JPH11324101A - Underwater impurity collecting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water passage installation type impurities collecting device in which a screen is strengthened, durability is improved, water flow resistance is reduced to clear the passage, and impurities can be surely collected into a crusher without entwining the screen and stagnating on the front of the screen. SOLUTION: This collecting device is constituted of a fixed type bridge-like screen, and a rake shaft 10 fixedly securing a rake group R1 , R2 , R3 rotating between partitions of the screen, the rake shaft 10 is installed eccentrically from the center of the outer circumferential edge of the above-mentioned screen by ε, the extreme end parts of the rakes are projected and retreated from the outer circumferential edge of the screen to scrape up impurities caught with the screen and collect them into a crusher 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for guiding foreign substances, such as empty cans, plastic containers, and wood chips, flowing down into sewage or tap water to a crusher installed in the waterway. Regarding the foreign matter collection and crushing device that crushes finely in water and prevents accidents such as damage and clogging of pumps etc.
More specifically, the present invention relates to a screen device for guiding foreign substances to a crusher.

[0002]

2. Description of the Related Art When foreign substances such as empty cans, plastic containers, and wood chips flow into a sewage treatment facility together with sewage, they cause accidents such as clogging and breakage of piping in the facility and pumps.
Conventionally, a device disclosed in Japanese Patent Publication No. 7-85781 has been developed as a device for preventing such an accident. As shown in FIG. 9, the apparatus has an open mesh screen having an endless loop shape and a crusher 1 in a sewer.
The trapping of impurities in the sewage with an open-end mesh screen having an endless loop shape is carried into the crusher 1, where the crusher is finely crushed and dispersed in the sewage. is there.

The above-mentioned conventional apparatus has the following problems. (1) Since the screen portion is made of a flexible material such as polyethylene and nylon in terms of rotating and moving the mesh screen, the screen portion cannot be made strong and is easily damaged, resulting in poor durability. (2) Since the screen is a rotating belt type, the screen is doubled to increase the water flow resistance and prevent the passage of sewage. (3) Since the screen is a belt surface netted in a net shape, foreign substances are easily entangled by the unevenness, and once entangled, it is difficult to loosen.

[0004] In order to solve the above problems, the applicant has devised an apparatus disclosed in Japanese Patent Application Laid-Open No. Hei 8-226165. In this apparatus, as shown in FIG. 10, a fixed bar screen is installed obliquely in a water channel, a crusher is installed at the downstream end of the screen, and a rear side of the screen is located near the crusher. A scraper is installed, and contaminants flowing down to the crusher along the bar screen are sent to the crusher by the scraper at the end of the screen. However,
In this device, when the water flow is fast, the component force in the water flow direction becomes excessively large than the component force for moving the foreign substances along the bar screen, and the foreign substances are pressed against the bar screen and cannot move along the bar screen and stay there. There was a problem of doing.

[0005]

Accordingly, the present invention solves the above-mentioned problems of the prior art, strengthens the screen, improves durability, reduces water flow resistance, improves the flow of water, and reduces contamination. It is an object of the present invention to provide a waterway-installed contaminant collection device that can collect a material in a crusher without entanglement with a screen or staying on the front of the screen.

[0006]

Means for Solving the Problems A fixed bar screen and a rake shaft for fixing a rake group rotating between the eyes of the screen are provided. The rake shaft is eccentrically mounted on the center of the outer peripheral edge of the screen. The rake tip is protruded from the outer peripheral edge of the screen, and the foreign substances trapped on the screen are scraped and collected by the crusher.

[0007]

Next, an embodiment of the present invention will be described with reference to FIGS. In FIG.
Reference numeral 1 denotes a well-known, for example, two-shaft rotor crusher, which is juxtaposed in the water channel W close to the oblique rear position of the screen device 2. The screen device 2 is provided on a screen frame F having a structure in which three channel-shaped columns 4, 4, 4 are erected on the upper surface of a short cylindrical base 3 at circumferential intervals (FIGS. 4, 5).
(See FIG. 6 (see FIG. 6 (a)). a))
Are sequentially laminated with the collar 7 interposed therebetween, and these are integrally fastened with tie rods 8, 8, 8 (see FIG. 2), and the screen laminate is fixed to the columns 4, 4 with lock bolts 9, 9 to form a cylinder. It forms a bar-shaped fixing screen (see FIGS. 1 and 2). In order to provide rigidity to the screen, an annular screen member 6 '(see FIG. 6 (b)) having no notch is provided instead of an arcuate screen member every few sheets.

Reference numeral 10 denotes a rake shaft. The lower end of the rake shaft is supported by a lower bearing box 12 installed on the machine frames 11 ₁ and 11 ₂ of the gantry 3. The upper end is connected to a drive shaft 14 via a flange coupling 13, and the drive shaft 14 is supported by an upper bearing box 16 installed on an upper lid 15 installed on the upper surface of the screen frame F. I have. And the drive shaft 14
Is connected to an output shaft of a motored reduction gear 19 installed on a reduction gear installation base 18 via a coupling 17. Reference numeral 20 denotes a mechanical seal, 21 denotes a ball bearing, 22 denotes an oil seal, 23 denotes an angular ball bearing, and 24 denotes a bearing retainer.

The rake shaft 10 is installed in the screen members 6, 6 'so as to be eccentric with respect to the center of the screen member, and the rake shaft 10 is provided with the rake R. The rake R is an upper rake group R as shown in FIG.
_1, middle rake group R _2, is composed of a lower rake group R _3, each rake group (the illustrated ones rake single piece 11 sheets) a boss with rake single piece 25 united with three through bolts 26 The mounting angle of each rake group is shifted to the rake shaft 10 by set screws 27, 27 (R ₁ , R ₂ , R ₃ are each shifted by 120 degrees in the illustrated example) and fixed, and each rake single piece 25 is fixed. The arc-shaped screen member 6 and the annular screen member 6 'are located between them. 28, 28 are spacers inserted between each rake group.

The rake shaft 10 is connected to the screen member 6,
Installed eccentrically with the center of 6 ', rake tip 1
Are drawn inward from the outer peripheral edges of the screen members 6 and 6 ', and are protruded outward from the outer peripheral edges of the screen members 6 and 6' from a position rotated by 180 degrees and rotated.

Reference numerals 29, 29 denote stationary guides for the cylindrical cross screen which are installed at predetermined locations in the water channel. The upper portion of the screen frame F is connected to the upper end of the guide by mounting bolts 30. The lower part of the body F is in contact with the lower part of the guide. Reference numerals 31, 31 denote locking plates of the screen frame F mounted on the outer wall side of the guides 29, 29. When the cylindrical cross screen is installed, the screen is installed such that the cutout (the hatched portion in FIG. 1) of the arcuate screen member is located on the downstream side. 32 is a water flow guide installed on the upstream side of the screen device, 33 is a water flow guide provided at the entrance of the crusher, and 34 is a scraper.

The present invention has the above structure, and the clean water or sewage flowing down the water channel W is supplied to the screen member 6,
After passing through 6 ', impurities in the water are removed from the screen members 6, 6'.
Is captured by Since the rake R rotates eccentrically with the screen member inside the screen members 6 and 6 ', the foreign substances are scraped toward the entrance of the crusher 1 while sliding on the outer peripheral surface of the screen member at the leading end of the rake R. In the vicinity of the entrance of the crusher, the leading end of the rake is retracted into the screen member 6 and separated from impurities. Then, the contaminants are introduced into the crusher 1 by flowing water along the scraper 34. The foreign matter that has entered the inside of the screen member 6 flows out of the screen from the cutout portion without staying inside the screen.

[0013]

According to the present invention, since the screen members are laminated on the crosspiece, the strength can be maintained, and each rake single piece 25 rotates between the screen members 6 and 6. Then, the contaminants trapped on the screen are reliably scraped toward the crusher 1 while sliding on the outer peripheral surface of the screen member at the tip of the rake. Further, by providing the cutout portion on the downstream side of the screen, it is possible to prevent foreign substances from staying inside the screen and to reduce the inflow resistance of the screen. Further, by mounting the respective rake groups at an angle shifted from each other with respect to the rake shaft 10, it is possible to reduce the power for scraping contaminants.

[Brief description of the drawings]

FIG. 1 is a cross-sectional plan view showing a use state of the device of the present invention.

FIG. 2 is a longitudinal sectional view of the device of the present invention.

FIG. 3 is a view as viewed in the direction of arrows AA in FIG. 1;

FIG. 4 is a vertical sectional view taken along the line BB of FIG. 5 showing the screen frame.

FIG. 5 is a cross-sectional plan view taken along the line CC of FIG. 4;

FIG. 6 is a plan view of a screen.

FIG. 7 is a rake assembly diagram.

FIG. 8 is an explanatory view of a rake, and (a) is a plan view of a single rake.
(B) is an explanatory view of a rake group.

FIG. 9 is an explanatory view of a conventional device.

FIG. 10 is an explanatory view of another conventional device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Crusher 2 Screen device 3 Stand 4 4 Prop 5 Engagement piece 6 Arc-shaped screen member 6 'Annular screen member 7 Collar 8 Tie rod 9 Lock bolt 10 Rake shaft 11 ₁ and 11 ₂ Machine frame 12 Lower bearing box 13 Flange cup Ring 14 Drive shaft 15 Upper lid 16 Upper bearing box 17 Coupling 18 Reduction gear mounting base 19 Reduction gear with motor 20 Mechanical seal 21 Ball bearing 23 Angular ball bearing 24 Bearing holder 25 Rake single piece 26 Through bolt 27 Set screw 28 Spacer 29 Installation guide 30 Mounting bolt 31 Lock plate 32 Water flow guide 33 Water flow guide 34 Scraper F Screen frame R Rake R ₁ Upper rake group R ₂ Middle rake group R ₃ Lower rake group W Waterway

Claims (3)

[Claims] 1. A device for arranging a screen device and a crusher installed on one side of the screen device across a water channel to collect contaminants in water into the crusher, wherein the screen device is a fixed type. A bar-shaped screen and a rake shaft fixing a rake group rotating between the eyes of the screen,
The rake shaft is installed eccentrically with the center of the outer peripheral edge of the screen, and the leading end of the rake protrudes and disappears from the outer peripheral edge of the screen to scrape impurities collected on the screen and collect them in the crusher. Equipment for collecting contaminants in water. 2. The underwater foreign matter collection device according to claim 1, wherein the fixed type cross screen is formed by laminating arc-shaped screen members at intervals and setting the cutout portion toward the downstream side. . 3. The apparatus for collecting contaminants in water according to claim 1, wherein each rake group attached to the rake shaft is attached at an angle to each other.