JPH01165400U

JPH01165400U -

Info

Publication number: JPH01165400U
Application number: JP6255188U
Authority: JP
Priority date: 1988-05-12
Filing date: 1988-05-12
Publication date: 1989-11-20

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例の断面図、第２図は
その排水時の状態の部分断面図、第３図は他の実
施例の部分断面図である。１０：ボウル、１１：透孔、１２：弁シート、
１３：排水軸体、１４：ピストン、１６：排水通
路、２１，２１ａ：昇降弁筒、２２，２２ａ：弁
体、２３：上蓋、２６：パイロツト室、３０：第
１のオリフイス、３２：案内筒、３３：オリフイ
スシート、３５，３５ａ：フロート、３８：アー
ム、４３：第２のオリフイス。 FIG. 1 is a sectional view of one embodiment of the present invention, FIG. 2 is a partial sectional view of the draining state, and FIG. 3 is a partial sectional view of another embodiment. 10: Bowl, 11: Through hole, 12: Valve seat,
13: Drainage shaft, 14: Piston, 16: Drainage passage, 21, 21a: Elevating valve cylinder, 22, 22a: Valve body, 23: Upper lid, 26: Pilot chamber, 30: First orifice, 32: Guide cylinder , 33: Orifice seat, 35, 35a: Float, 38: Arm, 43: Second orifice.

Claims

[Scope of utility model registration request]

An annular valve seat is fitted into a through hole formed in the bottom of the bowl, a piston is formed at the upper end within the valve seat, and the piston reaches the lower end from the outer peripheral surface corresponding to the upper surface of the valve seat. A drainage shaft with a drainage passage formed therein is fitted, and a lifting valve cylinder, which has a valve body at its lower end that opens and closes in contact with and separated from the upper surface of the valve seat, and is provided with an upper cover, is tightly attached to the outer periphery of the piston. and is fitted so as to be movable up and down, so that a downward moving force is applied at least when air is supplied into the bowl, and the air in the bowl is connected to the top lid so as to be able to move up and down. A first orifice introduced into the pilot chamber is formed on the upper surface, and an orifice sheet for opening and closing the first orifice is supported on the upper surface so as to be movable up and down along a guide section provided in the lift valve cylinder, A float is fitted around the lifting valve cylinder so as to be freely raised and lowered, and a connecting portion provided on the float is connected to the orifice seat, and the pilot chamber is connected to the lower surface of the piston. An automatic drainage device for an air filter, characterized in that a second orifice having a smaller diameter than the first orifice is formed.