JPH0377881U - - Google Patents

Description

【図面の簡単な説明】[Brief explanation of drawings]

第１図ないし第３図は本考案の第１実施例で、
第１図は流量調節弁の縦断面図、第２図は第１図
の負圧導入孔の詳細断面図、第３図は第２図のＡ
−Ａ断面図、第４図ないし第６図は本考案の第２
実施例で第４図は流量調節弁の縦断面図、第５図
は第４図の負圧導入孔の断面図、第６図は第５図
のＢ−Ｂ断面図、第７図は従来の流量調節弁の縦
断面図である。 １……弁棒、２……弁棒ガイドブツシユ、３…
…ボンネツト、４……リーク管、５……弁本体、
６……主弁、７……マフラ、８，１０……切欠き
部、９，１０……負圧導入孔。 Figures 1 to 3 show the first embodiment of the present invention,
Figure 1 is a longitudinal sectional view of the flow rate control valve, Figure 2 is a detailed sectional view of the negative pressure introduction hole in Figure 1, and Figure 3 is A in Figure 2.
-A sectional view, Figures 4 to 6 are the second views of the present invention.
In the example, Fig. 4 is a longitudinal sectional view of the flow rate control valve, Fig. 5 is a sectional view of the negative pressure introduction hole of Fig. 4, Fig. 6 is a sectional view taken along line B-B of Fig. 5, and Fig. 7 is a conventional one. FIG. 1... Valve stem, 2... Valve stem guide bush, 3...
...Bonnet, 4...Leak pipe, 5...Valve body,
6... Main valve, 7... Muffler, 8, 10... Notch, 9, 10... Negative pressure introduction hole.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 弁棒をガイドするガイドブツシユがボンネツト
に嵌め込まれ、前記弁棒と、前記ガイドブツシユ
間の漏れ蒸気を外部に放出しないためにボンネツ
ト内にリーク管を設けた流量調節弁において、前
記ガイドブツシユ内または前記弁棒内に前記リー
ク管による負圧を導くバイパス路を設けたことを
特徴とする流量調節弁の弁棒固着防止機構。 A flow control valve in which a guide bush for guiding a valve stem is fitted into a bonnet, and a leak pipe is provided in the bonnet to prevent leakage steam between the valve stem and the guide bush from being released to the outside. 1. A valve stem sticking prevention mechanism for a flow rate control valve, characterized in that a bypass path is provided therein for guiding the negative pressure caused by the leak pipe.