JP3625015B2 - Scum remover - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a scum removing device, and more particularly, to a scum removing device used for removing scum floating on a liquid surface such as a sedimentation basin in sewage treatment from the sedimentation basin.
[0002]
[Prior art]
In a sedimentation basin or the like in sewage treatment, a large number of scum is floating on the liquid surface. These scums are removed from the pond by a scum removing device. Conventionally, as this kind of scum removing device, a tubular trough is rotated manually or electrically, and the scum is introduced into the trough together with water from an inflow port formed by notching the front surface of the trough to be eliminated. is there. Also, it is generally called a non-powered scum removing device, and an overflow weir is attached to the front of a fixed rectangular trough, and this overflow weir is manually or mechanically transmitted from a traveling flight plate, or Similarly, it is widely known that the scum is pushed down by using mechanically transmitted power from other equipment and the scum is made to flow into the trough to be eliminated.
[0003]
Here, in the so-called multi-water channel type sedimentation basin in which a plurality of the sedimentation basins are arranged side by side, each sedimentation basin is provided with an overflow weir and an opening / closing mechanism for opening and closing the overflow weir. It is widely practiced to allow floating scum to flow into the liquid level of each sedimentation basin.
[0004]
[Problems to be solved by the invention]
However, if an opening / closing mechanism for opening and closing the overflow weir is provided for each settling basin as in the above-described conventional example, the mechanical equipment and electrical equipment become complicated and considerably expensive. Moreover, if the scum flows into the common trough, even if there is a certain time lag at the beginning, this time lag gradually disappears and the overflow weirs overlap. There is. In this way, if the overflow weirs overlap, the water flow in the trough will temporarily increase and the flow will worsen, especially in the pond upstream of the outflow trough, in order to prevent this from happening However, there was a problem that it was necessary to increase the size of the trough.
[0005]
The present invention has been made in view of the above circumstances, and it is possible to reliably open and close each overflow weir with a relatively simple mechanism, and to remove scum from a plurality of sedimentation basins with a single driving device, and in common. It is an object of the present invention to provide a scum removing device that prevents the overflow weirs from overlapping when the trough is used.
[0006]
[Means for Solving the Problems]
The scum removing device of the present invention includes a plurality of sedimentation basins and overflow weirs between each of these sedimentation basins and troughs, and each of these overflow weirs is opened to float on the liquid level of each sedimentation basin. In the scum removing device in which each scum is individually allowed to flow into the trough, each overflow weir is configured to be opened by pushing down a pivotable opening / closing lever provided for each overflow weir. And an endless traveling body attached with a striker that travels endlessly above each of the open / close levers and pushes it downward when positioned above the open / close lever.
[0007]
As a result, the overflow weirs provided in each settling basin can be opened individually by running the endless traveling body and sequentially pushing down the open / close levers with a striker attached to the endless traveling body. The timing at which each open / close lever is operated can be kept constant regardless of changes over time.
[0008]
Further, the present invention is characterized in that a plurality of the strikers are detachably attached to the endless traveling body. Thus, the frequency of opening and closing the overflow weir can be increased or decreased by adjusting the number of strikers.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. In this embodiment, as shown in FIG. 1, the present invention is applied to a plurality of water channels provided with four settling basins 1a to 1d arranged in parallel with each other and a common trough 2 crossing these settling basins 1a to 1d. Although an example is shown, it is needless to say that the present invention is not limited to this.
[0010]
As shown in FIG. 2, between each said sedimentation basins 1a-1d and the trough 2, it is comprised by the overflow weir 3 which consists of a rubber-made gate with a float, for example, and a lower end can be freely opened and closed to the trough 2 Each of the supported overflow weirs 3 is arranged. When each overflow weir 3 sinks below the water surface against its buoyancy, the scum floating on the liquid surface of each of the sedimentation basins 1a to 1d flows into the trough 2 together with water.
[0011]
At the upper end of each overflow weir 3, the lower end of the connecting link 4 extending in the vertical direction is fixed rotatably. Further, the upper end of the connecting link 4 is rotatably connected to an intermediate portion of an opening / closing lever 5 whose base end is rotatably supported by the trough 2 and extends obliquely upward in a direction perpendicular to the flow direction. Accordingly, the overflow weir 3 is moved downward to the lower surface of the water by pushing the opening / closing lever 5 downward, the overflow weir 3 is opened, and the opening / closing lever 5 is returned upward so that the overflow weir 3 is buoyant. Thus, the overflow state is restored and the overflow weir 3 is closed, and at the same time, the open / close lever 5 is also restored to the original state.
[0012]
Here, the open / close levers 5 are fixed to the trough 2 so as to protrude above the upper end surfaces of the settling basins 1a to 1d. In addition, the protruding end portion is formed in a shape curved downward in an arc shape.
[0013]
On the other hand, the endless rope 10 as an endless traveling body is arranged so as to travel along the upper side of each open / close lever 5 in the travel (or return) of the endless rope 10 across the settling basins 1a to 1d. Has been. The endless rope 10 is stretched between a drive sheave wheel 12 and a tail sheave wheel 13 provided with a drive device 11 such as a drive motor. Thereby, the endless rope 10 travels in a constant direction at a constant speed as the drive sheave wheel 12 rotates at a constant speed in a constant direction.
[0014]
In this embodiment, two strikers 14 are detachably attached to the endless rope 10, and the striker 14 moves to the opening / closing levers in the forward (or return) stroke of the endless rope 10. 5 are sequentially contacted and slid and pushed downward.
[0015]
That is, for example, when the striker 14 reaches the upper part of the settling basin 1c as shown in FIG. 2, the open / close lever 5 that opens and closes the overflow weir 3 of the settling basin 1c is pushed down to Open 3 When the endless rope 10 travels and the contact between the striker 14 and the lever 5 is released, the overflow weir 3 is closed by its buoyancy and the opening / closing lever 5 is returned to its original state. When the endless rope 10 further travels and reaches above the settling basin 1d, the open / close lever 5 that opens and closes the overflow weir 3 of the settling basin 1d is pushed downward to open the overflow weir 3, and when it passes further, the overflow Close the weir 3.
[0016]
In this embodiment, since the common trough 2 is provided, two strikers 14 are attached, and the striker 14 attached to the endless rope 10 on the forward (or return) stroke side is an open / close lever. However, the number may be one, and the frequency of opening and closing the overflow weir can be increased or decreased by adjusting the number of strikers.
[0017]
Here, as shown in FIG. 2, a rope guide 15 is spanned in parallel to a position corresponding to the travel (or return) of the endless rope 10, and a guide 16 slidably contacting the striker 14 is attached. Thus, it is possible to prevent the lifting due to the reaction force of the opening / closing lever 5 of the striker 13 by the tension of the rope guide 15.
[0018]
In addition, in the said embodiment, although the example which used an endless rope as an endless traveling body is shown, it is needless to say that an endless wire, an endless chain, etc. may be used instead of this endless rope. It is. Thus, various modified embodiments are possible without departing from the spirit of the present invention.
[0019]
【The invention's effect】
As described above, according to the present invention, it is possible to reliably open and close each of the plurality of overflow weirs with a single drive unit that runs the endless traveling body. As a result, it is not necessary to provide an opening / closing mechanism for opening / closing the overflow weir for each settling basin, and the structure can be simplified and the associated costs can be reduced. Moreover, even if the scum flows into the common trough, it is possible to select different timings for operating the open / close levers, preventing the overflow weir from overlapping and overflowing the water from the trough. can do.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an outline of an embodiment of the present invention.
FIG. 2 is a schematic diagram viewed from the direction A in FIG.
3 is a cross-sectional view taken along line BB in FIG.
[Explanation of symbols]
1a to 1d Sedimentation basin 2 Trough 3 Overflow weir 5 Opening / closing lever 10 Endless rope (endless traveling body)
11 Drive Device 12 Drive Sheave Wheel 13 Tail Sheave Wheel 14 Striker

Claims (2)

In multiple sedimentation basins, each trough of each sedimentation basin is provided with overflow weirs, and each of these overflow weirs is opened to allow the scum floating on the liquid level of each sedimentation basin to individually flow into the trough. In such a scum removing device,
Each overflow weir is configured to be opened by pushing down a pivotable opening / closing lever provided for each overflow weir and running endlessly above each opening / closing lever. A scum removing device comprising an endless traveling body to which a striker is attached to push down a lever when positioned above the lever. The scum removing device according to claim 1, wherein a plurality of the strikers are detachably attached to the endless traveling body.

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