CN209589219U - A kind of removable efficient combined-type Rotameter Calibrating Equipment - Google Patents
A kind of removable efficient combined-type Rotameter Calibrating Equipment Download PDFInfo
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- CN209589219U CN209589219U CN201920636749.3U CN201920636749U CN209589219U CN 209589219 U CN209589219 U CN 209589219U CN 201920636749 U CN201920636749 U CN 201920636749U CN 209589219 U CN209589219 U CN 209589219U
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Abstract
The utility model provides a kind of removable efficient combined-type Rotameter Calibrating Equipment, it includes suspended body flowmeter clamping table system and Weighing system, the suspended body flowmeter clamping table system is connected with the Weighing system, the suspended body flowmeter clamping table system includes inlet, the first calibrating pipeline and the second calibrating pipeline, in the first calibrating pipeline there is the first bore to be detected suspended body flowmeter, in the second calibrating pipeline there is the second bore to be detected suspended body flowmeter；The Weighing system includes liquid outlet；Realize that the combined type of Rotameter Calibrating Equipment and external device (ED) connects by inlet and liquid outlet.The utility model has many advantages, such as removable, convenient disassembly, Rapid Combination, and the uncertainty and discharge stability of combination unit can effectively meet laboratory and the on-site proving demand of suspended body flowmeter.
Description
Technical field
The utility model relates to a kind of calibrating installations, examine more particularly to a kind of removable efficient combined-type suspended body flowmeter
Determine device.
Background technique
Suspended body flowmeter is a kind of using simple, convenient reading instantaneous volume flow rate measuring instrumentss, is suitble to low flow velocity liquid
Small amount of flow measuring operating condition in the case of body flow measurement especially low reynolds number.Because its structure is simple, reliable operation, crushing are small
And stablize, can survey the advantages that low flow velocity medium, suspended body flowmeter is widely used in electric power, petrochemical industry, chemical industry, metallurgy, medicine, environment
In the Industry Controls and public utilities such as protection, sewage treatment.
Suspended body flowmeter working media flows from bottom to top, cannot be horizontally mounted.When examining and determine medium and scale medium difference
Need to carry out scale conversion and viscosity amendment.The Rotameter Calibrating Equipment of prior art mechanism and enterprise is special equipment,
Place occupies big and has a single function.The practical service environment item of tested suspended body flowmeter can not be simulated under laboratory condition
Part, to very accurately it is carried out calibrating have it is more highly difficult.Therefore, removable calibrating installation is studied, realizes tested flow
The Fast Installation and raising detection accuracy of meter are of great significance to the detection of suspended body flowmeter.
Utility model content
There is provided herein it is a set of it is removable, can examine and determine and fill with the suspended body flowmeter of any fluid flow device efficient combination
It sets, horizontal flow field quickly can be converted into the vertical flow field suitable for suspended body flowmeter calibrating, meet multi-parameter, more well
Specification, the suspended body flowmeter scene of various liquid-working-mediums and laboratory testing demand.
The utility model provides a kind of removable efficient combined-type Rotameter Calibrating Equipment comprising float-type
Meter clamping table system and Weighing system, the suspended body flowmeter clamping table system are connected with the Weighing system, the float
Flowmeter clamping table system includes inlet, the first calibrating pipeline and the second calibrating pipeline, has the in the first calibrating pipeline
One bore is detected suspended body flowmeter, in the second calibrating pipeline there is the second bore to be detected suspended body flowmeter；The Weighing system
Including liquid outlet；Realize that the combined type of Rotameter Calibrating Equipment and external device (ED) connects by inlet and liquid outlet.
Wherein, the suspended body flowmeter clamping table system and the Weighing system are connected by first flange and second flange
It connects.
Wherein, the first moveable platform and bracket, the suspended body flowmeter clamping table system are provided in the Weighing system
The second moveable platform and bracket are provided in system.
Wherein, first bore is detected a bore ruler of the suspended body flowmeter in DN50, DN40, DN32 bore
It is very little.
Wherein, second bore is detected a mouth in other bores of suspended body flowmeter selected from DN25 or less than DN25
Diameter size.
Wherein, the Weighing system further includes electronic commutator, high-precision electronic scale and weighing container.
Wherein, first moveable platform and bracket and the second moveable platform and bracket are cuboid framework.
It wherein, include at least two first detective tube line selection port valves in the first calibrating pipeline；In second inspection
Determine to include at least two second detective tube line selection port valves in pipeline.
Wherein, the external device (ED) is liquid flow standard device or other devices for being capable of providing regime flow.
Wherein, the liquid flow standard device includes water tank and water pump, frequency conversion speed-adjusting system, permanent flow container etc..
The utility model provides a kind of removable, convenient disassembly, Rapid Combination Rotameter Calibrating Equipment, can
Guarantee that measurement accuracy changes to/swap out progressive error and repeatability error using the reduction of electronic commutator, suspended body flowmeter is avoided to be pressed from both sides
It is broken, using the manual meter-clamping apparatus of clamping force overload alarm function.The uncertainty and discharge stability of combination unit can effectively expire
The laboratory of sufficient suspended body flowmeter and on-site proving demand.
Detailed description of the invention
Fig. 1 is the Rotameter Calibrating Equipment structural schematic diagram of the utility model；
Fig. 2 is the control section schematic diagram of the Rotameter Calibrating Equipment of the utility model；
Fig. 3 is the system schematic after Rotameter Calibrating Equipment is connected with liquid flow standard device.
Specific embodiment
The embodiments of the present invention are illustrated with reference to the accompanying drawing for the ease of understanding the utility model, it should
Understand, attached drawing is intended merely to schematically embody the design of utility model, and in different figures, unessential part gives province
Slightly, it is not meant to that the composed structure of device changes, it will be appreciated by those skilled in the art that following explanations is intended merely to
Convenient for being explained to utility model, and not as the specific restriction to its range.
Flow standard device is the effective means that flow instrument carries out that transmission of quantity value is completed in detection, is to guarantee flow instrument matter
The key link of amount.Flow standard device can be divided into Static mass method, Static Volumetric Method, dynamic mass method according to measurement method
With dynamic volume method.The Rotameter Calibrating Equipment of the utility model is Static mass method standard set-up.Static mass method stream
Amount standard set-up measuring principle is all to import and be placed in weighing mark the medium in certain time by flowmeter via commutator
In container on quasi- device, the quality of medium in container is measured then to obtain flowing through the mass of medium of flowmeter, then pass through survey
The amount time obtains mass flow.Mathematical model is shown in formula (1)
In formula: Q-accumulated quality flow, kg/s；
qm- instantaneous mass flow, kg/s；
Liquid quality indicating value in m-time of measuring in weighing container, kg；
T-time of measuring, s.
Suspended body flowmeter is widely used in small diameter tube, low flow velocity flow measurement field.By taking liquid as an example, the following glass of bore 10mm
The nominal caliber of glass pipe suspended body flowmeter full scale flow, flow velocity is between 0.2~0.6m/s, even lower than 0.1m/s.It is common
Suspended body flowmeter bore is DN15~DN50, and corresponding range of flow and class of accuracy are shown in Tables 1 and 2.
1 suspended body flowmeter of table often uses flow measurement range
2 suspended body flowmeter class of accuracy of table, the limits of error and return difference
Device design is carried out according to common flowmeter bore, class of accuracy and common flow measurement range, it is specific to design
Index is shown in Table 3.
3 device major design index of table
Fig. 1 show Rotameter Calibrating Equipment structural schematic diagram, and the Rotameter Calibrating Equipment includes float
Flowmeter clamping table system and Weighing system, the suspended body flowmeter clamping table system are connected with Weighing system.The layer, In
Have adjustment horizontal on first moveable platform and bracket 1 or the first machinery 4 of height-fine adjustment.The suspended body flowmeter dress
It is provided with the second moveable platform and bracket 15 in tong-test ammeter system, there is adjustment on second moveable platform and bracket 15
Horizontal or height-fine adjustment the second machinery 24.
It is preferred that the first moveable platform and bracket 1 and the second moveable platform and bracket 15 are cuboid framework, second
The middle part of moveable platform and bracket 15 is provided with work top, is equipped with horizontal ruler in the side of the work top, in order to
The level for guaranteeing the work top is provided with horizontality instruction bubble 27 on the work top.In support platform
The first eduction valve 25 for being provided with leak-off pipe and being connect with leak-off pipe.
The suspended body flowmeter clamping table system includes that inlet 22, first examines and determine pipeline and the second calibrating pipeline, wherein
The inlet 22 is connected with the first calibrating pipeline and the second calibrating pipeline, and the suspended body flowmeter clamping table system can pass through
Inlet 22 is connect with the pipeline of main fluid flow device.One end and inlet 22 of first calibrating pipeline and the second calibrating pipeline
Connection, the first calibrating pipeline are connected with the other end of the second calibrating pipeline with bus dump 31.
It include two the first detective tube line selection port valves 23 in the first calibrating pipeline, described two first calibrating pipelines
Sluice valve 23 is located at the two sides of the first calibrating pipeline, one of them first detective tube line selection port valve 23 is located at close to inlet
22 position, another the first detective tube line selection port valve 23 are located at close to the position of bus dump 31；In second detective tube
It include two the second detective tube line selection port valves 17 in line, described two second detective tube line selection port valves 17 are located at the second calibrating
The two sides of pipeline, one of them second detective tube line selection port valve 17 are located at close to the position of inlet 22, another second calibrating
Pipeline sluice valve 17 is located at close to the position of bus dump 31.
As shown in Figure 1, the inlet 22 is connected to the first detective tube line selection port valve 23 by examining and determine pipeline, in the inspection
Determine to be connected with lateral 16 on pipeline, the inlet 22 is connected in the second calibrating pipeline by the lateral 16
Second detective tube line selection port valve 17.
The first detective tube line selection port valve 23 is connected to the first bore by straight pipe 26 before the first calibrating pipeline and is detected
Suspended body flowmeter 28, wherein the first detective tube line selection port valve 23 is preferably DN50 detective tube line selection port valve；It is preferred that the first inspection
Straight pipe 26 is that DN50 examines and determine straight pipe before pipeline before determining pipeline；First bore is detected suspended body flowmeter 28 and can be selected from
A caliber size in DN50, DN40, DN32 bore.
The second detective tube line selection port valve 17 is connected to the second bore by straight pipe 18 before the second calibrating pipeline and is detected
Suspended body flowmeter 19, the second detective tube line selection port valve 17 are preferably DN25 detective tube line selection port valve；It is preferred that second inspection
Straight pipe 18 is that DN25 examines and determine straight pipe before pipeline before determining pipeline；It includes DN25 that second bore, which is detected suspended body flowmeter 19,
Or other bores less than DN25.
The first meter-clamping apparatus 30 is set on first calibrating pipeline, realize to the first bore be detected the installation of suspended body flowmeter 28 with
Disassembly, first meter-clamping apparatus 30 have lower flange leak-off pipe, which is connected with third eduction valve 29；First tong-test ammeter
Device 30 is manual form.
The second meter-clamping apparatus 21 is set on second calibrating pipeline, realize to the second bore be detected the installation of suspended body flowmeter 19 with
Disassembly, second meter-clamping apparatus 21 have lower flange leak-off pipe, which is connected with the second eduction valve 20；Second tong-test ammeter
Device 21 is manual form.
The bus dump 31 is connected to first flange 13, and float clamping table system is connected to by the first flange 13
Weighing system, the Weighing system include second flange 14, and the Weighing system is connected to float clamping by second flange 14
The first flange of table system, so that float clamping table system and the Weighing system are real by first flange 13 and second flange 14
Now connect.
First moveable platform of the Weighing system and the bottom of bracket 1 are equipped with 4 castors and 4 scalable stabilizer blades
Convenient for the movement and fixation of Weighing system.The lower part of the Weighing system is provided with work top, on the work top
Horizontality instruction bubble is installed.The Weighing system includes electronic commutator 10, high-precision electronic scale 6, weighing container 9
And liquid outlet 11.
The second flange 14 is connected to electronic commutator 10 by pipeline, and electronic commutator control precision is high and at the scene
It still can be used in the case where not having compressed air, it is selectable into weighing container that the electronic commutator 10 will test liquid
9 or enter commutator by-pass line 12, the commutation selection of electronic commutator 10 is realized in the triggering for passing through control signal.The commutation
Device by-pass line 12 is connected to liquid outlet 11, and the weighing container 9 is located on high-precision electronic scale 6, the high-precision electronic scale
6 can measure the liquid quality entered in the weighing container 9 by the electronic commutator 10.In the weighing container 9
Bottom be provided with drainage pipeline 7, be provided on the drainage pipeline 7 draining bottom valve 8, drainage pipeline 7 extends to and return water
The funnel 5 that pipeline 3 connects, the water return pipeline 3 are connected to liquid outlet 11 by quick mounting type flange 2.
The suspended body flowmeter clamping table system is arranged at least two verification table position, DN25 DN15, DN20 included below and
DN25 is a pipeline, and another is examined and determine pipeline for DN32, DN40 and DN50 suspended body flowmeter.By the way of converting pipeline section,
The calibrating from all caliber suspended body flowmeters of DN15~DN50 is covered on limited 2 platform positions.While one platform position work
Checklist can be installed in another position, effectively raise the calibrating efficiency of suspended body flowmeter.
First meter-clamping apparatus and the second meter-clamping apparatus have overload alarm, and the glass tube ratio of glass ball float flowmeter is easier to
It is broken, it especially without the suspended body flowmeter of guide frame, is often caught broken by pneumatic meter-clamping apparatus during clamping, using with clamping
The meter-clamping apparatus of power overload alarm function can solve this problem very well.Since the correct detection needs of suspended body flowmeter are vertical steady
Constant current field, it is stringent to import and export pipeline concentricity and compared with the verticality of work top requires, it need to guarantee tested flowmeter
Less than 2 °, this part can be realized gradient by adjusting work top level.
Fig. 2 is the control section schematic diagram of the Rotameter Calibrating Equipment of the utility model.As shown in Fig. 2, the control
System part mainly includes clamping force control system, commutator control system and weighing control system.For clamping force control system
For, the first meter-clamping apparatus and the second meter-clamping apparatus are connected, clamping force tester 1 and clamping force are installed respectively on each meter-clamping apparatus
Tester 2, preferably clamping force tester 1 and clamping force tester 2 are clamping force sensor, it is contemplated that tested glass tube float stream
Meter is easy to damage, when the clamping force of the first meter-clamping apparatus or the second meter-clamping apparatus is greater than prefabricated ceiling value, clamping 1 He of force tester
It clamps force tester 2 and transmits data-signal to PLC controller, carry out high limit alarm on the touchscreen by the PLC controller, lead to
Clamping force overload alarm is crossed, operator is prompted to stop stepping up to act, prevents detected instrument impaired.
First bore is detected suspended body flowmeter 28 and is connect by control line with PLC controller, Xiang Suoshu PLC controller
Transmit checklist signal 1；Second bore is detected suspended body flowmeter 19 and is connect by control line with PLC controller, Xiang Suoshu
PLC controller transmits checklist signal 2.
Commutator is the important component of fluid flow device, and uncertainty size integrally synthesizes device uncertain
Degree has larger impact, and the principal element for influencing commutator accuracy is the time caused by practical water injection time and triggering photosignal
Between error.
The utility model drives electronic commutator 10 to commutate using stepper motor, from PLC controller to stepper motor
Driver sends pulse, and control motor speed, acceleration and rotational angle pass through the high-speed pulse output channel of PLC, Xiang Huanxiang
The stepper motor driver of device sends pulse in the way of the even even deceleration of acceleration-constant speed-, and commutator machine is led with commutator
Fluid accelerate-at the uniform velocity-operation slowed down.The movement for accurately controlling electronic commutator 10, guarantees the uncertainty of device.
After system electrification, commutator is automatically switched into weighing and stops side, receives weighing enabled instruction, commutator commutation instruction set
Afterwards, it by accelerating-at the uniform velocity-to switch in the way of slowing down, tells pulse to stepper motor driver by PLC transmission, drives commutator
Motor commutation, when weigh start bit signal enabling when, system starts timing.After reaching when weighing the time substantially, commutator is changed
To instruction reset, the mode slowed down switches according still further to accelerating-at the uniform velocity-, tells pulse to stepper motor driver by PLC transmission,
Commutator machine commutation is driven, when the stop position signal WT002 that weighs starts, system stops timing, this time difference is to claim
The weight time.
The high-precision electronic scale 6 of device passes through 485 communication mode, and sensor reading is transmitted to PLC controller.Work as electricity
After sub- scale numerical stability, current value is read, the weighing time measured with commutator carries out division arithmetic.Current system can be measured
The integrated flow of system, is compared with flow meter signal, obtains the meter proof data.PLC controller and draining bottom valve 8 connect
It connects, bottom valve start-up and shut-down control relay output signal is provided.
Fig. 3 is the system schematic after Rotameter Calibrating Equipment is connected with liquid flow standard device.Such as Fig. 3 institute
Show, combination unit includes water tank and water pump, frequency conversion speed-adjusting system, permanent flow container and Rotameter Calibrating Equipment etc..In
Installation triple valve and reserved bypass before and after water flow device pipeline section, realize water flow in test pipeline and bypass by control triple valve
Between switching, one section of triple valve respectively by the entering of hose and removable Rotameter Calibrating Equipment, export and be connected, it is logical
It crosses inlet and liquid outlet realizes that the combined type of Rotameter Calibrating Equipment and external device (ED) connects, form suspended body flowmeter inspection
Determine circuit, the external device (ED) is preferably liquid flow standard device, other devices that can provide regime flow can also.Float stream
Meter calibrating installation and liquid flow standard device connect into efficient combination device, and horizontal flow field is converted into be suitble to float-type
Count the vertical flow field of calibrating.
Rotameter Calibrating Equipment is not known according to JJG164-2000 liquid flow standard device vertification regulation
Degree evaluation.Partial uncertainty mainly includes timer, weighing apparatus and commutator.The utility model is made using water flow standard apparatus
For device power water source, uncertainty evaluation is carried out to Rotameter Calibrating Equipment.Commutator is each in water flow standard apparatus
It is extremely crucial in component part, suitable specific gravity is occupied in whole device uncertainty, is the main of whole device uncertainty
/ swapping out the to form difference and change to/repeatability error that swaps out that source generally changes to commutator is as the main of evaluation commutator performance
Index.Each partial uncertainty evaluation result of Rotameter Calibrating Equipment is shown in Table 4 and table 5
4 Rotameter Calibrating Equipment uncertainty evaluation of table
Note: a- timer crystal oscillator stability is generally below the 1/10 of device uncertainty
5 Rotameter Calibrating Equipment uncertainty summary table of table
Note: b-u=(s1 2+s2 2+s5 2+s6 2+u1 2+u2 2+u4 2+uF 2)1/2
C-U=k*u k=2
DN25 platform position u=0.118%
DN50 platform position u=0.127%
The Composite Seismogram u=0.127% for device is maximized according to JJG164-2000
The expanded uncertainty U=k*u=2*0.127%=0.254% ≈ 0.26% of device
The expanded uncertainty of Rotameter Calibrating Equipment should be better than the 1/2 of the tested flowmeter limits of error.It is floating
Subflow meter highest class of accuracy is 1.0 grades, and the limits of error are ± 1.0%, therefore the extension combined the unit is uncertain
Degree should be better than 0.5%.The Rotameter Calibrating Equipment expanded uncertainty of development is 0.26%, meets highest level float
Flow verification requirement.
Discharge stability is to measure the working conditions such as liquid flow standard device liquid source, pipeline resistor to keep at any time
Stable performance index, is the important parameter for evaluating fluid flow device metering performance, and the superiority and inferiority of the index directly affects float
The result of flowmeter error test.It is carried out under maximum stream flow and minimum discharge respectively according to each position JJG164-2000 each
Discharge stability is examined and determine between accumulated time.
Continuous measurement n (n >=10) secondary flow q2i(i=1,2 ..., n)
Average value
Stability
Flow average value is calculated according to formula (2) and (3) and stability, each flow point discharge stability verification result are shown in Table
6.The discharge stability of combination unit is 0.28%, illustrates that device has good discharge stability
6 device discharge stability verification result of table
The utility model uses electric numerically-controlled commutator topology, and solving device is not at the scene in application, due to having compression
The problem of air, bring commutation Weighing system is not available；Using have clamping force overload alarm function manual meter-clamping apparatus,
It solves the problem of often to be caught broken by pneumatic meter-clamping apparatus during glass tube suspended body flowmeter clamps；Solve a variety of working medias
The test problems of suspended body flowmeter.
The device of the utility model can include the company of the devices such as water flow, oil stream amount, high slime body flow with any type
It is logical, realize various suspended body flowmeters include glass ball float flowmeter, metal floater flowmeter and plastic float flowmeter etc.
Line detection, no scale conversion and viscosity amendment；Improve detection efficiency.The device of the utility model has 2 checklist platforms of design
There are respective switch valve and flow control valve in position, each position, independently of each other, are independent of each other, in one flowmeter of detection
The checklist of another position can be replaced simultaneously.
The utility model provides a kind of removable, convenient disassembly, Rapid Combination Rotameter Calibrating Equipment, to protect
Card measurement accuracy changes to/swaps out progressive error and repeatability error using the reduction of electronic commutator, to avoid suspended body flowmeter from being pressed from both sides
Broken addition clamping force warning function.The experimental results showed that the uncertainty and discharge stability of combination unit can effectively meet
The laboratory of DN15~DN50 suspended body flowmeter and on-site proving demand.
Although above-described embodiment is not it is understood that the utility model has been disclosed in the preferred embodiments as above
To limit the utility model.For any person skilled in the art, the utility model technical side is not being departed from
Under case ambit, many possible variations all are made to technical solutions of the utility model using the technology contents of the disclosure above
And modification or equivalent example modified to equivalent change.Therefore, all contents without departing from technical solutions of the utility model,
According to the technical essence of the utility model any simple modifications, equivalents, and modifications made to the above embodiment, still belong to
In the range of technical solutions of the utility model protection.
Claims (10)
1. a kind of removable efficient combined-type Rotameter Calibrating Equipment comprising suspended body flowmeter clamping table system and weighing
System, the suspended body flowmeter clamping table system are connected with the Weighing system, it is characterised in that: the suspended body flowmeter dress
Tong-test ammeter system includes inlet, the first calibrating pipeline and the second calibrating pipeline, has the first bore quilt in the first calibrating pipeline
Suspended body flowmeter is examined, in the second calibrating pipeline there is the second bore to be detected suspended body flowmeter；The Weighing system includes liquid
Mouthful；Realize that the combined type of Rotameter Calibrating Equipment and external device (ED) connects by inlet and liquid outlet.
2. removable efficient combined-type Rotameter Calibrating Equipment as described in claim 1, it is characterised in that: the float
Flowmeter clamping table system is connect with the Weighing system by first flange and second flange.
3. removable efficient combined-type Rotameter Calibrating Equipment as described in claim 1, it is characterised in that: the weighing
It is provided with the first moveable platform and bracket in system, it is removable flat that second is provided in the suspended body flowmeter clamping table system
Platform and bracket.
4. removable efficient combined-type Rotameter Calibrating Equipment as described in claim 1, it is characterised in that: described first
Bore is detected a caliber size of the suspended body flowmeter in DN50, DN40, DN32 bore.
5. removable efficient combined-type Rotameter Calibrating Equipment as described in claim 1, it is characterised in that: described second
Bore is detected a caliber size in other bores of suspended body flowmeter selected from DN25 or less than DN25.
6. removable efficient combined-type Rotameter Calibrating Equipment as described in claim 1, it is characterised in that: the weighing
System further includes electronic commutator, high-precision electronic scale and weighing container.
7. removable efficient combined-type Rotameter Calibrating Equipment as claimed in claim 3, it is characterised in that: described first
Moveable platform and bracket and the second moveable platform and bracket are cuboid framework.
8. removable efficient combined-type Rotameter Calibrating Equipment as described in claim 1, it is characterised in that: described the
It include at least two first detective tube line selection port valves in one calibrating pipeline；It include at least two the in the second calibrating pipeline
Two detective tube line selection port valves.
9. removable efficient combined-type Rotameter Calibrating Equipment as described in claim 1, it is characterised in that: the outside
Device is liquid flow standard device or other devices for being capable of providing regime flow.
10. removable efficient combined-type Rotameter Calibrating Equipment as claimed in claim 9, it is characterised in that: the liquid
Body flow standard device includes water tank and water pump, frequency conversion speed-adjusting system, permanent flow container etc..
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920636749.3U CN209589219U (en) | 2019-05-06 | 2019-05-06 | A kind of removable efficient combined-type Rotameter Calibrating Equipment |
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|---|---|---|---|
| CN201920636749.3U CN209589219U (en) | 2019-05-06 | 2019-05-06 | A kind of removable efficient combined-type Rotameter Calibrating Equipment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110108337A (en) * | 2019-05-06 | 2019-08-09 | 北京市计量检测科学研究院 | A kind of removable efficient combined-type Rotameter Calibrating Equipment |
| CN110864770A (en) * | 2019-11-20 | 2020-03-06 | 威海坤科流量仪表股份有限公司 | Gas waist wheel starting flow testing equipment and testing method thereof |
-
2019
- 2019-05-06 CN CN201920636749.3U patent/CN209589219U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110108337A (en) * | 2019-05-06 | 2019-08-09 | 北京市计量检测科学研究院 | A kind of removable efficient combined-type Rotameter Calibrating Equipment |
| CN110864770A (en) * | 2019-11-20 | 2020-03-06 | 威海坤科流量仪表股份有限公司 | Gas waist wheel starting flow testing equipment and testing method thereof |
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