CN201242456Y - Combined device for measurement of gas flow based on Vortex Street, equal speed tube and bypass pipe - Google Patents
Combined device for measurement of gas flow based on Vortex Street, equal speed tube and bypass pipe Download PDFInfo
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- CN201242456Y CN201242456Y CNU2008201623090U CN200820162309U CN201242456Y CN 201242456 Y CN201242456 Y CN 201242456Y CN U2008201623090 U CNU2008201623090 U CN U2008201623090U CN 200820162309 U CN200820162309 U CN 200820162309U CN 201242456 Y CN201242456 Y CN 201242456Y
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- gas flow
- vortex street
- shunt valve
- speed tube
- bypass pipe
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- 238000012360 testing method Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
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- 238000004458 analytical method Methods 0.000 description 1
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- 238000005516 engineering process Methods 0.000 description 1
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Abstract
The utility model discloses a gas flow combined measuring device based on a vortex street, a velocity averaging tube and a bypass pipe. The bypass pipe is in parallel connection with the vortex street type gas flow meter provided with a temperature sensor and a pressure sensor, a MEMS flow sensor is arranged on the bypass pipe, the inlet of the bypass pipe is connected with the velocity averaging tube arranged on the eddy generator of the vortex street type gas flow meter, a total pressure hole is arranged on the velocity averaging tube, the outlet of the bypass pipe is positioned at the downstream side of the gas flow of the vortex street frequency detector of the vortex street type gas flow meter, the temperature sensor, the pressure sensor, the vortex street frequency detector and the MEMS flow sensor are all connected with a data processing system, and the data processing system is connected with a data display system. The utility model effectively solves the problems in the prior gas flow measuring device that the measuring range is narrow, the measuring precision is low and the reliability is poor. The gas flow combined measuring device has simple structure and low cost, and is applicable to the popularization and use in relevant industries.
Description
Technical field
The utility model relates to the gas flow measurement field, relates to especially that a kind of range ratio is wide, measuring accuracy is high, the gas flow combination metering device based on vortex street, even speed tube, shunt valve of good reliability.
Background technology
As everyone knows, method in order to the measurement gas flow has a variety of now, corresponding testing device is also varied, but every kind of device all has the limitation of its test, such as the stable performance under the bigger situation of gas flow rate of mechanical type gas flow measurement device, measuring accuracy is also than higher, but mechanical type gas flow measurement device is bigger at the less time error of gas flow rate, for example the gas flow measurement device of eddy currents almost can't be measured during less than 5 metre per second (m/s)s accurately at gas flow rate, and the heat type gas flow measurement mechanism is adapted at gas flow rate measurement hour, and its error is bigger when gas flow rate is big.Therefore, single gas flow measurement device difficulty accomplish that wide-range is than, high-precision measurement.Open day for January 31 calendar year 2001, publication number are that the patent document of CN1282417 discloses a kind of flowmeter that can accurately measure flow on wide flow range, and it is low discharge to be set with measured zone and flow measured zone greatly in the stream of pipe arrangement.With in the measured zone, the rectification filtrator that stream is divided into a plurality of little streams and the stream of gas is carried out rectification is set at low discharge.Each mean flow rate of gas that flows through a plurality of little streams respectively is equal substantially.The part of gas arrives at the nozzle of low discharge with the vertical setting in both sides of flow sensor, quickens by means of the effect of this nozzle.The low discharge low discharge flow sensor of measured zone, on the low discharge section, output with by little stream and by the corresponding signal of flow velocity of the gas after the nozzle acceleration, the big flow big flow flow sensor of measured zone, on a large amount of sections, export the signal corresponding with the flow velocity of gas.Though said apparatus has been expanded range ratio to a certain extent, has improved measuring accuracy, this apparatus structure is comparatively complicated, and cost of manufacture is higher, and simultaneously, this installs in actual applications, and the influence of change of flow state also is difficult to eliminate fully.
The utility model content
The utility model provides a kind of range ratio the gas flow combination metering device based on vortex street, even speed tube, shunt valve wide, applied widely for the range ratio problem narrow, that the scope of application is little that solves present gas flow measurement device existence.
Another purpose of the present utility model is the gas flow combination metering device based on vortex street, even speed tube, shunt valve that a kind of measuring accuracy height, good reliability are provided for the measuring accuracy problem low, poor reliability that solves present gas flow measurement device existence.
The utility model is to reach the concrete technical scheme that above-mentioned technical purpose adopts to be: a kind of based on vortex street, even speed tube, the gas flow combination metering device of shunt valve, it is characterized in that: on the eddy currents gas meter of band temperature sensor and pressure transducer and connect shunt valve, shunt valve is provided with the MEMS flow sensor, the even speed tube that is provided with on the import of shunt valve and the eddy currents gas meter vortex generation body links to each other, even speed tube is provided with total pressure tapping, the outlet of shunt valve is positioned at the airflow downstream side of eddy currents gas meter vortex street frequency detector, temperature sensor, pressure transducer, vortex street frequency detector and MEMS flow sensor all connect data handling system, and data handling system connects data presentation system.On the eddy currents gas meter and connect shunt valve, the MEMS flow sensor is set on the shunt valve, and set up the even speed tube total pressure tapping at the entrance point of shunt valve, pass through vortex street, even speed tube, the mutual supplement with each other's advantages of three kinds of flow-measuring methods of shunt valve, will be when big flow velocity the higher eddy currents gas meter of stability and accuracy organically combine with the MEMS flow sensor that when measuring minimum velocity, has clear superiority, utilize the mean flow rate in cross section in the even speed tube measuring tube simultaneously, be not subjected to the advantage of fluidised form distortion effects, thereby realize wide-range gas flow, high-acruracy survey.And all data that system surveyed, all handle by data handling system, at last in data presentation system demonstration place measurement data, like this, not only effectively broadening the range ratio of gas flow combination metering device, and data handling system is in data handling procedure, can carry out overall treatment to the data of surveying of eddy currents gas meter and MEMS flow sensor, thereby also improved the measuring accuracy of gas flow, in addition, because eddy currents gas meter and MEMS flow sensor are worked simultaneously, have improved the reliability of whole combination metering device greatly.
As preferably, the internal diameter of shunt valve is 2 to 10 millimeters.Shunt valve is to utilize the pressure reduction of trunk line gas inlet and outlet to carry out gas flow measurement, therefore, the import of shunt valve is positioned at the air-flow upstream side of eddy currents gas meter, and the outlet of shunt valve is positioned at the airflow downstream side of eddy currents gas meter vortex street frequency detector.For the bigger trunk line of diameter, can adopt the relatively large shunt valve of internal diameter, and for the less trunk line of diameter, then should adopt the less relatively shunt valve of internal diameter, thereby make the cross-sectional area of shunt valve be far smaller than trunk line, it is exerted an influence hardly to the eddy currents gas meter on the trunk line.
As preferably, even speed tube and vortex generation body are integrated.Vortex generation body at the eddy currents gas meter is provided with the even speed tube total pressure tapping, and the one, can avoid the interference of the even speed tube that is provided with separately to the eddy currents gas meter, influence measuring accuracy, the 2nd, structure that can the simplified measurement device reduces cost.
The beneficial effects of the utility model are: it is narrow that it solves the range ratio of present gas flow measurement device existence effectively, scope of application minor issue.Simultaneously, the measuring accuracy that has also solved present gas flow measurement device existence is low, the problem of poor reliability, and the utility model is simple in structure, cost is low, and worth relevant industries are promoted the use of.
Description of drawings
Fig. 1 is a kind of structural representation of a kind of gas flow combination metering device based on vortex street, even speed tube, shunt valve of the utility model.
Embodiment
Below by embodiment, and in conjunction with the accompanying drawings the embodiment of technical solutions of the utility model is further described.
Embodiment 1
In embodiment 1 as shown in Figure 1, a kind of based on vortex street, even speed tube, the gas flow combination metering device of shunt valve is on the eddy currents gas meter 1 of band temperature sensor 9 and pressure transducer 2 and connects shunt valve 8, the internal diameter of shunt valve 8 is 5 millimeters, shunt valve 8 is provided with MEMS flow sensor 7, the even speed tube 13 that is provided with on the import 4 of shunt valve 8 and the eddy currents gas meter vortex generation body 4 links to each other, even speed tube 13 is integrated with vortex generation body 4, even speed tube 13 is provided with total pressure tapping 14, the outlet 10 of shunt valve 8 is positioned at the airflow downstream side of eddy currents gas meter vortex street frequency detector 11, temperature sensor 9, pressure transducer 2, vortex street frequency detector 11 and MEMS flow sensor 7 all connect data handling system 6, data handling system 6 connects data presentation system 5, also be provided with IO interface 3 on the data handling system 6, whole gas flow combination metering device adopts the power source special power supply.
Based on vortex street, even speed tube, when the gas flow combination metering device of shunt valve uses, the flow through eddy currents gas meter of trunk line of the overwhelming majority of tested gas, a spot of gas enters the shunt valve of flowing through by the even speed tube total pressure tapping, the data based trunk line pressure that records synchronously of eddy currents gas meter institute measurement of discharge of trunk line and temperature data carry out being converted to after temperature and pressure compensation is handled mark condition volume data by data handling system, the a small amount of gas of shunt valve of flowing through then carries out another drive test amount of gas flow by the MEMS flow sensor, the measurement data of MEMS flow sensor can directly be demarcated and is mark condition volume data, thereby make the two-way gas flow measurement all realize the side's of marking measurement, two kinds of metering systems are organically combined.Data handling system is carried out comprehensive analysis processing according to the measuring characteristic of two-way measurement mechanism under different in flow rate to its data of surveying, and demonstrates final gas flow data by display system.Gas flow rate hour, data with the MEMS flow sensor are as the criterion, when gas flow rate is big, data with the eddy currents gas meter are as the criterion, take into account the range lap of MEMS flow sensor at the eddy currents gas flow, the data of the eddy currents gas flow being taken into account the MEMS flow sensor according to the size of gas flow rate are carried out addition after the weighting in proportion and are handled.Thereby realized the mark condition flow measurement of wide-range ratio, high precision, high reliability, it meets the development trend of modern gas flow mass metrology requirement.
Claims (3)
1. one kind based on vortex street, even speed tube, the gas flow combination metering device of shunt valve, it is characterized in that: go up and connect shunt valve (8) at the band temperature sensor (9) and the eddy currents gas meter (1) of pressure transducer (2), shunt valve (8) is provided with MEMS flow sensor (7), the import (4) of shunt valve (8) is gone up the even speed tube (13) that is provided with eddy currents gas meter vortex generation body (12) and is linked to each other, even speed tube (13) is provided with total pressure tapping (14), the outlet (10) of shunt valve (8) is positioned at the airflow downstream side of eddy currents gas meter vortex street frequency detector (11), temperature sensor (9), pressure transducer (2), vortex street frequency detector (11) and MEMS flow sensor (7) all connect data handling system (6), and data handling system (6) connects data presentation system (5).
2. the gas flow combination metering device based on vortex street, even speed tube, shunt valve according to claim 1, the internal diameter that it is characterized in that shunt valve (8) are 2 to 10 millimeters.
3. the gas flow combination metering device based on vortex street, even speed tube, shunt valve according to claim 1 and 2 is characterized in that even speed tube (13) and vortex generation body (12) are integrated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201623090U CN201242456Y (en) | 2008-08-08 | 2008-08-08 | Combined device for measurement of gas flow based on Vortex Street, equal speed tube and bypass pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201623090U CN201242456Y (en) | 2008-08-08 | 2008-08-08 | Combined device for measurement of gas flow based on Vortex Street, equal speed tube and bypass pipe |
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| Publication Number | Publication Date |
|---|---|
| CN201242456Y true CN201242456Y (en) | 2009-05-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201623090U Expired - Lifetime CN201242456Y (en) | 2008-08-08 | 2008-08-08 | Combined device for measurement of gas flow based on Vortex Street, equal speed tube and bypass pipe |
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| CN (1) | CN201242456Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102494742A (en) * | 2011-12-02 | 2012-06-13 | 北京航空航天大学 | Method for on-line calibration of large-caliber flow meter |
| CN102645248A (en) * | 2012-05-18 | 2012-08-22 | 中国计量学院 | Self-correction heat type-precession vortex combined type gas flow measurement method |
| CN106123982A (en) * | 2016-06-14 | 2016-11-16 | 广州市唯量工控技术有限公司 | A kind of micro-precision electronic type mass-flow gas meter |
| CN112390221A (en) * | 2020-12-14 | 2021-02-23 | 郑州市广正电子有限公司 | Oil gas recovery online detection embedded integrated pressure compensation vortex shedding flowmeter of oiling machine |
-
2008
- 2008-08-08 CN CNU2008201623090U patent/CN201242456Y/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102494742A (en) * | 2011-12-02 | 2012-06-13 | 北京航空航天大学 | Method for on-line calibration of large-caliber flow meter |
| CN102494742B (en) * | 2011-12-02 | 2013-10-30 | 北京航空航天大学 | Method for on-line calibration of large-caliber flow meter |
| CN102645248A (en) * | 2012-05-18 | 2012-08-22 | 中国计量学院 | Self-correction heat type-precession vortex combined type gas flow measurement method |
| CN102645248B (en) * | 2012-05-18 | 2013-10-02 | 中国计量学院 | Self-correction heat type-precession vortex combined type gas flow measurement method |
| CN106123982A (en) * | 2016-06-14 | 2016-11-16 | 广州市唯量工控技术有限公司 | A kind of micro-precision electronic type mass-flow gas meter |
| CN112390221A (en) * | 2020-12-14 | 2021-02-23 | 郑州市广正电子有限公司 | Oil gas recovery online detection embedded integrated pressure compensation vortex shedding flowmeter of oiling machine |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170407 Address after: Xishan Economic Development Zone 214101 Jiangsu city of Wuxi province (East) Dacheng Road, Anderson Road East Patentee after: Memsic Transducer Systems Co., Ltd. Patentee after: Hefei Jingda Instrument Co., Ltd. Address before: 214028 Wuxi province high tech Industrial Development Zone, Hui Hui Road, No. 2, No. Patentee before: Meixin Semi-conductor (Wuxi) Co., Ltd. Patentee before: Hefei Jingda Instrument Co., Ltd. |
|
| TR01 | Transfer of patent right | ||
| CP03 | Change of name, title or address |
Address after: 214000 Jiangsu city of Wuxi province Quxin Wu Hui new Ring Road No. 2 Co-patentee after: Hefei Jingda Instrument Co., Ltd. Patentee after: New sensing system Co., Ltd. Address before: Xishan Economic Development Zone 214101 Jiangsu city of Wuxi province (East) Dacheng Road, Anderson Road East Co-patentee before: Hefei Jingda Instrument Co., Ltd. Patentee before: Memsic Transducer Systems Co., Ltd. |
|
| CP03 | Change of name, title or address | ||
| CX01 | Expiry of patent term |
Granted publication date: 20090520 |
|
| CX01 | Expiry of patent term |