CN112763008A - Gas flow measuring station - Google Patents
Gas flow measuring station Download PDFInfo
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- CN112763008A CN112763008A CN202011407935.3A CN202011407935A CN112763008A CN 112763008 A CN112763008 A CN 112763008A CN 202011407935 A CN202011407935 A CN 202011407935A CN 112763008 A CN112763008 A CN 112763008A
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- gas flow
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- flow channel
- gas
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- 238000005259 measurement Methods 0.000 claims abstract description 28
- 238000005070 sampling Methods 0.000 description 21
- 210000001503 joint Anatomy 0.000 description 5
- 238000009530 blood pressure measurement Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000941 radioactive substance Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000344 soap Substances 0.000 description 1
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Classifications
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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
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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
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L13/00—Devices or apparatus for measuring differences of two or more fluid pressure values
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Fluid Mechanics (AREA)
- Measuring Volume Flow (AREA)
Abstract
The invention discloses a gas flow measuring station. The ultrasonic gas flow measuring device comprises a connector and a gas flow measuring device, wherein the gas flow measuring device comprises a gas flow channel, a gas flow stroke device communicated with the connector is arranged between the gas flow channel and the connector, and an ultrasonic gas flow velocity unit is arranged on the gas flow channel; the gas flow stroke device comprises a guide section of a cone, the large-diameter end of the guide section is positioned on the side of the connector, and the cone top of the cone is positioned on the axis of the gas flow channel and penetrates through the axis of the ultrasonic gas flow velocity unit. The invention is connected to the air outlet of the measured equipment, the gas flow stroker guides the entering gas to improve the flow velocity of the gas, and the ultrasonic measurement is realized at the tail end of the gas turbulence, and the length of the pipeline is shortened under the condition of reducing the influence of the turbulence. The quick flow acquisition in a short pipeline path is realized, and the combination of two flow devices can be realized.
Description
Technical Field
The invention belongs to a gas flow detection device, and particularly relates to a technology for measuring gas flow by using ultrasonic waves.
Background
For the measurement and calibration of the gas flow of the atmospheric sampling equipment, an electronic soap film flowmeter, an orifice flow calibrator and a pressure flow calibrator are available at present, the calibrators are all only provided with one sensor for measurement, during measurement, the measurement and calibration are carried out from the sampling orifice of the sampling equipment, and during measurement and calibration, the sampling work of the atmospheric sampling equipment needs to be interrupted. For the technology of measuring the gas flow by using ultrasonic waves, for example, the wet gas flow measuring method based on the straight-through type gas ultrasonic flowmeter in CN103353319A is widely used, and since the gas flow velocity distribution in the pipeline directly affects the measurement accuracy, the patent uses a correction coefficient to correct the flow. This patent application is only applicable to the measurement of humid media. The effect of how to reduce the gas flow velocity distribution over the structural arrangement of the conduit is not addressed in this patent. CN105486363A an ultrasonic wave gas flowmeter and measurement method improves measurement accuracy through setting up a plurality of ultrasonic waves in same one side, and this patent algorithm is comparatively complicated, does not also have from the structure setting angle consideration how to improve measurement accuracy problem simultaneously. And the structure is when the device to be inspected is connected. This patent application is only for medium transport straight through long distance pipes. For a gas sampling device, because a gas output pipeline of the gas sampling device is short, the disturbance of gas in the pipeline is large, and how to realize accurate measurement of gas flow of an atmosphere sampling device on the short pipeline is not described in relevant documents at present.
Disclosure of Invention
The invention aims to provide a device for measuring gas flow of atmospheric sampling equipment, which can realize rapid and accurate measurement of gas flow on a short transmission pipeline.
The technical scheme of the invention is as follows: the gas flow measuring device comprises a connector and a gas flow measuring device, wherein the gas flow measuring device comprises a gas flow channel, and a gas flow stroke device communicated with the gas flow channel and the connector is arranged between the gas flow channel and the connector; the ultrasonic gas flow velocity unit is arranged on the gas flow channel, the gas flow strongware comprises a guide section of a cone, the large-diameter end of the guide section is positioned on the side of the connector, and the cone top of the cone is positioned on the axis of the gas flow channel and passes through the axis of the ultrasonic gas flow velocity unit; have gaseous velocity of flow unit of ultrasonic wave to include ultrasonic transmitter and ultrasonic receiver, ultrasonic transmitter and ultrasonic receiver interval establish on gas flow channel, the contained angle theta between the axial line of ultrasonic transmitter and ultrasonic receiver and the gas flow channel axis is: theta is more than 0 degree and less than 90 degrees, and the axial connecting line of the ultrasonic transmitter and the ultrasonic receiver is positioned on the diameter surface of the gas flow channel; the distance between the intersection point (O) of the axial line of the ultrasonic transmitter and the ultrasonic receiver and the axial line of the gas flow channel and the cone top (A) of the cone is equal to the distance between the intersection point (O) and the intersection point of the ultrasonic receiver or the connection part of the ultrasonic transmitter and the pipe wall of the gas flow channel.
The invention relates to a device for sampling atmospheric gas (collecting particulate matters and radioactive substances in the atmosphere) which is connected to an air outlet of a measured device, wherein the atmospheric gas sampling device (collecting the particulate matters and the radioactive substances in the atmosphere) is integrated on a mobile device, such as a vehicle to form mobile collection. The quick collection of the flow in a short pipeline path is realized.
Further preferred technical features are: have gaseous velocity of flow unit of ultrasonic wave to include ultrasonic transmitter and ultrasonic receiver, ultrasonic transmitter and ultrasonic receiver interval establish on gas flow channel, the contained angle theta between the axial line of ultrasonic transmitter and ultrasonic receiver and the gas flow channel axis is: theta is more than 0 degree and less than 90 degrees.
Further preferred technical features are: the axial connection of the ultrasonic transmitter and the ultrasonic receiver is located on the diametric plane of the gas flow channel.
Further preferred technical features are: the distance between the intersection point O of the axial connecting line of the ultrasonic transmitter and the ultrasonic receiver and the axial line of the gas flow channel and the cone apex A of the cone is equal to the distance between the intersection point O and the intersection point of the ultrasonic receiver or the ultrasonic transmitter and the connecting part of the gas flow channel pipe wall.
Further preferred technical features are: the ultrasonic gas flow rate measuring device is characterized by further comprising a gas pressure difference module arranged in the gas flow channel, and an ultrasonic gas flow rate unit is arranged on the gas flow channel between the gas pressure difference module and the gas flow rate stroke device.
Further preferred technical features are: the gas pressure difference module is far away from the cone top A of the cone.
The invention sets two measuring devices of ultrasonic measurement and differential pressure measurement on the gas flow passage, after the invention utilizes ultrasonic wave to monitor, and then utilizes differential pressure measurement to realize the measurement of a second different mode after the gas flow is stable. The ultrasonic wave is sensitive and fast, the stroke of the pressure difference module is stable and accurate, and the two are fused, so that the measuring range is wide and the precision is high.
Further preferred technical features are: the intersection point of the connecting position of the pipe walls of the gas flow passage comprises the intersection point of the axis of the ultrasonic receiver and the inner wall of the gas flow passage pipe or the intersection point of the axis of the ultrasonic receiver and the outer wall of the gas flow passage pipe.
Further preferred technical features are: the ultrasonic generator also comprises a data processing station which is electrically connected with the ultrasonic transmitter, the ultrasonic receiver and the gas pressure difference module respectively.
Further preferred technical features are: the gas flow passage and the gas flow stroker are integral and one piece.
Further preferred technical features are: the gas flow stroke device is connected and sealed with the connector through a flange surface.
Further preferred technical features are: the outer wall of the pipe of the gas flow passage is provided with a first mounting seat and a second mounting seat; the axial connecting line of the first mounting seat and the second mounting seat is superposed with the axial connecting line of the ultrasonic receiver and the ultrasonic transmitter; the ultrasonic receiver and the ultrasonic transmitter are respectively fixed in the first mounting seat and the second mounting seat.
Further preferred technical features are: the outer wall of the pipe of the gas flow channel is provided with a third mounting seat, the axis of the third mounting seat is perpendicular to the axis of the gas flow channel, and the gas pressure difference module is fixed in the third mounting seat and extends into the gas flow channel.
The gas flow measuring station is arranged at the gas outlet end of the atmosphere sampling equipment, and the installation interface is a standard interface, so that the installation is convenient.
The gas flow measuring station is integrated, and when in measurement, the gas flow measuring station connector is connected with the gas outlet end of the sampling device, and then the connector corresponding to the sensor and the data processing station is connected with the gas outlet end of the sampling device, so that the gas flow measuring station can be operated through the digital display screen on the data processing station.
The gas flow measuring station is provided with two flow sensors of ultrasonic waves and differential pressure, the measuring mode is selected according to the flow, the two sensors can be adopted for measuring at the same time, the ultrasonic sensor or the differential pressure sensor can be selected for measuring independently, and the measured data is real and reliable.
The ultrasonic flow sensor is a non-contact sensor, is not in contact with gas, does not change the flowing state of the gas, does not generate additional resistance, is arranged at the front end of the differential pressure sensor, and does not interfere with each other during measurement.
The pressure sampling tube of the pressure difference flow sensor is high in accuracy and good in stability.
Two kinds of sensors all can adapt to multiple pipe diameter size, make the gas flow measurement station of different pipe diameters according to the sampling device of difference, and measurement accuracy does not receive the influence of pipe diameter size.
Drawings
FIG. 1 is a schematic cross-sectional view A-A of a measurement station of the present invention;
FIG. 2 is a front view of the present invention;
FIG. 3 is a right side view of the present invention;
FIG. 4 is a schematic cross-sectional view of the invention A-A.
Wherein, 1-gas flow measuring station, 2-connector, 2-1 connector connecting flange, 3-gas flow stroke device, 3-1 guiding section, 3-2 flange, 4-gas flow measurer, 4-1 gas flow channel, 5-ultrasonic gas flow rate unit, 5-1 ultrasonic transmitter, 5-2 ultrasonic receiver, 6-pressure difference module, 6-1 high-pressure signal module, 6-2 low-pressure signal module, 7-data processing station, 7-1 digital display screen, 7-2 pressure difference low-pressure signal end, 7-3 pressure difference high-pressure signal end, 7-4 ultrasonic signal receiving signal end, 7-5 ultrasonic signal transmitter signal end, 8-high-pressure signal connector, 9-low-pressure signal connector, and the like, 10-ultrasonic signal transmitter signal connector, 11-ultrasonic signal receiver signal connector, 12-first mounting seat, 13-second mounting seat and 14-third mounting seat.
Detailed Description
The following detailed description is provided for the purpose of explaining the claimed embodiments of the present invention so that those skilled in the art can understand the claims. The scope of the invention is not limited to the following specific implementation configurations. It is intended that the scope of the invention be determined by those skilled in the art from the following detailed description, which includes claims that are directed to this invention.
As shown in FIG. 1, one end of the connector 2 is provided with a connector connecting flange 2-1, and the connector connecting flange 2-1 is used for connecting an air outlet of the measured equipment. The gas flow measurer comprises a gas flow passage 4-1, a gas flow stroke device 3 is arranged at the front end of the gas flow passage 4-1 and comprises a guide section 3-1 of a cone, a connecting flange 3-2 is arranged at the large-diameter end of the guide section 3-1, and the flange 3-2 is connected and sealed with the connector 2 through bolts. The gas flow passage and the gas flow stroker are integral and one piece. An alternative solution is that the gas flow rate jumper is an integral part of the connector, which of course has the problem of the fit of the inner wall between the pilot tip and the gas flow channel.
As shown in fig. 1, 2 and 4, a first mounting seat 12 and a second mounting seat 13 are arranged on the outer wall of the pipe of the gas flow passage; the first mounting seat 12 and the second mounting seat 13 are tubular bodies, and the ultrasonic receiver 5-2, the ultrasonic transmitter 5-1, the ultrasonic receiver 5-2 and the ultrasonic transmitter 5-1 are respectively connected in the tubular bodies to form the ultrasonic gas flow velocity unit 5. Ultrasonic transmitter and ultrasonic receiver interval are established on the gas flow way, and the contained angle theta between the axial connection line of ultrasonic transmitter and ultrasonic receiver and the gas flow way axis is: theta is more than 0 degree and less than 90 degrees; this embodiment θ is 45 °.
The cone apex A of the cone apex of the cone of the guiding section 3-1 of the cone is positioned on the axis of the gas flow channel and passes through the axial connection line of the ultrasonic transmitter and the ultrasonic receiver. The axial connection of the ultrasonic transmitter and the ultrasonic receiver in this embodiment is located on the diametric plane of the gas flow channel.
The distance between the intersection point O of the axial connecting line of the ultrasonic transmitter and the ultrasonic receiver and the axial line of the gas flow channel and the cone apex A of the cone is equal to the distance between the intersection point O and the intersection point of the ultrasonic receiver or the ultrasonic transmitter and the connecting part of the gas flow channel pipe wall.
The intersection point of the connecting position of the pipe wall of the gas flow passage comprises an ultrasonic receiver, and intersection points B and C of the axis of an ultrasonic transmitter and the inner wall of the gas flow passage are formed. But may of course also be the intersection of the outer walls.
The cone top A, the intersection point O and the intersection point B of the cone at the cone vertex of the guide section 3-1 are arranged at equal intervals, on one hand, after the gas entering through the cone-shaped guide section is accelerated, turbulent flow distribution is formed in a gas flow channel and is relatively stable close to the cone top A, and on the other hand, the interference on signals of an ultrasonic receiver and an ultrasonic transmitter is small.
As shown in fig. 1, 2 and 3, the gas flow channel is provided with a third mounting seat 14 at the rear part of the ultrasonic gas flow velocity unit 5; the third mounting seat 14 is welded on the gas flow channel pipe section, the axis of the third mounting seat is perpendicular to the axis of the gas flow channel, and the gas pressure difference module 6 is fixed in the third mounting seat and extends into the gas flow channel.
The pressure difference module 6 comprises a high-pressure signal module 6-1 and a low-pressure signal module 6-2.
The data processing station 7 is respectively connected with the ultrasonic gas flow velocity unit 5 and the pressure difference module 6 through signal connectors, the data processing station 7 comprises a digital display screen 7-1, a pressure difference low-voltage signal 7-2, a pressure difference high-voltage signal 7-3, an ultrasonic signal receiving signal 7-4 and an ultrasonic signal emitter signal 7-5, the differential pressure low-voltage signal 7-2 is communicated with the low-voltage signal module 6-2 through a low-voltage signal connector 9, the differential pressure high-pressure signal 7-3 is communicated with the high-pressure signal module 6-1 through a high-pressure signal connector 8, the ultrasonic signal receiving signal 7-4 is communicated with the ultrasonic signal receiver 5-2 through an ultrasonic signal receiver signal connector 11, and the ultrasonic signal transmitter signal 7-5 is communicated with the ultrasonic signal transmitter 5-1 through an ultrasonic signal transmitter signal connector 10.
The digital display screen 7-1 is used for operation and data display during measurement.
After the connection between the measuring station and the sampling equipment is completed, the 7-1 digital display screen on the data processing station 7 is operated according to the requirement during the work measurement. The measuring station is provided with two sensors, so that the measuring range is wider, the measuring result is more accurate, and the measured data is more real and reliable.
The working principle of the invention is as follows: after the connection with the atmosphere sampling equipment is completed through the connector 2, the ultrasonic gas flow velocity unit 5 and the pressure difference module 6 are respectively in butt joint with the data processing station 7, the pressure difference low-pressure signal 7-2 is in butt joint with the low-pressure signal module 6-2 through the low-pressure signal connector 9, the pressure difference high-pressure signal 7-3 is in butt joint with the high-pressure signal connector 8, the ultrasonic signal receiving signal 7-4 is in butt joint with the ultrasonic signal receiver 5-2 through the ultrasonic signal receiver signal connector 11, and the ultrasonic signal emitter signal 7-5 is in butt joint with the ultrasonic signal emitter 5-1 through the ultrasonic signal emitter signal connector 10. After the connection is completed, the measurement station can perform measurement and calibration as shown in fig. 1.
The invention provides a gas flow measuring station of wide-range and high-precision atmospheric sampling equipment, which is used for measuring and calibrating the gas flow of the atmospheric sampling equipment, realizes the measurement and calibration of the gas flow while the sampling equipment works normally, and has real and reliable measurement data.
Claims (9)
1. A gas flow measuring station comprises a connector and a gas flow measurer, and is characterized in that the gas flow measurer comprises a gas flow channel, and a gas flow stroke device communicated with the gas flow channel and the connector is arranged between the gas flow channel and the connector; the ultrasonic gas flow velocity unit is arranged on the gas flow channel, the gas flow strongware comprises a guide section of a cone, the large-diameter end of the guide section is positioned on the side of the connector, and the cone top of the cone is positioned on the axis of the gas flow channel and passes through the axis of the ultrasonic gas flow velocity unit; have gaseous velocity of flow unit of ultrasonic wave to include ultrasonic transmitter and ultrasonic receiver, ultrasonic transmitter and ultrasonic receiver interval establish on gas flow channel, the contained angle theta between the axial line of ultrasonic transmitter and ultrasonic receiver and the gas flow channel axis is: theta is more than 0 degree and less than 90 degrees, and the axial connecting line of the ultrasonic transmitter and the ultrasonic receiver is positioned on the diameter surface of the gas flow channel; the distance between the intersection point (O) of the axial line of the ultrasonic transmitter and the ultrasonic receiver and the axial line of the gas flow channel and the cone top (A) of the cone is equal to the distance between the intersection point (O) and the intersection point of the ultrasonic receiver or the connection part of the ultrasonic transmitter and the pipe wall of the gas flow channel.
2. The gas flow measurement station of claim 1, wherein the intersection at the junction of the walls of the gas flow conduit comprises an intersection of an axis of the ultrasonic receiver with an inner wall of the gas flow conduit or an intersection of an axis of the ultrasonic receiver with an outer wall of the gas flow conduit.
3. The gas flow measuring station of claim 1, further comprising a gas pressure differential module disposed in the gas flow path, the ultrasonic gas flow rate unit disposed in the gas flow path between the gas pressure differential module and the gas flow rate stroker.
4. A gas flow measuring station according to claim 1 or 3, characterized in that the gas pressure difference module is remote from the cone apex (a) of the cone.
5. The gas flow measurement station of claim 1, further comprising a data processing station electrically connected to the ultrasonic transmitter, the ultrasonic receiver, and the differential gas pressure module, respectively.
6. The gas flow measurement station of claim 1, wherein the gas flow passage is integral with the gas flow actuator.
7. The gas flow measuring station of claim 1 or 2, wherein the gas flow sensor is sealed to the connector by a flange surface.
8. The gas flow measuring station of any of claims 1-6, wherein the outer wall of the tube of the gas flow channel is provided with a first mounting seat, a second mounting seat; the axial connecting line of the first mounting seat and the second mounting seat is superposed with the axial connecting line of the ultrasonic receiver and the ultrasonic transmitter; the ultrasonic receiver and the ultrasonic transmitter are respectively fixed in the first mounting seat and the second mounting seat.
9. The gas flow measuring station of claim 1, wherein the outer wall of the gas flow channel has a third mounting seat, the axis of the third mounting seat is perpendicular to the axis of the gas flow channel, and the differential gas pressure module is fixed in the third mounting seat and extends into the gas flow channel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011407935.3A CN112763008A (en) | 2020-12-04 | 2020-12-04 | Gas flow measuring station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011407935.3A CN112763008A (en) | 2020-12-04 | 2020-12-04 | Gas flow measuring station |
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| Publication Number | Publication Date |
|---|---|
| CN112763008A true CN112763008A (en) | 2021-05-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011407935.3A Pending CN112763008A (en) | 2020-12-04 | 2020-12-04 | Gas flow measuring station |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101576399A (en) * | 2009-05-08 | 2009-11-11 | 邓鲁坚 | Flow sensor of ultrasonic water meter and heat meter |
| CN103471670A (en) * | 2013-09-28 | 2013-12-25 | 重庆前卫科技集团有限公司 | V-shaped correlation single-pass single channel of gas flow meter |
| US20150043612A1 (en) * | 2011-11-28 | 2015-02-12 | Endress + Hauser Flowtec Ag | Method for heat quantity measurement with an ultrasonic, flow measuring device |
| CN205352483U (en) * | 2016-02-03 | 2016-06-29 | 成都顺天道环保科技有限公司 | Gaseous ultrasonic wave flow measuring device of rectification type |
| CN106768104A (en) * | 2016-12-20 | 2017-05-31 | 深圳市建恒测控股份有限公司 | A kind of ultrasonic wave mass flowmenter |
| CN107144313A (en) * | 2017-05-27 | 2017-09-08 | 京东方科技集团股份有限公司 | Flow measurement device and flow-measuring method |
| CN210293328U (en) * | 2019-05-31 | 2020-04-10 | 德闻仪器仪表(上海)有限公司 | Balanced type pipeline full-bore flowmeter |
-
2020
- 2020-12-04 CN CN202011407935.3A patent/CN112763008A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101576399A (en) * | 2009-05-08 | 2009-11-11 | 邓鲁坚 | Flow sensor of ultrasonic water meter and heat meter |
| US20150043612A1 (en) * | 2011-11-28 | 2015-02-12 | Endress + Hauser Flowtec Ag | Method for heat quantity measurement with an ultrasonic, flow measuring device |
| CN103471670A (en) * | 2013-09-28 | 2013-12-25 | 重庆前卫科技集团有限公司 | V-shaped correlation single-pass single channel of gas flow meter |
| CN205352483U (en) * | 2016-02-03 | 2016-06-29 | 成都顺天道环保科技有限公司 | Gaseous ultrasonic wave flow measuring device of rectification type |
| CN106768104A (en) * | 2016-12-20 | 2017-05-31 | 深圳市建恒测控股份有限公司 | A kind of ultrasonic wave mass flowmenter |
| CN107144313A (en) * | 2017-05-27 | 2017-09-08 | 京东方科技集团股份有限公司 | Flow measurement device and flow-measuring method |
| CN210293328U (en) * | 2019-05-31 | 2020-04-10 | 德闻仪器仪表(上海)有限公司 | Balanced type pipeline full-bore flowmeter |
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Application publication date: 20210507 |