JP3491151B2 - Water stop fitting at pipe end - Google Patents
Water stop fitting at pipe endInfo
- Publication number
- JP3491151B2 JP3491151B2 JP2001005587A JP2001005587A JP3491151B2 JP 3491151 B2 JP3491151 B2 JP 3491151B2 JP 2001005587 A JP2001005587 A JP 2001005587A JP 2001005587 A JP2001005587 A JP 2001005587A JP 3491151 B2 JP3491151 B2 JP 3491151B2
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- ring
- tightening
- packing
- drawn
- 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.)
- Expired - Fee Related
Links
Landscapes
- Joints With Sleeves (AREA)
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 water shutoff joint for connecting a pipe end of a drawn-in steel pipe drawn inside an existing buried pipe and the existing buried pipe in a hermetically sealed state, for example, for old pipe rehabilitation work.
【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 of the methods for rehabilitating old pipes, an old pipe rehabilitation method in which a steel pipe or ordinary steel pipe is drawn inside an existing buried pipe such as a cast iron pipe and these steel pipes are used as a new pipeline. 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 method, in order to facilitate the rehabilitation work, 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. Therefore, in the case of rehabilitating a part of the existing pipeline consisting of the old pipe with the steel pipe (new pipe) as described above, place a water stop joint at the 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。As a conventional water shutoff joint for such a pipe end, for example, there is one disclosed in Japanese Utility Model Publication No. 4-33513. This conventional pipe end water stop joint is shown in FIG. 7 which is a front view of FIG. 6A, a side sectional view of FIG. 6B, and an enlarged detail view of an A portion in FIG. 6B. In addition, a ring-shaped packing holding metal fitting 23 attached along the tip of the drawn-in steel pipe 22 drawn into the existing underdrain (old pipe) 21, and a tightening clamp attached to the packing holding metal fitting 23 at equal intervals in the circumferential direction. Attaching bolt 24 and this tightening bolt 24
Has a hole into which the tightening bolt 24 is inserted, and the ring-shaped tightening push ring 25 is slidable along the tightening bolt 24, the existing underdrain (old pipe) 21, and the packing holding metal fitting 23. Rubber packings 26a and 26 provided in a ring shape in a space formed by the tightening bolt 24 and the tightening push ring 25.
b and a nut 27 for tightening these rubber packings 26a, 26b in the direction of the packing pressing metal fitting 23 via the tightening push 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 diameters of the packing holding metal fitting 23 and the tightening push ring 25 are larger than the outer diameter of the drawn steel pipe (new pipe) 22, and the inner diameters of the packing holding metal fitting 23 and the tightening push ring 25 are the drawn steel pipe (new pipe). The inner diameter of the tube 22 is almost 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。Further, the rubber packing 26a and the rubber packing 26b have inclined surfaces which are in contact with each other, and when they are compressed in the tube axial direction, both are deformed in the tube radial direction while sliding on the inclined surfaces. Has been done.
【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。With this water shutoff joint, the existing underdrain (old pipe) 21
When stopping the water connection at the connection between the drawn steel pipe (new pipe) 22 and the pipe, the packing holding metal fitting 23 is welded to the pipe end of the drawn steel pipe (new pipe) 22 with the existing underdrain (old pipe) 21 wrapped. After that, the rubber packing 26a and the rubber packing 26b are inserted into the space formed by the existing underdrain (old pipe) 21, the packing holding metal 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 for inserting the tightening bolt 24 is aligned with the tightening bolt 24 so that the tightening push ring 2
5 is attached to the packing holding metal fitting 23, the nut 27 is screwed into the tightening bolt 24, and the tightening push ring 25 is pushed into the packing holding metal fitting 23 side.
【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 push-wheel 25 is pushed in, the rubber packings 26a and 26b are sandwiched between the packing holding metal fitting 23 and the tightening push-wheel 25, axially compressed and expanded in the radial direction, and the existing underdrain. The inner peripheral surface of 21 is contacted, and due to its elasticity, water is stopped between the existing underdrain (old pipe) 21 and drawn-in 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 placed around the water stop joint so that the inner diameter of the pipe transitions smoothly from the size of the drawn steel pipe 22 to the size of the existing underdrain (old pipe) 21. A taper is formed by the mortar 28.
【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 of the pipe end disclosed in Japanese Utility Model Publication No. 4-33513, the rubber packing is composed of the packing press fitting 23 and the tightening push ring 25. Since the water is stopped by directly sandwiching it, the water pressure test of the water stop part of the water stop joint cannot be performed, and there is a difficulty in knowing whether or not 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 conduct a water pressure test on a water shut off portion of a water shut off joint so that the water pressure resistance of the water shut off joint can be confirmed and the 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, a water stop joint at a pipe end is larger than a drawn-in steel pipe installed along a tip of a drawn-in steel pipe drawn into an existing buried pipe. Diameter ring-shaped packing holding metal fittings and short pipes that are set to the same diameter as the drawing steel pipe and are connected to the surface of the packing holding metal fittings that is opposite to the surface attached to the drawing steel pipe, and slide on the outside of the short pipe. A tightening push ring that is movably fitted and arranged to face the packing retainer; first and second ring-shaped rubber packings that face each other between the clamp retainer and the packing retainer; A spacer that is interposed between the second ring-shaped rubber packings and forms a gap between the existing buried pipe and the short pipe, and a water pressure of the water shutoff portion that is formed in advance at a portion corresponding to the spacer in the short pipe. Water injection hole sealed after the 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, there is provided a water stop joint for a pipe end, 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 radial inclined surfaces. 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。Further, the water stop joint at the pipe end according to claim 3 has a fastening means for fastening the fastening member in the direction of the packing holding metal fitting and removing it 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。BEST MODE FOR CARRYING OUT THE INVENTION A water stop joint for 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 when packing a water shutoff joint of a pipe end portion according to the present embodiment when packing is tightened, FIG. 2 is an enlarged detailed view of a portion B in FIG. 1, and FIG. 3 shows a state after completion of rehabilitation. 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 C portion 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 water stop joint at the pipe end of the present embodiment is a ring-shaped packing holding metal fitting 3 attached along the tip of a drawn-in steel pipe 2 drawn into an existing buried pipe 1.
And a tightening push ring 4 having substantially the same shape as the packing holding metal fitting 3, and is arranged between the packing holding metal fitting 3 and the tightening pressing gear 4, and when the tightening push wheel 4 is pressed to the packing holding metal fitting 3 side, A first ring shape that is compressed in the pipe axis direction, expands in the pipe radial direction, contacts the inner peripheral surface of the existing buried pipe 1, and stops the connection between the existing buried pipe 1 and the drawn-in steel pipe 2. The rubber packing 5, a short pipe 6 having the same diameter as the retracted steel pipe 2 and connected to the surface of the packing holding metal fitting 3 opposite to the side connected to the retracted steel pipe 2, and the first ring-shaped rubber packing 5 A spacer 7 having a constant length arranged between the spacer 7 and the tightening push wheel 4, a second ring-shaped rubber packing 8 arranged between the spacer 7 and the tightening push wheel 4, and the tightening push wheel 4
Of the ring-shaped rubber packings 5 and 8 which are connected orthogonally to the pressing surface of the pressing member 10 for urging the ring-shaped rubber packings 5 and 8 toward the packing pressing metal fittings through the tightening pressing wheel 4, and a tightening force to the tightening member 10. The tightening push-wheel 4 is tightened by the tightening means via the tightening member 10, and the tightening push-wheel 4 is tightened by the tightening means described later. By injecting water between the located short pipe 6 and the existing buried pipe 1, the water pressure test of the water blocking part 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 retainer 3 has a ring shape, and the inner diameter of the ring is approximately the same as the inner diameter D1 of the drawn-in steel pipe 2 so as not to resist 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 work.
【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。The first and second ring-shaped rubber packings 5,
Reference 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, each having an inclined surface in the radial direction. Also, the water can be stopped by contacting the inner peripheral surface of the existing buried pipe 1 and the outer peripheral surface of the short pipe 6 at the same time.
【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 arranged in the space formed by the existing buried pipe 1, the short pipe 6, and the first and second ring-shaped rubber packings 5 and 8 and has an H-shaped cross section in the pipe axial direction. It consists of a ring-shaped member, and the inner and outer diameters of the ring are
The spacer 7 is set to have such a size that it can easily slide in the pipe axis direction between the existing buried pipe 1 and the short pipe 6.
【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。Like the spacer 7, the tightening push ring 4 has a ring shape, and the inner diameter and the outer diameter of the ring are set so that they can be easily slid between the existing buried pipe 1 and the short pipe 6. Has been done.
【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 push wheel 4 toward the packing pressing metal fitting 3 through the tightening member 10 is an inner diameter ring-shaped connecting member 11 mounted orthogonal to the tightening member 10. Ring-shaped fixing member 12 mounted in the short pipe 6 in the inner diameter direction, through bolts 13 penetrating through holes provided in the connecting member 11 and through holes provided in the fixing member 12, and connection of the through bolts 13 It is composed of a member 11 and nuts 14 and 14 attached to both ends of the fixing member 12 so as to penetrate therethrough.
A tightening force is applied to the tightening push 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 joint at the pipe end of the present embodiment,
In order to perform the water pressure test of the water shutoff part, the water injection hole 9 provided in the short pipe 6 is used.
Water with a predetermined water pressure is injected from (Fig. 2). This makes it possible to confirm whether or not there is water leakage from the water shut off 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。Then, if it is confirmed in the water pressure test that the water stop portion can withstand a predetermined water pressure, the water injection hole 9 is welded 9a.
(FIG. 4), the fastening member 10 is welded to the short pipe 6 as shown in FIGS. 3 and 4, and then the connecting member 11 and the fixing member 12 which become the resistance of the fluid flowing in the pipe are cut and passed. 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 step portion between the short pipe 6 and the existing buried pipe 1 may be mortar-pourged around the water-stop joint to make it smooth, and then painted to enhance the water-stop 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。When the existing buried pipe 1 is a cast iron pipe in which mortar is cast on the inner surface, the inner surface mortar in the portion where the water stop joint is arranged is removed and the unevenness on the inner peripheral surface of the cast iron pipe is finished smoothly. It is desirable to apply a top coat so as to improve the waterproofness.
【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, although the ring-shaped tightening member 10 has been described as an example of the tightening member welded to the short pipe 6 after the water pressure test, it is arranged at equal intervals as shown in FIG. 5, for example. You may comprise from the some shaft member 15 which did.
【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 a gap between the existing buried pipe and the short pipe is arranged between the first and second ring-shaped rubber packings. Since the water injection hole that is sealed after the water pressure test of the water shut off portion is provided at the portion corresponding to the spacer in the short pipe, the connection between the existing buried pipe and the drawn-in steel pipe can be shut off.
Moreover, the water pressure test of the water stop part of the pipe end became possible, and the reliability of the water stop joint could be 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 constituted by a combination of a pair of ring packings each having a wedge-shaped cross section and each having a radial inclined surface, a tightening member is used to press the tightening push ring. By urging the first and second ring-shaped rubber packings toward the packing retainer, 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, and to improve the water blocking performance.
【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, since the tightening means for tightening the tightening member in the direction of the packing pressing metal fitting through the tightening member is removed after fixing the tightening member to the short pipe, the resistance of the fluid flowing in the pipe is reduced. It was possible to eliminate the parts that became.
【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 tightening packing of a water stop joint of a pipe end portion 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 detailed view of a B part 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。3A and 3B show a state at the time of completion of rehabilitation by a water stop joint of a pipe end portion of the present embodiment, FIG. 3A is a side sectional view, and FIG. 3B is a sectional view taken along the line AA in FIG. 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 C portion 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 stop joint of the pipe end portion of 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。6A and 6B show a conventional water shutoff joint for a pipe end, where FIG. 6A is a front view and FIG. 6B is a side sectional view.
【図７】図６（ｂ）中のＡ部拡大詳細図である。FIG. 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） 1 Existing buried pipe 2 Draw-in steel pipe 3 Packing holder 4 Tightening push 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 Connection member (tightening means) 12 Fixing member (tightening means) 13 Through bolt (tightening means) 14,14 nuts 15 Shaft member (tightening member)
───────────────────────────────────────────────────── フロントページの続き (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 (56)参考文献 特開 昭62−209296（ＪＰ，Ａ) 特開 平10−73190（ＪＰ，Ａ) 実開 平１−75676（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) F16L 1/00 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Yoshikazu Nakajima 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Japan Steel Pipe Co., Ltd. (72) Ichiro Kasahara 1-2-1 Marunouchi, Chiyoda-ku, Tokyo Nippon Steel Pipe (72) Inventor Takashi Arakawa 2-3-6 Otemachi, Chiyoda-ku, Tokyo Shin Nippon Steel Co., Ltd. (72) Inventor Shozo Kikuchi 12 Nishiki-cho, Naka-ku, Yokohama-shi, Kanagawa Mitsubishi Heavy Industries Ltd. Company Yokohama Manufacturing Co., Ltd. (56) Reference JP 62-209296 (JP, A) JP 10-73190 (JP, A) Fukui 1-75676 (JP, U) (58) Fields investigated (Int .Cl. 7 , DB name) F16L 1/00
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 holding fitting having a diameter larger than that of the drawn-in steel pipe, which is attached along the tip of the drawn-in steel pipe drawn into the existing buried pipe, and has the same diameter as the drawn-in steel pipe, A short pipe connected to the surface of the packing holding metal fitting opposite to the surface attached to the pull-in steel pipe, and a fitting which is slidably fitted on the outside of the short pipe and is opposed to the packing holding metal fitting. A push ring, first and second ring-shaped rubber packings that are arranged to face each other between the tightening push ring and the packing holding metal fitting, and are 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; and a water injection hole that is formed in a portion corresponding to the spacer in the short pipe in advance and that is sealed after a water pressure test of the water shutoff portion, Tighten And a tightening member fixed to the short pipe in a state in which the biasing push ring is biased toward the packing pressing metal fitting, and a water stop joint at a pipe end.
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 constituted by a combination of a pair of ring packings each having a wedge-shaped cross section and having radial inclined surfaces. Part water stop fitting.
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 or 2, further comprising a fastening means for fastening the fastening member in the direction of the packing holding metal fitting and removing the fastening member after fixing the fastening member to the short pipe. Part water stop fitting.
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 JP2002213646A (en) | 2002-07-31 |
| JP3491151B2 true 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 |
|---|---|
| JP2002213646A (en) | 2002-07-31 |
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