JP2008101374A - Dust prevention device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a dust prevention device which rotates a roller without pulling a suspended matter into it, and thereby prevents degradation of a dust prevention function. <P>SOLUTION: The dust prevention device 10 prevents a suspended matter in a water current from passing through an intake 3 from the front of the intake in a diversion weir 1 and flowing behind the intake, and is provided with a dust prevention part 11, a moving means B, and a pulling-in prevention means A. The dust prevention part 11 is a section for preventing the suspended matter from flowing into a head race 5, is installed in front of the intake, is connected with a water intake part 1b of the diversion weir 1, is substantially vertically extended in the direction of water intake in the intake, and floats in the water current. The moving means B is a means for moving the dust prevention part in the vertical direction, and has support columns 33, 53 connected with the diversion weir 1 and extending in the vertical direction and rollers 34, 54 connected with the dust prevention part 11 and sliding on side faces of the support columns 33, 53. The pulling-in prevention means A prevents the rollers 34, 54 from rotating while pulling the suspended matter into them. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention is a dustproof device, and in particular, a dustproof device that prevents floating matters in a water stream from flowing from the front of the intake weir to the downstream of the intake port through the intake port.

  Conventionally, a water intake weir is installed in a stream such as a river or a dam, and water taken from the water intake of the water intake weir may be used as agricultural water, industrial water, or power generation water.

  There are many cases where leaves, wood fragments, garbage, etc. are floating in the water flow. However, when the collected water is used as agricultural water, industrial water, power generation water, etc., there is no floating substance in the water. preferable. Therefore, generally, by attaching a fence-like screen to the intake port, the floating substance is prevented from flowing downstream from the intake port. However, in places where there are many floating substances or large floating objects, the intrusion of floating objects may not be prevented by the screen alone. In that case, a dustproof device is installed upstream of the screen.

As disclosed in Patent Documents 1 and 2, etc., the dustproof device is installed upstream of the water intake weir so as to close the water intake, and is configured to be movable following the water level of the water flow. Specifically, the dustproof device includes a dustproof portion, a support column, and a roller, and rotates the roller to move the support column in the vertical direction, thereby moving the dustproof portion in the vertical direction. Therefore, even if the water level of the water flow changes, the dust-proof portion moves following the water level, so that floating substances can be prevented from flowing downstream.
JP-A-6-10333 Japanese Patent Laid-Open No. 9-71927

  However, in the dustproof devices disclosed in Patent Documents 1 and 2 and the like, since the support column is H-shaped steel, there is a risk that suspended matter in the water flow will adhere to the surface of the support column and get caught in the roller. And if a suspended | floating matter is caught in a roller, rotation of a roller will become dull and, as a result, the movement to the up-down direction of a support | pillar will be suppressed. Therefore, although the dustproof device is configured to be movable following the water level, the dustproof device may not be able to move in the vertical direction, and the dustproof function cannot be performed.

  This invention is made | formed in view of this point, The place made into the objective is to provide the dustproof device which a roller can rotate without entraining a suspended | floating matter.

  The dustproof device of the present invention is a dustproof device that prevents floating substances in the water flow from flowing from the front of the intake of the intake weir to the rear of the intake through the intake. Specifically, it is installed in front of the intake and connected to the intake weir, extends substantially perpendicular to the intake direction at the intake and floats in the water flow, and suspended matter is drawn from the front of the intake. A dust-proof portion that prevents flow through the mouth to the rear of the water intake, a column that is connected to the water intake weir and extends in the vertical direction, and a roller that is connected to the dust-proof portion and slides on the side of the column vertically. It comprises moving means for moving the dust-proof portion in the vertical direction by sliding, and entrainment preventing means for preventing the roller from entraining and rotating the suspended matter.

  With such a configuration, there is a low possibility that the suspended matter is caught in the roller, and as a result, it is possible to prevent the dust-proof function of the dust-proof device from being lowered.

  Here, the water flow may be a natural water flow such as a river or an artificial water flow such as a dam. Moreover, a water flow direction means the direction through which water flows in a water flow.

  The dust-proof portion may be connected to the intake weir by connecting a part of the dust-proof portion to the intake weir, and extends from the intake weir toward the front of the intake port as in a preferred embodiment described later. It may be connected to the intake weir via the section.

  In the dustproof device of the present invention, the entrainment prevention means preferably has an adhesion prevention structure in which a portion of the side surface of the column that is slid by the roller prevents adhesion of suspended matter. The roll-in preventing means is formed so that the roller side surface can come into contact with the column side surface of the columnar column. Thus, since the roller side surface is formed so as to be able to come into contact with the column side surface, there is a low possibility that suspended matter in the water flow will enter between the roller side surface and the column side surface.

  Here, “the portion of the side of the column on which the roller slides” includes not only the portion of the side of the column on which the roller slides but also the periphery of the side of the column on which the roller slides. It includes the side of the column that is separated from the side of the column by the size of the suspended object.

  Moreover, in the dustproof apparatus of this invention, it is preferable that a moving means is a means to make a dustproof part move following the water level change of the water surface in a water flow. With such a configuration, even if the water level in the water flow changes, it is possible to prevent the suspended matter from flowing downstream.

  According to the present invention, the roller can rotate without entraining the suspended matter.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In addition, this invention is not limited to embodiment shown below.

  In the present embodiment, as an example of the dustproof device, a dustproof device attached in front of a water intake port for taking water for hydroelectric power generation is cited, and the configuration and operation of the dustproof device will be described with reference to FIGS. 1 to 5. FIG. 1 is a view of the dustproof device 10 as viewed from above. FIG. 2 is a view of the dustproof device 10 as viewed from the upstream side. 3 is a perspective view of the first and third connection portions 31, 51, FIG. 4 is a view of the first and third connection portions 31, 51 from above, and FIG. 5 is a diagram of the first connection. It is the figure which looked at the part 31 from the side. In addition, the water intake front is an upstream side of the water intake direction with respect to the water intake, and is a front side of the water intake portion 1b in FIG. The rear side of the water intake is on the downstream side in the water intake direction with respect to the water intake, and in FIG. 1 is on the back side with respect to the water intake portion 1b.

  In a hydroelectric power plant, water is generally taken from a natural stream such as a river or an artificial stream such as a dam, and the collected water is dropped from a high place to a low place. To generate electricity. Specifically, a water intake weir 1 is installed in a water stream such as a river. The intake weir 1 includes a weir body 1a and a water intake 1b. The weir body 1a extends substantially perpendicular to the water flow direction, and the water intake 1b is substantially parallel to the water flow direction. It is installed extending. A water intake 3 is formed in the water intake 1b.

  The water intake 3 is opened substantially perpendicular to the water flow direction, and a fence-like screen 7 is attached as shown in FIGS. 1 and 2. A dustproof device 10 is installed in front of the screen 7 (in front of the water intake). As a result, floating substances such as leaves, wood fragments, and dust floating in rivers and dams are attached to the surface of the dust-proof portion 11 of the dust-proof device 10 and the surface of the screen 7, and therefore flow into the water conduit 5. As a result, the power generation efficiency in the power generation unit can be improved. On the other hand, the water in the water stream flows from the front of the water intake through the water intake to the rear of the water intake, flows into the power plant through the water conduit 5, falls to the power generation unit, and rotates the water wheel in the power generation unit.

  Then, the structure of the dustproof apparatus 10 is shown using FIG. 1 thru | or FIG.

  As shown in FIG. 1, the dustproof device 10 includes a dustproof portion 11, protruding portions 21 and 21, a first connection portion 31, second connection portions 41 and 41, and third connection portions 51 and 51. The dust-proof portion 11 has a left end fixed to the shore and a right end attached to the weir body portion 1 a via the first connection portion 31, and each protruding portion 21 via each second connection portion 41. It is connected to the. Each protruding portion 21 is connected to the water intake portion 1 b via each third connection portion 51.

  As shown in FIG. 1, the dust-proof part 11 is installed in front of the water intake port rather than the water intake part 1b. Specifically, as shown in FIGS. 1 and 2, the dust-proof portion 11 includes a plurality of floats 13, 13,... Arranged in a steel frame (not shown), and the adjacent floats 13, 13 are ropes 14. It is connected to each other via. Therefore, the dust-proof part 11 prevents flowing into the water conduit 5 by attaching a floating substance to the surface.

  As shown in FIG. 1, each protruding portion 21 extends from the intake portion 1 b at the periphery of the intake port 3 to the front of the intake port and is connected to the dust-proof portion 11. Further, each protruding portion 21 is floated in the water flow by the floats 23 and 23 in the steel frame 22, and can be moved following the water level of the water flow.

  As shown in FIG. 1, the first connecting portion 31 is a portion where the right end of the dust-proof portion 11 is connected to the dam body portion 1 a, and as shown in FIGS. 3 and 4, a cylinder 32 and a support column made of a fence. 33, a pair of rollers 34, buffer materials 35, 35, and floats 36, 36. The cylinder 32 is arranged to extend in the vertical direction, accommodates the column 33 with the longitudinal direction aligned, and accommodates the roller 34 and the cushioning materials 35, 35.

  As shown in FIG. 5, the support column 33 is a columnar steel pipe that protrudes from the water surface and is connected to the weir body 1 a and has a smooth surface.

  The pair of rollers 34 is in contact with the support column 33 and is rotatably attached to the inner wall surface of the cylinder 32. Therefore, as shown in FIG. 4, the pair of rollers 34 is brought into contact with the side surface of the column 33 without forming a gap. Therefore, it is possible to prevent floating matters in the water stream from being sandwiched between the support column 33 and the pair of rollers 34. That is, the wrapping prevention means A in the dustproof device 10 is formed such that the roller side surfaces of the pair of rollers 34 can come into contact with the support column 33.

  Also, the pair of rollers 34 slides up and down the side surfaces of the columns 33 following the water level of the water flow by the buoyancy of the floats 36 and 36. Thereby, the dust-proof part 11 can be made to follow the water level of the water surface in a water flow, and can be moved to an up-down direction. That is, the moving means B in the dustproof device 10 is that the pair of rollers 34 slide on the side surfaces of the support 33.

  As shown in FIG. 4, the cushioning materials 35, 35 are attached to the inner wall surface of the cylinder 32 without contacting the column 33, and the left and right shaking of the column 33 when the roller 34 slides on the side of the column 33. For example, it is made of synthetic rubber or wood board.

  As shown in FIG. 1, each 3rd connection part 51 has connected the water intake part 1b of the water inlet 3 periphery, and each protrusion part 21, and has a component substantially the same as the 1st connection part 31. ing. That is, each third connection portion 51 includes a cylinder 52 made of a fence, a support column 53, a pair of rollers 54, cushioning materials 55 and 55, and floats 56 and 56. Each cylinder 52 is arranged to extend in the vertical direction, accommodates 53 struts with the longitudinal direction aligned, and accommodates a roller 54 and cushioning materials 55, 55.

  Each strut 53 is a cylindrical steel pipe that protrudes from the water surface and is connected to the water intake portion 1b and has a smooth surface.

  Each pair of rollers 54 is in contact with each column 53 and is rotatably attached to the inner wall surface of each cylinder 52. Therefore, each pair of rollers 54 is brought into contact with the side surface of each column 33 without opening a gap. Therefore, it is possible to prevent floating matters in the water flow from being sandwiched between the respective columns 53 and the pair of rollers 54. That is, the wrapping prevention means A in the dustproof device 10 is formed so that the roller side surfaces of each pair of rollers 54 can come into contact with each column 53.

  The pair of rollers 54 slides on the side surfaces of the columns 53 in the vertical direction following the water level of the water flow by the buoyancy of the floats 56 and 56. Thereby, the dust-proof part 11 can be made to follow the water level of the water surface in a water flow, and can be moved to an up-down direction. That is, the moving means B in the dustproof device 10 is that the pair of rollers 54 slide on the side surfaces of the support column 53.

  As shown in FIG. 4, the buffer materials 55, 55 are attached to the inner wall surface of each cylinder 52 without contacting each column 53, and each column 53 when the roller 54 slides on the side surface of each column 53. It is made of, for example, synthetic rubber or wood board.

  As described above, the dustproof device 10 includes the moving means B. By the moving means B, the dust-proof part 11 and the protruding parts 21 and 21 can be moved up and down following the water level of the water surface in the water flow. For this reason, even if the water level changes, it is possible to prevent the floating substance from flowing into the water conduit 5, and thus it is possible to prevent a decrease in the dustproof function due to the change in the water level.

  Further, the dustproof device 10 is provided with a winding prevention means A. Therefore, it is possible to prevent the suspended matter from being caught between each column 33 and the pair of rollers 34 or between each column 53 and the pair of rollers 54, and as a result, the rotation of the pair of rollers 34 and 54 becomes slow. Can be prevented. Therefore, the dust-proof part 11 and the protruding parts 21 and 21 can be moved reliably following the water level of the water surface in the water flow, and thus the dust-proof function can be prevented from being lowered due to entrainment of floating substances.

  In addition, since the pair of rollers 34 and 54 are accommodated in the cylinders 32 and 52, the suspended matter is prevented from floating in the vicinity of the rollers 34 and 54 by the cylinders 32 and 52. Thereby, the fall of the dustproof function by the entrainment of a suspended | floating matter can be further prevented.

  Moreover, since the dustproof part 11 is arrange | positioned ahead of a water intake by the length of the longitudinal direction of the protruding parts 21 and 21 rather than the water intake part 1b, when the dustproof part is arrange | positioned so that a water intake may be plugged up Compared to the above, the dustproof function can be improved.

  In the present embodiment, the dustproof device 10 is attached in front of a water intake for taking in water for hydroelectric power generation. However, the dustproof device is installed at a water intake for taking in water for hydroelectric power generation. It is not limited to.

  In addition, if the winding prevention means A is a means for preventing the pair of rollers 34 and 54 from entraining the floating material and sliding the side surfaces of the support pillars 33 and 53, the specific contents of the means are particularly It is not limited. For example, the entanglement prevention means A only needs to have an adhesion prevention structure in which the portion of the side surface of the column on which the roller slides prevents adhesion of suspended matter. For example, each column may be a prism, and each pair of rollers may be formed so as to be able to contact the side surface of the column.

  Moreover, although the dust-proof part 11 was connected with the water intake part 1b via the protruding parts 21 and 21, for example, without using members other than dust-proof parts, such as a protruding part, both ends of a dust-proof part are attached. Even if the central part of the dust proof part is placed upstream of the water weir in contact with the water intake weir, the dust proof function can be improved as compared with the dust proof device in which the dust proof part is arranged so as to close the water intake. .

  In addition, a device that scrapes floating substances attached to the surface of the dust-proof unit 11 or the surface of the screen 7 may be attached to the dust-proof unit 11 or the intake weir 1.

  Moreover, the 1st connection part 31 does not need to be provided with the winding prevention means A. FIG. That is, the support 33 of the first connection portion 31 may be an H-shaped rope. The reason is as follows. Since water such as rivers and dams is taken from the intake 3, most floating substances float in the water near the intake 3. Therefore, it is unlikely that the floating material floats near the first connection portion 31. Therefore, even if the support 33 is an H-shaped rope, it is considered that there is little possibility that the floating material is caught between the support and the roller. is there.

  The pair of rollers 34 and 54 can be moved following the water level in the water flow by the floats 36 and 56, respectively, but may be movable by the following configuration. That is, the pair of rollers 34 and 54 are controlled by the drive device and the water level detection device to slide vertically on the side surfaces of the columns 33 and 53. Here, the drive device is a device that drives the rotation of the rollers 34 and 54, and the water level detection device detects the water level of the water surface in the water flow so that the dust-proof portion 11 follows the water level of the water surface in the water flow. This is a device for sliding the rollers 34 and 54 on the side surfaces of the columns 33 and 53.

  As described above, the present invention is useful for a dustproof device.

It is the figure which looked at the dustproof device from the upper part. It is the figure which looked at the dustproof device from the upstream. It is a perspective view of the 1st and 3rd connection part. It is the figure which looked at the 1st and 3rd connecting part from the upper part. It is the figure which looked at the 1st connection part from the side.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Intake weir 3 Intake port 10 Dust-proof device 11 Dust-proof part 21 Protruding part 33, 53 Post 34, 54 Roller A Entrainment prevention means B Movement means

Claims (5)

A dust-proof device that prevents floating matter in the water stream from flowing from the front of the intake of the intake weir to the rear of the intake through the intake,
It is installed in front of the water intake and connected to the water intake weir, extends substantially perpendicular to the water intake direction at the water intake, and floats in the water flow. A dust-proof portion for preventing the water from flowing backward through the water intake port,
A column connected to the intake weir and extending in the vertical direction; and a roller connected to the dust proof portion and sliding on the side surface of the column in the vertical direction; and a moving means for moving the dust proof portion in the vertical direction by sliding of the roller; ,
A dust prevention device, comprising: a winding prevention means for preventing the roller from taking up and rotating the suspended matter. The dustproof device according to claim 1, wherein
The wrapping prevention means is a dustproof device having an adhesion prevention structure in which a portion of a side surface of a column that slides on the roller prevents adhesion of the suspended matter. The dustproof device according to claim 2,
The adhesion preventing structure is a dustproof device in which a roller side surface is formed so as to be able to contact a column side surface of a columnar column. The dustproof device according to claim 1, wherein
The said moving means is a dustproof apparatus which is a means to make the said dustproof part move following the water level change of the water surface in the said water flow. The dustproof device according to claim 1, wherein
The dust-proof device is a dust-proof device connected to the intake weir via a protruding portion that extends from the intake weir toward the front of the intake port.

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