JPS587010A

JPS587010A - Improvement of screen dust remover with rake

Info

Publication number: JPS587010A
Application number: JP56106070A
Authority: JP
Inventors: Kozo Nomura; 幸三野村
Original assignee: Individual
Current assignee: Individual
Priority date: 1981-07-07
Filing date: 1981-07-07
Publication date: 1983-01-14

Abstract

PURPOSE:To reliably remove dust gathering at a lower part of a screen, by a method wherein an axial center of a support axis of a lower sprocket is positioned in a lower level than that of a riverbed surface, a lower end part of a front screen is bent frontward in a L-shape, the bending part is positioned in the same level as that of the riverbed surface. CONSTITUTION:If, with a dust remover M actuated, an endless chain 5 is driven through the working of an upper sprocket and a lower sprocket 4, a total surface of a rake plate 6 of a rake 8 works perfectly effectively in a position where the rake plate is located in an equivalent level to that of a riverbed surface 11, and no dead angle to the rake is formed, whereby dust collecting at lower parts of the fronts of screens 1 and 2 is reliably raked up. A strong water current shown in an arrow mark is produced in a space 14, and this eliminates the possibility for dust to stay at an upper surface of a bending part 2a of the front screen 2, whereby dust 13 is prevented from gathering at the bending part 2a and accumulating in a cone, and the dust-removing capacity of the screens 1 and 2 is improved.

Description

【発明の詳細な説明】この発明は、水力発電所や農業用水等の取水口及び上下
水道の集排水口に設電される掻揚レーキ付きスクリーン
除塵装置の改良に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a screen dust removal device with a scraping rake installed at water intakes for hydroelectric power plants, agricultural water, etc., and water and sewage collection and drainage outlets.

周知のように、此の種のスクリーン除塵装置は、第２図
図示の如く主スクリーン（１）の下部にこれと重合連接
する前面スクリーン（２）を有し、また前記スクリーン
に引掛かった塵を除去するため、主スクリーン（１）の
後部に、無端チェーン（５）の回動により各格子板（７
）間の間隙に沿って掻板（６）を上昇させる掻揚レーキ
（８）を附設しであるが、従来のスクリーン除塵装置−
け、河床面（ロ）に掻揚レーキ（８）の掻板（６）が接
触しないように水中に設置されている関係上、無端チェ
ーン（５）を回動する上下スプロケット（図面では下部
スプロケットのみを一図示）のうち、下部スプロケット
（４）の支軸（９）の軸心（２）が河床面Ｑηよシも高
い位置にあり、そのため、スフ１７−ンの下部Ｋ、塵の
掻揚が困難な死角が出来、仁の部分の前方にｍｏａが溜
まって次第に高く山形に堆積し、除塵能力の低下を招く
恐れがあり、その影響は低水位の水路はど大きく顕著な
ので、このような問題点を何等かの技術手段によって解
消することが切望されていた。As is well known, this type of screen dust removal device has a front screen (2) at the bottom of the main screen (1) which is connected to the main screen (1) as shown in FIG. In order to remove the lattice plates, each grid plate (7
) is equipped with a scraping rake (8) that raises the scraping plate (6) along the gap between
Since the rake rake (8) is installed underwater so that the rake plate (6) does not come into contact with the river bed surface (b), the upper and lower sprockets (lower sprocket in the drawing) that rotate the endless chain (5) The axis (2) of the support shaft (9) of the lower sprocket (4) is located at a higher position than the river bed level Qη. A blind spot is created where it is difficult to remove the dust, and moa accumulates in front of the grain part and gradually accumulates in a mountain shape, leading to a decrease in the dust removal ability. There was a strong desire to solve these problems by some technical means.

本発明者は、この点について従来の技術常識に拘束され
ることなく鋭意研究を重ねた結果、前面スクリーンの一
部を改良し且つ装置の設置条件を変えるだけの簡単な構
造により、前記の問題点を全く一挙に解決することに成
功したものである。As a result of intensive research on this point without being constrained by conventional technical common sense, the inventor of the present invention has solved the above-mentioned problem with a simple structure that only improves a part of the front screen and changes the installation conditions of the device. It succeeded in resolving all the issues all at once.

以下、この発明を実施例の図面について具体的に説明す
ると、図面中の符号（１）はスクリーン除塵装置−の主
スクリーン、（２）は主スクリーン（１）の下部に重合
連接して設けた前面スクリーンで、両スクリーン（１）
　（２）を支持するフレーム（３）には、上下一対のス
ｆｕケット（図面では下部スプロケット（４）のみを図
示）で無端チェーン（５）を回動し、掻板（６）をスク
リーンの各格子板（ｆｆｉ間の間ＩＩＫ沿って上昇させ
る掻揚レーキ（８）が設けられておシ、この点は従来の
スクリーン除塵装置−と基本的に変シないが、本発明の
スクリーン除塵装置（財）では、第１図図示の如く、下
部スプロクツ）（４）の支軸（９）の軸心に）が少なく
とも河床面（ロ）よりも低く位置するように河床（６）
を段状に堀シ下げて主スクリーン（１）及び掻揚レーキ
（８）を設置すると共に１前面スクリーン（２）の下端
部を前方に向かってＬ字形に折曲し、その折曲部（！Ｊ
）を河床面（ロ）と同じ高さに合致せしめたことを特徴
とするものである。Hereinafter, this invention will be specifically explained with reference to the drawings of the embodiments. In the drawings, reference numeral (1) is the main screen of the screen dust removal device, and reference numeral (2) is the main screen that is connected to the lower part of the main screen (1). On the front screen, both screens (1)
The frame (3) that supports the screen (2) has a pair of upper and lower sprockets (only the lower sprocket (4) is shown in the drawing) that rotates the endless chain (5) to move the scraper (6) to the screen. A scraping rake (8) is provided which is raised along IIK between each grid plate (ffi).This point is basically the same as the conventional screen dust remover, but the screen dust remover of the present invention As shown in Figure 1, the riverbed (6) is placed so that the axis of the support shaft (9) of the lower sprocket (4) is located at least lower than the riverbed level (b).
The main screen (1) and raking rake (8) are installed by lowering the trench in steps, and the lower end of the front screen (2) is bent forward into an L-shape, and the bent part ( !J
) is at the same height as the riverbed level (b).

本発明によるスクリーン除塵装置輔は上記構造を有する
ので、除幽作動時に、掻揚レーキ（８）の掻板（６）は
、河床面（１１と同じ高さの位置に於いて掻板（６）の
全面が１００％有効に働き、掻揚レーキ（８）に死角が
生じないため、スクリーン（１）　（２）前面の下１１
に堆積する塵を確実に掻き王けて排除することが出来、
また前ＷＪスクリーン（２）の下端部は前方に向かつて
Ｌ字形に折曲し、然かも折曲部−）の下方には河床（２
）を段状に堀シ下げた空間（ロ）が形成されているので
、この空間０４に矢印図示のような強い水流が生じ、前
面スクリーン（２）の折曲部（２））上面に塵が停滞す
る恐れがないため、この部分に塵（至）が溜まって山形
に堆積するような事がなく、スクリーンの除塵能力を飛
躍的に向上し得るので、これを水力発電所や農業用水等
の取水口及び上下水道の集排水口に設置すれば、装置の
構造が簡単で設備費が安価な事とも相俟って、正に最適
の使用効果を発揮するものである。Since the screen dust removal device according to the present invention has the above structure, during dust removal operation, the scraping plate (6) of the scraping rake (8) is placed at the same height as the riverbed surface (11). ) works 100% effectively and there are no blind spots on the raking rake (8), so the lower part of the screen (1) (2)
It is possible to reliably scrape out and eliminate the dust that accumulates on the
In addition, the lower end of the front WJ screen (2) is bent forward into an L-shape, and below the bent part is a riverbed (2
) is formed in a stepped manner, creating a space (b), so a strong water flow as shown by the arrow occurs in this space 04, causing dust to fall on the top surface of the bent part (2) of the front screen (2). Since there is no risk of stagnation, dust will not accumulate in this area and accumulate in a mountain shape, and the dust removal ability of the screen can be dramatically improved. When installed at water intakes and water and sewage collection and drainage outlets, the device has a simple structure and low equipment costs, and will provide optimal usage effects.

[Brief explanation of the drawing]

第１図は本発明による掻揚げレーキ付きスクリーン除−
装置の具体的な！ｌ！施構過構造例を示す要部の縦断面
図、第２図は従来の掻揚レーキ付きスクリーン除塵装置
を示す要部の縦断面図である。Figure 1 shows a screen removal system with a scraping rake according to the present invention.
Equipment specific! l! FIG. 2 is a longitudinal cross-sectional view of the main part showing an example of an over-configured structure, and FIG. 2 is a longitudinal cross-sectional view of the main part showing a conventional screen dust removal device with a scraping rake.

Claims

[Claims]

(1) A front screen is provided at the bottom of the main screen to overlap and connect with the main screen, and a raking rake is provided at the rear of the main screen to raise the raking board along the gap between each grid board by rotation of an endless chain. In the attached screen dust removal device, the main screen and In addition to installing a raking rake, the lower end of the front E11i screen is bent forward into a 5-shape, and the bent part is at the same height as the riverbed surface. Improvement of screen dust remover.