Pilot-controlled water pressure-operated diaphragm shut-off valve
    1.
    发明授权
    Pilot-controlled water pressure-operated diaphragm shut-off valve 失效
    先导控制水压操作隔膜截止阀

    公开(公告)号:US4977923A

    公开(公告)日:1990-12-18

    申请号:US346879

    申请日:1989-05-03

    申请人: Chan-Dong Cho

    发明人: Chan-Dong Cho

    摘要: A pilot controlled diaphragm shut-off valve (13) includes a cushion body (22) disposed in a pilot pressure chamber (20). The cushion body (22)operates to gradually allow the build up of pressure in the pilot pressure chamber (20) as water enters through a pilot orifice (21a) into the pilot pressure chamber (20). Such gradual pressure build up in the pilot pressure chamber (20) allows a gradual closing velocity of the shut-off diaphragm valve (13) and thereby eliminates the water hammer phenomena. An actuating diaphragm (32) is provided for opening and closing a pilot valve (24). Alternatively, a float (43) may be employed for opening and closing the pilot valve (24). Either the actuating diaphragm (32) or the float (43) is linked to a stem (23) and lever (26) mechanism, or alternatively to a magnetic linkage (40, 41, 42a).

    摘要翻译: 先导控制膜片截止阀(13)包括设置在先导压力室(20)中的缓冲体(22)。 随着水通过先导孔(21a)进入先导压力室(20),缓冲体(22)逐渐允许先导压力室(20)中的压力增加。 在先导压力室(20)中累积的这种逐渐的压力允许截止隔膜阀(13)的逐渐闭合速度,从而消除水锤现象。 提供用于打开和关闭先导阀(24)的致动隔膜(32)。 或者,可以使用浮子(43)来打开和关闭先导阀(24)。 致动隔膜(32)或浮子(43)都被连接到杆(23)和杆(26)机构,或者替代地连接到磁连杆(40,41,42a)。