CN203605980U - Flow measurement pipe - Google Patents
Flow measurement pipe Download PDFInfo
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- CN203605980U CN203605980U CN201320686889.4U CN201320686889U CN203605980U CN 203605980 U CN203605980 U CN 203605980U CN 201320686889 U CN201320686889 U CN 201320686889U CN 203605980 U CN203605980 U CN 203605980U
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- flow tube
- detection probe
- vortex street
- piezoelectric type
- tube according
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- 238000005259 measurement Methods 0.000 title abstract description 11
- 238000001514 detection method Methods 0.000 claims abstract description 50
- 239000000523 sample Substances 0.000 claims abstract description 42
- 239000001301 oxygen Substances 0.000 claims abstract description 15
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 15
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 14
- 238000012545 processing Methods 0.000 claims abstract description 9
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 4
- 239000007789 gas Substances 0.000 claims description 10
- 238000009434 installation Methods 0.000 claims description 10
- 238000012423 maintenance Methods 0.000 claims description 3
- 238000005070 sampling Methods 0.000 abstract 2
- 238000000034 method Methods 0.000 description 8
- ISSXKNWTCLRPJY-UHFFFAOYSA-N O.O.[O-2].[Zr+4].[O-2] Chemical compound O.O.[O-2].[Zr+4].[O-2] ISSXKNWTCLRPJY-UHFFFAOYSA-N 0.000 description 4
- 230000001052 transient effect Effects 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
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- Measuring Volume Flow (AREA)
Abstract
The utility model provides a flow measurement pipe. A piezoelectric type vortex street detection probe is adopted for the flow measurement pipe to conduct detection. The flow measurement pipe is characterized by comprising a pipe body, a vortex street generating body, the piezoelectric type vortex street detection probe, a temperature sensor, an oxygen concentration sensor, a plurality of signal collecting and processing devices and a pressure sampling hole, wherein the vortex street generating body is installed in the pipe body, the piezoelectric type vortex street detection probe is arranged on the downstream of the vortex street generating body, the temperature sensor is arranged on the downstream of the piezoelectric type vortex street detection probe, the oxygen concentration sensor is arranged on the downstream of the temperature sensor, the signal collecting and processing devices are arranged on the front side and the back side of the piezoelectric type vortex street detection probe respectively, and the pressure sampling hole is formed in the upstream of the vortex street generating body.
Description
Technical field
The utility model relates to gas flow rate analyzer, and particularly, the utility model relates to the measuring tube in traffic analyzer for automobile transient behavior method, more specifically, relates to a kind of flow tube, and this flow tube utilizes piezoelectric type vortex street detection probe to detect.
Background technology
Along with increasing sharply of China's automobile pollution, the pollution that motor vehicle causes is day by day serious, and pollution problem has become current people and has been concerned about the most and is badly in need of one of the important topic solving.The important method detecting as automobile exhaust contaminant, simple transient behavior method (VMAS method) can be added up discharge gross mass, the true emission behaviour of monitoring vehicle, equipment cost is not high, and measurement result is accurate, has become the focus of people's research.VMAS (Vehicle Mass Analysis System) detection method has good application foundation at US and European, is also applying and is promoting in China.
Gasoline vehicle simple transient worknig condition method discharge detection system be analog machine motor-car under actual condition, the detection system of instantaneous detection tailpipe emission situation, system is made up of chassis dynamometer, five gas analyzer, traffic analyzer, computer control system.Chassis dynamometer is used for analog machine motor-car and on road, travels and accelerate inertia and road running resistance transient condition, five gas analyzer is used for detecting the concentration value of CO, CO2, HC, NOX, O2 in gasoline car emission gases, and traffic analyzer is used for measuring flow, pressure, temperature, the oxygen concentration of gasoline car emission gases and surrounding air mixed gas.
Flow tube assembly is most important detection part in traffic analyzer, and the accuracy of its measurement directly affects the measurement accuracy of whole detection system.China is applied to the traffic analyzer of VMAS operating condition method detection system at present, no matter is to adopt flow tube or the flow tube of independent research of SENSORS company of the U.S. all to adopt ultrasonic detecting probe to detect.For example, as shown in Figure 1, this flow tube mainly comprises: the ultrasonic sensor that is arranged on body top, with the eddy current that is arranged on body inside, rod occurs.The major defect of this flow tube is: ultrasonic detecting probe is subject to water vapor in auto exhaust in measuring process and the impact of particle just can cause larger error, and easily breaks down, and functional reliability is poor; In the time there is more loose foul in inner-walls of duct, can there is absorption to ultrasound wave, the accuracy that impact is measured, must make regular check on and clear up.
Therefore, need to provide a kind of be not vulnerable to water vapor in exhaust and particle impact, functional reliability high, measure flow tube accurate and easy and simple to handle.
Utility model content
For overcoming above-mentioned existing defect, the utility model proposes a kind of flow tube, described flow tube utilizes piezoelectric type vortex street detection probe to detect, and it is characterized in that, and described flow detection pipe comprises: body; Vortex shedder, described vortex shedder is arranged in described body; Piezoelectric type vortex street detection probe, described piezoelectric type vortex street detecting head is arranged on the downstream of described vortex shedder; Temperature sensor, described temperature sensor is arranged on the downstream of described piezoelectric type vortex street detection probe; Oxygen concentration sensor, described oxygen concentration sensor is arranged on the downstream of described temperature sensor; Multiple signals collecting and treating apparatus, described multiple signal acquisition and processing apparatus are separately positioned on both sides, detection probe front and back; With pressure samples hole, described pressure samples hole is arranged on described vortex shedder upstream.
Preferably, described flow tube also comprises vibroshock, and described vibroshock is arranged on described body below; Preferably, the quantity of described vibroshock is 6.
Preferably, described flow tube is also provided with installation step, and described signal acquisition and processing apparatus is arranged on described installation step.
Preferably, described vortex shedder is the generation body of triangle column, and is loaded on one with body, and the leg-of-mutton broadside of described vortex shedder is inlet end, and narrow limit is outlet side.
Preferably, in the through hole Inserting Tube that described piezoelectric type vortex street detection probe is offered by body top and axially vertical, parallel with airflow direction with body, and with described vortex shedder maintenance predetermined distance.
Preferably, the installation signals collecting and the treating apparatus that are arranged on described installation step make the pressure samples hole, vortex street detection probe, temperature sensor, the oxygen concentration sensor that on described body, set gradually be connected with main control computer by signals collecting and treating apparatus.
Preferably, described pressure samples hole perforate X-over is installed above described body.
Preferably, the measuring junction of described temperature sensor inserts in described body and is axially vertical with body, and keeps enough distance with described piezoelectric type vortex street detection probe.
Preferably, described flow tube also comprises lambda sensor seat, and air chamber is arranged on described lambda sensor seat, and described air chamber is connected with described measuring tube by air intake opening and gas outlet.
Preferably, described oxygen concentration sensor is arranged at the outlet side of described measuring tube, and is fixed in the air chamber on described lambda sensor seat.
The utility model adopts piezoelectric type vortex street detection probe to detect flow, is not subject to water vapor in auto exhaust and the impact of particle, has advantages of that measuring accuracy is high, functional reliability good; Triangle column vortex shedder and detection probe are directly loaded in body, and on measuring tube, pressure transducer is set, temperature sensor, Zirconium oxide oxygen sensor and signals collecting and treating apparatus, make the structure of measuring tube compacter, simple.
By application the technical solution of the utility model, simplify design and the physical construction of circuit, reduce the cost of equipment, and be convenient to maintenance and repair.
Accompanying drawing explanation
Fig. 1 is traditional measuring tube structural representation detecting with ultrasonic detecting probe;
Fig. 2 is the flow tube one-piece construction schematic diagram detecting according to the use piezoelectric type vortex street detection probe the utility model proposes;
Fig. 3 is flow tube intermediate cam shape column vortex shedder and the concrete structure schematic diagram of piezoelectric type vortex street detection probe in pipe.
Fig. 4 is the schematic diagram of the predetermined distance that keeps between piezoelectric type vortex street detection probe in flow tube and vortex shedder.
Wherein: 1-body
2-pressure samples hole
3-vortex shedder
4-piezoelectric type vortex street detection probe
5-signals collecting and treating apparatus
6-temperature sensor
7-oxygen concentration sensor
8-lambda sensor seat
9-air intake opening
10-gas outlet
11-vibroshock
As shown in the figure, in order clearly to realize the structure of embodiment of the present utility model, specific structure and device are marked in the drawings, but this is only for signal needs, be not intended to the utility model to be limited in this ad hoc structure, device and environment, according to specific needs, those of ordinary skill in the art can adjust these devices and environment or revise, and the adjustment of carrying out or modification are still included in the scope of accompanying claim.
Embodiment
What below in conjunction with the drawings and specific embodiments, the utility model is provided is a kind ofly described in detail with the flow tube that piezoelectric type vortex street detection probe detects.
As shown in Figure 2 and Figure 3, flow measurement tubular construction of the present utility model mainly comprises body 1, vortex shedder 3, piezoelectric type vortex street detection probe 4, temperature sensor 6, oxygen concentration sensor 7, multiple signals collecting and treating apparatus 5, vibroshock 8 etc., it is characterized in that vortex shedder 3 is loaded in body 1, piezoelectric type vortex street detection probe 4 is equipped with at vortex shedder rear; Vortex shedder upstream is provided with pressure samples hole 2, and downstream is provided with temperature sensor 6, Zirconium oxide oxygen sensor 7 successively; Body is provided with the installation step for signals collecting and treating apparatus 5 are installed, and body below is provided with vibroshock 11 in order to reduce the impact of vibration on vortex street detection probe.
Vortex shedder 3 is the generation body of triangle column, is directly loaded in body.When assembling, put in pipe from pipe end, and be loaded on one at upper and lower two ends by screw and body 1, its leg-of-mutton broadside is inlet end, and narrow limit is outlet side.
Piezoelectric type vortex street detection probe 4 is arranged on the outlet side of vortex shedder 3.Multiple signal acquisition and processing apparatus 5 can be separately positioned on detection probe 4 both sides, front and back, and temperature sensor 6, Zirconium oxide oxygen sensor 7 are positioned at the downstream of piezoelectric type vortex street detection probe 4 successively.Here, as shown in Figure 2, the quantity of signal acquisition and processing apparatus is two, but the present invention is not limited to this, can adjust as required the quantity of signal acquisition and processing apparatus.
In the through hole Inserting Tube that piezoelectric type vortex street detection probe 4 is offered by body 1 top and axially vertical, parallel with airflow direction with body, and keep predetermined distance with vortex shedder 3.Here, predetermined distance refers to the center of detection probe 4 and the preferred distance that occurs between body 3 front ends is (1-1.5) d, the diameter that d is detection probe, as shown in Figure 4.
Oxygen concentration sensor can be Zirconium oxide oxygen sensor 7, and it is arranged on the outlet side of measuring tube, and is fixed in the air chamber on lambda sensor seat 8, and air chamber communicates with measuring tube with gas outlet 10 by air intake opening 9.
The body 1 of flow tube is provided with installation step for signals collecting and treating apparatus 5 are installed, pressure samples hole 2, vortex street detection probe 4, temperature sensor 6, the oxygen concentration sensor 7 being convenient to set gradually on body are connected with main control computer by signals collecting and treating apparatus 5, make structure more compact.
6 vibroshocks 8 are equipped with by screw in body 1 below, to reduce the impact of vibration on vortex street detection probe, make measurement result more accurate.Certainly, the present invention is not limited to this, and the quantity of vibroshock can increase as required or reduce.
Finally it should be noted that, above embodiment is only in order to describe the technical solution of the utility model rather than this technical method is limited, the utility model can extend to other modification, variation, application and embodiment in application, and therefore thinks that all such modifications, variation, application, embodiment are in spirit of the present utility model with instruct in scope.
Claims (10)
1. a flow tube, described flow detection pipe utilizes piezoelectric type vortex street detection probe to detect, and it is characterized in that, and described flow detection pipe comprises:
Body;
Vortex shedder, described vortex shedder is arranged in described body;
Piezoelectric type vortex street detection probe, described piezoelectric type vortex street detecting head is arranged on the downstream of described vortex shedder;
Temperature sensor, described temperature sensor is arranged on the downstream of described piezoelectric type vortex street detection probe;
Oxygen concentration sensor, described oxygen concentration sensor is arranged on the downstream of described temperature sensor;
Multiple signals collecting and treating apparatus, described multiple signal acquisition and processing apparatus are separately positioned on both sides, detection probe front and back; With
Pressure samples hole, described pressure samples hole is arranged on described vortex shedder upstream.
2. flow tube according to claim 1, is characterized in that, described flow tube also comprises vibroshock, and described vibroshock is arranged on described body below; Preferably, the quantity of described vibroshock is 6.
3. flow tube according to claim 1, is characterized in that, described flow tube is also provided with installation step, and described signal acquisition and processing apparatus is arranged on described installation step.
4. flow tube according to claim 1, is characterized in that, described vortex shedder is the generation body of triangle column, and is loaded on one with body, and the leg-of-mutton broadside of described vortex shedder is inlet end, and narrow limit is outlet side.
5. flow tube according to claim 1, it is characterized in that, in the through hole Inserting Tube that described piezoelectric type vortex street detection probe is offered by body top and axially vertical, parallel with airflow direction with body, and with described vortex shedder maintenance predetermined distance.
6. flow tube according to claim 3, it is characterized in that, the installation signals collecting and the treating apparatus that are arranged on described installation step make the pressure samples hole, vortex street detection probe, temperature sensor, the oxygen concentration sensor that on described body, set gradually be connected with main control computer by signals collecting and treating apparatus.
7. flow tube according to claim 1, is characterized in that, the perforate X-over is installed above described body of described pressure samples hole.
8. flow tube according to claim 1, is characterized in that, the measuring junction of described temperature sensor inserts in described body and be axially vertical with body, and keeps enough distance with described piezoelectric type vortex street detection probe.
9. flow tube according to claim 1, is characterized in that, described flow tube also comprises lambda sensor seat, and air chamber is arranged on described lambda sensor seat, and described air chamber is connected with described measuring tube by air intake opening and gas outlet.
10. flow tube according to claim 9, is characterized in that, described oxygen concentration sensor is arranged at the outlet side of described measuring tube, and is fixed in the air chamber on described lambda sensor seat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320686889.4U CN203605980U (en) | 2013-10-31 | 2013-10-31 | Flow measurement pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320686889.4U CN203605980U (en) | 2013-10-31 | 2013-10-31 | Flow measurement pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203605980U true CN203605980U (en) | 2014-05-21 |
Family
ID=50718646
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320686889.4U Expired - Lifetime CN203605980U (en) | 2013-10-31 | 2013-10-31 | Flow measurement pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203605980U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104034372A (en) * | 2014-06-12 | 2014-09-10 | 杭州冠一流体技术有限公司 | Density correction type multi-parameter flowmeter and density correction method |
| CN113155208A (en) * | 2021-05-25 | 2021-07-23 | 中国航发四川燃气涡轮研究院 | Gas flow detection device suitable for turbine blade |
-
2013
- 2013-10-31 CN CN201320686889.4U patent/CN203605980U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104034372A (en) * | 2014-06-12 | 2014-09-10 | 杭州冠一流体技术有限公司 | Density correction type multi-parameter flowmeter and density correction method |
| CN113155208A (en) * | 2021-05-25 | 2021-07-23 | 中国航发四川燃气涡轮研究院 | Gas flow detection device suitable for turbine blade |
| CN113155208B (en) * | 2021-05-25 | 2021-10-12 | 中国航发四川燃气涡轮研究院 | Gas flow detection device suitable for turbine blade |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140521 |
|
| CX01 | Expiry of patent term |