JPS5832628B2 - Gravity traveling type scum removal device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for scraping and removing scum separated and floated from water in water treatment equipment, and more particularly to a scum removing device that runs using gravity.

Solid matter suspended in water that floats up naturally due to the difference in specific gravity with the water, or that floats up together with fine air particles generated from supersaturated air dissolved in water, is generally called scum.

As an example of the device for scraping scum is shown in FIG. The scraper 3 is suspended from the 2.

By moving the scraper 3 on the water surface, the scum is scraped up to one end of the tank 4 and removed. A drive shaft 6a provided with a drive sprocket wheel 5a at both ends and a driven shaft 6b provided with a sprocket wheel 5b at the other opposing end are installed on the side from which the drive shaft 6a is taken out.

Two chinos 2 are placed between both shafts, and scrapers 3 having a length approximately equal to the width of the tank 4 are attached to the chinos 2 at equal intervals.

In order to prevent interference between the lower cheno 2a and the upper cheno 2b and to allow the scraper 3 to move on the water surface, guide rails 1a and lb are provided respectively, on which the scraper 3 slides. .

The scraper 3 scrapes the scum on the water surface, collects it from one end of the tank 4 to the other end, and discharges it.

In such a scraping machine, the power required to move the scum floating on the water surface is consumed by the frictional force between the shaft 6 and the bearing, and between the scraper 3 and the guide rail 1 to constantly rotate the chino 2. The power generated by this is much greater.

Therefore, as the length and width of the tank increase, the frictional force increases as well, and there is a disadvantage that the mechanical force must be increased, resulting in waste.

An object of the present invention is to eliminate these drawbacks and provide a scum scraping and removing device that can be driven with small power.

As shown in FIG. 2, the principle of the present invention is to provide a reciprocating rail 11 that shoulders the downward slope, make the rolling elements 12 run, and roll from the end point of the lower end of the slope of the lower rail 11a to the starting point of the upper end of the slope of the upper rail 11b. A device 13 for lifting the moving body 12 is provided to circulate the rolling body 12.

An example in which the present invention is applied to an actual device is shown in FIGS. 3 and 4.

Lower rails 22a having a slope are provided on both sides of the tank 21 over the entire length of the tank 21, close to the water surface, and above the lower rails 22a are provided an upper rail 22 having an opposite slope.
b is provided, and from the lower end of the lower rail 22a to the upper rail 22
A transfer device 23 is provided above b.

The transfer device 23 is provided with rotating chinos 29 having claws 30 at approximately equal intervals along the transfer rail 24.

A traveling body 25 which can be moved freely is placed on the upper rail 22b and the lower rail 22a, and a scraper 26 is rotatably suspended from the traveling body 25.

This running body 25 is constructed by providing a running roller 27 provided at the upper end and guide rollers 28 that contact the side surfaces of the rail 22 at the front and rear.

To explain the operation using the above configuration, the upper rail 22
The traveling body 25 traveling on the rail from the starting point E in b moves along the slope by its own weight with the scraper 26 suspended, and the guide roller 28 moves the traveling roller 27 along the rail 22.
Guide above.

The scraper 26, together with the traveling roller 27,
2, and when moving along the lower rail 22a, it scrapes up scum on the water surface from one end of the tank 21 to the other end.

The transfer device 23 locks a part of the scraper 26 with a claw 30, raises the traveling body 25 along the lifting rail 24, returns the traveling body 25 to the upper rail 22b, and removes the scum via the scraper 26. It is discharged outside the tank 21.

Furthermore, since the claws 30 of the transfer device 23 are provided at approximately equal intervals, the traveling bodies 25 are dropped from point E at equal intervals.

Note that this device can arbitrarily adjust the traveling speed by changing the weight of the traveling body 25 and the slope of the rail 22.

Further, by changing the rotational speed of the transfer device 23 and the spacing between the claws, the spacing between the traveling bodies 25 can be adjusted as desired.

As described above, the following effects can be obtained by causing the traveling body equipped with the scraper to travel on the slope rail.

(1) Since the scraper runs under its own weight, power can be reduced.

(2) For repairs, the scraper can be removed and installed without stopping the equipment.

(3) Since the power of the transfer device is sufficient if it has the capacity to transfer one traveling body, it remains constant even if the number of scrapers or traveling bodies increases or the length of the tank increases.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing a conventional device, FIG. 2 is a diagram explaining the principle of the present invention, FIG. 3 is a sectional view showing an embodiment of the present invention, and FIG.
The figure is a partially enlarged perspective view showing the same component. 11a, 22a=...lower rail, 11b. 22b... Upper rail, 13... Rolling element, 21... Tank, 23... Transfer device, 25...
...Running body, 26...Skleno etc.

Claims (1)

[Claims] 1. An upper rail and a lower rail are provided at the upper part of the scum separation tank so that their vertical projections substantially coincide with each other, and a plurality of running bodies are provided on the rails so that they can be moved freely,
A scraper is swingably suspended on the traveling body, and the lower rail has its extended end curved to face the upper rail extension, and the gap between the upper rail end and the lower rail and the upper and lower rails are minimized. A gravity traveling type scum removal device characterized in that a gap is formed to allow passage of the traveling body, and the traveling body transfer device is provided on the side where the gap between the upper and lower rails is larger.