公开(公告)号：US20040195534A1

公开(公告)日：2004-10-07

申请号：US10833026

申请日：2004-04-28

Applicant: CKD CORPORATION

Inventor： Eitaro Ijichi ,  Shigeru Osugi

IPC: F16K031/143 ,  F16K039/02

CPC classification number: F16K31/1266 ,  F16K31/1268

Abstract: A diaphragm valve capable of increasing durability of a diaphragm comprises a valve body internally formed with a valve chamber having an open upper end and a suck-back chamber having an open lower end, between an inlet passage and an outlet passage, and a through hole which provides communication between the valve chamber and the suck-back chamber. The open end of the valve chamber is closed by a first diaphragm which is brought into and out of contact with a valve seat. The open end of the suck-back chamber is closed by a second diaphragm. The first and second diaphragms are substantially identical in shape. Each circumferential edge portion of the first and second diaphragms is tightly retained by a retaining member mountable to the valve body so that the diaphragms are curved outwardly with respect to the valve chamber and the suck-back chamber respectively. The first and second diaphragms are connected by a connecting rod passing through the through hole so that the diaphragms are deformed synchronously by operation of an actuator.

Abstract translation: 能够提高隔膜的耐久性的隔膜阀具有内部形成有阀室的阀体，该阀体具有开口的上端和具有敞开的下端的吸入室，位于入口通道和出口通道之间，通孔 其提供阀室和吸回室之间的连通。 阀室的开口端由与阀座进入和脱离接触的第一隔膜封闭。 吸回室的开口端由第二隔膜封闭。 第一和第二隔膜的形状基本相同。 第一和第二隔膜的每个圆周边缘部分被可安装到阀体的保持构件紧密地保持，使得隔膜相对于阀室和吸回室分别向外弯曲。 第一和第二隔膜通过穿过通孔的连杆连接，使得隔膜通过致动器的操作而同步变形。