JP3756627B2 - Waste entry prevention device at intake - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is installed at the intake of a water intake such as irrigation water in a river, cooling water of a power plant, water for water supply, etc., and refuses to flow into the intake from the river on the river side. The present invention relates to a debris entry prevention device for a water intake that is caused to flow down in a direction so that the waste is not captured or retained at the water intake.
[0002]
[Prior art]
Conventionally, when taking water from rivers, etc. for purposes such as irrigation water, power plant cooling water, and water supply, or when taking water for the purpose of purifying rivers or adjusting the amount of water during heavy rain, the intake of the intake channel In order to prevent waste from flowing into the water intake from the river.
[0003]
For this purpose, the most common type of refuse entry prevention device provided at the water intake is a bar screen. In the case of a bar screen, the dust captured by the bar screen is periodically scraped and scraped. The raised garbage is transported to an incinerator or landfill site for disposal.
[0004]
[Problems to be solved by the invention]
For this reason, there has been a problem that it takes a lot of time and effort to maintain and manage the garbage entry prevention device.
In addition, the work of scooping up the garbage collected by the bar screen can be done automatically by installing an automatic dust remover, if necessary. Because it is not permitted in river management, it was necessary to manually transport the scrapped waste to an incinerator or landfill site for disposal.
[0005]
The present invention solves the above-mentioned problems of the conventional intake entrance debris prevention device, prevents waste from flowing into the intake side from the river, and causes the intake side to flow downstream in the river. It is an object of the present invention to provide a dust entry prevention device for a water intake that prevents dust from being trapped or accumulated.
[0006]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, a waste entry preventing device for a water intake according to the present invention comprises a plurality of cylindrical screens each having a plurality of circular plates fixed to a shaft at predetermined intervals. In the water intake debris entry prevention device arranged at the water intake so that the disks overlap each other, the rotational axis of the cylindrical screen is set eccentric with respect to the center of the disk of the cylindrical screen , The direction of movement of the outer peripheral surface of the cylindrical screen disk is the same as the direction of river flow, and waste flowing down the river adsorbed on the outer peripheral surface of the cylindrical screen is centered in the width direction of the river. It is characterized in that it is pushed out, weakened the adsorption force, and moved downstream .
[0007]
In this intake entrance debris prevention device, the rotation axis of the cylindrical screen is set eccentrically with respect to the center of the cylindrical screen disc, and the movement direction of the outer peripheral surface of each cylindrical screen disc is the direction of the river. The waste water flowing down the river adsorbed on the outer peripheral surface of the cylindrical screen is pushed out toward the center in the width direction of the river, weakening the adsorption force, and moving downstream. since so as to, when rotating the rotary shaft, the outer peripheral surface of a cylindrical screen which is composed of a number of disc becomes to vibrate in the river width direction and running water directions in a horizontal plane, it flows down the river Garbage is forced to flow downward and smoothly by the action of the rotation and vibration of the cylindrical screen and flowing water without being trapped or staying on the outer peripheral surface of the cylindrical screen. It is possible to prevent the inflow of waste to Mizuguchi.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a water intake dust entry preventing device according to the present invention will be described below with reference to the drawings.
[0009]
1 to FIG. 2 show an embodiment of the waste entry preventing apparatus for water intake according to the present invention.
This intake entry preventing device 4 at the intake port is disposed at the intake port 3 of the intake channel 2 provided in the river 1, and a large number of discs 51 are arranged on a shaft 52 at predetermined intervals on a frame 41. A plurality of cylindrical screens 5 that are fixedly arranged are arranged so that the discs 51 of the adjacent cylindrical screens 5 overlap each other.
[0010]
The cylindrical screen 5 composed of a large number of discs 51 is rotated by rotationally driving rotary shafts 53 provided on the upper and lower ends of a shaft 52 to which the discs 51 are fixed by a motor 42 provided on the frame 41. It is configured as follows.
[0011]
Each cylindrical screen 5 rotates in the same direction so that the moving direction of the cylindrical screen 5, that is, the outer peripheral surface of the disc 51, is the same as the flowing direction of the river (the plane of FIG. 1A). However, the peripheral speed of the outer peripheral surface of the disk 51 is not necessarily required to coincide with the flow speed of the river, and is not particularly limited. Set it slightly faster than the speed.
[0012]
In this case, the rotating shaft 53 of the cylindrical screen 5 is relative to the center O of the disc 51 of the cylindrical screen 5, that is, in this embodiment, the shaft 52 provided through the center O of the disc 51. So that it is eccentric.
As a result, when the rotary shaft 53 is rotationally driven by the motor 42, the outer peripheral surface of the cylindrical screen 5 composed of a large number of discs 51 vibrates in the river width direction and the flowing water direction in the horizontal plane as shown in FIG. (The amplitude s of the cylindrical screen 5, that is, the outer peripheral surfaces 51A and 51B of the disc 51 is twice the eccentric amount d of the rotating shaft 53), and the dust flowing down the river 1 is cylindrical. Without being trapped or staying on the outer peripheral surface of the cylindrical screen 5, the cylindrical screen 5 is forced to flow down smoothly and smoothly by the action of the rotation, vibration and flowing water. Inflow can be prevented.
[0013]
In addition, a large number of discs 51 having a required plate thickness and outer diameter are fixed to the shaft 52 at intervals corresponding to the mesh width of the cylindrical screen 5. In order to accurately determine the intervals between the discs 51. A distance piece (not shown) can be disposed between the discs 51.
[0014]
Further, the outer periphery of the cylindrical screen 5 positioned on the most upstream side of the dust entry preventing device 4 is arcuate so that dust does not flow into the water intake 3 through the gap between the cylindrical screen 5 and the frame 41. On the other hand, the disc 51a of the cylindrical screen 5 located on the most downstream side is made thicker than the discs 51 of the other cylindrical screens 5 and so on. The dust is prevented from flowing into the water intake 3 through the gap between the discs 51a on the downstream side where the discs do not overlap.
[0015]
By the way, in this embodiment, the rotating shaft 53 of the cylindrical screen 5 is provided eccentrically with respect to the shaft 52 provided through the center O of the disc 51. However, the rotating shaft 53 and the cylindrical shape are provided. The mechanism for decentering the center O of the disc 51 of the screen 5 is not limited to this. For example, as shown in FIG. 3, the shaft 52 provided eccentrically with respect to the center O of the disc 51 is rotated. It can also be an axis.
[0016]
Next, the operation of the dust entrance prevention device for the intake port will be described.
A rotating shaft 53 of the cylindrical screen 5 of the garbage intrusion prevention device 4 installed over the entire width of the intake port 3 of the intake channel 2 provided in the river 1 is rotationally driven by a motor 42.
Thereby, the outer peripheral surface of the cylindrical screen 5 constituted by a large number of discs 51 vibrates in the river width direction and the flowing water direction in the horizontal plane, and the dust flowing down the river 1 flows into the intake port 3. Even if it is adsorbed on the outer peripheral surface of the cylindrical screen 5 by the action of the water flow, it is pushed out toward the center of the river 1 in the width direction, and the adsorbing force weakens and moves toward the downstream. Without being trapped or staying on the surface, the cylindrical screen 5 is forced and smoothly moved downstream by the rotation and vibration of the cylindrical screen 5 and the action of running water, and flows down the river 1.
The waste flowing down the river 1 is prevented from flowing into the water intake 3 by the waste entry preventing device 4 having the cylindrical screen 5, and the water introduced into the water intake 2 through the water intake 3 is , It will be filtered without waste.
[0017]
【The invention's effect】
According to the dust entrance prevention device of the water intake port of the present invention, the rotational axis of the cylindrical screen is set eccentrically with respect to the center of the disk of the cylindrical screen, and the movement of the outer peripheral surface of the disk of each cylindrical screen The direction is the same as the direction of river flow, and the waste flowing down the river adsorbed on the outer peripheral surface of the cylindrical screen is pushed toward the center of the river in the width direction, weakening the adsorption force and downstream since the move towards and for rotating the rotary shaft, the outer peripheral surface of a cylindrical screen which is composed of a number of disc becomes to vibrate in the river width direction and running water directions in a horizontal plane, Garbage flowing down the river is forced to flow downstream smoothly and forcibly by the rotation and vibration of the cylindrical screen and the action of running water without being trapped or staying on the outer peripheral surface of the cylindrical screen. To become. This makes it easy to maintain and manage the waste intrusion prevention device, starting with the elimination of the work of transporting and scraping the scraped waste to an incineration site or landfill, as with conventional bar screens. be able to.
[Brief description of the drawings]
1A and 1B show an embodiment of a water intake debris prevention device according to the present invention, wherein FIG. 1A is a plan view and FIG. 1B is a front view.
FIG. 2 is an explanatory diagram of an eccentric mechanism of a circular disc of a cylindrical screen.
FIG. 3 is an explanatory view of a modified example of the eccentric mechanism of the disc of the cylindrical screen.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 River 2 Intake channel 3 Intake port 4 Garbage entry prevention device 41 Frame 5 Cylindrical screen 51 Disc 52 Axis 53 Rotation axis

Claims (1)

Dust in the intake port formed by arranging a plurality of cylindrical screens fixed to the shaft at predetermined intervals on the intake port so that a plurality of adjacent cylindrical screen discs overlap each other. In the entry blocking device, the rotational axis of the cylindrical screen is set eccentric with respect to the center of the cylindrical screen disk, and the movement direction of the outer peripheral surface of each cylindrical screen disk is the same as the flowing direction of the river. The waste flowing down the river adsorbed on the outer peripheral surface of the cylindrical screen is pushed out toward the center of the river in the width direction, weakening the adsorbing force and moving downstream . An apparatus for preventing entry of dust into a water intake.

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