JP2000000001U - Scum scraping device - Google Patents

Abstract

(57) [Summary] [Purpose] A simple and inexpensive scum scraping device that actively scrapes scum on the water surface and removes it outside the pond through a scum removal device to promote water purification. To provide. [Constitution] A scum removal device 40 is provided between sewage treatment facilities such as a rectangular sedimentation basin and a sand basin between opposing side walls 2 and 2.
The scum removing device 40 is provided with damming means 46 which goes up and down at the boundary of the water surface 21, and elimination means 41 which attracts scum and water beyond the damming means 46 and removes them to the other.
A scum scraping device that scrapes scum on the water surface 21 toward the scum removing device 40 and removes the scum by the scum removing device 40. Guide 22 installed on one side only
Is supported so as to be able to reciprocate along the
Is characterized in that the scum of the water surface 21 is raked only when heading toward the scum removal device 40, and is in a non-scraping state when heading in the opposite direction to the scum removal device 40.

Description

[Detailed description of the invention]

[0001]

[Industrial applications]

 This invention relates to a scum scraping device.

[0002]

[Prior art]

 For example, in the final sedimentation basin of a sewage treatment plant, scum floats on the water surface, and it is necessary to remove it from the pond as appropriate. For this reason, for example, a fixed trough is installed between the side walls of the rectangular pond, and a weir that rises and falls at the water surface is provided in front of the trough. The scum is removed through the trough by swallowing with water. Although the weir is driven separately, one problem is to effectively swallow the scum on the water surface when the weir sinks.

[0003]

[Problems to be solved by the invention]

 Until now, the scum on the water surface was left floating and was drawn into the trough by the attraction force of the weir sinking operation, so it was not possible to swallow it effectively anymore, which hindered water purification. I was out.

[0004]

[Means for Solving the Problems]

 In order to solve the above-mentioned problem, the invention according to claim 1 is characterized in that a scum removal device is installed between opposed side walls in a sewage treatment facility such as a rectangular sedimentation basin, a sand basin, and the like. And damping means for raising and lowering the water surface as a boundary, and elimination means for attracting and excluding scum and water that have passed over the weir portion. A scum scraping device which is scraped and removed by the scum removing device, wherein the scum gathering plate is supported so as to be able to reciprocate along a guide provided only on one side of the equipment, The plate is characterized in that it scrapes scum on the water surface only when heading toward the scum removal device, and is in a non-scraping state when heading in the opposite direction to the scum removal device.

[0005]

【Example】

 Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments. 1 to 3 show an embodiment of the present invention. This embodiment is an example of a final sedimentation basin (or first sedimentation basin), where 1 is a sedimentation basin, 2 is left and right side walls, 3 is an end wall orthogonal to the side wall 2, and the sedimentation basin 1 is It is rectangular when viewed from above. In addition, 21 is a water surface.

[0006] Reference numeral 41 denotes a trough. The trough 41 has a square gutter shape, and has a lower front portion and a slightly higher rear portion, and communication troughs 42 are connected to both left and right ends in a communication manner. I have. Another trough (not shown) is connected to and connected to the communication trough 42.

A front portion of the trough 41 is lower than the water surface 21, and a rubber seal 43 is fixed thereon, and a rotary shaft 44 is provided thereon. The rotating shaft 44 is rotatably supported by bearings 45 (FIG. 3) fixed to the left and right front surfaces of the trough 41. The weir member 46 (see FIG. 1) is mounted to be able to swing up and down.

The weir member (weir means) 46 is of a hollow type capable of floating by itself, and a space between both ends of the weir member 46 and the trough 41 is sealed by a rubber seal (not shown). At the front of the weir member 46, a U-shaped receiving cam 47 is specially attached. The cam 47 has a front end facing the water surface 21 or lower and a peak portion higher than the water surface 21. The cam 47 is located only at the left end when the scum removing device 40 is viewed from the front.

On the other hand, an H-shaped guide rail (guide) 22 is fixed to the upper left side of the pond along the longitudinal direction. A sprocket 24 and a chain 25 are configured so as to be reciprocated by a drive source 23 before and after the guide rail 22.

A traveling body 27 is provided on the guide rail 22 so as to reciprocate by rollers 26. The traveling body 27 projects from one side of the pond in a cantilever manner toward the inside of the pond, and a hinge 28 is provided at the projecting portion. A scum shift plate 29 is attached via this hinge 28 so as to swing back and forth.

The scum gathering plate 29 covers the entire width of the pond, and a magnet 30 is provided at a desired position thereof. The magnet 30 is fixed when the scum gathering plate 29 swings backward. 31 can be adsorbed. The swinging backward is performed by the traveling body 27 traveling toward the scum removing device 40 and hitting the roller 32.

When the scum moving plate 29 is retracted in the direction of the anti-scum removing device 40 while being attracted to the fixed magnet 31, the scum moving plate 29 comes off by hitting the abutment plate 33 and maintains a vertical state by its own weight. .

Further, a pressing roller 35 is provided on the traveling body 27 via a stay 34, and the roller 35 advances in the direction of the scum removing device 45 together with the traveling body 27 and rides on the cam 47. , And acts to press the weir member 46 below the water surface. As a result, the scum floating on the water surface passes over the weir member 46 and is drawn into the trough 41. The scum flows in one direction of the trough 41, flows into the adjacent trough through the communication trough 42, and further flows into the end pit through another trough, and is eliminated.

When the pressing roller 35 retreats, the weir member 46 is lifted by its own weight, and the scum is not attracted. The reciprocating motion of the chain 25 is performed by a switch 36 fixed to the side surface of the guide rail 22. In addition, the scum shift plate 29 has a width slightly up and down in order to follow the fluctuation of the water level.

Further, a float may be provided at a free end of the scum shift plate 29 to generate buoyancy.

[0016]

[Effect of the invention]

 This idea is as described above. Therefore, the scum on the water surface can be aggressively swept away from the pond without being left as it is, thus promoting water purification. In particular, a guide was installed on one side of the processing equipment, and the guide was reciprocated by supporting the scum shift plate in a cantilever manner, so that the entire device was implemented simply and at low cost. . The sludge scraping device can be installed in a sedimentation basin, as well as in a sewage or water supply pipe to a treatment plant, a sand basin in a treatment plant, a flow channel, or the like.

[Brief description of the drawings]

FIG. 1 is a side sectional view of a scum scraping device showing one embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a sectional view taken along line III-III of FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Settlement pond 2 Side wall 21 Water surface 22 Guide 29 Scum board 40 Scum removal device 41 Elimination means 46 Damming means

Claims (1)

[Utility model registration claims] 1. A sewage treatment facility such as a rectangular sedimentation basin or a sand basin is provided with a scum removing device between opposing side walls, and the scum removing device includes damming means that moves up and down on a water surface. Elimination means for inviting scum and water that have passed over the damming means and excluding them to the other, so that scum on the water surface is raked in the direction of the scum removal device and eliminated by the scum removal device. In the scum scraping device, the scum gathering plate is supported so as to be able to reciprocate along a guide provided only on one side of the equipment, and the scum gathering plate is provided on the water surface only when heading to the scum removing device. A scum scraping device characterized in that the scum is scraped and the scum scraping device is in a non-scraping state when heading in a direction opposite to the scum removing device.