JPS6333022Y2 - - Google Patents

Description

【考案の詳細な説明】 本考案は大きな負荷圧力が作用する、しかも、
球形弁を有する回転バルブに関するものである。[Detailed description of the invention] The invention is designed to operate under large load pressure.
The present invention relates to a rotary valve with a spherical valve.

本考案は実開昭54−182951号公報に示された回
転バルブの改良であつて、上記回転バルブは、第
１図に示すように、流出口１を有するバルブ本体
２に形成した弁室３内に、貫通孔４を有する球形
の弁体５を挿入し、この弁体５をバルブ本体２に
挿入した弁棒６及び下部軸受７にて回転自在に支
持し、更にバルブ本体２の開口部に流入口８を有
する弁筒９を装着するようにしている。 The present invention is an improvement of the rotary valve disclosed in Japanese Utility Model Application Publication No. 54-182951, and the rotary valve has a valve chamber 3 formed in a valve body 2 having an outlet 1, as shown in FIG. A spherical valve body 5 having a through hole 4 is inserted into the inside, and this valve body 5 is rotatably supported by a valve stem 6 inserted into the valve body 2 and a lower bearing 7, and further, the opening of the valve body 2 is A valve cylinder 9 having an inlet 8 is attached to the valve body.

上記したような回転バルブは、弁体５を回動さ
せて流路を閉止した際、弁体５の外周面に当接し
得る様にした内周縁円孔１０を有する円板状のシ
ール部材１１を、バルブ本体２と弁筒９との境界
部にパツキン１２を介して装着し、バルブ閉塞
時、弁体５の外周面と、弁室３の内周面との間に
形成された隙間ｌよりの流体のリークを防止する
ようにしている。 The rotary valve described above includes a disc-shaped sealing member 11 having an inner peripheral circular hole 10 that can come into contact with the outer peripheral surface of the valve element 5 when the valve element 5 is rotated to close the flow path. is attached to the boundary between the valve body 2 and the valve cylinder 9 via a packing 12, and the gap l formed between the outer circumferential surface of the valve body 5 and the inner circumferential surface of the valve chamber 3 when the valve is closed is This is to prevent further fluid leaks.

この形式の回転バルブは、バルブ本体２の開口
部の内径をできるだけ小径として弁体５の外周面
に近接させ、シール部材１１のバツクアツプを十
分に行わせれば、シール部材１１が薄くても問題
はないが、上記バルブ本体２の開口部から弁体５
を挿入する必要があるため、その内径を小さくす
ることには制約があり、シール部材１１のバツク
アツプ力が不足し、使用条件（高圧）によつて
は、シール部材１１の肉厚を第２図のように厚く
しなければならない場合がある。 In this type of rotary valve, if the inner diameter of the opening of the valve body 2 is made as small as possible and brought close to the outer peripheral surface of the valve body 5, and the seal member 11 is sufficiently backed up, there will be no problem even if the seal member 11 is thin. However, the valve body 5 can be removed from the opening of the valve body 2.
Since it is necessary to insert a In some cases, it may be necessary to make it thicker.

ところが、このように円板状のシール部材１１
の肉厚を厚くすると、シール部材１１は通常金属
製であるため、シール部材１１自体の弾性が非常
に少なくなり、弁体５とシール部材１１との接触
部の摩耗が激しくなると同時に弁体５を回動させ
る時の回転トルクが増大するといつた不都合があ
つた。 However, in this way, the disk-shaped seal member 11
If the wall thickness of the seal member 11 is made thicker, the elasticity of the seal member 11 itself becomes very low because the seal member 11 is usually made of metal, and the contact portion between the valve body 5 and the seal member 11 becomes more abraded, and at the same time, the valve body 5 There was an inconvenience that the rotational torque when rotating increased.

このため、従来肉厚の厚いシール部材１１を使
用するときは、第３図に示すように、シール部材
１１と弁体５との間に若干の隙間ｍが形成される
ようにしている。しかし、このようにシール部材
１１と弁体５との間に隙間ｍを形成すると、この
隙間ｍからのリーク量が多くなるといつた欠点が
あつた。 For this reason, when a conventionally thick sealing member 11 is used, a slight gap m is formed between the sealing member 11 and the valve body 5, as shown in FIG. However, when the gap m is formed between the seal member 11 and the valve body 5 in this way, there is a drawback that the amount of leakage from the gap m increases.

本考案は円板状で、かつ、肉厚の厚いシール部
材を弁体にソフトタツチで接触させ得るようにな
すことにより、上記従来の欠点を改良除去したも
のであり、以下本考案の詳細を図面に示す実施例
に従つて説明すると次の通りである。 The present invention improves and eliminates the above-mentioned conventional drawbacks by making a disc-shaped, thick-walled sealing member that can be brought into soft touch contact with the valve body.The details of the present invention are described below in the drawings. The following is an explanation based on the embodiment shown in .

尚、図中第１図乃至第３図と同一符号のものは
同一構成内容のものを示す。 In the drawings, the same reference numerals as in FIGS. 1 to 3 indicate the same components.

第４図は、本考案に係る円板状のシール部材２
０をバルブ本体２と弁筒９との境界部にパツキン
１２を介して装着し、シール部材２０に形成した
円孔２１の内周縁２２を、バルブ本体２の弁室３
内に収納した弁体５の外周面に接触させた状態を
示す図面であり、この図に示す円板状で、かつ、
肉厚の厚いシール部材２０は、その表面の全周に
断面凹状をした溝部２３を形成してある。 FIG. 4 shows a disc-shaped sealing member 2 according to the present invention.
0 is attached to the boundary between the valve body 2 and the valve cylinder 9 via the packing 12, and the inner peripheral edge 22 of the circular hole 21 formed in the seal member 20 is inserted into the valve chamber 3 of the valve body 2.
This is a drawing showing a state in which the valve body 5 is brought into contact with the outer circumferential surface of the valve body 5 housed in the valve body 5.
The thick sealing member 20 has a groove 23 having a concave cross section formed all around its surface.

このように、円板状で、かつ、肉厚の厚いシー
ル部材２０の所定部位に溝部２３を形成しておけ
ば、シール部材２０の強度を低下させることなく
シール部材２０に充分な弾性をもたすことができ
る。このため、シール部材２０の円孔２１の内周
縁２２を弁体５の外周面に接触させても、当該部
分にて発生する摩耗の大幅な増加及び弁体５の回
転トルクの増大を招く心配がないため、円孔２１
の内周縁２２と弁体５の外周面との間に隙間を設
ける必要がなくなり、当該部分からのリーク量を
減少さすことができる。 In this way, by forming the groove portion 23 at a predetermined portion of the disc-shaped and thick-walled sealing member 20, sufficient elasticity can be provided to the sealing member 20 without reducing the strength of the sealing member 20. I can do it. Therefore, even if the inner circumferential edge 22 of the circular hole 21 of the sealing member 20 is brought into contact with the outer circumferential surface of the valve body 5, there is a risk that the wear occurring at this part will increase significantly and the rotational torque of the valve body 5 will increase. Because there is no circular hole 21
There is no need to provide a gap between the inner circumferential edge 22 of the valve body 5 and the outer circumferential surface of the valve body 5, and the amount of leakage from this portion can be reduced.

尚、円板状で、かつ、肉厚の厚いシール部材２
０の一部に形成する溝部２３の形状は、第４図に
示した凹溝状にする以外に、例えば第５図に示す
ような断面Ｕ字状Ｖ字状等にしてもよい。又、溝
部２３の形成位置は、円板状で、かつ、肉厚の厚
いシール部材２０の流入側でも流出側でもよく、
更に溝部２３は上述した如くシール部材２０に１
個設ける以外に、シール部材２０の任意の個所に
複数個設けるようにしてもよい。 In addition, the sealing member 2 is disc-shaped and has a thick wall.
The shape of the groove part 23 formed in a part of 0 may be, for example, U-shaped or V-shaped in cross section as shown in FIG. 5, in addition to the groove shape shown in FIG. Further, the groove portion 23 may be formed at either the inflow side or the outflow side of the disc-shaped and thick-walled sealing member 20.
Furthermore, the groove portion 23 is formed in the sealing member 20 as described above.
In addition to providing one, a plurality of them may be provided at any location on the seal member 20.

又、シール部材２０に形成した円孔２１の内周
縁２２と、弁体５との接触状態は、第４図に示し
たように内周縁２２の一部を弁体５の表面に接触
させる以外に、第５図に示す如く、円孔２１の内
周縁２２の全面を、弁体５の表面に接触させるよ
うにしてもよい。 Further, the state of contact between the inner circumferential edge 22 of the circular hole 21 formed in the sealing member 20 and the valve body 5 is other than that a part of the inner circumferential edge 22 is brought into contact with the surface of the valve body 5 as shown in FIG. Alternatively, as shown in FIG. 5, the entire inner peripheral edge 22 of the circular hole 21 may be brought into contact with the surface of the valve body 5.

以上説明したように、本考案は、回転可能な弁
体を収容し且つ一方に流出口を有し、他方に開口
部を有するバルブ本体と、上記開口部に締着さ
れ、流入口を形成する弁筒と、上記バルブ本体と
弁筒との接合面間にパツキンを介して挟在される
シール部材とよりなる回転バルブにおいて、上記
シール部材を厚肉円板状となし、その内周縁円孔
を弁体の外周面に隙間なく接触させ、かつ、該シ
ール部材の内周縁円孔とバルブ本体の開口部内周
縁円孔との間の位置におけるシール部材の側面に
環状の溝部を形成し、該溝部を境界として外周側
円板部分と内周側円板部分とに分け、該溝部で弾
性的に屈曲変形を容易化したから、バルブ本体と
弁筒との接合面間にパツキンを介してシール部材
を挟在させた形式の回転バルブのシール部材を厚
肉円板状として必要な強度を保持させることがで
き、しかもシール部材を厚肉円板状としたにも拘
らず、環状溝部の存在で溝底部が他の部分より薄
肉となり、この薄肉部（環状溝部）を境界とし
て、円板状シール部材の外周側円板部分と内周側
円板部分とが相対的に中心円孔軸線方向に弾性的
に屈曲変形し易くなり、いわゆる腰が柔軟となつ
て、弁体外周面に隙間なくソフトタツチで密接さ
せることができ、弁体の回動抵抗及び摩耗が軽減
され、軽く回動操作でき、流体の漏れを防止でき
る。 As explained above, the present invention includes a valve body that houses a rotatable valve body and has an outlet on one side and an opening on the other side, and a valve body that is fastened to the opening to form an inlet. In a rotary valve comprising a valve cylinder and a sealing member sandwiched between the joint surfaces of the valve body and the valve cylinder via a packing, the sealing member is in the shape of a thick disk, and the inner circumferential edge of the rotary valve has a circular hole. contacting the outer circumferential surface of the valve body without a gap, and forming an annular groove on the side surface of the sealing member at a position between the inner circumferential edge circular hole of the sealing member and the opening inner circumferential edge circular hole of the valve body; The groove is used as a boundary to separate the outer circumferential disc part and the inner circumferential disc part, and since the groove part facilitates elastic bending deformation, a seal is created between the joint surface of the valve body and the valve barrel via a packing. The necessary strength can be maintained by making the sealing member of the rotary valve of the type in which the members are sandwiched in a thick-walled disk shape, and even though the sealing member is made into the thick-walled disk-like shape, the existence of an annular groove portion can be avoided. The bottom of the groove is thinner than other parts, and with this thin wall (annular groove) as a boundary, the outer and inner disk parts of the disk-shaped seal member are relatively aligned in the center hole axis direction. It becomes easier to bend and deform elastically, and the so-called waist becomes flexible, allowing it to be brought into close contact with the outer circumferential surface of the valve body with a soft touch without any gaps, reducing rotational resistance and wear of the valve body, and allowing easy rotation operation. , can prevent fluid leakage.

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

第１図は回転バルブの構造を示す断面図、第２
図及び第３図は、従来の肉厚の厚いシール部材を
使用した回転バルブの要部断面図、第４図及び第
５図は本考案に係る肉厚の厚いシール部材を使用
した回転バルブの要部断面図である。 ２……バルブ本体、３……弁室、５……弁体、
９……弁筒、２０……シール部材、２１……円
孔、２２……内周縁、２３……溝部。 Figure 1 is a sectional view showing the structure of a rotary valve, Figure 2 is a sectional view showing the structure of a rotary valve.
3 and 3 are cross-sectional views of main parts of a rotary valve using a conventional thick-walled seal member, and FIGS. 4 and 5 are cross-sectional views of a rotary valve using a thick-walled seal member according to the present invention. It is a sectional view of the main part. 2... Valve body, 3... Valve chamber, 5... Valve body,
9...Valve barrel, 20...Sealing member, 21...Circular hole, 22...Inner peripheral edge, 23...Groove portion.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 回転可能な弁体を収容し且つ一方に流出口を有
し、他方に開口部を有するバルブ本体と、上記開
口部に締着され、流入口を形成する弁筒と、上記
バルブ本体と弁筒との接合面間にパツキンを介し
て挟在されるシール部材とよりなる回転バルブに
おいて、上記シール部材を厚肉円板状となし、そ
の内周縁円孔を弁体の外周面に隙間なく接触さ
せ、かつ、該シール部材の内周縁円孔とバルブ本
体の開口部内周縁円孔との間の位置におけるシー
ル部材の側面に環状の溝部を形成し、該溝部を境
界として外周側円板部分と内周側円板部分とに分
け、該溝部で弾性的に屈曲変形を容易化したこと
を特徴とする回転バルブ。 A valve body that accommodates a rotatable valve body and has an outflow port on one side and an opening on the other side, a valve barrel that is fastened to the opening and forms an inflow port, and the valve body and the valve barrel. In a rotary valve consisting of a sealing member sandwiched between the joint surfaces with a gasket via a seal, the sealing member is shaped like a thick disk, and its inner circumferential circular hole contacts the outer circumferential surface of the valve body without any gaps. and an annular groove is formed on the side surface of the sealing member at a position between the inner circumferential edge circular hole of the sealing member and the opening inner circumferential edge circular hole of the valve body, and the outer circumferential disk portion is formed with the groove as a boundary. 1. A rotary valve characterized in that the rotary valve is divided into an inner circumferential disk portion and the groove portion facilitates elastic bending deformation.