CN208187473U - A kind of hot type flux of vortex street metering device and flowmeter - Google Patents
A kind of hot type flux of vortex street metering device and flowmeter Download PDFInfo
- Publication number
- CN208187473U CN208187473U CN201820749647.8U CN201820749647U CN208187473U CN 208187473 U CN208187473 U CN 208187473U CN 201820749647 U CN201820749647 U CN 201820749647U CN 208187473 U CN208187473 U CN 208187473U
- Authority
- CN
- China
- Prior art keywords
- vortex
- hot type
- vortex street
- sensor
- type flux
- 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
Landscapes
- Measuring Volume Flow (AREA)
Abstract
The utility model discloses a kind of hot type flux of vortex street metering device and flowmeters, flow measurement device includes measurement pipeline, it further include the vortex generating body for making fluid generation rule vortex street, the generating body is located in measurement pipeline, the eddy generator is equipped with the flow channel passed through for fluid, the sensor for detecting vortex street frequency is equipped in the flow channel, the sensor is thermoelectric transducer；Also disclose a kind of vortex-shedding meter equipped with above-mentioned hot type flux of vortex street metering device.The utility model provides a kind of flow measurement device of strong antijamming capability, this flow measurement device and its measurement method, the flow for determining fluid is changed by detection vortex signal bring temperature rule, in flowmeter installation without carrying out the amendment of temperature and pressure to it, shortening the set-up time and being suitable for more mounting locations.
Description
Technical field
The utility model relates to field of flow measurement, specially a kind of hot type flux of vortex street metering device and flowmeter.
Background technique
Vortex-shedding meter is the body of measurement gas, steam or the liquid researched and produced according to toll bar (Karman) vortex street principle
Product flow marks the volume flow of condition or the volume flowmeter of mass flow.The flow for being mainly used for industrial pipeline medium fluid is surveyed
Amount, such as a variety of media of gas, liquid, steam.
Fig. 4 show the basic schematic diagram of vortex-shedding meter, and vortex generator as shown in Fig. 4 is located at measurement pipeline 1
Middle part, fluid flows through eddy generator 2, in the well-regulated whirlpool of the generation of the two sides of eddy generator 2 alternately, whirlpool
Frequency is directly proportional to the flow velocity of fluid.Be arranged in 2 downstream of eddy generator piezoelectric transducer 5 detect vortex street frequency to
The flow value of fluid is calculated.The vortex-shedding meter of traditional sensing techniques, have crushing it is low, without movable member, structure is simple,
The advantages that low cost, but in actual measurement, there are following deficiencies:
1, the range of traditional vortex-shedding meter is 1:20, wherein piezo-electric crystal exists using piezo-electric crystal as sensor
It is small by the vortex street of sensor when flow is too small if the flow velocity of fluid is less than 5m/s in the measurement process of vortex street frequency
To being difficult to capture, traditional vortex-shedding meter can not be measured.
2, traditional vortex-shedding meter during the installation process requires the straight pipe of flowmeter upstream high, and when installation may not have
Standby mounting condition, limits the application of vortex-shedding meter in many occasions.
3, the sensor in vortex-shedding meter is fixedly mounted on the downstream of cylindrical vortex generating body, when measurement pipeline is along pipe
When axial vibration occurs for road, with the fluid in pipeline relative motion can occur for the sensor in pipeline under the drive of pipeline, this
When piezo-electric crystal relative motion can be mistaken for flow signal, influence the measuring accuracy of flowmeter.
Utility model content
The purpose of this utility model is to provide for a kind of hot type flux of vortex street metering device and flowmeter discloses one kind
Range ratio is big, strong antijamming capability flowmeter, and the flow measurement device and flowmeter pass through detection vortex signal bring temperature
Metric rule changes the flow for determining fluid, in flowmeter installation without carrying out the amendment of temperature and pressure to it, shortens installation
Time and be suitable for more mounting locations.
In order to reach above-mentioned purpose of utility model, the utility model uses a kind of following technical scheme: hot type vortex street stream
Metering device, including measurement pipeline are measured, further includes the eddy generator for making fluid generation rule vortex signal to be measured, institute
It states eddy generator to be located in measurement pipeline, the eddy generator is equipped with the flow channel passed through for fluid, the stream
The sensor for detecting vortex street frequency is equipped in dynamic channel, the sensor is thermal sensor.
To achieve the goals above, the invention also discloses a kind of hot type vortex-shedding meter, which includes
Flowmeter bodies and setting are in intrinsic above-mentioned hot type flux of vortex street metering device.
Compared with prior art, device and flowmeter are measured using the hot type flux of vortex street of above-mentioned technical proposal, had
It is following the utility model has the advantages that
One, device is measured using the hot type flux of vortex street of the utility model, thermal sensor fluid flow drives thermal energy
Variation is more sensitive, can be measured that the flowing for the small flow material that conventional piezoelectric formula sensor can not detect, expands stream
The range of meter.
Two, thermal sensor is arranged in the flow channel on eddy generator, and vortex street makes in the flowing of flow channel mouth
The fluid obtained in flow channel is flowed, the hot type when measuring pipeline along pipeline generation axial vibration, in flow channel
Sensor is unaffected, and the mistake of flowmeter is avoided to survey, and improves the accuracy of flowmeter measurement.
Three, thermal sensor is located in flow channel, during the installation process, reduces to the straight pipeline requirement condition of upstream,
It can adapt to the utilization and installation of more occasions.
Four, the hot type flux of vortex street metering device of the utility model only needs the frequency values of temperature change, to specific temperature
Difference is of less demanding, and the specific temperature difference is highly susceptible to external influence and changes, but the frequency degree of susceptibility of temperature change
It is small, so that measurement result is more accurate.
Preferably, the eddy generator is the column structure of the diameter line setting along measurement pipeline section, the whirlpool
The section of generating body is triangle or trapezoidal.
Preferably, the flow channel is located at the middle part of eddy generator, and flow channel is perpendicular with eddy generator.
Preferably, the thermal sensor is located at the middle part of flow channel.
Preferably, the thermal sensor includes calandria, upstream temperature sensor and downstream temperature sensor, upstream temperature
Degree sensor and downstream temperature sensor are symmetricly set on the both sides of calandria.
During measurement, the vortex of generation is very faint, in order to come out faint flow detection, guarantees stream
The measurement range and precision of meter, upstream temperature sensor are provided preferably with two, there are two the downstream temperature sensor is set,
Two downstream sensors and two downstream sensors are symmetrically arranged at the two sides of calandria.
Preferably, the thermal sensor is MEMS sensor.
Detailed description of the invention
Fig. 1 is the structural schematic diagram that the utility model hot type flux of vortex street measures Installation practice；
Fig. 2 is the structural schematic diagram of eddy generator in the present embodiment；
Fig. 3 is the enlarged drawing in Fig. 2 at A；
Fig. 4 is the structural schematic diagram of traditional vortex-shedding meter.
Appended drawing reference: 1, pipeline is measured；2, eddy generator；3, flow channel；4, thermal sensor；41, calandria；
42, upstream temperature sensor；43, downstream temperature sensor；5, piezoelectric transducer.
Specific embodiment
The utility model is described further with reference to the accompanying drawing.
Fig. 1 is the schematic diagram of the section structure that hot type flux of vortex street measures device, and the vortex-shedding meter in the present embodiment includes
Above-mentioned flowmeter bodies and hot type flux of vortex street measure device.In Fig. 1 arrow direction be fluid flow direction, small flow material from
The upstream entrance of the measurement pipeline 1 of flowmeter flows into measurement pipeline 1, and being equipped at the middle part of measurement pipeline 1 makes air-flow generate rule
Then interlock vortex street eddy generator 2.Eddy generator 2 is cylindricality eddy generator 2, and the section of eddy generator 2 is triangle
Shape is trapezoidal, and the swirl generating body is arranged on the diameter line of the circular cross-section of measurement pipeline 1.Small flow material flows through whirlpool
The fluoran stream surface of whirlpool generating body 2, under the action of fluoran stream surface to both sides formation rule vortex street and to measurement pipeline 1 lower exit stream
It is dynamic.
It is as shown in Figures 2 and 3 the structural schematic diagram of eddy generator 2 in the present embodiment, the middle part of eddy generator 2 is set
There is the flow channel for extending transversely through eddy generator 23, small flow material generates regular under the action of fluoran stream surface
Vortex passes through the flow channel 3 on eddy generator 2 in the process of flowing along the two sides flow further downstream of eddy generator 2
When, the fluid in single vortex will be flowed into flow channel 3.The middle part of flow channel 3 is provided with a thermal sensor
4, the detailed construction inside thermal sensor 4 is as shown in Figure 3, and thermal sensor 4 includes intermediate calandria 41 and heating
The temperature sensor on 41 both sides of body.The fluid of single vortex flow to the other end from one end of flow channel 3, then can be logical in flowing
The upstream and downstream of opposite calandria 41 is formed in road 3.The upstream of calandria 41 is set there are two upstream temperature sensor 42, downstream
Two downstream temperature sensors 43 are equally provided with, the temperature sensor of upstream and downstream is symmetrical arranged centered on calandria 41
, upstream and downstream is respectively provided with there are two temperature sensor, is carried out using the measurement that the secondary temperature difference surveys heat type flow quantity to the temperature difference herein
Measurement can be good at avoiding the problem that traditional thermal sensor measurement range is small and noise.In the present embodiment, hot type senses
Device 4 uses MEMS sensor.
Into after the heated body 41 of flow duct cocurrent, the heat around calandria 41 can be because fluid flows single bumpy flow
It changes, temperature sensor detects temperature change at this time, generates vortex of temperature difference data record.Small flow material is flowing
The vortex generated after eddy generator 2 is that well-regulated left and right is alternate, so after the vortex warp on one side, the other side
Vortex can flow into flow channel from another end opening of flow channel 3, and the fluid flow direction in flow channel 3 can be adjusted
Turn, opposite calandria 41 generates new upstream and downstream；That is, the upstream and downstream of above-mentioned calandria 41 be it is opposite, can be with
Mutually convert.
Temperature sensor detects temperature change, and instant heating type sensor detects temperature change.When thermal sensor detects
In the conversion and calculating that next step will be entered after to temperature change, the temperature difference detected is converted into voltage signal, voltage letter
Number the flow of vortex street frequency and microfluid is eventually converted by processing.
Below to hot type flux of vortex street metering device in the present embodiment and flowmeter to the measurement method of small flow material into
The detailed elaboration of row:
The fluid of small flow flows through the eddy generator 2 in measurement pipeline 1, generates whirlpool in the fluoran stream surface of eddy generator 2
Street signal.Vortex street is made of the staggered vortex in regular left and right one by one, and the single vortex of generation is logical by flowing
The fluid in flowing is driven to flow when road 3.Vortex signal is transmitted to sensing by the flow channel 3 in eddy generator 2
On device, and sensor detects the frequency signal that the vortex signal flows in flow channel 3.Heat in flow channel 3
It include the temperature sensor on 41 both sides of calandria 41 and calandria in formula sensor 4, when the fluid in flow channel 3 flows
Afterwards, the temperature of 41 upstream and downstream of calandria changes, and upstream and downstream is made to generate the temperature difference.The temperature sensor of upstream and downstream will be examined
The temperature difference measured is converted to voltage signal.Voltage signal is by the vortex signal that processor processing is exactly that flowmeter detects
Frequency signal.After obtaining the vortex street frequency signal of fluid generation, according to formula f=SrU1/d and other algorithms by the tool of small flow
The calculating of body flow value is measured, in above-mentioned formula, f: vortex street frequency；Sr: Strouhal number；U1: 2 two sides of eddy generator
Mean flow rate；D: the width of 2 fluoran stream surface of eddy generator.
The above makes preferred embodiments of the present invention, does not depart from for those of ordinary skill in the art
Under the premise of the utility model principle, several variations and modifications can also be made, these also should be regarded as the protection of the utility model
Range.
Claims (8)
1. a kind of hot type flux of vortex street measures device, including measurement pipeline (1), it is characterised in that: further include to be measured for making
The eddy generator (2) of fluid generation rule vortex signal, the eddy generator (2) are located in measurement pipeline (1), the whirlpool
Whirlpool generating body (2) is equipped with the flow channel (3) passed through for fluid, is equipped in the flow channel (3) for detecting vortex street
The sensor of frequency, the sensor are thermal sensor (4).
2. hot type flux of vortex street according to claim 1 measures device, it is characterised in that: the eddy generator (2) is
Along the column structure of the diameter line setting in measurement pipeline (1) section, the section of the eddy generator (2) is triangle or ladder
Shape.
3. hot type flux of vortex street according to claim 1 measures device, it is characterised in that: the flow channel (3) is located at
The middle part of eddy generator (2), flow channel (3) and eddy generator (2) are perpendicular.
4. hot type flux of vortex street according to claim 1 measures device, it is characterised in that: thermal sensor (4) position
In the middle part of flow channel (3).
5. hot type flux of vortex street according to any one of claims 1 to 4 measures device, it is characterised in that: the hot type
Sensor (4) includes calandria (41), upstream temperature sensor (42) and downstream temperature sensor (43), upstream temperature sensor
(42) and downstream temperature sensor (43) is symmetricly set on the both sides of calandria (41).
6. hot type flux of vortex street according to claim 5 measures device, it is characterised in that: the upstream temperature sensor
(42) there are two setting, there are two the downstream temperature sensor (43) sets.
7. hot type flux of vortex street according to any one of claims 1 to 4 measures device, it is characterised in that: the hot type
Sensor (4) is MEMS sensor.
8. a kind of hot type vortex-shedding meter, including flowmeter bodies, it is characterised in that: be equipped with such as claim 1 in the ontology
Device is measured to hot type flux of vortex street described in 7 any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820749647.8U CN208187473U (en) | 2018-05-18 | 2018-05-18 | A kind of hot type flux of vortex street metering device and flowmeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820749647.8U CN208187473U (en) | 2018-05-18 | 2018-05-18 | A kind of hot type flux of vortex street metering device and flowmeter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208187473U true CN208187473U (en) | 2018-12-04 |
Family
ID=64427393
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820749647.8U Active CN208187473U (en) | 2018-05-18 | 2018-05-18 | A kind of hot type flux of vortex street metering device and flowmeter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208187473U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108680208A (en) * | 2018-05-18 | 2018-10-19 | 金卡智能集团股份有限公司 | A kind of hot type flux of vortex street metering device, flowmeter and its flow-measuring method |
-
2018
- 2018-05-18 CN CN201820749647.8U patent/CN208187473U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108680208A (en) * | 2018-05-18 | 2018-10-19 | 金卡智能集团股份有限公司 | A kind of hot type flux of vortex street metering device, flowmeter and its flow-measuring method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108680208A (en) | A kind of hot type flux of vortex street metering device, flowmeter and its flow-measuring method | |
| US8091434B2 (en) | Fluidic oscillator flow meter | |
| CN101467008B (en) | Multi-vortex flowmeter integrating pressure gauge | |
| CN100453978C (en) | Multi-vortex flow meter | |
| US20110083516A1 (en) | Recirculation type oscillator flow meter | |
| US3888120A (en) | Vortex type flowmeter with strain gauge sensor | |
| GB2161941A (en) | Mass flow meter | |
| CN208187473U (en) | A kind of hot type flux of vortex street metering device and flowmeter | |
| CN208187472U (en) | A kind of the flux of vortex street metering device and flowmeter of wide-range | |
| CN201327400Y (en) | Wet steam flowmeter with two-phase flow | |
| CN202057360U (en) | Combined gas flow meter | |
| CN102645248B (en) | Self-correction heat type-precession vortex combined type gas flow measurement method | |
| CN208109188U (en) | Vortex-shedding meter | |
| CN206788610U (en) | A kind of measurement apparatus | |
| CN208187470U (en) | A kind of annular flux of vortex street metering device and flowmeter | |
| CN112964323B (en) | Saturated wet steam mass flow and dryness measuring device and measuring method | |
| CN203893894U (en) | Flexible body based vortex shedding flowmeter | |
| US4995269A (en) | Vortex flowmeter having an asymmetric center body | |
| CN208187471U (en) | A kind of flux of vortex street metering device with pre- rectification function | |
| CN103353319A (en) | Moisture flow measuring method based on straight through type gas ultrasonic flowmeter | |
| CN202631024U (en) | Self-calibration heat-precession vortex combined-type gas flow-rate measuring device | |
| CN101832801A (en) | Vortex flowmeter | |
| CN201653459U (en) | Vortex flowmeter | |
| CN214149420U (en) | Saturated wet steam mass flow and dryness measuring device | |
| CN108709593A (en) | A kind of annular flux of vortex street metering device, flowmeter and its flow-measuring method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |