JPH0751993B2 - Liquid inflow prevention plug for branch pipe - Google Patents
Liquid inflow prevention plug for branch pipeInfo
- Publication number
- JPH0751993B2 JPH0751993B2 JP63235857A JP23585788A JPH0751993B2 JP H0751993 B2 JPH0751993 B2 JP H0751993B2 JP 63235857 A JP63235857 A JP 63235857A JP 23585788 A JP23585788 A JP 23585788A JP H0751993 B2 JPH0751993 B2 JP H0751993B2
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- branch pipe
- fitting member
- liquid
- main pipe
- 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 - Lifetime
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/10—Means for stopping flow from or in pipes or hoses
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は，下水管等の埋設本管を合成樹脂にてライニン
グする際に，該本管から分岐した分岐管の該本管に連通
する端部に装着されて該分岐管内への液体の流入防止す
る液体流入防止栓に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention communicates with a main pipe of a branch pipe branched from the main pipe when lining an embedded main pipe such as a sewer pipe with a synthetic resin. The present invention relates to a liquid inflow prevention plug that is attached to an end portion and that prevents a liquid from flowing into the branch pipe.
（従来の技術） 上水道や下水道として使用される埋設管には，古くから
金属管やヒューム管が採用されている。このような埋設
管は，長期の使用によって老朽化し、腐蝕による損傷，
ヒビ割れ等が生じて漏水するおそれがある。このため，
最近では，老朽化した埋設管内に合成樹脂製の管を挿入
してライニングすることが行われている。(Prior Art) Metal pipes and fume pipes have long been used for buried pipes used for water supply and sewerage. Such buried pipes deteriorate over time and are damaged by corrosion.
There is a risk of cracks and other water leakage. For this reason,
Recently, it has been practiced to insert a synthetic resin pipe into an aged buried pipe for lining.
このようなライニング工法において，例えば特開昭61−
38031号公報には，本管から多数の分岐管が分岐した埋
設本管を合成樹脂管にてライニングする場合に，各分岐
管から本管内に下水が流れ込まないように，各分岐管を
止水する方法が開示されている。該公報では，止水栓と
してゴム栓が使用され，該ゴム栓を分岐管内に圧入する
ことにより，該分岐管を止水する。In such a lining method, for example, Japanese Patent Laid-Open No. 61-
In 38031, when burying an embedded main pipe in which a large number of branch pipes branch from the main pipe with a synthetic resin pipe, each branch pipe is stopped so that sewage does not flow into the main pipe. A method of doing so is disclosed. In this publication, a rubber plug is used as a water stop plug, and the branch pipe is stopped by pressing the rubber plug into the branch pipe.
（発明が解決しようとする課題） 既設本管を合成樹脂管にてライニングする場合において
も，通常，該本管に連結された各分岐管には，生活排水
等の下水，湧水が通流される。このため，前記公報のよ
うに，分岐管端部に止水栓を装着すれば，分岐管を通流
する下水等は止水されて本管内には流入しない。しか
し，止水される下水等の増加により，該止水栓には，分
岐管から本管に向けての圧力が増加する。通常，既設本
管は地上から3m程度の深さの地中に埋設されているた
め，分岐管内に装着された止水栓には最大で0.3kg・f/c
m2程度の水圧が加わる。前記公報のように，該分岐管に
止水栓としてゴム栓を圧入しただけであれば，該ゴム栓
が止水される下水等の圧力により分岐管から抜けるおそ
れがある。(Problems to be Solved by the Invention) Even when an existing main pipe is lined with a synthetic resin pipe, normally, sewage such as domestic wastewater and spring water flow through each branch pipe connected to the main pipe. Be done. For this reason, as in the above publication, if a water stopcock is attached to the end of the branch pipe, the sewage flowing through the branch pipe is stopped and does not flow into the main pipe. However, the pressure from the branch pipe to the main pipe increases in the water stopcock due to an increase in the sewage that is stopped. Normally, the existing main pipe is buried in the ground at a depth of about 3 m from the ground, so the maximum of 0.3 kgf / c for the stopcock installed in the branch pipe.
Water pressure of about m 2 is applied. As described in the above publication, if a rubber stopper is simply press-fitted into the branch pipe as a water stopper, the rubber stopper may come off from the branch pipe due to the pressure of sewage or the like.
既設本管を合成樹脂管等でライニングする場合には，該
本管と該本管をライニングする合成樹脂管との間に裏込
め剤が充填される。裏込め剤は，通常,0.5kg・f/cm2程
度の圧力により充填されるため，分岐管の端部に装着さ
れた止水栓には，止水される下水等の圧力とは反対に，
裏込め剤にて分岐管内へ押し込む力が作用し，該止水栓
が分岐管内に押し込められるおそれがある。合成樹脂管
が本管内に裏込め剤にて固定されると，該合成樹脂管内
から分岐管内に連通するように該合成樹脂管，裏込め
剤，および止水栓を挿通する貫通孔を開設し，分岐管を
通流する下水等を本管内に流入させなければならない。
このためには，合成樹脂管内から穿孔しなければならな
いが，前述のようにして，止水栓が分岐管内に押込めら
れると，裏込め剤が分岐管内へ流入し，穿孔のためのス
トロークが大きくなる。合成樹脂管の内径は比較的小さ
く，該合成樹脂管内から穿孔する際に，穿孔のためのス
トロークを大きくすることは非常に困難であるため，止
水栓が分岐管内に押込められて裏込め剤が流入すると，
止水栓に貫通孔を開設することができなくなるおそれが
ある。When the existing main pipe is lined with a synthetic resin pipe or the like, a back-filling agent is filled between the main pipe and the synthetic resin pipe lining the main pipe. Since the backfilling agent is usually filled with a pressure of about 0.5 kgf / cm 2, the water stopcock attached to the end of the branch pipe is opposite to the pressure of the sewage to be stopped. ，
The back-filling agent acts to push the water stop plug into the branch pipe, and the water shutoff plug may be pushed into the branch pipe. When the synthetic resin pipe is fixed in the main pipe with a backfilling agent, a through-hole for inserting the synthetic resin pipe, the backfilling agent, and the water stopcock is opened so that the synthetic resin pipe communicates with the branch pipe. The sewage flowing through the branch pipe must flow into the main pipe.
For this purpose, it is necessary to perforate from the inside of the synthetic resin pipe, but as described above, when the water stopcock is pushed into the branch pipe, the backfilling agent flows into the branch pipe, and the stroke for perforation is increased. growing. Since the synthetic resin pipe has a relatively small inner diameter and it is very difficult to increase the stroke for punching when punching from inside the synthetic resin pipe, the water stopcock is pushed into the branch pipe and backfilled. When the agent flows in,
There is a risk that it may not be possible to open a through hole in the water stopcock.
止水栓が，分岐管を通流する下水，および本管内に充填
される裏込め剤の双方から加わる圧力に耐え得るように
するために，該止水栓外周面と分岐管内周面との接触圧
を大きくすることが考えられる。このために，例えば，
止水栓の径を大きくすれば，該止水栓を分岐管内に圧入
することが困難になる。また，止水栓を分岐管の軸心方
向に長くすれば、止水栓に貫通孔を形成することができ
なくなるおそれがある。In order to allow the water stopcock to withstand the pressure exerted by both the sewage flowing through the branch pipe and the backfilling agent filled in the main pipe, the waterstop outer peripheral surface and the branch pipe inner peripheral surface are It is possible to increase the contact pressure. To do this, for example,
If the diameter of the water stopcock is increased, it becomes difficult to press the water stopcock into the branch pipe. Further, if the water stopcock is elongated in the axial direction of the branch pipe, it may not be possible to form a through hole in the water stopcock.
本発明は，上記従来の問題を解決するものであり，その
目的は，分岐管内を通流する下水等により分岐管からは
ずれるおそれがなく，しかも，本管内に充填される裏込
め剤が分岐管内に流入することを確実に防止し得る分岐
管内への液体流入防止栓を提供することにある。The present invention is to solve the above-mentioned conventional problems, and its purpose is to prevent the backfilling agent filled in the main pipe from entering the branch pipe due to the possibility that the sewage flowing in the branch pipe will not disengage the branch pipe. It is an object of the present invention to provide a liquid inflow preventing plug into a branch pipe that can reliably prevent the inflow of the liquid into the branch pipe.
（課題を解決するための手段） 本発明の分岐管の液体流入防止栓は本管から分岐した分
岐管の該本管に連通する端部に装着されて，該分岐管内
への液体の流入を防止する分岐管の液体流入防止栓であ
って，該分岐管の端部内に嵌合されて該端部内周面に液
密に圧着されると共に，その内部を液体が通流し得る嵌
合部材と，該嵌合部材が該分岐管の端部に嵌合された場
合に，該嵌合部材内を該分岐管内から本管内へのみ液体
を通流させるべく該嵌合部材に設けられた逆止弁と，該
嵌合部材が分岐管の端部に嵌合された場合に，本管内周
面に係止して該嵌合部材が分岐管内へ侵入することを防
止すべく該嵌合部材に取付けられた係止部材と，を具備
してなり，そのことにより上記目的が達成される。(Means for Solving the Problem) The liquid inflow prevention plug of the branch pipe of the present invention is attached to an end portion of the branch pipe branched from the main pipe and communicating with the main pipe to prevent the liquid from flowing into the branch pipe. A liquid inflow prevention plug of a branch pipe for preventing, which is fitted into an end portion of the branch pipe, is pressure-tightly liquid-tightly attached to an inner peripheral surface of the end portion, and has a fitting member through which a liquid can flow. , When the fitting member is fitted to the end portion of the branch pipe, a non-return check provided on the fitting member for allowing the liquid to flow through the fitting member only from the inside of the branch pipe to the inside of the main pipe. When the valve and the fitting member are fitted to the end of the branch pipe, the fitting member is locked to the inner peripheral surface of the main pipe to prevent the fitting member from entering the branch pipe. And an attached locking member, whereby the above object is achieved.
（実施例） 以下に本発明を実施例について説明する。(Example) Hereinafter, the present invention will be described with reference to Examples.
本発明の分岐管内への液体流入防止栓は，第１図に示す
ように，例えば，老朽化した下水管の本管２を，合成樹
脂管にてライニングするに際して，該本管２から分岐す
る分岐管３の該本管２に連通する端部に装着されて使用
される。The liquid inflow prevention plug into the branch pipe of the present invention is branched from the main pipe 2 when the main pipe 2 of an aged sewer pipe is lined with a synthetic resin pipe as shown in FIG. It is used by being attached to the end of the branch pipe 3 that communicates with the main pipe 2.
該液体流入防止栓１は，矩形状の平板を該本管２の内周
面に沿うように湾曲させた係止板10を有する。該係止板
10の各辺は，分岐管３の内径よりも長くなっている。該
係止板10の中央部には透孔11が設けられており，該透孔
11に，逆止弁20における円筒状をした弁座21が嵌合され
ている。逆止弁20における該弁座21は，係止板10の透孔
11に嵌合される円筒状の基端部21aと，先細り状に縮径
されたテーパ部21bを介して連設され，該基端部21aより
小径となった本体部21cとを有する。そして，該弁座21
のテーパ部21b内に弁体22が配設されている。該弁体22
は，該テーパ部21bの軸心とは直交するように配設され
た円板状の弁本体22aと，該弁本体22aの直径に沿って，
弁座21の本体部21c内に突出する支持部22bとを有する。
円板状の弁本体22aは，支持部22bにて分割される半円状
の各半体が，弁座21の基端部21a内に回動し得るよう
に，該支持部22bの各側方に隣接した弁本体22aの基端部
21a側部分が該支持部22bに沿ってそれぞれ切欠されて薄
肉となっている。該弁本体22aにおける弁座21の本体部2
1cに対向する側面の外周縁は，弁座21のテーパ部21b内
周面に圧接され得る大きさをしており，その圧接により
両者は液密状態となる。従って，該逆止弁20は，弁座21
の本体部21c側から通流する液体により，弁体22の弁本
体22aが回動されて開状態となり，該液体が弁座21内を
通流し得るが，反対方向に向って液体が通流する場合
は，弁体22の弁本体22a外周縁が弁座21のテーパ部21b内
周面に圧接されて液密状態となった閉状態となり，該液
体は弁座21内を通流することができない。The liquid inflow prevention plug 1 has a locking plate 10 formed by bending a rectangular flat plate along the inner peripheral surface of the main pipe 2. The locking plate
Each side of 10 is longer than the inner diameter of the branch pipe 3. A through hole 11 is provided at the center of the locking plate 10.
A valve seat 21 having a cylindrical shape in the check valve 20 is fitted in the check valve 11. The valve seat 21 of the check valve 20 is a through hole of the locking plate 10.
It has a cylindrical base end portion 21a fitted in 11 and a main body portion 21c which is continuously provided via a taper portion 21b having a tapered diameter and has a smaller diameter than the base end portion 21a. And the valve seat 21
The valve body 22 is arranged in the tapered portion 21b. The valve body 22
Is a disc-shaped valve body 22a arranged so as to be orthogonal to the axis of the tapered portion 21b, and along the diameter of the valve body 22a,
The valve seat (21) has a support portion (22b) protruding into the main body portion (21c).
The disc-shaped valve main body 22a is provided on each side of the support portion 22b so that each half-circular half body divided by the support portion 22b can rotate within the base end portion 21a of the valve seat 21. Proximal end of the valve body 22a adjacent to
The portion on the side of 21a is cut out along the supporting portion 22b to be thin. The body portion 2 of the valve seat 21 in the valve body 22a
The outer peripheral edge of the side surface facing 1c is sized so that it can be pressed against the inner peripheral surface of the tapered portion 21b of the valve seat 21, and due to the pressure contact, both are in a liquid-tight state. Therefore, the check valve 20 includes a valve seat 21
The liquid flowing from the main body 21c side of the valve body 22 causes the valve main body 22a of the valve body 22 to rotate to an open state so that the liquid can flow through the valve seat 21, but the liquid flows through in the opposite direction. In this case, the outer peripheral edge of the valve body 22a of the valve body 22 is pressed against the inner peripheral surface of the tapered portion 21b of the valve seat 21 to become a liquid-tight closed state, and the liquid flows through the valve seat 21. I can't.
該逆止弁20の円筒状をした弁座21には，環状の嵌合部材
30が外嵌されている。該嵌合部材30はゴム等のように伸
縮性を有する素材にてチューブ状に形成されている。該
嵌合部材30の内周面は，弁座21の外周面に液密に接着さ
れている。該嵌合部材30は，その内部に気体を充填させ
るためのエアー注入弁31を有する。そして該嵌合部材30
内に気体を充満させた状態では，該嵌合部材30は係止板
10の外周縁部を除いた透孔11の周囲に圧着される。この
ような状態で，該嵌合部材30を分岐管３に圧入すれば，
その外周面は，該分岐管３内周面に液密に圧着される。The check valve 20 has a cylindrical valve seat 21 with an annular fitting member.
30 is fitted. The fitting member 30 is formed in a tube shape from a stretchable material such as rubber. The inner peripheral surface of the fitting member 30 is liquid-tightly bonded to the outer peripheral surface of the valve seat 21. The fitting member 30 has an air injection valve 31 for filling gas therein. And the fitting member 30
When the inside is filled with gas, the fitting member 30 is a locking plate.
It is crimped around the through hole 11 excluding the outer peripheral edge portion of 10. If the fitting member 30 is press-fitted into the branch pipe 3 in such a state,
The outer peripheral surface is liquid-tightly pressure-bonded to the inner peripheral surface of the branch pipe 3.
上記嵌合部材30は，係止板10を分岐管３の周縁に当接さ
せた状態でエアー注入弁31からエアーを注入することに
より膨張させるようにしてもよい。The fitting member 30 may be expanded by injecting air from the air injection valve 31 in a state where the locking plate 10 is in contact with the peripheral edge of the branch pipe 3.
このような構成の本発明の分岐管の液体流入防止栓１
は，老朽化した下水管の本管２を合成樹脂製の螺旋管に
てライニングして更生するライニング工法に使用され
る。このライニング工法において，本管２内に螺旋管を
挿入する工程に先立ち，本発明の分岐管の液体流入防止
栓１が分岐管３の端部内に装着される。The above-structured branch pipe liquid inflow preventing plug 1 of the present invention
Is used for a lining method in which the main pipe 2 of an aged sewer pipe is lined with a spiral pipe made of synthetic resin to be rehabilitated. In this lining method, prior to the step of inserting the spiral pipe into the main pipe 2, the liquid inflow prevention plug 1 of the branch pipe of the present invention is mounted in the end portion of the branch pipe 3.
該液体流入防止栓１は，嵌合部材30に気体を充填して，
該嵌合部材30を膨張させ，本管２内から分岐管３内へ，
係止板10を本管２内に位置させた状態で，該嵌合部材30
を圧入する。これにより，嵌合部材30の外周面は分岐管
３端部の内周面に圧着され，該嵌合部材30外周面と該分
岐管３内周面とが液密状態になる。このとき，係止板10
の外周縁部は分岐管３内には入り込まず，本管２内に位
置して，該本管２内周面に係止される。このようにし
て，液体流入防止栓１が分岐管３内に装着される。The liquid inflow prevention plug 1 is configured by filling the fitting member 30 with gas,
The fitting member 30 is expanded to move the main pipe 2 into the branch pipe 3,
With the locking plate 10 positioned inside the main pipe 2, the fitting member 30
Press fit. As a result, the outer peripheral surface of the fitting member 30 is pressed against the inner peripheral surface of the end of the branch pipe 3, and the outer peripheral surface of the fitting member 30 and the inner peripheral surface of the branch pipe 3 are in a liquid-tight state. At this time, the locking plate 10
The outer peripheral edge portion of is not located in the branch pipe 3 but is located in the main pipe 2 and is locked to the inner peripheral surface of the main pipe 2. In this way, the liquid inflow prevention plug 1 is mounted in the branch pipe 3.
該液体流入防止栓１の分岐管３への装着に際して，例え
ば本管２の内径が，作業員が入り込めないような小径の
場合は，適当な栓装着装置が使用される。該栓装着装置
は，例えば液体流入防止栓１が載置されて昇降する昇降
部と，該昇降部を搬送する搬送部とにより構成される。When the liquid inflow prevention plug 1 is attached to the branch pipe 3, for example, when the inner diameter of the main pipe 2 is small so that an operator cannot enter, an appropriate plug attachment device is used. The stopper mounting device is composed of, for example, an elevating section on which the liquid inflow prevention stopper 1 is placed and which moves up and down, and a conveying section which conveys the elevating section.
該液体流入防止栓１が装着された分岐管３内には，下水
等が通流するが，該分岐管３内を通流する下水等は，液
体流入防止栓１における嵌合部材30に内嵌された逆止弁
20の弁座21内に流入し，所定量が滞留した後に，その弁
体22を回動させて本管２内へ通流される。Sewage or the like flows into the branch pipe 3 in which the liquid inflow prevention plug 1 is mounted, but the sewage or the like flowing in the branch pipe 3 enters the fitting member 30 of the liquid inflow prevention plug 1. Check valve fitted
After flowing into the valve seat 21 of 20 and staying a predetermined amount, the valve body 22 is rotated to flow into the main pipe 2.
このように，液体流入防止栓１の逆止弁20を通って，下
水等が本管２内に流入する状態で，該本管２内に合成樹
脂製の螺旋管が挿入される。該螺旋管は，例えば，該本
管２の一端が連結されたマンホール内に設置された製管
機により製造される。該製管機には，合成樹脂製の帯状
体が順次導入され，該製管機は，該帯状体を螺旋状に巻
回して巻回された帯状体の相隣する側縁部同士を係止状
態として螺旋管を製造する。そして，該製管機にて製造
される螺旋管が，直接，本管２内に挿入される。In this way, the spiral pipe made of synthetic resin is inserted into the main pipe 2 in a state where the sewage or the like flows into the main pipe 2 through the check valve 20 of the liquid inflow prevention plug 1. The spiral pipe is manufactured by, for example, a pipe making machine installed in a manhole to which one end of the main pipe 2 is connected. Synthetic resin strips are sequentially introduced into the pipe-making machine, and the pipe-making machine spirally winds the strip-shaped body to engage adjacent side edges of the wound strip-shaped body. The spiral tube is manufactured in a stopped state. Then, the spiral pipe manufactured by the pipe manufacturing machine is directly inserted into the main pipe 2.
このようにして螺旋管は本管２内に順次挿入される。こ
のとき，本管２内には，分岐管３に装着された液体流入
防止栓１の逆止弁20を通って下水等が流入しているが，
螺旋管の本管２内への挿入には支障がない。本管２内に
螺旋管が挿入すると，本管２内に流入した下水等は，該
本管２と螺旋管との間を通流する。In this way, the spiral tube is sequentially inserted into the main tube 2. At this time, sewage or the like flows into the main pipe 2 through the check valve 20 of the liquid inflow prevention plug 1 attached to the branch pipe 3,
There is no problem in inserting the spiral tube into the main tube 2. When the spiral pipe is inserted into the main pipe 2, the sewage and the like flowing into the main pipe 2 flows between the main pipe 2 and the spiral pipe.
次いで，本管２と螺旋管との間に，裏込め剤が例えば,
0.5kg・f/cm2程度の圧力にて充填される。裏込め剤は，
本管２の一方の端部から，該本管２と螺旋管との間隙内
に充填される。これにより，本管２内の下水等は，裏込
め剤にて順次本管２の他方の端部から押し出される。Then, between the main pipe 2 and the spiral pipe, a backfilling agent, for example,
It is filled at a pressure of about 0.5 kgf / cm 2 . The backfill agent is
The gap between the main pipe 2 and the spiral pipe is filled from one end of the main pipe 2. As a result, sewage and the like in the main pipe 2 is sequentially pushed out from the other end of the main pipe 2 by the backfilling agent.
本管２と螺旋管との間に充填される裏込め剤は，該本管
２に連結された分岐管３内へ流入しようとする。しか
し，該分岐管３の端部には，本発明の液体流入防止栓１
が装着されているため，裏込め剤は該液体流入防止栓１
における逆止弁20の弁座21内に流入し，該弁座21内の弁
体22を該弁座21におけるテーパ部21b内周面に圧着す
る。これにより弁体22は閉状態となり，裏込め剤は該弁
座21内を通過せず，従って，分岐管３内に裏込め剤は流
入しない。The backfilling agent filled between the main pipe 2 and the spiral pipe tends to flow into the branch pipe 3 connected to the main pipe 2. However, at the end of the branch pipe 3, the liquid inflow prevention plug 1 of the present invention is provided.
Since the backfill agent is installed, the liquid inflow prevention plug 1
In the check valve 20, and the valve body 22 in the valve seat 21 is crimped to the inner peripheral surface of the tapered portion 21b of the valve seat 21. As a result, the valve body 22 is closed, and the backfilling agent does not pass through the valve seat 21, so that the backfilling agent does not flow into the branch pipe 3.
液体流入防止栓１は，裏込め剤にて分岐管３内へ向かっ
て押圧されるが，このとき，該液体流入防止栓１の係止
板10が，本管２内周面に係止されているため，該液体流
入防止栓１が分岐管３内へ押込まれるおそれがない。従
って，分岐管３の端部に裏込め剤が流入するおそれがな
い。The liquid inflow prevention plug 1 is pressed into the branch pipe 3 by the back-filling agent. At this time, the locking plate 10 of the liquid inflow prevention plug 1 is locked to the inner peripheral surface of the main pipe 2. Therefore, there is no possibility that the liquid inflow prevention plug 1 will be pushed into the branch pipe 3. Therefore, there is no possibility that the backfilling agent will flow into the end of the branch pipe 3.
このようにして，裏込め剤が本管２と螺旋管との間に充
填されると，該裏込め剤が硬化した後に，分岐管３と螺
旋管とが連通するように，該螺旋管，裏込め剤，および
液体流入防止栓１を挿通する貫通孔が開設される。該貫
通孔は，通常，螺旋管内から穿孔することにより形成さ
れるため，液体流入防止栓１には，マークが取付けられ
る。そして，螺旋管内から該マーカをセンサーにて検出
することにより，穿孔すべき位置が検出される。該マー
カとしては，センサから発振される音波等に共振して音
波等を発振する共振器等が使用される。In this way, when the backfill agent is filled between the main pipe 2 and the spiral pipe, the spiral pipe, A through hole for inserting the backfill agent and the liquid inflow prevention plug 1 is opened. Since the through hole is usually formed by punching from inside the spiral tube, a mark is attached to the liquid inflow prevention plug 1. Then, by detecting the marker with a sensor from the inside of the spiral tube, the position for drilling is detected. As the marker, a resonator or the like that resonates with a sound wave or the like oscillated from a sensor to oscillate the sound wave or the like is used.
螺旋管内から穿孔すべき位置が検出されると，その位置
が穿孔され，該螺旋管と分岐管３とを連通する貫通孔が
形成される。このとき，分岐管３内には裏込め剤が流入
していないために，穿孔のストロークは，螺旋管外周面
と係止板10との間の裏込め剤の厚さ，係止板10の厚さお
よび嵌合部材30の軸方向長さとなる。しかし，嵌合部材
30はゴム等にてチューブ状に形成されているため，その
一部に穴等が開設されれば破裂する。従って，実際の穿
孔のストロークは，螺旋管と係止板10との間の裏込め剤
の厚さおよび係止板10の厚さにほぼ等しくなる。このた
め，螺旋管と分岐管３とを連通する貫通孔は容易に形成
される。When a position to be drilled is detected from the inside of the spiral pipe, the position is drilled, and a through hole that connects the spiral pipe and the branch pipe 3 is formed. At this time, since the backfilling agent does not flow into the branch pipe 3, the stroke of the perforation depends on the thickness of the backfilling agent between the outer peripheral surface of the spiral pipe and the locking plate 10 and the locking plate 10. It is the thickness and the axial length of the fitting member 30. However, the mating member
Since 30 is formed of rubber or the like into a tube shape, it will burst if a hole or the like is opened in a part of it. Therefore, the actual stroke of perforation is approximately equal to the thickness of the backfill material between the spiral tube and the locking plate 10 and the thickness of the locking plate 10. Therefore, the through hole that connects the spiral pipe and the branch pipe 3 is easily formed.
第３図および第４図は本発明の分岐管の液体流入防止栓
の他の実施例を示すものである。本実施例の液体流入防
止栓１′は，環状の嵌合部材30′が断面円形状をしてい
る。また係止板10′は，長板状をしており，その長手方
向の各端部が本管２の内周面に係止される。さらに，本
実施例の逆止弁20′は，嵌合部材30′内に嵌合された円
筒状の筒体40内に配設され，係止板10′の透孔12に下端
が嵌合されている。該筒体40の内周面にはねじ溝が形成
されている。FIG. 3 and FIG. 4 show another embodiment of the liquid inflow preventing plug of the branch pipe of the present invention. In the liquid inflow prevention plug 1'of this embodiment, an annular fitting member 30 'has a circular cross section. The locking plate 10 ′ has a long plate shape, and each end portion in the longitudinal direction is locked to the inner peripheral surface of the main pipe 2. Further, the check valve 20 'of this embodiment is disposed in the cylindrical tubular body 40 fitted in the fitting member 30', and the lower end is fitted in the through hole 12 of the locking plate 10 '. Has been done. A thread groove is formed on the inner peripheral surface of the cylindrical body 40.
逆止弁20′は円筒状の弁座23を有する。該弁座23の外周
面には筒体40の外周面に形成されたねじ溝に螺合するね
じ溝が形成されている。該弁座23の直径位置上には軸方
向に延びる平板状の支持部23aが設けられており，該支
持部23aの下方に，弁体24が該支持部23aの軸心位置を挿
通する蝶ボルト23bにて取付けられている。該弁体24円
板状をしており，弁座23のテーパ状となった下端面にそ
の上面の外周縁が当接し得る。そして，該弁体24の支持
部23aに沿った下部が薄肉となっており，その薄肉部分
を中心に，弁体24の各半体が下方へ回動し得る。該液体
流入防止栓１′の動作は前記実施例の液体流入防止栓１
と同様である。The check valve 20 'has a cylindrical valve seat 23. On the outer peripheral surface of the valve seat 23, a thread groove that is screwed into the thread groove formed on the outer peripheral surface of the tubular body 40 is formed. A flat plate-shaped support portion 23a extending in the axial direction is provided on the diametrical position of the valve seat 23, and a butterfly, through which the valve element 24 passes through the axial center position of the support portion 23a, is provided below the support portion 23a. It is attached with bolts 23b. The valve body 24 has a disc shape, and the outer peripheral edge of the upper surface of the valve seat 23 can contact the tapered lower end surface of the valve seat 23. The lower portion of the valve body 24 along the support portion 23a is thin, and each half of the valve body 24 can rotate downward around the thin portion. The operation of the liquid inflow prevention plug 1'is the same as that of the liquid inflow prevention plug 1 of the above-mentioned embodiment.
Is the same as.
第５図は，本発明の液体流入防止栓のさらに他の実施例
を示すものである。本実施例の液体流入防止栓１″は，
矩形状の平板を本管２円周面に沿うように湾曲された係
止板10″を有する。該係止板10″の中央部には透孔13が
形成されており，該係止板10″の外周面には該透孔13の
内径より大きい内径を有する短円筒状の嵌合部材30″が
該透孔13と同心状に取付けられている。該嵌合部材30″
は，ゴム等の弾性体にて構成され，分岐管３の内径より
若干大きい外径を有している。該嵌合部材30″の外周面
にはひだが設けられており，該嵌合部材30″が分岐管３
内に圧入された際に，該嵌合部材30″外周面と分岐管３
内周面とが液密に圧着される。FIG. 5 shows still another embodiment of the liquid inflow prevention plug of the present invention. The liquid inflow prevention plug 1 ″ of this embodiment is
A rectangular flat plate has a locking plate 10 ″ curved along the circumferential surface of the main pipe 2. A through hole 13 is formed in the center of the locking plate 10 ″. On the outer peripheral surface of 10 ″, a short cylindrical fitting member 30 ″ having an inner diameter larger than the inner diameter of the through hole 13 is concentrically attached to the through hole 13. The mating member 30 "
Is made of an elastic material such as rubber and has an outer diameter slightly larger than the inner diameter of the branch pipe 3. The outer peripheral surface of the fitting member 30 ″ is provided with a fold, and the fitting member 30 ″ is provided with a fold.
When it is press-fitted in, the fitting member 30 ″ outer peripheral surface and the branch pipe 3
The inner peripheral surface is liquid-tightly pressure-bonded.
係止板10″の内周面には透孔13内を通流する液体の一方
の通流を規制する逆止弁20″が設けられている。該逆止
弁20″は，ゴム等の弾性体にて透孔13の内径より若干大
きい外径の円板状に構成されており，該逆止弁20″は，
係止板10″の内周面における透孔13の外縁部に，その外
周縁部の一部が取付けられている。A check valve 20 ″ is provided on the inner peripheral surface of the locking plate 10 ″ to regulate one flow of the liquid flowing through the through hole 13. The check valve 20 ″ is formed of an elastic material such as rubber into a disc shape having an outer diameter slightly larger than the inner diameter of the through hole 13, and the check valve 20 ″ is
A part of the outer peripheral edge portion is attached to the outer edge portion of the through hole 13 on the inner peripheral surface of the locking plate 10 ″.
該逆止弁20″は，分岐管３内を通流する下水等により下
方へ押下げられて開状態となり，該下水等を本管２内へ
通流させる。しかし，本管２と螺旋管との間に充填され
る裏込め剤は，逆止弁20″が係止板10″の透孔の外縁
に，該係止板10″の内面に沿って湾曲された弾性体の反
発作用により，圧着して閉じる状態となるため，分岐管
３内へ流入されない。The check valve 20 ″ is pushed downward by sewage or the like flowing in the branch pipe 3 to be in an open state, and allows the sewage or the like to flow into the main pipe 2. However, the main pipe 2 and the spiral pipe The backfilling agent filled between the check valve 20 ″ and the outer edge of the through hole of the locking plate 10 ″ is caused by the repulsive action of the elastic body curved along the inner surface of the locking plate 10 ″. Since it is crimped and closed, it does not flow into the branch pipe 3.
（発明の効果） 本発明の分岐管の液体流入防止栓は，このように，分岐
管内を通流する下水等は本管内に流入され，反対に分岐
管内には液体が流入するおそれがない。その結果，本管
を合成樹脂管にてライニングして更生するに際し，合成
樹脂管と本管との間に充填される裏込め剤が分岐管内に
流入することを確実に防止する。また，該液体流入防止
栓は，係止部材により分岐管内へ侵入することが防止さ
れるため，裏込め剤が充填された後に合成樹脂管内と分
岐管内とを連通するべく形成される貫通孔が長くなるお
それがない。従って，本発明の液体流入防止栓は，本管
を合成樹脂管にてライニングして更生する工法に好適に
用いられる。(Effects of the Invention) In the liquid inflow prevention plug of the branch pipe according to the present invention, the sewage flowing through the branch pipe thus flows into the main pipe, and on the contrary, the liquid does not flow into the branch pipe. As a result, when the main pipe is lined with the synthetic resin pipe and rehabilitated, the backfilling agent filled between the synthetic resin pipe and the main pipe is reliably prevented from flowing into the branch pipe. In addition, since the liquid inflow prevention plug is prevented from entering the branch pipe by the locking member, a through hole formed to connect the inside of the synthetic resin pipe and the inside of the branch pipe after being filled with the backfilling agent is formed. There is no danger of becoming longer. Therefore, the liquid inflow prevention plug of the present invention is suitably used for a construction method in which the main pipe is lined with a synthetic resin pipe to be rehabilitated.
第１図は本発明の分岐管の液体流入防止栓の一例を示す
断面図，第２図はその平面図，第３図は本発明の液体流
入防止栓の他の例を示す断面図，第４図はその平面図，
第５図はさらに本発明の液体流入防止栓の他の例を示す
断面図である。 1,1′,1″…液体流入防止栓,2…本管,3…分岐管,10…係
止板,11,12,13…透孔,20,20′,20″…逆止弁,21,23…弁
座,22,24…弁体,30,30′,30″…嵌合部材。1 is a sectional view showing an example of a liquid inflow preventing plug for a branch pipe of the present invention, FIG. 2 is a plan view thereof, and FIG. 3 is a sectional view showing another example of a liquid inflow preventing plug of the present invention. Figure 4 is its plan view,
FIG. 5 is a sectional view showing another example of the liquid inflow prevention plug of the present invention. 1,1 ', 1 "... Liquid inflow prevention plug, 2 ... Main pipe, 3 ... Branch pipe, 10 ... Locking plate, 11, 12, 13 ... Through hole, 20, 20', 20" ... Check valve, 21,23 ... Valve seat, 22,24 ... Valve element, 30,30 ', 30 ″ ... Mating member
Claims (1)
る端部に装着されて，該分岐管内への液体の流入を防止
する分岐管の液体流入防止栓であって， 該分岐管の端部内に嵌合されて該端部内周面に液密に圧
着されると共に，その内部を液体が通流し得る嵌合部材
と， 該嵌合部材が該分岐管の端部に嵌合された場合に，該嵌
合部材内を該分岐管内から本管内へのみ液体を通流させ
るべく該嵌合部材に設けられた逆止弁と， 該嵌合部材が分岐管の端部に嵌合された場合に，本管内
周面に係止して該嵌合部材が分岐管内へ侵入することを
防止すべく該嵌合部材に取付けられた係止部材と， を具備する分岐管の液体流入防止栓。1. A liquid inflow preventing plug of a branch pipe, which is attached to an end portion of a branch pipe branched from the main pipe and communicates with the main pipe, the liquid inflow preventing plug of the branch pipe being configured to prevent the liquid from flowing into the branch pipe. A fitting member fitted into the end of the pipe and crimped to the inner peripheral surface of the end in a liquid-tight manner, and a fitting member through which liquid can flow, and the fitting member fitted to the end of the branch pipe. And a check valve provided in the fitting member to allow the liquid to flow only from the inside of the branch pipe to the inside of the main pipe when the fitting member is fitted to the end of the branch pipe. And a locking member attached to the fitting member so as to prevent the fitting member from entering the branch pipe by being locked to the inner peripheral surface of the main pipe when combined. Inflow prevention plug.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63235857A JPH0751993B2 (en) | 1988-09-20 | 1988-09-20 | Liquid inflow prevention plug for branch pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63235857A JPH0751993B2 (en) | 1988-09-20 | 1988-09-20 | Liquid inflow prevention plug for branch pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0285595A JPH0285595A (en) | 1990-03-27 |
| JPH0751993B2 true JPH0751993B2 (en) | 1995-06-05 |
Family
ID=16992277
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63235857A Expired - Lifetime JPH0751993B2 (en) | 1988-09-20 | 1988-09-20 | Liquid inflow prevention plug for branch pipe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0751993B2 (en) |
-
1988
- 1988-09-20 JP JP63235857A patent/JPH0751993B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0285595A (en) | 1990-03-27 |
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