JPS5832794Y2 - Scum removal equipment in sedimentation ponds, etc. - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a scum removal device that efficiently collects scum floating on the water surface of a waterway or pond in a sedimentation pond of a sewage treatment plant, regardless of fluctuations in water level.

Conventionally, this type of scum collection device fixed the scum suction port to a float, and when the water level fluctuated, the suction port followed along with the float to collect the scum. The scum collection efficiency is not good because it does not have a device for conducting electricity.

In view of this, the present invention improves the scum collection rate by changing the scum suction port according to changes in the water level, and rotatably providing scum scraping blades that also serve as floats around the scum suction port. The following description will be given based on the embodiments shown in the drawings.

In the figure, 1 is a sedimentation tank etc. installed in a sewage treatment plant, etc. At the scum collection position of this sedimentation tank 1, the mount frame 2 of the scum removal device is erected so as to straddle the oil surface. A pipe-shaped rotating shaft 3 is rotatably supported substantially perpendicularly to the gantry frame 2, and the rotating shaft 3 is rotatably driven by a drive device 4 installed on the gantry frame.

A pump 6 for collecting scum is connected to the upper end of the rotating shaft 3 via a universal joint 5, and a suction port 8 for collecting scum and a rotating blade 7 for scraping scum are connected to the lower end of the rotating shaft. I will prepare it.

The rotary vane 7 and the suction port 8 may have any structure as long as they have a shape that changes according to changes in the water level of the pond.

Examples are shown in Figures 3 and 4.5.

In FIG. 3, a pipe-shaped scum suction port 8 is connected to the lower end of the rotating shaft 3 via a bellows-shaped telescopic hose 9, and a float is connected to the outer periphery of the scum suction port 8 via a suction port position adjustment bolt 10. A dual-purpose rotary blade 7 is provided.

Reference numeral 11 denotes a wear plate, which is attached to the mounting portion of the rotating blade.

Therefore, the rotary vane, which also serves as a float, is displaced following fluctuations in the water level, and expands and contracts the extensible hose 9 to move the suction port 8 up and down.

The embodiment shown in FIGS. 4 and 5 is a different embodiment in which a long hole-shaped suction port 8 is bored in the vertical direction of a pipe-shaped suction pipe 8a, and an outer pipe 12 is provided around the outer periphery of this suction pipe 8a. A suction guide 13 is slidably inserted into the outer tube, and a suction guide 13 is protruded from the outer tube.
The scum introduced into the inner tube is suctioned through the suction port 8 from the hole 12a bored in the outer tube, and even if this water level change occurs, the hole 12a of the outer tube will be removed at any position of the suction port 8.
Since a coincides with each other, both holes are brought into electrical conduction.

In this case, a rotary vane that also serves as Flow I is provided protruding from the outer pipe or suction guide, and when the rotary vane floats or sinks due to changes in water level, the outer pipe is slidably supported by the suction pipe in its normal position. may also be provided with support means 14.

The float/rotary vane 7 has a hollow interior or is integrally molded from a lightweight material such as a foam material so as to have a desired buoyancy.

In addition, the number of the rotating blades is 1 or 2 or more, and the shape is efficient for raking the scum from the central suction port.Furthermore, in order to improve the scum collection efficiency, the rotating blades are installed downstream of the rotating blades such as a sedimentation tank. A scum guide plate may also be provided along the blade.

According to the present invention, since the scum suction port is equipped with a rotary vane that also serves as a float, the scum is swept up to the scum suction port, and the distance between the suction port and the water surface is always kept constant even when the water level fluctuates. As a result, the scum collection efficiency can be significantly improved, and the adhesion of floating sludge is also reduced.

[Brief explanation of drawings]

Figure 1 is a plan view, Figure 2 is a side view, Figure 3 is an enlarged view of the scum suction port, Figures 4 and 5 are different embodiments from Figure 3, and Figure 4 is a side view. The external view and FIG. 5 are its cross-sectional views. 1... Sedimentation basin, 2... Frame,
3... Rotating shaft, 4... Drive device, 5...
... Universal joint, 6 ... Pump, 7 ... Rotating vane, 8 ... Suction port, 9 ... Telescopic hose, 10. ...Suction port position adjustment bolt, 11...Wear plate, 1
2... Outer pipe, 13... Suction guide, 1
4...Support means.

Claims (1)

[Scope of utility model registration request] A rotary vane that also serves as a float and a scum suction port is provided in the center of the rotary vane to collect scum on the lower end of a pipe-shaped rotary shaft rotatably supported in a sedimentation tank etc. A scum removal device in a sedimentation tank or the like, in which the rotating blade and the scum suction port are moved up and down by a mechanism.