JPH0350216U - - Google Patents
Info
- Publication number
- JPH0350216U JPH0350216U JP10775989U JP10775989U JPH0350216U JP H0350216 U JPH0350216 U JP H0350216U JP 10775989 U JP10775989 U JP 10775989U JP 10775989 U JP10775989 U JP 10775989U JP H0350216 U JPH0350216 U JP H0350216U
- Authority
- JP
- Japan
- Prior art keywords
- pilot
- stem
- pilot valve
- guide hole
- valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000012530 fluid Substances 0.000 claims 1
- -1 polytetrafluoroethylene Polymers 0.000 claims 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims 1
- 239000004810 polytetrafluoroethylene Substances 0.000 claims 1
- 239000011347 resin Substances 0.000 claims 1
- 229920005989 resin Polymers 0.000 claims 1
Landscapes
- Control Of Fluid Pressure (AREA)
Description
第１図は本考案の実施例を示すパイロツト弁部
の断面図、第２図は第１図のパイロツト弁部の開
弁状態を示す断面図、第３図は従来の減圧弁の断
面図である。
１０……本体、１２……入口、１６……出口、
２０……ピストン、２６……パイロツト弁部、２
８……ダイヤフラム、４８，６０……パイロツト
ステム、４６……ステムガイド、６２……パイロ
ツト弁体、７０ａ，ｂ，ｃ……シール部材、７２
ａ，ｂ，ｃ……カラー、７８ａ，ｂ，ｃ……環状
溝。
Fig. 1 is a sectional view of a pilot valve section showing an embodiment of the present invention, Fig. 2 is a sectional view showing the pilot valve section of Fig. 1 in an open state, and Fig. 3 is a sectional view of a conventional pressure reducing valve. be. 10...main body, 12...inlet, 16...exit,
20...Piston, 26...Pilot valve section, 2
8...Diaphragm, 48, 60...Pilot stem, 46...Stem guide, 62...Pilot valve body, 70a, b, c...Seal member, 72
a, b, c... collar, 78a, b, c... annular groove.
Claims (1)
路の間にパイロツト弁を配置し、上面に圧力設定
ばねの弾性力を下面に二次側圧力を作用させたダ
イヤフラムの撓みでパイロツト弁を駆動し、パイ
ロツト弁の開閉によりピストンに作用する流体圧
力を制御して、そのピストンの駆動により主弁口
を開閉するパイロツト式減圧弁に於いて、パイロ
ツト弁部はステムガイドに上下方向に貫通したス
テムガイド孔を開け、ステムガイド孔の下端にパ
イロツト弁口を形成し、その下方からパイロツト
弁口を開閉するパイロツト弁体を配置し、ステム
ガイド孔より小さな径でパイロツト弁体を操作す
るためのパイロツトステムを前記ステムガイド孔
へ摺動可能に挿入し、パイロツトステムには四弗
化エチレン樹脂製で下方に広がつた円錐形のシー
ル部材を配置し、そのシール部材の下端の広がり
部はステムガイド孔の内周面に常時当接するよう
にし、パイロツトステムが降下した状態で前記シ
ール部材の下端の広がり部が係合するようにステ
ムガイド孔の内周面に環状の溝を形成したことを
特徴とする減圧弁のパイロツト弁構造。 A pilot valve is placed between the passage leading to the primary side and the passage leading to the upper surface of the piston, and the pilot valve is driven by the deflection of the diaphragm, which has the elastic force of a pressure setting spring applied to the upper surface and the secondary side pressure applied to the lower surface. In a pilot type pressure reducing valve that opens and closes the main valve port by controlling the fluid pressure acting on the piston by opening and closing the valve, and driving the piston to open and close the main valve port, the pilot valve part has a stem guide hole that penetrates the stem guide in the vertical direction. A pilot valve opening is formed at the lower end of the stem guide hole, a pilot valve element for opening and closing the pilot valve opening is placed from below the pilot valve opening, and a pilot stem for operating the pilot valve element with a smaller diameter than the stem guide hole is installed as described above. The pilot stem is slidably inserted into the stem guide hole, and a conical seal member made of polytetrafluoroethylene resin that expands downward is placed on the pilot stem, and the widening part at the lower end of the seal member is placed inside the stem guide hole. A pressure reduction characterized in that an annular groove is formed in the inner circumferential surface of the stem guide hole so that the pilot stem is in constant contact with the circumferential surface and engaged with the widened portion at the lower end of the seal member when the pilot stem is lowered. Valve pilot valve structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10775989U JPH0350216U (en) | 1989-09-14 | 1989-09-14 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10775989U JPH0350216U (en) | 1989-09-14 | 1989-09-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0350216U true JPH0350216U (en) | 1991-05-16 |
Family
ID=31656437
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10775989U Pending JPH0350216U (en) | 1989-09-14 | 1989-09-14 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0350216U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010228398A (en) * | 2009-03-30 | 2010-10-14 | Yamayasu:Kk | Structure of detachable eraser |
-
1989
- 1989-09-14 JP JP10775989U patent/JPH0350216U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010228398A (en) * | 2009-03-30 | 2010-10-14 | Yamayasu:Kk | Structure of detachable eraser |
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