JP3500344B2 - Open / close valve operation status visualization device - Google Patents

Open / close valve operation status visualization device

Info

Publication number
JP3500344B2
JP3500344B2 JP2000085970A JP2000085970A JP3500344B2 JP 3500344 B2 JP3500344 B2 JP 3500344B2 JP 2000085970 A JP2000085970 A JP 2000085970A JP 2000085970 A JP2000085970 A JP 2000085970A JP 3500344 B2 JP3500344 B2 JP 3500344B2
Authority
JP
Japan
Prior art keywords
valve
operating
piston body
rod
pressure chamber
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.)
Expired - Fee Related
Application number
JP2000085970A
Other languages
Japanese (ja)
Other versions
JP2001271961A (en
Inventor
隆 江尻
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Neriki Valve Co Ltd
Fujikura Composites Inc
Original Assignee
Fujikura Rubber Ltd
Neriki Valve Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Fujikura Rubber Ltd, Neriki Valve Co Ltd filed Critical Fujikura Rubber Ltd
Priority to JP2000085970A priority Critical patent/JP3500344B2/en
Priority to US09/815,735 priority patent/US6805158B2/en
Priority to EP20010107623 priority patent/EP1138995B1/en
Priority to KR1020010016037A priority patent/KR100788818B1/en
Priority to DE2001620026 priority patent/DE60120026T2/en
Priority to TW90107175A priority patent/TW480320B/en
Publication of JP2001271961A publication Critical patent/JP2001271961A/en
Application granted granted Critical
Publication of JP3500344B2 publication Critical patent/JP3500344B2/en
Priority to US10/916,101 priority patent/US6932315B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Landscapes

  • Mechanically-Actuated Valves (AREA)
  • Indication Of The Valve Opening Or Closing Status (AREA)
  • Fluid-Driven Valves (AREA)

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【技術分野】本発明は、流路を開閉する弁に関し、特に
その動作状態を目視で確認することができる装置に関す
る。
TECHNICAL FIELD The present invention relates to a valve for opening and closing a flow path, and more particularly to a device capable of visually confirming the operating state thereof.

【0002】[0002]

【従来技術およびその問題点】ばね力により常時は弁体
を開弁方向または閉弁方向に付勢し、このばね力に抗す
る作動流体の圧力で流路を閉じまたは開く開閉弁は、多
数が知られている。しかし、その開閉弁の動作状態は流
量計、圧力計その他の計器によらなければ知ることがで
きなかった。
2. Description of the Related Art There are many open / close valves that normally urge the valve element in a valve opening direction or a valve closing direction by a spring force and close or open a flow path by the pressure of a working fluid against the spring force. It has been known. However, the operating state of the on-off valve could not be known without a flow meter, a pressure gauge, and other instruments.

【0003】[0003]

【発明の目的】本発明は、開閉弁の動作状態、すなわ
ち、開弁状態にあるのか閉弁状態にあるのか等を目視で
知ることができる、簡単な構造の開閉弁を得ることを目
的とする。
SUMMARY OF THE INVENTION It is an object of the present invention to obtain an opening / closing valve having a simple structure, which enables the operator to visually check the operating state of the opening / closing valve, that is, whether the valve is open or closed. To do.

【0004】[0004]

【発明の概要】本発明は、従来はハウジングから出没す
る部材を設けないとされていた技術常識を見直し、弁体
を作動させる作動ロッドに視認部材を一体に設け、この
視認部材をハウジングから突出させるという着眼に基づ
いてなされたものである。すなわち本発明の開閉弁の動
作状態視認装置は、弁座に接離して流路を開閉する弁体
を作動させる作動ロッド;この作動ロッドを弁体が流路
閉じる方向に付勢するばね手段;作動ロッドに接続さ
れハウジング内に摺動自在に嵌めたピストン体;ハウジ
ング内にピストン体を介して形成された圧力室;及びこ
の圧力室に上記ばね手段に抗して作動ロッドを開弁方向
または閉弁方向に移動させる作動流体を与える圧力供給
手段;を備えた開閉弁において、作動ロッドに形成され
該作動ロッドの端部に開口する、上記圧力室に連通する
作動流体通路;作動ロッドの作動流体通路側端部に同軸
に設けられた筒状ロッドホルダ:この筒状ロッドホルダ
の外周に嵌められ、上記作動ロッドの動作位置に応じて
上記ハウジングからの突出量を変化させる筒状視認部
材、一端部が上記筒状ロッドホルダの内側に位置し、
の作動流体通路とパイロット圧力源とを接続する接続管
路;及び筒状ロッドホルダに着脱可能な強制開弁アタッ
チメントと、この強制開弁アタッチメントが筒状ロッド
ホルダに係合されたとき、該強制開弁アタッチメントを
介して作動ロッドを開弁方向に移動させる操作部材を有
するマニュアル開弁治具;を有することを特徴としてい
る。視認部材は、赤色等の目立つ色に着色するのが実際
的である。
SUMMARY OF THE INVENTION The present invention reexamines the technical common sense that it is conventionally not provided with a member projecting and retracting from a housing, and an operating member for operating a valve element is integrally provided with a visual checking member, and the visual checking member is projected from the housing. It was made based on the idea of making it happen. That is, the on-off valve operating state visualizing device of the present invention is an operating rod that operates a valve body that opens and closes a flow path by contacting and separating from a valve seat; spring means that biases this operating rod in a direction in which the valve body closes the flow path. A piston body connected to the actuating rod and slidably fitted in the housing; a pressure chamber formed in the housing via the piston body; and a direction of opening the actuating rod in the pressure chamber against the spring means. Or a pressure supply means for supplying a working fluid that moves in the valve closing direction; an operating fluid passage communicating with the pressure chamber, the working fluid passage being formed in the operating rod and opening at an end of the operating rod ; Coaxial with the end of the working fluid passage
Cylindrical rod holder provided in: This cylindrical rod holder
A cylindrical visual member that is fitted to the outer periphery of the cylindrical rod holder and that changes the amount of protrusion from the housing according to the operating position of the operating rod, one end of which is located inside the cylindrical rod holder, and the working fluid passage and pilot pressure Connection conduit for connecting to the source; and forcible valve opening detachable from the cylindrical rod holder
Chimment and this forced opening attachment is a cylindrical rod.
When engaged with the holder, the forced valve opening attachment
Via an operating member that moves the operating rod in the valve opening direction via
It is characterized by having a manual valve opening jig; It is practical that the visual recognition member is colored in a prominent color such as red.

【0005】視認部材は、例えば作動ロッドが開弁状態
と閉弁状態のいずれか一方にあるときにはハウジング内
に全体が隠れるようにし、他方にあるときにハウジング
から突出するようにすることができる。
The visual recognition member can be entirely hidden in the housing when the operating rod is in either the valve open state or the valve closed state, and can project from the housing when it is in the other.

【0006】[0006]

【0007】[0007]

【0008】本発明の開閉弁の動作状態視認装置は、開
閉弁の具体的構造を問わずに適用できるが、例えば、本
出願人が特開平11−82804号で提案した緩作動開
閉弁、すなわちさらに、ピストン体及び作動ロッドに相
対移動自在に嵌めた固定軸部材;このピストン体、ハウ
ジング及び固定軸部材により画成された上記圧力室;こ
の圧力室に対して作動流体を与える、ピストン体と固定
軸部材との間の摺動隙間とこの摺動部分に設けたスリッ
ト通路;及びピストン体がばね手段による移動端に位置
するときには、このスリット通路の端部を開放して、圧
力室をスリット通路及びピストン体と固定軸部材の間の
摺動隙間を介して作動流体通路に連通させ、ピストン体
が上記移動端から移動を開始したとき、ピストン体と固
定軸部材の間の摺動隙間を閉じ、上記スリット通路だけ
で圧力室と作動流体通路とを連通させる、ピストン体又
は固定軸部材に支持したシール部材;を有する緩作動開
閉弁に適用することができる。
The on-off valve operating state observing device of the present invention can be applied regardless of the specific structure of the on-off valve. For example, the slow-acting on-off valve proposed by the present applicant in Japanese Patent Laid-Open No. 11-82804, namely, Further, a fixed shaft member fitted to the piston body and the working rod so as to be relatively movable; the pressure chamber defined by the piston body, the housing, and the fixed shaft member; and a piston body for supplying working fluid to the pressure chamber. The sliding gap between the fixed shaft member and the slit passage provided in this sliding portion; and when the piston body is located at the moving end by the spring means, the end portion of this slit passage is opened to slit the pressure chamber. When the piston body starts to move from the moving end by communicating with the working fluid passage through the passage and the sliding gap between the piston body and the fixed shaft member, the sliding movement between the piston body and the fixed shaft member occurs. Close the gap, only the slit passage communicating with the working fluid passage and the pressure chamber, the seal member which is supported on the piston body or the fixed shaft member; can be applied to slow actuation switch valve having a.

【0009】[0009]

【発明の実施形態】図示実施形態は、常閉型の倍力開閉
弁に本発明を適用したものである。この倍力開閉弁の弁
構造は、本出願人が特開平11−82804号で提案し
た弁構造であり、最初にその全体構造を説明する。流路
ブロック11には、同一軸線上の一対の流路接続口1
2、13と、この一対の流路接続口の軸線に対して直交
する開閉弁接続口14が備えられている。流路接続口1
2と13内の流路12a、13aは、開閉弁接続口14
側に向けて開口し、流路12aの開口端に環状弁座15
が設けられている。開閉弁接続口14には、環状弁座1
5と流路13aの開口端とを覆う円板状の金属ダイアフ
ラム16と、その周縁を押えるリテイナー17と、この
リテイナー17内に移動自在に支持された開閉弁体18
とが備えられている。この例では、流路12aが高圧流
体の供給側であり、環状弁座15は、金属ダイアフラム
16の中心に位置している。開閉弁体18は、金属ダイ
アフラム16の中心部に接離し、流路12a内の流体の
圧力に打ち勝つ力で環状弁座15側に押し付けられる
と、金属ダイアフラム16が流路12aと13aの連通
を断つ。
BEST MODE FOR CARRYING OUT THE INVENTION In the illustrated embodiment, the present invention is applied to a normally closed type booster valve. The valve structure of the booster opening / closing valve is the valve structure proposed by the applicant in Japanese Patent Laid-Open No. 11-82804, and the entire structure will be described first. The channel block 11 includes a pair of channel connection ports 1 on the same axis.
2, 13 and an on-off valve connection port 14 orthogonal to the axis of the pair of flow path connection ports are provided. Channel connection port 1
The flow paths 12a and 13a in 2 and 13 are connected to the opening / closing valve connection port 14
The annular valve seat 15 at the open end of the flow path 12a.
Is provided. The on-off valve connection port 14 has an annular valve seat 1
5 and a disk-shaped metal diaphragm 16 covering the opening end of the flow path 13a, a retainer 17 for pressing the peripheral edge thereof, and an opening / closing valve body 18 movably supported in the retainer 17.
And are provided. In this example, the flow path 12 a is on the high pressure fluid supply side, and the annular valve seat 15 is located at the center of the metal diaphragm 16. The on-off valve body 18 is brought into contact with and separated from the central portion of the metal diaphragm 16 and is pressed against the annular valve seat 15 side with a force that overcomes the pressure of the fluid in the flow passage 12a, so that the metal diaphragm 16 connects the flow passages 12a and 13a. cut off.

【0010】開閉弁接続口14には、倍力開閉弁20の
ロワハウジング21aが螺合結合されている。ハウジン
グ21は、このロワハウジング21aと、ロワハウジン
グ21aにロックリング21cで結合されたアッパハウ
ジング21bとからなっている。
The lower housing 21a of the booster on-off valve 20 is screwed into the on-off valve connection port 14. The housing 21 includes the lower housing 21a and an upper housing 21b connected to the lower housing 21a by a lock ring 21c.

【0011】ハウジング21内には、可動部材として、
図1、図2の下方から順に、弁軸アッセンブリ24、一
対の遊動ローラ部材25、及び作動部材26が挿入支持
されている。弁軸アッセンブリ24は、環状弁座15に
接離する方向に開閉弁体18を移動させる弁軸22と、
一対の弁軸ローラ部材23とを有する。一対の弁軸ロー
ラ部材23はそれぞれ、外周ローラ23aと軸部材23
bとからなり、軸部材23bは、弁軸22を一体に有す
る支持ブロック22aに支持されている。一対の弁軸ロ
ーラ部材23(軸部材23b)は、弁軸22の軸線に関
する回転対称位置に、弁軸22の軸線とは交わらずに直
交する位置関係で互いに平行に配置されている。
In the housing 21, as a movable member,
A valve shaft assembly 24, a pair of idler roller members 25, and an actuating member 26 are inserted and supported in order from the bottom of FIGS. 1 and 2. The valve shaft assembly 24 includes a valve shaft 22 that moves the on-off valve body 18 in a direction toward and away from the annular valve seat 15,
It has a pair of valve shaft roller members 23. The pair of valve shaft roller members 23 includes an outer peripheral roller 23a and a shaft member 23, respectively.
The shaft member 23b is supported by a support block 22a integrally including the valve shaft 22. The pair of valve shaft roller members 23 (shaft members 23b) are arranged in parallel with each other in a rotationally symmetric position with respect to the axis of the valve shaft 22 in a positional relationship orthogonal to each other without intersecting with the axis of the valve shaft 22.

【0012】作動部材26は、弁軸22と同軸の作動ロ
ッド27と、この作動ロッド27の中間部に一体に結合
したピストン体29とを一体に有している。ピストン体
29は、その外周部がハウジング21(ロアハウジング
21a)に気密に摺動自在に嵌まり、内周部は、固定軸
部材30の中心筒状部32の外周面32aに摺動自在に
嵌まっている。中心筒状部32の内周面32bには、作
動ロッド27がOリング32cにより気密状態で摺動自
在に挿通されている。固定軸部材30の外周部はハウジ
ング21に気密に固定されており、これらのハウジング
21、ピストン体29(作動ロッド27)、及び固定軸
部材30で、(開弁)圧力室31を画成している。
The actuating member 26 integrally includes an actuating rod 27 coaxial with the valve shaft 22 and a piston body 29 integrally connected to an intermediate portion of the actuating rod 27. An outer peripheral portion of the piston body 29 is fitted into the housing 21 (lower housing 21a) in a slidable manner in an airtight manner, and an inner peripheral portion thereof is slidable on an outer peripheral surface 32a of a central tubular portion 32 of the fixed shaft member 30. It is fitted. An operating rod 27 is slidably inserted in an airtight state by an O-ring 32c on an inner peripheral surface 32b of the central tubular portion 32. The outer peripheral portion of the fixed shaft member 30 is airtightly fixed to the housing 21, and the housing 21, the piston body 29 (operating rod 27), and the fixed shaft member 30 define a (valve opening) pressure chamber 31. ing.

【0013】図5、図6に示すように、圧力室31の中
心筒状部32の外周面32aとピストン体29との間に
は、摺動隙間C1が存在し、同内周面32bと作動ロッ
ド27との間にも摺動隙間C2が存在する。このうち摺
動隙間C2は、Oリング32cによって閉じられ、圧力
室31の気密性が保持されている。圧力室31には、作
動ロッド27に穿設した軸方向通路(作動流体通路)3
3aと径方向通路(同)33bを介して、パイロット圧
(圧縮空気)Pが及ぼされる。
As shown in FIGS. 5 and 6, there is a sliding gap C1 between the outer peripheral surface 32a of the central cylindrical portion 32 of the pressure chamber 31 and the piston body 29, and the inner peripheral surface 32b thereof. There is also a sliding gap C2 with the operating rod 27. Of these, the sliding gap C2 is closed by the O-ring 32c, and the airtightness of the pressure chamber 31 is maintained. The pressure chamber 31 has an axial passage (working fluid passage) 3 formed in the working rod 27.
Pilot pressure (compressed air) P is exerted via 3a and the radial passage (same) 33b.

【0014】ピストン体29とアッパハウジング21b
の間には、圧縮ばね37が挿入されていて、作動部材2
6を常時弁軸アッセンブリ24側に移動付勢している。
作動部材26の作動ロッド27の先端部には、テーパ面
部27aが形成されており、このテーパ面部27aと弁
軸アッセンブリ24の弁軸ローラ部材23との間に、上
記一対の遊動ローラ部材25が挿入されている。テーパ
面部27aは、図3に示すような円錐状のテーパ軸部2
7a1から構成することも、図4に示すような平面から
なる楔面27a2から構成することもできる。
Piston body 29 and upper housing 21b
A compression spring 37 is inserted between the actuating members 2
6 is constantly urged to move toward the valve shaft assembly 24 side.
A taper surface portion 27a is formed at a tip end portion of the operation rod 27 of the operation member 26, and the pair of idle roller members 25 is provided between the taper surface portion 27a and the valve shaft roller member 23 of the valve shaft assembly 24. Has been inserted. The tapered surface portion 27a is a conical tapered shaft portion 2 as shown in FIG.
7a1 or a wedge surface 27a2 having a flat surface as shown in FIG.

【0015】各遊動ローラ部材25は、外周ローラ25
aと軸部材25bとを有し、外周ローラ25aは、固定
軸部材30の下面の凹部30aに軸方向移動が生じない
ように収納され、軸部材25bは、固定軸部材30の下
面案内壁30bに移動自在に案内されている。この一対
の遊動ローラ部材25は、弁軸ローラ部材23と平行を
なし、かつ作動ロッド27のテーパ面部27aと、一対
の弁軸ローラ部材23の間に位置している。作動部材2
6に作用する閉弁圧力は、作動ロッド27のテーパ面部
27a、遊動ローラ部材25、及び弁軸ローラ部材23
を介して弁軸22に伝達される。
Each floating roller member 25 includes an outer peripheral roller 25.
a and a shaft member 25b, the outer peripheral roller 25a is housed in the recess 30a of the lower surface of the fixed shaft member 30 so as not to move in the axial direction, and the shaft member 25b is the lower surface guide wall 30b of the fixed shaft member 30. It is guided to move freely. The pair of idler roller members 25 are parallel to the valve shaft roller member 23 and are located between the tapered surface portion 27 a of the operating rod 27 and the pair of valve shaft roller members 23. Actuating member 2
The valve closing pressure acting on 6 is the taper surface portion 27a of the operating rod 27, the floating roller member 25, and the valve shaft roller member 23.
Is transmitted to the valve shaft 22 via.

【0016】作動ロッド27のテーパ面部27aのテー
パ、遊動ローラ部材25と弁軸ローラ部材23の外径及
び初期位置(開閉弁体18が環状弁座15から離れてい
るときの位置)は、次のように定められている。すなわ
ち、作動部材26が弁軸アッセンブリ24側に移動し、
テーパ面部27a、遊動ローラ部材25、及び弁軸ロー
ラ部材23を介して弁軸22が環状弁座15側に移動す
るとき、作動部材26の単位移動量に対し、弁軸22が
該単位移動量より小さい移動量だけ移動するように、こ
れらが設定されている。例えば、作動部材26の移動
量:弁軸22の移動量=1:0.2あるいは1:0.1
のように定める。また、どの作動状態でも、テーパ面部
27a、遊動ローラ部材25、及び弁軸ローラ部材23
は接触状態を維持し、かつ作動部材26が最大に弁軸ア
ッセンブリ24側に移動したときでも、遊動ローラ部材
25の軸位置は、弁軸ローラ部材23の軸位置より外側
に移動することがない。24aは、弁軸アッセンブリ2
4を開弁側に付勢する弱い圧縮ばねである。
The taper of the taper surface portion 27a of the operating rod 27, the outer diameters of the floating roller member 25 and the valve shaft roller member 23, and the initial position (the position when the opening / closing valve body 18 is separated from the annular valve seat 15) are as follows. It is defined as. That is, the operating member 26 moves to the valve shaft assembly 24 side,
When the valve shaft 22 moves to the annular valve seat 15 side via the taper surface portion 27a, the floating roller member 25, and the valve shaft roller member 23, the unit movement amount of the valve shaft 22 with respect to the unit movement amount of the operating member 26. These are set to move by a smaller movement amount. For example, the movement amount of the operating member 26: the movement amount of the valve shaft 22 = 1: 0.2 or 1: 0.1
Set as follows. Further, in any operating state, the taper surface portion 27a, the floating roller member 25, and the valve shaft roller member 23
Maintains the contact state, and the axial position of the idler roller member 25 does not move outside the axial position of the valve shaft roller member 23 even when the actuating member 26 moves to the valve shaft assembly 24 side at the maximum. . 24a is a valve shaft assembly 2
4 is a weak compression spring that biases valve 4 toward the valve opening side.

【0017】前述のように、固定軸部材31の中心筒状
部32の外周面32aとピストン体29との間には、摺
動隙間C1が存在し(図5ないし図8参照)、この摺動
隙間C1を介して、径方向通路33bからの圧縮空気が
圧力室31に導かれる。この摺動隙間C1を構成する中
心筒状部32には、摺動隙間C1と連通し軸線方向に直
線状にあるいはスパイラル状等に延びる1ないし複数の
スリット通路40が形成されており、また、ピストン体
29には、この摺動隙間C1に臨む一方向シール部材4
1が保持されている。この一方向シール部材41は、中
心筒状部32の外周面32aに接触したときには、摺動
隙間C1を塞ぎ、径方向通路33bと圧力室31とを、
スリット通路40だけを介して連通させる(図6、図
7)。しかし、ピストン体29が圧縮ばね37の力によ
る移動端に位置する図5の状態では、この一方向シール
部材41は、スリット通路40の下端部を開放し(中心
筒状部32の外周面32aから離れ)、径方向通路33
bと圧力室31とを、摺動隙間C1及びスリット通路4
0を介して連通させる。よって、径方向通路33bと圧
力室31との連通面積は、明らかに、図6の状態より図
5の状態の方が大きい。
As described above, the sliding gap C1 exists between the outer peripheral surface 32a of the central cylindrical portion 32 of the fixed shaft member 31 and the piston body 29 (see FIGS. 5 to 8). The compressed air from the radial passage 33b is guided to the pressure chamber 31 via the dynamic gap C1. The central tubular portion 32 forming the sliding gap C1 is formed with one or a plurality of slit passages 40 communicating with the sliding gap C1 and extending linearly or spirally in the axial direction. On the piston body 29, the one-way seal member 4 facing this sliding gap C1.
1 is held. When the one-way seal member 41 contacts the outer peripheral surface 32a of the central tubular portion 32, the one-way seal member 41 closes the sliding gap C1 and separates the radial passage 33b and the pressure chamber 31 from each other.
Communication is established only through the slit passage 40 (FIGS. 6 and 7). However, in the state of FIG. 5 in which the piston body 29 is located at the moving end due to the force of the compression spring 37, the one-way seal member 41 opens the lower end portion of the slit passage 40 (the outer peripheral surface 32a of the central tubular portion 32). Away from), the radial passage 33
b and the pressure chamber 31, the sliding gap C1 and the slit passage 4
Connect via 0. Therefore, the communication area between the radial passage 33b and the pressure chamber 31 is obviously larger in the state of FIG. 5 than in the state of FIG.

【0018】以上の構成は、特開平11−82804号
の実施例と同一の構成である。本実施形態は、この緩作
動型倍力開閉弁に、動作状態視認装置を付加したもので
あり、その実施形態を図1、図2について説明する。作
動ロッド27には、そのリテイナー17の反対側の端部
に、固定ねじ50を介して筒状ロッドホルダ51が固定
されており、この筒状ロッドホルダ51の外周にはさら
に、筒状視認部材52が嵌合されている。一方、アッパ
ハウジング21bには、筒状視認部材52を摺動可能に
嵌める開口21dが形成されており、筒状視認部材52
は、作動ロッド27が閉弁位置にあるときには、この開
口21d内に隠れ(図1、図9)、作動ロッド27が開
弁位置にあるときには、開口21dから突出する(図
2、図9)。筒状視認部材52は、例えば、合成樹脂材
料や金属材料から構成し、目立つ色(例えば赤色)に着
色されている。
The above construction is the same as that of the embodiment of JP-A-11-82804. In the present embodiment, an operating state recognizing device is added to the slow-acting type booster on-off valve, and the embodiment will be described with reference to FIGS. 1 and 2. A cylindrical rod holder 51 is fixed to the operation rod 27 at an end portion on the opposite side of the retainer 17 via a fixing screw 50, and the cylindrical visual confirmation member is further provided on the outer periphery of the cylindrical rod holder 51. 52 is fitted . On the other hand, the upper housing 21b is formed with an opening 21d into which the tubular visual confirmation member 52 is slidably fitted.
Is hidden in the opening 21d when the operating rod 27 is in the valve closing position (FIGS. 1 and 9), and protrudes from the opening 21d when the operating rod 27 is in the valve opening position (FIGS. 2 and 9). . The tubular visual recognition member 52 is made of, for example, a synthetic resin material or a metal material, and is colored in a noticeable color (for example, red).

【0019】作動ロッド27には、筒状ロッドホルダ5
1内に位置させて、軸方向通路33aに通じる管路継手
54が結合されている。この管路継手54には、管路
(フレキシブルチューブ)55が接続され、管路55
は、開閉制御弁56、レギュレータ57及びパイロット
圧力源58に順に接続されている。
The operating rod 27 includes a cylindrical rod holder 5
A pipe joint 54, which is located inside 1, and communicates with the axial passage 33a is connected. A pipeline (flexible tube) 55 is connected to the pipeline joint 54, and the pipeline 55
Are sequentially connected to the opening / closing control valve 56, the regulator 57, and the pilot pressure source 58.

【0020】本実施形態の倍力開閉弁は次のように動作
する。圧力室31に圧縮空気を導入しない状態では、圧
縮ばね37の力により、作動部材26が弁軸アッセンブ
リ24側に移動する。この移動力(閉弁力)は、作動ロ
ッド27のテーパ面部27a、遊動ローラ部材25、及
び弁軸ローラ部材23を介して弁軸22に伝達され、弁
軸22が開閉弁体18を環状弁座15側に移動させて、
図1のように、金属ダイアフラム16を介して流路12
aと13aの連通を断つ。
The booster on-off valve of this embodiment operates as follows. When the compressed air is not introduced into the pressure chamber 31, the force of the compression spring 37 moves the actuating member 26 toward the valve shaft assembly 24 side. This moving force (valve closing force) is transmitted to the valve shaft 22 via the taper surface portion 27a of the operating rod 27, the idle roller member 25, and the valve shaft roller member 23, and the valve shaft 22 causes the open / close valve body 18 to move to the annular valve. Move it to the seat 15 side,
As shown in FIG. 1, the flow path 12 is formed through the metal diaphragm 16.
Break communication between a and 13a.

【0021】また、このとき、図5に示すように、ピス
トン体29に保持されている一方向シール部材41は、
中心筒状部32の外周面32aから離れてスリット通路
40の下端部を開放し、パイロット圧力源58(径方向
通路33b)と圧力室31とを、摺動隙間C1及びスリ
ット通路40による大きい連通面積で連通させている。
At this time, as shown in FIG. 5, the one-way seal member 41 held by the piston body 29 is
The lower end portion of the slit passage 40 is opened apart from the outer peripheral surface 32a of the central tubular portion 32, and the pilot pressure source 58 (radial passage 33b) and the pressure chamber 31 are communicated with each other by the sliding gap C1 and the slit passage 40. Communicate by area.

【0022】この状態から、開閉制御弁56を開き、パ
イロット圧力源58の圧縮空気を、管路55、管路継手
54を介して、作動ロッド27の軸方向通路33aと径
方向通路33bに導くと、この圧縮空気は、中心筒状部
32とピストン体29との間の摺動隙間C1及びスリッ
ト通路40を介して、圧力室31に導かれる。よって、
摺動隙間C1とスリット通路40の合計断面積に基づく
流量の圧縮空気が圧力室31に流れ、圧縮ばね37に抗
するに十分な圧力が瞬時に圧力室31に満たされ、ピス
トン体29(作動ロッド27)は、僅かに移動し、弁軸
22は、上の例では、このピストン体29の移動量の1
/10あるいは1/5数分の1だけ微動する。その結
果、開閉弁体18が環状弁座15から僅かに離れて開弁
が開始される。この開弁に至る迄のデッドタイムは、図
9の区間aに相当し、このデッドタイムを短くすること
ができる。
From this state, the opening / closing control valve 56 is opened, and the compressed air from the pilot pressure source 58 is guided to the axial passage 33a and the radial passage 33b of the operating rod 27 via the pipe 55 and the pipe joint 54. Then, this compressed air is guided to the pressure chamber 31 via the sliding gap C1 between the central tubular portion 32 and the piston body 29 and the slit passage 40. Therefore,
Compressed air having a flow rate based on the total cross-sectional area of the sliding gap C1 and the slit passage 40 flows into the pressure chamber 31, and the pressure chamber 31 is instantly filled with a pressure sufficient to resist the compression spring 37. The rod 27) moves slightly, and the valve shaft 22 moves in the above example by 1 of the amount of movement of this piston body 29.
Finely moves by / 10 or 1/5. As a result, the opening / closing valve body 18 is slightly separated from the annular valve seat 15 and the valve opening is started. The dead time until the valve is opened corresponds to the section a in FIG. 9, and this dead time can be shortened.

【0023】開弁が開始されると、そのときには、ピス
トン体29の一方向シール部材41は、中心筒状部32
(固定軸部材31)の外周面32aに接触し、摺動隙間
C1を閉塞するようになる(図6)。つまり、径方向通
路33bと圧力室31とは、スリット通路40を介して
のみ連通する。従って、径方向通路33bと圧力室31
との連通面積は、急激に減少し、この状態は、図7に示
すように、一方向シール部材41が外周面32aに接触
している状態が続く限り続く。よって、圧力室31に導
かれる単位時間当りの圧縮空気の量は制限され、ピスト
ン体29(作動ロッド27、弁軸22)は、低速で移動
する(図9区間b)。この区間bの作動ロッド27(弁
軸22)の移動が緩作動開弁動作である。
When the valve opening is started, at that time, the one-way seal member 41 of the piston body 29 has the central tubular portion 32.
It contacts the outer peripheral surface 32a of the (fixed shaft member 31) and closes the sliding gap C1 (FIG. 6). That is, the radial passage 33 b and the pressure chamber 31 communicate with each other only via the slit passage 40. Therefore, the radial passage 33b and the pressure chamber 31
The communication area with and sharply decreases, and this state continues as long as the one-way seal member 41 is in contact with the outer peripheral surface 32a as shown in FIG. Therefore, the amount of compressed air introduced into the pressure chamber 31 per unit time is limited, and the piston body 29 (actuating rod 27, valve shaft 22) moves at a low speed (section b in FIG. 9). The movement of the actuation rod 27 (valve shaft 22) in this section b is the slow-acting valve opening operation.

【0024】ピストン体29がさらに上昇すると、やが
て一方向シール部材41は中心筒状部32の外周面32
aとの接触を解く(図8、図2)。この状態は、パイロ
ット圧力源58(径方向通路33b)と圧力室31と
が、直接連通する状態であり、よって作動ロッド27
(弁軸22)は急速に開弁端に達する。開弁端は、ピス
トン体29がハウジング21のストッパ面42に当接す
る位置で規制される。この区間は、図9の区間cに相当
する。
When the piston body 29 further rises, the one-way seal member 41 eventually becomes the outer peripheral surface 32 of the central cylindrical portion 32.
The contact with a is released (FIGS. 8 and 2). In this state, the pilot pressure source 58 (radial passage 33b) and the pressure chamber 31 are in direct communication with each other, and thus the operating rod 27
The (valve shaft 22) reaches the valve opening end rapidly. The valve open end is regulated at a position where the piston body 29 contacts the stopper surface 42 of the housing 21. This section corresponds to section c in FIG.

【0025】以上の全体の開弁動作をみると、圧縮空気
を圧力室31に導入する開弁初期(開弁信号を与えたと
き)には、少ないデッドタイム(図9の区間a)でピス
トン体29(弁軸22)が移動を開始し、開弁が始まる
と緩作動が得られ(同b)、弁開度が一定値に達する
と、直ちに全開する(同c)という開弁動作が得られ
る。勿論、最後の急速開弁動作が不要であれば、ピスト
ン体29の全ストロークにおいて、一方向シール部材4
1が外周面32aに接触するように諸要素を設定すれば
よい。緩作動速度は、スリット通路40の合計断面積に
よって設定することができる。
Looking at the overall valve opening operation as described above, in the initial valve opening (when a valve opening signal is given) when the compressed air is introduced into the pressure chamber 31, the piston is operated with a small dead time (section a in FIG. 9). When the body 29 (valve shaft 22) starts to move and the opening of the valve starts, a slow operation is obtained (the same b), and when the valve opening reaches a constant value, the valve is opened fully (the same c). can get. Of course, if the last quick valve opening operation is unnecessary, the one-way seal member 4 is used for the entire stroke of the piston body 29.
The various elements may be set so that 1 contacts the outer peripheral surface 32a. The slow operating speed can be set by the total cross-sectional area of the slit passage 40.

【0026】パイロット圧を排気すれば、圧縮ばね37
の力により、弁軸22が開閉弁体18を環状弁座15に
押し付け、閉弁する(一方向シール部材41を用いてい
るため短時間で閉弁する)。このときの力の伝達経路を
見ると、テーパ面部27a、遊動ローラ部材25、及び
弁軸ローラ部材23を介して、作動部材26の閉弁力が
弁軸22に伝達されるとき、作動部材26の単位移動量
より小さい移動量だけ弁軸22が移動するため、小さい
圧縮ばね37の力で大きい閉弁力を得ることができる。
上の例では、圧縮ばね37の力の5倍、10倍の閉弁力
が得られることとなる。
When the pilot pressure is exhausted, the compression spring 37
Force causes the valve shaft 22 to press the on-off valve body 18 against the annular valve seat 15 to close the valve (because the one-way seal member 41 is used, the valve is closed in a short time). Looking at the force transmission path at this time, when the valve closing force of the operating member 26 is transmitted to the valve shaft 22 via the tapered surface portion 27a, the floating roller member 25, and the valve shaft roller member 23, the operating member 26 Since the valve shaft 22 moves by a movement amount smaller than the unit movement amount of, a large valve closing force can be obtained with a small force of the compression spring 37.
In the above example, the valve closing force of 5 times or 10 times the force of the compression spring 37 is obtained.

【0027】そして、本実施形態によると、作動ロッド
27が圧縮ばね37の力による移動端に位置する閉弁状
態では、筒状視認部材52が開口21d内に後退してハ
ウジング21内に隠れ(図1、図9)、作動ロッド27
がパイロット圧力によって開弁位置(全開位置)に移動
すると、筒状視認部材52が開口21dから突出し(図
2、図9)、中間の開弁位置では、筒状視認部材52の
ハウジング21からの突出量が、開弁量に応じて変化す
る。また、この作動ロッド27(筒状視認部材52)の
移動に際して、管路継手54、管路55も作動ロッド2
7と一緒に移動する。よって、動作状態を一目で目視で
きることとなる。
Further, according to this embodiment, in the valve closed state in which the operating rod 27 is located at the moving end by the force of the compression spring 37 , the tubular visual confirmation member 52 retracts into the opening 21d and is hidden in the housing 21 ( 1 and 9), the operating rod 27
When the pilot pressure moves to the valve open position (full open position), the tubular visual confirmation member 52 projects from the opening 21d (FIGS. 2 and 9), and at the intermediate valve open position, the tubular visual confirmation member 52 is removed from the housing 21. The protrusion amount changes according to the valve opening amount. Further, when the operating rod 27 (the tubular visual confirmation member 52) is moved, the pipe joint 54 and the pipe 55 are also operated by the operating rod 2.
Move with 7. Therefore, the operating state can be visually checked at a glance.

【0028】本実施形態は、強制開弁手段をさらに備え
ている。この強制開弁手段は、パイロット圧力源58の
故障等の原因で開弁パイロット圧が得られないとき、手
動で開弁させるためのものである。筒状ロッドホルダ5
1の内周面には、図1、図2に示すように、環状溝51
aが形成されており、この環状溝51aに連通させて、
図11、図12に示すように、直径方向に対向する一対
の軸方向溝51bが形成されている。
The present embodiment further includes a forced valve opening means. The forced valve opening means is for manually opening the valve when the valve opening pilot pressure cannot be obtained due to a failure of the pilot pressure source 58 or the like. Cylindrical rod holder 5
As shown in FIGS. 1 and 2, an annular groove 51
a is formed and communicates with this annular groove 51a,
As shown in FIGS. 11 and 12, a pair of diametrically opposed axial grooves 51b are formed.

【0029】一方、マニュアル開弁治具60は、この筒
状ロッドホルダ51の環状溝51aに軸方向溝51bを
介して係脱可能な強制開弁アタッチメント61と、この
強制開弁アタッチメント61を介して作動ロッド27を
開弁方向に移動させる操作部材62とを備えている。強
制開弁アタッチメント61は、一対の軸方向溝51bに
対応する一対の爪部61aを有し、この爪部61aは、
軸方向溝51bから環状溝51a内に挿入した後該アタ
ッチメント61を回動させると、環状溝51aに係合し
て抜け止められる。一方、操作部材62は、径方向に突
出する操作レバー62aを有する円盤62bと、ハウジ
ング21の開口21dの周縁上に載置される操作台62
cとを有し、強制開弁アタッチメント61と操作部材6
2は、円盤62bの偏心位置に立てた偏心連結ピン62
dで結合されている。円盤62bの周縁は操作台62c
に当接する(図13)。
On the other hand, the manual valve opening jig 60 includes a forced valve opening attachment 61 which can be engaged with and disengaged from the annular groove 51a of the cylindrical rod holder 51 through an axial groove 51b, and the forced valve opening attachment 61. And an operating member 62 for moving the operating rod 27 in the valve opening direction. The forced valve opening attachment 61 has a pair of claw portions 61a corresponding to the pair of axial grooves 51b, and the claw portions 61a are
When the attachment 61 is rotated after being inserted into the annular groove 51a from the axial groove 51b, it is engaged with the annular groove 51a and is prevented from coming off. On the other hand, the operation member 62 includes a disk 62b having an operation lever 62a protruding in the radial direction, and an operation table 62 placed on the periphery of the opening 21d of the housing 21.
c, the forced valve opening attachment 61 and the operating member 6
2 is an eccentric connecting pin 62 which is erected at an eccentric position of the disc 62b
are joined at d. The periphery of the disk 62b is the operation console 62c
(Fig. 13).

【0030】このマニュアル開弁治具60を用いて強制
開弁を行うには、管路継手54から管路55を外し、強
制開弁アタッチメント61の爪部61aを筒状ロッドホ
ルダ51の軸方向溝51bから環状溝51aに嵌め、回
転させて結合する。このとき、偏心連結ピン62dは操
作台62cに最も接近した状態にあり、操作台62cが
同時にハウジング21の頭部上に当接する(図12)。
この図12の状態において、操作レバー62aを介して
円盤62bを回動させると、円盤62bの偏心位置にあ
る偏心連結ピン62dを介して強制開弁アタッチメント
61が持ち上げられる。すると、該アタッチメント61
の一対の爪部61aが軸方向溝51bを介して筒状ロッ
ドホルダ51を持ち上げるため、作動ロッド27が圧縮
ばね37の力に抗して持ち上げられ、開弁する。
In order to perform the forced valve opening by using the manual valve opening jig 60, the pipe 55 is removed from the pipe joint 54, and the claw portion 61a of the forced valve opening attachment 61 is moved in the axial direction of the cylindrical rod holder 51. The groove 51b is fitted into the annular groove 51a, and is rotated and coupled. At this time, the eccentric connecting pin 62d is closest to the operation console 62c, and the operation console 62c simultaneously contacts the head of the housing 21 (FIG. 12).
In the state of FIG. 12, when the disc 62b is rotated via the operation lever 62a, the forced valve opening attachment 61 is lifted via the eccentric connecting pin 62d located at the eccentric position of the disc 62b. Then, the attachment 61
The pair of claws 61a lifts the cylindrical rod holder 51 via the axial groove 51b, so that the operating rod 27 is lifted against the force of the compression spring 37 and the valve is opened.

【0031】以上の実施形態では、作動ロッド27と筒
状ロッドホルダ51を固定ねじ50で結合し、筒状ロッ
ドホルダ51の外周面に筒状視認部材52を固定した
が、これらは一部材から構成してもよい。
In the above embodiment, the actuating rod 27 and the cylindrical rod holder 51 are joined by the fixing screw 50, and the cylindrical visual member 52 is fixed to the outer peripheral surface of the cylindrical rod holder 51. You may comprise.

【0032】図示例は、実際に流路を開閉する弁軸22
(弁軸アッセンブリ24)の動き量に比して、ピストン
体29(作動ロッド27)の動き量が遥かに大きい倍力
開閉弁に本発明を適用したものであるが、弁軸22とピ
ストン体29とが一体に結合されている直結タイプにも
勿論本発明は適用でき、さらに本発明は開閉弁一般に適
用できる。
In the illustrated example, the valve shaft 22 that actually opens and closes the flow path
The present invention is applied to a booster opening / closing valve in which the amount of movement of the piston body 29 (actuating rod 27) is far greater than the amount of movement of the (valve shaft assembly 24). Of course, the present invention can be applied to a direct connection type in which 29 and 29 are integrally connected, and further, the present invention can be applied to opening / closing valves in general.

【0033】[0033]

【0034】[0034]

【発明の効果】本発明によれば、動作状態を目視できる
開閉弁を得ることができる。
According to the present invention, it is possible to obtain an on-off valve whose operating state can be visually checked.

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

【図1】本発明を常閉型の緩作動型倍力開閉弁に適用し
た一実施形態を示す、閉弁状態の縦断面図である。
FIG. 1 is a vertical cross-sectional view in a valve closed state showing an embodiment in which the present invention is applied to a normally-closed slow-acting type booster on-off valve.

【図2】同開弁状態の縦断面図である。FIG. 2 is a longitudinal sectional view of the valve open state.

【図3】図1、図2の開閉弁のテーパ面部、遊動ローラ
部材、及び弁軸遊動部材の関係を示す斜視図である。
FIG. 3 is a perspective view showing a relationship between a tapered surface portion of the on-off valve of FIGS. 1 and 2, a floating roller member, and a valve shaft floating member.

【図4】図1、図2の倍力開閉弁のテーパ面部の他の形
状例を示す、図3と同様の斜視図である。
FIG. 4 is a perspective view similar to FIG. 3, showing another example of the shape of the tapered surface portion of the booster on-off valve of FIGS. 1 and 2.

【図5】ピストン体、固定軸部材及びシール部材の閉弁
時の状態を示す拡大断面図である。
FIG. 5 is an enlarged cross-sectional view showing a state in which the piston body, the fixed shaft member, and the seal member are closed.

【図6】緩作動が始まった状態を示す拡大断面図であ
る。
FIG. 6 is an enlarged cross-sectional view showing a state where a gradual operation has started.

【図7】緩作動中の状態を示す拡大断面図である。FIG. 7 is an enlarged cross-sectional view showing a state during a slow operation.

【図8】緩作動が終了した状態を示す拡大断面図であ
る。
FIG. 8 is an enlarged cross-sectional view showing a state where the gradual operation is completed.

【図9】図1ないし図8の緩作動型倍力開閉弁の開弁特
性例を示すグラフ図である。
FIG. 9 is a graph showing an example of valve opening characteristics of the slow-acting type booster on-off valve of FIGS. 1 to 8;

【図10】図1ないし図8の緩作動型倍力開閉弁の閉弁
状態と開弁状態の外観変化を示す一部平面図である。
FIG. 10 is a partial plan view showing an external appearance change between a closed state and an open state of the slow-acting type booster on / off valve of FIGS. 1 to 8;

【図11】図1ないし図8の緩作動型倍力開閉弁のマニ
ュアル開弁治具の斜視図である。
FIG. 11 is a perspective view of a manual valve opening jig for the slow-acting type booster opening / closing valve of FIGS. 1 to 8;

【図12】同マニュアル開弁治具を用いた開弁操作状態
を示す要部の断面図である。
FIG. 12 is a cross-sectional view of a main part showing a valve opening operation state using the manual valve opening jig.

【図13】図12のXIII‐XIII線に沿う断面図である。13 is a sectional view taken along line XIII-XIII in FIG.

【符号の説明】[Explanation of symbols]

11 流路ブロック 15 環状弁座 16 金属ダイアフラム 18 開閉弁体 20 倍力開閉弁 21 ハウジング 21d 開口 22 弁軸 23 弁軸ローラ部材 24 弁軸アッセンブリ 25 遊動ローラ部材 26 作動部材 27 作動ロッド 27a2 楔面 29 ピストン体 30 固定軸部材 31 圧力室 32 中心筒状部 32a 外周面 32b 内周面 33a 軸方向通路(作動流体通路) 33b 径方向通路(作動流体通路) 34 パイロット圧導入ポート 35 開閉制御弁 36 パイロット圧力源 37 圧縮ばね(付勢手段) 40 スリット通路 41 (一方向)シール部材 50 固定ねじ 51 筒状ロッドホルダ 51a 環状溝 51b 軸方向溝 52 筒状視認部材 54 管路継手 55 管路 56 開閉制御弁 57 レギュレータ 58 パイロット圧力源 60 マニュアル開弁治具 61 強制開弁アタッチメント 61a 爪部 62 操作部材 62a 操作レバー 62b 円盤 62c 操作台 62d 偏心連結ピン 11 flow path block 15 Annular valve seat 16 Metal diaphragm 18 Open / close valve body 20 boost valve 21 housing 21d opening 22 valve shaft 23 Valve shaft roller member 24 valve shaft assembly 25 Floating roller member 26 Actuator 27 Actuating rod 27a2 wedge surface 29 Piston body 30 Fixed shaft member 31 Pressure chamber 32 Central tubular part 32a outer peripheral surface 32b inner peripheral surface 33a Axial passage (working fluid passage) 33b Radial passage (working fluid passage) 34 Pilot pressure introduction port 35 Open / close control valve 36 Pilot pressure source 37 Compression spring (biasing means) 40 slit passage 41 (One-way) Seal member 50 fixing screw 51 Cylindrical rod holder 51a annular groove 51b axial groove 52 Cylindrical visual recognition member 54 Pipe Fitting 55 conduit 56 Open / close control valve 57 Regulator 58 Pilot pressure source 60 Manual valve opening jig 61 Forced valve opening attachment 61a claw 62 Operation member 62a operation lever 62b disc 62c operation console 62d Eccentric connecting pin

───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平11−37342(JP,A) 特開 平1−238786(JP,A) 特開 平11−344151(JP,A) 特開 平11−82804(JP,A) 実開 平5−27458(JP,U) 実開 昭61−40577(JP,U) 実公 昭28−11085(JP,Y1) (58)調査した分野(Int.Cl.7,DB名) F16K 37/00 F16K 31/524 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-11-37342 (JP, A) JP-A-1-238786 (JP, A) JP-A-11-344151 (JP, A) JP-A-11- 82804 (JP, A) Actual development 5-27458 (JP, U) Actual development 61-40577 (JP, U) Actual public 28-11085 (JP, Y1) (58) Fields investigated (Int.Cl. 7 , DB name) F16K 37/00 F16K 31/524

Claims (4)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】 弁座に接離して流路を開閉する弁体を作
動させる作動ロッド; この作動ロッドを弁体が流路を閉じる方向に付勢するば
ね手段; 上記作動ロッドに接続されハウジング内に摺動自在に嵌
めたピストン体; 上記ハウジング内に上記ピストン体を介して形成された
圧力室;及び この圧力室に上記ばね手段に抗して作動ロッドを開弁方
向または閉弁方向に移動させる作動流体を与える圧力供
給手段;を備えた開閉弁において、 上記作動ロッドに形成され該作動ロッドの端部に開口す
る、上記圧力室に連通する作動流体通路;上記作動ロッドの作動流体通路側端部に 同軸に設けられ
た筒状ロッドホルダ: この筒状ロッドホルダの外周に嵌められ、 上記作動ロッ
ドの動作位置に応じて上記ハウジングからの突出量を変
化させる筒状視認部材、一端部が上記筒状ロッドホルダの内側に位置し、 この作
動流体通路とパイロット圧力源とを接続する接続管路;
及び上記筒状ロッドホルダに着脱可能な強制開弁アタッチメ
ントと、この強制開弁アタッチメントが筒状ロッドホル
ダに係合されたとき、該強制開弁アタッチメントを介し
て作動ロッドを開弁方向に移動させる操作部材を有する
マニュアル開弁治具; を有することを特徴とする開閉弁
の動作状態視認装置。
1. An operating rod for operating a valve body that opens and closes a flow path by contacting and separating from a valve seat; spring means for urging the operating rod in a direction in which the valve body closes the flow path; and a housing connected to the operating rod. A piston body slidably fitted therein; a pressure chamber formed in the housing via the piston body; and an operating rod in the pressure chamber in the valve opening direction or valve closing direction against the spring means. An on-off valve provided with a pressure supply means for supplying a working fluid to be moved; a working fluid passage formed in the working rod and opened at an end of the working rod, the working fluid passage communicating with the pressure chamber; the working fluid passage of the working rod. It is installed coaxially at the side end
Cylindrical rod holder: A cylindrical visual member that is fitted to the outer periphery of the cylindrical rod holder and changes the amount of protrusion from the housing according to the operating position of the operating rod, one end of which is the inside of the cylindrical rod holder. A connection line located between the working fluid passage and the pilot pressure source;
And a force valve opening attachment that can be attached to and detached from the cylindrical rod holder.
And the forced valve opening attachment is a cylindrical rod holder.
Via the forced valve opening attachment when engaged
Has an operating member that moves the operating rod in the valve opening direction.
A device for visually checking the operating state of an on-off valve, which comprises a manual valve opening jig .
【請求項2】 請求項1記載の動作状態視認装置におい
て、筒状視認部材は、作動ロッドが開弁状態と閉弁状態
のいずれか一方にあるときにはハウジング内に全体が隠
れ、他方にあるときにハウジングから突出する開閉弁の
動作状態視認装置。
2. The operating state recognizing device according to claim 1, wherein the tubular recognizing member is wholly hidden in the housing when the operating rod is in one of the valve open state and the valve closed state, and is in the other. A device for visually confirming the operating state of the on-off valve protruding from the housing.
【請求項3】 請求項1または2記載の動作状態視認装
置において、筒状視認部材は着色されている開閉弁の動
作状態視認装置。
3. The operating status viewing system according to claim 1 or 2, wherein the tubular viewing member operation state viewing device of the on-off valve that is colored.
【請求項4】 請求項1ないしのいずれか1項記載の
動作状態視認装置において、さらに、 ピストン体及び作動ロッドに相対移動自在に嵌めた固定
軸部材;このピストン体、ハウジング及び固定軸部材に
より画成された上記圧力室;この圧力室に対して作動流
体を与える、ピストン体と固定軸部材との間の摺動隙間
とこの摺動部分に設けたスリット通路;及びピストン体
がばね手段による移動端に位置するときには、このスリ
ット通路の端部を開放して、圧力室をスリット通路及び
ピストン体と固定軸部材の間の摺動隙間を介して作動流
体通路に連通させ、ピストン体が上記移動端から移動を
開始したとき、ピストン体と固定軸部材の間の摺動隙間
を閉じ、上記スリット通路だけで圧力室と作動流体通路
とを連通させる、ピストン体又は固定軸部材に支持した
シール部材;を有する開閉弁の動作状態視認装置。
4. A operating state viewing device according to any one of claims 1 to 3, further fixed shaft member fitted freely move relative to the piston body and the operating rod; the piston body, the housing and the fixed shaft member The pressure chamber defined by the above; the sliding gap between the piston body and the fixed shaft member and the slit passage provided in this sliding portion, which gives the working fluid to this pressure chamber; When the piston body is located at the moving end, the end portion of the slit passage is opened, and the pressure chamber is communicated with the working fluid passage through the slit passage and the sliding gap between the piston body and the fixed shaft member. When the movement is started from the moving end, the sliding gap between the piston body and the fixed shaft member is closed, and the pressure chamber and the working fluid passage are communicated only with the slit passage. Sealing member supported on the shaft member; operation state viewing device of the on-off valve having a.
JP2000085970A 2000-03-27 2000-03-27 Open / close valve operation status visualization device Expired - Fee Related JP3500344B2 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
JP2000085970A JP3500344B2 (en) 2000-03-27 2000-03-27 Open / close valve operation status visualization device
US09/815,735 US6805158B2 (en) 2000-03-27 2001-03-23 Apparatus for visually checking the operational status of a stop valve, and a manual opening apparatus for a normally-closed valve
KR1020010016037A KR100788818B1 (en) 2000-03-27 2001-03-27 An apparatus for visually checking the operational status of a stop valve, and a manual opening apparatus for a normally-closed valve
DE2001620026 DE60120026T2 (en) 2000-03-27 2001-03-27 Device for visually checking the operating state of a shut-off valve and manually operated opening device for a normally closed valve
EP20010107623 EP1138995B1 (en) 2000-03-27 2001-03-27 An apparatus for visually checking the operational status of a stop valve, and a manual opening apparatus for a normally-closed valve
TW90107175A TW480320B (en) 2000-03-27 2001-03-27 An apparatus for visually checking the operational status of a stop valve, and a manual opening apparatus for a normally-closed valve
US10/916,101 US6932315B2 (en) 2000-03-27 2004-08-11 Manual opening apparatus for a normally-closed valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2000085970A JP3500344B2 (en) 2000-03-27 2000-03-27 Open / close valve operation status visualization device

Publications (2)

Publication Number Publication Date
JP2001271961A JP2001271961A (en) 2001-10-05
JP3500344B2 true JP3500344B2 (en) 2004-02-23

Family

ID=18602210

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2000085970A Expired - Fee Related JP3500344B2 (en) 2000-03-27 2000-03-27 Open / close valve operation status visualization device

Country Status (1)

Country Link
JP (1) JP3500344B2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5613420B2 (en) * 2010-02-05 2014-10-22 株式会社フジキン Fluid controller
WO2018168872A1 (en) * 2017-03-17 2018-09-20 株式会社フジキン Fluid control device
KR101986068B1 (en) * 2017-10-31 2019-06-05 현대 파워텍 주식회사 Spool valve for vehicle and manufacturing method thereof

Also Published As

Publication number Publication date
JP2001271961A (en) 2001-10-05

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