JPS63109652U

JPS63109652U -

Info

Publication number: JPS63109652U
Application number: JP103587U
Authority: JP
Priority date: 1987-01-09
Filing date: 1987-01-09
Publication date: 1988-07-14

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例を示す構成図、第２
図は本実施例における複合流速検出管４の斜視図
、第３図はその―′断面図、第４図は本考案
の動作原理を説明するための実験装置の外観図、
第５図はこの実験に用いた流速検出管の斜視図、
第６図は実験結果を示すもので流速検出管の内部
圧力と仰角θとの関係を示すグラフ、第７図は第
６図の部分拡大図、第８図は被測定流体の流れが
逆転した場合の特性を示すグラフ、第９図は負圧
差検出手段８の他の例を示す構成図、第１０図は
第９図における微小流量検出手段１９の説明図、
第１１図は複合流速検出管４の他の例を示す斜視
図、第１２図は複合流速検出管４の他の例を示す
断面図、第１３図は流速検出管２，３の他の例を
示す断面図である。１……パイプ、２……第１の流速検出管、３…
…第２の流速検出管、４……複合流速検出管、５
，７……開口、８……負圧差検出手段、９，１０
……圧力計、１１，１２……演算手段。 Fig. 1 is a configuration diagram showing one embodiment of the present invention;
The figure is a perspective view of the composite flow velocity detection tube 4 in this embodiment, FIG. 3 is a cross-sectional view thereof, and FIG.
Figure 5 is a perspective view of the flow velocity detection tube used in this experiment.
Figure 6 shows the experimental results, and is a graph showing the relationship between the internal pressure of the flow velocity detection tube and the elevation angle θ, Figure 7 is a partially enlarged view of Figure 6, and Figure 8 shows the flow of the fluid to be measured is reversed. FIG. 9 is a configuration diagram showing another example of the negative pressure difference detection means 8, FIG. 10 is an explanatory diagram of the minute flow rate detection means 19 in FIG. 9,
FIG. 11 is a perspective view showing another example of the composite flow velocity detection tube 4, FIG. 12 is a sectional view showing another example of the composite flow velocity detection tube 4, and FIG. 13 is another example of the flow velocity detection tubes 2 and 3. FIG. 1... Pipe, 2... First flow velocity detection tube, 3...
...Second flow rate detection tube, 4...Combined flow rate detection tube, 5
, 7... Opening, 8... Negative pressure difference detection means, 9, 10
...Pressure gauge, 11, 12...Calculating means.

Claims

[Scope of utility model registration request]

The stable minimum angle θb(
The opening has an opening exposed into the fluid to be measured at an angle of elevation smaller than the minimum angle (with respect to the upstream side of the fluid to be measured at which the negative pressure received from the fluid to be measured is approximately constant regardless of the angle). 1 flow velocity detection tube, larger than (180°-θb), and (1
a second flow velocity detection tube having an opening exposed into the fluid to be measured with an elevation angle smaller than 80° - θa), and a negative pressure generated in the first flow velocity detection tube and a negative pressure generated in the second flow velocity detection tube. and means for calculating the flow velocity of a fluid to be measured from the difference in negative pressure.