JPH0269720U

JPH0269720U -

Info

Publication number: JPH0269720U
Application number: JP14940188U
Authority: JP
Priority date: 1988-11-16
Filing date: 1988-11-16
Publication date: 1990-05-28

Description

[Brief explanation of the drawing]

第１図乃至第４図は本考案の一実施例を示し、
第１図は流量検出器の断面正面図、第２図は流量
検出器に流量指示計を装着した流量計の要部断面
図、第３図は第１図の―断面図、第４図は第
１図に示す流量検出器からキヤツプを取除いた左
側面図、第５図乃至第７図は従来例を示し、第５
図は流量検出器の断面平面図、第６図は同じく断
面正面図、第７図は検出管先端部の断面図である
。２０……流量検出器、２１……検出器本体とな
るノズルブロツク、２３……検出管、２３ａ……
先端部、２３ｂ……二面取りによる平坦面、２３
ｃ……円弧面、２４……流体配管、２７……総圧
通路、２８……静圧通路、２９……開閉弁、２９
ａ，２９ｂ……貫通孔、３２……流量指示計、３
２ａ，３２ｂ……導入通路、３３……総圧孔、３
４……静圧孔、Ａ……流速分布、ＣＬ_１……流体
配管２４の中心軸、ＣＬ_２……ノズルブロツク２
１と検出管２３の中心軸。 1 to 4 show an embodiment of the present invention,
Figure 1 is a cross-sectional front view of the flow rate detector, Figure 2 is a cross-sectional view of the main parts of a flow meter with a flow rate indicator attached to the flow rate detector, Figure 3 is a cross-sectional view of Figure 1, and Figure 4 is The left side view of the flow rate detector shown in Fig. 1 with the cap removed, and Figs. 5 to 7 show conventional examples;
The figure is a cross-sectional plan view of the flow rate detector, FIG. 6 is a cross-sectional front view, and FIG. 7 is a cross-sectional view of the tip of the detection tube. 20...Flow rate detector, 21...Nozzle block serving as the main body of the detector, 23...Detection tube, 23a...
Tip portion, 23b...Flat surface with two chamfers, 23
c...Circular surface, 24...Fluid piping, 27...Total pressure passage, 28...Static pressure passage, 29...Opening/closing valve, 29
a, 29b...Through hole, 32...Flow rate indicator, 3
2a, 32b...Introduction passage, 33...Total pressure hole, 3
4... Static pressure hole, A... Flow velocity distribution, CL ₁ ... Central axis of fluid piping 24, CL ₂ ... Nozzle block 2
1 and the central axis of the detection tube 23.

Claims

[Scope of utility model registration request]

A detection tube is arranged protruding from the front part of the detector body, and a total pressure hole and a static pressure hole are provided at the tip of the detection tube with a circular cross section placed in the fluid piping. a total pressure passage communicating the total pressure hole and a flow rate indicator connected to the rear end of the detector body;
In the flow rate detector forming a static pressure passage that communicates the static pressure hole and the flow rate indicator, either the total pressure passage or the static pressure passage is arranged on the central axis of the detector body and the detection tube. An annular groove is provided around the rear end surface of the detector body where one passage is open, the other passage is opened in the annular groove, and an on-off valve is provided in the detector body to open and close both passages together. , the tip of the detection tube is chamfered in two, a plurality of total pressure holes are formed on one of the arcuate surfaces of the tip, and both chamfered flat surfaces have a radius of the detection tube in which the total pressure holes are formed. A flow rate detector characterized in that static pressure holes are formed on the same plane in the same direction.