CN218822555U - Correlation formula gas flow measuring instrument runner subassembly and flow measuring instrument - Google Patents
Correlation formula gas flow measuring instrument runner subassembly and flow measuring instrument Download PDFInfo
- Publication number
- CN218822555U CN218822555U CN202222871325.XU CN202222871325U CN218822555U CN 218822555 U CN218822555 U CN 218822555U CN 202222871325 U CN202222871325 U CN 202222871325U CN 218822555 U CN218822555 U CN 218822555U
- Authority
- CN
- China
- Prior art keywords
- gas
- flow channel
- cavity
- flow
- correlation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Measuring Volume Flow (AREA)
Abstract
The utility model discloses a correlation formula gas flow measurement instrument runner subassembly and flow measurement instrument, this runner subassembly includes: the gas meter comprises a cavity partition plate arranged in a gas meter shell, and a tubular runner body penetrating through the cavity partition plate, wherein an annular rectifying structure is axially arranged in an inner cavity of the runner body in an extending manner; the annular rectifying structure comprises a plurality of annular separating pipes which are concentrically arranged, and a left air inlet end and a right air outlet end of the flow channel body respectively form an air inlet guide plate and an air outlet guide plate outwards; the cavity division board is provided with the fixed bolster that extends to the guide plate of giving vent to anger and the guide plate outside of admitting air respectively, is provided with ultrasonic transducer installation department on two fixed bolsters respectively, and two ultrasonic transducer installation departments set up relatively, make the ultrasonic transducer who installs respectively at two installation departments be the correlation formula and distribute. The flow channel assembly improves the stability of a flow field, prolongs the flight time difference of the upstream and downstream in the flow channel, and improves the measurement precision and the anti-interference capability of the gas meter.
Description
Technical Field
The utility model relates to an ultrasonic wave gas flow measuring instrument technical field especially relates to a correlation formula gas flow measuring instrument runner subassembly and ultrasonic wave gas flow measuring instrument.
Background
From the birth of the flow meters, the flow meters for different purposes developed according to different principles of mechanics, heat, acoustics, electricity, optics, atomic physics and the like are various, such as mechanical flow meters, electromagnetic flow meters, ultrasonic flow meters and the like.
The ultrasonic flowmeter utilizes the principle that when ultrasonic waves are transmitted in flowing liquid, the ultrasonic waves carry information of fluid flow, the flow speed information of the measured fluid can be obtained by detecting ultrasonic signals passing through the fluid, and finally the flow speed information is converted into the flow required by measurement according to the corresponding principle. The specific measuring method is that two paired ultrasonic transducers with different positive and negative polarities are installed on the upstream and downstream of the measured pipeline. The upstream transducer emits a string of ultrasonic pulses, the ultrasonic pulses are transmitted to the downstream transducer through flowing fluid, after the downstream transducer receives ultrasonic signals, the related information of the ultrasonic pulses is recorded, and similarly, the related information of the ultrasonic pulses emitted by the downstream transducer received by the upstream transducer can be recorded. The recorded relevant information of the ultrasonic pulse can be converted into the flow to be measured by combining the corresponding principle. The ultrasonic flowmeter is divided according to a flow measurement principle, and mainly adopts several working principles of a time difference method, a frequency difference method and a Doppler method.
At present, the ultrasonic flowmeter is widely applied to gas flow measurement as a gas meter, and the ultrasonic gas meter has the outstanding advantages of wide measuring range, small pressure loss, no movable part, high measuring precision and the like, so that the ultrasonic flowmeter is a novel meter with future development potential.
However, at present, the domestic ultrasonic gas meter technology mainly depends on the foreign technology, and in the foreign ultrasonic gas meter scheme, in order to increase the sound path, the measurement path of the ultrasonic wave is mainly of a refraction type, such as a V shape, a W shape and the like, as shown in fig. 9, the structure is characterized in that a pair of ultrasonic transducers are installed on the side wall of the same side of the flow channel pipe body, but is limited by the influence of a transmission mode, the effective sound path of sound wave transmission of the structure is only parallel to the central distance between the two transducers in the gas flow direction, the attenuation of the sound wave can be increased through multiple reflections, the small flow measurement flight time difference is small, the reference error brought by zero drift is large, the measurement precision is low, and the anti-interference capability is weak. Alternatively, as shown in fig. 10, a pair of ultrasonic transducers are mounted on the opposite side walls of the flow channel tube body, respectively, using a Z-type, but this has the problem that the acoustic path is short and the measurement accuracy is not high.
Therefore, the existing ultrasonic gas flow meter has yet to be developed.
SUMMERY OF THE UTILITY MODEL
To the technical problem, the utility model provides a novel correlation formula gas flow measuring instrument's runner subassembly and the ultrasonic wave gas flow measuring instrument who adopts this subassembly, this correlation formula gas flow measuring instrument runner subassembly is with the setting that ultrasonic transducer corresponds at the both ends of runner body to adopt the annular rectification structure of concentric setting, not only improved flow field stability, and improved the flight time difference of the upper and lower low reaches in the runner, still improved the interference killing feature when having improved the measurement accuracy of gas table.
In order to solve the above problems, the utility model provides a following technical scheme:
in a first aspect, the utility model provides a correlation formula gas flow measuring instrument runner subassembly, it includes: the gas meter comprises a cavity separation plate arranged in a gas meter shell, a tubular runner body penetrating through the cavity separation plate, and an annular rectifying structure axially extending along the inner cavity of the runner body; the annular rectifying structure comprises a plurality of annular separating pipes which are concentrically arranged, the annular separating pipes are connected with adjacent annular separating pipes through connecting ribs, and the outermost annular separating pipe is connected with the inner wall of the flow channel body through the connecting ribs;
the left air inlet end and the right air outlet end of the flow channel body respectively form an air inlet guide plate and an air outlet guide plate which are curved surfaces, the inner diameters of the air inlet guide plate and the air outlet guide plate are gradually enlarged; the cavity division board is provided with the fixed bolster that extends to the guide plate of giving vent to anger and the guide plate outside of admitting air respectively, is provided with ultrasonic transducer installation department on two fixed bolsters respectively, and two ultrasonic transducer installation departments set up relatively, make the ultrasonic transducer who installs respectively at two installation departments be the correlation formula and distribute.
Preferably, in the flow channel assembly of the correlation gas flow meter, a mounting hole coaxial with the flow channel body is formed in the mounting portion of the ultrasonic transducer, and the mounting hole is matched with the ultrasonic transducer in shape.
Preferably, in the flow channel assembly of the correlation gas flow meter, the number of the annular separation tubes is two, and the annular rectifying structure is an inner-layer structure and an outer-layer structure.
Preferably, in the flow passage assembly of the ultrasonic gas flow measuring instrument, the radiuses of two annular separating pipes from inside to outside are respectively 1/8D and 5/16D in sequence, and the thickness of the annular separating pipe is 1/16D. D is the inner diameter of the flow passage body.
Preferably, in the flow channel assembly of the correlation gas flow measuring instrument, the distance X between the front end face of the ultrasonic transducer installation part and the root part of the gas outlet guide plate is 3/8D, and D is the inner diameter of the flow channel body.
Preferably, in the flow channel assembly of the correlation gas flow meter, the connecting rib is arranged at two end positions or a middle position of the annular rectifying structure, or the connecting rib is arranged to extend from one end of the annular rectifying structure to the other end.
Preferably, in the correlation gas flow measuring instrument flow channel assembly, the flow channel body and the cavity partition plate are integrally molded, or the flow channel body and the cavity partition plate are fixedly connected in an ultrasonic welding, clamping, screwing or bonding mode; the annular rectifying structure and the flow channel body are arranged in an integrated mode, or the annular rectifying structure and the flow channel body are connected in an ultrasonic welding, bonding, clamping or screwing mode.
Preferably, the correlation type gas flow measuring instrument flow channel assembly further comprises two ultrasonic transducers respectively mounted on the two ultrasonic transducer mounting portions, the two ultrasonic transducers are distributed in a correlation manner, and the sound wave transmission direction is parallel to the gas movement direction.
In a second aspect, the present invention also provides an ultrasonic gas flow meter, which includes: the ultrasonic gas flow measuring instrument assembly comprises a gas meter shell, a gas inlet valve arranged at a gas inlet of the gas meter shell, and the ultrasonic gas flow measuring instrument assembly horizontally arranged in the gas meter shell, wherein a cavity in the gas meter shell is divided into a gas inlet cavity and a gas outlet cavity which are distributed leftwards and rightwards by a cavity division plate, and the volume of the gas inlet cavity is larger than that of the gas outlet cavity.
The utility model provides a correlation formula gas flow measuring instrument runner subassembly and ultrasonic wave gas flow measuring instrument have following beneficial effect:
1. the flow channel assembly of the correlation type gas flow measuring instrument is simple in structure and ingenious in design, and on one hand, the stability of a flow field of a measuring section is improved while the turbulence intensity is greatly reduced through the arrangement of the annular rectifying structure in the flow channel body. On the other hand, the distribution of the opposite jet flow channels improves the flight time difference of the upstream and the downstream, greatly improves the sound path of sound waves in the transmission process, and improves the flow test precision and the anti-interference capability.
2. Compared with the conventional mainstream refraction type flow channel module of the gas meter, the flow channel module has the advantages that the calculated flight time difference is increased by more than 3-4 times due to the structural advantages, and the accuracy is improved when the flow is measured.
Drawings
Fig. 1 is a schematic perspective view of an ultrasonic gas flow meter according to embodiment 1 of the present invention; the section of the shell in the figure is processed;
fig. 2 is a schematic perspective view of a flow passage assembly of the correlation gas flow rate measurement instrument of embodiment 1;
fig. 3 is a schematic top view of a flow passage assembly of the correlation gas flow rate measurement instrument of embodiment 1;
fig. 4 is a left side view schematically showing the structure of a flow passage assembly of the correlation gas flow rate measuring instrument of embodiment 1;
FIG. 5 isbase:Sub>A sectional view A-A of FIG. 3;
FIG. 6 isbase:Sub>A schematic perspective view of the section A-A of FIG. 3;
FIG. 7 is a sectional view taken along line B-B of FIG. 3;
FIG. 8 is a cross-sectional view C-C of FIG. 3;
FIGS. 9 and 10 are schematic structural views of a measurement path of a conventional ultrasonic gas flow meter, respectively;
FIG. 11 is a schematic view of a prior art ultrasonic gas flow meter;
fig. 12 is an enlarged view of a partial structure of a flow passage assembly of the ultrasonic gas flow meter according to embodiment 1;
FIG. 13 is a result of a reading error test of the ultrasonic gas flow meter of the present application; tables 3-1 and 3-2 are the results of the value error tests of the ultrasonic gas flow meter of example 2.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts belong to the protection scope of the present invention. It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may be present. The words used in this specification to indicate orientation or positional relationship are based on the orientation or positional relationship shown in the drawings and are used only for the convenience of describing the invention and to simplify the description, rather than to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation and, therefore, should not be taken as limiting the invention.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items. Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.
Example 1
The utility model provides a correlation formula gas flow measuring instrument's runner subassembly, as shown in fig. 2-8, this runner subassembly includes: the gas meter comprises a cavity separating plate 1 longitudinally arranged in a gas meter shell, a circular tube-shaped flow channel body 2 penetrating through the cavity separating plate, and an annular rectifying structure 3 axially extending in an inner cavity of the flow channel body.
The cavity division plate longitudinally arranged is used for being installed in the gas meter shell and dividing the inner cavity of the gas meter into two cavities, and the inner cavity of the gas meter shell is divided into an air inlet cavity and an air outlet cavity which are distributed in the left and right directions by the cavity division plate 1.
The runner body and the cavity partition plate can be integrated or fixedly connected through ultrasonic welding, clamping, screwing and other modes.
The annular rectifying structure 3 and the flow channel body 2 can be integrated or connected by ultrasonic welding, bonding, clamping, screwing and other modes.
Preferably, the runner assembly is made of an existing plastic material for cost reduction and product lightening. In other embodiments, the flow channel assembly may be made of metal.
The left air inlet end and the right air outlet end of the flow channel body respectively form an air inlet guide plate 52 and an air outlet guide plate 51 which are curved surfaces and have gradually enlarged inner diameters outwards. The inlet guide plate 52 and the outlet guide plate 51 are trumpet-shaped, and play a better role in guiding flow. The air outlet guide plate 51 and the transducer installation part form an annular guide gap, air flows out of the transducer along the annular guide gap and enters the air outlet cavity, turbulent flow of the air at the position is restrained based on the combined action of the air outlet guide plate and the transducer, and the turbulence degree of the air at the air outlet is reduced.
The air inlet guide plate and the air outlet guide plate 51 can be connected with the runner body in the following modes respectively: the two are integrally arranged, or the two are connected by bonding, ultrasonic welding, splicing and the like.
The mainstream structure of the rectification structure of the current ultrasonic gas flow meter is to install a plurality of rectangular rectification plates arranged in parallel in a flow passage with a rectangular cross section, as shown in fig. 11, in the ultrasonic fluid metering device disclosed in the patent publication No. CN103210287B, all ultrasonic transducers are arranged on a top plate, and a plurality of partition plates are arranged in parallel and inserted from an upper opening part. The rectifying structure is suitable for ultrasonic gas flow measuring instruments with rectangular flow channels and adopting a refraction type propagation mode, and is limited by the influence of a transmission mode, the effective sound path of sound wave transmission in the structure is only the center distance of two transducers parallel to the gas flow direction, the sound path is limited, the attenuation of the sound wave can be increased through multiple reflections, and great difficulty can be brought to signal detection.
Based on above-mentioned prior art's problem, for the effective acoustic distance of prolonging sound transmission by a wide margin, reduce the decay of sound wave, improve signal detection's precision to guarantee simultaneously to improve the rectification effect to entering into this internal gas of runner, this embodiment uses annular rectification structure innovatively, specifically carries out following improvement:
as shown in fig. 6 to 8, the annular rectifying structure 3 includes a plurality of annular separating pipes 31 arranged coaxially (i.e., concentrically), the annular separating pipes are connected to adjacent annular separating pipes by connecting ribs 32, and the outermost annular separating pipe is connected to the inner wall of the flow channel body by connecting ribs.
The annular separating pipes are basically distributed in the whole flow passage body, the number of the annular separating pipes is at least two, and the number and the specification of the annular separating pipes can be correspondingly adjusted according to the inner diameter of the flow passage body and specific requirements. The structure breaks through the conventional flow channel structure, reduces the Reynolds number (Re) of a gas flow field in the flow process by adopting the plurality of separation tubes which are coaxially arranged, reduces the turbulence degree in the flow process of the flow field, and provides a more stable speed field for flow test.
In this embodiment, the number of the annular separating tubes 31 is 2, and the annular rectifying structure is an inner-layer structure and an outer-layer structure; the thickness of the annular separating pipe is 1/16D, the radiuses of the two annular separating pipes from inside to outside are 1/8D and 5/16D respectively, and D is the inner diameter of the flow passage body.
Preferably, as shown in fig. 12, a distance X between the front end face of the ultrasonic transducer mounting part and the root of the outlet guide plate is 3/8d, and d is the inner diameter of the flow channel body.
In order to solve the installation problem of the ultrasonic transducers in the opposite-emitting type gas meter flow channel body, the cavity division plate 1 is respectively provided with a fixed support 6 extending to the outer sides of the air outlet guide plate and the air inlet guide plate, the two fixed supports are respectively provided with an ultrasonic transducer installation part 61, the two ultrasonic transducer installation parts are arranged oppositely, the ultrasonic transducers respectively installed on the two installation parts are in opposite-emitting distribution, and the sound wave transmission direction is parallel to the gas movement direction.
The fixed bolster directly can set up to integrated into one piece with the cavity division board, perhaps, the fixed bolster carries out fixed connection through modes such as spiro union, joint, bonding, ultrasonic bonding with the cavity division board.
The working principle of the flow channel assembly of the correlation type gas flow measuring instrument is as follows:
as shown in fig. 1 and 7, after the gas enters the left gas inlet cavity through the gas inlet valve, the gas is buffered in the gas inlet cavity, the disturbance degree of the gas flowing through the valve is reduced, the buffered gas enters the runner body (namely the testing section) under the flow guide and aggregation action of the gas inlet cavity and the gas inlet guide plate, the tested gas flows out from the outlet formed by the surrounding of the gas outlet guide plate, the downstream transducer and the fixed support are avoided, and after the gas outlet cavity is buffered, the gas finally flows through the gas outlet and is discharged.
And the ultrasonic waves load the speed information of the gas flowing in the pipeline in the measuring process, so that the upstream and downstream flight time generates a difference value, the flow velocity of the gas in the pipeline section is obtained through the calculation of the time difference, and then the flow value is obtained.
The runner assembly of this embodiment adopts correlation type setting, sets up the position of ultrasonic wave respectively at the both ends of runner body, has not only greatly improved the acoustic path of sound wave in transmission process, moreover, because the direction of flow of gas is unanimous with the propagation direction of ultrasonic wave, gaseous speed is whole to be loaded on the acoustic velocity, and the flight time difference that the advantage of this kind of setting made the calculation obtain improves more than 3 ~ 4 times, has improved the precision when measuring flow.
In this embodiment, specifically, the connecting ribs include an inner connecting rib and an outer connecting rib. As shown in fig. 8, inner connecting ribs 321 extend from the annular partition pipes to be connected, and outer connecting ribs 322 extend from the outermost annular partition plates toward the inner wall of the flow channel body to be connected to the flow channel body.
The utility model discloses in, the splice bar can set up in the any position of annular rectifier structure, plays the effect of fixing the annular rectifier at runner body inner chamber.
In order to reduce the influence of the connecting ribs on the airflow in the inner cavity of the flow channel body as much as possible and ensure the connection stability of the annular rectifying structure, the connecting ribs are arranged at the two ends of the annular rectifying structure; in other embodiments, the connecting rib is arranged in the middle of the annular rectifying structure; alternatively, as shown in fig. 7 in the present embodiment, the connecting rib may be provided to extend from the vicinity of one end of the ring-shaped rectifying structure to the vicinity of the other end, thereby improving the stability of the internal structure.
In this embodiment, as shown in fig. 5 and 6, the ultrasonic transducer mounting portion 61 is provided with a mounting hole coaxially provided with the flow path body, and the mounting hole is adapted to the shape of the ultrasonic transducer. The ultrasonic transducer is connected with the corresponding mounting hole in one or more modes of clamping, screw connection, bonding, physical welding and the like.
The runner assembly of the correlation type gas flow measuring instrument is simple in structure and ingenious in design, and on one hand, the stability of a flow field of a measuring section is improved while the turbulence intensity is greatly reduced through the arrangement of the annular rectifying structure in the runner body. On the other hand, the distribution of the correlation flow channels improves the flight time difference of the upstream and downstream, improves the flow testing precision and increases the anti-interference capability.
In the embodiment 1, in the flow channel assembly of the correlation gas flow meter, the ultrasonic transducers 7 are respectively mounted on the two ultrasonic transducer mounting portions 61, the two ultrasonic transducers are distributed in a correlation manner, and the transmission direction of the sound wave is parallel to the movement direction of the gas.
The ultrasonic gas flow meter assembly can be assembled by assembling two ultrasonic transducers 7 respectively to the flow channel assembly of the correlation gas flow meter described above.
Example 2
The utility model also provides an ultrasonic wave gas flow measuring instrument, as shown in FIG. 1, this ultrasonic wave gas flow measuring instrument includes: the ultrasonic gas flow measuring instrument assembly comprises a gas meter shell 8, a gas inlet valve 9 arranged at a gas inlet 83 of the gas meter shell, and the ultrasonic gas flow measuring instrument assembly horizontally arranged in the gas meter shell, wherein a cavity in the gas meter shell is divided into a gas inlet cavity 81 and a gas outlet cavity 82 which are distributed leftwards and rightwards by a cavity division plate 1, and the volume of the gas inlet cavity 81 is larger than that of the gas outlet cavity 82.
In this embodiment, the cavity divider is disposed adjacent to the air outlet 84.
In order to meet the normal use of the ultrasonic gas flow measuring instrument, the gas meter is also provided with core components such as a measuring circuit part, an arithmetic circuit part and the like. A measurement circuit unit for measuring an ultrasonic propagation time between the plurality of ultrasonic transceivers; and an arithmetic circuit unit that obtains the flow rate of the fluid to be measured based on a signal from the measuring circuit unit. The two components may also be integrated onto a circuit board. In the drawings, these structures are omitted.
Test examples
1. The adopted checking device comprises:
this example performs error detection on the ultrasonic gas flow meter of example 2 by the following standard apparatus: GNP type image type sound velocity nozzle method gas meter error checking device;
the manufacturer: hangzhou Tianma measurement science and technology company Limited delivery number: 202072
Environmental conditions: humidity 37% RH atmospheric pressure 101kPa temperature 21.3 DEG C
2. Test method and implementation principle
Connecting the ultrasonic gas flow meter to be tested with 7 (Q) standard devices in the testing device in series max 、0.7Q max 、0.4Q max 、0.2Q max 、0.1Q max 、3Q min 、Q min ) And measuring flow points with different sizes, and calculating the indicating value error of the ultrasonic gas flow measuring instrument and the standard device at each flow point.
The values in the table of fig. 13 represent the error in% of the readings at that flow point from the standard, respectively. For example, a designation of 0.32 in FIG. 13 is that the flow point is given by a reading of Table 3-1 that has a 0.32% error from the etalon reading, for the same reason.
3. Test results and analysis
According to the requirements of GB/T39841-2021 ultrasonic gas meter, the indication error of the gas meter with the accuracy grade of 1.5 grade is within +/-1.5 percent, and the gas meter is qualified after reaching the standard.
As can be seen from fig. 13, the indicating errors of the ultrasonic gas flow meter of example 2 are all below 0.32%, and the lowest value is as low as 0.08%, and the indicating errors are very small, and the accuracy is much higher than the above-mentioned national standard requirements, which indicates that the arrangement of the flow channel assembly of the correlation gas flow meter of the present application significantly improves the detection accuracy of the ultrasonic gas flow meter.
The above-described embodiments of the apparatus are merely illustrative, and some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. It should be understood that equivalent alterations and modifications can be made by those skilled in the art according to the technical solution of the present invention and the inventive concept, and all such alterations and modifications shall fall within the scope of the appended claims.
Claims (10)
1. A correlation gas flow meter flow channel assembly, comprising: the gas meter comprises a cavity partition plate (1) arranged in a gas meter shell, a tubular runner body (2) penetrating through the cavity partition plate, and an annular rectifying structure (3) axially extending along the inner cavity of the runner body; the annular rectifying structure comprises a plurality of annular separating pipes (31) which are concentrically arranged, the annular separating pipes are connected with adjacent annular separating pipes through connecting ribs (32), and the outermost annular separating pipe is connected with the inner wall of the flow channel body through the connecting ribs;
the left air inlet end and the right air outlet end of the flow channel body respectively form an air inlet guide plate (52) and an air outlet guide plate (51) which are curved surfaces and have gradually enlarged inner diameters outwards; the cavity division plate (1) is respectively provided with a fixed support (6) extending towards the outer sides of the air outlet guide plate and the air inlet guide plate, the two fixed supports are respectively provided with an ultrasonic transducer installation part (61), and the two ultrasonic transducer installation parts are oppositely arranged, so that the ultrasonic transducers respectively installed on the two installation parts are distributed in a correlation mode.
2. The flow channel assembly of a correlation gas flow meter according to claim 1, wherein the ultrasonic transducer mounting portion (61) is provided with a mounting hole (62) coaxially provided with the flow channel body, and the mounting hole is adapted to the shape of the ultrasonic transducer.
3. A correlation gas flow meter flow channel assembly according to claim 1, characterized in that said annular divider tube (31) is 2 in number and the annular rectifying structure is an inner and outer two-layer structure.
4. The correlation gas flow measuring instrument flow channel assembly of claim 3, wherein the radii of the two annular separating tubes from inside to outside are 1/8D and 5/16D respectively, and D is the inner diameter of the flow channel body.
5. The flow channel assembly of the correlation gas flow measuring instrument according to claim 4, wherein the distance between the front end face of the ultrasonic transducer mounting portion and the root portion of the outlet guide plate is 3/8D, and D is the inner diameter of the flow channel body.
6. A correlation gas flow meter flow channel assembly according to claim 1, wherein the connecting ribs are provided at both end positions or at a middle position of the ring-shaped rectifying structure, or the connecting ribs are provided to extend from one end to the other end of the ring-shaped rectifying structure.
7. The flow channel assembly of a correlation gas flow meter of claim 1, wherein the flow channel body and the cavity partition plate are integrally formed, or the flow channel body and the cavity partition plate are fixedly connected by ultrasonic welding, clamping, screwing or bonding.
8. The flow channel assembly of a correlation gas flow meter of claim 1, wherein the ring-shaped rectifying structure and the flow channel body are integrally disposed or are connected by ultrasonic welding, bonding, clamping or screwing.
9. The flow channel assembly of a correlation gas flow meter according to any of claims 1 to 8, further comprising two ultrasonic transducers (7) respectively mounted on the two ultrasonic transducer mounting portions (61), wherein the two ultrasonic transducers are distributed in a correlation manner, and the transmission direction of sound waves is parallel to the movement direction of gas; the runner assembly is made of plastic.
10. An ultrasonic gas flow meter, comprising: the flow passage component of the correlation type gas flow measuring instrument comprises a gas meter shell (8), a gas inlet valve (9) arranged at a gas inlet (83) of the gas meter shell, and the flow passage component of the correlation type gas flow measuring instrument according to claim 9 horizontally arranged in the gas meter shell, wherein a cavity in the gas meter shell is divided into a gas inlet cavity (81) and a gas outlet cavity (82) which are distributed left and right by a cavity dividing plate (1), and the volume of the gas inlet cavity (81) is larger than that of the gas outlet cavity (82).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222871325.XU CN218822555U (en) | 2022-10-28 | 2022-10-28 | Correlation formula gas flow measuring instrument runner subassembly and flow measuring instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222871325.XU CN218822555U (en) | 2022-10-28 | 2022-10-28 | Correlation formula gas flow measuring instrument runner subassembly and flow measuring instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218822555U true CN218822555U (en) | 2023-04-07 |
Family
ID=87275961
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222871325.XU Active CN218822555U (en) | 2022-10-28 | 2022-10-28 | Correlation formula gas flow measuring instrument runner subassembly and flow measuring instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218822555U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115900852A (en) * | 2022-10-28 | 2023-04-04 | 青岛乾程科技股份有限公司 | Gas meter runner assembly and ultrasonic gas meter provided with same |
-
2022
- 2022-10-28 CN CN202222871325.XU patent/CN218822555U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115900852A (en) * | 2022-10-28 | 2023-04-04 | 青岛乾程科技股份有限公司 | Gas meter runner assembly and ultrasonic gas meter provided with same |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6851322B2 (en) | Method and apparatus for determining flow velocity in a channel | |
| CN203672423U (en) | Ultrasonic metering system with orifice plate flow meter device | |
| CN218822555U (en) | Correlation formula gas flow measuring instrument runner subassembly and flow measuring instrument | |
| CN212567542U (en) | Ultrasonic gas meter measuring device and ultrasonic gas meter | |
| CN218724397U (en) | Flow channel assembly of correlation type ultrasonic gas meter, gas meter assembly and ultrasonic gas meter | |
| CN203732108U (en) | Ultrasonic water meter pipeline structure with high stability and small initial motion | |
| CN202793483U (en) | Small-bore ultrasonic flowmeter flow tube | |
| CN208350150U (en) | A kind of ultrasonic flowmeter | |
| CN218411315U (en) | Ultrasonic gas meter flow channel assembly and ultrasonic gas meter | |
| CN103674146A (en) | Mass flow meter based on ultrasonic flow meter | |
| CN108871478A (en) | A kind of ultrasonic flowmeter | |
| CN214149456U (en) | Gas metering bin structure for ultrasonic gas meter | |
| CN111272240A (en) | Built-in oblique reflection multichannel ultrasonic flow measurement module and flowmeter | |
| CN216283723U (en) | Arc-shaped and broken-line sound path ultrasonic gas meter flow passage device | |
| CN115900852A (en) | Gas meter runner assembly and ultrasonic gas meter provided with same | |
| CN112747260B (en) | Ultrasonic flow measuring device capable of preventing noise interference | |
| CN114459550A (en) | Novel ultrasonic gas meter and using method | |
| CN211717528U (en) | Built-in oblique reflection multichannel ultrasonic flow measurement module and flowmeter | |
| CN107490406B (en) | Ultrasonic vortex street flowmeter | |
| CN113588020A (en) | Arc-shaped and broken-line sound path ultrasonic gas meter flow passage device | |
| CN111256768A (en) | Ultrasonic flowmeter | |
| CN218628464U (en) | Ultrasonic flowmeter | |
| CN219084154U (en) | Ultrasonic flowmeter | |
| CN213301351U (en) | Multi-channel ultrasonic gas flowmeter | |
| CN218673764U (en) | Ultrasonic gas flow metering device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |