JP3723667B2 - Solid matter 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 for a power plant, water for drinking water, pumping and drainage station, etc., and blocks solids that are about to flow into the intake from the river. In addition, the present invention relates to a solid matter intrusion prevention device for a water intake that is caused to flow downstream in a river so that the solid 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 solid matter from flowing into the water intake from the river, a solid matter entry prevention device is installed in the river.
[0003]
For this purpose, the most common solid substance entry prevention device provided at the water intake is a bar screen. In the case of a bar screen, the solid matter captured by the bar screen is periodically scraped. The scraped up waste is transported to an incinerator or landfill site for disposal.
[0004]
[Problems to be solved by the invention]
For this reason, the conventional solid matter entry prevention device provided at the water intake has a problem that it requires a great deal of labor to maintain and manage the solid matter entry prevention device including disposal of the scraped-up waste.
The work of scraping the solid matter captured by the bar screen can be done automatically by installing an automatic dust remover, if necessary. Since it is not allowed for river management, the work of transporting the scrapped waste to an incineration site or landfill site etc. has to be done manually anyway.
[0005]
By the way, in order to cope with the problem of the solid matter entry prevention device provided in the conventional water intake, the applicant of the present invention first fixes a large number of discs to a rotating shaft at predetermined intervals. A solid water entrance blocking device for a water intake has been proposed in which a plurality of configured cylindrical screens are arranged in a water intake so that the disks of adjacent cylindrical screens overlap each other.
[0006]
This intake solids entry blocking device blocks solids that are about to flow into the intake from the river and causes them to flow downstream in the river so that no solids are captured or retained at the intake. Although the intended purpose of being able to be achieved can be achieved, when a large-diameter disk is used for the cylindrical screen, the cylindrical screen protrudes greatly to the river side. Therefore, there has been a drawback that it is easily damaged by the falling material.
[0007]
In view of the above-mentioned problems of the conventional solid matter entry blocking device of a water intake, the present invention prevents solids that are about to flow into the water intake from the river on the river side, and flows down in the downstream direction of the river. To provide a solid matter entry prevention device for a water intake that can prevent solids from being trapped or stayed at the water intake, and that a portion constituting the device does not protrude greatly to the river side. With the goal.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, a solid matter entry preventing device for a water intake according to the present invention includes a pair of endless chains that are stretched substantially horizontally along a water intake of a water intake and are circulated. A connecting shaft extending in a vertical direction spanning a chain at a predetermined interval so as to be rotatable, and attached to the connecting shaft in a comb-like shape at a predetermined interval, and its tip reaches an adjacent connecting shaft Ri Do and a screen element extending in the horizontal direction with a length, the endless chain as the screen elements located in the river side is circularly driven so as to move in the flow-down direction of the river, and the screen element, the river side A screen rail for opening and closing the screen element is provided along the intake port so that it closes when it is located and opens when it is located on the intake channel side. By rotating operation of the coupling shaft by slide moving along a Remento closing guide rail, characterized in that so as to open and close the screen element.
Here, when the screen element is closed, the screen element is substantially parallel to the endless chain and covers the water intake. On the other hand, when the screen element is opened, the screen element is substantially perpendicular to the endless chain and the water intake is closed. The state where is opened.
[0009]
In this solid matter entry preventing device at the intake port, a screen element is attached in a comb-like shape to a connecting shaft that is pivotally spanned between a pair of endless chains that are driven to circulate, so that the river flows down. Even if the solid matter is adsorbed on the outer surface of the screen element that constitutes the screen, the endless chain is driven to circulate and move in the downstream direction along with the movement of the screen element. Flow down.
The screen element located on the river side covers the water intake, prevents solids flowing down the river from entering the water intake, and the screen element located on the water intake side covers the water intake. It does not become resistance of flowing water that has passed through the element, and flowing water can be smoothly introduced into the intake channel.
Further, by arranging a guide rail for opening and closing the screen element along the water intake port, by rotating the connecting shaft by a sliding body composed of a guide roller, a shoe and the like moving along the guide rail for opening and closing the screen element, The screen element can be reliably operated to close when it is located on the river side and open when it is located on the intake channel side.
[0010]
Further, a scraper can be disposed on the downstream side of the water intake.
[0011]
Thereby, the solid matter adsorbed on the outer surface of the screen element on the river side or sandwiched between the screen elements can be detached from the screen element and returned to the river to flow down.
[0012]
Further, a rake can be formed on the outer surface of the connecting shaft or the screen element with an appropriate interval.
[0013]
Thereby, when the solid substance flowing down the river stays in front of the screen, the staying solid substance can be forcibly moved in the downstream direction in accordance with the movement of the connecting shaft and the screen element.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a water intake solid matter entry preventing device according to the present invention will be described below with reference to the drawings.
[0015]
1 to 4 show an embodiment of a solid matter entry preventing device for a water intake according to the present invention.
This solid matter entry blocking device at the intake port is installed at the intake port P of the intake channel R2 for irrigation water, power plant cooling water, tap water, etc. in the river R1, and flows into the intake port P from the river R1. This is intended to prevent the solid matter to be blocked on the river R1 side and to flow downstream in the river R1 so that the solid matter is not captured or retained at the intake port P. The rotary shafts 1S and 2S are installed in the vertical direction, and the sprocket wheels 1 and 2 are disposed at the upper and lower ends of the rotary shafts 1S and 2S, that is, above and below the water surface of the intake port P. , 2, a pair of endless chains 3, 3 are stretched approximately horizontally along the intake port P of the intake channel R 2, and the endless chain 3 is connected to the rotary shafts 1 S, 2 S (in this embodiment, the rotation By rotating the shaft 2S) Circulatingly driven, with a predetermined interval between the endless chains 3 and 3, the connecting shaft 4 is spanned in the vertical direction so as to be rotatable via an appropriate rotating mechanism 3 </ b> A such as a link or a bearing. A screen element 5 is attached in a comb-like shape with a predetermined interval on the shaft 4, and a circulation type screen S is constituted by the connecting shaft 4 and the comb-like screen element 5.
[0016]
In this case, one rotary shaft 2S is provided with a drive device 2D so that the rotary shaft 2S is rotationally driven so that the endless chains 3 and 3 located on the river R1 side move in the downstream direction of the river R1. To.
Although the moving speed of the endless chains 3 and 3 can be fixed to a predetermined speed, it is desirable that the speed can be adjusted so that the moving speed is the same as or faster than the river R1. .
[0017]
The screen element 5 attached in a comb-like shape with a predetermined interval to the connecting shaft 4 has a length that reaches the connecting shaft 4 whose tip is adjacent (located in the direction opposite to the moving direction of the endless chain 3), That is, it is formed longer than the arrangement pitch of the connecting shaft 4.
Thereby, the adjacent screen elements 5 located on the river R1 side overlap each other, cover the water intake P, and prevent the solid matter flowing down the river R1 from entering the water intake P. .
[0018]
In this case, the screen element 5 reliably prevents the solid matter flowing down the river R1 from entering the water intake P through the gap of the screen element 5 as in the modification of the present embodiment shown in FIG. In order to allow the tip 51 to be inserted between the adjacent screen elements 5, the phase of the adjacent screen elements 5 arranged on the connecting shaft 4 is shifted, and the tip 51 is bent. Can be formed.
[0019]
Further, when the solid material flowing down the river R1 stays on the outer surface of the connecting shaft 4 or the screen element 5 on the front surface of the screen S, the staying solid matter is adjusted to the movement of the connecting shaft 4 and the screen element 5. The rake 52 can be formed at an appropriate interval so that it can be forcibly moved in the downstream direction.
[0020]
Furthermore, in the present embodiment, the arrangement pitch of the screen elements 5 serving as the mesh width of the screen S is constant from the upper part to the lower part of the screen S. For example, when the intake channel R2 is heavy rain of the river R1 For the purpose of adjusting the amount of water, the pitch of the screen elements 5 is set so that the upper part of the screen S is larger and the lower part is smaller, so that when the water level of the river R1 is high, water intake to the intake channel R2 is taken. The amount can be increased.
[0021]
In addition, a sliding body Ra made of a guide roller, a shoe or the like is disposed at an appropriate location of the connecting shaft 4, for example, at the upper end thereof. By moving along the installed screen element opening / closing guide rail Ga, the connecting shaft 4 is rotated, so that the screen element 5 is closed when positioned on the river R1 side, and the screen element 5 is moved to the endless chain. 3 opens substantially when it is located on the intake channel R2 side so that the screen element 5 is substantially perpendicular to the endless chain 3 and opens the intake port P. To be in a state to do.
[0022]
Further, the load of the screen S is supported by the rotating shafts 1S and 2S via the endless chains 3 and 3 and the sprocket wheels 1 and 2, and in this embodiment, an appropriate portion of the connecting shaft 4, for example, an upper portion thereof. In addition, a sliding body Rb composed of a guide roller, a shoe and the like is disposed, and this sliding body Rb is supported by a screen load supporting guide rail Gb laid on the main body frame F along the movement path of the endless chain 3. To do.
[0023]
Further, for the guidance of the screen S, a sliding body Rc composed of a guide roller, a shoe or the like is disposed at an appropriate location of the connecting shaft 4, for example, at its upper and lower ends, and this sliding body Rc is used as a moving path of the endless chain 3. A guide rail Gc for screen guidance laid on the main body frame F is provided so as to be along.
A cover body C is provided on the river guide Rc side of the screen guide guide rail Gc so that the solid matter flowing down the river is not caught by a drive mechanism such as the endless chain 3.
[0024]
In this case, the opening and closing of the screen element 5 is not provided on the intake channel R2 side on the intake channel P2 as shown in FIGS. The screen element 5 can be opened at a right angle to the endless chain 3 so as to open the water intake port P when it is located on the intake channel R2 side due to the water pressure of the flowing flowing water.
In this modified example, a sliding body Ra including a guide roller, a shoe, and the like is disposed via a bracket 4B on an appropriate portion of the connecting shaft 4, for example, an upper portion thereof. By moving along the screen element opening / closing guide rail Ga laid on the main body frame F so as to be substantially along the river R1 side of the movement path, the connecting shaft 4 is rotated, whereby the screen element 5 is connected to the river R1. The screen element 5 is closed when positioned on the side so that the screen element 5 is substantially parallel to the endless chain 3 and covers the water intake P. However, the screen element opening / closing guide rail Ga is not installed at all, The screen element 5 can be opened and closed by the water pressure of the flowing water flowing into the port P.
In this modification, the load of the screen S is supported by the rotary shafts 1S and 2S via the endless chains 3 and 3 and the sprocket wheels 1 and 2, and an appropriate portion of the connecting shaft 4, for example, its upper end A sliding body Rd composed of a guide roller, a shoe and the like is disposed at the position of the endless chain 3, and this sliding body Rd is laid by a screen guide guide rail Gd laid on the body frame F along the movement path of the endless chain 3. I try to guide you.
[0025]
Further, the rotation shaft 2S on which the sprocket wheel 2 is arranged is a rotation in which a concave portion corresponding to the arrangement pitch of the connecting shaft 4 is formed on the peripheral surface at a predetermined interval corresponding to the comb-shaped screen element 5. A scraper 6 is provided.
The rotary scraper 6 rotates together with the rotary shaft 2S, enters between the moving screen elements 5 from the inner peripheral side, and is adsorbed on the outer surface of the screen element 5 on the river R1 side or sandwiched between the screen elements 5. Is removed from the screen element 5 and the screen element 5 is cleaned.
[0026]
In addition, a fixed scraper 7 configured in a comb-like shape is arranged at a predetermined interval corresponding to the comb-like screen element 5 in the main body frame F on the downstream side of the rotating shaft 2S on which the sprocket wheel 2 is disposed. Set up.
The fixed scraper 7 is adsorbed to the outer surface of the screen element 5 on the river R1 side or positioned between the screen elements 5 by positioning the front end of the fixed scraper 7 close to the outer surface of the moving screen element 5 or entering between the screen elements 5. The solid matter sandwiched between the two is separated from the screen element 5 to clean the screen element 5 and to prevent the solid matter flowing down the river R1 from entering the water intake P.
[0027]
In addition, a fixed screen 8 configured in a comb-like shape is arranged on the main body frame F on the upstream side of the rotary shaft 1S on which the sprocket wheel 1 is arranged, with a predetermined interval corresponding to the comb-like screen element 5. Set up.
This fixed screen 8 prevents the solid matter flowing down the river R1 from entering the water intake port P by positioning its front end close to the outer surface of the moving screen element 5 or entering between the screen elements 5. Is.
[0028]
Furthermore, the installation positions of the rotary shafts 1S and 2S are such that solids flowing down the river R1 move smoothly in the downstream direction in accordance with the movement of the screen element 5 without staying in front of the screen S, and directly into the river R1. By setting the upstream side and the downstream side from the intake port P so as to return and flow down, closed walls W1 and W2 are formed on the back side (intake channel R2 side), and the installation positions of the rotary shafts 1S and 2S It is desirable to configure so that the flow rate of the flowing water decreases.
[0029]
In this solid matter entry preventing device at the intake port, the screen element 5 is attached in a comb-like shape to a connecting shaft 4 that is rotatably laid between a pair of endless chains 3 and 3 that are circulated. Even if the solids flowing down the river R1 are adsorbed on the outer surface of the screen element 5 constituting the screen S on the river R1 side, the endless chains 3 and 3 are driven to circulate to match the movement of the screen element 5. It moves to the downstream direction one by one, returns to the river R1 as it is, and flows down.
[0030]
Moreover, the screen element 5 located on the river R1 side covers the intake port P by closing when the screen element 5 is located on the river R1 side and opening when the screen element 5 is located on the intake channel R2 side. In addition to preventing solids flowing down the river R1 from entering the intake port P, the screen element 5 located on the intake channel R2 side has resistance to flowing water that has passed through the screen element 5 covering the intake port P. Therefore, the flowing water can be smoothly introduced into the intake channel R2.
[0031]
【The invention's effect】
According to the solid matter entry blocking device of the water intake port of the present invention, the screen element is attached in a comb-teeth shape to a connecting shaft that is pivotably spanned between a pair of endless chains that are circulated. Even if the solids flowing down the river are adsorbed to the outer surface of the screen element constituting the screen, the endless chain is driven to circulate and move in the downstream direction as the screen element moves. Thus, the solid matter flowing down the river is prevented from being trapped or staying in the intake port, and the solid matter can be prevented from flowing into the intake port.
In addition, the solid matter entry prevention device at the intake port can keep the intake performance constant without causing clogging of the screen, and the screen elements constituting the screen can greatly protrude toward the river side. In addition, the maintenance management of the apparatus can be simplified in combination with the fact that the screen is not damaged by the flow-through or the like.
The screen element closes when it is located on the river side and opens when it is located on the intake channel side, so that the screen element located on the river side covers the intake port and flows down the river. Is prevented from entering the intake port, and the screen element located on the intake channel side does not provide resistance to flowing water that has passed through the screen element covering the intake port, and can smoothly introduce the flowing water into the intake channel. .
Further, a guide rail for opening and closing the screen element is arranged along the water intake, and the connecting shaft is rotated by a sliding body composed of a guide roller, a shoe and the like that moves along the guide rail for opening and closing the screen element. By opening and closing the screen element, the screen element can be reliably operated so that it closes when it is located on the river side and opens when it is located on the intake channel side.
[0032]
Also, by arranging a scraper on the downstream side of the water intake, the solid matter sandwiched between the screen elements is adsorbed on the outer surface of the river-side screen element, and returned to the river to flow down. be able to.
[0033]
In addition, by forming a rake on the outer surface of the connecting shaft or screen element at an appropriate interval, when the solid material flowing down the river stays in front of the screen, the retained solid material is removed from the connecting shaft and screen. The element can be forcibly moved in the downstream direction in accordance with the movement of the element.
[Brief description of the drawings]
FIG. 1 is a plan view showing an embodiment of a solid matter entry preventing device for a water intake according to the present invention.
FIG. 2 is a side view of the same.
FIG. 3 is a front view of the same.
FIG. 4 is a side view of the guide rail.
FIG. 5 is a plan view showing a modified example of the solid matter entry preventing device for a water intake port of the present invention.
FIG. 6 is a plan view showing a modified example of the solid matter entry preventing device for a water intake port of the present invention.
FIG. 7 is a side view of the guide rail.
FIG. 8 is a plan view of the same.
[Explanation of symbols]
R1 River R2 Intake channel S Screen P Inlet 1 Sprocket wheel 1S Rotating shaft 2 Sprocket wheel 2S Rotating shaft 3 Endless chain 4 Connecting shaft Ra, Rb, Rc, Rd Slide body Ga Screen element opening / closing guide rail Gb Screen load support guide Rail Gc Screen guide guide rail Gd Screen load support guide rail 5 Screen element 6 Rotating scraper 7 Scraper

Claims (3)

A pair of endless chains that are stretched substantially horizontally along the intake port of the intake channel and are driven to circulate, and extend in a vertical direction spanning the endless chain so as to be rotatable with a predetermined interval. a connecting shaft, with at predetermined intervals in the connecting shaft attached to the comb-Ri Do and a screen element extending in the horizontal direction has a length to reach the connecting shaft to which the tip is adjacent river side endless chain In order to circulate and drive the screen element located in the river so that it moves in the down stream direction of the river, and to close when the screen element is located on the river side and open when it is located on the intake channel side A guide rail for opening and closing the screen element is arranged along the mouth and connected by a sliding body that moves along the guide rail for opening and closing the screen element. The by turning operation, solid entrance block device intake, characterized in that so as to open and close the screen element. 2. A solid matter intrusion prevention device for a water intake according to claim 1 , wherein a scraper is disposed downstream of the water intake. The apparatus for preventing solid matter intrusion at a water intake according to claim 1 or 2, wherein a rake is formed on the outer surface of the connecting shaft or the screen element at an appropriate interval.

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