JP2001027344A - Pressure regulating valve - Google Patents
Pressure regulating valveInfo
- Publication number
- JP2001027344A JP2001027344A JP11196852A JP19685299A JP2001027344A JP 2001027344 A JP2001027344 A JP 2001027344A JP 11196852 A JP11196852 A JP 11196852A JP 19685299 A JP19685299 A JP 19685299A JP 2001027344 A JP2001027344 A JP 2001027344A
- Authority
- JP
- Japan
- Prior art keywords
- valve
- valve rod
- guide hole
- pressure
- flow path
- 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】本発明は蒸気などの気体を制
御する圧力調整弁に関する。The present invention relates to a pressure regulating valve for controlling a gas such as steam.
【０００２】[0002]
【従来の技術】従来、この種の圧力調整弁としては、図
９(a) に示す減圧弁ａ、図９(b) に示す背圧弁ｂが挙げ
られる。この圧力調整弁ａ、ｂは、弁箱ｃ内に設けた１
次側流路ｄと２次側流路ｅを弁口ｆを介して連通し、減
圧弁ａでは２次側流路ｅを、背圧弁ｂでは１次側流路ｄ
を、隔壁ｇを介して圧力調節室ｈと区画している。そし
て、隔壁ｇに設けた圧力検出孔ｉを介して、減圧弁ａで
は２次側流路ｅと圧力調節室ｈとを、背圧弁ｂでは１次
側流路ｄと圧力調節室ｈとを連通し、前記隔壁ｇに設け
た弁棒案内孔ｊに弁棒ｋを摺動自在に挿通し、該弁棒ｋ
で圧力調節室ｈに設けた圧力調整手段ｍ（主に調節バネ
ｎ及びダイヤフラムｐで構成）と弁口ｆを開閉する弁体
ｑとを連繋している。ところで、上記構成の圧力調整弁
ａ、ｂにおいて、弁棒ｋの摺動不良防止対策として、弁
棒ｋにメッキ等の表面加工を施したり、弁棒ｋとその弁
棒案内孔ｊとの隙間を広げることにより、弁棒ｋに作用
する摩擦抵抗や摺動抵抗を減少させて摺動不良を防止し
ていた。2. Description of the Related Art Conventionally, as this kind of pressure regulating valve, there are a pressure reducing valve a shown in FIG. 9A and a back pressure valve b shown in FIG. 9B. The pressure regulating valves a and b are provided in a valve box
The secondary flow path d and the secondary flow path e communicate with each other through a valve port f. The secondary flow path e is connected to the pressure reducing valve a, and the primary flow path d is connected to the back pressure valve b.
Is partitioned from the pressure adjustment chamber h via a partition wall g. Then, through a pressure detection hole i provided in the partition wall g, the pressure reducing valve a connects the secondary flow path e and the pressure control chamber h, and the back pressure valve b connects the primary flow path d and the pressure control chamber h. The valve stem k is slidably inserted through a valve stem guide hole j provided in the partition wall g.
A pressure adjusting means m (mainly composed of an adjusting spring n and a diaphragm p) provided in a pressure adjusting chamber h is connected to a valve q for opening and closing a valve port f. By the way, in the pressure regulating valves a and b having the above-described structure, as a measure for preventing the sliding failure of the valve rod k, the valve rod k is subjected to surface processing such as plating, or a gap between the valve rod k and the valve rod guide hole j. , The frictional resistance and the sliding resistance acting on the valve stem k are reduced to prevent poor sliding.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、前者の
手段では、弁棒ｋにおける弁棒案内孔ｊとの摩擦抵抗を
減少させることは出来るが、弁棒ｋと弁棒案内孔ｊとの
隙間は狭いままの為、この隙間にゴミ等が侵入してゴミ
噛みを生じ、摺動不良を起こす課題を有していた。又、
後者の手段では、摺動抵抗が少なくなるので、ゴミ噛み
による摺動不良は起きなくなるが、弁棒ｋと弁棒案内孔
ｊとの隙間から蒸気などの気体が圧力調整室ｈに侵入
し、圧力調整弁ａ、ｂの流量特性を損なっていた。However, the former means can reduce the frictional resistance between the valve stem k and the valve stem guide hole j, but the gap between the valve stem k and the valve stem guide hole j is small. Since the gap is kept narrow, dust or the like enters the gap, causing the dust to bite, and has a problem of causing sliding failure. or,
In the latter means, sliding resistance is reduced, so that sliding failure due to dust biting does not occur, but gas such as steam enters the pressure adjusting chamber h from the gap between the valve rod k and the valve rod guide hole j, The flow characteristics of the pressure control valves a and b were impaired.
【０００４】[0004]
【課題を解決するための手段】本発明は、上記課題に鑑
み、圧力調整弁において、弁棒における弁棒案内孔との
摺動部に複数の環状溝を設けることにより、弁棒案内孔
との摺動抵抗を減らすと共に、弁棒案内孔との間に狭い
隙間と広い隙間が交互に構成されることで、その絞り効
果を発揮させ、弁棒と弁棒案内孔の隙間からの圧力調整
室への蒸気の侵入を防止する様にして、上記課題を解決
する。SUMMARY OF THE INVENTION In view of the above-mentioned problems, the present invention provides a pressure regulating valve, in which a plurality of annular grooves are provided in a sliding portion of a valve stem that slides with the valve stem guiding hole, so that the valve stem guiding hole is formed. In addition to reducing the sliding resistance of the valve, the narrow gap and the wide gap are alternately configured between the valve stem and the valve stem guide hole, thereby exerting the throttle effect, and adjusting the pressure from the gap between the valve stem and the valve stem guide hole. The problem is solved by preventing vapor from entering the chamber.
【０００５】[0005]
【発明の実施の形態】以下本発明の一実施例を図面に基
づいて説明する。図１は圧力調整弁の１つである減圧弁
の断面図を示す。この減圧弁１は、蒸気ライン（配管）
中に組み付けて成り、弁箱２と、圧力調整手段３を備え
た圧力調整室４とから主に構成している。弁箱２は、そ
の左右両側方に入口５及び出口６を開設すると共に、内
部に入口５と出口６の夫々に通ずる１次側流路７及び２
次側流路８を設けている。上記両流路７、８は、弁箱２
内部において、１次側流路７を下側に、２次側流路８を
上側にして略平行配置して成り、弁箱２内部に設けた隔
壁９にて区画されている。隔壁９には、両流路７、８に
対し直交する様に弁口10を開設し、該弁口10を介して両
流路７、８を連通している。そして、弁口10において、
１次側開口部周縁に弁座11を設け、該弁座11には、これ
に対し垂直移動する様に着離自在に設けた弁体12（ボー
ル弁）で、弁口10を開閉する様に成している。弁体12の
背部と、１次側流路７中で弁座11との対向壁13との間に
は、円錐コイルバネから成る弁バネ14を介装し、該弁バ
ネ14にて弁体12を閉弁方向に付勢している。そして、弁
体12を囲繞するスクリーン15を弁座11側から上記対向壁
13に渡って設けている。スクリーン15は、図２及び図３
に示す様に、その基体を円筒状に形成して成り、弁座側
基端（上端）15ａから弁体12の移動距離範囲（リフト）
Ｘに渡って障壁16を形成し、それ以外の部分に複数の小
孔17、17ａ…を貫設している。又、スクリーン15におい
て、小孔17、17ａ…の形成域（障壁16を除く部位）に
は、小孔17、17ａ…よりメッシュの細かい網状筒（図示
せず）を外装している。DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a sectional view of a pressure reducing valve which is one of the pressure regulating valves. This pressure reducing valve 1 is a steam line (piping)
It is mainly composed of a valve box 2 and a pressure adjusting chamber 4 provided with a pressure adjusting means 3. The valve box 2 has an inlet 5 and an outlet 6 on both left and right sides thereof, and has primary passages 7 and 2 therein which communicate with the inlet 5 and the outlet 6, respectively.
A secondary flow path 8 is provided. The two flow paths 7 and 8 are connected to the valve box 2
Inside, the primary side flow path 7 is disposed on the lower side, and the secondary side flow path 8 is disposed on the upper side, in a substantially parallel arrangement, and is partitioned by a partition 9 provided inside the valve box 2. A valve port 10 is opened in the partition wall 9 so as to be orthogonal to the two flow paths 7 and 8, and the two flow paths 7 and 8 communicate with each other through the valve port 10. And at the valve port 10,
A valve seat 11 is provided on the periphery of the primary opening, and the valve seat 10 is opened and closed by a valve body 12 (ball valve) provided so as to be vertically movable with respect to the valve seat 11. It consists of A valve spring 14 composed of a conical coil spring is interposed between the back of the valve body 12 and the wall 13 facing the valve seat 11 in the primary flow path 7. Is biased in the valve closing direction. Then, the screen 15 surrounding the valve body 12 is moved from the valve seat 11 side to the above-mentioned opposite wall.
13 are provided. The screen 15 is shown in FIGS.
As shown in the figure, the base is formed in a cylindrical shape, and the moving distance range (lift) of the valve body 12 from the base end (upper end) 15a on the valve seat side.
A barrier 16 is formed over X, and a plurality of small holes 17, 17a. In the screen 15, a mesh tube (not shown) having a finer mesh than the small holes 17, 17 a is provided in an area where the small holes 17, 17 a are formed (excluding the barrier 16).
【０００６】圧力調整室４は、２次側流路８の上部に隔
壁9aを介して区画して設けられ、該隔壁9aに貫設した圧
力検出孔18を介して２次側流路８に連通している。又、
圧力調整室４の底部中央（隔壁9a）で弁口10との対応部
位には、弁棒案内孔19を貫設し、該弁棒案内孔19に弁棒
20を摺動自在に挿通し、該弁棒20の先端（下端）を弁口
10を通して弁体12に当接連繋している。そして、弁棒20
の基端（上端）には、Ｅリング21を装着固定し、弁棒案
内孔19からの下方脱落を防止している。又、弁棒20にお
いて、弁棒案内孔19との摺動部20ａには、その円周方向
に渡って刻設した環状溝22を複数条形成している。この
環状溝22は、図示した様に、その溝自体が連続した螺旋
溝も含む。要するに、環状溝22の形成によって、摺動部
20ａと弁棒案内孔19との間に狭い隙間S1と広い隙間S2を
交互に構成したものであれば良い。又、弁棒20におい
て、その全体又は環状溝22を設けた摺動部20ａにメッキ
などの表面処理を施し、弁棒案内孔19との摩擦抵抗を減
少する様に成しても良い。又、弁箱２の上部には、ダイ
ヤフラム又はベローズから成る圧力・変位変換要素23
（図示例ではベローズ）を介してボンネット24を固定
し、圧力・変位変換要素23にて圧力調整室４をボンネッ
ト24の内部と気密的に遮断している。そして、圧力・変
位変換要素23の中央部を弁棒20の上端に当接している。The pressure regulating chamber 4 is provided above the secondary flow path 8 with a partition 9a interposed therebetween, and is connected to the secondary flow path 8 through a pressure detection hole 18 penetrating through the partition 9a. Communicating. or,
At the center of the bottom of the pressure regulating chamber 4 (partition wall 9a), at a position corresponding to the valve port 10, a valve stem guide hole 19 is provided.
20 is slidably inserted, and the tip (lower end) of the valve stem 20 is connected to the valve port.
It is in contact with the valve body 12 through 10. And valve stem 20
An E-ring 21 is attached and fixed to the base end (upper end) of the base member to prevent it from falling down from the valve stem guide hole 19. In the valve stem 20, a plurality of annular grooves 22 are formed in the sliding portion 20a with the valve stem guide hole 19 in the circumferential direction. As shown, the annular groove 22 also includes a spiral groove in which the groove itself is continuous. In short, by forming the annular groove 22, the sliding portion
Any structure may be used as long as narrow gaps S1 and wide gaps S2 are alternately formed between 20a and the stem guide hole 19. Further, in the valve stem 20, a surface treatment such as plating may be applied to the whole or the sliding portion 20 a provided with the annular groove 22 so as to reduce the frictional resistance with the valve stem guide hole 19. A pressure / displacement conversion element 23 made of a diaphragm or bellows is provided on the upper part of the valve box 2.
The hood 24 is fixed via a bellows (in the illustrated example), and the pressure-adjustment chamber 4 is airtightly shut off from the inside of the hood 24 by the pressure / displacement conversion element 23. The central portion of the pressure / displacement conversion element 23 is in contact with the upper end of the valve stem 20.
【０００７】ボンネット24は、その上方の左右両側方に
所定の上下長さに渡って設けたスリット25、25ａを形成
すると共に、ボンネット24の中心軸線上において、ボン
ネット24の上方外部から内方下部に渡って棒状の調節ネ
ジ26を回転自在に配設している。調節ネジ26は、ボンネ
ット24の内方に存する部位において、その上部から下方
に渡ってネジ部27を設け、ボンネット24の上端部より上
方突設した突端部（上端部）28を後述するハンドル29に
連結している。又、突端部28の付け根には、Ｅリング30
を装着固定し、調節ネジ26の下方脱落を防止し、突端部
28の中途部位には、これに直交する様にスプリングピン
31を貫通固定している。尚、図中、32は座金である。ネ
ジ部27には、バネ受け33を螺着しており、該バネ受け33
の左右側方に水平突出した突片34、34ａの先端側を、ボ
ンネット24のスリット25、25ａに挿通してバネ受け33の
回り止めとし、調節ネジ26の回転でバネ受け33がネジ部
27に沿って上下移動する様に成している。そして、バネ
受け33と圧力・変位変換要素23の間に調節バネ35を介装
し、該調節バネ35により、弁棒20を介して弁体12を開弁
方向に付勢する様に成している。The bonnet 24 has slits 25 and 25a formed over the upper and lower sides thereof over a predetermined vertical length, and is formed on the central axis of the bonnet 24 from above the outside of the bonnet 24 to the inside thereof. , A rod-shaped adjusting screw 26 is rotatably arranged. The adjusting screw 26 is provided with a screw portion 27 extending from an upper portion to a lower portion in a portion existing inside the bonnet 24, and a protrusion (upper end portion) 28 projecting upward from an upper end portion of the bonnet 24 is attached to a handle 29 described later. It is connected to. At the base of the tip 28, an E-ring 30
To prevent the adjustment screw 26 from falling down,
On the middle part of 28, set a spring pin
31 is fixed through. In the drawing, reference numeral 32 denotes a washer. A spring receiver 33 is screwed into the screw portion 27, and the spring receiver 33 is
The distal ends of the projecting pieces 34, 34a horizontally protruding to the left and right sides are inserted into the slits 25, 25a of the bonnet 24 so as to stop the spring receiver 33 from rotating.
It moves up and down along 27. An adjusting spring 35 is interposed between the spring receiver 33 and the pressure / displacement converting element 23, and the adjusting spring 35 urges the valve body 12 through the valve rod 20 in the valve opening direction. ing.
【０００８】ハンドル29は、その基体をキャップ状に形
成して成り、その上端部中央には、略円形状の凹部36を
設けると共に、その中心に調節ネジ26の突端部28を挿入
している。そして、上記凹部36の形成によって、ハンド
ル29の内方へ突出した凹部36の外底部には、その直径方
向に１条の凹溝37を形成し、該凹溝37に、突端部28に設
けたスプリングピン31を配している。凹部36内におい
て、突端部28の最上端に設けたバネ受け38と、凹部36の
内底の間に円錐コイルバネ39を介装し、調節ネジ26とハ
ンドル29を連結している。又、ハンドル29の内部におい
て、上記凹部36の外周面適所には、所定数の邪魔板40、
40ａを外方突設している。邪魔板40、40ａの回転軌道上
にして、且つボンネット24の上端部には、所定数の突起
41を上方突設し、ハンドル29を突起41の高さより上方へ
引き上げて回転しない限り、突起41に邪魔板40、40ａが
衝突し、ハンドル29が回転しない様に成している。従っ
て、調節ネジ26を回転させるには、ハンドル29を上記バ
ネ39の弾性力に抗して突起41の高さより上方へ引き上
げ、ハンドル29を回転させることで成し得る。そして、
調節ネジ26の回転により、バネ受け33をネジ部27に沿っ
て上下移動させ、調節バネ35の伸縮させ、調節バネ35の
弾性力を調整する様に成している。The handle 29 has a base formed in a cap shape. A substantially circular concave portion 36 is provided at the center of the upper end, and the protruding end 28 of the adjusting screw 26 is inserted into the center of the concave portion 36. . Due to the formation of the concave portion 36, one concave groove 37 is formed in the outer bottom of the concave portion 36 protruding inward of the handle 29 in the diametric direction, and the concave groove 37 is provided in the protruding end portion 28. The spring pin 31 is arranged. In the recess 36, a conical coil spring 39 is interposed between the spring receiver 38 provided at the uppermost end of the protruding end 28 and the inner bottom of the recess 36, and the adjusting screw 26 and the handle 29 are connected. Also, inside the handle 29, a predetermined number of baffle plates 40
40a protrudes outward. A predetermined number of protrusions are provided on the rotation orbit of the baffle plates 40 and 40a and on the upper end of the bonnet 24.
Unless the handle 29 is pulled upward from the height of the protrusion 41 and rotated, the baffle plates 40 and 40a collide with the protrusion 41 and the handle 29 does not rotate unless the handle 41 is rotated upward. Therefore, to rotate the adjustment screw 26, the handle 29 can be lifted above the height of the projection 41 against the elastic force of the spring 39, and the handle 29 can be rotated. And
The rotation of the adjusting screw 26 causes the spring receiver 33 to move up and down along the screw portion 27 so that the adjusting spring 35 expands and contracts, and the elastic force of the adjusting spring 35 is adjusted.
【０００９】上記実施例においては、図１及び図２、詳
細には図４に示す様に、弁体12と弁棒20を分離したもの
を示したが、図５に示す様に、これらを一体形成したも
のでも良い。又、弁体12は、上記したボール弁でなくて
も、図６及び図７、詳細には図８に示す様に、円盤状の
ものであっても良い。この場合、スクリーン15における
障壁16は、当然ながら、上記と同様なる条件のもとに形
成している。（図７参照）尚、図６及び図７に示す減圧
弁１は、円盤状の弁体12に弁棒20を一体形成した以外の
構成については、上記と同一のため、上記実施例と同一
又は相当部分には同じ符号を付し、説明は省略する。In the above embodiment, the valve body 12 and the valve stem 20 are separated as shown in FIGS. 1 and 2, and more specifically, as shown in FIG. 4. However, as shown in FIG. It may be integrally formed. Further, the valve body 12 is not limited to the ball valve described above, but may be a disc-shaped one as shown in FIGS. 6 and 7, and more specifically, FIG. In this case, the barrier 16 of the screen 15 is formed under the same conditions as described above. (Refer to FIG. 7) The pressure reducing valve 1 shown in FIGS. 6 and 7 has the same configuration as that described above except that the valve rod 20 is integrally formed with the disc-shaped valve body 12, and thus is the same as the above-described embodiment. Or, the same reference numerals are given to the corresponding parts, and the description is omitted.
【００１０】又、本発明のものは、圧力調整弁として、
減圧弁１を示したが、その他、図９(b) に示す構成の背
圧弁にも当然ながら適用可能である。この場合、１次側
流路７と２次側流路８が上記とは上下逆に平行配置し、
圧力検出孔18は１次側流路７と圧力調整室４を連通し、
弁座11は弁口10の２次側開口部に設けられ、弁座11に着
離自在に弁体12を設けている。[0010] Further, according to the present invention, as a pressure regulating valve,
Although the pressure reducing valve 1 is shown, it is naturally applicable to a back pressure valve having a structure shown in FIG. 9B. In this case, the primary flow path 7 and the secondary flow path 8 are arranged upside down in parallel with the above, and
The pressure detection hole 18 communicates the primary flow path 7 with the pressure adjustment chamber 4,
The valve seat 11 is provided at a secondary opening of the valve port 10, and a valve body 12 is provided on the valve seat 11 so as to be detachable therefrom.
【００１１】次に、減圧弁１の作動について説明する。
調節バネ35を無荷重の状態にすれば、弁体12は弁バネ14
により閉弁し、１次側流路７内が高圧蒸気で満たされる
ことに成る。この状態において、ハンドル29を回転して
調節バネ35を収縮させることにより、ベローズ23を伸長
させ、弁棒20を介して弁体12を押圧する。これにより、
弁体12は弁座11より離脱して、１次側流路７と２次側流
路８が弁口10を介して連通し、蒸気が１次側流路７から
２次側流路８へ流動する。弁体12の開弁時において、蒸
気の流れは、スクリーン15における障壁16により、弁体
12の側方から、弁体12における弁座11の着座側Ｆを直撃
しないので、弁体12は弁座11に対し垂直に移動し、正常
な開度が保持される。又、弁棒20は、環状溝22の形成で
凹凸が軸方向に連続、即ち、図２及び図７に誇張して示
す様に、摺動部20ａと弁棒案内孔19との間に狭い隙間S1
と広い隙間S2が交互に構成されることと成り、その結
果、弁棒20と弁棒案内孔19との隙間Ｓから圧力調整室４
へ侵入しよとする蒸気は、前記の狭い隙間S1と広い隙間
S2を交互に流れる間に、その絞り効果によって次第に圧
力が低下し、弁棒20と弁棒案内孔19からの圧力調整室４
への蒸気の侵入が阻まれる。従って、２次側流路８へ流
動した蒸気は、圧力検出孔18のみを通って圧力調整室４
に流入し、調節ネジ26の弾性力に抗してベローズ23を上
方へ押し上げる。この２次側圧力によるベローズ23への
上向き（閉弁方向）の力と、調節バネ35による下向き
（開弁方向）の力がバランスすることにより、弁体12の
開度が調整され、２次側圧力が一定に保持される。そし
て、減圧弁１の２次側流路８に連結した別途バルブ（図
示せず）を閉弁すると、２次側圧力によるベローズ23へ
の上向きの力が調節バネ35による下向きの力に打ち勝つ
ため、弁体12は弁座11に着座し閉弁する。Next, the operation of the pressure reducing valve 1 will be described.
If the adjusting spring 35 is in a no-load state, the valve body 12
, And the inside of the primary flow path 7 is filled with high-pressure steam. In this state, the bellows 23 is extended by rotating the handle 29 to contract the adjustment spring 35, and the valve body 12 is pressed via the valve rod 20. This allows
The valve element 12 is detached from the valve seat 11, the primary side flow path 7 and the secondary side flow path 8 communicate with each other through the valve port 10, and steam flows from the primary side flow path 7 to the secondary side flow path 8 Flows to When the valve body 12 is opened, the flow of steam is caused by the barrier 16 in the screen 15 due to the valve body.
Since the seat 12 does not directly hit the seating side F of the valve seat 11 in the valve body 12 from the side of the valve body 12, the valve body 12 moves vertically with respect to the valve seat 11, and the normal opening is maintained. In addition, the valve stem 20 is formed with the annular groove 22 so that the unevenness is continuous in the axial direction. That is, as shown in an exaggerated manner in FIGS. 2 and 7, the valve stem 20 is narrow between the sliding portion 20a and the valve stem guide hole 19. Gap S1
And a wide gap S2 are formed alternately, and as a result, the gap S between the valve stem 20 and the
The vapor that is about to enter the narrow gap S1 and the wide gap
During the flow of S2 alternately, the pressure gradually decreases due to the throttle effect, and the pressure regulating chamber 4 from the valve stem 20 and the valve stem guide hole 19 extends.
The intrusion of steam into the air is prevented. Therefore, the steam flowing to the secondary flow path 8 passes through only the pressure detection hole 18 and is
And pushes the bellows 23 upward against the elastic force of the adjusting screw 26. By balancing the upward (valve closing direction) force of the bellows 23 due to the secondary pressure and the downward (valve opening direction) force of the adjusting spring 35, the opening of the valve body 12 is adjusted, and the secondary The side pressure is kept constant. When a separate valve (not shown) connected to the secondary flow path 8 of the pressure reducing valve 1 is closed, the upward force on the bellows 23 due to the secondary pressure overcomes the downward force due to the adjustment spring 35. The valve body 12 sits on the valve seat 11 and closes the valve.
【００１２】[0012]
【発明の効果】要するに本発明は、１次側流路７と２次
側流路８を弁口10を介して連通し、１次側流路７又は２
次側流路８と圧力調節室４とを、これらの隔壁9aに設け
た圧力検出孔18を介して連通し、前記隔壁9aに設けた弁
棒案内孔19に弁棒20を摺動自在に挿通し、該弁棒20で圧
力調節室４に設けた圧力調整手段３と弁口10を開閉する
弁体12とを連繋した圧力調整弁１において、弁棒20にお
ける弁棒案内孔19との摺動部20ａに複数の環状溝22を設
けたので、弁棒案内孔19との摺動面積が減少し、その結
果摺動性を良好にできる。又、上記環状溝22の形成によ
り、摺動部20ａと弁棒案内孔19との間に狭い隙間S1と広
い隙間S2が交互に構成されることで、その絞り効果が発
揮できるため、弁棒20と弁棒案内孔19との隙間Ｓからの
圧力調整室４への蒸気の侵入を防止でき、流量特性を良
好と成すことができる。よって、本発明によれば、隙間
Ｓを従来に比し広くすることができるため、ゴミ噛み等
の発生をも防止できる。又、隙間Ｓを上記の様に広くせ
ずとも、環状溝22の形成により、元々摺動面積を減じて
いるため、当然ながら、ゴミ噛み等の障害の発生率が従
来に比し極めて低く、摺動不良を防止できる。更に、上
記の様に、隙間Ｓが狭くても広くても、上記の効果を奏
するため、隙間Ｓを高精度にする必要がなく、弁棒20の
加工費を低減できるので、弁棒20と弁体12の分離型より
も加工技術及び高精度が要求される一体化型のもので
も、製品価格の低減を実現できる。According to the present invention, the primary side flow path 7 and the secondary side flow path 8 communicate with each other through the valve port 10 so that the primary side flow path 7 or 2
The secondary flow path 8 and the pressure control chamber 4 communicate with each other through a pressure detection hole 18 provided in the partition 9a, and the valve stem 20 is slidably inserted into a valve stem guide hole 19 provided in the partition 9a. In the pressure regulating valve 1 in which the pressure regulating means 3 provided in the pressure regulating chamber 4 is connected with the valve rod 12 for opening and closing the valve port 10 by the valve rod 20, the pressure regulating valve 1 communicates with the valve rod guide hole 19 in the valve rod 20. Since the plurality of annular grooves 22 are provided in the sliding portion 20a, the sliding area with the valve rod guide hole 19 is reduced, and as a result, the slidability can be improved. Further, by forming the annular groove 22, the narrow gap S1 and the wide gap S2 are alternately formed between the sliding portion 20a and the valve stem guide hole 19, so that the throttle effect can be exhibited. Steam can be prevented from entering the pressure adjusting chamber 4 from the gap S between the valve stem guide hole 19 and the valve stem guide hole 19, and good flow characteristics can be achieved. Therefore, according to the present invention, since the gap S can be made wider than before, it is possible to prevent the occurrence of dust and the like. Even if the gap S is not widened as described above, the sliding area is originally reduced by the formation of the annular groove 22, so that the occurrence rate of obstacles such as dust biting is naturally extremely low as compared with the related art. Sliding defects can be prevented. Further, as described above, even if the gap S is narrow or wide, the above-described effect is exhibited. Therefore, it is not necessary to make the gap S highly accurate, and the processing cost of the valve stem 20 can be reduced. The product price can be reduced even with an integrated type requiring more processing technology and higher precision than the separated type of the valve body 12.
【００１３】又、弁棒20の摺動部20ａをメッキ処理し、
弁棒案内孔19に対する弁棒20の摩擦抵抗を減少させたの
で、より一層弁棒20の摺動抵抗を減らすことができる等
その実用的効果甚だ大である。The sliding portion 20a of the valve stem 20 is plated.
Since the frictional resistance of the valve stem 20 with respect to the valve stem guide hole 19 has been reduced, the sliding effect of the valve stem 20 can be further reduced.
【図面の簡単な説明】[Brief description of the drawings]
【図１】減圧弁の断面図である。FIG. 1 is a sectional view of a pressure reducing valve.
【図２】図１の要部拡大断面図である。FIG. 2 is an enlarged sectional view of a main part of FIG.
【図３】スクリーンの斜視図である。FIG. 3 is a perspective view of a screen.
【図４】弁体と弁棒の斜視図である。FIG. 4 is a perspective view of a valve body and a valve stem.
【図５】弁体と弁棒が一体化された状態の斜視図であ
る。FIG. 5 is a perspective view of a state where the valve body and the valve stem are integrated.
【図６】減圧弁の変形例を示す断面図である。FIG. 6 is a sectional view showing a modified example of the pressure reducing valve.
【図７】図６の要部拡大断面図である。FIG. 7 is an enlarged sectional view of a main part of FIG. 6;
【図８】図６の減圧弁に使用した一体化された弁棒と弁
体の斜視図である。FIG. 8 is a perspective view of an integrated valve stem and valve body used in the pressure reducing valve of FIG. 6;
【図９】従来の減圧弁及び背圧弁の構成を示す簡略図で
ある。FIG. 9 is a simplified diagram showing a configuration of a conventional pressure reducing valve and a back pressure valve.
１ 圧力調整弁 ３ 圧力調整手段 ４ 圧力調節室 ７ １次側流路 ８ ２次側流路 9a 隔壁 10 弁口 12 弁体 18 圧力検出孔 19 弁棒案内孔 20 弁棒 20ａ 摺動部 22 環状溝 S1 狭い隙間 S2 広い隙間 DESCRIPTION OF SYMBOLS 1 Pressure regulating valve 3 Pressure regulating means 4 Pressure regulating chamber 7 Primary flow path 8 Secondary flow path 9a Partition wall 10 Valve port 12 Valve element 18 Pressure detection hole 19 Valve rod guide hole 20 Valve rod 20a Sliding part 22 Ring Groove S1 Narrow gap S2 Wide gap
───────────────────────────────────────────────────── フロントページの続き (72)発明者 村田政貴 愛知県小牧市大字入鹿出新田字宮前955ー ５ 株式会社ヨシタケ小牧工場内 Ｆターム(参考） 3H059 AA08 BB06 BB24 BB36 CF14 EE13 FF06 3H060 AA03 CC23 CC35 DC05 DD04 DD12 DD17 GG00 HH08 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Masataka Murata 955--5, Miyamae, Irika-de-Nitta, Komaki-shi, Aichi Prefecture F-term in the Yoshitake Komaki Plant (reference) 3H059 AA08 BB06 BB24 BB36 CF14 EE13 FF06 3H060 AA03 CC23 CC35 DC05 DD04 DD12 DD17 GG00 HH08
Claims (2)
連通し、１次側流路又は２次側流路と圧力調節室とを、
これらの隔壁に設けた圧力検出孔を介して連通し、前記
隔壁に設けた弁棒案内孔に弁棒を摺動自在に挿通し、該
弁棒で圧力調節室に設けた圧力調整手段と弁口を開閉す
る弁体とを連繋した圧力調整弁において、弁棒における
弁棒案内孔との摺動部に複数の環状溝を設け、弁棒案内
孔との間に狭い隙間と広い隙間を交互に構成したことを
特徴とする圧力調整弁。1. A primary side flow path and a secondary side flow path communicate with each other via a valve port, and the primary side flow path or the secondary side flow path and the pressure control chamber are connected to each other.
The valve is slidably inserted into a valve rod guide hole provided in the partition wall through a pressure detection hole provided in the partition wall, and a pressure adjusting means and a valve provided in the pressure control chamber by the valve rod. In a pressure regulating valve connected to a valve body that opens and closes a port, a plurality of annular grooves are provided in a sliding portion of a valve stem with a valve stem guide hole, and a narrow gap and a wide gap are alternately provided between the valve stem and the valve stem guide hole. A pressure regulating valve characterized in that:
徴とする請求項１記載のバルブ。2. The valve according to claim 1, wherein the sliding portion of the valve stem is plated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11196852A JP2001027344A (en) | 1999-07-12 | 1999-07-12 | Pressure regulating valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11196852A JP2001027344A (en) | 1999-07-12 | 1999-07-12 | Pressure regulating valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2001027344A true JP2001027344A (en) | 2001-01-30 |
Family
ID=16364740
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11196852A Pending JP2001027344A (en) | 1999-07-12 | 1999-07-12 | Pressure regulating valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2001027344A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010242903A (en) * | 2009-04-08 | 2010-10-28 | Nok Corp | Pressure relief valve |
| JP2022067558A (en) * | 2020-10-20 | 2022-05-06 | 株式会社ミヤワキ | Valve device and decompression valve using the same |
| CN116221468A (en) * | 2023-03-09 | 2023-06-06 | 浙江三方控制阀股份有限公司 | Self-operated multistage rotary pressure reducing valve |
| CN117780940A (en) * | 2024-02-26 | 2024-03-29 | 江苏乐科节能科技股份有限公司 | Pressure regulating valve capable of regulating back pressure |
-
1999
- 1999-07-12 JP JP11196852A patent/JP2001027344A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010242903A (en) * | 2009-04-08 | 2010-10-28 | Nok Corp | Pressure relief valve |
| JP2022067558A (en) * | 2020-10-20 | 2022-05-06 | 株式会社ミヤワキ | Valve device and decompression valve using the same |
| JP7260918B2 (en) | 2020-10-20 | 2023-04-19 | 株式会社ミヤワキ | Valve device and pressure reducing valve using the same |
| CN116221468A (en) * | 2023-03-09 | 2023-06-06 | 浙江三方控制阀股份有限公司 | Self-operated multistage rotary pressure reducing valve |
| CN117780940A (en) * | 2024-02-26 | 2024-03-29 | 江苏乐科节能科技股份有限公司 | Pressure regulating valve capable of regulating back pressure |
| CN117780940B (en) * | 2024-02-26 | 2024-05-10 | 江苏乐科节能科技股份有限公司 | Pressure regulating valve capable of regulating back pressure |
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