JPS5847334Y2 - High pressure operated pilot valve - Google Patents
High pressure operated pilot valveInfo
- Publication number
- JPS5847334Y2 JPS5847334Y2 JP1977142680U JP14268077U JPS5847334Y2 JP S5847334 Y2 JPS5847334 Y2 JP S5847334Y2 JP 1977142680 U JP1977142680 U JP 1977142680U JP 14268077 U JP14268077 U JP 14268077U JP S5847334 Y2 JPS5847334 Y2 JP S5847334Y2
- Authority
- JP
- Japan
- Prior art keywords
- valve
- pressure
- fluid
- chamber
- valve body
- 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
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Description
【考案の詳細な説明】
本案は流体を取扱う容器、管路、機器類にpいて一定以
上の高圧となったとき主弁であるリリーフ弁を開き圧力
流体を放出させるように作動する高圧作動パイロット弁
に関するものである。[Detailed explanation of the invention] This invention is a high-pressure operation pilot that opens the main relief valve and releases pressurized fluid when the pressure reaches a certain level or higher in containers, pipes, or equipment that handles fluid. It concerns valves.
流体圧力を開弁方向へ作用させると共にばね力を閉弁方
向へ作用させたムトン、ダイヤフラム等からなる単一の
圧力検出部材を具えた高圧作動パイロット弁はよく知ら
れている。High-pressure operating pilot valves are well known which include a single pressure detection member such as a mutton, diaphragm, etc., which applies fluid pressure in the valve opening direction and a spring force in the valve closing direction.
第5図はその一例であって、主弁の背圧室に接続される
入口101$>よび弁座102と出口103とを有する
弁本体104の出口側に弁体105を挿入し、この弁体
105と一体に動く弁棒106をダイヤフラム107の
中央部に固着し、弁本体104とダイヤフラム107と
に囲1れた圧力流体室108を通路109によって主弁
の入口側に接続すると共に前記入口101と排出路11
0によって接続ム更にダイヤフラム107に閉弁方向へ
働く可調整のはね111を作用させて構成されている。FIG. 5 shows an example of this, in which a valve body 105 is inserted into the outlet side of a valve body 104 having an inlet 101 connected to a back pressure chamber of the main valve, a valve seat 102, and an outlet 103. A valve rod 106 that moves together with the body 105 is fixed to the center of a diaphragm 107, and a pressure fluid chamber 108 surrounded by the valve body 104 and the diaphragm 107 is connected to the inlet side of the main valve by a passage 109, and the inlet 101 and discharge channel 11
Further, an adjustable spring 111 acting in the valve closing direction is applied to the diaphragm 107 by the connecting member 0.
主弁入口側の流体は通路109から絞り112を経て圧
力流体室108に導入されダイヤフラム107に開弁方
向へ作用して居シ、この流体が設定圧力以下のときばば
ね111の力で弁体105が弁座102に着座している
。The fluid on the main valve inlet side is introduced into the pressure fluid chamber 108 from the passage 109 through the throttle 112 and acts on the diaphragm 107 in the valve opening direction. When this fluid is below the set pressure, the force of the spring 111 acts on the valve body. 105 is seated on the valve seat 102.
主弁入口側の流体圧力P1が高くなって設定圧力Pla
に達すると弁体105が弁座102から離れて主弁背圧
室の流体を出口103へ放出し主弁の背圧P3を最低圧
力p3btで低下させる。The fluid pressure P1 on the main valve inlet side increases and the set pressure Pla
When the pressure is reached, the valve body 105 separates from the valve seat 102 and releases the fluid in the main valve back pressure chamber to the outlet 103, reducing the main valve back pressure P3 to the minimum pressure p3bt.
主弁が開弁じて主弁入口側の流体圧力P1が低下すると
ばね111の力が勝って弁体105を閉弁方向へ動作さ
せ、完全に閉弁して背圧P3が主弁入口側の流体圧力P
ieに回復する。When the main valve opens and the fluid pressure P1 on the main valve inlet side decreases, the force of the spring 111 overcomes and moves the valve body 105 in the valve closing direction, and the valve is completely closed and the back pressure P3 is applied to the main valve inlet side. Fluid pressure P
Recover to ie.
この従来のパイロット弁によるとチャタリング現象を避
けることができないが、これはダイヤフッラム107に
作用するばね111の力と流体圧力とによって弁動作速
度が決定され、ばね荷重が一定であるため流体圧力に比
例した速度で開弁lたは閉弁し迅速に動作しないことに
よるものであんその対策として開弁速度を極度に低下さ
せるか反対に→に全開させる手段を採用することが試み
られているが閉弁時にも同じ動作を行わせることができ
ない。This conventional pilot valve cannot avoid chattering, but this is because the valve operating speed is determined by the force of the spring 111 acting on the diaphragm 107 and the fluid pressure, and since the spring load is constant, it is proportional to the fluid pressure. This is due to the valve opening or closing at a certain speed, and the valve does not operate quickly.As a countermeasure to this problem, attempts have been made to drastically reduce the valve opening speed or, on the contrary, to fully open the valve at the same speed. The same operation cannot be performed during valve operation.
第5図の絞り112もその一つであって、大径にすると
高速度で開弁するが閉弁速度が低下し、小径にすると高
速度で閉弁できるが開弁速度が低下し、いずれかでチャ
タリング現象を生じる。The orifice 112 shown in Fig. 5 is one such example; when the diameter is made large, the valve opens at a high speed, but the valve closing speed decreases; when the diameter is made small, the valve can be closed at a high speed, but the valve opening speed decreases, and eventually This causes a chattering phenomenon.
本案は前述のような問題点を解決し、開弁ネ・よび閉弁
のいずれにもチャタリングの心配なく安定した開閉作用
を行うことができる高圧作動パイロット弁を提供するこ
とを目的として考案されたものである。This project was devised for the purpose of solving the above-mentioned problems and providing a high-pressure operating pilot valve that can perform stable opening and closing operations without worrying about chattering when opening or closing the valve. It is something.
そして、この目的を達成するため本案に係る高圧作動パ
イロット弁は、主弁の背圧室に接続される流体の入口お
よび弁座と前記流体の出口とを有する弁本体と、前記弁
座に着座し或いはこれから離間する弁体と、この弁体に
増付けられ弁開閉方向へ可動にして有効面積が異なる二
つの圧力検出部材と、この二つの圧力検出部材の間に形
成され主弁入口側の流体の導入路および前記入口へ開放
する排出路が接続された通路室と、前記導入路に設けら
れた調整可能な流量制御弁と、有効面積が大きい方の第
一の圧力検出部材を挾んで前記通路室と反対側に設けら
れ主弁入口側の流体が常時導入されて開弁方向へ作用す
る圧力流体室と、有効面積が小さい方の第二の圧力検出
部材に作用させた閉弁方向へ働くばねとによって構成し
たことを特徴としている。In order to achieve this purpose, the high-pressure operating pilot valve according to the present invention includes a valve body having a fluid inlet and a valve seat connected to a back pressure chamber of the main valve, and a fluid outlet, and a valve body seated on the valve seat. or a valve body separated from the valve body, two pressure detection members added to this valve body and movable in the valve opening/closing direction and having different effective areas, and a pressure detection member formed between these two pressure detection members on the main valve inlet side. A passage chamber to which a fluid introduction passage and a discharge passage opening to the inlet are connected, an adjustable flow rate control valve provided in the introduction passage, and a first pressure detection member having a larger effective area are sandwiched therebetween. A pressure fluid chamber is provided on the opposite side of the passage chamber, and fluid on the main valve inlet side is constantly introduced to act in the valve opening direction, and a second pressure detection member having a smaller effective area acts in the valve closing direction. It is characterized by being constructed with a spring that acts on the body.
この構成によると、二つの圧力検出部材の一つが開弁動
体を行わせもう一つが閉弁動作を行わせるもので、圧力
検出部材の有効面積差、ばね荷重、流量制御弁の開度な
どによって設定される流体圧力に応じて開弁と閉弁が迅
速に行われる。According to this configuration, one of the two pressure detection members performs the valve opening movement, and the other performs the valve closing operation, and depending on the effective area difference of the pressure detection members, the spring load, the opening degree of the flow rate control valve, etc. The valve opens and closes quickly depending on the set fluid pressure.
即ち、主弁入口側の流体圧力が高くなったときに第一の
圧力検出部材に開弁立が発生してばね荷重が一定であり
且つ第一の圧力検出部材の有効面積が大きいことによっ
て弁体は急速度で全開し、反対に主弁入口側の流体圧力
が低くなると第一の圧力検出部材の開弁力が小さくなっ
てばね荷重により弁体は急速度で弁座に着座するのであ
る。That is, when the fluid pressure on the main valve inlet side becomes high, the first pressure detection member is opened, and the spring load is constant and the effective area of the first pressure detection member is large, so that the valve is closed. The body fully opens rapidly, and conversely, when the fluid pressure on the main valve inlet side decreases, the opening force of the first pressure detection member decreases, and the valve body quickly seats on the valve seat due to the spring load. .
次に本案の実施例を図面に就いて説明すると、流体の入
口1と出口2とを有しそれらの間に弁座3を設けた弁本
体4の流出口側に弁体5を挿入し、この弁体5と一体に
動く弁棒6を二つの平行に配置されたダイヤフラムから
なる圧力検出部材7゜8の中央部に固着すると共にシー
、ル用のベローズ9の自由端側を弁棒6に気密普たは液
密に固着し、弁体側の第一の圧力検出部材7とベローズ
9と弁本体4とで囲昔れた圧力流体室10を通路11に
よって例えば耐圧容器12Aに接続させる。Next, an embodiment of the present invention will be described with reference to the drawings. A valve body 4 is inserted into the outlet side of a valve body 4 which has a fluid inlet 1 and an outlet 2 and has a valve seat 3 between them. A valve stem 6 that moves together with the valve body 5 is fixed to the center of a pressure detection member 7°8 consisting of two parallel diaphragms, and the free end side of the bellows 9 for sealing is attached to the valve stem 6. A pressure fluid chamber 10, which is airtightly or liquidtightly fixed to the valve body and surrounded by the first pressure detection member 7 on the valve body side, the bellows 9, and the valve body 4, is connected to, for example, a pressure vessel 12A through a passage 11.
ベローズ9は弁本体4の出口2と弁座3との間の背室1
3と圧力流体室10とを互いに遮断する。The bellows 9 is a back chamber 1 between the outlet 2 of the valve body 4 and the valve seat 3.
3 and the pressure fluid chamber 10 are isolated from each other.
第二の圧力検出部材8/I′i第一の圧力検出部材7よ
シ有効面積が小さく、これらの間の扁平な空隙は圧力流
体が通過する通路室14を形成していて排出路15によ
り入口1へ開放されていると共に逆止弁付きの調整可能
な流量制御弁16を有する導入路17により前記通路1
1と接続されている。The second pressure detecting member 8/I′i has a smaller effective area than the first pressure detecting member 7, and the flat gap between them forms a passage chamber 14 through which the pressure fluid passes, and the discharge passage 15 Said passage 1 is controlled by an inlet 17 which is open to the inlet 1 and has an adjustable flow control valve 16 with a non-return valve.
1 is connected.
第二の圧力検出部材8の通路室14と反対側にはコイル
状のばね18が押付けてあり、とのばね18のばね受1
9はねじ汗20とバンドル21を有し弁本体4に固定し
たスタンド22にねじ汗20が螺挿さればね力を調節で
きるようになっている。A coiled spring 18 is pressed against the side of the second pressure detection member 8 opposite to the passage chamber 14.
Numeral 9 has a screw cap 20 and a bundle 21, and the screw cap 20 is screwed into a stand 22 fixed to the valve body 4 so that the spring force can be adjusted.
流量制御弁16は弁本体23にテーパ状の弁座24を形
成すると共に球状の弁体25を内蔵し、且つ弁体25の
開き行程を調節するねじ付きストッパ26を弁本体23
に螺挿して構成され、ねじ付きストッパ26により弁座
24ど弁体25との最大隙間を規定して流量制御弁と逆
止弁とを共通の弁座24と弁体25で兼用させである。The flow rate control valve 16 has a tapered valve seat 24 formed in the valve body 23 and a spherical valve body 25 built therein, and a threaded stopper 26 for adjusting the opening stroke of the valve body 25.
The threaded stopper 26 defines the maximum clearance between the valve seat 24 and the valve body 25, so that the common valve seat 24 and valve body 25 serve as both a flow rate control valve and a check valve. .
もつとも、第2図のように針状弁体27を調節ねじ杆2
8の先端に設けて弁座29との間隙を調整させ流量制御
弁と逆止弁とを一個の弁本体23の中にff1Jf固に
設けてもよく、いずれの場合も逆止弁の弁体25に圧力
流体の僅かな正圧力で弁座24から離れ浮上するように
軽比重材料で作られている。However, as shown in FIG.
8 to adjust the gap with the valve seat 29, and the flow rate control valve and the check valve may be provided in one valve body 23, and in either case, the valve body of the check valve 25 is made of a light specific gravity material so that it floats away from the valve seat 24 with a slight positive pressure of the pressure fluid.
このように構成した本実施例は、入口1を耐圧容器12
Aの主弁12Bの背圧室に接続し、耐圧容器12A内の
流体圧力が一定以上となったとき主弁12Bを開かせて
圧力流体を放出させるもので、予めバンドル21を操作
してばね18の荷重を調整すると共に流量制御弁16の
開度を調整しておく。In this embodiment configured in this way, the inlet 1 is connected to the pressure vessel 12.
The main valve 12B is connected to the back pressure chamber of the main valve 12B of A, and when the fluid pressure in the pressure vessel 12A exceeds a certain level, the main valve 12B is opened to release pressurized fluid. 18 and the opening degree of the flow rate control valve 16 is adjusted in advance.
耐圧容器12Aの圧力流体は通路11を通って圧力流体
室10に導入されると共に導入路17を通って通路室1
4に導入され、更に排出路15、入口1を経て主弁12
B に背圧として作用している。The pressure fluid in the pressure vessel 12A is introduced into the pressure fluid chamber 10 through the passage 11 and into the passage chamber 1 through the introduction passage 17.
4, and further passes through the discharge passage 15 and the inlet 1 to the main valve 12.
It acts as a back pressure on B.
このため第一の圧力検出部材70両側には同−圧力が作
用しまた第二の圧力検出部材3には開弁方向の流体圧力
と閉弁方向のばね力とが作用している。Therefore, the same pressure acts on both sides of the first pressure detection member 70, and fluid pressure in the valve opening direction and spring force in the valve closing direction act on the second pressure detection member 3.
ベローズ9は圧力流体室10の流体が背室13へ放出さ
れないように働くと同時に弁体5に開弁力となって働く
流体圧力を軽減乃至相殺するもので、その有効面積は二
つの圧力検出部材7,8の有効面積の差よりも充分小さ
く設計されている。The bellows 9 works to prevent the fluid in the pressure fluid chamber 10 from being released into the back chamber 13, and at the same time reduces or cancels out the fluid pressure that acts on the valve body 5 as a valve opening force. It is designed to be sufficiently smaller than the difference in effective area between members 7 and 8.
圧力流体が設定圧力よりも低いときは圧力流体室10と
通路室14とは同圧であり、第二の圧力検出部材8のみ
が圧力流体を開弁方向に受けているが、この開弁力に比
べてばね18の力が大きいので弁体5は弁座3に着座し
ている。When the pressure fluid is lower than the set pressure, the pressure fluid chamber 10 and passage chamber 14 are at the same pressure, and only the second pressure detection member 8 receives the pressure fluid in the valve opening direction, but this valve opening force Since the force of the spring 18 is greater than that of the valve body 5, the valve body 5 is seated on the valve seat 3.
圧力流体の圧力が設定圧力近くに上昇して第二の圧力検
出部材8に働く開弁力かばね荷重に打ち勝つようになる
と弁体5が弁座3から僅かに離れ、入口1から出口2へ
流体が放出されるようになる。When the pressure of the pressurized fluid rises close to the set pressure and overcomes the valve opening force or spring load acting on the second pressure detection member 8, the valve body 5 slightly separates from the valve seat 3, causing fluid to flow from the inlet 1 to the outlet 2. will be released.
このとき流量制御弁16で絞られた導入路17を通り通
路室14に入る圧力流体の流量よりも排出路15から入
口1を通り出口2へ放出される流量の方が多いので通路
室14の圧力が低下して圧力流体室10との間に圧力差
を生じ、第一の圧力検出部材7に開弁力が発生するよう
になる。At this time, the flow rate of the pressure fluid discharged from the discharge passage 15 through the inlet 1 to the outlet 2 is greater than the flow rate of the pressure fluid entering the passage chamber 14 through the introduction passage 17 throttled by the flow rate control valve 16. The pressure decreases, creating a pressure difference with the pressure fluid chamber 10, and a valve opening force is generated in the first pressure detection member 7.
第二の圧力検出部材8に開弁力として作用しているばね
18の荷重は一定であり、且つ第一の圧力検出部材7の
方が有効面積が大きいのでばね荷重に打ち勝って弁体5
を急速度で全開させるのである。The load of the spring 18 acting as a valve opening force on the second pressure detection member 8 is constant, and since the first pressure detection member 7 has a larger effective area, it overcomes the spring load and opens the valve body 5.
It opens at full speed.
このため、主弁12Bの背圧は一挙に放出され主弁12
Bは急速開弁して耐圧容器12Aの圧力流体を放出する
。Therefore, the back pressure of the main valve 12B is released all at once, and the main valve 12B
The valve B quickly opens to release the pressure fluid in the pressure vessel 12A.
主弁入口側の流体圧力が低下すると、圧力流体室10の
圧力も低下するので第一の圧力検出部材7の開弁力は小
さくなり、ばね18の力によって弁体5は閉弁方向へ動
作を開始し、ある開度lで閉じたとき排出路15から入
口1を経て出口2へ放出される流体の流量よりも導入路
17から通路室14に入る流量の方が多くなり、通路室
14の圧力が回復して圧力流体室10と通路室14との
圧力差が小さくなり、第一の圧力検出部材7が発生する
開弁力がきわめて小さくなることと流体圧力自身が低く
なっていることとが相俟ってばね18の力で急速度で一
挙に弁体5が弁座3に着座するに至るのである。When the fluid pressure on the main valve inlet side decreases, the pressure in the pressure fluid chamber 10 also decreases, so the valve opening force of the first pressure detection member 7 decreases, and the force of the spring 18 moves the valve body 5 in the valve closing direction. When the flow rate of fluid enters the passage chamber 14 from the introduction passage 17 is larger than the flow rate of the fluid discharged from the discharge passage 15 to the outlet 2 via the inlet 1, The pressure is restored and the pressure difference between the pressure fluid chamber 10 and the passage chamber 14 becomes small, and the valve opening force generated by the first pressure detection member 7 becomes extremely small, and the fluid pressure itself becomes low. Together, the force of the spring 18 causes the valve body 5 to be seated on the valve seat 3 at a rapid speed.
第3図および第4図は従来のパイロット弁ネ・よび本案
のパイロット弁を使用して主弁入口側の流体圧力P1
ど主弁の背圧P3を測定したそれぞれの結果を表わすグ
ラフであって、第4図においてPlが設定圧力PIAに
達してパイロット弁が開いたときP3 は最低圧力43
8寸で低下し、次にP□が低下してパイロット弁が閉じ
たときP3はP3Cから主弁入口側の流体圧力p1Dt
で回復する。Figures 3 and 4 show the fluid pressure P1 on the main valve inlet side using the conventional pilot valve and the pilot valve of the present invention.
4 is a graph showing the results of measuring the back pressure P3 of the main valve. In FIG. 4, when Pl reaches the set pressure PIA and the pilot valve opens, P3 is the lowest pressure 43.
When P□ decreases and the pilot valve closes, P3 changes from P3C to fluid pressure p1Dt on the main valve inlet side.
to recover.
第5図の従来品に就いて先に説明したPla−+P3.
。Regarding the conventional product shown in FIG. 5, the Pla-+P3.
.
P3b−+PICの圧力変化に比べ本案品によるPIA
→P3B、P3cm+PIDの圧力変化はきわめて短時
間で行われることがこれらのグラフから判り、本案に係
るパイロット弁は従来品に比べ高速度で開弁、閉弁する
ことが理解される。PIA due to this product compared to pressure change of P3b-+PIC
It can be seen from these graphs that the pressure changes of →P3B and P3cm+PID occur in a very short time, and it is understood that the pilot valve according to the present invention opens and closes at a higher speed than conventional products.
尚、圧力検出部材7,8はベローズ筐たはピストンで構
成し、或いはベローズ9の代りの適当な軸封装置を用い
て弁棒6の圧力流体室10と背室13との貫通個所を遮
断させてもよく、更に流量制御弁16に附設した逆止弁
は圧力流体が常に大気圧以上である流体系の場合には不
要である。The pressure detection members 7 and 8 may be constructed of a bellows housing or a piston, or a suitable shaft sealing device may be used in place of the bellows 9 to block the passage between the pressure fluid chamber 10 and the back chamber 13 of the valve stem 6. Furthermore, the check valve attached to the flow rate control valve 16 is not necessary in the case of a fluid system in which the pressure fluid is always at or above atmospheric pressure.
以上の説明から明らかなように、本案は弁開閉方向へ可
動にして有効面積が異なる二つの圧力検出部材を弁体に
取付け、これらの間の通路室に制御目的の圧力流体を流
量制御弁で調整して導入すると共にこの圧力流体を弁体
の入口側渣たは出口側へ排出するようにし、また有効面
積が大きい方の第一の圧力検出部材の通路室と反対側に
開弁方向へ働く圧力流体を常時作用させると共に、有効
面積が小さい方の第二の圧力検出部材に閉弁方向へ働く
ばねを作用させ、圧力流体の圧力が上昇したとき通路室
の圧力を低下させて第一の圧力検出部材に大きな開弁力
を発生させ弁体を急速度で一挙に開かせることができ、
また圧力流体の圧力が低下したときは第一の圧力検出部
材が発生する開弁力を小さくして第二の圧力検出部材に
働くばねの力で一挙に閉弁できるのである。As is clear from the above explanation, the present invention involves attaching two pressure detection members that are movable in the valve opening and closing directions and having different effective areas to the valve body, and supplying the pressure fluid for control purposes to the passage chamber between them using a flow rate control valve. The pressure fluid is adjusted and introduced, and the pressure fluid is discharged to the inlet side or outlet side of the valve body, and also to the side opposite to the passage chamber of the first pressure detection member having a larger effective area in the valve opening direction. In addition to applying the working pressure fluid at all times, a spring acting in the valve closing direction is applied to the second pressure detection member having a smaller effective area, and when the pressure of the pressure fluid increases, the pressure in the passage chamber is reduced and the first pressure detection member is activated. It is possible to generate a large valve opening force in the pressure detection member of the valve and open the valve body all at once at a rapid speed.
Furthermore, when the pressure of the pressure fluid decreases, the valve opening force generated by the first pressure detection member is reduced, and the valve can be closed all at once by the force of the spring acting on the second pressure detection member.
即ち、本案によると、二つの圧力検出部材に開弁作用と
閉弁作用とを分担させたので急開、急閉を確実に行い、
従って本案のパイロット弁自身はもとより主弁も急開、
急閉してチャタリングの心配なく安定した動作をするこ
とができるのである。That is, according to the present invention, the two pressure detection members share the valve opening action and the valve closing action, so that sudden opening and closing can be performed reliably.
Therefore, not only the pilot valve itself but also the main valve open suddenly.
This allows stable operation without the worry of sudden closing and chattering.
オた、流量制御弁の開度を調整することによって、弁開
閉作動圧を任意に且つ精密に調整でき、取扱う圧力流体
の種類、使用場所に応じ最適の作動圧に設定できるもの
である。Additionally, by adjusting the opening degree of the flow control valve, the valve opening/closing operating pressure can be arbitrarily and precisely adjusted, and the optimum operating pressure can be set depending on the type of pressure fluid to be handled and the place of use.
第1図は本案の実施例を示す縦断面図、第2図は流量制
御弁の異なる実施例を示す縦断面図、第3図お・よび第
4図は従来品および本案品の性能試験の結果を示すグラ
フ、第5図は従来品の→0を示す縦断面図である。
1・・・・・・入口、2・・・・・・出口、3・・・・
・・弁座、4・・・・・・弁本体、5・・・・・・弁体
、7,8・・・・・・圧力検出部材、10・・・・・・
圧力流体室、14・・・・・・通路室、15・・・・・
・排出路、16・・・・・・流量制御弁、17・・・・
・・導入路、18・・・・・・ばね。Fig. 1 is a longitudinal sectional view showing an embodiment of the present invention, Fig. 2 is a longitudinal sectional view showing different embodiments of the flow control valve, and Figs. 3 and 4 are performance tests of the conventional product and the proposed product. The graph showing the results, FIG. 5, is a vertical cross-sectional view showing →0 of the conventional product. 1...Entrance, 2...Exit, 3...
...Valve seat, 4... Valve body, 5... Valve body, 7, 8... Pressure detection member, 10...
Pressure fluid chamber, 14... Passage chamber, 15...
・Discharge path, 16...Flow rate control valve, 17...
...Introduction path, 18... Spring.
Claims (1)
と前記流体の出口2とを有する弁本体4;前記弁座3に
着座し或いはこれから離間する弁体5; 前記弁体5に増付けられ弁開閉方向へ可動にして有効面
積が異なる二つの圧力検出部材7,8;前記二つの圧力
検出部材7,8の間に形成され主弁入口側の流体の導入
路17および前記入口1へ開墨する排出路15が接続さ
れた通路室14:前記導入路17に設けられた調整可能
な流量制御弁16; 有効面積が大きい方の第一の前記圧力検出部材7を挾ん
で前記通路室14と反対側に設けられ主弁入口側の流体
が常時導入されて開弁方向へ作用する圧力流体室10; 有効面積が小さい方の第二の前記圧力検出部材8に作用
させた閉弁方向へ働くばね18;を具えてなる高圧作動
パイロット弁。[Claims for Utility Model Registration] Fluid inlet 1 connected to the back pressure chamber of the main valve and valve seat 3
and a valve body 4 having an outlet 2 for the fluid; a valve body 5 seated on the valve seat 3 or separated therefrom; two pressures added to the valve body 5 and movable in the valve opening/closing direction and having different effective areas; Detection members 7, 8; passage chamber 14 formed between the two pressure detection members 7, 8 and connected to a fluid introduction path 17 on the main valve inlet side and a discharge path 15 that opens to the inlet 1; An adjustable flow rate control valve 16 provided in the introduction passage 17; provided on the opposite side of the passage chamber 14 with the first pressure detection member 7 having a larger effective area in between, so that the fluid on the main valve inlet side is always supplied. A high pressure operating pilot valve comprising: a pressure fluid chamber 10 that is introduced and acts in the valve opening direction; and a spring 18 that acts in the valve closing direction and acts on the second pressure detection member 8 having a smaller effective area.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1977142680U JPS5847334Y2 (en) | 1977-10-24 | 1977-10-24 | High pressure operated pilot valve |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1977142680U JPS5847334Y2 (en) | 1977-10-24 | 1977-10-24 | High pressure operated pilot valve |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5468232U JPS5468232U (en) | 1979-05-15 |
JPS5847334Y2 true JPS5847334Y2 (en) | 1983-10-28 |
Family
ID=29119646
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1977142680U Expired JPS5847334Y2 (en) | 1977-10-24 | 1977-10-24 | High pressure operated pilot valve |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5847334Y2 (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5064633A (en) * | 1973-10-11 | 1975-05-31 | ||
JPS5097733A (en) * | 1974-01-07 | 1975-08-04 |
-
1977
- 1977-10-24 JP JP1977142680U patent/JPS5847334Y2/en not_active Expired
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5064633A (en) * | 1973-10-11 | 1975-05-31 | ||
JPS5097733A (en) * | 1974-01-07 | 1975-08-04 |
Also Published As
Publication number | Publication date |
---|---|
JPS5468232U (en) | 1979-05-15 |
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