CN104132716B - Vehicular Oil Flowmeter Standard Apparatus - Google Patents
Vehicular Oil Flowmeter Standard Apparatus Download PDFInfo
- Publication number
- CN104132716B CN104132716B CN201410393272.2A CN201410393272A CN104132716B CN 104132716 B CN104132716 B CN 104132716B CN 201410393272 A CN201410393272 A CN 201410393272A CN 104132716 B CN104132716 B CN 104132716B
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- standard
- capacity measure
- standard capacity
- electronic scale
- commutator
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- 239000007788 liquid Substances 0.000 claims abstract description 30
- 239000000446 fuel Substances 0.000 claims abstract description 17
- 238000001514 detection method Methods 0.000 claims abstract description 12
- 238000001816 cooling Methods 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 239000006260 foam Substances 0.000 claims description 5
- 230000005611 electricity Effects 0.000 claims description 2
- 229910052752 metalloid Inorganic materials 0.000 claims 2
- 150000002738 metalloids Chemical class 0.000 claims 2
- 238000000034 method Methods 0.000 abstract description 24
- 239000012530 fluid Substances 0.000 abstract description 5
- 230000007774 longterm Effects 0.000 abstract description 3
- 230000003068 static effect Effects 0.000 description 10
- 239000002184 metal Substances 0.000 description 8
- 238000012795 verification Methods 0.000 description 8
- 238000005259 measurement Methods 0.000 description 6
- 239000000126 substance Substances 0.000 description 6
- 238000013461 design Methods 0.000 description 5
- 238000009434 installation Methods 0.000 description 5
- 238000004880 explosion Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000003129 oil well Substances 0.000 description 3
- 238000007670 refining Methods 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Abstract
The present invention relates to a kind of vehicular Oil Flowmeter Standard Apparatus, including truck, electronic scale, standard capacity measure, commutator, fuel reserve tank and power source, wherein electronic scale, standard capacity measure, commutator, fuel reserve tank and power source are arranged on truck into sledge, electronic scale is fixed in skid body, electronic scale carrying standard capacity measure；The inlet of standard capacity measure is connected to through being detected the tested media that flowmeter is detected by commutator and connection member；The liquid outlet of standard capacity measure is connected to fuel reserve tank；Power source includes pneumatic and electronic two parts, wherein pneumatic part connection commutator, and the power supply of powered part is quoted from detection field power supply.Apparatus of the present invention are solved can not dismantle the calibration operation of oily flow instrument online, ensure not shake in transport driving, ensure that measuring device long-term safety is accurately measured, the data examined and determine than ever with other calibration methods improve 10 double precisions, and the high-precision fluid flowmeter of in-line calibration can be achieved.
Description
Technical field
The present invention relates to a kind of standard liquid flow calibration device, specifically a kind of vehicular oil flow standard dress
Put.
Background technology
Commonly used vehicular method of standard table and vehicle-mounted type volume pipe method oil flowmeter calibrating installation come in of the same trade at present
On-line testing is carried out, is mainly used to the calibrating to online oil flowmeter and calibration, it is adaptable to which relevant measurement verification department, enterprise count
The verification systems such as amount calibrating station, oil, chemical industry are especially right as flow Transfer Standards, detection, demarcation, the measuring equipment calibrated
In oil field, oil refining, chemical industry be indispensable indispensable calibrating means.Method of standard table oil flow calibrating device is with standard
Flowmeter, as the liquid flow standard device of standard metrology appliance, is the unified standard with transmission of flux unit value, is stream
Measure one of standard metering devices of magnitude tracing, transmission of quantity value and detection work of detection device；Volume tube method oil flow verification
Device is the liquid flow standard device using standard pipe prover as standard metrology appliance.Existing vehicular method of standard table oil
The uncertainty grade of flow calibrating device is 0.5% (k=2), and accuracy class is low；Volume tube method oil flow calibrating device then because
The limitation of range of flow and appearance and size for standard pipe prover, it is impossible to meet the inspection of oily flow on-line measurement when applying at the scene
Determine demand.
The content of the invention
Oil can not be met for vehicular method of standard table in the prior art and the oily flow calibrating device of vehicle-mounted type volume pipe method
The weak points such as meter proof accuracy requirement, realize that in-line calibration is high-precision the technical problem to be solved in the present invention is to provide one kind
Spend the vehicular Oil Flowmeter Standard Apparatus of liquid velocity formula flowmeter, volumetric flowmeter and mass flowmenter.
In order to solve the above technical problems, the technical solution adopted by the present invention is：
Vehicular Oil Flowmeter Standard Apparatus of the present invention, including truck, electronic scale, standard capacity measure, commutator, fuel reserve tank
And power source, wherein electronic scale, standard capacity measure, commutator, fuel reserve tank and power source is arranged on truck into sledge, electric
Sub- scale is fixed in skid body, electronic scale carrying standard capacity measure；The inlet of standard capacity measure passes through commutator and connection
Part is connected to the tested media through being detected flowmeter detection；The liquid outlet of standard capacity measure is connected to fuel reserve tank；Power source includes
Pneumatic and electronic two parts, wherein pneumatic part connect commutator, and the power supply of powered part is quoted from detection field power supply.
It is provided between electronic scale and standard capacity measure from weigher structure, it is described that there is hydraulic station from weigher structure, it is installed on sledge
On body, the piston rod apical grafting of hydraulic station oil cylinder is on standard capacity measure.
It is described to be from weigher structure：The standard capacity measure uses upper feed liquor or lower feed liquor mode, the feed liquor side under use
Install foam guiding tube in the water influent pipeline of formula additional, i.e., be located in water influent pipeline in standard capacity measure and through hole is provided with the tube wall of part.
The interface of the water influent pipeline installs oil tank snap joint.
The commutator uses pneumatic enclosed commutator.
In the front of standard capacity measure vehicle heading bar is guarded against provided with anticollision.
Antistatic aids is also equipped with to contact with ground.
The stabilier of liquid splash can be prevented by being installed additional inside standard capacity measure, and stabilier is two groups, every group of right-angled intersection,
Two components are upper and lower two gradients.
Two groups of stabiliers of upper and lower two gradients circumference in equal parts in the axial direction of standard capacity measure.
Plate of cooling down is installed additional in the crossover location upper end of upper stabilier.
The invention has the advantages that and advantage:
1. apparatus of the present invention can in-line calibration and calibration liquid velocity flowmeter, volumetric flowmeter and mass flow
Meter, is the extension of laboratory verification device, the calibration operation of oily flow instrument can not be dismantled online by solving, it is adaptable to relevant meter
The verification systems such as calibrating department, enterprise measurement calibrating station, oil, chemical industry are measured as flow Transfer Standards, detection, demarcation, calibration
Measuring equipment, be indispensable indispensable calibrating means especially for oil field, oil refining, chemical industry, uncertainty grade is：
Static mass method 0.05% (k=2)；Static Volumetric Method 0.1% (k=2).
2. package unit of the present invention is arranged on car body into sledge, contacted equipped with anti-static system with ground, skid body is equipped with liter
Descending mechanism, when running car operation Plays measuring device is left in electronic scale, electronic scale fixation and car body, it is ensured that in transport driving not
Shake.
3. having installed stabilier additional and plate of cooling down inside Plays metal tank of the present invention, simple in construction, concise in technology is saved
Material, processing cost is few, no maintenance cost, and the expansible flow velocity height, gas-liquid of being applied to strives road, reaction force greatly, easily flows
In big flow container and calibrating installation that body splashes, fluid state is set quickly to tend to be steady transition, installing stabilier additional can be effectively
Reduce measuring device in transportation because the factor such as jolting, shaking caused by deformation possibility, it is ensured that measuring device long-term safety is accurately counted
Amount.
4. the whole series calibrating installation design structure of the invention is rationally distributed, good appearance, advanced technology, automaticity height,
A whole set of calibration operation is all completed by computer in addition to snap joint is installed in connection.Design and processing cost it is not high, with compared with
High cost performance, user can obtain higher profit reciprocation with minimum investment.
5. the present invention is using the device expanded uncertainty of Static mass method：0.05% (k=2), than ever with other inspections
The data for determining method calibrating improve 10 double precisions, and the high-precision fluid flowmeter of in-line calibration can be achieved.
Brief description of the drawings
Fig. 1 is apparatus of the present invention overall structure front view；
Fig. 2 is Fig. 1 left view；
Fig. 3 is Fig. 1 top view；
Fig. 4 is the structural representation of stabilier and plate of cooling down in Plays metal tank of the present invention；
Fig. 5 is Plays metal tank inside top figure of the present invention.
In figure, 1 is truck, and 2 be electronic scale, and 3 be standard capacity measure, and 4 be fuel reserve tank, and 5 be that 6 be anticollision from weigher structure
Bar is guarded against, 7 be oil tank snap joint, and 8 be DNSD ready-packaged joints, and 9 be draining valve adapter, and 10 be draining valve, and 11 be composite joint
Flexible pipe, 12 be that, into flow line, 13 be oil return pipeline, and 14 be temperature transmitter, and 15 be liquid-level switch, and 16 be liquid level automatic reading
Device, 17 motorized adjustment ball valves, 18 be skid body, and 19 be commutator, and 20 be feed line, and 21 be wire spool, and 22 be oil well pump, 23
It is switch board for power gas source, 24,25 be power distribution cabinet, and 26 be electronic scale head (i.e. electronic scale display panel), and 27 be stabilier, 28
For plate of cooling down.
Embodiment
With reference to Figure of description, the present invention is further elaborated.
As shown in Figures 1 to 3, vehicular Oil Flowmeter Standard Apparatus of the present invention includes truck 1, electronic scale 2, standard capacity measure
3rd, commutator 19, fuel reserve tank 4 and power source, wherein electronic scale 2, standard capacity measure 3, commutator 19, fuel reserve tank 4 and dynamic
Power source is arranged on truck 1 into sledge, and electronic scale is fixed in skid body 18, the carrying standard capacity measure 3 of electronic scale 2；Standard metal
The inlet of measuring device 3 is connected to through being detected the tested media that flowmeter is detected by commutator 19 and connection member；Standard metal amount
The liquid outlet of device 3 is connected to fuel reserve tank 4 through oil return pipeline 13；Power source includes pneumatic and electronic two parts, and middle pneumatic part connects altogether
Commutator is connect, the power supply of powered part, quoted from detection field power supply, is power supply for electrical equipment.
As shown in Fig. 2 the present invention is installed additional outside measuring device from weigher structure 5, it is easy to the calibrating to electronic scale, reduction was transported
Influence of the journey to electronic scale；Install stabilier additional inside measuring device and plate of cooling down, prevent liquid splash, steady fluid makes metering more
Plus accurately and reliably.It is located at from weigher structure 5 between electronic scale 2 and standard capacity measure 3, can holds standard metal in running car
Device 3 departs from electronic scale 2, and described to use hydraulic type from weigher structure 5, with hydraulic station, the hydraulic station is installed in skid body 18, liquid
Four piston rod apical graftings of pressure station oil cylinder are on standard capacity measure, and hydraulic pump is using manually or electrically form.
In the present embodiment, using e=1/6000 high-precision electronics scale as the standard of Static mass method, using 3t high accuracy
Sai Duolisi electromagnetic force platform scales, i.e. maximum capacity 3000kg.
Standard capacity measure 3 is using standard of the secondary standard metal tank as Static Volumetric Method.Standard capacity measure 3
Design capacity is 3000L, and class of accuracy is second-class, the limits of error ± 0.025%, meets maximum stream flow 120m3/ h's
Calibrating is required.Standard capacity measure 3 is by metering neck, liquid level tube, metering neck scale, upper cone, cylinder, lower cone, discharge
Valve, support and leveling components etc. are constituted, and the surfaces externally and internally of standard capacity measure 3 is processed by shot blasting, is carried after Ageing Treatment
High product specification and service life.The feed liquor form of standard metal amount 3 uses upper feed liquor and lower feed liquor mode, in water influent pipeline
Install foam guiding tube additional, i.e., be located in water influent pipeline in standard capacity measure 3 on the tube wall of part and punch, increase fuel-displaced area to reduce
Oily foam, the foam guiding tube is welded in measuring device, the junction with water influent pipeline, and liquid can be reduced to greatest extent and produces frothing.
Use in view of standard capacity measure 3 belongs to open type flow, and tested media can be different degrees of in detection process
Ground produces various bubbles and flowed fluctuation, so as to cause measurement error and calibrating time delay occur, need to configure a set of be used for surely
Determine the system that fluid in standard measuring device is fluctuated, main function be the bubble that is produced for eliminating liquid in measuring device by flowed fluctuation with
Stream, with voltage stabilizing function of cooling down, control the flowed fluctuation of liquid stream in measuring device, it is stable within 0.2%, make the liquid of calibrating pipeline
Body fully meets the requirement of single-phase steady flow.As shown in Figures 4 and 5, the present embodiment is installed additional inside standard capacity measure to prevent
The stabilier 27 of liquid splash, stabilier 27 is two groups, every group of right-angled intersection, and two components are upper and lower two gradients, two groups of current stabilizations
The circumference in equal parts in the axial direction of standard capacity measure 3 of plate 27, and install plate 28 of cooling down additional in the crossover location upper end of upper stabilier.
Stabilier 27 is designed as groove profile, right-angled intersection, decile welding structure；Plate of cooling down sets 28 and is calculated as round belt grid of holes structure, selected
Material is stainless steel (304) material.
The operation principle of stabilier 27 and plate 28 of cooling down is to utilize the machines such as the interaction between gas-liquid separation, filtering and dividing plate
Reason, will enter liquid flow point in standard capacity measure 3 and dissipates isolation, drastically reduce flow velocity, bubble is decomposed rapidly, so that by liquid stream
Promptly stablize in a short time, it is ensured that the long-term safety of standard capacity measure 3 is accurately measured.
In the present embodiment, commutator 19 uses closed type pneumatic commutator, and piston driving structure, using stable, meets dress
Put the requirement to commutator.Its progressive error≤10ms that commutates, error is in the range of ± 0.02%, and operating pressure is in (0.4~0.6)
Between MPa.
The design capacity of fuel reserve tank 4 is 3m3, meet the requirement of standard measuring device lifting rate.
Standard capacity measure 3 is furnished with motorized adjustment ball valve 17, temperature transmitter 14, pressure transmitter (physical device user
Propose should not, but practical application must have), excess position limitation protection (i.e. liquid-level switch 15) and liquid level automatic reading device 16, wherein
Motorized adjustment ball valve 17 has 2, is separately mounted to feed tube and discharging tube (the i.e. standard capacity measure bottom of standard capacity measure 3
In the bypass in portion) on, the electric signal line of each element is connected to Control System of Microcomputer.
The present invention is additionally provided with the power distribution cabinet 25, the oil well pump 22 of anti-waterfall type, switch board 24, the Anti-breakage of explosion-proof type of explosion-proof type
Close and explosion stack, the 15min lifting rates that the selection of supporting explosion-proof oil well pump 22 meets fuel reserve tank 4 (i.e. need to be in the stipulated time 15
The medium in fuel reserve tank is discharged in minute), the present embodiment is from a self-suction oil pump.Electric wire overall installation is in located at truck
In explosion-proof power distribution cabinet 25, explosion proof control case 24, explosion stack on 1, with online tested flowmeter connect through API oil drain valves,
Specific complex connects flexible pipe 11 and component is quickly hinged with, and seals quick when being allowed to examine and determine, safe and reliable.Special joint and compound company
The static electricity resistance for connecing flexible pipe 11 meets national related requirement of explosion proof, it is ensured that it is safe and reliable that equipment is run.
For traffic safety, the present invention also guards against bar in the front of standard capacity measure vehicle heading provided with anticollision.
Liquid in-out mouthful is using electrically operated valve (explosion-proof), and performance is stable, and switch time is no more than 30s.Enter flowline and scene
The snap joint of connection, anti-static system, from weigher structure 5 and Control System of Microcomputer etc., be the online oily flow of complete set
Calibrating installation.The position that medium is examined and determine in process pipelines, standard capacity measure, commutator and the other contacts of package unit is used
Stainless steel (304) material, adpting flange uses GB9119 national standard flanges, and process pipe elbow radius is not less than 2R.It is all to be pressurized
Container and the specified interface unit pressing force 1.6MPa of control valve designs.
Truck can use light-duty dump truck, have the advantages that there is convenient disassembly.
The present invention technological process be：
Tested media is through tested flowmeter → oil drain valve → connection flexible pipe → flow control valve → liquid flowing valve → commutator
→ standard capacity measure (electronic scale) → draining valve → fuel reserve tank → oil pump or from head piece → discharge casing.
Apparatus of the present invention are mainly used to the calibrating to online oil flowmeter and calibration, are the extensions of laboratory verification device,
The calibration operation of oily flow instrument can not be dismantled online by solving, it is adaptable to stood about measurement verification department, enterprise measurement calibrating,
The verification systems such as oil, chemical industry are as flow Transfer Standards, detection, demarcation, the measuring equipment calibrated, especially for oil field, refining
Oil, chemical industry are indispensable indispensable calibrating means.
The key technical indexes of apparatus of the present invention：
1) calibration method：Static mass method+Static Volumetric Method
2) expanded uncertainty：
Static mass method：0.05% (k=2) electronic scale scale division value:E=1/6000
Static Volumetric Method：0.1% (k=2) standard measuring device degree of accuracy：0.025%
3) stability of flow degree：(0.2~0.5) %
4) range of flow：(3~120) m3/h
5) specification is examined and determine：DN(50-80)
6) operating pressure：(0.2—0.4)MPa
7) medium is examined and determine：Light oil
8) it is detected flowmeter species：Liquid capacity formula flowmeter, velocity flowmeter, mass flowmenter
9) it is detected flowmeter flow signal acquisition：Pulse signal, (4-20) mA, DC (1-5) V.
Claims (9)
1. a kind of vehicular Oil Flowmeter Standard Apparatus, it is characterised in that：Including truck, electronic scale, standard capacity measure, commutation
Device, fuel reserve tank and power source, wherein electronic scale, standard capacity measure, commutator, fuel reserve tank and power source are arranged on into sledge
On truck, electronic scale is fixed in skid body, electronic scale carrying standard capacity measure；The inlet of standard capacity measure passes through commutation
Device and connection member are connected to the tested media through being detected flowmeter detection；The liquid outlet of standard capacity measure is connected to fuel reserve tank；It is dynamic
Power source includes pneumatic and electronic two parts, wherein pneumatic part connection commutator, and the power supply of powered part is quoted from detection scene electricity
Source；The stabilier of liquid splash can be prevented by being installed additional inside standard capacity measure, and stabilier is two groups, every group of right-angled intersection, two groups
It is divided into upper and lower two gradients.
2. the vehicular Oil Flowmeter Standard Apparatus as described in claim 1, it is characterised in that：Electronic scale and standard capacity measure it
Between be provided with from weigher structure, it is described that there is hydraulic station from weigher structure, be installed in skid body, the piston rod apical grafting of hydraulic station oil cylinder is in mark
On metalloid measuring device.
3. the vehicular Oil Flowmeter Standard Apparatus as described in claim 2, it is characterised in that：It is described to be from weigher structure：The mark
Metalloid measuring device uses upper feed liquor or lower feed liquor mode, installs foam guiding tube additional in the water influent pipeline of feed liquor mode under use, that is, exists
The tube wall that water influent pipeline is located at part in standard capacity measure is provided with through hole.
4. the vehicular Oil Flowmeter Standard Apparatus as described in claim 3, it is characterised in that：The interface peace of the water influent pipeline
Charge of oil tank snap joint.
5. the vehicular Oil Flowmeter Standard Apparatus as described in claim 1, it is characterised in that：The commutator uses pneumatic enclosed
Commutator.
6. the vehicular Oil Flowmeter Standard Apparatus as described in claim 1, it is characterised in that：In standard capacity measure vehicle traveling
Bar is guarded against provided with anticollision in the front in direction.
7. the vehicular Oil Flowmeter Standard Apparatus as described in claim 1, it is characterised in that：It is also equipped with antistatic aids and ground
Contact.
8. the vehicular Oil Flowmeter Standard Apparatus as described in claim 1, it is characterised in that：Two groups of upper and lower two gradients are steady
Flow plate circumference in equal parts in the axial direction of standard capacity measure.
9. the vehicular Oil Flowmeter Standard Apparatus as described in claim 1, it is characterised in that：On the crossover location of upper stabilier
End installs plate of cooling down additional.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410393272.2A CN104132716B (en) | 2014-08-11 | 2014-08-11 | Vehicular Oil Flowmeter Standard Apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410393272.2A CN104132716B (en) | 2014-08-11 | 2014-08-11 | Vehicular Oil Flowmeter Standard Apparatus |
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| Publication Number | Publication Date |
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| CN104132716A CN104132716A (en) | 2014-11-05 |
| CN104132716B true CN104132716B (en) | 2017-08-04 |
Family
ID=51805487
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410393272.2A Active CN104132716B (en) | 2014-08-11 | 2014-08-11 | Vehicular Oil Flowmeter Standard Apparatus |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106768202B (en) * | 2016-12-28 | 2023-05-23 | 新乡航空工业(集团)有限公司 | Weighing oil discharging mechanism of micro flow standard device |
| CN107976223B (en) * | 2017-11-16 | 2019-07-16 | 哈尔滨工业大学 | A kind of high-precision leakage amount detector |
| CN108317723A (en) * | 2018-03-26 | 2018-07-24 | 宁波宝工电器有限公司 | A kind of fuel oil gear pump atomizer test device |
| CN111707325A (en) * | 2020-07-09 | 2020-09-25 | 广州能源检测研究院 | Method for calculating volume of bubbles and wall-mounted diesel oil flowing down |
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| CN2064047U (en) * | 1990-04-09 | 1990-10-17 | 中国石化销售公司华北公司 | High efficiency wagon-carried flow detecting standard apparatus |
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| CN202092741U (en) * | 2011-06-18 | 2011-12-28 | 新乡航空工业(集团)有限公司 | Vehicle-mounted liquid flow standard device |
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| CN103335693A (en) * | 2013-06-14 | 2013-10-02 | 北京聚雅科技有限公司 | Oil machine calibrating device using mass method |
| CN204165628U (en) * | 2014-08-11 | 2015-02-18 | 丹东意邦计量仪器仪表有限公司 | A kind of vehicular Oil Flowmeter Standard Apparatus |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7249530B2 (en) * | 2004-12-29 | 2007-07-31 | Caterpillar Inc. | Oil consumption simulating device |
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2014
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|---|---|---|---|---|
| CN2064047U (en) * | 1990-04-09 | 1990-10-17 | 中国石化销售公司华北公司 | High efficiency wagon-carried flow detecting standard apparatus |
| CN101556181A (en) * | 2009-05-20 | 2009-10-14 | 西安东风机电有限公司 | Composite static start-stop method mass flowmeter calibration system |
| CN202092741U (en) * | 2011-06-18 | 2011-12-28 | 新乡航空工业(集团)有限公司 | Vehicle-mounted liquid flow standard device |
| CN203203666U (en) * | 2013-04-11 | 2013-09-18 | 滁州扬子美家橱柜有限公司 | Metering verification and calibration device |
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| CN104132716A (en) | 2014-11-05 |
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| C06 | Publication | ||
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Effective date of registration: 20231211 Address after: 1-2 and half floors on the east side of Building 11, Phase III Standard Factory Building, Start-up Zone, Instrumentation Industry Base, Lingang Industrial Park, Dandong City, Liaoning Province, 118000 Patentee after: Dandong Qianjia Petroleum Equipment Technology Co.,Ltd. Address before: 118009 The second floor on the west side of Building 70-34 of the Instrument and Meter Industry Base in Dandong City, Liaoning Province Patentee before: DANDONG YIBANG MEASUREMENT INSTRUMENT CO.,LTD. |