JP2528878Y2 - Traveling screen - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a dust removing device which is installed in a waterway and removes dust floating in seawater or river water flowing through the waterway by scooping up from the water, particularly, Regarding the traveling screen.

[Background Art] Traveling screens in which a basket provided with a filter body such as a net on the back surface is attached to an endless chain so as to be connected vertically, and the endless chain is driven to scoop up dust in water and discharge and remove the dust to the upper part of the water, for example, are actual screens. It is disclosed in Japanese Utility Model Laid-Open No. 60-130819 (Japanese Utility Model Publication No. 1-28610) and Japanese Utility Model Application Laid-Open No. 2-62916.

[Problems to be solved by the invention] For example, traveling screens used in cooling water intakes of thermal power plants need to target inflows of jellyfish, small fish, algae, vinyl chips, driftwood, etc. ,
Although a screen device with a corresponding processing capacity is installed, in the conventional device, since the filter body provided on the back of the basket is formed entirely flat, the incoming dust, especially a large amount of jellyfish, With respect to vinyl pieces and the like, they stick flatly so as to cover the entire surface of the filter body, so that the water passage portion is completely closed, and as a result, there is a problem that various troubles occur frequently.

A situation in which dust flowing during the inflow flows into the basket and adheres to the filter will be described.

The dust having a specific gravity close to water moves horizontally from left to right by the flow of water as shown in FIG. 10 (a) and adheres to the filter of each basket.

As each basket rises one after another, the filter body near the water surface gradually spreads with garbage deposits, so that the water tends to flow from the lower part that has not yet adhered.
Fig. 10 (b) (c) In the case of an object having a very small specific gravity, it is floating near the water surface independently of the water flow, but when the specific gravity is equal to or close to water, it is exactly the same as water. As a result of the flow, the filter concentrates on the filter body that has not yet been closed, and as a result, the filter body is sequentially and rapidly blocked by dust.

 This is also true for a single basket.

As shown in FIG. 11, if the object 20.21 adheres to the filter, it is blocked by the object 20.21. The water flow of b does not occur, and only the flow of ha comes to exist. As a result, the filter is completely closed, and the water flow stops flowing from the filter, so that the next inflowing object does not adhere to the filter.

Further, among the above-mentioned conventional devices, the latter device is composed of a basket having a structure in which bars are provided at substantially equal pitches over the entire upstream surface of the mesh as a filter.
In this case, a relatively large lump is first blocked by a row of bars located on the upstream side, and relatively fine dust that has passed through the row of bars is captured by a net at a later stage. There is an advantage that it is less likely to be clogged than the case of only the net body as a catch, but in the case of a bar row of the same height, the dust blocking surface will eventually constitute a plane, and it will be easily closed with large lump of dust as well There are drawbacks.

The present invention has been made in view of the above-mentioned problems of the prior art, and the purpose of the present invention is to filter even if thin and flat dust such as jellyfish or vinyl flows into a basket. A large amount of garbage can be treated with a high capacity by preventing it from adhering uniformly to the inner surface of the body in a planar manner. However, an object of the present invention is to provide a traveling screen capable of securing a necessary and sufficient water-passing surface.

[Means for Solving the Problems] In order to achieve the above object, the traveling screen in the present invention comprises a plurality of continuous baskets provided with a filter body comprising a crossbar or a filter mesh on the back surface, which is provided from an underwater part to a water part. In the dust removing device that is provided on the endless chain so as to move to the end, and the dust is scooped up in each basket by the feeding drive of the endless chain and is discharged above the water, on the upstream side of the basket and on the inner surface of the filter body At the contact position, a wavy screen is provided in which wavy bars whose leading edges are wavy are arranged at required intervals.

The corrugated screen is formed by vertically arranging a plurality of corrugated bars having different waveform shapes, crest heights, and crest pitches.

[Operation] Referring to FIG.
When the endless chain 1 stretched between 1.12 is driven forward,
Each upstream basket attached to an endless chain 2.2
… With the chain move up from the water to the top of the water one after another to scoop up jellyfish and other dust floating in the water. It is discharged into the groove 14.

The refuse flowing into the basket 2 is received by the filter 3.3 'formed of a net or a crossbar.
3 'is provided with a wavy screen 4 in which wavy bars are vertically arranged on its inner surface, so that a thin and flat object 22 such as jellyfish or vinyl has a height as shown in FIG. Three-dimensionally caught in different wavy or uneven parts,
Furthermore, it is captured so as to overlap on it in a different direction.

Therefore, even if a considerable amount of refuse adheres to the multi-layer as a result, water S ₁ . S ₂ … is secured.

In addition, as shown in FIG. 7, when rod-like dust enters the basket 2, there are various kinds of things such as an object 23, a vertical one as an object 23, and a horizontal one as an object 24. Object 25 that has flowed in from
And the vinyl piece 26 attached to the object is moved. Therefore, as a result, even if a large amount of dust including rod-shaped objects flows in and adheres in a stacked manner, a required water-passing surface is secured.

Embodiment FIG. 1 shows a case where the present invention is applied to a traveling screen.

In the figure, an endless chain 1 is stretched between an upper sprocket 11 pivotally supported on a pedestal 15 above the water and a lower sprocket 12 pivotally supported on the underwater bottom so that two strips are located on both sides of the water channel. Is driven forward in the direction of arrow 16 at a constant speed.

The basket 2 is mounted between the left and right endless chains so that the upper and lower ones are in contact with each other and are continuous.

At the back of the basket 2, a filter body 3.3 'made up of a cross bar or a filter net is provided, and a shelf 5 is provided at the lower part of the basket 2 with a forward upward inclination.

2 and 3 show a case where a corrugated screen 4 is provided on the inner surface of a filter body 3 composed of a cross bar. FIGS. 4 and 5 show a corrugated screen on a filter body 3 'constituted by a filter net. 4 is provided.

The corrugated screen 4 is formed by vertically arranging plate-shaped corrugated bars having different corrugated shapes and different wave heights at predetermined intervals on the inner surface of the filter body 3.3 '. Also, instead of the waveform, irregularities having different heights and pitches can be formed on the leading edge of the bar.

In addition, the plate-shaped corrugated bars may be at a fixed interval or may be at a slightly different interval.

Further, not only the waveform shape and the wave height but also those having different plate thicknesses or wave height pitches are used.

If the wave bars having different wave shapes are arranged vertically and fixed one by one as described above, dust coming in at the apex portion of the wave will be received, so that the dust filter does not become planar with respect to the dust filter, It becomes a very complicated way of attachment.

Therefore, even if a considerable amount of garbage is deposited on the multiple layers, the minimum required water flow surface is secured. As a result of the inflow and outflow of garbage-containing water through the water flow surface, the value of the average attachment height t of garbage can be dramatically increased, thereby increasing the amount of garbage disposal Q.

Q = t × B × V B = Inner width of shelf V = Rising speed of filter (basket) The present inventors have confirmed this fact by hydraulic experiments. As garbage (object) that flows in, konjac with a thickness of 35 mm was used.

In the above experiment, when a non-corrugated bar of different heights was vertically arranged and a wire mesh was installed as a filter (A), the non-corrugated bars of the same height were arranged vertically and the filter was When a wire mesh was installed as (C) and a filter using a wavy screen having different heights and a crossbar of the present invention (B) was used, the results were as shown in the graph of FIG. was gotten.

In an experiment using gloves (work gloves) as a simulated object of incoming dust, the results shown in Fig. 13 were obtained. In the same figure, (A) shows vertical bars of non-waveform bars with different heights.
(B) shows a case where a filter made of a wave screen having a different height and a wire mesh according to the present invention are used.

Although the present invention has been described with reference to the traveling screen according to the embodiment, the present invention can also be practiced with a drum type screen configured by disposing a filter on a disk or in a cylindrical shape.

As shown in FIGS. 2 to 5, the wavy screen 4 may be provided in parallel with the vertical direction of the basket frame, or may be provided in the horizontal direction perpendicular to the vertical direction.

[Effects of the Invention] In the present invention, as described above, a corrugated screen formed by arranging corrugated bars having a corrugated tip at required intervals is provided on the front surface of the filter body composed of a cross bar or a filter net, so that the filter is thin and flat. Even if dust containing objects such as loose pieces and vinyl pieces flows into the filter, the dust does not adhere to the filter so as to uniformly adhere to the filter body, so that a large amount of dust can be captured in a capacity. Therefore, a water level difference is hardly generated for the same amount of dust, and a large amount of dust can be treated with the same water level difference.
Also, the wavy screen is made up of a plurality of wavy bars with different waveform shapes, wave heights, and wave height pitches arranged vertically, and there is a gap in the dust that inflows and adheres in a very complicated manner. Therefore, even if a large amount of dust adheres, it is possible to secure an appropriate water passage surface. The wavy screen is
Adjacent corrugated bars have a wavy shape and are not at the same height but have steps, so even for dust larger than the bar pitch, the blocking area for the filter can be reduced, and as a result And the water level difference is also reduced. In addition, the configuration is simple, more realistic in terms of manufacturing cost, it can be provided at low cost, and implementation is easy.

[Brief description of the drawings]

1 is a side view of the entire traveling screen embodying the present invention, FIG. 2 is a partially enlarged plan view of a basket portion of the first embodiment of the present invention, FIG. 3 is a longitudinal side view of the basket, FIG. FIG. 5 is a partially enlarged plan view of a basket portion of the second embodiment of the present invention, FIG. 5 is a vertical sectional side view of the basket, FIG. 6 and FIG. FIG. 8, FIG. 8 is a perspective view showing a part of a corrugated screen, FIG. 9 is a perspective view showing a part of a crossbar, FIG.
FIGS. 10 (a), (b) and (c) are schematic views showing the state of attachment of refuse, FIG. 11 is a longitudinal sectional side view of a conventional basket, and FIGS. 12 and 13 are comparison graphs. 1 ... Endless chain, 2 ... Basket 3.3 '... Filter, 4 ... Wave screen

Claims (2)

(57) [Scope of request for utility model registration] 1. A large number of continuous baskets provided with a filter body 3 (or 3 ') consisting of a crossbar or a filter mesh on the back.
Are provided on the endless chain 1 so as to move from the underwater part to the upper part of the water. Said basket 2.2
And a corrugated screen 4 formed by arranging corrugated bars whose corrugated edges are arranged at required intervals at a position upstream of and in contact with the inner surface of the filter body 3 (or 3 '). Traveling screen. 2. The traveling screen according to claim 1, wherein the corrugated screen is formed by vertically arranging a plurality of corrugated bars having different waveform shapes, crest heights and crest pitches.