CN206959916U - Orifice flowmeter - Google Patents
Orifice flowmeter Download PDFInfo
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- CN206959916U CN206959916U CN201720807266.6U CN201720807266U CN206959916U CN 206959916 U CN206959916 U CN 206959916U CN 201720807266 U CN201720807266 U CN 201720807266U CN 206959916 U CN206959916 U CN 206959916U
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Abstract
The utility model embodiment provides a kind of orifice flowmeter.The utility model orifice flowmeter, the orifice flowmeter also include：Two air-liquid converters and two liquid guiding tubes；Described two air-liquid converters are separately positioned in a pressure tappings；One end of each air-liquid converter is provided with diaphragm, and the other end connects a liquid guiding tube, and the liquid guiding tube is connected with the pressure transmitter；Each air-liquid converter is used to liquid filling the air-liquid converter and the liquid guiding tube being connected with the air-liquid converter, contacted by the diaphragm with the gas to be measured in the pipeline, air pressure is converted into hydraulic pressure, and transmitted by the liquid guiding tube to the pressure transmitter, the pressure transmitter determines the pressure differential of described two air-liquid converters, and the flow of the gas to be measured in the pipeline is determined according to the pressure differential.The utility model embodiment can avoid influence of the temperature to accuracy of measurement, lift the Stability and veracity of measurement result.
Description
Technical field
The present embodiments relate to mechanical technique, more particularly to a kind of orifice flowmeter.
Background technology
Flowmeter is used for the flow for measuring air in pipeline or liquid, is widely used in the fields such as petrochemical industry.Flowmeter
Species have a lot, for example, gear meter, electromagnetic flowmeter and orifice flowmeter etc..Orifice flowmeter is by gauge orifice
The high range ratio of plate and multi-parameter differential pressure transmitter (such as differential pressure transmitter, temperature transmitter and pressure transmitter) supporting composition is poor
Press flow apparatus, measurable gas, steam, the flow of liquid and natural gas.
Wherein, orifice flowmeter can include orifice plate and pressure transmitter, and orifice plate is set in the duct, when full of pipeline
During fluid flow through orifices plate, local contraction will be produced, a fluid stream is concentrated, and flow velocity increase, static pressure is reduced, and one is produced before and after orifice plate
Static pressure is poor, and the pressure guiding pipe for connecting pressure transmitter is connected to orifice plate both sides, pressure transmitter according to the flowing principle of continuity and
Bernoulli equation can derive the relation between pressure differential and flow and try to achieve flow.
However, when temperature is relatively low, such as winter, during using orifice flow measuring gas flow, measure gas
Body condenses in the pressure guiding pipe of orifice flowmeter, influences the degree of accuracy of measurement, causes orifice flowmeter measurement result to jump when serious
Become.
The content of the invention
The embodiment of the present invention provides a kind of orifice flowmeter, can avoid influence of the temperature to accuracy of measurement, and lifting is surveyed
Measure the Stability and veracity of result.
The embodiment of the present invention provides a kind of orifice flowmeter, the orifice flowmeter include pressure transmitter, orifice plate and with
Two ring flanges of pipeline connection, described two ring flanges are separately positioned on the both sides of the orifice plate, for fixing the orifice plate,
So that the gas to be measured in pipeline flows through the perforate of the orifice plate, the pressure tappings of radial direction, institute are provided with each ring flange
Stating orifice flowmeter also includes：Two air-liquid converters and two liquid guiding tubes；
Described two air-liquid converters are separately positioned in a pressure tappings；
One end of each air-liquid converter is provided with diaphragm, and the other end connects a liquid guiding tube, the liquid guiding tube with
The pressure transmitter connection；
Each air-liquid converter is used to liquid is filled into the air-liquid converter and with what the air-liquid converter was connected drawn
Liquid pipe, contacted by the diaphragm with the gas to be measured in the pipeline, air pressure is converted into hydraulic pressure, and draw liquid by described
Pipe is transmitted to the pressure transmitter, and the pressure transmitter determines the pressure differential of described two air-liquid converters, according to described
Pressure differential determines the flow of the gas to be measured in the pipeline.
Optionally, each air-liquid converter includes air-liquid converter body, air cavity, the diaphragm, sap cavity, guiding fluid hole and filling
Liquid device；
Each air-liquid converter body is connected with a pressure tappings；
One end of each air-liquid converter is disposed with air cavity and sap cavity, is set between the air cavity and the sap cavity
There is the diaphragm, the sap cavity also connects with the guiding fluid hole；
The guiding fluid hole connects with the liquid guiding tube and the liquid filling device, and the liquid filling device is used to liquid filling institute
Sap cavity, the guiding fluid hole and the liquid guiding tube are stated, sealing function is played to the liquid.
Optionally, the converter through hole of radial direction is provided with each air-liquid converter body, the through hole draws liquid with described
The aperture of one end of hole connection is less than the other end of the through hole, and the liquid filling device is arranged in the through hole, the liquid filling
Device includes spring, steel ball, hollow plug and big plug；
One end of the spring is connected with the hole wall of the converter through hole, and the other end is connected with the steel ball；
The end face of the hollow plug is circular arc, and the end face and the same curvature of the steel ball, the end face and institute
The contact of steel ball face is stated, the hollow plug is additionally provided with liquid injection hole；
The other end of the hollow plug contacts with the big plug；
The big plug is arranged in the side wall of the air-liquid converter body.
Optionally, the hollow plug is connected with the converter through hole whorl.
Optionally, the big plug is connected with the converter through hole whorl.
Optionally, the air-liquid converter also includes pressure ring, and the pressure ring is threadedly coupled with the air-liquid converter body,
For the diaphragm to be fixed between the air cavity and the sap cavity.
Optionally, the pressure ring is additionally provided with seal groove with one end that the pressure tappings connect, and the air-liquid converter is also
Including sealing ring, the sealing ring is used for the sealing for ensuring the air-liquid converter body and the pressure tappings.
Optionally, each liquid guiding tube welds with the air-liquid converter.
Optionally, it is provided with pad between the end face of the orifice plate and the ring flange.
Optionally, the diaphragm is metal material.
Orifice flowmeter of the embodiment of the present invention, by setting two air-liquid converters and two liquid guiding tubes, described two gas
Liquid converter is separately positioned in a pressure tappings, and one end of each air-liquid converter is provided with diaphragm, and the other end connects one
The liquid guiding tube, the liquid guiding tube are connected with the pressure transmitter, and each air-liquid converter is used to liquid filling the gas
Liquid converter and the liquid guiding tube being connected with the air-liquid converter, connect by the diaphragm and the gas to be measured in the pipeline
Touch, air pressure is converted into hydraulic pressure, and transmitted by the liquid guiding tube to the pressure transmitter, the pressure transmitter and determine institute
The pressure differential of two air-liquid converters is stated, the flow of the gas to be measured in the pipeline is determined according to the pressure differential.In reality
During existing flow measurement, air pressure is converted into hydraulic pressure and measured, influence of the temperature to accuracy of measurement can be avoided, lifted
The Stability and veracity of measurement result.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are this hairs
Some bright embodiments, for those of ordinary skill in the art, without having to pay creative labor, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is the structural representation of orifice flowmeter embodiment one of the present invention；
Fig. 2 is the structural representation of the air-liquid converter 41 of orifice flowmeter of the present invention；
Fig. 3 is the structural representation of the air-liquid converter 42 of orifice flowmeter of the present invention.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
Part of the embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art
The every other embodiment obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
Fig. 1 is the structural representation of orifice flowmeter embodiment one of the present invention, as shown in figure 1, the orifice plate stream of the present embodiment
Gauge can include：Pressure transmitter 1, orifice plate 2, two ring flanges (31 and 32), two air-liquid converters being connected with pipeline
(41 and 42) and two liquid guiding tubes (51 and 52), described two ring flanges (31 and 32) are separately positioned on the both sides of the orifice plate 2,
For fixing the orifice plate 2 so that the gas to be measured in pipeline flows through the perforate of the orifice plate, each ring flange (31 and 32)
On be provided with the pressure tappings (311,321) of radial direction, air-liquid converter 41 is arranged in pressure tappings 311, and air-liquid converter 42 is set
Put in pressure tappings 321, one end of air-liquid converter 41 is provided with diaphragm 411, and liquid is drawn in the other end connection of air-liquid converter 41
Pipe 51, one end of air-liquid converter 42 are provided with diaphragm 421, and the other end connection liquid guiding tube 52 of air-liquid converter 42, two are drawn
Liquid pipe (51,52) is connected with pressure transmitter 1 respectively.
Air-liquid converter 41 is used to liquid filling air-liquid converter 41 and the liquid guiding tube 51 being connected with air-liquid converter 41,
Contacted by diaphragm 411 with the gas to be measured in pipeline, air pressure is converted into hydraulic pressure, and transmit to pressure by liquid guiding tube 51
Transmitter 1.
Air-liquid converter 42 is used to liquid filling air-liquid converter 42 and the liquid guiding tube 52 being connected with air-liquid converter 42,
Contacted by diaphragm 421 with the gas to be measured in pipeline, air pressure is converted into hydraulic pressure, and transmit to pressure by liquid guiding tube 52
Transmitter 1.
Pressure transmitter 1 determines the pressure differential Δ P of two air-liquid converters (41 and 42), true according to the pressure differential Δ P
The flow of gas to be measured in the fixed pipeline.
Above-mentioned ring flange 31 can also be referred to as upstream flange disk, and ring flange 32 can be referred to as downstream flange disk.It is to be measured
Measure gas and upstream flange disk is passed through by upstream flange disk, orifice plate, downstream flange disk, gas to be measured by upstream line successively
Pressure tappings 311 contacted with diaphragm 411, contacted by the pressure tappings 321 of downstream flange disk with diaphragm 421, promote diaphragm (411,
421), diaphragm (411,421) deforms under the gas pressure of gas to be measured, and the diaphragm of deformation changes air-liquid converter
The volume of middle liquid, air pressure is converted into hydraulic pressure, the liquid guiding tube that hydraulic pressure process can bear high pressure leads to pressure transmitter 1, pressure
Transmitter 1 measures the differential pressure Δ P of upstream flange disk and downstream flange disk, is then converted to flow output.
Wherein, pressure transmitter 1 can be with as shown in figure 1, there is a display screen, the output flow registration on the display screen.
Specifically, pressure transmitter can determine the flow of the gas to be measured in pipeline according to following formula (1).
Wherein, C is efflux coefficient, and d is the opening diameter of condition of work orifice plate, and D is in upstream line under condition of work
Footpath, qmFor mass flow, unit Kg/s, qvFor volume flow, unit m3/ s, β are diameter ratio, and ρ is the density of fluid, single
Position is Kg/m3。
Optionally, above-mentioned orifice plate 2 is metal material, circular strip handle, and there is a circular port centre, i.e., the perforate of above-mentioned orifice plate,
The aperture of the perforate along gas flow to be measured from large to small.Above-mentioned orifice plate 2 is specifically as follows standard orifice plate.Further, also
Pad can be set between orifice plate 2 and the end face of ring flange 31 and ring flange 32, to further enhance sealing.
Optionally, above-mentioned diaphragm (411 and 421) can be waveform, metal material, and diaphragm can be under relatively low dynamics
Produce deformation.And diaphragm can be changed, so as to increase the service life of the orifice flowmeter of the embodiment of the present invention.
Optionally, liquid guiding tube 51 welds with air-liquid converter 41, and liquid guiding tube 52 welds with air-liquid converter 42.Specifically
Welding manner can be to be welded in the space of the upper perforate of the outer wall and air-liquid converter of liquid guiding tube, so as to ensure liquid
Body does not leak under a certain pressure.It should be understood that other connected modes can also be used between liquid guiding tube and air-liquid converter,
Such as cutting ferrule connects.Differ herein one for example, the embodiment of the present invention not in this, as limitation.
The orifice flowmeter of the present embodiment, by setting two air-liquid converters and two liquid guiding tubes, described two gas-liquids
Converter is separately positioned in a pressure tappings, and one end of each air-liquid converter is provided with diaphragm, and the other end connects an institute
Liquid guiding tube is stated, the liquid guiding tube is connected with the pressure transmitter, and each air-liquid converter is used to liquid filling the gas-liquid
Converter and the liquid guiding tube being connected with the air-liquid converter, connect by the diaphragm and the gas to be measured in the pipeline
Touch, air pressure is converted into hydraulic pressure, and transmitted by the liquid guiding tube to the pressure transmitter, the pressure transmitter and determine institute
The pressure differential of two air-liquid converters is stated, the flow of the gas to be measured in the pipeline is determined according to the pressure differential.In reality
During existing flow measurement, air pressure is converted into hydraulic pressure and measured, it is possible to prevente effectively from influence of the temperature to accuracy of measurement,
Lift the Stability and veracity of measurement result.
Fig. 2 is the structural representation of the air-liquid converter 41 of orifice flowmeter of the present invention, as shown in Fig. 2 the present embodiment
Air-liquid converter 41 can specifically include：Air-liquid converter body 412, air cavity 413, diaphragm 411, sap cavity 414, guiding fluid hole 415
With liquid filling device 416.
Wherein, air-liquid converter body 412 is connected with the pressure tappings 311 shown in Fig. 1, one end of air-liquid converter 41 according to
It is secondary to be provided with air cavity 413 and sap cavity 414, diaphragm 411 is provided between air cavity 413 and sap cavity 414, sap cavity 414 is also with drawing liquid
Hole 415 connects.
Guiding fluid hole 415 connects with liquid guiding tube 51 and liquid filling device 416, and liquid filling device 416 is used to liquid filling the liquid
Chamber 414, the guiding fluid hole 415 and the liquid guiding tube 51, sealing function is played to the liquid.
Specifically, air cavity 413 connects with pressure tappings 311, the spiral shell of pressure tappings 311 shown in air-liquid converter body 412 and Fig. 1
Line connects, and air-liquid converter body 412 can be specifically cylinder, and one end of air-liquid converter body 412 is provided with air cavity
413, gas to be measured enters air cavity 413 by pressure tappings 311, power is acted to diaphragm 411 in air cavity 413, to be measured
Measure diaphragm 411 under the gas pressure of gas to deform, the diaphragm of deformation changes the volume of liquid in air-liquid converter 41, will
Air pressure is converted to hydraulic pressure, and the liquid guiding tube 51 that hydraulic pressure process can bear high pressure leads to pressure transmitter 1, and pressure transmitter 1 is by upstream
The differential pressure Δ P of ring flange and downstream flange disk is measured, and is then converted to flow output.Wherein, the diameter of air cavity 413 can be with
More than the diameter of pressure tappings 311.
Optionally, be provided with the converter through hole 417 of radial direction on air-liquid converter body 412, the through hole 417 with it is described
The aperture of one end that guiding fluid hole 415 connects is less than the other end of the through hole 417, and the liquid filling device 416 is arranged on described logical
In hole, the liquid filling device 416 can specifically include spring 4161, steel ball 4162, hollow plug 4163 and big plug 4164.
One end of the spring 4161 is connected with the hole wall of the converter through hole 417, and the other end is connected with the steel ball 4162.It is described
The end face of hollow plug 4163 is circular arc, and the end face and the 4162 same curvature of steel ball, the end face and the steel
Pearl face is contacted, and the hollow plug 4163 is additionally provided with liquid injection hole, and the other end of the hollow plug 4163 is blocked up greatly with described
First 4164 contact.The big plug 4164 is arranged in the side wall of the air-liquid converter body 412.Wherein, big plug 4164
Section can specifically be illustrated in figure 2 T-shaped, one end of big plug 4164 is threadedly coupled with through hole 417, big plug 4164 it is another
One end is fastened in the side wall of air-liquid converter body 412, so as on the basis of realizing removably, it is ensured that liquid does not leak outside.
Wherein, the hollow plug 4163 can also be threadedly coupled with the converter through hole 417.
The orifice flowmeter of the embodiment of the present invention has liquid filling function, and liquid filling is more convenient, and the specific present invention is implemented
The orifice flowmeter of example realizes that the method for liquid filling is：Dismantle after big plug 4164, grease gun can be used to carry out liquid filling, in feed liquor
When, liquid is entered by the liquid injection hole of hollow plug 4163, and promotes steel ball 4162 to move horizontally, and liquid enters converter through hole
471 enter guiding fluid hole 415, liquid guiding tube 51 and sap cavity 414.When guiding fluid hole 415, liquid guiding tube 51 and sap cavity 414 fill liquid
When, stopping fluid injection, steel ball 4162 contacts under the active force of spring 4161 with hollow plug 4163, so as to prevent liquid leakage,
It is poorly sealed in order to prevent, big plug 4164 is installed after the completion of liquid filling.
Optionally, the air-liquid converter 41 can also include pressure ring 418, the pressure ring 418 and the air-liquid converter
Body 412 is threadedly coupled, for the diaphragm 411 to be fixed between the air cavity 413 and the sap cavity 414.
Optionally, the pressure ring 418 is additionally provided with seal groove with one end that the pressure tappings 311 connect, and the gas-liquid turns
Parallel operation 41 can also include sealing ring 419, and the sealing ring 419 is used to ensure that the air-liquid converter body 412 takes with described
Press the sealing of mouth 311.
The orifice flowmeter of the present embodiment, by setting two air-liquid converters and two liquid guiding tubes, described two gas-liquids
Converter is separately positioned in a pressure tappings, and one end of each air-liquid converter is provided with diaphragm, and the other end connects an institute
Liquid guiding tube is stated, the liquid guiding tube is connected with the pressure transmitter, and each air-liquid converter is used to liquid filling the gas-liquid
Converter and the liquid guiding tube being connected with the air-liquid converter, connect by the diaphragm and the gas to be measured in the pipeline
Touch, air pressure is converted into hydraulic pressure, and transmitted by the liquid guiding tube to the pressure transmitter, the pressure transmitter and determine institute
The pressure differential of two air-liquid converters is stated, the flow of the gas to be measured in the pipeline is determined according to the pressure differential.In reality
During existing flow measurement, air pressure is converted into hydraulic pressure and measured, it is possible to prevente effectively from influence of the temperature to accuracy of measurement,
Lift the Stability and veracity of measurement result.
Further, by setting the liquid filling device being detachably connected to realize the flexibility of orifice flowmeter liquid filling.
Fig. 3 is the structural representation of the air-liquid converter 42 of orifice flowmeter of the present invention, as shown in figure 3, the present embodiment
Air-liquid converter 42 can specifically include：Air-liquid converter body 422, air cavity 423, diaphragm 421, sap cavity 424, guiding fluid hole 425
With liquid filling device 426.
And the converter through hole 427 of radial direction is provided with air-liquid converter body 422, the through hole 427 with it is described
The aperture of one end that guiding fluid hole 425 connects is less than the other end of the through hole 427, and the liquid filling device 426 is arranged on described logical
In hole, the liquid filling device 426 can specifically include spring 4261, steel ball 4262, hollow plug 4263 and big plug 4264.
And the air-liquid converter 42 can also include pressure ring 428 and sealing ring 429.
The structure of above-mentioned air-liquid converter 42 is identical with the structure of the air-liquid converter 41 of embodiment illustrated in fig. 2, and its is specific
Connected mode, realization principle and technique effect may refer to the specific explanations explanation of embodiment illustrated in fig. 2, and here is omitted.
Finally it should be noted that：Various embodiments above is merely illustrative of the technical solution of the present invention, rather than its limitations；To the greatest extent
The present invention is described in detail with reference to foregoing embodiments for pipe, it will be understood by those within the art that：Its according to
The technical scheme described in foregoing embodiments can so be modified, either which part or all technical characteristic are entered
Row equivalent substitution；And these modifications or replacement, the essence of appropriate technical solution is departed from various embodiments of the present invention technology
The scope of scheme.
Claims (9)
1. a kind of orifice flowmeter, the orifice flowmeter includes pressure transmitter, orifice plate and two flanges being connected with pipeline
Disk, described two ring flanges are separately positioned on the both sides of the orifice plate, for fixing the orifice plate so as to be measured in pipeline
Gas flows through the perforate of the orifice plate, and the pressure tappings of radial direction are provided with each ring flange, it is characterised in that the orifice plate stream
Gauge also includes：Two air-liquid converters and two liquid guiding tubes；
Described two air-liquid converters are separately positioned in a pressure tappings；
One end of each air-liquid converter is provided with diaphragm, and the other end connects a liquid guiding tube, the liquid guiding tube with it is described
Pressure transmitter connects；
Each air-liquid converter is used to liquid filling the air-liquid converter and the liquid guiding tube being connected with the air-liquid converter,
Contacted by the diaphragm with the gas to be measured in the pipeline, air pressure is converted into hydraulic pressure, and pass by the liquid guiding tube
The pressure transmitter is transported to, the pressure transmitter determines the pressure differential of described two air-liquid converters, according to the pressure
Difference determines the flow of the gas to be measured in the pipeline；
Each air-liquid converter includes air-liquid converter body, air cavity, the diaphragm, sap cavity, guiding fluid hole and liquid filling device；
Each air-liquid converter body is connected with a pressure tappings；
One end of each air-liquid converter is disposed with air cavity and sap cavity, is set between the air cavity and the sap cavity
Diaphragm is stated, the sap cavity also connects with the guiding fluid hole；
The guiding fluid hole connects with the liquid guiding tube and the liquid filling device, and the liquid filling device is used to liquid filling the liquid
Chamber, the guiding fluid hole and the liquid guiding tube, sealing function is played to the liquid.
2. orifice flowmeter according to claim 1, it is characterised in that be provided with radially on each air-liquid converter body
Converter through hole, the aperture of one end that the through hole connects with the guiding fluid hole is less than the other end of the through hole, the filling
Liquid device is arranged in the through hole, and the liquid filling device includes spring, steel ball, hollow plug and big plug；
One end of the spring is connected with the hole wall of the converter through hole, and the other end is connected with the steel ball；
The end face of the hollow plug is circular arc, and the end face and the same curvature of the steel ball, the end face and the steel
Pearl face contacts, and the hollow plug is additionally provided with liquid injection hole；
The other end of the hollow plug contacts with the big plug；
The big plug is arranged in the side wall of the air-liquid converter body.
3. orifice flowmeter according to claim 2, it is characterised in that the hollow plug and the converter through hole spiral shell
Line connects.
4. orifice flowmeter according to claim 2, it is characterised in that the big plug and the converter through hole whorl
Connection.
5. orifice flowmeter according to claim 2, it is characterised in that the air-liquid converter also includes pressure ring, described
Pressure ring is threadedly coupled with the air-liquid converter body, for the diaphragm to be fixed between the air cavity and the sap cavity.
6. orifice flowmeter according to claim 5, it is characterised in that one end that the pressure ring connects with the pressure tappings
Seal groove is additionally provided with, the air-liquid converter also includes sealing ring, and the sealing ring is used to ensure the air-liquid converter sheet
The sealing of body and the pressure tappings.
7. according to the orifice flowmeter described in any one of claim 1 to 6, it is characterised in that each liquid guiding tube and the gas-liquid
Converter welds.
8. according to the orifice flowmeter described in any one of claim 1 to 6, it is characterised in that the orifice plate and the ring flange
End face between be provided with pad.
9. according to the orifice flowmeter described in any one of claim 1 to 6, it is characterised in that the diaphragm is metal material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720807266.6U CN206959916U (en) | 2017-07-05 | 2017-07-05 | Orifice flowmeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720807266.6U CN206959916U (en) | 2017-07-05 | 2017-07-05 | Orifice flowmeter |
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| Publication Number | Publication Date |
|---|---|
| CN206959916U true CN206959916U (en) | 2018-02-02 |
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ID=61384102
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| CN201720807266.6U Active CN206959916U (en) | 2017-07-05 | 2017-07-05 | Orifice flowmeter |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107270981A (en) * | 2017-07-05 | 2017-10-20 | 中国石油天然气股份有限公司 | Orifice flowmeter |
| CN109596182A (en) * | 2018-11-06 | 2019-04-09 | 上海库科自动化科技有限公司 | A kind of non-transformer uses integrated differential-pressure-type flow meter on the spot |
| CN111024170A (en) * | 2019-12-18 | 2020-04-17 | 沈阳鼓风机集团股份有限公司 | Orifice flowmeter |
-
2017
- 2017-07-05 CN CN201720807266.6U patent/CN206959916U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107270981A (en) * | 2017-07-05 | 2017-10-20 | 中国石油天然气股份有限公司 | Orifice flowmeter |
| CN109596182A (en) * | 2018-11-06 | 2019-04-09 | 上海库科自动化科技有限公司 | A kind of non-transformer uses integrated differential-pressure-type flow meter on the spot |
| CN111024170A (en) * | 2019-12-18 | 2020-04-17 | 沈阳鼓风机集团股份有限公司 | Orifice flowmeter |
| CN111024170B (en) * | 2019-12-18 | 2021-09-14 | 沈阳鼓风机集团股份有限公司 | Orifice flowmeter |
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