Plug valve |
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| 申请号 | JP6140481 | 申请日 | 1981-04-24 | 公开(公告)号 | JPS57177463A | 公开(公告)日 | 1982-11-01 |
| 申请人 | Kishikawa Tokushu Valve Seisakusho:Kk; | 发明人 | MUKAIYAMA KATSUHIRO; | ||||
| 摘要 | PURPOSE:To facilitate a rotating action of a valve by providing a cavity between the upper face of a plug and a plug suppressor of a plug vlve suitable in use for a high pressure pipe and introducing into this cavity a fluid with a pressure corresponding to the pressure of the fluid in the pipe. CONSTITUTION:Packing seats 3, 4 are providd in contact with the upper and lower sections of a plug 2, and packings 5, 6 are sealed. An upper and a lower covers 7, 8 of the plug 2 are provided, and a worm wheel 14 is fixed to a plug shaft extending through the upper cover 7 and is rotated by a rotating worm 15. A cavity 16 surrounding the plug is formed between the upper cover 7 and the packing 5, and a fluid with a pressure corresponding to the pressure of the fluid in the pipe is inroduced into the cavity 16 through a passage 17. According to this constitution, the plug push-up pressure of the fluid in the pipe and the plug push-down pressure of the introduced fluid are balanced against each other, resulting in a smooth rotating action of the plug. | ||||||
| 权利要求 | |||||||
| 说明书全文 | |||||||
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