JP2002213646A - Water cutoff joint for pipe end - Google Patents
Water cutoff joint for pipe endInfo
- Publication number
- JP2002213646A JP2002213646A JP2001005587A JP2001005587A JP2002213646A JP 2002213646 A JP2002213646 A JP 2002213646A JP 2001005587 A JP2001005587 A JP 2001005587A JP 2001005587 A JP2001005587 A JP 2001005587A JP 2002213646 A JP2002213646 A JP 2002213646A
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- ring
- packing
- tightening
- water
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Joints With Sleeves (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、例えば旧管更生工
事のため、既設埋設管の内側に引き込んだ引き込み鋼管
の管端と既設埋設管との間を密閉状態で接続する止水継
手に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a watertight joint for hermetically connecting a pipe end of a drawn steel pipe drawn into an existing buried pipe and an existing buried pipe, for example, for rehabilitation of an old pipe.
【０００２】[0002]
【従来の技術】旧管を更生する手法の一つとして、鋳鉄
管等の既設の埋設管の内側に巻き込み鋼管や普通鋼管を
引き込んで、これらの鋼管を新しい管路として使用する
旧管更生方式がある。2. Description of the Related Art As one method of rehabilitating an old pipe, an old pipe rehabilitation method in which a steel pipe or an ordinary steel pipe is drawn into an existing buried pipe such as a cast iron pipe and used as a new pipe line. There is.
【０００３】前記旧管更生方式においては、更生作業を
容易にするために、旧管内に引き込む新管の外周面と旧
管の内周面との間には一定の隙間が必要である。そのた
め、旧管で構成する既設管路の一部を前述したような鋼
管（新管）で更生する場合においては、旧管端部と新管
端部とのつなぎ目に止水継手を配置して、管路内を流れ
る流体が管路外に洩れ出すのを防止する必要がある。In the old pipe rehabilitation system, a certain gap is required between the outer peripheral surface of the new pipe drawn into the old pipe and the inner peripheral surface of the old pipe in order to facilitate the rehabilitation work. Therefore, when a part of the existing pipeline constituted by the old pipe is rehabilitated with a steel pipe (new pipe) as described above, a water stop joint is arranged at a joint between the old pipe end and the new pipe end. It is necessary to prevent the fluid flowing in the pipeline from leaking out of the pipeline.
【０００４】このような管端部の従来の止水継手として
は、例えば実公平４−３３５１３号公報に開示されたも
のがある。この従来の管端部止水継手は、図６（ａ）の
正面図、図６（ｂ）の側面断面図、及び図６（ｂ）中の
Ａ部拡大詳細図である図７に示すように、既設暗渠（旧
管）２１内に引き込まれた引き込み鋼管２２の先端部に
沿って取り付けられたリング形状のパッキング押え金具
２３と、このパッキング押え金具２３に周方向等間隔で
取り付けられた締付ボルト２４と、この締付ボルト２４
に対応する位置に締付ボルト２４が挿入される穴部を有
し、締付ボルト２４に沿って滑動自在なリング状の締付
押輪２５と、既設暗渠（旧管）２１、パッキング押え金
具２３、締付ボルト２４、締付押輪２５よりなる空間部
にリング状に設けられたゴムパッキング２６ａ及び２６
ｂと、これらゴムパッキング２６ａ，２６ｂを締付押輪
２５を介してパッキング押え金具２３方向に締付けるナ
ット２７とからなるものである。[0004] As such a conventional watertight joint at the pipe end, there is, for example, one disclosed in Japanese Utility Model Publication No. 4-33513. This conventional pipe end water shutoff joint is shown in FIG. 7 which is a front view of FIG. 6 (a), a side sectional view of FIG. 6 (b), and an enlarged detailed view of a portion A in FIG. 6 (b). In addition, a ring-shaped packing press fitting 23 attached along the tip of the drawn steel pipe 22 drawn into the existing culvert (old pipe) 21, and a tightening attached to the packing press fitting 23 at regular intervals in the circumferential direction. Bolt 24 and the tightening bolt 24
, A ring-shaped clamping press wheel 25 slidable along the bolt 24, an existing culvert (old pipe) 21, and a packing press fitting 23. Rubber packings 26a and 26 provided in a ring shape in a space portion comprising a tightening bolt 24 and a tightening press ring 25.
b, and a nut 27 for tightening the rubber packings 26a and 26b in the direction of the packing press fitting 23 via the tightening press ring 25.
【０００５】なお、パッキング押え金具２３と締付押輪
２５の外径は、引き込み鋼管（新管）２２の外径よりも
大きく、パッキング押え金具２３と締付押輪２５の内径
は、引き込み鋼管（新管）２２の内径とほぼ同じにして
いる。The outer diameter of the packing press fitting 23 and the tightening press wheel 25 is larger than the outer diameter of the drawn-in steel pipe (new pipe) 22, and the inner diameter of the packing press fitting 23 and the tightening press wheel 25 is set to the drawn steel pipe (new pipe). The inside diameter of the tube 22 is substantially the same.
【０００６】また、ゴムパッキング２６ａとゴムパッキ
ング２６ｂは、お互いに接触する傾斜面を有し、管軸方
向に圧縮されることにより、双方とも傾斜面を滑りなが
ら管径方向に変形するように構成されている。The rubber packing 26a and the rubber packing 26b have inclined surfaces that come into contact with each other, and are configured to be deformed in the radial direction of the tube while sliding on the inclined surfaces by being compressed in the axial direction of the tube. Have been.
【０００７】この止水継手により既設暗渠（旧管）２１
と引き込み鋼管（新管）２２の接続部を止水するときに
は、パッキング押え金具２３を既設暗渠（旧管）２１で
ラップした状態の引き込み鋼管（新管）２２の管端部に
溶接して取り付けた後、ゴムパッキング２６ａとゴムパ
ッキング２６ｂをそれぞれの傾斜面が接触するようにし
て、既設暗渠（旧管）２１、パッキング押え金具２３お
よび締付ボルト２４よりなる空間部に挿入する。[0007] The watertight joint allows the existing culvert (old pipe) 21 to be used.
When stopping the connection of the drawn steel pipe (new pipe) 22, the packing presser 23 is welded to the pipe end of the drawn steel pipe (new pipe) 22 wrapped by the existing culvert (old pipe) 21. After that, the rubber packing 26a and the rubber packing 26b are inserted into the space formed by the existing culvert (old pipe) 21, the packing press fitting 23, and the tightening bolt 24 so that the respective inclined surfaces are in contact with each other.
【０００８】そして、締付ボルト２４が挿入される穴部
を、締付ボルト２４に合わせるようにして、締付押輪２
５をパッキング押え金具２３に装着し、ナット２７を締
付ボルト２４にねじ込んで、締付押輪２５をパッキング
押え金具２３側に押し込む。Then, the hole into which the tightening bolt 24 is inserted is aligned with the tightening bolt 24 so that the tightening press wheel 2
5 is mounted on the packing retainer 23, the nut 27 is screwed into the tightening bolt 24, and the tightening press wheel 25 is pushed into the packing retainer 23.
【０００９】締付押輪２５を押し込むと、ゴムパッキン
グ２６ａ及び２６ｂは、パッキング押え金具２３と締付
押輪２５とで挟み込まれて、軸方向に圧縮されるととも
に、径方向に膨張して、既設暗渠２１の内周面に接触
し、その弾性により既設暗渠（旧管）２１と引き込み鋼
管（新管）２２との間が止水される。When the tightening press ring 25 is pushed in, the rubber packings 26a and 26b are sandwiched between the packing press fitting 23 and the tightening press ring 25, and are compressed in the axial direction and expanded in the radial direction. The inner surface of the pipe 21 contacts the inner surface of the pipe 21, and the elasticity stops the water between the existing culvert (old pipe) 21 and the drawn steel pipe (new pipe) 22.
【００１０】さらに、止水継手の周辺部分にはモルタル
２８を打設して、管緒の内径が引き込み鋼管２２の大き
さから、既設暗渠（旧管）２１の大きさになだらかに移
行するようにモルタル２８によってテーパを形成する。Further, a mortar 28 is cast around the water stop joint so that the inner diameter of the cable is smoothly drawn from the size of the steel pipe 22 to the size of the existing culvert (old pipe) 21. The mortar 28 is used to form a taper.
【００１１】[0011]
【発明が解決しようとする課題】しかしながら、前述し
た実公平４−３３５１３号公報に開示された管端部の止
水継手にあっては、ゴムパッキングをパッキング押え金
具２３と締付押輪２５とで直接挟み込んで止水するよう
にしているので、止水継手の止水部の水圧試験を行うこ
とができず、止水継手が所用の水圧に耐えうるのかどう
か把握できないという難点があった。However, in the water-stop joint at the pipe end disclosed in the above-mentioned Japanese Utility Model Publication No. 4-33513, the rubber packing is formed by the packing press fitting 23 and the tightening press ring 25. Since the water is stopped by directly sandwiching the water, the water pressure test of the water stop portion of the water stop joint cannot be performed, and it is difficult to determine whether the water stop joint can withstand the required water pressure.
【００１２】本発明の技術的課題は、止水継手の止水部
の水圧試験を行えるようにして、止水継手の耐水圧性が
確認でき、信頼性を高め得るようにすることにある。A technical object of the present invention is to make it possible to perform a water pressure test on a water stop portion of a water stop joint so that the water pressure resistance of the water stop joint can be confirmed and reliability can be improved.
【００１３】[0013]
【課題を解決するための手段】本発明の請求項１に係る
管端部の止水継手は、既設埋設管内に引き込まれた引き
込み鋼管の先端部に沿って取り付けられた該引き込み鋼
管よりも大径のリング状のパッキング押え金具と、引き
込み鋼管と同径に設定されて、パッキング押え金具の引
き込み鋼管に取り付けた面とは反対側の面に接続された
短管と、短管の外側に摺動自在に嵌合配置されて、パッ
キング押え金具と対向する締付押輪と、締付押輪とパッ
キング押え金具との間に対向配置された第１と第２のリ
ング状ゴムパッキングと、第１と第２のリング状ゴムパ
ッキングの間に介在設置されて、既設埋設管と短管との
間に隙間を形成するスペーサと、予め短管におけるスペ
ーサに対応する部位に形成され、止水部の水圧試験後に
密閉される注水孔と、締付押輪をパッキング押え金具に
向けて付勢した状態で短管に固定される締付部材と、を
備えたものである。According to a first aspect of the present invention, there is provided a watertight joint at a pipe end, which is larger than a steel pipe attached along an end of a steel pipe drawn into an existing buried pipe. A ring-shaped packing retainer with a diameter, a short pipe set to the same diameter as the drawn steel pipe and connected to the surface of the packing retainer opposite to the surface attached to the drawn-in steel pipe, and a sliding pipe outside the short pipe. A clamping press wheel movably fitted and opposed to the packing press fitting; first and second ring-shaped rubber packings disposed opposite to each other between the clamping press fitting and the packing press fitting; A spacer interposed between the second ring-shaped rubber packings to form a gap between the existing buried pipe and the short pipe, and a spacer formed in advance in a portion of the short pipe corresponding to the spacer, Water injection hole sealed after test , Those having a clamping member fixed to the short tube while urging the junk ring tightening the gland fitting, the.
【００１４】また、請求項２に係る管端部の止水継手
は、第１と第２のリング状ゴムパッキングを、それぞれ
径方向の傾斜面を有する断面くさび状の一対のリングパ
ッキングの組み合わせから構成したものである。According to a second aspect of the present invention, the first and second ring-shaped rubber packings are formed by combining a pair of ring packings each having a radially inclined surface and having a wedge-shaped cross section. It is composed.
【００１５】また、請求項３に係る管端部の止水継手
は、締付部材をパッキング押え金具方向に締め付け、締
付部材の短管への固定後に撤去される締付手段を有する
ものである。According to a third aspect of the present invention, there is provided a watertight joint at a pipe end having a fastening means for fastening a fastening member in a direction of a packing presser fitting and removing the fastening member after fixing the fastening member to the short pipe. is there.
【００１６】[0016]
【発明の実施の形態】以下、本発明の一実施形態に係る
管端部の止水継手を図１乃至図４に基づき説明する。図
１は本実施形態に係る管端部の止水継手のパッキング締
め付け時の状態を示す側面断面図、図２は図１中のＢ部
拡大詳細図、図３その更生完了時の状態を示すもので、
図３（ａ）は側面断面図、図３（ｂ）は図３（ａ）中の
Ａ−Ａ矢視断面図、図４は図３（ａ）中のＣ部拡大詳細
図である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A watertight joint at a pipe end according to an embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a side cross-sectional view showing a state at the time of packing tightening of a water stop joint at a pipe end according to the present embodiment, FIG. 2 is an enlarged detailed view of a portion B in FIG. 1, and FIG. Things
3 (a) is a side sectional view, FIG. 3 (b) is a sectional view taken along the line AA in FIG. 3 (a), and FIG. 4 is an enlarged detailed view of a portion C in FIG. 3 (a).
【００１７】本実施形態の管端部の止水継手は、既設埋
設管１内に引き込まれた引き込み鋼管２の先端部に沿っ
て取り付けられたリング形状のパッキング押え金具３
と、パッキング押え金具３とほぼ同形状をした締付押輪
４と、パッキング押え金具３と締付押輪４との間に配置
され、締付押輪４をパッキング押え金具３側に押し付け
たときに、管軸線方向に圧縮されるとともに、管径方向
に膨張して既設埋設管１の内周面に接触して、既設埋設
管１と引き込み鋼管２との接続部を止水する第１のリン
グ状ゴムパッキング５と、引き込み鋼管２と同径に設定
されてパッキング押え金具３の引き込み鋼管２に接続し
た側とは反対側の面に接続された短管６と、第１のリン
グ状ゴムパッキング５と締付押輪４の間に配置した一定
長さのスペーサ７と、スペーサ７と締付押輪４の間に配
置した第２のリング状ゴムパッキング８と、締付押輪４
の押付面に直交して接続されて、各リング状ゴムパッキ
ング５，８を締付押輪４を介してパッキング押え金具に
向けて付勢する締付部材１０と、締付部材１０に締め付
け力を付与する後述の締付手段とから構成され、締付押
輪４を締付部材１０を介して締付手段で締め付けた状態
下で、短管６のスペーサ部位に設けた注水孔９からスペ
ーサ７の位置する短管６と既設埋設管１の間に水を注入
することにより、既設埋設管１と引き込み鋼管２間の止
水部の水圧試験ができるようになっている。The watertight joint at the pipe end of the present embodiment is a ring-shaped packing press fitting 3 attached along the tip of the drawn steel pipe 2 drawn into the existing buried pipe 1.
And a clamping presser wheel 4 having substantially the same shape as the packing presser fitting 3, and disposed between the packing presser fitting 3 and the clamping presser presser 4, and when the clamping presser 4 is pressed against the packing presser fitting 3 side, A first ring shape that is compressed in the pipe axis direction, expands in the pipe radial direction, comes into contact with the inner peripheral surface of the existing buried pipe 1, and shuts off the connection between the existing buried pipe 1 and the drawn-in steel pipe 2. A rubber packing 5, a short pipe 6 which is set to have the same diameter as the drawn steel pipe 2 and is connected to a surface of the packing press fitting 3 opposite to the side connected to the drawn steel pipe 2, and a first ring-shaped rubber packing 5; A spacer 7 of a fixed length disposed between the spacer 7 and the pressing ring 4, a second ring-shaped rubber packing 8 disposed between the spacer 7 and the pressing ring 4,
A tightening member 10 which is connected orthogonally to the pressing surface of each of the above, and urges each ring-shaped rubber packing 5, 8 toward the packing press fitting via the tightening press ring 4, and a tightening force applied to the tightening member 10. And a tightening means, which will be described later, provided by a water injection hole 9 provided at a spacer portion of the short pipe 6 under a state where the tightening press wheel 4 is tightened by the tightening means via the tightening member 10. By injecting water between the located short pipe 6 and the existing buried pipe 1, a water pressure test of a water stop portion between the existing buried pipe 1 and the drawn-in steel pipe 2 can be performed.
【００１８】これを更に詳述すると、パッキング押え金
具３はリング形状をしており、リングの内径は、管内を
流れる流体の抵抗とならないように引き込み鋼管２の内
径Ｄ１とほぼ同寸法に、またリングの外径は、作業上支
障をきたさない範囲で既設埋設管１の内径Ｄ２に近い寸
法となるように設定されている。More specifically, the packing press fitting 3 is in the shape of a ring, and the inner diameter of the ring is set to be substantially the same as the inner diameter D1 of the steel pipe 2 so as not to cause resistance of the fluid flowing in the pipe. The outer diameter of the ring is set to be close to the inner diameter D2 of the existing buried pipe 1 within a range that does not hinder the operation.
【００１９】第１と第２のリング状ゴムパッキング５，
８は、それぞれ径方向の傾斜面を有する断面くさび状の
一対のリングパッキング５ａ，５ｂ及びリングパッキン
グ８ａ，８ｂの組み合わせからなり、締付手段により締
め付けられることにより、傾斜面に沿って径方向にも移
動し、既設埋設管１の内周面と短管６の外周面とに同時
に接触して、止水できるようになっている。First and second ring-shaped rubber packings 5,
Numeral 8 is a combination of a pair of ring packings 5a, 5b and ring packings 8a, 8b each having a wedge-shaped cross section having a radially inclined surface, and is fastened by a fastening means in the radial direction along the inclined surface. Also moves to contact the inner peripheral surface of the existing buried pipe 1 and the outer peripheral surface of the short pipe 6 at the same time, so that water can be stopped.
【００２０】スペーサ７は、既設埋設管１、短管６、第
１と第２のリング状ゴムパッキング５，８で形成される
空間内に配置された管軸方向の断面形状がＨ形をしたリ
ング状部材からなり、そのリングの内径および外径は、
当該スペーサ７が既設埋設管１と短管６の間で管軸線方
向に容易に摺動できる寸法に設定されている。The spacer 7 is disposed in a space formed by the existing buried pipe 1, the short pipe 6, and the first and second ring-shaped rubber packings 5, 8, and has a H-shaped cross section in the pipe axis direction. It consists of a ring-shaped member, the inner diameter and the outer diameter of the ring,
The spacer 7 is set to such a size that it can slide easily between the existing buried pipe 1 and the short pipe 6 in the pipe axis direction.
【００２１】締付押輪４は、スペーサ７と同様にリング
状の形状をしており、リングの内径および外径は、既設
埋設管１と短管６の間で容易に摺動できる寸法に設定さ
れている。The tightening press wheel 4 has a ring-like shape like the spacer 7, and the inner and outer diameters of the ring are set to dimensions that allow easy sliding between the existing buried pipe 1 and the short pipe 6. Have been.
【００２２】締付押輪４を締付部材１０を介してパッキ
ング押え金具３に向けて締め付ける締付手段は、締付部
材１０に直交して取り付けられた内径方向のリング状の
連結部材１１と、短管６内に取り付けられた内径方向の
リング状の固定部材１２と、連結部材１１に設けた貫通
孔と固定部材１２に設けた貫通孔とを貫通する通しボル
ト１３、及び通しボルト１３の連結部材１１と固定部材
１２を貫通した両端部に取り付けたナット１４，１４と
から構成され、各ナット１４，１４をボルト１３に螺合
させてねじ込むことにより、可動部材である連結部材１
１及び締付部材１０を介して締付押輪４に締付力を付与
するようになっている。The tightening means for tightening the tightening press wheel 4 toward the packing press fitting 3 via the tightening member 10 includes an inner diameter ring-shaped connecting member 11 mounted orthogonal to the tightening member 10. A ring-shaped fixing member 12 in the inner diameter direction attached to the short pipe 6, a through bolt 13 penetrating a through hole provided in the connecting member 11 and a through hole provided in the fixing member 12, and connection of the through bolt 13 The connecting member 1 which is a movable member is constituted by nuts 14, 14 attached to both ends penetrating the member 11 and the fixed member 12. The nuts 14, 14 are screwed into the bolts 13 and screwed.
A tightening force is applied to the tightening press wheel 4 via the tightening member 1 and the tightening member 10.
【００２３】本実施形態の管端部の止水継手において、
止水部の水圧試験を行うには、短管６に設けた注水孔９
（図２）から所定水圧の水を注水する。これにより、止
水部からの漏水がないか否かを確認することができる。In the water stop fitting at the pipe end of the present embodiment,
In order to conduct a water pressure test of the water stop section, the water injection hole 9 provided in the short pipe 6 is required.
Water of a predetermined water pressure is injected from (FIG. 2). Thereby, it is possible to confirm whether or not there is water leakage from the water stop portion.
【００２４】そして、水圧試験において止水部が所定の
水圧に耐え得ると確認されれば、注水孔９を溶接９ａ
（図４）して塞ぐとともに、締付部材１０を図３及び図
４のように短管６に溶接した後、管内を流れる流体の抵
抗となる連結部材１１、固定部材１２を切断し、通しボ
ルト１３及び各ナット１４，１４と共に撤去する。If it is confirmed in the water pressure test that the water stopping portion can withstand a predetermined water pressure, the water injection hole 9 is welded 9a.
(FIG. 4), and, after the fastening member 10 is welded to the short pipe 6 as shown in FIGS. 3 and 4, the connecting member 11 and the fixing member 12, which are the resistance of the fluid flowing in the pipe, are cut and threaded. The bolt 13 and the nuts 14, 14 are removed together.
【００２５】なお、その後、短管６と既設埋設管１の段
差部分を、止水継手の周辺にモルタルを打設して滑らか
に仕上げた上、塗装して止水性を高めるようにすること
が望ましい。After that, the stepped portion between the short pipe 6 and the existing buried pipe 1 is polished with mortar around the water-stop joint to finish it smoothly, and then painted to increase the water-stopping property. desirable.
【００２６】また、既設埋設管１が内面にモルタルを打
設した鋳鉄管の場合には、止水継手を配置する部分の内
面モルタルを撤去するとともに、鋳鉄管内周面の凹凸を
滑らかに仕上げた上塗装して、止水性を高めるようにす
ることが望ましい。In the case where the existing buried pipe 1 is a cast iron pipe in which mortar is cast on the inner surface, the inner mortar of the portion where the water-blocking joint is disposed is removed, and the unevenness of the inner peripheral surface of the cast iron pipe is smoothly finished. It is desirable to apply a top coat to increase the water stoppage.
【００２７】また、ここでは水圧試験後に短管６に溶接
される締付部材としてリング状の締付部材１０を例に挙
げて説明したが、これを例えば図５に示すような等間隔
に配置した複数の軸部材１５から構成してもよい。Further, here, the ring-shaped fastening member 10 has been described as an example of the fastening member to be welded to the short pipe 6 after the hydraulic test, but these are arranged at equal intervals as shown in FIG. 5, for example. A plurality of shaft members 15 may be used.
【００２８】[0028]
【発明の効果】以上述べたように、本発明によれば、第
１と第２のリング状ゴムパッキングの間に既設埋設管と
前記短管との間に隙間を形成するスペーサを配置すると
ともに、短管におけるスペーサに対応する部位に止水部
の水圧試験後に密閉される注水孔を設けたので、既設埋
設管と引き込み鋼管との接続部を止水することができ、
かつ管端止水部の水圧試験が可能となり、止水継手の信
頼性を向上させることができた。As described above, according to the present invention, the spacer for forming the gap between the existing buried pipe and the short pipe is disposed between the first and second ring-shaped rubber packings. Since a water injection hole that is sealed after the water pressure test of the water stop section is provided at a portion corresponding to the spacer in the short pipe, it is possible to stop the connection between the existing buried pipe and the drawn steel pipe,
In addition, a water pressure test of the water-end portion of the pipe was made possible, and the reliability of the water-stop joint was improved.
【００２９】また、第１と第２のリング状ゴムパッキン
グを、それぞれ径方向の傾斜面を有する断面くさび状の
一対のリングパッキングの組み合わせから構成したの
で、締付部材により締付押輪を介して第１と第２のリン
グ状ゴムパッキングをパッキング押え金具に向けて付勢
することで、第１と第２のリング状ゴムパッキングを、
既設埋設管の内周面と短管の外周面とに押圧することが
できて、止水性を向上させることができた。Further, since the first and second ring-shaped rubber packings are composed of a pair of ring packings each having a radially inclined surface and having a wedge-shaped cross section, the first and second ring-shaped rubber packings are formed by a fastening member via a fastening press ring. By urging the first and second ring-shaped rubber packings toward the packing presser, the first and second ring-shaped rubber packings are
It was possible to press against the inner peripheral surface of the existing buried pipe and the outer peripheral surface of the short pipe, thereby improving the water stoppage.
【００３０】また、締付部材を締付部材を介してパッキ
ング押え金具方向に締め付ける締付手段を、締付部材の
短管への固定後に撤去するようにしたので、管内を流れ
る流体の抵抗となる部材が無くすることができた。Further, the fastening means for fastening the fastening member in the direction of the packing presser via the fastening member is removed after the fastening member is fixed to the short pipe, so that the resistance of the fluid flowing in the pipe can be reduced. Can be eliminated.
【図１】本発明の一実施形態に係る管端部の止水継手の
パッキング締め付け時の状態を示す側面断面図である。FIG. 1 is a side cross-sectional view showing a state at the time of packing tightening of a water stop joint at a pipe end according to an embodiment of the present invention.
【図２】図１中のＢ部拡大詳細図である。FIG. 2 is an enlarged detail view of a portion B in FIG.
【図３】本実施形態の管端部の止水継手による更生完了
時の状態を示すもので、（ａ）は側面断面図、（ｂ）は
（ａ）中のＡ−Ａ矢視断面図である。FIGS. 3A and 3B show a state at the time of rehabilitation of a pipe end according to the present embodiment at the time of completion of a water-tight joint, wherein FIG. 3A is a side sectional view, and FIG. It is.
【図４】図３（ａ）中のＣ部拡大詳細図である。FIG. 4 is an enlarged detailed view of a portion C in FIG.
【図５】本実施形態の管端部の止水継手における締付部
材の他の例の説明図である。FIG. 5 is an explanatory view of another example of the fastening member in the water-end joint at the pipe end according to the present embodiment.
【図６】従来の管端部の止水継手を示すもので（ａ）は
正面図、（ｂ）は側面断面図である。6 (a) is a front view, and FIG. 6 (b) is a side sectional view, showing a conventional pipe end water stop joint.
【図７】図６（ｂ）中のＡ部拡大詳細図である。7 is an enlarged detailed view of a portion A in FIG. 6 (b).
１ 既設埋設管 ２ 引き込み鋼管 ３ パッキング押え金具 ４ 締付押輪 ５ 第１のリング状ゴムパッキング ５ａ，５ｂ リングパッキング ６ 短管 ７ スペーサ ８ 第２のリング状ゴムパッキング ８ａ，８ｂ リングパッキング ９ 注水孔 １０ 締付部材 １１ 連結部材（締付手段） １２ 固定部材（締付手段） １３ 通しボルト（締付手段） １４，１４ ナット １５ 軸部材（締付部材） DESCRIPTION OF SYMBOLS 1 Existing buried pipe 2 Pull-in steel pipe 3 Packing press fitting 4 Tightening press ring 5 First ring-shaped rubber packing 5a, 5b Ring packing 6 Short pipe 7 Spacer 8 Second ring-shaped rubber packing 8a, 8b Ring packing 9 Water injection hole 10 Tightening member 11 Connecting member (Tightening means) 12 Fixed member (Tightening means) 13 Through bolt (Tightening means) 14, 14 Nut 15 Shaft member (Tightening member)
───────────────────────────────────────────────────── フロントページの続き (72)発明者 石山 栄 東京都千代田区丸の内一丁目１番２号 日 本鋼管株式会社内 (72)発明者 中島 良和 東京都千代田区丸の内一丁目１番２号 日 本鋼管株式会社内 (72)発明者 笠原 一朗 東京都千代田区丸の内一丁目１番２号 日 本鋼管株式会社内 (72)発明者 荒川 崇 東京都千代田区大手町二丁目６番３号 新 日本製鐵株式会社内 (72)発明者 菊地 庄三 神奈川県横浜市中区錦町12番地 三菱重工 業株式会社横浜製作所内 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Sakae Ishiyama 1-1-2 Marunouchi, Chiyoda-ku, Tokyo Nihon Kokan Co., Ltd. (72) Inventor Yoshikazu Nakajima 1-1-2 Marunouchi, Chiyoda-ku, Tokyo Date (72) Inventor Ichiro Kasahara 1-1-2 Marunouchi, Chiyoda-ku, Tokyo Japan In-tube (72) Inventor Takashi Arakawa 2-6-1, Otemachi, Chiyoda-ku, Tokyo New Japan Inside Steel Works Co., Ltd. (72) Inventor Shozo Kikuchi 12 Nishikicho, Naka-ku, Yokohama-shi, Kanagawa Prefecture Mitsubishi Heavy Industries, Ltd.
Claims (3)
管の先端部に沿って取り付けられた該引き込み鋼管より
も大径のリング状のパッキング押え金具と、 前記引き込み鋼管と同径に設定されて、前記パッキング
押え金具の引き込み鋼管に取り付けた面とは反対側の面
に接続された短管と、 前記短管の外側に摺動自在に嵌合配置されて、前記パッ
キング押え金具と対向する締付押輪と、 前記締付押輪と前記パッキング押え金具との間に対向配
置された第１と第２のリング状ゴムパッキングと、 前記第１と第２のリング状ゴムパッキングの間に介在設
置されて、前記既設埋設管と前記短管との間に隙間を形
成するスペーサと、 予め前記短管における前記スペーサに対応する部位に形
成され、止水部の水圧試験後に密閉される注水孔と、 前記締付押輪をパッキング押え金具に向けて付勢した状
態で前記短管に固定される締付部材と、 を備えたことを特徴とする管端部の止水継手。1. A ring-shaped packing presser having a diameter larger than that of the drawn steel pipe attached along the tip of the drawn steel pipe drawn into the existing buried pipe, and having the same diameter as the drawn steel pipe. A short pipe connected to a surface of the packing press fitting opposite to the face attached to the drawn steel pipe; a tightening slidably fitted outside the short pipe and facing the packing press fitting; A pressing ring, first and second ring-shaped rubber packings disposed opposite to each other between the tightening pressing ring and the packing presser, and interposed between the first and second ring-shaped rubber packings. A spacer that forms a gap between the existing buried pipe and the short pipe; a water injection hole that is formed in advance in a portion of the short pipe corresponding to the spacer, and that is closed after a water pressure test of a water stop section; Tightening A watertight joint at the end of the pipe, comprising: a fastening member fixed to the short pipe in a state where the attached pressing ring is urged toward the packing press fitting.
を、それぞれ径方向の傾斜面を有する断面くさび状の一
対のリングパッキングの組み合わせから構成したことを
特徴とする請求項１記載の管端部の止水継手。2. The pipe end according to claim 1, wherein the first and second ring-shaped rubber packings are formed by combining a pair of ring packings each having a wedge-shaped cross section and having a radially inclined surface. Water stop fittings.
め付け、締付部材の短管への固定後に撤去される締付手
段を有することを特徴とする請求項１又は請求項２記載
の管端部の止水継手。3. The pipe end according to claim 1, further comprising a fastening means for fastening the fastening member in the direction of the packing presser fitting, and removing the fastening member after fixing the fastening member to the short pipe. Water stop fittings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001005587A JP3491151B2 (en) | 2001-01-12 | 2001-01-12 | Water stop fitting at pipe end |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001005587A JP3491151B2 (en) | 2001-01-12 | 2001-01-12 | Water stop fitting at pipe end |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2002213646A true JP2002213646A (en) | 2002-07-31 |
| JP3491151B2 JP3491151B2 (en) | 2004-01-26 |
Family
ID=18873618
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001005587A Expired - Fee Related JP3491151B2 (en) | 2001-01-12 | 2001-01-12 | Water stop fitting at pipe end |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3491151B2 (en) |
-
2001
- 2001-01-12 JP JP2001005587A patent/JP3491151B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP3491151B2 (en) | 2004-01-26 |
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