JP4158057B2

JP4158057B2 - Overflow equipment in circular sedimentation basins

Info

Publication number: JP4158057B2
Application number: JP06382098A
Authority: JP
Inventors: 充弘藤原
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-02-05
Filing date: 1998-02-05
Publication date: 2008-10-01
Anticipated expiration: 2018-02-05
Also published as: JPH11221404A

Description

【０００１】
【発明の属する技術分野】
この発明は、円形沈澱池や方形沈澱池等の沈澱池の水面付近から清澄水を誘引・導出するための越流装置に関する。
【０００２】
【従来の技術】
例えば、円形沈澱池においては、池内周に添って樋状の越流堰が構成され、その更に内周側に離間したところにバッフルを備えて水面上のスカムを除きながら清澄水のみを排除するようにしている。
【０００３】
【発明が解決しようとする課題】
ところで、これまでの越流堰は池内周に一体に形成され、これとは別に前記バッフルが設けられていたため、越流堰とバッフルとで内外二重構造になり、そのため、池内周にスカム除去装置を構成する場合に施工が複雑化する問題があった。
【０００４】
この発明は前記課題を解決するためになされたもので、池内周の構造が簡略化し、スカム除去装置の施工も簡易化するようにした円形等の沈澱池における越流装置を提供することを目的とする。
【０００５】
【課題を解決するための手段】
前記課題を解決するため、請求項１記載の発明は、池中央側である内周側がバッフルに相当する面とされ池内周側である外周側から清澄水を流入可能とされた四角樋状の越流堰本体が円形等の沈澱池の内周に対し一定隙間を置いて添う状態で設けられるとともに、同越流堰本体の内周側には、水面よりも低く越流堰本体の内周に沿うべく上からみて弓状をなす底面をもつトラフと同トラフの池内周側に設けられ沈澱池内で回転運動するスカムスクレーパにより弾性変形して水面を境に上下することにより水面上のスカムを呑込可能とした堰とでなるスカム除去装置が装備され、同スカム除去装置のトラフと沈澱池外部との間がスカム除去管でまた前記越流堰本体と沈澱池外部との間が排水管でそれぞれ連通状とされるとともに、これらスカム除去管および排水管はそれぞれ可撓部分を備えてなる越流装置において、前記越流堰本体は、池周方向の複数個所に配備された受板により支持されているとともに、同受板は、沈澱池の周壁上面に固定され池内へ向けて伸びた池上板と、同池上板に通されてその上端に装備されるハンドルによる回転操作により昇降自在とされるとともにその軸部が池内周に縦軸向きに沿って伸びて下端が前記受板に連結された軸とによる調節機構により高さ変更可能に構成されていることを特徴とする。
【０００６】
【実施形態】
以下、この発明を好適な実施形態を参照しながら詳細に説明する。
【０００７】
図１から図３は、この発明の一実施形態を示し、比較的小型の円形沈澱池についてのもので、１は沈澱池の周壁、２は底壁、３はピットを示している。
【０００８】
この円形沈澱池は、上部に支持梁５を備え、同支持梁５の中央に駆動源６を設置している。
【０００９】
駆動源６により縦軸状の回転軸７が駆動されるとともにレーキ８が回転駆動される。
【００１０】
回転軸７の上部ではセンターウエル９が回転駆動されるとともにスカムスクレーパ１０も回転される。
【００１１】
尚、センターウエル９には穴が形成されて、スカムスクレーパ１０が貫通しているとともにスカムスクレーパ１０のセンターウエル９内の前面に添って外径方向に掻き寄せられるスカムを通過する穴も同時に形成されている。
【００１２】
円形沈澱池の内周には、断面が四角な樋状に形成された越流堰本体１２が全周に及ぶようにして設けられている。この越流堰本体１２は、ステンレス、銅、あるいはプラスチックなどにより作製され、周方向に２分割（あるいは３分割や４分割でもよい）式でフランジ１３の個所で止着具で現場結合可能になっている。結合により１つのリング状になる。そして、同リングになった越流堰本体１２は、池周方向の複数個所に水平に配備された受板１４…により支持される。１８は池上板で、池上面に水平に固定され池内に伸びるようにして池上面に固定され、同板１８には固定ナット１９が固着されているとともに、このナット１９には、軸１６が通されている。この軸１６は、固定ナット１９を介して池上板１８に回転により昇降自在とされ、その昇降は、池上からハンドル１５で回転操作によりなされるようになっている。軸１６の下端には受板１４に対して回転する可動ナット２０が設けられ、ハンドル１５を回転することにより、軸１６が回転して受板１４が昇降し越流堰本体１２が昇降調節されるようになっている。
【００１３】
越流堰本体１２の内周側の面は従来からのバッフルに代わるものである。そして、越流堰本体１２の外周側の面は池の周壁１からＳだけ少し離間しており、この間隔Ｓを通じて清澄水が上昇するとともに、図３に示す越流堰部２１を越えて清澄水が本体１２内に流入するようになっている。
【００１４】
また、越流堰本体１２の内周一部には、ゴムやプラスチックによりトラフ２３が上からみて弓状をなして装備されている。トラフ２３は堰２４を備え、同堰２４は図２の矢印のように弾性変形により内倒れし復帰も可能になっている。内倒れの運動は、前記スカムスクレーパ１０の先端に備えたローラー２５，２６によりなされる。この場合のローラー２５，２６は、図１に平面を示すように、周方向の前後の１対で構成され、すなわち、先行するローラー２５で堰２４を倒してゆきその後で後行のローラー２６で次の段階を倒してゆくことで、両ローラー２５，２６間の倒れた個所を介して掻き寄せられたスカムを流入させるようにする。
【００１５】
尚、図４に示すように、越流堰部２１を波形に形成してもよい。また、図５に示すように、堰２４はへの字状に形成しその下部を押し込むことで堰２４が大きく上下するように構成してもよい。また、越流堰本体１２は、その全体が弾性変形自在な材質である必要はなく、スカムを流入させるための部分のみが弾性変形自在なものになっていてもよい。さらに、図６に示すように、清澄水の流入量が多い場合は、越流堰本体１２の内外から流入させるようにしてもよい。図２、図６の２７は排水管系、２８はスカム除去管系を示し。共に可撓部分を備える。
【００１６】
図７は他の実施形態を示す。この実施形態のスカム除去装置のトラフ３０は池の全周にわたるものになっている。そして前後のローラー２５，２６により押さえ付けられながらスカムを流入させる。清澄水の呑み込みは、図２の方式でも図６の方式でもよい。
【００１７】
【発明の効果】
この発明は以上のようであるので、池内周の構造が簡略化し、スカム除去装置の施工も簡易化するようにした円形等の沈澱池における越流装置を提供することができる。
【図面の簡単な説明】
【図１】この発明の一実施形態を示す沈澱池の平面図。
【図２】図１のＩＩ−ＩＩ線断面図。
【図３】越流堰部の正面図。
【図４】越流堰部の他の実施形態を示す正面図。
【図５】堰の他の実施形態を示す断面図。
【図６】他の実施形態を示す断面図。
【図７】越流装置の他の実施形態を示す平面図。
【符号の説明】
１…周壁１０…スカムスクレーパ１２，３０…越流堰本体２３…トラフ２４…堰２５，２６…ローラー。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an overflow apparatus for attracting and deriving clear water from the vicinity of the surface of a sedimentation basin such as a circular sedimentation basin or a rectangular sedimentation basin.
[0002]
[Prior art]
For example, in a circular sedimentation basin, a bowl-shaped overflow weir is constructed along the inner circumference of the pond, and a baffle is provided at a position further away from the inner circumference to eliminate only clear water while removing scum on the water surface. I am doing so.
[0003]
[Problems to be solved by the invention]
By the way, the conventional overflow weir was integrally formed on the inner periphery of the pond, and the baffle was provided separately from this, so the overflow weir and the baffle had a double structure inside and outside, so scum was removed on the inner periphery of the pond. There is a problem that the construction becomes complicated when the apparatus is configured.
[0004]
The present invention has been made to solve the above-mentioned problems, and an object thereof is to provide an overflow device in a circular sedimentation basin in which the structure of the inner periphery of the pond is simplified and the construction of the scum removing device is simplified. And
[0005]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the invention according to claim 1 is a quadrangular bowl-like shape in which the inner peripheral side which is the center side of the pond is a surface corresponding to the baffle and the clarified water can be introduced from the outer peripheral side which is the inner peripheral side of the pond. The overflow weir body is provided with a certain gap with respect to the inner circumference of the sedimentation basin, such as a circular shape, and the inner circumference side of the overflow weir body is lower than the water surface and the inner circumference of the overflow weir body The scum on the surface of the water is formed by elastic deformation by a scum scraper that is provided on the inner periphery of the pond of the trough having a bottom surface that has an arcuate shape as viewed from above and that moves in the settling pond and moves up and down with the water surface as a boundary. It is equipped with a scum removal device composed of a weir that can be inserted, a scum removal pipe between the trough of the scum removal device and the outside of the sedimentation basin, and a drainage pipe between the overflow dam body and the outside of the sedimentation basin These scums are communicated with each other. In the overflow device in which the leaving pipe and the drain pipe each have a flexible portion, the overflow dam body is supported by receiving plates disposed at a plurality of locations in the pond circumferential direction, and the receiving plate is A pond upper plate fixed to the upper surface of the peripheral wall of the settling pond and extending toward the inside of the pond, and can be raised and lowered by a rotation operation by a handle that is passed through the pond upper plate and is installed at the upper end of the pond, and its shaft portion is vertically extended to the inner periphery of the pond. It is characterized in that the height can be changed by an adjustment mechanism that extends along the axial direction and has a lower end connected to the shaft connected to the receiving plate.
[0006]
Embodiment
Hereinafter, the present invention will be described in detail with reference to preferred embodiments .
[0007]
1 to 3 show an embodiment of the present invention, which is for a relatively small circular sedimentation basin, where 1 is a peripheral wall of the sedimentation basin, 2 is a bottom wall, and 3 is a pit.
[0008]
This circular sedimentation basin has a support beam 5 at the top, and a drive source 6 is installed at the center of the support beam 5.
[0009]
The drive source 6 drives the vertical rotation shaft 7 and the rake 8 is driven to rotate .
[0010]
In the upper part of the rotating shaft 7, the center well 9 is driven to rotate and the scum scraper 10 is also rotated .
[0011]
In addition, a hole is formed in the center well 9, and a scum scraper 10 passes therethrough and a hole that passes through the scum scraped in the outer diameter direction along the front surface in the center well 9 of the scum scraper 10 is formed at the same time. Has been .
[0012]
On the inner circumference of the circular sedimentation basin, an overflow weir body 12 having a square cross section is provided so as to extend over the entire circumference. The overflow weir body 12 is made of stainless steel, copper, plastic, or the like, and can be joined in-situ with a fastening device at the flange 13 in a circumferentially divided manner (or divided into three or four portions). ing. It becomes one ring shape by the combination. And the overflow dam main body 12 used as the ring is supported by the receiving plate 14 arrange | positioned horizontally in the several places of a pond circumferential direction. Reference numeral 18 denotes a pond top plate which is fixed horizontally to the pond top surface and is fixed to the pond top surface so as to extend into the pond. A fixing nut 19 is fixed to the plate 18, and a shaft 16 is passed through the nut 19. Has been. The shaft 16 can be moved up and down by rotation to the pond top plate 18 via a fixing nut 19, and the levitation can be performed by rotating the handle 15 from the top of the pond. A movable nut 20 that rotates with respect to the receiving plate 14 is provided at the lower end of the shaft 16. By rotating the handle 15, the shaft 16 rotates and the receiving plate 14 moves up and down, and the overflow weir body 12 is adjusted up and down. It has come to be .
[0013]
The surface on the inner peripheral side of the overflow weir body 12 replaces the conventional baffle. And the surface on the outer peripheral side of the overflow weir body 12 is slightly separated from the peripheral wall 1 of the pond by S, and the clarified water rises through this interval S, and also exceeds the overflow dam part 21 shown in FIG. Water flows into the main body 12.
[0014]
In addition, a trough 23 is mounted on a part of the inner periphery of the overflow weir body 12 in a bow shape as viewed from above by rubber or plastic. The trough 23 is provided with a weir 24, and the weir 24 falls inward by elastic deformation as shown by an arrow in FIG. The inward movement is performed by rollers 25 and 26 provided at the tip of the scum scraper 10. The rollers 25 and 26 in this case are composed of a pair of front and rear in the circumferential direction as shown in FIG. 1, that is, the weir 24 is defeated by the preceding roller 25 and then the succeeding roller 26. By defeating the next stage, the scum scraped through the fallen portion between the rollers 25 and 26 is caused to flow.
[0015]
In addition, as shown in FIG. 4, you may form the overflow dam part 21 in a waveform. Further, as shown in FIG. 5, the weir 24 may be formed in a U-shape, and the lower portion of the weir 24 may be pushed up and down so that the weir 24 moves up and down. Further, the overflow weir body 12 as a whole need not be made of an elastically deformable material, and only the portion for allowing the scum to flow in may be elastically deformable. Furthermore, as shown in FIG. 6, when there is much inflow of clarified water, you may make it flow in from the inside and outside of the overflow weir main body 12. FIG. 2 and 6, 27 is a drain pipe system, and 28 is a scum removal pipe system. Both have flexible portions.
[0016]
FIG. 7 shows another embodiment. The trough 30 of this embodiment of the scum removing device extends over the entire circumference of the pond. Then, the scum is caused to flow while being pressed by the front and rear rollers 25 and 26. The method of FIG. 2 or the method of FIG.
[0017]
【The invention's effect】
Since the present invention is as described above, it is possible to provide an overflow device in a circular sedimentation basin in which the structure of the inner periphery of the pond is simplified and the construction of the scum removing device is simplified.
[Brief description of the drawings]
FIG. 1 is a plan view of a sedimentation basin showing an embodiment of the present invention.
2 is a cross-sectional view taken along the line II-II in FIG.
FIG. 3 is a front view of an overflow weir part.
FIG. 4 is a front view showing another embodiment of the overflow weir part.
FIG. 5 is a cross-sectional view showing another embodiment of the weir.
FIG. 6 is a cross-sectional view showing another embodiment.
FIG. 7 is a plan view showing another embodiment of the overflow device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Perimeter wall 10 ... Scum scraper 12, 30 ... Overflow weir body 23 ... Trough 24 ... Weir 25, 26 ... Roller

Claims

The square basin-shaped overflow weir body that allows the clear water to flow in from the outer peripheral side that is the inner peripheral side of the pond and the inner peripheral side that is the central side of the pond is the circular inner surface of the sedimentation pond A trough that is provided with a certain gap, and has an arcuate bottom surface on the inner circumference side of the overflow weir body that is lower than the water surface and along the inner circumference of the overflow weir body. The trough is equipped with a scum removal device that is provided on the inner periphery of the pond and elastically deformed by a scum scraper that rotates in the sedimentation pond and moves up and down on the boundary of the water surface to allow the scum on the water surface to be caught. The scum removal device has a scum removal pipe between the trough and the outside of the sedimentation basin, and a drainage pipe between the overflow weir body and the outside of the sedimentation basin. Each tube has a flexible part. In the overflow apparatus, the overflow weir body is supported by receiving plates disposed at a plurality of locations in the pond circumferential direction, and the receiving plate is fixed to the upper surface of the peripheral wall of the settling pond and extends toward the pond. It can be moved up and down by a rotating operation with a pond upper plate and a handle that is passed through the pond upper plate and equipped at the upper end thereof, and its shaft portion extends along the vertical axis to the inner periphery of the pond, and the lower end is connected to the receiving plate. An overflow device for a sedimentation basin such as a circular shape, wherein the height can be changed by an adjustment mechanism using a shaft.