JPH03284395A - Device for removing floating material on liquid surface - Google Patents

Abstract

PURPOSE:To scrape off the floating material on a liq. surface over a relatively large area by providing a plate-shaped blade freely rotatably connected to a rotating shaft. CONSTITUTION:A plate-shaped blade 7 freely rotatably connected to a rotating shaft 3 is provided. The center O of the shaft 3 is situated at a height of H above a liq. surface L, and the shaft is rotated in direction of the arrow A. The spindle 9 is circularly moved to positions a-m, and the tip 7a of the blade 7 is moved to positions o-w. The tip 7a is at position (a) when the spindle 9 is at position (a), the blade is rotated clockwise around the spindle 9 by the hinging between the blade 7 and spindle 9 when the blade collides with the liq. surface L, and the tip 7a comes to position (p) when the spindle 9 is at position (b). The scraping of the floating material is started from this position. Position (a) is the initial impact point of the blade, and the floating material is reversely scraped up over the area extending from points (a) to (b).

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is applicable to foams to which ink floating on the surface of a liquid is attached, such as in waste paper deinking equipment or activated sludge tanks in wastewater treatment equipment. The present invention relates to a device for removing suspended matter from a liquid surface for removing dirt and scum.

[Prior Art] As is well known, suspended matter floats in activated sludge tanks of used paper deinking equipment and wastewater treatment equipment, and it is necessary to remove these suspended matter.

FIG. 5 shows a conventional floating object removal device, which has a plurality of fixed blades 2 extending radially outward from a rotating shaft 1 installed at a predetermined height above the liquid surface, that is, the liquid level. Ta. Therefore, the tip 2a of the fixed blade 2 moves in an arc around the center O, so when scraping off floating matter F floating on the liquid level, the range in which the tip 2a comes into contact with the liquid level is limited. Put it away. If the fixed blade 2 is made longer, the contact area will be expanded, but it will stir the liquid, so
The removal effect of suspended matter decreases.

[Problem to be Solved] Therefore, an object of the present invention is to provide a floating material that can scrape off floating matter on a liquid surface over a relatively wide range and allow the scraped floating matter to fall over a long distance. to provide removal equipment.

[Means for Solving the Problems] According to the present invention, in a floating matter removal device that removes floating matter on the surface of a liquid using rotating blades, a plate-shaped blade rotatably connected to a rotating shaft is provided. There is.

It is also effective to attach the blades through elastic plates.

[Description of Effects] Therefore, when the rotating shaft rotates, the blades are tilted in the counter-rotational direction by the elastic plate rotatably connected to the rotating shaft. Therefore, even if the length of the blade is long, the tip of the blade moves substantially along the liquid surface and is only slightly submerged in the liquid.

Therefore, the range of contact by the blades is considerably widened, and as a result, floating objects can be scraped off over a wide range.

[Embodiment] The present invention will be described in detail below with reference to FIGS. 1 to 4. The illustrated example is an example in which the present invention is applied to scraping off bubbles in a deinking device of a used paper processing facility.

In FIGS. 1 and 2, a pair of stays 8 are fixed to the rotating shaft 3 diametrically opposite each other, and each stay 8 has an arcuate blade seat 4 attached thereto. A lug 5 is provided on this blade seat 4, a shaft 9 is rotatably attached to this lug 5, and a mounting plate 10 is attached to this shaft 9.
is fixed. The lug 5 and the shaft 9 constitute a hinge. An elastic plate 6, ie, a rubber plate, is attached to the fixing plate 10 by a fixing member 11, ie, a bolt/nut, and a metal plate blade 7 is further attached to the elastic plate 6 via a fixing member 12, ie, a bolt/nut. The blades 7 may be made of, for example, acrylic resin. Moreover, if a strong adhesive is used instead of the fixing tool 11 for bonding, a simple structure can be obtained.

Next, the operation will be explained with reference to FIG. It is assumed that the center O of the rotating shaft 3 is located at a height H above the liquid level, and that the rotating shaft 3 rotates in the direction of arrow A.

Therefore, the shaft 9 moves in a circular direction a-m, and FIG. 3 shows that the tip 7a of the blade 7 moves in the direction a-m.

First, when the shaft 9 is at position a and the tip 7a of the blade is at position a and collides with the liquid level, the blade 7 rotates clockwise around the shaft 9 due to the hinge action of the shaft 9. When the shaft 9 is in the position, the tip 7a is at the position opening. This is where the gathering of floating objects begins.

Here, in the case of only a plate, point a is the starting point of the blade falling, and a
The period from point to point b is what is called reverse gathering. On the other hand, in the illustrated embodiment, since the elastic plate 6, which is an elastic body, is provided, point b becomes the starting point of the blade fall, and no reverse scraping occurs.

As the shaft 9 moves with cSdSe, the tip 7a rotates clockwise around the shaft 9 due to the resistance of the liquid.
It moves as if dragging above the liquid level.

When the shaft 9 reaches position f, the elastic plate 6 is bent and curved along the blade seat 4 as shown in the upper part of FIG. come to the position. In other words, the blade 7 is substantially tangential to the blade seat 4. And as the axis 9 moves glh,
Similarly, the tip 7a moves, and is now located above the liquid level, and as the shaft 9 moves, it moves as follows. At this time, the elastic plate 6 is slightly bent due to the weight and rotational force of the blade 7.

Therefore, the scraping range Da is between the tip 7a and the position opening, and floating matter can be removed over a wide range. In addition, when the tip is located in the opposite direction, the scraped floating matter can be blown away by the restoring force of the deflection of the elastic plate 6.

[Effect of the invention] Fig. 4 (a) shows the case where the elastic plate 6 is not provided, and Fig. 4 (b)
FIG. 2 is a diagram showing a case where the invention of the present application is implemented.

That is, if the blades are simply hinged and rotatably connected without providing the elastic plate 6, so-called reverse raking occurs at the tips of the blades in the region indicated by the symbol X in FIG. 4(A). However, the range of gathering becomes considerably wider. In addition, if an elastic plate is provided, the tip 7 will bend due to bending.
As shown in FIG. 4(b), since the part a moves in a dragging manner on the liquid level, the effect of scraping off floating matter is improved.

Furthermore, floating objects scraped off by the elastic body are blown away relatively far.

[Brief explanation of drawings]

FIG. 1 is a side view of a device implementing the present invention, FIG. 2 is a perspective view of the entire device, and FIG. 3 is an explanatory diagram explaining the present invention in detail.
Figure 4 (a) is a diagram showing the effect when no elastic plate is provided;
FIG. 4(B) is an explanatory view showing the effect of providing an elastic plate, and FIG. 5 is a side view of the conventional device. 3... Rotating shaft 5... Lug 6... Elastic plate
7... Feather 7a... Tip of the feather 9...
Axis 11.12...Fixed tool tube 2 figures Mei 1 time, etc. 3 figures whistle 4 times (0) No. 5 @

Claims (2)

[Claims] (1) A device for removing floating matter on a liquid surface using rotating blades, which is characterized by having a plate-shaped blade rotatably connected to a rotating shaft. Device. (2) Removal of floating matter on the liquid surface according to claim 1, wherein the blade comprises only an elastic body or an elastic plate rotatably connected to a rotating shaft, and a plate-shaped blade fixed to the elastic plate. Device.