JP2009275494A - Cut-off apparatus for sewer - Google Patents

Cut-off apparatus for sewer Download PDF

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JP2009275494A
JP2009275494A JP2008130751A JP2008130751A JP2009275494A JP 2009275494 A JP2009275494 A JP 2009275494A JP 2008130751 A JP2008130751 A JP 2008130751A JP 2008130751 A JP2008130751 A JP 2008130751A JP 2009275494 A JP2009275494 A JP 2009275494A
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butterfly valve
sewer pipe
sewer
fixed
valve body
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Akio Nakayama
昭夫 中山
Hiroshi Shimada
弘 島田
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NAKAYAMA MAINTENANCE CO Ltd
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NAKAYAMA MAINTENANCE CO Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a cut-off apparatus for a sewer using a butterfly valve so as not to be carried away by a cut-off pressure, allowing the butterfly valve to be restropectively fitted to the sewer and simplifying the after-fitting work. <P>SOLUTION: The cut-off apparatus for the sewer comprises the butterfly valve 3 opening/closing a circular sewer pipe; a support device 4 supporting the butterfly valve in a rockable manner at an intermediate height position of the sewer pipe; and an opening/closing device 5 for opening the butterfly valve. The opening/closing device is installed in a manhole or the sewer pipe. The support device comprises two sets of journal units 42 each comprising a rotating shaft 40 and a bearing 41, and anchor bolts 43 fixing the journal units. An embedded part of each anchor bolt is bonded and solidified into an insertion hole of the sewer pipe, and an opposite side connection part is projected into the sewer pipe. The butterfly valve comprises a valve body 30 formed of a disk, and a sealing material 31 provided along the outer peripheral edge part of the valve body. The disk of the valve body is formed of a plurality of divided plates 33, and one of the rotating shaft and bearing is fixed to the connection part of the anchor bolt, while the other is fixed to the valve body. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、バタフライバルブを用いて下水道を止水する装置に関する。   The present invention relates to an apparatus for stopping a sewer using a butterfly valve.

下水道の管内を点検、清掃、及び補修する際には、下水道の止水作業を行うことがある。下水道の止水装置としては、バタフライ弁を用い、高い水圧が加わっても止水できるようにしたものが存在する(特許文献1)。バタフライ弁は軸支されているので、高い止水圧が加わっても流されることはない。ところが、この止水装置では、バタフライ弁の開閉装置を下水道管の外側に配備してある。従って、この開閉装置は、下水道を構築する際に、予め設置しておくものであって、既存の下水道に後付け可能なものではない。   When checking, cleaning, and repairing the inside of sewer pipes, the sewer may be stopped. As a water stop device for a sewer, there is a device that uses a butterfly valve so that water can be stopped even when a high water pressure is applied (Patent Document 1). Since the butterfly valve is pivotally supported, it will not flow even if a high water stop pressure is applied. However, in this water stop device, a butterfly valve opening and closing device is provided outside the sewer pipe. Therefore, this switchgear is installed in advance when constructing a sewer, and cannot be retrofitted to an existing sewer.

一方、後付可能な下水道の止水装置としては、チューブを膨らませて下水道を閉鎖するものが一般的である(特許文献2)。この種の止水装置は、下水道に強くチューブを押し当て、その摩擦によってチューブの設置位置を保持するものであり、止水による高い水圧が加わった場合にチューブが流されないように、止水箇所の一部にバイパスを設けておくといった、対策を施してある。ちなみに、バイパスがない場合には、チューブを上流側のマンホール設置箇所からワイヤー等で引っ張ったり、流れ止めの柵をチューブから少し離れた下流に設置する等の、対策を施すものである。マンホールの設置間隔が400〜500mもあるような場合には、止水箇所からのワイヤーの延長距離も同等になる上に、下水道管の内径が1.5m程度であり人が移動するには狭すぎることもあって、施工が困難であり、現実的ではない。かといって柵の設置も大変であるし、設置した柵とチューブの間の空間で作業者が点検等している場合にチューブが流されると、作業者が大変危険な目にあうことになる。   On the other hand, as a sewer water stop device that can be retrofitted, it is common to inflate a tube and close the sewer (Patent Document 2). This type of water stop device strongly presses the tube against the sewer and holds the tube installation position by friction, so that when the high water pressure due to water stop is applied, the tube will not flow. Measures are taken such as providing a bypass in part of By the way, when there is no bypass, measures are taken such as pulling the tube from the upstream manhole installation place with a wire or the like, or installing a flow prevention fence slightly downstream from the tube. When the manhole installation interval is 400 to 500 m, the extension distance of the wire from the water stop point is the same, and the inner diameter of the sewer pipe is about 1.5 m, which is narrow for people to move. It may be too much, and construction is difficult and is not realistic. However, the installation of the fence is also difficult, and if the worker is inspecting etc. in the space between the installed fence and the tube, the worker will encounter very dangerous eyes .

特開2003−3528号公報Japanese Patent Laid-Open No. 2003-3528 特開2007−285419号公報JP 2007-285419 A

上記実情を考慮して創作されたものが本発明であり、その解決課題は、止水圧で流されないようにバタフライ弁を用い、しかもバタフライ弁を既設の下水道に後付可能であり、その後付作業を簡単なものとすることである。   The present invention was created in consideration of the above circumstances, and its solution is to use a butterfly valve so that it will not be washed away by the water stop pressure, and the butterfly valve can be retrofitted to an existing sewer, and the work after that To make it simple.

本発明は、コンクリート製の断面円形の下水道管を開閉するバタフライ弁と、バタフライ弁を下水道管の高さ中間部の左右で揺動可能に支える支持装置と、バタフライ弁を開閉する開閉装置を備えることを前提とする。   The present invention includes a butterfly valve that opens and closes a sewer pipe having a circular cross section made of concrete, a support device that supports the butterfly valve so as to be swingable on the left and right of the middle portion of the sewer pipe, and an opening and closing device that opens and closes the butterfly valve. Assuming that.

開閉装置は、バタフライ弁の設置箇所の下流側であって、下水道管に通じるマンホール又は下水道管に設置するもので、支持装置は、バタフライ弁の回転中心となる回転軸と軸受からなる軸支ユニットを二組と、下水道管の高さ中間部の左右に軸支ユニットを着脱可能に固定するアンカーボルトとを備え、アンカーボルトは、その植え込み部を下水道管にあけた挿入穴に挿入し且つ接着剤で固化し、その反対側の連結部を下水道管の内部に突出するもので、バタフライ弁は、下水道管よりも小径の弁本体と、弁本体の外周縁部に沿って外側に張り出して固定してあるシール材とを備え、弁本体は、複数の分割板を分解可能に組立てることによって円板を形成するものであり、各組の軸支ユニットにおける回転軸と軸受の一方をアンカーボルトの連結部に固定し、他方を弁本体に固定してあるものである。   The opening / closing device is installed downstream of the installation location of the butterfly valve, in a manhole leading to the sewer pipe, or in the sewer pipe, and the support device is a pivotal support unit composed of a rotating shaft and a bearing serving as the rotation center of the butterfly valve And two anchor bolts on the left and right sides of the middle part of the sewer pipe. The anchor bolts are detachably fixed. The anchor bolt is inserted into an insertion hole formed in the sewer pipe and bonded. The butterfly valve has a smaller diameter than the sewer pipe, and the butterfly valve is fixed to project outward along the outer peripheral edge of the valve body. The valve body forms a disc by assembling a plurality of divided plates so that they can be disassembled, and one of the rotating shaft and the bearing in each set of pivot support units is anchor bolts. And fixed to the connecting portion, in which is fixed the other to the valve body.

シール材は弁本体の外周縁部に沿って外側に張り出して固定してあるので、バタフライ弁を閉じると、シール材が下水道管の内面に接触して、止水を確保できる。また、バタフライ弁の円滑な開閉運動(揺動運動)を確保するには、止水時に軸支ユニットが汚水にできるだけ触れないようにすることが望ましい。即ち、バタフライ弁は、軸支ユニットを収容する保護筒を弁本体の左右に備え、保護筒の外側端部に沿って別のシール材を外側に張り出して固定してあるものである。   Since the sealing material protrudes outward along the outer peripheral edge of the valve body and is fixed, when the butterfly valve is closed, the sealing material comes into contact with the inner surface of the sewer pipe, and water stoppage can be secured. Further, in order to ensure a smooth opening / closing motion (swinging motion) of the butterfly valve, it is desirable that the shaft support unit should not touch the dirty water as much as possible when the water stops. That is, the butterfly valve is provided with protective cylinders for accommodating the pivot support units on the left and right sides of the valve body, and another sealing material is projected outwardly and fixed along the outer end of the protective cylinder.

開閉装置は、下水道管の中に固定してもよいが、汚水に触れないようにするには、次のようにすることが望ましい。即ち、開閉装置は、マンホールの下部に着脱可能に固定するものである。   The switchgear may be fixed in the sewer pipe, but it is desirable to do the following in order not to touch the sewage. That is, the opening / closing device is detachably fixed to the lower part of the manhole.

開閉装置は、バタフライ弁を揺動するものであればよく、具体的には、回転運動を揺動運動に変えるもの(例えばモータの回転を伝達機構を介してバタフライ弁に伝えるもの)であってもよいが、バタフライ弁との連結作業を含めた設置作業全般を容易にするには次のようにすることが望ましい。即ち、開閉装置は、マンホールに着脱可能に固定する載置台と、載置台に載せるシリンダ装置とを備え、シリンダ装置は、ピストンロッドの先部を弁本体の揺動端側に連結し、載置台に対してシリンダを揺動可能に連結してあるものである。   The opening / closing device only needs to swing the butterfly valve. Specifically, the opening / closing device changes the rotational motion to the swing motion (for example, transmits the rotation of the motor to the butterfly valve via a transmission mechanism). However, in order to facilitate the entire installation operation including the connection operation with the butterfly valve, it is desirable to do the following. That is, the opening / closing device includes a mounting table that is detachably fixed to the manhole, and a cylinder device that is mounted on the mounting table. The cylinder device connects the tip of the piston rod to the swing end side of the valve body, With respect to the cylinder, the cylinder is swingably connected.

本発明は、下水道管に挿入穴をあけて、アンカーボルトを挿入孔に接着剤で固定する仕方を用い、アンカーボルトを利用して支持装置の軸支ユニット、およびバタフライ弁を後付けするものである。また、開閉装置も、バタフライ弁の下流側に設置するものである。従って、本発明は、既設の下水道に後付け可能である。さらに、アンカーボルトの接着、及びアンカーボルトの連結部を利用した組立て、並びにバタフライ弁の下流側への開閉装置の設置によって施工できるので、従来のように上流側のマンホールからワイヤーで引っ張ったり、柵を設けずに済み、後付け作業が容易である。その上、複数の分割板を分解可能に組み立てることによってバタフライ弁を円板にするものなので、マンホールからの出し入れも容易に行え、使用後に分解して別の場所に持ち運ぶことも容易に行える。また、下水道管内は、汚水の水位が通常、高さ(直径)の1/3程度であり、アンカーボルトの固定箇所を高さ中間部としてあるので、支持装置およびバタフライ弁の取り付け作業は汚水に触れることなく行え、非常に作業性に優れている。   The present invention uses a method of making an insertion hole in a sewer pipe and fixing the anchor bolt to the insertion hole with an adhesive, and retrofitting the support unit and the butterfly valve using the anchor bolt. . The opening / closing device is also installed on the downstream side of the butterfly valve. Therefore, the present invention can be retrofitted to an existing sewer. In addition, it can be constructed by bonding anchor bolts, assembling using anchor bolt connecting parts, and installing an opening / closing device downstream of the butterfly valve. It is not necessary to provide a post-installation work, and the retrofit work is easy. In addition, since the butterfly valve is made into a disk by assembling a plurality of divided plates so that they can be disassembled, they can be easily taken in and out of the manhole, and can be easily disassembled and carried to another place after use. Also, in the sewer pipe, the level of sewage is usually about 1/3 of the height (diameter), and the anchor bolt is fixed at the middle part of the height. It can be done without touching and is extremely easy to work with.

請求項2の発明は、保護筒およびその外側端部に固定した別のシール材によって、軸支ユニットが汚水に触れ難くなるので、バタフライ弁の揺動にとって重要な回転中心に防水対策を施したことになり、バタフライ弁の円滑な揺動を確保できる。従って、止水によって軸支ユニットよりも水位が上がっても、バタフライ弁を迅速に開いて汚水を下流に流すことができる。これにより、汚水が地上に溢れ出ることも防げる。   In the invention of claim 2, since the shaft support unit is difficult to touch the sewage due to the protective cylinder and another sealing material fixed to the outer end portion thereof, waterproof measures are taken at the rotation center important for the swing of the butterfly valve. As a result, smooth swinging of the butterfly valve can be ensured. Therefore, even if the water level rises higher than that of the shaft support unit due to water stoppage, the butterfly valve can be opened quickly and the sewage can flow downstream. This prevents sewage from overflowing to the ground.

請求項3の発明は、マンホールの下部が通常、乾いていることに着目し、開閉装置をマンホールの下部に着脱可能に固定するものなので、後付け及び撤去作業も容易に行え、しかも、開閉装置が故障することもない有用なものである。   The invention of claim 3 pays attention to the fact that the lower part of the manhole is normally dry, and since the switchgear is detachably fixed to the lower part of the manhole, the retrofitting and removal work can be easily performed, and the switchgear is It is a useful thing that does not break down.

請求項4の発明は、載置台をマンホールに固定して、シリンダ装置のピストンロッドの先部を弁本体の揺動端側に連結するだけで設置できるので、後付け作業を容易に行える。   The invention according to claim 4 can be installed simply by fixing the mounting table to the manhole and connecting the tip of the piston rod of the cylinder device to the oscillating end side of the valve body.

下水道の止水装置は、図1、図2に示すように、断面円形のコンクリート製の下水道管1を一時的に止水するために、地上に通じるマンホール2の下端付近に設置するものである。そして、下水道の止水装置は、下水道管1を開閉可能なバタフライ弁3を用いるもので、バタフライ弁3を支える支持装置4を下水道管1の高さ中間部に取り付け、支持装置4によってバタフライ弁3を揺動可能に支持し、バタフライ弁3を開閉する開閉装置5をマンホール2に着脱可能に固定したものである。以下、バタフライ弁3、支持装置4、開閉装置5の順で詳述する。   As shown in FIGS. 1 and 2, the sewer water stop device is installed near the lower end of a manhole 2 leading to the ground in order to temporarily stop the sewer pipe 1 made of concrete having a circular cross section. . And the water stop apparatus of a sewer uses the butterfly valve 3 which can open and close the sewer pipe 1, The support apparatus 4 which supports the butterfly valve 3 is attached to the height intermediate part of the sewer pipe 1, and a butterfly valve is supported by the support apparatus 4 3 is slidably supported, and an opening / closing device 5 for opening and closing the butterfly valve 3 is detachably fixed to the manhole 2. Hereinafter, the butterfly valve 3, the support device 4, and the opening / closing device 5 will be described in detail.

バタフライ弁3は、下水道管1を開閉するものである。バタフライ弁3の構造は、円板の弁本体30を下水道管1よりも小径に形成し、弁本体30の外周に沿ってシール材31を外側に張り出して固定したものである。   The butterfly valve 3 opens and closes the sewer pipe 1. The structure of the butterfly valve 3 is such that a disc-shaped valve body 30 is formed to have a smaller diameter than the sewer pipe 1, and a sealing material 31 is projected outwardly and fixed along the outer periphery of the valve body 30.

弁本体30は、高さ中間部の左右に沿って延長する保護筒32を備える円板で、複数の分割板33を分解可能に組み立てたものである。また、弁本体30は、左右に三つに分解可能なもので、短筒32aが付いた三枚の分割板33を、左右に突き合わせて連結したものである。各分割板33は、高さ中間部に短筒32aが付いており、また、表裏面にリブRも補強および連結の目的で付いている。そして、三つの分割板33は、短筒32a同士をボルト・ナットでフランジ接合すると共に、左右縁部に設けたリブR同士をボルト・ナットで連結して、短筒32aが連結して保護筒32になると共に円板の弁本体30に組み立てられる。   The valve main body 30 is a disc including a protection cylinder 32 extending along the left and right of the height intermediate portion, and is constructed by assembling a plurality of divided plates 33 so as to be disassembled. The valve main body 30 can be disassembled into three parts on the left and right sides, and is formed by connecting three divided plates 33 with short cylinders 32a so as to abut on the left and right. Each divided plate 33 has a short cylinder 32a at the height intermediate portion, and ribs R are also attached to the front and back surfaces for the purpose of reinforcement and connection. The three divided plates 33 are flanged between the short cylinders 32a with bolts and nuts, and the ribs R provided on the left and right edge parts are connected with bolts and nuts, and the short cylinders 32a are connected to form a protective cylinder. 32 and assembled into a disc valve body 30.

シール材31は、図5に示すように弁本体30の外周と下水道管1との隙間を塞ぐものである。シール材31の構造は、弁本体30(各分割板33)の表面外周縁部にシール材本体であるP型ゴム34を沿わせ、P型ゴム34の接続片34aを弁本体30の外周縁部と止め板35との間に挟んでボルト・ナットで固定し、P型ゴム34の丸い止水筒34bを下水道管1に接触して止水するものである。   As shown in FIG. 5, the sealing material 31 closes the gap between the outer periphery of the valve body 30 and the sewer pipe 1. The structure of the sealing material 31 is such that a P-type rubber 34 which is a sealing material body is provided along the outer peripheral edge of the surface of the valve body 30 (each divided plate 33), and the connection piece 34a of the P-type rubber 34 is connected to the outer peripheral edge of the valve body 30. It is fixed with bolts and nuts between the part and the stop plate 35, and the round water stop tube 34b of the P-type rubber 34 is brought into contact with the sewer pipe 1 to stop water.

また、別のシール材36は図3に示すように、弁本体30の表裏面において、保護筒32の左右端部と下水道管1との隙間を塞ぐものでもある。シール材36の構造は、保護筒32の半周部分である表面側にシール材本体である帯型ゴム37をそれぞれ半円状に沿わせて、帯型ゴム37の幅中間部を弁本体30と別の止め板38との間に挟んでボルト・ナットで固定し、帯型ゴム37の先部を、後述する支持装置4の接合板48に接触して止水するものである。   Further, as shown in FIG. 3, the other sealing material 36 is also used to close the gap between the left and right end portions of the protective cylinder 32 and the sewer pipe 1 on the front and back surfaces of the valve body 30. The structure of the sealing material 36 is such that a belt-shaped rubber 37 that is a sealing material body is arranged in a semicircular shape on the surface side that is a semicircular portion of the protective cylinder 32, and a width intermediate portion of the belt-shaped rubber 37 is connected to the valve body 30. It is sandwiched between another stop plate 38 and fixed with bolts and nuts, and the tip of the belt-shaped rubber 37 is brought into contact with a joining plate 48 of the support device 4 described later to stop water.

次に述べる支持装置4は、図2〜図4に示すように、バタフライ弁3を揺動可能に支えるもので、下水道管1の高さ中間部でバタフライ弁3の左右を支持するものである。支持装置4の構造は、バタフライ弁3の回転中心となる回転軸40と軸受41からなる軸支ユニット42を二組有し、下水道管1の高さ中間部の左右に対称的に軸支ユニット42をアンカーボルト43で着脱可能に固定し、軸支ユニット42の大部分を保護筒32の内部に収容してあるものである。   As shown in FIGS. 2 to 4, the support device 4 to be described next supports the butterfly valve 3 in a swingable manner, and supports the left and right sides of the butterfly valve 3 at the height intermediate portion of the sewer pipe 1. . The structure of the support device 4 includes two sets of a shaft support unit 42 including a rotation shaft 40 that serves as a rotation center of the butterfly valve 3 and a bearing 41, and a shaft support unit that is symmetrical to the left and right of the intermediate height portion of the sewer pipe 1. 42 is detachably fixed by an anchor bolt 43, and most of the shaft support unit 42 is accommodated in the protective cylinder 32.

左右の回転軸40は、バタフライ弁3の高さ中間部に左右対称に固定してあると共に、その大部分を保護筒32の内側にそれぞれ収容し、その外側先部を保護筒32から僅かに突出してある。   The left and right rotating shafts 40 are fixed symmetrically to the height intermediate portion of the butterfly valve 3, and most of the rotating shafts 40 are accommodated inside the protective cylinder 32, and the outer front ends thereof are slightly located from the protective cylinder 32. It protrudes.

回転軸40を保護筒32の内側に固定する構造は、保護筒32の内部には、内周に沿う固定リング44を軸線方向に間隔をあけて複数固定し、全ての固定リング44の内孔44aに回転軸40を挿通し、芯出しリング45を回転軸40の外周部に固定し、芯出しリング45を外側の固定リング44に溶接して回転軸40の中心を位置決め固定し、回転軸40の外周部の凹溝46に係止プレート47の幅方向中間部を収容すると共に、係止プレート47の幅方向両側部を内側の固定リング44にボルト・ナットで連結するものである。このように回転軸40が保護筒32の中に固定されているので、支持装置4の一部がバタフライ弁3に組み込まれたものとも言える。   In the structure in which the rotating shaft 40 is fixed inside the protective cylinder 32, a plurality of fixing rings 44 along the inner periphery are fixed inside the protective cylinder 32 at intervals in the axial direction, and the inner holes of all the fixing rings 44 are fixed. The rotating shaft 40 is inserted into 44a, the centering ring 45 is fixed to the outer periphery of the rotating shaft 40, the centering ring 45 is welded to the outer fixing ring 44, and the center of the rotating shaft 40 is positioned and fixed. An intermediate portion in the width direction of the locking plate 47 is accommodated in the concave groove 46 on the outer peripheral portion 40, and both side portions in the width direction of the locking plate 47 are connected to the inner fixing ring 44 by bolts and nuts. Since the rotating shaft 40 is fixed in the protective cylinder 32 in this way, it can be said that a part of the support device 4 is incorporated in the butterfly valve 3.

軸受41は、ころがり軸受からなる軸受本体41aの外側フランジに接合板48をボルト・ナットで固定し、接合板48をアンカーボルト43にナットで固定したものである。軸受本体41aは、軸受本体41a(内側スリーブ)の端面に芯出しリング45が隣接して、バタフライ弁3の左右方向を位置決めする。   The bearing 41 is obtained by fixing a joining plate 48 with bolts and nuts to the outer flange of a bearing body 41 a formed of a rolling bearing, and fixing the joining plate 48 to the anchor bolts 43 with nuts. In the bearing body 41a, the centering ring 45 is adjacent to the end surface of the bearing body 41a (inner sleeve) to position the butterfly valve 3 in the left-right direction.

また、接合板48は、図7、図8に示すように、下水道管1の内周面に押し当てて固定されるもので、中央部には軸受本体41aを通す貫通穴48aをあけ、周囲の四隅にはアンカーボルト43を通す抜穴48bをあけてある。接合板48は、その縁部の片面を面取りすることによって、縁部が下水道管1の内周面にならって広い面積であたり、安定するようになる。   Further, as shown in FIGS. 7 and 8, the joining plate 48 is fixed by being pressed against the inner peripheral surface of the sewer pipe 1, and a through hole 48a through which the bearing body 41a is passed is formed in the center portion, Are formed with holes 48b through which the anchor bolts 43 are passed. By chamfering one side of the edge portion of the joining plate 48, the edge portion is stabilized in a wide area following the inner peripheral surface of the sewer pipe 1.

アンカーボルト43は、その植え込み部43aを下水道管1にあけた挿入穴49に挿入し且つ接着剤49aで固化し、その反対側の連結部43bを下水道管1の内部に突出し、連結部43bに接合板48の抜穴48bを通してナットで固定するものである。挿入穴49をあける際や接合板48を取り付ける際には、回転軸40が下水道管1の高さ中間部にくるように、注意する。   The anchor bolt 43 is inserted into the insertion hole 49 formed in the sewer pipe 1 in the anchor bolt 43 and solidified by the adhesive 49a, and the connecting part 43b on the opposite side protrudes into the sewer pipe 1 to be connected to the connecting part 43b. It is fixed with a nut through a hole 48b of the joining plate 48. When opening the insertion hole 49 or attaching the joining plate 48, care should be taken so that the rotary shaft 40 comes to the height intermediate portion of the sewer pipe 1.

最後に述べる開閉装置5は、図1、図6に示すように、マンホール2の下部に載置台50を介してシリンダ装置51を着脱可能に固定し、シリンダ装置51のシリンダ52を載置台50に揺動可能に支持し、シリンダ装置51のピストンロッド53の先部をバタフライ弁3の揺動端側に連結したものである。   As shown in FIGS. 1 and 6, the opening / closing device 5 to be described lastly has a cylinder device 51 detachably fixed to a lower portion of a manhole 2 via a mounting table 50, and a cylinder 52 of the cylinder device 51 is attached to the mounting table 50. The tip of the piston rod 53 of the cylinder device 51 is connected to the swing end side of the butterfly valve 3.

載置台50は、縦材と横材をL字に組んだベース50aを、マンホール2の下部に左右に間隔をあけて配備し、ベース50aの縦材をマンホール2にボルト・ナットで固定してある。縦材の固定は、上述したアンカーボルト43と同様の仕方を利用して固定する。また、シリンダ52を揺動可能に支持する構造は、ベース50aの横材の先部に受台50bを固定し、受台50bにシリンダ52をピンP1で連結してある。ピンP1は、シリンダ52の外周に固定した枠体54の左右からそれぞれ突出し、各受台50bのピン孔50cに通してある。   The mounting table 50 is provided with a base 50a in which vertical and horizontal members are assembled in an L-shape with a space left and right at the bottom of the manhole 2, and the vertical member of the base 50a is fixed to the manhole 2 with bolts and nuts. is there. The vertical member is fixed using the same method as the anchor bolt 43 described above. Further, in the structure for supporting the cylinder 52 so as to be swingable, the receiving base 50b is fixed to the front portion of the cross member of the base 50a, and the cylinder 52 is connected to the receiving base 50b with a pin P1. The pins P1 protrude from the left and right sides of the frame body 54 fixed to the outer periphery of the cylinder 52, and pass through the pin holes 50c of the receiving bases 50b.

シリンダ装置51は、シリンダ52の長手方向に沿ってピストンロッド53を往復動させ、ピストンロッド53の先部にバタフライ弁3を別のピンP2で連結したものである。別のピンP2は、バタフライ弁3の弁本体30に固定したリブRに連結してある。シリンダ装置51にホースを介して流体を供給する流体供給源(油圧ユニット)は、図示しないが、マンホール2の途中に通常、踊り場が組んであるので、踊り場の上に設置する。また、ピストンロッド53は、ターンバックル53aをその長手方向途中に備えるものであって、ターンバックル53aを回すと、ターンバックル53aに嵌まり込んでいる両側のネジが回って全長が伸縮し、バタフライ弁3との連結作業を行い易くなる。   The cylinder device 51 is such that the piston rod 53 is reciprocated along the longitudinal direction of the cylinder 52, and the butterfly valve 3 is connected to the tip of the piston rod 53 by another pin P2. Another pin P <b> 2 is connected to a rib R fixed to the valve body 30 of the butterfly valve 3. Although not shown, a fluid supply source (hydraulic unit) that supplies fluid to the cylinder device 51 via a hose is usually installed in the middle of the manhole 2 and is installed on the landing. Further, the piston rod 53 is provided with a turnbuckle 53a in the middle of its longitudinal direction. When the turnbuckle 53a is turned, the screws on both sides fitted in the turnbuckle 53a are turned to expand and contract the entire length. It becomes easy to perform the connection operation with the valve 3.

上述した下水道の止水装置は、以下の手順で組み立てる。まず、支持装置4を取り付ける。コンクリート製の下水道管1の高さ中間部分にドリルで挿入穴49を左右対称的にあけ、接着剤49aの入った図示しない容器を挿入穴49に入れ、アンカーボルト43の植え込み部43aを挿入穴49に押し込んで容器を破り、容器から接着剤49aを溢れ出させて固化させることによってアンカーボルト43を固定する。   The sewer water stop device described above is assembled in the following procedure. First, the support device 4 is attached. An insertion hole 49 is drilled symmetrically in the middle of the height of the concrete sewer pipe 1 with a drill, a container (not shown) containing an adhesive 49a is inserted into the insertion hole 49, and the planting portion 43a of the anchor bolt 43 is inserted into the insertion hole. The anchor bolt 43 is fixed by pushing into 49 to break the container and causing the adhesive 49a to overflow from the container and solidify.

次に、アンカーボルト43の突出する連結部43bに接合板48の四隅の抜穴48bを通し、ナットで接合板48を下水道管1に押付けて固定する。接合板48の中央部の貫通穴48aに軸受本体41aの外側部分を通し、軸受本体41aの外側フランジを接合板48に連結する。   Next, through holes 48b at the four corners of the joining plate 48 are passed through the connecting portion 43b from which the anchor bolt 43 protrudes, and the joining plate 48 is pressed against the sewer pipe 1 with a nut and fixed. The outer portion of the bearing body 41 a is passed through the through hole 48 a in the center of the joining plate 48, and the outer flange of the bearing body 41 a is connected to the joining plate 48.

続いて、左右の分割板33を各接合板48の近くまで運び、各分割板33の回転軸40を軸受41の中にそれぞれ通す。引き続き、中央の分割板33を運んで左右の分割板33の間に入れ、短筒32a同士をフランジ接合すると共にリブR同士を接合する。シール材31、36は、分割板33に予め取り付けてあっても良いし、フランジ接合等の後から取り付けても良い。以上により、バタフライ弁3が支持装置4に固定される。   Subsequently, the left and right divided plates 33 are carried close to the joint plates 48, and the rotating shafts 40 of the divided plates 33 are respectively passed through the bearings 41. Subsequently, the central dividing plate 33 is carried and placed between the left and right dividing plates 33, and the short cylinders 32a are flange-joined and the ribs R are joined. The sealing materials 31 and 36 may be attached to the dividing plate 33 in advance, or may be attached after flange joining or the like. As described above, the butterfly valve 3 is fixed to the support device 4.

一方、開閉装置5については、載置台50とシリンダ装置51が予め連結したものを用い、マンホール2の下部にベース50aをボルト・ナットで固定する。ボルトは、前述のアンカーボルト43と同様の手法でマンホール2に固定する。そして、ピストンロッド53の先部をバタフライ弁3のリブRにピンP2で連結する。このとき、ピストンロッド53は、最も収縮した状態となるように、ターンバックル53aを回して全長を調整する。   On the other hand, as the opening / closing device 5, one in which the mounting table 50 and the cylinder device 51 are connected in advance is used, and the base 50 a is fixed to the lower portion of the manhole 2 with bolts and nuts. The bolt is fixed to the manhole 2 by the same method as the anchor bolt 43 described above. Then, the tip of the piston rod 53 is connected to the rib R of the butterfly valve 3 with a pin P2. At this time, the piston rod 53 adjusts the entire length by turning the turnbuckle 53a so as to be in the most contracted state.

このようにして組み立てた下水道の止水装置は、流体供給源から流体を送り、設定圧でバタフライ弁3を閉じて下水道管1を止水する。そして、止水の間に下流側の補修等をする。補修作業終了後には、所定の角度にバタフライ弁3を開いて汚水を流す。汚水の水位が低くなったら、上述の手順とは逆の要領でナットを緩めて、バタフライ弁3、支持装置4、開閉装置5を取り外して、地上に運ぶ。なお、支持装置4のアンカーボルト43や、開閉装置5を止めるボルト等は、その連結部43bを切断しても良いし、後日、使用することを考慮してそのまま残しておいても良い。   The sewer water stop device assembled in this way sends fluid from a fluid supply source, closes the butterfly valve 3 at a set pressure, and stops the sewer pipe 1. Then, downstream repair or the like is performed during the water stoppage. After completion of the repair work, the butterfly valve 3 is opened at a predetermined angle to allow sewage to flow. When the water level of the sewage becomes low, the nut is loosened in a manner reverse to the above-described procedure, the butterfly valve 3, the support device 4, and the opening / closing device 5 are removed and carried to the ground. It should be noted that the anchor bolt 43 of the support device 4, the bolt that stops the opening / closing device 5, or the like may be cut off at the connecting portion 43 b or may be left as it is in consideration of later use.

下水道の止水装置は上記実施形態に限定されない。例えば、回転軸40をアンカーボルト43側に固定し、軸受41を保護筒32内に固定するものであっても良い。また、保護筒32がない構造であっても良い。   The sewer water stop device is not limited to the above embodiment. For example, the rotary shaft 40 may be fixed to the anchor bolt 43 side and the bearing 41 may be fixed in the protective cylinder 32. Moreover, the structure without the protection cylinder 32 may be sufficient.

下水道の止水装置を示す正面図である。It is a front view which shows the water stop apparatus of a sewer. 図1の側面図である。It is a side view of FIG. 図2の一部拡大図である。FIG. 3 is a partially enlarged view of FIG. 2. 図3のA−A線断面図である。FIG. 4 is a sectional view taken along line AA in FIG. 3. 図1の一部拡大図である。FIG. 2 is a partially enlarged view of FIG. 1. シリンダ装置の支持の仕方を示す説明図である。It is explanatory drawing which shows the method of supporting a cylinder apparatus. アンカーボルトと接合板の連結関係を示す説明図である。It is explanatory drawing which shows the connection relation of an anchor bolt and a joining board. 接合板を連結した状態を示す説明図である。It is explanatory drawing which shows the state which connected the joining board.

符号の説明Explanation of symbols

1下水道管、2マンホール、3バタフライ弁、4支持装置、5開閉装置、
30弁本体、31シール材、32保護筒、32a短筒、33分割板、34P型ゴム、
34a接続片、34b止水筒、35止め板、36シール材、37帯型ゴム、38止め板、
40回転軸、41軸受、41a軸受本体、42軸支ユニット、43アンカーボルト、
43a植え込み部、43b連結部、44固定リング、44a内孔、45芯出しリング、
46凹溝、47係止プレート、48接合板、48a貫通穴、48b抜穴、49挿入穴、
49a接着剤、P1ピン、P2ピン、
50載置台、50aベース、50b受台、50cピン孔、51シリンダ装置、
52シリンダ、53ピストンロッド、53aターンバックル、54枠体
1 sewer pipe, 2 manhole, 3 butterfly valve, 4 support device, 5 opening and closing device,
30 valve body, 31 sealing material, 32 protective cylinder, 32a short cylinder, 33 divided plate, 34P type rubber,
34a connection piece, 34b water stopper, 35 stopper plate, 36 sealing material, 37 band type rubber, 38 stopper plate,
40 rotating shaft, 41 bearing, 41a bearing body, 42 shaft support unit, 43 anchor bolt,
43a implantation part, 43b connection part, 44 fixing ring, 44a inner hole, 45 centering ring,
46 concave groove, 47 locking plate, 48 joint plate, 48a through hole, 48b through hole, 49 insertion hole,
49a adhesive, P1 pin, P2 pin,
50 mounting table, 50a base, 50b receiving table, 50c pin hole, 51 cylinder device,
52 cylinders, 53 piston rods, 53a turn buckles, 54 frames

Claims (4)

コンクリート製の断面円形の下水道管(1)を開閉するバタフライ弁(3)と、バタフライ弁(3)を下水道管(1)の高さ中間部の左右で揺動可能に支える支持装置(4)と、バタフライ弁(3)を開閉する開閉装置(5)を備え、
開閉装置(5)は、バタフライ弁(3)の設置箇所の下流側であって、下水道管(1)に通じるマンホール(2)又は下水道管(1)に設置するもので、
支持装置(4)は、バタフライ弁(3)の回転中心となる回転軸(40)と軸受(41)からなる軸支ユニット(42)を二組と、下水道管(1)の高さ中間部の左右に軸支ユニット(42)を着脱可能に固定するアンカーボルト(43)とを備え、
アンカーボルト(43)は、その植え込み部(43a)を下水道管(1)にあけた挿入穴(49)に挿入し且つ接着剤(49a)で固化し、その反対側の連結部(43b)を下水道管(1)の内部に突出するもので、
バタフライ弁(3)は、下水道管(1)よりも小径の弁本体(30)と、弁本体(30)の外周縁部に沿って外側に張り出して固定してあるシール材(31)とを備え、
弁本体(30)は、複数の分割板(33)を分解可能に組立てることによって円板を形成するものであり、
各組の軸支ユニット(42)における回転軸(40)と軸受(41)の一方をアンカーボルト(43)の連結部(43b)に固定し、他方を弁本体(30)に固定してあることを特徴とする下水道の止水装置。
A butterfly valve (3) that opens and closes a sewer pipe (1) having a circular cross section made of concrete, and a support device (4) that supports the butterfly valve (3) in a swingable manner at the right and left of the middle part of the sewer pipe (1). And an opening / closing device (5) for opening and closing the butterfly valve (3),
The opening / closing device (5) is installed downstream of the installation location of the butterfly valve (3), in the manhole (2) leading to the sewer pipe (1) or in the sewer pipe (1).
The support device (4) includes two sets of a shaft support unit (42) including a rotation shaft (40) and a bearing (41) serving as a rotation center of the butterfly valve (3), and a height intermediate portion of the sewer pipe (1). Anchor bolts (43) for detachably fixing the pivot support unit (42) to the left and right of the
The anchor bolt (43) is inserted into the insertion hole (49) formed in the sewer pipe (1) at the implanted portion (43a) and solidified with an adhesive (49a), and the connecting portion (43b) on the opposite side is fixed. It protrudes inside the sewer pipe (1),
The butterfly valve (3) includes a valve body (30) having a smaller diameter than the sewer pipe (1), and a sealing material (31) protruding outward and fixed along the outer peripheral edge of the valve body (30). Prepared,
The valve body (30) forms a disk by assembling a plurality of divided plates (33) so that they can be disassembled,
One of the rotating shaft (40) and the bearing (41) in each set of pivot support units (42) is fixed to the connecting portion (43b) of the anchor bolt (43), and the other is fixed to the valve body (30). Sewer water stop device characterized by that.
バタフライ弁(3)は、軸支ユニット(42)を収容する保護筒(32)を弁本体(30)の左右に備え、保護筒(32)の外側端部に沿って別のシール材(36)を外側に張り出して固定してあることを特徴とする請求項1記載の下水道の止水装置。   The butterfly valve (3) includes protective cylinders (32) for housing the pivot support units (42) on the left and right sides of the valve body (30), and another sealing material (36) along the outer end of the protective cylinder (32). The water stop device for a sewage system according to claim 1, characterized in that it projects outward and is fixed. 開閉装置(5)は、マンホール(2)の下部に着脱可能に固定することを特徴とする請求項2記載の下水道の止水装置。   The sewer water stop device according to claim 2, wherein the switchgear (5) is detachably fixed to the lower part of the manhole (2). 開閉装置(5)は、マンホール(2)に着脱可能に固定する載置台(50)と、載置台(50)に載せるシリンダ装置(51)とを備え、
シリンダ装置(51)は、ピストンロッド(53)の先部を弁本体(30)の揺動端側に連結し、載置台(50)に対してシリンダ(52)を揺動可能に連結してあることを特徴とする請求項3記載の下水道の止水装置。
The opening / closing device (5) includes a mounting table (50) that is detachably fixed to the manhole (2), and a cylinder device (51) that is mounted on the mounting table (50).
The cylinder device (51) has a tip portion of a piston rod (53) connected to the swing end side of the valve body (30), and a cylinder (52) is swingably connected to the mounting table (50). The sewer water stop device according to claim 3, wherein the water stop device is provided.
JP2008130751A 2008-05-19 2008-05-19 Cut-off apparatus for sewer Withdrawn JP2009275494A (en)

Priority Applications (1)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012117575A (en) * 2010-11-30 2012-06-21 Kurimoto Ltd Biplane valve

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012117575A (en) * 2010-11-30 2012-06-21 Kurimoto Ltd Biplane valve

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