JPS63162106U

JPS63162106U -

Info

Publication number: JPS63162106U
Application number: JP8173087U
Authority: JP
Priority date: 1987-05-28
Filing date: 1987-05-28
Publication date: 1988-10-24
Also published as: JPH0426725Y2

Description

[Brief explanation of drawings]

図面第１，２図はこの考案の実施例を示すもの
で、第１図はスプールがノーマル位置にある状態
の断面図、第２図はスプールが移動した状態の断
面図で、第３，４図は従来の流量制御弁の断面図
で、第３図はプツシユロツドを最大に突出させた
状態の断面図、第４図はプツシユロツドを完全に
退避させた状態の断面図である。ａ…弁本体、１…インポート、２…制御流ポー
ト、３…余剰流ポート、４…スプール孔、５…ス
プール、７…パイロツトピストン、９…パイロツ
ト室、１０…スプリング室、１３…環状溝、２０
…制御棒、２２…制御オリフイス。 Figures 1 and 2 show an embodiment of this invention. Figure 1 is a cross-sectional view of the spool in its normal position, Figure 2 is a cross-sectional view of the spool in its moved position, and Figures 3 and 4 are cross-sectional views of the spool in its normal position. The figures are cross-sectional views of a conventional flow control valve, FIG. 3 is a cross-sectional view with the push rod fully protruded, and FIG. 4 is a cross-sectional view with the push rod completely retracted. a... Valve body, 1... Import, 2... Control flow port, 3... Surplus flow port, 4... Spool hole, 5... Spool, 7... Pilot piston, 9... Pilot chamber, 10... Spring chamber, 13... Annular groove, 20
...Control rod, 22...Control orifice.

Claims

[Scope of utility model registration request]

An import port, a control flow port, a surplus flow port, and a spool hole are formed in the valve body, and a spool is slidably installed in the spool hole, with one end of the spool facing the pilot chamber, and the other end facing the pilot chamber. facing the spring chamber communicating with the control flow port, an annular groove is formed on the outer periphery of the spool that constantly communicates with the import, and a control orifice is provided in the path that communicates the annular groove with the spring chamber. The pressure on the upstream side of this orifice is applied to the pilot chamber, and the spool moves in response to the pressure in the pilot chamber to control the opening area of the control flow port and to open the annular groove. In a flow control valve configured to communicate between an import port and a surplus flow port through The tip of the control rod is configured to exit from the control orifice when it enters the control orifice and pilot pressure acts on the pilot piston, and the diameter of the entrance and exit portion of the control rod is smaller than the diameter of the control orifice. control valve.