JPH0189683U

JPH0189683U -

Info

Publication number: JPH0189683U
Application number: JP18574287U
Authority: JP
Priority date: 1987-12-04
Filing date: 1987-12-04
Publication date: 1989-06-13

Description

[Brief explanation of the drawing]

第１図は本考案実施例の断面図、第２図はその
電気回路図、第３図、第４図は作用説明図、第５
図は第２実施例の説明図、第６図は従来例の説明
図であり、図中、２……第１電磁石、３……第２電磁石、６……
リーク流路、７……操作確認スイツチ、２１……
第１バネ、２２……メインリフト弁、２３……第
１弁軸、２４……第１磁性部材、３１……第２バ
ネ、３２……補助リフト弁、３３……第２弁軸、
３４……第２磁性部材。 Fig. 1 is a cross-sectional view of the embodiment of the present invention, Fig. 2 is its electric circuit diagram, Figs. 3 and 4 are action explanatory diagrams, and Fig. 5
The figure is an explanatory diagram of the second embodiment, and FIG. 6 is an explanatory diagram of the conventional example. In the figure, 2...first electromagnet, 3...second electromagnet, 6...
Leak passage, 7... Operation confirmation switch, 21...
First spring, 22...Main lift valve, 23...First valve stem, 24...First magnetic member, 31...Second spring, 32...Auxiliary lift valve, 33...Second valve stem,
34...Second magnetic member.

Claims

[Scope of utility model registration request]

In a safety valve device that opens by a manual opening operation and closes when a gas leak occurs on the downstream side, the main valve includes a first valve shaft 23 and is biased in the valve closing direction by a first spring 21. A lift valve 22 , an auxiliary lift valve 32 disposed on the downstream side thereof, provided with a second valve shaft 33 and biased in the valve opening direction by a second spring 31 , and a flow path of the auxiliary lift valve 32 A leak passage 6 connecting the upper and lower passages of the closing part, and first and second magnetic members 24 respectively disposed at the tips of the first and second valve shafts of each of the lift valves 22 and 32. ,34
and an externally operable operating member 4 for moving the lift valves 22 and 32 against the first and second springs 21 and 31, respectively, and Each of the above lift valves 22, 3
When the lift valve 2 moves, at the final position of its movement range, the above-mentioned first
, the first magnetic member 24, 34 is in contact with the second magnetic member 24, 34 separately.
, second electromagnets 2, 3, and the first and second electromagnets 2, which open and close in conjunction with the operation of the operating member 4.
an operation confirmation switch 7 for turning on and off 3;
A pressure sensitive switch 5 is provided which detects an increase in pressure in the flow path downstream of the flow path closing portion of the auxiliary lift valve 32 and outputs a signal, and when the pressure sensitive switch 5 outputs a signal, the second electromagnet 3 The safety valve device is configured to de-energize the first electromagnet 2 and de-energize the first electromagnet 2 when the signal from the pressure-sensitive switch 5 disappears.