JP4080062B2 - Valve device - Google Patents

Valve device Download PDF

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Publication number
JP4080062B2
JP4080062B2 JP15745498A JP15745498A JP4080062B2 JP 4080062 B2 JP4080062 B2 JP 4080062B2 JP 15745498 A JP15745498 A JP 15745498A JP 15745498 A JP15745498 A JP 15745498A JP 4080062 B2 JP4080062 B2 JP 4080062B2
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Japan
Prior art keywords
valve body
fluid
valve
pressure side
chamber
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JP15745498A
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Japanese (ja)
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JPH11351445A (en
Inventor
紀彦 山内
智文 大橋
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日電工業株式会社
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  • Sliding Valves (AREA)
  • Taps Or Cocks (AREA)
  • Mechanically-Actuated Valves (AREA)
  • Multiple-Way Valves (AREA)

Description

【0001】
【発明の属する技術分野】
本発明は、例えば4方弁のような流体の方向制御などに用いられる弁装置に関する。
【0002】
【従来の技術】
図4に示されるように、四方に流体口1を持つ弁本体2の内部に、内部切換通路3を有する角形の弁体4が回動自在に設けられ、この弁体4の周囲に可動弁座5およびこの可動弁座5を保持したホルダ6が径方向へ移動可能に設けられ、ホルダ6と弁本体2との間に板ばね7が設けられ、この板ばね7により可動弁座5が弁体4の周面に常時押圧された弁装置がある。
【0003】
この従来の弁装置は、弁体4と可動弁座5とが常時接触しており、角形の弁体4がその回動軸8に接続された電動モータにより回動されたときに、弁体4から可動弁座5に作用する力は、板ばね7により吸収している。
【0004】
【発明が解決しようとする課題】
この従来の弁装置は、板ばね7により可動弁座5が弁体4に常時接触しているため、この弁体4を回動するには大きな力(トルク)を必要とし、電動モータも大形のものが必要となる。
【0005】
本発明は、このような点に鑑みなされたもので、弁本体内に設けられた弁体が動くときの接触抵抗をなくし、弁体が小さな力でも円滑に作動できる弁装置を提供することを目的とする。
【0006】
【課題を解決するための手段】
請求項1に記載された発明は、内部に加圧流体の供給を受ける高圧側の室を備えた弁本体と、弁本体の高圧側の室内に回動自在に設けられ内部に低圧側の通路を備えた弁体と、弁体にて弁本体の内面に対し移動する部分に設けられ低圧側の通路の一端部が開口されたシリンダ部と、シリンダ部に嵌合され弁本体の内面に接離自在の可動シール体と、シリンダ部内の流体圧を制御して可動シール体を弁本体に接離させる制御手段とを具備し、弁本体は、内部に加圧流体の供給を受ける高圧側の室が角形断面形状に形成された角筒状部材と、高圧側の室に常時連通された流体供給口と、角筒状部材の隣接する二つの平板部に開口され弁体の回動により対向した可動シール体といずれか一方が選択的に連通されるとともに他方が角筒状部材内の高圧側の室を経て流体供給口に選択的に連通される二つの流体出入口と、弁体の回動中心と同心状に設けられ弁体内の低圧側の通路の他端部に常時連通された流体排出口とを備えた弁装置である。
【0007】
そして、弁体を決められた位置で停止させたときは、制御手段により流体圧を制御して可動シール体を弁本体に密接させ、また、弁体を動かすときは、制御手段によりシリンダ部内の流体圧を制御して可動シール体を弁本体から離間させることにより、弁体作動時の接触抵抗をなくす。さらに、弁体の可動シール体が一方の流体出入口と連通する位置にあるときは、弁本体の流体供給口が他方の流体出入口に連通するとともに、一方の流体出入口が弁体内の通路を経て流体排出口に連通し、また、弁体が作動して、弁体の可動シール体が他方の流体出入口と連通する位置にあるときは、弁本体の流体供給口が一方の流体出入口に連通するとともに、他方の流体出入口が弁体内の通路を経て流体排出口に連通する。
【0008】
請求項2に記載された発明は、請求項1記載の弁装置における制御手段が、シリンダ部から可動シール体を突出させる方向に付勢するスプリングと、弁本体内に設けられた高圧側の室からシリンダ部内への流体供給とシリンダ部内から弁体内に設けられた低圧側の通路への流体排出とを切換える切換手段とを具備したものである。
【0009】
そして、切換手段により、高圧側の室にある流体をシリンダ部内へ供給するように切換えることにより、可動シール体に作用する流体圧をバランスさせるとともにスプリングの付勢圧で可動シール体をシリンダ部内から押出すようにして弁本体に密接させ、また、シリンダ部内にある流体を低圧側の通路へ排出可能とすることにより、高圧側の室にある流体圧で可動シール体をシリンダ部内へ押戻すようにして弁本体から離間させる。
【0010】
求項に記載された発明は、請求項2記載の弁装置における切換手段が、高圧側の室からシリンダ部内へ流体を供給する一方の通孔中に設けられたオリフィスと、シリンダ部内から低圧側の通路へ流体を排出する他方の通孔中に設けられこの他方の通孔を開閉する開閉弁とを具備したものである。
【0011】
そして、弁体を停止させたときは、開閉弁により他方の通孔を閉じることにより、高圧側の室から一方の通孔中のオリフィスを経てシリンダ部内へ流体を供給して、可動シール体をシリンダ部内から押出す。弁体を動かすときは、開閉弁により他方の通孔を開くことにより、シリンダ部内からこの他方の通孔を経て低圧側の通路へ流体を排出させて、可動シール体をシリンダ部内に押戻す。
【0012】
請求項に記載された発明は、請求項記載の弁装置における開閉弁を、通電により通孔を開くとともに通電停止により通孔を閉じる電磁作動弁としたものである。
【0013】
そして、停電発生時は通孔を閉じた状態が維持されるから、可動シール体によるシール状態を自動的に保てる。
【0014】
【発明の実施の形態】
以下、本発明を、図1乃至図3に示される実施の一形態を参照しながら説明する。
【0015】
図1および図2に示されるように、11は角筒状部材11a と角板部材11b とをOリング11c を介してボルト11d (図3)により一体化した弁本体であり、この弁本体11の内部に、加圧流体の供給を受ける高圧側の室12が、図2に示される角形断面形状に形成されている。
【0016】
この弁本体11内に、図1に示されるように弁体13の上部および下部に形成された円柱部14が、Oリング15を介して回動自在に嵌合されている。この弁体13にて、上部および下部の円柱部14間から一側方にシリンダ部16が突設されている。
【0017】
この弁体13のシリンダ部16は、図2に示されるように弁本体11の内面に対向して移動する部分であり、このシリンダ部16内には円環状のシリンダ室17が形成され、このシリンダ室17にほぼ円筒状の可動シール体18が嵌合されている。
【0018】
この可動シール体18は、ほぼ円筒形の本体部21と、この本体部21の内端側の内周溝および外周溝にそれぞれ嵌着されてシリンダ室17内で摺動するOリング22と、本体部21の外端側の凹溝にOリング23を介して嵌着され弁本体11の内面に密着されるフランジ形の当接部24と、この当接部24を係止する係止輪25と、本体部21の外周面から一体に突設されたフランジ形のスプリング係止部26とを有している。
【0019】
この可動シール体18に対して、シリンダ室17の流体圧を制御して可動シール体18を弁本体11に接離させる制御手段27が設けられている。
【0020】
この制御手段27は、図1に示されるように可動シール体18のスプリング係止部26と弁体13との間に、シリンダ部16から可動シール体18を突出させる方向に付勢する圧縮コイルスプリング28が介在され、また、弁体13内および弁体13に対して切換手段29が設けられたものである。
【0021】
この切換手段29は、高圧側の室12からシリンダ部16内のシリンダ室17への流体供給と、シリンダ室17から弁体13内に設けられた低圧側の通路31への流体排出とを切換えるものである。この低圧側の通路31の一端部に前記可動シール体18が設けられている。
【0022】
前記弁本体11には、高圧側の室12に常時連通された流体供給口32と、弁体13の作動により可動シール体18と選択的に連通される二つの流体出入口33,34と、低圧側の通路31の他端部に常時連通された流体排出口35とが開口されている。要するに4方弁の構造となっている。
【0023】
前記弁体13には、回動軸部36が一体に設けられ、弁体13には弁本体11内の高圧側の室12に臨む径方向の通孔37と、シリンダ室17に連通する径方向の通孔38とが穿設され、さらに、これらの通孔37,38と回動軸部36の上部内に形成された弁室39とを連通する軸方向の通孔41が穿設され、また弁室39と前記弁体13内の低圧側の通路31とを連通する軸方向の通孔42が穿設されている。この通孔42の上端部には、弁座部43が形成され弁室39に突設されている。
【0024】
前記切換手段29は、高圧側の室12からシリンダ室17へ流体を供給する一方の通孔37中にオリフィス44が設けられ、シリンダ室17から低圧側の通路31へ流体を排出する他方の通孔41,42中に、この他方の通孔41,42を開閉する開閉弁としての電磁作動弁45が設けられたものである。
【0025】
この電磁作動弁45は、弁体13の回動軸部36の軸端部に円筒形のガイド46が同心状に嵌着され、このガイド46の内部に可動鉄心(プランジャ)47が摺動自在に嵌合され、またガイド46を介して固定鉄心48が固定され、この固定鉄心48の内側に設けられた圧縮コイルスプリング49により可動鉄心47が前記弁座部43側へ付勢され、可動鉄心47の先端部に一体に嵌着された弁体部51が前記弁座部43に接離自在に押圧されている。ガイド46の外周側には電磁コイル部(ソレノイド)52が嵌着されている。
【0026】
そして、この電磁作動弁45は、通電により電磁コイル部52が励磁されると、可動鉄心47が固定鉄心48に吸着されて弁体部51が弁座部43から離れ、通孔41,42間が開き、また、通電停止により電磁コイル部52が消磁されると、可動鉄心47が圧縮コイルスプリング49の復元力により固定鉄心48から離れるとともに、弁体部51が弁座部43に密接し、通孔41,42間を閉じる。
【0027】
図1および図3に示されるように、前記弁体13の回動軸部36にはウォームホイール53が一体的に嵌着され、このウォームホイール53と噛合うウォームギア54が、弁本体11の上面に設置された電動モータ55の回転軸56に一体的に取付けられている。
【0028】
ウォームホイール53のボス部には2箇所に凹溝57,58が設けられ、また、弁本体11の上面には、ウォームホイール53の凹溝57,58を検出するリミットスイッチ59,60が設置されている。
【0029】
これらのリミットスイッチ59,60により弁体13の回動角を制御し、可動シール体18が一方の流体出入口33と合致する回動角か、または他方の流体出入口34と合致する回動角で弁体13が回動停止するように電動モータ55を制御する。
【0030】
次に、図1乃至図3に示された実施形態の作用を説明する。
【0031】
図1に示されるように、弁体13を停止させたときは、切換手段29の電磁作動弁45への通電を停止して、電磁作動弁45の圧縮コイルスプリング49により弁体部51を弁座部43に密接させて通孔41,42間を閉じることにより、高圧側の室12から一方の通孔37中のオリフィス44を経てシリンダ室17へ加圧流体を供給し、可動シール体18をシリンダ室17から押出す。
【0032】
すなわち、切換手段29により、高圧側の室12にある加圧流体をシリンダ室17へ供給するように切換えることにより、可動シール体18の一端面および他端面に作用する流体圧はバランスするが、圧縮コイルスプリング28の付勢圧により可動シール体18はシリンダ室17から押出され、弁本体11における流体出入口33の周縁部と密接する。
【0033】
一方、図2に示されるように、弁体13を回動するときは、切換手段29の電磁作動弁45に通電して、弁体部51を弁座部43より後退させて通孔41,42間を開くことにより、シリンダ室17内の流体を通孔41,42を経て低圧側の通路31へ排出可能に切換えることにより、可動シール体18の係止輪25側の端面に作用する高圧側の室12内の流体圧が可動シール体18を圧縮コイルスプリング28に抗してシリンダ室17に押戻し、可動シール体18を弁本体11の内壁から離間させる。
【0034】
このとき、高圧側の室12にある加圧流体がシリンダ室17へ作用する働きは、オリフィス44により制限され、シリンダ室17の流体を通孔41,42により低圧側の通路31へ排出する作用の方が強く現れる。
【0035】
このようにして、弁体13の可動シール体18を、決められた流体出入口33または流体出入口34の周縁部で停止させたときは、切換手段29によりシリンダ室17の流体圧を室12の内圧と等圧に制御して、圧縮コイルスプリング28により可動シール体18を弁本体11に密接させることができ、また、このシール状態で停電事故などが発生しても、電磁作動弁45の弁体部51により通孔41,42間を閉じた状態が維持されるので、可動シール体18によるシール状態を自動的に保てる。
【0036】
一方、弁体13を動かすときは、切換手段29によりシリンダ室17の流体圧を室12の内圧より低圧に制御して、その圧力不均衡により圧縮コイルスプリング28に抗して可動シール体18を弁本体11から離間させることにより、弁体13の作動時の接触抵抗をなくすことができる。
【0037】
図2において弁体13a で示されるように、弁体13の可動シール体18が一方の流体出入口33と連通する位置にあるときは、弁本体11の流体供給口32が室12を経て他方の流体出入口34に連通するとともに、一方の流体出入口33が弁体13内の通路31を経て流体排出口35に連通するから、ポンプ(図示せず)の吐出口などから弁本体11の流体供給口32に供給された加圧流体は、室12内を経て流体出入口34より外部の管路(図示せず)へ吐出され、外部の管路より流体出入口33に戻された流体は、弁体13内の通路31を経て流体排出口35よりポンプの吸込口などへ循環される。
【0038】
また、図2において弁体13b で示されるように、弁体13が90°回動して、弁体13の可動シール体18が他方の流体出入口34と連通する位置にあるときは、弁本体11の流体供給口32が室12を経て一方の流体出入口33に連通するとともに、他方の流体出入口34が弁体13内の通路31を経て流体排出口35に連通するから、ポンプ(図示せず)の吐出口などから弁本体11の流体供給口32に供給された加圧流体は、室12内を経て流体出入口33より外部の管路(図示せず)へ吐出し、外部の管路より流体出入口34へ戻された流体は、弁体13内の通路31を経て流体排出口35よりポンプの吸込口などへ循環される。すなわち、外部の管路での流れ方向が逆になる。
【0039】
【発明の効果】
請求項1記載の発明によれば、弁体を動かすときは、制御手段により弁体の可動シール体を弁本体から離間させることにより接触抵抗をなくすから、弁体を円滑に作動するための力(トルク)を軽減でき、駆動部の小形化につながるとともに、可動シール体の摩耗を防止できる。また、弁体を停止させたときは、制御手段により可動シール体を弁本体に密接させるから、確実な液密または気密を保持できる。さらに、通路および可動シール体を備えた弁体と、流体供給口、二つの流体出入口および流体排出口を備えた弁本体とにより、4ポート2位置切換弁いわゆる4方弁に適用できる。
【0040】
請求項2記載の発明によれば、弁装置が扱う流体の一部を利用して、すなわち切換手段により切換可能の流体圧と、スプリングの付勢圧とを用いて可動シール体を動かすから、可動シール体を動かすための流体圧を外部から供給する必要がない。
【0041】
求項記載の発明によれば、開閉機能しか持たない開閉弁をオリフィスと組合せることにより、シリンダ部内への流体供給とシリンダ部内からの流体排出とを切換える切換手段を簡単に形成できる。
【0042】
請求項記載の発明によれば、開閉弁が、通電により通孔を開くとともに通電停止により通孔を閉じる電磁作動弁であるから、停電発生時は通孔を閉じた状態を維持でき、可動シール体によるシール状態を自動的に保てる。
【図面の簡単な説明】
【図1】 本発明に係る弁装置の実施の一形態を示す軸方向の断面図である。
【図2】 同上弁装置の径方向の断面図である。
【図3】 同上弁装置の平面図である。
【図4】 従来の弁装置を示す断面図である。
【符号の説明】
11 弁本体
12 室
13 弁体
16 シリンダ部
18 可動シール体
27 制御手段
28 スプリング
29 切換手段
31 通路
32 流体供給口
33,34 流体出入口
35 流体排出口
44 オリフィス
45 開閉弁としての電磁作動弁
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a valve device used for fluid direction control such as a four-way valve.
[0002]
[Prior art]
As shown in FIG. 4, a rectangular valve body 4 having an internal switching passage 3 is rotatably provided inside a valve main body 2 having fluid ports 1 on four sides, and a movable valve is provided around the valve body 4. A seat 5 and a holder 6 holding the movable valve seat 5 are provided so as to be movable in the radial direction. A leaf spring 7 is provided between the holder 6 and the valve body 2, and the leaf spring 7 allows the movable valve seat 5 to be moved. There is a valve device that is constantly pressed on the peripheral surface of the valve body 4.
[0003]
In this conventional valve device, the valve body 4 and the movable valve seat 5 are always in contact with each other, and when the rectangular valve body 4 is rotated by an electric motor connected to the rotating shaft 8, the valve body The force acting on the movable valve seat 5 from 4 is absorbed by the leaf spring 7.
[0004]
[Problems to be solved by the invention]
In this conventional valve device, since the movable valve seat 5 is always in contact with the valve body 4 by the leaf spring 7, a large force (torque) is required to rotate the valve body 4, and the electric motor is also large. A shape is needed.
[0005]
The present invention has been made in view of the above points, and provides a valve device that eliminates contact resistance when a valve body provided in a valve body moves and can smoothly operate even with a small force. Objective.
[0006]
[Means for Solving the Problems]
The invention described in claim 1, a valve body with a high-pressure side of the chamber for receiving a supply of the internal pressurized fluid, inside the low pressure side is provided rotatably in the chamber of the high pressure side of the valve body A valve body provided with a passage, a cylinder portion provided at a portion of the valve body that moves with respect to the inner surface of the valve body, and one end portion of the passage on the low-pressure side being opened; A movable seal body that can be freely contacted and separated, and a control means for controlling the fluid pressure in the cylinder part to contact and separate the movable seal body from the valve body , the valve body having a pressurized fluid supplied therein Is formed in a rectangular tube-shaped member having a square cross-sectional shape, a fluid supply port always in communication with the high-pressure side chamber, and is opened by two flat plate portions adjacent to the rectangular tube-shaped member. Either one of the opposed movable seal bodies is selectively communicated with the other, and the other is a high pressure in the rectangular tube-shaped member. Two fluid inlets / outlets selectively communicated with the fluid supply port through the chamber, and a fluid exhaust provided at the other end of the low pressure side passage provided concentrically with the rotation center of the valve body. And a valve device having an outlet .
[0007]
When the valve body is stopped at a predetermined position, the fluid pressure is controlled by the control means so that the movable seal body is brought into close contact with the valve body, and when the valve body is moved, the control means is provided in the cylinder portion. By controlling the fluid pressure to separate the movable seal body from the valve body, the contact resistance during operation of the valve body is eliminated. Further, when the movable seal body of the valve body is in a position communicating with one fluid inlet / outlet, the fluid supply port of the valve main body communicates with the other fluid inlet / outlet, and the one fluid inlet / outlet passes through the passage in the valve body. When the valve body operates and the movable seal body of the valve body is in a position communicating with the other fluid inlet / outlet, the fluid supply port of the valve body communicates with one fluid inlet / outlet. The other fluid inlet / outlet communicates with the fluid outlet through a passage in the valve body.
[0008]
According to a second aspect of the present invention, the control means in the valve device according to the first aspect is provided with a spring that urges the movable seal body in a direction to protrude from the cylinder portion, and a high-pressure side chamber provided in the valve body. And a switching means for switching between fluid supply from the cylinder to the cylinder and fluid discharge from the cylinder to the low-pressure side passage provided in the valve body.
[0009]
Then, the switching means switches the fluid in the high-pressure side chamber to be supplied into the cylinder portion, thereby balancing the fluid pressure acting on the movable seal body and bringing the movable seal body from the cylinder portion by the biasing pressure of the spring. The movable seal body is pushed back into the cylinder portion by the fluid pressure in the high pressure side chamber by allowing the fluid in the cylinder portion to be discharged into the low pressure side passage by being pushed close to the valve body. And away from the valve body.
[0010]
Motomeko invention described in 3, switching means in the valve device according to claim 2 Symbol placement has an orifice provided in one of the holes supplying fluid from the chamber of the high pressure side to the cylinder portion, the cylinder portion And an open / close valve provided in the other through hole for discharging the fluid from the low pressure side passage to open and close the other through hole.
[0011]
When the valve body is stopped, the other through hole is closed by the on-off valve, so that the fluid is supplied from the high pressure side chamber to the cylinder portion through the orifice in the one through hole, and the movable seal body is Extrude from inside the cylinder. When the valve body is moved, the other through-hole is opened by the on-off valve, so that the fluid is discharged from the cylinder portion through the other through-hole to the low-pressure side passage, and the movable seal body is pushed back into the cylinder portion.
[0012]
According to a fourth aspect of the present invention, the on-off valve in the valve device according to the third aspect is an electromagnetically operated valve that opens the through hole by energization and closes the through hole by stopping energization.
[0013]
And since the state which closed the through-hole is maintained at the time of a power failure occurrence, the sealing state by a movable seal body can be maintained automatically.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
The present invention will be described below with reference to an embodiment shown in FIGS.
[0015]
As shown in FIG. 1 and FIG. 2, reference numeral 11 denotes a valve body in which a rectangular tubular member 11a and a square plate member 11b are integrated by an bolt 11d (FIG. 3) via an O-ring 11c. The high-pressure chamber 12 for receiving the supply of pressurized fluid is formed in a rectangular cross-sectional shape shown in FIG.
[0016]
As shown in FIG. 1, a cylindrical portion 14 formed on the upper and lower portions of the valve body 13 is fitted in the valve body 11 via an O-ring 15 so as to be rotatable. In the valve body 13, a cylinder portion 16 protrudes from one side of the upper and lower cylindrical portions 14.
[0017]
As shown in FIG. 2, the cylinder portion 16 of the valve body 13 is a portion that moves to face the inner surface of the valve body 11, and an annular cylinder chamber 17 is formed in the cylinder portion 16. A substantially cylindrical movable seal body 18 is fitted in the cylinder chamber 17.
[0018]
The movable seal body 18 includes a substantially cylindrical main body 21, an O-ring 22 that is fitted in an inner peripheral groove and an outer peripheral groove on the inner end side of the main body 21, and slides in the cylinder chamber 17. A flange-shaped contact portion 24 that is fitted in a concave groove on the outer end side of the main body portion 21 via an O-ring 23 and is in close contact with the inner surface of the valve body 11, and a locking ring that locks the contact portion 24 25 and a flange-shaped spring locking portion 26 integrally projecting from the outer peripheral surface of the main body portion 21.
[0019]
Control means 27 for controlling the fluid pressure in the cylinder chamber 17 to bring the movable seal body 18 into and out of contact with the valve body 11 is provided for the movable seal body 18.
[0020]
As shown in FIG. 1, this control means 27 is a compression coil that urges the movable seal body 18 from the cylinder portion 16 to protrude between the spring locking portion 26 and the valve body 13 of the movable seal body 18. A spring 28 is interposed, and a switching means 29 is provided in the valve body 13 and for the valve body 13.
[0021]
This switching means 29 switches between fluid supply from the high pressure side chamber 12 to the cylinder chamber 17 in the cylinder portion 16 and fluid discharge from the cylinder chamber 17 to the low pressure side passage 31 provided in the valve body 13. Is. The movable seal body 18 is provided at one end of the low pressure side passage 31.
[0022]
The valve body 11 includes a fluid supply port 32 that is always in communication with the chamber 12 on the high pressure side, two fluid inlets 33 and 34 that are selectively communicated with the movable seal body 18 by the operation of the valve body 13, and a low pressure A fluid discharge port 35 that is always in communication with the other end of the side passage 31 is opened. In short, it has a four-way valve structure.
[0023]
The valve body 13 is integrally provided with a rotating shaft portion 36. The valve body 13 has a radial through hole 37 facing the high pressure side chamber 12 in the valve body 11 and a diameter communicating with the cylinder chamber 17. A through hole 38 in the direction is formed, and further, an axial through hole 41 is formed to communicate these through holes 37 and 38 with the valve chamber 39 formed in the upper portion of the rotation shaft portion 36. Further, an axial through hole 42 is formed to communicate the valve chamber 39 and the low pressure side passage 31 in the valve body 13. A valve seat 43 is formed at the upper end of the through hole 42 and protrudes from the valve chamber 39.
[0024]
The switching means 29 is provided with an orifice 44 in one through hole 37 for supplying fluid from the high pressure side chamber 12 to the cylinder chamber 17, and the other passage for discharging the fluid from the cylinder chamber 17 to the low pressure side passage 31. In the holes 41 and 42, an electromagnetically operated valve 45 is provided as an on / off valve for opening and closing the other through hole 41 and 42.
[0025]
In this electromagnetically operated valve 45, a cylindrical guide 46 is fitted concentrically on the shaft end portion of the rotating shaft portion 36 of the valve body 13, and a movable iron core (plunger) 47 is slidable inside the guide 46. The fixed iron core 48 is fixed through the guide 46, and the movable iron core 47 is urged toward the valve seat 43 by the compression coil spring 49 provided inside the fixed iron core 48. A valve body 51 that is integrally fitted to the distal end portion of 47 is pressed against the valve seat portion 43 so as to be able to contact and separate. An electromagnetic coil portion (solenoid) 52 is fitted on the outer peripheral side of the guide 46.
[0026]
When the electromagnetic coil part 52 is energized by energization, the electromagnetically actuated valve 45 has the movable iron core 47 attracted to the fixed iron core 48 and the valve body part 51 is separated from the valve seat part 43, so that the through holes 41, 42 are When the electromagnetic coil portion 52 is demagnetized by stopping energization, the movable iron core 47 is separated from the fixed iron core 48 by the restoring force of the compression coil spring 49, and the valve body 51 is in close contact with the valve seat 43, Close between the through holes 41 and 42.
[0027]
As shown in FIGS. 1 and 3, a worm wheel 53 is integrally fitted to the rotation shaft portion 36 of the valve body 13, and the worm gear 54 meshing with the worm wheel 53 is connected to the upper surface of the valve body 11. Are integrally attached to a rotating shaft 56 of an electric motor 55 installed in the motor.
[0028]
The boss portion of the worm wheel 53 is provided with concave grooves 57, 58 at two locations, and limit switches 59, 60 for detecting the concave grooves 57, 58 of the worm wheel 53 are installed on the upper surface of the valve body 11. ing.
[0029]
The rotation angle of the valve body 13 is controlled by these limit switches 59 and 60, and the movable seal body 18 is rotated at a rotation angle that matches one fluid inlet / outlet 33 or at a rotation angle that matches the other fluid inlet / outlet 34. The electric motor 55 is controlled so that the valve body 13 stops rotating.
[0030]
Next, the operation of the embodiment shown in FIGS. 1 to 3 will be described.
[0031]
As shown in FIG. 1, when the valve body 13 is stopped, the energization to the electromagnetically operated valve 45 of the switching means 29 is stopped, and the valve body portion 51 is valved by the compression coil spring 49 of the electromagnetically operated valve 45. By closing the space between the through holes 41 and 42 in close contact with the seat 43, pressurized fluid is supplied from the high pressure side chamber 12 to the cylinder chamber 17 through the orifice 44 in one through hole 37, and the movable seal body 18 Is extruded from the cylinder chamber 17.
[0032]
That is, by switching so that the pressurized fluid in the high pressure side chamber 12 is supplied to the cylinder chamber 17 by the switching means 29, the fluid pressure acting on the one end surface and the other end surface of the movable seal body 18 is balanced, The movable seal body 18 is pushed out of the cylinder chamber 17 by the urging pressure of the compression coil spring 28 and comes into close contact with the peripheral edge of the fluid inlet / outlet 33 in the valve body 11.
[0033]
On the other hand, as shown in FIG. 2, when the valve body 13 is rotated, the solenoid operating valve 45 of the switching means 29 is energized, and the valve body portion 51 is retracted from the valve seat portion 43 so that the through holes 41, By opening the gap 42, the high pressure acting on the end face of the movable seal body 18 on the side of the locking ring 25 is switched by switching the fluid in the cylinder chamber 17 through the holes 41, 42 to the low pressure side passage 31. The fluid pressure in the chamber 12 on the side pushes back the movable seal body 18 against the compression coil spring 28 to the cylinder chamber 17 and separates the movable seal body 18 from the inner wall of the valve body 11.
[0034]
At this time, the action of the pressurized fluid in the high pressure side chamber 12 acting on the cylinder chamber 17 is limited by the orifice 44, and the fluid in the cylinder chamber 17 is discharged to the low pressure side passage 31 through the holes 41 and 42. Appears more strongly.
[0035]
In this way, when the movable seal body 18 of the valve body 13 is stopped at the determined fluid inlet / outlet 33 or the peripheral edge of the fluid inlet / outlet 34, the fluid pressure in the cylinder chamber 17 is changed by the switching means 29 to the internal pressure in the chamber 12. The movable seal body 18 can be brought into close contact with the valve body 11 by the compression coil spring 28, and even if a power failure accident occurs in this seal state, the valve body of the electromagnetically operated valve 45 can be controlled. Since the state where the through holes 41 and 42 are closed by the portion 51 is maintained, the sealing state by the movable seal body 18 can be automatically maintained.
[0036]
On the other hand, when moving the valve body 13, the switching means 29 controls the fluid pressure in the cylinder chamber 17 to be lower than the internal pressure in the chamber 12, and the pressure imbalance causes the movable seal body 18 to resist the compression coil spring 28. By separating the valve body 11 from the valve body 11, the contact resistance when the valve body 13 is operated can be eliminated.
[0037]
As shown by the valve body 13 a in FIG. 2, when the movable seal body 18 of the valve body 13 is in a position communicating with one fluid inlet / outlet port 33, the fluid supply port 32 of the valve body 11 passes through the chamber 12 and the other Since the fluid inlet / outlet 33 communicates with the fluid outlet / inlet 34 and the fluid outlet / outlet 35 via the passage 31 in the valve body 13, the fluid supply port of the valve main body 11 is connected to the outlet of the pump (not shown). The pressurized fluid supplied to 32 passes through the chamber 12 and is discharged from the fluid inlet / outlet 34 to an external pipe (not shown), and the fluid returned from the external pipe to the fluid inlet / outlet 33 passes through the valve body 13. The fluid is circulated from the fluid discharge port 35 to the suction port of the pump through the internal passage 31.
[0038]
Further, as shown by a valve body 13b in FIG. 2, when the valve body 13 is rotated by 90 ° and the movable seal body 18 of the valve body 13 is in a position communicating with the other fluid inlet / outlet 34, the valve body 11 fluid supply port 32 communicates with one fluid inlet / outlet 33 via the chamber 12 and the other fluid inlet / outlet 34 communicates with the fluid outlet 35 via the passage 31 in the valve body 13. The pressurized fluid supplied from the discharge port etc. to the fluid supply port 32 of the valve body 11 passes through the chamber 12 and is discharged from the fluid inlet / outlet 33 to an external pipe (not shown) and from the external pipe The fluid returned to the fluid inlet / outlet 34 is circulated through the passage 31 in the valve body 13 from the fluid outlet 35 to the inlet of the pump. That is, the flow direction in the external pipe is reversed.
[0039]
【The invention's effect】
According to the first aspect of the present invention, when the valve body is moved, the contact resistance is eliminated by separating the movable seal body of the valve body from the valve body by the control means. Therefore, the force for smoothly operating the valve body (Torque) can be reduced, leading to downsizing of the drive unit and the wear of the movable seal body can be prevented. Further, when the valve body is stopped, the movable sealing body is brought into close contact with the valve body by the control means, so that reliable liquid tightness or air tightness can be maintained. Furthermore, the present invention can be applied to a so-called four-port two-position switching valve by a valve body having a passage and a movable seal body and a valve body having a fluid supply port, two fluid inlets and outlets.
[0040]
According to the invention of claim 2, since the movable seal body is moved by using a part of the fluid handled by the valve device, that is, by using the fluid pressure switchable by the switching means and the biasing pressure of the spring, There is no need to supply fluid pressure for moving the movable seal body from the outside.
[0041]
According to the invention Motomeko 3 wherein, by combining the opening and closing valves having only open and close functions as an orifice, easily form switching means for switching the fluid discharge from the fluid supply and the cylinder portion of the cylinder portion.
[0042]
According to the invention of claim 4 , since the on-off valve is an electromagnetically operated valve that opens the through-hole when energized and closes the through-hole when the energization is stopped, it can maintain a closed state when a power failure occurs, and is movable. The seal state by the seal body can be automatically maintained.
[Brief description of the drawings]
FIG. 1 is an axial cross-sectional view showing an embodiment of a valve device according to the present invention.
FIG. 2 is a radial sectional view of the valve device.
FIG. 3 is a plan view of the valve device.
FIG. 4 is a cross-sectional view showing a conventional valve device.
[Explanation of symbols]
11 Valve body
12 rooms
13 Disc
16 Cylinder part
18 Movable seal body
27 Control means
28 Spring
29 Switching means
31 Passage
32 Fluid supply port
33, 34 Fluid inlet / outlet
35 Fluid outlet
44 Orifice
45 Solenoid valve as on / off valve

Claims (4)

内部に加圧流体の供給を受ける高圧側の室を備えた弁本体と、
弁本体の高圧側の室内に回動自在に設けられ内部に低圧側の通路を備えた弁体と、
弁体にて弁本体の内面に対し移動する部分に設けられ低圧側の通路の一端部が開口されたシリンダ部と、
シリンダ部に嵌合され弁本体の内面に接離自在の可動シール体と、
シリンダ部内の流体圧を制御して可動シール体を弁本体に接離させる制御手段とを具備し
弁本体は、
内部に加圧流体の供給を受ける高圧側の室が角形断面形状に形成された角筒状部材と、
高圧側の室に常時連通された流体供給口と、
角筒状部材の隣接する二つの平板部に開口され弁体の回動により対向した可動シール体といずれか一方が選択的に連通されるとともに他方が角筒状部材内の高圧側の室を経て流体供給口に選択的に連通される二つの流体出入口と、
弁体の回動中心と同心状に設けられ弁体内の低圧側の通路の他端部に常時連通された流体排出口とを備えた
ことを特徴とする弁装置。
A valve body having a chamber on the high-pressure side that receives a supply of pressurized fluid therein ;
A valve body having a low pressure side of the passages therein arranged rotatably in the chamber of the high pressure side of the valve body,
A cylinder part that is provided in a portion that moves with respect to the inner surface of the valve body in the valve body, and in which one end part of the low-pressure side passage is opened ;
A movable seal body that is fitted to the cylinder portion and can be freely contacted and separated from the inner surface of the valve body;
A control means for controlling the fluid pressure in the cylinder part to bring the movable seal body into and out of contact with the valve body ,
The valve body
A rectangular tube-shaped member in which a chamber on the high-pressure side receiving a supply of pressurized fluid is formed in a square cross-sectional shape;
A fluid supply port always in communication with the high-pressure chamber;
One of the movable seal bodies opened to two adjacent flat plate portions of the rectangular tubular member and opposed to each other by the rotation of the valve body is selectively communicated, and the other is a high-pressure side chamber in the rectangular tubular member. Two fluid inlets and outlets selectively communicated with the fluid supply port,
A valve device comprising: a fluid discharge port provided concentrically with the center of rotation of the valve body and always communicating with the other end of the low-pressure side passage in the valve body .
制御手段は、
シリンダ部から可動シール体を突出させる方向に付勢するスプリングと、
弁本体内に設けられた高圧側の室からシリンダ部内への流体供給とシリンダ部内から弁体内に設けられた低圧側の通路への流体排出とを切換える切換手段と
を具備したことを特徴とする請求項1記載の弁装置。
The control means
A spring that urges the movable seal body in a direction to protrude from the cylinder portion;
And switching means for switching between supply of fluid from the high pressure side chamber provided in the valve body to the cylinder portion and discharge of fluid from the cylinder portion to the low pressure side passage provided in the valve body. The valve device according to claim 1.
切換手段は、
高圧側の室からシリンダ部内へ流体を供給する一方の通孔中に設けられたオリフィスと、
シリンダ部内から低圧側の通路へ流体を排出する他方の通孔中に設けられこの他方の通孔を開閉する開閉弁と
を具備したことを特徴とする請求項2記載の弁装置。
The switching means is
An orifice provided in one through hole for supplying fluid from the high-pressure side chamber into the cylinder portion;
Other provided in the through hole, characterized by comprising a closing valve for opening and closing the other of the through hole according to claim 2 Symbol mounting of the valve device for discharging the fluid to the low pressure side of the passage from the cylinder unit.
開閉弁は、通電により通孔を開くとともに通電停止により通孔を閉じる電磁作動弁であることを特徴とする請求項記載の弁装置。4. The valve device according to claim 3 , wherein the on-off valve is an electromagnetically operated valve that opens the through hole when energized and closes the through hole when the energization is stopped.
JP15745498A 1998-06-05 1998-06-05 Valve device Expired - Fee Related JP4080062B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15745498A JP4080062B2 (en) 1998-06-05 1998-06-05 Valve device

Publications (2)

Publication Number Publication Date
JPH11351445A JPH11351445A (en) 1999-12-24
JP4080062B2 true JP4080062B2 (en) 2008-04-23

Family

ID=15650020

Family Applications (1)

Application Number Title Priority Date Filing Date
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Country Link
JP (1) JP4080062B2 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102269161B (en) * 2011-04-22 2012-11-14 三一重工股份有限公司 Pumping mechanism and distribution valve thereof, and concrete pumping machine
CN102410201B (en) * 2011-09-21 2015-04-08 三一汽车制造有限公司 Distribution valve, pumping mechanism and concrete pumping device
CN103398194B (en) * 2013-08-02 2015-08-05 永康市华港厨具配件有限公司 Four sections of power general mood synchronous control valves

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