JPS58109777A - Stop valve of pipe axial-flow system - Google Patents

Abstract

PURPOSE:To reduce the thrust required for a valve rod and contrive to make small in size an opening and closing mechanism for a valve, by equalizing the pressures of a fulid which are exerted respectively to equal areas of front and rear surfaces of a valve body. CONSTITUTION:The valve rod 8a screwed into a bevel gear is moved in the axial direction of the pipe, and the valve is opened or closed between a valve seat part 7s of the valve body provided at the tip of the valve rod 8a and a valve seat part 6s of an inner cylinder. A bypass pipe for communicating a chamber A and a chamber C to each other is provided, and the force required for operating a handle connected to the bevel gear can be largely reduced by equalizing the pressure inside the chamber C to an average pressure on a valve body surface in the chamber A by operaing a small-type valve 16.

Description

【発明の詳細な説明】 ストップ弁の弁締切刃はシートの当り円周内面積に働く
流体圧力とシート面締切刃の和に相当する弁棒力を必要
とするために、仕切弁に比較するとハンドルトルクが極
めて大きく、文法れの抵抗値も亦他型式弁に比して最大
である欠陥力ｉある。[Detailed Description of the Invention] The valve closing blade of a stop valve requires a valve stem force equivalent to the sum of the fluid pressure acting on the inner circumferential area of the seat and the closing blade on the seat surface, so compared to a gate valve. The handle torque is extremely large, and the resistance value is also the highest compared to other types of valves.

一方仕切弁に比較してスト、プ弁は、弁座面が前者の２
対に対して１対であるから低原価であることとストップ
弁は流量調節弁として使用できる長所がある。On the other hand, compared to a gate valve, a stop valve has a valve seat surface that is
Since there is only one pair of stop valves, the cost is low, and the stop valve has the advantage of being usable as a flow control valve.

そこでスト、プ弁の固有の長所を失うことなく上記欠陥
を改善して、同一口径、同一呼び圧力において仕切弁よ
り軽量小型で低原価のスト、プ弁を得ることを目的とす
る。Therefore, the object of the present invention is to improve the above-mentioned defects without losing the inherent advantages of the stop valve, and to obtain a stop valve that is lighter, smaller, and lower in cost than a gate valve with the same diameter and the same nominal pressure.

〔問題点解決の手段〕[Means of problem solving]

管軸流方式による小型スト、プ弁は、在来弁に比較して
小型軽量低原価の３面において目的を連成した。しかし
ながらバルブの呼び径及び呼び圧力が大となるに従って
バルブトリム（弁体弁座弁棒、ギヤ廻り）の摺動面に受
ける単位圧力が大となり、呼び圧力が６５短　　級以上
で、耐熱度が４５０℃というような高圧高温弁となると
弁内トリム間の焼着が問題となる。これを解決する手段
は管軸流方式のストップ弁によりて、弁の開閉時に弁体
の前後面の同一面積に！Ｉる流体の押力を等しくした状
態にすれば弁棒に必要な推力は極度に軽減されるから、
例へ４５０℃の高温でも現在の市販材料で焼着の生じな
いバルブができる点に着目した。The small stop valve using the tube axial flow system achieves three objectives: smaller size, lighter weight, and lower cost than conventional valves. However, as the nominal diameter and nominal pressure of the valve increase, the unit pressure applied to the sliding surface of the valve trim (valve body, valve seat, valve stem, gear area) increases. When it comes to high-pressure, high-temperature valves such as 450° C., burning between trims inside the valve becomes a problem. The solution to this problem is to use a tube axial flow type stop valve, so that the front and rear surfaces of the valve body have the same area when the valve is opened and closed! By making the pushing forces of the fluids equal to each other, the thrust required for the valve stem will be extremely reduced.
For example, we focused on the fact that a valve that does not seize can be made using currently commercially available materials even at high temperatures of 450°C.

〔構造〕〔structure〕

第１図は管軸流圧カバランス方式弁の縦断面図の１実施
例を示し、第２図はＡ−Ａ部の横断面図を示す。管内流
体の流れの制御を司る弁座筒（６）が弁箱の入口フラン
ジ（４）の内＠に、軸方向に着脱が可能で、漏洩防止ガ
スケットを介して遊合せられている管軸流方式のスト、
プ弁構造において、入口７ランジ（４）と出口フランジ
（３）との中間は胴管部とレデューサ形部の外管胴（１
）で連結され、その外管内部に弁体嵌合口側で開口し、
その反対＠は袋状に塞がれた円筒（２）が数個の放射状
連結板（ｌ１ｍ）〜ノ （１１→　によって外管胴（１）内に同心に接合され、
流体の流れは入口から外管と円筒間、次に出口に到る直
進路を流れる。（ｌ１ｍ）　（ｌｉｅ）は中間部が膨れ
て、その内部にベベルピニオン軸が通る孔と、バイパス
短管（９）が内筒及び外管胴を貫通した孔があって、ベ
ベルピニオン軸は外管貫通箇所に、適当な回転軸シール
構造を経てハンドルに連結されていて、回転がベベルギ
ヤーに伝達され、ベベルギヤにネジ込まれている弁棒（
８＆）が管軸方向に動かされ、弁棒尖端の弁体弁座部（
７Ｂ）と内筒弁座部（６８）間で弁が開閉される。弁棒
ネジ部には軸方向ＩＣ１本の角溝があって、それに嵌っ
ている角頭の弁棒回り止め役と円筒Ｃ室からバイパス管
（至）に流路が通ずる２役を行う短管（９）が内筒内か
ら外管胴外に貫通しており、バイパス管に）及び小型弁
（ロ）の開閉によって、Ｃ室内圧力をＡ室内の弁体面に
作用する平均圧力に等しくすることによって、ベベルギ
ヤ連結のハンドルの開閉力を大巾に軽くする機構である
。FIG. 1 shows an embodiment of a longitudinal cross-sectional view of a tubular axial flow pressure coverage type valve, and FIG. 2 shows a cross-sectional view of a section A-A. The valve seat cylinder (6), which controls the flow of fluid in the pipe, is removable in the axial direction inside the inlet flange (4) of the valve box, and is loosely fitted through a leak-preventing gasket. method strike,
In the valve structure, the intermediate part between the inlet 7 flange (4) and the outlet flange (3) is the outer pipe body (1) of the body pipe part and the reducer shape part.
), with an opening inside the outer tube on the valve body fitting port side,
On the other hand, a cylinder (2) closed like a bag is joined concentrically within the outer tube body (1) by several radial connecting plates (11m) to (11→),
The fluid flows in a straight path from the inlet, between the outer tube and the cylinder, and then to the outlet. (l1m) (lie) has a swollen middle part, inside which there is a hole through which the bevel pinion shaft passes, and a hole through which the short bypass pipe (9) passes through the inner cylinder and outer pipe body, and the bevel pinion shaft is outside. At the pipe penetration point, the valve stem (which is connected to the handle through an appropriate rotary shaft seal structure, whose rotation is transmitted to the bevel gear, and which is screwed into the bevel gear)
8&) is moved in the tube axis direction, and the valve body valve seat portion (
7B) and the inner cylinder valve seat (68). There is a square groove in the axial direction of the valve stem threaded part, and a short pipe that is fitted into the square groove plays the dual role of preventing rotation of the square-headed valve stem and passing the flow path from the cylindrical C chamber to the bypass pipe (toward). (9) penetrates from the inside of the inner cylinder to the outside of the outer tube body, and by opening and closing the bypass pipe) and the small valve (b), the pressure in the C chamber is made equal to the average pressure acting on the valve body surface in the A chamber. This is a mechanism that greatly reduces the opening and closing force of the bevel gear-connected handle.

本発明の構造はＡ室からＢ室へ、又はＢから入方向への
いずれの流れ方向に使用されても同一性能と効果を表け
すことを特長とする０ 〔発明の効果〕 （１）　　在来のストップ弁より大巾に流体抵抗係数が
小値となり、仕切弁の係数に次ぐ性能を示す。The structure of the present invention is characterized in that it exhibits the same performance and effect regardless of whether it is used in the flow direction from chamber A to chamber B or from B to the inflow direction. The fluid resistance coefficient is much smaller than previous stop valves, and its performance is second only to that of gate valves.

（２）　　バイパス小型弁（２）を開くと水弁の全閉全
開及び往復間において、弁体の両面に働く圧力による作
動力が殆どバランス状態となり、弁は極めて軽く開閉さ
れ、従って弁の開閉機構が小型化される６（３）　　仁
の弁は管軸流力式構造であるので、弁箱を構成している
のｔｉ２枚の７ランジと外管胴、円筒、回転軸外箱座と
バイパス管取付座のみで在来のストップ弁構造にあるよ
うな蓋部の２枚のフランジが省けるから軽量小型、従っ
て低原価となる。(2) When the small bypass valve (2) is opened, the operating force due to the pressure acting on both sides of the valve body is almost in a balanced state when the water valve is fully opened and reciprocated, and the valve opens and closes very lightly, so the valve opens and closes very easily. The mechanism is downsized 6 (3) Since the valve has a tube-axial hydraulic structure, the valve body consists of two 7-lunges, an outer tube body, a cylinder, and a box seat outside the rotating shaft. Since the two flanges on the lid part of the conventional stop valve structure can be omitted by using only the bypass pipe mounting seat, the valve is lightweight and compact, and therefore the cost is low.

（４）　　前項で記述の様に高圧高温のバルブでも、本
発明の構造によるものけ焼着を起きない。(4) As described in the previous section, the structure of the present invention prevents burnout even in high-pressure and high-temperature valves.

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

ｌｔ図はこの発明の管軸流方式のスト、プ弁の実施（３
）（正流時）出口フランジ （逆流時）入口フランジ （４）（正流時）入口フランジ （逆流時）出口フランジ （５）管フランジ（別名、相フラ／ジ）（６）弁座筒　
　（６Ｓ）弁座シート盛会部（７）弁体　　　（７Ｓ）
弁体シート盛会部（８ａ）弁棒ネジ部　　　（８ｂ）弁
棒頭部（９）角頭回り止メ管（兼バイパス管）αＱグラ
ンドパツキン（又はピストンリング）（ｌ１ｍ）連結板
（中央にベベルピニオン軸が貫通）（ｌｉｅ）連結板（
中央に回り止メ兼バイパス短管貫通）（２）スラスト受
リング　（２）ベベルビニオン０４ベベルギヤ　　　　
（ト）回転軸外箱（ハリフト（ｄａ）弁座当り平均直径 （ｄｇ）円筒ガイド内径　υ面間距離（ＪＩＳ弁と同寸
法）The lt diagram shows the implementation of the stop valve of the pipe axial flow system of this invention (3).
) (For forward flow) Outlet flange (For reverse flow) Inlet flange (4) (For forward flow) Inlet flange (For reverse flow) Outlet flange (5) Pipe flange (also known as companion flange) (6) Valve seat tube
(6S) Valve seat seat part (7) Valve body (7S)
Valve body seat assembly part (8a) Valve stem threaded part (8b) Valve stem head (9) Square head detent pipe (also bypass pipe) αQ gland packing (or piston ring) (l1m) Connection plate (beveled in the center) pinion shaft passes through) (lie) connecting plate (
(2) Thrust bearing ring (2) Bevel pinion 04 bevel gear
(g) Rotating shaft outer box (ha lift (da) average diameter per valve seat (dg) cylindrical guide inner diameter υ distance between surfaces (same dimensions as JIS valve)

Claims (1)

【特許請求の範囲】 管内流体の流れの制御を司る弁座筒（６）が弁箱の入ロ
フラ／ジ（４）の内側に、軸方向に着脱が可能で、漏洩
防止ガスケットを介して遊合せられて―る。 入ロアう／ジと出口フランジ（３）の中間は胴管部とレ
デューサ−形部の外管胴（１）で連結される。外管胴内
部に弁体が嵌合されている口側で開口し、反対側は袋状
に塞がれた内筒（２）がその外周において数個の放射方
向の連結板（ｌｌａ）（ｌｆｔ）等によって外管胴に接
合し、流体の流れは入口から外管胴と円筒間を出口に向
って直進的に流れる。弁座筒の内ａに弁体（７）が管軸
方向に介在し、（６ｅ）　（７ｇ）の両り−ト当り平均
直径ｄ、を内筒（２）のガイド筒内径ｄｇＫ等しくした
構造。 弁体の後方外周はパツキン又はピスト／す／グ（転）を
抱き、内部に弁棒（８）を組合はされたパルプトリムが
内筒（２）内に嵌合し、弁棒がネジ込まれたベベルギヤ
（６）の歯面背部の円憤部が（２）袋状孔部口に支へら
れ、（２）内のＣ室は密閉室と１にっている構造。 外管胴外面から円筒内に貫通した２本の孔の内１本は外
管胴外よりベペルビニオノによって円筒内のベベルギヤ
に回転力を伝へ、ノ・７ドルにより弁の開閉を行う。他
の１本の孔は角頭を有する短管（９）が挿入され、短管
の角頭部は弁棒ネジ部に切削された角溝に嵌まり、弁棒
の回転止め役をすると共に、Ｔ状路孔よりＧ室内流体を
パイ、Ｓス管路０呻（ロ）及びバイパス小型弁（ロ）を
経て弁座筒（６）内Ａ室に接続し、６時弁を開くとＣ室
圧はＡ室圧に等しくなり、弁体の両面に働く力をパラ／
スして弁を極めて軽く開閉する構造。 上記の構成からなる管軸流方式の＼トップ弁。[Scope of Claims] A valve seat cylinder (6) that controls the flow of fluid in the pipe is removable in the axial direction inside the valve body's inlet valve/ji (4), and is loosely attached via a leakage prevention gasket. It's combined. An intermediate portion between the lower inlet pipe and the outlet flange (3) is connected by the outer pipe body (1) of the body pipe part and the reducer-shaped part. The inner tube (2) is open on the mouth side where the valve body is fitted inside the outer tube body, and the other side is closed like a bag, and has several radial connecting plates (lla) ( lft) or the like, and the fluid flows straight from the inlet between the outer tube body and the cylinder toward the outlet. A structure in which a valve body (7) is interposed in the inner a of the valve seat cylinder in the tube axis direction, and the average diameter d per seat of both (6e) and (7g) is equal to the inner diameter dgK of the guide cylinder of the inner cylinder (2). . The rear outer periphery of the valve body holds a packing or a piston, and a pulp trim with a valve stem (8) fitted inside fits into the inner cylinder (2), and the valve stem is screwed into the pulp trim. The rounded part on the back of the tooth surface of the bevel gear (6) is supported by the mouth of the bag-shaped hole (2), and the C chamber in (2) is connected to the sealed chamber 1. One of the two holes penetrating into the cylinder from the outer surface of the outer tube body transmits rotational force from the outside of the outer tube body to a bevel gear inside the cylinder by a bevel pinion, and opens and closes a valve with a no. A short pipe (9) with a square head is inserted into the other hole, and the square head of the short pipe fits into a square groove cut into the threaded part of the valve stem, and serves to stop the valve stem from rotating. , connect the fluid in the G chamber from the T-shaped passage hole to the chamber A in the valve seat cylinder (6) via the pipe, S pipe 0 (b) and the small bypass valve (b), and when the 6 o'clock valve is opened, the C The chamber pressure becomes equal to the A chamber pressure, and the force acting on both sides of the valve body is
A structure that allows the valve to open and close extremely easily. A pipe axial flow type top valve consisting of the above configuration.