JP2018066480A - Valve body removal device and valve body removal method - Google Patents

Valve body removal device and valve body removal method Download PDF

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JP2018066480A
JP2018066480A JP2018006963A JP2018006963A JP2018066480A JP 2018066480 A JP2018066480 A JP 2018066480A JP 2018006963 A JP2018006963 A JP 2018006963A JP 2018006963 A JP2018006963 A JP 2018006963A JP 2018066480 A JP2018066480 A JP 2018066480A
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valve
flange
pipe
case
divided
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JP6721619B2 (en
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星野 洋一郎
Yoichiro Hoshino
洋一郎 星野
謙介 中里
Kensuke Nakazato
謙介 中里
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Cosmo Koki Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a valve body removal device and a valve body removal method capable of being applied to various valve devices, eliminating the need of enclosing the entire valve device, and enclosing a pipe conduit portion body and a valve main body portion by an operation case in a sealed state only by a work at a valve main body portion side with respect to a fluid pipe conduit.SOLUTION: A valve body removal device includes an operation case 30 enclosing a valve main body portion 11 in a sealed state, an operation valve 26 partitioning an internal space of the operation case 30, valve moving means 91 capable of moving the valve main body portion 11 in the operation case 30, fastening members 23, 25 for fastening a first flange 6 and a second flange 13, and a support 96 supporting the operation case 30 and adjusting a height. The operation case 30 is composed of a first divided body 31 having a sealing portion 36 for sealing a radial outer side of an insertion hole of the first flange 6 to which the fastening members 23, 25 are inserted, and a second divided body 61 enclosing the valve main body portion 11, and the first divided body 31 is divided into at least two in a circumferential direction of the first flange 6.SELECTED DRAWING: Figure 2

Description

本発明は、既設流体管に連結された弁装置の弁体を撤去する弁体撤去装置及び弁体撤去方法に関する。   The present invention relates to a valve body removing device and a valve body removing method for removing a valve body of a valve device connected to an existing fluid pipe.

従来、水道本管等の既設流体管には仕切弁等の弁装置が設けられており、既設流体管の流体管路を遮断できるようになっている。例えば、仕切弁は、その構造上、流体管路を遮断するための弁体やこの弁体を操作するための操作軸等からなる弁本体部が、流体管路に対して大きく突出するので、耐久年数に至って流体管路を遮断する能力が低下した場合や、仕切弁が流体管路に不要になった場合等に、作業用ケースで仕切弁を密封状に囲って、流体管路から仕切弁全体を撤去して流体管を配置したり、仕切弁を流体管路としてのみ使用するため、または将来、仕切弁として再利用するために管路部を残して弁本体部のみを撤去したりする撤去工事が行われている。   Conventionally, an existing fluid pipe such as a water main pipe has been provided with a valve device such as a gate valve so that the fluid conduit of the existing fluid pipe can be blocked. For example, because of the structure of the gate valve, the valve main body composed of a valve body for shutting off the fluid pipe line, an operation shaft for operating the valve body, and the like greatly protrudes from the fluid pipe line. When the ability to shut off the fluid line is reduced due to the end of the service life, or when the gate valve is no longer necessary for the fluid line, the work valve is sealed in a sealed manner in the work case, and the partition is separated from the fluid line. To remove the entire valve and place the fluid pipe, or to use the gate valve only as a fluid pipe line, or to remove only the valve body part leaving the pipe part for reuse as a gate valve in the future Removal work is being carried out.

作業用ケースで仕切弁全体を囲って管路部を残して弁体を取り除くことが可能な方法として、例えば、流体管路を挟み上部と下部とに分割された構造の作業用ケースで、仕切弁及び仕切弁近傍の流体管路を上下方向から挟むようにして、作業用ケースを仕切弁近傍の流体管路の外周に水密状に装着し、作業用ケースに備えられた弁本体部の脱着手段により、作業用ケース内で弁本体部を管路部から取り外した後に、作業用ケースに備えられた作業弁により、作業用ケース内において管路部側の空間を密封状に閉塞することで、弁本体部を作業用ケース外に取り出して、弁本体部内の弁体を新しいものに交換するようにしたものがある(例えば、特許文献1、2参照)。   As a method for removing the valve body by surrounding the entire gate valve with the work case and leaving the pipe section, for example, a work case having a structure divided into an upper part and a lower part across the fluid pipe line may be used. The work case is attached to the outer periphery of the fluid pipe line near the gate valve in a watertight manner so that the fluid pipe line near the valve and the gate valve is sandwiched from above and below. After removing the valve body part from the pipe part in the work case, the work valve provided in the work case closes the space on the pipe part side in the work case in a sealing manner. There is one in which the main body is taken out of the working case and the valve body in the valve main body is replaced with a new one (for example, see Patent Documents 1 and 2).

また、別の方法として、例えば、仕切弁の弁体を不断流状態で取り外すことが可能な方法として、予め、仕切弁装置において弁本体部が着脱可能に接合される管路部側のフランジ部を、このフランジ部に接合される弁本体部側のフランジ部よりも半径方向外周側に大きく張出すような大型に製造しておき、仕切弁装置が流体管路網等で使用されて、流体管路を遮断する能力が低下した場合等には、管路部側のフランジ部に、キヤップ型の作業用ケースを備えた不断水弁体離脱装置を密封状に装着して、作業用ケース内で弁体を取り外し可能にしたものもある(例えば、特許文献3参照)。   In addition, as another method, for example, as a method of removing the valve body of the gate valve in an uninterrupted state, a flange portion on the pipe section side in which the valve main body portion is detachably joined in advance in the gate valve device Is manufactured in a large size so as to protrude more radially outward than the flange portion on the valve main body side to be joined to the flange portion, and the gate valve device is used in a fluid pipe network, etc. If the ability to shut off the pipeline is reduced, etc., install a continuous water valve detachment device with a cap-type work case on the flange on the pipeline side in a sealed manner. In some cases, the valve body can be removed (see, for example, Patent Document 3).

特開2012−207719号公報(第6頁、第6図)JP 2012-207719 (6th page, FIG. 6) 特開2007−177945号公報(第6頁、第9図)JP 2007-177945 A (page 6, FIG. 9) 特開平10−26237号公報(第3頁、第6図)JP-A-10-26237 (page 3, FIG. 6)

しかしながら、特許文献1、2にあっては、流体管路を挟み上部と下部とに分割されて形成された作業用ケースによって、仕切弁を上下方向から仕切弁近傍の流体管路ごと水密状に覆うよう必要がある。大型の仕切弁を有する水道本管等において流体管路を下方から作業用ケースで覆うためには、埋設地盤を水道本管から大きく離間させるように掘削して、十分な作業スペースを確保する必要があり、掘削作業や埋戻作業に多大な時間を要し、作業効率が低下するという問題がある。   However, in Patent Documents 1 and 2, the gate valve is made watertight together with the fluid pipe line in the vicinity of the gate valve from above and below by the working case formed by dividing the fluid pipe into the upper part and the lower part. It is necessary to cover. In order to cover a fluid pipe line with a work case from below in a water main having a large gate valve, it is necessary to excavate the buried ground so as to be largely separated from the water main to ensure a sufficient working space. There is a problem that excavation work and backfilling work take a lot of time and work efficiency is lowered.

また、特許文献3にあっては、管路部を流体管路ごと作業用ケースで囲わないので、大きな作業用スペースを掘削して確保する必要はないものの、仕切弁装置の製造時に予め管路部の外周部に特殊な大型のフランジ部を形成しておく必要があり、既設の一般的な弁装置に対応できず、実用に供さないという問題がある。   Further, in Patent Document 3, since the pipe part is not surrounded by the working case together with the fluid pipe line, it is not necessary to excavate and secure a large working space, but the pipe line is previously prepared when the gate valve device is manufactured. It is necessary to form a special large flange portion on the outer peripheral portion of the portion, and there is a problem that it cannot be used for an existing general valve device and is not practically used.

本発明は、このような問題点に着目してなされたもので、種々の弁装置に適用可能であるとともに、弁装置全体を囲う必要がなく、流体管路よりも弁本体部側での作業のみで管路部本体及び弁本体部を作業用ケースで密封状に囲うことのできる弁体撤去装置及び弁体撤去方法を提供することを目的とする。   The present invention has been made paying attention to such problems, and can be applied to various valve devices, and does not need to surround the entire valve device, so that the operation on the valve main body side rather than the fluid conduit is performed. It aims at providing the valve body removal apparatus and the valve body removal method which can enclose a pipe line part main body and a valve main-body part by a working case in a sealing form only.

前記課題を解決するために、本発明の弁体撤去装置は、
流体管に連結される管路部本体、及び該管路部本体の内部を閉塞可能な弁本体部を備える弁装置の前記弁本体部を、前記管路部本体から不断流状態で撤去するための弁体撤去装置において、
前記弁体撤去装置は、前記弁本体部を密封状態に囲う作業用ケースと、前記作業用ケースの内部空間を仕切る作業弁と、前記弁本体部を前記作業用ケース内で移動を可能とする弁移動手段と、前記管路部本体に設けられた第1フランジ及び前記弁本体部に設けられた第2フランジを締結する締結部材と、前記作業用ケースを支持するとともに高さ調整を行うサポートと、を備え、
前記作業用ケースは、前記締結部材が挿通される前記第1フランジの挿通孔の径方向外側を封止する封止部を有する第1分割体、及び前記弁本体部を囲う第2分割体から構成され、前記第1分割体は、前記第1フランジの周方向に少なくとも2分割されていることを特徴としている。
この特徴によれば、作業用ケースが、第1フランジの締結部材挿通孔の径方向外側を封止して、弁装置の一部を作業用ケースで密封状に囲うので、種々の弁装置に適用可能であるとともに、サポートによって高さ調整を行うことで密封性を確実にし、流体管よりも弁本体部側での作業のみで、弁装置から弁本体部を撤去することができる。
In order to solve the above-mentioned problem, the valve body removal device of the present invention includes:
In order to remove the valve main body portion of the valve device including a pipe body connected to the fluid pipe and a valve main body capable of closing the inside of the pipe main body from the pipe main body in an uninterrupted state. In the valve body removal device of
The valve body removal device enables a work case that encloses the valve body part in a sealed state, a work valve that partitions an internal space of the work case, and the valve body part can be moved in the work case. A valve moving means, a first flange provided in the pipe body and a fastening member for fastening the second flange provided in the valve body, and a support for supporting the work case and adjusting the height And comprising
The working case includes a first divided body that has a sealing portion that seals a radially outer side of the insertion hole of the first flange through which the fastening member is inserted, and a second divided body that surrounds the valve main body portion. It is comprised, The said 1st division body is divided at least into the circumferential direction of the said 1st flange, It is characterized by the above-mentioned.
According to this feature, the working case seals the outer side in the radial direction of the fastening member insertion hole of the first flange and surrounds a part of the valve device in a sealed manner with the working case. In addition to being applicable, the height can be adjusted by a support to ensure sealing performance, and the valve main body can be removed from the valve device only by work on the valve main body side of the fluid pipe.

本発明の弁体撤去装置は、
前記封止部は、前記第1フランジの外周面あるいは軸方向下端面を封止することを特徴としている。
この特徴によれば、作業用ケースが、第1フランジの外周面あるいは軸方向下端面を封止して、弁装置の一部を作業用ケースで密封状に囲うので、種々の弁装置に適用可能であるとともに、弁装置全体を囲う必要がなく、弁装置から弁本体部を撤去することができる。
The valve body removal device of the present invention is
The sealing portion seals the outer peripheral surface or the axial lower end surface of the first flange.
According to this feature, the working case seals the outer peripheral surface of the first flange or the lower end surface in the axial direction, and part of the valve device is hermetically enclosed by the working case, so that it can be applied to various valve devices. It is possible, and it is not necessary to enclose the entire valve device, and the valve main body can be removed from the valve device.

本発明の弁体撤去装置は、
前記締結部材は、少なくとも前記第2フランジから前記作業弁の方向に突出する長尺ナットを備えることを特徴としている。
この特徴によれば、締結部材が、少なくとも第2フランジから作業弁の方向に突出する長尺ナットとなっているので、作業用ケースのスペースが狭くとも、ナットに容易にアクセスできるので、分解組立て作業が容易となり、流体管路よりも弁本体部側での作業のみで、弁装置から弁体を撤去することができる。
The valve body removal device of the present invention is
The fastening member includes a long nut that protrudes at least from the second flange toward the work valve.
According to this feature, the fastening member is a long nut that protrudes at least from the second flange in the direction of the work valve. Therefore, the nut can be easily accessed even if the space for the work case is small. The operation is facilitated, and the valve element can be removed from the valve device only by the operation on the valve main body side of the fluid conduit.

本発明の弁体撤去装置は、
前記作業用ケースは、該作業用ケースの外部から操作可能であるとともに前記第2フランジを前記第1フランジ側に保持する保持手段を備えることを特徴としている。
この特徴によれば、作業用ケースの外部から操作可能である保持手段を備えているので、弁装置の全体を作業用ケースで密封状に囲うことなく、種々の弁装置に適用可能であるとともに、弁装置全体を囲う必要がなく、流体管よりも弁本体部側での作業のみで、弁装置から弁本体部を撤去することができる。
The valve body removal device of the present invention is
The work case is operable from the outside of the work case, and further includes holding means for holding the second flange on the first flange side.
According to this feature, since the holding means that can be operated from the outside of the working case is provided, the entire valve device can be applied to various valve devices without enclosing the work case in a sealed manner. It is not necessary to enclose the entire valve device, and the valve main body portion can be removed from the valve device only by work on the valve main body side of the fluid pipe.

本発明の弁体撤去装置は、
前記第1分割体は、前記第2フランジとの間に隙間を有する筒部を備えることを特徴としている。
この特徴によれば、筒部は、第2フランジとの間に隙間を有するので、弁本体部を取り外す際に干渉せず、確実に弁本体部を撤去することができる。
The valve body removal device of the present invention is
The first divided body includes a cylindrical portion having a gap between the first divided body and the second flange.
According to this feature, since the cylinder portion has a gap with the second flange, the valve body portion can be reliably removed without interference when the valve body portion is removed.

本発明の弁体撤去装置は、
前記第1分割体は、前記第1フランジの少なくとも短軸方向に沿って2分割されることを特徴としている。
この特徴によれば、第1分割体は、第1フランジの少なくとも短軸方向に沿って2分割されているので、第1分割体を第1フランジの長軸方向に沿って組立てる際、第1フランジの外周面をガイドにしつつ、第1分割体と第1フランジとのクリアランスが徐々に狭くなり、第1分割体が傾くことなく第1フランジの外周部に密接させて確実に封止することができるとともに、種々の弁装置の第1フランジに確実に取付けることができる。
The valve body removal device of the present invention is
The first divided body is divided into two along at least the minor axis direction of the first flange.
According to this feature, the first divided body is divided into two along at least the minor axis direction of the first flange. Therefore, when the first divided body is assembled along the major axis direction of the first flange, Using the outer peripheral surface of the flange as a guide, the clearance between the first divided body and the first flange is gradually narrowed, and the first divided body is closely sealed to the outer peripheral portion of the first flange without tilting. And can be securely attached to the first flange of various valve devices.

流体管に連結される管路部本体、該管路部本体の内部を閉塞可能な弁本体部を備える弁装置の前記弁本体部を、前記管路部本体から不断流状態で撤去するための弁体撤去方法において、
前記管路部本体に設けられた第1フランジ及び前記弁本体部に設けられた第2フランジを接続するボルト、ナットを作業用ボルト、ナットに交換する工程と、
前記第1フランジの外周面あるいは軸方向下端面を、作業用ケースを構成し前記第1フランジの周方向に少なくとも2分割される第1分割体で封止するとともに、サポートによって前記作業用ケースを支持するとともに高さ調整を行い、前記弁本体部を、前記作業用ケースを構成する第2分割体で密封状態に囲う工程と、
前記作業用ケース内で前記管路部本体から前記弁本体部を取り外す工程と、
前記作業用ケース内に備えられた作業弁によって、前記作業用ケース内における前記弁本体部よりも前記管路部本体側を密封状態に閉塞する工程と、
前記弁本体部を取り出す工程と、
を備えることを特徴としている。
この特徴によれば、作業用ケースが、第1フランジの外周面の一部を封止するとともに、弁装置の一部を作業用ケースで密封状態に囲うので、種々の弁装置に適用可能であるとともに、サポートによって高さ調整を行うことで密封性を確実にし、流体管よりも弁本体部側での作業のみで、弁装置から弁本体部を撤去することができる。
A pipe body connected to a fluid pipe, and the valve main body of a valve device including a valve main body capable of closing the inside of the pipe main body for removing the valve body from the pipe body in an uninterrupted state. In the valve body removal method,
A bolt for connecting the first flange provided in the pipe body and the second flange provided in the valve body, and a step of replacing the nut with a working bolt and nut;
The outer peripheral surface or the axial lower end surface of the first flange is sealed with a first divided body that constitutes a working case and is divided into at least two parts in the circumferential direction of the first flange, and the working case is supported by a support. Supporting and adjusting the height, and enclosing the valve body in a sealed state with a second divided body constituting the working case;
Removing the valve body from the conduit body in the working case;
The process valve provided in the working case closes the conduit portion main body side in a sealed state rather than the valve main body portion in the working case;
Removing the valve body,
It is characterized by having.
According to this feature, the work case seals a part of the outer peripheral surface of the first flange, and a part of the valve device is enclosed in a sealed state by the work case. Therefore, the work case can be applied to various valve devices. In addition, the height can be adjusted by the support to ensure the sealing performance, and the valve main body can be removed from the valve device only by the work on the valve main body side of the fluid pipe.

(a)は、実施例における仕切弁を示す平面図であり、(b)は、の側面図である。(A) is a top view which shows the gate valve in an Example, (b) is a side view. 仕切弁に装着された弁体撤去装置を示す一部断面の側面図である。It is a side view of the partial cross section which shows the valve body removal apparatus with which the gate valve was mounted | worn. (a)は、図2のC−C矢視図であり、(b)は、図3(a)のJ−J矢視図である。(A) is a CC arrow view of FIG. 2, (b) is a JJ arrow view of FIG. 3 (a). (a)は、封止部の詳細図であり、(b)は、図3(a)のH−H矢視図であり、(c)は、図3(a)のH−H矢視図の別の実施形態を示す図である。(A) is detail drawing of a sealing part, (b) is a HH arrow line view of Fig.3 (a), (c) is a HH arrow line view of Fig.3 (a). FIG. 6 shows another embodiment of the figure. (a)は、吊耳切断、(b)は、作業用ボルト、作業用ナットに交換する手順を示す図である。(A) is hanging ear cutting, (b) is a diagram showing a procedure for exchanging with work bolts and work nuts. (a)は、分割式取付部材の取付け手順、(b)はキャップの取外し、(c)は、分割式取付部材の取付けた後の状態を示す一部断面の側面図である。(A) is the attachment procedure of a division | segmentation type attachment member, (b) is removal of a cap, (c) is a side view of the partial cross section which shows the state after attachment of a division | segmentation type attachment member. (a)は、弁吊移動工具を取付けた状態を示す平面図、(b)は、一部断面の側面図、(c)は(a)のH−H矢視図である。(A) is a top view which shows the state which attached the valve suspension movement tool, (b) is a side view of a partial cross section, (c) is a HH arrow directional view of (a). 仕切弁に装着された弁体撤去装置を示す一部断面の側面図である。It is a side view of the partial cross section which shows the valve body removal apparatus with which the gate valve was mounted | worn. 弁本体部を引上げた状態を示す一部断面の側面図である。It is a side view of the partial cross section which shows the state which pulled up the valve main-body part. (a)は、別のタイプの仕切弁に適合した分割式取付部材の実施形態の平面図、(b)は、管軸方向から見た一部断面図、(c)は、一部断面の側面図である。(A) is a plan view of an embodiment of a split-type mounting member suitable for another type of gate valve, (b) is a partial cross-sectional view seen from the tube axis direction, and (c) is a partial cross-sectional view. It is a side view. (a)は、さらに別のタイプの仕切弁に適合した分割式取付部材の実施形態の平面図、(b)は、管軸方向から見た一部断面図、(c)は、一部断面の側面図である。(A) is a plan view of an embodiment of a split-type mounting member adapted to yet another type of gate valve, (b) is a partial cross-sectional view as seen from the tube axis direction, and (c) is a partial cross-section. FIG. (a)は、保持手段を使用しない場合の実施形態の平面図、(b)は、管軸直角方向から見た一部断面の側面図、(c)は、管軸方向から見た図である。(A) is a plan view of the embodiment when the holding means is not used, (b) is a side view of a partial cross section seen from the direction perpendicular to the tube axis, and (c) is a view seen from the tube axis direction. is there. 保持手段を使用しない場合の弁体撤去方法の手順を示す一部断面の側面図である。It is a side view of the partial cross section which shows the procedure of the valve body removal method when not using a holding means. (a)は、作業用ナットを使用しない場合の実施形態の平面図、(b)は、一部断面の側面図、(c)は、作業用ボルトを支持する支持部材を示す平面図、(d)は、作業用ボルトを支持する支持部材を取付けた状態を示す一部断面の側面図である。(A) is a plan view of an embodiment when a working nut is not used, (b) is a side view of a partial cross-section, (c) is a plan view showing a support member that supports the working bolt, d) is a side view of a partial cross section showing a state in which a support member for supporting a work bolt is attached. 作業用ナットを使用しない分割式取付部材の別の実施形態を示す一部断面の側面図である。It is a side view of the partial cross section which shows another embodiment of the split-type attachment member which does not use a work nut. (a)は、第1の分割体を一体構成にした場合の実施形態を示す平面図、(b)は、一部断面の側面図である。(A) is a top view which shows embodiment at the time of integrating the 1st division body, (b) is a side view of a partial cross section.

本発明に係る弁体撤去装置及び弁体撤去方法を実施するための形態を実施例に基づいて以下に説明する。   EMBODIMENT OF THE INVENTION The form for implementing the valve body removal apparatus and valve body removal method which concern on this invention is demonstrated below based on an Example.

実施例に係る弁体撤去装置について図1から図11を参照して説明する。図1に示すように、本実施例において、既設の流体管1、1’に流体管路を遮断可能な仕切弁2が連結されている。流体管1、1’及び仕切弁2の筐体は、例えば、地中に埋設される上水道用のダクタイル鋳鉄製であり、流体管1、1’は、断面視略円形状に形成され、内周面がモルタル層で被覆されている。尚、本発明に係る流体管及び弁装置は、その他鋳鉄、鋼等の金属製、あるいは石綿、コンクリート製、塩化ビニール、ポリエチレン若しくはポリオレフィン製等であってもよい。更に尚、流体管の内周面はモルタル層に限らず、例えばエポキシ樹脂等により被覆されてもよく、若しくは適宜の材料を粉体塗装により流体管の内周面に被覆してもよい。また、本実施例では流体管内の流体は上水であるが、本実施例の上水に限らず、例えば工業用水や農業用水、下水等の他、ガスやガスと液体との気液混合体であっても構わない。   A valve body removal apparatus according to an embodiment will be described with reference to FIGS. 1 to 11. As shown in FIG. 1, in this embodiment, a gate valve 2 capable of blocking a fluid pipe line is connected to existing fluid pipes 1, 1 ′. The casings of the fluid pipes 1, 1 ′ and the gate valve 2 are made of, for example, ductile cast iron for waterworks buried in the ground, and the fluid pipes 1, 1 ′ are formed in a substantially circular shape in cross section. The peripheral surface is covered with a mortar layer. The fluid pipe and valve device according to the present invention may be made of other metals such as cast iron and steel, or made of asbestos, concrete, vinyl chloride, polyethylene, or polyolefin. Furthermore, the inner peripheral surface of the fluid pipe is not limited to the mortar layer, and may be coated with, for example, an epoxy resin or the like, or an appropriate material may be coated on the inner peripheral surface of the fluid pipe with powder coating. In this embodiment, the fluid in the fluid pipe is clean water, but is not limited to clean water in this embodiment. For example, in addition to industrial water, agricultural water, sewage, etc., gas or gas-liquid mixture of gas and liquid It does not matter.

図1及び図2に示すように、本実施例での弁装置である仕切弁2は、管路部本体3と弁本体部11とから構成されている。管路部本体3は、流体管1、1’に連通する管部4と、管部4に一体に形成されたフランジ部7、7’と、管部4の管軸線A−Aと異なるB−B方向に突出された筒状の首部5と、本発明の第1フランジとしての管路部フランジ6と、から構成される。   As shown in FIGS. 1 and 2, the gate valve 2 which is a valve device in the present embodiment is composed of a pipe portion main body 3 and a valve main body portion 11. The pipe section body 3 includes a pipe section 4 communicating with the fluid pipes 1 and 1 ′, flange sections 7 and 7 ′ formed integrally with the pipe section 4, and B different from the pipe axis AA of the pipe section 4. It is comprised from the cylindrical neck part 5 protruded to -B direction, and the pipe line part flange 6 as a 1st flange of this invention.

弁本体部11は、管路部本体3を閉塞可能な弁体12(図9参照)と、本発明の第2フランジとしての弁蓋フランジ13と、弁蓋フランジ13と一体に形成された弁蓋14と、弁蓋14の上面に突出され、仕切弁2を外部から開閉操作するための棒状の弁棒部16と、弁蓋14に設けられ弁棒部16の外周面をシールするためのパッキン(図示略)を内部に備える弁箱15と、から構成され、弁箱15は弁蓋14との間をシールするためのパッキン(図示略)を介して弁箱上部ネジ17により着脱可能に接合されている。また、管路部本体3と弁本体部11とは、管路部本体3の管路部フランジ6と弁蓋フランジ13とをシールするためのパッキン(図示略)を介して、ボルト・ナット22により着脱可能に接合されている。   The valve body 11 includes a valve body 12 (see FIG. 9) capable of closing the pipe body 3, a valve lid flange 13 as a second flange of the present invention, and a valve formed integrally with the valve lid flange 13. A lid 14, a rod-like valve stem portion 16 that projects from the upper surface of the valve lid 14 and opens and closes the gate valve 2 from the outside, and a seal provided on the valve lid 14 for sealing the outer peripheral surface of the valve stem portion 16 A valve box 15 having a packing (not shown) inside, and the valve box 15 is detachable by a valve box upper screw 17 via a packing (not shown) for sealing between the valve lid 14 and the valve box 14. It is joined. Further, the pipe body 3 and the valve body 11 are bolts and nuts 22 via a packing (not shown) for sealing the pipe flange 6 and the valve lid flange 13 of the pipe body 3. It is joined so that attachment or detachment is possible.

また、管路部本体3の管部4の両端部には、外径方向に突出するフランジ部7,7’が形成されており、このフランジ部7,7’は、流体管1,1’の端部のフランジ部8,8’にパッキン(図示略)を介して密封状に接合されるとともに、フランジ部7,7’,8,8’同士がボルト・ナット(図示せず)で締結されている。   Also, flange portions 7 and 7 'projecting in the outer diameter direction are formed at both ends of the tube portion 4 of the conduit portion main body 3, and the flange portions 7 and 7' are fluid pipes 1 and 1 '. Are joined to the flanges 8 and 8 'at the ends of the flanges in a sealed manner through packing (not shown), and the flanges 7, 7', 8, and 8 'are fastened with bolts and nuts (not shown). Has been.

次に、図1、図2に示すように、本実施例の弁体撤去装置30は、仕切弁2の一部を密封状に囲う作業用ケース30と、作業用ケース30内に備えられるとともに作業用ケース30の外部からの操作により作業用ケース30の内部空間を空間Dと空間Eとに密封状に仕切ることが可能な作業弁26と、弁本体部11を作業用ケース30内で移動を可能とする本発明の弁移動手段としての弁吊移動工具91とから構成されている。   Next, as shown in FIGS. 1 and 2, the valve body removal device 30 of the present embodiment is provided in a working case 30 that encloses part of the gate valve 2 in a sealing manner, and in the working case 30. The working valve 26 capable of partitioning the internal space of the working case 30 into a space D and a space E by operation from the outside of the working case 30 and the valve main body 11 are moved in the working case 30. It is comprised from the valve suspension movement tool 91 as a valve movement means of this invention which enables this.

図2に示すように、作業用ケース30は、本発明の第1分割体としての分割式取付部材31と、本発明の第2分割体としての円筒部材61及び上部カバー71とからなる。尚、第2分割体は本実施例では、円筒部材であるが、断面形状が略小判形、略楕円、略角形などの筒部材でもよい。分割式取付部材31は、管路部フランジ6と弁本体部11の一部を囲っている。また、円筒部材61は、分割式取付部材31に接続され、作業弁26及び弁本体部11を囲い、上部カバー71は、円筒部材61に接続されて円筒部材61の開口を閉塞するとともに弁吊移動工具91が載置されている。   As shown in FIG. 2, the work case 30 includes a split mounting member 31 as a first split body of the present invention, a cylindrical member 61 and an upper cover 71 as a second split body of the present invention. In the present embodiment, the second divided body is a cylindrical member. However, the second divided body may be a cylindrical member having a cross-sectional shape that is approximately oval, approximately oval, or approximately square. The split attachment member 31 surrounds a part of the pipe line flange 6 and the valve body 11. The cylindrical member 61 is connected to the split mounting member 31 and surrounds the work valve 26 and the valve body 11. The upper cover 71 is connected to the cylindrical member 61 to close the opening of the cylindrical member 61 and to suspend the valve. A moving tool 91 is placed.

分割式取付部材31は、図2から図4(a)に示すように、封止部36は、管路部フランジ6の外周面に相対する位置で、分割式取付部材31の内周面に形成された環状の溝部37と、溝部37に嵌め込まれ、保持される密封部材38と、からなっている。また、密封部材38の厚さ寸法は、溝部37の深さより大きくして、密封部材38が適度に圧縮されるようにしている。本発明に係る密封部材として、断面が円形の丸ゴムパッキン、略C字状または方形状または、リップ付きのゴムパッキンを使用することができる。これにより、封止部36は、管路部フランジ6の外周面に接する密封部材38によって、流体管路よりも弁本体部側での作業のみで管路部を密封状に囲うことができる。図2から図4(a)においては、封止部36の密封部材38は、管路部フランジ6の外周面のみに接して密封しているが、管路部本体3の管路部フランジ6のボルト挿通孔24の径方向外側、すなわち管路部フランジ6の軸方向下端面のみを、または、前記管路部フランジ6の軸方向下端面と管路部フランジ6の外周面の両方を、密封部材によって封止することもできる。尚、密封部材は、止水性向上のため、第2フランジまで延設されるものであってもよい。   As shown in FIG. 2 to FIG. 4A, the split type mounting member 31 has a sealing portion 36 on the inner peripheral surface of the split type mounting member 31 at a position facing the outer peripheral surface of the pipe line flange 6. The annular groove portion 37 is formed, and a sealing member 38 that is fitted and held in the groove portion 37. The thickness dimension of the sealing member 38 is larger than the depth of the groove portion 37 so that the sealing member 38 is appropriately compressed. As the sealing member according to the present invention, a round rubber packing having a circular cross section, a substantially C-shaped or rectangular shape, or a rubber packing with a lip can be used. Thereby, the sealing part 36 can enclose a pipe line part sealingly only by the operation | work by the side of a valve main-body part rather than a fluid pipe line by the sealing member 38 which contact | connects the outer peripheral surface of the pipe line flange 6. FIG. In FIG. 2 to FIG. 4A, the sealing member 38 of the sealing portion 36 is sealed in contact with only the outer peripheral surface of the pipe portion flange 6, but the pipe portion flange 6 of the pipe portion main body 3. Of the bolt insertion hole 24 in the radial direction, that is, only the lower end surface in the axial direction of the pipe section flange 6, or both the lower end face in the axial direction of the pipe section flange 6 and the outer peripheral surface of the pipe section flange 6, It can also be sealed with a sealing member. Note that the sealing member may be extended to the second flange in order to improve the water-stopping property.

このように、少なくとも管路部フランジ6の外周面を封止部を有する第1分割体(分割式取付部材31)と、弁本体部の一部を囲う第2分割体(円筒部材61及び上部カバー71)とに分割されているので、第1分割体を管路部フランジ6の外周面に封止部を確実に取り付けた後に、第2分割体を取付けることができるので、作業用ケースで流体管部及び弁本体部を容易に覆うことができ、作業性を向上させることができる。   As described above, at least the outer peripheral surface of the pipe section flange 6 includes the first divided body (divided attachment member 31) having the sealing portion, and the second divided body (cylindrical member 61 and the upper part) surrounding a part of the valve body. Since the first divided body is securely attached to the outer peripheral surface of the pipe section flange 6 and the second divided body can be attached after the first divided body is divided into the cover 71), The fluid pipe portion and the valve main body portion can be easily covered, and the workability can be improved.

図4(a)に示すように、分割式取付部材31には、封止部36の環状の溝部37の上部から拡径するように連続的に設けられるとともに、弁蓋フランジ13の外側周面よりも若干大径に形成され平面視で略小判形の筒状をなし、弁蓋フランジ13よりも上方側に延びる筒部40が設けられており、更に、筒部40の上端部から拡径されるように平面視で大径略円形の鍔状に形成された大径鍔部41が連続的に設けられている。   As shown in FIG. 4A, the split mounting member 31 is continuously provided so as to increase in diameter from the upper part of the annular groove portion 37 of the sealing portion 36, and the outer peripheral surface of the valve lid flange 13. Is formed in a slightly larger diameter than the valve lid flange 13 and is formed in a substantially oval cylindrical shape in plan view. Further, the diameter of the cylinder 40 is increased from the upper end of the cylinder 40. Thus, the large-diameter collar portion 41 formed in a large-diameter substantially circular collar shape in a plan view is continuously provided.

このように、筒部40は、環状の溝部37の上部から拡径して弁蓋フランジ13との間に隙間を有するので、弁本体部11を取外す際に干渉せず、確実に弁本体部11を撤去することができ、また、本実施例の場合、分割式取付部材31を管路部フランジ6に取付けた後に、密封部材38の取付け状態を確認できるので、確実に封止部36を取付けることができる。尚、弁本体部11の撤去を妨げず、筒部40、弁本体部11への損傷を防ぐために前記隙間に弾性体・樹脂などを介在させてもよい。   Thus, since the cylinder part 40 has a gap from the upper part of the annular groove part 37 and has a gap with the valve lid flange 13, it does not interfere when the valve body part 11 is removed, and the valve body part reliably. 11 can be removed, and in the case of the present embodiment, the attachment state of the sealing member 38 can be confirmed after the split attachment member 31 is attached to the duct portion flange 6, so that the sealing portion 36 can be securely attached. Can be installed. In addition, in order to prevent damage to the cylinder part 40 and the valve main-body part 11 without preventing removal of the valve main-body part 11, you may interpose an elastic body, resin, etc. in the said clearance gap.

また、図3に示すように、分割式取付部材31は、管路部フランジ6の周方向に略均等に2分割構成されるとともに、管部4の管軸線A−A方向と略一致している。また、各分割片の分割面には、パッキン42が介在されて、ボルト・ナットにより密封状に接合されている。   Further, as shown in FIG. 3, the split attachment member 31 is divided into two substantially equally in the circumferential direction of the pipe line flange 6 and substantially coincides with the pipe axis AA direction of the pipe part 4. Yes. Further, packing 42 is interposed on the dividing surface of each divided piece and is joined in a sealed manner by bolts and nuts.

本実施例では、このように分割することで、分割式取付部材31は、小判形の管路部フランジ6の側面をガイドとして、分割式取付部材31が傾くことなく第1フランジの外周部に密接させて確実に封止することができる。また、管路部フランジ6の短径寸法と長径寸法の差が小さい場合には、管路部フランジ6の長軸方向、短軸方向の区別が困難となり、組立て方向を誤って組立てることがある。これに対し、分割式取付部材31は、管路部フランジ6の短軸方向に沿って、2分割されているので、管路部フランジ6に対し長径方向側から組立て可能となるので、組立て誤りを防止できる。さらに、分割式取付部材31を管路部フランジ6の長軸方向に沿って組立てる際、管路部フランジ6の外周面をガイドにしつつ、分割式取付部材31と管路部フランジ6とのクリアランスが徐々に狭くなるので、分割式取付部材31が傾くことなく管路部フランジ6の外周部に密接させて確実に封止することができるとともに、種々の弁装置の管路部フランジ6に確実に取付けることができる。   In the present embodiment, by dividing in this way, the split mounting member 31 is guided to the outer periphery of the first flange without tilting the split mounting member 31 with the side surface of the oval pipe section flange 6 as a guide. It can be tightly sealed and reliably sealed. Further, when the difference between the short diameter dimension and the long diameter dimension of the pipe line flange 6 is small, it becomes difficult to distinguish the long axis direction and the short axis direction of the pipe line flange 6 and the assembly direction may be mistakenly assembled. . On the other hand, since the split-type mounting member 31 is divided into two along the short axis direction of the pipe line flange 6, it can be assembled with respect to the pipe line flange 6 from the long diameter direction side, so that an assembly error occurs. Can be prevented. Further, when the split mounting member 31 is assembled along the long axis direction of the pipe section flange 6, the clearance between the split mounting member 31 and the pipe section flange 6 while using the outer peripheral surface of the pipe section flange 6 as a guide. Is gradually narrowed, so that the split-type mounting member 31 can be securely sealed by being brought into close contact with the outer peripheral portion of the pipe line flange 6 without tilting, and can be reliably attached to the pipe line flange 6 of various valve devices. Can be installed on.

分割式取付部材31を管路部フランジ6に取り付けることで、流体管路よりも弁本体部11側での作業のみで管路部本体3及び弁本体部11を作業用ケース30で密封状に囲うことができるので、流体管1や仕切弁2が地中に埋設されている場合でも、管路部本体3よりも深く掘削する必要がなく、掘削や埋戻し作業が容易になり、作業性を向上させることができる。   By attaching the split-type mounting member 31 to the pipe line flange 6, the pipe body 3 and the valve body 11 are sealed with the work case 30 only by work on the valve body 11 side of the fluid pipe. Since it can be enclosed, it is not necessary to dig deeper than the pipe body 3 even when the fluid pipe 1 or the gate valve 2 is buried in the ground, and excavation and backfilling work is facilitated, and workability is improved. Can be improved.

尚、分割式取付部材31の分割構造は、本実施例に限らず、例えば、管路部フランジ6の周方向に3分割以上の複数個の分割体に分割可能に構成してもよいし、管路部フランジ6の周方向に2分割に分割可能にするとともに首部5の管軸線方向にも複数個に分割可能に構成するようにしてもよい。さらに、分割せずに一体構造の第1分割体とすることもでき、種々の弁装置に適合して、作業用ケースを管路部に装着できる。   The split structure of the split mounting member 31 is not limited to the present embodiment, and may be configured to be split into a plurality of split bodies of three or more splits in the circumferential direction of the pipe line flange 6, The pipe part flange 6 may be divided into two parts in the circumferential direction and may be divided into a plurality of parts in the pipe axis direction of the neck part 5. Furthermore, it can also be set as the 1st division body of integral structure, without dividing | segmenting, and it can adapt to a various valve apparatus and can attach a working case to a pipe line part.

図4に示すように、分割式取付部材31の封止部36の下端には、管路部フランジ6と弁蓋フランジ13とを締付ける作業用ボルト23の頭を保持して、ボルトが抜けないように保持する支持部材43を有している。また、本発明の締結部材としての作業用ボルト23の外周面には、周方向に凹状の溝が形成され、この溝には、略環状のパッキンが嵌め込まれている。これらのパッキンにより、作業用ボルト23と挿通孔24との隙間が密封されて、作業ケース30内の流体が漏洩することが防止される。   As shown in FIG. 4, at the lower end of the sealing portion 36 of the split mounting member 31, the head of the working bolt 23 that fastens the pipe portion flange 6 and the valve lid flange 13 is held, and the bolt cannot be removed. It has the supporting member 43 hold | maintained. Further, a concave groove is formed in the circumferential direction on the outer peripheral surface of the working bolt 23 as the fastening member of the present invention, and a substantially annular packing is fitted in this groove. With these packings, the gap between the work bolt 23 and the insertion hole 24 is sealed, and the fluid in the work case 30 is prevented from leaking.

また、図3(a)の断面H−H及び図4(b)に示すように、筒部40の側周面において、弁蓋フランジ13の上面に対応する位置には、管路部本体3と弁本体部11とを接続する作業用ボルト23のほぼ中間位置に本発明の保持手段55が設けられている。保持手段55は、筒部40外周側から内周側に連通するネジ溝を有する連通孔51と、該連通孔51に挿入される固定ボルト52とから構成される。尚、この固定ボルト52のネジ山は、後述する傾斜部53と固定ボルト52の外周面に嵌め込まれたパッキンとの間の部位に設けられている。   Further, as shown in the cross-section HH of FIG. 3A and FIG. 4B, the pipe body 3 is located at a position corresponding to the upper surface of the valve lid flange 13 on the side circumferential surface of the tubular portion 40. The holding means 55 of the present invention is provided at a substantially intermediate position of the working bolt 23 connecting the valve body 11 and the valve body 11. The holding means 55 includes a communication hole 51 having a thread groove that communicates from the outer peripheral side of the cylindrical portion 40 to the inner peripheral side, and a fixing bolt 52 that is inserted into the communication hole 51. The thread of the fixing bolt 52 is provided at a portion between an inclined portion 53 described later and a packing fitted on the outer peripheral surface of the fixing bolt 52.

固定ボルト52は、図4に示すように、筒部40の内周側に突出される先端部に、先端側が漸次小径となるように形成され弁蓋フランジ13に当接可能な傾斜部53が設けられ、これにより、作業用ケース30の外部から固定ボルト52を回動させることで、ネジ作用により傾斜部53が進出されて、弁蓋フランジ13の上面に当接させることができる。また、ネジ作用により傾斜部53を後退させて、弁蓋フランジ13から離間させることができるようになっている。   As shown in FIG. 4, the fixing bolt 52 has an inclined portion 53 that is formed on the distal end portion that protrudes toward the inner peripheral side of the cylindrical portion 40 so that the distal end side gradually becomes smaller in diameter and can come into contact with the valve lid flange 13. Thus, by rotating the fixing bolt 52 from the outside of the working case 30, the inclined portion 53 can be advanced by the screw action and brought into contact with the upper surface of the valve lid flange 13. Further, the inclined portion 53 can be moved backward by the screw action so as to be separated from the valve lid flange 13.

固定ボルト52の傾斜部53を、弁蓋フランジ13の上面に当接させて、傾斜部53により弁本体部11が管路部本体3側に保持、固定される。これにより、作業用ケース30の分割式取付部材31を管路部フランジ6に取り付けた後に、固定ボルト52により弁本体部11を管路部本体3に固定して、作業用ボルト23、作業用ナット25の締結を解除することができ、且つ、作業用ケース30で弁本体部11を密封状に囲った後であっても、作業用ケース30外側から固定ボルト52を回転操作して、弁本体部11と管路部本体3との固定を解除することができる。   The inclined portion 53 of the fixing bolt 52 is brought into contact with the upper surface of the valve lid flange 13, and the valve main body portion 11 is held and fixed to the pipe portion main body 3 side by the inclined portion 53. Thereby, after attaching the split-type mounting member 31 of the working case 30 to the pipe line flange 6, the valve body 11 is fixed to the pipe body 3 by the fixing bolt 52, and the work bolt 23, the work Even after the nut 25 can be unfastened and the valve body 11 is hermetically enclosed by the work case 30, the fixing bolt 52 is rotated from the outside of the work case 30 to rotate the valve. The fixing of the main body 11 and the pipe main body 3 can be released.

また、固定ボルト52の外周面には、周方向に凹状の溝が形成され、この溝には、略環状のOリング54が嵌め込まれている。これらのパッキン54により、固定ボルト52と筒部40の連通孔51との隙間が密封されて、作業ケース30内の流体が漏洩することが防止される。   Further, a concave groove is formed in the circumferential direction on the outer peripheral surface of the fixing bolt 52, and a substantially annular O-ring 54 is fitted in this groove. These packings 54 seal the gap between the fixing bolt 52 and the communication hole 51 of the cylindrical portion 40, and prevent the fluid in the work case 30 from leaking.

また、固定ボルト52と弁蓋フランジ13との接触面圧が大きい場合には、図4(c)のように、固定ボルト52が弁蓋フランジ13と接触する部分をあらかじめ斜めに面加工部18を設け、接触面積を大きくすることもできる。さらに、固定ボルト52、連通孔51の個数や設置位置は、本実施例に限らず、固定ボルト52自体の強度や、作業用ケース30の重量、管路部本体3の周方向長さなどに応じて、本実施例よりも多く形成したり、少なく形成したりしてもよい。これにより、固定ボルト52で弁本体部11を管路部本体3側に保持することができる。   Further, when the contact surface pressure between the fixing bolt 52 and the valve lid flange 13 is large, as shown in FIG. Can be provided to increase the contact area. Further, the number and installation positions of the fixing bolts 52 and the communication holes 51 are not limited to the present embodiment, but may depend on the strength of the fixing bolts 52 themselves, the weight of the working case 30, the circumferential length of the pipe body 3, and the like. Accordingly, more or less than the present embodiment may be formed. As a result, the valve body 11 can be held on the side of the pipe body 3 by the fixing bolt 52.

また、図2に示すように、上部カバー71の閉塞部74の中央部には、上面側から下面側に連通する挿入孔75が形成されている。この挿入孔75には、弁本体部11を管路部本体3から引き上げて取り外すためのスピンドル92を挿入可能になっている。そして、上部カバー71とスピンドル92との間には、シール材76が介在されることで、作業用ケース30内は密閉される。   As shown in FIG. 2, an insertion hole 75 that communicates from the upper surface side to the lower surface side is formed in the central portion of the closing portion 74 of the upper cover 71. A spindle 92 for pulling up and removing the valve main body 11 from the conduit main body 3 can be inserted into the insertion hole 75. The work case 30 is hermetically sealed by a sealing material 76 interposed between the upper cover 71 and the spindle 92.

また、図2に示すように、弁吊移動工具91は、スピンドル92の上端に固定された支持板94と、上部カバー71の閉塞部74とを所定の距離を保つようにレバーホイスト95により固定されている。そして、弁蓋フランジ13を管路部本体3から取外すと、作業ケース内は流体で満たされ、スピンドルは水圧により上方に押し上げられ、支持板94はレバーホイスト95により所定の位置で固定される。この状態から、レバーホイスト95を緩めるように操作して、スピンドル92を徐々に移動させることができるようになっている。尚、水圧での押上げが不十分な場合、クレーンなどの引上げ装置を利用してもよい。また、スピンドル92の長さは、後述するように、作業用ケース30内に最も進出された際に、スピンドル92の先端が仕切弁2の弁棒部17の上端付近に達する一方で、スピンドル92で弁本体部11を管路部本体3から離間させるために最も後退された際に、弁本体部11の下端が作業弁26よりも上部に達するように調整されている。   Further, as shown in FIG. 2, the valve suspension moving tool 91 is fixed by a lever hoist 95 so as to keep a predetermined distance between the support plate 94 fixed to the upper end of the spindle 92 and the closing portion 74 of the upper cover 71. Has been. When the valve lid flange 13 is removed from the pipe section main body 3, the work case is filled with fluid, the spindle is pushed upward by water pressure, and the support plate 94 is fixed at a predetermined position by the lever hoist 95. From this state, the spindle hoist 92 can be gradually moved by operating the lever hoist 95 to be loosened. Note that a lifting device such as a crane may be used when the lifting with water pressure is insufficient. Further, the length of the spindle 92 is such that, as will be described later, when the tip of the spindle 92 reaches the vicinity of the upper end of the valve stem portion 17 of the gate valve 2 when it is most advanced into the working case 30, the spindle 92. Thus, the lower end of the valve main body 11 is adjusted so as to reach the upper part of the work valve 26 when the valve main body 11 is most retracted to be separated from the conduit main body 3.

次に、本実施例の弁体撤去方法について図5から図11を参照して説明する。図5から図11において、弁体6がほぼ全開状態にされており、仕切弁2を介して流体管1,1’には、流体が流れている状態である。   Next, the valve body removal method of a present Example is demonstrated with reference to FIGS. 5 to 11, the valve body 6 is substantially fully opened, and the fluid is flowing through the fluid pipes 1 and 1 ′ via the gate valve 2.

図5に示すように、仕切弁2の吊耳8が管路部フランジ6、弁蓋フランジ13の外周より飛び出している場合には、切断、除去する。そして、管路部フランジ6と弁蓋フランジ13とを接続している既設ボルト・ナット22を、作業用ボルト23、本発明の締結部材としての長尺の作業用ナット25に交換する。尚、所定の作業用ボルト23、作業用ナット25に交換する交換作業においては、既設ボルト・ナット23を一本ずつまたは所定本数ずつ交換することで、流体管1内の流体を漏洩させることなく、作業用ボルト23、作業用ナット25に交換することができる。尚、万力などで固定しながら、交換作業を行ってもよい。   As shown in FIG. 5, when the hanging ear 8 of the gate valve 2 protrudes from the outer periphery of the pipe line flange 6 and the valve lid flange 13, it is cut and removed. Then, the existing bolt / nut 22 connecting the pipe line flange 6 and the valve lid flange 13 is replaced with a work bolt 23 and a long work nut 25 as a fastening member of the present invention. In the replacement work for replacing the predetermined working bolt 23 and the working nut 25, the existing bolts and nuts 23 are replaced one by one or a predetermined number without leaking the fluid in the fluid pipe 1. The working bolt 23 and the working nut 25 can be exchanged. The replacement operation may be performed while fixing with a vise.

このように、長尺の作業用ナット25に交換することで、図6に示すように、分割式取付部材31の大径鍔部41から作業用ナット25が突出するので、作業スペースが狭くとも、ナットに容易にアクセスできるので、分解組立て作業が容易となる。なお、作業スペース内で作業用ナット25を取外すことができれば、作業用ナット25の長さは、分割式取付部材31の大径鍔部41から作業用ナット25を突出させる必要はない。   Thus, by replacing with the long work nut 25, as shown in FIG. 6, since the work nut 25 protrudes from the large-diameter flange 41 of the split mounting member 31, the work space is small. Since the nut can be easily accessed, the disassembling and assembling work becomes easy. If the work nut 25 can be removed in the work space, the work nut 25 does not have to be protruded from the large-diameter flange 41 of the split mounting member 31.

次に、図6に示すように、分割式取付部材31の分割片の間に、分割式取付部材31と別体あるいは接着・加硫などにより一体化したパッキン42を介在させて、該分割片を流体管1の管軸A−Aに略直交する向きに管路部フランジ6に被せて、ボルト・ナット32により仮固定状態で接合して、分割式取付部材31を一体化する。ここで、サポート96によって高さ調整を行い、分割式取付部材31の大径鍔部41の面が略水平となるように調整し、分割式取付部材31を確実に支持させる。   Next, as shown in FIG. 6, between the divided pieces of the split-type mounting member 31, a packing 42 integrated with the split-type mounting member 31 separately or by adhesion / vulcanization is interposed. Is attached to the pipe flange 6 in a direction substantially orthogonal to the pipe axis AA of the fluid pipe 1 and joined in a temporarily fixed state with bolts and nuts 32 to integrate the split attachment member 31. Here, the height is adjusted by the support 96 so that the surface of the large-diameter collar portion 41 of the split-type mounting member 31 is adjusted to be substantially horizontal, and the split-type mounting member 31 is reliably supported.

次に、図6、図7に示すように、分割式取付部材31の固定ボルト52を回転して、傾斜部53を弁蓋14と一体に形成された弁蓋フランジ13に軽く当接させる(図7(c))。この状態で、ボルト・ナット32を規定のトルクで締付け、分割式取付部材31を一体化する。さらにこの状態から、分割式取付部材31の固定ボルト52を規定のトルクで締付け、傾斜部53を弁蓋14と一体に形成された弁蓋フランジ13に強く当接させる。これにより、固定ボルト52によって、弁本体部11が管路部本体3側にしっかり保持されるので、管路部フランジ6と弁蓋フランジ13とを接続する作業用ボルト23、作業用ナット25を外しても、弁本体部11が管路部本体3から外れることを防止できる。また、固定ボルト52を軽く当接させて、水平を合わせた後に、サポート96によって、高さ調整及び支持を行うようにしても良い。   Next, as shown in FIGS. 6 and 7, the fixing bolt 52 of the split mounting member 31 is rotated to lightly contact the inclined portion 53 with the valve lid flange 13 formed integrally with the valve lid 14 ( FIG. 7 (c)). In this state, the bolt / nut 32 is tightened with a specified torque, and the split mounting member 31 is integrated. Further, from this state, the fixing bolt 52 of the split mounting member 31 is tightened with a prescribed torque, and the inclined portion 53 is brought into strong contact with the valve lid flange 13 formed integrally with the valve lid 14. As a result, the valve main body 11 is firmly held on the side of the pipe section main body 3 by the fixing bolt 52, so that the work bolt 23 and the work nut 25 for connecting the pipe section flange 6 and the valve lid flange 13 are removed. Even if it removes, it can prevent that the valve main-body part 11 remove | deviates from the pipe line part main body 3. FIG. Alternatively, the height may be adjusted and supported by the support 96 after the fixing bolt 52 is brought into light contact and the level is adjusted.

さらに、図6(b)に示すように、仕切弁2の弁棒部16の上端部に被せられ、弁棒部16を回動操作するための操作ハンドル(図示略)に嵌合するための規定形状を有したキャップ18を取り外しておく。キャップ18を取外しておくことで、仕切弁の高さを低く抑えることができる。作業スペースに余裕がある場合には、キャップ18を取付けた状態で作業することもできる。   Further, as shown in FIG. 6 (b), the upper end portion of the valve stem portion 16 of the gate valve 2 is covered with an operation handle (not shown) for rotating the valve stem portion 16. The cap 18 having the prescribed shape is removed. The height of the gate valve can be kept low by removing the cap 18. If there is room in the work space, the work can be performed with the cap 18 attached.

次に、図7に示すように、管路部本体3と弁蓋14とを接続する作業用ボルト23から、作業用ナット25を取り外す。この際、図4(a)に示す棒状の回転止め治具44を使用して、作業用ボルト23の回転止めをする。作業用ケース30が、分割式取付部材31(第1分割体)と第2分割体80とに分割構造となっているので、仕切弁2全体を作業用ケース30で囲むことなく開放した状態で、弁本体部11と管路部本体3を接続する既設ボルト・ナット22及び作業用ボルト23、作業用ナット25を取り外すことがきるので、作業性を向上させることができる。   Next, as shown in FIG. 7, the work nut 25 is removed from the work bolt 23 that connects the conduit body 3 and the valve lid 14. At this time, the rotation of the work bolt 23 is stopped using a rod-shaped rotation stop jig 44 shown in FIG. Since the work case 30 is divided into the split-type mounting member 31 (first divided body) and the second divided body 80, the whole gate valve 2 is opened without being surrounded by the work case 30. The existing bolts / nuts 22, the work bolts 23, and the work nuts 25 that connect the valve main body 11 and the pipe line main body 3 can be removed, so that workability can be improved.

さらに、図7(b)に示すように、スピンドル92の一端に取付けられた弁吊金具93を、仕切弁2の弁棒部16の上端部に被せ、弁蓋上部ねじ17を利用して、弁吊金具93と弁蓋14とを固定し、弁本体部11とスピンドル92とを接続する。   Further, as shown in FIG. 7B, a valve suspension fitting 93 attached to one end of the spindle 92 is put on the upper end portion of the valve stem portion 16 of the gate valve 2, and the valve lid upper screw 17 is used. The valve suspension fitting 93 and the valve lid 14 are fixed, and the valve main body 11 and the spindle 92 are connected.

次いで図8に示すように、分割式取付部材31の上部に円筒部材61を載せて、分割式取付部材31の大径鍔部41と、円筒部材61の下部フランジ62とをボルト・ナット64で締結して、分割式取付部材31と円筒部材61とを固定する。また、挿入孔75にスピンドル92を通した上部カバー71を円筒部材61の上部に載せて、円筒部材61の上部フランジ63と、上部カバー71のフランジ72とをボルト・ナット73で締結して、円筒部材61と上部カバー71とを固定する。さらに、スピンドル92の先端に支持板94を固定し、レバーホイスト95を取付け、適度な張力でチェーンを張っておく。尚、円筒部材61、上部カバー71及び弁吊移動工具91を予め組み立てて一体化させておき、分割式取付部材31の上部に円筒部材61等を一括して固定するようにしてもよい。これにより、作業現場での作業性を大きく向上させることができる。   Next, as shown in FIG. 8, the cylindrical member 61 is placed on the upper part of the split mounting member 31, and the large-diameter flange 41 of the split mounting member 31 and the lower flange 62 of the cylindrical member 61 are connected with bolts and nuts 64. By fastening, the split-type attachment member 31 and the cylindrical member 61 are fixed. Further, the upper cover 71 having the spindle 92 passed through the insertion hole 75 is placed on the upper part of the cylindrical member 61, and the upper flange 63 of the cylindrical member 61 and the flange 72 of the upper cover 71 are fastened with bolts and nuts 73. The cylindrical member 61 and the upper cover 71 are fixed. Further, a support plate 94 is fixed to the tip of the spindle 92, a lever hoist 95 is attached, and a chain is stretched with an appropriate tension. The cylindrical member 61, the upper cover 71, and the valve suspension moving tool 91 may be assembled and integrated in advance, and the cylindrical member 61 and the like may be fixed together on the upper part of the split mounting member 31. Thereby, workability | operativity at a work site can be improved significantly.

そして、作業ケース30の内部空間に、空気弁105で内部空間から空気を排出させながら水等の流体を導入して、作業用ケース30の各接続部分から流体の漏洩がないことを確認しつつ、作業用ケース30内の圧力を流体管1、1’の管路内の圧力と略同等に調整する。尚、前述した第2分割体80と分割式取付部材31との固定作業後の漏洩確認を省略して、作業用ケース30全体の接続を完了させた後にのみ各接続部分から流体の漏洩がないことを確認するようにしてもよい。   Then, a fluid such as water is introduced into the internal space of the work case 30 while discharging air from the internal space by the air valve 105, and it is confirmed that there is no fluid leakage from each connection portion of the work case 30. Then, the pressure in the working case 30 is adjusted to be approximately equal to the pressure in the pipes of the fluid pipes 1 and 1 ′. In addition, the leakage check after the fixing work of the second divided body 80 and the split mounting member 31 described above is omitted, and there is no fluid leakage from each connection portion only after the connection of the entire work case 30 is completed. You may make it confirm that.

次に、図9(b)に示すように、作業用ケース30外から固定ボルト52を所定量回転操作して、固定ボルト52の傾斜部53を弁蓋フランジ13から離間させる方向に移動させることで、管路部本体3と弁本体部11と密封状態を緩和させて、管路部本体3と弁本体部11との隙間から管路部本体3内の流体を作業用ケース30内に導く。これにより、管路部本体3内と作業用ケース30内の圧力が同等に調整される。   Next, as shown in FIG. 9 (b), the fixing bolt 52 is rotated by a predetermined amount from outside the work case 30, and the inclined portion 53 of the fixing bolt 52 is moved in the direction of separating from the valve lid flange 13. Thus, the sealed state between the pipe body 3 and the valve body 11 is relaxed, and the fluid in the pipe body 3 is guided into the working case 30 from the gap between the pipe body 3 and the valve body 11. . Thereby, the pressure in the pipe body 3 and the working case 30 are adjusted equally.

そして、固定ボルト52を更に回転操作して、傾斜部53を弁蓋フランジ13から離間させる。その後、弁吊移動工具91のレバーホイスト95を操作してチェーンを徐々に緩めると、スピンドル92は水圧で押上げられて移動し、弁本体部11を作業弁26よりも上側の上部空間Dまで引き上げる。この際、弁本体部11と管路部本体3を密封するパッキンが残置される場合がある。そのパッキンの除去用として、特に図示しないが、分割式取付部材31の筒部40に密封された透明アクリル等製の窓を設け、また、密封状に棒状部材が、作業ケース30外から、作業ケース30内に挿入できるようにして、パッキンを取り外すようにしてもよい。   Then, the fixing bolt 52 is further rotated to separate the inclined portion 53 from the valve lid flange 13. Thereafter, when the lever hoist 95 of the valve suspension moving tool 91 is operated to gradually loosen the chain, the spindle 92 is pushed up by water pressure to move, and the valve body 11 is moved to the upper space D above the work valve 26. Pull up. At this time, a packing for sealing the valve body 11 and the pipe body 3 may be left behind. For removing the packing, although not specifically shown, a window made of transparent acrylic or the like sealed in the cylindrical portion 40 of the split mounting member 31 is provided, and a rod-like member is sealed from the outside of the work case 30 to work. The packing may be removed so that it can be inserted into the case 30.

また、作業弁26を円筒部材61内に進出させることで、作業用ケース30の内部空間を上部空間Dと下部空間Eとに分断し、下部空間Bを密封状に閉塞する。これにより、作業用ケース30の内部空間が上部空間Dと下部空間Eとに分断されることになり、下部空間Eを密封状に保ちつつ、上部空間Dを開放することができるようになる。   Further, by moving the work valve 26 into the cylindrical member 61, the internal space of the work case 30 is divided into the upper space D and the lower space E, and the lower space B is closed in a sealed manner. As a result, the internal space of the working case 30 is divided into the upper space D and the lower space E, and the upper space D can be opened while keeping the lower space E sealed.

そして、図示しない排出バルブを介して、上部空間D内の流体を作業用ケース30外部に排出する。その後、上部カバー71と円筒部材61とを接続するボルト・ナット73を外し、上部カバー71、弁吊移動工具91ともに、弁本体部11を撤去する。   Then, the fluid in the upper space D is discharged to the outside of the working case 30 through a discharge valve (not shown). Thereafter, the bolts and nuts 73 connecting the upper cover 71 and the cylindrical member 61 are removed, and the valve main body 11 is removed together with the upper cover 71 and the valve suspension moving tool 91.

なお、実施例1の管路部フランジ6の形状は、小判形であったが、具体的な構成はこれら実施例に限られるものではない。たとえば、実施例1の分割式取付部材31の封止部36は、管路部フランジ6の形状に合わせて小判形としていたが、図10に示すように、楕円型の管路フランジ102、弁蓋フランジ103を有する仕切弁101の場合には、管路フランジ102、弁蓋フランジ103の形状に合わせて、分割式取付部材107の封止部109の形状も小判形に構成することができる。さらに、小判形、楕円形に限らず、図11の仕切弁111のような略矩形形のフランジ形状115、116にも適用することができる。   In addition, although the shape of the pipe-line part flange 6 of Example 1 was an oval shape, a specific structure is not restricted to these Examples. For example, the sealing portion 36 of the split-type mounting member 31 of the first embodiment has an oval shape in accordance with the shape of the pipe line flange 6, but as shown in FIG. In the case of the gate valve 101 having the lid flange 103, the shape of the sealing portion 109 of the split-type mounting member 107 can be configured in an oval shape in accordance with the shapes of the pipe line flange 102 and the valve lid flange 103. Furthermore, the present invention can be applied not only to the oval shape and the oval shape but also to the substantially rectangular flange shapes 115 and 116 such as the gate valve 111 of FIG.

また、図10のように首部104の長さが短い場合、すなわち管軸A−Aからの管路フランジ102の下面位置の寸法Mがフランジ108、108’の半径寸法Rより小さい場合には、分割式取付部材107は、管路部フランジ102の周方向に4分割の分割体に分割可能に構成することもできる。分割数は、偶数に限らず奇数の分割数にしてもよい。さらに、分割式取付部材107の封止部109の外壁の管軸方向(A−A方向)の幅寸法Nは、仕切弁に面する側のフランジ108とフランジ108’の面間寸法Lより小さく構成することで、首部の長さMが短い場合であっても、本発明の分割式取付部材を適用することができる。このように、分割式取付部材は、種々の弁装置の形状を適合させることができ、本発明の作業用ケースを種々の弁装置に装着することができる。   Further, when the length of the neck 104 is short as shown in FIG. 10, that is, when the dimension M of the lower surface position of the pipe flange 102 from the pipe axis AA is smaller than the radial dimension R of the flanges 108 and 108 ′, The split-type attachment member 107 can also be configured to be split into four split bodies in the circumferential direction of the pipe line flange 102. The number of divisions is not limited to an even number and may be an odd number. Furthermore, the width dimension N in the tube axis direction (AA direction) of the outer wall of the sealing portion 109 of the split mounting member 107 is smaller than the inter-face dimension L between the flange 108 and the flange 108 'facing the gate valve. By configuring, the split mounting member of the present invention can be applied even when the length M of the neck is short. As described above, the split mounting member can adapt the shapes of various valve devices, and the working case of the present invention can be mounted on various valve devices.

実施例2に係る弁体撤去装置及び弁体撤去方法につき、図12及び図13を参照して説明する。実施例2に係る弁体撤去装置及び弁体撤去方法は、図11の仕切弁111と同じ形状の仕切弁であるが、保持手段55を使用しない点で相違する。以下、実施例1の弁体撤去装置及び弁体撤去方法と重複する説明は省略する。   The valve body removal apparatus and the valve body removal method according to the second embodiment will be described with reference to FIGS. 12 and 13. The valve body removal device and the valve body removal method according to the second embodiment are gate valves having the same shape as the gate valve 111 in FIG. 11, but are different in that the holding means 55 is not used. Hereinafter, the description which overlaps with the valve body removal apparatus and valve body removal method of Example 1 is abbreviate | omitted.

図13に示すように、作業用ケース120は、本発明の第1分割体としての分割式取付部材121と、本発明の第2分割体としての円筒部材126、作業弁円筒部127及び上部カバー128とからなる。円筒部材126と作業弁円筒部127と上部カバー128とは一体に接続され、円筒部材126、作業弁円筒部127及び上部カバー128の内部には、連結部材130と弁撤去軸131とが組込まれている。さらに、上部カバーの上には、挿入機132が取付けられる。   As shown in FIG. 13, the working case 120 includes a split mounting member 121 as a first divided body of the present invention, a cylindrical member 126 as a second divided body of the present invention, a work valve cylindrical portion 127, and an upper cover. 128. The cylindrical member 126, the working valve cylindrical portion 127, and the upper cover 128 are integrally connected, and the connecting member 130 and the valve removal shaft 131 are incorporated in the cylindrical member 126, the working valve cylindrical portion 127, and the upper cover 128. ing. Further, an insertion machine 132 is attached on the upper cover.

弁体撤去の手順について説明する。最初に、図12の仕切弁111において、本発明の第1分割体としての分割式取付部材121の分割片の間にパッキン122を介在させて、分割片を流体管1の管軸A−Aに略直交する向きに、管路部フランジ115の外径外側から被せて、ボルト・ナット125により締結する。次に、管路部フランジ部115と弁蓋フランジ116を接続している既設ボルト・ナットを一本ずつまたは所定本数ずつ作業用ボルト123、作業用ナット124に交換する。   The procedure for removing the valve body will be described. First, in the gate valve 111 of FIG. 12, the packing 122 is interposed between the split pieces of the split mounting member 121 as the first split body of the present invention, and the split pieces are connected to the pipe axis AA of the fluid pipe 1. It covers from the outer diameter outer side of the pipe line flange 115 in a direction substantially orthogonal to the bolt and nut 125 and is fastened. Next, the existing bolts and nuts connecting the pipe line flange portion 115 and the valve lid flange 116 are replaced with work bolts 123 and work nuts 124 one by one or a predetermined number.

次いで、図12、図13に示すように、円筒部材126、作業弁円筒部127及び上部カバー128並びに連結部材130と弁撤去軸131とを一体に組立てたものを分割式取付部材121の上に設置し固定する。そして、円筒部材126の窓134から仕切弁111の弁棒部129と連結部材130を連結して、連結部材130を介して仕切弁111の弁蓋136を動かないように押し付ける。さらに、弁蓋136を管路部フランジ115に固定している作業用ナット124を取外す。作業用ナットを124は、長尺に形成されているので、作業者が窓130から作業用ナット124に容易にアクセスすることができ、容易に取外すことができる。   Next, as shown in FIGS. 12 and 13, the cylindrical member 126, the work valve cylindrical portion 127, the upper cover 128, the coupling member 130 and the valve removal shaft 131 are assembled together on the split mounting member 121. Install and fix. Then, the valve rod portion 129 of the gate valve 111 and the connecting member 130 are connected from the window 134 of the cylindrical member 126, and the valve lid 136 of the gate valve 111 is pressed so as not to move via the connecting member 130. Further, the work nut 124 that fixes the valve lid 136 to the pipe line flange 115 is removed. Since the work nut 124 is formed in a long shape, the operator can easily access the work nut 124 from the window 130 and can be easily removed.

次に、窓134を蓋135によって閉塞し、挿入機132を操作して、弁撤去軸131を引上げ、弁体(図示せず)を仕切弁111から撤去することができる。   Next, the window 134 is closed by the lid 135, the inserter 132 is operated, the valve removal shaft 131 is pulled up, and the valve body (not shown) can be removed from the gate valve 111.

次いで、作業弁26によって、作業ケース120内を上部空間P及び下部空間Qに分離したのち、排出バルブ(図示せず)を介して、上部空間P内の流体を作業用ケース30外部に排出する。その後、上部カバー128と作業弁円筒部127とを接続するボルト・ナットを外し、上部カバー128、挿入機132ともに、弁本体部111を撤去する。   Next, after the work case 120 is separated into the upper space P and the lower space Q by the work valve 26, the fluid in the upper space P is discharged to the outside of the work case 30 through a discharge valve (not shown). . Thereafter, the bolts and nuts connecting the upper cover 128 and the work valve cylindrical portion 127 are removed, and the valve main body 111 is removed together with the upper cover 128 and the insertion machine 132.

このように、実施例2の弁体撤去装置及び弁体撤去方法は、保持手段55を使用しないので、作業を簡略できる。   Thus, since the valve body removal apparatus and the valve body removal method of Example 2 do not use the holding means 55, the operation can be simplified.

実施例3に係る弁体撤去装置及び弁体撤去方法につき、図14を参照して説明する。実施例1及び実施例2に係る弁体撤去装置及び弁体撤去方法は、長尺の作業用ナットを使用するものであったが、実施例3に係る弁体撤去装置及び弁体撤去方法は、作業用ナットを使用しない点で、実施例1及び実施例2と相違する。以下、実施例1及び実施例2の弁体撤去装置及び弁体撤去方法と重複する説明は省略する。   A valve body removal apparatus and a valve body removal method according to Example 3 will be described with reference to FIG. Although the valve body removal apparatus and the valve body removal method which concern on Example 1 and Example 2 used a long working nut, the valve body removal apparatus and valve body removal method which concern on Example 3 are This is different from the first and second embodiments in that no working nut is used. Hereinafter, the description which overlaps with the valve body removal apparatus and valve body removal method of Example 1 and Example 2 is abbreviate | omitted.

図14の仕切弁151において、分割式取付部材152の分割片を管路部フランジ153の径方向外側から被せて、ボルト・ナット(図示せず)により分割式取付部材152を一体に組立てる。次に、保持手段の固定ボルト159を回動させて、固定ボルト159を弁蓋フランジ154の上面に当接させて、弁蓋フランジ154を動かないように固定する。また、分割式取付部材152の下部には、管路部フランジ153の下面に接触し、固定する支持部材が設けてあるため、強固に固定される。   In the gate valve 151 of FIG. 14, the divided piece of the split mounting member 152 is covered from the radially outer side of the pipe line flange 153, and the split mounting member 152 is assembled integrally with bolts and nuts (not shown). Next, the fixing bolt 159 of the holding means is rotated to bring the fixing bolt 159 into contact with the upper surface of the valve lid flange 154 so that the valve lid flange 154 is fixed so as not to move. In addition, since a support member that contacts and fixes the lower surface of the pipe line flange 153 is provided at the lower part of the split-type mounting member 152, it is firmly fixed.

次に、管路部フランジ部153と弁蓋フランジ154を接続している既設ボルト・ナット156を一本ずつまたは所定本数ずつ作業用ボルト157に交換する。さらに、管路部本体の首部160に2分割された略小判形の支持部材158を取付け、作用ボルト157の下端を支持する。   Next, the existing bolts and nuts 156 connecting the pipe line flange portion 153 and the valve lid flange 154 are replaced with work bolts 157 one by one or a predetermined number. Further, a substantially oval support member 158 divided into two is attached to the neck portion 160 of the conduit body, and the lower end of the working bolt 157 is supported.

次いで、実施例1の図8、図9と同じように、分割式取付部材152の上に円筒部材61、上部カバー71及び弁吊移動工具91を組立て、実施例1と同じ手順で、弁体を撤去できる。また、この場合、掘削の深さは、流体管半分ぐらいまでとして、支持部材158の底面を掘削地面の間にジャッキなどを入れて、水平を出し、確実に作業用ケースや水などの重量を支持させるようにしている。   Next, as in FIGS. 8 and 9 of the first embodiment, the cylindrical member 61, the upper cover 71 and the valve suspension moving tool 91 are assembled on the split mounting member 152, and the valve body is processed in the same procedure as in the first embodiment. Can be removed. Also, in this case, the depth of excavation should be up to about half of the fluid pipe, with the bottom surface of the support member 158 placed between the excavation ground and leveled to ensure the weight of the work case, water, etc. I try to support it.

実施例3に係る弁体撤去装置及び弁体撤去方法は、作業用ナットを使用せずに弁体を撤去できるので、作業ケース内に設置された作業ナットの取付け、取外し等の手順を省略できるので、作業時間を短縮できる。   Since the valve body removing device and the valve body removing method according to the third embodiment can remove the valve body without using the working nut, the procedure for attaching and removing the working nut installed in the working case can be omitted. Therefore, work time can be shortened.

以上、本発明の実施例を図面により説明してきたが、具体的な構成はこれら実施例に限られるものではなく、本発明の要旨を逸脱しない範囲における変更や追加があっても本発明に含まれる。   Although the embodiments of the present invention have been described with reference to the drawings, the specific configuration is not limited to these embodiments, and modifications and additions within the scope of the present invention are included in the present invention. It is.

たとえば、実施例3の図14においては、管路部本体の首部に2分割された外形小判形の支持部材158を取付け、作業用ボルト157の下端を支持するようにしている。しかし、これに限らず、図15のように、別体の支持部材164を複数、第1分割体163の下端にネジ等で固定してもよい。この場合、支持部材164は、ボルト挿通孔を密封する作業用軸169を併せ持っている。   For example, in FIG. 14 of the third embodiment, an oval-shaped support member 158 divided into two is attached to the neck portion of the pipe section main body so as to support the lower end of the working bolt 157. However, the present invention is not limited to this, and a plurality of separate support members 164 may be fixed to the lower end of the first divided body 163 with screws or the like as shown in FIG. In this case, the support member 164 also has a work shaft 169 that seals the bolt insertion hole.

また、実施例1から実施例3の第1分割体としての分割式取付部材は、管路部フランジ6の周方向に分割されている。しかし、これに限らず、図16のように、分割式取付部材142は、一体に形成された円筒部143と周方向に4分割された押輪144とから構成することもできる。円筒部143の下端の溝部に密封部材147を嵌込み、弁軸の軸線方向から、円筒部143を管路部フランジ145の外周に嵌め込む。次いで、管路部フランジ145の周方向に4分割された押輪144を管路部フランジ145の径方向から円筒部143に組立て、密封部材147を押圧し、円筒部143と押輪144とをボルト149により一体に結合する構成とすることもできる。   Further, the split attachment member as the first split body of the first to third embodiments is divided in the circumferential direction of the pipe line flange 6. However, the present invention is not limited to this, and as shown in FIG. 16, the split mounting member 142 can be configured by a cylindrical portion 143 formed integrally and a push ring 144 divided into four in the circumferential direction. The sealing member 147 is fitted into the groove at the lower end of the cylindrical portion 143, and the cylindrical portion 143 is fitted to the outer periphery of the pipe line flange 145 from the axial direction of the valve shaft. Next, the pusher wheel 144 divided into four in the circumferential direction of the pipe line flange 145 is assembled to the cylindrical part 143 from the radial direction of the pipe line flange 145, the sealing member 147 is pressed, and the cylindrical part 143 and the pusher wheel 144 are connected to the bolt 149. It can also be set as the structure couple | bonded integrally by.

また、本実施例では、密封部材として、パッキン等を使用しているが、これに限らず、液状パッキンを使用してもよい。   In this embodiment, packing or the like is used as the sealing member. However, the present invention is not limited to this, and liquid packing may be used.

また、本発明では弁装置は、仕切弁としているが、バタフライ弁、切換弁、ボールバルブ、プラグなどでも良い。   In the present invention, the valve device is a gate valve, but may be a butterfly valve, a switching valve, a ball valve, a plug, or the like.

1、1’ 流体管
2 仕切弁(弁装置)
3 管路部本体
4 管部
5 首部
6 管路部フランジ(第1フランジ)
11 弁本体部
13 弁蓋フランジ(第2フランジ)
22 既設ボルト・ナット
23、123 作業用ボルト(締結部材)
24 ボルト挿通孔(挿通孔)
25、124 作業用ナット(締結部材)
30、120 作業用ケース
31 分割式取付部材(第1分割体)
36、109 封止部
61 円筒部材(第2分割体)
71 上部カバー(第2分割体)
101、111 仕切弁
102、115 管路部フランジ(第1フランジ)
103、116 弁蓋フランジ(第2フランジ)
107、117 分割式取付部材(第1分割体)
120 作業用ケース
121、142 分割式取付部材(第1分割体)
123 作業用ボルト(締結部材)
124 作業用ナット(締結部材)
141、151、161 仕切弁
145、153、166 管路部フランジ(第1フランジ)
146、154、167 弁蓋フランジ(第2フランジ)
152 分割式取付部材(第1分割体)
163 第1分割体
1, 1 'Fluid pipe 2 Gate valve (valve device)
3 Pipe section body 4 Pipe section 5 Neck section 6 Pipe section flange (first flange)
11 Valve body 13 Valve lid flange (second flange)
22 Existing bolts and nuts 23, 123 Work bolts (fastening members)
24 Bolt insertion hole (insertion hole)
25, 124 Work nut (fastening member)
30, 120 Working case 31 Split-type mounting member (first split body)
36, 109 Sealing portion 61 Cylindrical member (second divided body)
71 Upper cover (second divided body)
101, 111 Gate valve 102, 115 Pipe line flange (first flange)
103, 116 Valve lid flange (second flange)
107, 117 Split-type mounting member (first split body)
120 Working cases 121, 142 Split-type mounting member (first split body)
123 Working bolt (fastening member)
124 Working nut (fastening member)
141, 151, 161 Gate valve 145, 153, 166 Pipe line flange (first flange)
146, 154, 167 Valve lid flange (second flange)
152 Split-type mounting member (first split body)
163 1st division body

Claims (7)

流体管に連結される管路部本体、及び該管路部本体の内部を閉塞可能な弁本体部を備える弁装置の前記弁本体部を、前記管路部本体から不断流状態で撤去するための弁体撤去装置において、
前記弁体撤去装置は、前記弁本体部を密封状態に囲う作業用ケースと、前記作業用ケースの内部空間を仕切る作業弁と、前記弁本体部を前記作業用ケース内で移動を可能とする弁移動手段と、前記管路部本体に設けられた第1フランジ及び前記弁本体部に設けられた第2フランジを締結する締結部材と、前記作業用ケースを支持するとともに高さ調整を行うサポートと、を備え、
前記作業用ケースは、前記締結部材が挿通される前記第1フランジの挿通孔の径方向外側を封止する封止部を有する第1分割体、及び前記弁本体部を囲う第2分割体から構成され、前記第1分割体は、前記第1フランジの周方向に少なくとも2分割されていることを特徴とする弁体撤去装置。
In order to remove the valve main body portion of the valve device including a pipe body connected to the fluid pipe and a valve main body capable of closing the inside of the pipe main body from the pipe main body in an uninterrupted state. In the valve body removal device of
The valve body removal device enables a work case that encloses the valve body part in a sealed state, a work valve that partitions an internal space of the work case, and the valve body part can be moved in the work case. A valve moving means, a first flange provided in the pipe body and a fastening member for fastening the second flange provided in the valve body, and a support for supporting the work case and adjusting the height And comprising
The working case includes a first divided body that has a sealing portion that seals a radially outer side of the insertion hole of the first flange through which the fastening member is inserted, and a second divided body that surrounds the valve main body portion. The valve body removing device according to claim 1, wherein the first divided body is divided into at least two in the circumferential direction of the first flange.
前記封止部は、前記第1フランジの外周面あるいは軸方向下端面を封止することを特徴とする請求項1に記載の弁体撤去装置。   The said sealing part seals the outer peripheral surface or axial direction lower end surface of a said 1st flange, The valve body removal apparatus of Claim 1 characterized by the above-mentioned. 前記第1分割体は、短軸及び長軸を有する形状の前記第1フランジの周方向に少なくとも2分割されることを特徴とする請求項1または2に記載の弁体撤去装置。   3. The valve body removing device according to claim 1, wherein the first divided body is divided into at least two parts in a circumferential direction of the first flange having a shape having a short axis and a long axis. 前記作業用ケースは、該作業用ケースの外部から操作可能であるとともに前記第2フランジを前記第1フランジ側に保持する保持手段を備えることを特徴とする請求項1ないし3のいずれかに記載の弁体撤去装置。   The said working case is provided with the holding means which can be operated from the exterior of this working case, and hold | maintains the said 2nd flange to the said 1st flange side. Valve body removal device. 前記第1分割体は、前記第2フランジとの間に隙間を有する筒部を備えることを特徴とする請求項1ないし4のいずれかに記載の弁体撤去装置。   The said 1st division body is provided with the cylinder part which has a clearance gap between the said 2nd flanges, The valve body removal apparatus in any one of Claim 1 thru | or 4 characterized by the above-mentioned. 前記第1分割体は、前記第1フランジの少なくとも短軸方向に沿って2分割されることを特徴とする請求項5に記載の弁体撤去装置。   The said 1st division body is divided into 2 along the at least short-axis direction of the said 1st flange, The valve body removal apparatus of Claim 5 characterized by the above-mentioned. 流体管に連結される管路部本体、該管路部本体の内部を閉塞可能な弁本体部を備える弁装置の前記弁本体部を、前記管路部本体から不断流状態で撤去するための弁体撤去方法において、
前記管路部本体に設けられた第1フランジ及び前記弁本体部に設けられた第2フランジを接続するボルト、ナットを作業用ボルト、ナットに交換する工程と、
前記第1フランジの外周面あるいは軸方向下端面を、作業用ケースを構成し前記第1フランジの周方向に少なくとも2分割される第1分割体で封止するとともに、サポートによって前記作業用ケースを支持するとともに高さ調整を行い、前記弁本体部を、前記作業用ケースを構成する第2分割体で密封状態に囲う工程と、
前記作業用ケース内で前記管路部本体から前記弁本体部を取り外す工程と、
前記作業用ケース内に備えられた作業弁によって、前記作業用ケース内における前記弁本体部よりも前記管路部本体側を密封状態に閉塞する工程と、
前記弁本体部を取り出す工程と、
を備えることを特徴とする弁体撤去方法。
A pipe body connected to a fluid pipe, and the valve main body of a valve device including a valve main body capable of closing the inside of the pipe main body for removing the valve body from the pipe body in an uninterrupted state. In the valve body removal method,
A bolt for connecting the first flange provided in the pipe body and the second flange provided in the valve body, and a step of replacing the nut with a working bolt and nut;
The outer peripheral surface or the axial lower end surface of the first flange is sealed with a first divided body that constitutes a working case and is divided into at least two parts in the circumferential direction of the first flange, and the working case is supported by a support. Supporting and adjusting the height, and enclosing the valve body in a sealed state with a second divided body constituting the working case;
Removing the valve body from the conduit body in the working case;
The process valve provided in the working case closes the conduit portion main body side in a sealed state rather than the valve main body portion in the working case;
Removing the valve body,
A valve body removal method comprising:
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