JPS643885Y2 - - Google Patents

Description

【考案の詳細な説明】 本考案は、コイルに流れる電流を調整すること
により流体の流量調整を行うことができる比例電
磁弁に関する。より詳細には、固定鉄心と、該固
定鉄心を励磁するコイルと、固定鉄心の下方でガ
イドパイプに上下摺動自在に嵌装されたプランジ
ヤと、該プランジヤの下方の所定位置に配置され
た弁口を有する弁座と、プランジヤの下端面のシ
ール部材を弁座に圧接させるべく該プランジヤを
下方へ付勢するばね部材とを備え、コイルに電流
を流しプランジヤをばね部材に抗して固定鉄心で
吸引することにより弁口を開くことができるとと
もに、コイルに流れる電流を調整して固定鉄心の
吸引力を変えシール部材と弁口の間の間隙を調整
することにより、絞り量を調整できる比例電磁弁
に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a proportional solenoid valve that can adjust the flow rate of fluid by adjusting the current flowing through a coil. More specifically, it includes a fixed core, a coil that excites the fixed core, a plunger fitted into a guide pipe below the fixed core so as to be slidable up and down, and a valve disposed at a predetermined position below the plunger. A valve seat having a mouth, and a spring member that biases the plunger downward in order to press the seal member on the lower end surface of the plunger against the valve seat, and a current is applied to the coil to move the plunger against the spring member to move the fixed iron core. The valve opening can be opened by suction with Regarding solenoid valves.

この種の比例電磁弁は、プランジヤに備えられ
ているシール部材と弁座の弁口との間の間隙の幅
を、コイルに流れる電流に応じて微妙に調整しな
ければならないことから、プランジヤのストロー
ク長さを極く短くするとともに、プランジヤに作
用するばね部材のばね力の推移を、弁口閉塞点に
向つて直線状に減衰し、最終的には小さい一定の
ばね力で弁口を閉塞保持できるようにしておかな
ければならない。 In this type of proportional solenoid valve, the width of the gap between the sealing member provided on the plunger and the valve opening of the valve seat must be delicately adjusted according to the current flowing through the coil, so the plunger In addition to minimizing the stroke length, the transition of the spring force of the spring member acting on the plunger is linearly attenuated toward the valve port closing point, and the valve port is finally closed with a small constant spring force. It must be possible to hold it.

従来のこの種の比例電磁弁は、上記ばね部材が
１枚の板ばねで構成されているため、上記シール
部材が僅かでも摩滅すると、板ばねは、弁口を閉
塞保持するに充分なばね力を作用し得なくなつて
しまい、コイルに流れる電流を切つたあとも流体
が流れるとか僅かな衝撃で簡単に開弁するなどと
いう欠点がある。 In a conventional proportional solenoid valve of this type, the spring member is composed of a single leaf spring, so if the seal member wears out even slightly, the leaf spring exerts sufficient spring force to keep the valve port closed. There are drawbacks such as fluid flowing even after the current flowing through the coil is cut off, and the valve opening easily with the slightest shock.

本考案はこのような欠点を簡単に解消できるよ
うにしたもので、その特徴は、プランジヤに縦長
のばね受入凹部を設け、また固定鉄心にばね調整
ロツドを貫通装着してその下端鍔部を上記受入凹
部内に摺動可能に嵌合させ、この下端鍔部とばね
受入凹部の底面との間で該ばね受入凹部内に、ば
ね力の強いコイルばねと弱いコイルばねとを、そ
れらの間にばね受け体を介在させて上下に直列配
置したことにある。 The present invention is designed to easily overcome these drawbacks.The features of this invention are that the plunger is provided with a vertically elongated spring receiving recess, and a spring adjustment rod is inserted through the fixed core so that its lower end flange is A coil spring with a strong spring force and a coil spring with a weak spring force are slidably fitted into the receiving recess, and a coil spring with a strong spring force and a coil spring with a weak spring force are placed between the lower end flange and the bottom surface of the spring receiving recess. The reason is that they are arranged vertically in series with a spring receiver interposed between them.

このようにすると、強い方のコイルばねで主と
してプランジヤの復帰動作が行われ、弱い方のコ
イルばねで弁口の閉塞作用が行われる。 In this way, the stronger coil spring mainly performs the returning action of the plunger, and the weaker coil spring performs the valve opening closing action.

以下には本考案を図示の実施例について詳細に
説明する。 The present invention will now be described in detail with reference to the illustrated embodiments.

本比例電磁弁は、弁本体１上に電磁石アツセン
ブリ２を設置した単品構造になつている。 This proportional solenoid valve has a single-piece structure in which an electromagnet assembly 2 is installed on a valve body 1.

弁本体１は、その対向する両側面にそれぞれイ
ンポート３とアウトポート４とを設け、またこれ
ら両ポート３，４に連通する内側凹部５に弁座体
６を嵌着している。 The valve body 1 is provided with an inlet 3 and an outport 4 on opposite sides thereof, and a valve seat body 6 is fitted into an inner recess 5 communicating with both the ports 3 and 4.

弁座体６の上側部は、弁本体１の弁室である外
側凹部７内に臨んでいる。 The upper side of the valve seat body 6 faces into the outer recess 7 which is the valve chamber of the valve body 1.

弁座体６には縦孔８が穿設されている。この縦
孔８の上端開口は、弁座体６の上面中央の突部の
先端において開口して弁口９になつており、該突
部が弁座体６の実質的な弁座１０になつている。 A vertical hole 8 is bored in the valve seat body 6. The upper end opening of this vertical hole 8 opens at the tip of a protrusion at the center of the upper surface of the valve seat body 6 to become a valve port 9, and the protrusion serves as a substantial valve seat 10 of the valve seat body 6. ing.

他方、電磁石アツセンブリ２は、非磁性体製の
ガイドパイプ１１の上端部に固定鉄心１２を嵌着
するとともに、これらガイドパイプ１１及び固定
鉄心１２の外側にコイル１３を巻装し、かつプラ
ンジヤ１４を、固定鉄心１２の下側であつてガイ
ドパイプ１１内に摺動自在に嵌装したものであ
る。そして、この電磁石アツセンブリ２は、ガイ
ドパイプ１１の下端部を弁本体１に固着すること
により該弁本体１上に取り付けられ、そのガイド
パイプ１１内を弁本体１の外側凹部７と連通させ
ている。 On the other hand, the electromagnet assembly 2 has a fixed core 12 fitted to the upper end of a guide pipe 11 made of a non-magnetic material, a coil 13 wound around the guide pipe 11 and the fixed core 12, and a plunger 14. , which is located below the fixed iron core 12 and is slidably fitted into the guide pipe 11. The electromagnet assembly 2 is mounted on the valve body 1 by fixing the lower end of the guide pipe 11 to the valve body 1, and communicates the inside of the guide pipe 11 with the outer recess 7 of the valve body 1. .

プランジヤ１４は、その下面に設けたシール部
材嵌入凹部１５内に、ゴム等の弾性素材製のシー
ル部材１６を嵌着している。このシール部材１６
は、それに貫通させてプランジヤ１４に貫着した
ピン１７によつて凹部１５よりの抜脱を阻止され
ている。 The plunger 14 has a seal member 16 made of an elastic material such as rubber fitted into a seal member fitting recess 15 provided on the lower surface thereof. This seal member 16
is prevented from coming out of the recess 15 by a pin 17 that is inserted through the plunger 14 and is attached to the plunger 14.

また、プランジヤ１４は、その外周面に流体通
路となる縦長溝１８を形成するとともに、上面に
縦長のばね受入凹部１９を掘設している。 Further, the plunger 14 has a longitudinal groove 18 formed on its outer peripheral surface to serve as a fluid passage, and an elongated spring receiving recess 19 is formed on its upper surface.

このばね受入凹部１９内には、強弱２個のコイ
ルばね２０，２１が、それらの間にばね受体２２
を介在させて上下に直列に並べて配設されてい
る。 Inside this spring receiving recess 19, two strong and weak coil springs 20, 21 are placed between them with a spring receiver 22.
They are arranged vertically in series with

上側の強い方のコイルばね２０は、固定鉄心１
２に貫装したばね調整ロツド２３の下端鍔部２４
によつて上側から押さえられている。この下端鍔
部１４はばね受入凹部１９中に摺動可能に挿入し
ている。 The upper stronger coil spring 20 is connected to the fixed iron core 1
Lower end flange 24 of spring adjustment rod 23 inserted through 2
It is held down from above by The lower end flange 14 is slidably inserted into the spring receiving recess 19.

ばね調整ロツド２３は、その上端の雄ねじ部２
５を固定鉄心１２のねじ穴２６に螺合させてい
て、固定鉄心１２に対し上下に螺進させることが
できるようになつている。 The spring adjustment rod 23 has a male threaded portion 2 at its upper end.
5 is screwed into a screw hole 26 of the fixed iron core 12, so that it can be screwed up and down with respect to the fixed iron core 12.

固定鉄心１２の下面には、非磁性体製の環状薄
板２８が付設され、またばね調整ロツド２３の雄
ねじ部２５には、それをロツクするロツクナツト
２９が螺着され、さらに固定鉄心１２の上端の雄
ねじ部３０には、コイル１３をロツクするロツク
ナツト３１、及びねじ調整ロツド２３の雄ねじ部
２５の周囲をカバーするキヤツプ３２が嵌着され
ている。 A thin annular plate 28 made of a non-magnetic material is attached to the lower surface of the fixed core 12, and a lock nut 29 is screwed onto the male threaded portion 25 of the spring adjustment rod 23 to lock it. A lock nut 31 that locks the coil 13 and a cap 32 that covers the periphery of the male threaded portion 25 of the threaded adjustment rod 23 are fitted into the male threaded portion 30.

しかして、コイル１３が消勢されているときに
は、図示のように、強い方のコイルばね２０はほ
ぼ最大限まで伸長した状態で弱い方のばね２１を
圧縮させ、ばね受体２２の下端をばね受入凹部１
９の底面に圧接させるもので、これによりプラン
ジヤ１４は、主として弱い方のコイルばね２１の
作用により弁座１０側（下側）へ付勢され、シー
ル部材１６を弁座１０に圧接させて弁口９を閉塞
する。 When the coil 13 is deenergized, the stronger coil spring 20 is stretched to the maximum extent and compresses the weaker spring 21, causing the lower end of the spring receiver 22 to be compressed. Receiving recess 1
As a result, the plunger 14 is urged toward the valve seat 10 (lower side) mainly by the action of the weaker coil spring 21, and the sealing member 16 is pressed against the valve seat 10 to close the valve. Close the mouth 9.

従つて、コイル１３が消勢状態のときは、弁口
９は、主として弱い方のコイルばね２１のばね力
によつて閉塞保持されるもので、かかるとき該コ
イルばね２１は圧縮されているので、シール部材
１６が摩滅してもまた本比例電磁弁が衝撃を受け
ても弁口９を的確に閉塞保持できる。 Therefore, when the coil 13 is in the de-energized state, the valve port 9 is kept closed mainly by the spring force of the weaker coil spring 21, and at this time the coil spring 21 is compressed. Even if the sealing member 16 is worn out or the proportional solenoid valve receives an impact, the valve port 9 can be kept closed accurately.

コイル１３に電流を流すと、その電流に応じた
吸引力でプランジヤ１４が固定鉄心１２に吸引さ
れるもので、プランジヤ１４は、この吸引力が強
い方のばね２０のばね力と平衡する位置まで上側
へ変位せられる。 When a current is passed through the coil 13, the plunger 14 is attracted to the fixed iron core 12 by an attractive force corresponding to the current, and the plunger 14 is moved to a position where this attractive force is balanced with the spring force of the spring 20 with the stronger force. Displaced upward.

かくして、シール部材１６が弁座１０より離れ
て弁口９が開くとともにこれらシール部材１６と
弁口９との間に、コイル１３に流れる電流に応じ
た間隙が形成されるもので、アウトポート４側を
真空にしあるいはインポート３より流体（例えば
ガス）を送入すると、インポート３に入つたガス
は、上記間隙において絞られ、そこよりさらに弁
口９及び縦孔８を通つてアウトポート４より送出
されるもので、コイル１３に流れる電流を調整し
て上記間隙の幅を変えることによりガスの流量を
調整することができる。 In this way, the seal member 16 is separated from the valve seat 10 and the valve port 9 opens, and a gap corresponding to the current flowing through the coil 13 is formed between the seal member 16 and the valve port 9. When the side is evacuated or a fluid (for example, gas) is introduced from the import 3, the gas entering the import 3 is throttled in the gap, and from there it is further sent out from the out port 4 through the valve port 9 and the vertical hole 8. The gas flow rate can be adjusted by adjusting the current flowing through the coil 13 and changing the width of the gap.

コイルばね２０，２１のばね力は、ばね調整ロ
ツド２３を回すことにより調整できる。 The spring force of the coil springs 20, 21 can be adjusted by turning the spring adjustment rod 23.

以上詳述したように、本考案比例電磁弁は、プ
ランジヤを弁座側へ付勢するばね部材として強弱
２個のコイルばねを用い、これら両ばねをプラン
ジヤの軸線方向に直列配置して強い方のコイルば
ねで主としてプランジヤの復帰作用を行い、また
弱い方のコイルばねで弁口閉塞保持作用を行うよ
うにしたので、シール部材が摩滅してもまた本比
例電磁弁が衝撃を受けても弁口を的確に閉塞保持
できる。 As detailed above, the proportional solenoid valve of the present invention uses two strong and weak coil springs as spring members that urge the plunger toward the valve seat, and these springs are arranged in series in the axial direction of the plunger, so that the stronger one The coil spring mainly performs the return action of the plunger, and the weaker coil spring performs the action of keeping the valve port closed, so even if the sealing member wears out or the proportional solenoid valve receives an impact, the valve will remain intact. Can keep the mouth closed accurately.

また、強弱両コイルばねをプランジヤに設けら
れたばね受入凹部内に直列配置するとともに、ば
ね力を調整するばね調整ロツドを固定鉄心に貫通
装着したので、小型化を図れる。しかも、これら
両コイルばねの間にばね受け体を介在させ、また
ばね調整ロツドの下端鍔部を上記ばね受入凹部に
嵌合させ、この下端鍔部で強い方のコイルばねを
上側から押さえたので、ばね力調整を的確に行え
るとともに、弱い方のコイルばねによる弁口閉塞
作用を、強い方のコイルばねに干渉されることな
く的確に行える。 In addition, both the strong and weak coil springs are arranged in series in the spring receiving recess provided in the plunger, and the spring adjustment rod for adjusting the spring force is inserted through the fixed core, making it possible to reduce the size. Moreover, a spring receiver is interposed between these two coil springs, and the lower end flange of the spring adjustment rod is fitted into the spring receiving recess, and the stronger coil spring is held down from above by this lower end flange. , the spring force can be adjusted accurately, and the valve opening closing action by the weaker coil spring can be performed accurately without being interfered with by the stronger coil spring.

【図面の簡単な説明】[Brief explanation of the drawing]

図面は本考案の一実施例を示す断面図である。 ９……弁口、１０……弁座、１１……ガイドパ
イプ、１２……固定鉄心、１３……コイル、１４
……プランジヤ、１６……シール部材、１９……
ばね受け凹部、２０，２１……コイルばね、２２
……ばね受け体、２３……ばね調整ロツド、２４
……下端鍔部。 The drawing is a sectional view showing an embodiment of the present invention. 9... Valve port, 10... Valve seat, 11... Guide pipe, 12... Fixed core, 13... Coil, 14
... Plunger, 16 ... Seal member, 19 ...
Spring receiving recess, 20, 21...Coil spring, 22
... Spring receiver, 23 ... Spring adjustment rod, 24
...lower end flange.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 固定鉄心１２と、該固定鉄心１２を励磁するコ
イル１３と、固定鉄心１２の下方でガイドパイプ
１１に上下摺動自在に嵌装されたプランジヤ１４
と、該プランジヤ１４の下方の所定位置に配置さ
れた弁口９を有する弁座１０と、プランジヤ１４
の下端面のシール部材１６を弁座１０に圧接させ
るべく該プランジヤ１４を下方へ付勢するばね部
材とを備え、コイル１３に電流を流しプランジヤ
１４をばね部材に抗して固定鉄心１２で吸引する
ことにより弁口９を開くことができるとともに、
コイル１３に流れる電流を調整して固定鉄心１２
の吸引力を変えシール部材１６と弁口９の間の間
隙を調整することにより、絞り量を調整できる比
例電磁弁において、前記プランジヤ１４に縦長の
ばね受入凹部１９を設け、また前記固定鉄心１２
にばね調整ロツド２３を貫通装着してその下端鍔
部２４を上記受入凹部１９内に摺動可能に嵌合さ
せ、この下端鍔部２４とばね受入凹部１９の底面
との間で該ばね受入凹部１９内に、ばね力の強い
コイルばね２０と弱いコイルばね２１とを、それ
らの間にばね受け体２２を介在させて上下に直列
配置したことを特徴する比例電磁弁。 A fixed iron core 12, a coil 13 that excites the fixed iron core 12, and a plunger 14 fitted to the guide pipe 11 below the fixed iron core 12 so as to be slidable up and down.
, a valve seat 10 having a valve port 9 disposed at a predetermined position below the plunger 14;
and a spring member that urges the plunger 14 downward to bring the seal member 16 on the lower end surface into pressure contact with the valve seat 10, and a current is applied to the coil 13 to cause the plunger 14 to be attracted by the fixed iron core 12 against the spring member. By doing so, the valve port 9 can be opened, and
The fixed iron core 12 is adjusted by adjusting the current flowing through the coil 13.
In this proportional solenoid valve, the amount of throttling can be adjusted by changing the suction force and adjusting the gap between the sealing member 16 and the valve port 9, the plunger 14 is provided with a vertically long spring receiving recess 19, and the fixed iron core 12 is provided with a vertically long spring receiving recess 19.
The spring adjusting rod 23 is inserted through the spring, and its lower end flange 24 is slidably fitted into the receiving recess 19, and the spring adjusting rod 23 is inserted between the lower end flange 24 and the bottom surface of the spring receiving recess 19. 1. A proportional solenoid valve characterized in that a coil spring 20 with a strong spring force and a coil spring 21 with a weak spring force are arranged vertically in series with a spring receiver 22 interposed between them.