JP2018100764A - Method for detaching/attaching valve operating machine and valve device - Google Patents

Method for detaching/attaching valve operating machine and valve device Download PDF

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JP2018100764A
JP2018100764A JP2016248540A JP2016248540A JP2018100764A JP 2018100764 A JP2018100764 A JP 2018100764A JP 2016248540 A JP2016248540 A JP 2016248540A JP 2016248540 A JP2016248540 A JP 2016248540A JP 2018100764 A JP2018100764 A JP 2018100764A
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valve
box
stem
valve stem
valve operating
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JP6715178B2 (en
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佑 中平
Yu Nakahira
佑 中平
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Kubota Corp
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Kubota Corp
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Abstract

PROBLEM TO BE SOLVED: To provide a method for detaching/attaching a valve operating machine and a valve device which can easily detach/attach the valve operating machine of an existing valve device in a water-conductive state without requiring a special configuration.SOLUTION: A valve device includes a valve body provided rotatably about a shaft of a valve rod 12 inserted into a valve box 11, in which a valve operating machine 20 that rotatably drives the valve rod 12 is mounted on the valve rod 12. Fastening between the valve operating machine 20 and the valve box 11 is released, and the valve operating machine 20 is spaced apart from the valve box 11 by a gap L for maintenance while maintaining an engagement between the valve operating machine 20 and the valve rod 12. A processing tool 40 is inserted into the gap L for maintenance to form an engaging part 51 on the valve rod 12, and the valve operating machine 20 is detached/attached in a state where an engaging member 52 for preventing rotation of the valve rod 12 is mounted on the engaging part 51.SELECTED DRAWING: Figure 1

Description

本発明は、バルブ操作機の脱着方法およびバルブ装置に関し、通水状態で弁棒を廻り止めする技術に係るものである。   The present invention relates to a method for attaching and detaching a valve operating device and a valve device, and relates to a technique for preventing a valve rod from rotating in a water passage state.

従来、例えば特許文献１に記載するものは、既設弁の補修方法に関し、軸封部からの漏水が発生した場合に通水状態で補修して漏水を止めるものである。この方法は、操作機を弁棒の先端部から取り外して弁棒の先端部を露出させ、弁棒の先端部に補修用止水部材を外嵌し、操作機を弁棒先端部に取付けて、軸封部を通過する漏水を補修用止水部材で止水するものである。   Conventionally, for example, what is described in Patent Document 1 relates to a method for repairing an existing valve, in which water leakage is repaired and water leakage is stopped when water leakage occurs from a shaft seal portion. This method involves removing the operating device from the tip of the valve stem, exposing the tip of the valve stem, externally fitting a water stop member for repair to the tip of the valve stem, and attaching the operating device to the tip of the valve stem. The water leakage that passes through the shaft seal is stopped by a repair water-stopping member.

特開２０１６−８４８２５JP2016-84825A

上記方法は、以下の構成を前提としている。すなわち、弁棒の上部に直径方向に貫通する貫通孔を形成し、弁箱のフランジ部と操作機のフランジ部との間に、弁棒を軸心廻りで回動不能に固定する固定部材を設けている。固定部材には直径方向に固定孔を形成し、固定孔と貫通孔とが直線上にある状態で固定用棒を挿通して廻り止めする。   The above method is based on the following configuration. That is, a through-hole penetrating in the diametrical direction is formed in the upper part of the valve stem, and a fixing member for fixing the valve stem non-rotatably around the shaft center between the flange portion of the valve box and the flange portion of the operating device. Provided. A fixing hole is formed in the fixing member in the diameter direction, and the fixing rod is inserted and stopped while the fixing hole and the through hole are in a straight line.

この方法は固定部材を弁箱のフランジ部と操作機のフランジ部との間に介装する必要があり、予め固定部材が装着されていないバルブ装置では実施が困難である。   This method requires the fixing member to be interposed between the flange portion of the valve box and the flange portion of the operating device, and is difficult to implement in a valve device in which the fixing member is not mounted in advance.

本発明は上記した課題を解決するものであり、通水状態にある既設のバルブ装置のバルブ操作機を特別な構成を必要とせずに容易に脱着することができるバルブ操作機の脱着方法およびバルブ装置を提供することを目的とする。   The present invention solves the above-described problems, and a valve operating machine attaching / detaching method and valve capable of easily attaching / detaching a valve operating machine of an existing valve device in a water-flowing state without requiring a special configuration. An object is to provide an apparatus.

上記課題を解決するために、本発明のバルブ操作機の脱着方法は、弁箱内に挿通した弁棒の軸心廻りに回動する弁体を有し、弁棒を回転駆動するバルブ操作機を弁棒に装着したバルブ装置において、バルブ操作機と弁箱の締結を解除し、バルブ操作機と弁棒との係合状態を維持しつつバルブ操作機を弁箱からメンテナンス用隙間だけ離間させ、メンテナンス用隙間を通して加工具で弁棒に係合部を形成し、弁棒の廻り止め用の係止材を係合部に装着する状態でバルブ操作機を脱着させることを特徴とする。   In order to solve the above problems, a valve operating device detaching method according to the present invention includes a valve body that rotates about a shaft center of a valve rod inserted through a valve box, and that rotates the valve rod. In the valve device mounted on the valve stem, the fastening of the valve operating device and the valve rod is released, and the valve operating device is separated from the valve housing by a maintenance clearance while maintaining the engaged state between the valve operating device and the valve stem. The engagement portion is formed on the valve stem with the processing tool through the maintenance gap, and the valve operating machine is detached while the locking member for stopping the rotation of the valve rod is attached to the engagement portion.

本発明のバルブ操作機の脱着方法において、バルブ操作機は、弁箱の弁箱フランジに設けた締結ボルトの軸心方向に沿って弁箱から離間し、係止材は一端側が弁棒の係合部に弁棒の軸心廻りで回動不能に係合し、他端側が締結ボルトにより弁棒の軸心廻りで係止されることを特徴とする。   In the method for attaching and detaching the valve operating device according to the present invention, the valve operating device is separated from the valve box along the axial direction of the fastening bolt provided on the valve box flange of the valve box, and the locking member is engaged with the valve rod at one end side. It is characterized in that it is engaged with the joint portion so as not to rotate around the axis of the valve stem, and the other end is locked around the axis of the valve stem by a fastening bolt.

本発明のバルブ装置は、弁箱内に挿通した弁棒の軸心廻りに回動する弁体を有し、弁棒を回転駆動するバルブ操作機を弁体に装着したバルブ装置において、弁箱は、弁箱フランジにバルブ操作機と弁箱とを結合離間可能に締結する締結ボルトを有し、弁棒は、弁棒の廻り止め用の係止材と係合する係合部を形成するためのマーキング部を有し、マーキング部は、バルブ操作機と弁棒との係合状態を維持しつつバルブ操作機を弁箱から締結ボルトの軸心方向に沿ってメンテナンス用隙間だけ離間させた状態において、メンテナンス用隙間において露出することを特徴とする。   A valve device according to the present invention includes a valve body that rotates about the axis of a valve rod inserted into the valve box, and a valve operating device that rotates the valve rod is mounted on the valve body. Has a fastening bolt for fastening the valve operating unit and the valve box to the valve box flange so as to be able to be separated from each other, and the valve rod forms an engaging portion that engages with a locking member for preventing rotation of the valve rod. The marking portion is spaced from the valve box by the maintenance clearance along the axial direction of the fastening bolt while maintaining the engagement state between the valve operating device and the valve stem. In the state, it is exposed in the maintenance gap.

本発明のバルブ装置は、弁箱内に挿通した弁棒の軸心廻りに回動する弁体を有し、弁棒を回転駆動するバルブ操作機を弁体に装着したバルブ装置において、弁箱は、弁箱フランジにバルブ操作機と弁箱とを結合離間可能に締結する締結ボルトを有し、弁棒は、弁棒の廻り止め用の係止材と係合する係合部を有し、係合部は、バルブ操作機と弁棒との係合状態を維持しつつバルブ操作機を弁箱から締結ボルトの軸心方向に沿ってメンテナンス用隙間だけ離間させた状態において、メンテナンス用隙間に挿通した係止材と係合することを特徴とする。   A valve device according to the present invention includes a valve body that rotates about the axis of a valve rod inserted into the valve box, and a valve operating device that rotates the valve rod is mounted on the valve body. Has a fastening bolt for fastening the valve operating unit and the valve box to the valve box flange so as to be able to be separated from each other, and the valve rod has an engaging portion that engages with a locking member for preventing rotation of the valve rod. The engagement portion is a maintenance clearance in a state where the valve operation device is separated from the valve box by the maintenance clearance along the axial direction of the fastening bolt while maintaining the engagement state between the valve operation device and the valve stem. It is characterized by engaging with a locking material inserted through the.

本発明の実施の形態におけるバルブ装置を示す一部断面図The partial cross section figure which shows the valve device in the form of execution of this invention 同バルブ装置のバルブ操作機を弁箱からメンテナンス用隙間だけ離間させた一部断面図Partial cross-sectional view of the valve operating unit of the valve device separated from the valve box by a clearance for maintenance 同バルブ装置の弁棒にメンテナンス用隙間を通して加工する状態を示す一部断面図Partial sectional view showing a state in which the valve stem of the valve device is machined through a maintenance gap スプライン外れ防止治具を示し、（ａ）は正面図、（ｂ）は側面図The spline detachment prevention jig is shown, (a) is a front view, and (b) is a side view. 同バルブ操作機を省略した平面図Top view with the valve operating device omitted 同バルブ装置の弁棒を示す正面図Front view showing the valve stem of the valve device 本発明の他の実施の形態におけるバルブ操作機を省略した平面図The top view which abbreviate | omitted the valve operating device in other embodiment of this invention 本発明の他の実施の形態におけるバルブ操作機を省略した平面図The top view which abbreviate | omitted the valve operating device in other embodiment of this invention 本発明の他の実施の形態におけるバルブ操作機を省略した平面図The top view which abbreviate | omitted the valve operating device in other embodiment of this invention 同実施の形態におけるバルブ操作機を省略した斜視図The perspective view which abbreviate | omitted the valve operating device in the embodiment

以下、本発明の実施の形態を図面に基づいて説明する。図１から図３において、バルブ装置１０はバタフライ弁、ボール弁等々の回転弁である。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 to 3, the valve device 10 is a rotary valve such as a butterfly valve or a ball valve.

バルブ装置１０は弁箱１１の内部に挿通した弁棒１２を有しており、弁棒１２は弁箱１１の内部に配置した弁体（図示省略）に接合し、頭部側が弁箱１１の外部に突出している。図６に示すように、弁棒１２は頭部にスプライン１３を備えている。弁箱１１にはバルブ操作機２０を装着しており、バルブ操作機２０は弁棒１２を回転駆動して弁体を弁棒１２の軸心廻りに回動させる。バルブ操作機２０は弁箱フランジ１４に対応する操作機フランジ２１を有しており、操作機フランジ２１に形成したボルト孔２２が弁箱フランジ１４に取り付けた締結ボルト１５に対応する。そして、締結ボルト１５に螺合するナット１６を締め付けて弁箱フランジ１４と操作機フランジ２１とを結合離間可能に締結している。ここでは、締結ボルト１５として埋め込みボルトを使用するが、六角ボルトを使用することも可能である。   The valve device 10 has a valve rod 12 inserted into the inside of the valve box 11, and the valve rod 12 is joined to a valve body (not shown) arranged inside the valve box 11, and the head side is the valve box 11. It protrudes to the outside. As shown in FIG. 6, the valve stem 12 includes a spline 13 on the head. A valve operating machine 20 is mounted on the valve box 11, and the valve operating machine 20 rotates the valve stem 12 to rotate the valve body about the axis of the valve stem 12. The valve operating machine 20 has an operating machine flange 21 corresponding to the valve box flange 14, and a bolt hole 22 formed in the operating machine flange 21 corresponds to the fastening bolt 15 attached to the valve box flange 14. And the nut 16 screwed together with the fastening bolt 15 is fastened, and the valve box flange 14 and the operating unit flange 21 are fastened so as to be separated from each other. Here, an embedded bolt is used as the fastening bolt 15, but a hexagonal bolt can also be used.

バルブ操作機２０は、その内部に入力軸２３と出力軸２４および入力軸２３と出力軸２４の間に配置した減速用歯車機構２５を備えており、入力軸２３に操作キャップ２６を装着し、出力軸２４を弁棒１２に装着している。出力軸２４は弁棒１２の頭部に嵌合するスプライン穴２７を有し、このスプライン穴２７で弁棒１２のスプライン１３に噛合し、スプライン穴２７とスプライン１３は弁棒１２の軸心方向のスプライン長に亘って噛合している。本実施の形態では、弁棒１２と出力軸２４とをスプライン接合させたが、キー接合を用いることも可能である。   The valve operating device 20 includes an input shaft 23 and an output shaft 24, and a reduction gear mechanism 25 disposed between the input shaft 23 and the output shaft 24, and an operation cap 26 is attached to the input shaft 23. An output shaft 24 is attached to the valve stem 12. The output shaft 24 has a spline hole 27 that fits into the head of the valve stem 12. The spline hole 27 meshes with the spline 13 of the valve stem 12, and the spline hole 27 and the spline 13 are in the axial direction of the valve stem 12. Meshing over the length of the spline. In the present embodiment, the valve stem 12 and the output shaft 24 are spline-joined, but key joining can also be used.

以下にバルブ操作機２０の脱着方法を説明する。   A method for detaching the valve operating device 20 will be described below.

図１に示すように、バルブ装置１０を全開もしくは所定開度の通水状態に維持しつつ、ナット１６を緩めて締結ボルト１５から取り外し、弁箱フランジ１４と操作機フランジ２１との締結を解除し、バルブ操作機２０を弁箱１１から離間可能な状態とする。そして、図４に示すスプライン外れ防止治具３０をバルブ装置１０およびバルブ操作機２０に装着する。図５はスプライン外れ防止治具３０を装着した状態を示しており、ここではバルブ操作機２０を省略して示している。   As shown in FIG. 1, while the valve device 10 is fully opened or maintained at a predetermined degree of water flow, the nut 16 is loosened and removed from the fastening bolt 15, and the fastening between the valve box flange 14 and the operating unit flange 21 is released. Then, the valve operating machine 20 is brought into a state in which it can be separated from the valve box 11. Then, the spline detachment preventing jig 30 shown in FIG. FIG. 5 shows a state in which the spline detachment preventing jig 30 is mounted, and the valve operating device 20 is omitted here.

スプライン外れ防止治具３０は、内側に凹部３１を有し、凹部３１が弁箱フランジ１４および操作機フランジ２１の外周縁に倣った円弧状をなし、凹部３１において弁箱フランジ１４および操作機フランジ２１に外嵌し、操作機フランジ２１が弁棒１２の軸心方向へメンテナンス用隙間Ｌに相当する一定距離だけ移動することを許容する。   The spline detachment prevention jig 30 has a concave portion 31 on the inner side, and the concave portion 31 has an arc shape that follows the outer peripheral edges of the valve box flange 14 and the operating device flange 21, and the valve box flange 14 and the operating device flange are formed in the concave portion 31. The operating device flange 21 is allowed to move by a fixed distance corresponding to the maintenance gap L in the axial direction of the valve stem 12.

次に、図２に示すように、スプライン穴２７とスプライン１３との係合状態を維持して弁棒１２および弁体の回動を防止しつつバルブ操作機２０を締結ボルト１５の軸心方向に沿って弁箱１１からメンテナンス用隙間Ｌだけ離間させる。このとき、スプライン外れ防止治具３０がバルブ操作機２０の過剰な引き抜きを防止する。バルブ操作機２０は人的作業によって引き上げても良く、揚重機等を使用して行ってもよく、メンテナンス用隙間Ｌだけ離間させた後に、弁箱フランジ１４および操作機フランジ２１との間に間隙保持材（図示省略）を挿入してもよい。   Next, as shown in FIG. 2, the valve operating unit 20 is moved in the axial direction of the fastening bolt 15 while maintaining the engaged state of the spline hole 27 and the spline 13 to prevent the valve rod 12 and the valve body from rotating. And the maintenance clearance L from the valve box 11. At this time, the spline detachment preventing jig 30 prevents the valve operating machine 20 from being pulled out excessively. The valve operating unit 20 may be lifted up manually or by using a lifting machine or the like, and after being separated by the maintenance gap L, there is a gap between the valve box flange 14 and the operating unit flange 21. A holding material (not shown) may be inserted.

この状態で、図３に示すように、バルブ装置１０の外側からメンテナンス用隙間Ｌを通して切削加工用の加工具４０、ここでは長尺ドリルを弁棒１２に向けて挿入し、加工具４０で弁棒１２に係合部５１としての有底穴６１を穿つ（図５参照）。   In this state, as shown in FIG. 3, a machining tool 40 for cutting work, here a long drill, is inserted toward the valve stem 12 through the maintenance gap L from the outside of the valve device 10, and the A bottomed hole 61 as an engaging portion 51 is drilled in the rod 12 (see FIG. 5).

次に、図５に示すように、弁棒１２の廻り止め用の係止材５２として係止ピン６２を、バルブ装置１０の外側からメンテナンス用隙間Ｌを通して挿入し、係止ピン６２の一端側を弁棒１２の係合部５１の有底穴６１に弁棒１２の軸心廻りで回動不能に係合させ、係止ピン６２の他端側を締結ボルト１５により弁棒１２の軸心廻りで係止する。このとき、必要に応じて締結ボルト１５と係止ピン６２の間に隙間調整用にシム６３を挿入する。ここでは、係止ピン６２を締結ボルト１５で係止したが、人的作業によって係止ピン６２を係止することも可能であり、あるいは締結ボルト１５に代えて装置外の固定物で支持することも可能である。   Next, as shown in FIG. 5, a locking pin 62 is inserted from the outside of the valve device 10 through the maintenance gap L as a locking member 52 for preventing the valve stem 12 from rotating, and one end side of the locking pin 62 is inserted. Is engaged with the bottomed hole 61 of the engaging portion 51 of the valve stem 12 so as not to rotate around the axis of the valve stem 12, and the other end of the locking pin 62 is connected to the shaft center of the valve stem 12 by the fastening bolt 15. Lock around. At this time, a shim 63 is inserted for adjusting the gap between the fastening bolt 15 and the locking pin 62 as necessary. Here, the locking pin 62 is locked by the fastening bolt 15, but the locking pin 62 can be locked by human work, or is supported by a fixed object outside the apparatus instead of the fastening bolt 15. It is also possible.

そして、係止ピン６２で弁棒１２を廻り止めした状態でバルブ操作機２０を脱着する。すなわち、バルブ操作機２０を弁箱１１から取り外し、メンテナンス作業後に戻すか、あるいは新しいバルブ操作機２０を装着する。   Then, the valve operating device 20 is detached while the valve rod 12 is stopped by the locking pin 62. That is, the valve operating device 20 is removed from the valve box 11 and returned after maintenance work, or a new valve operating device 20 is mounted.

本実施の形態では、既設のバルブ装置１０の弁棒１２に係合部５１を形成したが、バルブ装置１０を新設する際に、予め弁棒１２に係合部５１を形成しておくことも可能であり、係合部５１に代えて係合部５１を形成するためのマーキング部、例えばポンチ穴を形成することも可能である。   In the present embodiment, the engaging portion 51 is formed on the valve rod 12 of the existing valve device 10. However, when the valve device 10 is newly installed, the engaging portion 51 may be formed on the valve rod 12 in advance. It is possible to form a marking portion for forming the engaging portion 51 instead of the engaging portion 51, for example, a punch hole.

また、図７に示すように、係合部５１としては貫通孔６４を形成することも可能であり、貫通孔６４を貫通させて係止ピン６２を配置することで、係止ピン６２を二つの締結ボルト１５で安定した両端支持状態に保持することができる。   Further, as shown in FIG. 7, it is possible to form a through hole 64 as the engaging portion 51, and by disposing the locking pin 62 through the through hole 64, the locking pin 62 can be replaced by two. The two fastening bolts 15 can hold the both ends in a stable state.

さらに、図８に示すように、シム６３に代えてピン保持具６５を配置することも可能である。ピン保持具６５は締結ボルト１５の間に配置し、弁棒１２の軸心廻りにおいて締結ボルト１５で廻り止めされている。ピン保持具６２は弁棒１２の軸心廻りに沿った複数個所にピン保持用の溝もしくは穴６６を有しており、任意のピン保持用の溝もしくは穴６６で係止ピン６２を保持でき、係止ピン６２により弁体開度に応じた位置で弁棒１２を廻り止めすることができる。   Further, as shown in FIG. 8, a pin holder 65 can be arranged instead of the shim 63. The pin holder 65 is disposed between the fastening bolts 15 and is prevented from rotating by the fastening bolts 15 around the axis of the valve stem 12. The pin holder 62 has a pin holding groove or hole 66 at a plurality of locations along the axis of the valve stem 12, and the locking pin 62 can be held by any pin holding groove or hole 66. The valve rod 12 can be prevented from rotating at a position corresponding to the valve opening by the locking pin 62.

また、図９および図１０に示すように、係合部５１として、弁棒１２の両側に切り込み溝６７を形成し、切り込み溝６７に二股の係止ピン６８を挿入して弁棒１２を軸心廻りで係止することも可能である。   Further, as shown in FIGS. 9 and 10, as the engaging portion 51, a notch groove 67 is formed on both sides of the valve stem 12, and a bifurcated locking pin 68 is inserted into the notch groove 67 to pivot the valve stem 12. It is also possible to lock around the center.

１０ バルブ装置
１１ 弁箱
１２ 弁棒
１３ スプライン
１４ 弁箱フランジ
１５ 締結ボルト
１６ ナット
２０ バルブ操作機
２１ 操作機フランジ
２２ ボルト孔
２３ 入力軸
２４ 出力軸
２５ 減速用歯車機構
２６ 操作キャップ
２７ スプライン穴
３０ スプライン外れ防止治具
３１ 凹部
４０ 加工具
５１ 係合部
５２ 係止材
６１ 有底穴
６２ 係止ピン
６３ シム
６４ 貫通孔
６５ ピン保持具
６６ ピン保持の溝もしくは穴
６７ 切り込み溝
６８ 二股の係止ピン
Ｌ メンテナンス用隙間 DESCRIPTION OF SYMBOLS 10 Valve apparatus 11 Valve box 12 Valve rod 13 Spline 14 Valve box flange 15 Fastening bolt 16 Nut 20 Valve operating machine 21 Operating machine flange 22 Bolt hole 23 Input shaft 24 Output shaft 25 Reduction gear mechanism 26 Operation cap 27 Spline hole 30 Spline Detachment prevention jig 31 Recess 40 Processing tool 51 Engagement part 52 Locking material 61 Bottomed hole 62 Locking pin 63 Shim 64 Through hole 65 Pin holder 66 Pin holding groove or hole 67 Cut groove 68 Bifurcated locking pin L Maintenance clearance

Claims (4)

弁箱内に挿通した弁棒の軸心廻りに回動する弁体を有し、弁棒を回転駆動するバルブ操作機を弁棒に装着したバルブ装置において、バルブ操作機と弁箱の締結を解除し、バルブ操作機と弁棒との係合状態を維持しつつバルブ操作機を弁箱からメンテナンス用隙間だけ離間させ、メンテナンス用隙間を通して加工具で弁棒に係合部を形成し、弁棒の廻り止め用の係止材を係合部に装着する状態でバルブ操作機を脱着させることを特徴とするバルブ操作機の脱着方法。   In a valve device that has a valve body that rotates around the axis of the valve stem that is inserted into the valve casing, and that is mounted on the valve stem that drives the valve stem to rotate, fasten the valve operator to the valve casing. The valve operating unit is released from the valve box by a clearance for maintenance while maintaining the engaged state between the valve operating unit and the valve stem, and an engaging portion is formed on the valve stem by the processing tool through the maintenance clearance. A method for attaching and detaching a valve operating device, wherein the valve operating device is attached and detached in a state in which a locking member for preventing rotation of the rod is attached to the engaging portion. バルブ操作機は、弁箱の弁箱フランジに設けた締結ボルトの軸心方向に沿って弁箱から離間し、係止材は一端側が弁棒の係合部に弁棒の軸心廻りで回動不能に係合し、他端側が締結ボルトにより弁棒の軸心廻りで係止されることを特徴とする請求項１に記載のバルブ操作機の脱着方法。   The valve operating unit is separated from the valve box along the axial direction of the fastening bolt provided on the valve box flange of the valve box, and one end side of the locking material is rotated around the axis of the valve stem to the engaging part of the valve stem. 2. The method for attaching and detaching a valve operating device according to claim 1, wherein the valve operating device is engaged so as to be immovable and the other end side is locked around a shaft center of the valve rod by a fastening bolt. 弁箱内に挿通した弁棒の軸心廻りに回動する弁体を有し、弁棒を回転駆動するバルブ操作機を弁体に装着したバルブ装置において、
弁箱は、弁箱フランジにバルブ操作機と弁箱とを結合離間可能に締結する締結ボルトを有し、
弁棒は、弁棒の廻り止め用の係止材と係合する係合部を形成するためのマーキング部を有し、
マーキング部は、バルブ操作機と弁棒との係合状態を維持しつつバルブ操作機を弁箱から締結ボルトの軸心方向に沿ってメンテナンス用隙間だけ離間させた状態において、メンテナンス用隙間において露出することを特徴とするバルブ装置。 In a valve device that has a valve body that rotates about the axis of a valve stem that is inserted into the valve box, and that is equipped with a valve operating device that rotates the valve stem.
The valve box has a fastening bolt for fastening the valve operating unit and the valve box to the valve box flange so as to be separated from each other.
The valve stem has a marking portion for forming an engagement portion that engages with a locking member for stopping the rotation of the valve stem,
The marking part is exposed in the maintenance gap when the valve operating machine is kept away from the valve box by the maintenance gap along the axial direction of the fastening bolt while maintaining the engagement between the valve operating machine and the valve stem. A valve device characterized by: 弁箱内に挿通した弁棒の軸心廻りに回動する弁体を有し、弁棒を回転駆動するバルブ操作機を弁体に装着したバルブ装置において、
弁箱は、弁箱フランジにバルブ操作機と弁箱とを結合離間可能に締結する締結ボルトを有し、
弁棒は、弁棒の廻り止め用の係止材と係合する係合部を有し、
係合部は、バルブ操作機と弁棒との係合状態を維持しつつバルブ操作機を弁箱から締結ボルトの軸心方向に沿ってメンテナンス用隙間だけ離間させた状態において、メンテナンス用隙間に挿通した係止材と係合することを特徴とするバルブ装置。
In a valve device that has a valve body that rotates about the axis of a valve stem that is inserted into the valve box, and that is equipped with a valve operating device that rotates the valve stem.
The valve box has a fastening bolt for fastening the valve operating unit and the valve box to the valve box flange so as to be separated from each other.
The valve stem has an engaging portion that engages with a locking member for stopping rotation of the valve stem,
The engaging portion is a gap for maintenance in a state where the valve operating unit is separated from the valve box by the maintenance clearance along the axial direction of the fastening bolt while maintaining the engagement state between the valve operating unit and the valve stem. A valve device that engages with an inserted locking member.
JP2016248540A 2016-12-22 2016-12-22 Method for attaching and detaching valve operating device and valve device Active JP6715178B2 (en)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001193864A (en) * 2000-01-11 2001-07-17 Kubota Corp Valve element lock device
JP2003074740A (en) * 2001-09-04 2003-03-12 Tomoe Tech Res Co Opening limiting device for rotary valve

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001193864A (en) * 2000-01-11 2001-07-17 Kubota Corp Valve element lock device
JP2003074740A (en) * 2001-09-04 2003-03-12 Tomoe Tech Res Co Opening limiting device for rotary valve

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