CN210135957U - Ultrasonic gas meter and gas pipeline - Google Patents
Ultrasonic gas meter and gas pipeline Download PDFInfo
- Publication number
- CN210135957U CN210135957U CN201921389479.7U CN201921389479U CN210135957U CN 210135957 U CN210135957 U CN 210135957U CN 201921389479 U CN201921389479 U CN 201921389479U CN 210135957 U CN210135957 U CN 210135957U
- Authority
- CN
- China
- Prior art keywords
- ultrasonic
- ultrasonic transducer
- pipe
- gas
- downstream
- 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
Abstract
The utility model provides an ultrasonic gas meter and a gas pipeline, which relates to the technical field of gas flow measurement, and comprises a measuring pipe, an upstream ultrasonic transducer and a downstream ultrasonic transducer, wherein the measuring pipe is used for circulating gas to be measured, and the upstream ultrasonic transducer and the downstream ultrasonic transducer are arranged at the same side of the measuring pipe; two reflecting surfaces for reflecting ultrasonic waves are arranged in the measuring tube, so that the ultrasonic waves emitted by the upstream ultrasonic transducer are transmitted to the downstream ultrasonic transducer through a U-shaped path in the measuring tube. The ultrasonic wave is propagated with U type route in this ultrasonic gas table, and effective sound journey does not receive measuring pipe's cross section high influence, compares with prior art, can not increase the volume of ultrasonic gas table, is showing simultaneously to have increased the detection time difference between upstream ultrasonic transducer and the low reaches ultrasonic transducer, has improved the measurement accuracy of ultrasonic gas table.
Description
Technical Field
The utility model belongs to the technical field of gas flow measurement technique and specifically relates to an ultrasonic wave gas table and gas pipeline are related to.
Background
The ultrasonic gas meter measures the gas flow rate by adopting a time difference method principle, and reflects the flow rate of the fluid by measuring the difference of the forward flow and the backward flow propagation time speeds of ultrasonic signals in the fluid.
Referring to the structural schematic diagram of an ultrasonic gas meter shown in fig. 1, the ultrasonic gas meter includes an inlet 101 and an outlet 102, a measuring tube is connected between the inlet 101 and the outlet 102, and gas enters the measuring tube from the inlet 101 and flows out of the outlet 102 after flowing through the measuring tube; an upstream ultrasonic transducer 103 and a downstream ultrasonic transducer 104 are respectively arranged on two sides of the measuring pipe, and the gas flow rate is measured by measuring the time (forward flow propagation time) for the ultrasonic wave emitted by the upstream ultrasonic transducer 103 to reach the downstream ultrasonic transducer 104 and the time (reverse flow propagation time) for the ultrasonic wave emitted by the downstream ultrasonic transducer 104 to reach the upstream ultrasonic transducer 103.
In order to improve the measurement accuracy of the ultrasonic gas meter, a means of widening a gas flow passage and increasing a detection time difference between an upstream ultrasonic transducer and a downstream ultrasonic transducer is generally adopted at present to reduce the influence of errors on the measurement accuracy. However, this method may increase the volume of the ultrasonic gas meter, and it is inconvenient to install the ultrasonic gas meter when the volume is too large, and since the propagation speed of the ultrasonic wave is fast, the increase of the detection time difference caused by widening the gas flow passage is limited, and the improvement amount of the measurement accuracy is also limited.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an ultrasonic wave gas table and gas pipeline to improve the measurement accuracy of ultrasonic wave gas table.
The utility model provides an ultrasonic gas meter, which comprises a measuring pipe, an upstream ultrasonic transducer and a downstream ultrasonic transducer, wherein the measuring pipe is used for circulating gas to be measured, and the upstream ultrasonic transducer and the downstream ultrasonic transducer are arranged at the same side of the measuring pipe; two reflecting surfaces for reflecting ultrasonic waves are arranged in the measuring pipe, so that the ultrasonic waves emitted by the upstream ultrasonic transducer are transmitted to the downstream ultrasonic transducer through a U-shaped path in the measuring pipe.
Further, the ultrasonic gas meter comprises an inlet connecting pipe and an outlet connecting pipe, an upstream buffer container is arranged between the inlet connecting pipe and the measuring pipe, and a downstream buffer container is arranged between the measuring pipe and the outlet connecting pipe.
Further, the cross-sectional area of the downstream buffer container is larger than that of the outlet connection pipe, and the ratio of the cross-sectional area of the downstream buffer container to that of the outlet connection pipe is larger than a preset threshold value.
Further, the cross-sectional shape of the measuring tube is an axisymmetric figure.
Further, the inside of surveying buret is provided with a plurality of baffles, each the extending direction of baffle all with the extending direction of surveying buret is the same, and is a plurality of the baffle will the inside partition of surveying buret is a plurality of cavities on the cross section of surveying buret, it is a plurality of the cavity is axisymmetric setting.
Further, the number of the partition plates comprises two, and the cross-sectional area of the cavity in the central position is not smaller than that of the upstream ultrasonic transducer.
Further, the ultrasonic gas meter also comprises a cavity, and the cavity is used for accommodating the measuring pipe, the upstream ultrasonic transducer and the downstream ultrasonic transducer.
Further, the material of the cavity comprises metal or rigid foam plastic.
Further, the lead of the upstream ultrasonic transducer and the lead of the downstream ultrasonic transducer are both disposed within the cavity.
The utility model also provides a gas pipeline, including gas pipe and foretell ultrasonic wave gas table, ultrasonic wave gas table sets up on the gas pipe.
In the ultrasonic gas meter and the gas pipeline provided by the utility model, the ultrasonic gas meter comprises a measuring pipe, an upstream ultrasonic transducer and a downstream ultrasonic transducer, the measuring pipe is used for circulating the gas to be measured, and the upstream ultrasonic transducer and the downstream ultrasonic transducer are arranged at the same side of the measuring pipe; two reflecting surfaces for reflecting ultrasonic waves are arranged in the measuring tube, so that the ultrasonic waves emitted by the upstream ultrasonic transducer are transmitted to the downstream ultrasonic transducer through a U-shaped path in the measuring tube. The ultrasonic waves are transmitted in the ultrasonic gas meter in a U-shaped path, and the effective sound path (the part of the ultrasonic wave transmission speed on the ultrasonic wave transmission path influenced by the gas flow velocity) is equal to the center distance between the upstream ultrasonic transducer and the downstream ultrasonic transducer, so that the effective sound path is not influenced by the cross section height of the measuring tube.
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 embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an ultrasonic gas meter in the prior art;
fig. 2 is a schematic structural diagram of an ultrasonic gas meter provided in an embodiment of the present invention;
FIG. 3 is a cross-sectional view taken along the line A-A in FIG. 2;
FIG. 4 is another cross-sectional view taken along line A-A of FIG. 2;
FIG. 5 is another cross-sectional view taken along line A-A of FIG. 2;
fig. 6 is a schematic structural view of a gas pipeline provided by an embodiment of the present invention.
Icon: 101-an inlet; 102-an outlet; 103-an upstream ultrasonic transducer; 104-a downstream ultrasonic transducer; 201-measuring tube; 202-an upstream ultrasonic transducer; 203-downstream ultrasonic transducers; 204-an upstream reflective surface; 205-a downstream reflective surface; 206-inlet connection pipe; 207-outlet connection; 208-an upstream buffer vessel; 209-downstream buffer vessel; 210-a separator; 211-a chamber; 212. 213-lead wire; 20-ultrasonic gas meter; 30-gas pipe.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The measurement accuracy of present ultrasonic wave gas table still can't satisfy the demand, based on this, the embodiment of the utility model provides a pair of ultrasonic wave gas table and gas pipeline can improve the measurement accuracy of ultrasonic wave gas table.
For understanding this embodiment, it is at first right the utility model discloses an ultrasonic gas meter of the disclosed embodiment introduces in detail.
Referring to a schematic structural diagram of an ultrasonic gas meter shown in fig. 2, the ultrasonic gas meter includes a measuring pipe 201, an upstream ultrasonic transducer 202 and a downstream ultrasonic transducer 203, the measuring pipe 201 is used for flowing gas to be measured, and the upstream ultrasonic transducer 202 and the downstream ultrasonic transducer 203 are arranged on the same side of the measuring pipe 201; two reflecting surfaces (an upstream reflecting surface 204 and a downstream reflecting surface 205) for reflecting the ultrasonic waves are arranged in the measuring pipe 201, so that the ultrasonic waves emitted by the upstream ultrasonic transducer 202 are transmitted to the downstream ultrasonic transducer 203 through a U-shaped path in the measuring pipe 201.
Specifically, the upstream ultrasonic transducer 202 and the downstream ultrasonic transducer 203 periodically send/receive ultrasonic waves in turn to measure the flow velocity of the gas in the measuring pipe 201. Ultrasonic waves emitted by the upstream ultrasonic transducer 202 reach the downstream ultrasonic transducer 203 through the upstream reflecting surface 204 and the downstream reflecting surface 205 in sequence, and are received by the downstream ultrasonic transducer 203; similarly, the ultrasonic wave emitted by the downstream ultrasonic transducer 203 reaches the upstream ultrasonic transducer 202 through the downstream reflecting surface 205 and the upstream reflecting surface 204, and is received by the upstream ultrasonic transducer 202. The inclination angle α 1 of the upstream reflection surface 204 and the inclination angle α 2 of the downstream reflection surface 205 with respect to the horizontal plane may be 45 °.
The measurement principle of the ultrasonic gas meter is as follows:
let the gas flow velocity be v, the propagation velocity of the ultrasonic wave in the gas be c, the distance from the upstream ultrasonic transducer 202 to the upstream reflecting surface 204 and the distance from the downstream ultrasonic transducer 203 to the downstream reflecting surface 205 are d1The distance from the upstream reflecting surface 204 to the downstream reflecting surface 205 is d2Time t of ultrasonic wave propagation from upstream ultrasonic transducer 202 to downstream ultrasonic transducer 2031Comprises the following steps:
time t of ultrasonic wave propagation from downstream ultrasonic transducer 203 to upstream ultrasonic transducer 2022Comprises the following steps:
formula (2) -formula (1):
because v is2＜c2Neglecting v2Obtaining:
also, in the same manner as above,formula (1) + formula (2), ignoring v2Obtaining:
substituting the formula (4) for the human formula (3):
setting:
then, the following steps are obtained:
as can be seen from the expressions (6) and (7), at the time i, the propagation time from the upstream to the downstream of the ultrasonic wave is measured
And downstream to upstream propagation time
The gas flow velocity v can be calculated no matter what the gas components are, no matter what the temperature isiFurther, the instantaneous flow q is calculatedi：
qi＝vis (8)
Where s is the cross-sectional area of the measurement tube.
The integration results in an integrated flow QN between time i-0 and time i-N:
where Δ t is the calculation period.
The propagation path of the ultrasonic wave in the ultrasonic gas meter is a U-shaped path, and the U-shaped path comprises a part d perpendicular to the gas flowing direction1And a portion d parallel to the gas flow direction2. Propagation velocity of ultrasonic wave at d1Part of the whole course is not influenced by the gas flow speed, at d2Part of the whole course is influenced by the gas flow velocity, so the effective sound path of the U-shaped path is d2And the effective sound path d of the U-shaped path is fixed at a certain position of the ultrasonic transducer2And max.
In addition, in the U-shaped path, the ratio of the effective path of the ultrasonic wave propagation to the total length of the path of the ultrasonic wave propagation is the largest. The channel noise is in direct proportion to the length of the propagation channel, so that the ultrasonic propagation signal-to-noise ratio of the ultrasonic gas meter is the maximum. Therefore, under the condition of the same signal processing capability, the ultrasonic gas meter provided by the embodiment can enable the measurement accuracy to reach the best.
In addition, the effective acoustic path d2Cross-sectional height d of the untested burette 2013The influence is that the design of the cross-sectional area of the measuring tube 201 is made more flexible. d3Can take on values based on gas fluid properties, e.g. d3The value can be taken according to the requirements on the pressure loss and the flow error of the ultrasonic gas meter; d under the condition of meeting the pressure loss requirement of the ultrasonic gas meter3The design is smaller, the cross section area s of the measuring pipe 201 is reduced, the measuring precision and the stability can be improved, the pressure loss requirement on the ultrasonic gas meter is met, the flow error is minimized, and therefore the minimum flow Q of the ultrasonic gas meter can be achievedminTo a better level.
The mathematical model in this embodiment introduces no more than one-tenth of an additional error over the range of temperatures currently known for various gas compositions and normal use.
Alternatively, the upstream reflecting surface 204 and the downstream reflecting surface 205 may be both walls of the measurement pipe 201.
In the embodiment of the utility model, the ultrasonic gas meter comprises a measuring pipe, an upstream ultrasonic transducer and a downstream ultrasonic transducer, the measuring pipe is used for circulating the gas to be measured, and the upstream ultrasonic transducer and the downstream ultrasonic transducer are arranged at the same side of the measuring pipe; two reflecting surfaces for reflecting ultrasonic waves are arranged in the measuring tube, so that the ultrasonic waves emitted by the upstream ultrasonic transducer are transmitted to the downstream ultrasonic transducer through a U-shaped path in the measuring tube. The ultrasonic wave is propagated in the ultrasonic gas meter in a U-shaped path, and the effective sound path is equal to the center distance between the upstream ultrasonic transducer and the downstream ultrasonic transducer, so that the effective sound path is not influenced by the cross section height of the measuring tube.
Optionally, as shown in fig. 2, the ultrasonic gas meter further includes an inlet connection pipe 206 and an outlet connection pipe 207, an upstream buffer container 208 is disposed between the inlet connection pipe 206 and the measurement pipe 201, and a downstream buffer container 209 is disposed between the measurement pipe 201 and the outlet connection pipe 207.
Specifically, the fuel gas enters the upstream buffer container 208 from the inlet connection pipe 206, enters the downstream buffer container 209 through the measurement pipe 201, and is output to the fuel gas pipe of the gas supply system through the outlet connection pipe 207. The upstream buffer container 208 and the downstream buffer container 209 can smooth pulsation caused by external factors when gas is fed and discharged respectively, so that the gas flow passing through the measuring pipe 201 is more stable. And by adding the downstream buffer container 209, it is possible to further filter out high frequency components in the fuel gas flowing through the measurement pipe 201, thereby improving the measurement accuracy. In addition, the gas flows only in the sealed space formed by the inlet connection pipe 206, the upstream buffer container 208, the measuring pipe 201, the downstream buffer container 209 and the outlet connection pipe 207, and the sealed space can protect the gas from leakage.
Optionally, the cross-sectional area of the downstream buffer container 209 is larger than the cross-sectional area of the outlet connection 207, and the ratio of the cross-sectional area of the downstream buffer container 209 to the cross-sectional area of the outlet connection 207 is larger than a preset threshold. The preset threshold may be set according to actual requirements, for example, the preset threshold is 5, that is, the cross-sectional area of the downstream buffer container 209 is greater than 5 times the cross-sectional area of the outlet connection tube 207. Therefore, the influence of high-frequency pulsation components in the outlet gas flow on the metering precision, particularly on the precision in small flow can be effectively inhibited.
Alternatively, the cross-sectional shape of the measurement pipe 201 is an axisymmetric figure. For example, the cross-sectional shape of the measurement pipe 201 is rectangular, square, circular, etc. The density distribution of the fuel gas in the measurement pipe 201 is not uniform, and generally the density of the center portion is high and the density of the edge portion is low, and by setting the cross-sectional shape of the measurement pipe 201 to an axisymmetric pattern, the measurement result can be accurately compensated, thereby further improving the measurement accuracy.
Optionally, the inside of the measuring pipe 201 is provided with a plurality of partition plates, the extending direction of each partition plate is the same as the extending direction of the measuring pipe 201, and the plurality of partition plates divide the inside of the measuring pipe 201 into a plurality of chambers, and the plurality of chambers are arranged in axial symmetry on the cross section of the measuring pipe 201.
Specifically, n partition plates may divide the inside of the measurement pipe 201 into (n +1) chambers. The partition plate may be divided into equal parts or unequal parts of the measuring pipe 201. This ultrasonic gas table passes through the inside partition of baffle with survey buret 201 and is a plurality of cavities, can be so that the gas velocity of flow in each cavity increases (especially when gas flow is very little), is favorable to improving the measurement accuracy when the small discharge gas is measured like this. The ultrasonic wave is generally propagated in a centrally located chamber, and by arranging a plurality of chambers in axial symmetry, the measurement accuracy can be ensured.
For ease of understanding, the present embodiment provides three ways of dividing the measurement pipe 201 as shown in fig. 3 to 5, in which d3 and d4 respectively indicate the height and width of the cross section of the measurement pipe 201, as shown in fig. 3, two partition plates 210 equally divide the inside of the measurement pipe 201 into three chambers, and the flow rate of the gas flow through the chamber ② surrounded by the two partition plates 210 increases, so that the measurement accuracy in the measurement of the small flow gas can be improved, similarly, two partition plates 210 in fig. 4 divide the inside of the measurement pipe 201 into three chambers whose cross-sectional areas are not completely equal, and the cross-sectional area of the chamber ② is smaller, and three partition plates 210 equally divide the inside of the measurement pipe 201 into four chambers in fig. 5, taking the cross-sectional shape of the measurement pipe 201 as an example, as a.
Alternatively, the number of the diaphragms may be two, three, four or five, considering that the more the diaphragms are, the greater the pressure loss of the ultrasonic gas meter between the inlet connection pipe 206 and the outlet connection pipe 207 is.
Preferably, the number of the above-mentioned partition plates is two, in this case, three chambers are provided, and the cross-sectional area of the chamber at the center position is not smaller than the cross-sectional area of the upstream ultrasonic transducer 202. At the same time, the cross-sectional area of the centrally located chamber is also not smaller than the cross-sectional area of the downstream ultrasonic transducer 203. This improves the accuracy of the measurement during the measurement of low-flow gas, on the one hand, and facilitates the propagation of the ultrasonic waves in the centrally located chamber and their reception by the upstream ultrasonic transducer 202 or the downstream ultrasonic transducer 203, on the other hand.
Optionally, as shown in fig. 2, the ultrasonic gas meter further includes a cavity 211, and the cavity 211 is used for accommodating the measurement pipe 201, the upstream ultrasonic transducer 202 and the downstream ultrasonic transducer 203. Of course, when the ultrasonic gas meter further includes an inlet connection pipe 206, an outlet connection pipe 207, an upstream buffer container 208, and a downstream buffer container 209, these components are also disposed in the cavity 211. The cavity 211 is used for holding other parts of ultrasonic gas table, and cavity 211 does not have the gas, can provide the gas for ultrasonic gas table and leak the protection for ultrasonic gas table is safer, has also further improved the gas leakage protection level of ultrasonic gas table.
Optionally, the material of the cavity 211 includes metal or rigid foam. The cavity 211 made of metal or rigid foam plastic with the same thickness has good pressure resistance and low price. For example, the chamber 211 is made of a steel plate or an aluminum plate.
Optionally, as shown in fig. 2, lead 212 of upstream ultrasonic transducer 202 and lead 213 of downstream ultrasonic transducer 203 are both disposed within cavity 211. The lead of the ultrasonic transducer is used for supplying power to the ultrasonic transducer, namely driving the ultrasonic transducer to work. Because the cavity 211 is free of fuel gas, the lead 212 of the upstream ultrasonic transducer 202 and the lead 213 of the downstream ultrasonic transducer 203 are not in contact with the fuel gas, and the explosion-proof safety of the ultrasonic gas meter can be improved.
The embodiment of the utility model provides a still provide a gas pipeline, see the schematic diagram of the structure of a gas pipeline that figure 6 is shown, this gas pipeline includes gas pipe 30 and foretell ultrasonic gas table 20, and ultrasonic gas table 20 sets up on gas pipe 30.
The implementation principle and the generated technical effect of the gas pipeline provided by this embodiment are the same as those of the ultrasonic gas meter embodiment, and for brief description, reference may be made to corresponding contents in the ultrasonic gas meter embodiment where no part of the embodiment of the gas pipeline is mentioned.
In all examples shown and described herein, any particular value should be construed as merely exemplary, and not as a limitation, and thus other examples of example embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In addition, in the description of the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (10)
1. The ultrasonic gas meter is characterized by comprising a measuring pipe, an upstream ultrasonic transducer and a downstream ultrasonic transducer, wherein the measuring pipe is used for circulating gas to be measured, and the upstream ultrasonic transducer and the downstream ultrasonic transducer are arranged on the same side of the measuring pipe;
two reflecting surfaces for reflecting ultrasonic waves are arranged in the measuring pipe, so that the ultrasonic waves emitted by the upstream ultrasonic transducer are transmitted to the downstream ultrasonic transducer through a U-shaped path in the measuring pipe.
2. The ultrasonic gas meter according to claim 1, wherein the ultrasonic gas meter comprises an inlet connection pipe and an outlet connection pipe, an upstream buffer container is disposed between the inlet connection pipe and the measurement pipe, and a downstream buffer container is disposed between the measurement pipe and the outlet connection pipe.
3. The ultrasonic gas meter according to claim 2, wherein a cross-sectional area of the downstream buffer container is larger than a cross-sectional area of the outlet connection pipe, and a ratio of the cross-sectional area of the downstream buffer container to the cross-sectional area of the outlet connection pipe is larger than a preset threshold value.
4. The ultrasonic gas meter according to claim 1, wherein the measuring pipe has a cross-sectional shape of an axisymmetric pattern.
5. The ultrasonic gas meter according to claim 4, wherein a plurality of partition plates are provided inside the measurement pipe, each of the partition plates extends in the same direction as the measurement pipe, and the plurality of partition plates partition the inside of the measurement pipe into a plurality of chambers, the plurality of chambers being arranged in axial symmetry in a cross section of the measurement pipe.
6. The ultrasonic gas meter according to claim 5, wherein the number of the partition plates includes two, and the cross-sectional area of the chamber at the center position is not smaller than the cross-sectional area of the upstream ultrasonic transducer.
7. The ultrasonic gas meter according to claim 1, further comprising a cavity for accommodating the measurement pipe, the upstream ultrasonic transducer and the downstream ultrasonic transducer.
8. The ultrasonic gas meter according to claim 7, wherein the cavity is made of metal or rigid foam.
9. The ultrasonic gas meter according to claim 7, wherein the lead of the upstream ultrasonic transducer and the lead of the downstream ultrasonic transducer are both disposed in the cavity.
10. A gas pipeline, characterized by comprising a gas pipe and the ultrasonic gas meter according to any one of claims 1 to 9, the ultrasonic gas meter being provided on the gas pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921389479.7U CN210135957U (en) | 2019-08-26 | 2019-08-26 | Ultrasonic gas meter and gas pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921389479.7U CN210135957U (en) | 2019-08-26 | 2019-08-26 | Ultrasonic gas meter and gas pipeline |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210135957U true CN210135957U (en) | 2020-03-10 |
Family
ID=69708799
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921389479.7U Active CN210135957U (en) | 2019-08-26 | 2019-08-26 | Ultrasonic gas meter and gas pipeline |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210135957U (en) |
-
2019
- 2019-08-26 CN CN201921389479.7U patent/CN210135957U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP3268701B1 (en) | Hybrid sensing ultrasonic flowmeter | |
| US8701501B2 (en) | Ultrasonic flowmeter | |
| PL173732B1 (en) | Fluid flow meter | |
| CN212567542U (en) | Ultrasonic gas meter measuring device and ultrasonic gas meter | |
| JP2004264064A (en) | Ultrasonic flow rate measuring apparatus | |
| EP1742024A1 (en) | Ultrasonic flowmeter with triangular cross section | |
| CN114088151A (en) | External clamping type multi-channel ultrasonic flow detection device and detection method | |
| CN210135957U (en) | Ultrasonic gas meter and gas pipeline | |
| CN211740309U (en) | Ultrasonic flow metering device | |
| CN207963973U (en) | A kind of ultrasonic flowmeter unit and device | |
| EP3035006A2 (en) | Apparatus and a method for providing a time measurement | |
| JP2004347374A (en) | Ultrasonic fluid sensor | |
| CN214149456U (en) | Gas metering bin structure for ultrasonic gas meter | |
| CN216283723U (en) | Arc-shaped and broken-line sound path ultrasonic gas meter flow passage device | |
| CN209820549U (en) | Flexible measuring sound channel for commercial ultrasonic gas meter | |
| CN219084154U (en) | Ultrasonic flowmeter | |
| CN107490406B (en) | Ultrasonic vortex street flowmeter | |
| CN113418573A (en) | Laminar flow type gas measurement flow channel, flow meter, flow measurement method and system | |
| CN218724397U (en) | Flow channel assembly of correlation type ultrasonic gas meter, gas meter assembly and ultrasonic gas meter | |
| JP7373772B2 (en) | Physical quantity measuring device | |
| CN111272240A (en) | Built-in oblique reflection multichannel ultrasonic flow measurement module and flowmeter | |
| JP2008014829A (en) | Ultrasonic flowmeter | |
| CN218822555U (en) | Correlation formula gas flow measuring instrument runner subassembly and flow measuring instrument | |
| EP3992588B1 (en) | Ultrasonic flow tube | |
| JP3355130B2 (en) | Pulsation absorption structure of flow meter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |