JPS6281114U

JPS6281114U -

Info

Publication number: JPS6281114U
Application number: JP17153485U
Authority: JP
Priority date: 1985-11-06
Filing date: 1985-11-06
Publication date: 1987-05-23

Description

[Brief explanation of the drawing]

第１図は、本考案の一実施例である減圧弁の断
図、第２図は、弁体を取り出して示す外観図、第
３図は、本考案の実施例による減圧弁と通常の減
圧弁の性能を比較して示す線図である。１……本体、２……一次側流路、３……二次側
流路、４……プラグ、５……案内部、６……弁体
、６ａ……大径部、６ｂ……小径部、６ｃ……摺
動部、７……弁ばね、８……弁座、９……Ｏリン
グ、１０……透孔、１１……Ｏリング、１２……
ボンネツト、１３……ダイヤフラム、１４……ス
リツプワツシヤ、１５……調圧ばね、１６……ダ
イヤフラムシート、１７……ステム、１８……リ
リーフポート、１９……ブリードポート、２０…
…パイロツト孔、２１……ビード、２２……Ｏリ
ング、２３……スプリングシート、２４……調圧
ねじ、２５……ハンドルガイド、２６……ハンド
ル、Ａ……バランス室、Ｂ……ダイヤフラム室、
Ｖ……リリーフバルブ。 Fig. 1 is a cross-sectional view of a pressure reducing valve that is an embodiment of the present invention, Fig. 2 is an external view showing the valve body taken out, and Fig. 3 is a pressure reducing valve according to an embodiment of the present invention and a normal pressure reducing valve. FIG. 2 is a diagram comparing and showing the performance of valves. 1...Main body, 2...Primary side flow path, 3...Secondary side flow path, 4...Plug, 5...Guiding section, 6...Valve body, 6a...Large diameter section, 6b...Small diameter Part, 6c...Sliding part, 7...Valve spring, 8...Valve seat, 9...O ring, 10...Through hole, 11...O ring, 12...
Bonnet, 13...Diaphragm, 14...Slip washer, 15...Pressure adjustment spring, 16...Diaphragm seat, 17...Stem, 18...Relief port, 19...Bleed port, 20...
... Pilot hole, 21 ... Bead, 22 ... O-ring, 23 ... Spring seat, 24 ... Pressure adjustment screw, 25 ... Handle guide, 26 ... Handle, A ... Balance chamber, B ... Diaphragm chamber ,
V...Relief valve.

Claims

[Claims for Utility Model Registration] (1) A valve body is provided between the primary side flow path and the secondary side flow path, and the displacement of the valve body causes the flow to flow from the primary side flow path to the secondary side flow path. A direct-acting type pressure reducing valve that adjusts the fluid pressure applied to the flow path and has a relief effect, which is constructed integrally with a diaphragm seat, and is generated in response to fluctuations in fluid pressure in the secondary flow path. A contact portion between a stem that transmits displacement of the diaphragm to the valve body and the valve body constitutes a relief valve, and a relief port is formed in the stem to communicate the diaphragm chamber and the secondary flow path. A pressure reducing valve characterized in that the cross-sectional area of the pilot hole is smaller than the cross-sectional area of the relief port. (2) A fluid balance chamber composed of the valve body and a guide portion on which the valve body slides is communicated with the secondary flow path through a sufficiently large through hole, and the valve body has a sliding portion. The pressure reducing valve according to claim 1 of the utility model registration claim, characterized in that the pressure reducing valve is provided with: (3) A penetrating portion of the stem in the diaphragm is formed to be smaller than an outer diameter of the stem, and a bead formed in the penetrating portion of the diaphragm is configured to fit into the diaphragm sheet. A pressure reducing valve according to claim 1 of the utility model registration claim.