CN208860407U - A kind of high temperature cutting type vortex street flow sensor - Google Patents
A kind of high temperature cutting type vortex street flow sensor Download PDFInfo
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- CN208860407U CN208860407U CN201821524587.6U CN201821524587U CN208860407U CN 208860407 U CN208860407 U CN 208860407U CN 201821524587 U CN201821524587 U CN 201821524587U CN 208860407 U CN208860407 U CN 208860407U
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- piezoelectric crystal
- vortex street
- high temperature
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Abstract
The utility model discloses a kind of high temperature cutting type vortex street flow sensors, including upper housing and lower case, upper housing and lower case split form barrel chamber, barrel chamber is internally provided with core column, the bottom of core column is respectively arranged with left fixed electrode and right fixed electrode, moving electrode is provided between left fixed electrode and right fixed electrode, the Base top contact of left fixed electrode has left electrode wires, the Base top contact of right fixed electrode has right electrode wires, the upper section collet of left electrode wires has the first piezoelectric crystal plate, and the upper section collet of right electrode wires has the second piezoelectric crystal plate.Two groups of piezoelectric crystal plates are set, using the shear mode structure of piezoelectric crystal plate, vortex street power is converted into the shearing force of crystal wafer, improve electromechanical conversion efficiency, vibration signal in vortex signal can be influenced to be minimized, vortex flow sensors are made to be suitable for various complex working conditions, and vortex street inductive probe is made using 304 stainless steels, improves ability resistant to high temperature.
Description
Technical field
The utility model relates to a kind of vortex flow sensors, in particular to a kind of shear at high temperature type vortex-street flow sensing
Device.
Background technique
Vortex-shedding meter be the measurement gas researched and produced according to Karman vortex street principle, the volume flow of steam or liquid,
The volume flow of condition or the volume flowmeter of mass flow are marked, the flow measurement of industrial pipeline medium fluid, such as gas are mainly used for
A variety of media such as body, liquid, steam, its main feature is that the pressure loss is small, range ability is big, and precision is high, in Test Cycle volume flow
It is hardly influenced by parameters such as fluid density, pressure, temperature, viscosity when amount, existing sensor generally uses high temperature glue
Or epoxy resin encapsulation, sensor failure easy to aging and service life are short, and the measurement method electromechanical conversion efficiency of stress-type is lower, output
Signal is weaker, and sensor probe non-refractory, working environment are restricted.
Utility model content
The technical problems to be solved in the utility model is to overcome the deficiencies of existing technologies, and provides a kind of shear at high temperature type vortex street
Vortex street power can be converted into the shearing force of crystal wafer, improve electromechanical conversion efficiency, make the measurement of sensor by flow sensor
Flux lower limit has preferable effect, the vibration signal in vortex signal can be influenced to be minimized, so that vortex-street flow sensing
Device is suitable for the operating condition of various complexity.
In order to solve the above-mentioned technical problem, the utility model provides the following technical solution:
A kind of high temperature cutting type vortex street flow sensor of the utility model, including upper housing and lower case, the upper housing
Top be provided with conductor terminal, the bottom of the lower case is provided with vortex street inductive probe, the upper housing and lower case it
Between socket ring flange is installed, the upper housing and lower case split form barrel chamber, and the barrel chamber is internally provided with core column,
The bottom of the core column is respectively arranged with left fixed electrode and right fixed electrode, the left fixed electrode and right fixed electrode it
Between be provided with moving electrode, be provided with suspension at the top of the moving electrode, the Base top contact of the left fixed electrode has left electrode wires, institute
The Base top contact for stating right fixed electrode has right electrode wires, and the upper section collet of the left electrode wires has the first piezoelectric crystal plate, described
The upper section collet of right electrode wires has the second piezoelectric crystal plate, and the top of the suspension, left electrode wires and right electrode wires, which passes through, leads
Line terminals are drawn.
As a kind of optimal technical scheme of the utility model, the inner sidewall of the upper housing is correspondingly arranged on the first installation
Block and the second mounting blocks, first mounting blocks and the second mounting blocks are fixedly installed togather by fixing bolt split, and the
First piezoelectric crystal plate and the second piezoelectric crystal plate are fixedly clamped by one mounting blocks and the second mounting blocks by split.
As a kind of optimal technical scheme of the utility model, the left fixed electrode, right fixed electrode and core column
It is all made of 800 DEG C or more high temperature silver paste sintering process between the plane of two sides, left fixed electrode and right fixed electrode are bonded in core
In two side planes of scapus.
As a kind of optimal technical scheme of the utility model, first piezoelectric crystal plate and the second piezoelectric crystal plate are adopted
It is shearing-type lithium niobate piezoelectric crystal wafer.
As a kind of optimal technical scheme of the utility model, the vortex street inductive probe be by 304 stainless steels production and
At.
Compared with prior art, the beneficial effects of the utility model are as follows:
The utility model is by two groups of piezoelectric crystal plates of setting, using the shear mode structure of piezoelectric crystal plate, two groups of pressures
Transistor piece exports the piezoelectric signal opposite with another group of piezoelectric crystal plate, and vortex street power can be converted into the shearing of crystal wafer
Power improves electromechanical conversion efficiency, and the measuring flow lower limit of sensor is made to have preferable effect, can be the vibration in vortex signal
Dynamic effect of signals is minimized, so that vortex flow sensors are suitable for the operating condition of various complexity, and vortex street inductive probe uses
304 stainless steels are made, and substantially increase ability resistant to high temperature.
Detailed description of the invention
Attached drawing is used to provide a further understanding of the present invention, and constitutes part of specification, practical with this
Novel embodiment is used to explain the utility model together, does not constitute limitations of the present invention.In the accompanying drawings:
Fig. 1 is the overall structure diagram of the utility model；
Fig. 2 is the overlooking structure diagram of the utility model；
Fig. 3 is the partial structural diagram of the utility model；
In figure: 1, upper housing；2, lower case；3, conductor terminal；4, vortex street inductive probe；5, ring flange；6, barrel chamber；7, core
Scapus；8, left fixed electrode；9, right fixed electrode；10, moving electrode；11, suspension；12, left electrode wires；13, right electrode wires；14,
First piezoelectric crystal plate；15, the second piezoelectric crystal plate；16, the first mounting blocks；17, the second mounting blocks；18, fixing bolt.
Specific embodiment
It is illustrated below in conjunction with preferred embodiment of the attached drawing to the utility model, it should be understood that described herein excellent
It selects embodiment to be only used for describing and explaining the present invention, is not used to limit the utility model.Wherein identical mark in attached drawing
Number all refer to identical component.
In addition, if the detailed description of known technology for show the utility model be characterized in it is unnecessary, then by it
It omits.It should be noted that word "front", "rear" used in the following description, "left", "right", "up" and "down" refer to it is attached
Direction in figure, word "inner" and "outside" refer respectively to the direction towards or away from geometric center of specific component.
It should also be noted that, unless otherwise clearly defined and limited, term " setting ", " connection " should do broad sense reason
Solution, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can be mechanical connection, it can also be with
It is electrical connection；It can be directly connected, the connection inside two elements can also be can be indirectly connected through an intermediary.
For the ordinary skill in the art, the concrete meaning of above-mentioned term in the present invention can be understood with concrete condition, this
Outside, term " first ", " second " etc. are only used for distinguishing description, are not understood to indicate or imply relative importance.
Embodiment 1
As shown in Figure 1-3, the utility model provides a kind of high temperature cutting type vortex street flow sensor, including 1 He of upper housing
Lower case 2, the top of upper housing 1 are provided with conductor terminal 3, and the bottom of lower case 2 is provided with vortex street inductive probe 4, upper housing 1
Socket is equipped with ring flange 5 between lower case 2, and upper housing 1 and 2 split of lower case form barrel chamber 6, the inside setting of barrel chamber 6
There is core column 7, the bottom of core column 7 is respectively arranged with left fixed electrode 8 and right fixed electrode 9, left fixed electrode 8 and right fixation
Moving electrode 10 is provided between electrode 9, wherein moving electrode is movable electrode, is provided with suspension 11, left fixation at the top of moving electrode 10
The Base top contact of electrode 8 has a left electrode wires 12, and the Base top contact of right fixed electrode 9 has a right electrode wires 13, left electrode wires 12 it is upper
Section collet has the first piezoelectric crystal plate 14, and the upper section collet of right electrode wires 13 has the second piezoelectric crystal plate 15, suspension 11, left electrode
The top of line 12 and right electrode wires 13 passes through conductor terminal 3 and draws, convenient for when electrode wires experience vibration signal,
First piezoelectric crystal plate 14 exports the piezoelectric signal opposite with the second piezoelectric crystal plate 15, the vibration being mingled in vortex signal
Influence caused by signal is reduced to minimum.
Further, the inner sidewall of upper housing 1 is correspondingly arranged on the first mounting blocks 16 and the second mounting blocks 17, the first installation
Block 16 and the second mounting blocks 17 are fixedly installed togather by 18 split of fixing bolt, and the first mounting blocks 16 and the second mounting blocks
17 are fixedly clamped the first piezoelectric crystal plate 14 and the second piezoelectric crystal plate 15 by split, reinforce stationarity, convenient for the first pressure
Transistor piece 14 and the second piezoelectric crystal plate 15 generate shear strain.
800 DEG C or more high temperature silver are all made of between the plane of the two sides of left fixed electrode 8, right fixed electrode 9 and core column 7
Left fixed electrode 8 and right fixed electrode 9 are bonded in two side planes of core column 7 by slurry sintering process, improve electrode anti-vibration
Performance.
First piezoelectric crystal plate 14 and the second piezoelectric crystal plate 15, can using shearing-type lithium niobate piezoelectric crystal wafer
Experience vortex signal and vibration signal.
Vortex street inductive probe 4 is made by 304 stainless steels, and highest is resistant to 600 DEG C of high temperature.
Specifically, inductor applications are in vortex-shedding meter, since fluid motion or extraneous factor cause vortex-shedding meter
Pipe vibration, vibration influence whether the vortex street alternating power that left electrode wires 12 and right electrode wires 13 incude, the first piezoelectric crystal plate 14
It is noted that two groups of piezoelectric crystal plate polarity are on the contrary, when electrode wires experience vibration when being installed with the second piezoelectric crystal plate 15
When signal, the first piezoelectric crystal plate 14 can export the piezoelectric signal opposite with the second piezoelectric crystal plate 15, believe vortex street is mingled in
Influence caused by vibration signal in number is reduced to minimum, when vortex street, which generates alternating power, to be acted on core column 7, can make core
Column 7 generates the strain of multiple degrees of freedom power, will lead to the output signal turmoil of sensor, makes amplifier be difficult to handle, strain at this time
Power acts on core column 7, and adaptability to changes generates shearing force to the piezoelectric crystal plate of shearing-type, so that the output wave of sensor
Shape improves electromechanical conversion efficiency close to sine wave, and output signal becomes strong.
The utility model is by two groups of piezoelectric crystal plates of setting, using the shear mode structure of piezoelectric crystal plate, two groups of pressures
Transistor piece exports the piezoelectric signal opposite with another group of piezoelectric crystal plate, and vortex street power can be converted into the shearing of crystal wafer
Power improves electromechanical conversion efficiency, and the measuring flow lower limit of sensor is made to have preferable effect, can be the vibration in vortex signal
Dynamic effect of signals is minimized, so that vortex flow sensors are suitable for the operating condition of various complexity, and vortex street inductive probe 4 uses
304 stainless steels are made, and substantially increase ability resistant to high temperature.
Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention, it is not limited to this
Utility model, although the utility model is described in detail with reference to the foregoing embodiments, for those skilled in the art
For, it is still possible to modify the technical solutions described in the foregoing embodiments, or to part of technical characteristic
It is equivalently replaced.Within the spirit and principle of the utility model, any modification, equivalent replacement, improvement and so on,
It should be included within the scope of protection of this utility model.
Claims (5)
1. a kind of high temperature cutting type vortex street flow sensor, including upper housing (1) and lower case (2), which is characterized in that on described
It is provided at the top of shell (1) conductor terminal (3), the bottom of the lower case (2) is provided with vortex street inductive probe (4), described
Socket is equipped with ring flange (5) between upper housing (1) and lower case (2), and the upper housing (1) and lower case (2) split are formed
Barrel chamber (6), the barrel chamber (6) are internally provided with core column (7), and the bottom of the core column (7) is respectively arranged with left fixation
Electrode (8) and right fixed electrode (9) are provided with moving electrode (10) between the left fixed electrode (8) and right fixed electrode (9),
It is provided with suspension (11) at the top of the moving electrode (10), the Base top contact of the left fixed electrode (8) has left electrode wires (12), institute
The Base top contact for stating right fixed electrode (9) has right electrode wires (13), and the upper section collet of the left electrode wires (12) has the first piezoelectricity
The upper section collet of crystal wafer (14), the right electrode wires (13) has the second piezoelectric crystal plate (15), the suspension (11), left electrode
The top of line (12) and right electrode wires (13) passes through conductor terminal (3) extraction.
2. a kind of high temperature cutting type vortex street flow sensor according to claim 1, which is characterized in that the upper housing
(1) inner sidewall is correspondingly arranged on the first mounting blocks (16) and the second mounting blocks (17), first mounting blocks (16) and second
Mounting blocks (17) are fixedly installed togather by fixing bolt (18) split, and the first mounting blocks (16) and the second mounting blocks (17)
The first piezoelectric crystal plate (14) and the second piezoelectric crystal plate (15) are fixedly clamped by split.
3. a kind of high temperature cutting type vortex street flow sensor according to claim 1, which is characterized in that the left fixed electricity
800 DEG C or more high temperature silver paste sintering process are all made of between the plane of the two sides of pole (8), right fixed electrode (9) and core column (7)
Left fixed electrode (8) and right fixed electrode (9) are bonded in two side planes of core column (7).
4. a kind of high temperature cutting type vortex street flow sensor according to claim 1, which is characterized in that first piezoelectricity
Crystal wafer (14) and the second piezoelectric crystal plate (15) are using shearing-type lithium niobate piezoelectric crystal wafer.
5. a kind of high temperature cutting type vortex street flow sensor according to claim 1, which is characterized in that the vortex street induction
Probe (4) is made by 304 stainless steels.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821524587.6U CN208860407U (en) | 2018-09-18 | 2018-09-18 | A kind of high temperature cutting type vortex street flow sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821524587.6U CN208860407U (en) | 2018-09-18 | 2018-09-18 | A kind of high temperature cutting type vortex street flow sensor |
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| Publication Number | Publication Date |
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| CN208860407U true CN208860407U (en) | 2019-05-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201821524587.6U Active CN208860407U (en) | 2018-09-18 | 2018-09-18 | A kind of high temperature cutting type vortex street flow sensor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU197044U1 (en) * | 2019-11-29 | 2020-03-26 | Акционерное общество "Промышленная группа "Метран" (АО "ПГ "Метран") | VORTEX CONVERTER WITH INTEGRATED FLANGE |
| CN113758999A (en) * | 2021-09-07 | 2021-12-07 | 山东大学 | Lithium niobate crystal piezoelectric cutting type and application thereof in high-temperature piezoelectric ultrasonic transducer |
-
2018
- 2018-09-18 CN CN201821524587.6U patent/CN208860407U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU197044U1 (en) * | 2019-11-29 | 2020-03-26 | Акционерное общество "Промышленная группа "Метран" (АО "ПГ "Метран") | VORTEX CONVERTER WITH INTEGRATED FLANGE |
| CN113758999A (en) * | 2021-09-07 | 2021-12-07 | 山东大学 | Lithium niobate crystal piezoelectric cutting type and application thereof in high-temperature piezoelectric ultrasonic transducer |
| CN113758999B (en) * | 2021-09-07 | 2024-03-15 | 山东本源晶体科技有限公司 | Lithium niobate crystal piezoelectric cutting and application thereof in high-temperature piezoelectric ultrasonic transducer |
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