JPS5931288Y2 - fine mesh screen - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an improvement of a fine-mesh screen for removing impurities from wastewater that can be inspected, repaired, cleaned, etc. easily and quickly.

Traditionally, in small-scale sewage treatment plants (for example, for 100 to 5,000 people), fine-mesh screens equipped with scraping devices have been installed as pretreatment of wastewater to remove impurities contained in the wastewater. ing.

At this time, the contaminants contained in the wastewater are diverse and in large quantities, and the screen is fine, so the screen gets clogged quickly, requiring inspection, repair, and cleaning of the screen and scraping device. It had to be done quite often.

However, since the above-mentioned device is equipped with a scraping mechanism particularly at the back of the screen, inspection thereof requires an extremely large amount of time and effort, and is always accompanied by difficulty.

The object of this invention is to eliminate the above-mentioned drawbacks and to provide a fine-mesh screen that allows extremely simple and quick inspection.

An embodiment of this invention will be described below with reference to the drawings.

As shown in FIG. 1, a fine mesh screen 1 according to this invention covers the upper surface 3 of a running portion of a raking device 2 and is detachably fixed to the raking device 2.

The raking device 2 is installed on a side wall 6 of the sewage channel, with one end immersed in the sewage channel 4 and the other end firmly supported by a support section 5 above the water surface.

The scraping device 2 is equipped with a pair of chains (travel section) 9 that run along chain wheels γ and 8 that are driven by a drive section (not shown).

As shown in FIG. 2, a planting base 10 is installed on this chain 9 at an appropriate interval in a shape that straddles between the pair of chains 9, and this planting base 10 is used to scrape up foreign matter. The comb teeth 11 for use are implanted at each interval of the bars, which will be described later.

As shown in FIG. 3, the fine mesh screen 1 covered and installed on the upper surface 3 of the running section of the scraping device 2 is composed of a framework 12 and a bar screen 13 fixed to the framework 12.

As shown in FIGS. 1 and 3, the framework 12 extends along the upper surface 3 of the running section, and then includes a side frame 14 that rotates half a turn along the chain wheel 8, and a side frame 14 that fixes both ends of the side frame 14. It has a frame 15 and a T frame 16, and has an upper frame 15 and a T frame 16.
The frame 16 is a support frame (support part) 17 of the scraping device 2.
and 18, and are detachably fitted and fixed, for example, by their own weight.

A hole 19 for a clue is bored in the side surface of the side frame 14.

The bar screen 13 fixed to the framework 12 is formed by arranging bars 20, which have both ends fixed to the upper frame 15 and the lower frame 16, in parallel at minute intervals (for example, several millimeters).

The comb teeth 11 protrude outward between adjacent bars 20 and are formed to be able to scrape up impurities in the waste water.

According to this invention, contaminants in the wastewater flowing in the direction of the arrow in the wastewater channel 4 are captured by the bar screen 13, and are scraped up by the comb teeth 11 of the scraping device 2 whose one end is immersed in the wastewater 4. The waste is collected in the storage section 21.

Here, the fine mesh screen 1 has a supporting frame 17 and 1
8, for example, so that inspection, repair, cleaning, etc. can be carried out extremely easily and quickly by removing the fine mesh screen 1.

In particular, clogging of the fine mesh screen and cleaning of the comb teeth 11 have been extremely difficult in the past, but with this invention, it can be done so easily and accurately that it can be called revolutionary.

In addition, there are holes 19 for handing in the side frame 14 of the fine screen 1.
, the fine mesh screen 1 can be removed extremely easily.

Note that it is preferable that one end of the contaminant storage section 21 has a comb-teeth shape that engages with the bar screen 13 so as to be movable.

As described above, the fine mesh screen of this invention has an excellent practical effect in that inspection of the raking device can be carried out extremely easily and quickly.

In this embodiment, the fine mesh screen is removably supported by the support frame of the scraping device, but the present invention is not limited to this embodiment, and any means may be used as long as it can be properly supported.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of a device to which a fine mesh screen according to the invention is applied, FIG. 2 is a perspective view showing the relationship between the chain and the implanted base, and FIG. 3 is a perspective view of the fine mesh screen. 1... Fine mesh screen, 2... Scraping device, 3... Upper surface of the running section, 9...
Chain (running part), 11... Comb teeth, 12...
...Framework, 13...Bar screen, 17
, 18...Support frame (support part), 20...
・Noku-.

Claims (1)

[Scope of utility model registration request] A frame that covers the upper surface of the running part of the raking device and is mounted and fixed to the supporting portion of the raking device by its own weight, and a bar screen that has bars arranged in parallel with both ends fixed to the upper and lower frames of this framework, and the above-mentioned. A fine-mesh screen is provided with comb teeth that are implanted in a running portion of a raking device and protrude outward from the spacing between the bars.