发明授权
- 专利标题: Solenoid operated pilot valve
- 专利标题(中): 电磁操纵先导阀
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申请号: US09779899申请日: 2001-02-08
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公开(公告)号: US06390441B2公开(公告)日: 2002-05-21
- 发明人: Katsumi Koyama , Tokumi Tsugawa , Shinji Saeki
- 申请人: Katsumi Koyama , Tokumi Tsugawa , Shinji Saeki
- 优先权: JP2000-037455 20000216
- 主分类号: F16K3106
- IPC分类号: F16K3106
摘要:
In a main valve having a solenoid pilot operated valve, a movable core and a hollow plunger are movably received in a sleeve extending from a pressure control chamber through an electromagnetic coil. The plunger is structurally separated from a main valve member. A shaft is slidably received in the plunger. One end of the shaft carries a pilot valve member. A spring engages at the plunger and the shaft such that the free end of the shaft projects a predetermined length beyond an end face of the plunger. As long as the coil is deenergized, the spring separates the pilot valve member from a pilot valve seat. As soon as the coil is energized, the plunger is attracted to the core, the shaft is displaced in relation to the plunger, and the pilot valve member projecting from the lower end of the plunger closes the pilot valve seat. Due to the developing pressure difference, the main valve is closed and kept in a closed state.
公开/授权文献
- US20020003221A1 Solenoid operated pilot valve 公开/授权日:2002-01-10