JPH0355971U

JPH0355971U -

Info

Publication number: JPH0355971U
Application number: JP11707089U
Authority: JP
Priority date: 1989-10-06
Filing date: 1989-10-06
Publication date: 1991-05-29
Anticipated expiration: 2004-10-06
Also published as: JPH0645740Y2

Description

[Brief explanation of the drawing]

第１図は本考案による切換可能な制御弁の一実
施例の縦断面図、第２図は本考案に係る内側弁箱
の斜視図、第３図及び第４図は第２図の夫々−
線及び−線に沿う断面図、第５図及び第６
図は夫々第二の回動位置及び第三の回動位置にあ
る上記内側弁箱の斜視図、第７図は本考案に係る
バイパス流路の変形例を示す上記内側弁箱の斜視
図、第８図は第７図の−線に沿う断面図、第
９図は従来の減圧弁の配管施工方法の例を示す図
である。１……外側弁箱、１ａ……流体入口、１ｂ……
流体出口、２……内側弁箱、２ａ……流入孔、２
ｂ……流出孔、２ｃ……突出部、３……間隙、４
，５，７，１３……シール部材、８……弁座、９
……弁体、１０……弁棒、１１……ストレーナ、
１２……二次側圧力検出孔、１４……ダイアフラ
ム、１５……ダイアフラム室、１６……調節ばね
、１７……ばね保護筒、１８……調節ねじ、１９
……絞り部。 FIG. 1 is a longitudinal sectional view of an embodiment of the switchable control valve according to the present invention, FIG. 2 is a perspective view of the inner valve box according to the present invention, and FIGS.
Sectional views along lines and - lines, Figures 5 and 6
FIG. 7 is a perspective view of the inner valve box showing a modification of the bypass flow path according to the present invention; FIG. 8 is a sectional view taken along the line - in FIG. 7, and FIG. 9 is a diagram showing an example of a conventional piping construction method for a pressure reducing valve. 1... Outer valve box, 1a... Fluid inlet, 1b...
Fluid outlet, 2...Inner valve box, 2a...Inflow hole, 2
b...Outflow hole, 2c...Protrusion, 3...Gap, 4
, 5, 7, 13... Seal member, 8... Valve seat, 9
... Valve body, 10 ... Valve stem, 11 ... Strainer,
12... Secondary pressure detection hole, 14... Diaphragm, 15... Diaphragm chamber, 16... Adjustment spring, 17... Spring protection tube, 18... Adjustment screw, 19
...Aperture section.

Claims

[Scope of utility model registration request]

A control valve in which a valve body is disposed within a valve box having a fluid inlet and a fluid outlet connected to piping to perform pressure control, etc., comprising an outer valve box provided with the fluid inlet and the fluid outlet, and the outer valve body. The valve box is constituted by an inner valve box having an inflow hole and an outflow hole that are rotatably fitted so as to form a gap with the inner circumferential surface of the valve box, and At one rotational position, the fluid passes through the inside of the inner valve housing to establish communication between the fluid inlet and the fluid outlet of the outer valve housing, and at a second rotational position, the fluid inlet and the inflow hole and the outlet of the inner valve housing are communicated with each other. The hole is closed, and the inflow hole and the outflow hole of the inner valve body are closed in a third rotational position, and the fluid inlet and the fluid outlet are communicated through the gap, and the inner valve body is adjusted as appropriate. A flow path switchable control valve characterized in that the flow path can be switched by rotating.