CN113188616A - Gas component detection method for natural gas ultrasonic flowmeter - Google Patents
Gas component detection method for natural gas ultrasonic flowmeter Download PDFInfo
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- CN113188616A CN113188616A CN202110243262.0A CN202110243262A CN113188616A CN 113188616 A CN113188616 A CN 113188616A CN 202110243262 A CN202110243262 A CN 202110243262A CN 113188616 A CN113188616 A CN 113188616A
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 104
- 239000007789 gas Substances 0.000 title claims abstract description 92
- 239000003345 natural gas Substances 0.000 title claims abstract description 52
- 238000001514 detection method Methods 0.000 title claims abstract description 51
- 238000012360 testing method Methods 0.000 claims description 8
- 230000006641 stabilisation Effects 0.000 claims description 7
- 238000011105 stabilization Methods 0.000 claims description 7
- 230000000087 stabilizing effect Effects 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims description 2
- 238000013100 final test Methods 0.000 claims 1
- 239000003381 stabilizer Substances 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 12
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/66—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by measuring frequency, phase shift or propagation time of electromagnetic or other waves, e.g. using ultrasonic flowmeters
- G01F1/662—Constructional details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/66—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by measuring frequency, phase shift or propagation time of electromagnetic or other waves, e.g. using ultrasonic flowmeters
- G01F1/667—Arrangements of transducers for ultrasonic flowmeters; Circuits for operating ultrasonic flowmeters
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
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- Life Sciences & Earth Sciences (AREA)
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- Engineering & Computer Science (AREA)
- Measuring Volume Flow (AREA)
- Health & Medical Sciences (AREA)
- Electromagnetism (AREA)
- Medicinal Chemistry (AREA)
- Food Science & Technology (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
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- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
The invention discloses a method and a device for detecting gas components of a natural gas ultrasonic flowmeter, relates to the technical field of metering detection, and solves the problem that the conventional natural gas ultrasonic flowmeter cannot realize gas component detection. The main technical scheme of the invention is as follows: a gas component detection device is arranged in the ultrasonic flowmeter, and the ultrasonic flowmeter with the gas component detection function is arranged on a pipeline; and detecting the gas components passing through the pipeline according to the ultrasonic flowmeter with the gas detection function. The invention is mainly used for perfecting the gas detection function of the natural gas ultrasonic flowmeter.
Description
Technical Field
The invention relates to the technical field of measurement, in particular to a natural gas ultrasonic meter with a gas component detection function.
Background
The metering of natural gas flow is an extremely important part in the natural gas pipeline industry, and the accuracy of the measured data directly influences the economic benefit of a production enterprise and the benefit of a user. In recent years, ultrasonic flow meters have started to use a large number of fixed ultrasonic flow meters as natural gas meters for many users, the ultrasonic flow meters measure the flow rate of natural gas by using the propagation time difference method, and the propagation time difference method of ultrasonic flow meters works by using ultrasonic transducers to alternately (or simultaneously) transmit and receive ultrasonic pulses in opposite directions, indirectly measure the flow rate of fluid by detecting and calculating the propagation time difference between forward flow and reverse flow of the medium, and then calculate the flow rate by using the flow rate. In addition, the propagation speed and the loss coefficient of the ultrasonic wave in different gas media are different, and the propagation time of the ultrasonic wave in the gas media can be utilized to distinguish different gas components according to the difference of the propagation speed of the ultrasonic wave in different gas media, so that the gas components can be judged.
Disclosure of Invention
In view of the above, embodiments of the present invention provide a method and an apparatus for detecting a gas component of a natural gas ultrasonic flowmeter, which mainly aim to solve the problem that the conventional ultrasonic flowmeter cannot detect a gas component, and cannot determine a gas component passing through the flowmeter. Therefore, the metering accuracy of the ultrasonic flowmeter is improved. In order to achieve the purpose, the invention mainly provides the following technical scheme:
the gas component detection module is installed at a reserved position inside the ultrasonic flowmeter, the gas component detection device is located in a flow channel of the ultrasonic flowmeter, and the gas component detection module of the ultrasonic flowmeter comprises an external shell with a flow guide hole, a gas stabilizing cover, an ultrasonic transducer and an ultrasonic reflection plate. The gas stabilizing cover mainly acts to stabilize the natural gas entering the gas detection device in the flow channel, the flow rate of the natural gas entering the gas stabilizing cover is approximately zero, the flow rate of the natural gas can be approximately corrected to 0 through a correction algorithm, the ultrasonic transducer and the ultrasonic reflection plate are positioned in the gas stabilizing cover, and the ultrasonic transducer and the ultrasonic reflection plate are positioned on the same horizontal line.
The transmission speed of various gas components in a storage module of the MCU is preset, natural gas circulating in the flowmeter enters the gas component detection module after passing through an external gas stabilization cover of the gas component detection module, and the flowing speed of the gas in the gas component detection device is approximate to 0 at the moment. The ultrasonic wave is transmitted by the ultrasonic wave transducer, the ultrasonic wave transducer is switched to an ultrasonic wave receiving mode after transmitting the ultrasonic wave, the ultrasonic wave is reflected back to the ultrasonic wave transducer after being transmitted to the ultrasonic wave reflecting plate, and the propagation speed of the ultrasonic wave in the natural gas is calculated according to the formula (1).
V＝2L/T (1)
Wherein V is the propagation velocity of ultrasonic waves in the natural gas in the gas component detection apparatus, m/ms or m/us;
l is the distance between the ultrasonic transducer and the ultrasonic reflection plate, m;
t is the time interval from the transmitting moment of the ultrasonic wave transducer to the receiving moment of the ultrasonic wave transducer, ms/us.
Drawings
Fig. 1 is a schematic view of an overall structure of a natural gas ultrasonic meter with a gas component detection function according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an ultrasonic component detection apparatus of a natural gas ultrasonic meter with a gas component detection function according to an embodiment of the present invention;
the reference signs are: the device comprises a MCU (microprogrammed control Unit) main control module, a natural gas flow acquisition ultrasonic transducer, a natural gas component detection device, an external gas stabilization cover, an ultrasonic reflection plate and an ultrasonic transducer, wherein the natural gas flow acquisition ultrasonic transducer comprises 1, the natural gas component detection device comprises 4, the external gas stabilization cover comprises 5, the ultrasonic reflection plate comprises 6
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.
Referring to fig. 1, to further illustrate the technical means and effects of the present invention for achieving the predetermined objects, the following detailed description will be given of the gas composition detecting method and apparatus of the ultrasonic natural gas flowmeter according to the present invention, with reference to the accompanying drawings and preferred embodiments, and the detailed description thereof.
Referring to fig. 1 and fig. 2, an embodiment of the present invention provides a method and an apparatus for detecting a gas component of a natural gas ultrasonic flowmeter, where the method for detecting a gas component of a natural gas ultrasonic flowmeter includes:
specifically, this embodiment is to there is not the gas composition to detect the function for the natural gas ultrasonic flowmeter in the existing market to gas composition detects and needs in addition to add professional gas component check out test set on the pipeline in the existing market, and the operation is more loaded down with trivial details. In order to solve the above problem, the present embodiment provides a method for detecting a gas component of a natural gas ultrasonic flowmeter, which can mount an ultrasonic flowmeter with a gas component detection function on a pipeline to perform gas component detection.
Specifically, this embodiment is to the detection of the gas composition of the natural gas in the present natural gas line, and the instrument on the market all needs to add extra equipment on the pipeline to calculate at present in the in-process that detects, needs to dismantle and separate the pipeline, and is comparatively loaded down with trivial details and influence the efficiency of calibration in operation, for solving foretell problem, this embodiment provides a gas composition detection method of natural gas ultrasonic flowmeter, can use the ultrasonic flowmeter who takes gas composition detection function to use, need not install professional gas composition check out test set. In the specific implementation, an ultrasonic flowmeter with a gas component detection module is selected and installed in the natural gas pipeline.
According to the above list, the embodiment of the present invention provides a method for detecting a gas component of a natural gas ultrasonic flowmeter, which is capable of detecting a gas component by installing an ultrasonic flowmeter having a gas detection module for detecting a gas component of a natural gas in a fixed pipeline.
As shown in fig. 1 and 2, in the present embodiment, an ultrasonic gas detection device is installed on an inner wall of a flow channel of an ultrasonic flow meter, a flow rate Vb of ultrasonic waves in each gas component of natural gas is preset inside an MCU main control module 1 shown in the figure, and calculated gas component data is sent to a CPU unit or various additional transmission devices for data transmission. A pair of natural gas flow capturing ultrasonic transducers 2 are shown for testing the natural gas flow rate in the ultrasonic flow channel. The natural gas enters the gas component detection device through a small hole on one side close to the flow channel of the natural gas component detection device 3. The natural gas entering the inside of the gas component detecting apparatus reduces the gas flow velocity to approximately zero by the outer gas stabilization cap 4. After the gas component in the gas component detection device is sufficiently mixed with the gas component in the flow passage after the gas component is stabilized for a certain period of time, the ultrasonic transducer 6 in the gas component detection device emits ultrasonic waves. After the ultrasonic wave is transmitted by the ultrasonic transducer 6 in the transmitting state, the ultrasonic wave enters an ultrasonic wave receiving mode, and at the moment, the transmitted ultrasonic wave is transmitted to the ultrasonic wave reflecting plate 5 and then returns according to the same path L. The ultrasonic transducer 6 receives the ultrasonic waves, and the time for transmitting the ultrasonic waves in the distance of 2L can be calculated by recording the time value between the sending time and the receiving time, so that the propagation speed of the ultrasonic waves in the natural gas can be calculated by the formula (1).
It should be noted that in the description of the present specification, the terms "side wall", "same horizontal line", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and operate, and thus cannot be understood as an ultrasonic flow meter with a gas component detection function of the present invention. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the spirit and scope of the invention as defined in the appended claims. The techniques, shapes, and configurations not described in detail in the present invention are all known techniques.
Claims (5)
1. A gas component detection method for a natural gas ultrasonic flowmeter is characterized by comprising the following steps:
installing a gas component detection device inside the ultrasonic flowmeter, wherein the gas component detection device is positioned on the inner wall of a pipeline in the ultrasonic flowmeter;
the gas component detection device of the ultrasonic flowmeter comprises an external shell, an external gas stabilizing device, an ultrasonic transducer and an ultrasonic reflection plate;
wherein, the outer shell is provided with a small hole at a proper position close to the direction of the flow passage for the entry of external natural gas;
wherein the external gas stabilizer is made of a gas-permeable material for reducing the flow rate of external gas;
the ultrasonic transducer and the ultrasonic transmitting device are positioned at the same height, and the ultrasonic signal transmitted by the ultrasonic transducer is over against the ultrasonic reflecting device.
2. The gas component detection method of the ultrasonic natural gas flowmeter as claimed in claim 1, wherein:
the gas composition detection module of the ultrasonic flowmeter comprises an external gas stabilization cover, an ultrasonic transducer and an ultrasonic reflection plate; and the ultrasonic transducer and the ultrasonic reflection plate are positioned in the external gas stabilization cover, and the ultrasonic transducer and the ultrasonic reflection plate are positioned on the same horizontal line.
3. The gas component detection method of the ultrasonic natural gas flowmeter as claimed in claim 1, wherein:
presetting the transmission speed of ultrasonic waves in various gas components in a flowmeter MCU in advance; the natural gas in the flow passage of the flowmeter enters the gas detection device after passing through the external gas stabilization cover of the gas component detection device, and the flow speed of the gas in the gas component detection module is approximately 0 at the moment; the ultrasonic transducer transmits ultrasonic waves, the ultrasonic transducer is switched to an ultrasonic receiving mode after transmitting the ultrasonic waves, the ultrasonic waves are reflected back to the ultrasonic transducer after being transmitted to the ultrasonic reflecting plate, and the propagation speed of the ultrasonic waves in the natural gas is calculated according to the formula (1);
Vc＝2L/T (1)
wherein Vc is the propagation speed of the ultrasonic wave in the natural gas in the gas component detection apparatus, m/ms or m/us;
l is the distance between the ultrasonic transducer and the ultrasonic reflection plate, m;
t is the time interval from the transmitting moment of the ultrasonic wave transducer to the receiving moment of the ultrasonic wave transducer, ms/us.
4. The gas component detection method of the ultrasonic natural gas flowmeter as claimed in claim 3, wherein:
testing the flow velocity of ultrasonic waves in various natural gas components in an ultrasonic flow velocity detection device in advance, and presetting analyzed data into a storage module of an MCU (microprogrammed control Unit) after modeling and analyzing the measured data;
and comparing the test value Vc in actual use with the reference value Vb of the flow rate of the ultrasonic waves in the storage module of the preset MCU to obtain the actual gas components.
5. The gas component detection method of the ultrasonic natural gas flowmeter as claimed in claim 4, wherein:
the ultrasonic velocity value Vc inside the gas detection module is calculated by a formula (1), and the test value Vc is obtained by performing at least m times of tests;
and (3) at least n times of ultrasonic velocity measurement is carried out at each test interval in a preset time, and the final test velocity Vc is obtained by calculating the n x m values according to the arithmetic mean value.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110243262.0A CN113188616A (en) | 2021-03-05 | 2021-03-05 | Gas component detection method for natural gas ultrasonic flowmeter |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110243262.0A CN113188616A (en) | 2021-03-05 | 2021-03-05 | Gas component detection method for natural gas ultrasonic flowmeter |
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| CN113188616A true CN113188616A (en) | 2021-07-30 |
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| CN202110243262.0A Pending CN113188616A (en) | 2021-03-05 | 2021-03-05 | Gas component detection method for natural gas ultrasonic flowmeter |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1319185A (en) * | 1998-09-11 | 2001-10-24 | 松下电器产业株式会社 | Gas identification system |
| US20020062681A1 (en) * | 2000-11-30 | 2002-05-30 | Livingston Richard A. | Oxygen sensor and flow meter device |
| CN102830164A (en) * | 2012-08-23 | 2012-12-19 | 郑州光力科技股份有限公司 | On-line detection method and apparatus of methane concentration |
| CN203499768U (en) * | 2013-08-23 | 2014-03-26 | 安徽恒源煤电股份有限公司 | Low-noise pneumatic motor for anchor drilling machine |
| CN104246492A (en) * | 2012-03-19 | 2014-12-24 | 吉坤日矿日石能源株式会社 | Method for determining composition of gas fuel, device for determining composition of gas fuel, fuel supply system, and fuel cell system |
| CN106248148A (en) * | 2016-09-22 | 2016-12-21 | 深圳市润普科技有限公司 | Supersonic gas body sensor |
| CN209902241U (en) * | 2019-01-28 | 2020-01-07 | 青岛富泰兴碳素制品有限公司 | Stopper rod for horizontal continuous casting production |
-
2021
- 2021-03-05 CN CN202110243262.0A patent/CN113188616A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1319185A (en) * | 1998-09-11 | 2001-10-24 | 松下电器产业株式会社 | Gas identification system |
| US20020062681A1 (en) * | 2000-11-30 | 2002-05-30 | Livingston Richard A. | Oxygen sensor and flow meter device |
| CN104246492A (en) * | 2012-03-19 | 2014-12-24 | 吉坤日矿日石能源株式会社 | Method for determining composition of gas fuel, device for determining composition of gas fuel, fuel supply system, and fuel cell system |
| CN102830164A (en) * | 2012-08-23 | 2012-12-19 | 郑州光力科技股份有限公司 | On-line detection method and apparatus of methane concentration |
| CN203499768U (en) * | 2013-08-23 | 2014-03-26 | 安徽恒源煤电股份有限公司 | Low-noise pneumatic motor for anchor drilling machine |
| CN106248148A (en) * | 2016-09-22 | 2016-12-21 | 深圳市润普科技有限公司 | Supersonic gas body sensor |
| CN209902241U (en) * | 2019-01-28 | 2020-01-07 | 青岛富泰兴碳素制品有限公司 | Stopper rod for horizontal continuous casting production |
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Application publication date: 20210730 |