JP2000161512A - Constant flow rate valve - Google Patents
Constant flow rate valveInfo
- Publication number
- JP2000161512A JP2000161512A JP10333654A JP33365498A JP2000161512A JP 2000161512 A JP2000161512 A JP 2000161512A JP 10333654 A JP10333654 A JP 10333654A JP 33365498 A JP33365498 A JP 33365498A JP 2000161512 A JP2000161512 A JP 2000161512A
- Authority
- JP
- Japan
- Prior art keywords
- valve
- valve seat
- constant flow
- spring
- fluid
- 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.)
- Pending
Links
Landscapes
- Safety Valves (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、例えば、水洗トイ
レの排水タンクへの給水、あるいは排水用の装置等用い
られ、管路を流れる流体の圧力の変化に関わらず流量を
常に一定に保つように調節するための定流量弁に関し、
特に、このような弁を通る流体の騒音を低減するように
した定流量弁に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used, for example, for supplying water to a drainage tank of a flush toilet or for draining the water, so that the flow rate is always kept constant irrespective of a change in pressure of a fluid flowing through a pipeline. For a constant flow valve to adjust to
In particular, it relates to a constant flow valve adapted to reduce noise of a fluid passing through such a valve.
【０００２】[0002]
【従来の技術】例えば、水洗トイレの排水タンクにおい
ては、タンク内に水が充分に入っているとき、その水の
表面に浮いているフロートは、水位が上昇していること
によりその位置が上昇し、フロートに連結した開閉弁を
閉じている。この水洗トイレの使用時には、使用者がレ
バー等を操作することにより、開閉弁を強制的に開放す
ると共にその状態を維持させ、貯溜していた水を開閉弁
から流下させる。その際、この給水系統に定流量弁を設
けないときには、最初は水位の高い状態から水が流れる
ため、開閉弁を流下する水の圧力は高く、大量の水が流
れ、また、タンク内の水が減少するにつれてその水位が
低下し、開閉弁を流下する水の圧力は低くなり、流量は
減少する。そのため、一時的に大量の水が流れて便器か
らの排水とのバランスが崩れて便器内の水位が一時的に
上昇し溢れる事態ともなり、一方では、水洗の機能は最
初の短時間は強いものの、その後タンク内の水位の低下
につれて流量が減少すると水洗機能がほとんどなくな
り、全体としての水洗機能が悪くなる。また、開閉弁か
ら流下する水は、最初その流量が大きいため、騒音が大
きくなってしまい、特にマンション等の共同住宅や、ホ
テル等においては好ましくない。2. Description of the Related Art For example, in a drain tank of a flush toilet, when water is sufficiently contained in the tank, a float floating on the surface of the water rises due to a rise in water level. Then, the on-off valve connected to the float is closed. When using the flush toilet, the user operates the lever or the like to forcibly open the on-off valve and maintain the state, thereby causing the stored water to flow down from the on-off valve. At this time, when a constant flow valve is not provided in this water supply system, water flows from the high water level at first, so the pressure of the water flowing down the on-off valve is high, a large amount of water flows, and the water in the tank As the pressure decreases, the water level decreases, the pressure of the water flowing down the on-off valve decreases, and the flow rate decreases. As a result, a large amount of water temporarily flows and the balance with the drainage from the toilet bowl is lost, and the water level in the toilet bowl temporarily rises and overflows.On the other hand, although the flushing function is strong for the first short time, Then, when the flow rate decreases as the water level in the tank decreases, the flushing function is almost eliminated, and the flushing function as a whole deteriorates. Further, the water flowing down from the on-off valve has a large flow rate at first, so that the noise is increased, which is not preferable especially in a condominium such as an apartment or a hotel.
【０００３】その対策として、タンク内の水位の変化に
関わらず常に一定の流量を流すように、流れる水の圧力
が高いときは弁を絞り、その圧力が低くなったときには
弁を開放することにより常に流量が一定になるようにす
るため、上記給水系統や排水系統に定流量弁を設けてい
る。このような定流量弁としては、従来、図１０に示す
ようなものが用いられている。すなわち、流入口５０と
流出口５１との間に流路５２を形成した弁本体５３の内
壁面の一部をテーパ状に形成して弁部５４とし、この弁
部５４の大径部５５側に固定した止め輪５６で移動が止
められているスリーブ５７の外周に弁座体５８を固定
し、この弁座体５８の端面５９と弁本体５３に形成した
段部６０との間にスプリング６１を縮設している。スリ
ーブ５７は円筒状をなし、中心に小孔６７を形成してお
り、円筒状の外周面６４が弁座体５８の基部６５におけ
る円筒状内面と嵌合し固定している。弁座体５８は、こ
の基部６５の端面５９にガイド部６６を備えており、端
面５９と弁本体５３に形成した段部６０との間に縮設し
たスプリング６１の一端部を案内している。また、ガイ
ド部６６の先端周囲は図中４カ所のリブ４８で支持され
ており、各リブの間には側部流通孔６８が形成され、端
面には端面流通孔６９が形成されている。As a countermeasure, the valve is throttled when the pressure of flowing water is high, and is opened when the pressure of the flowing water is low so that a constant flow rate is always supplied regardless of a change in the water level in the tank. In order to maintain a constant flow rate, a constant flow valve is provided in the water supply system and the drainage system. Conventionally, such a constant flow valve as shown in FIG. 10 is used. That is, a part of the inner wall surface of the valve body 53 in which the flow path 52 is formed between the inflow port 50 and the outflow port 51 is formed into a tapered shape to form a valve portion 54, and the large diameter portion 55 side of the valve portion 54 A valve seat body 58 is fixed to the outer periphery of a sleeve 57 which is stopped by a retaining ring 56 fixed to the valve body. A spring 61 is provided between an end face 59 of the valve seat body 58 and a stepped portion 60 formed on the valve body 53. Has been curtailed. The sleeve 57 has a cylindrical shape, and has a small hole 67 formed at the center. The cylindrical outer peripheral surface 64 is fitted and fixed to the cylindrical inner surface of the base 65 of the valve seat body 58. The valve seat body 58 has a guide portion 66 on an end surface 59 of the base portion 65, and guides one end of a spring 61 contracted between the end surface 59 and a step portion 60 formed on the valve body 53. . The periphery of the distal end of the guide portion 66 is supported by four ribs 48 in the figure. Side flow holes 68 are formed between the ribs, and end surface flow holes 69 are formed at the end surfaces.
【０００４】上記のような構造の従来の定流量弁におい
ては、弁本体５３の流入口５０側から弁本体５３内に入
る流体は、スリーブ５７の中心孔６７からガイド部６６
のリブ４８間の側部流通孔６８、及び端面流通孔６９を
通って一部流れ、また、弁座体５８の基部６５の外周と
弁部５４の内周面との間隙を通り、流出口５１から流出
する。この時、流入口５０からの流体の圧力が高いと、
その圧力は弁座体５８の受圧面としての弁座体裏面全体
に作用し、弁座体５８をスプリング６１に抗して流出口
５１側に移動させる。それにより弁座体５８は弁部５４
のテーパ面の小径側に移動するので、弁座体の基部６５
の外周と弁部５４の内周面との間隙は狭くなり、流量が
絞られるため流体の圧力が上昇しても全体としての流量
は一定となる。また、逆に、流入口５０からの流体の圧
力が低いときには、スプリング６１が弁座体５８を流入
口５０側に押し戻し、弁座体５８は弁部５４のテーパ面
の大径側に移動するので、弁座体５８の基部６５の外周
と弁部５４の内周面との間隙は増大し、多くの流体が流
通可能となり、流体の圧力が低下しても全体としての流
量は一定となる。このようにして、流入する流体の圧力
に応じて流路の開口面積を調節し、それによって一定流
量を維持するようにしている。In the conventional constant flow valve having the above-described structure, the fluid entering the valve body 53 from the inlet 50 side of the valve body 53 flows from the center hole 67 of the sleeve 57 to the guide portion 66.
Flows partly through the side flow holes 68 between the ribs 48 and the end surface flow holes 69, passes through the gap between the outer circumference of the base 65 of the valve seat body 58 and the inner circumference of the valve portion 54, and flows out. Outflow from 51. At this time, if the pressure of the fluid from the inlet 50 is high,
The pressure acts on the entire back surface of the valve seat body as a pressure receiving surface of the valve seat body 58, and moves the valve seat body 58 toward the outlet 51 against the spring 61. As a result, the valve seat body 58 is
Move to the smaller diameter side of the tapered surface of
The gap between the outer periphery of the valve member and the inner peripheral surface of the valve portion 54 becomes narrower, and the flow rate is reduced, so that the flow rate as a whole becomes constant even if the pressure of the fluid increases. Conversely, when the pressure of the fluid from the inflow port 50 is low, the spring 61 pushes the valve seat body 58 back to the inflow port 50 side, and the valve seat body 58 moves to the large diameter side of the tapered surface of the valve portion 54. Therefore, the gap between the outer periphery of the base portion 65 of the valve seat body 58 and the inner peripheral surface of the valve portion 54 increases, so that a large amount of fluid can flow, and the overall flow rate is constant even if the pressure of the fluid decreases. . In this way, the opening area of the flow path is adjusted according to the pressure of the flowing fluid, thereby maintaining a constant flow rate.
【０００５】[0005]
【発明が解決しようとする課題】このような従来の定流
量弁においては、図１１に示すように、流入口５０から
入った流体は、弁座体５８により流路５２の内周壁面側
に案内され、弁座体５８の基部６５の外周と弁部５４の
内周面との間隙部分、すなわち流路５２の最も外側を通
り、その後、流路の中央側に戻る流れを生じる。そのた
め弁座体５８を通った後の流体相互に激しい衝突を生
じ、ここで大きな騒音を発生していた。In such a conventional constant flow valve, as shown in FIG. 11, a fluid entering through an inlet 50 is applied to the inner peripheral wall surface of a flow passage 52 by a valve seat 58. As shown in FIG. The flow is guided, and flows through the gap between the outer periphery of the base 65 of the valve seat body 58 and the inner periphery of the valve portion 54, that is, the outermost part of the flow path 52, and then returns to the center of the flow path. As a result, the fluids after passing through the valve seat body 58 violently collide with each other, generating loud noise.
【０００６】また、弁座体５８はその背面全体で流入す
る流体の圧力を受けるため、受圧面積が大きく、わずか
な圧力変動で弁座体５８が移動するため、弁座体５８の
先端部における上記流体の衝突による圧力変動や、配水
系統のわずかな流れの変動時にも弁座体５８が移動し、
ハンチングを生じる等により流体の圧力変動を増長させ
ることがあり、これも騒音発生の原因となる。更に、上
記従来の定流量弁においては、弁座体５８と弁部５４と
の間で絞られた流体は、その後スプリング６１の外周か
ら内周に入る流路をとるため、スプリングの通過時に大
きな乱流を生じ、騒音を発生する原因となる。また、流
量を調節するための最も精度を要する部分である弁部５
４のテーパ面を、弁本体の内周面に形成しているため、
このテーパ面製造後の精度検査、目視等が困難であり、
製造時に手数を要する等の欠点があった。Further, since the valve seat 58 receives the pressure of the fluid flowing in the entire back surface thereof, the pressure receiving area is large, and the valve seat 58 moves with a slight pressure fluctuation. The valve seat body 58 moves even when the pressure fluctuates due to the collision of the fluid or when the flow slightly fluctuates in the water distribution system,
Fluctuations in the pressure of the fluid may increase due to hunting or the like, which also causes noise. Furthermore, in the above-mentioned conventional constant flow valve, the fluid restricted between the valve seat body 58 and the valve portion 54 takes a flow path from the outer periphery of the spring 61 to the inner periphery thereof, so that a large amount of fluid flows when the spring passes. This causes turbulence and noise. Further, the valve unit 5 which is the most necessary part for adjusting the flow rate is used.
Since the tapered surface of No. 4 is formed on the inner peripheral surface of the valve body,
It is difficult to perform precision inspection, visual inspection, etc. after manufacturing this tapered surface,
There are drawbacks such as the need for troublesome manufacturing.
【０００７】したがって、本発明は、弁を流通する流体
により騒音を発生することがなく、また、流体の圧力を
受けて移動する弁座体に対して過度の圧力を与えること
がないようにし、かつ製作の容易な定流量弁を提供する
ことを目的とする。[0007] Therefore, the present invention prevents the fluid flowing through the valve from generating noise, and prevents the valve seat moving under the pressure of the fluid from exerting excessive pressure. Another object of the present invention is to provide a constant flow valve which is easy to manufacture.
【０００８】[0008]
【課題を解決するための手段】本発明は、上記課題を解
決するため、請求項１に係る発明においては、上流側か
ら下流側に向けて径が拡大するテーパ面を外周に有する
ニードル弁部を備え、弁本体内の流路の中心に固定した
ニードル弁体と、内部に流路が形成され、該ニードル弁
部の外周と間隙を有する弁座部を備え、流路の軸線に沿
って摺動自在に設けた弁座体と、弁座体とニードル弁体
間に縮設したスプリングとからなることを特徴とする定
流量弁としたものであり、また、請求項２に係る発明に
おいては、弁本体内にスリーブを固定し、スリーブ内壁
に弁座体を摺動自在に設けたものであり、また、請求項
３に係る発明においては、ニードル弁体の中心部にばね
受け凹部を設け、スプリングを該ばね受け凹部の底面と
弁座体間に縮設したものであり、また、請求項４に係る
発明においては、ニードル弁体に設けたフランジ部の一
方の面を弁本体内の支持突起に当接させ、他方の面にス
リーブの先端部を当接し、該支持突起とスリーブにより
フランジを挟持してニードル弁体を固定したものであ
り、また、請求項５に係る発明においては、弁座体の中
心部にスプリングが嵌合するばねガイド筒を設けたもの
である。According to the present invention, in order to solve the above-mentioned problems, according to the first aspect of the present invention, there is provided a needle valve portion having a tapered surface on its outer periphery whose diameter increases from an upstream side to a downstream side. A needle valve body fixed to the center of the flow path in the valve body, a flow path is formed inside, a valve seat portion having a gap with the outer periphery of the needle valve portion, along the axis of the flow path A constant flow valve characterized by comprising a valve seat body slidably provided and a spring contracted between the valve seat body and the needle valve body. In the invention according to the third aspect, a sleeve is fixed in a valve body, and a valve seat body is slidably provided on the inner wall of the sleeve. And a spring is contracted between the bottom surface of the spring receiving recess and the valve seat body. In the invention according to claim 4, one surface of the flange portion provided on the needle valve body is brought into contact with the support projection in the valve body, and the tip of the sleeve is brought into contact with the other surface. The needle valve body is fixed by sandwiching a flange between the support projection and the sleeve. In the invention according to claim 5, a spring guide cylinder in which a spring is fitted is provided at the center of the valve seat body. It is a thing.
【０００９】[0009]
【発明の実施の形態】本発明の実施例を図面に沿って説
明する。図１は本発明の定流量弁の組立後の断面図を示
し、流体の流入口１及び流出口２を備えた筒状の弁本体
３内には、流入口１側に止輪係止溝４が形成され、流出
口２側には支持突起５が形成されている。ニードル弁体
６のフランジ部７の一方の面に形成したリング状の切欠
部８が前記支持突起５に嵌合し、フランジ部７の他方の
面側には円筒状のスリーブ１０の先端部９が当接してい
る。スリーブ１０の他端側には内方に突出する段部１１
が形成され、この段部１１には弁座体１２の外周端部に
設けたリング状の切欠部１３が嵌合している。弁座体１
２の中心部に設けたばねガイド筒１４はスプリング１５
の第１端部１６が嵌入し、この第１端部１６は、図２
（ｂ）に示すような弁座体１２に形成した十字形のリブ
１７に支持されている。また、スプリング１５の第２端
部１８は、ニードル弁体６の内部に形成したバネ受け凹
部２０内に挿入され、その底面２１で支持されている。
また、弁本体３の止輪係止溝４には、止輪２２が嵌合し
ている。Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view of a constant flow valve according to the present invention after assembling. In a cylindrical valve body 3 provided with a fluid inlet 1 and a fluid outlet 2, a retaining ring locking groove is provided on the inlet 1 side. 4 are formed, and a support protrusion 5 is formed on the outlet 2 side. A ring-shaped notch 8 formed on one surface of the flange portion 7 of the needle valve element 6 is fitted into the support projection 5, and a tip portion 9 of a cylindrical sleeve 10 is provided on the other surface side of the flange portion 7. Is in contact. An inwardly protruding step 11 is provided at the other end of the sleeve 10.
A ring-shaped notch 13 provided at the outer peripheral end of the valve seat body 12 is fitted into the step portion 11. Valve seat 1
The spring guide tube 14 provided at the center of the
The first end 16 of FIG.
It is supported by a cross-shaped rib 17 formed on the valve seat body 12 as shown in FIG. The second end 18 of the spring 15 is inserted into a spring receiving recess 20 formed inside the needle valve body 6 and is supported on a bottom surface 21 thereof.
A retaining ring 22 is fitted in the retaining ring locking groove 4 of the valve body 3.
【００１０】上記のような全体構成からなる定量弁１の
組立に際しては、図２（ａ）に示すようなスリーブ１０
の図中右側の開口から、弁座体１２を図２（ｃ）に示す
ように挿入する。スリーブ１０には弁座体１２の外周２
５が摺動するガイド筒部２６が形成され、このガイド筒
部２６より先端部９側は大径の円筒状をなしているの
で、弁座体１２は先端部９側からガイド筒部２６に挿入
することができ、弁座体１２の切欠部１３がスリーブ１
０の段部１１に嵌合した位置で停止する。When assembling the metering valve 1 having the above-described overall structure, a sleeve 10 as shown in FIG.
The valve seat body 12 is inserted from the opening on the right side of the drawing as shown in FIG. The outer periphery 2 of the valve seat body 12 is
5 is formed, and the distal end 9 side of the guide cylindrical portion 26 has a large-diameter cylindrical shape, so that the valve seat body 12 is moved from the distal end 9 side to the guide cylindrical portion 26. The notch 13 of the valve seat 12 can be inserted into the sleeve 1
It stops at the position where it is fitted to the step portion 11 of 0.
【００１１】一方、弁本体３には図３に示すように、流
入口１側からニードル弁体６のフランジ部７側を挿入し
ていく。前記のように、ニードル弁体６のフランジ部７
の外周裏面に形成した切欠部８が、弁本体３の支持突起
５に嵌合した位置で停止し、その後ニードル弁体６のバ
ネ受け凹部２０にスプリング１５を挿入する。ニードル
弁体６の外周面は、図４（ａ）に示すように、フランジ
部７に近付くほど大径となるテーパ状をなすニードル弁
部３２を備え、ニードル弁部３２の先端部３３は、流体
を案内するためニードル弁部３２より急なテーパ面とな
っている。また、ニードル弁部３２とフランジ部７との
連結部２８では、フランジ部７に近付くほど径が小さく
なる円錐面をなし、ニードル弁部３２で絞られた流体の
流路面積を円滑に拡大している。フランジ部７は図４
（ｂ）に示すように、中心の支持部３０から放射状に４
本のリブ３１が延びており、その外周にリング状の固定
部１９を備え、固定部１９の裏面側には切欠部８が形成
されている。On the other hand, as shown in FIG. 3, the flange 7 of the needle valve 6 is inserted into the valve body 3 from the inlet 1 side. As described above, the flange portion 7 of the needle valve body 6
The notch 8 formed on the outer peripheral back surface of the valve body 3 stops at a position where it is fitted to the support projection 5 of the valve body 3, and then the spring 15 is inserted into the spring receiving recess 20 of the needle valve body 6. As shown in FIG. 4A, the outer peripheral surface of the needle valve element 6 includes a tapered needle valve element 32 having a larger diameter as approaching the flange section 7. It has a taper surface that is steeper than the needle valve portion 32 for guiding the fluid. In addition, the connecting portion 28 between the needle valve portion 32 and the flange portion 7 forms a conical surface whose diameter decreases as approaching the flange portion 7, and smoothly increases the flow passage area of the fluid constricted by the needle valve portion 32. ing. The flange 7 is shown in FIG.
As illustrated in FIG.
The rib 31 extends and has a ring-shaped fixing portion 19 on the outer periphery thereof, and a cutout 8 is formed on the back surface side of the fixing portion 19.
【００１２】上記のように、ニードル弁体６を弁本体３
に挿入後、更にスプリング１５をニードル弁体のガイド
筒部２６に挿入した状態は図５に示されており、ここに
図２に示すようにスリーブ１０に弁座体１２を嵌合した
組立体を弁本体３の流入口１側から挿入する。この時、
スプリング１５の第１端部１６側は、弁座体１２のばね
ガイド筒１４の外周に位置し、このスプリング１５は、
上記組立体の弁本体３への挿入に伴ってばね受け凹部２
０の底面２１と弁座体１２のリブ１７間で圧縮され、弁
座体１２に対して初期バイアスを付与している。最後に
止輪２２を弁本体３の流入口１側から径を押し縮めた状
態で挿入し、弁本体３の止輪係止溝４部分で拡開するこ
とにより、止輪２２を止輪係止溝４に係止することがで
き、それによって弁本体３に組み込まれた各部材の固定
がなされる。As described above, the needle valve 6 is connected to the valve body 3.
FIG. 5 shows a state in which the spring 15 is further inserted into the guide cylinder portion 26 of the needle valve body after insertion into the valve body. As shown in FIG. Is inserted from the inlet 1 side of the valve body 3. At this time,
The first end 16 side of the spring 15 is located on the outer periphery of the spring guide cylinder 14 of the valve seat body 12, and this spring 15
As the assembly is inserted into the valve body 3, the spring receiving recess 2
The pressure is compressed between the bottom surface 21 of the valve seat 0 and the rib 17 of the valve seat body 12, and gives an initial bias to the valve seat body 12. Finally, the retaining ring 22 is inserted from the inflow port 1 side of the valve body 3 in a state where the diameter is reduced, and is expanded at the retaining ring locking groove 4 portion of the valve body 3, so that the retaining ring 22 is engaged with the retaining ring. It can be locked in the stop groove 4, thereby fixing the members incorporated in the valve body 3.
【００１３】このようにして組み立てられた定流量弁３
５の使用に際して、流体の圧力に対応した作動は、図６
乃至図８に示している。すなわち、図６は定流量弁の初
期位置を示し、また、流体の圧力がきわめて低い状態を
示す。この時には、スプリング１５が圧縮されてセット
されている初期バイアスにより、弁座体１２を流入口１
側に押圧しており、それにより弁座体１２の切欠部１３
がスリーブ１０の段部１１に係合し当接している。この
時、弁座体１２の先端の弁座部２４は、固定されている
ニードル弁体６のニードル弁部３２外周のテーパ面２３
の先端に位置し、弁座部２４とテーパ面２３との間隙２
８が最も大きい状態となっている。この時流入口１から
の流体は、上記のように間隙２８を通り、ほぼテーパ面
２３に沿って流れ、ニードル弁体６のリブ３１の間を通
り、流出口２へ流れる。The constant flow valve 3 thus assembled
In operation of FIG. 5, the operation corresponding to the fluid pressure is performed as shown in FIG.
8 to FIG. That is, FIG. 6 shows the initial position of the constant flow valve, and shows a state in which the pressure of the fluid is extremely low. At this time, the valve seat body 12 is moved to the inlet port 1 by the initial bias set by compressing the spring 15.
Side of the valve seat 12
Are engaged with and abutted on the step portion 11 of the sleeve 10. At this time, the valve seat portion 24 at the tip of the valve seat body 12 is tapered on the outer periphery of the needle valve portion 32 of the fixed needle valve body 6.
Of the valve seat 24 and the tapered surface 23
8 is the largest state. At this time, the fluid from the inflow port 1 passes through the gap 28 as described above, flows substantially along the tapered surface 23, passes between the ribs 31 of the needle valve body 6, and flows to the outflow port 2.
【００１４】流体の圧力が強くなると、その流体が弁座
体１２の背面、即ち図２（ｂ）に示すように、ばねガイ
ド筒１４、リブ１７，その外周の弁座筒２７の各背面に
作用し、その力がスプリング１５の初期バイアスより大
きくなるとその力に応じてスプリング１５が圧縮され、
弁座体１２は図６中において右方向に移動する。それに
より、弁座筒２７の先端の弁座部２４は、図７及び図８
に示すように、ニードル弁体６のテーパ面２３の大径側
に移動する。その結果、弁座部２４とテーパ面２３との
間隙２８は次第に小さくなり、流路は絞られる。即ち、
流体の圧力が大きいほど流路は絞られ、流量は常に一定
に保たれる。流体の圧力が最も高い状態においては、ニ
ードル弁体６の先端４０が弁座体１２のリブ１７に当接
し、前記間隙２８は最も狭くなる。この時、流体の圧力
は、弁座体１２に対して、上記のように、ばねガイド筒
１４、リブ１７，その外周の弁座筒２７の各背面に作用
し、図１１に示す従来の定流量弁のように、弁座体の背
面全体に作用するものよりは受圧面積を小さくすること
ができ、流体の圧力変動に過度に追従して弁座体が移動
しハンチングを生じることを防止することができる。When the pressure of the fluid increases, the fluid is applied to the back surface of the valve seat body 12, that is, as shown in FIG. 2 (b), the spring guide tube 14, the rib 17, and the back surface of the valve seat tube 27 on the outer periphery. When the force becomes larger than the initial bias of the spring 15, the spring 15 is compressed according to the force,
The valve seat body 12 moves rightward in FIG. As a result, the valve seat portion 24 at the tip of the valve seat cylinder 27 is
As shown in (2), the needle valve 6 moves to the large diameter side of the tapered surface 23. As a result, the gap 28 between the valve seat 24 and the tapered surface 23 gradually decreases, and the flow path is narrowed. That is,
The higher the pressure of the fluid, the narrower the flow path, and the flow rate is always kept constant. In a state where the pressure of the fluid is the highest, the tip end 40 of the needle valve body 6 comes into contact with the rib 17 of the valve seat body 12, and the gap 28 becomes the narrowest. At this time, the pressure of the fluid acts on the respective back surfaces of the spring guide cylinder 14, the rib 17, and the valve seat cylinder 27 on the outer periphery of the valve seat body 12 as described above, and the conventional constant pressure shown in FIG. The pressure receiving area can be made smaller than that which acts on the entire back surface of the valve seat body, such as a flow valve, and prevents the valve seat body from moving excessively following the pressure fluctuation of the fluid and causing hunting. be able to.
【００１５】上記のように作用する定流量弁において、
その中を流れる流体は、図６乃至図８に矢印で示すよう
に流れる。すなわち、図６に示すように、流入口１から
弁座体１２のリブ１７の間隙を通り、ニードル弁体６の
先端４０からニードル弁部３２の外周面に案内されてそ
のテーパ面に沿って流れる。この流れは、図６乃至図８
に示すように、流体の圧力に応じて移動する弁座体１２
の先端の弁座部２４の位置で最も流路が絞られ、その後
ニードル弁部３２のテーパ面２３に沿って流れ、ニード
ル弁体６のリブ３１の間隙を通り、弁本体３の流出口２
に至り、ここでニードル弁体６の外周を流れてきた流体
が全て合流する。このような流れ方は図６乃至図８に示
すように、弁座体１２の位置に関わらず同様に流れ、全
ての状態で合流部での流体の衝突が少なくなる。したが
って、前記従来の図１０、図１１に示す定流量弁のよう
に、弁本体内における最も外周に位置する部分で絞られ
た後、中心に向けて流れるものとは異なり、合流部での
流体の衝突による騒音の発生を減少させることができ
る。また、このような流体の流れにおいては、スプリン
グ１５を通る流体はほとんどなく、スプリングの外周に
沿って流れるので、図１０，図１１に示す従来の定流量
弁のように、スプリングを横切ることによる流体の騒音
の発生を防止することができる。In the constant flow valve acting as described above,
The fluid flowing therethrough flows as shown by the arrows in FIGS. That is, as shown in FIG. 6, from the inflow port 1, through the gap between the ribs 17 of the valve seat body 12, from the tip end 40 of the needle valve body 6 to the outer peripheral surface of the needle valve portion 32, along the tapered surface Flows. This flow is shown in FIGS.
As shown in FIG. 2, the valve seat body 12 that moves in accordance with the pressure of the fluid
The flow path is most narrowed at the position of the valve seat 24 at the tip of the valve body 3, then flows along the tapered surface 23 of the needle valve 32, passes through the gap between the ribs 31 of the needle valve body 6, and flows out of the outlet 2 of the valve body 3.
, And all the fluids flowing on the outer periphery of the needle valve body 6 are merged. As shown in FIGS. 6 to 8, such a flow is similar regardless of the position of the valve seat 12, and the collision of the fluid at the merging portion is reduced in all the states. Therefore, unlike the conventional constant flow valve shown in FIGS. 10 and 11, the flow is restricted at the outermost portion in the valve body and then flows toward the center. Noise due to the collision of the vehicle can be reduced. Further, in such a flow of the fluid, almost no fluid passes through the spring 15 and flows along the outer periphery of the spring, so that the fluid flows across the spring as in the conventional constant flow valve shown in FIGS. Generation of fluid noise can be prevented.
【００１６】従来の定流量弁と、本発明による定流量弁
との騒音の状態を比較するため、流体の圧力と発生する
騒音の特性を実験により求めた結果のグラフを図９に示
す。このグラフから明らかなように、従来の定流量弁に
おいては、流体の圧力が０の状態から０．５（ｋｇｆ／
ｃｍ２）までの間は実験時の基本騒音状態である暗騒音
の４８ｄＢであるが、それ以降は、圧力が増大するにつ
れて大きな騒音を発生するのに対して、本発明による定
流量弁においては、圧力が０の状態から３（ｋｇｆ／ｃ
ｍ２）までの間は上記暗騒音の状態でほとんど騒音を発
生することがなく、それ以降圧力が増大するにつれて騒
音が大きくなる、という特性を示す。このように、３
（ｋｇｆ／ｃｍ２）以降において発生する騒音は、従来
の定流量弁より小さな値を示しており、しかも本発明に
よる定流量弁は、圧力が上昇して騒音を発生するに至っ
ても、従来のものよりもその騒音は小さいことがわか
る。FIG. 9 is a graph showing the results of experiments on the characteristics of the pressure of the fluid and the noise generated in order to compare the state of noise between the conventional constant flow valve and the constant flow valve according to the present invention. As is clear from this graph, in the conventional constant flow valve, the pressure of the fluid is changed from 0 to 0.5 (kgf / kg).
cm 2 ), which is 48 dB of background noise, which is the basic noise state at the time of the experiment. After that, loud noise is generated as the pressure increases, whereas in the constant flow valve according to the present invention, , 3 (kgf / c
Until m 2 ), almost no noise is generated in the background noise state, and thereafter, the noise increases as the pressure increases. Thus, 3
The noise generated after (kgf / cm 2 ) shows a smaller value than that of the conventional constant flow valve, and the constant flow valve according to the present invention has the conventional constant flow valve even if the pressure increases and the noise is generated. It turns out that the noise is smaller than the thing.
【００１７】[0017]
【発明の効果】請求項１に係る発明においては、定流量
弁内を流れる流体は、ニードル弁部のテーパ状の外周面
に沿って流れ、弁座体とニードル弁部の外周の間隙で絞
られた後、再びニードル弁部のテーパ面に沿って流れ、
その後ニードル弁体周囲からの流体が合流するので、従
来のように弁本体内の流路の最も外側から中心に向かう
流体相互の合流による衝突がなくなり、流れが円滑とな
るので騒音の発生を減少させることができる。また、弁
座体の内周に流路を形成したので、弁座体の受圧面積が
減少するので、従来のように弁座体の受圧面積が大きい
ことにより、流体の細かな圧力変動に追従して過度の定
流量調整を行い、弁座体が振動してハンチングを生じる
こと防止することができる。また、正確な形状を要求さ
れるニードル弁部がニードル弁体の外周に形成されるの
で、従来のように弁本体の内周側に形成されるものと異
なり、精度の確認等が容易となり、製造が容易となる。
更に、スプリングをニードル弁部への流れを遮らない位
置に配置することができるので、流体の流れが円滑とな
り、この点でも騒音の発生が防止される。According to the first aspect of the invention, the fluid flowing through the constant flow valve flows along the tapered outer peripheral surface of the needle valve portion, and is restricted by the gap between the valve seat and the outer periphery of the needle valve portion. After that, it flows along the tapered surface of the needle valve again,
After that, the fluid from around the needle valve body merges, so that collisions due to the merge of fluids flowing from the outermost to the center of the flow path in the valve body as in the past are eliminated, making the flow smoother and reducing noise generation Can be done. In addition, since the flow passage is formed on the inner periphery of the valve seat, the pressure receiving area of the valve seat is reduced. Thus, excessive constant flow rate adjustment can be performed to prevent the valve seat body from vibrating and causing hunting. In addition, since the needle valve portion which requires an accurate shape is formed on the outer periphery of the needle valve body, unlike the conventional one formed on the inner peripheral side of the valve body, it becomes easy to confirm accuracy and the like, Manufacturing becomes easy.
Furthermore, since the spring can be arranged at a position where the flow to the needle valve portion is not blocked, the flow of the fluid is smooth, and the generation of noise is also prevented in this respect.
【００１８】また、請求項２に係る発明においては、弁
本体内にスリーブを固定し、スリーブ内壁に弁座体を摺
動自在に設けたので、弁座体が摺動する部材を精密に製
造することができると共に、ニードル弁体等の組付けが
容易となる。また、請求項３に係る発明においては、ニ
ードル弁体の中心部にばね受け凹部を設けたので、弁本
体内に延びるニードル弁体の中心部に凹部が形成され、
軽量化することができると共に、その凹部をスプリング
収納部として有効に活用することができ、且つ、弁座体
間に縮設するスプリングの突出長さを減少させることが
でき、全体を小型化することができる。According to the second aspect of the present invention, since the sleeve is fixed in the valve body and the valve seat is slidably provided on the inner wall of the sleeve, the member on which the valve seat slides is precisely manufactured. And the assembling of the needle valve body and the like becomes easy. In the invention according to claim 3, since the spring receiving recess is provided at the center of the needle valve body, a recess is formed at the center of the needle valve body extending into the valve body,
The weight can be reduced, the concave portion can be effectively used as a spring storage portion, and the length of the spring that is contracted between the valve seats can be reduced, so that the overall size can be reduced. be able to.
【００１９】また、請求項４に係る発明においては、ニ
ードル弁体に設けたフランジ部の一方の面を弁本体内の
支持突起に当接させ、他方の面にスリーブの先端部を当
接し、該支持突起とスリーブによりフランジを挟持して
ニードル弁体を固定したので、ニードル弁体の特別な固
定手段を必要とせず、構造を簡素化することができ、組
立が容易となる。また、請求項５に係る発明において
は、弁座体の中心部にスプリングが嵌合するばねガイド
筒を設けたので、スプリングの伸縮作動が安定し、流体
の圧力を受けて移動する弁座体の作動を安定化すること
ができる。Further, in the invention according to claim 4, one surface of the flange portion provided on the needle valve body is brought into contact with the support projection in the valve body, and the tip of the sleeve is brought into contact with the other surface. Since the needle valve element is fixed by holding the flange between the support projection and the sleeve, no special fixing means for the needle valve element is required, the structure can be simplified, and the assembly is facilitated. In the invention according to claim 5, since the spring guide cylinder in which the spring is fitted is provided at the center of the valve seat body, the expansion and contraction operation of the spring is stabilized, and the valve seat body which moves by receiving the pressure of the fluid. Operation can be stabilized.
【図１】本発明による定流量弁の実施例の断面図であ
る。FIG. 1 is a sectional view of an embodiment of a constant flow valve according to the present invention.
【図２】本発明による定流量弁の弁座体をシリンダに組
み込む前の状態を示す図であり、（ａ）はシリンダの断
面図、（ｂ）は弁座体の側面図、（ｃ）は弁座体の断面
図である。FIGS. 2A and 2B are views showing a state before a valve seat body of a constant flow valve according to the present invention is incorporated into a cylinder, wherein FIG. 2A is a sectional view of the cylinder, FIG. 2B is a side view of the valve seat body, and FIG. FIG. 4 is a sectional view of a valve seat body.
【図３】本発明による定流量弁のニードル弁体とスプリ
ングとを弁本体に組み込む前の状態を示す図である。FIG. 3 is a view showing a state before a needle valve body and a spring of a constant flow valve according to the present invention are incorporated into a valve body.
【図４】本発明による定流量弁のニードル弁体を示す図
であり、（ａ）は一部断面を示す正面図、（ｂ）は側面
図である。4A and 4B are diagrams showing a needle valve body of a constant flow valve according to the present invention, wherein FIG. 4A is a front view showing a partial cross section, and FIG. 4B is a side view.
【図５】本発明による定流量弁の組立時の状態を示す断
面図ある。FIG. 5 is a cross-sectional view showing a state when the constant flow valve according to the present invention is assembled.
【図６】本発明の定流量弁において流体が流れる初期状
態、または流体の圧力が極めて低い状態の弁体の位置及
び流体の流れを示す断面図である。FIG. 6 is a cross-sectional view showing a position of a valve body and a flow of a fluid in an initial state where a fluid flows or in a state where a pressure of the fluid is extremely low in the constant flow valve of the present invention.
【図７】本発明の定流量弁において流体の圧力が中程度
の状態の弁座体の位置及び流体の流れを示す断面図であ
る。FIG. 7 is a sectional view showing a position of a valve seat body and a flow of a fluid in a state where the pressure of the fluid is medium in the constant flow valve of the present invention.
【図８】本発明の定流量弁において流体の圧力が高い状
態の弁座体の位置及び流体の流れを示す断面図である。FIG. 8 is a cross-sectional view showing a position of a valve seat body and a flow of a fluid in a state where the pressure of the fluid is high in the constant flow valve of the present invention.
【図９】従来の定流量弁と本発明による定流量弁の騒音
発生特性を比較して示すグラフである。FIG. 9 is a graph showing a comparison between noise generation characteristics of a conventional constant flow valve and a constant flow valve according to the present invention.
【図１０】従来の定流量弁における初期状態を示す断面
図である。FIG. 10 is a sectional view showing an initial state of a conventional constant flow valve.
【図１１】従来の定流量弁における流量調整状態の弁座
体の位置及び流体の流れを示す断面図である。FIG. 11 is a cross-sectional view showing a position of a valve seat body and a flow of fluid in a flow rate adjusting state in a conventional constant flow valve.
３ 弁本体 ６ ニードル弁体 ７ フランジ部 １０ スリーブ １２ 弁座体 １５ スプリング ２４ 弁座部 ２６ ガイド筒部 ３２ ニードル弁部 ３５ 定流量弁 3 Valve body 6 Needle valve 7 Flange 10 Sleeve 12 Valve seat 15 Spring 24 Valve seat 26 Guide cylinder 32 Needle valve 35 Constant flow valve
Claims (5)
テーパ面を外周に有するニードル弁部を備え、弁本体内
の流路の中心に固定したニードル弁体と、 内部に流路が形成され、該ニードル弁部の外周と間隙を
有する弁座部を備え、流路の軸線に沿って摺動自在に設
けた弁座体と、 弁座体とニードル弁体間に縮設したスプリングとからな
ることを特徴とする定流量弁。A needle valve body having a tapered surface on an outer periphery having a diameter increasing from an upstream side to a downstream side, and a needle valve body fixed to a center of a flow path in a valve body; A valve seat body formed and provided with a gap with the outer periphery of the needle valve body, the valve seat body slidably provided along the axis of the flow path, and a spring contracted between the valve seat body and the needle valve body And a constant flow valve.
内壁に弁座体を摺動自在に設けてなる請求項１記載の定
流量弁。2. The constant flow valve according to claim 1, wherein a sleeve is fixed in the valve body, and a valve seat is slidably provided on the inner wall of the sleeve.
設け、スプリングを該ばね受け凹部の底面と弁座体間に
縮設してなる請求項１又は請求項２記載の定流量弁。3. The constant flow valve according to claim 1, wherein a spring receiving recess is provided at a center portion of the needle valve body, and a spring is contracted between a bottom surface of the spring receiving recess and the valve seat body.
の面を弁本体内の支持突起に当接させ、他方の面にスリ
ーブの先端部を当接し、該支持突起とスリーブによりフ
ランジを挟持してニードル弁体を固定してなる請求項２
又は請求項３記載の定流量弁。4. A flange provided on the needle valve body has one surface in contact with a support protrusion in the valve body, the other surface in contact with the tip of a sleeve, and the flange is sandwiched between the support protrusion and the sleeve. 3. The needle valve body is fixed by pressing.
Or the constant flow valve according to claim 3.
ばねガイド筒を設けてなる請求項１乃至請求項４のいず
れかに記載の定流量弁。5. The constant flow valve according to claim 1, wherein a spring guide cylinder in which a spring is fitted is provided at a central portion of the valve seat body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10333654A JP2000161512A (en) | 1998-11-25 | 1998-11-25 | Constant flow rate valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10333654A JP2000161512A (en) | 1998-11-25 | 1998-11-25 | Constant flow rate valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000161512A true JP2000161512A (en) | 2000-06-16 |
Family
ID=18268486
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10333654A Pending JP2000161512A (en) | 1998-11-25 | 1998-11-25 | Constant flow rate valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000161512A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006125558A (en) * | 2004-10-29 | 2006-05-18 | Koatsu Co Ltd | Constant flow valve |
| JP2010112560A (en) * | 2009-12-28 | 2010-05-20 | Koatsu Co Ltd | Constant flow valve |
| WO2010098621A2 (en) * | 2009-02-26 | 2010-09-02 | Woongjin Coway Co., Ltd. | Valve for regulating water quantity |
| JP2012233592A (en) * | 2012-08-06 | 2012-11-29 | Koatsu Co Ltd | Constant flow rate valve |
| CN103527829A (en) * | 2013-10-18 | 2014-01-22 | 项大利 | Fluid pressure stabilizing valve |
| CN105909770A (en) * | 2016-06-17 | 2016-08-31 | 福士汽车零部件（济南）有限公司 | Flow control device for lubricating system of dual-clutch transmission |
-
1998
- 1998-11-25 JP JP10333654A patent/JP2000161512A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006125558A (en) * | 2004-10-29 | 2006-05-18 | Koatsu Co Ltd | Constant flow valve |
| WO2010098621A2 (en) * | 2009-02-26 | 2010-09-02 | Woongjin Coway Co., Ltd. | Valve for regulating water quantity |
| WO2010098621A3 (en) * | 2009-02-26 | 2010-12-09 | Woongjin Coway Co., Ltd. | Valve for regulating water quantity |
| CN102333980A (en) * | 2009-02-26 | 2012-01-25 | 熊津豪威株式会社 | Valve for regulating water quantity |
| JP2010112560A (en) * | 2009-12-28 | 2010-05-20 | Koatsu Co Ltd | Constant flow valve |
| JP2012233592A (en) * | 2012-08-06 | 2012-11-29 | Koatsu Co Ltd | Constant flow rate valve |
| CN103527829A (en) * | 2013-10-18 | 2014-01-22 | 项大利 | Fluid pressure stabilizing valve |
| CN103527829B (en) * | 2013-10-18 | 2015-12-23 | 项大利 | A kind of fluid pressure maintaining valve |
| CN105909770A (en) * | 2016-06-17 | 2016-08-31 | 福士汽车零部件（济南）有限公司 | Flow control device for lubricating system of dual-clutch transmission |
| CN105909770B (en) * | 2016-06-17 | 2019-03-15 | 福士汽车零部件（济南）有限公司 | A kind of double clutch gearbox lubricating system volume control device |
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