JP4055195B2 - Treatment pond - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a treatment pond which is a circular or rectangular sedimentation pond .
[0002]
[Prior art]
For example, in a circular sedimentation basin, a sludge scraping device is configured such that the rake at the bottom of the pond can be driven around by a rotation shaft provided at the vertical axis in the center of the pond. On the other hand, on the surface of the water, the scraper can be circulated freely by the scraper arm, and the suspended matter scraped by the scraper is removed to the outside by the scum removing device. In such a sedimentation basin, the scum removing device stands by at a fixed position facing the scraper, and the scraper passes over the removing device .
[0003]
[Problems to be solved by the invention]
By the way, the scraper is suspended and supported so as to be rotatable around a horizontal turning shaft which is a scraper arm, and when it reaches the scum removing device, it avoids backward along a guide rail arranged on the scum removing device. It goes so far that when it crosses the guide rail, it will come back naturally. According to this method, since the portion on the inner diameter side of the scraper hits the guide rail first and rides up, the other portions are not actually on the guide rail, but are forcibly lifted and an unreasonable force is generated here Or caused local wear, causing problems. Further, when the outer diameter side of the scraper is still in front of the scum removing device, when it is lifted, the scum that has been scraped up to that point ends, and the scum scraping varies .
[0004]
This invention was made in order to solve the said subject, and it aims at providing the treatment pond which can accelerate | stimulate a sedimentation action, buffering the sewage always introduce | transduced, even if there is a fluctuation | variation of a water level. .
[0005]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the invention according to claim 1 is characterized in that a walkway is passed over the treatment pond, which is a circular or square sedimentation pond, so as to pass through the center of the treatment pond. At the corresponding position, there is a drive unit and a rotating shaft that drives a rake that can rotate freely at the bottom of the pond. At the center of the treatment pond, the upper end protrudes from the water surface and the lower part is submerged below the water surface. A round cylinder-shaped center well is fixedly provided, and a sewage inflow pipe for introducing sewage from the outside into the center well is provided between the outer periphery of the treatment pond and the center well, and floats on the outer periphery of the center well. In the treatment pond configured so that the suspended matter is scraped by a rotating scraper and removed to the outside by a scum removing device, a disk-shaped float is formed on the water surface in the center well. Position tracking can be from sewage inflow pipe while being浮設, characterized in that so sewage flows upflow toward the float through sewage supply pipe.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments.
1 to 10 show a preferred embodiment of the present invention, where 1 is a treatment pond which is a circular sedimentation basin. The treatment pond 1 is formed with a drainage groove 3 on the inner side of the peripheral wall 2, an overflow weir 4 is provided on the inner side of the drainage groove 3, and a plurality of brackets 5 are provided on the inner side in the circumferential direction. A baffle 6 is provided. A center well 7 is fixedly provided in the center of the pond by a method described later.
[0007]
A walkway 9 is provided on the upper side of the treatment pond 1, and in the middle of the walkway 9 in the longitudinal direction, a first drive device (drive source with a speed reduction device) for driving a rotary shaft 10 provided in the center of the pond in a vertical axis shape. 11 is installed.
The rotary shaft 10 is supported by the bearing 13 in the pit 12 and the sludge deposited by rotating the rake 14 is dropped into the pit 12 and then extracted to the outside as indicated by the arrow in FIG.
[0008]
On the other hand, the center well 7 passes through the outer lateral side of the center well 7 and the sewage inflow fixed to the fixed beam 16 such as an H-type channel material or the like laid in the treatment pond 1 via the spacer 17. The tube 18 is fixedly supported. The sewage inflow pipe 18 is introduced into the center well 7 through the sewage supply pipe 19. In addition, the float 20 shown by the phantom line is levitated and installed in the center well 7, and the float 20 has a role of following the water level and buffering the sewage flowing from below to promote precipitation. The float 20 may be provided with a hemisphere, a cylinder, or a dent or projection such as a cylinder on the bottom surface to enhance the buffering effect.
[0009]
Reference numeral 22 denotes a scum remover, which is fixedly installed on the center well 7 of the treatment pond 1 with one end and the other end in front of the baffle 6. As shown in the cross section of FIG. 4, the apparatus 22 includes a bottom plate portion 23a having a strip shape, and a back plate portion 23b and a bottom plate portion 23a that rise from the rear end of the bottom plate portion 23a so as to be on the water surface 24. The trough 23 includes a front plate portion 23c that rises from the front end so as to be below the water surface 24. The trough 23 is closed at one end by a closing plate 25 and has a flange 26 at the other end.
[0010]
A scum box 27 is continuously provided via the flange 26, and a scum discharge pipe 28 is connected to the box 27. The trough 23 is fixed to the baffle 6 via brackets 30 provided before and after the scum box 27, and the other end is mounted on the fixed beam 16 and fixed.
[0011]
On the front surface of the trough 23, weirs 33 are provided at both ends via a weir shaft 32 so as to be able to swing back and forth. The weir 33 is prevented from entering water from the front by a front seal a, and a closing plate The side plates c, c slide on the side seals b fixed to the inner surfaces of the flange 25 and the flange 26, respectively, so that the entry of water from the side portions is prevented. The weir 33 includes a dog-shaped dam substrate 34 and a dam body 35 at the upper end thereof, and a reinforcing member 36 is provided on the inner surface.
[0012]
A lever 38 extending from the weir shaft 32 is provided on the inner end side of the trough 23, and a cam roller 39 is provided at the tip of the lever 38 so as to be freely rotatable. The lever 38 is pulled by a spring (adjustable spring pressure) 40 and stopped by a stopper 41. In this state, the weir 33 is vertical and is in a dammed state. Further, the weight 42 provided on the weir shaft 32 at the other end of the trough 23 urges the weir 33 to rotate forward.
[0013]
On the other hand, the scraper arm 45 is provided with a cam plate 46 as shown in FIGS. 1 and 2, and the roller 39 is kicked down by the cam plate 46 as shown in FIGS. Is rotated toward the inside of the trough so that the upper end is pushed down below the water surface as indicated by the phantom line in FIG. As a result, suspended matter on the water surface flows into the trough 23 together with some water. When the cam plate 46 passes over the roller 39, the weir 33 is returned to the original dammed state by the weight 42.
[0014]
The scraper arm 45 is a round pipe, and a base portion of the arm 45 includes a rotating ring 48, and the ring 48 is rotatable on the outer periphery of the rotating shaft 10 via a bearing 49. Reference numeral 50 denotes a rotary receiving disc. A longitudinal direction of the scraper arm 45 extends in an outer diameter direction, and a scraper 51 formed in a strip shape having a vertical slit in a soft plate made of resin or rubber is suspended below the arm 45. Since the scraper 51 has a strip shape, it can be freely deformed individually when it comes on the scum removing device 22.
[0015]
As shown in FIGS. 9 and 10, a mounting plate 53 with a rib is fixed to the lower end of the scraper arm 45, and a rolling element 55 is provided below the mounting plate 53 via a bracket 54. . The rolling element 55 is of a type having a built-in driving means composed of a small drive motor and a coronet speed reducer. The rolling element 55 has an outer ring made of urethane or the like, and is along the rolling surface 6 a on the baffle 6. It is free to roll.
As indicated by phantom lines in FIG. 10, auxiliary wheels 57 and 57 may be added by extending wheel receivers 57 from the mounting plate 53 (or bracket 54) to the front and rear or one of them. The auxiliary wheel 57 may be attached so that it can be bounced downward with a spring, rubber or the like and escape upward. Moreover, you may make it the auxiliary | assistant wheel 57 contact | win the lower surface of the upper L-shaped part of the baffle 6 besides what rolls on the rolling surface 6a. Furthermore, you may provide the side roller which hits the baffle 6 from the inside and outside (it may be one side). The drive motor may be an exterior type. The rolling element 55 may rotate concentrically on the outer periphery of the scraper arm 45.
[0016]
The scraper 51 goes around the scum removing device 22 in the same direction as it is. However, after the weir 33 is lowered from the surface of the water, the scraper 51 is lifted to return and rotate in the reverse direction. It may be. The scraper 51 is configured to rotate once while the rake 14 is rotated several times, or is configured to rotate at a speed that is a fraction of the rotational speed of the rake 14. The scraper 51 may operate intermittently while the rake 14 is continuously rotated.
[0017]
【The invention's effect】
Since the present invention is configured as described above, it is possible to provide a treatment pond that can promote the sedimentation action while buffering the sewage that is always introduced even if the water level fluctuates. .
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of a circular sedimentation basin according to an embodiment of the present invention.
FIG. 2 is a plan view of the embodiment of FIG.
3 is a front view of the scum removing device of FIG. 1. FIG.
FIG. 4 is a cross-sectional view of the scum removing device.
FIG. 5 is a side view of the scum removing device as seen from the center well side.
FIG. 6 is a side view of the scum removing device as seen from outside the pond.
FIG. 7 is a side view showing a relationship between a cam roller and a cam plate of the scum removing device.
FIG. 8 is a side view showing a state where the cam roller is kicked down by the cam plate.
FIG. 9 is an enlarged view of the rolling portion of FIG. 1;
10 is a side view of FIG. 9. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Processing pond 10 ... Rotating shaft 22 ... Scum removal apparatus 45 ... Scraper arm 51 ... Scraper.

Claims (1)

On the upper side of the treatment pond, which is a circular or square sedimentation pond, a walkway is passed through the center of the treatment pond, and at the position corresponding to the treatment pond center in the walkway is a rake that can be rotated at the bottom of the pond. The center of the treatment pond is provided with a round barrel shaped center well with the upper end protruding from the water surface and the lower part submerged below the water surface. A sewage inflow pipe for introducing sewage from the outside into the center well is installed between the outer periphery of the center well and the floating material floating on the outer periphery of the center well is scraped and removed by a rotating scraper. In the treatment pond configured to be excluded to the outside by the apparatus, a disk-shaped float is floated on the water surface in the center well so as to be able to follow the water level and from the sewage inflow pipe. Processing pond, characterized in that so sewage flows upflow toward the float through sewage supply pipe.

Images