超低温截止阀

Ultra-low temperature check valve

Abstract

The utility model discloses an ultra-low temperature check valve. The check valve can be used for solving the problems that the valve flap of the conventional common check valve is sealed with a large force, the sealing performance is poor and the valve flap is closed with high effort. The check valve is characterized in that an upper chamber (5) is communicated with an input medium; a valve flap (2) is divided into a big valve flap (21) and a small valve flap (22); a big valve flap cover (23) and a small valve flap cover (24) are respectively fixed on the big valve flap (21) and the small valve flap (22); the small valve flap cover (24) and the big valve flap cover (23) are sequentially clamped at the end of a valve rod (4); the big valve flap (21) is in sealing fit with a valve seat (3); a small valve seat (25) is arranged in the big valve flap (21); the small valve flap (22) is in sealing fit with the small valve seat (25); and the side wall of the big valve flap (21) is provided with a through hole (26). The check valve can be used for solving the problems that the valve rod and a stuffing are easy to freeze, the valve rod is easy to damage, the valve is opened with high effort and the valve cover wastes materials, and has the characteristics of simple structure and flexibility in opening of the valve.
一种超低温截止阀。主要解决了现有的普通的截止阀需要有较大的力才能使阀瓣密封、密封性能差及关闭阀瓣费力的问题。其特征在于:上腔室(5)与输入介质相通,阀瓣(2)分为大阀瓣(21)及小阀瓣(22),大阀瓣(21)及小阀瓣(22)上分别固定有大阀瓣盖(23)及小阀瓣盖(24),小阀瓣盖(24)、大阀瓣盖(23)依次卡接在阀杆(4)的端部,大阀瓣(21)与阀座(3)密封配合,大阀瓣(21)内设有小阀座(25),小阀瓣(22)与小阀座(25)密封配合,大阀瓣(21)的侧壁设有通孔(26)。同时也解决了阀杆和填料易冻结、易损坏阀杆、开启阀门费力以及阀盖浪费材料问题,具有结构简单及开启阀门灵活的特点。

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    CN-103775657-AMay 07, 2014保一集团有限公司一种低温截止阀