JP5224911B2 - Canal screen - Google Patents

Description

This invention relates to a water channel screen for removing dust provided in the water flow portion, in particular, it relates to a water channel SCREEN that can be easily fixed can prevent vibration.

  Conventionally, mesh screens have been installed in water passages such as water intakes and water tanks that have a fast passage velocity, so that the dust that has flowed by the water flow is received by the screen so that it does not flow downstream, and this dust can be removed. (For example, refer to Patent Document 1 below.) This screen may generate a Karman vortex downstream depending on the flow velocity of the water flow. When the Karman vortex is generated, the screen may vibrate, which may result in a continuous resonance state. In this case, local metal fatigue occurs on the screen, which may cause damage or breakage of the screen. Even when a design is made so as to avoid a specific resonance region, the actual fluid flow velocity in front of the screen is often not constant, which may cause resonance in different resonance regions.

  Conventionally, with respect to such screen vibration, 1. A screen bar connecting a plurality of screens and a spacer are fixed by welding, and screens (panels) are fixed to each other by a connecting material. It is conceivable to fix the screen bars located at both ends of the screen to structures such as surrounding concrete. In this way, it is conceivable to make the screen itself a highly rigid structure.

JP 2005-299293 A

  However, the above 1.2. By taking both measures, the effect of preventing resonance can be demonstrated. Since the screen bar and the concrete part at both ends that take measures against the above are existing structures, the opening size of the opening between the screen bar and the concrete part is not constant and is different, so it is difficult to securely fix and fix them both . If such close contact and fixing cannot be performed, the occurrence of resonance cannot be prevented.

  In order to measure the opening dimension with certainty, it is necessary to investigate the water channel with no water, and there is a problem that an increase in overflow power and an investigation cost for measurement occur. In addition, after measuring the opening size of the opening, it is necessary to produce an insert such as a hardware suitable for the opening. For example, it is necessary to process and install the insert on the installation site of the screen. It took time and effort to fix the screen.

The present invention, in order to solve the problems in the conventional technology. Simple structure can closely fix the opening between the screen and the structure, to provide a water channel SCREEN capable of preventing screen resonance of With the goal.

In order to solve the above-described problems and achieve the object, a channel screen according to the present invention is a channel screen provided at an opening of a channel to prevent entry of dust, and the structure of the channel. Provided between the end of the screen panel, the width is freely changeable according to the interval, and includes an interval adjusting member that joins and fixes the structure and the screen panel. The interval adjusting member has an inclined surface. A pair of wedge-shaped metal fittings, the width of which can be changed by sliding on the inclined surface, and a flat metal fitting fixed to the structure body on which the spacing adjusting member is disposed. The flat plate fitting has a lower support surface that supports the lower surface of the gap adjusting member, and the gap adjusting member is disposed and fixed between the flat plate fitting and the screen panel .

Further, the channel screen according to the present invention is characterized in that the pair of wedge-shaped metal fittings are provided with a step contacting the concave and convex shape along the sliding direction of the inclined surface .

Further, in the water channel screen of the present invention, the screen panel includes: a screen bar extending in the height direction of the water channel; and a plurality of flat bars provided in the height direction horizontally and fixing the screen bar at a predetermined interval. The spacing adjusting member is provided at a position of one or a plurality of screen bars provided at an intermediate position among the plurality of screen bars provided in the height direction .

  According to this invention, even when the distance between the structure of the water channel and the screen panel is not constant, the structure, the screen panel, and the screen panel are adjusted via the distance adjustment member by adjusting the distance by the distance adjustment member. The gap between the gaps can be eliminated. As a result, the screen panel can be firmly fixed to the structure, and damage to the screen panel can be prevented even if Karman vortices occur due to changes in the water flow or the like.

  According to the channel screen according to the present invention, even if the interval between the structure and the screen panel is not constant, the gap can be filled by changing the width by the interval adjusting member. Thereby, there exists an effect that a structure and a screen panel can be firmly fixed by an easy operation | work with a simple structure.

(Embodiment)
With reference to the accompanying drawings, illustrating a preferred embodiment of the water channel SCREEN according to the present invention in detail. FIG. 1 is a perspective view showing a water channel screen according to an embodiment of the present invention. This water channel screen 100 is roughly constituted by a screen panel 101 and a distance adjusting fixture 102.

  The screen panel 101 is provided in a water channel such as a water intake or a water tank. In the example of FIG. 1, a structure 150 made of concrete or the like on both sides forms a water intake 155 having a predetermined width and height. The illustrated example is a state in which the screen panel 101 is installed in the water intake 155, and the screen panel 101 is positioned in front of the direction (water flow) X in which the lower side flows and the upper side is positioned in the rear of the water flow. It has an obtuse predetermined angle and is installed in an inclined shape.

  The screen panel 101 includes a flat screen bar 111 that is long in the vertical direction in the figure, and a flat bar 112 that extends in the horizontal direction to join and fix the screen bar 111 at a predetermined interval. At the time of manufacture, it is manufactured as a screen panel 101 having a predetermined width and height adapted to the water intake 155. As shown in the figure, the screen panel 101 is composed of block bodies 101a to 101d divided into a plurality (4 in the illustrated example) in the width direction, and the side portions of the block bodies 101a to 101d are joined to each other using a spacer 114. It can also be configured.

  At both ends of the screen panel 101, a plurality of fixtures for fixing to the structure 150 are provided in the vertical position. A fixture 160 provided at the position of the flat bar 112 near the upper end and the lower end (located underwater and not shown) is fixed to the structure 150 via bolts or the like. In addition, a plurality of (two in the illustrated example) flat bars 112 provided at intermediate positions in the height direction are provided with interval adjusting fixtures 102.

  FIG. 2 is an exploded perspective view showing the interval adjusting fixture. The interval adjusting fixture 102 is composed of a flat plate fitting 201 attached to the structure 150 shown in FIG. 1 and a pair of wedge fittings 210. A pair of fixing bolts 151 project from the structure 150 in advance at the position where the screen panel 101 is attached. The fixing bolt 151 can be provided when the structure 150 is placed in concrete, or can be provided by anchoring after the structure 150 is constructed. The pair of fixing bolts 151 are provided approximately horizontally with a predetermined interval.

  The flat metal plate 201 is a flat metal plate, and is inserted into the fixing bolt 151 protruding from the structure 150 through the fixing hole 201a opened corresponding to the interval between the pair of fixing bolts 151, and is used for fixing. The nut 202 is fastened and fixed. After fixing, the flat metal fitting 201 and the fixing nut 202 are fixed by welding. The flat metal fitting 201 is in a horizontal state along the water flow X as shown in the figure while being fixed to the structure 150.

  The wedge-shaped bracket 210 includes a pair of a wedge-shaped bracket 211 having an inclined surface 211a and a fixed surface 211b, and another wedge-shaped bracket 212 having the same shape as the wedge-shaped bracket 211 and having an inclined surface 212a and a fixed surface 212b. . As shown in the figure, the inclined surface 211a and the inclined surface 212a are arranged symmetrically so as to be joined to each other. The wedge-shaped metal fittings 210 (211, 212) have a length that is less than or equal to the length between the pair of fixing holes 201 a provided in the flat metal fitting 201, and the height is substantially the same as or less than that of the flat metal fitting 201. It is height. As for the width, when the pair of wedge-shaped brackets 210 (211, 212) are combined as shown in the figure, the width is about the distance between the structure 150 and the screen panel 101.

  FIG. 3 is a top view showing a state in which the screen panel is attached using the interval adjusting fixture. On the structure 150 side, the fixing bolt 151 of the structure 150 is inserted into the fixing hole 201a of the flat metal fitting 201, and then the fixing nut 202 is screwed into the fixing bolt 151 and tightened. Thereby, the flat metal fitting 201 is fixed to the structure 150. In this state, a gap with a predetermined interval W is generated between the flat plate 201 on the structure 150 side and the screen bar 111 at the end of the screen panel 101. The gap adjusting fixture 102 is inserted into this gap portion.

  As a specific insertion method, a pair of wedge-shaped metal fittings 210 (211, 212) are inserted into the gaps in such a manner that the inclined surfaces 211 a, 212 a are joined together. Thereafter, the pair of wedge-shaped fittings 210 (211 and 212) are slid relative to each other along the length direction (water flow X) and shifted (indicated by bidirectional arrows in the figure) to thereby form a pair of wedge-shaped brackets. The space | interval of the fixed surfaces 211b and 212b in the metal fitting 210 (211 and 212) can be changed.

  At this time, first, in a state where the size in the width direction of the wedge-shaped bracket 210 (211, 212) is reduced, the fixed surface 211 b of one wedge-shaped bracket 211 faces the flat plate bracket 201, and the other wedge-shaped bracket 212 The fixed surface 212b is arranged at a position facing the screen bar 111 of the screen panel 101. Thereafter, the wedge-shaped bracket 210 (211, 212) is arranged so that the fixed surface 211 b of one wedge-shaped bracket 211 is in contact with the flat plate bracket 201 and the fixed surface 212 b of the other wedge-shaped bracket 212 is in contact with the screen bar 111 of the screen panel 101. Increase the size in the width direction. Thereby, a gap between the screen bar 111 at the end of the screen panel 101 and the structure 150 can be eliminated.

  With the gap between the screen bar 111 at the end of the screen panel 101 and the structure 150 eliminated, the flat metal fitting 201, the spacing adjustment fixture 102, and the screen bar 111 at the end of the screen panel 101 are Fix by welding. More specifically, first, the fixing bolt 151 and the fixing nut 202 of the flat metal fitting 201 are welded. Thereafter, welding is performed between the flat plate 201 and the fixed surface 211b of the wedge-shaped bracket 211, between the inclined surfaces 211a and 212a of the wedge-shaped brackets 211 and 212, and between the fixed surface 212b of the wedge-shaped bracket 212 and the screen bar 111, respectively. To do. You may change the order of welding of each part.

  Here, it can fix firmly by fixing in the state in which the center point of wedge-shaped metal fittings 210 (211 and 212) is located in the center of the screen bar 111. FIG. That is, if the center of the screen bar 111 and the center point of the wedge-shaped metal fittings 210 (211 and 212) are deviated from each other, they cannot be firmly fixed to each other.

  Therefore, even if the interval W between the structure 150 and the screen bar 111 at the end of the screen panel 101 is not constant, the wedge-shaped brackets 211 and 212 of the interval adjusting fixture 102 can be adapted to the interval W. Can be filled without gaps. As a result, the screen panel 101 can be firmly joined to the structure 150 at an intermediate position in the height direction without a gap, and even if a Karman vortex is generated due to a change in water flow, the screen panel 101 resonates. Does not occur, and the occurrence of damage and the like due to resonance can be prevented.

  In the above configuration, the distance adjusting fixture 102 has a length direction along the water flow X, so that the resistance surface against the water flow X can be reduced, and loss of the water flow can be reduced. Thereby, even if the interval adjusting fixture 102 is provided, unnecessary vortex generation is not caused. By the way, in the example shown in FIG. 1 in the above embodiment, the interval adjustment fixtures 102 are provided corresponding to the positions of the flat bars 112 provided at two intermediate positions of the screen panel 101. The number of the fixtures 102 may be provided at the position of the flat bar 112 provided according to the height of the screen panel 101. If there is one flat bar 112, at least one interval adjusting fixture 102 is provided per side. The same effect can be obtained even if two or more of the plurality are provided as long as the resonance is avoided.

(Other embodiments)
Next, another embodiment of the present invention will be described. These configurations are modified examples for positioning the wedge-shaped metal fitting 210 in the height direction. FIG. 4 is a perspective view showing a modification of the flat metal fitting. A lower support surface 203 is formed by bending the lower support surface 203 at a right angle on the lower surface of the flat metal plate 201 having the configuration shown in FIG. Alternatively, the lower support surface 203 may be joined to the flat metal fitting 201 by welding. As a result, the lower support surface 203 supports the lower surface of the wedge-shaped metal fitting 210 (211, 212) while maintaining the position in the height direction during the interval adjustment work or during welding. In addition, it is possible to prevent the wedge-shaped fitting 210 from falling off during the interval adjustment work or welding.

  FIG. 5 is a perspective view showing a modified example of the wedge-shaped metal fitting. This is a configuration in which steps are provided on the inclined surfaces 211a and 212a of the wedge-shaped bracket 210 (211 and 212) shown in FIG. As shown in the figure, the inclined surface 211a and the inclined surface 212a each have a step, the convex inclined surface 212aa is in contact with the concave inclined surface 211aa, and the concave inclined surface is in the convex inclined surface 211ab. 212ab touches. By this step, the height direction can be positioned between the inclined surfaces 211a and 212a of the wedge-shaped metal parts 211 and 212, and the shift in the height direction can be prevented. Thereby, the position of the wedge-shaped metal parts 211 and 212 in the height direction can be positioned during the interval adjustment work or welding, and workability can be improved.

  In the above configuration, the configuration in which the lower support surface 203 is provided on the flat metal fitting 201 shown in FIG. 4 and the configuration in which the wedge-shaped metal fitting 210 (211 and 212) shown in FIG. Workability during welding can be further improved.

  According to the embodiment described above, even when the distance between the structure and the screen panel is not constant, there is no need to measure the distance on the spot or manufacture a metal fitting corresponding to the distance. The intermediate portion in the height direction of the panel can be firmly fixed to the structure body with no gap by the interval adjusting fixture. Further, the work itself for fixing without the gap can be easily performed by the wedge-shaped metal fitting, and the workability can be improved. Since the interval adjusting fixture is composed of two wedge-shaped fittings having the same shape, handling of parts can be facilitated. Moreover, even when the distance between the structure and the screen panel is different at the upper and lower arrangement positions in the same place, the different distance can be filled using the same distance adjusting fixture, and the number of parts is increased. There is nothing to do.

  As described above, the channel screen according to the present invention is useful for a screen panel that removes dust from the channel, and is particularly suitable for a screen panel installed in a channel where the water flow changes.

It is a perspective view which shows the screen for waterways by embodiment of this invention. It is a disassembled perspective view which shows a space | interval adjustment fixing tool. It is a top view which shows the attachment state of the screen panel using a space | interval adjustment fixture. It is a perspective view which shows the modification of a flat metal fitting. It is a perspective view which shows the modification of a wedge-shaped metal fitting.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Screen for water channel 101 Screen panel 102 Space | interval adjustment fixing tool 111 Screen bar 112 Flat bar 150 Structure 151 Fixing bolt 155 Water intake 160 Fixing tool 201 Flat plate metal fitting 202 Fixing nut 210 (211 and 212) Wedge-shaped metal fitting 211a, 212a Inclination Surface 211b, 212b Fixed surface

Claims (3)

In the screen for a water channel provided at the opening of the water channel to prevent the entry of dust,
Provided between the structure of the water channel and the end of the screen panel, the width can be changed according to the interval, and includes an interval adjusting member that joins and fixes the structure and the screen panel ,
The interval adjusting member is composed of a pair of wedge-shaped fittings having an inclined surface, and the width can be changed by sliding the inclined surface,
On the structure side, provided with a flat metal fitting fixed to the structure for arranging the spacing adjustment member,
The flat metal fitting has a lower support surface that supports the lower surface of the interval adjusting member,
The water channel screen , wherein the spacing adjusting member is disposed and fixed between the flat metal fitting and the screen panel . The water channel screen according to claim 1, wherein the pair of wedge-shaped metal fittings are provided with a step that comes into contact with an uneven shape along a sliding direction of the inclined surface . The screen panel is composed of a screen bar extending in the height direction of the water channel and a plurality of flat bars provided in the height direction horizontally and fixing the screen bar at a plurality of predetermined intervals.
The interval adjustment member among the plurality of said screen bars provided the height direction, according to claim 1 or 2, characterized in that provided at the position of one or more of the screen bars provided at an intermediate position waterway for screen.

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