CN2399729Y - Anti-sand wind speed profile pitot tube - Google Patents
Anti-sand wind speed profile pitot tube Download PDFInfo
- Publication number
- CN2399729Y CN2399729Y CN 99254581 CN99254581U CN2399729Y CN 2399729 Y CN2399729 Y CN 2399729Y CN 99254581 CN99254581 CN 99254581 CN 99254581 U CN99254581 U CN 99254581U CN 2399729 Y CN2399729 Y CN 2399729Y
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- pressure tube
- tube
- static pressure
- wind
- speed
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- Expired - Fee Related
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Abstract
The utility model provides an anti-sand wind speed profile pitot tube, belonging to the vertical distribution apparatus for airflow speed. The utility model is composed of a plurality of probes, an ellipsoidal head, a horizontal-vertical total pressure tube and a static pressure tube, wherein, the total pressure tube and the static pressure tube form two concentric circular tubes and are fixedly connected with the place of an interface. The utility model is characterized in that the windward surface of the total pressure tube is provided with an opening; the place of the static pressure tube at certain distance of the horizontal terminal end of the static pressure tube is provided with a plurality of holes which pass through the tube wall of the static pressure tube; an annular space between the two tubes on the front end facing wind is closed; a plurality of probes have different heights, and the probes, the total pressure tube and the static pressure tube are arranged in a protecting box in sequence. The flow speed is used as a parameter in a plurality of subject fields; during the process of wind tunnel measurement and field measurement, the utility model utilizing a micro differential pressure meter can measure the magnitude of differential pressure of a wind-speed flow field through the value of the differential pressure between the total pressure tube and the static pressure tube, and finally calculate the vertical-distribution speed value of the measured wind speed.
Description
The utility model belongs to a kind of vertical distribution instrument that is used to measure gas velocity.
Flowing velocity is to describe the major parameter of flow phenomenon.Velocity field is at first considered in the research flow field.Therefore, fluid-velocity survey is at the research ring that is absolutely necessary in the flow phenomenon.Flowing velocity relates to a parameter of many science and technology field; not only fluid mechanics, aerodynamics, blown sand physics, agriculture, forestry, meteorology, geology, ecology, and environmental engineering, Aeronautics and Astronautics engineering science etc. all need to measure flowing velocity.
The utility model provides a kind of sand prevention wind profile Pitot tube of measuring the gas velocity vertical distribution from this purpose.In wind-tunnel and field survey, can be by the force value in the stagnation pressure tube of wind and the force value in the static tube poor, utilize the pressure difference meter of special use to measure wind speed flow field magnitude of pressure differential, calculate measured wind speed vertical distribution velocity amplitude at last.
The purpose of this utility model can realize by following measure:
A kind of sand prevention wind profile Pitot tube is by several probes (1), ellipsoid head (2), stagnation pressure tube (3) and static tube (4) are formed anyhow.Stagnation pressure tube (3) forms two concentric garden pipes with static tube (4), and is fixed in interface (5).There is opening (7) stagnation pressure tube (3) windward side; static tube (4) has some holes (8) to pass its tube wall apart from the terminal some distances of its level; annular space between two pipes is sealed at the front end towards wind; the height that several probes (1) are had nothing in common with each other, and arrange according to the order of sequence in the guard box (6) of packing into stagnation pressure tube (3), static tube (4).
The good effect of advantage of the present utility model and generation is:
Simple in structure, easy to use, solid durable, because way is many, in certain scope that tests the speed, it can reach very high measuring accuracy.Secondly volume is little, and open-air the installation and observation is easy to carry.
This sand prevention wind profile Pitot tube is summarized three outstanding characteristics:
1, owing to pressure in the pipe is a kind of hydrodynamic pressure, when wind during to pipe, increase the pressure of still air in the pipe, form the difference of stagnation pressure tube and static tube, therefore can very accurately measure on the difference that is close together and the change in flow on the close each point on ground.
2, change in flow that can synchro measure wind speed vertical distribution.
3, available simple algebraically calculation is converted to flow speed value to the pressure difference value of reading from little differential pressure gauge, simple and fast, reliable and stable.
Fig. 1, sand prevention wind profile Pitot tube synoptic diagram
Fig. 2, sand prevention wind profile Pitot tube probe diagrammatic cross-section
Fig. 3, sand prevention wind profile Pitot tube probe A-A diagrammatic cross-section
Below in conjunction with accompanying drawing, be described in further detail with regard to the utility model:
A kind of sand prevention wind profile Pitot tube, its probe (1) by 10 diameters ellipsoid head (2) that is 1.6mm with 10 that are communicated with anyhow stagnation pressure tube (3) and static tube (4) form, stagnation pressure tube (3) and static tube (4) form two concentric gardens pipes and also are fixed in interface (5).There is opening (7) stagnation pressure tube (3) windward side, and static tube (4) distance has 8 holes (8) and passes its tube wall, and the ring-like space between two pipes is sealed at the front end towards wind.The height dimension that 10 probes (1) are had nothing in common with each other, and arrange according to the order of sequence in the guard box (6) of packing into stagnation pressure tube (3), static tube (4).
When wind during to pipe, it has increased the pressure of still air in the pipe, because aperture (8) hole face is tangent on direction that fluid flows in the stagnation pressure tube (3) and the static pressure tube wall, therefore form the poor of stagnation pressure tube (3) and static tube (4) force value, therefore, can very accurately measure on the difference that is close together and near the change in flow on the each point on ground, and the differential pressure gauge by joining with perpendicular stagnation pressure tube (3) and static tube (4), the sizes values of the wind speed vertical distribution that can convert measured.
Claims (2)
1, a kind of sand prevention wind profile Pitot tube is characterized in that it being by several probes (1), and ellipsoid head (2), stagnation pressure tube (3) and static tube (4) are formed anyhow, and stagnation pressure tube (3) forms two concentric gardens with static tube (4) and manages, and is fixed in interface (5); There is opening (7) stagnation pressure tube (3) windward side, and static tube (4) has some holes (8) to pass its wall pipe apart from the terminal some distances of its level, and the annular space between two pipes is sealed at the front end towards wind, and arranges in the guard box (6) of packing into according to the order of sequence.
2, according to the described sand prevention wind profile of claim 1 Pitot tube, it is characterized in that: probe (1) has different height in guard box (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99254581 CN2399729Y (en) | 1999-11-26 | 1999-11-26 | Anti-sand wind speed profile pitot tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99254581 CN2399729Y (en) | 1999-11-26 | 1999-11-26 | Anti-sand wind speed profile pitot tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2399729Y true CN2399729Y (en) | 2000-10-04 |
Family
ID=34038174
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99254581 Expired - Fee Related CN2399729Y (en) | 1999-11-26 | 1999-11-26 | Anti-sand wind speed profile pitot tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2399729Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN104122065A (en) * | 2013-04-26 | 2014-10-29 | 中国科学院寒区旱区环境与工程研究所 | Field multipath digital earth-surface shear stress dynamic monitor |
| CN111398624A (en) * | 2020-03-06 | 2020-07-10 | 清远市智慧农业研究院 | Device and method for testing penetrability of canopy of lower washing wind field |
-
1999
- 1999-11-26 CN CN 99254581 patent/CN2399729Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104122065A (en) * | 2013-04-26 | 2014-10-29 | 中国科学院寒区旱区环境与工程研究所 | Field multipath digital earth-surface shear stress dynamic monitor |
| 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 |
| 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 |
| CN111398624A (en) * | 2020-03-06 | 2020-07-10 | 清远市智慧农业研究院 | Device and method for testing penetrability of canopy of lower washing wind field |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |