JP2016014405A - Control valve - Google Patents

Control valve Download PDF

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JP2016014405A
JP2016014405A JP2014135381A JP2014135381A JP2016014405A JP 2016014405 A JP2016014405 A JP 2016014405A JP 2014135381 A JP2014135381 A JP 2014135381A JP 2014135381 A JP2014135381 A JP 2014135381A JP 2016014405 A JP2016014405 A JP 2016014405A
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valve body
connection
stem
control valve
shaft
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JP6380975B2 (en
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浩司 平松
Koji Hiramatsu
浩司 平松
曽我尾　昌彦
Masahiko Sogao
昌彦 曽我尾
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Fujikin Inc
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Fujikin Inc
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Abstract

PROBLEM TO BE SOLVED: To provide a control valve capable of ensuring accurate flow control.SOLUTION: A control valve 1 comprises: a valve body 2 including a flow passage; a valve element 3 opening and closing the flow passage of the valve body 2 by vertical motion; and an actuator 4 driving the valve element 3 to vertically move, the valve element 3 being coupled to the actuator 4 by a plurality of coupling members, the control valve 1 including a coupling structure 10 in which a pair of the coupling members to be coupled together abut on each other by a pressure of a plate spring, an abutment surface of one of the coupling members out of the paired coupling members is spherical, and an abutment surface of the other coupling member is flat or spherical.

Description

本発明は、流量を調整する制御弁に関し、詳しくはステムが長くても正確な流量制御が行える制御弁に関する。   The present invention relates to a control valve for adjusting a flow rate, and more particularly to a control valve capable of accurate flow rate control even when a stem is long.

アクチュエータの動作により流量を調整する制御弁は、一般的に、バルブボディの流路を上下動により開閉するステムと、アクチュエータに設けられたシャフトとが一体的に連結した構造となっている。
このようなステムとシャフトの連結においては、一般的に雄ネジ部と雌ネジ部を用いたねじ込みにより固定される構造や、一方に設けられた突起部と他方に設けられた嵌合凹部とが接着剤によって接合される構造（例えば特許文献１参照）となっている。 A control valve that adjusts the flow rate by the operation of an actuator generally has a structure in which a stem that opens and closes a flow path of a valve body by a vertical movement and a shaft provided in the actuator are integrally connected.
In such a connection between the stem and the shaft, there is generally a structure that is fixed by screwing using a male screw part and a female screw part, and a projection part provided on one side and a fitting concave part provided on the other side. It has a structure joined by an adhesive (see, for example, Patent Document 1).

このような制御弁は、ステムが挿通されるボンネット部のグランドパッキンによるシール機構や、制御弁の開度を表示するためのインジケータ部を設けることが望まれるため、必然的にステムが長くなり、シャフトの軸心とステムの軸心が一直線になり難く、組立が困難になったり、芯ずれによりシール部に悪影響を及ぼす恐れがあり、正確な流量制御が行えないおそれがある。   Such a control valve is desirably provided with a seal mechanism by a gland packing of the bonnet part through which the stem is inserted, and an indicator part for displaying the opening degree of the control valve. The shaft axis and the stem axis are unlikely to be in a straight line, making it difficult to assemble, or causing the seal portion to be adversely affected due to misalignment, and accurate flow control may not be possible.

また、開閉弁においては、シャフトの軸心とステムの軸心を一直線にするために吊構造をとることが一般的であるが、制御弁においては吊部のガタツキにより吊構造を採用することは一般的ではない。 In addition, in an on-off valve, it is common to adopt a suspension structure in order to align the axis of the shaft and the axis of the stem, but in a control valve, it is not possible to adopt a suspension structure due to rattling of the suspension. Not common.

実公平１−４０３８１号公報Japanese Utility Model Publication No. 1-40401

本発明は、上記したような従来技術の問題点を解決すべくなされたものであって、正確な流量制御を行うことができる制御弁を提供するものである。   The present invention has been made to solve the above-described problems of the prior art, and provides a control valve capable of performing accurate flow rate control.

請求項１に係る発明は、流路を有するバルブボディと、該バルブボディの流路を上下動により開閉する弁体と、該弁体を上下動させるアクチュエータとを備えた制御弁であって、前記弁体と前記アクチュエータとの間の連結を複数の連結物によって行い、連結される少なくとも一組の連結物が皿バネの圧力によって当接され、前記一組の連結物の内の一方の連結物の当接面は球面であり、他方の連結物の当接面は平面又は球面である連結構造を有することを特徴とする制御弁に関する。   The invention according to claim 1 is a control valve comprising a valve body having a flow path, a valve body that opens and closes the flow path of the valve body by vertical movement, and an actuator that moves the valve body up and down, The connection between the valve body and the actuator is performed by a plurality of connected objects, and at least one set of connected objects is contacted by the pressure of a disc spring, and one of the connected objects of the set of connected objects The contact surface of the object is a spherical surface, and the contact surface of the other connected object is a flat or spherical connection structure.

請求項２に係る発明は、前記アクチュエータに設けられた上下動するシャフトと、前記シャフトと弁体とを接続するステムとを備え、前記シャフトと前記ステムとの連結が前記連結構造であることを特徴とする請求項１記載の制御弁に関する。   The invention according to claim 2 includes a shaft provided in the actuator that moves up and down, and a stem that connects the shaft and the valve body, and the connection between the shaft and the stem is the connection structure. The control valve according to claim 1, wherein

請求項３に係る発明は、前記アクチュエータに設けられた上下動するシャフトと、前記シャフトと弁体とを接続するステムとを備え、前記ステムと前記弁体との連結が前記連結構造であることを特徴とする請求項１記載の制御弁に関する。   The invention according to claim 3 includes a shaft provided in the actuator that moves up and down, and a stem that connects the shaft and the valve body, and the connection between the stem and the valve body is the connection structure. The control valve according to claim 1.

請求項１に係る発明の制御弁によれば、一組の連結物の内の一方の連結物の当接面が球面であり、他方の連結物の当接面が平面又は球面である。このことにより、一方の連結物の軸心と他方の連結物の軸心とがたとえ一直線になっていなくても、一方の連結物の上下動が他方の連結物に正確に伝達され易くなる。
また、一組の連結物間に皿バネによる圧縮応力が働いており、皿バネの撓み量が一組の連結物間のガタツキ量になるが、皿バネは撓み量が小さいのでガタツキ量を小さくすることができる。
これらのことにより、正確な流量制御が期待される。 According to the control valve of the first aspect of the present invention, the contact surface of one connected object in the set of connected objects is a spherical surface, and the contact surface of the other connected object is a flat surface or a spherical surface. Thus, even if the axis of one connected object and the axis of the other connected object are not in a straight line, the vertical movement of one connected object is easily transmitted to the other connected object accurately.
In addition, the compressive stress due to the disc spring is acting between a set of connected objects, and the amount of deflection of the disc spring becomes the amount of backlash between a set of connected materials, but the amount of backlash is small, so the amount of backlash is small. can do.
As a result, accurate flow rate control is expected.

請求項２に係る発明の制御弁によれば、前記シャフトと前記ステムとの連結が前記連結構造であるので、前記シャフトの上下動が前記ステムに正確に伝達され易くなる。また、前記シャフトと前記ステム間のガタツキ量を小さくすることができる。これらのことにより、正確な流量制御が期待される。   According to the control valve of the invention according to claim 2, since the connection between the shaft and the stem is the connection structure, the vertical movement of the shaft is easily transmitted to the stem accurately. Further, the amount of backlash between the shaft and the stem can be reduced. As a result, accurate flow rate control is expected.

請求項３に係る発明の制御弁によれば、前記ステムと前記弁体との連結が前記連結構造であるので、前記ステムの上下動が前記弁体に正確に伝達され易くなる。また、前記ステムと前記弁体間のガタツキ量を小さくすることができる。これらのことにより、正確な流量制御が期待される。   According to the control valve of the third aspect of the invention, since the connection between the stem and the valve body is the connection structure, the vertical movement of the stem is easily transmitted accurately to the valve body. Further, the amount of backlash between the stem and the valve body can be reduced. As a result, accurate flow rate control is expected.

本発明に係る制御弁の概略図である。It is the schematic of the control valve which concerns on this invention. 本発明に係る制御弁に用いる連結構造の概略図である。It is the schematic of the connection structure used for the control valve which concerns on this invention.

以下、本発明に係る制御弁の好適な実施形態について、図面を参照しながら説明する。図１に制御弁の構成を示す。
制御弁１は、流路を有するバルブボディ２と、該バルブボディ２の流路を上下動により開閉する弁体３と、該弁体３を上下動させるアクチュエータ４とを備えている。アクチュエータ４には、アクチュエータ４の動作により上下動するシャフト４１が設けられている。シャフト４１と弁体３とはステム５によって連結されている。
制御弁１は、弁体３とアクチュエータ４との間の連結において、後述する連結構造を有している。つまり、シャフト４１とステム５との連結、ステム５と弁体３との連結に、次に説明する連結構造を用いている。 Hereinafter, preferred embodiments of a control valve according to the present invention will be described with reference to the drawings. FIG. 1 shows the configuration of the control valve.
The control valve 1 includes a valve body 2 having a flow path, a valve body 3 that opens and closes the flow path of the valve body 2 by vertical movement, and an actuator 4 that moves the valve body 3 up and down. The actuator 4 is provided with a shaft 41 that moves up and down by the operation of the actuator 4. The shaft 41 and the valve body 3 are connected by a stem 5.
The control valve 1 has a connection structure described later in connection between the valve body 3 and the actuator 4. That is, the connection structure described below is used for the connection between the shaft 41 and the stem 5 and the connection between the stem 5 and the valve body 3.

前述した連結構造について、図２を参照して説明する。
連結構造１０の説明においては、連結される一方の連結物を第一連結物６１とし、他方の連結物を第二連結物６２とする。
第一連結物６１は、先端にボルト６１１が螺合されるネジ穴６１２が設けられた軸体６１３を有している。
軸体６１３の下端面とボルト６１１の頭部との間にリング状の中継部６１４が介装され、中継部６１４はボルト６１１によって軸体６１３に固定される。
中継部６１４の外径は軸体６１３の外径よりも大きい。また、中継部６１４の周辺部６１４ａの下端面は、ネジ穴６１２に螺合されるボルト６１１の下端よりも下側に突出しており、その突出した周辺部６１４ａに囲まれた凹部に当接部６１５が嵌合される。第一連結物６１は、当接部６１５によって第二連結物６２と当接する。第二連結物６２と当接する当接部６１５の当接面は、球面になっている。 The connecting structure described above will be described with reference to FIG.
In the description of the connection structure 10, one connected object to be connected is referred to as a first connected object 61, and the other connected object is referred to as a second connected object 62.
The 1st connection thing 61 has the axial body 613 in which the screw hole 612 by which the volt | bolt 611 is screwed together was provided in the front-end | tip.
A ring-shaped relay portion 614 is interposed between the lower end surface of the shaft body 613 and the head of the bolt 611, and the relay portion 614 is fixed to the shaft body 613 by the bolt 611.
The outer diameter of the relay part 614 is larger than the outer diameter of the shaft body 613. Further, the lower end surface of the peripheral portion 614a of the relay portion 614 protrudes below the lower end of the bolt 611 that is screwed into the screw hole 612, and comes into contact with the concave portion surrounded by the protruding peripheral portion 614a. 615 is fitted. The first connection object 61 contacts the second connection object 62 by the contact portion 615. The contact surface of the contact portion 615 that contacts the second connector 62 is a spherical surface.

第二連結物６２は、上部が筒状になった棒体であり、この筒状部分６２１が中継部６１４と軸体６１３とを包囲する。第二連結物６２は、筒状部分６２１の底面、換言すれば第二連結物６２の径中央の上端面において第一連結物６１と当接する。この第二連結物６２の当接面は平面になっているが、球面でもよい。   The second connected object 62 is a rod body having an upper part formed in a cylindrical shape, and the cylindrical part 621 surrounds the relay part 614 and the shaft body 613. The second connected object 62 comes into contact with the first connected object 61 on the bottom surface of the cylindrical portion 621, in other words, the upper end surface at the center of the diameter of the second connected object 62. The contact surface of the second connection 62 is a flat surface, but may be a spherical surface.

第二連結物６２の筒状部分６２１の上部の内周面には雌ネジが形成されている。
第一連結物６１と第二連結物６２とは、第一連結物６１の軸体６１３の外周面と第二連結物６２の筒状部分６２１との間に介装されるリング状の締付部６３によって連結される。
締付部６３は、下端面が径方向に二段になっており、内側の面が外側の面よりも下側に突出している。締付部６３の下側に突出した部分の外周面に雄ネジが形成されており、締付部６３は第二連結物６２の筒状部分６２１の内側に螺合され、締付部６３の下端面の外側の面は第二連結物６２の筒状部分６２１の上端面と対向し、締付部６３の下端面の内側の面は中継部６１４の上端面と対向する。
締付部６３の下端面の内側の面と中継部６１４の上端面との間に皿バネ７が介装される。
皿バネ７は、第一連結物６１の当接部６１５を第二連結物６２に付勢する。つまり、皿バネ７は、第一連結物６１と第二連結物６２とに圧縮応力を働かせる。締付部６３を第二連結物６２の筒状部分６２１に螺合することによって、第一連結物６１と第二連結物６２は連結される。 A female thread is formed on the inner peripheral surface of the upper portion of the cylindrical portion 621 of the second connector 62.
The first connection object 61 and the second connection object 62 are ring-shaped tightenings interposed between the outer peripheral surface of the shaft body 613 of the first connection object 61 and the cylindrical portion 621 of the second connection object 62. The parts 63 are connected.
The lower end surface of the tightening portion 63 has two steps in the radial direction, and the inner surface protrudes below the outer surface. A male screw is formed on the outer peripheral surface of the portion projecting downward from the tightening portion 63, and the tightening portion 63 is screwed into the inside of the cylindrical portion 621 of the second connector 62. The outer surface of the lower end surface is opposed to the upper end surface of the cylindrical portion 621 of the second connector 62, and the inner surface of the lower end surface of the fastening portion 63 is opposed to the upper end surface of the relay portion 614.
The disc spring 7 is interposed between the inner surface of the lower end surface of the tightening portion 63 and the upper end surface of the relay portion 614.
The disc spring 7 biases the contact portion 615 of the first connection object 61 against the second connection object 62. That is, the disc spring 7 exerts a compressive stress on the first connection object 61 and the second connection object 62. By screwing the tightening portion 63 into the cylindrical portion 621 of the second connection object 62, the first connection object 61 and the second connection object 62 are connected.

第一連結物６１と第二連結物６２の当接する面がどちらも平面である場合、第一連結物６１の軸心と第二連結物６２の軸心とが一直線でないと、一方から他方への応力が面全体に均一にかからずに接触面の端部に集中してしまう。このために、一方の連結物の上下動が他方の連結物に正確に伝達され難くなる。しかし、本実施形態のように当接部６１５の当接面が球面であると、第一連結物６１と第二連結物６２とは、それぞれの中心部分で当接する。そのため、たとえ第一連結物６１の軸心と第二連結物６２の軸心とが一直線でなくても、一方の連結物の上下動が他方の連結物に正確に伝達され易くなる。   When both the contact surfaces of the first connection object 61 and the second connection object 62 are flat surfaces, the axis of the first connection object 61 and the axis of the second connection object 62 are not in a straight line. Stress is not uniformly applied to the entire surface, but is concentrated on the edge of the contact surface. For this reason, it becomes difficult for the vertical movement of one connection thing to be correctly transmitted to the other connection thing. However, when the contact surface of the contact part 615 is a spherical surface as in the present embodiment, the first connection object 61 and the second connection object 62 contact each other at their center portions. For this reason, even if the axis of the first connection object 61 and the axis of the second connection object 62 are not in a straight line, the vertical movement of one connection object is easily transmitted accurately to the other connection object.

また、皿バネ７の撓み量が第一連結物６１と第二連結物６２との間のガタツキ量、つまり第一連結物６１と第二連結物６２との間の距離の変動量となるが、皿バネ７は撓み量が小さいので、第一連結物６１と第二連結物６２との間のガタツキは小さくなる。また、弾性係数の大きい皿バネ７を用いることにより、ガタツキを更に小さくすることができる。
このように、第一連結物６１の当接部６１５の当接面が球面であることと、皿バネ７を用いることにより一方の連結物の上下動が他方の連結物に正確に伝達され易くなるので、正確な流量制御が期待される。
なお、軸体６１３、中継部６１４、当接部６１５、第二連結物６２及び締付部６３の材質は特に限定されないが、金属やセラミック等を用いることができる。 In addition, the amount of deflection of the disc spring 7 is the amount of backlash between the first connected object 61 and the second connected object 62, that is, the amount of variation in the distance between the first connected object 61 and the second connected object 62. Since the disc spring 7 has a small amount of bending, the backlash between the first connected object 61 and the second connected object 62 becomes small. Further, the backlash can be further reduced by using the disc spring 7 having a large elastic coefficient.
As described above, the contact surface of the contact portion 615 of the first connection object 61 is a spherical surface, and the use of the disc spring 7 makes it easy to accurately transmit the vertical movement of one connection object to the other connection object. Therefore, accurate flow control is expected.
In addition, although the material of the shaft body 613, the relay part 614, the contact part 615, the 2nd connection thing 62, and the clamp | tightening part 63 is not specifically limited, A metal, a ceramic, etc. can be used.

続いて、制御弁１の構成の追加説明を、図１を参照して行う。
制御弁１は、バルブボディ２の上部に接続されるボンネット８と、ボンネット８とアクチュエータ４とを接続するヨーク９とを備えている。
バルブボディ２は、上方に弁体３を挿通させる円筒部２１を有しており、この円筒部２１の外周には雄ネジが形成されている。
ボンネット８は下部の周囲に鍔部８ａを有しており、鍔部８ａの下面がバルブボディ２の円筒部２１の上面に接続される。ボンネット８のバルブボディ２への接続はリング状のボンネットナット８１によって行われる。
ボンネットナット８１は、内周面に雌ネジが形成されており、ボンネット８の鍔部８ａを挟んでボンネットナット８１をバルブボディ２の円筒部２１に螺合することによりボンネット８をバルブボディ２に接続する。このボンネット８内に弁体３とステム５が挿通される。 Subsequently, an additional description of the configuration of the control valve 1 will be given with reference to FIG.
The control valve 1 includes a bonnet 8 connected to the upper portion of the valve body 2, and a yoke 9 that connects the bonnet 8 and the actuator 4.
The valve body 2 has a cylindrical portion 21 through which the valve body 3 is inserted, and a male screw is formed on the outer periphery of the cylindrical portion 21.
The bonnet 8 has a flange portion 8 a around the lower portion, and the lower surface of the flange portion 8 a is connected to the upper surface of the cylindrical portion 21 of the valve body 2. The bonnet 8 is connected to the valve body 2 by a ring-shaped bonnet nut 81.
The bonnet nut 81 has a female screw formed on the inner peripheral surface thereof, and the bonnet 8 is attached to the valve body 2 by screwing the bonnet nut 81 into the cylindrical portion 21 of the valve body 2 with the flange portion 8a of the bonnet 8 interposed therebetween. Connecting. The valve body 3 and the stem 5 are inserted into the bonnet 8.

ボンネット８の内部にはＯリングホルダー８２に保持された状態でＯリング８３が設けられており、このＯリング８３によってボンネット８の内面とステム５の外面との隙間からの流体の漏洩を防ぐようになっている。
Ｏリングホルダー８２の下部にはグランドパッキン８４が介装されている。グランドパッキン８４は、例えばＰＦＡ、ＰＴＦＥ等の硬質合成樹脂から形成されており、Ｏリング８３と共にボンネット８の内面とステム５の外面との隙間からの流体の漏洩を防ぐ。
グランドパッキン８４の下部には、仕切りとなるハメワ８５を介してコイルバネ８６が介装されている。このコイルバネ８６はＯリングホルダー８２及びグランドパッキン８４を上向きに付勢する。 An O-ring 83 is provided inside the bonnet 8 while being held by an O-ring holder 82, and this O-ring 83 prevents fluid leakage from the gap between the inner surface of the bonnet 8 and the outer surface of the stem 5. It has become.
A gland packing 84 is interposed under the O-ring holder 82. The gland packing 84 is made of, for example, a hard synthetic resin such as PFA or PTFE, and prevents leakage of fluid from the gap between the inner surface of the bonnet 8 and the outer surface of the stem 5 together with the O-ring 83.
A coil spring 86 is interposed under the gland packing 84 via a hammer 85 serving as a partition. The coil spring 86 urges the O-ring holder 82 and the gland packing 84 upward.

ボンネット８の上部内面には、Ｏリングホルダー８２の上面に当接するようにパッキン押さえネジ８７が回転操作可能に螺着されており、グランドパッキン８４はパッキン押さえネジ８７の締め付けにより所定量以上の圧縮力が加わったときに拡径するようになっている。
これにより、Ｏリング８３が経時的に劣化してステム５とボンネット８の隙間から流体が漏洩した場合、パッキン押さえネジ８７を締め付けてグランドパッキン８４を拡径させることで、ステム５とボンネット８との間の隙間を密封することができる。 A packing holding screw 87 is rotatably attached to the upper inner surface of the bonnet 8 so as to contact the upper surface of the O-ring holder 82, and the gland packing 84 is compressed by a predetermined amount or more by tightening the packing holding screw 87. The diameter is expanded when force is applied.
As a result, when the O-ring 83 deteriorates with time and fluid leaks from the gap between the stem 5 and the bonnet 8, the gland packing 84 is expanded by tightening the packing holding screw 87. The gap between the two can be sealed.

ヨーク９は、上下２枚の円板９１、９２と、これら２枚の円板９１、９２を左右の縁部においてそれぞれ連結する右連結部９３及び左連結部９４から構成されて、正面視においては図１に示す如く四角形の枠状を呈しており、これによって前方或いは後方からパッキン押さえネジ８７の締め付け操作を容易に行うことが可能となっている。
上部の円板９１はアクチュエータ４の下端面とネジ（図示せず）によって連結され、下部の円板９２はその中心に形成されたネジ穴に筒部８の上部外面に形成された雄ネジ部が螺着されており、これによってボンネット８とアクチュエータ４がヨーク９によって連結されている。 The yoke 9 is composed of two upper and lower disks 91 and 92, and a right connecting part 93 and a left connecting part 94 that connect the two disks 91 and 92 at the left and right edges, respectively. 1 has a quadrangular frame shape as shown in FIG. 1, whereby the packing holding screw 87 can be easily tightened from the front or rear.
The upper disc 91 is connected to the lower end surface of the actuator 4 by a screw (not shown), and the lower disc 92 is a male screw portion formed on the upper outer surface of the cylindrical portion 8 in a screw hole formed at the center thereof. The bonnet 8 and the actuator 4 are connected by a yoke 9.

ステム５にはインジケータ（図示せず）が設けられており、制御弁の開度を確認することができる。   The stem 5 is provided with an indicator (not shown), and the opening degree of the control valve can be confirmed.

シャフト４１とステム５との連結、及びステム５と弁体３との連結には上述した連結構造１０が用いられている。
このように、各連結箇所に上述した連結構造１０を用いているので、ステム５等を長くしてもアクチュエータ４によるシャフト４１の上下動が弁体３に正確に伝達され、正確な流量制御を行うことができる。 The connection structure 10 described above is used for the connection between the shaft 41 and the stem 5 and the connection between the stem 5 and the valve body 3.
Thus, since the connection structure 10 described above is used at each connection point, the vertical movement of the shaft 41 by the actuator 4 is accurately transmitted to the valve body 3 even if the stem 5 or the like is lengthened, and accurate flow control is performed. It can be carried out.

なお、本実施形態では、シャフト４１とステム５との連結、及びステム５と弁体３との連結の全ての連結に上述した連結構造１０を用いたが、全ての連結箇所に用いずに少なくとも１箇所の連結に用いてもよい。   In the present embodiment, the connection structure 10 described above is used for all the connections between the shaft 41 and the stem 5 and the connection between the stem 5 and the valve body 3, but at least the connection structure 10 is not used. You may use for the connection of one place.

本発明は、ステムが長い制御弁に好適に使用されるがこれに限るものではない。   The present invention is preferably used for a control valve having a long stem, but is not limited thereto.

１ 制御弁
２ バルブボディ
３ 弁体
４ アクチュエータ
４１ シャフト
５ ステム
６１ 第一連結物（連結物）
６２ 第二連結物（連結物）
７ 皿バネ
９ ヨーク
１０ 連続構造 DESCRIPTION OF SYMBOLS 1 Control valve 2 Valve body 3 Valve body 4 Actuator 41 Shaft 5 Stem 61 First connection thing (connection thing)
62 Second connected product (connected product)
7 Disc spring 9 Yoke 10 Continuous structure

Claims (3)

流路を有するバルブボディと、
該バルブボディの流路を上下動により開閉する弁体と、
該弁体を上下動させるアクチュエータとを備えた制御弁であって、
前記弁体と前記アクチュエータとの間の連結を複数の連結物によって行い、
連結される少なくとも一組の連結物が皿バネの圧力によって当接され、前記一組の連結物の内の一方の連結物の当接面は球面であり、他方の連結物の当接面は平面又は球面である連結構造を有することを特徴とする制御弁。 A valve body having a flow path;
A valve body that opens and closes the flow path of the valve body by vertical movement;
A control valve comprising an actuator for moving the valve body up and down,
The connection between the valve body and the actuator is performed by a plurality of connected objects,
At least one set of connected objects is contacted by the pressure of the disc spring, the contact surface of one of the connected objects is a spherical surface, and the contact surface of the other connected object is A control valve having a connecting structure which is a flat surface or a spherical surface. 前記アクチュエータに設けられた上下動するシャフトと、前記シャフトと弁体とを接続するステムとを備え、
前記シャフトと前記ステムとの連結が前記連結構造であることを特徴とする請求項１記載の制御弁。 A shaft that moves up and down provided in the actuator, and a stem that connects the shaft and the valve body;
The control valve according to claim 1, wherein the connection between the shaft and the stem is the connection structure. 前記アクチュエータに設けられた上下動するシャフトと、前記シャフトと弁体とを接続するステムとを備え、
前記ステムと前記弁体との連結が前記連結構造であることを特徴とする請求項１記載の制御弁。 A shaft that moves up and down provided in the actuator, and a stem that connects the shaft and the valve body;
The control valve according to claim 1, wherein the connection between the stem and the valve body is the connection structure.
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20220158834A (en) 2020-04-28 2022-12-01 가부시키가이샤 후지킨 valve
JP7300160B2 (en) 2019-06-28 2023-06-29 株式会社フジキン valve

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Publication number Priority date Publication date Assignee Title
US3241805A (en) * 1962-10-23 1966-03-22 Powers Regulator Co Valve
JPS52107623A (en) * 1976-03-04 1977-09-09 Rockwell International Corp Connector
JPS5357372A (en) * 1976-11-03 1978-05-24 Rockwell International Corp Method of assembling joint and joint
JPS5556963U (en) * 1978-10-13 1980-04-17
JPS5610554U (en) * 1979-07-06 1981-01-29
JPH094728A (en) * 1995-06-20 1997-01-07 Kubota Corp Valve

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3241805A (en) * 1962-10-23 1966-03-22 Powers Regulator Co Valve
JPS52107623A (en) * 1976-03-04 1977-09-09 Rockwell International Corp Connector
JPS5357372A (en) * 1976-11-03 1978-05-24 Rockwell International Corp Method of assembling joint and joint
JPS5556963U (en) * 1978-10-13 1980-04-17
JPS5610554U (en) * 1979-07-06 1981-01-29
JPH094728A (en) * 1995-06-20 1997-01-07 Kubota Corp Valve

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7300160B2 (en) 2019-06-28 2023-06-29 株式会社フジキン valve
KR20220158834A (en) 2020-04-28 2022-12-01 가부시키가이샤 후지킨 valve
DE112021002515T5 (en) 2020-04-28 2023-04-13 Fujikin Incorporated VALVE
JP7382679B2 (en) 2020-04-28 2023-11-17 株式会社フジキン valve
KR102652145B1 (en) 2020-04-28 2024-03-27 가부시키가이샤 후지킨 valve

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