CN107121165A - Vortex flow sensors - Google Patents
Vortex flow sensors Download PDFInfo
- Publication number
- CN107121165A CN107121165A CN201710478637.5A CN201710478637A CN107121165A CN 107121165 A CN107121165 A CN 107121165A CN 201710478637 A CN201710478637 A CN 201710478637A CN 107121165 A CN107121165 A CN 107121165A
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- CN
- China
- Prior art keywords
- vortex flow
- flow sensors
- transducer
- acoustic pressure
- attachment means
- 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.)
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
- G01F1/20—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by detection of dynamic effects of the flow
- G01F1/32—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by detection of dynamic effects of the flow using swirl flowmeters
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
- G01F1/20—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by detection of dynamic effects of the flow
- G01F1/32—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by detection of dynamic effects of the flow using swirl flowmeters
- G01F1/325—Means for detecting quantities used as proxy variables for swirl
- G01F1/3282—Means for detecting quantities used as proxy variables for swirl for detecting variations in infrasonic, sonic or ultrasonic waves, due to modulation by passing through the swirling fluid
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
Present invention relates particularly to vortex flow sensors.Vortex flow sensors of the present invention include the transducer that sound wave kinetic energy is converted into electric signal, the transducer includes upper casing and lower casing, two acoustic pressure chambers are set on the lower casing, the upper casing sets two first chambers, piezoelectric ceramic piece is set between the first chamber and the acoustic pressure chamber, and the piezoelectric ceramic piece is connected with the detection circuit of the hull outside；Metal film is set between the acoustic pressure chamber and the piezoelectric ceramic piece；Two leading for conduction fluid dynamic energy are provided with the table body of the swirl generating body both sides can hole；The energy hole of leading is connected with the acoustic pressure chamber.Vortex flow sensors of the present invention drastically increase the vibration resistance of vortex flow sensors, it can be made reliablely and stablely to be worked in the medium of 500 DEG C of even more high temperature, also there is very good cleaning ability certainly, worse working environment is adapted to, with extraordinary market application foreground.
Description
Technical field
The present invention relates to the sensor of measurement flow, and in particular to vortex flow sensors.
Background technology
With the release that Karman vortex street is theoretical, new revolution is generated once in field of flow measurement.Utilize Karman vortex street
The sensor of principle manufacture, commonly referred to as vortex flow sensors.Now, the vortex flow sensors that in the market occurs mainly have
Two kinds：A kind of is the piezoelectric type vortex flow sensors by the use of piezoelectric ceramic piece as detection device.Due to piezoelectric ceramic piece device
Part is a kind of force-sensing parts, the influence for the other active forces being vulnerable in addition to swirling action power, and therefore, anti-vibration resistance is poor, separately
Outside, piezoelectric ceramic piece device by material itself due to being limited, and operating temperature range is narrower, should not be in the high temperature more than 300 DEG C
Worked under environment, high temperature resistant property is poor.Another is the capacitor type vortex street flow sensor made using differential capacitor principle,
It solves the defect of piezoelectric type vortex flow sensors within the specific limits.But, in big flow high flow rate and more than 400
When being worked under DEG C temperatures above environment, due to by capacitor plate spacing (sensitivity of influence sensor) and material expand coefficient
Limitation and influence, still occur because the easy short circuit of electric capacity causes the unstable situation of fault rate high workload.
The content of the invention
It is an object of the invention to provide a kind of vortex flow sensors of measurable flow under high temperature, regular flow is overcome
Sensor in the case of higher than 500 DEG C the problem of effectively can not measure flow, and improvement beam type structure vibration resistance is poor
Defect.
To solve above technical problem, the technical solution adopted by the present invention is：
The table body axle is provided perpendicular in vortex flow sensors of the present invention, including table body, the table body
The swirl generating body of line, in addition to sound wave kinetic energy is converted into the transducer of electric signal,
The transducer includes housing, and the housing includes setting two acoustic pressure chambers, institute on upper casing and lower casing, the lower casing
State upper casing and two first chambers are set, the acoustic pressure chamber is correspondingly arranged with first cavity, the first chamber and the sound
Piezoelectric ceramic piece is set between pressure chamber, the piezoelectric ceramic piece is electrically connected with the detection circuit of the hull outside；
Metal film is set between the acoustic pressure chamber and the piezoelectric ceramic piece；
Two leading for conduction fluid dynamic energy are provided with the table body of the swirl generating body both sides can hole；
The energy hole of leading is connected with the acoustic pressure chamber.
It is preferred that, the housing is disc.
It is preferred that, in addition to transducer installing mechanism, the transducer installing mechanism is included by the first attachment means and the
The transducer installation cavity that two attachment means are surrounded, the transducer is fixedly installed in second attachment means, and described second
The attachment means correspondence acoustic pressure chamber is provided with through hole, and connecting rod is set between second attachment means and the table body.
It is preferred that, the groove matched with the housing is provided with second attachment means, the transducer is installed
In the groove.
It is preferred that, described lead can set acoustic pressure pipe between hole and the through hole.
It is preferred that, first attachment means and second attachment means are flange.
It is preferred that, filling epoxide-resin glue in the first chamber.
It is preferred that, the thickness of the metal film is 0.1-1mm.
It is preferred that, the swirl generating body is triangle column type.
It is preferred that, sealing ring is set between the through hole edge and the transducer.
Operation principle
When fluid passes through table body with certain flow velocity, the asymmetrical alternately rotation of two rows is produced in the both sides of swirl generating body
Whirlpool, so as to produce fluid oscillation, the wave energy of fluid oscillation formation is alternately acted on by the acoustic pressure pipe of swirl generating body both sides
So as to form the charge signal of alternately change on sound wave kinetic energy transducer, produced after testing after circuit amplification, filtering and shaping
Pulse duration frequency signal, so as to reach the purpose of flow detection.
Compared with prior art, the invention has the advantages that：
1) the sound wave kinetic energy transducer of the design can use the structure away from medium, in 500 DEG C of even more high temperature
Reliablely and stablely worked in medium, its high temperature resistance, safe and reliable, sensitivity are high, good anti-vibration characteristic has good use
Value and market value；
2) the design, using disk structure, drastically increases the vibration resistance of vortex flow sensors from structure,
Greatly improve the defect of beam type structure vibration resistance difference；
3) signal detection of the design is drawn by the acoustic pressure pipe of swirl generating body both sides, in swirl generating body both sides due to whirlpool
The effect in street can alternately form negative pressure, reach it is a kind of breathe the effect handled up so that play to acoustic pressure pipe do not stop wash away work
With, therefore the present invention also has very good cleaning ability certainly, worse working environment is adapted to, with extraordinary
Market application foreground.
Brief description of the drawings
Fig. 1 is vortex flow sensors structural representation；
Fig. 2 is transducer architecture schematic diagram；
Fig. 3 is transducer top view；
Fig. 4 is the second attachment means structural representation；
Fig. 5 is table body structural representation
Wherein：
1- table bodies；11- swirl generating bodies；12- is led can hole；21- upper casings；22- lower casings；23- acoustic pressure chambers；24- first chambers；
25- piezoelectric ceramic pieces；26- wire guides；27- wires；28- metal films；3- detects circuit；The attachment means of 41- first；42- second
Attachment means；43- transducer installation cavitys；44- through holes；45- mounting holes.
Embodiment
Technical scheme is described in further detail with reference to embodiment.
The following description only actually is illustrative, never as to the present invention and its application or using
Any limitation.
As shown in figure 1, vortex flow sensors of the present invention, including table body 1, it is provided perpendicular in the table body
The swirl generating body 11 of the table body axis, in addition to sound wave kinetic energy is converted into the transducer 2 of electric signal；
As shown in Fig. 2 the transducer includes housing, the housing includes setting on upper casing 21 and lower casing 22, lower casing 22
Two acoustic pressure chambers 23, upper casing sets two first chambers 24, and two acoustic pressure chambers 23 are correspondingly arranged with two first chambers 24 respectively,
Ultrasonic piezoelectric ceramic piece 25, piezoelectric ceramic piece 25 and the detection circuit of hull outside are set between first chamber 24 and acoustic pressure chamber 23
3 are connected by wire 27；Metal film 28 is set between acoustic pressure chamber 23 and piezoelectric ceramic piece 25；
Can hole 12 as shown in figure 5, being provided with two leading for conduction fluid dynamic energy on the table body 1 of the both sides of swirl generating body 11；
Lead energy hole 12 to connect with acoustic pressure chamber 23, the swirl generating body is triangle column type.
When fluid passes through table body 1 with certain flow velocity, the asymmetrical friendship of two rows is produced in the both sides of swirl generating body 11
For vortex, so as to produce fluid oscillation, the acoustic wave energy of fluid oscillation formation is handed over by the energy hole 12 of leading of swirl generating body both sides
Alternately act on transducer 2 so as to formed alternately change charge signal, after testing circuit 3 amplify, filter and shaping after produce
Raw pulse duration frequency signal, detection circuit 3 is known technology, just repeated no more here for the processing of charge signal.
The thickness of metal film 28 is 0.1-1mm, should not select blocked up or excessively thin film, and the metal film that the present embodiment is selected is
Stainless steel membrane.
As shown in figure 3, the upper casing 21 of transducer and the lower casing 22 are disc-shape in the present embodiment, the shell after combination
Body is also that the vortex flow sensors in disc-shape, the present embodiment also include transducer installing mechanism, transducer installing mechanism
Including the transducer installation cavity 43 surrounded by the first attachment means 41 and the second attachment means 42, transducer 2 is fixedly installed on
In two attachment means 42, the second attachment means 42 correspondence acoustic pressure chamber 23 is provided with through hole 44, the second attachment means 42 and table
Some connecting rods 5 are set between body 1, and connecting rod 5 causes installing structure for transducer to fix more firm, connecting rod 5 with table body
Shape with that can be column, or sheet, connecting rod 5 can be individually fixedly connected with the second attachment means, also may be used
It is connected with each other and is integrally formed with all connecting rods 5.
As shown in Figure 3 and Figure 4, the first attachment means 41 and the second attachment means 42 are flange, wherein the second connection dress
The groove for being provided with and matching with the housing of transducer 2 on 42 is put, the transducer is arranged in the groove, at the sound in groove
The position of pressure chamber 23 is provided with the mounting hole 45 for being additionally provided with through hole 44, groove and installing transducer 2, the first attachment means 41
Wire guide 26 is provided with, the wire 27 of connection piezoelectric ceramic piece 25 is drawn by wire guide 26, is connected with detection circuit 3.
As shown in figure 1, acoustic pressure pipe 6 can be set by leading between hole 12 and through hole 44, what acoustic pressure pipe 6 was played is that will lead energy hole 12 to pass
The sound wave kinetic energy for passing out is delivered to transducer 2, simultaneously as the presence of acoustic pressure pipe 6 by table body 1 and transducer 2 apart from increase,
Prevent the fluid for flowing through table body 1 from splashing pollution transducer 2 on transducer 2, the external diameter of through hole 44 is not less than the external diameter of acoustic pressure chamber 23, through hole
Sealing ring is set between 44 edges and transducer 2, prevents sound wave kinetic energy from revealing.
As shown in Fig. 2 filling epoxide-resin glue in first chamber 24, epoxide-resin glue can play the fixed He of metal film 28
The effect of piezoelectric ceramic piece 25, also plays the effect of insulation.
The sound wave kinetic energy transducer of the present embodiment can use the structure away from medium, in 500 DEG C of even more high temperature
Reliablely and stablely worked in medium, its high temperature resistance, safe and reliable, sensitivity are high, good anti-vibration characteristic；Using disc type knot
Structure, drastically increases the vibration resistance of vortex flow sensors, greatly improves the defect of beam type structure vibration resistance difference；Letter
Number detection by swirl generating body both sides acoustic pressure pipe draw, in swirl generating body both sides because the effect of vortex street can be alternately formed
Negative pressure, reaches a kind of effect for breathing and handling up, and souring is not stopped to acoustic pressure pipe so as to play, therefore the present invention is also with non-
Often good cleans ability certainly, worse working environment is adapted to, with good use value and market value.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.Within the spirit and principles of the invention, that is made any repaiies
Change, equivalent substitution, improvement etc., should be included in the scope of the protection.
Claims (10)
1. the swirl generating body of the table body axis is provided perpendicular in vortex flow sensors, including table body, the table body,
Characterized in that, also include the transducer that sound wave kinetic energy is converted into electric signal,
The transducer includes housing, and the housing includes upper casing and lower casing, sets two acoustic pressure chambers on the lower casing, it is described on
Shell sets two first chambers, and the acoustic pressure chamber is correspondingly arranged with first cavity, the first chamber and the acoustic pressure chamber
Between piezoelectric ceramic piece is set, the piezoelectric ceramic piece is connected with the detection circuit of the hull outside；
Metal film is set between the acoustic pressure chamber and the piezoelectric ceramic piece；
Two leading for conduction fluid dynamic energy are provided with the table body of the swirl generating body both sides can hole；
The energy hole of leading is connected with the acoustic pressure chamber.
2. vortex flow sensors according to claim 1, it is characterised in that the housing is disc.
3. vortex flow sensors according to claim 1, it is characterised in that described also including transducer installing mechanism
Transducer installing mechanism includes the transducer installation cavity surrounded by the first attachment means and the second attachment means, and the transducer is consolidated
Surely it is arranged in second attachment means, the second attachment means correspondence acoustic pressure chamber is provided with through hole, described second
Connecting rod is set between attachment means and the table body.
4. vortex flow sensors according to claim 3, it is characterised in that be provided with second attachment means with
The groove that the housing matches, the transducer is arranged in the groove.
5. vortex flow sensors according to claim 1, it is characterised in that described lead can set between hole and the through hole
Put acoustic pressure pipe.
6. vortex flow sensors according to claim 3, it is characterised in that first attachment means and described second
Attachment means are flange.
7. vortex flow sensors according to claim 1, it is characterised in that filling epoxy resin in the first chamber
Glue.
8. vortex flow sensors according to claim 1, it is characterised in that the thickness of the metal film is 0.1~
1mm。
9. vortex flow sensors according to claim 1, it is characterised in that the swirl generating body is triangle column type.
10. vortex flow sensors according to claim 3, it is characterised in that the through hole edge and the transducer
Between sealing ring is set.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710478637.5A CN107121165A (en) | 2017-06-22 | 2017-06-22 | Vortex flow sensors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710478637.5A CN107121165A (en) | 2017-06-22 | 2017-06-22 | Vortex flow sensors |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107121165A true CN107121165A (en) | 2017-09-01 |
Family
ID=59719914
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710478637.5A Pending CN107121165A (en) | 2017-06-22 | 2017-06-22 | Vortex flow sensors |
Country Status (1)
| Country | Link |
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| CN (1) | CN107121165A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109570137A (en) * | 2019-01-18 | 2019-04-05 | 西南交通大学 | A kind of ultrasound wave descaling device with self-diagnostic function |
| CN111551223A (en) * | 2019-02-12 | 2020-08-18 | 西门子股份公司 | Flow meter for fluid with pulsed flow |
| CN116202584A (en) * | 2023-05-05 | 2023-06-02 | 河南新航流量仪表有限公司 | Vibration-resistant vortex shedding flowmeter |
-
2017
- 2017-06-22 CN CN201710478637.5A patent/CN107121165A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109570137A (en) * | 2019-01-18 | 2019-04-05 | 西南交通大学 | A kind of ultrasound wave descaling device with self-diagnostic function |
| CN109570137B (en) * | 2019-01-18 | 2024-03-29 | 西南交通大学 | Ultrasonic descaling device with self-diagnosis function |
| CN111551223A (en) * | 2019-02-12 | 2020-08-18 | 西门子股份公司 | Flow meter for fluid with pulsed flow |
| US11815374B2 (en) | 2019-02-12 | 2023-11-14 | Siemens Aktiengesellschaft | Flow meter for a fluid with a pulsating flow |
| CN116202584A (en) * | 2023-05-05 | 2023-06-02 | 河南新航流量仪表有限公司 | Vibration-resistant vortex shedding flowmeter |
| CN116202584B (en) * | 2023-05-05 | 2023-07-18 | 河南新航流量仪表有限公司 | Vibration-resistant vortex shedding flowmeter |
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