CN2516944Y - Flow measuring device with Pitot tube - Google Patents
Flow measuring device with Pitot tube Download PDFInfo
- Publication number
- CN2516944Y CN2516944Y CN 01277912 CN01277912U CN2516944Y CN 2516944 Y CN2516944 Y CN 2516944Y CN 01277912 CN01277912 CN 01277912 CN 01277912 U CN01277912 U CN 01277912U CN 2516944 Y CN2516944 Y CN 2516944Y
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- CN
- China
- Prior art keywords
- pitot tube
- valve
- pressure sensor
- piezometric
- pipeline
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- Expired - Lifetime
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Abstract
The utility model provides an improved flow velocity measuring unit with a pitot tube, comprising a pitot tube, a compressed air pipeline, a plurality of two-way valves, two triple valves, a micro-differential pressure sensor and a signal processing circuit, which is characterized in that the main compressed air pipeline is separated into two branch pipelines which are connected with a positive and a negative piezometric tubes of the pitot tube via the two-way valves respectively, the first end of one triple valve is communicated with the positive piezometric opening of the micro-differential pressure sensor via the pipeline, the second end of the triple valve is connected with the positive piezometric tube of the pitot tube via the pipeline, the third end of the triple valve is communicated with the atmosphere, the first end of the other triple valve is communicated with the negative piezometric opening of the micro-differential pressure sensor via the pipeline, the second end of the triple valve is connected with the negative piezometric tube of the pitot tube via the pipeline and the third end of the triple valve is communicated with the atmosphere. The utility model has the advantages of achieving respective sweeping of the positive and the negative piezometric tubes of the pitot tube, improving sweeping effect greatly, realizing the function of automatic zero adjustment of the micro-differential pressure sensor and the insolated protection of the micro-differential pressure sensor and the high-pressure compressed air while in sweeping.
Description
Technical field
The utility model belongs to the gas flow detecting instrument, is a kind of Pitot Tube Flow Velocity Measuring Apparatus that is used at the gas exhaust duct continuous coverage exhaust flow velocity that contains dust specifically.
Background technology
Pitot Tube Flow Velocity Measuring Apparatus influences measurement accuracy because of dust can accumulate on the pitot tube measuring junction in use for some time, so need regularly purge, removes dust.There are the following problems for existing blow device: when 1, purging, it is the positive and negative piezometric tube that pressurized air is added to simultaneously pitot tube by a two-way valve control, after the piezometric tube of an end stops up fully, pressurized air then flows to another little piezometric tube of resistance, has reduced the purging effect of the piezometric tube that stops up a serious end; 2, the automatic zero point that can not realize little differential pressure sensor is adjusted function; 3, the insulation blocking of little differential pressure sensor and high pressure air in the time of can not realizing purging.
Summary of the invention
The purpose of this utility model is at the deficiencies in the prior art, and a kind of improved Pitot Tube Flow Velocity Measuring Apparatus is provided.Can realize the purging respectively of the positive and negative piezometric tube of pitot tube, improve the effect that purges greatly; Also can realize the automatic zero point adjustment of little differential pressure sensor and the insulation blocking function of little differential pressure sensor and high pressure air when purging.
The technical solution of the utility model is: a kind of Pitot Tube Flow Velocity Measuring Apparatus, comprise pitot tube, compressed air line, two-way valve, T-valve, little differential pressure sensor and signal processing circuit thereof, it is characterized in that the described pressurized air main line that links to each other with compressor is divided into the two-way bye-pass, one bye-pass is connected with the positive piezometric tube of pitot tube by a two-way valve, and another bye-pass is connected by the negative piezometric tube of a two-way valve and pitot tube.Can realize the purging respectively of the positive and negative piezometric tube of pitot tube, improve the effect that purges greatly.
Described T-valve has two, and one of them T-valve one port is connected by the positive pressure tap of pipeline and little differential pressure sensor, and a port is connected by the positive piezometric tube of pipeline and pitot tube, also has a port to be communicated with atmosphere; Another T-valve one port is connected by the negative pressure tap of pipeline and little differential pressure sensor, and a port is connected by the negative piezometric tube of pipeline and pitot tube, also has a port to be communicated with atmosphere.
Described T-valve is a two position three-way valve, and described two-way valve is two two-way valves.
The utility model compared with prior art has many advantages and good effect:
1, because, the pressurized air main line that links to each other with compressor is divided into the two-way bye-pass, one road bye-pass is connected with the positive piezometric tube of pitot tube by a two-way valve, another road bye-pass passes through a two-way valve and pitot tube and bears piezometric tube and be connected.Two two-way valves can be controlled respectively, realize the purging respectively of the positive and negative piezometric tube of pitot tube, have improved the effect that purges greatly;
2, the positive and negative pressure tap of little differential pressure sensor can be communicated with ambient atmosphere simultaneously, can carry out automatic zero point by circuit or microcomputer this moment and revise, eliminate because the measuring error that the sensor zero point drift brings.
3, the insulation blocking of little differential pressure sensor and high pressure air in the time of can realizing purging.
Description of drawings
Fig. 1 is the utility model Pitot Tube Flow Velocity Measuring Apparatus johning knot composition.
Embodiment
Referring to Fig. 1, a kind of Pitot Tube Flow Velocity Measuring Apparatus, the pressurized air main line 9 that links to each other with compressor is divided into the two-way bye-pass, and a bye-pass is connected with the positive piezometric tube 7 of pitot tube by a two-way valve 5, and another bye-pass is connected by the negative piezometric tube 8 of a two-way valve 6 and pitot tube.Also have two T-valve 1,3, the port a of one of them T-valve 1 connects by the positive pressure tap of pipeline and little differential pressure sensor 2, and port b is connected by the positive piezometric tube 7 of pipeline and pitot tube, and also ports having c is communicated with atmosphere; The port a of another T-valve 3 connects by the negative pressure tap of pipeline and little differential pressure sensor 2, and port b is connected by the negative piezometric tube 8 of pipeline and pitot tube, and also ports having c is communicated with atmosphere.Little differential pressure sensor 2 by circuit be connected signal processing circuit 4.
Normal flow is measured state: two- way valve 5,6, and T-valve 1,3 is not all worked, and the positive piezometric tube 7 of pitot tube links to each other with little differential pressure sensor 2 positive pressure tap with a end by T-valve b end; The negative piezometric tube 8 of pitot tube links to each other with little differential pressure sensor 2 negative pressure tap with a end by the b end of T-valve 3, and system is in normal measurement state.
Micro-pressure sensor is adjusted state zero point: T-valve 1, T-valve 3 are worked, and little differential pressure sensor 2 positive pressure tap communicate with atmosphere by a end and the c end of T-valve 1; Little differential pressure sensor 2 negative pressure tap communicate with atmosphere by a end and the c end of T-valve 3; Be that micro-pressure sensor 2 positive and negative pressure tap all insert ambient atmosphere, be in the zero-bit state.This moment can be by revising with 4 pairs of sensor zero point drifts of signal processing circuit of micro-pressure sensor 2.
The realization that the positive piezometric tube of pitot tube purges: T-valve 1, T-valve 3 work, little differential pressure sensor 2 positive pressure tap communicate with atmosphere by a end and the c end of T-valve 1; Little differential pressure sensor 2 negative pressure tap communicate with atmosphere by a end and the c end of T-valve 3; Be that micro-pressure sensor 2 positive and negative pressure tap all insert ambient atmosphere.Two-way valve 5 work, pressurized air purges the positive piezometric tube 7 of pitot tube through two-way valve 5, and after the purging stipulated time, two-way valve 5 quits work.T-valve 1, T-valve 3 quits work, and system enters normal pressure measurement state.
The realization that the negative piezometric tube of pitot tube purges: T-valve 1, T-valve 3 work, little differential pressure sensor 2 positive pressure tap communicate with atmosphere by a end and the c end of T-valve 1; Little differential pressure sensor 2 negative pressure tap communicate with atmosphere by a end and the c end of T-valve 3; Be that micro-pressure sensor 2 positive and negative pressure tap all insert ambient atmosphere.Two-way valve 6 work, pressurized air purge the negative piezometric tube 8 of pitot tube through two-way valve 6, and after the purging stipulated time, two-way valve 6 quits work.T-valve 1, T-valve 3 quit work, and system enters normal pressure measurement state.
Above-mentioned T-valve 1,3 is two position three-way valve, and two- way valve 5,6 is two two-way valves.
Claims (3)
1, a kind of Pitot Tube Flow Velocity Measuring Apparatus, comprise pitot tube, compressed air line, two-way valve, T-valve, little differential pressure sensor and signal processing circuit thereof, it is characterized in that the described pressurized air main line that links to each other with compressor is divided into the two-way bye-pass, one bye-pass is connected with the positive piezometric tube of pitot tube by a two-way valve, and another bye-pass is connected by the negative piezometric tube of a two-way valve and pitot tube.
2, according to the described Pitot Tube Flow Velocity Measuring Apparatus of claim 1, it is characterized in that described T-valve has two, one of them T-valve one port is connected by the positive pressure tap of pipeline and little differential pressure sensor, one port is connected by the positive piezometric tube of pipeline and pitot tube, also has a port to be communicated with atmosphere; Another T-valve one port is connected by the negative pressure tap of pipeline and little differential pressure sensor, and a port is connected by the negative piezometric tube of pipeline and pitot tube, also has a port to be communicated with atmosphere.
3, according to claim 1 or 2 described Pitot Tube Flow Velocity Measuring Apparatus, it is characterized in that described T-valve is a two position three-way valve, described two-way valve is two two-way valves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01277912 CN2516944Y (en) | 2001-12-25 | 2001-12-25 | Flow measuring device with Pitot tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01277912 CN2516944Y (en) | 2001-12-25 | 2001-12-25 | Flow measuring device with Pitot tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2516944Y true CN2516944Y (en) | 2002-10-16 |
Family
ID=33681538
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01277912 Expired - Lifetime CN2516944Y (en) | 2001-12-25 | 2001-12-25 | Flow measuring device with Pitot tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2516944Y (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102506954A (en) * | 2011-12-01 | 2012-06-20 | 于邦仲 | Water removal system of flow sensor |
| CN102830244A (en) * | 2012-09-07 | 2012-12-19 | 北京雪迪龙科技股份有限公司 | Flow velocity measuring device with pitot tube |
| CN103399171A (en) * | 2013-08-16 | 2013-11-20 | 中煤科工集团重庆研究院 | Detecting device and method for bi-directionally measuring wind speed and wind direction |
| CN103398733A (en) * | 2013-08-16 | 2013-11-20 | 中煤科工集团重庆研究院 | Anti-blocking pressure guidance probe of wind speed and wind direction detection device |
| CN103399170A (en) * | 2013-08-16 | 2013-11-20 | 中煤科工集团重庆研究院 | Automatic reset differential pressure module and method for measuring wind speed and wind direction |
| CN104596747A (en) * | 2014-12-26 | 2015-05-06 | 舟山市恒威船舶配件有限公司 | Vacuum flux test device of air pipe head |
| CN105181292A (en) * | 2015-09-25 | 2015-12-23 | 中国航空工业集团公司哈尔滨空气动力研究所 | Multi-measuring range pressure measurement device with purging function |
| CN109738665A (en) * | 2019-01-19 | 2019-05-10 | 重庆芯力源科技有限公司 | A kind of flow velocity method for automatic measurement based on Pitot tube |
-
2001
- 2001-12-25 CN CN 01277912 patent/CN2516944Y/en not_active Expired - Lifetime
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102506954A (en) * | 2011-12-01 | 2012-06-20 | 于邦仲 | Water removal system of flow sensor |
| CN102830244A (en) * | 2012-09-07 | 2012-12-19 | 北京雪迪龙科技股份有限公司 | Flow velocity measuring device with pitot tube |
| CN102830244B (en) * | 2012-09-07 | 2014-05-28 | 北京雪迪龙科技股份有限公司 | Flow velocity measuring device with pitot tube |
| CN103399171A (en) * | 2013-08-16 | 2013-11-20 | 中煤科工集团重庆研究院 | Detecting device and method for bi-directionally measuring wind speed and wind direction |
| CN103398733A (en) * | 2013-08-16 | 2013-11-20 | 中煤科工集团重庆研究院 | Anti-blocking pressure guidance probe of wind speed and wind direction detection device |
| CN103399170A (en) * | 2013-08-16 | 2013-11-20 | 中煤科工集团重庆研究院 | Automatic reset differential pressure module and method for measuring wind speed and wind direction |
| CN103398733B (en) * | 2013-08-16 | 2016-01-13 | 中煤科工集团重庆研究院有限公司 | The anti-blocking impulse probe of wind speed, wind direction pick-up unit |
| CN104596747A (en) * | 2014-12-26 | 2015-05-06 | 舟山市恒威船舶配件有限公司 | Vacuum flux test device of air pipe head |
| CN105181292A (en) * | 2015-09-25 | 2015-12-23 | 中国航空工业集团公司哈尔滨空气动力研究所 | Multi-measuring range pressure measurement device with purging function |
| CN109738665A (en) * | 2019-01-19 | 2019-05-10 | 重庆芯力源科技有限公司 | A kind of flow velocity method for automatic measurement based on Pitot tube |
| CN109738665B (en) * | 2019-01-19 | 2020-12-01 | 重庆芯力源科技有限公司 | Pitot tube-based flow velocity automatic measurement method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Qindao Laoshan Applied Technology Research Institute Assignor: Liang Yong Contract fulfillment period: 2006.1.26 to 2011.12.24 Contract record no.: 2008370000158 Denomination of utility model: Flow measuring device with Pitot tube Granted publication date: 20021016 License type: Exclusive license Record date: 20081204 |
|
| LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2006.1.26 TO 2011.12.24; CHANGE OF CONTRACT Name of requester: QINGDAO LAOSHAN APPLICATION TECHNOLOGY RESEARCH IN Effective date: 20081204 |
|
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20111225 Granted publication date: 20021016 |