JP2542012Y2 - Circular sedimentation pond - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a circular sedimentation basin.

[Conventional technology]

A rotary shaft, also called a center shaft, is provided at the center of the circular sedimentation basin. A rotary arm is attached to the outer periphery of the coaxial shaft, and the rake provided at the lower end of the coaxial shaft is rotated. The rotating arm is provided with a scraper, and guides the scum floating on the water surface to the outside and removes it to the discharge trough,
The rake sediments sludge contained in sewage supplied from outside the pond and discharges the sludge outside the pond.

[Problems to be solved by the invention]

By the way, the rotating shaft has conventionally been positively rotated by the motor at the upper end, so that there is a problem in that the power consumption is large.

The present invention has been made to solve such a problem, and an object thereof is to reduce power consumption.

[Means for solving the problem]

In order to solve the above-mentioned problem, this invention is configured such that sewage is supplied, sludge in the sewage is settled and discharged out of the pond, and a rotating shaft is provided at the center of the pond. In a circular sedimentation pond in which the scum floating on the water surface is removed by using this rotation, a gutter-like shape is formed around the pond, which gradually decreases in the circumferential direction and connects to the original high place at the lowest point. In the circumferential groove, the sewage is guided to make a round and is introduced into the pond from the low place at an increased flow rate, and is provided around the outer periphery of the rotary shaft. Is characterized in that a blade provided with rotation by sewage from the circumferential groove is provided.

〔Example〕

Hereinafter, the present invention will be described with reference to the illustrated embodiment.

1 to 3 show an embodiment of the present invention. In this circular sedimentation basin, 1 is a peripheral wall, 2 is a conical bottom wall, and 3 is a water surface.

A support 4 is passed above the pond so as to pass through the center, and a motor 6 with a speed reducer 5 is fixed to the support 4. The rotating shaft 7 is rotated by a motor 6, and the rotation causes the lower rake 8 to rotate.

A rotating cylinder that rotates with the coaxial 7 on the upper part of the rotating shaft 7
10 are installed. The rotary cylinder 10 has a cylindrical shape and has an upper end closed and a lower end opened. A rotating trough 11 is attached to the outer periphery of the cylinder 10 at its base so as to extend in the outer diameter direction. As shown in FIG. 3, the rotary trough 11 has a J-shaped cross section having a lower front portion and a higher rear portion, and is adapted to travel horizontally in a lower front direction. The front part is slightly lower than the water surface 3, and a movable weir 12 is provided in front of the water surface 3 so as to follow the water surface 3 and to be always at a position lower than the water surface 3 by a certain amount. When the rotary trough 11 rotates, scum is guided over the movable weir 12. A plurality of notches 13 are provided at the front of the rotary trough 11 so that large scum can easily flow in. The movable weir 12 is guided up and down by guides 14 fixed to the front surface of the rotary trough 11.

The scum guided into the rotating cylinder 10 falls and is guided into the fixed cylinder 15 provided on the outer periphery of the rotating shaft 7. The scum guided to the fixed cylinder 15 is discharged out of the pond through a scum discharge cylinder 16 extending from the outer periphery in the outer diameter direction.

In addition, an overflow weir 17 is provided on the inner periphery of the pond so that clear supernatant water is always discharged outside the pond.

By the way, sewage is designed to flow into the pond, but here, instead of simply flowing the sewage,
It is devised to use the rotational force of the rotating shaft 7. That is, the sewage from the inflow pipe 20 is guided into the circumferential groove 21 provided along the inner periphery of the pond, and the one that has fallen there is applied to the blade 23 through the guide pipe 22 and converted into rotational force. Like that. The circumferential groove 21 is highest at the inflow pipe 20 and gradually lowers there. The lowest point of the inflow pipe 20 is a foot 24 that is slightly widened in the outer diameter direction, from which waste water flows into the guide pipe 22. Feather 23
It is fixed to the rotating shaft 7 so that a rotating force is generated by the force of the sewage flowing down and is converted into a rotating force. In addition,
A rotating plate 26 is fixed to the upper outer periphery of the rotating shaft 7,
A spring plate 28 is attached to the plate 26 via a hinge 27. At the end of the spring plate 28, a scraping plate 29 of about half the width of the circumferential groove 21 is attached. This scraper 29
Promotes advancing along the groove 21 and circulating the wastewater while allowing the wastewater in the circumferential groove 21 to escape to some extent. Same scraping plate
29 is adapted to respond to height fluctuations by the vertical movement of the spring plate 28. In particular, this is also the case of the sliding motion that returns from the lowest position to the highest position in the circumferential groove 21.

In addition, as shown in FIG. 4, the scraping plate 29 is composed of two plates that are urged by a spring so as to always return inward. This allows the brake to work. The brake may be such as to brake the rotating shaft 7.

FIG. 5 shows an additional embodiment. In this embodiment, the rotational force of a circular sedimentation basin is converted by using the flow from an overflow weir, the flow in a water channel, or the discharge of a river to save labor. That is, 30 is an outlet, 31 is a blade, 32 is a hydraulic pump, 33 is a check valve, 34 is an accumulator, 35 is a variable throttle, 36
Indicates a motor, 37 indicates a circular sedimentation basin, and 38 indicates a tank. The blade 31 is rotated by the flow force of the water from the outlet 30, whereby the hydraulic pump 32 is operated.
The oil from the hydraulic pump 32 is accumulated in an accumulator 34 and converted into rotational force by a motor 36. In the middle of the oil passage, there is provided a radiator 39 for releasing heat generated by the throttle 35.
By embedding it under the road, the heat radiation may be used for melting snow. In the above-described embodiment, the motor 36 for the circular sedimentation basin is rotated. However, the motor 36 for driving the motor 41 for the rectangular triaxial sedimentation basin 40 may be used.
May be used to drive the. The use of the flow in the water channel is shown in FIG. That is,
The blades 46, 46 may be arranged in the water channel 45, and the hydraulic pumps 47, 47 may be rotated by the blades 46, 46.

[Effect of the invention]

As described above, according to the present invention, the power consumption is reduced.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a longitudinal sectional view showing an embodiment of the present invention, FIG. 2 is a plan view thereof, FIG. 3 is a sectional view taken along line III-III of FIG.
FIG. 5 is a plan view showing a scraping plate with a brake function, FIG. 5 is an explanatory view showing an additional embodiment, and FIG. 6 is a plan view showing a water channel utilization system. 7: rotating shaft, 21: circumferential groove, 23: blade.

Claims (1)

(57) [Scope of request for utility model registration] (1) Sewage is supplied, sludge in the sewage is settled and discharged out of the pond, and a rotation shaft is provided at the center of the pond. In a circular sedimentation basin in which scum floating on the water surface is eliminated, a gutter-shaped circumferential groove is provided around the pond, which is gradually lowered in the circumferential direction and connected to the original high place at the lowest point. In the same circumferential groove, the sewage is guided to make one round and is introduced into the pond from the low place at an increased flow rate, and on the outer periphery of the rotating shaft, A circular sedimentation basin characterized by being provided with blades that are given rotation by sewage.