JPH01290812A - Automatic dust removing device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an automatic polishing device, and more particularly to an automatic polishing device having one or more rakes with the upstream side portions of the rakes bent toward the chain traveling direction. Regarding craftsmanship.

[Conventional technology]

As a conventional automatic dust removal device of this type, one having a structure shown in FIG. 3 is known. That is, since the automatic polishing device is used for scraping up inflowing coarse matter, the inflow water level is always set above the front screen 2 disposed upstream of the screen 1. Further, an endless chain 3 is arranged around the outer periphery of the screen 1, and rakes 4 are attached to the chain 3 at regular intervals. The rake 4 is used to scrape up screen debris 5 adhering to the screen 1 or the front screen 2.

[Problem that the invention seeks to solve]

By the way, in the conventional self-cleaning device configured as described above, the rake 4 is arranged at right angles to the direction of movement of the chain 3, so the inflow water level is as shown in Fig. 3. As shown, when the water level has dropped to near the front screen 2, screen debris 5 such as styrofoam, cans, vinyl, etc. floating on the water surface 6a of the waterway 6 will drop to the water surface 6.
It will not be placed on the rake 4 which is tilted on top a, but will be pushed upstream. For this reason, the front screen 2
There was a drawback that the screen scum 5 could not survive on the upstream side of the screen, leaving the screen residue 5 in a floating state.

SUMMARY OF THE INVENTION An object of the present invention has been made in view of the above-mentioned drawbacks, and it is an object of the present invention to provide an automatic dust removal device that can reliably scrape up screen debris floating on the water surface even at low water levels.

[Means for solving problems]

The automatic dust removal device according to the present invention has a configuration in which at least one upstream side portion of rakes attached to a chain at regular intervals is bent in the direction of chain movement.

[Effect]

As described above, in the present invention, since the upstream side portion of at least one rake is bent in the chain traveling direction,
The bent portion makes it possible to scrape up screen debris floating on the water surface despite the low water level.

〔Example〕

Hereinafter, the present invention will be explained in detail using embodiments shown in the drawings.

FIG. 1 is a schematic configuration diagram showing an embodiment of an automatic dust removal device according to the present invention, and FIG. 2 is an explanatory diagram of the operation of the automatic dust removal device. A screen 11 and a front screen 12 are arranged substantially perpendicular to the water flow direction in the waterway 10. Front screen 1
2 is installed and fixed on the water channel bottom 13 so as to be located upstream of the screen 11. In addition, the screen 12
A chain 14 is disposed endlessly around the outer periphery of the chain.

That is, a lower sprocket 15 is arranged on the bottom side of the water channel 10, and a driving sprocket 16, a tail sprocket 17, and an idler sprocket 18 are arranged above the water channel 10, and each of these sprockets 15 to 18 has a The chain 14 is arranged in an endless manner.

The chain 14 has a plurality of rails b bent at regular intervals in the chain's traveling direction, and is formed into an "H" shape. On the other hand, an apron 20 is arranged above the screen 11 along the trajectory of the chain 14, and a carry-out machine 22 for carrying out the screen scraps 21 is arranged below the tail sprocket 17.

In the above configuration, even if the inflow water level drops from the position shown in FIG. 1 to the position shown in FIG. 2, that is, near the front screen 12, the upstream side of the rake 19a 119b is flush with the water surface 23 or has a reverse slope with the tip of the upstream side portion 19b slightly protruding from the water surface 23, so that the screen debris 21 floating on the water surface 23 is The rake 1
It is reliably placed on the upstream side 19b of 9a and raked up.

In the above-described embodiment, only one of the plurality of rakes 19 is bent into a "F" shape, but it is of course not limited to one. Also,
The bent shape of the rake 19a is not limited to the "H" shape, but any shape can be used as long as the rake can scrape up screen debris even at a low water level.

〔Effect of the invention〕

As explained above, according to the automatic blood removal device according to the present invention, since the upstream side of at least one rake is bent in the chain traveling direction, screen dregs can be placed on the rake even at a low water level. It has the effect that it can be placed on the ground and stirred up reliably.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram showing an embodiment of an automatic dust removal device according to the present invention, FIG. 2 is an explanatory diagram of the operation of the automatic dust removal device, and FIG.
The figure is a partially schematic configuration diagram showing an example of a conventional automatic dust removal device. 10... waterway, 11... screen, 12
...Front screen, 14...Chain, 1
9.19a...Rake, 19b...Upstream side part. Applicant Hitachi Plant Construction Co., Ltd.

Claims (1)

[Claims] A screen arranged approximately perpendicular to the direction of water flow in the waterway;
A front screen disposed on the upstream side of the screen, a chain disposed endlessly around the outer periphery of the screen, and rakes attached to the chain at regular intervals. An automatic dust remover for scraping up adhering screen scum, characterized in that the upstream side of at least one rake is bent in the direction of chain movement.