JP2005127119A - Draining device in rainwater infiltration basin - Google Patents

Draining device in rainwater infiltration basin Download PDF

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JP2005127119A
JP2005127119A JP2003400675A JP2003400675A JP2005127119A JP 2005127119 A JP2005127119 A JP 2005127119A JP 2003400675 A JP2003400675 A JP 2003400675A JP 2003400675 A JP2003400675 A JP 2003400675A JP 2005127119 A JP2005127119 A JP 2005127119A
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pump
pipe
water level
pump tank
lower limit
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Yutaka Yoneyama
豊 米山
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HOKKAIDO ALFA KK
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HOKKAIDO ALFA KK
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Abstract

<P>PROBLEM TO BE SOLVED: To solve problems in a conventional draining device wherein underground water level rises in rainy season and snow melting season in those districts where underground water level is low and the water level becomes higher easily than the height of inflow pipes and the inflow pipes are clogged, facilities on the upstream side of the inflow pipes become unusable by the reverse flow of drain water, electric fee and much installation cost and running cost are needed such that submerged pumps must be prepared to ready for the failure of the submerged pumps, and failures to easily occur since the submerged pumps are always operated and maintenance is very difficult. <P>SOLUTION: This draining device is formed by disposing a square cylindrical sealed pump tank in a rainwater infiltration basin, connecting an inflow pipe with downward gradient thereto, and installing a discharge pipe with a revere flow prevention valve at a position slightly on the downstream side of the inflow pipe. The submerged pump is installed in the pump tank, and a force-feed pipe is connected to a discharge port and the outlet thereof is opened to a gutter etc. A lower limit sensor and an upper limit sensor detecting the lower limit and upper limit of water level are installed in the submerged pump. In this draining device, when the level of the underground water rising in the rainwater infiltration basin becomes higher than the position of the discharge pipe, the reverse flow prevention valve is closed, and the discharge pipe is clogged to prevent sewage from reversely flowing into the pump tank. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

発明の詳細な説明Detailed Description of the Invention

本発明は、雨水及び家庭用浄化槽の排水などを地中に浸透させる浸透桝及び浸透槽の排水装置に関するものである。  TECHNICAL FIELD The present invention relates to a seepage basin that allows rainwater and wastewater from a domestic septic tank to penetrate into the ground and a drainage device for the seepage tank.

雨水・排水などを地中に浸透させるためにコンクリート製の浸透桝１などを地表１００に埋設し、その浸透桝１に下り勾配を付けた流入管２を接続して雨水及び排水を流入させ地中浸透させる。  In order to infiltrate rainwater / drainage into the ground, a concrete infiltrating basin 1 or the like is embedded in the ground surface 100, and an inflow pipe 2 with a downward slope is connected to the infiltrating basin 1 to allow rainwater and drainage to flow into the ground. Infiltrate inside.

従来の技術１Conventional technology 1

図４に示すように、寒冷地では凍結を防止するために流入管２は凍結深度以上に深く埋設するが地下水位１１１が浅い地域では大雨、雪解け時期に一時的に地下水位が上昇して容易に流入管２より地下水位１１２が高くなり流入管２をふさぎ、排水の逆流などを起こし流入管２上流の施設が使用不能に成る事が有る。  As shown in FIG. 4, in order to prevent freezing in cold regions, the inflow pipe 2 is buried deeper than the freezing depth. Therefore, the groundwater level 112 becomes higher than the inflow pipe 2, and the inflow pipe 2 is blocked, causing a reverse flow of drainage, and the facility upstream of the inflow pipe 2 may become unusable.

従来の技術２Conventional technology 2

従って地下水位の上昇が予め予想される時は図５に示すように、浸透桝１の代りに密閉された円筒もしくは角筒状のポンプ槽３を埋設し流入管２と少し低い位置に流出管３５を接続し流出管３５の出口は側溝７０等に開放する。
ポンプ槽３内に水中ポンプ４を設置し排水管４５を接続して側溝７０等に開放する。Accordingly, when an increase in the groundwater level is expected in advance, as shown in FIG. 5, a sealed cylindrical or square cylindrical pump tank 3 is buried in place of the seepage trough 1 and the outflow pipe is slightly lower than the inflow pipe 2. 35 and the outlet of the outflow pipe 35 is opened to the side groove 70 and the like.
The submersible pump 4 is installed in the pump tank 3 and a drain pipe 45 is connected to open to the side groove 70 and the like.

通常の地下水位が上昇していない状態の排水の流れは、流入管２よりポンプ槽３内に流入しポンプ槽３内たまった排水５２は流出管３５を通って側溝７０等に流出する。The drainage flow in a state where the normal groundwater level has not risen flows into the pump tank 3 from the inflow pipe 2, and the drainage water 52 accumulated in the pump tank 3 flows out to the side groove 70 and the like through the outflow pipe 35.

地下水位が上昇した時の排水の流れは、側溝７０から排水がポンプ槽３内に逆流してくる、この時ポンプ槽３内の水位が高くなると上限センサー４２が働き水中ポンプ４を作動して排水管４５を通して側溝７０に排水する。
排水５２が少なくなって下限センサー４１が働くと水中ポンプ４を停止する。When the groundwater level rises, the drainage flows back into the pump tank 3 from the side groove 70. At this time, when the water level in the pump tank 3 becomes high, the upper limit sensor 42 works to operate the submersible pump 4. The water is drained to the gutter 70 through the drain pipe 45.
When the drainage 52 decreases and the lower limit sensor 41 works, the submersible pump 4 is stopped.

しかし、この方法は地下水位が上昇した時には常に水中ポンプ４を作動させているので電気料金がかかる、水中ポンプ４の故障に備えて予備の水中ポンプを用意しておく必要がある等設置コスト、ランニングコストがかかる、また常にポンプが作動しているので故障が発生し安く保守が大変である。However, since this method always activates the submersible pump 4 when the groundwater level rises, it costs electricity, and it is necessary to prepare a spare submersible pump in preparation for the failure of the submersible pump 4, Running costs are high, and the pump is always in operation, so failure occurs and maintenance is difficult.

発明が解決しようとする課題Problems to be solved by the invention

本発明は従来の技術１で述べた地下水位が浅い地域では大雨、雪解け時期に地下水位が上昇して容易に流入管より水位が高くなり流入管をふさぎ、排水の逆流などを起こし流入管上流の施設が使用不能に成る問題点。  According to the present invention, in the area where the groundwater level is shallow as described in the prior art 1, the groundwater level rises at the time of the heavy rain and the snow melts, and the water level easily rises and closes the inflow pipe. The problem that the facility of the facility becomes unusable.

及び従来の技術２で述べた電気料金がかかる、水中ポンプの故障に備えて予備の水中ポンプを用意しておく必要がある等の設置コスト、ランニングコストがかかる、また常に水中ポンプが作動しているので故障が発生し安く保守が大変である等の問題点を解決しようとするものである。In addition, the installation costs and running costs such as the necessity of preparing a spare submersible pump in preparation for failure of the submersible pump are required, and the submersible pump always operates. Therefore, it is intended to solve problems such as failure and cheap maintenance.

課題を解決するための手段Means for solving the problem

浸透桝内に密閉された円筒もしくは角筒状のポンプ槽を配置し下り勾配を付けた流入管を接続する。
ポンプ槽に流入管より少し下の位置に浮き式の逆流防止弁付きの排出管を設ける。ポンプ槽内に水中ポンプを設置し排出口に圧送管を接続して出口を側溝等に開放する。
水中ポンプに水位の下限と上限を検知する下限センサーと上限センサーを設け、下限の位置はポンプ槽の底近く上限の位置は流出管の水位より高く流入管の水位より低い位置に設定する。
センサーが下限を検知すると水中ポンプを停止し上限を検知するとポンプを作動する。
水中ポンプの吸入口はセンサーの下限位置より低い位置から吸水する。A sealed cylindrical or square cylindrical pump tank is placed in the seepage trough, and an inflow pipe with a downward slope is connected.
The pump tank is provided with a floating discharge pipe with a check valve at a position slightly below the inflow pipe. Install a submersible pump in the pump tank, connect a pressure feed pipe to the discharge port, and open the outlet to a side groove.
The submersible pump is provided with a lower limit sensor and an upper limit sensor for detecting the lower limit and upper limit of the water level, and the lower limit position is set near the bottom of the pump tank and higher than the water level of the outflow pipe and lower than the water level of the inflow pipe.
When the sensor detects the lower limit, it stops the submersible pump, and when it detects the upper limit, it activates the pump.
The suction port of the submersible pump absorbs water from a position lower than the lower limit position of the sensor.

通常の汚水の流れを以下に記述する、流入管よりポンプ槽に流入した汚水は排出管の位置まで溜まって排出管から浸透桝内に排出され地中に浸透する、この段階ではポンプは作動していない。  The normal sewage flow is described below. The sewage that flows into the pump tank from the inflow pipe accumulates up to the position of the discharge pipe and is discharged from the discharge pipe into the seepage trough and penetrates into the ground. At this stage, the pump operates. Not.

地下水位が上昇した時の汚水の流れを以下に記述する、浸透桝内に上昇して来た地下水が排出管の位置より高くなると逆流防止弁が閉じて排出管が塞がれポンプ槽内に汚水が逆流しなくなる。
この時に流入管から流入した汚水はポンプ槽内に溜まっていく、そして流入管の位置近くまで汚水が溜まると上限センサーが働いて水中ポンプを作動し、ポンプ槽内の汚水は圧送管を通して側溝等に排出される、汚水が無くなると下限センサーが働いて水中ポンプを停止する、また汚水が溜まって上限センサーが働くと水中ポンプが作動し汚水を排出し汚水が無くなると下限センサーが働いて水中ポンプを停止する。
この繰り返しでポンプ槽内の汚水の水位を常に流入管より下に保つ、地下水位が下がると排出管の逆流防止弁が開いて浸透桝内に汚水が流れ地下浸透する。The flow of sewage when the groundwater level rises is described below. When the groundwater rising into the seepage trough becomes higher than the position of the discharge pipe, the backflow prevention valve is closed and the discharge pipe is closed and the pump tank is filled. Sewage will not flow back.
At this time, the sewage flowing from the inflow pipe accumulates in the pump tank, and when the sewage accumulates near the position of the inflow pipe, the upper limit sensor works to operate the submersible pump. When the sewage is discharged, the lower limit sensor works to stop the submersible pump, and when the sewage accumulates and the upper limit sensor works, the submersible pump operates to discharge the sewage, and when the sewage runs out, the lower limit sensor works. To stop.
By repeating this, the sewage level in the pump tank is always kept below the inflow pipe. When the groundwater level drops, the backflow prevention valve of the discharge pipe opens and the sewage flows into the seepage basin and penetrates underground.

以下、本発明の実施例を図面にもとづき説明する。  Embodiments of the present invention will be described below with reference to the drawings.

図１、図２において地表に埋設したコンクリート製の浸透桝１の内部に密閉された円筒もしくは角筒状のポンプ槽３を設け下り勾配を付けた流入管２を接続する、ポンプ槽３に流入管２より少し下の位置に浮き３３が着いた逆流防止弁３２付きの流出管３１を設ける。
ポンプ槽３内に水中ポンプ４を設置し排出口に圧送管を接続して出口を側溝等に開放する、水中ポンプ４の吸入口はセンサーの下限５１位置より低い位置にある。さらに水中ポンプ４には水位の下限と上限を検知する下限センサー４１と上限センサー４２を設けてある、下限５１の位置はポンプ槽３の底近く上限５２の位置は流出管３１の水位より高く流入管２の水位より低い位置に設定する。In FIG. 1 and FIG. 2, a sealed cylindrical or square cylindrical pump tank 3 is provided inside a concrete seepage rod 1 buried on the ground surface, and an inflow pipe 2 having a downward slope is connected to the pump tank 3. An outflow pipe 31 with a backflow prevention valve 32 having a float 33 attached at a position slightly below the pipe 2 is provided.
The submersible pump 4 is installed in the pump tank 3, a pressure feed pipe is connected to the discharge port, and the outlet is opened to a side groove or the like. Further, the submersible pump 4 is provided with a lower limit sensor 41 and an upper limit sensor 42 for detecting the lower limit and upper limit of the water level. The position of the lower limit 51 is near the bottom of the pump tank 3 and the position of the upper limit 52 is higher than the water level of the outflow pipe 31. Set to a position lower than the water level of tube 2.

通常の汚水の流れを以下に記述する、流入管２よりポンプ槽３に流入した汚水は排出管３１の位置まで溜まって排出管３１を通って浸透桝１内に排出され地中に浸透する、この段階では水中ポンプ４は作動していない。The flow of normal sewage is described below. The sewage that has flowed into the pump tank 3 from the inflow pipe 2 is accumulated up to the position of the discharge pipe 31 and is discharged into the infiltration basin 1 through the discharge pipe 31 and penetrates into the ground. At this stage, the submersible pump 4 is not operating.

地下水位が上昇した時の汚水の流れを以下に記述する、浸透桝１内に上昇して来た地下水１１２が排出管３１の位置より高くなると浮き３３の浮力によって逆流防止弁３２が閉じて排出管３１が塞がれポンプ槽３内に汚水が逆流しなくなる。The flow of sewage when the groundwater level rises is described below. When the groundwater 112 rising into the seepage trough 1 becomes higher than the position of the discharge pipe 31, the backflow prevention valve 32 is closed and discharged by the buoyancy of the float 33. The pipe 31 is blocked and the sewage does not flow back into the pump tank 3.

この時に流入管２から流入した汚水はポンプ槽３内に溜まっていく、そして流入管２の位置５２近くまで汚水が溜まると上限センサー４２が働いて水中ポンプ４を作動しポンプ槽３内の汚水を圧送管４５を通して側溝７０等に排出する。
汚水が無くなると下限センサー４１が働いて水中ポンプ４を停止する、また汚水が溜まって上限センサー４２が働くと水中ポンプ４が作動し汚水を排出し汚水が無くなると下限センサー４１が働いて水中ポンプ４を停止する。At this time, the sewage flowing in from the inflow pipe 2 accumulates in the pump tank 3, and when the sewage accumulates near the position 52 of the inflow pipe 2, the upper limit sensor 42 operates to operate the submersible pump 4 and the sewage in the pump tank 3. Is discharged to the side groove 70 and the like through the pressure feeding tube 45.
When the sewage runs out, the lower limit sensor 41 works to stop the submersible pump 4, and when the sewage accumulates and the upper limit sensor 42 works, the submersible pump 4 operates to discharge the sewage and when the sewage runs out, the lower limit sensor 41 works to work the submersible pump. 4 is stopped.

以上の様に水中ポンプ４の作動、停止を繰り返してポンプ槽３内の汚水の水位を常に流入管２より下にして流入管２からの汚水の流入に支障の無いようにして、流入管２上流の施設が使用不能に成らない様にしている。
水中ポンプ４はポンプ槽３内の汚水のみを排出するので作動時間は短くて済む。As described above, the operation and stop of the submersible pump 4 are repeated so that the level of the sewage in the pump tank 3 is always lower than the inflow pipe 2 so that the inflow of sewage from the inflow pipe 2 is not hindered. We make sure that the upstream facilities do not become unusable.
Since the submersible pump 4 discharges only the sewage in the pump tank 3, the operation time is short.

地下水位が下がって通常の状態に水位が戻った時は逆流防止弁３２が開いて汚水は排出管３１を通って浸透桝１内に排出され地中に浸透する。When the groundwater level drops and the water level returns to the normal state, the backflow prevention valve 32 opens and the sewage passes through the discharge pipe 31 and is discharged into the seepage trough 1 and penetrates into the ground.

図３において、実施例１の水中ポンプ４部分をポンプ槽３内から地上に設置して更に保守を容易にする様にした実施例２である。  In FIG. 3, the submersible pump 4 portion of the first embodiment is installed on the ground from the inside of the pump tank 3 to further facilitate maintenance.

浸透桝１、流入管２、ポンプ槽３、浮き３３、逆流防止弁３２、排出管３１の構成は実施例１と同じである。
以下、実施例１と異なる点はポンプ槽３内に汚水の水位の下限と上限を検知するセンサー４０を設けて下限の位置４０ａと上限の位置４０ｂを設定している。The configurations of the seepage trough 1, the inflow pipe 2, the pump tank 3, the float 33, the backflow prevention valve 32, and the discharge pipe 31 are the same as those in the first embodiment.
The difference from the first embodiment is that a sensor 40 for detecting the lower limit and the upper limit of the sewage water level is provided in the pump tank 3 to set the lower limit position 40a and the upper limit position 40b.

ポンプ槽３の底付近にポンプ６１の吸入口に接続した吸入管６４を接続している。ポンプユニット６０はポンプ６１、モーター６２、制御盤６３から構成され、地上の小屋等に設置する。
ポンプ６１の吸入口には吸入管６４、排出口には圧送管６５がそれぞれ接続して吸入管６４はポンプ槽３に、圧送管６５は側溝７０等に開放している。A suction pipe 64 connected to the suction port of the pump 61 is connected near the bottom of the pump tank 3. The pump unit 60 includes a pump 61, a motor 62, and a control panel 63, and is installed in a shed or the like on the ground.
A suction pipe 64 is connected to the suction port of the pump 61, and a pressure feed pipe 65 is connected to the discharge port. The suction pipe 64 is open to the pump tank 3, and the pressure feed pipe 65 is open to the side groove 70.

通常の地下水位の時の汚水の流れは実施例１と同じである。
地下水位１１２が上昇した時に逆流防止弁３２が閉じ排出管３１を塞ぎ汚水がポンプ槽３内に逆流するのを防ぐのは実施例１と同じである。
その後ポンプ槽３内に汚水が流入して来てセンサー４０が上限の位置４０ｂに達すると制御盤６３の制御によりモーター６２が回転してポンプ６１を作動してポンプ槽３内から汚水を汲み上げ側溝７０等に排出する。
ポンプ槽３内の汚水が減少してセンサー４０が下限の位置４０ａに達すると制御盤６３の制御によりモーター６２が止まり汚水の排出を停止する。The flow of sewage at the normal groundwater level is the same as in Example 1.
The backflow prevention valve 32 closes when the groundwater level 112 rises and closes the discharge pipe 31 to prevent the sewage from flowing back into the pump tank 3 as in the first embodiment.
Thereafter, when the sewage flows into the pump tank 3 and the sensor 40 reaches the upper limit position 40b, the motor 62 is rotated by the control of the control panel 63 to operate the pump 61, and the sewage is pumped from the pump tank 3 to the side groove. To 70 mag.
When the sewage in the pump tank 3 decreases and the sensor 40 reaches the lower limit position 40a, the motor 62 is stopped by the control of the control panel 63 and the discharge of the sewage is stopped.

発明の効果The invention's effect

以上説明した様に、地表に埋設したコンクリート製の浸透桝１の内部に設置したポンプ槽３に流入管２より少し下の位置に逆流防止弁３２付きの流出管３１を設ける事で地下水位が上昇した時のポンプ槽３内への汚水の逆流を防ぐ事が出来る。  As described above, the groundwater level can be reduced by providing the outflow pipe 31 with the backflow prevention valve 32 at a position slightly below the inflow pipe 2 in the pump tank 3 installed inside the concrete seepage trough 1 buried on the ground surface. The backflow of sewage into the pump tank 3 when it rises can be prevented.

その結果、水中ポンプ４はポンプ槽３内の汚水のみを排出するので作動時間は短くて済み、従来の技術で述べた電気料金がかかる、水中ポンプの故障に備えて予備の水中ポンプを用意しておく必要がある等の設置コスト、ランニングコストがかかる、また常に水中ポンプが作動しているので故障が発生し安く保守が大変である等の問題点を解決するものである。As a result, since the submersible pump 4 discharges only the sewage in the pump tank 3, the operation time is short, and there is an electricity charge as described in the prior art. This solves problems such as installation costs and running costs that need to be kept, etc., and because the submersible pump is always in operation, failure occurs and maintenance is difficult.

又、実施例２はポンプユニット６０を地上に設置する事で更に保守を容易にした。In the second embodiment, the maintenance is further facilitated by installing the pump unit 60 on the ground.

流出管３１に逆流防止弁３２が付いてないとポンプ槽３内へ汚水が次々と逆流して地下水位が下がるまで水中ポンプ４は作動し続ける。If the backflow prevention valve 32 is not attached to the outflow pipe 31, the submersible pump 4 continues to operate until the sewage flows back into the pump tank 3 one after another and the groundwater level drops.

本発明の実施例１を設置した通常水位の状態を示す断面図である。It is sectional drawing which shows the state of the normal water level which installed Example 1 of this invention. 図１の地下水位が上昇した状態を示す断面図である。It is sectional drawing which shows the state which the groundwater level of FIG. 1 raised. 本発明の実施例２を設置した断面図及び配管図である。It is sectional drawing and piping figure which installed Example 2 of this invention. 従来技術１を示す断面図。Sectional drawing which shows the prior art 1. FIG. 従来技術２を示す断面図。Sectional drawing which shows the prior art 2. FIG.

符号の説明Explanation of symbols

１・・・・浸透桝 ２・・・・流入管
３・・・・ポンプ槽 ３１・・・流出管
３２・・・逆流防止弁 ３３・・・浮き
４・・・・水中ポンプ ４１・・・下限センサー
４２・・・上限センサー ６０・・・ポンプユニット
６１・・・ポンプ ６２・・・モーター
６３・・・制御盤DESCRIPTION OF SYMBOLS 1 ... Permeation tank 2 ... Inflow pipe 3 ... Pump tank 31 ... Outflow pipe 32 ... Backflow prevention valve 33 ... Floating 4 ... Submersible pump 41 ... Lower limit sensor 42 ... Upper limit sensor 60 ... Pump unit 61 ... Pump 62 ... Motor 63 ... Control panel

Claims (2)

浸透桝内に密閉された円筒もしくは角筒状のポンプ槽を配置し下り勾配を付けた流入管を接続し流入管より少し下の位置に排出管を設ける。
ポンプ槽内に水中ポンプを設置し排出口に圧送管を接続して出口を側溝等に開放する。
水中ポンプに水位の下限と上限を検知する下限センサーと上限センサーを設け、下限の位置はポンプ槽の底近く上限の位置は流出管の水位より高く流入管の水位より低い位置に設定する。
以上の様に構成された浸透桝等における排水装置において排出管に逆流防止弁を設けた事を特徴とする浸透桝等における排水装置。A sealed cylindrical or square cylindrical pump tank is placed in the seepage tub, and an inflow pipe with a downward slope is connected, and a discharge pipe is provided at a position slightly below the inflow pipe.
Install a submersible pump in the pump tank, connect a pressure feed pipe to the discharge port, and open the outlet to a side groove.
The submersible pump is provided with a lower limit sensor and an upper limit sensor for detecting the lower limit and upper limit of the water level, and the lower limit position is set near the bottom of the pump tank and higher than the water level of the outflow pipe and lower than the water level of the inflow pipe.
A drainage device for an osmosis tub or the like, characterized in that a backflow prevention valve is provided in the discharge pipe in the drainage device for an osmosis tub or the like configured as described above. 請求項１において水中ポンプをポンプユニットとして地上に設置し、ポンプ槽には水位の下限と上限を検知するセンサーを設け、更に吸入管を接続した事を特徴とする浸透桝等における排水装置。2. A drainage device for an infiltration basin or the like according to claim 1, wherein the submersible pump is installed on the ground as a pump unit, the pump tank is provided with a sensor for detecting a lower limit and an upper limit of the water level, and a suction pipe is further connected.
JP2003400675A 2003-10-24 2003-10-24 Draining device in rainwater infiltration basin Pending JP2005127119A (en)

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JP2014025235A (en) * 2012-07-25 2014-02-06 Aron Kasei Co Ltd Septic tank drainage treatment system
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014025235A (en) * 2012-07-25 2014-02-06 Aron Kasei Co Ltd Septic tank drainage treatment system
CN102797371A (en) * 2012-08-17 2012-11-28 上海市城市建设设计研究总院 Multifunctional water outlet pump room with high level well
CN105297880A (en) * 2015-10-16 2016-02-03 陆建衡 Underground multi-layer rainwater water storage-drainage structure
CN107060036A (en) * 2017-04-05 2017-08-18 上海勘测设计研究院有限公司 A kind of drainage system and its control method for being used to discharge rainwater and sewage
JP2022129132A (en) * 2021-02-24 2022-09-05 藤林コンクリート工業株式会社 Catchment basin water quantity adjustment structure and catchment basin
JP7227638B2 (en) 2021-02-24 2023-02-22 藤林コンクリート工業株式会社 catch basin
JP2023042603A (en) * 2021-02-24 2023-03-27 藤林コンクリート工業株式会社 Water amount adjusting block for catch basin
JP7336164B2 (en) 2021-02-24 2023-08-31 藤林コンクリート工業株式会社 Water volume adjustment block for catch basin
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