JPH0333849B2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to bar rotating screens.

[Conventional technology]

Power plants, LNG terminals, water purification plants, etc. take in large amounts of seawater and river water, but the dust in the water can be a hindrance to these facilities. There is a bar rotating screen.

In this type of bar rotating screen, as shown in the side view of Fig. 4, a carrier is installed between the foot sprocket 01 immersed in the water of the intake channel and the head sprocket 02 disposed above the water surface. A chain 03 is run endlessly, baskets 04 each having a vertically elongated slit-shaped filter body made of bar rack are arranged at appropriate intervals in the carrier chain 03, and a head sprocket 02 is driven by a motor 05.

Then, the basket 04 catches the garbage in the intake channel and rises, and when it is reversed by the head sprocket 02, the garbage caught by the basket falls naturally and is collected in the garbage trough 07 via the fixed chute 06.

However, if the debris sticks in a wedge shape between the barracks of the basket, the debris will not fall down by itself even when the head sprocket is turned over, but will descend along with the carrier chain and enter the water again. A part of the dust is applied with a force in the opposite direction to the rising force due to the water flow in the intake channel, and it comes off the bar rack and flows into the secondary side of the dust remover, and the remaining part of the dust stays between the bars and is returned again. As the water rises, the dust removal function deteriorates, and after long-term operation, there is a risk that shellfish will grow attached to the barracks, blocking the gaps in the barracks and causing water flow problems.

Therefore, in order to solve this problem, as shown in Utility Model Publication No. 55-2097, a large number of bar plates were protruded in parallel from the outer periphery of the torque tube fixed between a pair of left and right head sprockets. The mounting interval is the same as that of the bar racks on the basket, but they are mounted at positions shifted by half a pitch from each other, and when the basket is reversed along the torque tube, the bar plate penetrates between the bar racks, and the bar racks A method has also been proposed in which the garbage stuck in the gaps is separated and collected into a garbage trough.

[Problem that the invention seeks to solve]

However, such means requires a large number of bar plates to be protruded from the torque tube, resulting in a complicated structure and an increased cost.

The present invention was proposed in view of the above circumstances, and has a simple structure that eliminates the clogging of the basket bar rack with dust and improves dust removal performance without using a head sprocket with a complicated structure. The purpose of the present invention is to provide a bar rotating screen that can be used for various purposes.

[Means for solving problems]

To this end, the present invention provides an endless carrier chain that extends between a lower sprocket immersed in water and an upper sprocket that is disposed above the water surface, and that a plurality of baskets are installed along the endless carrier chain, and the baskets are captured by the rising baskets. In the bar rotary screen, the waste is dropped when the basket is reversed by the upper sprocket and collected in a waste trough, and the basket is made up of a plurality of vertical straight bar racks arranged in parallel at the same pitch. A rectangular back surface, a curved bottom surface consisting of the same number of vertical arc-shaped barracks arranged in parallel at the same pitch, a flat end plate that closes the left and right ends of the back surface and the bottom surface, respectively, and a flat end plate extending from the upper end of the front part of the bottom surface to the back surface. It is formed by a basket consisting of rectangular support plates of the same length that extend approximately parallel to each other, and the bar racks on the bottom of the preceding basket and the bar racks on the back of the succeeding basket are adjacent to each other so that they temporarily penetrate into each other when the upper sprocket is turned over. It is characterized by the basket bars being shifted by half a pitch from each other.

[Effect]

With this configuration, when the vertically adjacent baskets are reversed, the bar racks in the upper basket penetrate into the bar racks in the lower basket, and the garbage that has gotten between the bars is separated from the bar racks.
The garbage can fall from the basket and be collected in the garbage trough without leaving any residue behind.

〔Example〕

An embodiment of the present invention will be explained with reference to the drawings.
FIG. 1 is a partial side view showing the vicinity of the head sprocket, FIG. 2 is a partial front view taken along - in FIG. 1, and FIG. 3 is a perspective view showing the basket in FIG. 1.

In the above figure, the same symbols as in FIG. 4 indicate the same members as in the same figure, and 1 is a basket according to the present invention, 2, 3, and 4 are equal length horizontal upper frames, middle frames, and lower frames parallel to each other. flame,
5, 5 is a pair of trapezoidal left and right upper end plates fixed to both ends of the upper frame 2, middle frame 3, and lower frame 4, respectively; 6 is a rectangular saucer plate, the long side of which is connected to the lower frame 4; The left and right short sides are fixed to the front end of the upper end plate.

Reference numerals 7, 7 denote a pair of semicircular left and right lower end plates, which are fixed on the same plane inside the respective bar racks at both left and right ends of the lower bar rack.

8 are horizontally arranged side by side at the same pitch, and the upper and lower ends are fixed to the upper frame 2 and the middle frame 3, respectively, and the baskets 8 have a structure in which they are inserted through the back opening of the basket formed by the upper frame 2, the middle frame 3, and the upper end plate 5. A plurality of upper bar racks 9 are semicircular arc-shaped lower bar racks having the same radius as the lower end plate 7, and are arranged laterally in parallel at the same pitch as the upper bar racks 8, and their front and rear ends are connected to the lower frame 3, Although it is fixed to the middle frame 4, the lower bar rack 9 is disposed laterally shifted by half a pitch with respect to the upper bar rack 8.

In such a device, as shown in FIG. 1, when the head sprocket 02 rotates clockwise, each basket is attached to the carrier chain closely adjacent to each other, so that upon reversal,
The lower bar rack 9 of the upper basket passes through the upper bar rack 8 of the lower basket and enters into the other basket.

Therefore, the upper bar rack 8, the lower bar rack 9
The garbage 10 that has bitten into each of the baskets is forcibly separated from the bar rack and becomes free, so that after the basket is turned over, the garbage does not remain in the basket and all falls into the garbage trough.

In the above embodiment, instead of having the upper bar rack and lower bar rack shifted by half a pitch, two types of baskets with longitudinal bar racks shifted by half a pitch from each other may be alternately arranged in the carrier chain, or the same basket may be arranged. Baskets of structures can also be arranged in a carrier chain with alternating half-pitch offsets.

〔Effect of the invention〕

In either case, when the upper and lower baskets are reversed, their bars intersect with each other, and clogging of the bars with dirt is completely removed. Therefore, special means for preventing clogging is required. For example, there is no need to attach a torque tube or bar plate, and the conventional head sprocket can be used as is.

In short, according to the present invention, an endless carrier chain is routed between a lower sprocket immersed in water and an upper sprocket disposed above the water surface.
A bar rotating screen in which a plurality of baskets are installed along the endless carrier chain, and the garbage captured by the ascending baskets is dropped and collected in a garbage trough when the baskets are reversed by the upper sprocket, The basket has a rectangular back surface made of a plurality of vertical straight bar racks arranged in parallel at the same pitch, a curved bottom surface made of the same number of vertical arc-shaped bar racks arranged in parallel at the same pitch, and the left and right ends of the back surface and the bottom are respectively closed. The basket is formed by a flat end plate and a rectangular receiving plate of the same length extending from the upper end of the front part of the bottom surface and extending substantially parallel to the back surface,
By shifting the barracks of adjacent baskets by half a pitch so that the barracks on the bottom of the leading basket and the barracks on the back of the following basket temporarily penetrate into each other when the upper sprocket turns over, the head sprocket has a complex structure. The present invention is extremely useful industrially because it provides a bar-rotating screen that removes clogging of the bar rack of a basket with dust and improves dust removal performance with a simple structure without using the bar rack.

[Brief explanation of drawings]

FIG. 1 is a partial side view showing the vicinity of a head sprocket according to an embodiment of the present invention, and FIG.
FIG. 3 is a perspective view of the basket of FIG. 1; FIG. 4 is an overall side view showing a known bar rotating screen. 1, 1, 1...basket, 2...upper frame, 3...middle frame, 4...lower frame,
5, 5... upper end plate, 6... saucer plate,
7... Lower end plate, 8... Upper bar rack, 9... Lower bar rack, 10... Garbage, 01
...Foot sprocket, 02...Head sprocket, 03...Carry chain, 04...Basket, 05...Motor, 06...Fixed chute, 07...Garbage trough.

Claims (1)

[Claims] 1. An endless carrier chain is routed between a lower sprocket immersed in water and an upper sprocket placed above the water surface, a plurality of baskets are attached along the endless carrier chain, and the garbage captured by the rising baskets is transferred to the upper sprocket. In the bar rotary screen, which is dropped when the basket is reversed on a sprocket and collected in a garbage trough, the above-mentioned basket has a rectangular back surface consisting of a plurality of vertical straight bar racks arranged in parallel at the same pitch, A curved bottom surface consisting of the same number of vertical arc-shaped bar racks arranged in parallel, a flat end plate that closes the back surface and the left and right ends of the bottom surface, respectively, and a flat end plate that extends to the upper end of the front part of the bottom surface and extends approximately parallel to the back surface. The basket is formed of a rectangular receiving plate extending with the same length, and the bar racks of adjacent baskets are arranged so that the bar racks on the bottom of the preceding basket and the bar racks on the back side of the succeeding basket temporarily penetrate each other when the basket is reversed by the upper sprocket. A rotating bar screen characterized by being offset by half a pitch from each other.