JPS5854844B2 - Scraping device for multilayer sedimentation basin - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a scraping device installed in the lower layer of a multilayer sedimentation pond, and relates to a device for scraping off sediment and, in particular, scraping off scum adhering to the ceiling surface of the lower layer. .

With the increase in urban population, the spread of sewage systems, and improvements in living standards, the amount of water treated at sewage treatment plants has increased, and multilayer sedimentation tanks have come into widespread use.

Conventional multilayered sedimentation tanks have sedimentation tanks stacked one above the other, and each sedimentation tank is equipped with a rotating wheel on both sides of the pond that spans approximately the entire length of the tank. A raking machine is installed to scrape the bottom of the pond.

In the sedimentation basin on the top layer, a supporting guide for scraping along the water surface is installed to scrape up the sludge that has surfaced on the water surface.

However, the sedimentation tank in the lower layer is filled with water up to the ceiling, and the ceiling cannot be built flat, so even if you install a support guide for the scraping board and scrape the ceiling, the scraped surface will be localized. .

Therefore, the sludge adhering to the ceiling can hardly be scraped off, and after a period of time, the accumulated layer of sludge peels off from the ceiling in a plate shape due to the putrid gas.

There was a drawback that the peeled plate-like sludge mixed into the supernatant water of the sedimentation tank and contaminated the treated water.

Furthermore, providing a separate scraper inside the pond to scrape up the sediment will agitate the water flowing into the pond, which will impair the effectiveness of the sedimentation treatment.

This invention solves the above-mentioned drawbacks, and makes it possible to scrape the ceiling of the lower pond by attaching a scraping board that operates independently of the sediment scraping board provided on the chest of the scraping machine to the said Cheno. The purpose of the present invention is to provide a scraping device.

The purpose of this invention is to provide a swingable lever between the sediment scraping plates attached to a rotating chendle over the entire length, and to provide a floating sediment scraping plate on one side of the lever. By placing the center of gravity on the opposite side of the fulcrum and limiting the rotation of the lever in the direction opposite to the direction in which the cheno moves, the floating scraping board scrapes the ceiling and the sediment scraping board scrapes the bottom of the pond. do.

The configuration of an embodiment of the invention will be explained based on the drawings.

Fig. 1 shows a multi-layer sedimentation tank forming two layers, and the lower sedimentation tank 1 has a drive wheel 2at, a bottom driven wheel 2b, a take-up wheel 2c, and a ceiling driven wheel 2d at the upper T' near the front and rear ends of the tank. One pair is provided respectively, and one pair of endless chinos 3 are connected to the wheels 2a.

2b, 2c, and 2d so as to be rotatable.

Figures 2 and 3 show how to install the scraper.

The Cheno 30 is provided with sediment scraping plates 5 at approximately equal intervals via brackets 4, and between the sediment scraping plates 5, a bearing 6 and a rotation restriction piece 7 are provided via the bracket 4. Lever 8
is pivoted so that it can swing freely.

The lever 8 has a contact surface 9 against which the rotation limiting piece T comes into contact when the lever 8 is in a position parallel to the chino 3, and is in a position perpendicular to the chino 3 (when in this position, it protrudes beyond the sediment scraping plate 5). The floating sludge scraping plate 10 is fixed to one end of the lever 8, and a weight 11 is fixed to the other end of the lever 8.

When the Cheno 3 rotates in the direction of the arrow in the lower sedimentation basin 1 in Fig. 1, the operation of which will be described below with the above structure, the sediment scraping plate 5 scrapes the bottom of the basin and moves from E to C. Scrape up the sediment.

On the other hand, the lever 8, which rotates together with the chino 3, attempts to stand upright with the floating scraping board 10 on top between B, A, and D in the figure using a weight 11; The board 10 comes into contact with the ceiling of the lower layer and moves while tilting in the opposite direction to the direction in which the chino 3 moves.

In the B part, as shown in FIG. 4, and in the D part, as shown in FIG. 6.

E and F in Figure 1. The lever 8 moving in the C section has the rotation control piece 7 and the contact surface 9 in contact to regulate the posture of the lever 8, and in the E section, the lever 8
As shown in the figure, the lever 8 is being moved horizontally to the lower side, and at the F section, the lever 8 is maintained horizontally G as shown in FIG. 8 to prevent interference with the pond bottom.

At part C, it can be inverted (it is inverted) as shown in Figure 5.

As described in the above-mentioned structure and operation, the present invention has a floating sludge scraping plate swingably attached to the chest of the sediment scraping machine, so that the sludge scraping plate scrapes the ceiling of the sedimentation tank. It is possible to scrape and dispose of floating debris from the ceiling surface (before it accumulates).

[Brief explanation of drawings]

Fig. 1 is an overall explanatory diagram of the present invention, Fig. 2 and Fig. 3 are front views and plan views of the sediment scraping board and the floating sludge scraping board, respectively.
8 are detailed views of sections B-F in FIG. 1, respectively. 6: Bearing, 7: Rotation limiting piece, 8: Lever, 10: Floating scraping plate, 11: Weight.

Claims (1)

[Claims] 1 Sediment scraping device equipped with a freely rotatable endless band on which a sediment scraping plate is attached to the lower tank of a multi-layered sedimentation tank A floating scraping board is fixed to one end of the lever, and a weight whose center of gravity is located on the other end is fixed to the other end of the lever. A raking device for a multi-layer sedimentation tank characterized by having a lever rotation restriction piece in the opposite direction.