JPS62126726U

JPS62126726U -

Info

Publication number: JPS62126726U
Application number: JP1383086U
Authority: JP
Priority date: 1986-01-31
Filing date: 1986-01-31
Publication date: 1987-08-11

Description

[Brief explanation of the drawing]

第１図ないし第６図は本考案の実施例を示し、
第１図は全体断面図、第２図は第１図の―線
断面図、第３図ないし第５図は動作状態を示す要
部断面図、第６図は、流量変化に伴う差圧の変化
を示すグラフである。第７図は従来例の断面図で
ある。２…管路縮小部、３…噴出ノズル、５…管路拡
大部、６ａ，６ｂ…制御ノズル、７ａ，７ｂ…帰
還流路、１５…バイパス流路、１７…ダイアフラ
ム、３４…弁体、Ａ…第１の測定部、Ｂ…第２の
測定部、Ｃ…ガバナ弁、Ｅ…緊急遮断弁、Ｆ…緊
急遮断用アクチユエータ。 1 to 6 show embodiments of the present invention,
Fig. 1 is an overall sectional view, Fig. 2 is a sectional view taken along the line - - in Fig. 1, Figs. It is a graph showing changes. FIG. 7 is a sectional view of a conventional example. 2...Pipe reduction part, 3...Ejection nozzle, 5...Pipe enlargement part, 6a, 6b...Control nozzle, 7a, 7b...Return flow path, 15...Bypass flow path, 17...Diaphragm, 34...Valve body, A ...First measuring section, B...Second measuring section, C...Governor valve, E...Emergency cutoff valve, F...Emergency cutoff actuator.

Claims

[Scope of utility model registration request]

Pipe reduction section 2, jet nozzle 3, and pipe enlargement section 5
are formed in series in the flow direction, and a pair of control nozzles 6a and 6b are provided at the boundary between the jet nozzle 3 and the expanded pipe section 5, oriented in a direction substantially perpendicular to the jet direction of the jet nozzle 3. Two of the measuring parts A and B were once formed facing each other and forming a pair of return flow passages 7a and 7b connecting both the control nozzles 6a and 6b to the downstream side of the pipe enlarged part 5, respectively. are connected in series, and the first one of these measuring parts A
The ejection nozzle 3 of 1 is formed to have a smaller opening area than the ejection nozzle 3 of the second one B, and a bypass flow path 15 that bypasses the first measurement section A is connected to the second measurement section B. , a diaphragm type governor valve C is installed in the bypass flow path 15, and _the differential pressure P 1 - between the upstream pressure P ₁ and the downstream pressure P ₂ within the set flow rate range.
A feedback type fluidic flowmeter installed to maintain _P2 within a set range, and having a valve body 34 installed on the diaphragm 17 of the governor valve C downstream of the governor valve C. A valve E is provided, and the diaphragm 17 is arranged in a direction to close the emergency shutoff valve E when the governor valve C is fully open.
The feedback type fluidic flowmeter is provided with an emergency shutoff actuator F for moving the flowmeter, and the outlet of the first measuring section A is connected between the governor valve C and the emergency shutoff valve E.