CN212340336U - Measuring pipe body structure for ultrasonic gas meter - Google Patents
Measuring pipe body structure for ultrasonic gas meter Download PDFInfo
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- CN212340336U CN212340336U CN202020638140.2U CN202020638140U CN212340336U CN 212340336 U CN212340336 U CN 212340336U CN 202020638140 U CN202020638140 U CN 202020638140U CN 212340336 U CN212340336 U CN 212340336U
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- 238000005259 measurement Methods 0.000 claims abstract description 51
- 238000007789 sealing Methods 0.000 claims abstract description 22
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Abstract
The utility model relates to a measure body structure for ultrasonic wave gas meter, it includes: a first port air chamber, a second port air chamber, a linear measuring tube, a first ultrasonic sensor, a second ultrasonic sensor and a sealing bolt; the central axes of the first ultrasonic sensor and the second ultrasonic sensor are coincided with the central axis of the linear measuring pipe. The utility model buffers the port air chambers designed at the two ends of the ultrasonic gas meter, and ensures the stable air flow in the measuring pipeline; the linear measuring pipeline is used for measuring, the flow velocity measuring sensitivity is high, and the flow measurement accuracy of the ultrasonic gas meter is good; the appearance is simple, easily processes and assembles to have good sealed effect.
Description
Technical Field
The utility model relates to a measure body structure for ultrasonic wave gas meter belongs to metering equipment technical field.
Background
In recent years, the natural gas industry in China is rapidly developed, annual consumption is increased year by year, and according to related data, the total natural gas consumption in China is 173 billion cubic meters in 1994, the total natural gas consumption in China is increased to 1076 billion cubic meters in 2010, the annual growth rate is high, and by 2016, the data is doubled and reaches 2058 billion cubic meters. Although the production and consumption of natural gas have slowed down in recent years, the market remains very large. In addition, with the adjustment of national industrial energy structures, natural gas belongs to clean energy, and the occupation ratio in the national energy structures is gradually increased, however, the existing natural gas settlement mode for residents in China is relatively old, so that the natural gas settlement method is not beneficial to the statistics and resource allocation of national data, and is also inconvenient for residents to use natural gas resources.
From 2005, the gas prevalence rate of cities is increased year by year, reaches 91.4% by 2009, and after twelve five years, the gas prevalence rate of cities reaches more than 94%, the gas prevalence rate of counties and cities reaches more than 65%, and gas households reach 2 hundred million households. The related data show that the market scale of the membrane gas meter in China is about tens of millions.
In 2016, Shanghai city has started three meters of water, electricity and gas to collect and copy, the original channel for automatically collecting and copying electricity meters is utilized to upload data of intelligent water meters and gas meters with different communication structures to a power concentrator in a power line carrier or short-distance wireless mode and the like, and the original electricity utilization information acquisition system is utilized to transmit the data to a background data server. Therefore, convenience of 'no meter reading and no community payment' of the vast residents is realized. Three-table and four-table centralized reading in the whole country is also an important development direction of the future digital society. Because the traditional membrane type gas meter adopts a mechanical structure to measure the gas flow, intelligent integration is difficult to carry out, and therefore a new-generation intelligent gas meter which is more accurate, efficient and stable is required to replace the traditional membrane type natural gas meter.
The thirteen-five period (2016-. Under the guidance of the policy of the continuous deep reformation of the country, the development environment of the natural gas industry is changed remarkably. The continuous development and popularization of the natural gas industry can greatly promote the development of intelligent gas meters.
At present, the traditional intelligent gas meter has many problems when solving the gas customer pain point, such as unstable data transmission, high power consumption and low meter reading success rate. The ultrasonic electronic gas meter which adopts the ultrasonic flow measurement technology and is provided with the internet of things functional module has the characteristics of high safety, wide coverage, large connection, low power consumption, low cost and the like, can better solve the problems, and better meets the development requirements of gas customers. However, the conventional ultrasonic electronic gas meter has low sensitivity in measuring the gas flow.
SUMMERY OF THE UTILITY MODEL
The core technology of the ultrasonic gas meter is to accurately measure the gas flow. The utility model aims at providing a measure body structure for ultrasonic wave gas meter has adopted the mode of ultrasonic measurement gas velocity of flow, can measure the velocity of flow of the inside gas of pipeline/natural gas/coal gas accurately.
A measurement tube structure for an ultrasonic gas meter, comprising: a first port air chamber, a second port air chamber, a linear measuring tube, a first ultrasonic sensor, a second ultrasonic sensor and a sealing bolt; the central axes of the first ultrasonic sensor and the second ultrasonic sensor are coincided with the central axis of the linear measuring pipe.
A measurement tube structure for an ultrasonic gas meter, comprising: a first port air chamber, the first port air chamber having an air inlet; the second port air chamber is provided with an air outlet; a linear measuring tube; a first ultrasonic sensor; a second ultrasonic sensor; and a sealing bolt; the two opposite ends of the linear measuring pipe are respectively inserted into the first port air chamber and the second port air chamber; the central axes of the first ultrasonic sensor and the second ultrasonic sensor are coincided with the central axis of the linear measuring pipe.
Compared with the prior art, the utility model provides an among the measurement body structure for ultrasonic wave gas meter, the central axis of first ultrasonic sensor, second ultrasonic sensor coincides with the central axis that the pipe was surveyed to the linear type, and the linear type measurement section distance is longer, and the distance that the ultrasonic wave propagated in the air current is also longer, can show improvement velocity of flow measurement sensitivity to can reduce measurable minimum flow and measure the blind spot.
Drawings
Fig. 1 is a schematic structural diagram of a measurement tube structure for an ultrasonic gas meter according to the present invention.
Fig. 2 is a rendering of the structure of the measurement tube for the ultrasonic gas meter shown in fig. 1.
FIG. 3 is a front cross-sectional view of the measurement tube structure for the ultrasonic gas meter shown in FIG. 1.
FIG. 4 is a standard three-dimensional view of the measurement tube structure for the ultrasonic gas meter shown in FIG. 1.
Fig. 5 is a schematic view of the measurement principle of the ultrasonic gas meter provided by the present invention.
Fig. 6 is an error result of an actual test of two gas meters based on the structure of the measuring tube body for the ultrasonic gas meter shown in fig. 1.
Description of the main elements
First port gas tank 12
First via 124
Second via 126
Second port gas capsule 14
Third via 144
Fourth via 146
First ultrasonic sensor 11
Second ultrasonic sensor 13
Through hole 152
The following detailed description of the invention will be further described in conjunction with the above-identified drawings.
Detailed Description
The following will explain in detail the measuring tube structure for an ultrasonic gas meter according to the present invention with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1 to 4, a measurement tube structure 10 of an ultrasonic gas meter according to the present invention includes a first port chamber 12, a second port chamber 14, a linear measurement tube 16, a first ultrasonic sensor 11, a second ultrasonic sensor 13, and two sealing bolts 18.
The first port plenum 12 has an air inlet 122, a first through-hole 124 and a second through-hole 126. The air inlet 122 is the air inlet 122 of the entire measuring tube structure 10. The second port gas capsule 14 has an outlet port 142, a third through-hole 144 and a fourth through-hole 146. The air outlet 142 is the air outlet 142 of the whole measuring tube structure 10. Preferably, the gas inlet 122 and gas outlet 142 are located on the same side of the linear measurement duct 16. In this embodiment, the gas inlet 122 and gas outlet 142 are located on the upper side of the linear measurement duct 16.
The linear meter tube 16 is a hollow tubular structure having a first end 162 and a second end 164 opposite the first end 162. The first port chamber 12 is connected to a first end 162 of the linear meter duct 16, and the second port chamber 14 is connected to a second end 164 of the linear meter duct 16. The first port chamber 12 and the second port chamber 14 are symmetrically disposed at opposite ends of the linear gauging pipe 16. Specifically, the first end 162 of the linear measurement duct 16 is disposed at the second through-hole 126 of the first port chamber 12, and the second end 164 of the linear measurement duct 16 is disposed at the third through-hole 144 of the second port chamber 14. In this embodiment, the first end 162 of the linear measurement duct 16 is inserted into the first port chamber 12 from the second through hole 126 of the first port chamber 12, and the second end 164 of the linear measurement duct 16 is inserted into the second port chamber 14 from the third through hole 144 of the second port chamber 14. The first port gas chamber 12 and the second port gas chamber 14 are hermetically connected to the linear measurement pipe 16 by a sealing ring or sealant, and are fixed by bolts or steel hoops. Preferably, the first end 162 and the second end 164 are flared.
The first ultrasonic sensor 11 is arranged at one side of the first port air chamber 12 far away from the linear measuring pipe 16, and the second ultrasonic sensor 13 is arranged at one side of the second port air chamber 14 far away from the linear measuring pipe 16. Specifically, the first ultrasonic sensor 11 is disposed at the first through hole 124 of the first port chamber 12, the second ultrasonic sensor 13 is disposed at the fourth through hole 146 of the second port chamber 14, and the central axes of the first ultrasonic sensor 11 and the second ultrasonic sensor 13 coincide with the central axis of the linear measurement pipe 16. That is, the angles formed by the central axes of the first ultrasonic sensor 11 and the second ultrasonic sensor 13 and the central axis of the linear measurement pipe 16 are zero. The first ultrasonic sensor 11 and the second ultrasonic sensor 13 are symmetrically disposed at opposite ends of the linear measurement pipe 16, but are not in direct contact with opposite ends (the first end 162 and the second end 164) of the linear measurement pipe 16. In the present embodiment, the center axes of the first ultrasonic sensor 11 and the second ultrasonic sensor 13 are parallel to and coincide with the center axis of the linear measurement pipe 16.
A sealing bolt 18 is arranged on one side, away from the first port air chamber 12, of the first ultrasonic sensor 11, and a sealing bolt 18 is arranged on one side, away from the second port air chamber 14, of the second ultrasonic sensor 13. A wire outlet hole 182 is formed in the center of the sealing bolt 18, so that the wires of the first ultrasonic sensor 11 and the second ultrasonic sensor 13 pass through the wire outlet hole 182 to be connected with an external circuit.
Further, the measuring tube body structure 10 for the ultrasonic gas meter may further include a disk 15, the disk 15 having a through hole 152, and the linear measuring tube 16 is inserted into the first port chamber 12 and the second port chamber 14 through the through hole 152 of the disk 15. The disc 15 is arranged between the first port air chamber 12 and the second port air chamber 14, is used for being connected with the first port air chamber 12 and the second port air chamber 14, can also be sealed by using a sealing ring or a sealant, and is fixed by using a bolt or a steel hoop.
That is, the main structure of the measuring tube body structure 10 for the ultrasonic gas meter is divided into three parts, namely, a left part, a middle part and a right part. The left and right parts are symmetrically arranged, the upper parts are respectively provided with an air inlet 122 and an air outlet 142, and the interior is a hollow air chamber. The left and right parts are both port air chambers, and the middle part is a disc 15 and a linear measuring section (a linear measuring pipe 16). The disc 15 is used for connecting with the port air chambers of the left and right parts, and sealing can be realized by using a sealing ring or sealant, and the disc is fixed by using bolts or steel hoops. The two ends of the linear measuring section are respectively inserted into the left port air chamber and the right port air chamber, and the horn mouth structures at the two ends of the linear measuring section play a role in stabilizing air flow. The ultrasonic sensors are arranged on the left side and the right side of the main body structure and are fixed by using the sealing bolts 18, and wire outlet holes 182 are reserved on the sealing bolts 18 for leading out of wires of the ultrasonic sensors. The left part (the first port air chamber 12), the right part (the second port air chamber 14) and the middle part (the linear measuring pipe 16) are connected in a sealing mode through sealing rings or sealing glue and are fixed through bolts or steel hoops.
Referring to fig. 5, when the measuring tube body structure 10 for an ultrasonic gas meter is used, the gas flow flows into the first port chamber 12 from the gas inlet 122, is decelerated in the first port chamber 12, then flows into the linear measuring tube 16 from the first end 162 of the linear measuring tube 16, flows through the measuring section (the linear measuring tube 16), flows out from the second end 164 of the linear measuring tube 16, enters the second port chamber 14, and finally is discharged from the gas outlet 142.
The utility model discloses a measure the gas velocity of flow for measuring body structure 10 and ultrasonic wave time difference method measurement principle of ultrasonic wave gas meter to further calculate gas flow. The flow of the gas causes the first ultrasonic sensor 11 and the second ultrasonic sensor 13 to receive the ultrasonic signals of the other party at different times, and the magnitude of the time difference is in positive correlation with the gas flow rate. The gas flow rate inside the measuring tube structure 10 can be measured according to this principle. The type of the ultrasonic gas meter is not limited, and the ultrasonic gas meter can be used, for example. In this embodiment, the ultrasonic gas meter is an ultrasonic gas meter.
Fig. 6 shows error results of actual tests of two ultrasonic gas meters based on the measuring pipe structure 10, and it can be seen from fig. 6 that the measurement accuracy of the two ultrasonic gas meters reaches the standard. Therefore, experiments prove that the measuring tube body structure 10 for the ultrasonic gas meter can optimize the stability of fluid and reduce the measurement error.
Further, the smaller the diameter of the linear measuring tube 16, the more significant the throttling effect, i.e., the flow rate of the gas flowing through the linear measuring tube 16 increases with the decrease of the tube diameter, while the pressure loss of the measuring tube structure 10 of the ultrasonic gas meter increases with the decrease of the tube diameter of the linear measuring tube 16. Therefore, the diameter of the linear measuring pipe 16 can be minimized to maximize the flow velocity of the gas in the linear measuring pipe 16, thereby improving the detection sensitivity of the flow velocity and improving the minimum flow detection lower limit, while satisfying the national pressure loss criterion (i.e., less than the national pressure loss criterion). Therefore, it is possible to further improve the detection sensitivity of the flow velocity and lower the minimum flow detection lower limit by reducing the diameter of the linear measurement pipe 16.
The measuring tube structure 10 for an ultrasonic gas meter has the following advantages: the central axes of the first ultrasonic sensor 11 and the second ultrasonic sensor 13 are coincident with the central axis of the linear measuring tube 16, and the distance of the linear measuring section is longer, so that the distance of ultrasonic wave propagating in the airflow is longer, the flow velocity measuring sensitivity can be obviously improved, the measurable minimum flow can be reduced, and the measuring dead zone can be reduced; the second and first port air chambers 12 and the second port air chamber 14 are respectively positioned at two ends of the linear measuring pipe 16, and the port air chambers at the two ends of the linear measuring pipe 16 have good buffering and flow stabilizing effects on airflow, so that a flow field in a measuring pipeline is stable, and measuring noise can be controlled; thirdly, the stability of the fluid can be optimized, and the measurement error is reduced; fourthly, the appearance is simple, the processing and the assembly are easy, and the sealing effect is good; fifth, the detection sensitivity of the flow velocity can be further improved and the detection lower limit of the minimum flow rate can be reduced by reducing the diameter of the linear measurement pipe 16; sixthly, since the measuring pipe body structure 10 is a symmetrical structure, that is, the first port air chamber 12 and the second port air chamber 14 are symmetrically arranged, the first ultrasonic sensor 11 and the second ultrasonic sensor 13 are symmetrically arranged, and the two sealing bolts 18 are also symmetrically arranged, the two port air chambers, the two ultrasonic sensors, the two sealing bolts and the linear measuring pipe 16 can be assembled into the measuring pipe body structure 10, so that the manufacturing method is simple, and mass production is facilitated.
In addition, other changes may be made by those skilled in the art without departing from the spirit of the invention, and it is intended that all such changes be considered within the scope of the invention as hereinafter claimed.
Claims (10)
1. A measurement tube structure for an ultrasonic gas meter, comprising:
a first port gas chamber;
a second port gas chamber;
a linear measuring tube;
a first ultrasonic sensor;
a second ultrasonic sensor; and
a seal bolt; wherein the central axes of the first and second ultrasonic sensors coincide with the central axis of the linear measuring tube.
2. The measurement tube structure for an ultrasonic gas meter as set forth in claim 1, wherein the central axes of said first ultrasonic sensor and said second ultrasonic sensor are parallel to and coincident with the central axis of said linear measurement tube.
3. The measurement tube body structure for an ultrasonic gas meter according to claim 1, wherein opposite ends of the linear measurement tube are inserted into the first port chamber and the second port chamber, respectively.
4. The measurement tube structure for an ultrasonic gas meter as set forth in claim 1, wherein said first ultrasonic sensor and said second ultrasonic sensor are symmetrically disposed at opposite ends of said linear measurement tube.
5. The measurement tube structure for an ultrasonic gas meter as set forth in claim 1, wherein said first port chamber has an air inlet, said second port chamber has an air outlet, and said air inlet and said air outlet are located on the same side of said linear measurement tube.
6. The measurement tube body structure for an ultrasonic gas meter as set forth in claim 1, wherein both ends of said linear measurement tube are bell-mouthed.
7. The measurement tube structure for an ultrasonic gas meter according to claim 1, wherein the first ultrasonic sensor is disposed on a side of the first port chamber remote from the linear measurement tube, and the second ultrasonic sensor is disposed on a side of the second port chamber remote from the linear measurement tube.
8. The measurement tube structure for an ultrasonic gas meter according to claim 1, wherein the sealing bolt is provided on a side of the first ultrasonic sensor away from the first port gas chamber, and the sealing bolt is provided on a side of the second ultrasonic sensor away from the second port gas chamber.
9. The measurement tube structure for an ultrasonic gas meter according to claim 1, further comprising a disk having a through hole, the disk being disposed between the first port chamber and the second port chamber, the linear measurement tube being inserted through the through hole into the first port chamber and the second port chamber, respectively.
10. A measurement tube structure for an ultrasonic gas meter, comprising:
a first port air chamber, the first port air chamber having an air inlet;
the second port air chamber is provided with an air outlet;
a linear measuring tube;
a first ultrasonic sensor;
a second ultrasonic sensor; and
a seal bolt; the linear type measuring pipe is characterized in that two opposite ends of the linear type measuring pipe are respectively inserted into the first port air chamber and the second port air chamber; the central axes of the first ultrasonic sensor and the second ultrasonic sensor are coincided with the central axis of the linear measuring pipe.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020638140.2U CN212340336U (en) | 2020-04-24 | 2020-04-24 | Measuring pipe body structure for ultrasonic gas meter |
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| CN202020638140.2U CN212340336U (en) | 2020-04-24 | 2020-04-24 | Measuring pipe body structure for ultrasonic gas meter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111595397A (en) * | 2020-04-24 | 2020-08-28 | 清华大学 | Measuring pipe body structure for ultrasonic gas meter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111595397A (en) * | 2020-04-24 | 2020-08-28 | 清华大学 | Measuring pipe body structure for ultrasonic gas meter |
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