JPH108439A - Refuse blocking device for intake - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a refuse blocking device, by which refuse flowing in a river is not collected in the river side intake part of an inlet channel to be surely let flow downstream as it is in the river, thereby eliminating the need of troublesome work such as recovery and cleaning work for the screen surface, and also the efficiency of filtration on the screen surface is not be lowered. SOLUTION: Plural cylindrical screens S where many discs are fixed to a rotating shaft are rotatably arrayed at designated spaces, and arranged in such a manner that the disc of an adjacent cylindrical screen S is inserted in the interval between the discs of the cylindrical screen S to construct a multiple rotary disc screen. The thus constructed screen is installed in an intake of an inlet channel. A flow velocity lowering means for lowering the intake flow velocity in the downstream of a river of the intake 1 is formed by providing a water cut-off plate 7 adjacent to the river downstream back of the multiple rotary disc screen, and the water cut-off plate 7 is disposed in such a manner as to be projected to the main stream side of the river.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is provided at an intake of an intake channel for irrigation water, cooling water of a power plant, water for drinking water, etc. from a river or the like, and dirt flowing into the intake from the river is taken into a river side intake. The present invention relates to a garbage prevention device for an intake which prevents the refuse from being collected at the intake by flowing down the river downstream.

[0002]

2. Description of the Related Art Conventionally, when a part of a river water flow is taken as irrigation water, cooling water for a power plant, water for a water supply, or the like, or a part of the river water is purified to purify the river. In a system that returns to the river after flowing through the purification facility, the intakes of these intake channels are formed by opening along the flowing direction of the river's flowing surface, for example, the slope of the river as shown in the drawing, and Waste removal means are installed at the intake to prevent inflow of waste into the road. Conventional refuse removal means are generally provided with a screen at the intake of the river, and the refuse flowing down the river is blocked by the screen so as not to flow into the water channel. Or push it out to the main river side,
Alternatively, dust is removed from the screen surface by human power or mechanical power of a dust remover, and the removed waste is transported to an incinerator or a landfill to be disposed of.

[0003]

SUMMARY OF THE INVENTION Conventional small pump stations,
Only screens are installed at the intakes of power plants, etc., and the debris blocked by these screens is removed manually or periodically, but the intakes are generally located far away from the management building where workers reside. Therefore, daily inspection and dust removal work are troublesome. Even when an automatic dust remover is installed to automatically collect garbage that has been removed by the screen, dumping the collected garbage into the main stream is not permitted in river management, so it is prevented by the screen and collected. Regardless of whether the waste is human-powered or mechanical, the collected waste must be disposed of by disposal such as incineration and landfill. In recent years, in order to purify a river, a system has been developed in which a part of the running water of the river is removed, purified through a purification facility, and then returned to the river. However, the place where such river purification equipment is installed generally has no commercial power source or can use only small power such as solar power generation, so there is a problem that a system using large power cannot be installed.

The present invention does not collect refuse flowing through a river at a river-side intake of a water channel, but allows the refuse to flow down the river without fail, thereby performing complicated operations such as collecting refuse and cleaning the screen surface. An object of the present invention is to provide a dust-inhibiting device for an intake port, which eliminates the work and does not lower the filtration efficiency on the screen surface.

[0005]

In order to achieve the above-mentioned object, a dirt preventing device for an intake according to the present invention comprises a plurality of cylindrical screens having a large number of disks fixed to a rotating shaft, rotatably arranged at predetermined intervals. A multi-rotational disc screen, which is arranged side by side so that the discs of adjacent cylindrical screens are inserted between the disc gaps of the cylindrical screen, is installed at the intake of the water channel, and the river at the intake is installed. A flow rate reducing means for lowering the water intake flow rate on the downstream side is formed by providing a water stop plate close to the back side of the downstream side of the river of the multiple rotating disk type screen, so that this water stop plate protrudes to the main stream side of the river. It is characterized by being arranged.

[0006] In the dust prevention device of the present invention having the above-mentioned structure, the screen installed in the water intake includes:
Since the intake flow velocity on the downstream side of the river is reduced and it is projected to the main stream side, when a part of the river water flows into the intake channel side through the screen, the waste flowing down the river is screened at the intake velocity. Will be attached to the surface,
When the screen is moved to the downstream side while being adsorbed on the screen by the rotating screen, and reaches the downstream end of the screen, the water flowing into the intake channel side is blocked by the resistance at the downstream screen side of the river. As a result, the flow rate of water intake decreases, and the adsorbing power of the debris on the screen surface also weakens.Therefore, the debris adsorbed and moving on the screen surface is now separated from the screen surface by the flowing water power on the river side, and on the main stream As a result, the water is pushed out to the mainstream side of the river and naturally flows downstream, whereby a predetermined amount of water can be taken to the water intake channel side by always filtering the water flowing on the screen surface without removing dust.

In this case, the flow velocity reducing means can be constituted by disposing a resistance plate on the side of the water blocking plate facing the multiple rotating disk type screen.

[0008] In the dust-inhibiting device for an intake of the present invention having the above-mentioned structure, the intake flow velocity on the downstream side of the river can be effectively reduced with a simple structure.

Further, in this case, dust adsorption preventing means can be provided on the cylindrical screen on the upstream side of the river constituting the multi-rotation disk type screen.

[0010] In the refuse preventing device for an intake of the present invention having the above-mentioned structure, refuse flowing down the river is surely attached to the outer peripheral surface of the cylindrical screen arranged at the most upstream side. It can be washed away downstream.

In this case, the dust suction preventing means may be a guide plate disposed along the river-side outer peripheral surface of the cylindrical screen.

In the dust-inhibiting device for the water intake according to the present invention having the above-described structure, it is possible to prevent the falling dust from adhering to the cylindrical screen arranged on the most upstream side with a simple structure.

[0013]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment of an apparatus for preventing dust from entering an intake port according to the present invention. In the drawing, reference numeral 1 denotes a river, and an intake 3 of an intake channel 2 is arranged so as to face the main flow surface of the river 1, that is, facing the river, and to open along the direction of water flow. The dust prevention device 4 of the present invention is installed at the distal end portions of the nearby opposing side walls 31, 32, that is, at the intake port distal end position.

The refuse preventing device 4 is constructed by arranging a large number of cylindrical screens S, which are formed by skewing a large number of disks on a shaft on a frame F, adjacent to each other and juxtaposed to form a multi-rotating disk type screen. Then, a part of the frame F is attached so as to be dropped into the angled grooves 33, 33 formed inside the side walls 31, 32.

The frame F of the refuse prevention device 4 has upper and lower members 41 and 42 arranged vertically in parallel to support the upper and lower portions of each of the cylindrical screens S arranged in parallel with each other in the multiple rotating disk type screen. Vertical members 43 and 44 are bridged between both ends of the upper and lower members 41 and 42, and an upper arm member 45 and a lower arm member 46 are protruded from both ends of the upper member 41 and the lower member 42, respectively. The inserts 47, 47 which are substantially perpendicular to the ends of the members 45, 46 are integrally provided and formed,
The discs adjacent to the frame F are arranged in parallel so that they can be inserted between the disc gaps so that the cylindrical screens S can be rotationally driven.

Each of the cylindrical screens S of the multiple rotating disk type has a bearing 50, an upper member 41 and a lower member 42 of the frame F, and a bearing 50, which is located at a position vertically opposed to the lower end of the rotating shaft, respectively.
51, a rotating shaft 52 is rotatably supported between the bearings 50, 51. The rotating shaft 52 has a disk 53 having a required thickness and outer diameter, and a mesh width of a cylindrical screen. A plurality of distance pieces each having a thickness smaller than the diameter of the circular plate 53 are alternately fitted.
A power transmission mechanism 55 is provided on the upper part of the rotating shaft 2, and a power transmission means 55 such as a pulley, a sprocket wheel, or a gear is provided on the upper part of each rotating shaft 52.
Axis 52 of all cylindrical screens arranged in parallel
Are rotated in the same direction so as to be the same as the flowing direction of the river.

The screen portion of the water intake formed by a plurality of cylindrical screens S arranged in parallel with the frame F has an intake opening width in the downstream direction of the water intake or as shown in the drawing. In addition to determining the number of cylindrical screens to be larger, the garbage that was prevented from flowing into the intake channel by the multiple rotating disk type screen again flows down the river on the main stream of the river again. The arrangement of the cylindrical screen on the downstream side of the multiple rotating disk type screen is made to protrude forward as shown in FIG. Thereby, the refuse transferred and flowing down along each cylindrical screen surface smoothly and reliably transfers to the main stream of the river, and flows down in the downstream direction of the river.

A large number of cylindrical screens S arranged in parallel with the intake port 1 are provided with the rotation axis inclined in accordance with the inclination angle of the intake opening wall surface, and the slope of the river and the surface of the cylindrical screen are arranged. Arranged so that they are flush,
It can be arranged without obstructing the flow on the main stream side.

The upstream end of the multi-rotating disk type screen is located upstream of the cylindrical screen at the most upstream end position, in particular, in order to prevent the falling dust from adsorbing or adhering to the upstream side of the river. A dust suction preventing means 5 (guide plate) is provided along the outer peripheral surface on the mainstream side of the cylindrical screen at the side end position. As shown in FIG. 1, the guide plate 5 is bent in an arc shape along the outer peripheral surface of the cylindrical screen S, so that the screen at the most upstream side of the river has no screen that rotates upstream. Therefore, the effect of preventing dust flowing down is less than the other screen parts, but along the guide plate provided along the river side outer peripheral surface of the cylindrical screen arranged on the uppermost stream side of the river, Dust that adheres to the outer peripheral surface of the screen can be forced to flow in the downstream direction.

At the downstream end of the multi-rotating disk type screen, the speed of inflow into the flowing water channel is reduced as compared with other places, so that adhesion or adsorption of dirt to the outer peripheral surface of the screen is weakened. A means for reducing flow velocity will be provided so that it will flow naturally down the river on the main stream. The flow velocity reducing means provided at the intake portion on the intake channel side is a water stop plate at the back of the cylindrical screen S disposed downstream of the river, that is, at the anti-river side, of the multiple rotating disk type screens disposed at the intake port. 7 is arranged obliquely as close to the outer peripheral surface of the cylindrical screen as possible and its end protrudes toward the mainstream of the river.
Thereby, even if a part of the running water of the river flows in from the gap between the disks of the cylindrical screen on the downstream side of the river, the flow of water to the intake channel side is prevented by the water stop plate 7 on the rear side, that is, the cylindrical screen In the cylindrical screen portion arranged upstream of the downstream cylindrical screen, a part of the river water flows into the intake channel from the eye of each cylindrical screen. However, since the back of the upstream cylindrical screen is in communication with the intake channel, the inflow velocity flowing through the screen is unimpeded, so that the speed is high. While being adsorbed on the mainstream side outer peripheral surface of the cylindrical screen by the inflow pressure of, the adjacent screens are sequentially turned to the downstream side by the rotation of the adjacent screens. Then, the dust reaches the downstream cylindrical screen portion. However, on the side of the main stream of the cylindrical screen on the downstream side of the river, there is no adsorption force due to the inflow water pressure of the refuse, and the refuse is projected to the main stream side. Without being adsorbed, it will flow naturally downstream on the main stream of the river.

The water stop plate 7 is provided with a resistance plate 8, and the resistance plate 8 has a protruding tip as close as possible to the outer peripheral surface of the disk between adjacent disks of the downstream cylindrical screen. Place in close proximity to As a result, even if a part of the river flow water flows in from the gap between the discs of the screen, the flow is prevented from flowing down to the intake channel side by the projections. The flow velocity decreases, and as in the above-described embodiment, the adsorption of dust is released at this position.

Further, at the upstream end of the multi-rotation disk screen 4, an arc-shaped guide 5 is provided along the outer peripheral surface of the upstream cylindrical screen S on the river mainstream side. This is because the cylindrical screen at the uppermost stream of the river has no screen that rotates upstream and has a smaller blocking effect than the others, but by providing a guide plate along the cylindrical screen at the upstreammost stream of the river, Forcibly flows downstream.

Therefore, the intake of the water channel is provided so as to open to the main stream side of the river, and multiple rotating disk type screens are arranged in parallel so as to block the opening of the intake, and each screen is arranged in the water flow direction. When the water is taken into the waterway by rotating the circular plate, the garbage flowing down will not adhere to the outer peripheral surface of the cylindrical screen at the most upstream because the screen at the most upstream of the river has no screen that rotates upstream. Since the guide plate is formed on the uppermost stream-side cylindrical screen, the falling dust is forcibly swept downstream by the guide plate. As a result, the uppermost cylindrical screen is less effective in preventing debris than other screen parts, but the debris flowing down the main stream in this way is reduced to the second and lower cylindrical screens. When water is taken out, it is blocked by the screen surface due to the flowing water pressure, flows down along with the rotating action of the cylindrical screen and the water flow, and is sequentially transported toward the downstream screen, and further flows down the river. In this way, the dust is prevented from flowing into the water intake channel by the cylindrical screen, and all the water intake into the water channel is filtered from the screen, thereby preventing the dust from flowing into the water intake channel. As described above, the refuse flowing down the main stream is not removed at the intake port, but flows down the river, so that it is not necessary to dispose of the collected refuse as in the related art. When reaching the lowermost cylindrical screen portion, the inflow at the screen portion is suppressed, so that the garbage that has adhered to the outer peripheral surface of the cylindrical screen until now has a weaker adhering force and has a lower mainstream side. It is pushed out of the river and flows downstream along the main stream of the river.

[0024]

According to the present invention, in the screen installed at the intake, the intake flow velocity on the downstream side of the river is reduced, so that when a part of the river water flows into the intake channel through the screen. The garbage flowing down the river will be adsorbed on the screen surface at the flow rate of the intake water. On the downstream screen side of the river, the inflow of water into the intake channel side is blocked by resistance, so the flow velocity of intake water decreases and the adsorption power of the garbage on the screen surface also weakens. Here, the garbage that has moved is separated from the screen surface by the flowing water power of the river side and flows down in the downstream direction. There is the advantage that always a predetermined amount of water intake the flowing water is filtered to intake roadside lean side.

According to the second aspect of the present invention, since the water stop plate having the resistance plate protruding from the downstream side of the river of the multiple rotating disk type screen is disposed close to the screen, the flow rate of water intake can be easily and reliably ensured. Since the water intake flow velocity is high at a position higher than this, the waste flowing down the river can be filtered and taken in, and the waste can be allowed to flow downstream as it is.

According to the third aspect of the present invention, the refuse flowing down the river can surely flow downstream without adhering to the outer peripheral surface of the cylindrical screen arranged at the most upstream side. it can.

According to the fourth aspect of the present invention, since the screen at the most upstream side of the river has no screen that rotates upstream, the effect of preventing dust flowing down is less than that of other screen portions. However, by providing a guide plate along the river-side outer peripheral surface of the cylindrical screen arranged on the uppermost stream side of the river, along the guide plate, the refuse adhering to the screen outer peripheral surface is forcibly downstream. Can flow in any direction.

[0028]

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of a dust blocking device for an intake port according to the present invention.

FIG. 2 is a front view of the same.

FIG. 3 is a vertical sectional side view of the same.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Intake port 31 Side wall 33 Corner drop groove 41 Upper member 42 Lower member 43 Vertical member 45 Arm material 50 Bearing 52 Rotation shaft 53 Disk 55 Power transmission mechanism 56 Motor 4 Dust prevention device F Frame S Cylindrical screen 5 Guide 6 Scraper 7 Stop Water plate 8 Resistance plate

Continued on the front page (72) Inventor Takuya Sakaguchi 3-1-15 Sunayama Minami, Wakayama City, Wakayama Prefecture Wakayama Construction Office, Kinki Regional Construction Bureau, Ministry of Construction (72) Inventor Tetsuo Yamagata 3-1-1 Shimosakabe, Amagasaki City, Hyogo Prefecture No. within Hitachi Kiden Kogyo Co., Ltd. (72) Inventor Eiichi Muto 3-1-1, Shimosakabe, Amagasaki City, Hyogo Prefecture Inside of Hitachi Kiden Co., Ltd. (72) Akira Yoneda 3-1-1, Shimosakabe, Amagasaki City, Hyogo Prefecture No. within Hitachi Kiden Kogyo Co., Ltd.

Claims (4)

[Claims] 1. A plurality of cylindrical screens having a large number of disks fixed to a rotating shaft are arranged rotatably at predetermined intervals, and disks adjacent to the cylindrical screen are inserted between the disk intervals of the cylindrical screen. The multi-rotating disk screens arranged side by side as described above are installed at the intake of the intake channel, and a flow velocity reducing means for reducing the intake flow velocity on the downstream side of the river at the intake is provided on the downstream side of the multi-rotating disk type screen. A dust prevention device at an intake, wherein a water stop plate is provided near the back surface and the water stop plate is disposed so as to protrude toward a main stream side of a river. 2. A device as claimed in claim 1, wherein said flow rate lowering means comprises a resistance plate provided on a side of said water stop plate facing said multi-rotating disk type screen. 3. The dirt preventing device for an intake port according to claim 1, wherein a dirt adsorption preventing means is provided on the cylindrical screen on the river upstream side constituting the multi-rotating disk type screen. 4. The dust prevention device for an intake according to claim 3, wherein the dust suction prevention means is a guide plate arranged along the river-side outer peripheral surface of the cylindrical screen.