JP5042152B2 - Fish intrusion prevention device - Google Patents

Description

  The present invention relates to a device for preventing fish and other aquatic animals from entering a water intake or a water discharge channel of a water utilization facility such as a hydroelectric power plant.

  In a hydroelectric power plant, by connecting a water intake to a reservoir or the like provided upstream from the dam body, the water taken from the water intake is caused to flow down and the water turbine is rotated, thereby driving the generator. In addition to generating electricity, the used water is discharged from the discharge channel to the river. In addition, reservoirs that serve as water intakes usually have a large number of fish such as fish descending from the upstream side of the river and fish that have gone up through the attached fishway. If the fish intrudes into the water intake, it may damage the fish or adversely affect the growth of the fish, which may cause losses to the fishermen in the river. Moreover, there was a possibility of causing the same problem as described above on the discharge channel side.

For this reason, the applicant of the present application arranges at intervals as shown in Patent Document 1, for example, as an apparatus installed in the boundary water area between a water intake or a discharge channel and a river in order to prevent fish from getting in. A plurality of metal tubes that extend from the surface of the water to below the surface of the water, each metal tube is provided with a metal chain suspended in the water through the inside of the metal tube, and the metal chain out of the metal tube From a metal tube, a rocking member attached so as to be able to rock with respect to a portion suspended in water, a metal lid attached to a metal chain and capable of colliding with an upper portion of the metal tube positioned on the water, Developed a fish intrusion prevention device that has a drive mechanism that forcibly moves the suspended metal chain through the wire, and propagates the collision sound between the metal lid and the metal tube into the water, Avoid intrusion into water intake or discharge channel Unishi to have.
JP 2005-226321 A

  However, the boundary water area between the water intake and the river where this fish intrusion prevention device is installed is strongly affected by fluctuations in the water intake of the power plant, and it was crossed across the boundary water area by increasing or decreasing the water intake. The state of the net field also changes as it bends or becomes linear due to water pressure. When the amount of water intake is relatively large, as shown in FIG. As a result, the metal lid 104 is lifted to a position far away from the upper portion of the metal tube 105, so that the power source of the drive mechanism 106 is operated and connected to the wire 103. Even if the metal chain 107 is pulled up or down, the metal lid 104 does not collide with the top portion 105a of the metal tube 105 located on the water, and does not generate a hitting sound that repels fish. Theft is a concern.

  In addition, when the water intake amount is relatively small, as shown in FIG. 11, the water pressure is not so much applied to the mesh field 101, so that when the mesh field 101 maintains a straight state, the wires 102 and 103 are relaxed. Accordingly, even if the power source of the drive mechanism 106 is driven, the metal chain 107 connected to the wire 103 cannot be appropriately pulled up or down, so that the metal lid 104 is placed on the water of the metal tube 104. There is a concern that it does not collide with the top 105a located at the position and does not generate a striking sound that repels fish.

  Therefore, the present invention can be installed in a place with large fluctuations in the amount of water such as a water intake or a water outlet, and can reliably generate a sound to avoid fish even if affected by the fluctuations in the amount of water. An object of the present invention is to provide a fish intrusion prevention device.

  A fish intrusion prevention device according to the present invention is installed in a water area near a water intake or a water discharge channel of a water use facility, and the fish intrusion prevention device prevents the fish from entering the water intake or the water discharge channel. It can be installed in a tubular shape that extends from above the water surface to below the water surface, and the water intake port or the water discharge channel is placed in the water area in front of the water intake port or the water discharge channel while being spaced apart from each other. A plurality of tubular members arranged across and a plurality of structural members that are arranged and connected to a portion on the water side coming out of the tubular body. A striking sound generating mechanism for generating a striking sound by colliding with a body, a power source, a main wire for power transmission directly connected to the power source, and a power source for moving the striking sound generating mechanism Main wire for transmission One end side is connected via a connecting tool, and has a drive mechanism that is configured at least from a power transmission branch wire that is connected to the other end of the hammering sound generating mechanism and that is farthest from the water surface. (Claim 1). The tubular body is made of a material that has a strength against impact such as metal and that generates a relatively loud impact sound when it collides with another object. Moreover, the structural member which comprises a striking sound generation mechanism is comprised with the metal plate etc. which generate | occur | produce a comparatively big striking sound, when it collides with another thing, having the intensity | strength with respect to impacts, such as metal. For example, a motor is used as a power source for the drive mechanism. The operation along the vertical direction of sending the power transmission branch wire to the striking sound generating mechanism and returning it to the power source is performed using, for example, a fixed pulley.

  As a result, when the power source is operated and the power transmission main wire is sent out to the impact sound generating mechanism, the net is bent due to the relative increase in the amount of water, and the power transmission main wire is stretched. Therefore, even if the end of the branch wire for power transmission is separated from the impact sound generating mechanism and the constituent member farthest from the water surface of the impact sound generating mechanism does not collide with the pipe body, the water surface of the impact sound generating mechanism is the most water surface. By making a component close to the tube close to the tube, the component closest to the water surface can collide with the tube. In addition, when the power source is operated and the main wire for power transmission is sent to the striking sound generating mechanism side, the net field remains linear due to the relative decrease in the amount of water. Even if the component closest to the water surface remains in contact with the pipe body, the component farthest from the water surface can be lifted up even if the component closest to the water surface remains in contact with the tube. By doing so, the constituent member farthest from the water surface can collide with the constituent member adjacent thereto.

  The striking sound generating mechanism is configured such that adjacent constituent members among the constituent members are connected by a flexible member, and a through hole is provided in each constituent member to form an edge of one opening of the tubular body. It is characterized by being attached to a protruding portion extending from (claim 2). As a result, it is possible to interlock the necessary parts among the respective constituent members according to the tension state of the branch wire for power transmission, and it is possible to prevent the constituent members from falling off and shifting in the left-right direction. It is possible to make the downward movement of the member along the vertical direction, the collision of the structural member closest to the water surface to the tube, the collision of the structural member farthest from the water surface and the adjacent structural member Can be reliably performed in a relatively wide range.

  A stopper for preventing the hitting sound generating mechanism from coming off is attached to the tip of the protrusion extending from the edge of the one opening of the tubular body (Claim 3). Thereby, even if the situation which raises the structural member of a striking sound generation mechanism larger than the longitudinal direction dimension of a projection part arises, it can prevent that a structural member pulls out from the projection part of a tubular body.

  In the fish intrusion prevention device according to the present invention, the movement distance value of the end of the coupling member on the branch wire for power transmission by the operation of the power source is always constant, and along the longitudinal direction of the protruding portion of the tubular body. The dimension of the power transmission branch wire is set to the sum of the movement distance value of the connector side end and the maximum movement distance value along the radial direction of the power transmission main wire due to the curvature of the mesh field. (Claim 4). As a result, the net field is curved due to the relative increase in the amount of water, and the power transmission main wire is stretched. Because the power source is relatively large, even if the power source is operated and the power transmission main wire is sent out to the striking sound generating mechanism side, the coupling side end of the power transmission branch wire is moved away from the power source. In addition, it is possible to avoid the problem that the structural member of the impact sound generating mechanism does not collide with the tubular body.

  In the fish intrusion prevention device according to the present invention, the power transmission branch wire is configured such that the power transmission branch wire of the power transmission branch wire caused by the operation of the power source is always constant while the movement distance value of the connector side end is always constant. Even when the main wire is stretched to the maximum extent, it has a dimension capable of obtaining a moving distance value of the coupling tool by operation of the power source, and a distance value between the structural member of the impact sound generating mechanism and the tubular body is It is characterized in that it is set so as to be equal to or relatively smaller than the moving distance value of the connector due to the operation of the power source (Claim 5). As a result, the net field is curved due to the relative increase in the amount of water, and the position of the power transmission branch wire on the side of the connector side is the power as the power transmission main wire is fully stretched. Even when the power source is moved relatively far from the power source side, if the power source is operated and the connecting device side end of the power transmission branch wire is moved away from the power source, the components of the impact sound generating mechanism Of these, the component closest to the water surface can collide with the tube.

  In the fish intrusion prevention device according to the present invention, the power transmission branch wire is configured such that the power transmission main wire is relaxed to the maximum while the movement distance value of the coupler due to operation of the power source is always constant. However, the distance between the uppermost constituent member of the impact sound generating mechanism and the subsequent constituent member is determined so that the moving distance value of the connector can be obtained by the operation of the power source. It is characterized by being set so as to be equal to or relatively smaller than the moving distance value of the connector according to (Claim 6). As a result, the position of the end of the power transmission branch wire on the side of the coupling tool from the power source is reduced because the power transmission main wire is in a relaxed state because the net is linear due to a relative decrease in the amount of water. Even when the power source is operated relatively far away, when the power transmission branch wire is moved away from the power source, the power transmission branch wire is moved away from the power source. A distant component can collide with an adjacent component.

  As described above, according to these inventions, when the power source is operated and the main wire for power transmission is sent to the impact sound generating mechanism side, the net field is curved due to the relative increase in the amount of water, and the power Even if the end of the power transmission branch wire is separated from the striking sound generation mechanism due to the tension of the transmission main wire, and the constituent member farthest from the water surface of the striking sound generation mechanism does not collide with the tubular body The structural member closest to the water surface in the impact sound generating mechanism is brought close to the tubular body, so that the structural member closest to the water surface can collide with the tubular body. In addition, when the power source is operated and the main wire for power transmission is sent to the striking sound generating mechanism side, the net field remains linear due to the relative decrease in the amount of water. Even if the component closest to the water surface remains in contact with the pipe body, the component farthest from the water surface can be lifted up even if the component closest to the water surface remains in contact with the tube. By doing so, the constituent member farthest from the water surface can collide with the constituent member adjacent thereto. Therefore, it is possible to reliably generate a striking sound that avoids fish regardless of the tension of the power transmission main wire.

  In particular, according to the second aspect of the present invention, it is possible to interlock the necessary components among the respective constituent members according to the tension state of the power transmission branch wire and to prevent the constituent members from falling off and shifting. It is possible to make the movement of the component member toward the water surface side along the vertical direction, the collision of the component member closest to the water surface to the tube, the component member farthest from the water surface It is possible to reliably perform a collision with a constituent member adjacent thereto in a relatively wide area.

  In particular, according to the third aspect of the present invention, even when a situation occurs in which the constituent member of the impact sound generating mechanism is lifted larger than the longitudinal dimension of the protrusion, the constituent member is prevented from coming off from the protrusion of the tubular body. be able to.

  In particular, according to the fourth aspect of the present invention, the power transmission branch wire coupler is caused by the fact that the net is bent due to the relative increase in the amount of water and the power transmission main wire is stretched. Since the position of the side end is relatively close to the power source side, the power source is operated and the power transmission main wire is sent to the striking sound generating mechanism side to drive the coupling side end of the power transmission branch wire. Even if it is moved away from the mechanism, it is possible to avoid the problem that the structural member of the impact sound generating mechanism does not collide with the tube and does not generate an impact sound that avoids fish.

  In particular, according to the invention described in claim 5, the power transmission branch wire is caused by the fact that the net field is bent due to the relative increase in the amount of water, and the power transmission main wire is stretched to the maximum. Even when the position of the connector side end of the power tool is relatively large toward the drive mechanism side, when the power source is operated and the connector side end of the power transmission branch wire is moved away from the drive mechanism, Since the distance value between the structural member farthest from the water surface and the tube body is larger than the moving distance value of the connecting tool due to the operation of the power source, the sound generating mechanism is closest to the water surface side. It is possible to avoid the problem that the structural member does not collide with the tube and does not generate a striking sound that avoids fish.

  In particular, according to the invention described in claim 6, the power transmission main wire is in a relaxed state to the maximum because the net is linear due to the relative decrease in the amount of water. Even when the position of the branch wire side end of the branch wire is relatively far from the power source side, when the power source is operated and the link side end of the power transmission branch wire is moved away from the power source In the impact sound generating mechanism, since the distance value between the constituent member farthest from the water surface and the constituent member adjacent thereto is larger than the moving distance value of the coupler due to the operation of the power source, the impact sound generating mechanism. Among these, it is possible to avoid the problem that the constituent member farthest from the water surface does not collide with the constituent member adjacent to the constituent member and does not generate a striking sound that avoids fish.

  Hereinafter, an example of an embodiment of the present invention will be described with reference to the accompanying drawings.

  FIG. 1 shows an enlarged view of a water intake 1 for taking water into a water use facility such as a hydroelectric power plant, for example. This water intake 1 is provided adjacent to the fishway 2 on the upstream side and is a reservoir. 3 is provided. In the intake port 1, a dust removing screen 5 having a plurality of steel bars arranged in front of the intermediate piers 4a, 4b, 4c, 4d, 4e on the reservoir 3 side is provided on both side peers 6a, 6b. Are provided with a predetermined interval (for example, 0.75 m) across the entire width. The upstream three gates are provided with electric screens 7 for repelling fish by energization immediately downstream of the dust removing screen 5, and the downstream three gates are rotated by a mesh-like screen to provide a water channel between the peers. A rotating screen 8 is provided for physically blocking the intrusion of fish.

  The downstream two intermediate piers 4b and 4e and the downstream side pier 6b are provided with an opening 9 for allowing fish to come and go in front of the rotary screen 8 in the closed gate position. The space between the rotary screen 8 and the fishway 2 is communicated.

  In front of the intake 1 and the opening of the fishway 2 adjacent thereto, at least a downstream intermediate beam 10a extending from the upstream side pier 6a to the reservoir 3 side and a downstream extending from the downstream side pier 6b to the reservoir 3 side. The nets 12 and 13 are provided between the side intermediate beam 10b and between the downstream side intermediate beam 10b and the mooring point 11 facing the intermediate beam 10b, and dust such as driftwood enters the intake 1 and the fishway 2. It is designed to prevent this.

  As shown in FIG. 2, the nets 12 and 13 are configured by housing a float 15 in a steel cage box 14, and are known per se, and are connected to a binding rope 16. It rises and falls according to the fluctuation of the water surface.

  Then, in the water area (reservoir 3) in the vicinity of the water intake 1, fish intrusion prevention is performed in front of the water inlet 1 before the water inlet 1 on the opposite side of the screen 5 with the net 12 as a reference line. A device 17 is arranged.

  As shown in FIGS. 1 to 3, the fish intrusion prevention device 17 is a tubular device having both sides open to the opposite side of the screen 5 with respect to the intake port 1 with the net 12 as a reference line. A plurality of metal pipes 18 (also referred to as metal pipes) 18 arranged at intervals, and the other opening 18 by passing through the pipe 18 from one opening 18a. A metal chain 19 (henceforth also referred to as a metal tube chain) 19 suspended in water and a swingable swinging member 20 attached to a portion of the chain 19 exposed from the tube body 18 to the water are provided. is doing.

  In this example, the total width of the water intake 1 (the width between the intermediate beams 10a and 10b) is about 30 m, so that a total of 19 nets 12 are arranged, and the pipe body 18 is Two nets 12 are provided for each net 12, and therefore, a total of 38 pipes 18 are arranged at intervals of about 2 m. However, even if the total width dimension of the water intake 1 is about 30 m, it is not necessarily limited to the number of such nets 12 and pipes 18. Moreover, in this example, the dimension along the longitudinal direction of the tubular body 18 is 2.5 m, and the length of the chain is 7 m.

  As shown in FIG. 3, the pipe body 18 is fixed to the rope yard 12 by appropriate means such as welding or a bracket at two locations in the vertical direction of the netting field 12. It is provided so as to extend in a substantially vertical direction from above the water surface to below the water surface.

  The swing member 20 is configured to have a metal color tape 22 such as a silver tape or a fluorescent tape formed in a predetermined size, for example, and as shown in FIGS. Multiple are installed with open. For example, when the dimension along the longitudinal direction of the tube body 18 is 2.5 m as described above, the rocking member 20 has the metal color tape 22 attached at intervals of 1 m from the lower end side of the tube body 18. It is configured by attaching five each.

  As shown in FIG. 3, the side of the chain 19 opposite to the side suspended in water is connected to the impact sound generating mechanism 24.

  As shown in FIG. 4, the hitting sound generating mechanism 24 is configured to have metal plates 25, 26, 27 having three rectangular (square) shapes and flat sides facing each other in this example. Yes. Among these, the metal plate 25 farthest from the water surface side has an arch-shaped protrusion 28 for connecting the chain 19 to the tube body 18 side as shown in FIGS. 4 and 6 to 9 and will be described later. An arch-shaped protrusion 29 for connecting the power transmission branch wire 41 is provided on the side opposite to the tubular body 18. The middle metal plate 26 adjacent to the metal plate 25 and the metal plate 27 closest to the water surface side are provided with through holes 30 into which the protrusions 28 of the metal plate 25 can be inserted, and the overlapping direction of the metal plates 25, 26, 27. Is formed so as to extend along. However, the metal plate 27 may not necessarily have the through hole 30 unless the projection 28 of the metal plate 25 reaches the metal plate 27.

  The metal plate 25 and the metal plate 26, and the metal plate 26 and the metal plate 27, as shown in FIG. 4 and FIG. 6 to FIG. They are connected by a connecting member 31 such as a line. A flange 33 having the same shape as that of the metal plates 25 to 27 is formed on the opening 18a side of the tubular body 18, and two rod-shaped projections 34 extending from the flange 33 along the axial direction of the tubular body 18 are provided. The through holes 35 into which the projections 34 can be inserted are formed in the metal plates 25, 26, 27 so as to extend along the overlapping direction of the metal plates 25, 26, 27. Further, a stopper having an outer diameter larger than the inner diameter of the through hole 35 of the metal plates 25, 26, and 27 in order to prevent the metal plates 25 to 27 from being pulled upward at the tip of the protrusion 34. 36 is mounted.

  As shown in FIGS. 1, 2, and 5, the impact sound generating mechanism 24 can be moved up and down along the vertical direction of the metal plates 25, 26, and 27 by a drive mechanism 37.

  As shown in FIGS. 2, 3, and 5, the drive mechanism 37 is connected to a motor 38 that is a power source installed in the downstream intermediate beam 10 b and a rotating body 38 a of the motor 38 to be connected to the mesh field 12. As with the connecting rope 16 connecting the two, the upstream intermediate beam 10a and the downstream intermediate beam 10b are installed, and the overall length thereof is larger than the linear dimension from the upstream intermediate beam 10a to the downstream intermediate beam 10b or expands and contracts. The power transmission main wire 39 is connected to the power transmission main wire 39 via a connector 40, and extends from the connector 40 to a certain range along the power transmission main wire 39, and then fixed. By being hooked on the pulley 42, it is installed on the power transmission branch wire 41 extending downward in the substantially vertical direction toward the impact sound generating mechanism side, and the upstream intermediate beam 10a. One end of the elastic body 44 is a main configuration is the other end with being fixed to the anchoring plate 45 is connected to the power transmission main wire 39 is configured to have an elastic mechanism 43. In addition, what is shown with the code | symbol 46 shown in FIG. 2 is a turnbuckle.

  As shown in FIG. 3, the fixed pulley 42 is provided on the upper surface of the column 47 by fixing a substantially inverted L-shaped column 47 on the upper surface of the net 12 near the metal tube 18. It has been made. These struts 47 are not provided corresponding to all the metal pipes 18, and are provided at intervals of two (a ratio of one to three), for example, as shown in FIG. 2. .

  According to the above configuration, when the motor 38 is operated so that the rotating body 38a rotates in the direction of feeding out the power transmission main wire 39, the power transmission branch wire 41 connected to the power transmission main wire 39 is also connected to the connector side. Since the end moves away from the motor 38 and the end of the power transmission branch wire 41 opposite to the connector side is close to the tube body 18 side, the striking sound generating mechanism 24 is moved substantially vertically to the tube body 18 side. There is a force to try to descend. When the motor 38 is operated so that the rotating body 38a rotates in the direction in which the power transmission main wire 39 is wound, the power transmission branch wire 41 connected to the power transmission main wire 39 is also connected to the motor 38 at the connector side end. Since the end of the power transmission branch wire 41 opposite to the connector side is separated from the tubular body 18 side, a force for lifting the impact sound generating mechanism 24 from the tubular body 18 side in a substantially vertical direction is generated. Arise.

  Next, in such a drive mechanism 37, the distance value L1 from the motor 38 to the connector 40 shown in FIG. 5 is a fluctuating value that varies within a certain range, and the movement of the connector 40 due to the operation of the motor 38 is performed. The distance value L2 is preferably a fixed value, as will be described later, and the distance value L3 from the connector 40 to the fixed pulley 42 is a variable value that is inversely proportional to the distance value L1, and the fixed pulley 42 to the pipe 18 The distance value L4 is a fixed value because of its structure.

  That is, as shown in FIG. 10B, since the amount of water is the largest, the elastic body 44 extends to the maximum when the net 12 is bent to the maximum in the direction opposite to the water inflow direction, and the power transmission main wire When 39 is curved to the maximum extent, the distance value L1 becomes the minimum value, and the amount of water is the smallest as in FIG. 11B, so that the net 12 is downstream from the upstream intermediate beam 10a. When the elastic body 44 is not extended at all and the power transmission main wire 39 is in a relaxed state over the intermediate beam 10b, the distance value L1 becomes the maximum value. In a situation where the distance value 1 is the minimum value, the power transmission branch wire 41 is in a state where the connector side end is closest to the motor 38 (a state farthest from the fixed pulley 42), as shown in FIG. Therefore, in the situation where the distance value L3 is the maximum value and the distance value 1 is the maximum value, the power transmission branch wire 41 is farthest from the motor 38 as shown in FIG. Therefore, the distance value L3 is the minimum value.

  On the other hand, even when the power transmission main wire 39 is bent to the maximum extent or when the power transmission main wire 39 is in a relaxed state, the power transmission main wire 39 is activated by the operation of the motor 38. The longitudinal dimension value L5 of the protrusion 34 extending from the flange 33 of the pipe body 18 is assumed to have a longitudinal dimension that can secure a moving distance value L2 that is a fixed value of the connector 40. And the maximum movement distance value Lx along the radial direction of the power transmission main wire 39 due to the curvature of the net 12 (from the distance value L1 shown in FIG. 8 to the distance value shown in FIG. 6). And a value obtained by subtracting L1).

  Next, regarding the connecting members 31 that connect the metal plates 25, 26, and 27 of the striking sound generation mechanism 24, the maximum dimension from the metal plate 25 to the metal plate 27 is increased when the metal plate 25 is lifted until it hits the stopper 36. The power transmission main wire 39 is set to be equal to or larger than the maximum movement distance value Lx along the radial direction. Accordingly, even when the metal plate 25 is lifted until it hits the stopper 36, the distance value between the metal plate 27 and the flange 33 of the tube 18 is as shown in FIG. It is equal to or smaller than the movement distance value L2.

  As a result, as shown in FIG. 6, the distance value L1 from the motor 38 to the coupling tool 40 becomes the minimum value, and accordingly, the distance value L3 from the coupling tool 40 to the fixed pulley 42 becomes the maximum value ( Even when the amount of water is the maximum), the connector 40 can move in a direction away from the motor 38 by a distance value L2 (a direction approaching the fixed pulley 42), and the metal plate 27 and the flange 33 of the tubular body 18 Becomes a numerical value of the distance value L2 or less while being separated.

  As a result, when the motor 38 is operated to pull the connector 40 and the power transmission main wire 39 is pulled out so that the power transmission branch wire 41 is separated from the motor 40, as shown in FIG. Since the plate 27 descends in a substantially vertical direction and collides with the flange 33 of the tubular body 18, a striking sound can be generated.

  Further, as shown in FIG. 8, the power transmission branch wire 41 has a maximum distance value L1 from the motor 38 to the connector 40, and accordingly, a distance value L3 from the connector 40 to the fixed pulley 42. Is the minimum value (situation where the amount of water is minimum), the value obtained by subtracting the dimension from the connecting member 40 to the fixed pulley 42 with respect to the total length is the distance between the metal plate 25 and the metal plate 27. The dimension is set such that the metal plate 25 can be lifted so as to be equal to or smaller than the movement distance value L2 of the connector 40 due to the operation of the motor 38.

  As a result, when the motor 38 is operated and the connector 40 is pulled and the power transmission main wire 39 is pulled out so that the power transmission branch wire 41 is separated from the motor 40, as shown in FIG. Since the plate 25 descends in a substantially vertical direction and collides with the metal plate 26, a striking sound can be generated.

  In the fish intrusion prevention device 17, the chain 19 collides with the inner peripheral surface of the pipe body 18 to generate a striking sound, and the metal color tape 22 can threaten the fish, so that water intake can be further increased. It is possible to prevent fish from entering the mouth 1.

  Lastly, it has been explained that the fish intrusion prevention device 17 has been used in front of the intake 1 of the hydroelectric power plant, but the net field is curved due to the influence of the increase and decrease of the water discharge amount in the water discharge channel of the hydroelectric power plant. Thus, the power transmission main wire is stretched, or the net is linear, but the power transmission main wire is relaxed, so that it can be used as it is in the vicinity of the water discharge channel.

FIG. 1 is a plan view showing a configuration example provided in front of a water intake port with respect to the entire structure of the fish intrusion prevention apparatus according to the present invention. FIG. 2 is a front view showing the entire structure of the fish intrusion prevention device shown in FIG. 1 as seen from the front side. FIG. 3 is a cross-sectional view taken along line AA in FIG. FIGS. 4A and 4B are enlarged views for explaining the impact sound generating mechanism of the fish intrusion prevention apparatus. FIG. 4A is a front view thereof, and FIG. 4B is a plan view thereof. FIG. 5 is a schematic view of a drive mechanism for moving the impact sound generating mechanism. FIG. 6 illustrates a situation in which the distance from the motor to the coupling tool becomes the minimum value because the amount of water to be taken in is the maximum, and the metal plate and tube on the most water surface side of the striking sound generating mechanism also in this situation. It is explanatory drawing which shows that the distance value with is the same as the movement distance of the connection tool by operation of a motor. FIG. 7 is an explanatory diagram showing a situation in which the motor is operated from the situation of the impact sound generating mechanism shown in FIG. 6 to lower the metal plate on the most water surface side of the impact sound generating mechanism and collide with the tubular body to generate an impact sound. It is. FIG. 8 illustrates the situation where the distance from the motor to the coupling tool is the maximum because the amount of water taken in is minimal, and in this situation also the metal plate farthest from the water surface side of the impact sound generating mechanism It is explanatory drawing which shows that the distance value with the metal plate adjacent to this is the same as the movement distance of the connection tool by operation | movement of a motor. FIG. 9 shows a situation in which the motor is operated from the state of the hitting sound generating mechanism shown in FIG. 8 and the metal plate farthest from the water surface of the hitting sound generating mechanism is lowered, and the hitting sound is generated by colliding with the adjacent metal plate. It is explanatory drawing which shows. FIG. 10 is a conventional example showing a state in which the net body is bent and the wire is stretched because the amount of water taken in is maximum, and the metal lid of the impact sound generating mechanism does not collide with the tube body. FIG. 11 is a conventional example showing a state in which the net body is linear because the amount of water taken in is minimal, the wire is in a relaxed state, and the metal lid of the impact sound generating mechanism is not lifted.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Water intake 12, 13 Net place 17 Fish intrusion prevention device 24 Blow sound generation mechanism 25, 26, 27 Metal plate (component)
31 Connecting member 34 Protrusion 35 Through hole 36 Stopper 37 Drive mechanism 38 Motor (drive source)
39 Power Transmission Main Wire 41 Power Transmission Branch Wire 42 Fixed Pulley

Claims (6)

In a fish intrusion prevention device that is installed in a water area near a water intake or a water discharge channel of a water utilization facility and prevents the fish from entering the water intake or the water discharge path,
It can be installed in a tubular shape with both sides open and extending from above the water surface to below the water surface, and the water intake port or the water area in front of the water discharge channel is spaced from each other while being spaced apart from each other. A plurality of pipes arranged across the discharge channel,
Composed of a plurality of structural members that are arranged on the water side of the tubular body and connected to each other, and the structural members or the structural members collide with the tubular body to generate a striking sound. Sound generation mechanism,
For moving the impact sound generating mechanism, one end side is connected via a power source, a main wire for power transmission directly connected to the power source, and the main wire for power transmission and a coupling tool, A fish intrusion prevention device comprising: a member that is farthest from the water surface among the constituent members of the striking sound generating mechanism; and a drive mechanism that is at least composed of a power transmission branch wire connected to the other end.   The striking sound generating mechanism is configured such that adjacent constituent members among the constituent members are connected by a flexible member, and a through hole is provided in each constituent member to form an edge of one opening of the tubular body. The fish intrusion prevention device according to claim 1, wherein the fish intrusion prevention device is attached to a protrusion extending from the top.   The fish intrusion prevention according to claim 2, wherein a stopper for preventing the hammering sound generating mechanism from coming off is attached to a tip portion of a projection extending from an edge of one opening of the tubular body. apparatus.   The power transmission branch wire has a dimension along the longitudinal direction of the protruding portion of the tubular body, while keeping the movement distance value of the connector side end of the power transmission branch wire by the operation of the power source always constant. The set of the movement distance value of the connector side end and the maximum movement distance value along the radial direction of the power transmission main wire due to the curvature of the mesh field is set to Or the fish intrusion prevention apparatus of 3 or 3.   The power transmission branch wire is a case where the power transmission main wire is stretched to the maximum while the movement distance value of the connector side end of the power transmission branch wire by operation of the power source is always constant. However, the distance between the structural member of the hitting sound generation mechanism and the tube has a dimension that can obtain the moving distance value of the connecting tool due to the operation of the power source, and the moving value of the connecting tool due to the operation of the power source. The fish intrusion prevention device according to any one of claims 1 to 4, wherein the fish intrusion prevention device is set to be equal to or relatively smaller than the distance value.   The branch wire for power transmission keeps the moving distance value of the connector due to operation of the power source constant, and the connector due to operation of the power source even when the main wire for power transmission is relaxed to the maximum. The distance value between the uppermost constituent member of the hitting sound generation mechanism and the constituent member subsequent thereto is the same as the moving distance value of the connector due to the operation of the power source. It is set so that it may become relatively smaller than this value, The fish intrusion prevention apparatus in any one of Claim 1 to 4 characterized by the above-mentioned.

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