JPH0499Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a screen-type dust removal device that captures dirt flowing in a waterway with a screen and scrapes it up with a rake.

[Conventional technology]

Conventional screen-type dust removal equipment has a number of screens installed in a waterway, in which the lengths of the screen bars are aligned vertically and the screens are arranged in parallel with a predetermined width of gap in the horizontal direction. The structure is such that a rake with a cutting edge inserted therein is moved along the screen bar of the screen to scrape off dirt caught on the screen bar.

[Problem that the invention attempts to solve]

However, in the above-mentioned conventional screen-type dust removal device, debris flowing in the waterway, especially algae or similar debris, separates from the upstream edge of each screen bar to the left and right and gets entangled with both sides of the screen bar. When raking this up with a rake, there is a problem in that as the rake rises, the debris gets squeezed and piled up and gets caught between the screen bar and the cutting edge of the rake, increasing the operating resistance of the rake.

[Means for solving problems]

In order to solve the above-mentioned problems, the present invention has a screen in which a large number of screen bars are installed in parallel in parallel, with the lengths aligned in the vertical direction and with required horizontal gaps. Width of the gap between the horizontally adjacent screen bars in a screen-type dust removal device that scrapes off dust captured by the screen bar by moving a rake with a cutting edge inserted into the gap between the screen bars along the screen bar of the screen. , are formed alternately in large and small sizes.

[Effect]

Algae and other debris that have flowed down the waterway are uniformly caught on the upstream edges of each screen bar, unlike conventional methods, and instead of getting entangled on both sides of each screen bar, most of the debris is trapped in the gaps. It hooks on the upstream edges of two narrow screen bars at the same time, and splits into left and right sides, touching the left side of the left screen bar and the right side of the right screen bar.

Therefore, when the rake is moved along the screen bar, the above-mentioned debris is newly caught in the middle part by the rake's cutting edge, and is caught between the screen bar and the rake's cutting edge, causing the rake to move. This means that they can be accurately raked onto land without interfering with the flow of water.

〔Example〕

Figures 1 to 3 show an embodiment of the screen type dust removal device according to the present invention, and the reference numeral 1 in the figures shows an embodiment of the screen type dust removal device according to the present invention.
is a screen. This screen 1 consists of a large number of screen bars 2 arranged in parallel with each other using through bolts 4, with their lengths aligned in the vertical direction, and two types of gaps G and g, large and small, alternately opened in the lateral direction using spacers 3. It is fixed to the lower part of the frame 5 by a support girder 6. The frame 5 has its upper part supported on a pedestal 7 so as to be able to freely rotate up and down on a pivot 8, and is pulled by a winding device 10 of a wire rope 9 fixed to its lower end to be pulled from a waterway 11 by the two-dot chain line in FIG. It is designed so that it can be pulled upwards like this.

Sprocket wheels 12 and 13 are provided at the left and right, upper and lower ends of the frame 5, respectively, and endless chains 15 and 15 (see FIG. A number of rakes 16 (only two are shown in the figure) are installed horizontally between the chains 15, 15 at predetermined intervals. ing. The rake 16 is for scraping up dirt 17 caught on the screen bar 2, and has two types of cutting edges 16A and 16a, large and small, corresponding to the gaps G and g of the screen bar 2.

An apron 18 is provided on the frame 5 from the upper end of the screen 1 to the sprocket wheel 12 above. This apron 1
Reference numeral 8 guides the dirt 17 scraped off from the screen 1 by the rake 16 to the upper part of the frame 5 and causes it to fall onto the belt conveyor 19. The upper sprocket wheel 12 is rotated by a drive device (not shown), and can be adjusted up and down by a tension mechanism 20.

The reference numeral 21 is a management bridge spanning the waterway 11, and the reference numeral 22 is a stopper provided at the bottom of the waterway 11.

The solid line in FIG. 1 shows the state in which the frame 5 is lowered from the state shown by the two-dot chain line in the same figure and the screen 1 is set in the waterway 11. As in the conventional case, the chain 15 is moved clockwise in FIG. By circulating the rake 16, the screen bar 2 of the screen 1 is
from the bottom to the top along the screen bar 2
The garbage 17 caught on the screen bar 2 is scraped off from the screen bar 2 with the cutting edges 16A, 16a of the rake 16, and is carried to the upper part by sliding on the apron 18 and dropped onto the belt conveyor 19.

In the above, garbage 1 that has flowed through the waterway 11
Most of the screen bars 7 are hooked on the upstream edges of the two screen bars 2, 2 with a narrow gap g at the same time as shown in FIG. The small cutting edge 16a of the rake 16 comes into contact with the right side surface of the right screen bar 2, and the small cutting edge 16a of the rake 16 catches the middle part of the dirt 17 and scrapes it up. Therefore, unlike in the past, dirt does not get caught between the screen bar and the cutting edge of the rake and exert excessive resistance on the upward movement of the rake.

FIG. 4 shows another embodiment of the present invention, in which the smaller cutting edge 16a of the rake 16 scrapes off dirt 17 in advance of the larger cutting edge 16A. In this case, the smaller blade edge 16a inserted into the narrow gap g will lead to the garbage 1.
Since the screen bar 7 is scraped up, dirt touching the side surface of the screen bar 2 is prevented from being bitten, which is convenient.

Technical matters other than those listed above. Other examples will be described below.

(1) The screen-type dust removal device shown in the figure is of a back-descending front raking system, but other types such as a front-descending back raking system may be used, or the screen 1 may be of a fixed type.

(2) The thickness of screen bar 2 in the figure is 9 mm, and the gap G
is 50 mm, and the gap g is 15 mm, but the plate thickness and gap are not limited to the above. Regarding the gap, if it is too large, the efficiency of trapping dust will be poor, and if it is too small, the screen 1 The larger gap G is not only complicated, but also has a negative effect on water flow.
is 40 to 110 mm, the smaller gap g is 10 to 25
Set to mm.

(3) The gap between the screen bar 2 in the picture is 2 sizes
Although it is a species, there may be three or more species.

(4) Although the upstream and downstream edges of the screen bar 2 shown in the figure are both finished in corners, they may also be finished in a streamlined or circular shape.

[Effect of idea]

As explained above, the screen-type dust removal device according to the present invention has a screen installed in a waterway, in which a large number of screen bars are arranged in parallel, with the lengths aligned in the vertical direction and with the required width spaced apart. , in a screen-type dust removal device in which a rake whose cutting edge is inserted into the gap between the screen bars is moved along the screen bar of the screen to scrape off the dust captured by the screen bar, the gap between the horizontally adjacent screen bars is The width of
Since the structure is made up of alternating large and small particles, the dirt caught on the screen bar will not get caught between the screen bar and the rake's cutting edge, and the dirt raking operation will always be carried out smoothly. It can be done.

[Brief explanation of the drawing]

Fig. 1 is a side view showing an embodiment of the screen-type dust removal device according to the present invention, Fig. 2 is a longitudinal cross-sectional view showing the relationship between the screen and the rake, Fig. 3 is a cross-sectional view of the same, and Fig. 4 is a cross-sectional view of the same. FIG. 7 is a front view showing the relationship between the screen bar and the cutting edge of the rake in another embodiment of the present invention. 1...Screen, 2...Screen bar, 1
1... Channel, 16... Rake, G... Gap, g...
…gap.

Claims (1)

[Scope of utility model registration request] A screen is installed in a waterway with a large number of screen bars arranged in parallel with the lengths aligned vertically and with required gaps in the lateral direction. A screen-type dust removal device that moves along a screen bar to scrape off dust caught on the screen bar, characterized in that the width of the gap between the horizontally adjacent screen bars is alternately large and small. Type dust removal device.