CN208520420U - A kind of flow passage structure and gas flowmeter scale based on ultrasonic wave principle - Google Patents
A kind of flow passage structure and gas flowmeter scale based on ultrasonic wave principle Download PDFInfo
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- CN208520420U CN208520420U CN201821054723.XU CN201821054723U CN208520420U CN 208520420 U CN208520420 U CN 208520420U CN 201821054723 U CN201821054723 U CN 201821054723U CN 208520420 U CN208520420 U CN 208520420U
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Abstract
The utility model relates to a kind of flow passage structure based on ultrasonic wave principle and gas flowmeter scales, including a cavity, and are set to the intracorporal radome fairing of chamber and an inner tube assembly；An inner tube, the second ring baffle is arranged in the first annular baffle of setting, the first annulus, inner tube assembly in radome fairing, and the second annulus eventually passes through the cooperation of radome fairing and inner tube assembly, rectifies the tested air-flow introduced repeatedly more stable, improves measurement accuracy.
Description
Technical field
The utility model relates to ultrasonic gas flow meter amount fields, and in particular to a kind of runner knot based on ultrasonic wave principle
Structure and gas flowmeter scale.
Background technique
Measurement instrument of the gas flowmeter scale (abbreviation flowmeter) as meter gaseous volume amount, can intuitively show
Show the gas flow for flowing through pipeline, it is very easy to use, rapid proliferation is obtained in recent years.
According to testing requirement difference, same domain technical staff mainly passes through improvement and Optimization for Ultrasonic Wave gas flowmeter runner
Structure, to improve measurement accuracy.Patent document JP2012103087A proposes a kind of V-type flow passage structure, patent document
CN103471671B proposes that a kind of N-type flow passage structure, patent document CN103471672A propose a kind of W type flow passage structure, this three
Kind of flow passage structure application is relatively universal, but the defect of general character is that effective distance between two ultrasonic transducers is relatively short, V
Type, N-type, W type gas chamber cross section be it is rectangular, sectional area is relatively large, and tested air-flow flow velocity is relatively low, can reduce measurement essence
Degree；Patent document EP2759808A1 proposes a kind of ultrasonic gas meter, flow meter correlation type flow passage structure, and such structure can disappear to a certain degree
Except traditional V-type, W type and N-type flow passage structure ultrasonic signal lose large effect, air chamber structure is circle, can the side of overcoming
Shape flow passage structure sectional area is larger, is tested the low disadvantage of gas flow rate, and defect is that ultrasonic transducer is located in runner, can lead
It causes flow field uneven, therefore increases vane type rectifying component stream field in air inlet/outlet and rectified, vane type rectifying component installation
The case where mode is relative complex, and flow passage structure or diffusion chamber insufficient space are directly entered without diffusion chamber to fluid, rectification
Effect is undesirable.
Utility model content
The utility model provides a kind of flow passage structure based on ultrasonic wave principle and the stream comprising this based on ultrasonic wave principle
The gas flowmeter scale of road structure, including radome fairing, inner tube assembly and third component pass through drawing for radome fairing and inner tube assembly
Stream, keeps the air-flow between the first, second ultrasonic transducer more steady, improves measurement accuracy.
First aspect:
The utility model discloses a kind of flow passage structure based on ultrasonic wave principle, the chamber for accommodating tested gas including one
Body, the cavity both ends open, respectively the first opening and the second opening, the cavity include: to be arranged at the cavity
The air inlet of one end；
One radome fairing,
One inner tube assembly；
And one be arranged at the cavity the other end gas outlet,
The gas outlet is the second opening of the cavity.
Further, the radome fairing is located at first opening, and the radome fairing includes the first ultrasonic transducer
Mounting groove, first annular baffle and the first annulus, the first ultrasonic transducer mounting groove is interior to be equipped with the first ultrasonic wave transducer
Device, the first ultrasonic transducer mounting groove are connected with first annulus by the first annular baffle, and described
The internal diameter of one ring baffle is equal to the outer diameter of the first ultrasonic transducer mounting groove, and the outer diameter of first annulus is less than institute
State the internal diameter of cavity；
Said inner tube component includes an inner tube and the second ring baffle, and the inlet end of said inner tube extends in the first annulus
To receive the tested gas entered from the radome fairing, the second ring baffle is arranged at the tube wall close to said inner tube outlet side
On, the outer diameter of second ring baffle is equal to the internal diameter of the cavity, and said inner tube component is installed by the second ring baffle
In the cavity；
Third component is equipped at the gas outlet, the third component includes the installation of one second ultrasonic transducer
Slot, a third annulus and several pillars, the second ultrasonic transducer mounting groove is interior equipped with the second ultrasonic transducer, described
Second ultrasonic transducer mounting groove is connected by pillar described in several with the third annulus, outside the third annulus
Diameter is equal to the internal diameter of the cavity.
Further, the center of first ultrasonic transducer, said inner tube and second ultrasonic transducer
It is located along the same line.
Further, the first ultrasonic transducer mounting groove is integrated with first annulus and first annular baffle
Molding structure.
Further, said inner tube inlet end is bent outwardly and keeps certain radian, and said inner tube inlet end is outside
The outer section of crooked radian and the angle of said inner tube airintake direction are less than or equal to 45 °.
Further, said inner tube cross section is circle.
Further, said inner tube component further includes one second annulus, said inner tube and second annulus described in
Second ring baffle is connected, and said inner tube is connected with the cavity by second annulus.
Further, recessed in the peripherally disposed annular of the cavity inner wall close to the gas outlet side
Slot, to form the installation position of second annulus and the third annulus.
Further, position opposite with second annulus and the third annulus on annular groove setting
Groove, the groove are located at the bottom of the annular groove, while opposite on second annulus and the third annulus
The position answered is provided with protrusion, and second annulus and third circle are realized by the cooperation of the groove and the protrusion
Ring in the relatively fixed of circumferencial direction.
Further, the thickness of the third annulus and outer diameter are identical as second annulus.
Further, the air inlet is the first opening of the cavity, and the outer diameter of the first annular baffle is less than institute
The internal diameter of cavity is stated, the radome fairing is fixedly connected by being set to several pillars on its surface with the cavity.
Further, the air inlet is located on the tube wall of the cavity, and the center line of the air inlet with it is described
The center line intersection of first opening of cavity, the outer diameter of the first annular baffle are equal to the internal diameter of the cavity, the rectification
Cover is fixedly connected by the first annular baffle with the cavity.
Further, the radome fairing further includes the 4th annulus, and the outer diameter of the first annular baffle is less than the cavity
Internal diameter, the radome fairing and the cavity be attached by the 4th annulus, the first ultrasonic transducer installation
Slot and the 4th annulus are attached by several pillars.
Further, said inner tube component is fixedly connected with cavity by second ring baffle, second annular
Baffle and the cavity are integrally formed, and said inner tube is nested in the inner ring of second ring baffle.
Further, on the cavity inner wall close to the air inlet side and the gas outlet side circumferentially
Direction is provided with an annular groove, to form the installation position of the third annulus and the 4th annulus.
Further, position opposite with the 4th annulus and the third annulus on the annular groove is respectively provided with
Fluted, the groove is located at the bottom of the annular groove, while opposite on the 4th annulus and the third annulus
The position answered is provided with protrusion, by the cooperation of the groove and the protrusion to realize the 4th annulus and third circle
Ring is in the relatively fixed of circumferencial direction.
Second aspect: the utility model discloses a kind of gas flowmeter scale, the gas flowmeter scale includes this
Any flow passage structure based on ultrasonic wave principle in utility model first aspect and its optional embodiment.
The utility model has the beneficial effects that should flow passage structure based on ultrasonic wave principle include cavity, inner tube assembly and the
Three components overcome ultrasonic wave transducer in the flow passage structures such as V-type, W type and N-type using the flow passage structure based on ultrasonic wave principle
The ultrasonic signal that device effective distance is short, emits will cause certain loss of signal, and the sectional area of runner after reflection
It is bigger, the gas flow rate in runner can be reduced, the disadvantage for causing measurement accuracy not high passes through drawing for radome fairing and inner tube assembly
Stream, keeps the air-flow between ultrasonic transducer more steady, improves measurement accuracy.
Detailed description of the invention
Fig. 1 is the transverse sectional view of flow passage structure of the utility model embodiment one based on ultrasonic wave principle；
Fig. 2 is the transverse sectional view of the radome fairing in Fig. 1；
Fig. 3 is enlarged drawing at the A of Fig. 2；
Fig. 4 is the left view of radome fairing in Fig. 1；
Fig. 5 is the transverse sectional view of inner tube in Fig. 1；
Fig. 6 is enlarged drawing at B in Fig. 5；
Fig. 7 is third component transverse sectional view in Fig. 1；
Fig. 8 is the transverse sectional view of third component in the utility model embodiment one；
Fig. 9 is the transverse sectional view of flow passage structure of the utility model embodiment two based on ultrasonic wave principle；
Figure 10 is the transverse sectional view of flow passage structure of the utility model embodiment three based on ultrasonic wave principle.
In figure: 1, cavity 11, groove 2, air inlet 3, radome fairing 31, the first ultrasonic transducer mounting groove 311,
First ultrasonic transducer 32, first annular baffle 33, the first annulus 34, the 4th annulus 4, pillar 5, inner tube assembly
51, inner tube 511, inner tube inlet end 52, the second ring baffle 53, the second annulus 6, gas outlet 7, third component 71,
Two ultrasonic transducer mounting grooves 711, the second ultrasonic transducer 72, third annulus 73, raised 8, annular groove.
Specific embodiment
It is practical new to this below in conjunction with attached drawing to keep the purpose of this utility model, technical solution and advantage clearer
Type embodiment is further described.
Embodiment one
Referring to FIG. 1, the utility model discloses a kind of flow passage structure based on ultrasonic wave principle, it is commonly used in oxygen flow
Metering or anesthetic gases flow measurement, the cavity 1 for accommodating tested gas including one, 1 both ends open of cavity, respectively
The first opening and the second opening, and the generally circular in cross section design in 1 cross section of cavity, the first opening of cavity 1, for for tested gas
Body flows into, the air inlet 2 as entire cavity 1, and a radome fairing 3 is equipped at the air inlet 2, and the radome fairing 3 is used for quilt
It surveys gas to be buffered and rectified, the radome fairing 3 includes the first ultrasonic transducer mounting groove 31, first ultrasonic waves
The first ultrasonic transducer 311 can be equipped in device mounting groove 31.The radome fairing 3 is additionally provided with first annular baffle 32 and first
Annulus 33, in the present embodiment, the outer diameter of the first annular baffle 32 are less than the internal diameter of the cavity 1, first ultrasound
Wave transducer mounting groove 31 and first annulus 33 are connected and are integrally formed by the first annular baffle 32, and described the
The outer diameter of one annulus 33 is less than the internal diameter of cavity 1, ensure that the gas entered from the air inlet 2 of cavity 1 can be by the first ring
The drainage of shape baffle 32 enters in the space between the first annulus 33 and cavity 1.
Please refer to Fig. 2 and Fig. 4, the center of 31 center of the first ultrasonic transducer mounting groove and cavity 1 is located at same
On straight line, and in the present embodiment, on 31 outer wall of the first ultrasonic transducer mounting groove be provided with several pillars 4, pillar 4 it is another
One end is connected with 1 inner wall of cavity, to realize the fixation between radome fairing 3 and cavity 1.
Consolidating between radome fairing 3 and cavity 1 can certainly be realized by the way that several pillars are arranged on the first annulus 33
It is fixed.It is not particularly limited herein.
The internal diameter of the first annular baffle 32 is equal to the outer diameter of the first ultrasonic transducer mounting groove 31, Neng Goubao
Card is located at the ultrasonic signal of the first ultrasonic transducer 311 transmitting in the first ultrasonic wave mounting groove 31 not by first annular gear
Plate 32 is blocked.
Please refer to Fig. 5, Fig. 6, be additionally provided with an inner tube assembly 5 in the cavity 1, said inner tube component 5 include an inner tube 51,
Second ring baffle 52 and the second annulus 53.Second opening of cavity 1 is used as entire for flowing out cavity 1 for tested gas
The gas outlet 6 of cavity 1, the center of inner tube 51 and the center of cavity 1 are located along the same line, in the present embodiment, said inner tube
51 inlet end 511 is bent outwardly and keeps certain radian, to improve charge air flow, make into inner tube 51 air-flow more
Steadily.It is small that the inlet end 511 of said inner tube 51, which is bent outwardly the outer section of radian and the angle of 51 airintake direction of said inner tube,
In or equal to 45 °.Inner tube inlet end 511 is horn-like in the present embodiment, and the inlet end 511 of said inner tube 51 is bent outwardly arc
The outer section of degree and the angle of 51 airintake direction of said inner tube are a, and a≤45 °, certain inner tube inlet end 511 is also possible to straight tube
Shape does not limit this.
Between inner tube inlet end 511 extends in the first annulus 33, and holding is certain between the first ultrasonic transducer 311
Away to realize the tested gas for being connected with the radome fairing 3 and entering with reception from the radome fairing 3, it is preferable that described interior
The second ring baffle 52 of integrated setting on the outlet side tube wall of pipe 51, the outlet side tube wall of certain said inner tube 51 can also be with
By other modes such as bondings to realize the connection with the second ring baffle 52, it is not limited here.Second ring baffle 52 with
Second annulus 53 is connected, and the second ring baffle 52 is connected with each other with inner tube 51, thus by the air inlet of 51 outer chamber 1 of inner tube
Mouth 2 and gas outlet 6 are separated, and then the tested gas between first annulus 33 and cavity 1 can be guided to first
Space in annulus 33, and be drained in inner tube 51；It is also ensured the tested gas that flows out from inner tube 51 from outlet simultaneously
Mouth 6 flows out.
Preferably, in order to facilitate the installation of and guarantee the leakproofness of the second ring baffle 52, the annular of said inner tube 51, second
Baffle 52 and the second annulus 53 are designed to be integrally formed.Certain said inner tube 51, the second ring baffle 52 and the second circle
Ring 53 can be attached in a manner of bonding etc., it is not limited here.
Fig. 1,2 and Fig. 3 is please referred to, in the side close to gas outlet 6 peripherally disposed one on the inner wall of cavity 1
Annular groove 8, annular groove 8 form the installation position of inner tube assembly 5, prevent inner tube assembly 5 from sliding to 2 direction of air inlet, recessed
The radial depth of slot 8 is identical as the thickness of the second annulus 53, so that 5 inner wall of inner tube assembly and 1 inner wall of cavity after installation are horizontal
Alignment, 51 center of inner tube is located along the same line with 1 center of cavity.
Third component 7 is equipped at the gas outlet 6, referring to FIG. 7, the third component 7 includes one second ultrasonic wave
Energy converter mounting groove 71, a third annulus 72 and several pillars 4, in the present embodiment, the second ultrasonic transducer mounting groove
71 outer walls are fixed using three pillars 4 with third annulus 72, thus realize that third component 7 is integrally formed, third annulus 72
Outer diameter be equal to the internal diameter of cavity 1, third component 7 is realized and the connection of cavity 1, second ultrasound by third annulus 72
The second ultrasonic transducer 711 is equipped in wave transducer mounting groove 71, it is preferable that the outer diameter and thickness of the third annulus 72
It is identical as the second annulus 53, it ensure that third component 7 after inner tube assembly 5 is installed, can also smoothly be installed into chamber
In body 1, and 72 inner wall of third annulus, 53 inner wall of the second annulus and the equal horizontal alignment of 1 inner wall of cavity.But it does not limit this.The
Space between three annulus 72 and the second ultrasonic transducer mounting groove 71 is separated into three outlet passageways, quilt by three pillars 4
It surveys from flowing out to gas outlet 6 in three outlet passageways and finally flowing out outside runner after gas is flowed out through inner tube 51, second is annular
Baffle 52 can be by the gas barrier of outflow, it is ensured that it will not be back to air inlet 2.
Fig. 2 and Fig. 8 are please referred to, the second annulus 53 and third annulus 72 are sliding in circumferencial direction relative to cavity 1 in order to prevent
Dynamic, the position opposite with the second annulus 53 and third annulus 72 is provided with groove 11 on annular groove 8, and groove 11 is located at ring
The bottom of connected in star 8, while corresponding position is provided with protrusion 73 on the second annulus 53 and third annulus 72, by recessed
The cooperation of slot 11 and protrusion 73 realize the second annulus 53 and third annulus 72 in the relatively fixed of circumferencial direction.
The center of first ultrasonic transducer 311, inner tube 51 and the second ultrasonic transducer 711 is located at same straight line
On, therefore the ultrasonic signal of the first ultrasonic transducer 311 transmitting can be propagated in inner tube 51, reach the second ultrasonic waves
Energy device 711 is simultaneously received by the second ultrasonic transducer 711, similarly, the ultrasonic signal of the second ultrasonic transducer 711 transmitting
It can also propagate in inner tube 51, reach the first ultrasonic transducer 311 and be received by the first ultrasonic transducer 311, thus
The first ultrasonic transducer 311 and the second ultrasonic transducer 711 is set to form reciprocal signal.
Flow passage structure based on ultrasonic wave principle further includes a circuit board, and circuit board includes processing chip, and processing chip is used
In the flow for calculating tested gas in runner according to testing result.
The circular design of inner tube 51 can reduce the sectional area of gas chamber simultaneously, improve the flow velocity of tested gas.
Detection of gas flow rate process in the flow passage structure based on ultrasonic wave principle is as follows: being tested gas from the air inlet
Mouthfuls 2 enter in cavity 1, enter the space between cavity 1 and the first annulus 33 after then draining by radome fairing 3, and by the
Second ring baffle 52 changes gas flow direction after stopping, and is entered to by the space between the first annulus 33 and inner tube 51 interior
In pipe 51, the air-flow entered in inner tube 51 after the air-flow direction of propagation is varied multiple times becomes very steady, is tested gas from interior
It flows out outside runner after being flowed out in pipe 51 by gas outlet 6, and due to the blocking of the second ring baffle 52, can prevent from inner tube 51
The airflow reflux of outflow is to air inlet 2.
First ultrasonic transducer 311 emits ultrasonic signal, and the ultrasonic signal of transmitting enters inner tube 51, and in inner tube
It is propagated in 51 along the direction of air-flow, ultrasonic signal reaches the outlet of inner tube 51 after time T1, by the second ultrasonic waves
It can the reception of device 711.
Second ultrasonic transducer 711 emits ultrasonic signal, and the ultrasonic signal of transmitting enters inner tube 51, and in inner tube
It is propagated in 51 against the direction of air-flow, ultrasonic signal reaches the entrance of inner tube 51 after time T2, by the first ultrasonic waves
It can the reception of device 311.
Processing chip can calculate between T1 and T2 according to the distance between two ultrasonic transducers L, T1 and T2
The spread speed of time difference and ultrasonic signal in a fluid.It is propagated in a fluid according to the sectional area of inner tube and ultrasonic wave
Time difference between flow velocity and T1 and T2 can calculate the gas flow for flowing through inner tube, that is, flow through the gas stream of runner
Amount.
Embodiment two
Referring to FIG. 9, the utility model discloses a kind of flow passage structure based on ultrasonic wave principle, and disclosed in embodiment one
A kind of difference of the flow passage structure based on ultrasonic wave principle is, the position of air inlet 2 is different and the position of radome fairing 3 and its
Different from the connection type of cavity 1, air inlet 2 is arranged on the tube wall of cavity 1 in the present embodiment, and the air inlet
2 center line intersects with the center line of the first opening of cavity 1, and the present embodiment preferably shows the center line and chamber of air inlet 2
The central axis of first opening of body 1 is tested gas and is entered by the air inlet 2 being located on 1 side wall of cavity.
First ultrasonic transducer mounting groove 31 of radome fairing 3 is located at the outside of cavity 1, and first annular baffle 32 is located at
One opening of cavity 1, and it realizes the connection of radome fairing 3 and cavity 1, first annular gear by first annular baffle 32
The outer diameter of plate 32 is equal to the internal diameter of cavity 1, and without branch on the first ultrasonic transducer mounting groove 31 and the first annulus 33
Column, radome fairing 3 and cavity 1 and first annular baffle 32 are integrally formed, so as to pass through from the tested gas that air inlet 2 enters
Space circulation between first annulus 33 and cavity 1 is tested gas and is changed gas flowing side after the barrier of the second ring baffle 52
To, and inner tube 51 is flowed by the space between the first annulus 33 and inner tube 51, and reach third component 7 simultaneously after inner tube 51
Finally flowed out outside runner from gas outlet 6.
Embodiment three
Referring to FIG. 10, the utility model discloses a kind of flow passage structure based on ultrasonic wave principle, with one disclosure of embodiment
The difference of flow passage structure based on ultrasonic wave principle a kind of be, the structure and mounting means of radome fairing 3 and inner tube assembly 5
Different, in the present embodiment, radome fairing 3 and cavity 1 are not integrally formed, and radome fairing 3 is attached with cavity 1 by annulus
Rather than be attached by pillar, said inner tube 51 is fixedly connected with the cavity by second ring baffle 52, or
Person is attached by the second annulus 53, it is not limited here.
Specifically, inner tube assembly includes inner tube 51 and the second ring baffle 52, second ring baffle 52 and the chamber
Body 1 is integrally formed, and said inner tube 51 is nested in the inner ring of second ring baffle 52, to realize inner tube 51 and cavity
Fixation between 1.Certain inner tube 51 can also be attached with cavity 1 by the second annulus 53, it is not limited here.
Radome fairing 3 further includes one the 4th annulus 34 simultaneously, and radome fairing 3 is attached by the 4th annulus 34 with cavity 1, the
One ultrasonic transducer mounting groove, 31 outer wall connects the 4th annulus 34 by several pillars 4, close to 2 side of air inlet and
Peripherally disposed annular groove 8 on 1 inner wall of the cavity of 6 side of gas outlet, to form the third
The installation position of annulus 72 and the 4th annulus 34, it is preferable that the outer diameter of the 4th annulus 34 and the third annulus 72
Outer diameter is identical, and the third annulus 72 is identical with the thickness of the 4th annulus 34, and radial deep with the annular groove 8
It spends identical, therefore can guarantee that radome fairing 3 and third component 7 can smoothly be installed in cavity 1, and the third annulus 72
The inner wall and the equal horizontal alignment of 1 inner wall of cavity of inner wall, the 4th annulus 34.
Meanwhile the position opposite with third annulus 72 and the 4th annulus 34 is provided with groove 11 on annular groove 8,
Corresponding position is provided with protrusion 73 on third annulus 72 and the 4th annulus 34 simultaneously, passes through groove 11 and protrusion 73
Cooperation realizes third annulus 72 and the 4th annulus 34 in the relatively fixed of circumferencial direction.
Second ring baffle 52 is directly fixedly installed on cavity 1, so that the tested gas entered from air inlet 2 passes through institute
After stating the space between the 4th annulus 34 and the first ultrasonic transducer mounting groove 31, pass through the first annulus 33 and cavity 1
Between space circulation, tested gas is changed gas flow direction after the barrier of the second ring baffle 52, and passes through the first annulus
Space between 33 and inner tube 51 flows into inner tube 51, and reaches third component 7 after inner tube 51 and finally flow out from gas outlet 6
Outside runner.
Specific embodiment described in the utility model is only to give an example to the spirit of the present invention.This is practical
Novel person of ordinary skill in the field can make various modifications or additions to the described embodiments or adopt
It is substituted with similar mode, but without departing from the spirit of the present application or surmounts model defined in the appended claims
It encloses.
In the absence of conflict, the feature in embodiment and embodiment herein-above set forth can be combined with each other.The above institute
The preferred embodiment for stating only the utility model, is not intended to limit the utility model, all spirit and original in the utility model
Within then, any modification, equivalent replacement, improvement and so on be should be included within the scope of protection of this utility model.
Claims (17)
1. a kind of flow passage structure based on ultrasonic wave principle, the cavity for accommodating tested gas including one, which is characterized in that the chamber
Body both ends open, respectively the first opening and the second opening, the cavity include: the air inlet for being arranged at one end of the cavity
Mouthful；
One radome fairing,
One inner tube assembly,
And one be arranged at the cavity the other end gas outlet,
The gas outlet is the second opening of the cavity.
2. as described in claim 1 based on the flow passage structure of ultrasonic wave principle, it is characterised in that:
The radome fairing is located at first opening, and the radome fairing includes the first ultrasonic transducer mounting groove, the first ring
Shape baffle and the first annulus, the first ultrasonic transducer mounting groove is interior equipped with the first ultrasonic transducer, described the first to surpass
Acoustic wave transducer mounting groove is connected with first annulus by the first annular baffle, the first annular baffle it is interior
Diameter is equal to the outer diameter of the first ultrasonic transducer mounting groove, and the outer diameter of first annulus is less than the internal diameter of the cavity；
Said inner tube component includes an inner tube and the second ring baffle, and the inlet end of said inner tube extends in the first annulus to connect
The tested gas entered from the radome fairing is received, the second ring baffle is arranged on the tube wall of inner tube outlet side, described
The outer diameter of second ring baffle is equal to the internal diameter of the cavity, and said inner tube component is mounted on cavity by the second ring baffle
It is interior；
Third component is equipped at the gas outlet, the third component includes one second ultrasonic transducer mounting groove, one the
Three annulus and several pillars, the second ultrasonic transducer mounting groove is interior equipped with the second ultrasonic transducer, described the second to surpass
Acoustic wave transducer mounting groove is connected by pillar described in several with the third annulus, and the outer diameter of the third annulus is equal to
The internal diameter of the cavity.
3. as claimed in claim 2 based on the flow passage structure of ultrasonic wave principle, it is characterised in that: first ultrasonic wave transducer
The center of device, said inner tube and second ultrasonic transducer is located along the same line.
4. as claimed in claim 2 based on the flow passage structure of ultrasonic wave principle, it is characterised in that: first ultrasonic wave transducer
Device mounting groove is an integral molding structure with first annulus and first annular baffle.
5. as claimed in claim 2 based on the flow passage structure of ultrasonic wave principle, it is characterised in that: said inner tube inlet end is outside
It is bent and keeps certain radian, said inner tube inlet end is bent outwardly outer section and the said inner tube airintake direction of radian
Angle is less than or equal to 45 °.
6. as claimed in claim 2 based on the flow passage structure of ultrasonic wave principle, it is characterised in that: said inner tube cross section is circle
Shape.
7. as claimed in claim 2 based on the flow passage structure of ultrasonic wave principle, it is characterised in that: said inner tube component further includes
One second annulus, said inner tube are connected with second annulus by second ring baffle, said inner tube and the chamber
Body is connected by second annulus.
8. as claimed in claim 7 based on the flow passage structure of ultrasonic wave principle, it is characterised in that: close to the gas outlet one
The peripherally disposed annular groove of the cavity inner wall of side, to form second annulus and the third annulus
Installation position.
9. as claimed in claim 8 based on the flow passage structure of ultrasonic wave principle, it is characterised in that: on the annular groove with
Second annulus and the opposite position of the third annulus are provided with groove, and the groove is located at the bottom of the annular groove
Portion, while corresponding position is provided with protrusion on second annulus and the third annulus, passes through the groove and institute
State the cooperation of protrusion with realize second annulus and the third annulus in the relatively fixed of circumferencial direction.
10. as claimed in claim 7 based on the flow passage structure of ultrasonic wave principle, it is characterised in that: the thickness of the third annulus
Degree and outer diameter are identical as second annulus.
11. the flow passage structure based on ultrasonic wave principle as described in any claim in claim 7-10, it is characterised in that:
The air inlet is the first opening of the cavity, and the outer diameter of the first annular baffle is less than the internal diameter of the cavity, described
Radome fairing is fixedly connected by being set to several pillars on its surface with the cavity.
12. the flow passage structure based on ultrasonic wave principle as described in any claim in claim 7-10, it is characterised in that:
The air inlet is located on the tube wall of the cavity, and in the first opening of the center line of the air inlet and the cavity
The intersection of heart line, the outer diameter of the first annular baffle are equal to the internal diameter of the cavity, and the radome fairing passes through described first annular
Baffle is fixedly connected with the cavity.
13. the flow passage structure based on ultrasonic wave principle as described in any claim in claim 2-7, it is characterised in that:
The radome fairing further includes the 4th annulus, and the outer diameter of the first annular baffle is less than the internal diameter of the cavity, the radome fairing
It is attached with the cavity by the 4th annulus, the first ultrasonic transducer mounting groove and the 4th annulus are logical
Several pillars are crossed to be attached.
14. as claimed in claim 13 based on the flow passage structure of ultrasonic wave principle, it is characterised in that: said inner tube component and chamber
Body is fixedly connected by second ring baffle, and second ring baffle and the cavity are integrally formed, said inner tube quilt
It is nested in the inner ring of second ring baffle.
15. as claimed in claim 13 based on the flow passage structure of ultrasonic wave principle, it is characterised in that: close to the air inlet
Peripherally disposed annular groove on the cavity inner wall of side and the gas outlet side, to form described
The installation position of three annulus and the 4th annulus.
16. as claimed in claim 15 based on the flow passage structure of ultrasonic wave principle, it is characterised in that: on the annular groove
The position opposite with the 4th annulus and the third annulus is provided with groove, and the groove is located at the annular groove
Bottom, while corresponding position is provided with protrusion on the 4th annulus and the third annulus, by the groove and
The cooperation of the protrusion is to realize the 4th annulus and the third annulus in the relatively fixed of circumferencial direction.
17. a kind of gas flowmeter scale, it is characterised in that: the gas flowmeter scale includes as appointed in claim 1-16
Based on the flow passage structure of ultrasonic wave principle described in one.
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| CN201821054723.XU CN208520420U (en) | 2018-07-04 | 2018-07-04 | A kind of flow passage structure and gas flowmeter scale based on ultrasonic wave principle |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108593026A (en) * | 2018-07-04 | 2018-09-28 | 湖北锐意自控系统有限公司 | A kind of flow passage structure and gas flowmeter scale based on ultrasonic wave principle |
| JP2021526642A (en) * | 2019-03-16 | 2021-10-07 | オイル アンド ガス メータリング エクイップメント エス．アール．オー． | Small ultrasonic flowmeter especially for gas |
| CN113701834A (en) * | 2021-07-29 | 2021-11-26 | 上海中核维思仪器仪表有限公司 | Gas ultrasonic flowmeter |
-
2018
- 2018-07-04 CN CN201821054723.XU patent/CN208520420U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108593026A (en) * | 2018-07-04 | 2018-09-28 | 湖北锐意自控系统有限公司 | A kind of flow passage structure and gas flowmeter scale based on ultrasonic wave principle |
| JP2021526642A (en) * | 2019-03-16 | 2021-10-07 | オイル アンド ガス メータリング エクイップメント エス．アール．オー． | Small ultrasonic flowmeter especially for gas |
| JP7085027B2 (en) | 2019-03-16 | 2022-06-15 | オイル アンド ガス メータリング エクイップメント エス．アール．オー． | Small ultrasonic flowmeter for gas |
| CN113701834A (en) * | 2021-07-29 | 2021-11-26 | 上海中核维思仪器仪表有限公司 | Gas ultrasonic flowmeter |
| CN113701834B (en) * | 2021-07-29 | 2023-04-07 | 上海中核维思仪器仪表股份有限公司 | Gas ultrasonic flowmeter |
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