JPH0516261Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention is a dust removal device that is installed in a waterway and scoops up and removes dust floating in seawater or river water flowing through the waterway. Regarding the traveling screen.

[Prior art] For example, a traveling screen in which a basket with a filter such as a net on the back is attached to an endless chain so as to be connected vertically, and the endless chain is driven to scoop up dirt in the water and discharge it to the upper part of the water for removal, has been developed. It is disclosed in 1988-130819, Utility Model Publication No. 1-28106, etc.

[Problem that the invention aims to solve] For example, for traveling screens used at cooling water intakes in thermal power plants, it is necessary to target inflows such as jellyfish, small fish, algae, vinyl pieces, and driftwood. Therefore, we have installed a screen device with a corresponding processing capacity, but with conventional equipment,
Since the filter body installed on the back of the basket is formed into a flat surface, it is possible to prevent incoming dust, especially large amounts of jellyfish and vinyl pieces, from flowing in a flat surface so as to cover the entire surface of the filter body. It sticks to the wall and completely blocks the water passage, resulting in
There is a problem that various troubles occur frequently.

A situation in which dirt flowing in running water flows into a basket and adheres to a filter will be explained.

Dust particles with a specific gravity close to that of water move horizontally from left to right with the flow of water as shown in Figure 6(a) and adhere to the filter body of each basket.

As each basket rises one after another, the filter body near the water surface gradually becomes covered with dirt and debris.
For this reason, water tends to flow from the bottom, which is not yet attached. Figure 6 b, c Objects with very low specific gravity float near the water surface independently of the water flow, but objects with specific gravity equal to or close to water flow in exactly the same way as water. As a result, the filter bodies are clogged one after another by debris and rapidly.

The same is true for a single basket.

As shown in Fig. 7, when objects 20 and 21 are attached to the filter body, they are blocked by the objects 20 and 21, so water flows A and B do not occur, and only flow C exists. . As a result, all of the filters are blocked, and since water no longer flows through the filters, the next incoming object will not adhere to the filters.

The present invention was devised in view of the above-mentioned problems of the conventional technology, and its purpose is to prevent thin, flat debris such as lint or vinyl from flowing into the basket. A large amount of dust can be processed with high capacity by preventing it from sticking to the inner surface of the filter body uniformly on a flat surface, and a large amount of dust is also prevented from sticking to the filter body. The purpose of the present invention is to provide a traveling screen that can still secure a necessary and sufficient water flow surface even when the water is used.

[Means for Solving the Problems] In order to achieve the above object, the traveling screen of the present invention has a structure in which a number of continuous baskets each having a filter such as a net on the back are moved from the underwater part to the upper part of the water. In the dust removal device, the dust is scooped up in each basket by the feeding drive of the endless chain and discharged at the upper part of the water. A dust adhesion prevention plate is provided to prevent dust from adhering on a flat surface.

The dust adhesion prevention plate is preferably formed by vertically arranging a plurality of strip plates having different heights, shapes, or sizes.

[Function] In FIG. 1, when the endless chain 1 suspended between the upper and lower sprockets 11 and 12 is forward-driven by the motor 10, the upstream baskets 2, 2, etc. attached to the endless chain are submerged together with the chain. The basket moves upward one after another to the upper part of the water, scoops up debris such as jellyfish floating in the water, and is turned over on the return side of the upper part of the water, thereby discharging the trash in the basket through the chute 13 to the drain 14. .

Debris such as jellyfish flowing into the basket 2 is caught by the filter body 3, but since the filter body 3 is provided with dust adhesion prevention plates 4 of different heights on its inner surface, it is difficult to prevent jellyfish and other debris from adhering to the filter body 3. As shown in FIG. 4, an object 22 that is thin and spread out in a planar manner will be caught on three-dimensionally inclined parts at different heights, and will be further caught on top of it in different directions. As a result, even if a considerable amount of dust adheres to the multiple layers, water passing surfaces S ₁ , S _{2 .} . . are secured between the filter body 3 and the filter body 3.

In addition, as shown in FIG. 5, when stick-shaped garbage flows into the basket 2, there are various types of garbage such as vertically like the object 23 and horizontally like the object 24. An object 25 flowing in from the front collides with the previous object 24 and moves the object 24 and the vinyl piece 26 attached to the object. Therefore, as a result, even if a large amount of debris including rod-shaped objects flows in and adheres in a layered manner, the required water-permeable surface is secured.

[Example] Fig. 1 shows a case where the present invention is applied to a traveling screen.

In the same figure, the endless chain 1 is suspended between an upper sprocket 11 which is pivotally supported on a frame 15 above the water so that two threads are located on both sides of the waterway, and a lower sprocket 12 which is pivotally supported at the bottom of the water.
It is driven to be forwarded in the direction of arrow 16 at a constant speed.

The basket 2 is attached between the two left and right endless chains so that the upper and lower parts are in contact with each other.

A filter body 3 made of a net perforated plate, a bar, etc. is provided on the back side of each basket 2, and a shelf 5 is provided at the bottom thereof with an upward slope toward the front.

As shown in FIGS. 2 to 5, the dust adhesion prevention plate 4 is made up of strips of different heights arranged vertically on the inner surface of the filter body 3 at a required interval. The strips may be spaced at regular intervals or may be spaced at slightly different intervals. In addition, materials that differ not only in height but also in thickness, shape, size, etc. are used.

In this way, when strips with different heights are arranged vertically and fixed, the edges of the strips will receive the incoming debris, so the debris will be flat against the filter body. Instead, it becomes attached in an extremely complicated manner.

Therefore, even if a considerable amount of dust adheres to the multiple layers, the minimum necessary water-permeable surface will be ensured. As a result of water containing dust flowing in and out through this water surface,
The value of the average adhesion height t of garbage can be dramatically increased, and therefore the amount of garbage processed Q can be increased.

Q=t×B×v B=inner width of shelf v=rising speed of filter body (basket) The present inventors confirmed this fact through hydraulic experiments. The thickness of the inflowing garbage (object) is 35
mm konniyaku was used.

The above experiment was conducted for case X without an anti-adhesion plate, Y when an anti-adhesion plate of the same height was installed, and Z when an anti-adhesion plate of different height was installed, and the graph shown in Figure 8 was The results shown in the diagram were obtained.

Although the embodiment of the present invention has been described with respect to a traveling screen, it can also be implemented with a drum-type screen configured by disposing a filter body on a disk or in a cylinder.

[Effects of the invention] Since the present invention is configured as described above,
This produces the following effects.

Since dust adhesion prevention plates with different heights are installed on the front of the filter body, even if dust containing objects such as thin, flat jellyfish or pieces of vinyl flows in, it will stick to the filter body uniformly in a flat plane. Because it does not adhere to the surface, it can capture a large amount of dust.

The dust prevention board is made up of strips arranged vertically, and each one is different in height, shape, size, etc. Therefore, the dust that flows in and lands on the surface adheres in an extremely complicated manner, and the gaps between the sheets are very complicated. This allows a suitable water flow surface to be secured even if a large amount of dust adheres to the surface. Therefore, water can flow in and out through this water flow surface, making it possible to significantly increase the throughput.

Debris containing rod-shaped objects can be deposited in various orientations, such as vertically or horizontally, but the debris that comes in later displaces the previous debris by collision. As a result, the amount of debris trapped before clogging can be significantly increased.

It has a simple configuration, is easy to implement, and is advantageous in terms of cost.

[Brief explanation of the drawing]

Fig. 1 is a side view of the entire traveling screen according to the present invention, Fig. 2 is a partially enlarged plan view of the basket portion of the present invention, Fig. 3 is a vertical side view of the same basket, Figs. Figure 5 is an enlarged plan view of the filter body, Figures 6 a, b, and c are schematic diagrams showing the conventional dust adhesion situation, Figure 7 is a vertical cross-sectional side view of the conventional basket, and Figure 8 is a comparison graph line. It is a diagram. 1...Endless chain, 2...Basket, 3...
...Filter body, 4...Dust adhesion prevention plate.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A large number of continuous baskets each having a filter such as a net on the back are provided in an endless chain so as to move from the underwater part to the upper part of the water, and the endless chain is driven by a forwarding drive. In a dust removal device that scoops up dust in each basket and discharges it above the water, a dust adhesion prevention plate is provided at the upstream side of the basket and in contact with the inner surface of the filter body to prevent dust from adhering to the surface. A traveling screen that features the following features: (2) The traveling screen according to claim 1, wherein the dust adhesion prevention plate is formed by vertically arranging a plurality of strips having different heights, shapes, or sizes.