JPH049500Y2 - - Google Patents

Description

【考案の詳細な説明】 （産業上の利用分野） 本考案は定流量弁特に流量指示計をその内部に
組込まれている定流量弁に関する。[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a constant flow valve, particularly a constant flow valve having a flow indicator incorporated therein.

（従来の技術） 従来、弁体と縮流部との組み合わせによる定流
量弁にあつては、ばねに直接弁体が取り付けられ
ているので流れの変化により弁体の振動が激し
く、またばねが直接流体の流れの中に取り付けら
れているため、ごみ等が付着したり振動が生じた
りして精度上難点があつた。(Prior art) Conventionally, in a constant flow valve that combines a valve body and a flow contraction part, the valve body is attached directly to a spring, so changes in flow cause the valve body to vibrate violently, and the spring also Since it is installed directly in the flow of fluid, it has problems with accuracy due to the adhesion of dirt and vibrations.

そこで本出願人は第４図に示す通りの定流量弁
を実開昭59−116673号で提案した。 Therefore, the present applicant proposed a constant flow valve as shown in FIG. 4 in Japanese Utility Model Application No. 116673/1983.

即ち、内筒６内に弁軸５を貫通させ、内筒６内
に位置する弁軸５にスプリング７を挿通介在せし
め、又弁軸５の一端にダンパーの役目をするスプ
リング受８を固定し、内筒６外に位置する弁軸５
の他端に弁体４を取り付けた内筒６を筒管本体１
に装着し、弁体４の前後面に対する圧力P₁，P₂
が変化しても、予め定められた一定流量が流れる
ように設計された縮流部３を弁体４に対設して筒
管本体１の流体流出口部に設けた定流量弁であ
る。 That is, the valve shaft 5 is passed through the inner cylinder 6, the spring 7 is inserted through the valve shaft 5 located inside the inner cylinder 6, and a spring receiver 8 which functions as a damper is fixed to one end of the valve shaft 5. , the valve shaft 5 located outside the inner cylinder 6
The inner tube 6 with the valve body 4 attached to the other end is attached to the tube main body 1.
The pressure P ₁ , P ₂ on the front and rear surfaces of the valve body 4
This is a constant flow valve in which a flow contraction part 3 designed to allow a predetermined constant flow rate to flow even if the flow rate changes is provided at the fluid outlet part of the cylindrical pipe main body 1, with the flow contraction part 3 facing the valve body 4.

（考案が解決しようとする課題） しかし乍ら所定の一定流量を出口側に供給すべ
く設計製作された定流量弁でありながら供給側或
は排出側における流量の変化、即ち圧力の変動の
影響で充分定流量弁の働きをしなくなる場合があ
り、時として装置全体の事故につながるという事
態も生ずることがある。(Problem that the invention aims to solve) However, although it is a constant flow valve designed and manufactured to supply a predetermined constant flow rate to the outlet side, it is affected by changes in flow rate, that is, pressure fluctuations, on the supply side or discharge side. In some cases, the constant flow valve may no longer function properly, and this can sometimes lead to an accident of the entire device.

このため従来は別に流量計を用いて一次側の流
量の変化を測定してこれを予め把握してその防止
につとめていた。 For this reason, in the past, a separate flow meter was used to measure the change in the flow rate on the primary side to understand this in advance and to prevent it.

本考案はかゝる従来の欠点を解決すべく考案さ
れたものであつて定流量弁に流量の変化を直ちに
測定できる装置を一体として組み込んだところに
あり定流量弁の機能をさらに拡大したものであ
る。 The present invention was devised to solve these conventional drawbacks, and further expands the functions of a constant flow valve by incorporating a device that can immediately measure changes in flow rate into a constant flow valve. It is.

（課題を解決するための手段） 本考案は筒管本体１の縮流部３に臨ませた弁体
４の弁軸５を内筒６内に延長し、この弁軸５の内
筒６内の延長部にスプリング７を嵌挿すると共に
その端部にスプリング受８を設けた定流量弁にお
いて、内筒６の外径を下流側に縮小して筒管本体
１との間をテーパ管とし、このテーパ管内に受圧
板１０とスプリング１１を設け、かつ筒管本体１
の外部に目盛を付すか、又は筒管本体１と内筒６
の間にオリフイス１４を設けると共にオリフイス
１４前後の筒管本体１に開孔部を穿設してテーパ
管１５の入口１６、出口１７となし、一方テーパ
管１５内に受圧板１０、スプリング１１及びテー
パ管１５の出口側に制限***１８を設け、又テー
パ管１５の外部に目盛を付したことを特徴とする
定流量弁である。(Means for Solving the Problems) The present invention extends the valve stem 5 of the valve body 4 facing the flow contraction part 3 of the tube main body 1 into the inner cylinder 6, and extends the valve stem 5 into the inner cylinder 6. In a constant flow valve in which a spring 7 is inserted into an extension of the spring 7 and a spring receiver 8 is provided at the end thereof, the outer diameter of the inner cylinder 6 is reduced downstream to form a tapered pipe between the inner cylinder 6 and the cylinder main body 1. , a pressure receiving plate 10 and a spring 11 are provided in this tapered pipe, and a cylindrical pipe main body 1 is provided.
Either attach a scale to the outside of the tube body 1 and the inner tube 6.
An orifice 14 is provided in between, and openings are made in the cylindrical tube body 1 before and after the orifice 14 to serve as an inlet 16 and an outlet 17 of the tapered tube 15, while a pressure receiving plate 10, a spring 11, and a This constant flow valve is characterized in that a small restricting hole 18 is provided on the outlet side of the tapered pipe 15, and a scale is provided on the outside of the tapered pipe 15.

本考案において、内管６の外径を下流側に縮小
して筒管本体１との間をテーパ管とし、このテー
パ管を流れる流体によつて、受圧板１０がスプリ
ング１１に抗して移動するため、面積流量計の原
理により流量の変化を目盛により読みとることが
できる。 In the present invention, the outer diameter of the inner tube 6 is reduced downstream to form a tapered tube between it and the cylindrical tube body 1, and the pressure receiving plate 10 is moved against the spring 11 by the fluid flowing through the tapered tube. Therefore, changes in flow rate can be read on a scale based on the principle of an area flowmeter.

又筒管本体１と内筒６の間にオリフイス１４を
設け、その前後からテーパ管１５内に流体をバイ
パスさせテーパ管１５内の受圧板１０をスプリン
グ１１に抗して移動させるため、面積流量計の原
理により流量の変化を目盛により読みとることが
できる。 In addition, an orifice 14 is provided between the cylindrical tube body 1 and the inner tube 6, and in order to bypass the fluid into the tapered tube 15 from the front and back of the orifice and move the pressure receiving plate 10 in the tapered tube 15 against the spring 11, the areal flow rate is reduced. Based on the principle of the meter, changes in flow rate can be read on the scale.

なおテーパ管１５の出口側の制限***１８はオ
リフイス１４の按分比率としたのでバイパスを流
れる流量は筒管本体を流れる量の按分量となり受
圧板１０の指示は筒管本体１の流量と同一量とす
ることができる。 Note that the restriction small hole 18 on the outlet side of the tapered pipe 15 has a proportionate ratio of the orifice 14, so the flow rate flowing through the bypass is a proportionate amount of the amount flowing through the tube body, and the indication on the pressure receiving plate 10 is the same amount as the flow rate in the tube body 1. It can be done.

又ニードルバルブ１９をバイパス流路に設け
て、流量の調節を可能にしたので按分比率をより
細分化することができる。 Further, since the needle valve 19 is provided in the bypass flow path to enable adjustment of the flow rate, the proportioning ratio can be further divided.

（実施例） 実施例 １ 第１図において１は筒管本体で入口２から流体
が流入する。３は筒管本体１の下流側に設けた縮
流部３でその曲面は弁体４と協働して一定流量が
流れるように設計してある。６は内筒で外壁は下
流側に縮小して筒管本体１との間にテーパ管を形
成し、筒管本体１の内部に装着される内筒６の内
部には弁軸５に嵌挿したスプリング７、及び弁軸
５の一端に固定したスプリング受８があり、又内
筒外部には弁軸５の他端に弁体４が固定されてい
る。流体が筒管本体１の縮流部３を経て排出され
るとき弁体４はスプリング受８のダンパー作用に
よりハンチングが防止される。９はストレーナ、
１３は目盛板である。(Embodiments) Embodiment 1 In FIG. 1, numeral 1 denotes a cylindrical tube main body, into which fluid flows in from an inlet 2. Reference numeral 3 denotes a flow contraction section 3 provided on the downstream side of the tube main body 1, and its curved surface is designed to cooperate with the valve body 4 to allow a constant flow rate to flow. Reference numeral 6 denotes an inner cylinder whose outer wall is reduced toward the downstream side to form a tapered pipe between it and the cylinder main body 1.The inner cylinder 6 is installed inside the cylinder main body 1, and the valve shaft 5 is inserted into the inner cylinder 6. There are a spring 7 and a spring receiver 8 fixed to one end of the valve shaft 5, and a valve body 4 is fixed to the other end of the valve shaft 5 outside the inner cylinder. When the fluid is discharged through the contraction section 3 of the tube main body 1, hunting of the valve body 4 is prevented by the damper action of the spring receiver 8. 9 is a strainer,
13 is a scale plate.

ここで、筒管本体１の両端に流入管及び流出管
を連結し、圧力のある流体を流入すると流体は流
入管から内筒６と筒管本体１との間の通路を流
れ、さらに縮流部３を通過して流出管から排出さ
れる。 Here, an inflow pipe and an outflow pipe are connected to both ends of the cylindrical pipe body 1, and when a pressurized fluid flows in, the fluid flows from the inflow pipe through the passage between the inner cylinder 6 and the cylindrical pipe main body 1, and further condenses. It passes through section 3 and is discharged from the outflow pipe.

このとき圧力流体は弁体４と縮流部３との間で
縮流され、弁体４の前後部に圧力差を生ずる。従
つて弁体４は差圧によつて生ずる力を受け、スプ
リング７を圧縮して下流側へ進み縮流部３との間
に所要のオリフイス穴面積を形成して平衡する。 At this time, the pressure fluid is contracted between the valve body 4 and the flow contraction section 3, creating a pressure difference between the front and rear portions of the valve body 4. Therefore, the valve body 4 receives the force generated by the differential pressure, compresses the spring 7, moves downstream, forms a required orifice hole area between it and the contracting portion 3, and is balanced.

いまより高い圧力流体が流入するか、或は流出
側の流体の圧力が低下すると弁体４前後の差圧が
増大するため、弁体４は弁軸５、スプリング受８
と共に内筒６に内蔵されたスプリング７を圧縮し
乍ら下流側に移動し縮流部３との間のオリフイス
穴面積を縮小して平衡する。逆に流入する流体の
圧力が低下するか、流出側の流体の圧力が上昇し
た場合弁体４の前後の差圧が減少するためスプリ
ング７は伸張し、弁体４は弁軸５、スプリング受
８と共に上流側に移動しオリフイス穴面積を拡大
して平衡する。 When a higher pressure fluid flows in or the pressure of the fluid on the outflow side decreases, the differential pressure across the valve body 4 increases, so the valve body 4 is forced to move between the valve shaft 5 and the spring bearing 8.
At the same time, the spring 7 built in the inner cylinder 6 is compressed and moved downstream to reduce the area of the orifice hole between it and the contracted flow section 3 to achieve equilibrium. Conversely, when the pressure of the inflowing fluid decreases or the pressure of the fluid on the outflow side increases, the differential pressure across the valve body 4 decreases, causing the spring 7 to expand, causing the valve body 4 to move between the valve shaft 5 and the spring bearing. 8 and moves upstream to expand the orifice hole area and achieve equilibrium.

このように流体の圧力の変化に応じて弁体４、
弁軸５並びにスプリング受８も移動し、この時ス
プリング７は内筒６の内壁並びに閉そく端とスプ
リング受８との間に拘束されながら伸縮する。縮
流部３は、弁体４との組合わせで流体が一定流量
となるような曲面によつて形成されているため流
入側や流出側の圧力変化に対応して常に一定の流
量を排出管から得ることができる。 In this way, the valve body 4,
The valve stem 5 and the spring receiver 8 also move, and at this time the spring 7 expands and contracts while being restrained between the inner wall and the closed end of the inner cylinder 6 and the spring receiver 8. The flow contraction part 3 is formed by a curved surface that maintains a constant flow rate of fluid in combination with the valve body 4, so that the flow rate always remains constant in response to pressure changes on the inflow and outflow sides of the discharge pipe. can be obtained from.

ところで斯る定流量弁において今流れている流
量を知りたい場合、従来は別に流量計などを用い
て測定していた。 By the way, if you want to know the current flow rate in such a constant flow valve, conventionally you have measured it separately using a flow meter or the like.

本案は第１図に示す如く、筒管本体１と内筒６
との間の〓間にスプリング１１と受圧板１０を介
在させ、筒管本体１と内筒６の〓間を流れる流体
が所定以上流れた場合スプリング１１の作用によ
り受圧板１０がこの〓間を移動させるようにし
た。 As shown in FIG.
A spring 11 and a pressure receiving plate 10 are interposed between the cylindrical pipe body 1 and the inner cylinder 6, and when the fluid flowing between the cylindrical pipe body 1 and the inner cylinder 6 exceeds a predetermined value, the pressure receiving plate 10 moves between the cylindrical tube body 1 and the inner cylinder 6 by the action of the spring 11. I tried to move it.

しかし筒管本体１と内筒６の間の〓間はテーパ
流路となつているため面積流量計の原理により受
圧板１０は流量計の指針となりスプリング１１の
強さにより適宜移動し移動量を把握することによ
り流量が読み取れる。又筒管本体１の外部に目盛
板１３をつけておけば流量計として使用すること
ができ、さらに受圧板１０を磁性材料製としてお
けば、筒管本体が不透明材料製でも移動量が把握
できる。 However, since the space between the tube main body 1 and the inner tube 6 is a tapered flow path, the pressure receiving plate 10 acts as a guide for the flowmeter according to the principle of an area flowmeter, and is moved appropriately by the strength of the spring 11 to control the amount of movement. By understanding this, you can read the flow rate. Furthermore, if a scale plate 13 is attached to the outside of the tube body 1, it can be used as a flowmeter, and if the pressure receiving plate 10 is made of a magnetic material, the amount of movement can be grasped even if the tube body is made of an opaque material. .

実施例 ２ 第２図において筒管本体１と内筒６との間の〓
間にオリフイス１４を設け、かつオリフイス１４
の前後に開孔部を穿設してテーパ管１５の入口１
６、出口１７となし、テーパ管１５の中にスプリ
ング１１と受圧板１０を収納し、テーパ管１５の
外部に目盛板１３を、又テーパ管１５の出口側に
制限小孔１８を設けたものである。オリフイス１
４と制限***１８との大きさを流量の按分比率で
定めればテーパ管１５内の受圧板１０の移動量が
流量計として機能する。その他は第１図と同様で
ある。Embodiment 2 In FIG.
An orifice 14 is provided in between, and the orifice 14
The entrance 1 of the tapered pipe 15 is
6. With an outlet 17, a spring 11 and a pressure receiving plate 10 are housed in a tapered tube 15, a scale plate 13 is provided on the outside of the tapered tube 15, and a small restriction hole 18 is provided on the outlet side of the tapered tube 15. It is. Orifice 1
If the sizes of the pressure receiving plate 10 and the restricting hole 18 are determined by the proportion of the flow rate, the amount of movement of the pressure receiving plate 10 within the tapered pipe 15 functions as a flow meter. Other details are the same as in FIG.

実施例 ３ 第３図に示す如く、第２図の制限***１８にニー
ドルバルブ１９を設置することにより流量の制御
範囲をより拡大可能である。Embodiment 3 As shown in FIG. 3, by installing a needle valve 19 in the restriction small hole 18 in FIG. 2, the control range of the flow rate can be further expanded.

なおニードルバルブ１９を第３図では制限***
１８に設けたがバイパス流路のテーパ管部分以外
であれば何処に設けてもその機能は同一である。 Although the needle valve 19 is provided in the restriction hole 18 in FIG. 3, its function is the same even if it is provided anywhere other than the tapered pipe portion of the bypass flow path.

（考案の効果） 本考案によれば流量計が定流量弁内に組込まれ
ているため、定流量が流れていることを確認する
ためいちいち別に流量計で測定する繋雑さをさけ
ることができる。また自由な方向に取り付けられ
るので配管が容易になり、コストの低減にも大い
に貢献するところ大である。(Effects of the invention) According to the invention, since the flow meter is built into the constant flow valve, it is possible to avoid the trouble of having to measure each time with a flow meter to confirm that a constant flow is flowing. . Furthermore, since it can be installed in any direction, piping is easy, which greatly contributes to cost reduction.

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

第１図、第２図、第３図は本考案の一実施例の
説明図、第４図は従来の定流量弁の説明図であ
る。 １……筒管本体、２……入口、３……縮流部、
４……弁体、５……弁軸、６……内筒、７……ス
プリング、８……スプリング受、９……ストレー
ナー、１０……受圧板、１１……スプリング、１
３……目盛板、１４……オリフイス、１５……テ
ーパ管、１６……流体入口、１７……流体出口、
１８……制限***、１９……ニードルバルブ。 FIGS. 1, 2, and 3 are explanatory diagrams of an embodiment of the present invention, and FIG. 4 is an explanatory diagram of a conventional constant flow valve. 1...tube main body, 2...inlet, 3...contractor section,
4... Valve body, 5... Valve stem, 6... Inner cylinder, 7... Spring, 8... Spring receiver, 9... Strainer, 10... Pressure receiving plate, 11... Spring, 1
3... Scale plate, 14... Orifice, 15... Tapered pipe, 16... Fluid inlet, 17... Fluid outlet,
18...Restriction small hole, 19...Needle valve.

Claims (1)

【実用新案登録請求の範囲】 １ 筒管本体１の縮流部３に臨ませた弁体４の弁
軸５を内筒６内に延長し、この弁軸５の内筒６
内の延長部にスプリング７を嵌挿すると共にそ
の端部にスプリング受８を設けた定流量弁にお
いて、内筒６の外径を下流側に縮小して筒管本
体１との間をテーパ管とし、このテーパ管内に
受圧板１０とスプリング１１を設け、かつ筒管
本体１の外部に目盛を付したことを特徴とする
定流量弁。 ２ 筒管本体１の縮流部３に臨ませた弁体４の弁
軸５を内筒６内に延長し、この弁軸５の内筒６
内の延長部にスプリング７を嵌挿すると共にそ
の端部にスプリング受８を設けた定流量弁にお
いて、筒管本体１と内管６の間にオリフイス１
４をもうけると共にオリフイス１４前後の筒管
本体１に開孔部を穿設して、テーパ管１５の入
口１６、出口１７となし、一方テーパ管１５内
に受圧板１０、スプリング１１、及びテーパ管
１５の出口側に制限***１８を設け、又テーパ
管１５外部に目盛を付したことを特徴とする定
流量弁 ３ バイパス流路内にニードルバルブ１９を設け
た請求項２記載の定流量弁 ４ 筒管本体１を透視材料製にした請求項１記載
の定流量弁 ５ テーパ管１５を透視材料製にした請求項２記
載の定流量弁 ６ 受圧板１０を磁性材料製にした請求項１又は
２記載の定流量弁。[Claims for Utility Model Registration] 1. The valve stem 5 of the valve body 4 facing the flow contraction part 3 of the cylinder pipe body 1 is extended into the inner cylinder 6, and the inner cylinder 6 of the valve stem 5 is extended into the inner cylinder 6.
In a constant flow valve in which a spring 7 is inserted into the inner extension part and a spring receiver 8 is provided at the end thereof, the outer diameter of the inner cylinder 6 is reduced downstream and a tapered pipe is formed between the inner cylinder 6 and the cylinder main body 1. A constant flow valve characterized in that a pressure receiving plate 10 and a spring 11 are provided inside the tapered pipe, and a scale is provided on the outside of the cylindrical pipe body 1. 2. Extend the valve stem 5 of the valve body 4 facing the contraction part 3 of the cylindrical pipe body 1 into the inner cylinder 6, and
In a constant flow valve in which a spring 7 is inserted into the inner extension part and a spring receiver 8 is provided at the end thereof, an orifice 1 is provided between the cylindrical pipe body 1 and the inner pipe 6.
4, and openings are made in the cylindrical tube body 1 before and after the orifice 14 to serve as an inlet 16 and an outlet 17 of the tapered tube 15, while a pressure receiving plate 10, a spring 11, and a tapered tube are installed inside the tapered tube 15. Constant flow valve 3 characterized in that a restriction small hole 18 is provided on the outlet side of the tapered pipe 15 and a scale is provided on the outside of the tapered pipe 15.The constant flow valve 4 according to claim 2, further comprising a needle valve 19 provided in the bypass flow path. The constant flow valve 5 according to claim 1, wherein the cylindrical pipe body 1 is made of a transparent material. The constant flow valve 6 according to claim 2, wherein the tapered pipe 15 is made from a transparent material. The pressure receiving plate 10 is made from a magnetic material. Constant flow valve according to 2.