CN105372099B - A kind of sampler and method measuring the distribution of multiphase flow containing rate - Google Patents
A kind of sampler and method measuring the distribution of multiphase flow containing rate Download PDFInfo
- Publication number
- CN105372099B CN105372099B CN201510931458.3A CN201510931458A CN105372099B CN 105372099 B CN105372099 B CN 105372099B CN 201510931458 A CN201510931458 A CN 201510931458A CN 105372099 B CN105372099 B CN 105372099B
- Authority
- CN
- China
- Prior art keywords
- probe tube
- end probe
- adjustment sheet
- sampler
- tube
- 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.)
- Active
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
- G01N1/20—Devices for withdrawing samples in the liquid or fluent state for flowing or falling materials
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The present invention provides a kind of samplers and method of the distribution of measurement multiphase flow containing rate, the sampler includes front end probe tube, the connecting tube that can freely turn to, rear end probe tube and the adjuster for adjusting front end probe tube nozzle direction, the front end probe tube is connected by connecting tube with rear end probe tube, the adjuster includes adjusting rod and the adjustment sheet mounted on adjusting rod one end, and the other end of the adjusting rod is connected with front end probe tube；When adjustment sheet force unbalance in the fluid of multiphase flow, the adjustment sheet drives the rotation of front end probe tube under the action of out-of-balance force by adjusting rod, until adjustment sheet stress balance, the nozzle face multiphase flow direction of flow of front end probe tube at this time.The sampler can realize the flow direction of measurement point fluid adaptive, automatic sensing sample point fluid flow direction, and adjust automatically nozzle is towards to face incoming, to improve the accuracy of sampling and measuring.
Description
Technical field
The invention belongs to physical measuring device technical field more particularly to a kind of samplings measuring the distribution of multiphase flow containing rate
Device and method.
Background technology
In industrial multiphase chemical reactor, often there is flowing, mixing, dispersion, transmission and reaction of different phase etc.
Process.Dispersion particle (bubble, drop or solid particle) concentration distribution is that reflection inside reactor characteristic is most direct, most effective
One of parameter, be heterophase reactor analysis, type selecting and Design enlargement important evidence.
At present to the measurement of bubble, drop and solid particulate distributions in multiphase flow, most common means are to be based on light reflection
Optical fiber probe method and conductance (capacitance) sonde method based on conductance, the above method is in the measurement of gas-liquid and liquid-solid two-phase system
Obtain many successful applications.But when existing simultaneously multiple dispersed phases, for example, gas liquid particle three phase system is there are bubble and admittedly
Often phase content is higher for the dispersed phase of two kinds of high phase contents of body particle, especially industrial system, bubble and solid when reality measures
The sampled signal " crowded " of particle is difficult to differentiate together, to seriously affect the accuracy of measurement result.In addition, also ultrasonic wave
Fault imaging, gamma ray fault imaging, electron tomography imaging technique etc., their maximum advantages are Noninvasives, but price
Expensive and space-time resolution factor still needs to improve.Sampling method is the more original and traditional detection method of heterogeneous system, due to it is simple,
Direct and result is relatively reliable and is applied widely in Local effect modificat8 detection.The key of sampling method be isokinetic sampling or
Equal momentum sampling (isokinetic sampling), i.e. flow condition inside and outside probe tube are identical.Accomplish isokinetic sampling, it is first
Sample tap face direction of flow is first needed, will appear larger error if deviateing direction of flow.Institute widely used at present
" the tangential sampling method " of meaning is only applicable to the better simply flowing that can be prejudged and substantially flow to, and is often flowed in heterophase reactor
Dynamic complexity, can not predict the flow direction of sample point, therefore can seriously affect the accuracy of sampling result.
Invention content
In view of the deficiencies of the prior art, the purpose of the present invention is to provide a kind of samplings of measurement multiphase flow containing rate distribution
Device and method, the sampler can automatic sensing sample point fluid flow direction, and adjust automatically nozzle comes towards to face
Stream, to improve the accuracy of sampling and measuring.
For this purpose, the present invention uses following technical scheme：
One of the objects of the present invention is to provide a kind of sampler of measurement multiphase flow containing rate distribution, the sampler packets
Include front end probe tube, the connecting tube that can freely turn to, rear end probe tube and the tune for adjusting front end probe tube nozzle direction
Device is saved, the front end probe tube is connected by connecting tube with rear end probe tube, and the adjuster includes adjusting rod and is mounted on tune
The other end of the adjustment sheet of pole one end, the adjusting rod is connected with front end probe tube；When the adjustment sheet is in the stream of multiphase flow
In body when force unbalance, the adjustment sheet drives the rotation of front end probe tube under the action of out-of-balance force by adjusting rod, directly
To adjustment sheet stress balance, the nozzle face multiphase flow direction of flow of front end probe tube at this time.
The connecting tube includes hose and spring, and the internal diameter of the spring is more than the outer diameter of hose, and the spring is placed on soft
Outside pipe.
Preferably, the material of the hose is rubber.
The number of the adjustment sheet is 4 multiple, and is not 0, and the spacing between the adjustment sheet is identical.
Preferably, the adjusting plate shape on adjusting rod is identical.
Preferably, the material of the adjusting rod is metal or organic glass.
The shape of the adjustment sheet is triangle or trapezoidal.
The ratio of the long side length of the adjustment sheet face incoming and the internal diameter size of front end probe tube is 0.8-1.2.
The front end probe tube and rear end probe tube are cylindrical tube.
Preferably, the material of the front end probe tube and rear end probe tube is metal or organic glass.
The draw ratio of the cylindrical forward probe tube is 1-2.
The front end probe tube is identical with the internal diameter of rear end probe tube.
Angle between the front end probe tube and rear end probe tube is 60-120 °.
The second object of the present invention is that providing a kind of utilization sampler as described above measures the distribution of multiphase flow containing rate
Method, the measurement method is：The front end probe tube and adjuster of sampler are put into multiphase flow reactor, and are dipped in more
Phase flow liquid face is hereinafter, keep rear end probe tube vertical, and when front end, probe tube no longer rotates, sampling measures phase content.
Compared with prior art, beneficial effects of the present invention are：
The sampler provided by the invention for measuring multiphase flow containing rate can realize certainly the flow direction of measurement point fluid
Adaptation, automatic sensing sample point fluid flow direction, and adjust automatically nozzle direction are to face incoming, to improve sampling and measuring
Accuracy.
The method provided by the invention that the distribution of multiphase flow containing rate is measured using sampler as described above is simple, easily grasps
Make.
Description of the drawings
Fig. 1 is the structural schematic diagram of the sampler for the measurement multiphase flow containing rate distribution that embodiment 1 provides.
Wherein：1, front end probe tube；2, adjustment sheet；3, spring；4, hose；5, rear end probe tube；6, adjusting rod.
Fig. 2 is that the liquid that embodiment 2 obtains consolidates local solid holdup distribution in stirred tank.
Wherein：A is PC-6a solid concentration measuring instrument measurement results；B is common probe tube measurement result (nozzle is horizontal)；c
For sampler measurement result described in embodiment 1.
Fig. 3 is gas holdup distribution in the gas-liquid agitation slot of the acquisition of embodiment 3.
Wherein：A is conducting probe measurement result；B is common probe tube measurement result (nozzle is horizontal)；C is 1 institute of embodiment
State sampler measurement result.
Fig. 4 is solid holdup distribution map in the gas-liquid-solid stirred tank of the acquisition of embodiment 4.
Fig. 5 is gas holdup distribution map in the gas-liquid-solid stirred tank of the acquisition of embodiment 4.
Specific implementation mode
Technical solution to further illustrate the present invention below with reference to the accompanying drawings and specific embodiments.
A kind of sampler measuring the distribution of multiphase flow containing rate, the sampler include front end probe tube 1, can freely turn
To connecting tube, rear end probe tube 5 and adjuster for adjusting 1 nozzle direction of front end probe tube, the front end probe tube 1 is logical
Connecting tube to be crossed with rear end probe tube 5 to be connected, the adjuster includes adjusting rod 6 and the adjustment sheet 2 mounted on 6 one end of adjusting rod,
The other end of the adjusting rod 6 is connected with front end probe tube 1；When the adjustment sheet 2 in the fluid of multiphase flow force unbalance
When, the adjustment sheet 2 under the action of out-of-balance force by adjusting rod 6 drive front end probe tube 1 rotate, until adjustment sheet 2 by
Dynamic balance, at this time the nozzle face multiphase flow direction of flow of front end probe tube 1.
Sampler provided by the invention, when fluid is when coming to front end probe tube 1 at a certain angle of cut, fluid is to adjuster
Adjustment sheet 2 generate pressure, since the pressure experienced everywhere in adjustment sheet 2 is unequal, perpendicular to adjustment sheet 2 pressure generate pressure
Torque makes front end probe tube 1 rotate, until the nozzle of front end probe tube 1 just comes against fluid to since adjustment sheet 2 is each
A direction stress balance, front end probe tube 1 are just stablized in the orientation.
The connecting tube includes hose 4 and spring 3, and the internal diameter of the spring 3 is more than the outer diameter of hose 4,3 sets of the spring
Outside hose 4.The connecting tube can be rotated according to the rotation of front end probe tube 1.
Preferably, the material of the hose 4 is rubber.
The number of the adjustment sheet 2 is 4 multiple, and is not 0, if the number of adjustment sheet 2 is 8,12,14 or 20
A etc., the spacing between the adjustment sheet 2 is identical.
Preferably, the adjusting plate shape on adjusting rod is identical.
Preferably, the material of the adjusting rod 6 is metal or organic glass.
The shape of the adjustment sheet 2 is triangle or trapezoidal.
The ratio of the length of the long side of 2 face incoming of the adjustment sheet and the internal diameter size of front end probe tube 1 is 0.8-
1.2, such as 0.9,1.0,1.1 or 1.2.
The front end probe tube 1 and rear end probe tube 5 are cylindrical tube.
Preferably, the material of the front end probe tube 1 and rear end probe tube 5 is metal or organic glass.
The draw ratio of the cylindrical forward probe tube 1 is 1-2, such as 1.1,1.2,1.3,1.5,1.8 or 1.9.
The front end probe tube 1 is identical with the internal diameter of rear end probe tube 5.
Angle between the front end probe tube 1 and rear end probe tube 5 is 60-120 °, such as 65 °, 70 °, 75 °, 80 °,
85 °, 90 °, 100 °, 105 ° or 115 ° etc..
The method for measuring the distribution of multiphase flow containing rate using sampler as described above, the measurement method are：It will sampling
The front end probe tube 1 and adjuster of device are put into multiphase flow reactor, and are dipped in multiphase flow liquid level hereinafter, keeping rear end probe tube
5 is vertical, and when front end probe tube 1 no longer rotates, sampling measures phase content.
Embodiment 1
A kind of sampler measuring the distribution of multiphase flow containing rate, as shown in Figure 1.The sampler include front end probe tube 1,
Connecting tube, rear end probe tube 5 and the adjuster for adjusting 1 nozzle direction of front end probe tube that can freely turn to, before described
End probe tube 1 is connected by connecting tube with rear end probe tube 5, and the adjuster includes adjusting rod 6 and mounted on 6 one end of adjusting rod
Adjustment sheet 2, the other end of the adjusting rod 6 is connected with front end probe tube 1, and the number of the adjustment sheet 2 is four, adjustment sheet
Spacing between 2 is identical, and the shape of the adjustment sheet 2 is trapezoidal, and the side of the trapezoidal face incoming is two parallel edges.
The front end probe tube 1 of the sampler is lucite tube material, internal diameter 6mm, wall thickness 1mm, length of tube
For 16mm；6 long 8mm of the adjusting rod；Connecting tube includes rubber hose 4 and stainless steel spring 3, and the internal diameter of rubber hose 4 is
6mm, wall thickness 1mm, internal diameter 9mm, connection length of tube are 10mm；Rear end probe tube 5 be internal diameter be 6mm, wall thickness is the stainless of 1mm
The pipe range of steel pipe, rear end probe tube 5 is 300mm.
Sample rate is controlled using peristaltic pump, solid holdup obtains solid masses percentage, and gas holdup using bottle method
Then directly volume is read from sampling bottle scale contain rate.
Embodiment 2
Liquid, which is measured, using sampler described in embodiment 1 consolidates the local solid phase content in stirred tank reactor.
Experiment is carried out in the organic glass stirred tank of diameter T=380mm, experimental system be quartz sand (200 mesh) and
Deionized water, average solid holdup are 5wt% (mass ratio)；Standby fluid level height H=T, 22 DEG C of liquidus temperature；Agitating paddle is 45 °
Six hinged joint of down-push type opens vane wheel oar, and paddle diameter D=T/3, paddle is from bottom height C=T/3, elliptical slot bottom, long axis and short axle it
Than being 2:1；Using stirred tank ellipse bottom center minimum point as coordinate origin, using sampler described in embodiment 1, (r/ is measured
R, z/H) solid holdup on=(0.8,0.34) position, wherein r/R and z/H indicates respectively using stirred tank bottom centre as origin,
Radial and axial position, R are the radius for stirring trench bottom, and r is the distance that stirred tank central axes are arrived at the place of sample position, z
Liquid level at where sample position, and the tradition horizontal positioned with solid concentration measuring instrument PC-6a and sampling nozzle
Sampler measurement result compares, and the results are shown in Figure 2, and sampler of the invention obtains the survey closer to PC-6a
Measure result.
Embodiment 3
The local gas phase content in gas-liquid agitation slot reactor is measured using sampler described in embodiment 1.
Experiment is carried out in the flat organic glass stirred tank of diameter T=380mm, and experimental system is air and deionization
Water；Standby fluid level height H=T, 22 DEG C of liquidus temperature；Agitating paddle is standard Rushton paddles, and paddle diameter D=T/3, paddle is from bottom height
Spend C=T/3；Using stirred tank ellipse bottom center minimum point as coordinate origin, gas-liquid is measured using sampler described in embodiment 1
Gas holdup on the position of (r/R, z/H)=(0.8,0.34) in stirred tank, and be horizontally arranged with conducting probe and sampling nozzle
Traditional sampler measurement result compares, and the results are shown in Figure 3, and sampler of the invention is obtained closer to conductance
The measurement result of probe.
Embodiment 4
Using sampler described in embodiment 1 measure gas-liquid-solid stirred tank reactor in local gas phase and solid phase contain
Rate.
Experiment is carried out in the organic glass stirred tank of diameter T=380mm, and experimental system is air, quartz sand (200
Mesh) and deionized water, averagely solid holdup is 5wt% (mass ratio)；Standby fluid level height H=T, 22 DEG C of liquidus temperature；Agitating paddle
Vane wheel oars are opened for 45 ° of six hinged joints of down-push type, and paddle diameter D=T/3, paddle is from bottom height C=T/3, elliptical slot bottom, long axis and short
The ratio between axis is 2:1；Using stirred tank ellipse bottom center minimum point as coordinate origin, using sampler described in embodiment 1, survey respectively
The distribution of solid holdup and gas holdup radially on 4 axial heights is measured, as a result as shown in Figures 4 and 5, it can be seen from the figure that adopting
Successfully measure gas holdup in three-phase stirring slot and solid holdup distribution with the sampler, measurement result with to gas-liquid-solid stirred tank
Qualitative understanding be consistent.
Applicant states, the foregoing is merely the specific implementation mode of the present invention, but protection scope of the present invention not office
It is limited to this, person of ordinary skill in the field is it will be clearly understood that any belong to those skilled in the art and taken off in the present invention
In the technical scope of dew, the change or replacement that can be readily occurred in are all fallen within protection scope of the present invention and the open scope.
Claims (10)
1. a kind of sampler measuring the distribution of multiphase flow containing rate, which is characterized in that the sampler includes front end probe tube
（1）, can freely turn to connecting tube, rear end probe tube（5）With for adjusting front end probe tube（1）The adjusting in nozzle direction
Device, the front end probe tube（1）Pass through connecting tube and rear end probe tube（5）It is connected, the adjuster includes adjusting rod（6）And peace
Mounted in adjusting rod（6）The adjustment sheet of one end（2）, the adjusting rod（6）The other end and front end probe tube（1）It is connected；When described
Adjustment sheet（2）In the fluid of multiphase flow when force unbalance, the adjustment sheet（2）Pass through adjusting under the action of out-of-balance force
Bar（6）Drive front end probe tube（1）Rotation, until adjustment sheet（2）Stress balance, at this time front end probe tube（1）Nozzle face
Multiphase flow direction of flow；
The connecting tube includes hose（4）And spring（3）, the spring（3）Internal diameter be more than hose（4）Outer diameter, the bullet
Spring（3）It is placed on hose（4）It is external；
The adjustment sheet（2）The long side length of face incoming and front end probe tube（1）Internal diameter size ratio be 0.8-1.2；
The front end probe tube（1）With rear end probe tube（5）It is cylindrical tube；
The front end probe tube（1）Draw ratio be 1-2.
2. sampler according to claim 1, which is characterized in that the hose（4）Material be rubber.
3. sampler according to claim 1 or 2, which is characterized in that the adjustment sheet（2）Number be 4 multiple, and
It is not 0, the adjustment sheet（2）Between spacing it is identical.
4. sampler according to claim 1, which is characterized in that described to be mounted on adjusting rod（6）On adjustment sheet（2）Shape
Shape is identical.
5. sampler according to claim 1, which is characterized in that the adjusting rod（6）Material be metal or organic glass
Glass.
6. sampler according to claim 1, which is characterized in that the adjustment sheet（2）Shape be triangle or trapezoidal.
7. sampler according to claim 1, which is characterized in that the front end probe tube（1）With rear end probe tube（5）'s
Material is metal or organic glass.
8. sampler according to claim 1, which is characterized in that the front end probe tube（1）With rear end probe tube（5）'s
Internal diameter is identical.
9. sampler according to claim 1, which is characterized in that the front end probe tube（1）With rear end probe tube（5）It
Between angle be 60-120 °.
10. the method for measuring the distribution of multiphase flow containing rate using the sampler described in one of claim 1-9, which is characterized in that
The measurement method is：By the front end probe tube of sampler（1）And adjuster is put into multiphase flow reactor, and it is dipped in determinand
In, keep rear end probe tube（5）Vertically, front end probe tube is waited for（1）When no longer rotating, sampling measures phase content distribution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510931458.3A CN105372099B (en) | 2015-12-15 | 2015-12-15 | A kind of sampler and method measuring the distribution of multiphase flow containing rate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510931458.3A CN105372099B (en) | 2015-12-15 | 2015-12-15 | A kind of sampler and method measuring the distribution of multiphase flow containing rate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105372099A CN105372099A (en) | 2016-03-02 |
| CN105372099B true CN105372099B (en) | 2018-09-25 |
Family
ID=55374497
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510931458.3A Active CN105372099B (en) | 2015-12-15 | 2015-12-15 | A kind of sampler and method measuring the distribution of multiphase flow containing rate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105372099B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112461605A (en) * | 2020-09-27 | 2021-03-09 | 山东大学 | Universal time sequence vector submarine sediment catcher and catching method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2087338U (en) * | 1991-04-05 | 1991-10-23 | 荀建国 | Static-pressure-balance constant-speed smoke-sampling tube |
| US5154087A (en) * | 1990-01-29 | 1992-10-13 | Intersystems, Inc. | Sampler apparatus |
| CN201615848U (en) * | 2010-02-09 | 2010-10-27 | 中国气象局乌鲁木齐沙漠气象研究所 | Full-automatic and high-precision sand-dust collector |
| CN103063474A (en) * | 2012-08-23 | 2013-04-24 | 浙江省海洋开发研究院 | Shallow water quality sampler |
| CN104614205A (en) * | 2015-01-30 | 2015-05-13 | 浙江大学 | Dust constant-speed sampling device for vertical sampling |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140260694A1 (en) * | 2013-03-15 | 2014-09-18 | Chevron U.S.A. Inc. | Automated Tracer Sampling and Measurement System |
-
2015
- 2015-12-15 CN CN201510931458.3A patent/CN105372099B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5154087A (en) * | 1990-01-29 | 1992-10-13 | Intersystems, Inc. | Sampler apparatus |
| CN2087338U (en) * | 1991-04-05 | 1991-10-23 | 荀建国 | Static-pressure-balance constant-speed smoke-sampling tube |
| CN201615848U (en) * | 2010-02-09 | 2010-10-27 | 中国气象局乌鲁木齐沙漠气象研究所 | Full-automatic and high-precision sand-dust collector |
| CN103063474A (en) * | 2012-08-23 | 2013-04-24 | 浙江省海洋开发研究院 | Shallow water quality sampler |
| CN104614205A (en) * | 2015-01-30 | 2015-05-13 | 浙江大学 | Dust constant-speed sampling device for vertical sampling |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105372099A (en) | 2016-03-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN208846095U (en) | A kind of corrosive pipeline locating and detecting device | |
| CN107121168B (en) | A kind of probe of ultrasonic flowmeter and ultrasonic flowmeter comprising the probe | |
| CN105372099B (en) | A kind of sampler and method measuring the distribution of multiphase flow containing rate | |
| CN101403675B (en) | Novel mixed concrete viscosity measuring instrument | |
| CN207248294U (en) | A kind of guide wave radar liquid level gauge | |
| CN206990019U (en) | A kind of probe of ultrasonic flowmeter and the ultrasonic flowmeter comprising the probe | |
| Ohl et al. | The second normal stress difference for pure and highly filled viscoelastic fluids | |
| CN209102716U (en) | A kind of soil pollution detection device | |
| CN204514402U (en) | A kind of differential pressure mass flowmeter for vortex street | |
| CN209541827U (en) | A kind of novel ultrasonic wave flowmeter | |
| CN106512893B (en) | A kind of easily observation, multiduty stirring reactor device | |
| Hongguang et al. | Study on the oil quantities calculation method of coriolis mass flow meter in oil dynamic measurement | |
| CN105841755B (en) | A kind of modified optic fibre turbo flowmeter | |
| CN209878046U (en) | Oil-water two-phase flow real-time measuring device based on power rotating spiral flow technology | |
| CN101514995A (en) | Method for detecting rotate speed of flooding point of mixing kettle | |
| CN208780595U (en) | Suspended matter detection device | |
| CN109632554B (en) | Liquid distribution detection device and method for rotary packed bed | |
| CN202421068U (en) | Rotary turbidity detector | |
| CN106706468A (en) | Vibrating tube type on-line densimeter | |
| CN210786937U (en) | Stirring device for realizing temperature measurement in rod | |
| CN207907956U (en) | A kind of air flow rate detecting device | |
| CN215312061U (en) | Medical science detects liquid feeding diluter | |
| CN220356594U (en) | Dynamic metering device for oil products | |
| CN206832614U (en) | Vibration tube-type on-line densimeter | |
| CN211717529U (en) | Coriolis flowmeter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |