JPH01242878A - Shut off-sealing structure of valve - Google Patents
Shut off-sealing structure of valveInfo
- Publication number
- JPH01242878A JPH01242878A JP7157688A JP7157688A JPH01242878A JP H01242878 A JPH01242878 A JP H01242878A JP 7157688 A JP7157688 A JP 7157688A JP 7157688 A JP7157688 A JP 7157688A JP H01242878 A JPH01242878 A JP H01242878A
- Authority
- JP
- Japan
- Prior art keywords
- valve
- valve body
- valve chamber
- seal portion
- seal
- 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
Links
- 238000007789 sealing Methods 0.000 title abstract description 14
- 239000012530 fluid Substances 0.000 claims description 22
- 230000000149 penetrating effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
- 239000003566 sealing material Substances 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004043 responsiveness Effects 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Sliding Valves (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は農水産設備、水処理設備、建築設備、プラント
設備、上水道等の管路に用いられて好適な弁の締切シー
ル構造に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a shutoff seal structure for a valve suitable for use in pipelines for agricultural and fishery equipment, water treatment equipment, building equipment, plant equipment, waterworks, and the like.
［従来の技術］
従来の弁として、流体流路と弁室を備える弁箱と、弁箱
の外部から弁室内に貫通する弁棒と、弁棒の弁室内に位
置する部分に結合され、弁箱の流体流路に連通ずる弁室
内面に密着する弁室シール部、および弁箱の流体流路内
面に密着する弁座シール部を備える弁体と、弁棒の弁室
外に位置する部分に固定され、弁棒を介して弁体を駆動
し、弁体の弁室シール部と弁座シール部を対応する弁室
内面と流体流路内面に対して接離する操作部材を有して
なるものが用いられている。[Prior Art] A conventional valve includes a valve body including a fluid flow path and a valve chamber, a valve stem that penetrates into the valve chamber from outside the valve body, and a valve stem that is coupled to a portion of the valve stem that is located inside the valve chamber. A valve body includes a valve chamber seal portion that is in close contact with the inner surface of the valve chamber that communicates with the fluid flow path of the box, and a valve seat seal portion that is in close contact with the inner surface of the fluid flow path of the valve box, and a portion of the valve stem that is located outside the valve chamber. The operating member is fixed and drives the valve body via the valve stem, and moves the valve chamber seal portion and the valve seat seal portion of the valve body toward and away from the corresponding inner surface of the valve chamber and the inner surface of the fluid flow path. something is being used.
上記弁にあっては、弁締切時に、弁体の弁室シール部を
弁室内面に密着させるとともに、弁座シール部を流体波
路内面に密着させ、流体流路を完全に遮断することとし
ている。In the above valve, when the valve is closed, the valve chamber seal portion of the valve body is brought into close contact with the inner surface of the valve chamber, and the valve seat seal portion is brought into close contact with the inner surface of the fluid wave path, thereby completely blocking the fluid flow path. .
［発明が解決しようとする課題］
第７図は弁の弁室締切部を示す模式図であり、１は弁箱
、２は弁体、３は弁室内面、４は弁室シール部である。[Problems to be Solved by the Invention] FIG. 7 is a schematic diagram showing a valve chamber closing portion of a valve, in which 1 is a valve box, 2 is a valve body, 3 is an inner surface of the valve chamber, and 4 is a valve chamber seal portion. .
しかして、弁締切時、弁体２の上澄側と下流側の間にＰ
なる高差圧が発生すると、このＰにより、弁体２の軸心
が下流側に文１だけ移動する。Therefore, when the valve is closed, there is a P between the supernatant side and the downstream side of the valve body 2.
When such a high differential pressure is generated, this P causes the axis of the valve body 2 to move downstream by a distance of 1.
これにより、弁室内面３と弁室シール部４の間に交２の
隙間を生じ、上記Ｐが弁室内に作用することとなる。こ
の状態で、弁体２を開き動作させようとして、弁室シー
ル部４および不図示の弁座シール部がタヤ性変形する程
度、弁体２を開き側に移動しても、弁室内の高い圧力が
抜けず、かえって弁室内の圧力は弁体２の上記微小移動
相当分だけさらに昇圧し、弁体２の移動を妨げる。した
がって、操作部材の操作トルクが大きく、操作性が悪い
という結果となる。As a result, a gap of 2 is created between the valve chamber inner surface 3 and the valve chamber seal portion 4, and the above-mentioned P acts inside the valve chamber. In this state, when an attempt is made to open the valve body 2, the valve chamber seal portion 4 and the valve seat seal portion (not shown) are deformed to the extent that the valve chamber seal portion 4 and the valve seat seal portion (not shown) are deformed. The pressure does not release, and on the contrary, the pressure within the valve chamber increases by an amount corresponding to the minute movement of the valve body 2, which prevents the valve body 2 from moving. Therefore, the operating torque of the operating member is large, resulting in poor operability.
なお従来、実開昭６ｔｌ−１７３８８９号公報に記載の
如く、弁座シール部において弁体の最下端部に位置する
部分に、該弁体の弁室を臨む部位にまで貫通する貫通孔
を設け、この貫通孔により、弁開閉時における弁室の内
圧調整を行なうものが提案されている。Conventionally, as described in Japanese Utility Model Application Publication No. Sho 6TL-173889, a through hole has been provided in a portion of the valve seat seal portion located at the lowest end of the valve body that extends to a portion of the valve body facing the valve chamber. It has been proposed that the through hole adjusts the internal pressure of the valve chamber when the valve is opened and closed.
しかしながら、弁座シール部は必要なシール性能を得る
ために一定以上の有効シール幅を確保する必要があり、
上記貫通孔の孔径を大きくとるには一定の限界がある。However, the valve seat seal needs to have an effective seal width above a certain level in order to obtain the necessary sealing performance.
There is a certain limit to increasing the diameter of the through hole.
したがって、上記貫通孔により前述の弁室内の圧力Ｐを
迅速かつ確実に解放するには困難がある。Therefore, it is difficult to quickly and reliably release the pressure P in the valve chamber through the through hole.
本発明は、弁締切時のシール性を確保するとともに、弁
締切後における弁体の開き動作を容易化して弁操作性を
向上することを目的とする。An object of the present invention is to ensure sealing performance when the valve is closed, and to facilitate the opening operation of the valve body after the valve is closed, thereby improving valve operability.
［課題を解決するための手段］
本発明は、流体流路と弁室を備える弁箱と、弁箱の外部
から弁室内に貫通する弁棒と、弁棒の弁室内に位置する
部分に結合され、弁箱の流体流路に連通ずる弁室内面に
密着する弁室シール部、および弁箱の波体流路内面に密
着する弁座シール部を備える弁体と、弁棒の弁室外に位
置する部分に固定され、弁棒を介して弁体を駆動し、弁
体の弁室シール部と弁座シール部を対応する弁室内面と
流体流路内面に対して接離する操作部材を有してなる弁
の締切シール構造において、弁体に設けられる弁室シー
ル部および弁座シール部のシール幅内におけるシール延
在方向の複数位置に、該弁体の弁室を臨む部位にまで貫
通する貫通孔を設けるようにしたものである。[Means for Solving the Problems] The present invention provides a valve body including a fluid flow path and a valve chamber, a valve stem that penetrates into the valve chamber from outside the valve body, and a portion of the valve stem that is coupled to a portion located inside the valve chamber. A valve body is provided with a valve chamber seal portion that is in close contact with the inner surface of the valve chamber that communicates with the fluid flow path of the valve body, and a valve seat seal portion that is in close contact with the inner surface of the corrugated body flow path of the valve body, and a valve stem that is located outside the valve chamber. The operating member is fixed to the position of the valve body, drives the valve body via the valve stem, and moves the valve chamber sealing portion and the valve seat sealing portion of the valve body toward and away from the corresponding inner surface of the valve chamber and the inner surface of the fluid flow path. In the closing seal structure of the valve, the valve chamber seal portion and the valve seat seal portion provided on the valve body are provided at multiple positions in the seal extension direction within the seal width, up to a portion of the valve body facing the valve chamber. A through hole is provided therethrough.
［作用］
弁締切後に、弁室シール部および弁座シール部が弾性変
形する程度、弁体を開き側に移動すると、弁室内の圧力
がそれらシール部のシール幅内におけるシール延在方向
の複数位置に設けた貫通孔から流体流路の側に抜けるこ
ととなる。ここで、本発明にあっては、貫通孔が、弁室
シール部と弁座シール部のシール幅内におけるシール延
在方向の複数位置に設けられるから、個々の貫通孔の孔
径はシール幅内に有効シール幅を確保してシール性能を
損なうことのない大きさに設定しつつ、それらの絵札面
積を大きくとることができる。したがって、弁室の内圧
調整のために大きな貫通孔面積を提供できることとなり
、弁室に作用する高差圧Ｐを迅速かつ確実に解放できる
。[Operation] After the valve is closed, when the valve body is moved to the opening side to the extent that the valve chamber seal portion and the valve seat seal portion are elastically deformed, the pressure inside the valve chamber is It exits to the fluid flow path side through the through hole provided at the position. Here, in the present invention, since the through holes are provided at a plurality of positions in the seal extending direction within the seal width of the valve chamber seal portion and the valve seat seal portion, the hole diameter of each through hole is within the seal width. While ensuring an effective seal width and setting the size to a size that does not impair seal performance, it is possible to increase the area of the picture cards. Therefore, a large through hole area can be provided for adjusting the internal pressure of the valve chamber, and the high differential pressure P acting on the valve chamber can be quickly and reliably released.
これにより、シール部による弁締切時のシール性を確保
するとともに、弁体の開き動作時における弁室内昇圧を
回避してその開き動作を容易化し、弁操作性を向上でき
る。Thereby, it is possible to ensure the sealing performance of the seal portion when the valve is closed, and also to avoid pressure increase in the valve chamber when the valve element is opened, thereby facilitating the opening operation and improving valve operability.
［実施例］
第１図は本発明の一実施例を示す断面図、第２図は弁体
な示す半断面図、第３図は第２図のｍ−■線に沿う半断
面図、第４図は弁室シール部を示す断面図、第５図は弁
座シール部を示す断面図、第６図は弁体下端側の弁座シ
ール部を示す断面図である。[Example] Fig. 1 is a sectional view showing an embodiment of the present invention, Fig. 2 is a half sectional view showing a valve body, Fig. 3 is a half sectional view taken along the line m-■ in Fig. 4 is a sectional view showing the valve chamber seal portion, FIG. 5 is a sectional view showing the valve seat seal portion, and FIG. 6 is a sectional view showing the valve seat seal portion on the lower end side of the valve body.
弁１０は、弁箱１１と、弁棒１２と、弁体１３と、キャ
ップ（操作部材）１４とを有している。The valve 10 includes a valve box 11, a valve stem 12, a valve body 13, and a cap (operating member) 14.
弁箱１１は、ハウジング１５と、下ボンネット１６と、
上ボンネット１７と、弁棒受は板１８の４者を不図示の
固定ボルトにて共線めすることにて構成されている。ハ
ウジング１５は、流体流路１５Ａを構成するとともに、
弁室１５Ｂを形成している。ハウジング１５と下ポンネ
ッ）１６の間には０リング１９が介装されている。The valve box 11 includes a housing 15, a lower bonnet 16,
The upper bonnet 17 and the valve stem holder are constructed by aligning the four members of the plate 18 with fixing bolts (not shown). The housing 15 constitutes a fluid flow path 15A, and
A valve chamber 15B is formed. An O-ring 19 is interposed between the housing 15 and the lower ponnet 16.
弁棒１２は、中間フランジ部１２Ａを下ボンネット１６
と弁棒量は板１８の間に保持され、弁箱１１に対し回転
はするが自軸方向には移動しない状態で結合されている
。弁棒１２は、弁箱１１の内部（ハウジング１５の弁室
１５Ｂ）に位置する下端部に弁体用おねじ部１２Ｂを備
えている。The valve stem 12 connects the intermediate flange portion 12A to the lower bonnet 16.
The valve stem and the valve stem are held between the plates 18 and are connected to the valve body 11 in a state where they rotate but do not move in the direction of their own axis. The valve rod 12 includes a male threaded portion 12B for a valve body at a lower end portion located inside the valve box 11 (valve chamber 15B of the housing 15).
弁＃８１２と下ボンネット１６の間にはＯリング２０が
介装される。An O-ring 20 is interposed between the valve #812 and the lower bonnet 16.
弁体１３は、弁棒１２の上記おねじ部１２Ｂに螺着され
るめねじナツト（めねじ部）２１を一体に備える。また
、弁体１３は、ハウジング１５の弁室１５Ｂに臨む内面
における、弁棒軸方向に沿って設けられる案内溝２２に
スライド可能に係合する係合突部２３を備える。これに
より、弁体１３は、弁箱１１に対して弁棒軸方向に移動
はするが回転はしない状態で結合される。すなわち、弁
体１３は弁棒１２の回転時に弁棒軸方向に上下動し、ハ
ウジング１５の流体流路１５Ａを開閉する。The valve body 13 is integrally provided with a female threaded nut (female threaded portion) 21 that is screwed onto the male threaded portion 12B of the valve stem 12. Further, the valve body 13 includes an engagement protrusion 23 that slidably engages with a guide groove 22 provided along the valve stem axial direction on the inner surface of the housing 15 facing the valve chamber 15B. Thereby, the valve body 13 is coupled to the valve body 11 in a state in which it moves in the axial direction of the valve stem but does not rotate. That is, the valve body 13 moves up and down in the axial direction of the valve stem when the valve stem 12 rotates, and opens and closes the fluid passage 15A of the housing 15.
キャップ１４は、弁棒１２の外部に位置する上端部に固
定されてボックススパナが着脱でき、弁棒１２を介して
上述の如く弁体１３を駆動する。The cap 14 is fixed to the upper end of the valve stem 12 located outside, and a box spanner can be attached to and removed from the cap 14 to drive the valve body 13 via the valve stem 12 as described above.
しかして、弁体１３は第１図、第２図において１字状を
なす弁室シール部３１と弁座シール部３２を備えている
。Thus, the valve body 13 includes a valve chamber seal portion 31 and a valve seat seal portion 32, which form a single character shape in FIGS. 1 and 2.
弁室シール部３１は弾性シール材からなり、弁体１３が
上下動するに際して弁室１５Ｂのリング状内面に対して
接離し、弁締切時に弁室１５Ｂの内面に密着する。The valve chamber seal portion 31 is made of an elastic sealing material, and comes into contact with and separates from the ring-shaped inner surface of the valve chamber 15B when the valve body 13 moves up and down, and comes into close contact with the inner surface of the valve chamber 15B when the valve is closed.
弁座シール部３２も弾性シール材からなり、弁体１３が
上下動するに際して流体流路１５ＡのＵ字状内面に対し
て接離し、弁締切時に流体流路１５Ａの内面に密着する
。The valve seat seal portion 32 is also made of an elastic sealing material, and comes into contact with and separates from the U-shaped inner surface of the fluid flow path 15A when the valve body 13 moves up and down, and comes into close contact with the inner surface of the fluid flow path 15A when the valve is closed.
ここで、弁室シール部３１はそのシール幅内に溝幅ａの
凹状をなし、リング状を呈するシール延在方向に連続す
る長溝３３を備え、長溝３３の延在方向の複数位置に溝
幅ａより小なる孔径すの貫通孔３４を備えている０貫通
孔３４は弁体１３の弁室１５Ｂを臨む部位にまで貫通し
ている（第４図参照）。Here, the valve chamber seal portion 31 has a concave shape with a groove width a within its seal width, and is provided with a ring-shaped long groove 33 that is continuous in the seal extending direction. The through hole 34, which has a through hole 34 with a diameter smaller than a, penetrates to a portion of the valve body 13 facing the valve chamber 15B (see FIG. 4).
また、弁座シール部３２もそのシール幅内に溝幅Ｃの凹
状をなし、Ｕ字状を呈するシール延在方向で弁体下端部
（後述する角度θの範囲）を除く範囲内で連続する長溝
３５を備え、長溝３５の延在方向の複数位置に溝＠Ｃよ
り小なる孔径ｄの貫通孔３６を備えている０貫通孔３６
も弁体１３の弁室１５Ｂを臨む部位にまで貫通している
（第５図参照）、上記長溝３５は、弁体軸心Ｏから角度
０＝４５度前後の位置より弁体上端側の範囲に設けられ
、弁座シール部３２の弁体下端側の横断面は第６図の如
くである。The valve seat seal portion 32 also has a concave shape with a groove width C within its seal width, and is continuous within the range excluding the lower end of the valve body (range of angle θ described later) in the extending direction of the U-shaped seal. 0 through hole 36 which is provided with a long groove 35 and provided with through holes 36 having a hole diameter d smaller than the groove @C at a plurality of positions in the extending direction of the long groove 35.
The long groove 35 penetrates to the part of the valve body 13 facing the valve chamber 15B (see FIG. 5). The cross section of the valve seat seal portion 32 on the lower end side of the valve body is as shown in FIG.
なお、弁室シール部３１の長溝３３と弁座シール部３２
の長溝３５とは相互に連通せしめられている。Note that the long groove 33 of the valve chamber seal portion 31 and the valve seat seal portion 32
The long grooves 35 are communicated with each other.
また、弁座シール部３２において弁体１３の最下端部に
位置する部分には、弁室１５Ｂを臨む部位にまで貫通す
る貫通孔３７が設けられている。Further, in the portion of the valve seat seal portion 32 located at the lowest end of the valve body 13, a through hole 37 is provided that penetrates to a portion facing the valve chamber 15B.
次に上記実施例の作用について説明する。Next, the operation of the above embodiment will be explained.
上記実施例において、弁締切後に、弁室シール部３１お
よび弁座シール部３２が弾性変形する程度、弁体１３を
開き側に移動すると、弁室１５Ｂの内部圧力がそれらシ
ール部３１．３２のシール幅内におけるシール延在方向
の複数位置に設けた貫通孔３４．３６．３７から流体流
路１５Ａの側に抜けることとなる。In the above embodiment, when the valve body 13 is moved to the opening side to the extent that the valve chamber seal portion 31 and the valve seat seal portion 32 are elastically deformed after the valve is closed, the internal pressure of the valve chamber 15B is The fluid exits to the fluid flow path 15A side through through holes 34, 36, and 37 provided at multiple positions in the seal extension direction within the seal width.
ここで、上記実施例にあっては、貫通孔３４．３６．３
７が、弁室シール部３１と弁座シール部３２のシール幅
内におけるシール延在方向の複数位置に設けられるから
、個々の貫通孔３４．３６．３７の孔径はシール幅内に
有効シール幅を確保してシール性能を損なうことのない
大きさに設定しつつ、それらの総花面積を大きくとるこ
とができる。したがって、弁室１５Ｂの内圧調整のため
に大きな貫通孔面積を提供できることとなり、弁室１５
Ｂに作用する高差圧Ｐを迅速かつ確実に解放できる。Here, in the above embodiment, the through holes 34.36.3
7 are provided at multiple positions in the seal extending direction within the seal width of the valve chamber seal portion 31 and the valve seat seal portion 32, the hole diameters of the individual through holes 34, 36, and 37 are set within the seal width to form an effective seal width. The total flower area can be increased while ensuring a size that does not impair sealing performance. Therefore, a large through hole area can be provided for adjusting the internal pressure of the valve chamber 15B, and the valve chamber 15
The high differential pressure P acting on B can be released quickly and reliably.
これにより、シール部３１．３２による弁Ｍｌｌ待時シ
ール性を確保するとともに、弁体１３の開き動作時にお
ける弁室内昇圧を回避してその開き動作を容易化し、弁
操作性を向上できる。This ensures the standby sealing performance of the valve Mll by the seal portions 31 and 32, and also avoids pressure increase in the valve chamber during the opening operation of the valve body 13, making the opening operation easier and improving the valve operability.
また、上記実施例にあっては、シール部３１．３２の各
貫通孔３４．３６の全てがシール幅内に設けられた長溝
３３．３５にて相互に連通せしめられているので、弁開
き動作時にシール部３１．３２の一部が流体流路１５Ａ
、弁室１５Ｂの内面から離れると長溝３３．３５を介し
て直ちに全貫通孔３４．３６が上述の圧力調整動作に寄
与することになり、圧力調整の応答性が良い。Further, in the above embodiment, all of the through holes 34, 36 of the seal portion 31, 32 are communicated with each other through the long grooves 33, 35 provided within the seal width, so that the valve opening operation is possible. At times, a part of the seal portion 31, 32 is connected to the fluid flow path 15A.
As soon as it leaves the inner surface of the valve chamber 15B, all the through holes 34.36 immediately contribute to the above-mentioned pressure adjustment operation via the long grooves 33.35, resulting in good pressure adjustment responsiveness.
なお、本発明は、弁の開閉動作時に、弁棒および操作部
材が上下動する方式の弁にも適用できる。Note that the present invention can also be applied to a type of valve in which the valve stem and the operating member move up and down during the opening and closing operations of the valve.
また、本発明の実施において、操作部材はハンドル等で
あってもよい。Further, in implementing the present invention, the operating member may be a handle or the like.
［発明の効果］
以上のように、本発明によれば、弁締切時のシール性を
確保するとともに、弁締切後における弁体の開き動作を
容易化して弁操作性を向上することができる。[Effects of the Invention] As described above, according to the present invention, it is possible to ensure sealing performance when the valve is closed, and to facilitate the opening operation of the valve body after the valve is closed, thereby improving valve operability.
第１図は本発明の一実施例を示す断面図、第２図は弁体
を示す半断面図、第３図は第２図のｍ−ｍｖｉに沿う半
断面図、第４図は弁室シール部を示す断面図、第５図は
弁座シール部を示す断面図、第６図は弁体下端側の弁座
シール部を示す断面図、第７図は弁の弁室締切部を示す
模式図である。
１０・・・弁。
１１・・・弁箱、
１２・・・弁棒、
１３・・・弁体、
１４・・・キャップ（操作部材）、
１５Ａ・・・流体流路、
１５Ｂ・・・弁室、
３１・・・弁室シール部、
３２・・・弁座シール部、
３４．３６・・・貫通孔。
特許出願人 積水化学工業株式会社
代表者 廣１）馨
第１図
第２図 第３図
■
「
第４図 第５図 第６図Fig. 1 is a sectional view showing an embodiment of the present invention, Fig. 2 is a half sectional view showing the valve body, Fig. 3 is a half sectional view taken along the m-mvi line in Fig. 2, and Fig. 4 is a valve chamber. 5 is a sectional view showing the seal portion, FIG. 5 is a sectional view showing the valve seat seal portion, FIG. 6 is a sectional view showing the valve seat seal portion on the lower end side of the valve body, and FIG. 7 is a sectional view showing the valve chamber closing portion of the valve. It is a schematic diagram. 10... Valve. DESCRIPTION OF SYMBOLS 11... Valve box, 12... Valve stem, 13... Valve body, 14... Cap (operation member), 15A... Fluid flow path, 15B... Valve chamber, 31... Valve chamber seal portion, 32...Valve seat seal portion, 34.36...Through hole. Patent applicant: Sekisui Chemical Co., Ltd. Representative Hiroshi 1) KaoruFigure 1Figure 2Figure 3■ Figure 4Figure 5Figure 6
Claims (1)
弁室内に貫通する弁棒と、弁棒の弁室内に位置する部分
に結合され、弁箱の流体流路に連通する弁室内面に密着
する弁室シール部、および弁箱の流体流路内面に密着す
る弁座シール部を備える弁体と、弁棒の弁室外に位置す
る部分に固定され、弁棒を介して弁体を駆動し、弁体の
弁室シール部と弁座シール部を対応する弁室内面と流体
流路内面に対して接離する操作部材を有してなる弁の締
切シール構造において、弁体に設けられる弁室シール部
および弁座シール部のシール幅内におけるシール延在方
向の複数位置に、該弁体の弁室を臨む部位にまで貫通す
る貫通孔を設けたことを特徴とする弁の締切シール構造
。(1) A valve body including a fluid passage and a valve chamber, a valve stem that penetrates into the valve chamber from outside the valve body, and is connected to a portion of the valve stem located inside the valve chamber and communicates with the fluid passage of the valve body. A valve body is provided with a valve chamber seal portion that is in close contact with the inner surface of the valve chamber, and a valve seat seal portion that is in close contact with the inner surface of the fluid flow path of the valve body. A shutoff seal structure for a valve comprising an operation member for driving a valve body and moving a valve chamber seal portion and a valve seat seal portion of the valve body toward and away from the corresponding valve chamber inner surface and fluid flow path inner surface, The valve body is characterized by having through-holes penetrating the valve body facing the valve chamber at a plurality of positions in the seal extending direction within the seal width of the valve chamber seal portion and the valve seat seal portion provided on the valve body. The shutoff seal structure of the valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63071576A JP2543564B2 (en) | 1988-03-24 | 1988-03-24 | Valve closing seal structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63071576A JP2543564B2 (en) | 1988-03-24 | 1988-03-24 | Valve closing seal structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01242878A true JPH01242878A (en) | 1989-09-27 |
| JP2543564B2 JP2543564B2 (en) | 1996-10-16 |
Family
ID=13464664
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63071576A Expired - Lifetime JP2543564B2 (en) | 1988-03-24 | 1988-03-24 | Valve closing seal structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2543564B2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61173869A (en) * | 1985-08-30 | 1986-08-05 | 清水 潔 | Manufacture of power hammer drill |
-
1988
- 1988-03-24 JP JP63071576A patent/JP2543564B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61173869A (en) * | 1985-08-30 | 1986-08-05 | 清水 潔 | Manufacture of power hammer drill |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2543564B2 (en) | 1996-10-16 |
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