DRAINAGE STRAIGHT STOP VALVE

Japanese Patent JP3266871

B2

PROBLEM TO BE SOLVED: To provide a drainage straight stop valve capable of easily performing replacement of components or maintenance and inspection thereof since the drainage straight stop valve is so constituted that it is fixed by directly screwing a packing box slidingly guiding a top packing for opening and closing a water hole in an inner cylinder having an upper valve rod therein, a drain of the residual water is formed by the inner cylinder and the packing box so that the structure of the packing box is complicated and, at the same time, that the process of disassembly is complicated.
SOLUTION: An upper valve rod 3 and a lower valve rod 2 are connected with a socket body 7, and an inner cylinder 8 having the upper valve rod therein and a packing box 5 are connected with a grand socket body 6 having a structure constituting a drainage channel when a water hole is closed. In addition, a top hanging flange 21 is provided to the front end of the lower valve rod, at the same time, a to packing is divided into a main body 41 and a cover body 42 and is screwed from up and down across the top hanging flange, and it is provided to the front end of the lower valve rold in a detachable manner. A cushion member 43 is laid on a contact surface part of the bottom of the packing box contacting the upper surface of the top packing when the upper surface of the top packing or the lower valve rod is raised.

Takezawa Hajime

JP7133399A

March 18, 2002

March 17, 1999

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Maesawa Supply Industry Co., Ltd.

E03B7/10; F16K41/02; F16K51/00; (IPC1-7): E03B7/10; F16K51/00

JP315648Y2

Kokichi Ishikawa

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