JP2002130499A - Three-way ball valve - Google Patents

Three-way ball valve

Info

Publication number
JP2002130499A
JP2002130499A JP2000320177A JP2000320177A JP2002130499A JP 2002130499 A JP2002130499 A JP 2002130499A JP 2000320177 A JP2000320177 A JP 2000320177A JP 2000320177 A JP2000320177 A JP 2000320177A JP 2002130499 A JP2002130499 A JP 2002130499A
Authority
JP
Japan
Prior art keywords
valve
opening
shaft
hole
valve shaft
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.)
Granted
Application number
JP2000320177A
Other languages
Japanese (ja)
Other versions
JP4106173B2 (en
Inventor
Noriichi Wada
矩一 和田
Norio Nomaguchi
謙雄 野間口
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Azbil Corp
Original Assignee
Azbil Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Azbil Corp filed Critical Azbil Corp
Priority to JP2000320177A priority Critical patent/JP4106173B2/en
Publication of JP2002130499A publication Critical patent/JP2002130499A/en
Application granted granted Critical
Publication of JP4106173B2 publication Critical patent/JP4106173B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • Details Of Valves (AREA)
  • Multiple-Way Valves (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a three-way ball valve capable of suppressing the decrease of the total flow rate at the time of medium degree of opening. SOLUTION: The valve stem 1 of this three-way ball valve has a fit-in part 8, and at its front, an overhang part 14 is formed by extending the fit-in part 8 in the axial direction while its section shape is left unchanged, wherein the overhang part 14 is allowed to overhang from a through hole 9 in a valve ball 7 onto a flow passage in the valve ball so as to reduce mutual collision of fluids flowing in from the first opening 5 and second opening 6 and turbulence of the flow resulting from such a collision.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】本発明は三方ボール弁に関す
る。この三方ボール弁は、例えばビル空調設備における
湯水混合または分流等に使われるものである。この三方
ボール弁は流路切換弁等のいわゆるオンオフ弁とは異な
り、中間開度時の流量がその品質に大きく関わるもので
ある。The present invention relates to a three-way ball valve. The three-way ball valve is used, for example, for mixing or splitting hot and cold water in a building air conditioner. This three-way ball valve is different from a so-called on / off valve such as a flow path switching valve, and the flow rate at an intermediate opening greatly affects the quality.

【０００２】[0002]

【従来の技術】図５は従来の三方ボール弁の縦断面図で
ある。１は弁軸であり、図示せぬ電動アクチュエータ又
はハンドル等により回動操作される。２は弁本体であ
り、弁軸１を回動可能に挿入される軸開口３、弁軸の延
長線上に位置する共通開口４、弁軸１の軸線を挟んで両
側に位置する第一開口５及び第二開口６が形成されてい
る。７は弁ボールであり、弁軸１の先端部に形成された
嵌合部８が挿入される貫通孔９（嵌合孔）、弁軸８の延
長線上に位置する共通弁孔１０、弁軸８の軸線を挟んで
互いに直角に位置する第一弁孔１１及び第二弁孔１２と
が形成され、弁本体２内に収納される。共通弁孔１０、
第一弁孔１１、第二弁孔１２は弁ボール７内で互いにＬ
字型流路を形成している。2. Description of the Related Art FIG. 5 is a longitudinal sectional view of a conventional three-way ball valve. Reference numeral 1 denotes a valve shaft, which is rotated by an electric actuator or a handle (not shown). Reference numeral 2 denotes a valve body, which includes a shaft opening 3 into which the valve shaft 1 is rotatably inserted, a common opening 4 located on an extension of the valve shaft, and first openings 5 located on both sides of the axis of the valve shaft 1. And a second opening 6. Reference numeral 7 denotes a valve ball, a through hole 9 (fitting hole) into which a fitting portion 8 formed at the tip of the valve shaft 1 is inserted, a common valve hole 10 located on an extension of the valve shaft 8, and a valve shaft. A first valve hole 11 and a second valve hole 12 located at right angles to each other with respect to the axis 8 are formed and housed in the valve body 2. Common valve hole 10,
The first valve hole 11 and the second valve hole 12 are L
A U-shaped channel is formed.

【０００３】弁軸１の嵌合部８は、その先端部が貫通孔
９から弁ボール７内の流路に張り出さないよう先端面が
流路内面と略面一になるようになっている。The fitting portion 8 of the valve shaft 1 has a front end surface substantially flush with the inner surface of the flow passage so that the front end does not protrude from the through hole 9 into the flow passage in the valve ball 7. .

【０００４】弁軸１の周側面には環状溝２１ａ、２１ｂ
が形成され、軸開口３とのシールをとるためにそれぞれ
Ｏリング２２ａ、２２ｂがはめ込まれている。弁本体２
は弁ケース２４及び弁ボール挿入孔２５にねじ込まれた
取り外し部２６とから構成され、この取り外し部２６を
取り外した状態で弁ボール７を挿入し、これをねじ込む
ことで弁ボール７を固定する。弁ケース２４及び取り外
し部２６にはそれぞれ第一環状溝２７ａ、第二環状溝２
７ｂが形成され、それぞれシートリング２８ａ、２８ｂ
がはめ込まれている。このシートリング２８ａ、２８ｂ
により弁ボール７が支持されるとともに流体の漏れを防
いでいる。On the peripheral side surface of the valve shaft 1, annular grooves 21a and 21b are provided.
Are formed, and O-rings 22a and 22b are fitted to seal with the shaft opening 3, respectively. Valve body 2
Is composed of a valve case 24 and a removal portion 26 screwed into the valve ball insertion hole 25. The valve ball 7 is inserted with the removal portion 26 removed, and the valve ball 7 is fixed by screwing it. The first annular groove 27a and the second annular groove 2 are provided in the valve case 24 and the detaching portion 26, respectively.
7b are formed, and the seat rings 28a and 28b are respectively formed.
Is inlaid. The seat rings 28a, 28b
Supports the valve ball 7 and prevents fluid leakage.

【０００５】図６は図５の弁ボール７のＡ−Ａ断面図で
ある。嵌合部８は弁軸１に平面カット部１３ａ、１３ｂ
を設けることにより形成され、略同一形状の貫通孔９と
ある程度の隙間を有して嵌合されている。この隙間は、
シートリング等が摩耗してシートリングと弁ボール７と
の間に隙間を生じるようになっても、流体圧力により弁
ボール７がシートリングに押しつけられて流体の漏れを
防ぐようにするために設けられているものである。FIG. 6 is a sectional view of the valve ball 7 taken along line AA of FIG. The fitting portion 8 has flat cut portions 13a, 13b on the valve shaft 1.
And is fitted with a through hole 9 of substantially the same shape with a certain gap. This gap is
Even if the seat ring or the like is worn to cause a gap between the seat ring and the valve ball 7, the valve ball 7 is pressed against the seat ring by the fluid pressure to prevent leakage of the fluid. It is what is being done.

【０００６】図７（ａ）、図７（ｂ）、図７（ｃ）は図
５のＢ−Ｂ断面図であり、それぞれ第一弁孔１１の弁開
度１００％、５０％、０％の状態を表しており、図中矢
印は混合時の流体の流れを表している。FIGS. 7 (a), 7 (b), and 7 (c) are cross-sectional views taken along the line BB of FIG. 5, where the opening degree of the first valve hole 11 is 100%, 50%, and 0%, respectively. The arrows in the figure indicate the flow of the fluid during mixing.

【０００７】図８は従来の三方ボール弁の流量線図であ
る。図８において横軸は第一弁孔１１の弁開度（０％〜
１００％）を表し、縦軸は絶対流量を表す。図中実線で
表されるものものは、混合時、即ち流体が第一開口５及
び第二開口６から流入し共通開口４から流出するときの
流量を示し、実線３０ａは第一開口５の流量、実線３０
ｂは第一開口６の流量、実線３０ｃは共通開口４の流量
（＝総流量）を示す。図中点線で表されるものは、分流
時、即ち流体が共通開口４から流入し第一開口５及び第
二開口６から流出するときの流量を示し、点線３１ａは
第一開口５の流量、点線３１ｂは第一開口６の流量、点
線３１ｃは共通開口４の流量（＝総流量）を示す。な
お、これらの実線及び点線は二重になっているが、これ
は弁開度０％から弁開度１００％にしたときの実測値
と、弁開度１００％から０％にしたときの実測値の両方
を記載したことによるが、特に気にする必要はない。FIG. 8 is a flow chart of a conventional three-way ball valve. In FIG. 8, the horizontal axis represents the valve opening of the first valve hole 11 (0% to
100%), and the vertical axis represents the absolute flow rate. The solid line in the figure indicates the flow rate at the time of mixing, that is, when the fluid flows in from the first opening 5 and the second opening 6 and flows out of the common opening 4, and the solid line 30a indicates the flow rate of the first opening 5. , Solid line 30
b indicates the flow rate of the first opening 6, and the solid line 30c indicates the flow rate (= total flow rate) of the common opening 4. The dotted line in the figure indicates the flow rate at the time of split flow, that is, the flow rate when the fluid flows in from the common opening 4 and flows out from the first opening 5 and the second opening 6, and the dotted line 31a indicates the flow rate in the first opening 5, The dotted line 31b indicates the flow rate of the first opening 6, and the dotted line 31c indicates the flow rate (= total flow rate) of the common opening 4. Note that the solid line and the dotted line are doubled. These are the actual measured values when the valve opening is changed from 0% to 100% and the actual measured values when the valve opening is changed from 100% to 0%. Although both values are listed, there is no need to worry.

【０００８】[0008]

【発明が解決しようとする課題】図８において混合時の
総流量を示す実線３０ｃ、分流時の総流量を示す点線３
１ｃが共にＵ字型曲線となっていることから分かるよう
に、混合時及び分流時ともに中間開度時において総流量
が減少してしまうという問題点があった。また、混合時
は流入する流体どうしの衝突及び衝突による流れの乱れ
により分流時より更に総流量が減少してしまうという問
題点があった。In FIG. 8, a solid line 30c indicating the total flow rate at the time of mixing and a dotted line 3 indicating the total flow rate at the time of splitting.
As can be seen from the fact that both 1c are U-shaped curves, there has been a problem that the total flow rate decreases at the time of the intermediate opening both during mixing and during branching. Further, at the time of mixing, there is a problem that the total flow rate is further reduced than at the time of split flow due to collision of the flowing fluids and disturbance of the flow due to the collision.

【０００９】本発明はこのような問題点に鑑み、中間開
度時における総流量の減少を低減することのできる三方
ボール弁を提供するためになされたものである。The present invention has been made in view of the above problems, and has been made to provide a three-way ball valve capable of reducing a decrease in the total flow rate at an intermediate opening.

【００１０】[0010]

【課題を解決するための手段】請求項１に係わる三方ボ
ール弁は、弁軸と、前記弁軸が回動可能に挿入される軸
開口、前記弁軸の延長線上に位置する共通開口、前記弁
軸の軸線を挟んで両側に位置する第一開口及び第二開口
が形成された弁本体と、前記弁軸に形成された嵌合部が
挿入される嵌合孔、前記弁軸の延長線上に位置する共通
弁孔、前記弁軸の軸線を挟んで直角に位置する第一弁孔
及び第二弁孔とが形成され弁本体内に収納される弁ボー
ルとを備え、弁ボール内の各弁孔により形成される弁ボ
ール内流路に張り出す張出部を前記弁軸の延長線上に形
成したものである。According to a first aspect of the present invention, there is provided a three-way ball valve, comprising: a valve shaft; a shaft opening into which the valve shaft is rotatably inserted; a common opening located on an extension of the valve shaft; A valve body in which a first opening and a second opening located on both sides of the axis of the valve shaft are formed, a fitting hole into which a fitting portion formed in the valve shaft is inserted, and an extension of the valve shaft. A common valve hole, a first valve hole and a second valve hole positioned at right angles across the axis of the valve shaft, and a valve ball housed in the valve body. A projecting portion projecting into a flow path in the valve ball formed by the valve hole is formed on an extension of the valve shaft.

【００１１】請求項２に係わる三方ボール弁は、弁軸
と、前記弁軸が回動可能に挿入される軸開口、前記弁軸
の延長線上に位置し流体が流入する共通開口、前記弁軸
の軸線を挟んで両側に位置し流体が流出する第一開口及
び第二開口とが形成された弁本体と、前記弁軸に形成さ
れた嵌合部が挿入される嵌合孔、前記弁軸の延長線上に
位置する共通弁孔、前記弁軸の軸線を挟んで直角に位置
する第一弁孔及び第二弁孔が形成され弁本体内に収納さ
れる弁ボールとを備え、弁ボール内の各弁孔により形成
される弁ボール内流路に張り出す張出部を前記弁軸の延
長線上に形成されてなることを特徴とする三方ボール
弁。[0011] The three-way ball valve according to claim 2 is a valve shaft, a shaft opening into which the valve shaft is rotatably inserted, a common opening located on an extension of the valve shaft, into which fluid flows, and the valve shaft. A valve body having first and second openings formed on both sides of the axis of which the fluid flows out, a fitting hole into which a fitting portion formed in the valve shaft is inserted, and the valve shaft. A first valve hole and a second valve hole formed at right angles with respect to the axis of the valve shaft, and a valve ball housed in the valve body. A three-way ball valve, wherein a protruding portion that protrudes into a valve ball flow path formed by each valve hole is formed on an extension of the valve shaft.

【００１２】請求項３に係わる三方ボール弁は、弁軸
と、前記弁軸が回動可能に挿入される軸開口、前記弁軸
の延長線上に位置する共通開口、前記弁軸の軸線を挟ん
で両側に位置する第一開口及び第二開口が形成された弁
本体と、前記弁軸に形成された嵌合部が挿入される貫通
孔、前記弁軸の延長線上に位置する共通弁孔、前記弁軸
の軸線を挟んで直角に位置する第一弁孔及び第二弁孔と
が形成され弁本体内に収納される弁ボールとを備え、弁
ボール内の各弁孔により形成される弁ボール内流路に張
り出す張出部を前記弁軸の延長線上に前記嵌合部と一体
に形成したものである。A three-way ball valve according to a third aspect of the present invention sandwiches a valve shaft, a shaft opening into which the valve shaft is rotatably inserted, a common opening located on an extension of the valve shaft, and an axis of the valve shaft. A valve body in which the first opening and the second opening located on both sides are formed, a through hole into which a fitting portion formed in the valve shaft is inserted, a common valve hole located on an extension of the valve shaft, A valve ball formed with a first valve hole and a second valve hole positioned at right angles with respect to the axis of the valve shaft and housed in a valve body, and a valve formed by each valve hole in the valve ball A protruding portion that protrudes into the in-ball passage is formed integrally with the fitting portion on an extension of the valve shaft.

【００１３】[0013]

【発明の実施の形態】図１はこの発明の実施の形態の一
つである三方ボール弁の縦断面図である。１は弁軸であ
り、図示せぬ電動アクチュエータ又はハンドル等により
回動操作される。２は弁本体であり、弁軸１を回動可能
に挿入される軸開口３、弁軸の延長線上に位置する共通
開口４、弁軸１の軸線を挟んで両側に位置する第一開口
５及び第二開口６が形成されている。７は弁ボールであ
り、弁軸１に形成された嵌合部８が挿入される貫通孔９
（嵌合孔）、弁軸８の延長線上に位置する共通弁孔１
０、弁軸８の軸線を挟んで直角に位置する第一弁孔１１
及び第二弁孔１２とが形成され、弁本体２内に収納され
る。共通弁孔１０、第一弁孔１１、第二弁孔１２は弁ボ
ール７内で互いにＬ字型流路を形成している。FIG. 1 is a longitudinal sectional view of a three-way ball valve according to an embodiment of the present invention. Reference numeral 1 denotes a valve shaft, which is rotated by an electric actuator or a handle (not shown). Reference numeral 2 denotes a valve body, which includes a shaft opening 3 into which the valve shaft 1 is rotatably inserted, a common opening 4 located on an extension of the valve shaft, and first openings 5 located on both sides of the axis of the valve shaft 1. And a second opening 6. Reference numeral 7 denotes a valve ball, which is a through hole 9 into which a fitting portion 8 formed on the valve shaft 1 is inserted.
(Fitting hole), common valve hole 1 located on an extension of valve shaft 8
0, the first valve hole 11 located at right angles with respect to the axis of the valve shaft 8
And the second valve hole 12 are formed and housed in the valve body 2. The common valve hole 10, the first valve hole 11, and the second valve hole 12 mutually form an L-shaped flow path in the valve ball 7.

【００１４】弁軸１の嵌合部８の先には嵌合部８を同一
断面形状のまま軸線方向に延伸させてなる張出部１４が
嵌合部８と一体に形成されている。この張出部１４は貫
通孔９から弁ボール７内の流路に張り出して共通弁孔１
０の開口面のやや手前まで延びている。A projecting portion 14 is formed integrally with the fitting portion 8 at the tip of the fitting portion 8 of the valve shaft 1 by extending the fitting portion 8 in the axial direction while keeping the same sectional shape. The projecting portion 14 projects from the through hole 9 to the flow path in the valve ball 7 to form the common valve hole 1.
It extends slightly to the front of the opening surface.

【００１５】弁軸１の周側面には環状溝２１ａ、２１ｂ
が形成され、軸開口３とのシールをとるためにそれぞれ
Ｏリング２２ａ、２２ｂがはめ込まれている。弁本体２
は弁ケース２４及び弁ボール挿入孔２５にねじ込まれた
取り外し部２６とから構成され、この取り外し部２６を
取り外した状態で弁ボール７を挿入し、これをねじ込む
ことで弁ボール７を固定する。弁ケース２４及び取り外
し部２６にはそれぞれ第一環状溝２７ａ、第二環状溝２
７ｂが形成され、それぞれシートリング２８ａ、２８ｂ
がはめ込まれている。このシートリング２８ａ、２８ｂ
により弁ボール７が支持されるとともに流体の漏れを防
いでいる。On the peripheral side surface of the valve shaft 1, annular grooves 21a and 21b are provided.
Are formed, and O-rings 22a and 22b are fitted to seal with the shaft opening 3, respectively. Valve body 2
Is composed of a valve case 24 and a removal portion 26 screwed into the valve ball insertion hole 25. The valve ball 7 is inserted with the removal portion 26 removed, and the valve ball 7 is fixed by screwing it. The first annular groove 27a and the second annular groove 2 are provided in the valve case 24 and the detaching portion 26, respectively.
7b are formed, and the seat rings 28a and 28b are respectively formed.
Is inlaid. The seat rings 28a, 28b
Supports the valve ball 7 and prevents fluid leakage.

【００１６】図２は図１の弁ボール７のＣ−Ｃ断面図で
ある。嵌合部８は弁軸１に平面カット部１３ａ、１３ｂ
を設けることにより形成され、略同一形状の貫通孔９と
ある程度の隙間を有して嵌合されている。この隙間は、
シートリング等が摩耗してシートリングと弁ボール７と
の間に隙間を生じるようになっても、流体圧力により弁
ボール７がシートリングに押しつけられて流体の漏れを
防ぐようにするために設けられているものである。FIG. 2 is a sectional view of the valve ball 7 taken along line CC of FIG. The fitting portion 8 has flat cut portions 13a, 13b on the valve shaft 1.
And is fitted with a through hole 9 of substantially the same shape with a certain gap. This gap is
Even if the seat ring or the like is worn to cause a gap between the seat ring and the valve ball 7, the valve ball 7 is pressed against the seat ring by the fluid pressure to prevent leakage of the fluid. It is what is being done.

【００１７】図３（ａ）、図３（ｂ）、図３（ｃ）は図
１のＤ−Ｄ断面図であり、それぞれ第一弁孔１１の弁開
度１００％、５０％、０％の状態を表しており、図中矢
印は混合時の流体の流れを表している。FIGS. 3 (a), 3 (b) and 3 (c) are cross-sectional views taken along the line DD in FIG. 1. The valve opening of the first valve hole 11 is 100%, 50% and 0%, respectively. The arrows in the figure indicate the flow of the fluid during mixing.

【００１８】図３（ｂ）の矢印で示すように、弁開度５
０％時には第一開口５側及び第二開口６側から流入する
流体は張出部１４のある部分においては張出部１４によ
って流れの方向が曲げられ、流体どうし衝突することは
ない。As shown by the arrow in FIG.
At 0%, the flow of the fluid flowing from the first opening 5 side and the second opening 6 side is bent by the overhanging portion 14 at a portion where the overhanging portion 14 exists, so that the fluids do not collide with each other.

【００１９】図４はこの実施の形態の三方ボール弁の流
量線図である。図４において横軸は第一弁孔１１の弁開
度（０％〜１００％）を表し、縦軸は絶対流量を表すも
のであり、図４の縦軸における流量が１のときの絶対流
量は図８の流量が１のときの絶対流量と等しい。図中実
線で表されるものものは、混合時、即ち流体が第一開口
５及び第二開口６から流入し共通開口４から流出すると
きの流量を示し、実線４０ａは第一開口５の流量、実線
４０ｂは第一開口６の流量、実線４０ｃは共通開口４の
流量（＝総流量）を示す。図中点線で表されるものは、
分流時、即ち流体が共通開口４から流入し第一開口５及
び第二開口６から流出するときの流量を示し、点線４１
ａは第一開口５の流量、点線４１ｂは第一開口６の流
量、点線４１ｃは共通開口４の流量（＝総流量）を示
す。なお、これらの実線及び点線は二重になっている
が、これは弁開度０％から弁開度１００％にしたときの
実測値と、弁開度１００％から０％にしたときの実測値
の両方を記載したことによるが、特に気にする必要はな
い。FIG. 4 is a flow chart of the three-way ball valve of this embodiment. In FIG. 4, the horizontal axis represents the valve opening (0% to 100%) of the first valve hole 11, the vertical axis represents the absolute flow rate, and the absolute flow rate when the flow rate on the vertical axis of FIG. Is equal to the absolute flow rate when the flow rate in FIG. The solid line in the figure indicates the flow rate when mixing, that is, when the fluid flows in from the first opening 5 and the second opening 6 and flows out from the common opening 4, and the solid line 40a indicates the flow rate in the first opening 5. The solid line 40b indicates the flow rate of the first opening 6, and the solid line 40c indicates the flow rate (= total flow rate) of the common opening 4. What is represented by the dotted line in the figure is
The flow rate at the time of split flow, that is, when the fluid flows in from the common opening 4 and flows out from the first opening 5 and the second opening 6, is indicated by a dotted line 41.
a indicates the flow rate of the first opening 5, the dotted line 41b indicates the flow rate of the first opening 6, and the dotted line 41c indicates the flow rate (= total flow rate) of the common opening 4. Note that the solid line and the dotted line are doubled. These are the actual measured values when the valve opening is changed from 0% to 100% and the actual measured values when the valve opening is changed from 100% to 0%. Although both values are listed, there is no need to worry.

【００２０】図４の実線４０ｃ、点線４１ｃから分かる
ように、混合時、分流時ともに中間開度時における総流
量の減少が従来技術に比べて低減されている。しかし特
筆すべきは混合時である。従来技術においては図８で示
すように分流時より混合時の方が中間開度時の総流量の
減少が大きかったにもかかわらず、本実施の形態におい
ては分流時より混合時の方が中間開度時の総流量の減少
が少なくなっている。これは、張出部１４が整流の効果
を奏し、対向する方向から流入する流体の衝突及び衝突
に伴う流れの乱れを抑制した結果であると考えられる。As can be seen from the solid line 40c and the dotted line 41c in FIG. 4, the decrease in the total flow rate at the time of the intermediate opening is reduced both at the time of mixing and at the time of branching as compared with the prior art. But what should be noted is when mixing. In the prior art, as shown in FIG. 8, although the reduction in the total flow rate at the time of the intermediate opening is larger than that at the time of the splitting, the mixing at the time of mixing is greater than that at the time of the splitting in the present embodiment. The decrease in the total flow rate during opening is reduced. This is considered to be the result of the overhanging portion 14 having a rectifying effect and suppressing the collision of the fluid flowing from the opposite direction and the disturbance of the flow due to the collision.

【００２１】また、張出部１４は嵌合部８と一体に形成
されておりかつ貫通孔９を貫通可能な断面形状となって
いるため、弁軸１を交換するだけで簡単に中間開度時の
総流量の減少を低減できるようになっている。Further, since the projecting portion 14 is formed integrally with the fitting portion 8 and has a cross-sectional shape capable of penetrating the through hole 9, the intermediate opening can be easily obtained simply by replacing the valve shaft 1. The decrease in the total flow rate at the time can be reduced.

【００２２】なお、本発明はこの実施の形態に限定され
るものではい。張出部は弁軸と一体に形成されたものに
限らず、例えば弁ボール内の流路の内面にねじ込み等に
より取り付けたものでも良い。また張出部は嵌合部と同
一断面のものに限らず、円筒状のものや、先端部を小径
に形成したものでも良い。The present invention is not limited to this embodiment. The overhang is not limited to the one formed integrally with the valve shaft, and may be, for example, one that is attached to the inner surface of the flow path in the valve ball by screwing or the like. Further, the projecting portion is not limited to the one having the same cross section as the fitting portion, but may be a cylindrical one or one having a small diameter at the tip.

【００２３】[0023]

【発明の効果】請求項１記載の発明によれば、中間開度
時における総流量の減少を低減することができる。請求
項２記載の発明によれば、対向する方向から流入する流
体の衝突及び衝突に伴う流れの乱れが抑制されるので、
中間開度時における総流量の減少を大きく低減すること
ができる。請求項３記載の発明によれば、弁軸を交換す
るだけで簡単に中間開度時における総流量の減少を低減
することができる。According to the first aspect of the present invention, it is possible to reduce the decrease in the total flow rate at the time of the intermediate opening. According to the second aspect of the invention, the collision of the fluid flowing from the opposite direction and the disturbance of the flow due to the collision are suppressed,
The decrease in the total flow rate at the time of the intermediate opening can be greatly reduced. According to the third aspect of the invention, it is possible to easily reduce the decrease in the total flow rate at the time of the intermediate opening simply by replacing the valve shaft.

【図面の簡単な説明】[Brief description of the drawings]

【図１】この発明の実施の形態の三方ボール弁の縦断面
図である。FIG. 1 is a longitudinal sectional view of a three-way ball valve according to an embodiment of the present invention.

【図２】図１の弁ボール７のＣ−Ｃ断面図である。FIG. 2 is a sectional view of the valve ball 7 of FIG. 1 taken along line CC.

【図３】図１のＤ−Ｄ断面図である。FIG. 3 is a sectional view taken along line DD of FIG. 1;

【図４】この発明の実施の形態の三方ボール弁の流量線
図である。FIG. 4 is a flow rate diagram of the three-way ball valve according to the embodiment of the present invention.

【図５】従来の三方ボール弁の縦断面図である。FIG. 5 is a longitudinal sectional view of a conventional three-way ball valve.

【図６】図５の弁ボール７のＡ−Ａ断面図である。FIG. 6 is a sectional view of the valve ball 7 taken along the line AA in FIG. 5;

【図７】図５のＢ−Ｂ断面図である。FIG. 7 is a sectional view taken along the line BB of FIG. 5;

【図８】従来の三方ボール弁の流量線図である。FIG. 8 is a flow chart of a conventional three-way ball valve.

【符号の説明】[Explanation of symbols]

１ 弁軸 ２ 弁本体 ３ 軸開口 ４ 共通開口 ５ 第一開口 ６ 第二開口 ７ 弁ボール ８ 嵌合部 ９ 貫通孔（嵌合孔） １０ 共通弁孔 １１ 第一弁孔 １２ 第二弁孔 １４ 張出部 REFERENCE SIGNS LIST 1 valve shaft 2 valve body 3 shaft opening 4 common opening 5 first opening 6 second opening 7 valve ball 8 fitting portion 9 through hole (fitting hole) 10 common valve hole 11 first valve hole 12 second valve hole 14 Overhang

Claims (3)

【特許請求の範囲】[Claims] 【請求項１】弁軸と、 前記弁軸が回動可能に挿入される軸開口、前記弁軸の延
長線上に位置する共通開口、前記弁軸の軸線を挟んで両
側に位置する第一開口及び第二開口が形成された弁本体
と、 前記弁軸に形成された嵌合部が挿入される嵌合孔、前記
弁軸の延長線上に位置する共通弁孔、前記弁軸の軸線を
挟んで直角に位置する第一弁孔及び第二弁孔とが形成さ
れ弁本体内に収納される弁ボールとを備え、 弁ボール内の各弁孔により形成される弁ボール内流路に
張り出す張出部を前記弁軸の延長線上に形成されてなる
ことを特徴とする三方ボール弁。1. A valve shaft, a shaft opening into which the valve shaft is rotatably inserted, a common opening located on an extension of the valve shaft, and first openings located on both sides of the axis of the valve shaft. And a valve body having a second opening formed therein, a fitting hole into which a fitting portion formed in the valve shaft is inserted, a common valve hole located on an extension of the valve shaft, and an axis of the valve shaft. A first valve hole and a second valve hole formed at right angles are formed in the valve body, and the valve ball is accommodated in the valve body. A three-way ball valve, wherein an overhang is formed on an extension of the valve shaft. 【請求項２】弁軸と、 前記弁軸が回動可能に挿入される軸開口、前記弁軸の延
長線上に位置し流体が流出する共通開口、前記弁軸の軸
線を挟んで両側に位置し流体が流入する第一開口及び第
二開口とが形成された弁本体と、 前記弁軸に形成された嵌合部が挿入される嵌合孔、前記
弁軸の延長線上に位置する共通弁孔、前記弁軸の軸線を
挟んで直角に位置する第一弁孔及び第二弁孔が形成され
弁本体内に収納される弁ボールとを備え、 弁ボール内の各弁孔により形成される弁ボール内流路に
張り出す張出部を前記弁軸の延長線上に形成されてなる
ことを特徴とする三方ボール弁。2. A valve shaft, a shaft opening through which the valve shaft is rotatably inserted, a common opening located on an extension of the valve shaft to allow fluid to flow out, and located on both sides of the axis of the valve shaft. A valve body formed with a first opening and a second opening through which a fluid flows, a fitting hole formed in the valve shaft, into which a fitting portion is inserted, and a common valve located on an extension of the valve shaft. A first valve hole and a second valve hole formed at right angles with the axis of the valve shaft interposed therebetween, and a valve ball housed in the valve body, formed by each valve hole in the valve ball. A three-way ball valve, wherein a projecting portion projecting into a valve ball passage is formed on an extension of the valve shaft. 【請求項３】弁軸と、 前記弁軸が回動可能に挿入される軸開口、前記弁軸の延
長線上に位置する共通開口、前記弁軸の軸線を挟んで両
側に位置する第一開口及び第二開口が形成された弁本体
と、 前記弁軸に形成された嵌合部が挿入される貫通孔、前記
弁軸の延長線上に位置する共通弁孔、前記弁軸の軸線を
挟んで直角に位置する第一弁孔及び第二弁孔とが形成さ
れ弁本体内に収納される弁ボールとを備え、 弁ボール内の各弁孔により形成される弁ボール内流路に
張り出す張出部を前記弁軸の延長線上に前記嵌合部と一
体に形成されてなることを特徴とする三方ボール弁。3. A valve shaft, a shaft opening into which the valve shaft is rotatably inserted, a common opening located on an extension of the valve shaft, and first openings located on both sides of the axis of the valve shaft. And a valve body having a second opening formed therein, a through hole into which a fitting portion formed in the valve shaft is inserted, a common valve hole located on an extension of the valve shaft, and an axis of the valve shaft interposed therebetween. A valve ball formed with a first valve hole and a second valve hole positioned at right angles and housed in a valve body, and extending over a flow path in the valve ball formed by each valve hole in the valve ball. A three-way ball valve, wherein a projecting portion is formed integrally with the fitting portion on an extension of the valve shaft.
JP2000320177A 2000-10-20 2000-10-20 3-way ball valve Expired - Lifetime JP4106173B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2000320177A JP4106173B2 (en) 2000-10-20 2000-10-20 3-way ball valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2000320177A JP4106173B2 (en) 2000-10-20 2000-10-20 3-way ball valve

Publications (2)

Publication Number Publication Date
JP2002130499A true JP2002130499A (en) 2002-05-09
JP4106173B2 JP4106173B2 (en) 2008-06-25

Family

ID=18798498

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2000320177A Expired - Lifetime JP4106173B2 (en) 2000-10-20 2000-10-20 3-way ball valve

Country Status (1)

Country Link
JP (1) JP4106173B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009168063A (en) * 2008-01-11 2009-07-30 Yamatake Corp Three-way ball valve
JP6144441B1 (en) * 2017-02-21 2017-06-07 伸和コントロールズ株式会社 Three-way valve for flow control and temperature control device using the same

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009168063A (en) * 2008-01-11 2009-07-30 Yamatake Corp Three-way ball valve
KR101094552B1 (en) 2008-01-11 2011-12-19 가부시키가이샤 야마다케 Three-way ball valve
JP6144441B1 (en) * 2017-02-21 2017-06-07 伸和コントロールズ株式会社 Three-way valve for flow control and temperature control device using the same

Also Published As

Publication number Publication date
JP4106173B2 (en) 2008-06-25

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