JPH01151312U

JPH01151312U -

Info

Publication number: JPH01151312U
Application number: JP4780388U
Authority: JP
Priority date: 1988-04-11
Filing date: 1988-04-11
Publication date: 1989-10-19

Description

[Brief explanation of the drawing]

第１図は本案パイロツト作動形減圧弁における
パイロツト弁組立体の縦断面図、第２図は該パイ
ロツト弁組立体の組付工程について説明する縦断
面図、第３図は従来のパイロツト作動形減圧弁の
縦断面図である。１…弁箱、２…主弁座、４…主弁、７…ピスト
ン、８…上蓋、９…パイロツト弁座、１４…保護
筒、１５…調節ばね、１９…ダイアフラム、２１
…一次側流体通路、２２…制御用一次側流体通路
、２４…パイロツト弁体、２５…パイロツト弁棒
、２６…着座部、２７…突出部、２８…ガイド部
、３０…芯筒、３１…金網、３２…ストレーナ。 Fig. 1 is a longitudinal sectional view of a pilot valve assembly in the pilot operated pressure reducing valve of the present invention, Fig. 2 is a longitudinal sectional view illustrating the assembly process of the pilot valve assembly, and Fig. 3 is a longitudinal sectional view of a conventional pilot operated pressure reducing valve. FIG. 3 is a longitudinal cross-sectional view of the valve. 1...Valve box, 2...Main valve seat, 4...Main valve, 7...Piston, 8...Upper cover, 9...Pilot valve seat, 14...Protection tube, 15...Adjustment spring, 19...Diaphragm, 21
...Primary side fluid passage, 22... Primary side fluid passage for control, 24... Pilot valve body, 25... Pilot valve stem, 26... Seating part, 27... Projection part, 28... Guide part, 30... Core tube, 31... Wire mesh , 32...Strainer.

Claims

[Scope of utility model registration request]

In a pilot-operated pressure reducing valve in which the axial direction of the pilot valve assembly provided on the top cover and the axial direction of the main valve are perpendicular to each other, the pilot valve assembly has the following features:
A pilot valve seat having a spherical pilot valve body, a through hole into which a pilot valve stem fits, and a tapered seating portion formed by expanding the through hole toward the pilot valve chamber; A pilot valve chamber cover has a conical guide portion that is fitted on one end and projects into the pilot valve chamber, and one end is engaged with the tip of the guide portion and the other end is attached to the pilot valve body. It consists of a spring that can be held and pressed against the seating part of the pilot valve seat, and a cylindrical body that is open at both ends and has a number of through holes in which the pilot valve body can be seated, one end of which is attached to the pilot valve seat. a core that is fitted into a protrusion formed along the outer periphery of the seating portion of the pilot valve chamber and whose other end engages with the guide portion of the pilot valve chamber cover so that the pilot valve body is disposed therein; A pilot-operated pressure reducing valve comprising a cylinder and a strainer made of a mesh attached to the outer peripheral surface of the core cylinder.