JPH087457Y2 - Pilot valve for automatic response type pressure reducing valve - Google Patents
Pilot valve for automatic response type pressure reducing valveInfo
- Publication number
- JPH087457Y2 JPH087457Y2 JP1990070855U JP7085590U JPH087457Y2 JP H087457 Y2 JPH087457 Y2 JP H087457Y2 JP 1990070855 U JP1990070855 U JP 1990070855U JP 7085590 U JP7085590 U JP 7085590U JP H087457 Y2 JPH087457 Y2 JP H087457Y2
- Authority
- JP
- Japan
- Prior art keywords
- valve
- tip
- movable partition
- chamber
- 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
Links
Landscapes
- Control Of Fluid Pressure (AREA)
Description
【考案の詳細な説明】 〔産業上の利用分野〕 本考案は、主弁2次側の流体圧力に応じて主弁のチェ
ンバーの流体を導出し、該チェンバーの圧力を変化させ
て主弁体の開度を制御する自動応答型減圧弁用のパイロ
ット弁に関する。[Detailed Description of the Invention] [Industrial field of application] The present invention derives the fluid from the chamber of the main valve according to the fluid pressure on the secondary side of the main valve, and changes the pressure of the chamber to change the pressure of the main valve body. The present invention relates to a pilot valve for an automatic response type pressure reducing valve that controls the opening of the.
〔従来の技術〕 従来、上水道の給水系統等の送液管路下流側の流体圧
力を制御する自動応答型減圧弁として、第2図に示す構
造のものが用いられている。この自動応答型減圧弁は、
主弁1の1次側2とチェンバー3とを流体導入用配管4
で接続し、1次側流体をチェンバー3内に導入するとと
もに、該チェンバー3内の流体を、主弁1の2次側5の
流体圧力に応じて開閉するパイロット弁6を備えたパイ
ロット配管7により主弁1の2次側5に導出してチェン
バー3内の圧力を変化させ、これにより主弁体8の開度
を制御するように構成されている。[Prior Art] Conventionally, an automatic response type pressure reducing valve having a structure shown in FIG. 2 has been used as an automatic response type pressure reducing valve for controlling the fluid pressure on the downstream side of a liquid feeding pipe line of a water supply system for waterworks. This automatic response type pressure reducing valve
The primary side 2 of the main valve 1 and the chamber 3 are connected to the fluid introduction pipe 4
Pilot pipe 7 provided with a pilot valve 6 for connecting the primary side fluid into the chamber 3 and opening / closing the primary side fluid according to the fluid pressure on the secondary side 5 of the main valve 1. Is led to the secondary side 5 of the main valve 1 to change the pressure in the chamber 3, and thereby the opening degree of the main valve body 8 is controlled.
このような構成の自動応答型減圧弁に用いられるパイ
ロット弁6は、通常、弁箱61内を、弁箱軸線と直交する
ダイヤフラムのような可動隔壁62により圧力室63とスプ
リング室64とに区画し、該スプリング室64に、可動隔壁
62を圧力室63側に押圧するスプリング65を収納し、前記
圧力室63を、前記パイロット配管7の内の1次側パイロ
ット配管7aを介して主弁1のチェンバー3に連通させる
とともに2次側パイロット配管7bを介して主弁1の2次
側5に連通させ、1次側パイロット配管7aの先端部7cを
前記圧力室63の周壁から弁箱軸線に向けて圧力室63内に
突出せしめて、1次側パイロット配管7a先端の開口7dを
反可動隔壁側に向けて弁箱軸線上に開口させており、該
開口7dを開閉する弁体66は、前記可動隔壁62の弁箱軸線
が通る中心部に基端を固着して前記圧力室内に延出する
弁棒67の先端部に設けられている。The pilot valve 6 used in the automatic response type pressure reducing valve having such a configuration normally divides the inside of the valve box 61 into a pressure chamber 63 and a spring chamber 64 by a movable partition wall 62 such as a diaphragm orthogonal to the valve box axis. The spring chamber 64 has a movable partition wall.
A spring 65 that presses 62 toward the pressure chamber 63 is housed, and the pressure chamber 63 is communicated with the chamber 3 of the main valve 1 via the primary side pilot pipe 7a of the pilot pipe 7 and the secondary side. Communicate with the secondary side 5 of the main valve 1 through the pilot pipe 7b so that the tip portion 7c of the primary pilot pipe 7a projects from the peripheral wall of the pressure chamber 63 toward the valve box axis into the pressure chamber 63. An opening 7d at the tip of the primary side pilot pipe 7a is opened on the valve box axis toward the anti-movable partition side, and the valve body 66 for opening and closing the opening 7d passes through the valve box axis of the movable partition 62. It is provided at the tip of a valve rod 67, which has a base end fixed to the center and extends into the pressure chamber.
このパイロット弁6は、主弁1の2次側5の流体圧力
が上昇すると、該圧力により前記可動隔壁62がスプリン
グ室64側に押動され、弁体66が1次側パイロット配管7a
の開口7dを閉じ、主弁1の2次側5の流体圧力が低下す
ると、前記可動隔壁62がスプリング65に押動され、弁体
66が1次側パイロット配管7aの開口7dから離れて1次側
パイロット配管7aと2次側パイロット配管7bとが連通す
るように形成されている。In the pilot valve 6, when the fluid pressure on the secondary side 5 of the main valve 1 rises, the movable partition wall 62 is pushed toward the spring chamber 64 by the pressure, and the valve element 66 moves the primary side pilot pipe 7a.
When the opening 7d of the main valve 1 is closed and the fluid pressure on the secondary side 5 of the main valve 1 is reduced, the movable partition 62 is pushed by the spring 65, and the valve body is closed.
66 is formed apart from the opening 7d of the primary pilot pipe 7a so that the primary pilot pipe 7a and the secondary pilot pipe 7b communicate with each other.
しかしながら、従来のパイロット弁6は、その作動の
関係上、弁体66を支持した弁棒67が1次側パイロット配
管7aの先端部7cを貫通して開口7dから突出するように設
けられているため、該弁棒67の貫通部には、1次側パイ
ロット配管7aからの流体の洩れを防止するための密封部
材を配置する必要があった。However, the conventional pilot valve 6 is provided such that the valve rod 67 supporting the valve element 66 penetrates the tip portion 7c of the primary side pilot pipe 7a and projects from the opening 7d due to its operation. Therefore, it is necessary to dispose a sealing member at the penetrating portion of the valve rod 67 to prevent the fluid from leaking from the primary pilot pipe 7a.
このため、該密封部材が弁棒67の動きの抵抗となり、
主弁1の2次側5の流体圧力が変化しても弁体66が作動
しない範囲を生じていた。即ち、主弁1の2次側5の圧
力変化が僅かな場合には密封部材との摺動抵抗により弁
体66が開閉作動せず、したがって主弁体8も開閉作動す
ることがなかった。Therefore, the sealing member serves as a resistance against the movement of the valve rod 67,
Even if the fluid pressure on the secondary side 5 of the main valve 1 changes, there is a range in which the valve element 66 does not operate. That is, when the change in pressure on the secondary side 5 of the main valve 1 was small, the valve element 66 did not open and close due to the sliding resistance with the sealing member, and therefore the main valve element 8 did not open and close.
このようなパイロット弁6の開閉作動の遅れあるいは
不作動は、主弁体8の開度が大きく、流量が多い場合に
は殆ど問題になることはないが、小流量時には主弁体8
の開度制御が僅かな動きになることから、主弁1の2次
側5の圧力変化に感度良く対応できるパイロット弁の開
発が望まれていた。また、主として主弁体8の小開度時
に生じるハンチングは、管の継手や弁類を痛めたり、末
端での流体の使用にも不都合な点を起こしたりしている
ため、その防止が望まれている。Such delay or non-operation of the opening / closing operation of the pilot valve 6 hardly causes a problem when the opening degree of the main valve body 8 is large and the flow rate is large, but at the time of a small flow rate, the main valve body 8
Since there is a slight movement in the opening degree control, there has been a demand for the development of a pilot valve that can sensitively respond to the pressure change on the secondary side 5 of the main valve 1. In addition, hunting that mainly occurs when the main valve body 8 is opened to a small degree causes damage to pipe joints and valves, and also causes inconvenience in the use of fluid at the end. ing.
そこで本考案は、主弁2次側の圧力変化が僅かな場合
のパイロット弁の開閉作動の遅れあるいは不作動を無く
し、主弁2次側の圧力変化に感度良く対応でき、しかも
ハンチングの防止も図れるパイロット弁を提供すること
を目的としている。Therefore, the present invention eliminates the delay or non-operation of the opening / closing operation of the pilot valve when the pressure change on the secondary side of the main valve is slight, and can respond to the pressure change on the secondary side of the main valve with good sensitivity, and also prevents hunting. The purpose is to provide a pilot valve that can be achieved.
上記した目的を達成するために、本考案のパイロット
弁は、弁箱内を、弁箱軸線と直交する可動隔壁により圧
力室とスプリング室とに区画し、該スプリング室に、前
記可動隔壁を圧力室側に押圧するスプリングを収納し、
前記圧力室を、1次側パイロット配管を介して主弁のチ
ェンバーに連通させるとともに2次側パイロット配管を
介して主弁2次側に連通させ、前記1次側パイロット配
管の先端部を前記圧力室の周壁から弁箱軸線に向けて圧
力室内に突出せしめて、1次側パイロット配管先端の開
口を反可動隔壁側に向けて弁箱軸線上に開口し、前記可
動隔壁の弁箱軸線が通る中心部に基端を固着した弁棒を
前記圧力室内に延出し、該弁棒の先端部に設けた弁体に
より前記開口を開閉する自動応答型減圧弁用のパイロッ
ト弁において、前記弁棒を、基端から弁箱軸線上を反可
動隔壁方向に延出して1次側パイロット配管の先端部に
至らない位置で前記圧力室の周壁方向に向けて屈曲した
第1屈曲部と、該第1屈曲部から前記1次側パイロット
配管の先端部を避けて反可動隔壁方向に延出して前記開
口よりも先に至った位置で弁箱軸線方向に向けて屈曲し
て弁箱軸線上に至る第2屈曲部とからなる1本の棒材で
形成し、該第2屈曲部の先端部に設けた前記弁体を前記
開口に対向せしめたことを特徴としている。In order to achieve the above-mentioned object, the pilot valve of the present invention divides the inside of the valve box into a pressure chamber and a spring chamber by a movable partition which is orthogonal to the axis of the valve box, and the movable partition is pressurized in the spring chamber. A spring that presses the room is stored,
The pressure chamber is communicated with the chamber of the main valve through the primary side pilot pipe and is communicated with the secondary side of the main valve through the secondary side pilot pipe, and the tip of the primary side pilot pipe is connected to the pressure side. From the peripheral wall of the chamber toward the valve box axis, projecting into the pressure chamber, the opening of the tip of the primary side pilot pipe is opened on the valve box axis toward the anti-movable partition side, and the valve box axis of the movable partition passes through. In a pilot valve for an automatic response type pressure reducing valve, a valve rod having a base end fixed to a central portion is extended into the pressure chamber, and the opening is opened / closed by a valve body provided at a tip end portion of the valve rod. A first bent portion that extends in the direction opposite to the movable partition wall from the base end toward the anti-movable partition wall and is bent toward the circumferential wall of the pressure chamber at a position that does not reach the tip of the primary pilot pipe; Avoid the tip of the primary side pilot pipe from the bent part And a second bent portion that extends in the direction of the anti-movable partition wall and bends in the direction of the valve box axis at a position beyond the opening and reaches the valve box axis. The valve element provided at the tip of the second bent portion is opposed to the opening.
したがって、可動隔壁の弁箱軸線が通る中心部に基端
を固着した弁棒を第1屈曲部と第2屈曲部とで形成する
ことにより、弁棒が作動しても、圧力室内に突出してい
る1次側パイロット配管の先端部に衝接することはな
く、弁棒の動きが妨げられることがなくなる。また、弁
棒を1本の棒材を屈曲させて形成したから、主弁2次側
の圧力変化に感度良く対応できる。Therefore, by forming the valve rod having the base end fixed to the central portion through which the valve box axis of the movable partition wall passes by forming the first bent portion and the second bent portion, even if the valve rod operates, it projects into the pressure chamber. There is no collision with the tip of the primary pilot pipe, and the movement of the valve stem is not obstructed. Further, since the valve rod is formed by bending a single rod material, it is possible to respond to the pressure change on the secondary side of the main valve with good sensitivity.
以下、本考案の一実施例を第1図に基づいて説明す
る。尚、以下の説明において前記第2図に示した従来例
と同一要素のものには同一符号を付して詳細な説明を省
略する。An embodiment of the present invention will be described below with reference to FIG. In the following description, the same elements as those of the conventional example shown in FIG. 2 are designated by the same reference numerals and detailed description thereof will be omitted.
本実施例のパイロット弁11は、弁箱61内を、前記従来
のパイロット弁と同様に、弁箱軸線CLと直交するダイヤ
フラムのような可動隔壁62により圧力室63とスプリング
室64とに区画し、該スプリング室64に、前記可動隔壁62
を圧力室63側に押圧するスプリング65を収納し、前記圧
力室63を、1次側パイロット配管7aを介して主弁のチェ
ンバーに連通させるとともに2次側パイロット配管7bを
介して主弁2次側に連通させ、前記1次側パイロット配
管7aの先端部7cを圧力室63の周壁63aから弁箱軸線CLに
向けて圧力室63内に突出せしめて、1次側パイロット配
管7a先端の開口7dを反可動隔壁側に向けて弁箱軸線CL上
に開口させており、該開口7dを開閉する弁体12は、前記
可動隔壁62の弁箱軸線CLが通る中心部に基端13aを固着
して圧力室63内に延出する弁棒13の先端部13bに設けら
れている。In the pilot valve 11 of the present embodiment, the inside of the valve box 61 is partitioned into a pressure chamber 63 and a spring chamber 64 by a movable partition 62 such as a diaphragm orthogonal to the valve box axis CL, as in the conventional pilot valve. , The movable partition 62 in the spring chamber 64
A spring 65 that presses the main chamber toward the pressure chamber 63 side, the pressure chamber 63 is communicated with the chamber of the main valve via the primary side pilot pipe 7a, and the main valve secondary via the secondary side pilot pipe 7b. Side, and the tip portion 7c of the primary side pilot pipe 7a is projected from the peripheral wall 63a of the pressure chamber 63 toward the valve box axis CL into the pressure chamber 63, and the opening 7d at the tip of the primary side pilot pipe 7a is formed. Is opened on the valve box axis CL toward the anti-movable partition wall side, and the valve body 12 for opening and closing the opening 7d has a base end 13a fixed to the central portion of the movable partition wall 62 through which the valve box axis CL passes. And is provided at the tip portion 13b of the valve rod 13 extending into the pressure chamber 63.
そして、該弁棒13は、基端13aから弁箱軸線CL上を反
可動隔壁方向に延出して1次側パイロット配管7aの先端
部7bに至らない位置で圧力室63の周壁63a方向に向けて
屈曲した第1屈曲部13cと、該第1屈曲部13cから1次側
パイロット配管7aの先端部7cを避けて反可動隔壁方向に
延出して前記開口7dよりも先に至った位置で弁箱軸線CL
方向に向けて屈曲して弁箱軸線CL上に至る第2屈曲部13
dとからなる1本の棒材で形成され、該第2屈曲部13dの
先端部に設けた前記弁体12を前記開口7dに対向せしめて
いる。Then, the valve rod 13 extends from the base end 13a on the valve box axis CL in the direction opposite to the movable partition wall and faces the peripheral wall 63a of the pressure chamber 63 at a position not reaching the tip portion 7b of the primary side pilot pipe 7a. And the first bent portion 13c that is bent, and the valve at a position that extends from the first bent portion 13c toward the anti-movable partition wall and avoids the tip end portion 7c of the primary pilot pipe 7a, and extends beyond the opening 7d. Box axis CL
Second bent portion 13 that bends in the direction and reaches on the axis CL of the valve box
The valve body 12 is formed of a single rod member consisting of d and the valve body 12 provided at the tip of the second bent portion 13d so as to face the opening 7d.
したがって、可動隔壁62の弁箱軸線CLが通る中心部に
基端13aを固着した弁棒13は、弁棒13が作動しても、第
1屈曲部13cと第2屈曲部13dとが、1次側パイロット配
管7aの先端部7cとの衝接を避けているから、弁棒の動き
が妨げられない。Therefore, in the valve rod 13 having the base end 13a fixed to the central portion of the movable partition wall 62 through which the valve box axis CL passes, the first bent portion 13c and the second bent portion 13d have a 1 Since the collision with the tip portion 7c of the secondary pilot pipe 7a is avoided, the movement of the valve stem is not hindered.
そして、弁棒13は、1次側パイロット配管7aの先端部
7cを貫通しないから、従来の1次側パイロット配管の先
端部の密封部材を貫通する弁棒に比べて、摺動抵抗が発
生せず、しかも弁棒13を1本の棒材で屈曲形成したか
ら、弁体12を感度良く作動させて1次側パイロット配管
7aの開口7dを的確に開閉することができる。The valve rod 13 is the tip of the primary pilot pipe 7a.
Since it does not penetrate 7c, sliding resistance does not occur compared to the conventional valve rod that penetrates the sealing member at the tip of the primary side pilot pipe, and the valve rod 13 is formed by bending with one rod material. To operate the valve body 12 with high sensitivity,
The opening 7d of 7a can be opened and closed properly.
これにより、主弁2次側の圧力変化に応じて主弁体を
確実に作動させることができ、主弁2次側の流体の圧力
及び流量を確実に制御することができるとともに、配管
内にハンチングを発生させる要因である急激な圧力変化
が発生した場合でも、該パイロット弁11を介して主弁体
が的確な作動を行うので、該圧力変化を直ちに収束させ
ることができ、ハンチングを防止することができる。As a result, the main valve body can be reliably operated according to the pressure change on the secondary side of the main valve, the pressure and flow rate of the fluid on the secondary side of the main valve can be reliably controlled, and at the same time, in the pipe. Even when a sudden pressure change that is a factor that causes hunting occurs, the main valve element operates properly via the pilot valve 11, so that the pressure change can be immediately converged and hunting can be prevented. be able to.
以上説明したように、本考案のパイロット弁は、弁箱
内を、弁箱軸線と直交する可動隔壁により圧力室とスプ
リング室とに区画し、該スプリング室に、可動隔壁を圧
力室側に押圧するスプリングを収納し、前記圧力室を、
1次側パイロット配管を介して主弁のチェンバーに連通
させるとともに2次側パイロット配管を介して主弁2次
側に連通させ、1次側パイロット配管の先端部を圧力室
の周壁から弁箱軸線に向けて圧力室内に突出せしめて、
1次側パイロット配管先端の開口を反可動隔壁側に向け
て弁箱軸線上に開口し、可動隔壁の弁箱軸線が通る中心
部に基端を固着して圧力室内に延出する弁棒を、基端か
ら弁箱軸線上を反可動隔壁方向に延出して1次側パイロ
ット配管の先端部に至らない位置で圧力室の周壁方向に
向けて屈曲した第1屈曲部と、該第1屈曲部から1次側
パイロット配管の先端部を避けて反可動隔壁方向に延出
して前記開口よりも先に至った位置で弁箱軸線方向に向
けて屈曲して弁箱軸線上に至る第2屈曲部とからなる1
本の棒材で形成し、該第2屈曲部の先端部に設けた前記
弁体を前記開口に対向せしめたので、可動隔壁の弁箱軸
線が通る中心部に基端を固着した弁棒は、第1屈曲部と
第2屈曲部とにより、弁棒が圧力室内に突出している1
次側パイロット配管の先端部を貫通しないから、従来の
1次側パイロット配管の先端部の密封部材を貫通する弁
棒に比べて、摺動抵抗が発生せず、しかも、弁棒を1本
の棒材で屈曲形成したから、主弁2次側の圧力変化に応
じて円滑に弁体を開閉作動させることができ、主弁体を
的確に開閉制御することができる。As described above, the pilot valve of the present invention divides the inside of the valve box into the pressure chamber and the spring chamber by the movable partition wall orthogonal to the valve box axis, and the movable partition wall is pressed to the pressure chamber side by the spring chamber. A spring for storing the pressure chamber,
Communicate with the main valve chamber through the primary side pilot pipe and communicate with the main valve secondary side through the secondary side pilot pipe, and connect the tip of the primary side pilot pipe from the peripheral wall of the pressure chamber to the valve box axis. To the pressure chamber,
A valve rod that extends to the pressure chamber by opening the opening of the tip of the primary side pilot pipe toward the anti-movable partition wall side and opening it on the valve box axis, and fixing the base end to the center of the movable partition wall through which the valve box axis passes A first bent portion that extends from the base end in the direction of the anti-movable partition wall on the axis of the valve box and does not reach the tip of the primary pilot pipe, and is bent toward the circumferential wall of the pressure chamber; Second bend that extends in the direction opposite to the movable partition wall, avoiding the tip of the primary side pilot pipe, and bends in the valve box axial direction at a position beyond the opening to reach the valve box axial line. 1 consisting of
Since the valve body formed of two rods and provided at the tip of the second bent portion is opposed to the opening, the valve rod having the base end fixed to the center of the movable partition wall through which the valve box axis passes is , The valve stem protrudes into the pressure chamber due to the first bent portion and the second bent portion 1
Since it does not penetrate the tip of the secondary pilot pipe, it does not generate sliding resistance compared to the conventional valve rod that penetrates the sealing member at the tip of the primary pilot pipe. Since the rod is bent and formed, the valve body can be smoothly opened and closed according to the change in pressure on the secondary side of the main valve, and the main valve body can be precisely opened and closed.
したがって、主弁2次側の流体の圧力及び流量を的確
に制御できるとともに、ハンチングも防止することがで
きる。Therefore, the pressure and flow rate of the fluid on the secondary side of the main valve can be accurately controlled, and hunting can be prevented.
第1図は本考案の一実施例を示すパイロット弁の断面
図、第2図は従来のパイロット弁を用いた自動応答型減
圧弁の一例を示す系統図である。 7a……1次側パイロット配管、7b……2次側パイロット
配管、7c……1次側パイロット配管の先端部、7d……開
口、11……パイロット弁、12……弁体、13……弁棒、13
a……弁棒の基端、13b……弁棒の先端部、13c……弁棒
の第1屈曲部、13d……弁棒の第2屈曲部、61……弁
箱、62……可動隔壁、63……圧力室、64……スプリング
室、65……スプリングFIG. 1 is a sectional view of a pilot valve showing an embodiment of the present invention, and FIG. 2 is a system diagram showing an example of an automatic response type pressure reducing valve using a conventional pilot valve. 7a …… Primary side pilot piping, 7b …… Secondary side pilot piping, 7c …… Primary side pilot piping tip, 7d …… Opening, 11 …… Pilot valve, 12 …… Valve element, 13 …… Valve stem, 13
a ... proximal end of valve stem, 13b ... distal end of valve stem, 13c ... first bent part of valve rod, 13d ... second bent part of valve rod, 61 ... valve box, 62 ... movable Partition wall, 63 ... Pressure chamber, 64 ... Spring chamber, 65 ... Spring
Claims (1)
より圧力室とスプリング室とに区画し、該スプリング室
に、前記可動隔壁を圧力室側に押圧するスプリングを収
納し、前記圧力室を、1次側パイロット配管を介して主
弁のチェンバーに連通させるとともに2次側パイロット
配管を介して主弁2次側に連通させ、前記1次側パイロ
ット配管の先端部を前記圧力室の周壁から弁箱軸線に向
けて圧力室内に突出せしめて、1次側パイロット配管先
端の開口を反可動隔壁側に向けて弁箱軸線上に開口し、
前記可動隔壁の弁箱軸線が通る中心部に基端を固着した
弁棒を前記圧力室内に延出し、該弁棒の先端部に設けた
弁体により前記開口を開閉する自動応答型減圧弁用のパ
イロット弁において、前記弁棒を、基端から弁箱軸線上
を反可動隔壁方向に延出して1次側パイロット配管の先
端部に至らない位置で前記圧力室の周壁方向に向けて屈
曲した第1屈曲部と、該第1屈曲部から前記1次側パイ
ロット配管の先端部を避けて反可動隔壁方向に延出して
前記開口よりも先に至った位置で弁箱軸線方向に向けて
屈曲して弁箱軸線上に至る第2屈曲部とからなる1本の
棒材で形成し、該第2屈曲部の先端部に設けた前記弁体
を前記開口に対向せしめたことを特徴とする自動応答型
減圧弁用のパイロット弁。1. A valve chamber is divided into a pressure chamber and a spring chamber by a movable partition wall orthogonal to the valve box axis, and a spring for pressing the movable partition wall toward the pressure chamber is housed in the spring chamber. The pressure chamber is communicated with the chamber of the main valve via the primary side pilot pipe and is communicated with the secondary side of the main valve via the secondary side pilot pipe, and the tip of the primary side pilot pipe is connected to the pressure chamber. From the peripheral wall of the valve box toward the axis of the valve box, and the opening of the tip of the primary pilot pipe toward the side of the anti-movable partition on the axis of the valve box,
For an automatic response type pressure reducing valve in which a valve rod having a base end fixed to a central portion through which the valve box axis of the movable partition passes is extended into the pressure chamber, and the opening is opened / closed by a valve body provided at a tip end portion of the valve rod. In the pilot valve of No. 1, the valve rod extends from the base end in the direction of the anti-movable partition on the valve box axis and is bent toward the peripheral wall of the pressure chamber at a position that does not reach the tip of the primary pilot pipe. A first bent portion and a portion extending from the first bent portion in the direction opposite to the movable partition wall, avoiding the tip portion of the primary pilot pipe, and bent in the valve box axial direction at a position before the opening. And a second bent portion extending to the axis of the valve box and formed of one rod, and the valve element provided at the tip of the second bent portion is made to face the opening. Pilot valve for automatic response type pressure reducing valve.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1990070855U JPH087457Y2 (en) | 1990-07-03 | 1990-07-03 | Pilot valve for automatic response type pressure reducing valve |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1990070855U JPH087457Y2 (en) | 1990-07-03 | 1990-07-03 | Pilot valve for automatic response type pressure reducing valve |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH0433109U JPH0433109U (en) | 1992-03-18 |
JPH087457Y2 true JPH087457Y2 (en) | 1996-03-04 |
Family
ID=31607373
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1990070855U Expired - Fee Related JPH087457Y2 (en) | 1990-07-03 | 1990-07-03 | Pilot valve for automatic response type pressure reducing valve |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH087457Y2 (en) |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4715215U (en) * | 1971-03-22 | 1972-10-23 | ||
JPS4921716A (en) * | 1972-06-22 | 1974-02-26 | ||
JPS53134231A (en) * | 1977-04-26 | 1978-11-22 | Yoshirou Taki | Pressure regulator for high pressure gas |
JPS56103716A (en) * | 1980-01-21 | 1981-08-19 | Osaka Gas Co Ltd | Pressure controller |
JPS57118409U (en) * | 1981-01-10 | 1982-07-22 | ||
JPS57137010U (en) * | 1981-02-20 | 1982-08-26 | ||
JPS58193200U (en) * | 1982-06-18 | 1983-12-22 | 東洋計器株式会社 | Propane gas regulator |
-
1990
- 1990-07-03 JP JP1990070855U patent/JPH087457Y2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JPH0433109U (en) | 1992-03-18 |
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LAPS | Cancellation because of no payment of annual fees |