JP4245999B2

JP4245999B2 - Channel device for flow measurement

Info

Publication number: JP4245999B2
Application number: JP2003195580A
Authority: JP
Inventors: ▲きよし▼ 後藤
Original assignee: ペンタフ株式会社
Priority date: 2003-07-11
Filing date: 2003-07-11
Publication date: 2009-04-02
Anticipated expiration: 2023-07-11
Also published as: JP2005030881A

Description

【０００１】
【発明の属する技術分野】
この発明は、流量計測用水路装置に関する。
【０００２】
【従来の技術】
【特許文献１】
登録実用新案第３０６１７１５号公報
例えば下水（排水）の流量を計測するために、上流側の下水管と下流側の下水管を連通させるようマンホールの底部に形成されたインバート上に設置されるフリュームを備えた流量計測用水路装置がある（前記特許文献１参照）。このフリュームには流量計が設置されており、フリュームを通過する下水は、常流の状態から、絞り部分で限界流となり、更に斜流へと変化し、この限界流の流速が水位と重力の関数になること、絞りの直前の上流側水深がこの限界流の水深と相関することを利用して上流側の計測水深から流量を演算している。
【０００３】
【発明が解決しようとする課題】
ところで、フリュームをインバート上に設置するにあたり、フリュームをインバートに対して水平に位置させながら、フリュームの上流側を上流側の下水管に接続できるようフリュームを固定する必要がある。そのため、フリュームのインバートに対する水平度を水平計（fish eye level）でチェックした後、水平状態のままフリュームをマンホールの縦壁に、急結セメントや接着剤を用いて人力で施工する必要があり、施工作業に手間がかかっていた。また、急結セメントや接着剤を用いるので、コスト高になっていた。
【０００４】
この発明は上述の事柄に留意してなされたもので、その目的は、フリュームのインバートに対する水平度をチェックしながらフリュームを容易な作業でシール可能に設置できる流量計測用水路装置を提供することである。
【０００５】
【課題を解決するための手段】
上記目的を達成するために、この発明の流量計測用水路装置は、水路における水の流量を計測するために、上流側の管と下流側の管を連通させるようマンホールの底部に形成されたインバート上に設置されるフリュームを備えた流量計測用水路装置において、前記フリュームは、上流側の管に嵌込可能で、上流側の方向に突出した縦断面が円弧状の嵌込部分と、前記嵌込部分の上部後端位置から上方に至り上流側の管の上部左右端面に当接するよう所定間隔を有して左右対称に形成された上流端面とよりなる正面視Ｕ字状の接続部を上流端に有し、更に、前記フリュームは、この接続部を上流側の管にシール可能に接続するための接続手段と、前記フリュームを前記インバートに対して水平に位置させるための手段とを有する（請求項１）。
【０００６】
【０００７】
また、この発明は別の観点から、水路における水の流量を計測するために、上流側の管と下流側の管を連通させるようマンホールの底部に形成されたインバート上に設置されるフリュームを備えた流量計測用水路装置において、前記フリュームは、上流側の管に嵌込可能で、上流側の方向に突出した縦断面が円弧状の嵌込部分と、前記嵌込部分の後端位置から上方に至り上流側の管の上部端面に当接するよう形成された板体部分とよりなる接続部を上流端に有し、更に、前記フリュームは、この接続部を前記上流側の管にシール可能に接続するための接続手段と、前記フリュームを前記インバートに対して水平に位置させるための手段とを有することを特徴とする流量計測用水路装置を提供する（請求項３）。
【０００８】
更に、この発明は、水路における水の流量を計測するために、上流側の管と下流側の管を連通させるようマンホールの底部に形成されたインバート上に設置されるフリュームを備えた流量計測用水路装置において、前記フリュームは、上流側の管に嵌込可能で、上流側の方向に突出した縦断面が円弧状の嵌込部分と、前記嵌込部分の上部後端位置から上方に至り上流側の管の上部左右端面に当接するよう所定間隔を有して左右対称に形成された縦部分とよりなる正面視Ｕ字状の接続部を上流端に有し、更に、前記フリュームは、この接続部を上流側の管にシール可能に接続するための接続手段と、前記フリュームを前記インバートに対して水平に位置させるための手段とを有することを特徴とする流量計測用水路装置を提供する（請求項５）。
【０００９】
【発明の実施の形態】
以下、この発明の実施形態を、図を参照しながら説明するが、それによってこの発明は限定されるものではない。
【００１０】
図１〜図５は、この発明の第１の実施形態を示す。
【００１１】
図１〜図５において、１は、上流側の下水管５の出口５ａ、下流側の下水管６の入口６ａが形成された人孔直壁部１ａを有するマンホール、２は、樹脂製のフリューム３を通過する下水の流量を計測するためのポータブル型流量計で、水位センサ２ａと計測演算・表示部２ｂよりなる。
【００１２】
前記フリューム３は、縦断面ほぼＵ字状のフリューム本体３ａと、上流端および下流端間の流れの方向に沿う状態で一対の外向きのフランジ３ｂ，３ｂをフリューム本体３ａの上端に有する。前記水位センサ２ａはワンタッチで前記フランジ３ｂ，３ｂ間に取り付けられた上流側リブ３ｃに設置できる。また、前記フランジ３ｂ，３ｂ間に取り付けられた下流側リブ３ｃ’にはフリューム３のインバート４に対する水平度をチェックするための水平計（fish eye level）２’が設置されている。４は、フリューム３を設置するための逆アーチ型のインバートで、マンホール１の底部に形成されている。そして、下水は、上流側の下水管５からフリューム３を通過して下流側の下水管６に流れる。フリューム３を通過する下水は、常流の状態から、絞り部分７で限界流となり、更に斜流へと変化する。
【００１３】
以下、特徴的構成について説明する。
【００１４】
前記フリューム３の前記本体３ａは、下水管５に嵌込可能な縦断面が円弧状の嵌込部分８を有する。この嵌込部分８は、前記フリューム本体３ａの上流端面９から所定長さだけ上流側の方向に突出した状態で形成されている。この上流端面９は、縦断面ほぼＵ字状の部材を、嵌込部分８を残す形で縦方向に切欠いたときに形成されるものである。すなわち、前記上流端面９は、嵌込部分８の上部後端位置Ｔから上方に至るよう所定間隔を有して左右対称に形成されており、下水管５に嵌込部分８が嵌込まれた状態では下水管５の上部左右端面に当接する。そして、嵌込部分８と前記上流端面９，９とから正面視Ｕ字状の接続部１０が構成される。
【００１５】
前記フリューム３には、前記接続部１０を上流側の下水管５にワンタッチでシール可能に接続するための接続手段が設けられている。この接続手段は、嵌込部分８の外周側に設けられる縦断面が円弧状の弧状部材１１と、嵌込部分８の外周面と弧状部材１１の内周面間に介装される一つの第１のパッキン１３と、一対の第２のパッキン１４，１４と、下水管５に嵌込部分８が嵌込まれた状態で、下水管５の内周面と弧状部材１１の外周面間に介装される一つの第３のパッキン１２とを有する。弧状部材１１は、嵌込部分８、第１のパッキン１３、第３のパッキン１２と共に上流側の下水管５に挿入されるもので、前記嵌込部分８よりも円弧長さが長く、上流側の下水管５への挿入時は縮径可能で、かつ、挿入後は拡径可能に構成されている。そして、弧状部材１１は、弧部分１１ａを有するとともに、弧部分１１ａの一端および他端がそれぞれ下向きに折り曲げられてなる把持部としての折り曲げ部分１１ｂを両開放端に有する。そして、折り曲げ部分１１ｂが嵌込部分８の両端よりも突出するよう第１のパッキン１３を介して嵌込部分８に弧状部材１１が設けられる。この実施形態では、弧状部材１１は、人力で上流側の下水管５に挿入できるよう縮径可能で、かつ、挿入後は拡がる方向に弾性を持つ例えば金属材料で形成されている。そして、弧状部材１１の縮径作業が人力で容易に行えるように、また、下水管５に挿入された縮径状態の弧状部材１１の拡径作業が人力で容易に行えるように弧状部材１１には把持部として機能する前記一対の折り曲げ部分１１ｂが設けられている。
【００１６】
前記第１のパッキン１３は、平面視門型形状をなし、両脚１３ａ，１３ａを繋ぐ細長い天面部分１３ｂの長手方向の長さは、嵌込部分８の円弧長さとほぼ等しい長さに設定されており、また、両脚１３ａ，１３ａの長さは嵌込部分８の突出長さにほぼ等しく設定されている。
【００１７】
前記第２のパッキン１４は、縦長の直方体形状をなし、フリューム本体３ａの左右の上流端面９，９の外側、すなわち、フリューム本体３ａの両側面に内側面が固着された状態でそれぞれ設けられている。下水管５に嵌込部分８が嵌込まれた状態では、第２のパッキン１４の上流側の面１４ａは下水管５の上部左右端面に当接する。そして、マンホール１の前記人孔直壁部１ａと出口５ａとの密着性を高めるために、第２のパッキン１４の外側面１４ｄにおける下端の先端部分１４ｂは下方へ行くほど細い先細りのテーパ形状をなす。１４ｃは、第２のパッキン１４の下端の最先端部分で薄肉に形成されている。更に、この最先端部分１４ｃと第１のパッキン１３の前記脚１３ａとが当接してシール性を高めるよう第１のパッキン１３と第２のパッキン１４の取り付け位置が設定されている。
【００１８】
前記第３のパッキン１２は、弧状部材１１の外周面全体を覆うよう設けられるもので、最上流側に円弧状の空気層１２ａを有する。この第３のパッキン１２は、平面視長方形のものを一方の長辺の側から短手方向に沿って短辺Ｓの長さの半分未満の長さＦ（Ｆ＜Ｓ／２）に折って折り曲げたものである。１２ｂはその折り曲げ部分であり、この折り曲げ部分１２ｂの側を弧状部材１１の外周面にあてながら弧状部材１１の外周面全体が第３のパッキン１２によって覆われる。そのため、折り曲げ部分１２ｂと残りの部分１２ｃとの間に前記空気層１２ａを形成できる。この空気層１２ａにより、下水管５に嵌込部分８が嵌込まれたときに下水管５と弧状部材１１間のシール性（止水性）を向上できる。
【００１９】
１５および１６は、第１のパッキン１３を嵌込部分８、弧状部材１１間に位置決めするとともに、第３のパッキン１２を弧状部材１１に位置決めして外れないようするために、嵌込部分８および弧状部材１１にそれぞれ穿設した位置決め用の孔である。１７および１８は、前記孔１５，６に嵌込められるビスおよびビス固定ねじである。
【００２０】
１９，１９は、フリューム３をインバート４に対して水平に位置させるにあたり、フリューム３のインバート４に対する高さ調整を行うために用いる一対の長ビスで、フランジ３ｂ，３ｂと下流側リブ３ｃ’の二つの交点位置に設けられている。そして、フリューム３の高さ調整は、左右の長ビス１９，１９をインバート４までねじ込んで締付ける締付け量で決定できる。
【００２１】
そして、前記水平計（fish eye level）２’と長ビス１９，１９とインバート４とから、フリューム３をインバート４に対して水平に位置させるための手段が構成される。
【００２２】
而して、ビス１７によって、フリューム本体３ａの嵌込部分８に第１のパッキン１３、弧状部材１１および第３のパッキン１２をこの順で取り付けてなるフリューム３を予め作製しておく。そして、この作製されたフリューム３をインバート４上に搬送し、第３のパッキン１２、弧状部材１１および第１のパッキン１３を介して、フリューム３の接続部１０を上流側の下水管５内に一旦接続する。この場合、人力で前記一対の折り曲げ部分１１ｂを操作することで、フリューム３を上流側の下水管５内にワンタッチでシール可能に接続できる。すなわち、弧状部材１１は人力により縮径され、第１のパッキン１３を嵌込部分８とで挟んだ状態で、第３のパッキン１２と共に上流側の下水管５に挿入され、挿入後は弧状部材１１の弾性力で拡径して、弧状部材１１の表面全体が上流側の下水管５の内面を押圧するよう上流側の下水管５の内面に、第３のパッキン１２を介して密着する。この場合、空気層１２ａにより、下水管５と弧状部材１１間のシール性（止水性）を向上できる。そして、弧状部材１１を挿入時のように縮径変形するなどして弧状部材１１を水平になるようフリューム３を上流側の下水管５の軸心まわりに回動させ、この状態で、水平計（fish eye level）２’にてフリューム３自体の水平度をチェックすることにより、従来に比して作業性が飛躍的に向上するとともに、下水（排水）の流量を精度よく計測できる。また、急結セメントや接着剤を用いないのでコスト安にできる。
【００２３】
図６は、上記第１の実施形態で用いた、拡がる方向に弾性を持つ弧状部材１１’に、弧状部材１１’の縮径操作を容易にするためのターンバックル２０を設けたこの発明の第２の実施形態を示す。なお、図６において、図１〜図５に示した符号と同一のものは、同一または相当物である。
【００２４】
図６において、２０はターンバックルである。２１は、一対のブラケットで、弧状部材１１’の両開口端に形成されている。２２は、ブラケット２１の各々に穿設されたピン孔である。ターンバックル２０は、二つのねじ軸部２４と、各ねじ軸部２４の外端をピン２３でブラケット２１に連結されている。２５は、各ねじ軸部２４の内端側に螺合されているバックル本体で、ブラケット２１，２１間の間隔を調整する。
【００２５】
而して、弧状部材１１’はターンバックル２０の縮径操作により縮径し、上流側の下水管５に挿入され、挿入後はターンバックル２０の拡径操作により弧状部材１１’は拡径して、弧状部材１１’の表面全体が第３のパッキン１２を介して上流側の下水管５の内面を押圧するよう上流側の下水管５の内面に密着する。
なお、弧状部材１１’として、拡がる方向に弾性を持つ材料を用いなくてもよい。
【００２６】
図７は、拡がる方向に弾性を持つ材料よりなる弧状部材１１’’に、弧状部材１１’’の縮径操作を容易にするためのバネ３１を用いたこの発明の第３の実施形態を示す。なお、図７において、図１〜図６に示した符号と同一のものは、同一または相当物である。
【００２７】
図７において、３０は、弧状部材１１’’の径を変更する部材で、バネ３１と、バネ３１の両端に設けられた把手部材３２と、把手部材３２が固着される二つの軸部３４とから主としてなる。そして、把手部材３２同士を近づけてバネ３１を圧縮することにより、ブラケット２１，２１間の間隔を調整する。
【００２８】
図８は、この発明の第４の実施形態を示す。なお、図８において、図１〜図７に示した符号と同一のものは、同一または相当物である。
【００２９】
図８において、３’はフリュームである。このフリューム３’は、上流側の下水管に嵌込可能で、上流側の方向に突出した縦断面が円弧状の嵌込部分８と、嵌込部分８の後端位置から上方に至り上流側の下水管の上部端面に当接するよう形成された板体部分４０とよりなる接続部１０’を上流端に有し、更に、前記フリューム３’は、この接続部１０’を上流側の下水管にワンタッチでシール可能に接続するための接続手段と、フリューム３’のインバートに対する水平度を測定した後、フリューム３’を前記インバートに対して水平に位置させるための手段とを有する。
【００３０】
前記接続手段は、前記嵌込部分８の外周側に設けられ、前記嵌込部分８よりも円弧長さが長く、前記上流側の下水管に挿入時は縮径可能で、かつ、挿入後は拡径可能な縦断面が円弧状の弧状部材１１と、前記嵌込部分８と弧状部材１１間に介装されるパッキン１３と、上流側の下水管に前記嵌込部分８が嵌込まれた状態で、前記板体部分４０の前面Ｆと上流側の下水管の上部端面との間に介装されるパッキン４１と、上流側の下水管の内周面と弧状部材１１の外周面間に介装される一つの第３のパッキン１２とを有する。
【００３１】
前記板体部分４０は、正面視門型で、下端面が半円弧状に形成されている。前記パッキン４１は、正面視円弧形状で、板体部分４０の前面Ｆで、板体部分４０の内周側に沿って予め固着されている。
【００３２】
図９は、参考例を示す。なお、図９において、図１〜図８に示した符号と同一のものは、同一または相当物である。
【００３３】
図９において、３’’はフリュームである。このフリューム３’’は、上流側の下水管に嵌込可能で、上流側の方向に突出した筒状の嵌込部分５０と、嵌込部分５０と上流側の下水管間に介装される前記パッキン１２とを有する。
【００３４】
図１０は、この発明の第５の実施形態を示す。なお、図１０において、図１〜図９に示した符号と同一のものは、同一または相当物である。
【００３５】
図１０において、フリューム３’’’は、上流側の下水管に嵌込可能で、上流側の方向に突出した縦断面が円弧状の嵌込部分８と、嵌込部分８の上部後端位置から上方に至り上流側の下水管の上部左右端面に当接するよう所定間隔を有して左右対称に形成された縦部分６０とよりなる正面視Ｕ字状の接続部を上流端に有し、更に、フリューム３’’’は、この接続部を上流側の下水管にシール可能に接続するための接続手段と、フリューム’’’をインバートに対して水平に位置させるための手段とを有する。前記接続手段は、嵌込部分８の外周側に設けられ、嵌込部分８よりも円弧長さが長く、上流側の下水管に挿入時は縮径可能で、かつ、挿入後は拡径可能な縦断面が円弧状の弧状部材１１と、嵌込部分８と弧状部材１１間に介装される第１のパッキン１３と、上流側の下水管に嵌込部分８が嵌込まれた状態で、各縦部分６０の前面Ｆ’と上流側の下水管の上部左右端面との間にそれぞれ介装される第２のパッキン６３，６３とを有する。そして、前記水平計（fish eye level）と前記長ビスとインバートとから、フリューム３’’’をインバートに対して水平に位置させるための手段が構成される。
【００３６】
【発明の効果】
以上説明したようにこの発明では、フリュームのインバートに対する水平度をチェックしながらフリュームを容易な作業でシール可能に設置できる流量計測用水路装置を提供することができる。
【図面の簡単な説明】
【図１】この発明の第１の実施形態における使用状態を示す斜視図である。
【図２】上記実施形態を示す平面図である。
【図３】上記実施形態において、上流側の管との接続状態を説明するための構成説明図である。
【図４】上記実施形態を示す縦断面図である。
【図５】上記実施形態を示す要部分解斜視図である。
【図６】この発明の第２の実施形態を示す縦断面図である。
【図７】この発明の第３の実施形態を示す縦断面図である。
【図８】この発明の第４の実施形態を示す斜視図である。
【図９】参考例を示す斜視図である。
【図１０】この発明の第５の実施形態を示す斜視図である。
【符号の説明】
１…マンホール、３…フリューム、４…インバート、５…上流側の管、６…下流側の管、８…嵌込部分、９…上流端面、１０…接続部、１１…弧状部材、１２…第３のパッキン、１３…第１のパッキン、１４，１４…第２のパッキン、１９，１９…長ビス。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a flow channel device for flow measurement.
[0002]
[Prior art]
[Patent Document 1]
For example, in order to measure the flow rate of sewage (drainage), a flume installed on an invert formed at the bottom of a manhole so as to communicate the upstream sewage pipe and the downstream sewage pipe is provided. There is a water channel device for flow measurement provided (see Patent Document 1). This flume is equipped with a flow meter, and the sewage that passes through the flume changes from a normal flow state to a limit flow at the constriction and further to a diagonal flow. The flow rate is calculated from the upstream measured depth by using the fact that the upstream depth just before the throttling correlates with the depth of the critical flow.
[0003]
[Problems to be solved by the invention]
By the way, when installing the flume on the invert, it is necessary to fix the flume so that the upstream side of the flume can be connected to the upstream sewer pipe while the flume is positioned horizontally with respect to the invert. Therefore, after checking the level of flume against the invert with a fish eye level, it is necessary to manually install the flume on the vertical wall of the manhole using quick-setting cement or adhesive. It took a lot of work to do the construction work. In addition, the use of quick setting cement or adhesive increases the cost.
[0004]
The present invention has been made in consideration of the above-mentioned matters, and an object of the present invention is to provide a water flow measuring device that can install a flume in a sealable manner with easy work while checking the level of the flume with respect to the invert. .
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the flow channel device for flow measurement according to the present invention is an invert unit formed at the bottom of a manhole so as to connect an upstream pipe and a downstream pipe in order to measure the flow rate of water in the water channel. In the flow measuring channel device having a flume installed on the pipe, the flume can be fitted into the upstream pipe, and the vertical section protruding in the upstream direction has an arcuate fitting part, and the fitting part From the upper rear end position of the tube, a U-shaped connecting portion having a U-shape in front view comprising an upstream end surface formed symmetrically with a predetermined interval so as to contact the upper left and right end surfaces of the upstream pipe is formed at the upstream end. The flume further includes connecting means for sealingly connecting the connecting portion to the upstream pipe, and means for positioning the flume horizontally with respect to the invert. 1).
[0006]
[0007]
In another aspect, the present invention further includes a flume installed on an invert formed at the bottom of the manhole so as to communicate the upstream pipe and the downstream pipe in order to measure the flow rate of water in the water channel. In the flow measuring channel device, the flume can be fitted into the upstream pipe, and the longitudinal section protruding in the upstream direction has an arcuate fitting part and the rear part of the fitting part upward from the rear end position. The upstream end has a connecting portion composed of a plate portion formed so as to contact the upper end surface of the upstream pipe, and the flume is connected to the upstream pipe in a sealable manner. And a means for positioning the flume horizontally with respect to the invert. (Claim 3 )
[0008]
Further, the present invention provides a flow rate measuring water channel comprising a flume installed on an invert formed at the bottom of a manhole so as to communicate the upstream side tube and the downstream side tube in order to measure the flow rate of water in the water channel. In the apparatus, the flume can be fitted into the upstream pipe, and the longitudinal section projecting in the upstream direction has an arcuate fitting part, and the upstream part extends upward from the upper rear end position of the fitting part. A connecting portion having a U-shape in a front view comprising a vertical portion formed symmetrically with a predetermined interval so as to abut on the upper left and right end surfaces of the pipe of the tube, and further, the flume is connected to the connecting portion. A flow measuring waterway device is provided, characterized in that it has connecting means for sealingly connecting a section to an upstream pipe and means for horizontally positioning the flume with respect to the invert (claim) Item 5 ) .
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings, but the present invention is not limited thereby.
[0010]
1 to 5 show a first embodiment of the present invention.
[0011]
1 to 5, reference numeral 1 denotes a manhole having a manhole straight wall 1a in which an outlet 5a of an upstream sewage pipe 5 and an inlet 6a of a downstream sewage pipe 6 are formed, and 2 a resin-made flume. 3 is a portable flow meter for measuring the flow rate of sewage passing through 3, and comprises a water level sensor 2a and a measurement calculation / display unit 2b.
[0012]
The flume 3 has a flume body 3a having a substantially U-shaped longitudinal section and a pair of outward flanges 3b, 3b at the upper end of the flume body 3a in a state along the flow direction between the upstream end and the downstream end. The water level sensor 2a can be installed on the upstream rib 3c attached between the flanges 3b and 3b with one touch. Further, a downstream side rib 3c ′ attached between the flanges 3b and 3b is provided with a fish eye level 2 ′ for checking the level of the flume 3 with respect to the invert 4. Reference numeral 4 denotes an inverted arch type invert for installing the flume 3, which is formed at the bottom of the manhole 1. Then, the sewage flows from the upstream sewage pipe 5 through the flume 3 to the downstream sewage pipe 6. The sewage passing through the flume 3 changes from a normal flow state to a limit flow at the throttle portion 7 and further to a diagonal flow.
[0013]
Hereinafter, a characteristic configuration will be described.
[0014]
The main body 3a of the flume 3 has a fitting portion 8 whose longitudinal section that can be fitted into the sewer pipe 5 has an arc shape. The fitting portion 8 is formed in a state protruding from the upstream end surface 9 of the flume body 3a in the upstream direction by a predetermined length. The upstream end face 9 is formed when a member having a substantially U-shaped longitudinal section is cut out in the longitudinal direction so as to leave the fitting portion 8. That is, the upstream end surface 9 is formed symmetrically with a predetermined interval so as to reach the upper portion from the upper rear end position T of the fitting portion 8, and the fitting portion 8 is fitted into the sewer pipe 5. In the state, it contacts the upper left and right end surfaces of the sewer pipe 5. And the fitting part 8 and the said upstream end surfaces 9 and 9 comprise the connection part 10 of front view U shape.
[0015]
The flume 3 is provided with connecting means for connecting the connecting portion 10 to the upstream sewage pipe 5 in a one-touch sealable manner. This connecting means includes an arcuate member 11 having an arcuate vertical cross section provided on the outer peripheral side of the fitting portion 8, and a first intervening member interposed between the outer peripheral surface of the fitting portion 8 and the inner peripheral surface of the arcuate member 11. One packing 13, a pair of second packings 14, 14, and a fitting portion 8 fitted in the sewer pipe 5, are interposed between the inner peripheral surface of the sewer pipe 5 and the outer peripheral surface of the arc-shaped member 11. And a third packing 12 to be mounted. The arc-shaped member 11 is inserted into the sewage pipe 5 on the upstream side together with the fitting portion 8, the first packing 13, and the third packing 12, and has a longer arc length than the fitting portion 8, and the upstream side The diameter can be reduced when inserted into the sewage pipe 5, and the diameter can be increased after insertion. And the arc-shaped member 11 has the arc part 11a, and has the bending part 11b as a holding part formed by bending one end and the other end of the arc part 11a downward at both open ends. And the arcuate member 11 is provided in the fitting part 8 via the 1st packing 13 so that the bending part 11b may protrude rather than the both ends of the fitting part 8. FIG. In this embodiment, the arc-shaped member 11 can be reduced in diameter so that it can be inserted into the upstream sewage pipe 5 by human power, and is formed of, for example, a metal material having elasticity in the direction of expansion after insertion. The arc-shaped member 11 can be easily reduced in diameter by the manual operation, and the reduced diameter arc-shaped member 11 inserted into the sewer pipe 5 can be easily expanded by the manual operation. Are provided with the pair of bent portions 11b functioning as gripping portions.
[0016]
The first packing 13 has a plan view type shape, and the length in the longitudinal direction of the elongated top surface portion 13b connecting both the legs 13a, 13a is set to be substantially equal to the arc length of the fitting portion 8. In addition, the lengths of both legs 13a and 13a are set substantially equal to the protruding length of the fitting portion 8.
[0017]
The second packing 14 has a vertically long rectangular parallelepiped shape, and is provided in a state where inner side surfaces are fixed to the outer sides of the left and right upstream end surfaces 9, 9 of the flume body 3a, that is, both side surfaces of the flume body 3a. Yes. In a state where the fitting portion 8 is fitted into the sewer pipe 5, the upstream surface 14 a of the second packing 14 contacts the upper left and right end faces of the sewer pipe 5. And in order to improve the adhesiveness of the said manhole straight wall part 1a and the exit 5a of the manhole 1, the front-end | tip part 14b of the lower end in the outer surface 14d of the 2nd packing 14 becomes a taper shape which becomes thin and taper so that it goes below. Eggplant. 14 c is formed thin at the tip of the lower end of the second packing 14. Further, the mounting positions of the first packing 13 and the second packing 14 are set so that the most advanced portion 14c and the leg 13a of the first packing 13 come into contact with each other to improve the sealing performance.
[0018]
The third packing 12 is provided so as to cover the entire outer peripheral surface of the arc-shaped member 11, and has an arc-shaped air layer 12a on the most upstream side. The third packing 12 has a rectangular shape in plan view and is folded from one long side to the length F (F <S / 2) that is less than half the length of the short side S along the short side direction. It is a bent one. Reference numeral 12 b denotes a bent portion. The entire outer peripheral surface of the arc-shaped member 11 is covered with the third packing 12 while the side of the bent portion 12 b is applied to the outer peripheral surface of the arc-shaped member 11. Therefore, the air layer 12a can be formed between the bent portion 12b and the remaining portion 12c. By this air layer 12a, when the fitting portion 8 is fitted into the sewage pipe 5, the sealing performance (waterproofness) between the sewage pipe 5 and the arcuate member 11 can be improved.
[0019]
15 and 16 position the first packing 13 between the fitting portion 8 and the arcuate member 11, and position the third packing 12 on the arcuate member 11 so as not to come off and These are positioning holes respectively drilled in the arc-shaped member 11. Reference numerals 17 and 18 denote screws and screw fixing screws which are fitted into the holes 15 and 6, respectively.
[0020]
Reference numerals 19 and 19 denote a pair of long screws used to adjust the height of the flume 3 relative to the invert 4 when the flume 3 is positioned horizontally with respect to the invert 4, and the flanges 3b and 3b and the downstream rib 3c ' It is provided at two intersection positions. The height adjustment of the flume 3 can be determined by a tightening amount in which the left and right long screws 19 and 19 are screwed to the invert 4 and tightened.
[0021]
And the means for positioning the flume 3 horizontally with respect to the invert 4 is comprised from the said level meter (fish eye level) 2 ', the long screws 19 and 19, and the invert 4. FIG.
[0022]
Thus, the flume 3 in which the first packing 13, the arc-shaped member 11 and the third packing 12 are attached in this order to the fitting portion 8 of the flume main body 3 a with the screw 17 is prepared in advance. Then, the produced flume 3 is conveyed onto the invert 4, and the connecting portion 10 of the flume 3 is placed in the upstream sewage pipe 5 through the third packing 12, the arc-shaped member 11, and the first packing 13. Connect once. In this case, the flume 3 can be connected to the upstream sewage pipe 5 in a one-touch sealable manner by manipulating the pair of bent portions 11b by human power. That is, the arc-shaped member 11 is reduced in diameter by human power, and is inserted into the upstream sewage pipe 5 together with the third packing 12 with the first packing 13 sandwiched between the fitting portions 8. 11 is expanded by the elastic force of 11, and the entire surface of the arc-shaped member 11 is in close contact with the inner surface of the upstream sewage pipe 5 via the third packing 12 so as to press the inner surface of the upstream sewage pipe 5. In this case, the air layer 12a can improve the sealing performance (waterstop) between the sewer pipe 5 and the arcuate member 11. Then, the flume 3 is rotated around the axis of the upstream sewage pipe 5 so that the arc-shaped member 11 becomes horizontal by reducing the diameter of the arc-shaped member 11 at the time of insertion. By checking the level of the flume 3 itself at (fish eye level) 2 ′, the workability is dramatically improved as compared with the conventional one, and the flow rate of sewage (drainage) can be measured with high accuracy. In addition, since no quick setting cement or adhesive is used, the cost can be reduced.
[0023]
FIG. 6 shows a first embodiment of the present invention in which a turnbuckle 20 for facilitating the diameter-reducing operation of the arc-shaped member 11 ′ is provided on the arc-shaped member 11 ′ having elasticity in the expanding direction used in the first embodiment. 2 shows an embodiment. In FIG. 6, the same reference numerals as those shown in FIGS. 1 to 5 are the same or equivalent.
[0024]
In FIG. 6, 20 is a turnbuckle. 21 are a pair of brackets, which are formed at both open ends of the arc-shaped member 11 ′. Reference numeral 22 denotes a pin hole formed in each of the brackets 21. The turnbuckle 20 has two screw shaft portions 24 and the outer ends of the screw shaft portions 24 are connected to the bracket 21 by pins 23. Reference numeral 25 denotes a buckle body that is screwed to the inner end side of each screw shaft portion 24 and adjusts the distance between the brackets 21 and 21.
[0025]
Thus, the arcuate member 11 ′ is reduced in diameter by the diameter reducing operation of the turnbuckle 20 and inserted into the upstream sewage pipe 5. After the insertion, the arcuate member 11 ′ is increased in diameter by the diameter increasing operation of the turnbuckle 20. Thus, the entire surface of the arc-shaped member 11 ′ is in close contact with the inner surface of the upstream sewage pipe 5 so as to press the inner surface of the upstream sewage pipe 5 through the third packing 12.
Note that a material having elasticity in the expanding direction may not be used as the arc-shaped member 11 ′.
[0026]
FIG. 7 shows a third embodiment of the present invention in which a spring 31 for facilitating a diameter-reducing operation of the arc-shaped member 11 ″ is used for the arc-shaped member 11 ″ made of a material having elasticity in the expanding direction. . 7 that are the same as those shown in FIGS. 1 to 6 are the same or equivalent.
[0027]
In FIG. 7, reference numeral 30 denotes a member for changing the diameter of the arcuate member 11 ″, a spring 31, a handle member 32 provided at both ends of the spring 31, and two shaft portions 34 to which the handle member 32 is fixed. It consists mainly of. And the space | interval between the brackets 21 and 21 is adjusted by approaching the handle members 32 and compressing the spring 31.
[0028]
FIG. 8 shows a fourth embodiment of the present invention. In FIG. 8, the same reference numerals as those shown in FIGS. 1 to 7 are the same or equivalent.
[0029]
In FIG. 8, 3 'is a flume. The flume 3 ′ can be fitted into the upstream sewage pipe, and the longitudinal section protruding in the upstream direction extends upward from the rear end position of the fitting part 8 and the fitting part 8, and the upstream side. A connecting portion 10 'formed of a plate body portion 40 formed so as to come into contact with the upper end surface of the sewage pipe is provided at the upstream end, and the flume 3' further includes the connecting portion 10 'at the upstream sewage pipe. And a means for connecting the flume 3 ′ horizontally with respect to the invert after measuring the level of the flume 3 ′ with respect to the invert.
[0030]
The connecting means is provided on the outer peripheral side of the fitting portion 8, has an arc length longer than the fitting portion 8, can be reduced in diameter when inserted into the upstream sewage pipe, and after insertion The arcuate member 11 having an arcuate longitudinal section that can be expanded in diameter, the packing 13 interposed between the fitting part 8 and the arcuate member 11, and the fitting part 8 fitted in the upstream sewage pipe. In the state, a packing 41 interposed between the front surface F of the plate portion 40 and the upper end surface of the upstream sewage pipe, and between the inner peripheral surface of the upstream sewage pipe and the outer peripheral surface of the arc member 11. It has one third packing 12 interposed.
[0031]
The plate body portion 40 is a front view type, and a lower end surface is formed in a semicircular arc shape. The packing 41 has a circular arc shape when viewed from the front, and is fixed in advance along the inner peripheral side of the plate body portion 40 on the front surface F of the plate body portion 40.
[0032]
FIG. 9 shows a reference example . In FIG. 9, the same reference numerals as those shown in FIGS. 1 to 8 are the same or equivalent.
[0033]
In FIG. 9, 3 ″ is a flume. The flume 3 '' can be fitted into the upstream sewage pipe, and is inserted between the tubular fitting part 50 protruding in the upstream direction and the fitting part 50 and the upstream sewage pipe. The packing 12 is included.
[0034]
FIG. 10 shows a fifth embodiment of the present invention. In FIG. 10, the same reference numerals as those shown in FIGS. 1 to 9 are the same or equivalent.
[0035]
In FIG. 10, the flume 3 ′ ″ can be fitted into the upstream sewage pipe, and the vertical section protruding in the upstream direction has an arcuate fitting part 8, and the upper rear end position of the fitting part 8. A U-shaped connecting portion having a U-shape in front view and a vertical portion 60 formed symmetrically with a predetermined interval so as to contact the upper left and right end surfaces of the upstream sewage pipe from the upper side, Further, the flume 3 ′ ″ has connection means for connecting the connecting portion to the upstream sewer pipe in a sealable manner, and means for positioning the flume ′ ″ horizontally with respect to the invert. The connecting means is provided on the outer peripheral side of the fitting portion 8, has a longer arc length than the fitting portion 8, can be reduced in diameter when inserted into the upstream sewage pipe, and can be expanded after insertion. The arcuate member 11 having an arcuate vertical cross section, the first packing 13 interposed between the fitting part 8 and the arcuate member 11, and the fitting part 8 fitted in the upstream sewer pipe The second packing 63, 63 is interposed between the front surface F ′ of each vertical portion 60 and the upper left and right end surfaces of the upstream sewage pipe. And the means for positioning flume 3 '''horizontally with respect to invert is comprised from the said level meter (fish eye level), said long screw, and invert.
[0036]
【The invention's effect】
As described above, according to the present invention, it is possible to provide a flow rate measuring channel device capable of installing a flume so as to be able to be sealed with an easy operation while checking the level of the flume with respect to the invert.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a use state in a first embodiment of the present invention.
FIG. 2 is a plan view showing the embodiment.
FIG. 3 is a configuration explanatory diagram for explaining a connection state with an upstream pipe in the embodiment.
FIG. 4 is a longitudinal sectional view showing the embodiment.
FIG. 5 is an exploded perspective view showing a main part of the embodiment.
FIG. 6 is a longitudinal sectional view showing a second embodiment of the present invention.
FIG. 7 is a longitudinal sectional view showing a third embodiment of the present invention.
FIG. 8 is a perspective view showing a fourth embodiment of the present invention.
FIG. 9 is a perspective view showing a reference example .
FIG. 10 is a perspective view showing a fifth embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Manhole, 3 ... Flume, 4 ... Invert, 5 ... Upstream pipe, 6 ... Downstream pipe, 8 ... Insertion part, 9 ... Upstream end surface, 10 ... Connection part, 11 ... Arc-shaped member, 12th 3 packing, 13 ... 1st packing, 14, 14 ... 2nd packing, 19, 19 ... long screw.

Claims

In order to measure the flow rate of water in a water channel, in the flow channel device for flow measurement comprising a flume installed on an invert formed at the bottom of a manhole so that the upstream pipe and the downstream pipe communicate with each other, the flume is A vertical section that can be fitted into the upstream pipe and projecting in the upstream direction is an arcuate fitting part, and the upper left and right end faces of the upstream pipe extending upward from the upper rear end position of the fitting part A connecting portion having a U-shape in front view, which is formed symmetrically with an upstream end surface having a predetermined interval so as to abut against the upstream end, and further, the flume has the connecting portion on the upstream side of the pipe. And a means for connecting the flume horizontally with respect to the invert, and a channel device for measuring a flow rate. .

The connecting means is provided on the outer peripheral side of the fitting portion, has a longer arc length than the fitting portion, can be reduced in diameter when inserted into the upstream pipe, and can be expanded after insertion. An arc-shaped member having an arcuate vertical cross section, a first packing interposed between the fitting portion and the arc-shaped member, and a state where the fitting portion is fitted into an upstream pipe, A second packing provided on the outer side of the upstream end face so as to contact the upper left and right end faces of the pipe, and the fitting part and the upstream pipe in a state where the fitting part is fitted into the upstream pipe. The flow channel device for flow rate measurement according to claim 1, further comprising a third packing interposed therebetween.

In order to measure the flow rate of water in a water channel, in the flow channel device for flow measurement comprising a flume installed on an invert formed at the bottom of a manhole so that the upstream pipe and the downstream pipe communicate with each other, the flume is The longitudinal section protruding in the upstream direction can be fitted into the upstream pipe, and the arcuate fitting part extends upward from the rear end position of the fitting part and contacts the upper end surface of the upstream pipe. A connecting portion comprising a plate portion formed so as to be in contact with the upstream end; and the flume further includes a connecting means for sealingly connecting the connecting portion to the upstream pipe; and the flume. A channel device for measuring flow rate, characterized in that it has a means for being positioned horizontally with respect to the invert.

The connecting means is provided on the outer peripheral side of the fitting portion, has a longer arc length than the fitting portion, can be reduced in diameter when inserted into the upstream pipe, and can be expanded after insertion. In the state where the vertical section has an arc-shaped member, the first packing interposed between the fitting portion and the arc-shaped member, and the fitting portion fitted in the upstream pipe The flow measuring channel device according to claim 3 , further comprising a second packing interposed between the front surface of the portion and the upper end surface of the upstream pipe.

In order to measure the flow rate of water in a water channel, in the flow channel device for flow measurement comprising a flume installed on an invert formed at the bottom of a manhole so that the upstream pipe and the downstream pipe communicate with each other, the flume is A vertical section that can be fitted into the upstream pipe and projecting in the upstream direction is an arcuate fitting part, and the upper left and right end faces of the upstream pipe extending upward from the upper rear end position of the fitting part A connecting portion having a U-shape in front view comprising a vertical portion formed symmetrically with a predetermined interval so as to come into contact with the upper end, and further, the flume has the connecting portion on the upstream side of the pipe. And a means for connecting the flume horizontally with respect to the invert, and a channel device for measuring a flow rate.

The connecting means is provided on the outer peripheral side of the fitting portion, has a longer arc length than the fitting portion, can be reduced in diameter when inserted into the upstream pipe, and can be expanded after insertion. In the state in which the vertical section is an arc-shaped member, the first packing interposed between the fitting portion and the arc-shaped member, and the fitting portion fitted in the upstream pipe, The water flow apparatus for flow rate measurement according to claim 5 , further comprising a second packing interposed between the front surface of the part and the upper left and right end surfaces of the upstream pipe.