JPH0634875Y2 - Scum removal device in the inflow - Google Patents

Description

TECHNICAL FIELD The present invention relates to a scum removing device in an inflow culvert.

[Background technology]

It is very inconvenient because a large amount of scum accumulates in the inflow conduit before entering the sedimentation pond and flows into the next sedimentation pond. In this case, not only sludge but also scum on the water surface can be effectively eliminated if the chain drive type scraping device on the sedimentation pond side is a 4-axis type, but if it is a 3-axis type, flight on the water surface is possible. Since it does not pass, the scum cannot be effectively removed, and a large amount of scum accumulates on the water surface, which is inconvenient.

[Purpose of device]

According to the present invention, the scum before entering the sedimentation basin can be eliminated in advance by constructing the triaxial type scraping device in the inflow basin which is the previous stage when the sedimentation basin is provided in the sedimentation basin, and the removal is particularly effective. It is an object of the present invention to provide a scum removing device in an inflow conduit.

[Constitution of device]

In order to achieve the above-mentioned object, the present invention is directed to a porous straightening wall provided at one end of a sedimentation basin equipped with a triaxial support type chain driven scraping device and a device for removing scum on the water surface. The treated water introduced from the inflow pipe installed in the wall facing the same flow straightening wall is introduced into the sedimentation basin through the holes in the front straightening wall, and is circulated and driven. In the scum removing device, a chain-driven scraping conveyor having a plurality of scraping plates on the outer circumference of a chain that is circulated is surrounded by a surrounding area of a treated water discharge flow path that is discharged from the inflow pipe. The conveyor is arranged so as to face the water, and the conveyor is configured so that the scraping board moves to a height corresponding to approximately the middle between the water surface and the bottom surface of the sedimentation basin in the lower direction and moves to the water surface in the upper direction. With the flow Tube is arranged separately in the horizontal direction as much as possible the upper side of the raking the conveyer split into a plurality of,
In addition, a scum attracting means is provided at a water surface position facing the driving direction above the scraping conveyor.

〔Example〕

Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments.

1 to 3 show an example thereof. A triaxial (support) type chain 3 is provided in the sedimentation basin 2 so as to be circulatively drivable, and constitutes a sludge attracting device. On one side of the water surface of the sedimentation pond 2, a float 4 that floats and sinks.
There is a trough 5 on the rear side of this float 4.
Is provided. The float 4 is adapted to repeatedly perform floating / sinking operations by a floating / sinking means (not shown). This is configured as a scum removing device in the sedimentation basin.

Reference numeral 1 is an inflow conduit, which is formed at one end of the sedimentation pond 2. The inflow conduit 1 is formed by a straightening wall 6 that is porous and partitions the inside of the pond. The inflow culvert 1 is formed in a rectangular shape with its longitudinal direction oriented in the width direction of the settling basin 2 in a plan view. A water surface 7 is set on the inflow conduit 1, and a scum attracting device having the same structure as the scum removing device is provided at one longitudinal end of the inflow conduit 1. The device comprises a float 4 and a trough 5. A drive shaft 9 is horizontally provided on the front side of the float on the one end side so as to be slightly below the water surface 7, and the coaxial shaft 9 is in the same direction as the axial center of the inflow pipe 8. The drive shaft 9 has a pair of left and right drive sprockets 10.
Is installed. A drive shaft 9 is provided on the opposite side of the inflow conduit 1.
A driven shaft 11 is provided at the same height as the
A pair of driven sprockets 12 is provided.

Furthermore, below the inside of the inflow conduit 1, there are two idle shafts 30,3.
0 is provided. This idle shaft 30,30 is connected to the inflow pipe 8
It is arranged at a lower position so as to face each other in the longitudinal direction, and as shown in FIG. 2, it is provided at a distance closer to each other than between the shafts 9 and 11. Idle sprockets around these idle shafts 30,30 14,14
Is installed.

Then, two left and right drive chains (one of the constituent elements of the scraping conveyor) 13 are spanned via the sprockets 10, 12, 14, 14. On the outer periphery of the drive chain 13, a plurality of scraping plates 15 ... Are arranged so as to extend between the left and right chains and have a space in front and back.

The scraping plates 15 ... Are circulatively driven in an orbit that surrounds the derivation basin X of the treated water that is deducted from the inflow pipes 8.
In the downward direction, the water surface 7 and the bottom of the sedimentation basin are moved approximately at an intermediate height, and in the upward direction, the water surface 7 is moved in the opposite direction to the scum attracting device. A scum attracting device (float 4 and trough 5) is provided at a water surface position facing in the driving direction. The drive device for the chain 13 is not shown.

The inflow pipes 8 ... Through the wall facing the straightening wall 6
The exit faces inside. These inflow pipes 8 are divided into a plurality of pipes (six pipes), and the plurality of pipes are arranged in such a manner that the sewage becomes a slow flow and the inflow conduit 1
This is for preventing it from staying inside for a long time and immediately flowing into the sedimentation basin 2 through the holes of the flow regulating wall 6. The inflow pipe 8 is arranged as close to the upper side as possible in the scraping conveyor. This is because it is considered that the suspended matter in the sewage immediately floats up and does not easily reach the sedimentation pond 2.

When the drive chain 13 is driven and the scraping plate 15 moves upward in the direction of the float 4, scum floating on the water surface in the inflow conduit 1 is scraped toward the float 4, and the trough 5 passes through the sunken float 4. It is designed to attract inside.

A large amount of scum may also float in the lower area of the inflow culvert 1, but these are effectively caught and scraped by the creeper plate 15 that passes underneath, and brought up above.
It attracts into the trough 5 through the water surface 7.

In this way, the scraping conveyor arranged inside so as to surround the drainage basin of the sewage from the inflow pipe 8 has a scraping plate 15 at a height corresponding to approximately the middle between the water surface 7 and the bottom of the sedimentation tank 15 in the lower direction. Is moved to the upper side of the water surface 7
Is arranged so as to move, and the inflow pipe 8 is divided into a plurality of pieces and is horizontally arranged in the horizontal direction toward the upper side as much as possible in the scraping conveyor. Since the scum attracting means 4 and 5 are provided at the water surface positions facing each other in the driving direction, the sewage is led into the inflow 1 in a state of being dispersed as gently as possible, and the suspended matter immediately floats to the water surface. . Other floating substances floating in the wastewater do not reach the sedimentation pond immediately, and are set rather high not at the bottom level of the sedimentation pond, and are caught by the scraping board that circulates and is scooped up on the water surface, scum. Removed by attracting means. As a result, most of the scum is collected and removed in the inflow basin, so the scum collection and removal in the settling basin is reduced, and even if the settling basin has a triaxial type trapping device, Since the scum is efficiently removed, a large amount of scum can be collected and removed as a whole.

In addition, FIGS. 4 to 6 show additional proposal examples, and as shown in these drawings, one wire 16 or a rod or a chain is provided on the surface of the water in the sedimentation tank 2 and is reciprocated. In addition to being drivable, a mounting plate 17 is attached to the wire 16 at a constant interval. This mounting plate 17
While the scratching hole 18 and the avoiding hole 19 are formed,
A scraping bar 21 is supported on the mounting plate 17 via a rotary shaft 20.

A crawler plate 22 is attached to the lower end of the crawler bar 21, and a lock projection 23 is provided on the upper end of the crawler bar 21. The lock projection 23 is adapted to be fitted into the scratching hole 18 and the avoiding hole 19 alternately.

In the pond, stoppers 24 are placed on the water surface at regular intervals.
Has been deployed.

When the wire 16 moves in one direction, it is oriented vertically as shown in FIG. 5 and scrapes scum on the water surface. When the wire 16 moves by a certain amount, the scraping plate 22 hits the stopper 24, the lock protrusion 23 fits in the avoiding hole 19, and comes to float from the water surface.

At that point, the wire 16 will move in the opposite direction, at which time the scraper plate 22 will be avoiding above the surface of the water and will return without interfering with the scum. When the wire 16 returns by a certain amount, the scraping plate 22 hits the stopper 24 and assumes a vertical posture.

[Effect of device]

As described above, according to the present invention, the scum before entering the sedimentation basin can be eliminated in advance by configuring the three-axis type scraping device in the inflow basin which is the previous stage when the sedimentation basin is provided. Especially, the removal can be effectively performed.

As a result, most of the scum is collected and removed in the inflow basin, so scum collection and removal in the sedimentation basin is greatly reduced, and the sedimentation basin has a three-axis type scraping device as an existing device. However, since the scum removal in the previous stage is efficiently performed, a large amount of scum can be collected and removed in the early stage as a whole. Since early removal is possible, the accumulation of scum on the water surface in the sedimentation basin is greatly reduced, which causes problems such as a bad odor and a loss of aesthetics.

[Brief description of drawings]

1 is a side sectional view showing an embodiment of the present invention, FIG. 2 is an explanatory view showing an outline of the conveyor, FIG. 3 is a plan view of FIG. 1, and FIG. 4 is an additional example. FIG. 5 is an enlarged view of FIG. 5, and FIG. 6 is a fifth side view. 1 ... Inflow Drain, 2 ... Sedimentation Pond, 4 ... Float (one of scum attracting means), 5 ... Trough (one of scum attracting means), 6
... baffle wall, 7 ... water surface, 8 ... inflow pipe, 13 ... drive chain,
15 ... Scraping board, X ... Outflow basin of treated water.

Claims (1)

[Scope of utility model registration request] Claims: 1. A rectifier provided at the front stage of a porous rectifying wall provided at one end of a sedimentation basin, which comprises a chain drive type scraping device of a triaxial support type and a device for removing scum on the water surface. A scum removing device, which is installed in an inflow culvert and is driven to circulate, in which treated water introduced from an inflow pipe provided on a wall opposite to the wall is guided into the sedimentation basin through the holes of the straightening wall. , A chain drive type scraping conveyor equipped with a plurality of scraping plates on the outer circumference of the chain that is circulated and driven,
The conveyor is disposed inside so as to surround the treated water discharge basin that is discharged from the inflow pipe, and this conveyor has a scratching plate that moves below at a height corresponding to approximately the middle between the water surface and the bottom of the sedimentation basin. The suction plate is configured to move on the water surface above, and the inflow pipe is
It is divided into a plurality of types and is horizontally arranged in the scratching conveyor as close to the upper side as possible, and is provided with a scum attracting means at a water surface position facing the driving direction above the scratching conveyor. A scum removing device in an inflow channel.