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发明公开
CN110410511A 控制阀 有权

控制阀
摘要：
本发明提供具有活塞部件的控制阀，其能够在保持于活塞部件的密封部件避免压力的积存。活塞单元构成为，包括：活塞部件(36)；保持于活塞部件(36)的第一凹部(36A)的作为密封部件的阀芯(42)；以及卡合于阀芯(42)且将阀芯(42)保持于活塞部件(36)的第一凹部(36A)的保持用环状部件(44)，在保持用环状部件(44)的伸出部(44F)的靠近与阀芯(42)的凹陷(42a)的底面抵接的部分、且接近贯通孔(42b)的内周面的部分，在一个部位形成有贯通固定部(44d)及伸出部(44F)，且在压力比一次侧低的二次侧开口的贯通孔(44c)。
摘要（英）：

The present invention provides a control valve having a piston member that can prevent the accumulation of pressure in a sealing member held in the piston member. A piston unit includes a piston member (36), a valve element (42) working as a sealing member held in the first recess (36A) of the piston member (36), and a holding annular member (44) engaged with the valve element (42) and capable ofholding the valve element (42) in the first recess (36A) of the piston member (36). The portion of the protruding portion (44F) of the holding annular member (44) is close to the portion contacting the bottom surface of the recess (42a) of the valve element (42) and close to the inner peripheral surface of the through hole (42b), and a through hole (44c) penetrating a fixing portion (44d) and theprotruding portion (44F) and opening on the secondary side with a lower pressure than the primary side is formed in one portion.

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