JP2010175017A - Constant flow rate valve - Google Patents

Constant flow rate valve Download PDF

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JP2010175017A
JP2010175017A JP2009020052A JP2009020052A JP2010175017A JP 2010175017 A JP2010175017 A JP 2010175017A JP 2009020052 A JP2009020052 A JP 2009020052A JP 2009020052 A JP2009020052 A JP 2009020052A JP 2010175017 A JP2010175017 A JP 2010175017A
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constant flow
flow valve
valve
valve body
diameter end
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JP5341539B2 (en
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Satoshi Washimi
敏史 鷲見
Makoto Iwamoto
誠 岩本
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Fuji Bellows Co Ltd
Fuji Seiko Co Ltd
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Fuji Bellows Co Ltd
Fuji Seiko Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a constant flow rate valve, which is reduced in size so that it can be set in a water supply facility with a large requested flow rate or a supply facility limited in setting space. <P>SOLUTION: The constant flow rate valve includes a conically shaped coil spring that forms a valve element, a casing which forms a flow passage of fluid and stores the coil spring within the flow passage so that the minor diameter end side of the coil spring is turned to the upstream side, and a bypass which flows fluid separately from the fluid passing each space between windings of the coil spring. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、定流量弁に係り、特に、水を代表とする流体を、その供給圧力の変動に拘わらず一定流量で装置へ供給することができる定流量弁に関する。   The present invention relates to a constant flow valve, and more particularly to a constant flow valve capable of supplying a fluid typified by water to a device at a constant flow rate regardless of fluctuations in supply pressure.

例えば、給湯用温水器等の給水設備には、水道水の供給圧力にバラツキがあっても一定流量で水道水を給水設備に供給できるように定流量弁が備え付けられている。従来の定流量弁では、流体の流路内に円錐形状のコイル状バネからなる弁体が設置されており、この弁体が流体の圧力変動に伴って伸縮動作することで、コイル状バネの各巻線間の隙間が変動し、当該隙間を通過する流体を一定流量とするようになっている（例えば特許文献１参照）。   For example, a water supply facility such as a hot water heater is equipped with a constant flow valve so that tap water can be supplied to the water supply facility at a constant flow rate even if the supply pressure of the tap water varies. In a conventional constant flow valve, a valve body composed of a conical coil spring is installed in a fluid flow path, and this valve body expands and contracts in accordance with fluid pressure fluctuations. The gap between the windings varies, and the fluid passing through the gap has a constant flow rate (see, for example, Patent Document 1).

特開平６−２３５４７０号公報JP-A-6-235470

ここで、近年においては、定流量弁自体の小型化が望まれている。特に、従来の定流量弁であると、要求流量によってはコイル状バネを大型にしなければ吐水できるだけの各巻線間の隙間を確保できない。このため、要求流量の大きい給水設備に対しては定流量弁が大型になってしまう。さらには、設置スペースに制約がある給水設備であると定流量弁を適用することができないという問題もある。
このため、本発明の課題は、要求流量の大きい給水設備や、設置スペースに制約のある供給設備に対しても設置できるように、小型化の可能な定流量弁を提供することである。 Here, in recent years, downsizing of the constant flow valve itself is desired. In particular, in the case of a conventional constant flow valve, depending on the required flow rate, a gap between the windings that can discharge water cannot be secured unless the coil spring is made large. For this reason, a constant flow valve will become large with respect to the water supply equipment with a large request | requirement flow volume. Furthermore, there is also a problem that a constant flow valve cannot be applied to a water supply facility with a limited installation space.
For this reason, the subject of this invention is providing the constant flow valve which can be reduced in size so that it can install also in the water supply equipment with a large request | requirement flow volume, or the supply equipment with restrictions in installation space.

請求項１記載の発明に係る定流量弁は、
弁体をなす円錐形状のコイル状バネと、
流体の流路を形成し、前記コイル状バネの小径端部側が前記流路の上流側を向くように当該コイル状バネを前記流路内に収容する筐体と、
前記コイル状バネの各巻線間を通過する流体とは別個に流体を流すバイパスとを備えることを特徴としている。 The constant flow valve according to the invention of claim 1 is:
A conical coil spring forming a valve body;
Forming a fluid flow path, and housing the coiled spring in the flow path so that the small diameter end portion side of the coiled spring faces the upstream side of the flow path;
And a bypass for flowing the fluid separately from the fluid passing between the windings of the coil spring.

請求項２記載の発明は、請求項１記載の定流量弁において、
前記筐体には、前記コイル状バネの大径端部における最外周部分の少なくとも一部を固定する固定部が設けられていることを特徴としている。 The invention according to claim 2 is the constant flow valve according to claim 1,
The casing is provided with a fixing portion for fixing at least a part of the outermost peripheral portion of the large-diameter end portion of the coil spring.

請求項３記載の発明は、請求項２記載の定流量弁において、
前記コイル状バネの小径端部には、当該小径端部を閉塞する閉塞部材が取り付けられており、
前記バイパスは、前記筐体の外壁内に形成されていることを特徴としている。 The invention according to claim 3 is the constant flow valve according to claim 2,
A closing member for closing the small diameter end is attached to the small diameter end of the coiled spring,
The bypass is formed in the outer wall of the housing.

請求項４記載の発明は、請求項２記載の定流量弁において、
前記コイル状バネの小径端部には、前記バイパスとなる通過孔が形成されていることを特徴としている。 The invention according to claim 4 is the constant flow valve according to claim 2,
A passage hole serving as the bypass is formed in a small diameter end portion of the coil spring.

請求項５記載の発明は、請求項１記載の定流量弁において、
前記流路内で前記コイル状バネを支持して、当該コイル状バネの伸縮動作をガイドするガイド軸を備え、
前記ガイド軸には、前記バイパスとなる貫通孔が形成されていることを特徴としている。 The invention according to claim 5 is the constant flow valve according to claim 1,
A guide shaft that supports the coiled spring in the flow path and guides the expansion and contraction of the coiled spring;
The guide shaft is formed with a through hole serving as the bypass.

本発明によれば、コイル状バネの各巻線間を通過する流体とは別個に流体を流すバイパスが設けられているので、コイル状バネ側の流量以外にもバイパスによって流量を確保することができる。これにより、要求流量の大きな給水設備であっても、大型とせずに定流量弁を適用することが可能となる。
そして、コイル状バネを小型にしたとしても一般的な要求流量は確保することはできる。このようにコイル状バネの小型化が図られると、定流量弁自体の小型化も可能となり、設置スペースに制約のある給水設備等に対しても定流量弁を適用することが可能となる。 According to the present invention, since the bypass for flowing the fluid separately from the fluid passing between the windings of the coil spring is provided, the flow rate can be secured by the bypass in addition to the flow rate on the coil spring side. . Thereby, even if it is a water supply installation with a big request | requirement flow volume, it becomes possible to apply a constant flow valve, without making it large.
And even if it makes a coil-shaped spring small, a general request | required flow volume can be ensured. If the coil spring is miniaturized in this way, the constant flow valve itself can be miniaturized, and the constant flow valve can be applied to a water supply facility with limited installation space.

本実施形態の定流量弁の概略構成を示す上面図である。It is a top view which shows schematic structure of the constant flow valve of this embodiment. 図１のII−II断面図である。It is II-II sectional drawing of FIG. 図２の定流量弁の通水状態を示す断面図である。It is sectional drawing which shows the water flow state of the constant flow valve of FIG. 本実施形態の定流量弁の第一の変形例を示す上面図である。It is a top view which shows the 1st modification of the constant flow valve of this embodiment. 図４のV−V断面図である。It is VV sectional drawing of FIG. 本実施形態の定流量弁の第二の変形例を示す断面図である。It is sectional drawing which shows the 2nd modification of the constant flow valve of this embodiment. 本実施形態の定流量弁の第三の変形例を示す断面図である。It is sectional drawing which shows the 3rd modification of the constant flow valve of this embodiment.

以下、図を参照して本発明を実施するための最良の形態を詳細に説明する。図１は、本実施形態の定流量弁の概略構成を示す上面図であり、図２は図１におけるII−II断面図である。   Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the drawings. FIG. 1 is a top view showing a schematic configuration of the constant flow valve of the present embodiment, and FIG. 2 is a sectional view taken along line II-II in FIG.

図１及び図２に示すように定流量弁１は、弁体２と、流体の流路３を形成し、流路３内に弁体２を収容する筐体４とを有する。   As shown in FIGS. 1 and 2, the constant flow valve 1 includes a valve body 2 and a housing 4 that forms a fluid flow path 3 and accommodates the valve body 2 in the flow path 3.

弁体２は、金属製の円錐形状のコイル状バネであり、その小径端部２１側が流路３の上流側を向くように流路３内に配置されている。この弁体２は、その変位量に対する通過孔面積の変化状況の特性が、収縮するにしたがって減少する右下がりの非線形特性である。また、弁体２の小径端部２１には、当該小径端部２１の内側空間を閉塞する閉塞部材としてのバネ受け部２３が組み付けられている。このバネ受け部２３の外周部には緩衝部材２４が支持されている。   The valve body 2 is a metal conical coiled spring, and is disposed in the flow path 3 so that the small diameter end 21 side faces the upstream side of the flow path 3. This valve body 2 is a non-linear characteristic with a downward slope that the characteristic of the change state of the passage hole area with respect to the displacement amount decreases as it contracts. Further, a spring receiving portion 23 as a closing member for closing the inner space of the small diameter end portion 21 is assembled to the small diameter end portion 21 of the valve body 2. A buffer member 24 is supported on the outer periphery of the spring receiving portion 23.

緩衝部材２４は、柔軟性のある合成ゴムや合成樹脂製でプロペラ形状のものである。緩衝部材２４は、中央部に貫通孔を有する円板状の座板２５と、座板２５の周囲から放射方向（例えば座板２５の直径方向に対向する２本）に延びた羽２６とによって構成されていて、弁体２のサージングを防止する機能を備えたものである。   The buffer member 24 is made of flexible synthetic rubber or synthetic resin and has a propeller shape. The buffer member 24 includes a disc-shaped seat plate 25 having a through-hole in the center and wings 26 extending from the periphery of the seat plate 25 in a radial direction (for example, two facing the diameter direction of the seat plate 25). It is comprised and the function which prevents the surging of the valve body 2 is provided.

筐体４は、図示しない給水管路内に配置される筒状を成す合成樹脂製のもので、給水管路に当接してゴムパッキンにより気密に嵌合している。なお、筐体４は金属製やゴム製であってもよい。なお、設計条件によってはゴムパッキンを省略することも可能である。そして、この筐体４は、筒状の筐体本体４１と、筐体本体４１の内側に配置された筒状のホルダー４２とを備えている。   The casing 4 is made of a synthetic resin having a cylindrical shape arranged in a water supply pipe (not shown), and is in contact with the water supply pipe and is airtightly fitted with a rubber packing. Note that the housing 4 may be made of metal or rubber. Note that the rubber packing may be omitted depending on the design conditions. The casing 4 includes a cylindrical casing main body 41 and a cylindrical holder 42 disposed inside the casing main body 41.

筐体本体４１の内側下部には、弁体２が載置される台座４３が設けられている。台座４３は内側に向かって突出しており、この台座４３の上面には、弁体２の大径端部２７が接触し、さらに大径端部２２を介してホルダー４２も載置される。この際、図２に示すように弁体２の大径端部２７の最外周部分の一部が、ホルダー４２と台座４３とによって上下方向で挟持され、弁体２が固定される。つまり、台座４３及びホルダー４２が本発明に係る固定部である。
また、筐体本体４１の壁部の前後左右には、上下方向に沿った溝４４が形成されている。ホルダー４２が筐体本体４１に嵌合すると、ホルダー４２と溝４４のそれぞれの内部空間が仕切られる。ホルダー４２の内部空間が上記の流路３となり、溝４４の内部空間が流路３とは別個に流体を流すバイパスとなる。これにより、バイパスは筐体４の外壁内に形成されることになり、このバイパスによって弁体２の各巻線間を通過する流体とは別個に流体を流すことが可能となる。 A pedestal 43 on which the valve body 2 is placed is provided at the inner lower portion of the housing body 41. The pedestal 43 protrudes inward. The large diameter end portion 27 of the valve body 2 contacts the upper surface of the pedestal 43, and the holder 42 is also placed via the large diameter end portion 22. At this time, as shown in FIG. 2, a part of the outermost peripheral portion of the large-diameter end portion 27 of the valve body 2 is sandwiched between the holder 42 and the pedestal 43 in the vertical direction, and the valve body 2 is fixed. That is, the pedestal 43 and the holder 42 are the fixing portions according to the present invention.
Grooves 44 are formed along the vertical direction on the front, rear, left and right sides of the wall portion of the housing body 41. When the holder 42 is fitted into the housing body 41, the internal spaces of the holder 42 and the groove 44 are partitioned. The internal space of the holder 42 is the above-described flow path 3, and the internal space of the groove 44 is a bypass for flowing a fluid separately from the flow path 3. Thereby, a bypass is formed in the outer wall of the housing | casing 4, It becomes possible to flow a fluid separately from the fluid which passes between each coil | winding of the valve body 2 by this bypass.

次に、本実施形態の作用について説明する。
使用開始前の状態（図２参照）で給水管路から定流量弁１に流体が流れ込むと、ほとんどの流体が流路３を通過し、一部の流体がバイパスを通過する。ここで、流路３内を流れる流体から水圧を受けると、弁体２は、受圧面積で圧を感知して、バネ力に抗しながら下流側に向かって応動する。例えば水圧が最小のときは、図２に示すように使用開始直後のときであり、弁体２は最も伸張した状態となっている。弁体２の各巻線の間隔は最も大きいために小さい水圧でも一定の流量が確保される。一方、水圧が最大のときには図３に示すように、弁体２が最も収縮した状態となっている。この際、弁体２の各巻線間の間隔も最も小さくなって流量が増加することなく一定の流量が確保される。通水中、水圧が変動した場合においても、その水圧変動に応動して弁体２が伸縮して各巻線の間隔も変動するため、一定の流量が確保される。このようなことで流量コントロールが安定する。 Next, the operation of this embodiment will be described.
When fluid flows into the constant flow valve 1 from the water supply line in a state before starting use (see FIG. 2), most of the fluid passes through the flow path 3 and some of the fluid passes through the bypass. Here, when water pressure is received from the fluid flowing in the flow path 3, the valve body 2 senses the pressure in the pressure receiving area and reacts toward the downstream side against the spring force. For example, when the water pressure is minimum, as shown in FIG. 2, it is immediately after the start of use, and the valve body 2 is in the most expanded state. Since the interval between the windings of the valve body 2 is the largest, a constant flow rate is ensured even with a small water pressure. On the other hand, when the water pressure is maximum, as shown in FIG. 3, the valve body 2 is in the most contracted state. At this time, the interval between the windings of the valve body 2 is also minimized, and a constant flow rate is ensured without increasing the flow rate. Even when the water pressure fluctuates during passing water, the valve body 2 expands and contracts in response to the water pressure fluctuation, and the intervals between the windings also fluctuate, so that a constant flow rate is ensured. This will stabilize the flow control.

以上のように、本実施形態によれば、弁体２の各巻線間を通過する流体とは別個に流体を流すバイパスが設けられているので、弁体２側の流量以外にもバイパスによって流量を確保することができる。これにより、要求流量の大きな給水設備であっても、大型とせずに定流量弁を適用することが可能となる。
そして、弁体２を小型にしたとしても一般的な要求流量は確保することはできる。このように弁体２の小型化が図られると、定流量弁１自体の小型化も可能となり、設置スペースに制約のあって適用できなかった給水設備（例えばフラッシュバルブ式トイレ）等に対しても定流量弁１を適用することが可能となる。特にフラッシュバルブ式トイレの場合、従来では流量調整機構が必要であったが、定流量弁１を適用することにより、流量調整機構も省略することができる。これにより、流量調整機構の設置時に必要であった調節作業も削減でき、施工時間の短縮も可能となる。 As described above, according to the present embodiment, since the bypass for flowing the fluid separately from the fluid passing between the windings of the valve body 2 is provided, in addition to the flow rate on the valve body 2 side, the flow rate is also reduced by the bypass. Can be secured. Thereby, even if it is a water supply installation with a big request | requirement flow volume, it becomes possible to apply a constant flow valve, without making it large.
And even if it makes the valve body 2 small, a general request | requirement flow volume is securable. If the valve body 2 is miniaturized in this way, the constant flow valve 1 itself can be miniaturized. For a water supply facility (for example, a flush valve toilet) that cannot be applied due to a limited installation space. Also, the constant flow valve 1 can be applied. In particular, in the case of a flush valve type toilet, a flow rate adjustment mechanism has been conventionally required. However, by applying the constant flow valve 1, the flow rate adjustment mechanism can also be omitted. Thereby, the adjustment work required at the time of installation of the flow rate adjusting mechanism can be reduced, and the construction time can be shortened.

ここで、従来の定流量弁のように、ガイド軸により弁体を支持している場合、弁体を摺動しながら伸縮するので、摺動による摩耗や、コイル状バネとガイド軸との間に異物が介在することによって、コイル状バネの伸縮動作が変化し、流量特性が不安定となってしまうおそれがあった。しかしながら、本実施形態の定流量弁１のように、弁体２の大径端部２７の最外周部分が固定部により固定されていると、従来必要であったガイド軸を省略することができる。ガイド軸を省略できれば、ガイド軸に基づく不具合を防止することができ、定流量弁１の流量特性を安定化することができるだけでなく、部品点数の削減や省スペース化も図ることが可能となる。   Here, when the valve element is supported by the guide shaft as in the conventional constant flow valve, the valve element expands and contracts while sliding, so that wear due to sliding or between the coiled spring and the guide shaft. When foreign matter is present in the coil, the expansion / contraction operation of the coiled spring changes, and the flow rate characteristic may become unstable. However, when the outermost peripheral portion of the large-diameter end portion 27 of the valve body 2 is fixed by the fixing portion as in the constant flow valve 1 of the present embodiment, the conventionally required guide shaft can be omitted. . If the guide shaft can be omitted, problems based on the guide shaft can be prevented, the flow characteristics of the constant flow valve 1 can be stabilized, and the number of parts can be reduced and the space can be saved. .

なお、本発明は上記実施形態に限らず適宜変更可能であるのは勿論である。
例えば、本実施形態では、弁体２をなす円錐形状のコイル状バネを金属製としたが、ＳＭＡ（Shape Memory Alloy：形状記憶合金）製や合成樹脂製でもよい。 Of course, the present invention is not limited to the above-described embodiment and can be modified as appropriate.
For example, in the present embodiment, the conical coil spring forming the valve body 2 is made of metal, but may be made of SMA (Shape Memory Alloy) or synthetic resin.

また定流量弁１の具体的な配置の仕方や流量制御すべき流体の種類等も任意であり、その他、具体的な細部構造等についても適宜に変更可能であることは勿論である。
例えば、本実施形態では、固定部（ホルダー４２及び台座４３）によって、弁体２の大径端部２７の最外周部の一部が上下方向で挟持されることで、弁体２を固定した場合を例示しているが、固定方法はこれに限定されるものではない。例えば、大径端部２７の最外周部の一部を横方向で挟持する方法や、接着剤によって接着固定する方法、インサート成型による固定方法、モールドによる固定方法などが挙げられる。 The specific arrangement of the constant flow valve 1 and the type of fluid whose flow rate is to be controlled are arbitrary, and it is needless to say that the specific detailed structure can be changed as appropriate.
For example, in the present embodiment, the valve body 2 is fixed by sandwiching a part of the outermost peripheral portion of the large-diameter end portion 27 of the valve body 2 in the vertical direction by the fixing portion (the holder 42 and the base 43). Although the case is illustrated, the fixing method is not limited to this. For example, a method of sandwiching a part of the outermost peripheral portion of the large-diameter end portion 27 in the lateral direction, a method of bonding and fixing with an adhesive, a fixing method by insert molding, a fixing method by mold, and the like can be mentioned.

また、本実施形態では、筐体本体４１の溝４４とホルダー４２とがなす内部空間がバイパスである場合を例示して説明したが、図４及び図５に示す定流量弁１Ａのように、台座４３ａにおける、上から見て弁体２から露出した部分に複数の貫通溝６を形成して、その貫通溝６をバイパスとすることも可能である。貫通溝６は、弁体２の下流側で流路３と合流しているために、給水管路から定流量弁１Ａに流体が流れ込むと、ほとんどの流体が弁体２の各巻線間を通過するものの（図５中矢印Ｙ１参照）、一部の流体が貫通溝６を通過し（図５中矢印Ｙ２参照）、弁体２の下流側で合流することになる。   Further, in the present embodiment, the case where the internal space formed by the groove 44 of the housing body 41 and the holder 42 is a bypass has been described as an example, but like the constant flow valve 1A illustrated in FIGS. 4 and 5, It is also possible to form a plurality of through grooves 6 in a portion of the pedestal 43a that is exposed from the valve body 2 when viewed from above, and to use the through grooves 6 as a bypass. Since the through groove 6 merges with the flow path 3 on the downstream side of the valve body 2, most of the fluid passes between the windings of the valve body 2 when the fluid flows into the constant flow valve 1 </ b> A from the water supply pipe. However, a part of the fluid passes through the through groove 6 (see arrow Y2 in FIG. 5), and merges on the downstream side of the valve body 2 (see arrow Y1 in FIG. 5).

また、本実施形態では、バネ受け部２３が弁体２の小径端部２１の内部空間を閉塞している場合を例示して説明したが、図６に示す定流量弁１Ｂのように、バネ受け部２３ｂに弁体２の伸縮方向に沿う通過孔２９を形成してもよい。この場合、給水管路から定流量弁１Ｂに流体が流れ込むと、ほとんどの流体が弁体２の各巻線間を通過するものの（図６中矢印Ｙ３参照）、一部の流体が通過孔２９を通過し（図６中矢印Ｙ４参照）、弁体２の下流側で合流することになる。このように、通過孔２９がバイパスとして作用することになるので、溝のない筐体本体４１ｂを用いることが可能となる。なお、バネ受け部２３ｂを弁体２から取り外して小径端部２１の内部空間を開放し、その内部空間を通過孔とすることも可能である。   In the present embodiment, the case where the spring receiving portion 23 closes the internal space of the small diameter end portion 21 of the valve body 2 has been described as an example. However, as in the constant flow valve 1B shown in FIG. You may form the passage hole 29 along the expansion-contraction direction of the valve body 2 in the receiving part 23b. In this case, when fluid flows from the water supply pipe into the constant flow valve 1B, most of the fluid passes between the windings of the valve body 2 (see arrow Y3 in FIG. 6), but some fluid passes through the passage hole 29. It passes (see arrow Y4 in FIG. 6) and merges on the downstream side of the valve body 2. Thus, since the passage hole 29 acts as a bypass, it becomes possible to use the housing body 41b without a groove. It is also possible to remove the spring receiving portion 23b from the valve body 2 to open the internal space of the small diameter end portion 21, and to use the internal space as a passage hole.

また、図７に示す定流量弁１Ｃのように、流路３内で弁体２を支持して、弁体２の伸縮動作をガイドするガイド軸１０を備える場合には、当該ガイド軸１０にバイパスとなる貫通孔１１を形成することも可能である。この場合、ガイド軸１０はバネ受け部２３ｃの通過孔２９に係合されることで、ガイド軸１０に沿って弁体２が摺動して伸縮動作するようになっている。そして、給水管路から定流量弁１Ｃに流体が流れ込むと、ほとんどの流体が弁体２の各巻線間を通過するものの（図７中矢印Ｙ５参照）、一部の流体がガイド軸１０の貫通孔１１を通過し（図７中矢印Ｙ６参照）、弁体２の下流側で合流することになる。
なお、図７の定流量弁１Ｃでは、弁体２がガイド軸１０を摺動する場合を例示して説明したが、弁体２のバネ受け部２３ｃがガイド軸１０に固定されていて、ガイド軸１０自体が図示しないガイド軸受けに沿って摺動することで、弁体２が伸縮動作するようにしてもよい。 Further, when the guide shaft 10 that supports the valve body 2 in the flow path 3 and guides the expansion and contraction operation of the valve body 2 is provided like the constant flow valve 1C shown in FIG. It is also possible to form a through hole 11 serving as a bypass. In this case, the guide shaft 10 is engaged with the passage hole 29 of the spring receiving portion 23 c, so that the valve body 2 slides along the guide shaft 10 to expand and contract. When fluid flows into the constant flow valve 1C from the water supply pipe, most of the fluid passes between the windings of the valve body 2 (see arrow Y5 in FIG. 7), but some fluid penetrates the guide shaft 10. It passes through the hole 11 (see arrow Y6 in FIG. 7) and joins on the downstream side of the valve body 2.
In the constant flow valve 1C of FIG. 7, the case where the valve body 2 slides on the guide shaft 10 has been described as an example. However, the spring receiving portion 23c of the valve body 2 is fixed to the guide shaft 10, and the guide The valve body 2 may be expanded and contracted by the shaft 10 itself sliding along a guide bearing (not shown).

１ 定流量弁
２ 弁体（コイル状バネ）
３ 流路
４ 筐体
６ 貫通溝
１０ ガイド軸
１１ 貫通孔（バイパス）
２１ 小径端部
２２ 大径端部
２３ バネ受け部（閉塞部材）
２４ 緩衝部材
２５ 座板
２６ 羽
２７ 大径端部
２９ 通過孔（バイパス）
４１ 筐体本体
４２ ホルダー（固定部）
４３ 台座（固定部）
４４ 溝 1 Constant flow valve 2 Valve body (coiled spring)
3 Flow path 4 Housing 6 Through groove 10 Guide shaft 11 Through hole (bypass)
21 Small-diameter end portion 22 Large-diameter end portion 23 Spring receiving portion (blocking member)
24 cushioning member 25 seat plate 26 wing 27 large diameter end 29 passage hole (bypass)
41 Housing body 42 Holder (fixing part)
43 Base (fixed part)
44 groove

Claims (5)

弁体をなす円錐形状のコイル状バネと、
流体の流路を形成し、前記コイル状バネの小径端部側が前記流路の上流側を向くように当該コイル状バネを前記流路内に収容する筐体と、
前記コイル状バネの各巻線間を通過する流体とは別個に流体を流すバイパスとを備えることを特徴とする定流量弁。 A conical coil spring forming a valve body;
Forming a fluid flow path, and housing the coiled spring in the flow path so that the small diameter end portion side of the coiled spring faces the upstream side of the flow path;
A constant flow valve comprising: a bypass for flowing a fluid separately from a fluid passing between the windings of the coiled spring. 請求項１記載の定流量弁において、
前記筐体には、前記コイル状バネの大径端部における最外周部分の少なくとも一部を固定する固定部が設けられていることを特徴とする定流量弁。 The constant flow valve according to claim 1,
The constant flow valve according to claim 1, wherein the casing is provided with a fixing portion that fixes at least a part of the outermost peripheral portion of the large-diameter end portion of the coil spring. 請求項２記載の定流量弁において、
前記コイル状バネの小径端部には、当該小径端部を閉塞する閉塞部材が取り付けられており、
前記バイパスは、前記筐体の外壁内に形成されていることを特徴とする定流量弁。 The constant flow valve according to claim 2,
A closing member for closing the small diameter end is attached to the small diameter end of the coiled spring,
The constant flow valve according to claim 1, wherein the bypass is formed in an outer wall of the casing. 請求項２記載の定流量弁において、
前記コイル状バネの小径端部には、前記バイパスとなる通過孔が形成されていることを特徴とする定流量弁。 The constant flow valve according to claim 2,
A constant flow valve characterized in that a passage hole serving as the bypass is formed at a small-diameter end of the coil spring. 請求項１記載の定流量弁において、
前記流路内で前記コイル状バネを支持して、当該コイル状バネの伸縮動作をガイドするガイド軸を備え、
前記ガイド軸には、前記バイパスとなる貫通孔が形成されていることを特徴とする定流量弁。 The constant flow valve according to claim 1,
A guide shaft that supports the coiled spring in the flow path and guides the expansion and contraction of the coiled spring;
The guide shaft is formed with a through hole serving as the bypass.
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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5041117U (en) * 1973-08-10 1975-04-25
JPS5793669U (en) * 1980-11-28 1982-06-09
JPS58187691U (en) * 1982-06-09 1983-12-13 株式会社ノーリツ water conditioner
JPH04219575A (en) * 1990-12-18 1992-08-10 Nohmi Bosai Ltd Constant flow rate valve
JP3001309U (en) * 1994-02-22 1994-08-23 六反機械株式会社 Constant flow spout pipe
JPH06235470A (en) * 1993-01-14 1994-08-23 Fuji Seiko Kk Constant flow rate valve
JP2007032752A (en) * 2005-07-28 2007-02-08 Kagla Inbest Corp Constant flow valve

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5041117U (en) * 1973-08-10 1975-04-25
JPS5793669U (en) * 1980-11-28 1982-06-09
JPS58187691U (en) * 1982-06-09 1983-12-13 株式会社ノーリツ water conditioner
JPH04219575A (en) * 1990-12-18 1992-08-10 Nohmi Bosai Ltd Constant flow rate valve
JPH06235470A (en) * 1993-01-14 1994-08-23 Fuji Seiko Kk Constant flow rate valve
JP3001309U (en) * 1994-02-22 1994-08-23 六反機械株式会社 Constant flow spout pipe
JP2007032752A (en) * 2005-07-28 2007-02-08 Kagla Inbest Corp Constant flow valve

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