JPH03127873U

JPH03127873U -

Info

Publication number: JPH03127873U
Application number: JP3577690U
Authority: JP
Priority date: 1990-04-04
Filing date: 1990-04-04
Publication date: 1991-12-24

Description

[Brief explanation of drawings]

第１図は本考案の一実施例の縦断正面図、第２
図はそのＸ−Ｘ断面図、第３図及び第４図は夫々
欠円状カムの正面図、第５図は第１図のＹ矢視図
、第６図は第２図の摩擦継手の詳細図、第７図は
欠円状カムの作動経過を示す説明図、第８図は弁
開時における縦断正面図、第９図は他の実施例の
縦断正面図である。１……給水口、２……弁座、２ａ……弁座の筒
部分、３……弁座、４……弁体、５……小オリフ
イス、６……バイパス弁、７……排水口、８……
環状隙間、９……バイパス、１０……翼車、１１
……欠円状カム、１２……水量設定軸。 Fig. 1 is a longitudinal sectional front view of one embodiment of the present invention;
The figure is a sectional view taken along the line X-X, FIGS. 3 and 4 are front views of the occluded cam, respectively, FIG. 5 is a view taken along the Y arrow in FIG. 7 is an explanatory view showing the operation progress of the occluded cam, FIG. 8 is a longitudinal sectional front view when the valve is open, and FIG. 9 is a longitudinal sectional front view of another embodiment. 1...Water supply port, 2...Valve seat, 2a...Cylinder part of valve seat, 3...Valve seat, 4...Valve body, 5...Small orifice, 6...Bypass valve, 7...Drain port , 8...
Annular gap, 9... Bypass, 10... Impeller, 11
...Cut circular cam, 12...Water amount setting shaft.

Claims

[Scope of utility model registration request]

A piston-shaped valve body 4 is slidably fitted into a cylinder integrally provided in a valve housing 3 facing a valve seat 2 having a smaller flow path area than the water supply port 1, and a cylinder chamber behind the valve body is installed. A small orifice 5 is used to constantly communicate and connect the cylinder chamber with the water supply port, and the cylinder chamber is always opened to the outside of the valve casing by a bypass having a larger flow path area than the small orifice, and a part of the bypass is always closed. In a water stop valve equipped with a bypass valve 6 that is operated, an annular gap 8 is provided between the cylindrical portion 2a of the valve seat forming the large orifice and the upstream end of the drain port 7 surrounding this, Connecting the downstream end of the bypass 9, which has a flow path area significantly smaller than the valve seat, to the annular gap,
In addition, a reduction gear transmission is carried out between the impeller 10, which is driven by the flow in the bypass downstream of the bypass valve, and the water volume setting shaft 12, which is equipped with a circular cam 11 having a notch for controlling the opening and closing of the bypass valve. A vane wheel type water meter, which is formed by interlocking and connecting a mechanism and a friction joint, is assembled in the valve housing, and the head loss of the flow in the bypass due to the drive of the impeller is reduced by the flow in the valve seat to the annular gap. A quantitative water stop valve characterized in that it is configured to compensate for the pressure drop that occurs on the outlet side.