sledge formula standard scale form, what Main Regulator was selected is the turbine natural gas flowmeter (the ultrasonic type natural gas flowmeter is as the check standard table) of introducing, after excess pressure, temperature correction, the working flow meter is examined and determine, the uncertainty of the calibrating installation standard scale of this form can not be too high, because higher level's Transfer Standards can not meet the vertification regulation requirement higher than tested table 3 times.
Summary of the invention
For overcome the accuracy of existing high-pressure natural gas flowmeter verification device verification result low, flowmeter need to be pulled down to deliver to and specify calibrating station calibrating and produce error in transportation, can't realize the deficiency of calibrating in real time, the utility model provides a kind of high-pressure natural gas flowmeter verification device, and this calibrating installation does not need the high-pressure natural gas flowmeter is just pulled down and can examine and determine in real time flowmeter, accuracy is high, save the space, cost is low.
The technical solution of the utility model is: a kind of high-pressure natural gas flowmeter verification device, comprise housing, lower housing portion is connected with inlet tube, described housing middle part is fixed with the cowling panel of horizontal direction, have several rectification apertures on cowling panel, housing top is connected with several nozzles, and nozzle top is connected with Pneumatic balanced valve.
Described Pneumatic balanced valve comprises valve body, valve body top is connected with cylinder, the bottom is connected with the body that is tightly connected, be tightly connected and have several openings on the sidewall of body bottom, be tightly connected body inside is equipped with sealing-plug, the cylinder bottom is connected with sealing-plug by the bar that is tightly connected, and described sealing-plug inside has the intercommunicating pore of vertical direction, and intercommunicating pore connects the two ends up and down of sealing-plug; And be connected with nozzle bottom the body that is tightly connected, the nozzle upper inner is equipped with sealing ring, and sealing ring inwall and sealing-plug match.
The utlity model has following beneficial effect: owing to taking such scheme, this device is directly connected with natural gas flowmeter, can be to meter proof under working condition, avoid calibrating working condition and actual working conditions is inconsistent and the inconsistent error of bringing to flowmeter of mounting condition, improved high-pressure natural gas metering system precision; Solved simultaneously due to safety problem, censorship cost issues that the censorship flowmeter produces, affected the problem such as gas transmission production run; And this device is saved the space, cost is low, also is applicable to the laboratory simultaneously and uses.
Description of drawings
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the structural representation of Pneumatic balanced valve;
Fig. 3 is control principle drawing of the present utility model.
1-housing in figure, 2-cowling panel, 3-nozzle, 4-Pneumatic balanced valve, 5-outlet, 6-inlet tube, 11-cylinder, 12-valve body, the 13-bar that is tightly connected, 14-housing, the 15-body that is tightly connected, 16-sealing-plug, 17-sealing ring, 18-opening, 19-intercommunicating pore.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing:
By Fig. 1, shown in Figure 2, a kind of high-pressure natural gas flowmeter verification device, comprise housing 1, for convenience of fixing and mobile, housing 1 can be fixed on skid body, housing 1 bottom is connected with inlet tube 6, top is connected with outlet 5, can directly be fixedly mounted on rock gas trade transaction test satellite location, connects with flowmeter, thereby realize the flowmeter in-line calibration, also can be installed to the laboratory and as standard set-up, the high-pressure natural gas flowmeter be carried out Off-line calibration.Described housing 1 middle part is fixed with the cowling panel 2 of horizontal direction, has several rectification apertures on cowling panel 2, can the stabilizing gas flow state.Housing 1 top is connected with several nozzles 3, and the quantity of nozzle 3 is greater than 1, and adopts the model of different larynxs footpaths size.Nozzle 3 is standard scales of calibrating installation, and calibrating installation can be realized flowmeter is carried out verification process according to the Nozzle combination that the flow of the flow range of accredited flowmeter and selected flow point is selected to open varying number.
Nozzle 3 tops are connected with Pneumatic balanced valve 4, described Pneumatic balanced valve 4 comprises valve body 12, valve body 12 is fixed on outlet 5, valve body 12 tops are connected with cylinder 11, the bottom is connected with the body 15 that is tightly connected, being tightly connected has several openings 18 on the sidewall of body 15 bottoms, and opening 18 is generally 4, and gases at high pressure outwards flow out by opening 18 under open mode.Be tightly connected body 15 inside are equipped with sealing-plug 16, and sealing-plug 16 and being tightly connected seals by O-ring seal between body 15.Cylinder 11 bottoms are connected with sealing-plug 16 by the bar 13 that is tightly connected, and described sealing-plug 16 inside have the intercommunicating pore 19 of vertical direction, and the upper and lower side of intercommunicating pore 19 communication seals plugs 16 makes the pressure of sealing-plug 16 up and down when sealing in a basic balance.Be tightly connected body 15 bottoms are connected with nozzle 3, and nozzle 3 inner upper end inboards are equipped with sealing ring 17, and sealing ring 17 inwalls and sealing-plug 16 match.Pneumatic balanced valve 4 is special service valves of realizing flow regulating function in verification process, carry in pipeline due to the middle high-pressure rock gas generally all in 3-10MPa pressure current downflow, directly cutting off sealing is difficult to realize, and the pressure balance seal valve that adopts the special-purpose machinery structure is here realized under working condition, and the gas circuit of each nozzle is passed through in realization sealing, unlatching, the cut-out that the nitrogen power of use 0.6MPa just can be convenient, flexible.
This calibrating installation is connected with computing machine, realizes manually and automatically controlling two kinds of functions in verification process by control system, and manually controls with control automatically and can switch by switch.Its control principle is: the signal of AD acquisition module collection site transmitter, comprise temperature signal, pressure signal, the pulse signal of the tested table of pulse collection module collection site, after above-mentioned signal is processed by MCU master control and DO control module, by relay output module, on-the-spot cylinder is controlled again, simultaneously, computing machine is connected with acquisition control module by the RS485 interface, set up good man-machine working interface, connect again display, can realize that following functions: ⑴ realizes the Real time visible operation of verification process technological process; ⑵ realize the verification process automatic data collection, and the generated data table also carries out data and processes; ⑶ realize the demonstration of calibrating data, modification and output print function; ⑷ have the database memory function, can file according to instrument model, calibrating time etc., inquiry and printout; ⑸ can upload the measurement verification management data to master-control room and pipe department by network system, facilitates administrative authority to carry out data statistics and management.
This high-pressure natural gas flowmeter verification device has following advantage:
⑴, what adopt due to this device Main Regulator is the sonic nozzle that there is no movable member, it is again the secondary standard of gas metering transmission of quantity value, sonic nozzle is directly used in the flowmeter that the calibrating trade transaction uses, make 4 grades of transmittance processs of the transmission of quantity value of present middle high-pressure gas metering reduce to 3 grades of transmission, improved the accuracy of transmission of quantity value standard set-up.The class of accuracy of the outer defeated Trade Measures flow instrument outfit of China's natural gas at present requires in 1.0 grades, and it is 1/3 of flow instrument maximum error absolute value that the expanded uncertainty of calibrating installation requires.If the expanded uncertainty of online nozzle calibrating installation is 0.3%, after flow meter checking, the trade transaction both sides adopt the handing-over that carries on trade of flow meter checking coefficient can improve trade transaction systematic error ± 0.3% left and right.
⑵, the problems that existed when having solved Off-line calibration: the working condition when 1. examining and determine and install and use the problem that the inconsistent of condition and censorship transportation can't be revised by technological means the impact of standard scale uncertainty.2. the operation that relies on gas distributing system to build the test satellite location gas line network will be subject to the problem of season, safety, technological requirement restriction.3. Off-line calibration needs regularly flow instrument to be pulled down and delivers to calibrating station and examine and determine, and transportation range is generally all far away, and dismounting, trucking costs are higher, limited by test condition and sometimes can not in time examine and determine, and affect the problem of gas transmission gage work.4. owing to being subject to calibrating station detection capability restriction, the measuring instrument of censorship is simulated condition condition and the problem of carrying out the gamut calibrating fully.
⑶, this cover flow standard device standard are selected is that the critical flow venturi nozzle with different larynxs footpaths size combines, and flow range can design according to the flow range of trade transaction flowmeter, makes it satisfy the request for utilization of flowmeter fully.This device configuration rock gas online gc can be realized the energy meter of rock gas.According to JJG620-2008 " critical flow venturi nozzle " vertification regulation, nozzle can be pulled down and once deliver to the laboratory or real stream calibrating station is examined and determine in every 5 years.The device of this kind form makes that the gas discharge transmission of quantity value is simple, convenient, easy row.
, because natural gas flowmeter moves under the high pressure working condition, these instrument of demolition, installation censorship must be carried out in strict accordance with working specification, have very high peril risk, adopt the in-line calibration mode only to need the switching of flow process can realize verification process, eliminated potential safety hazard.
⑸, construction cost and existing gas discharge device relatively can reduce more than 50%, have greatly saved cost.
Claims (2)
1. high-pressure natural gas flowmeter verification device, comprise housing (1), housing (1) bottom is connected with inlet tube (6), it is characterized in that: the cowling panel (2) that is fixed with horizontal direction in the middle part of described housing (1), have several rectification apertures on cowling panel (2), housing (1) top is connected with several nozzles (3), and nozzle (3) top is connected with Pneumatic balanced valve (4).
2. high-pressure natural gas flowmeter verification device according to claim 1, it is characterized in that: described Pneumatic balanced valve (4) comprises valve body (12), valve body (12) top is connected with cylinder (11), the bottom is connected with the body that is tightly connected (15), be tightly connected and have several openings (18) on the sidewall of body (15) bottom, be tightly connected body (15) inside is equipped with sealing-plug (16), cylinder (11) bottom is connected with sealing-plug (16) by the bar that is tightly connected (13), described sealing-plug (16) inside has the intercommunicating pore (19) of vertical direction, intercommunicating pore (19) connects the two ends up and down of sealing-plug (16), be tightly connected body (15) bottom is connected with nozzle (3), and nozzle (3) upper inner is equipped with sealing ring (17), and sealing ring (17) inwall and sealing-plug (16) match.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320370496 CN203274863U (en) | 2013-06-26 | 2013-06-26 | High-pressure natural gas flowmeter calibrating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320370496 CN203274863U (en) | 2013-06-26 | 2013-06-26 | High-pressure natural gas flowmeter calibrating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203274863U true CN203274863U (en) | 2013-11-06 |
Family
ID=49505247
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320370496 Expired - Fee Related CN203274863U (en) | 2013-06-26 | 2013-06-26 | High-pressure natural gas flowmeter calibrating device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203274863U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103292878A (en) * | 2013-06-26 | 2013-09-11 | 北京聚雅科技有限公司 | Calibrating device for high-pressure natural gas flow meter |
| US10161909B2 (en) | 2015-10-29 | 2018-12-25 | Mustang Sampling Llc | Steady state fluid flow verification for sample takeoff |
| US11144078B2 (en) | 2019-09-23 | 2021-10-12 | Mustang Sampling, Llc | Adjustable multistage pressure reducing regulator |
| US11971733B2 (en) | 2022-11-22 | 2024-04-30 | Mustang Sampling, Llc | Adjustable multistage pressure reducing regulator |
-
2013
- 2013-06-26 CN CN 201320370496 patent/CN203274863U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103292878A (en) * | 2013-06-26 | 2013-09-11 | 北京聚雅科技有限公司 | Calibrating device for high-pressure natural gas flow meter |
| US10161909B2 (en) | 2015-10-29 | 2018-12-25 | Mustang Sampling Llc | Steady state fluid flow verification for sample takeoff |
| US10684259B2 (en) | 2015-10-29 | 2020-06-16 | Mustang Sampling, LLC. | Steady state fluid flow verification for sample takeoff |
| US11536694B2 (en) | 2015-10-29 | 2022-12-27 | Mustang Sampling, Llc | Steady state fluid flow verification for sample takeoff |
| US11144078B2 (en) | 2019-09-23 | 2021-10-12 | Mustang Sampling, Llc | Adjustable multistage pressure reducing regulator |
| US11573582B2 (en) | 2019-09-23 | 2023-02-07 | Mustang Sampling, Llc | Adjustable multistage pressure reducing regulator |
| US11971733B2 (en) | 2022-11-22 | 2024-04-30 | Mustang Sampling, Llc | Adjustable multistage pressure reducing regulator |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101255947B (en) | Metered system for automatically capturing fluid flux | |
| CN103837214A (en) | Combined container type gas flow detection device by pVTt method | |
| CN203274863U (en) | High-pressure natural gas flowmeter calibrating device | |
| CN204301824U (en) | A kind of aircraft oil scale in situ detection device | |
| CN206020318U (en) | A kind of gas dew point analytical equipment | |
| CN104568078A (en) | On-site ground hydraulic experiment device calibration method | |
| CN103292878A (en) | Calibrating device for high-pressure natural gas flow meter | |
| CN207798220U (en) | The check device of flowmeter calibration system | |
| CN107677342A (en) | Natural gas flowmeter verification system | |
| CN203981382U (en) | Large flow pneumatic accessories testing table | |
| CN111271606A (en) | Movable gas pressure regulating and metering pry | |
| CN104089687A (en) | Online calibration device and method for LNG filling machine | |
| CN204829260U (en) | LNG that can accurately measure adds mechanism of qi | |
| CN102095559B (en) | Calibration device of on-line SF6 (sulfur hexafluoride)-O2 leak monitoring alarm | |
| CN204439178U (en) | A kind of caliberating device of mass-flow gas meter | |
| CN203980439U (en) | Heat measuring system auto hydraulic balance control device | |
| CN114323164B (en) | Real-time online energy metering method and system for gas users | |
| CN105605425A (en) | Control system for fuel gas pressure regulation metering station | |
| CN110726547A (en) | Portable comprehensive checking device for pressure protection device | |
| CN216746365U (en) | Hydrogenation machine metering and calibrating device | |
| CN208736530U (en) | A kind of water meter calibration | |
| CN109186857A (en) | A kind of interface module for pressure measurement | |
| CN201828556U (en) | Comprehensive calibration console for gas sensor alarm device | |
| CN204007805U (en) | The online caliberating device of a kind of LNG filling machine | |
| CN202974349U (en) | Device capable of measuring flows of mediums of different densities |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131106 Termination date: 20180626 |