CN115655394B - Novel ultrasonic gas flowmeter unit and gas meter using same - Google Patents
Novel ultrasonic gas flowmeter unit and gas meter using same Download PDFInfo
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- CN115655394B CN115655394B CN202211138012.1A CN202211138012A CN115655394B CN 115655394 B CN115655394 B CN 115655394B CN 202211138012 A CN202211138012 A CN 202211138012A CN 115655394 B CN115655394 B CN 115655394B
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- 238000009434 installation Methods 0.000 claims description 32
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- 238000011144 upstream manufacturing Methods 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 92
- 238000005259 measurement Methods 0.000 description 16
- 230000002829 reductive effect Effects 0.000 description 10
- 238000010586 diagram Methods 0.000 description 6
- 238000004088 simulation Methods 0.000 description 6
- 239000002737 fuel gas Substances 0.000 description 5
- 230000036961 partial effect Effects 0.000 description 4
- 230000002035 prolonged effect Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 2
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- 239000012530 fluid Substances 0.000 description 2
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- 238000012360 testing method Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
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- 210000001320 hippocampus Anatomy 0.000 description 1
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- 238000007789 sealing Methods 0.000 description 1
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Abstract
The invention discloses a novel ultrasonic gas flowmeter unit and a gas meter using the same, wherein the ultrasonic gas flowmeter unit comprises a runner body, the runner body comprises a first inlet and a first outlet which can be communicated with a gas outlet on the gas meter, when the first outlet is communicated with the gas outlet, the runner body is obliquely arranged so that gas enters the runner body through the inlet at an obtuse angle and is discharged from the gas outlet, a first mounting position and a second mounting position for mounting a transducer are arranged on the side wall of the same side of the runner body, and a reflecting plate is arranged on the side wall of the runner body opposite to the first mounting position and the second mounting position; the gas meter comprises a shell, a valve and an ultrasonic gas flowmeter unit. The invention has reasonable structure, can increase the length of the measuring section in a limited space on one hand, enhances the flow stability of gas, and reduces the influence of the downstream flow field on the gas disturbance of the upstream measuring section on the other hand by arranging the obtuse angle elbow, thereby reducing the fluctuation of the gas disturbance and being beneficial to improving the measuring precision.
Description
Technical Field
The invention relates to the field of gas flow measuring devices, in particular to a novel ultrasonic gas flowmeter unit and a gas meter using the same.
Background
The ultrasonic gas meter has the outstanding advantages of wide measuring range, small pressure loss, no movable part, high measuring precision and the like, is a novel instrument with future development potential, and in the ultrasonic measurement technology, the stability of the air flow in the measuring section of the gas meter is an important factor influencing the measuring precision, generally speaking, the more stable the air flow is, the smaller the disturbance is, the more favorable for improving the measuring precision is, meanwhile, the influence of the existing air supply structure such as the gas meter is limited, the center distance between an inlet and an outlet of the ultrasonic gas meter is limited, and the stability of gas flow is realized in a limited space, so that the measuring precision, the measuring section and the reliability of the existing ultrasonic gas meter still need to be further improved.
Disclosure of Invention
The invention discloses a novel ultrasonic gas flowmeter unit and a gas meter using the same, which solve the technical problems of poor air flow stability, large disturbance and low measurement precision of a measurement section in an ultrasonic gas flowmeter in the prior art and have the technical effects of reasonable structure, good air flow stability of the measurement section and contribution to improving the measurement precision. The technical scheme adopted is as follows:
The utility model provides a novel ultrasonic wave gas flowmeter unit, includes the runner body, the runner body includes first entry and can with the first export of gas export intercommunication on the gas table, and works as when first export and gas export intercommunication, the runner body slope sets up so that the gas is the obtuse angle and gets into the runner body through the entry and follow the export and discharge, be equipped with first installation position and the second installation position that are used for installing the transducer on the homonymy lateral wall of runner body, with be equipped with the reflecting plate on the runner body lateral wall that first installation position and second installation position are relative.
On the basis of the technical scheme, the first inlet end of the flow channel body is coaxially provided with a first expanding pipe, the first outlet end of the fluid body is provided with a second expanding pipe, and the first outlet is communicated with the fuel gas outlet through the second expanding pipe.
On the basis of the technical scheme, the first diameter-enlarging pipe comprises a first reducing pipe section and a first diameter-enlarging pipe section which are sequentially arranged along the air inlet direction.
On the basis of the technical scheme, the second diameter-enlarging pipe comprises a second sizing pipe section and a second reducing pipe section which are sequentially arranged along the air inlet direction, or the second diameter-enlarging pipe comprises a second sizing pipe section; and the joint of the second expanding pipe and the runner body is in smooth transition.
On the basis of the technical scheme, the novel flow channel structure further comprises a first vortex sheet and a second vortex sheet, wherein the first vortex sheet is arranged at the tail end port of the first installation position, the second vortex sheet is arranged at the tail end port of the second installation position, the first vortex sheet and the second vortex sheet are arc-shaped sheets, the first vortex sheet partially covers the tail end port of the first installation position and is close to the first outlet end of the flow channel body, and the second vortex sheet partially covers the tail end port of the second installation position and is close to the first outlet end of the flow channel body.
On the basis of the technical scheme, the novel vortex device further comprises a third vortex sheet and a fourth vortex sheet, wherein the third vortex sheet is arranged opposite to the first vortex sheet and partially covers the end opening of the first safety position, the third vortex sheet is arranged close to the first inlet, the fourth vortex sheet is arranged opposite to the second vortex sheet and partially covers the end opening of the second installation position, and the fourth vortex sheet is arranged close to the first inlet.
On the basis of the technical scheme, two opposite end surfaces of the first vortex sheet and the third vortex sheet are two cambered surfaces, and the arc openings of the two cambered surfaces face the axis of the first installation position; two opposite end surfaces of the second vortex sheet and the fourth vortex sheet are two cambered surfaces, and the arc openings of the two cambered surfaces face the axis of the second installation position.
On the basis of the technical scheme, the inner wall surface of the first vortex sheet and the inner wall surface of the flow channel body are on the same curved surface, and the inner wall surface of the second vortex sheet and the inner wall surface of the flow channel body are on the same curved surface.
On the basis of the technical scheme, the measuring section of the flow channel body is internally provided with a plurality of rectifying plates in parallel, and the measuring section of the flow channel body is divided into a plurality of mutually independent chambers by the plurality of rectifying plates.
On the basis of the technical scheme, the rectifying piece axially extends to 5-8 mm beyond the end port of the first installation position or the end port of the second installation position.
On the basis of the technical scheme, the reflecting plate is obliquely arranged and has an outward inclined angle along the gas flow direction.
On the basis of the technical scheme, the reflecting plate extends forwards and backwards and forms part of the side wall of the measuring section of the flow channel body.
On the basis of the technical scheme, the angle of outwards inclining the reflecting plate along the gas flowing direction is 5-10 degrees, and the incidence angle of the transducer in the first installation position arranged close to the first inlet is 40-60 degrees.
On the basis of the technical scheme, the ultrasonic gas flow meter comprises a shell, a gas valve and the ultrasonic gas flow meter unit, wherein the top surface of the shell is provided with a gas inlet and a gas outlet, the gas valve is arranged in the shell and can be communicated with the gas inlet, the outlet of the gas valve is arranged avoiding the first inlet, and the first outlet is communicated with the gas outlet and the flow channel body is obliquely arranged in the shell so that gas enters the flow channel body from the first inlet at an obtuse angle and is discharged from the gas outlet.
On the basis of the technical scheme, the obtuse angle between the axis of the ultrasonic gas flowmeter unit and the gas outlet is 120-150 degrees.
Advantageous effects
According to the ultrasonic gas flowmeter, the ultrasonic gas flowmeter can be obliquely arranged in the gas flowmeter so that gas enters the ultrasonic gas flowmeter at an obtuse angle for measurement, so that the flow length of the gas in the flow channel body can be greatly prolonged in a limited space, the length of a measuring section of the flow channel body can be prolonged, the gas disturbance of the measuring section can be reduced, and the measurement accuracy can be improved;
In addition, the first inlet and the first outlet of the runner body are respectively provided with a first expanding pipe and a second expanding pipe, the arrangement of the first expanding pipes slows down the condition that the flow velocity of gas at the inlet is unevenly distributed along the radial direction, the flow velocity of gas at the measuring section in the runner body is improved, when the gas is discharged through the second expanding pipes, the flow velocity is reduced to avoid influencing an upstream measuring section, in addition, the arrangement of the bent pipe reduces the change degree of the flow direction of the gas, the pressure loss at the bent pipe can be effectively reduced, and meanwhile, the arrangement of the first expanding pipes and the second expanding pipes enables the flow velocity of the flow channel body to form a reducing section to be improved, so that the flow velocity measuring device is well applicable to the detection of small-flow gas, and meanwhile, the measurement precision is improved.
The arrangement of the vortex sheet can slow down the vortex of gas at two installation positions, avoid the disturbance of the gas flow in the measuring section and further improve the measuring precision; the plurality of rectifying sheets enable the fuel gas to form a laminar flow state in the measuring section, so that disturbance on the air flow can be further reduced.
The reflecting plate is obliquely arranged, so that the measuring sound path can be effectively prolonged in a limited space structure, the design is ingenious, the time difference between forward flow transmission and reverse flow transmission of ultrasonic waves between two transducers can be improved, and the measuring precision is further improved. And when the reflecting plate is inclined by 5-10 degrees, the interference of the characteristic distribution of the gas flow field to the measurement process can be effectively avoided, and meanwhile, the good measurement precision can be ensured.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It is apparent that the drawings in the following description are only one embodiment of the present invention, and that other embodiments of the drawings may be derived from the drawings provided without inventive effort for a person skilled in the art.
Fig. 1: a schematic structural view of a perspective view of an ultrasonic gas flow meter unit in example 1;
fig. 2: a schematic structural diagram of a front view of an ultrasonic gas flow meter unit in embodiment 1;
Fig. 3: schematic cross-sectional structure of front view of ultrasonic gas flow meter unit in embodiment 1;
fig. 4: schematic cross-sectional structure in the A-A direction in fig. 2;
fig. 5: schematic partial sectional structure of perspective view of gas meter in example 1;
Fig. 6: a schematic structural diagram of a perspective view of an ultrasonic gas flow meter unit in embodiment 2;
fig. 7: a second schematic structural diagram of a perspective view of the ultrasonic gas flow meter unit in embodiment 2;
fig. 8: schematic cross-sectional structure of front view of ultrasonic gas flow meter unit in embodiment 3;
Fig. 9: when the inclination angle of the reflecting plate is 5 degrees and the flow velocity is 6m 3/h, the gas velocity in the flow channel body is in cloud image;
Fig. 10: a vector diagram of the gas velocity in the flow channel body when the inclination angle of the reflecting plate is 5 degrees and the flow velocity is 6m 3/h;
fig. 11: FIG. 10 is a partial enlarged view;
Fig. 12: the inclination angle of the reflecting plate is 8 degrees, and the flow velocity is 6m 3/h, so that the gas velocity in the flow channel body is in a cloud picture;
fig. 13: a vector diagram of the gas velocity in the flow channel body when the inclination angle of the reflecting plate is 8 degrees and the flow velocity is 6m 3/h;
fig. 14: FIG. 13 is a partial enlarged view;
Fig. 15: when the inclination angle of the reflecting plate is 10 degrees and the flow velocity is 6m 3/h, the gas velocity in the flow channel body is in cloud image;
Fig. 16: a vector diagram of the gas velocity in the flow channel body when the inclination angle of the reflecting plate is 10 degrees and the flow velocity is 6m 3/h;
Fig. 17: FIG. 16 is an enlarged partial view;
Fig. 18: the invention tests the data result on the error checking device of the GNP image type sonic nozzle method gas meter;
Detailed Description
The following description and the drawings sufficiently illustrate specific embodiments herein to enable those skilled in the art to practice them. Portions and features of some embodiments may be included in, or substituted for, those of others. The scope of the embodiments herein includes the full scope of the claims, as well as all available equivalents of the claims. The terms "first," "second," and the like herein are used merely to distinguish one element from another element and do not require or imply any actual relationship or order between the elements. Indeed the first element could also be termed a second element and vice versa. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a structure, apparatus, or device that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such structure, apparatus, or device. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a structure, apparatus or device that comprises the element. Various embodiments are described herein in a progressive manner, each embodiment focusing on differences from other embodiments, and identical and similar parts between the various embodiments are sufficient to be seen with each other.
The terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like herein refer to an orientation or positional relationship based on that shown in the drawings, merely for ease of description herein and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operate in a particular orientation, and thus are not to be construed as limiting the invention. In the description herein, unless otherwise specified and limited, the terms "mounted," "connected," and "coupled" are to be construed broadly, and may be, for example, mechanically or electrically coupled, may be in communication with each other within two elements, may be directly coupled, or may be indirectly coupled through an intermediary, as would be apparent to one of ordinary skill in the art.
Herein, unless otherwise indicated, the term "plurality" means two or more.
Herein, the character "/" indicates that the front and rear objects are an or relationship. For example, A/B represents: a or B.
Herein, the term "and/or" is an association relation describing an object, meaning that three relations may exist. For example, a and/or B, represent: a or B, or, A and B.
Example 1:
the gas meter shown in fig. 5 comprises a shell 8, a gas valve 9 and an ultrasonic gas flowmeter unit, wherein a gas inlet 81 and a gas outlet 82 are formed in the top surface of the shell 8, and the gas valve 9 is arranged in the shell 8 and can be communicated with the gas inlet 81.
As shown in fig. 1 to 3, the ultrasonic gas flowmeter unit comprises a flow channel body 1, wherein the flow channel body 1 comprises a first inlet 11 and a first outlet 12 which can be communicated with a gas outlet 82 on a gas meter, and the outlet of the gas valve 9 is arranged back to the flow channel body 1 so as to avoid the first inlet 11 of the flow channel body 1 and prevent gas from entering a measuring section of the flow channel body 1 at a high speed and disturbing the gas in the measuring section.
The first outlet 12 of the ultrasonic gas flowmeter unit is communicated with the gas outlet 82, and the ultrasonic gas flowmeter is obliquely arranged in the housing 8, specifically, an obtuse angle formed between the axis of the flow channel body 1 and the gas outlet 82 is 120-150 degrees, as shown in fig. 5, gas in the housing 8 enters the flow channel body 1 through the first inlet 11 at an obtuse angle and is discharged from the first outlet 12.
The first inlet 11 end of the flow channel body 1 is coaxially provided with a first diameter-expanding pipe 13, the first diameter-expanding pipe 13 is in a horn shape, the first outlet 12 end of the fluid body 1 is provided with a second diameter-expanding pipe 14, the second diameter-expanding pipe 14 comprises a second sizing pipe section and a second reducing pipe section which are sequentially connected along the air inlet direction, the lower part of the second reducing pipe is in a horn shape, the joint of the second sizing pipe section and the flow channel body 1 is in smooth transition, the condition that gas generates vortex at the joint of the second diameter-expanding pipe and the flow channel body 1 is reduced, and the first outlet 12 is communicated with the gas outlet 82 through the second diameter-expanding pipe 14.
The gas flow channel comprises a flow channel body 1, a first mounting position 2 and a second mounting position 3 for mounting a transducer are arranged on the side wall of the same side of the flow channel body 1, the first mounting position 2 and the second mounting position 3 are integrally formed groove bodies with the flow channel body 1, an upper cover plate is arranged at the top end of each groove body, a through hole for a power supply line to pass through is formed in each upper cover plate, and in the gas embodiment of the invention, the first mounting position 2 and the second mounting position 3 are through holes communicated with the outside, and the transducer is mounted in the first mounting position 2 and the second mounting position 3 through a sealing structure; wherein the transducer is the prior art, and can be selected according to the need by the person skilled in the art, and is not described here again; the length section of the flow body 1, which covers the first installation position 2 and the second installation position 3, is a measurement section.
As shown in fig. 3, a reflecting plate 4 is disposed on a side wall of the flow channel body 1 opposite to the first mounting position 2 and the second mounting position 3, wherein the reflecting plate 4 is obliquely disposed and has an angle of being inclined outwards along the gas flow direction, the angle of the reflecting plate 4 being inclined outwards along the gas flow direction is 5-10 °, and correspondingly, the incident angle of the transducer in the first mounting position 2 disposed near the first inlet 11 is 40-60 °;
In order to ensure that the ultrasonic waves have stable incident and emergent angles on the reflecting plate 4 and the stability of the gas flow velocity in the flow channel body 1, on the premise of less changing the section of the measuring section, the reflecting plate 4 extends forwards and backwards and forms part of the side wall of the measuring section of the flow channel body 1 so as to reduce the influence of the section change on the inner cavity of the flow channel body 1, thus effectively prolonging the measuring sound path in a limited structural space.
Taking the flow channel body 1 of R7 as an example, when the inclination angle of the reflecting plate 4 is 5 degrees, the sound path is increased by 10 percent, and the flow field simulation analysis software is used for carrying out flow field velocity simulation analysis on the structure with the size to obtain a velocity cloud image and a velocity vector image, as shown in figures 9-11, the velocity cloud image and the velocity vector image can be obtained from figures 9-11, the velocity distribution of the flow field in the flow channel body 1 is not greatly influenced, and good measurement precision can be ensured; when the inclination angle of the reflecting plate 4 is 8 degrees, the sound path is increased by more than 10 percent, and the flow field simulation analysis software is used for carrying out flow field speed simulation analysis on the structure with the size to obtain a speed cloud image and a speed vector image, which are shown in figures 12-14, the speed distribution of the flow field in the flow channel body 1 is not greatly influenced, and good measurement accuracy can be ensured; when the inclination angle of the reflecting plate 4 is 10 degrees, the sound path is further increased, and the flow field simulation analysis software is used for carrying out flow field speed simulation analysis on the structure with the size, so that a speed cloud chart and a speed vector chart are obtained, as shown in fig. 15-17, and the speed distribution of the flow field in the flow channel body 1 is not greatly influenced, and good measurement accuracy can be ensured.
In addition, taking the flow channel body of R7 as an example, when the inclination angle of the reflecting plate 4 is 5 °, the sound path is increased by 10%, the sound path is prolonged, the measurement accuracy is high, as shown in fig. 18, the test data of the GNP image type sonic nozzle gas meter error checking device produced by the measuring and calculating company of the hippocampus, hangzhou, is the measurement accuracy which is high, and under the condition of different gas flow rates, the error between the measured value reflected by the technical scheme of the invention and the standard meter is small.
As shown in fig. 3, the flow channel further comprises a first vortex sheet 5 arranged at the end port of the first installation position 2 and a second vortex sheet 6 arranged at the end port of the second installation position 3, wherein the first vortex sheet 5 and the second vortex sheet 6 are arc-shaped thin sheets, the inner wall surface of the first vortex sheet 5 and the inner wall surface of the flow channel body 1 are on the same curved surface, and the inner wall surface of the second vortex sheet 6 and the inner wall surface of the flow channel body 1 are on the same curved surface. The first vortex piece 5 covers the end port of the first installation position 2 partially and is arranged close to the first outlet 12 end of the runner body 1, namely vortex generation is effectively reduced under the condition of not interfering the signal receiving and sending of the transducer, the second vortex piece 6 covers the end port of the second installation position 3 partially and is arranged close to the first outlet 12 end of the runner body 1, and vortex generation is effectively reduced under the condition of not interfering the signal receiving and sending of the transducer.
As shown in fig. 4, a plurality of rectifying plates 7 are arranged in parallel in the measuring section of the flow channel body 1, and a plurality of rectifying plates 7 divide the measuring section in the flow channel body 1 into a plurality of chambers which are mutually independent, wherein the transducers in the first mounting position 2 and the second mounting position 3 are all spread and reflected in one chamber, that is, the rectifying plates 7 avoid ultrasonic setting, and the plurality of rectifying plates 7 enable the fuel gas to form a laminar flow state in the measuring section, so that disturbance of other factors to-be-measured air flow can be reduced, and the measuring precision is improved.
In this embodiment, the rectifying piece 7 is parallel to the plane formed by the ultrasonic wave propagation and reflection, and the rectifying piece 7 axially extends to 5-8 mm beyond the end port of the first installation position 2 or the end port of the second installation position 3, so that the fuel gas can be rectified before entering the measuring section, which is beneficial to improving the stability of the fuel gas flow in the measuring section.
Example 2:
Embodiment 2 differs from embodiment 1 in that the reflection plate 4 is parallel to the gas flow direction, and the reflection plate 4 is extended forward and backward to form part of the side wall of the measuring section of the flow path body 1, and further, the reflection plate is extended forward and backward to form part of the side wall of the first and second expanded pipes 13 and 14, as shown in fig. 6. In addition, embodiment 2 is also different from embodiment 1 in that, as shown in fig. 7, the second diameter-enlarged pipe 14 includes a second diameter-enlarged pipe section, which is approximately a straight pipe.
Example 3:
Embodiment 3 differs from embodiment 1 in that, as shown in fig. 8, a third vortex sheet and a fourth vortex sheet are further included, wherein the third vortex sheet is disposed opposite to the first vortex sheet 5 and partially covers the end opening of the first installation site 2 and is disposed close to the first inlet 11, so that the vortex generation is effectively reduced; the fourth vortex sheet is arranged opposite to the second vortex sheet 6 and partially covers the end opening of the second installation site 3 and is arranged close to the first inlet 11 so as to guide the gas and effectively reduce the generation of vortex therein. In addition, the first vortex sheet 5, the second vortex sheet 6, the third vortex sheet and the fourth vortex sheet are far away from the top surface of the axis of the flow channel body 1, and the top surface has a downward inclined angle from the outer circumference of the installation position to the inner circumference of the installation position, so that the vortex generation at the corresponding positions can be further reduced; the first vortex sheet 5, the second vortex sheet 6, the third vortex sheet and the fourth vortex sheet can be formed by extending from the wall surface of the runner body 1 and extending into the first installation position and the second installation position.
Example 4:
Embodiment 4 differs from embodiment 3 in that the opposite end surfaces of the first vortex sheet 5 and the third vortex sheet are two cambered surfaces, the cambered openings of the two cambered surfaces face the axis of the first installation position 2, the opposite end surfaces of the second vortex sheet 2 and the fourth vortex sheet are two cambered surfaces, and the cambered openings of the two cambered surfaces face the axis of the second installation position 3.
The present invention has been described above by way of example, but the present invention is not limited to the above-described embodiments, and any modifications or variations based on the present invention fall within the scope of the present invention.
Claims (13)
1. The novel ultrasonic gas flowmeter unit is characterized by comprising a runner body (1), wherein the runner body (1) comprises a first inlet (11) and a first outlet (12) which can be communicated with a gas outlet (82) on a gas meter, when the first outlet (12) is communicated with the gas outlet (82), the runner body (1) is obliquely arranged so that gas enters the runner body (1) through the first inlet (11) at an obtuse angle and is discharged from the gas outlet (82), a first mounting position (2) and a second mounting position (3) for mounting a transducer are arranged on the same side wall of the runner body (1), and a reflecting plate (4) is arranged on the side wall of the runner body (1) opposite to the first mounting position (2) and the second mounting position (3);
the reflecting plate (4) is obliquely arranged and has an angle of outward inclination along the gas flow direction, and the reflecting plate (4) extends forwards and backwards and forms part of the side wall of the measuring section of the flow channel body (1).
2. The novel ultrasonic gas flowmeter unit according to claim 1, characterized in that the first inlet (11) end of the flow channel body (1) is coaxially provided with a first expanding tube (13), the first outlet (12) end of the flow channel body (1) is provided with a second expanding tube (14), and the first outlet (12) is communicated with the gas outlet (82) through the second expanding tube (14).
3. The novel ultrasonic gas flow meter unit according to claim 2, wherein the first diameter-enlarging pipe (13) comprises a first reducing pipe section and a first diameter-defining pipe section which are arranged in sequence in the air intake direction.
4. A novel ultrasonic gas flow meter unit according to claim 3, characterized in that the second diameter-enlarging pipe (14) comprises a second sizing pipe section and a second reducing pipe section arranged in sequence in the inlet direction, or the second diameter-enlarging pipe (14) comprises a second sizing pipe section; and the joint of the second expanding pipe (14) and the runner body (1) is in smooth transition.
5. The novel ultrasonic gas flow meter unit according to claim 1, further comprising a first vortex sheet (5) disposed at the end port of the first mounting location (2) and a second vortex sheet (6) disposed at the end port of the second mounting location (3), wherein the first vortex sheet (5) and the second vortex sheet (6) are arc-shaped sheets, the first vortex sheet (5) partially covers the end port of the first mounting location (2) and is disposed near the first outlet (12) end of the flow channel body (1), and the second vortex sheet (6) partially covers the end port of the second mounting location (3) and is disposed near the first outlet (12) end of the flow channel body (1).
6. The novel ultrasonic gas flow meter unit of claim 5, further comprising a third vortex sheet disposed opposite the first vortex sheet (5) and partially covering the first mounting location (2) end port, and disposed proximate the first inlet (11), and a fourth vortex sheet disposed opposite the second vortex sheet (6) and partially covering the second mounting location (3) end port, and disposed proximate the first inlet (11).
7. The novel ultrasonic gas flowmeter unit according to claim 6, characterized in that opposite end surfaces of said first vortex sheet (5) and said third vortex sheet are two cambered surfaces, and the cambered openings of the two cambered surfaces face the axis of the first mounting position (2); two opposite end surfaces of the second vortex sheet (6) and the fourth vortex sheet are two cambered surfaces, and the arc openings of the two cambered surfaces face the axis of the second installation position (3).
8. The novel ultrasonic gas flow meter unit according to claim 5, wherein the inner wall surface of the first vortex sheet (5) is on the same curved surface as the inner wall surface of the flow channel body (1), and the inner wall surface of the second vortex sheet (6) is on the same curved surface as the inner wall surface of the flow channel body (1).
9. The novel ultrasonic gas flowmeter unit according to claim 1, wherein a plurality of rectifying sheets (7) are arranged in parallel in the measuring section of the flow channel body (1), and the measuring section in the flow channel body (1) is divided into a plurality of chambers independent of each other by the plurality of rectifying sheets (7).
10. The novel ultrasonic gas flow meter unit according to claim 9, wherein the rectifying sheet (7) axially extends to 5-8 mm beyond the end ports of the first mounting position (2) and the second mounting position (3).
11. The novel ultrasonic gas flow meter unit according to any one of claims 1 to 10, wherein the angle of outward inclination of the reflecting plate (4) in the gas flow direction is 5 to 10 °, and the angle of incidence of the transducer in the first mounting location (2) provided close to the first inlet (11) is 40 to 60 °.
12. The utility model provides a gas table, its characterized in that includes casing (8), pneumatic valve (9) and according to any one of claims 1~10 ultrasonic wave gas flowmeter unit, casing (8) top surface is equipped with gas entry (81) and gas outlet (82), pneumatic valve (9) are located in casing (8) and can communicate with gas entry (81), the export of pneumatic valve (9) avoids first entry (11) setting, first export (12) and gas outlet (82) intercommunication and runner body (1) slope set up in casing (8) to make the gas be the obtuse angle and get into in runner body (1) and follow gas outlet (82) and discharge through first entry (11).
13. The gas meter of claim 12, wherein the axis of the ultrasonic gas flow meter unit forms an obtuse angle with the gas outlet (82) of 120-150 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202211138012.1A CN115655394B (en) | 2022-09-19 | 2022-09-19 | Novel ultrasonic gas flowmeter unit and gas meter using same |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211138012.1A CN115655394B (en) | 2022-09-19 | 2022-09-19 | Novel ultrasonic gas flowmeter unit and gas meter using same |
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| CN115655394A CN115655394A (en) | 2023-01-31 |
| CN115655394B true CN115655394B (en) | 2024-06-21 |
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| CN217424458U (en) * | 2022-04-25 | 2022-09-13 | 深圳友讯达科技股份有限公司 | Gas meter |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN217424458U (en) * | 2022-04-25 | 2022-09-13 | 深圳友讯达科技股份有限公司 | Gas meter |
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