JP6571928B2 - Valve body removal device - Google Patents

Valve body removal device Download PDF

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JP6571928B2
JP6571928B2 JP2014233104A JP2014233104A JP6571928B2 JP 6571928 B2 JP6571928 B2 JP 6571928B2 JP 2014233104 A JP2014233104 A JP 2014233104A JP 2014233104 A JP2014233104 A JP 2014233104A JP 6571928 B2 JP6571928 B2 JP 6571928B2
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valve
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JP2016095019A (en
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星野 洋一郎
洋一郎 星野
正喜 星野
正喜 星野
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Cosmo Koki Co Ltd
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Description

本発明は、既設流体管に連結された弁装置の弁体を不断流状態で撤去する弁体撤去装置に関する。   The present invention relates to a valve body removing device that removes a valve body of a valve device connected to an existing fluid pipe in an uninterrupted state.

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。このような弁装置は、既設流体管に接続される管路部本体と、弁体や操作軸等からなる弁本体部とから成り、弁本体部が経年劣化した場合等には、弁装置を流体管路としてのみ使用するため、または将来、弁装置として再利用するために、管路部本体を残して弁本体部のみを撤去する撤去工事が行われている。   The existing fluid pipe such as a water main pipe is provided with a valve device such as a gate valve so that the fluid conduit of the existing fluid pipe can be shut off. Such a valve device is composed of a conduit main body connected to an existing fluid pipe and a valve main body composed of a valve body, an operating shaft, etc., and when the valve main body has deteriorated over time, the valve device is In order to use it only as a fluid pipe line, or to reuse it as a valve device in the future, a removal work for removing only the valve body part while leaving the pipe part body has been performed.

このような工法として、埋設地盤を掘削し露出した管路部本体の首部のフランジに対して、2つの分割体を周方向から挟み込むように固定して環状の下側取付け枠材(取付部材)を形成し、その下側取付け枠材に対して上側取付け枠材、作業用開閉弁、及び昇降搬送手段(弁移動手段)を備えた作業ハウジングを接続して管路部本体の弁本体部側を密封状に囲う作業用ケースを形成し、その作業用ケース内で昇降搬送手段を操作して弁本体部を管路部本体から撤去するものがある(例えば、特許文献1参照)。   As such a construction method, an annular lower mounting frame member (mounting member) is fixed by sandwiching the two divided bodies from the circumferential direction with respect to the flange of the neck portion of the pipe body exposed by excavating the buried ground. And connecting the work housing provided with the upper mounting frame material, the working on-off valve, and the lifting and lowering conveying means (valve moving means) to the lower mounting frame material, the valve main body side of the conduit main body Is formed in a sealed manner, and the valve body is removed from the conduit body by operating the lifting and lowering conveying means in the working case (see, for example, Patent Document 1).

特開2014−29195号公報(第11乃至13頁、第8図)JP 2014-29195 A (pages 11 to 13 and FIG. 8)

特許文献1のような弁体撤去装置にあっては、クレーン等を用いて作業用ケースを構成する各種部材を地上から管路部本体の首部のフランジまで吊り下げて移動させる必要がある。特に、作業用ケースの土台となる下側取付け部材にあっては、2つの分割体を管路部本体の首部のフランジまで吊り下げ、両分割体側を吊り下げた状態のまま、該両分割体を管路部本体のフランジに対して周方向から挟み込んで接続されることにより形成されている。しかしながら、両分割体を吊り下げた状態では該両分割体が揺れてしまうため、各分割体とフランジとの位置合わせが難しく、管路部本体のフランジに対して下側取付け部材を密封状に取付ける作業が煩雑であるという問題があった。   In the valve body removal device as in Patent Document 1, it is necessary to suspend and move various members constituting the work case from the ground to the flange of the neck portion of the pipe section body using a crane or the like. In particular, in the lower mounting member that is the base of the work case, the two divided bodies are suspended to the flange of the neck portion of the pipe section main body, and the both divided bodies are left suspended. Is sandwiched and connected to the flange of the pipe section main body from the circumferential direction. However, in the state where both the divided bodies are suspended, the two divided bodies are shaken. Therefore, it is difficult to align the respective divided bodies and the flanges, and the lower mounting member is hermetically sealed with respect to the flange of the pipe body. There was a problem that the work of attaching was complicated.

本発明は、このような問題点に着目してなされたもので、取付部材の密封取付け作業を容易に行うことができる弁体撤去装置を提供することを目的とする。   The present invention has been made paying attention to such a problem, and an object of the present invention is to provide a valve body removal device capable of easily performing a hermetically attaching operation of an attaching member.

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作業弁及び弁移動手段を用いて不断流状態で撤去するための弁体撤去装置であって、
前記管路部本体を構成する首部側を囲う作業用ケースと、前記作業用ケースを前記首部に密封状態に固定するための複数の分割体から成る取付部材と、前記複数の分割体同士の接続位置に前記分割体を案内する案内手段と、を備えていることを特徴としている。
この特徴によれば、各分割体が案内手段により分割体同士の接続位置に案内され、その接続位置にて各分割体同士が接続されることにより、管路部本体の首部に対する取付部材の密封取付け作業を容易に行うことができる。
In order to solve the above problems, the valve body removal device of the present invention is:
For removing the valve main body of a valve device having a pipe main body connected to a fluid pipe and a valve main body capable of closing the pipe main body in an uninterrupted state using a working valve and a valve moving means. A valve body removal device,
A working case that surrounds the neck side that constitutes the conduit body, a mounting member that includes a plurality of divided bodies for fixing the working case to the neck portion in a sealed state, and a connection between the plurality of divided bodies Guiding means for guiding the divided body at a position is provided.
According to this feature, each divided body is guided to the connection position between the divided bodies by the guiding means, and the divided bodies are connected to each other at the connection position, so that the attachment member is sealed to the neck portion of the pipe body. Installation work can be performed easily.

前記案内手段は、前記複数の分割体を移動可能に一体に保持できることを特徴としている。
この特徴によれば、各分割体を保持した状態で地上から首部まで各分割体を一体に吊り下げ移動させることができるため、管路部本体の首部に対する取付部材の設置作業を容易に行うことができる。
The guide means is characterized in that the plurality of divided bodies can be held integrally so as to be movable.
According to this feature, since each divided body can be suspended and moved from the ground to the neck while holding each divided body, the installation work of the mounting member to the neck portion of the conduit section body can be easily performed. Can do.

前記案内手段は、前記複数の分割体を前記接続位置に誘導する案内路を備えていることを特徴としている。
この特徴によれば、案内路に沿って各分割体同士を接続位置に誘導できるため、取付部材の設置をより正確に行うことができる。
The guide means includes a guide path for guiding the plurality of divided bodies to the connection position.
According to this feature, since each divided body can be guided to the connection position along the guide path, the mounting member can be installed more accurately.

前記案内手段は、前記複数の分割体を載置可能であり、該複数の分割体の前記接続位置への移動を円滑にする移動円滑部を備えていることを特徴としている。
この特徴によれば、各分割体を案内手段に載置して支持でき、且つその各分割体が移動円滑部により接続位置に対して円滑に誘導されるため、管路部本体の首部と取付部材との芯出し作業が極めて容易である。
The guide means is characterized in that the plurality of divided bodies can be placed and includes a moving smoothing portion that smoothly moves the plurality of divided bodies to the connection position.
According to this feature, each divided body can be placed on and supported by the guide means, and each divided body is smoothly guided to the connection position by the moving smooth portion, so that it can be attached to the neck portion of the pipe body. The centering operation with the member is extremely easy.

前記案内手段は、前記各分割体にそれぞれ設けられ互いに係合可能な係合部を有していることを特徴としている。
この特徴によれば、各分割体にそれぞれ設けられた係合部を係合させることにより、各分割体を接続位置に案内できる。
The guide means includes engaging portions that are provided in the respective divided bodies and engageable with each other.
According to this feature, each divided body can be guided to the connection position by engaging the engaging portions provided in each divided body.

実施例における埋設された管路構成部を示す側面図である。It is a side view which shows the pipe line structure part embed | buried in an Example. 仕切弁装置に弁体撤去装置を組み付けた態様を示す一部正面断面図である。It is a partial front sectional view which shows the aspect which assembled | attached the valve body removal apparatus with the gate valve apparatus. 仕切弁装置において作業用ボルト及び作業用ナットに交換した状態を示す側面図である。It is a side view which shows the state exchanged to the volt | bolt for work and the nut for work in the gate valve apparatus. (a)は、首部まで分割構造体を吊り下げ移動させた状態を示す上面図であり、(b)は、同じく一部正面断面図である。(A) is a top view which shows the state which suspended and moved the division | segmentation structure to the neck part, (b) is a partial front sectional view similarly. (a)は、分割構造体同士を近接させた状態を示す上面図であり、(b)は、同じく一部正面断面図である。(A) is a top view which shows the state which made the divided structures adjoin, (b) is a partial front sectional view similarly. 分割構造体同士を接合させた状態を示す上面図である。It is a top view which shows the state which joined the divided structures. 分割構造体同士を接合させた状態を示す一部正面断面図である。It is a partial front sectional view showing the state where split structures were joined. 分割式取付部材の流体圧試験を行う態様を示す一部側断面図である。It is a partial sectional side view which shows the aspect which performs the fluid pressure test of a division | segmentation type attachment member. 弁体撤去装置により既存の弁本体部を取外した状態を示す一部正面断面図である。It is a partial front sectional view which shows the state which removed the existing valve main-body part with the valve body removal apparatus. 新規の弁本体部に交換する態様を示す一部正面断面図である。It is a partial front sectional view which shows the aspect replaced with a new valve main-body part. 案内手段の変形例を示す一部正面断面図である。It is a partial front sectional view showing a modification of the guide means. (a)は、案内手段の変形例を示す上面図であり、(b)は、同じく一部側断面図である。(A) is a top view which shows the modification of a guidance means, (b) is a partial sectional side view similarly.

本発明に係る弁体撤去装置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 which concerns 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12を参照して説明する。以下、図2の画面手前側を弁体撤去装置の正面側(前方側)として説明する。   The valve body removal apparatus according to the embodiment will be described with reference to FIGS. Hereinafter, the front side of the screen in FIG. 2 will be described as the front side (front side) of the valve body removal device.

図1に示すように、本実施例において、既設の流体管2,2’に流体管路を遮断可能な仕切弁装置3(弁装置)が連結されている。流体管2,2’及び仕切弁装置3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2,2’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。さらに尚、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。   As shown in FIG. 1, in this embodiment, a gate valve device 3 (valve device) capable of blocking a fluid pipe line is connected to existing fluid pipes 2 and 2 '. The fluid pipes 2 and 2 ′ and the gate valve device 3 are made of, for example, ductile cast iron for waterworks embedded in the ground, and the fluid pipes 2 and 2 ′ are formed in a substantially circular shape in cross section and have an inner 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に示すように、仕切弁装置3は、管路部本体4と弁本体部11とから構成されている。管路部本体4は、流体管2,2’に連通する管部5と、管部5に一体に形成されたフランジ部9、9’と、管部5の管軸と異なる方向に突出された筒状の首部8と、から構成されている。首部8は、管部5から上方に延びる延設管部6と、延設管部6の上端に設けられた管路部フランジ7と、から成る。   As shown in FIG. 1, the gate valve device 3 includes a pipe body 4 and a valve body 11. The pipe part main body 4 protrudes in a direction different from the pipe axis of the pipe part 5, the pipe part 5 communicating with the fluid pipes 2, 2 ′, flange parts 9 and 9 ′ formed integrally with the pipe part 5, and the pipe part 5. And a cylindrical neck portion 8. The neck portion 8 includes an extended pipe portion 6 that extends upward from the pipe portion 5, and a pipe line flange 7 provided at the upper end of the extended pipe portion 6.

弁本体部11は、管路部本体4を閉塞可能な弁体12(図9参照)と、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、仕切弁装置3を外部から開閉操作するための操作部15と、から構成され、操作部15は弁蓋14との間をシールするためのパッキン(図示略)を介して着脱可能に接合されている。また、管路部本体4と弁本体部11とは、管路部本体4の管路部フランジ7と弁蓋フランジ13とをシールするためのガスケットリング(図示略)を介して、ボルト・ナット20,20,…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 conduit body 4, a valve lid flange 13, a valve lid 14 formed integrally with the valve lid flange 13, The operation unit 15 is protruded from the upper surface and is used to open and close the gate valve device 3 from the outside. The operation unit 15 is attached / detached via a packing (not shown) for sealing the valve lid 14. It is possible to join. Further, the pipe body 4 and the valve body 11 are bolts and nuts via gasket rings (not shown) for sealing the pipe flange 7 and the valve lid flange 13 of the pipe body 4. .. Are detachably joined by 20, 20,.

また、仕切弁装置3と流体管2,2’とは、接続管16,16’を介して接続されている。接続管16,16’は、長手方向一端にフランジ部17,17’、他端に受口部18,18’をそれぞれ備えており、これら接続管16,16’のフランジ部17,17’と仕切弁装置3の両端部のフランジ部9,9’とが、パッキン(図示略)を介して密封状に接合されてボルト・ナット20,20,…で締結されている。流体管2,2’は、端部に固定される押輪19,19’により、接続管16,16’の受口部18,18’にパッキン(図示略)を介して密封状に接合されている。尚、流体管2,2’と仕切弁装置3における管路部本体4と接続管16,16’及び押輪19,19’とは、流体管路を構成しており、本実施例では、これらを総称して管路構成部と定義する。また、本実施例では、管路構成部を構成する部材同士は、フランジによる接合、受口と挿口による接合及び押輪を用いた接合であるが、溶接やロックリングとシールを用いる耐震構造の接合などでもよい。尚、管路構成部を構成する部材は、必ずしも本実施例に限られず、例えば、管路部本体4と流体管2,2’とが直接接続されていてもよい。   The gate valve device 3 and the fluid pipes 2 and 2 'are connected via connection pipes 16 and 16'. The connecting pipes 16 and 16 'are respectively provided with flange portions 17 and 17' at one end in the longitudinal direction, and receiving portions 18 and 18 'at the other end, and the flange portions 17 and 17' of the connecting pipes 16 and 16 ' The flange portions 9 and 9 'at both ends of the gate valve device 3 are joined together in a sealed manner via packing (not shown) and fastened with bolts, nuts 20, 20,. The fluid pipes 2 and 2 ′ are joined to the receiving portions 18 and 18 ′ of the connection pipes 16 and 16 ′ in a sealed manner via packing (not shown) by push wheels 19 and 19 ′ fixed to the ends. Yes. The fluid pipes 2 and 2 ', the pipe body 4 in the gate valve device 3, the connecting pipes 16 and 16', and the push wheels 19 and 19 'constitute a fluid pipe. Are collectively defined as a pipeline component. Further, in this embodiment, the members constituting the pipe line constituting portion are joined by a flange, joined by a receiving port and an inserted port, and joined using a push ring. However, welding or a seismic structure using a lock ring and a seal is used. Bonding or the like may be used. In addition, the member which comprises a pipe line structure part is not necessarily restricted to a present Example, For example, the pipe part main body 4 and the fluid pipes 2 and 2 'may be directly connected.

図2に示されるように、弁体撤去装置1は、弁本体部11を管路部本体4から撤去するものであり、仕切弁装置3の一部を密封状に囲う作業用ケース21と、作業用ケース21内に備えられるとともに作業用ケース21の外部からの操作により作業用ケース21の内部空間を密封状に仕切ることが可能な作業弁22と、弁本体部11を作業用ケース21内で移動を可能とする弁吊移動工具33(弁移動手段)と、作業用ケース21を下方側から支持する支持装置43,43’(図3参照)と、後述する分割構造体24,25を接続位置に案内する案内手段と、から構成されている。尚、案内手段については後述にて詳しく説明する。   As shown in FIG. 2, the valve body removal device 1 removes the valve main body portion 11 from the pipe portion main body 4, and a working case 21 that encloses a part of the gate valve device 3 in a sealed manner, A working valve 22 provided in the working case 21 and capable of partitioning the internal space of the working case 21 in a sealed manner by an operation from the outside of the working case 21, and the valve body 11 within the working case 21 A valve suspension moving tool 33 (valve moving means) that enables movement, a support device 43, 43 ′ (see FIG. 3) for supporting the work case 21 from the lower side, and divided structures 24, 25 described later. And guiding means for guiding to the connection position. The guidance means will be described in detail later.

作業用ケース21は、分割式取付部材23と、合いフランジ26と、作業弁装置27と、円筒部材28と、上蓋29と、から主に構成される。分割式取付部材23のフランジ部31の上部には、前記作業弁22を備えた筐体である作業弁装置27が、合いフランジ26を介して接続されており、作業弁装置27の上側のフランジには、上端に上蓋29が接続された円筒部材28が接続されている。これら作業用ケース21を構成する各種部材同士は、パッキンを介して密封状に接合されている。尚、作業用ケース21は、断面形状が略円筒形状を成していることが望ましいが、例えば、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。   The work case 21 is mainly composed of a split attachment member 23, a mating flange 26, a work valve device 27, a cylindrical member 28, and an upper lid 29. A work valve device 27, which is a housing provided with the work valve 22, is connected to the upper portion of the flange portion 31 of the split mounting member 23 via a mating flange 26, and an upper flange of the work valve device 27. A cylindrical member 28 having an upper lid 29 connected to the upper end is connected to the upper end. Various members constituting the working case 21 are joined in a sealed manner via packing. The work case 21 preferably has a substantially cylindrical cross-sectional shape, but may be a cylindrical member having a substantially oval, substantially elliptical, or substantially rectangular cross-sectional shape, for example.

また、図4に示されるように、分割式取付部材23は、首部8の周方向に2分割された分割構造体24,25から成る。図4(b)に示されるように、前述した分割構造体24,25は、それぞれの接合端部より離れた位置に板状の突出片52,52及び突出片52’,52’がそれぞれ形成されており、対向し合う突出片52,52’の底部には、互いに対向して延びる板部53,53’がそれぞれ設けられている。板部53の先端部54と板部53’に設けられた凹部55とは互いに係合可能となっている。   As shown in FIG. 4, the split attachment member 23 includes split structures 24 and 25 that are split into two in the circumferential direction of the neck portion 8. As shown in FIG. 4B, the divided structures 24 and 25 described above are formed with plate-like projecting pieces 52 and 52 and projecting pieces 52 ′ and 52 ′, respectively, at positions separated from the respective joint ends. In addition, plate portions 53 and 53 ′ extending opposite to each other are provided at the bottoms of the protruding pieces 52 and 52 ′ that face each other. The front end portion 54 of the plate portion 53 and the concave portion 55 provided in the plate portion 53 'can be engaged with each other.

また、図6に示されるように、一方の分割構造体24は、分割式取付部材23のフランジ部31よりも内側に環状部56を備え、環状部56には内周面に雌ネジ部を有した非貫通孔46,46が形成されている。また、同様に他方の分割構造体25は環状部56’を備え、環状部56’には非貫通孔46’,46’が形成されている。これら非貫通孔46,46’には、分割構造体24,25に対して後述する補助プレート47,47を取付け、且つ分割構造体24,25を吊り下げるためのアイボルト49をそれぞれ螺挿することができるようになっている(図4参照)。   As shown in FIG. 6, one split structure 24 includes an annular portion 56 inside the flange portion 31 of the split mounting member 23, and the annular portion 56 has a female screw portion on the inner peripheral surface. The non-through holes 46 and 46 are formed. Similarly, the other divided structure 25 includes an annular portion 56 ′, and non-through holes 46 ′ and 46 ′ are formed in the annular portion 56 ′. In these non-through holes 46 and 46 ′, auxiliary plates 47 and 47, which will be described later, are attached to the divided structures 24 and 25, and eyebolts 49 for hanging the divided structures 24 and 25 are respectively screwed. (See FIG. 4).

図7の部分拡大部に示されるように、分割式取付部材23は、分割構造体24,25が首部8に対して周方向から近接されることにより、分割構造体24,25の内周面にそれぞれ設けられた密封部材30が管路部フランジ7に圧接されて密封状に取付けられている。尚、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してもよい。   As shown in the partially enlarged portion of FIG. 7, the split-type mounting member 23 has the inner peripheral surfaces of the split structures 24, 25 when the split structures 24, 25 are brought closer to the neck 8 from the circumferential direction. The sealing member 30 provided in each is pressed against the pipe line flange 7 and attached in a sealed manner. In addition, as the sealing member, a round rubber packing having a circular cross section, a substantially C-shaped or rectangular shape, or a rubber packing with a lip may be used.

また、分割式取付部材23における弁蓋フランジ13の上面に対応する位置には、外周側から内周側に連通するネジ溝を有する連通孔57が設けられており、該連通孔57には、フランジ上部固定ボルト58が密封状に螺挿されている。また、分割式取付部材23における管路部フランジ7の下面と対応する位置には、連通孔57’が設けられており、該連通孔57’には、フランジ下部固定ボルト59が密封状に螺挿されている。なお、連通孔57’及びフランジ下部固定ボルト59は設けなくてもよい。   In addition, a communication hole 57 having a thread groove communicating from the outer peripheral side to the inner peripheral side is provided at a position corresponding to the upper surface of the valve lid flange 13 in the split mounting member 23. A flange upper fixing bolt 58 is screwed in a sealing manner. In addition, a communication hole 57 ′ is provided at a position corresponding to the lower surface of the pipe line flange 7 in the split mounting member 23, and a flange lower fixing bolt 59 is screwed into the communication hole 57 ′ in a sealing manner. It is inserted. The communication hole 57 'and the flange lower fixing bolt 59 may not be provided.

また、図2に示されるように、上蓋29の中央部には、上面側から下面側に連通する挿入孔32が形成されている。この挿入孔32には、弁本体部11を管路部本体4から引き上げて取り外すための弁吊ロッド34が挿入可能になっており、上蓋29と弁吊ロッド34との間には、図示しないシール材が介在されることで、作業用ケース21内が密閉される。   As shown in FIG. 2, an insertion hole 32 that communicates from the upper surface side to the lower surface side is formed in the central portion of the upper lid 29. A valve suspension rod 34 for pulling up and removing the valve body 11 from the conduit body 4 can be inserted into the insertion hole 32, and is not shown between the upper lid 29 and the valve suspension rod 34. By interposing the sealing material, the inside of the work case 21 is sealed.

弁吊移動工具33は、弁吊ロッド34と、弁吊ロッド34の上端に固定された上部吊り金具35と、上部吊り金具35及び前記作業用ケース21の円筒部材28に固定されるレバーホイスト36,36と、から成る。弁蓋フランジ13(図3参照)を管路部本体4から取外し、作業用ケース21内への流体圧を利用し、且つレバーホイスト36,36を緩めるように操作することで、徐々に弁吊ロッド34を上方に移動させて、弁本体部11を引き上げることが可能となっている。尚、流体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、弁吊ロッド34の長さは、後述するように、作業用ケース21内に最も進出された際に、弁吊ロッド34の先端が弁本体部11の操作部15の上端付近に達する一方で、弁吊ロッド34で弁本体部11を管路部本体4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22よりも上部に達するように調整されている。   The valve suspension moving tool 33 includes a valve suspension rod 34, an upper suspension fitting 35 fixed to the upper end of the valve suspension rod 34, and a lever hoist 36 fixed to the upper suspension fitting 35 and the cylindrical member 28 of the working case 21. , 36. The valve lid flange 13 (see FIG. 3) is removed from the pipe body 4 and the valve hoist is gradually lifted by operating the fluid pressure into the working case 21 and loosening the lever hoists 36, 36. The valve body 11 can be lifted by moving the rod 34 upward. In addition, when the lifting with the fluid pressure is insufficient, a lifting device such as a crane may be used. Further, as will be described later, the length of the valve suspension rod 34 is such that the tip of the valve suspension rod 34 reaches the vicinity of the upper end of the operation portion 15 of the valve main body portion 11 when the valve suspension rod 34 is most advanced into the work case 21. Thus, the lower end of the valve main body 11 is adjusted so as to reach the upper part of the work valve 22 when the valve main body 11 is moved back most to be separated from the conduit main body 4 by the valve suspension rod 34. .

図2及び図3に示されるように、支持装置43,43’は、接続管16,16’にそれぞれ配置されている。支持装置43は、接続管16の外周面を周方向に跨ぐ脚部44と、脚部44上部に設けられた一対の支持部45,45と、から主に構成されており、支持部45,45は、図示しない高さ調整機構によりそれぞれ上下に移動可能となっている。尚、支持装置43’は、支持装置43と同一構成であるため、支持装置43’の説明を省略する。   As shown in FIGS. 2 and 3, the support devices 43 and 43 ′ are disposed on the connection pipes 16 and 16 ′, respectively. The support device 43 mainly includes a leg portion 44 straddling the outer peripheral surface of the connecting pipe 16 in the circumferential direction and a pair of support portions 45, 45 provided on the upper portion of the leg portion 44. 45 can be moved up and down by a height adjusting mechanism (not shown). Since the support device 43 ′ has the same configuration as the support device 43, description of the support device 43 ′ is omitted.

次に、弁体撤去装置1を用いて弁本体部11を撤去し、後に新規の弁本体部11’に交換する工程について説明する。   Next, a process of removing the valve body 11 using the valve body removal apparatus 1 and replacing it with a new valve body 11 'later will be described.

先ず、図1に示されるように、前記管路構成部の管軸中心近傍まで地盤を掘削する。その後、露出した仕切弁装置3やその周辺の部材を清掃する。尚、仕切弁装置3全体が露出するまで掘削して弁体撤去装置1の取付け作業を広いスペースで行うようにしてもよい。   First, as shown in FIG. 1, the ground is excavated to the vicinity of the center of the pipe axis of the pipe line constituting part. Thereafter, the exposed gate valve device 3 and its surrounding members are cleaned. In addition, it excavates until the whole gate valve apparatus 3 is exposed, and you may make it perform the attachment operation | work of the valve body removal apparatus 1 in a wide space.

続いて図3に示されるように、管路部本体4と弁本体部11とを締結するボルト・ナット20を、作業用ボルト37,37,…及び長尺の作業用ナット38,38,…に付け替えるとともに、弁本体部11のキャップ39(図1参照)を前述した弁吊ロッド34の先端に係合可能なアダプター40に交換する。尚、作業用ボルト37,37,…には、管路部フランジ7のボルト孔(図示略)を密封するためのパッキンが組み込まれている。さらに尚、管路部フランジ7のボルト孔は、パッキンの代わりにシールワッシャーを介在させて密封するようにしてもよい。   Subsequently, as shown in FIG. 3, bolts and nuts 20 for fastening the pipe body 4 and the valve body 11 are replaced with working bolts 37, 37,... And long working nuts 38, 38,. The cap 39 (see FIG. 1) of the valve main body 11 is replaced with an adapter 40 that can be engaged with the tip of the valve suspension rod 34 described above. In addition, packing for sealing the bolt hole (not shown) of the pipe line part flange 7 is incorporated in the working bolts 37, 37,. Furthermore, the bolt hole of the pipe line flange 7 may be sealed with a seal washer instead of packing.

このように、長尺の作業用ナット38に交換することで、分割式取付部材23のフランジ部31側から作業用ナット38にアクセスでき、分解組立て作業が容易となる。尚、更に長尺の作業用ナットを用いて分割式取付部材23のフランジ部31側から突出させるようにしてもよい。   In this way, by replacing the long work nut 38, the work nut 38 can be accessed from the flange portion 31 side of the split mounting member 23, and disassembly and assembly work is facilitated. In addition, you may make it protrude from the flange part 31 side of the split-type attachment member 23 using a still longer working nut.

また、管路部本体4と接続管16,16’とを締結するボルト・ナット20,20,…の一部を長ねじボルト42,42に付け替えるとともに、接続管16,16’の外周面上に支持装置43,43’を取り付ける。支持装置43,43’を接続管16,16’に取り付ける際には、支持装置43,43’の各脚部44,44の各周方向両端部を、長ねじボルト42,42の上面に載置させる。これにより、支持装置43,43’が接続管16,16’の周方向に滑って回転移動することが防止される。   Further, a part of the bolts and nuts 20, 20,... That fasten the pipe body 4 and the connection pipes 16, 16 ′ are replaced with long screw bolts 42, 42, and on the outer peripheral surface of the connection pipes 16, 16 ′. The support devices 43 and 43 ′ are attached to the base plate. When the support devices 43 and 43 ′ are attached to the connection pipes 16 and 16 ′, both end portions in the circumferential direction of the leg portions 44 and 44 of the support devices 43 and 43 ′ are mounted on the upper surfaces of the long screw bolts 42 and 42, respectively. Let me put it. This prevents the support devices 43 and 43 'from sliding and rotating in the circumferential direction of the connection pipes 16 and 16'.

また支持装置43,43’を接続管16,16’に取り付けた際には、各支持部45,45の上面45a,45aを予め決められた高さ位置に配置するように調整しておく。この予め決められた高さ位置とは、各支持部45,45の各上面45a,45aが、管路部本体4の首部8に対して適正な高さ位置で形成された分割式取付部材23の下面側を支持できる位置である。   Further, when the support devices 43 and 43 'are attached to the connection pipes 16 and 16', the upper surfaces 45a and 45a of the support portions 45 and 45 are adjusted so as to be arranged at predetermined height positions. This predetermined height position means that the upper surface 45a, 45a of each support portion 45, 45 is formed at an appropriate height position with respect to the neck portion 8 of the pipe portion main body 4, and is divided. It is a position which can support the lower surface side.

次いで、図4に示されるように、地上にて分割構造体24,25に対して補助プレート47,47を固定的に取付ける。補助プレート47は、剛性のある金属板等から形成されており、その両端部には長手方向に沿って延びる長孔48,48が形成されている。このように、補助プレート47は長孔48,48がそれぞれ設けられているため、補助プレート47自体の強度を保ちつつ、後述するように各長孔48に沿って移動する分割構造体24,25を隣接する長孔48,48の端部同士で規制できる。補助プレート47,47の取付け態様について詳しく説明すると、分割構造体24,25を所定間隔離間させた状態で、分割構造体24,25の対向し合う非貫通孔46,46’同士(図6参照)に補助プレート47,47を架け渡すように配置し、各長孔48を介してそれぞれの非貫通孔46,46’にアイボルト49を螺挿して緊締することで補助プレート47,47が分割構造体24,25に対して固定的に取付けられる。すなわち、分割構造体24,25が所定間隔離間した状態で補助プレート47,47によりユニット化される。尚、補助プレート47は、剛性を有していれば、金属に限られず樹脂等の部材で構成されてもよいし、リブを有する構造であってもよい。さらに尚、補助プレートは、その中央部に長手方向に沿って延びる1つの長孔が設けられていてもよい。   Next, as shown in FIG. 4, auxiliary plates 47 and 47 are fixedly attached to the divided structures 24 and 25 on the ground. The auxiliary plate 47 is formed of a rigid metal plate or the like, and long holes 48 extending in the longitudinal direction are formed at both ends thereof. As described above, since the auxiliary plate 47 is provided with the long holes 48 and 48, the divided structures 24 and 25 that move along the long holes 48 as described later while maintaining the strength of the auxiliary plate 47 itself. Can be regulated by the ends of the adjacent long holes 48, 48. The attachment mode of the auxiliary plates 47 and 47 will be described in detail. The non-through holes 46 and 46 'facing each other in the divided structures 24 and 25 are separated from each other in a state where the divided structures 24 and 25 are separated by a predetermined distance (see FIG. 6). Auxiliary plates 47, 47 are arranged so as to be bridged, and the eyebolts 49 are screwed into the respective non-through holes 46, 46 'through the respective long holes 48 and tightened, whereby the auxiliary plates 47, 47 are divided. It is fixedly attached to the bodies 24, 25. That is, the divided structures 24 and 25 are unitized by the auxiliary plates 47 and 47 in a state of being separated by a predetermined interval. As long as the auxiliary plate 47 has rigidity, the auxiliary plate 47 is not limited to a metal and may be formed of a member such as a resin, or may have a structure having a rib. Furthermore, the auxiliary plate may be provided with one long hole extending in the longitudinal direction at the center thereof.

その後、各アイボルト49のリング部分にクレーンのワイヤW,Wを連結し、地上から管路部本体4の首部8まで吊り下げ移動させ、分割構造体24,25を首部8を挟んだ両側に配置する。前述のように分割構造体24,25は、補助プレート47,47によりユニット化されているため、分割構造体24,25を一体的に吊り下げ移動させることができる。尚、本実施例では、各ワイヤW,Wは、前記クレーンの吊り部(図示略)から各アイボルト49のリング部分に放射状に延びている態様となっている。   After that, the crane wires W and W are connected to the ring portions of the eyebolts 49 and suspended from the ground to the neck portion 8 of the pipe section main body 4, and the divided structures 24 and 25 are arranged on both sides of the neck portion 8. To do. As described above, since the divided structures 24 and 25 are unitized by the auxiliary plates 47 and 47, the divided structures 24 and 25 can be integrally suspended and moved. In the present embodiment, the wires W, W extend radially from the crane suspension (not shown) to the ring portions of the eyebolts 49.

次に、図5に示されるように、各アイボルト49を緩め、分割構造体24,25を近接する方向に移動させ、分割構造体24,25における板部53,53’の底面53a,53a’を各支持部45,45の各上面45a,45aに載置する。このとき分割構造体24,25は、各アイボルト49が剛性を有する補助プレート47,47の各長孔48に沿って相対的に近づくように移動する。また、分割構造体24,25には鉛直下方、すなわち前記クレーンの吊り部を中心として互いに近接する方向に重力が働いているため、小さな力で移動させることができる。   Next, as shown in FIG. 5, each eyebolt 49 is loosened and the divided structures 24 and 25 are moved in the approaching direction, and the bottom surfaces 53 a and 53 a ′ of the plate portions 53 and 53 ′ in the divided structures 24 and 25. Are placed on the upper surfaces 45a of the support portions 45, 45a. At this time, the divided structures 24 and 25 move so that the eyebolts 49 relatively approach each other along the long holes 48 of the auxiliary plates 47 and 47 having rigidity. Further, since the gravity works on the divided structures 24 and 25 in the vertically downward direction, that is, in the direction in which they are close to each other with the suspension portion of the crane as the center, the divided structures 24 and 25 can be moved with a small force.

そして、分割構造体24,25から補助プレート47,47を取り外すとともに、図6に示されるように、分割構造体24,25を各支持部45,45上でさらに近接させ、分割構造体24,25の接合端部同士を重ね合わせる。このように分割構造体24,25の重量を各支持部45,45に預けることができるため、分割構造体24,25同士を安定させた状態で容易に接合作業を行える。なお、対向しあう突出片52,52’に架けて図示しないボルトを挿通するとともにナットを締め付けることで、分割構造体24,25同士を引き寄せてもよい。   Then, the auxiliary plates 47, 47 are removed from the divided structures 24, 25, and as shown in FIG. 6, the divided structures 24, 25 are brought closer to each other on the support portions 45, 45 so that the divided structures 24, 25 joining ends are overlapped. As described above, since the weight of the divided structures 24 and 25 can be entrusted to the support portions 45 and 45, the joining work can be easily performed in a state where the divided structures 24 and 25 are stabilized. Note that the divided structures 24 and 25 may be pulled together by inserting bolts (not shown) across the projecting pieces 52 and 52 'facing each other and tightening the nuts.

図7に示されるように、分割構造体24,25の接合端部同士を重ね合わせる際には、分割構造体24の板部53の先端部54と分割構造体25の板部53’の凹部55とを係合させる。これにより、分割構造体24,25は、管路部本体4の首部8に対して分割式取付部材23が適正に形成される分割構造体24,25同士の接続位置に配置される。また、板部53の先端部54と板部53’の凹部55とが係合しているため、分割構造体24,25が離間する方向に落下する虞を防止できる。   As shown in FIG. 7, when the joining ends of the divided structures 24 and 25 are overlapped with each other, the front end portion 54 of the plate portion 53 of the divided structure 24 and the concave portion of the plate portion 53 ′ of the divided structure 25. 55 is engaged. Thereby, the divided structures 24 and 25 are arranged at the connection positions of the divided structures 24 and 25 where the divided attachment member 23 is appropriately formed with respect to the neck portion 8 of the pipe section main body 4. Moreover, since the front-end | tip part 54 of the board part 53 and the recessed part 55 of board part 53 'are engaging, the possibility that the division | segmentation structures 24 and 25 may fall in the direction which separates can be prevented.

続いて、対向し合うそれぞれの突出片52,52及び突出片52’,52’に対して複数のボルト41,41,…及びナット50,50,…(1つのみ図示)を仮締めして、前記接続位置に配置された分割構造体24,25同士を仮固定する。その後、各支持部45,45を上昇させて分割構造体24,25の位置を補正し、前記ボルト41,41,…及びナット50,50,…を本締めして分割式取付部材23を形成する。このように、接続位置にて分割構造体24,25同士が接続固定されることにより、管路部本体4の首部8の管路部フランジ7に対して分割式取付部材23が各密封部材30を介して密封状に固定されるため、分割式取付部材23の密封取付け作業が極めて容易である。尚、図7の二点鎖線で示されるように、別体の補助ジャッキ60,60を追加して配置し、分割式取付部材23をより安定的に支持するようにしてもよい。   Subsequently, a plurality of bolts 41, 41,... And nuts 50, 50,... (Only one is shown) are temporarily tightened on the protruding pieces 52, 52 and the protruding pieces 52 ′, 52 ′ facing each other. Then, the divided structures 24 and 25 arranged at the connection positions are temporarily fixed. Thereafter, the support portions 45, 45 are raised to correct the positions of the divided structures 24, 25, and the bolts 41, 41,... And the nuts 50, 50,. To do. In this way, the divided structures 24 and 25 are connected and fixed at the connection position, so that the split mounting member 23 is attached to each of the sealing members 30 with respect to the pipe line flange 7 of the neck part 8 of the pipe body 4. Therefore, it is very easy to seal and attach the split type mounting member 23. In addition, as shown with the dashed-two dotted line of FIG. 7, the separate auxiliary jacks 60 and 60 may be added and arrange | positioned and the division | segmentation type attachment member 23 may be supported more stably.

上述のように、この場合、補助プレート47,47と、各支持部45,45と、板部53及び板部53’とは、分割構造体24,25を該分割構造体24,25同士の接続位置に案内する案内手段を構成しており、補助プレート47,47の長孔48,48,48,48と、各支持部45,45の各上面45a,45aと、板部53の先端部54及び板部53’の凹部55(係合部)は、分割構造体24,25を接続位置に誘導する案内路として機能している。   As described above, in this case, the auxiliary plates 47 and 47, the support portions 45 and 45, the plate portion 53 and the plate portion 53 ′ are formed by dividing the divided structures 24 and 25 between the divided structures 24 and 25. The guide means for guiding to the connection position is configured, the long holes 48, 48, 48, 48 of the auxiliary plates 47, 47, the upper surfaces 45a, 45a of the support portions 45, 45, and the tip end portion of the plate portion 53. 54 and the recessed part 55 (engagement part) of board part 53 'are functioning as a guide path which guides the division | segmentation structures 24 and 25 to a connection position.

次に、図7の部分拡大部に示されるように、作業用ボルト37,37,…の頭に対して止めネジ61,61,…(1つのみ図示)を締め付ける。またフランジ上部固定ボルト58により弁蓋フランジ13を管路部フランジ7側に押し付け、各部の密封保持を確実にするとともに、作業用ナット38,38,…を取り外す。尚、このとき、フランジ下部固定ボルト59を利用して弁蓋フランジ13と管路部フランジ7とを強固に狭持してもよい。   Next, as shown in the partially enlarged portion of FIG. 7, set screws 61, 61,... (Only one is shown) are tightened against the heads of the working bolts 37, 37,. Further, the valve lid flange 13 is pressed against the pipe portion flange 7 side by the flange upper fixing bolt 58 to ensure the sealing and holding of each portion and to remove the working nuts 38, 38,. At this time, the valve lid flange 13 and the pipe line flange 7 may be firmly held using the flange lower fixing bolt 59.

その後、図8に示されるように、分割式取付部材23のフランジ部31に対して、合いフランジ26を取り付けるとともに、その合いフランジ26に対して、流体注入用の配管や圧力計等が設けられた流体圧蓋62を取り付け、分割式取付部材23の内部の流体圧試験を行う。尚、流体圧試験は、弁体撤去装置1を構成する作業弁22を用いて行ってもよい。   Thereafter, as shown in FIG. 8, the mating flange 26 is attached to the flange portion 31 of the split mounting member 23, and a fluid injection pipe, a pressure gauge, and the like are provided to the mating flange 26. The fluid pressure lid 62 is attached, and the fluid pressure test inside the split attachment member 23 is performed. In addition, you may perform a fluid pressure test using the working valve 22 which comprises the valve body removal apparatus 1. FIG.

次に、図9に示されるように、合いフランジ26から流体圧蓋62(図8参照)を取り外すとともに弁吊ロッド34を取付け、合いフランジ26に作業弁装置27と円筒部材28とを取り付ける。そして、弁吊移動工具33を組み付けた上蓋29を円筒部材28の上端に取り付けて作業用ケース21を構成する。尚、作業弁装置27、円筒部材28、上蓋29及び弁吊移動工具33を予め組み立てて一体化させておき、分割式取付部材23の上部に一括で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. 9, the fluid pressure lid 62 (see FIG. 8) is removed from the mating flange 26, the valve suspension rod 34 is attached, and the work valve device 27 and the cylindrical member 28 are attached to the mating flange 26. Then, the work case 21 is configured by attaching the upper lid 29 assembled with the valve suspension moving tool 33 to the upper end of the cylindrical member 28. The work valve device 27, the cylindrical member 28, the upper lid 29, and the valve lifting / moving tool 33 may be assembled and integrated in advance, and may be fixed to the upper part of the split mounting member 23 at a time. Thereby, workability | operativity at a work site can be improved significantly.

次いで、作業用ケース21内に流体を注入し、作業用ケース21内と前記管路構成部内との流体圧を同圧とする。   Next, a fluid is injected into the working case 21 so that the fluid pressure in the working case 21 and the inside of the pipe line structure are the same.

次に、図9に示されるように、前記フランジ上部固定ボルト58,58を退行させ、弁吊移動工具33の上部ナット51,51,…(図2参照)を緩め、前述した操作により、徐々に弁吊ロッド34を上方に移動させて、弁本体部11を引き上げる。このときには、ドレン63から作業用ケース21内の流体を排出することにより、その流体と一緒に弁本体部11の引き上げ作業時に発生する夾雑物等を作業用ケース21外に排出できる。弁本体部11を引き上げた後には、作業弁22を閉操作し、作業弁装置27から円筒部材28、上蓋29、弁吊移動工具33、及び弁本体部11を撤去する。なお、上蓋29、弁吊移動工具33、及び弁本体部11のみを撤去してもよい。   Next, as shown in FIG. 9, the flange upper fixing bolts 58, 58 are retracted, and the upper nuts 51, 51,... (See FIG. 2) of the valve suspension moving tool 33 are loosened. The valve suspension rod 34 is moved upward to raise the valve body 11. At this time, by draining the fluid in the working case 21 from the drain 63, it is possible to discharge the foreign matter generated during the lifting operation of the valve main body 11 together with the fluid to the outside of the working case 21. After pulling up the valve main body 11, the work valve 22 is closed, and the cylindrical member 28, the upper lid 29, the valve suspension moving tool 33, and the valve main body 11 are removed from the work valve device 27. In addition, you may remove only the upper cover 29, the valve hanging movement tool 33, and the valve main-body part 11. FIG.

尚、弁本体部11を引き上げた後には、弁本体部11と管路部フランジ7との間に配設されていた前述のガスケットリングが、管路部フランジ7側の凹溝に残存する場合がある。分割式取付部材23に設けられた確認用窓64を介して、前記ガスケットリングの残存を確認した場合には、確認用窓64により前記ガスケットリングの位置を視認しながら、分割式取付部材23に設けられた作業孔65を介して管路部フランジ7にアクセス可能な取外しロッド66を用いてガスケットリングの除去する作業を行う(図9参照)。   In addition, after pulling up the valve body 11, the aforementioned gasket ring disposed between the valve body 11 and the pipe line flange 7 remains in the groove on the pipe flange 7 side. There is. When it is confirmed that the gasket ring remains through the confirmation window 64 provided on the split type attachment member 23, the position of the gasket ring is visually confirmed by the confirmation window 64. The removal of the gasket ring is performed using a removal rod 66 accessible to the pipe line flange 7 through the provided work hole 65 (see FIG. 9).

そして、図10に示されるように、作業弁装置27に対して円筒部材28、上蓋29、弁吊移動工具33を組み付ける。弁吊移動工具33の弁吊ロッド34には、新規の弁本体部11’が係合されている。この弁本体部11’の弁蓋フランジ13’には、環状の溝部67が形成されており、該溝部67には、既存のガスケットリングよりも厚みのあるガスケットリング68が固着されている。また弁蓋フランジ13’の上端側には、環状の金属板69が載置されている。   Then, as shown in FIG. 10, the cylindrical member 28, the upper lid 29, and the valve suspension moving tool 33 are assembled to the work valve device 27. A new valve body 11 ′ is engaged with the valve suspension rod 34 of the valve suspension moving tool 33. An annular groove 67 is formed in the valve lid flange 13 ′ of the valve body 11 ′, and a gasket ring 68 having a thickness larger than that of the existing gasket ring is fixed to the groove 67. An annular metal plate 69 is placed on the upper end side of the valve lid flange 13 '.

次いで、円筒部材28内に流体を注入して、円筒部材28内の流体圧と分割式取付部材23側の流体圧とを同圧にし、作業弁22を開操作し、前記レバーホイスト36を操作して弁本体部11’を管路部本体4に取付ける。そして、図示しないが、フランジ上部固定ボルト58を螺進させて弁蓋フランジ13’を管路部フランジ7に押し付けるとともに、上部吊り金具35、上蓋29、円筒部材28を撤去し、弁吊ロッド34を撤去する。そして作業用ボルト37に作業用ナット38を取付ける。さらに上部固定ボルト58を解除し、作業弁装置27、合いフランジ26、分割式取付部材23、支持装置43,43’等を撤去し、作業用ボルト37及び作業用ナット38をボルト・ナット等に交換し、アダプター40をキャップ39に交換して、弁本体部11’への交換作業が完了する。   Next, fluid is injected into the cylindrical member 28 so that the fluid pressure in the cylindrical member 28 and the fluid pressure on the split-type mounting member 23 side are the same, the work valve 22 is opened, and the lever hoist 36 is operated. Then, the valve body 11 ′ is attached to the conduit body 4. Although not shown, the flange upper fixing bolt 58 is screwed to press the valve lid flange 13 ′ against the pipe line flange 7, and the upper suspension fitting 35, the upper lid 29, and the cylindrical member 28 are removed, and the valve suspension rod 34 is removed. To remove. Then, a work nut 38 is attached to the work bolt 37. Further, the upper fixing bolt 58 is released, the work valve device 27, the mating flange 26, the split mounting member 23, the support devices 43 and 43 ′, etc. are removed, and the work bolt 37 and the work nut 38 are replaced with bolts and nuts. After replacement, the adapter 40 is replaced with the cap 39, and the replacement operation to the valve body 11 ′ is completed.

前述したようにガスケットリング68は、既存のガスケットリングよりも厚いため、フランジ上部固定ボルト58により弁蓋フランジ13’を管路部フランジ7に押し付けた際に潰されて前記既存のガスケットリングが配置されていた管路部フランジ7側の凹溝に入り込み、弁本体部11’と管路部本体4とを確実に密封できる。さらに、フランジ上部固定ボルト58は、弁蓋フランジ13’の金属板69に当接するようにして、弁蓋フランジ13’が損傷することを防止している。   As described above, since the gasket ring 68 is thicker than the existing gasket ring, the existing gasket ring is arranged by being crushed when the valve lid flange 13 ′ is pressed against the pipe line flange 7 by the flange upper fixing bolt 58. The valve body 11 ′ and the pipe body 4 can be reliably sealed by entering the recessed groove on the pipe flange 7 side. Further, the flange upper fixing bolt 58 contacts the metal plate 69 of the valve lid flange 13 'to prevent the valve lid flange 13' from being damaged.

尚、前記実施例では、案内路が、補助プレート47,47の長孔48,48,48,48と、各支持部45,45の各上面45a,45aと、板部53の先端部54及び板部53’の凹部55と、により構成される態様について説明したが、各支持部45,45の各上面45a,45a、または板部53の先端部54及び板部53’の凹部55のいずれか一方のみで構成され、他の構成を省略してもよい。更に尚、補助プレート47の各長孔48を分割構造体24,25が接続位置まで移動可能となるように長く延ばして形成して、各支持部45,45の各上面45a,45a、及び板部53の先端部54及び板部53’の凹部55の構成を省略してもよい。   In the above-described embodiment, the guide path includes the long holes 48, 48, 48, 48 of the auxiliary plates 47, 47, the upper surfaces 45 a, 45 a of the support portions 45, 45, the distal end portion 54 of the plate portion 53, and the like. Although the aspect comprised by the recessed part 55 of board part 53 'was demonstrated, each of upper surface 45a, 45a of each support part 45, 45 or the front-end | tip part 54 of board part 53, and the recessed part 55 of board part 53' Only one of them may be configured, and the other configuration may be omitted. Furthermore, the long holes 48 of the auxiliary plate 47 are formed so as to extend long so that the divided structures 24 and 25 can move to the connection position, and the upper surfaces 45a and 45a of the support portions 45 and 45, and the plate. You may abbreviate | omit the structure of the front-end | tip part 54 of the part 53, and the recessed part 55 of board part 53 '.

また、板部53の先端部54及び板部53’の凹部55を、分割構造体24,25を接続位置に案内する係合部として説明したが、例えば、板部53の先端部54が分割構造体25側に延びるように形成し、板部53’に前記板部53の先端部54を挿入可能な挿入部を形成し、前記板部53の先端部54と板部53’の挿入部とを摺動させることで分割構造体24,25が接続位置に案内されるようにしてもよいし、互いに係合可能なフック形状等に形成してもよい。また、前記実施例では、分割構造体24に板部53,53を設け、分割構造体25に板部53’,53’を設けた態様であったが、各分割構造体に板部53,53’をそれぞれ形成してもよい。   Moreover, although the front-end | tip part 54 of the board part 53 and the recessed part 55 of board part 53 'were demonstrated as an engaging part which guides the division | segmentation structures 24 and 25 to a connection position, for example, the front-end | tip part 54 of the board part 53 divides | segments. An insertion portion is formed so as to extend toward the structure 25 side, and an insertion portion into which the distal end portion 54 of the plate portion 53 can be inserted is formed in the plate portion 53 ′, and an insertion portion between the distal end portion 54 of the plate portion 53 and the plate portion 53 ′. And the divided structures 24 and 25 may be guided to the connection position, or may be formed in a hook shape or the like that can be engaged with each other. Moreover, in the said Example, although plate part 53,53 was provided in the division | segmentation structure 24, and plate part 53 ', 53' was provided in the division | segmentation structure 25, plate part 53, Each of 53 'may be formed.

尚、案内手段の変形例として、図11を参照して説明すると、支持装置80は、首部8の管軸と直交する回転軸82,82,…周りに回転可能なローラー85,85,…を備えたローラー部材83が、支持部81,81’の上端に渡って設けられている。これによれば、ローラー部材83の上に分割構造体24,25を載置し、対向する突出片52,52’に長尺ボルト84及びナット50,50を緊締操作することで、ローラー85,85,…が転動して分割構造体24,25を接続位置に円滑に誘導することができる。尚、このローラー部材83は、分割構造体24,25を接続位置に円滑に移動させるための移動円滑部の一例であり、例えば、支持装置の支持部の上端同士を平板材で連結し、その平板材の上面を鏡面仕上げにしたり、材料として樹脂などの低摩擦材を採用したりすることで摩擦力を減らして分割構造体24,25と前記平板材との摺動を円滑にしてもよい。なお、この場合、補助プレート47を用いなくてもよい。   As a modification of the guide means, a description will be given with reference to FIG. 11. The support device 80 includes rollers 85, 85,... That can rotate around rotation shafts 82, 82,. The provided roller member 83 is provided over the upper ends of the support portions 81 and 81 ′. According to this, the divided structures 24 and 25 are placed on the roller member 83, and the long bolts 84 and the nuts 50 and 50 are tightened to the opposing projecting pieces 52 and 52 ′, whereby the rollers 85 and 85,... Can roll to smoothly guide the divided structures 24, 25 to the connection positions. The roller member 83 is an example of a moving smooth portion for smoothly moving the divided structures 24 and 25 to the connection position. For example, the upper ends of the support portions of the support device are connected by a flat plate material, The upper surface of the flat plate material may be mirror-finished, or a low friction material such as resin may be used as a material to reduce the frictional force so that the divided structures 24, 25 and the flat plate material slide smoothly. . In this case, the auxiliary plate 47 may not be used.

また、案内手段の変形例として、図12(a)を参照して説明すると、弁蓋フランジ13の上面には、分割構造体24,25を接続位置に誘導するための案内片90,90’が設けられている。この案内片90,90’は剛性のある金属板等から形成されており、弁蓋フランジ13上面と作業用ボルト37,37,…との間に挟まれて取付けられている。また、図12(b)に示されるように、分割構造体24,25の内周面側には、突起片91,91が設けられており、この突起片91,91が案内片90,90’の上面に載置されることで、分割構造体24,25を支持できるとともに、案内片90,90’の上面に沿って突起片91,91を摺動させることで分割構造体24,25を接続位置に案内することができる。   Further, as a modified example of the guide means, a description will be given with reference to FIG. 12A. Guide pieces 90 and 90 ′ for guiding the divided structures 24 and 25 to the connection position are provided on the upper surface of the valve lid flange 13. Is provided. The guide pieces 90, 90 'are formed of a rigid metal plate or the like, and are attached by being sandwiched between the upper surface of the valve lid flange 13 and the working bolts 37, 37,. Further, as shown in FIG. 12B, projecting pieces 91 and 91 are provided on the inner peripheral surface side of the divided structures 24 and 25, and the projecting pieces 91 and 91 are guide pieces 90 and 90, respectively. It is possible to support the divided structures 24 and 25 by being placed on the upper surface of 'and to slide the projecting pieces 91 and 91 along the upper surfaces of the guide pieces 90 and 90'. Can be guided to the connection position.

尚、図示しないが、分割構造体24,25の所定の位置に突部をそれぞれ設けるとともに、前記突部をそれぞれ挿入可能な挿入口を有する固定具を首部8における所定の位置に固定設置し、分割構造体24,25の各突部が固定具の各挿入口に挿入されることにより、分割構造体24,25が接続位置に配置されるようにしてもよい。   Although not shown in the drawings, a protrusion is provided at a predetermined position of each of the divided structural bodies 24 and 25, and a fixture having an insertion port into which the protrusion can be inserted is fixedly installed at a predetermined position on the neck 8, The divided structures 24 and 25 may be arranged at the connection positions by inserting the protrusions of the divided structures 24 and 25 into the insertion ports of the fixture.

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.

例えば、前記実施例では、分割式取付部材23は、首部8の周方向に2分割された分割構造体24,25から構成されている態様について説明したが、3つ以上の分割構造体から構成されていてもよい。また、作業用ケースは、取付部材が分割構造であれば、その他の各種部材同士が溶接等で一体化されていてもよい。さらに作業用ケースは、上下に一体化された複数の分割構造体により構成されてもいてもよい。   For example, in the above-described embodiment, the split-type attachment member 23 has been described with respect to the split structure bodies 24 and 25 that are split into two in the circumferential direction of the neck portion 8. However, the split mount member 23 includes three or more split structure bodies. May be. Further, in the working case, if the mounting member is a divided structure, other various members may be integrated by welding or the like. Furthermore, the working case may be configured by a plurality of divided structures integrated vertically.

また、本実施例では弁装置を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 this embodiment, the valve device is a gate valve, but a butterfly valve, a switching valve, a ball valve, a plug, or the like may be used.

また、本実施例では、既存の弁本体部11を撤去後、新規の弁本体部11’に交換したが、例えば閉塞蓋や他の空気弁等の管接続部材に交換してもよい。   In this embodiment, the existing valve body 11 is removed and replaced with a new valve body 11 ′. However, it may be replaced with a pipe connection member such as a closing lid or other air valve.

1 弁体撤去装置
2,2’ 流体管
3 仕切弁装置(弁装置)
4 管路部本体
8 首部
11,11’ 弁本体部
21 作業用ケース
22 作業弁
23 分割式取付部材(取付部材)
24,25 分割構造体(分割体)
26 合いフランジ
27 作業弁装置
33 弁吊移動工具(弁移動手段)
43,43’ 支持装置
45 支持部(案内手段)
47 補助プレート(案内手段)
48 長孔(案内路)
49 アイボルト
53,53’ 板部(案内手段)
54 板部の先端部(係合部)
55 板部の凹部(係合部、案内路)
80 支持装置
81,81’ 支持部
83 ローラー部材(案内手段、移動円滑部)
90,90’ 案内片(案内手段,案内路)
1 Valve body removal device 2, 2 'Fluid pipe 3 Gate valve device (valve device)
4 Pipe section body 8 Neck section 11, 11 ′ Valve body section 21 Work case 22 Work valve 23 Split type mounting member (mounting member)
24,25 Divided structure (divided body)
26 Fitting flange 27 Work valve device 33 Valve suspension moving tool (valve moving means)
43, 43 'support device 45 support part (guide means)
47 Auxiliary plate (guide means)
48 long hole (guideway)
49 Eyebolt 53, 53 'Plate part (guide means)
54 End of plate (engagement part)
55 Recessed part of plate (engagement part, guideway)
80 Support devices 81, 81 ′ Support portion 83 Roller member (guide means, moving smooth portion)
90, 90 'guide piece (guide means, guide way)

Claims (4)

流体管に連結される管路部本体及び該管路部本体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作業弁及び弁移動手段を用いて不断流状態で撤去するための弁体撤去装置であって、
前記管路部本体を構成する首部側を囲う作業用ケースと、前記作業用ケース内と前記流体管内との同圧状態で前記弁本体部を引き上げるための弁吊ロッドと、前記作業用ケースを前記首部に密封状態に固定するための密封部材を有し、複数の分割体から成る取付部材と、前記複数の分割体を移動可能に一体に保持するとともに、前記複数の分割体同士の接続位置に前記分割体を案内する案内手段と、前記弁装置の両側の前記流体管に設けられ、前記作業用ケースを高さ調整可能に支持する支持装置と、を備えており、前記案内手段により案内された前記複数の分割体を前記支持装置に載置して接続固定することを特徴とする弁体撤去装置。
For removing the valve main body of a valve device having a pipe main body connected to a fluid pipe and a valve main body capable of closing the pipe main body in an uninterrupted state using a working valve and a valve moving means. A valve body removal device,
A working case that surrounds the neck side constituting the pipe body, a valve suspension rod for pulling up the valve body in the same pressure state in the working case and the fluid pipe, and the working case A sealing member for fixing the neck portion in a hermetically sealed state, an attachment member composed of a plurality of divided bodies, and the plurality of divided bodies are integrally held so as to be movable, and the connecting positions of the plurality of divided bodies Guide means for guiding the divided body, and a support device provided on the fluid pipes on both sides of the valve device and supporting the work case so that the height of the work case can be adjusted, and is guided by the guide means. The valve body removing device , wherein the plurality of divided bodies placed on the support device are connected and fixed .
前記案内手段は、前記複数の分割体を前記接続位置に誘導する案内路を備えていることを特徴とする請求項1に記載の弁体撤去装置。   2. The valve body removing device according to claim 1, wherein the guide unit includes a guide path that guides the plurality of divided bodies to the connection position. 前記案内手段は、前記複数の分割体同士を離間させた状態で、前記取付部材を吊り下げ可能であり、且つ該取付部材の吊り下げ状態で、前記複数の分割体同士の離間状態を解除可能であ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。 The guide means can suspend the mounting member in a state where the plurality of divided bodies are separated from each other, and can release the separated state of the plurality of divided bodies in a suspended state of the mounting member. valve body removal apparatus according to claim 1 or 2, characterized in that. 前記案内手段は、前記各分割体にそれぞれ設けられ互いに係合可能な係合部を有してい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 valve body removing device according to any one of claims 1 to 3, wherein the guide means includes engaging portions that are respectively provided in the divided bodies and engageable with each other.
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JP2523146B2 (en) * 1987-12-02 1996-08-07 株式会社大氣社 Structure construction method
JPH0749194Y2 (en) * 1990-02-19 1995-11-13 東京瓦斯株式会社 Fitting mounting jig
JPH0561334U (en) * 1992-01-28 1993-08-13 松下電工株式会社 Drain pipe cover
JPH0634080A (en) * 1992-07-10 1994-02-08 Takeshi Oe Piping hole clearance filling auxiliary panel
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