JP2011219964A - Method for maintaining flange pipe - Google Patents
Method for maintaining flange pipe Download PDFInfo
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- JP2011219964A JP2011219964A JP2010089114A JP2010089114A JP2011219964A JP 2011219964 A JP2011219964 A JP 2011219964A JP 2010089114 A JP2010089114 A JP 2010089114A JP 2010089114 A JP2010089114 A JP 2010089114A JP 2011219964 A JP2011219964 A JP 2011219964A
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- JP
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- Prior art keywords
- pipe
- flange
- flange pipe
- equipment
- tube
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 238000000034 method Methods 0.000 title claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 24
- 238000003825 pressing Methods 0.000 claims abstract description 8
- 238000012423 maintenance Methods 0.000 claims description 16
- 238000012856 packing Methods 0.000 abstract description 7
- 238000010276 construction Methods 0.000 description 7
- 230000002093 peripheral effect Effects 0.000 description 5
- 239000000428 dust Substances 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000008213 purified water Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
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- Flanged Joints, Insulating Joints, And Other Joints (AREA)
- Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
Abstract
Description
本発明はフランジ管の保全工法に関し、上水道のうち、配水設備、そのうち配水本管の管路の地表に位置する空気弁や消火栓等の付属設備を接合するため、Ｔ字管との間に介在されるフランジ管の修理、交換等を行うためのフランジ管の保全工法に関し、特に６００ｍｍ〜２４００ｍｍの大口径のフランジ管の保全工法に関する。 The present invention relates to a maintenance method for flange pipes, and is connected to a T-shaped pipe in order to join water supply facilities, such as water distribution facilities, and auxiliary equipment such as air valves and fire hydrants located on the surface of the main distribution line More particularly, the present invention relates to a maintenance method for flange pipes having a large diameter of 600 mm to 2400 mm.
一般的に、上水道のうち、配水施設は、送水施設によって送られた浄水を、給水区域内に所要の水圧と水量を確保して配分するためのものであり、そこには工事のため一定区間を断水するための制水弁（仕切弁）のほか、空気弁、消火栓が付属設備として設けられている。 In general, in the waterworks, the water distribution facility is for distributing the purified water sent by the water supply facility within the water supply area with the required water pressure and quantity, and there is a certain section for construction. In addition to a water control valve (gate valve) for shutting off water, an air valve and a fire hydrant are provided as accessory equipment.
空気弁は、管路の凸部に設置され、管内の空気排除と、管内へ空気を吸引するために使用されるバルブであり、消火栓は消防に用いるほか、管内の排水作業に使用され、道路の交差点分岐点付近に設けられ、その途中でも１００〜２００ｍの間隔で設置される。 The air valve is a valve that is installed at the convex part of the pipe line and is used to eliminate air in the pipe and to suck air into the pipe. The fire hydrant is used for fire fighting, drainage work in the pipe, road It is provided in the vicinity of the intersection branching point, and it is also installed at intervals of 100 to 200 m in the middle.
そして、上記した配水本管やフランジ管は、給水設備とは異なって大量の水を通水するため大口径のものが使用され、凸部に位置するＴ字管と付属設備をつなぐフランジ管は、そのフランジ部分をＴ字管や付属設備とボルトで締結されている。 The water distribution main pipe and flange pipe described above are different from the water supply equipment in that large-diameter pipes are used to pass a large amount of water. The flange pipe connecting the T-shaped pipe located on the convex part and the attached equipment is The flange part is fastened with a T-shaped tube and attached equipment with bolts.
また、フランジ管には、その外周面に補強のための翼部が放射状に複数一体成形されているが、この補強のための翼部は疲労し易く、時として、この翼部部分の劣化によって漏水を生じてしまうことがある。 In addition, a plurality of wing parts for reinforcement are radially formed integrally on the outer peripheral surface of the flange pipe, but the wing parts for reinforcement are easily fatigued, sometimes due to deterioration of the wing part. It may cause water leakage.
そのため、このフランジ管の修理や交換のため保全工事が必要となるが、従来は、この保全工事に関し、大掛かりな工事設備と、時間、そして、多数の人員を要するものとなり、開始から復旧までの労力は甚大なものとなっており、フランジ管を外した際に、Ｔ字管の開口から、泥や塵埃が配水本管へ侵入してしまう虞が多々あったものである。 For this reason, maintenance work is required for repairing and replacing this flange tube. Conventionally, this maintenance work requires extensive construction equipment, time, and a large number of personnel. The labor is tremendous, and when the flange pipe is removed, there is often a risk that mud and dust may enter the water distribution main from the opening of the T-shaped pipe.
出願人は、本願発明について、先行する技術文献を調査したが、格別に本願発明と関連し、類似すると思われる文献は発見できなかった。 Although the applicant investigated the prior art documents regarding the present invention, the applicant could not find any documents that are related to the present invention and seem to be similar.
本願発明が解決しようとする問題点は、配水本管のＴ字管と付属設備を接合するフランジ管の修理、交換について、従来は、これを容易に短時間で、しかも精度よく実行することができる工法がなかったという点である。 The problem to be solved by the present invention is that, with regard to repair and replacement of the flange pipe that joins the T-shaped pipe of the water distribution main and the attached equipment, conventionally, this can be easily performed in a short time and with high accuracy. There was no construction method that could be done.
上記した問題点を解決するため、本願に係るフランジ管の保全工法は、地表方向に向けて開口する配水管路のＴ字管に、フランジ管を介して付属設備を接合した配水施設であって、前記したＴ字管上部からフランジ管の周囲を上部を開口したパック手段で囲み、かつ、その上方に構成した押圧手段で付属設備をパック手段に対して押圧して位置決めし、前記したパック手段の側面に設けられたハッチから、Ｔ字管とフランジ管、及びフランジ管と付属設備を連結するボルトを外し、そのフランジ管の修理、交換を行うことを特徴としている。 In order to solve the above-described problems, the flange pipe maintenance method according to the present application is a water distribution facility in which an auxiliary equipment is joined to a T-shaped pipe of a water distribution pipe that opens toward the ground surface via a flange pipe. And surrounding the flange tube from the above-mentioned T-shaped tube by a packing means having an opening at the top, and pressing and positioning the attached equipment against the packing means with the pressing means configured above the packing means. The T-tube and the flange tube, and the bolts that connect the flange tube and the attached equipment are removed from the hatch provided on the side surface, and the flange tube is repaired and replaced.
また、本願に係るフランジ管の保全工法は、前記したフランジ管を取り外し、あるいは新規なフランジ管を導入する際は、押圧している付属設備を一旦退かし、パック手段の上方開口より行うことを特徴とし、前記した押圧手段は組んだ櫓を利用し、付属設備を維持状態としてなされることを特徴とし、前記した付属設備は空気弁あるいは消火栓であることを特徴としている。 In addition, the flange pipe maintenance method according to the present application is to remove the flange pipe described above or introduce a new flange pipe by temporarily withdrawing the attached accessory equipment and starting from the upper opening of the pack means. The pressing means described above is characterized in that the attached equipment is maintained in a maintained state using a built-in kite, and the attached equipment is an air valve or a fire hydrant.
本願に係るフランジ管の保全工法は上記のように構成されている。そのため、Ｔ字管と接合されているフランジ管の周域は、工事の開始から終了までパック手段で囲まれており、作業中にＴ字管内に泥や塵埃が混入してしまう虞は一切なく、連結ボルトの取り外しや新たな締結もパック手段に形成されたハッチを通して行うことができる。 The flange pipe maintenance method according to the present application is configured as described above. For this reason, the peripheral area of the flange pipe joined to the T-shaped pipe is surrounded by the pack means from the start to the end of the construction, and there is no possibility that mud and dust will be mixed in the T-shaped pipe during the work. The connection bolts can be removed or newly fastened through the hatch formed in the pack means.
そして、上方から櫓を組んで付属設備をパック手段の上縁に押圧することで、しっかりとした位置決めがなされ、ボルトの取り外し作業等で、付属設備がグラ付いたり、自重で作業の障害となってしまうこともない。 And, by attaching a hook from above and pressing the attached equipment against the upper edge of the pack means, it is positioned firmly. There is no end to it.
その作業はクリーンなものとなり、作業者や周辺が汚れることもなく、短時間で、危険性も少なく実行することができるものとなっている。 The work is clean, and the worker and surroundings are not contaminated, and can be executed in a short time and with little danger.
図として示し、実施例で説明したように構成したことで実現した。 This is realized by the configuration shown in the drawing and described in the embodiment.
次に、本発明の好ましい実施の一例を６００〜２４００ｍｍ、特に１２００〜２４００ｍｍ径の管を使用した例を示す図１を参照して説明する。この図にあって１は配水本管を示しており、この配水本管１はやや湾曲して凸部を形成し、その凸部箇所にＴ字管２を形成し、このＴ字管２は上方が開口され、その開口縁には接合のためのフランジ３が一体に形成されている。 Next, an example of a preferred embodiment of the present invention will be described with reference to FIG. 1 showing an example using a pipe having a diameter of 600 to 2400 mm, particularly 1200 to 2400 mm. In this figure, 1 indicates a water distribution main, and this water distribution main 1 is slightly curved to form a convex part, and a T-shaped pipe 2 is formed at the convex part, and this T-shaped pipe 2 is The upper part is opened, and a flange 3 for joining is integrally formed at the opening edge.
また、このＴ字管２の上方には短管としたフランジ管４の下方開口縁のフランジ５を前記したフランジ３と突き合わせ、ボルトにより締結接合されている。一方、このフランジ管４の上方開口のフランジ６には、地表に露呈される空気弁あるいは消火栓である付属設備７がボルト締結されている。 Further, above the T-shaped tube 2, a flange 5 at a lower opening edge of a flange tube 4 which is a short tube is abutted with the flange 3 described above and is fastened and joined by a bolt. On the other hand, the flange 6 at the upper opening of the flange pipe 4 is bolted to an accessory facility 7 which is an air valve or a fire hydrant exposed to the ground surface.
前記したフランジ管４の外周面にはフランジ５と６の間で、複数の補強用の翼体８、８‥が放射状に一体成形されており、この翼体８、８‥が経時変化によって疲労劣化して漏れの原因となるので、この修理あるいはフランジ管４の交換が必要となる。 A plurality of reinforcing wings 8, 8... Are integrally formed radially on the outer peripheral surface of the flange tube 4 between the flanges 5 and 6, and these wings 8, 8. Since this deteriorates and causes leakage, this repair or replacement of the flange tube 4 is necessary.
このフランジ管４の修理、交換に際して、まず、地表からフランジ管４の周域、それもＴ字管２の上部までに至る穴Ｈを掘削する。次いで、フランジ管４の周囲をＴ字管２の上部までパック手段Ｐによって囲い込む。このパック手段はステンレス製のものが使用され、少なくとも上部は開口され、その上部開口縁は付属設備７の底面と対応する。このパック手段は穴Ｈ内に取り込んで設置するので、展開や折り畳みが可能なものとされる。 When repairing or replacing the flange tube 4, first, a hole H extending from the ground surface to the peripheral region of the flange tube 4 and also to the upper portion of the T-shaped tube 2 is excavated. Next, the periphery of the flange tube 4 is enclosed by the pack means P up to the top of the T-shaped tube 2. This packing means is made of stainless steel, and at least the upper part is opened, and the upper opening edge thereof corresponds to the bottom surface of the accessory facility 7. Since this pack means is installed in the hole H, it can be unfolded and folded.
また、前記パック手段Ｐの側面にはハッチ９が形成され、穴Ｈとパック手段Ｐの内部を連通し、パック手段Ｐ内における作業を可能なものとしている。 Further, a hatch 9 is formed on the side surface of the pack means P, and the hole H and the inside of the pack means P are communicated so that the work in the pack means P can be performed.
一方、図中１０は、穴Ｈの開口周域に組まれた櫓を示しており、この櫓に付設された維持手段１１によって付属設備７を固定維持する。この維持手段１１は負荷をかけることができ、付属設備７をパック手段Ｐの上面開口縁に押し付けることができ、位置決め固定することができる。 On the other hand, reference numeral 10 in the figure denotes a gutter assembled in the opening peripheral area of the hole H, and the auxiliary equipment 7 is fixed and maintained by the maintenance means 11 attached to this gutter. This maintenance means 11 can apply a load, the accessory equipment 7 can be pressed against the upper opening edge of the pack means P, and can be positioned and fixed.
上記した、付属設備７の位置決め状態で、ハッチ９を開け、フランジ管４がＴ字管２及び付属設備７と締結されているボルトを外す作業を行ない。この作業が終了すると、維持手段１１を動かして、付属設備７をパック手段Ｐの上面開口から退かし、フランジ管４を上方へ抜き取る。 In the above-described positioning state of the accessory equipment 7, the hatch 9 is opened, and the flange pipe 4 is removed from the T-shaped pipe 2 and the accessory equipment 7. When this operation is completed, the maintenance means 11 is moved, the accessory equipment 7 is retracted from the upper surface opening of the pack means P, and the flange tube 4 is extracted upward.
次いで、新しいフランジ管４を所定位置にセットし、パック手段Ｐのハッチ９からまず、Ｔ字管２とボルトによる締結を行ない、付属設備７を元の位置に戻し、フランジ管４とボルトによる締結を行なう。 Next, a new flange pipe 4 is set at a predetermined position, and first, the T-tube 2 and the bolt are fastened from the hatch 9 of the pack means P, the attached equipment 7 is returned to the original position, and the flange pipe 4 and the bolt are fastened. To do.
上記でフランジ管４を復旧させることになるが、ここから、パック手段Ｐを取り去り、櫓１０を外し、穴Ｈを埋設して、工事は終了する。かかる手順のため、作業は短時間で正確となり、危険性が大きく減少し、作業時間及び工事費用が大幅に節減されることとなる。 The flange pipe 4 is restored as described above. From this point, the pack means P is removed, the hook 10 is removed, the hole H is buried, and the construction is completed. Due to such a procedure, the work becomes accurate in a short time, the danger is greatly reduced, and the work time and construction costs are greatly reduced.
本願に係るフランジ管の保全工法は上記のように構成されている。実施例では配水本管と地表に露呈される付属設備との関連で述べているが、これに限らず、都市ガスや、電気、電話回線等、地中に埋設された管に対して保全を行なう工法について広く応用実施することが可能である。 The flange pipe maintenance method according to the present application is configured as described above. In the examples, it is described in relation to the water distribution main and the auxiliary equipment exposed on the surface of the earth. However, the present invention is not limited to this, and maintenance of pipes buried in the ground such as city gas, electricity, telephone lines, etc. It is possible to apply a wide range of application methods.
１ 配水本管
２ Ｔ字管
３ フランジ
４ フランジ管
５ フランジ
６ フランジ
７ 付属設備
８ 翼体
９ ハッチ
１０ 櫓
１１ 維持手段
Ｈ 穴
Ｐ パック手段
DESCRIPTION OF SYMBOLS 1 Water distribution main pipe 2 T-shaped pipe 3 Flange 4 Flange pipe 5 Flange 6 Flange 7 Accessory equipment 8 Wing body 9 Hatch 10 １１ 11 Maintenance means H hole P Pack means
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010089114A JP5536515B2 (en) | 2010-04-08 | 2010-04-08 | Maintenance method of flange pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010089114A JP5536515B2 (en) | 2010-04-08 | 2010-04-08 | Maintenance method of flange pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2011219964A true JP2011219964A (en) | 2011-11-04 |
| JP5536515B2 JP5536515B2 (en) | 2014-07-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2010089114A Active JP5536515B2 (en) | 2010-04-08 | 2010-04-08 | Maintenance method of flange pipe |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0972111A (en) * | 1995-09-07 | 1997-03-18 | Kajima Corp | Method and equipment for removing asbestos |
| JP2000001881A (en) * | 1998-06-12 | 2000-01-07 | Cosmo Koki Co Ltd | T-shaped pipe for fire hydrant |
| JP2000314156A (en) * | 1999-04-28 | 2000-11-14 | Kurimoto Ltd | Apparatus for ejecting foreign matter in conduit |
| JP2003042817A (en) * | 2001-05-24 | 2003-02-13 | Nippon Suiki Kk | Flow rate measuring instrument for investigating common water and endoscope insert instrument |
| JP2005265087A (en) * | 2004-03-19 | 2005-09-29 | Cosmo Koki Co Ltd | Method for replacing sub-valve attached on branch opening |
| JP2008126093A (en) * | 2006-11-16 | 2008-06-05 | Tohoku Seiki Kogyo Kk | Protective cover for dust-collection/gas-discharge apparatus |
| JP2009222813A (en) * | 2008-03-13 | 2009-10-01 | Nippon Suiki Chosa Kk | Implement for inserting inspection device into pipe |
-
2010
- 2010-04-08 JP JP2010089114A patent/JP5536515B2/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0972111A (en) * | 1995-09-07 | 1997-03-18 | Kajima Corp | Method and equipment for removing asbestos |
| JP2000001881A (en) * | 1998-06-12 | 2000-01-07 | Cosmo Koki Co Ltd | T-shaped pipe for fire hydrant |
| JP2000314156A (en) * | 1999-04-28 | 2000-11-14 | Kurimoto Ltd | Apparatus for ejecting foreign matter in conduit |
| JP2003042817A (en) * | 2001-05-24 | 2003-02-13 | Nippon Suiki Kk | Flow rate measuring instrument for investigating common water and endoscope insert instrument |
| JP2005265087A (en) * | 2004-03-19 | 2005-09-29 | Cosmo Koki Co Ltd | Method for replacing sub-valve attached on branch opening |
| JP2008126093A (en) * | 2006-11-16 | 2008-06-05 | Tohoku Seiki Kogyo Kk | Protective cover for dust-collection/gas-discharge apparatus |
| JP2009222813A (en) * | 2008-03-13 | 2009-10-01 | Nippon Suiki Chosa Kk | Implement for inserting inspection device into pipe |
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| JP5536515B2 (en) | 2014-07-02 |
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