JPH0233842Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a current transformation plate used in a sedimentation tank.

Conventionally, when surface water is collected from a settling basin, sedimentation basin, reclaimed spillway, dam, etc. (hereinafter referred to as a settling basin, etc.), lifting phenomena such as floating currents, density currents, and convection occur near the collecting area. However, as a result, sediments or sediments at the bottom of the water are dragged in, leading to a decline in the quality of surface water. This phenomenon occurs particularly when the amount of water collected per unit time is large. Conventionally, no method has been found to effectively prevent these phenomena (usually referred to as carryover).

The present invention was completed as a result of various studies regarding the above-mentioned technical problems.

That is, the present invention is a current variable plate characterized in that a flap is provided at the water outlet of the current variable plate, the lower end of which is in a floating state and a weight is attached to the lower end.

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a front view showing an example of a current transformation plate. 1
2 is a current changing plate and 2 is a water outlet. FIG. 2 is a side sectional view of the current variable plate shown in FIG. 1. and 3
indicates a flap, and 4 indicates a weight.

As shown in FIG. 2, the current changing plate 1 of the present invention is provided with a flap 3 at the water outlet. This flap 3
is attached with its upper edge 5 above the water outlet 2 of the current variable plate. A weight 4 is attached to the lower edge of the flap 5. The flap 3 can be in the form of a sheet, a plate, or a steel rope. Also flap 3
Various materials can be used, such as flexible or hard materials such as plastic, cloth, rubber sheets, and iron, and the effectiveness can be further improved by using a combination of several of these materials. can. For example, by providing a hard plastic plate flap 3 at the upper water outlet part of the current variable plate, and by providing a flexible sheet-like flap 3 at the lower water outlet part, the upper water outlet can be relatively smoothly drained. pass through,
On the other hand, since the lower sheet-like flap 3 is provided with a weight 4 at the lower edge of the flap 3, the flap 3 acts as a water resistance and prevents water from passing through, thereby suppressing the flow of water at the bottom of the sedimentation tank. can. Furthermore, weight 4
Advantageous results can also be obtained by increasing the weight of the upper flap 3 successively from the upper flap 3 to the lower flap 3.

FIG. 3 is a cross-sectional view of the vicinity of the water collection part of a sedimentation tank using the current transformation plate of the present invention, and as is clear from FIG. It is possible to reduce as much as possible the upward flow from the wall, obtain the effect of an inclined plate, and prevent the occurrence of rectification and upward flow. Therefore, if the current variable plate of the present invention is used, sediments at the bottom of a sand settling basin etc. will not be mixed into the surface water due to the phenomenon of being swept up by the water current.

[Brief explanation of drawings]

Figure 1 is a front view of the current plate, and Figure 2 is the front view of the rectifying plate.
FIG. 3 is a side sectional view of the rectifying plate shown in the figure, and FIG. 3 is a sectional view of the water collection part of the settling basin.

Claims (1)

[Scope of utility model registration request] A current variable plate characterized in that a flap is provided at a water outlet portion of the current variable plate, the lower end of which is in a floating state and a weight is attached to the lower end.