JPS64968Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a sludge scraping device in a two-story rectangular settling tank.

In water treatment plants with small sites, a two-story tank type sedimentation tank is used because the sedimentation tank cannot have a sufficient water surface load.
Link belt type sludge scrapers are mainly used. However, this sludge scraper not only has a complicated structure and high equipment costs, but also has the drawbacks of being troublesome to maintain, manage, and maintain, and having high running costs.

This idea was made in order to eliminate the above-mentioned drawbacks of the conventional method, and basically adopts the Mida type, which is advantageous in terms of cost, maintenance, management, etc., as a sludge scraper in a two-story rectangular settling tank. By configuring this to be compatible with a two-story rectangular settling tank, the present invention aims to provide a sludge scraping device that is inexpensive, easy to maintain and manage, and has good processing efficiency.

Hereinafter, embodiments of this invention will be described with reference to the drawings.

In the figure, reference numeral 1 denotes a two-story rectangular settling tank, and a sludge pit 3 is provided at the front of its bottom 2 to receive the collected sludge and discharge it to the outside. Sludge receiving shelves 5,5 are provided protruding from the upper and lower middle parts of both side walls 4,4 of the sedimentation basin from the upper position of the sludge pit 3, and both sludge receiving shelves 5,5
A gap passage 6 (FIG. 2) in the longitudinal direction of the sedimentation basin 1 is formed between the edges of the sedimentation basin 1. Furthermore, rails 7, 7 are laid parallel to each other along the longitudinal direction on both side walls 4, 4 of the sedimentation tank 1, and a running cart 8 that reciprocates over the sedimentation tank 1 is mounted on these. .

A support shaft 9 (FIG. 1) is provided on the lower surface side of the traveling truck 8 in the transverse direction of the sedimentation basin 1, and a movable arm 1 is provided in the center thereof and extends toward the bottom surface 2 through the gap path 6.
The base end of the movable arm 10 is pivotally mounted, and the lower end of the movable arm 10 is provided with rollers 11, 11 for smoothly moving it onto the bottom surface 2. A raking plate 12 for raking up accumulated sludge and the like is pivotably mounted at its upper edge portion around a shaft 13 extending in the transverse direction of the settling tank 1. Also, movable frame rods 15, 15 for sludge receiving shelves are located on both sides of the movable arm 10, have their upper ends pivoted to the support shaft 9, and are connected to the movable arm 10 by connecting rods 14 (FIG. 1). rollers 16, 16 that roll on the sludge receiving shelf 5 are provided at their lower ends, as well as scrapers for scraping up sludge, etc. accumulated on the sludge receiving shelf 5. A plate 17 is pivoted at its upper edge about an axis 18 extending transversely to the sedimentation basin 1.

One end of a hanging rope 20 is tied to the middle part of the movable arm 10 and is wound up and unwound by a power device 19 installed on the traveling trolley 8. The movable frame rods 15, 15 are equipped with a power device 1 at the center of each of the movable frame rods 15, 15 and the movable frame rods 15, 15.
The lower ends of control ropes 21, 22, 22, which are pulled up and pulled back by 9, are tied together.

Next, to explain the operation of this devised device, the sludge that settles in the sedimentation tank 1 is also deposited on the sludge receiving shelves 5, 5 protruding from the bottom and the middle part. To perform raking, move the traveling trolley 8 to the rear end side of the sedimentation basin 1 (right side in Figure 1), unwind the hanging rope 20, and move the movable arm as shown by the solid line in the figure. The roller 11 of is grounded on the bottom surface 2. In this case, since the movable frame rod 15 is also connected to the movable arm 10, it swings in the same manner as the movable arm 10, and its roller 16 is also grounded on the sludge receiving shelf 5. In addition, each scraping board 12,1
7, 17 by stretching their control ropes 21, 22, 22 and grounding their lower edges. Then, when the traveling cart 8 is moved toward the front end of the sedimentation tank 1, the sludge on the bottom surface 2 and the sludge receiving shelves 5, 5 is removed from the scraping plates 12, 17,
17, the sludge is scraped off from the bottom surface 2 and the ends of the sludge receiving shelves 5, 5 into the sludge pit 3, and is discharged to the outside of the settling tank 1.

Once the above-mentioned raking process is completed, the hanging rope 2 is next
0 and lift the movable arm 10 as shown by the chain line in FIG.
22 is pulled up and each scraping plate 12, 17, 17 is rotated in the horizontal direction, and the traveling trolley 8 is moved back toward the rear end side of the sedimentation basin 1. In this way, the traveling carriage 8 is repeatedly moved back and forth.

In addition, in the above embodiment, the movable arm 1
0 and the movable frame rods 15, 15 are coupled, and by the swinging of the movable arm 10, the movable frame rods 15, 15
Although the movable arm 10 and the movable frame rods 15, 15 can be lifted and lowered separately using hanging ropes.

As explained above, the sludge scraping device of this invention has a movable arm attached to a traveling carriage that reciprocates along the longitudinal direction of a two-story rectangular settling tank with a sludge receiving shelf formed in the vertical middle part of the tank. The arm is pivotably mounted to be swing-adjustable in the running direction, and a scraping plate for the sedimentation tank bottom is pivoted to the lower end of the arm to be swing-adjustable in the running direction. The movable frame rod, in which the raking plate for the receiving shelf is pivoted so as to be swing-adjustable in the running direction, is pivoted so as to be swing-adjustable in the running direction. Sludge scraping can be carried out efficiently at the same time, and each scraping plate can be swung to a horizontal position along the water flow when not scraping due to the backward motion of the traveling trolley, which disturbs the water flow and removes the sludge. without damaging the deposition of Moreover, the mechanism is simple and can be manufactured at low cost, maintenance and inspection are easy, and running costs can be reduced, making it possible to provide a sludge scraping device suitable for a two-story rectangular settling tank.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view showing an embodiment of this device, and FIG. 2 is a front sectional view thereof. 1... Rectangular sedimentation tank, 2... Bottom, 4... Side wall, 5...
Sludge receiving shelf, 8... Traveling trolley, 10... Movable arm, 1
1... Roller, 12... Scraping board, 15... Movable frame rod, 1
6... Roller, 17... Scraping board, 20... Hanging rope, 2
1, 22...control rope.

Claims (1)

[Scope of utility model registration request] A movable arm is pivotally attached to a traveling cart that reciprocates along the longitudinal direction of a two-story rectangular sedimentation tank with a sludge receiving shelf formed in the vertical middle part of the pond, and the movable arm is pivotably adjusted in the traveling direction. At the lower end of the arm, a scraping plate for the bottom of the sedimentation tank is pivoted so as to be able to swing freely in the running direction, and at the lower end of the traveling truck, a scraping board for the sludge receiving shelf is swing-adjustable in the running direction. A sludge scraping device for a two-story rectangular sedimentation tank, characterized in that a movable frame rod is pivotally connected to the frame so as to be swingable in the traveling direction.