JP6005691B2 - Water intake equipment - Google Patents

Description

  The present invention relates to a water intake device for taking water from a river or the like in a hydroelectric power plant or the like.

  When water is taken from a mountain river or the like at a hydroelectric power station and there is no power supply and automatic control is not possible, the opening of the water intake gate is adjusted by a manual hoist to take a predetermined amount of water. Since there is no power source, the opening of the intake gate is fixed and no operation according to the water level is performed. Therefore, when the river water level rises, the water intake increases, and when the river water level decreases, the water intake decreases.

  By the way, with regard to river water intake, water use permission has been obtained in advance, and water intake exceeding the permitted water volume is not allowed. Therefore, it is necessary to set a fixed opening so that the water intake amount does not exceed the permitted water amount even at the highest water level assumed. Therefore, there is a problem that the amount of water intake at a normal low water level is small, and clean hydraulic energy cannot be used effectively.

  For this reason, for example, Patent Document 1 proposes a technique of lowering the auxiliary gate by raising the float accompanying the rise in water level and closing the intake gate by the auxiliary gate when the water level rises.

JP 2011-102482 A

  However, if the water intake gate is closed to limit the water intake accompanying the rise in the water level, the water intake gate may continue to be closed even if the water level subsequently drops, and the water intake may be insufficient. When the amount of water intake is insufficient, for example, the generator of the hydroelectric power plant may stop.

  An object of this invention is to provide the water intake apparatus which suppresses that the amount of water intake is insufficient even if a water level falls.

  In order to solve the above-described problems and achieve the object, a water intake device of the present invention is a water intake device that is disposed in a water channel and controls the amount of water flowing in the water channel. A water intake gate that forms a water intake opening between the water channel and the bottom of the water channel; a gate support portion that supports the water intake gate so that the lower end of the water intake gate is not in contact with the water channel; A lock part that is attached to the gate support part and prevents the intake gate from moving up and down by fixing the gate support part, and is provided on the upstream side of the intake gate of the water channel, on the upstream side of the intake gate A float that moves in the vertical direction as the water level of the waterway moves, and a float that is attached to the float and moves in the vertical direction as the float moves and the float rises to a predetermined position. A rod that releases the fixing of the gate support portion of the lock portion, and a flow rate that is provided at a lower end portion of the intake gate and changes the shielding amount of the opening portion according to the water level of the water channel upstream of the intake gate. And an adjustment unit.

  This water intake device has a lock portion that releases the fixation of the water intake gate when a predetermined water level is reached, and also has a flow rate adjustment portion that changes the shielding amount of the opening according to the water level of the water intake. Therefore, the water intake device can suppress a shortage of water intake by adjusting the shielding amount of the opening even when the water level subsequently decreases while suppressing water intake exceeding the permitted water amount.

  In the water intake apparatus, the flow rate adjusting unit is provided along a lower end portion of the intake gate, and extends downward from the lower end portion of the intake gate in a vertical direction, and a downstream side of the flowing water of the plate portion. A floating body portion having buoyancy, a lower end portion of the intake gate and an upper end portion of the plate portion, and the plate portion between the lower end portion of the intake gate and the upper end portion of the plate portion. A connecting portion that is rotatably connected toward the upstream direction of the flowing water as a rotating shaft, and a rotational moment in the upstream direction of the flowing water due to buoyancy acting on the floating body portion, and the upstream side of the intake gate It is preferable that the amount of rotation of the plate portion changes according to the relationship with the rotational moment in the downstream direction of the flowing water due to the water pressure according to the water level of the water channel. This water intake device can adjust the shielding amount of an opening part more appropriately because a flow volume adjustment part has a floating body part and a board part.

  In the water intake apparatus, it is preferable that the surface of the floating body portion on the side opposite to the plate portion is arcuate. In this water intake device, since the surface of the floating body portion has an arc shape, the flow rate adjusting unit follows the water surface of the water intake port, and the shielding amount of the opening can be adjusted more appropriately.

  In the water intake device, it is preferable that the floating body portion is provided with a groove along a vertical direction on a surface opposite to the plate portion. In this water intake device, by providing a groove in the floating body portion, the flow rate adjusting portion can follow the water surface of the water intake port, and can adjust the shielding amount of the opening portion more appropriately.

  In the water intake apparatus, it is preferable that the plate portion is rotated in a range of 0 degrees or more and 90 degrees or less from a vertically lower direction toward an upstream direction of the flowing water. In this water intake device, the plate portion rotates in the range of 0 degree or more and 90 degrees or less from the vertically downward direction to the upstream direction of the flowing water. Therefore, when the water level at the intake port rises again, And the opening can be more appropriately shielded.

  In the water intake apparatus, it is preferable that the water intake gate has a stopper portion that restricts the descent of the water intake gate to a predetermined lower position. Since this water intake device restricts the descent of the water intake gate to a predetermined position, even if the water level falls, the intake amount is suppressed from being insufficient.

  In the water intake apparatus, it is preferable that the stopper portion includes a display unit that displays the predetermined lowered position of the water intake gate. Since this water intake apparatus displays the predetermined lowered position of the intake gate, the operator can easily recognize the lowered position of the intake gate.

  ADVANTAGE OF THE INVENTION According to this invention, even if a water level falls, it can suppress that water intake is insufficient.

Drawing 1 is a mimetic diagram showing the composition of the water intake device concerning this embodiment. FIG. 2 is a schematic diagram of the water intake device according to the present embodiment viewed from the direction of arrow A in FIG. FIG. 3 is a schematic diagram of the water intake device according to the present embodiment viewed from the direction of arrow B in FIG. FIG. 4 is a schematic diagram showing a water intake and a water outlet. FIG. 5 is a schematic diagram showing the internal structure of the gate support. FIG. 6 is a schematic diagram illustrating the configuration of the flow rate adjusting unit. FIG. 7 is a schematic diagram showing the operation of the water intake device at a predetermined water level at the water intake. FIG. 8 is a schematic diagram showing the operation of the water intake device at a predetermined water level at the water intake. FIG. 9 is a schematic diagram showing the operation of the water intake device at a predetermined water level at the water intake.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In addition, this invention is not limited by this embodiment, Moreover, when there are two or more embodiments, what comprises a combination of each Example is also included.

  Drawing 1 is a mimetic diagram showing the composition of the water intake device concerning this embodiment. FIG. 2 is a schematic diagram of the water intake device according to the present embodiment viewed from the direction of arrow A in FIG. FIG. 3 is a schematic diagram of the water intake device according to the present embodiment viewed from the direction of arrow B in FIG. As shown in FIGS. 1 and 2, the water intake device 10 includes a water intake gate 20, a gate support portion 30, a lock portion 40, a float guide portion 50, a float portion 52, a drive rod 54 as a rod, It has a flow rate adjusting unit 60, a first opening adjustment rod 70, and a second opening adjustment rod 72. The water intake device 10 is disposed in the water channel 11 and takes in the water 100 in the water channel 11 from the water intake 12 provided on the upstream direction X1 side of the water flow 100 with respect to the water intake device 10 while controlling the water intake amount by the water intake gate 20. . The water intake device 10 discharges the taken water 100 from a water outlet 13 provided on the downstream direction X2 side of the water 100 from the water intake device 10.

  FIG. 4 is a schematic diagram showing a water intake and a water outlet. As shown in FIGS. 2 and 4, the water intake 12 is provided in the water channel 11, and the bottom 90 of the water channel 11 and the two water intake walls provided along the flow direction of the flowing water 100 and extending from the bottom 90. 82, 84 and a water intake roof portion 86 connecting the tips of the water intake wall portions 82, 84 are formed in a space. The intake roof portion 86 is provided with an opening 88.

  As shown in FIGS. 3 and 4, the water outlet 13 includes a bottom portion 90 of the water channel 11, two water discharge wall portions 92 and 94 provided along the flow direction of the flowing water 100 and extending from the bottom portion 90, and a water discharge wall. It is formed in a space surrounded by a flooded roof portion 96 in which the tips of the portions 92 and 94 are connected. The vertical height of the water discharge wall portions 92 and 94 is smaller than the vertical height of the water intake wall portions 82 and 84. The water discharge roof portion 96 has a water discharge wall portion 93 that extends vertically upward from the upstream end of the running water 100.

  As shown in FIG. 4, the water intake 12 and the water outlet 13 are the ends of the water intake wall 82, the water discharge wall 92, the water intake wall 84, the water discharge wall 94, and the downstream side X2 of the water intake roof 86. Are connected to each other by connecting the upper end of the water discharge wall portion 93 in the vertical direction. In addition, the water intake 12 should just be that the water intake apparatus 10 can take in the flowing water 100, and a structure is not restricted to this. Moreover, the water outlet 13 should just be that the water intake apparatus 10 can discharge the flowing water 100, and a structure is not restricted to this.

  As shown in FIG. 1, the water intake gate 20 is a wall-shaped member that faces the flow direction of the flowing water 100 and is provided at the intake port 12. In the present embodiment, a part of the surface of the intake water 20 on the downstream direction X2 side of the running water 100 is in contact with the water discharge wall portion 93. The intake gate 20 blocks the flow of the flowing water 100 from the intake port 12 to the outlet port 13 together with the outlet wall portion 93. However, the water intake gate 20 may not be in contact with the water discharge wall portion 93 as long as it stops the flow of the flowing water 100 from the water intake 12 to the water outlet 13.

  In the water intake device 10, a water intake opening 24 is formed by the lower end surface 22 of the water intake gate 20 and the bottom 90 of the water channel 11. The water intake device 10 takes the running water 100 from the water intake 12 through the opening 24 and discharges it to the water outlet 13. The intake gate 20 can be raised and lowered along the vertical direction. The intake gate 20 is lowered downward in the vertical direction to reduce the opening area of the opening 24 and is raised upward in the vertical direction to increase the opening area of the opening 24. A method for raising and lowering the intake gate 20 will be described later.

  FIG. 5 is a schematic diagram showing the internal structure of the gate support. As shown in FIGS. 1 and 5, the gate support portion 30 includes a pinion cover portion 31, a rack cover portion 32, a pinion portion 33, a rack portion 35, and a base portion 37. The gate support part 30 has a rack and pinion structure, and supports the intake gate 20 so that the lower end surface 22 of the water gate 20 does not come into contact with the bottom part 90 of the water channel 11 so as to be movable up and down.

  The pinion cover portion 31 is a box-like member provided in the base portion 71 that is provided in the opening 88 of the intake roof portion 86 and connects the intake roof portion 86 and the water discharge wall portion 93. The pinion cover part 31 houses the pinion part 33, a part of the rack part 35, and the base part 37 therein.

  As shown in FIG. 5, the pinion part 33 is a circular gear having a plurality of teeth 33a, and is attached to the base part 37 so as to be rotatable about the horizontal direction as a central axis. The rack part 35 is a member provided with a plurality of teeth 35a along the axial direction on a flat bar. The rack part 35 is provided along the tangential direction of the outer periphery of the pinion part 33 along the vertical direction. A part of the rack part 35 is accommodated in the pinion cover part 31 and the other part is accommodated in the rack cover part 32. Further, the rack portion 35 is connected to the upper end portion in the vertical direction of the intake gate 20 at the end portion in the lower vertical direction.

  At least one of the teeth 33a of the pinion portion 33 and the inter-tooth spaces 35b between the plurality of teeth 35a of the rack portion 35 are engaged with each other. The pinion part 33 transmits its own rotational movement to the rack part 35 and moves the rack part 35 in the vertical direction. Similarly, the rack unit 35 transmits its own vertical movement to the pinion unit 33 to rotate the pinion unit 33. In the present embodiment, the clockwise rotational movement of the pinion part 33 is interlocked with the movement of the rack part 35 in the vertical downward direction. Further, the counterclockwise rotational movement of the pinion part 33 is linked to the upward movement of the rack part 35 in the vertical direction. However, these relations may be reversed, and the clockwise rotational movement of the pinion part 33 may be interlocked with the movement of the rack part 35 in the vertical direction.

  Since the rack part 35 is connected to the intake gate 20, the intake gate 20 moves up and down as the rack part 35 moves in the vertical direction. A lever is attached to the pinion part 33, and when the operator turns the lever, the pinion part 33 is rotated, and the rack part 35 and the water intake gate 20 can be moved up and down manually.

  Further, a lock part 40 is attached to the pinion part 33. The lock part 40 extends from the upper part in the vertical direction of the intake roof part 86 toward the pinion part 33. As shown in FIGS. 1 and 5, the lock portion 40 is a rod-like member, and includes a contact portion 42, a fulcrum portion 44, and a fixing portion 46. The contact portion 42 is one end portion of the lock portion 40 and is provided at the upper portion in the vertical direction of the intake roof portion 86. The fixing portion 46 is the other end portion of the lock portion 40, and meshes with the inter-tooth space 33 b of the pinion portion 33. The fulcrum part 44 is provided between the contact part 42 and the fixed part 46. The fulcrum part 44 is fixed to the base part 71 and supports the lock part 40 in a rotatable manner. In the lock portion 40, the supported portion 45 between the fulcrum portion 44 and the contact portion 42 is supported from below in the vertical direction by the support portion 43 attached to the base portion 71. Since the lock part 40 is supported by the support part 43, the supported part 45 can be rotated in the direction away from the support part 43 from the position where the supported part 45 is supported by the support part 43. It does not rotate from the position supported by the support part 43 toward the support part 43. That is, in the present embodiment, the lock portion 40 can rotate clockwise from the position where the supported portion 45 is supported by the support portion 43, but does not rotate counterclockwise.

  As described above, the fixing portion 46 of the lock portion 40 meshes with the interdental portion 33 b of the pinion portion 33. The lock part 40 fixes the pinion part 33 and locks the rotation of the pinion part 33. More specifically, since the lock part 40 is supported by the support part 43, the pinion part 33 is prevented from rotating clockwise. That is, the lock part 40 fixes the rack part 35 and the intake gate 20, fixes the intake gate 20 in a predetermined position, and suppresses that the intake gate 20 moves to the downward direction of a perpendicular direction.

  The lock part 40 rotates clockwise around the fulcrum part 44 by the contact part 42 being flipped up by the drive rod 54. The lock part 40 rotates clockwise around the fulcrum part 44, so that the meshing between the fixing part 46 of the lock part 40 and the interdental teeth 33b of the pinion part 33 is released. If the engagement between the fixing portion 46 of the lock portion 40 and the inter-tooth 33b of the pinion portion 33 is released, the pinion portion 33 can rotate clockwise. And the fixation of the rack part 35 and the intake gate 20 is cancelled | released, and the intake gate 20 falls by dead weight.

  As shown in FIG. 1, the float guide portion 50 is a cylindrical member that is open at both ends. The float guide part 50 is provided in the water intake 12 by the outer periphery being supported by the opening part 87 of the water intake roof part 86. One end 51 of the float guide part 50 is located at the upper part in the vertical direction of the opening 87 of the intake roof part 86 and extends downward in the vertical direction. The other end of the float guide portion 50 is located on the bottom 90 of the water channel 11 with a predetermined distance from the bottom 90. Further, the contact portion 42 of the lock portion 40 is disposed at one end portion 51 of the float guide portion 50.

  The float portion 52 is a cylindrical (semi-cylindrical) hollow member that stores air therein. The float unit 52 has buoyancy with respect to the flowing water 100. The float unit 52 is provided inside the float guide unit 50. The float unit 52 moves in the vertical direction inside the float guide unit 50 according to the fluctuation of the water level in the water intake 12. That is, if the water level in the water intake 12 rises, the float part 52 moves in the vertical direction accordingly, and if the water level in the water intake 12 descends, the float unit 52 moves in the vertical direction accordingly. In addition, the float part 52 will not be restricted to a cylindrical hollow member, if it has buoyancy with respect to the flowing water 100, For example, a porous member may be sufficient.

  The drive rod 54 is a rod-shaped member as shown in FIG. One end portion 55 of the drive rod 54 is attached to the float portion 52. The drive rod 54 extends vertically upward from one end 55 toward the other end 56 along the float guide portion 50. The drive rod 54 moves in the vertical direction along with the movement of the float unit 52 according to the fluctuation of the water level in the water intake 12. When the drive rod 54 is raised to a predetermined position, the other end 56 reaches the position of one end 51 of the float guide 50 and contacts the contact 42 of the lock 40. The drive rod 54 comes into contact with the contact portion 42 of the lock portion 40 and jumps the contact portion 42 upward in the vertical direction to release the pinion portion 33 from being fixed by the lock portion 40.

  FIG. 6 is a schematic diagram illustrating the configuration of the flow rate adjusting unit. As shown in FIGS. 1 and 6, the flow rate adjusting unit 60 includes a plate portion 61, a floating body portion 66, and a connecting portion 68. The flow rate adjusting unit 60 is attached to the lower end portion of the intake gate 20 by a connecting unit 68. The flow rate adjusting unit 60 changes the shielding amount of the opening 24 of the water intake gate 20 by rotating around the connecting portion 68 according to the water level of the water intake 12.

  The plate part 61 is a plate-like member. The plate portion 61 has a connecting portion 68 attached to one end portion 62. The plate portion 61 is attached to the lower end portion of the surface of the water intake gate 20 on the side of the water intake port 12 via the connecting portion 68. The plate portion 61 is attached to the water intake gate 20 so as to extend along the horizontal direction of the water intake gate 20 and from the lower end portion of the water intake gate 20 to the other end portion 63 downward in the vertical direction. .

  The plate portion 61 is a part of the surface 64 on the downstream direction X2 side and a contact surface 65 which is a surface on the one end portion 62 side is in contact with the surface on the intake port 12 side of the intake gate 20. The plate portion 61 has a rubber-like elastic body on the contact surface 65. The plate portion 61 has a rubber-like elastic body on the contact surface 65, thereby protecting the plate portion 61 and the water intake gate 20 and improving the water tightness between the plate portion 61 and the water intake gate 20. In addition, if the board part 61 protects the board part 61 and the water intake gate 20, and improves the watertightness between the board part 61 and the water intake gate 20, it will be a rubber-like elastic body on the contact surface 65. It is not limited to providing.

  The floating body 66 is a hollow member that is made of steel, FRP (Fiber Reinforced Plastics), or the like and stores air therein. The floating body 66 has buoyancy with respect to the flowing water 100. The floating body portion 66 is provided on the surface 64 of the plate portion 61. As for the floating part 66, the surface 67 on the opposite side to the surface attached to the board part 61 has circular arc shape. More specifically, the surface 67 has an arc shape from one end 62 of the plate portion 61 toward the other end 63. The surface 67 is provided with a plurality of groove portions 69 from one end 62 of the plate portion 61 toward the other end 63. In the present embodiment, five groove portions 69 are provided along the horizontal direction, but if provided on the surface 67 from one end portion 62 of the plate portion 61 toward the other end portion 63, It is not limited to this. Further, the floating body 66 is not limited to the above-described material as long as it has buoyancy with respect to the flowing water 100, and may not be a hollow member. The floating body 66 may be a porous member, for example.

  The connecting portion 68 is provided along the horizontal direction of the intake gate 20 and connects the plate portion 61 and the lower end portion of the surface on the intake port 12 side of the intake gate 20 as described above. In the present embodiment, the connecting portion 68 is a hinge. The connecting portion 68 connects the plate portion 61 and the lower end portion of the surface of the intake gate 20 on the intake port 12 side so that the plate portion 61 can rotate in the upstream direction X1 of the flowing water 100 with the connecting portion 68 as a central axis. doing. More specifically, the connecting portion 68 is configured so that the other end 63 of the plate portion 61 rotates within a range of 0 degrees or more and 90 degrees or less from the vertically lower side toward the upstream direction X1 of the running water 100. And the lower end of the surface of the intake gate 20 on the intake port 12 side are preferably connected. In addition, if the connection part 68 connects the board part 61 and the lower end part of the surface at the side of the water intake 12 of the intake gate 20 so that the board part 61 can rotate toward the upstream direction X1 of the flowing water 100, it will be. Not limited to hinges.

  As described above, the flow rate adjusting unit 60 includes the floating body 66 having buoyancy with respect to the flowing water 100, and the connecting portion 68 that allows the plate portion 61 and the floating body 66 to rotate in the upstream direction X1 of the flowing water 100. A rotational moment in the upstream direction X1 of the flowing water 100 due to buoyancy acts on the floating body 66. In addition, a rotational moment in the downstream direction X <b> 2 of the flowing water 100 is applied to the plate portion 61 by water pressure corresponding to the water level of the intake port 12. In the flow rate adjusting unit 60, the rotational moment in the upstream direction X1 due to the buoyancy acting on the floating body portion 66 is the rotational moment in the downstream direction X2 of the flowing water 100 due to the water pressure corresponding to the water level of the intake port 12 acting on the plate portion 61. When it falls below, the board part 61 and the floating body part 66 do not rotate toward the upstream direction X1 of the flowing water 100. In the flow rate adjusting unit 60, the rotational moment in the upstream direction X1 due to the buoyancy acting on the floating body portion 66 is the rotational moment in the downstream direction X2 of the flowing water 100 due to the water pressure corresponding to the water level of the intake port 12 acting on the plate portion 61. When it exceeds, the board part 61 and the floating body part 66 rotate toward the upstream direction X1 of the flowing water 100. The flow rate adjusting unit 60 includes a plate unit 61 and a floating body unit according to the relationship between the rotational moment in the upstream direction X1 due to buoyancy and the rotational moment in the downstream direction X2 of the flowing water 100 due to the water pressure according to the water level of the intake port 12. The amount of rotation of the running water 100 toward the upstream direction X1 is changed.

  As shown in FIGS. 1 and 2, the first opening adjustment rod 70 has one end attached to the upper end in the vertical direction of the intake gate 20, and through an opening 77 provided in the base 71. It is a rod-shaped member extending upward in the vertical direction. The first opening adjustment rod 70 moves in the vertical direction as the intake gate 20 moves up and down. In addition, a disc portion 74 is provided at a predetermined position on the outer periphery of the first opening adjustment rod 70 and vertically above the base portion 71. The disc portion 74 has a diameter larger than that of the opening 77. Accordingly, when the first opening degree adjusting rod 70 and the intake gate 20 are lowered to a position where the disc portion 74 is in contact with the base portion 71, the disc portion 74 and the base portion 71 are brought into contact with each other, so that the first opening adjusting rod 70 and the intake gate 20 are not further lowered. . That is, the disc part 74 and the first opening degree adjusting rod 70 serve as a stopper part that restricts the descent of the intake gate 20 to a predetermined position.

  In the present embodiment, the disc portion 74 and the first opening adjustment rod 70 limit the lowering position of the intake gate so that the lower end surface 22 of the intake gate 20 does not contact the bottom 90 of the water channel 11. Therefore, the gate support portion 30 supports the intake gate 20 by the disc portion 74 and the first opening adjustment rod 70 so that the intake gate 20 can be raised and lowered within a range where the lower end surface 22 of the water gate 20 does not contact the bottom portion 90 of the water channel 11. . However, in the water intake device 10, the gate support portion 30 takes the water intake gate 20 and the lower end surface 22 of the water gate 20 is the bottom portion 90 of the water channel 11 by adjusting the positions of the disk portion 74 and the first opening adjustment rod 70. You may make it support so that it may touch. That is, in this case, the water intake device 10 can fully close the water intake gate 20 by adjusting the positions of the disc portion 74 and the first opening degree adjusting rod 70.

  In the present embodiment, screws are provided on the outer periphery of the first opening adjustment rod 70 and the inner periphery of the disc portion 74. The disc portion 74 changes the position of the disc portion 74 in the axial direction of the first opening adjustment rod 70 by controlling the amount of tightening of the screw with the outer periphery of the first opening adjustment rod 70. Can be made. Therefore, the disc part 74 can change the maximum descent position of the intake gate 20. In the present embodiment, the first opening adjustment rod 70 and the disc portion 74 are provided with a scale indicating the height in the vertical direction. The operator can easily recognize the predetermined lowering position of the set intake gate 20 by reading the scale.

  As shown in FIGS. 1 and 2, the second opening adjustment rod 72 has one end attached to the upper end in the vertical direction of the intake gate 20, and through an opening 78 provided in the base 71. It is a rod-shaped member extending upward in the vertical direction. The second opening adjustment rod 72 is provided adjacent to the first opening adjustment rod 70 through the gate support portion 30. The second opening adjustment rod 72 moves in the vertical direction as the intake gate 20 moves up and down. A nut 76 is provided at a predetermined position on the outer periphery of the second opening adjustment rod 72 and vertically above the base portion 71. The nut 76 is larger in diameter than the opening 78 and smaller in diameter than the disk portion 74. Therefore, when the second opening degree adjusting rod 72 and the water intake gate 20 are lowered to a position where the nut 76 is in contact with the base portion 71, the nut 76 and the base portion 71 are brought into contact with each other, so that the second opening adjusting rod 72 and the water intake gate 20 are not further lowered. That is, the nut 76 and the second opening adjustment rod 72 serve as a stopper portion that restricts the descent of the intake gate 20 to a predetermined position.

  In the present embodiment, the nut 76 and the second opening adjustment rod 72 limit the lowering position of the intake gate so that the lower end surface 22 of the intake gate 20 does not contact the bottom 90 of the water channel 11. Therefore, the gate support portion 30 supports the intake gate 20 by the nut 76 and the second opening degree adjusting rod 72 so that the intake gate 20 can be raised and lowered within a range where the lower end surface 22 of the water gate 20 does not contact the bottom portion 90 of the water channel 11. However, the water intake device 10 adjusts the positions of the nut 76 and the second opening adjustment rod 72 so that the gate support portion 30 takes the water intake gate 20 and the lower end surface 22 of the water gate 20 contacts the bottom portion 90 of the water channel 11. You may make it support. That is, in this case, the water intake device 10 can fully close the water intake gate 20 by adjusting the nut 76 and the second opening degree adjusting rod 72.

  In the present embodiment, screws are provided on the outer periphery of the second opening adjustment rod 72 and the inner periphery of the nut 76. The nut 76 can change the position of the nut 76 in the axial direction of the second opening adjustment rod 72 by controlling the amount of tightening of the screw with the outer periphery of the second opening adjustment rod 72. . Therefore, the nut 76 can change the maximum lowering position of the intake gate 20. In the present embodiment, the first opening adjustment rod 70 and the nut 74 are provided with a scale indicating the height in the vertical direction. The operator can easily recognize the position of the intake gate 20 in the vertical direction by reading the scale. In the present embodiment, the maximum lowering position of the intake gate 20 is determined by the first opening degree adjusting rod 70 and the disc portion 74, and the nut 76 has the same height as the disc portion 74 in the vertical direction. The position is adjusted to be positioned. Since the disk portion 74 has a diameter larger than that of the nut 76, the position can be finely adjusted. In addition, in this embodiment, although there are two opening degree adjustment rods, it is not restricted to this, One or three or more may be sufficient.

  Next, operation | movement of the water intake apparatus 10 accompanying the change of the water level of the water intake 12 is demonstrated. 7, 8 and 9 are schematic views showing the operation of the water intake device at a predetermined water level at the water intake. FIG. 7 shows a case where the water level of the water intake 12 is the normal water level 102. FIG. 8 shows a case where the water level of the water intake 12 rises to the set water level 103. FIG. 9 shows a case where the water level of the water intake 12 is lowered from the set water level 103 and reaches the predetermined water level 105.

  The position of the intake gate 20 in the vertical direction is such that an operator operates the lever attached to the pinion portion 33 of the gate support portion 30 to move the intake gate 20 to a predetermined position, and the lock portion 40 moves the pinion portion 33 to the predetermined position. Determined by locking. In this case, the position of the intake gate 20 is determined such that the distance between the lower end of the intake gate 20 and the bottom 90 of the water channel 11 is a distance Y1, as shown in FIG. In this case, the distance between the lower end of the flow rate adjusting unit 60 and the bottom 90 of the water channel 11 is the distance Z1. In this case, the effective flow path 24 </ b> A, which is a flow path through which the flowing water 100 flows from the water intake 12 to the water outlet 13, is a portion excluding a portion where the flow rate adjusting unit 60 shields from the opening 24. That is, the effective flow path 24A in FIG. 7 is an opening portion in which the vertical distance between the lower end portion of the flow rate adjusting unit 60 and the bottom portion 90 of the water channel 11 is the distance Z1. In the present embodiment, the distances Y1 and Z1 can be arbitrarily set.

As shown in FIG. 8, when the water level of the intake port 12 rises due to water increase or the like and reaches a set water level 103 (for example, corresponding to a flow rate of 0.9 m ³ / s), the float 52 rises with the water level of the intake port 12. By doing so, the drive rod 54 jumps the contact portion 42 of the lock portion 40 upward in the vertical direction and releases the pinion portion 33 from being fixed by the lock portion 40. And the intake gate 20 falls to the position determined by the 1st opening degree adjustment rod 70 and the disc part 74 with dead weight. As shown in FIG. 8, the descent position of the intake gate in this embodiment is a position where the distance between the lower end of the intake gate 20 and the bottom 90 of the water channel 11 is a distance Y2.

  When the water level of the intake port 12 is the set water level 103, the rotational moment in the upstream direction X1 due to the buoyancy acting on the floating body portion 66 is downstream of the flowing water 100 due to the water pressure corresponding to the water level of the intake port 12 acting on the plate portion 61. The rotational moment in the direction X2 is below. Therefore, as shown in FIG. 8, the flow rate adjusting unit 60 does not rotate in the upstream direction X1 of the flowing water 100, and the plate unit 61 and the floating body unit 66 extend downward in the vertical direction. In this case, the distance between the lower end of the flow rate adjusting unit 60 and the bottom 90 of the water channel 11 is a distance Z2.

  As shown in FIG. 8, when the water level of the water intake 12 becomes the set water level 103, the effective flow path 24 </ b> B, which is a flow path through which the flowing water 100 flows from the water intake 12 to the water outlet 13, This is an opening portion in which the distance in the vertical direction between the lower end portion and the bottom portion 90 of the water channel 11 is the distance Z2. Further, the water level 104 of the running water 100 discharged from the water outlet 13 through the effective flow path 24B is the lower end of the flow rate adjusting unit 60, that is, the water level corresponding to the distance Z2. In the present embodiment, the distance Y2 and the distance Z2 are arbitrarily set as long as the water intake amount is set so as not to exceed the permitted water amount even when the water level of the intake port 12 is equal to or higher than the set water level 103. can do. Further, the set water level 103 that is the water level at which the lock unit 40 releases the pinion unit 33 can be arbitrarily set as long as the water intake amount does not exceed the permitted water amount.

  As shown in FIG. 9, when the water level of the water intake 12 drops from the set water level 103 to the predetermined water level 105, the position of the water intake gate 20 does not change from the position shown in FIG. In this case, the distance between the lower end portion of the intake gate 20 and the bottom portion 90 of the water channel 11 remains the distance Y2. Therefore, in this case, when the flow rate adjusting unit 60 extends downward in the vertical direction, the distance between the lower end of the flow rate adjusting unit 60 and the bottom 90 of the water channel 11 is the distance Z2. It remains.

  Here, the predetermined water level 105 has a vertical height greater than the distance Z2. Further, when the water level of the intake port 12 is the predetermined water level 105, the flowing moment 100 due to the water pressure corresponding to the water level of the intake port 12 acting on the plate portion 61 is caused by the rotational moment in the upstream direction X1 due to the buoyancy acting on the floating body portion 66. Exceeds the rotational moment in the downstream direction X2. Therefore, as shown in FIG. 9, the flow rate adjusting unit 60 rotates toward the upstream direction X <b> 1 of the flowing water 100. More specifically, when the water intake 12 is at the predetermined water level 105, the flow rate adjusting unit 60 is located upstream of the running water 100 so that the distance between the lower end of the flow rate adjusting unit 60 and the bottom 90 of the water channel 11 is a distance Z3. It rotates in the direction X1. In this case, the lower end portion of the flow rate adjusting unit 60 is a position where the surface 67 of the floating body 66 is in contact with the water surface of the running water 100 (the position of the predetermined water level 105). That is, the flow rate adjusting unit 60 rotates so that the lower end portion of the flow rate adjusting unit 60 is in contact with the running water 100. Therefore, the distance Z3 is a position corresponding to the predetermined water level 105.

  In this case, the effective flow path 24 </ b> C, which is the flow path through which the flowing water 100 flows from the water intake 12 to the water outlet 13, has a vertical distance between the lower end of the flow rate adjusting unit 60 and the bottom 90 of the water channel 11. It is an opening part which becomes Z3. As described above, when the water level of the intake port 12 becomes equal to or higher than the set water level 103 and the water level subsequently decreases to the predetermined water level 105, the flow rate adjusting unit 60 rotates toward the upstream direction X1 of the flowing water 100, and thus the effective flow path is large. Become.

  The rotation amount of the flow rate adjusting unit 60, that is, the distance between the lower end portion of the flow rate adjusting unit 60 and the bottom portion 90 of the water channel 11 changes according to the water level of the water intake 12. That is, according to the relationship between the rotational moment in the upstream direction X1 due to the buoyancy acting on the floating body 66 and the rotational moment in the downstream direction X2 of the flowing water 100 due to the water pressure corresponding to the water level of the water intake 12 acting on the plate portion 61. The amount of rotation of the flow rate adjusting unit 60 changes. For example, when the water level of the intake port 12 rises above the predetermined water level 105, the rotational moment due to buoyancy increases, so the flow rate adjusting unit 60 further rotates in the upstream direction X1 and the effective flow path increases. When the flow rate adjusting unit 60 starts rotating, that is, when the rotational moment due to buoyancy exceeds the rotational moment due to water pressure, the water level of the intake port 12 is, for example, that the water level of the intake port 12 is one end 62 of the plate portion 61. However, it is not limited to this and can be arbitrarily set.

  In addition, after the water level of the water intake 12 is lowered to the predetermined water level 105 and the water intake device 10 continues the water intake for a predetermined period while enlarging the effective flow path by the rotation of the flow rate adjusting unit 60, the operator performs the gate support unit 30. By operating the lever attached to the pinion part 33, the position of the intake gate 20 is returned to the position shown in FIG.

  As described above, the water intake device 10 according to the present embodiment has the lock portion 40 that releases the fixation of the water intake gate 20 when the water level reaches a predetermined level, and also shields the opening 24 according to the water level of the water intake port 12. It has a flow rate adjusting unit 60 that changes the amount. Therefore, the water intake device 10 can suppress a shortage of water intake by adjusting the opening area of the effective flow path even when the water level subsequently decreases while suppressing water intake exceeding the permitted water amount. . Moreover, since this flow volume adjustment part 60 is attached to the intake gate 20, it can be easily attached also to the existing intake gate.

  Furthermore, the flow rate adjustment unit 60 according to the present embodiment includes a plate unit 61 and a floating body unit 66. Therefore, when the water level is high and the flow rate adjustment unit 60 is closed, the water intake device 10 according to the present embodiment can reliably shield the opening 24 by the plate unit 61. Further, the flow rate adjusting unit 60 is directed toward the upstream direction X1 of the flowing water 100 when the rotational moment due to the buoyancy acting on the floating body portion 66 exceeds the rotational moment due to the water pressure caused by the water level of the intake port 12 acting on the plate portion 61. Rotate. Then, the rotation amount of the flow rate adjusting unit 60 changes according to the balance between the buoyancy acting on the floating body 66 and the water pressure caused by the water level of the water intake 12 working on the plate 61. Therefore, the water intake device 10 according to the present embodiment can appropriately adjust the opening area of the effective flow path according to the water level of the water intake 12.

  Furthermore, in the flow rate adjusting unit 60 according to the present embodiment, the surface 67 of the floating body 66 has an arc shape. Therefore, the flow rate adjusting unit 60 can appropriately follow the water surface of the flowing water 100 at the intake port 12 (the water level of the intake port 12) while suppressing the resistance of the flowing water 100. Further, the flow rate adjusting unit 60 according to the present embodiment has a groove 69 on the surface 67 of the floating body 66. The flow rate adjusting unit 60 can appropriately follow the water surface of the flowing water 100 at the intake port 12 (water level of the intake port 12) by suppressing the resistance of the flowing water 100 by the groove 69. Therefore, the flow rate adjusting unit 60 can appropriately rotate according to the water level of the water intake port 12 to more suitably adjust the opening area of the effective flow path.

  In addition, the flow rate adjusting unit 60 according to the present embodiment rotates within a range of 0 degrees or more and 90 degrees or less from the lower side in the vertical direction toward the upstream direction X1 of the running water 100. Therefore, when the water level of the water intake 12 rises again, the water intake device 10 can appropriately close the flow rate adjusting unit 60 (position downward in the vertical direction) and more appropriately shield the opening 24. it can.

  Moreover, the water intake apparatus 10 which concerns on this embodiment supports the water intake gate 20 so that raising / lowering is possible by the gate support part 30 which has a rack and pinion structure. Therefore, the water intake device 10 can suitably raise and lower the water intake gate 20. However, the gate support part 30 is not limited to a rack and pinion structure as long as it supports the intake gate 20 so that it can be moved up and down. For example, the intake gate 20 is supported by a wire, and the intake gate 20 is wound up by winding the wire. It may be moved up and down.

  As mentioned above, although embodiment of this invention was described, this invention is not limited by the content of these embodiment. In addition, the above-described constituent elements include those that can be easily assumed by those skilled in the art, those that are substantially the same, and those in a so-called equivalent range. Furthermore, the above-described components can be appropriately combined. Furthermore, various omissions, substitutions, or changes of the components can be made without departing from the spirit of the above-described embodiment.

DESCRIPTION OF SYMBOLS 10 Intake device 11 Water channel 12 Intake port 13 Outlet port 20 Intake gate 30 Gate support part 40 Lock part 50 Float guide part 52 Float part 54 Drive rod 60 Flow control part 61 Plate part 66 Floating part 68 Connection part 70 1st opening degree Adjustment rod 72 Second opening adjustment rod 90 Bottom portion 100 Flowing water X1 Upstream direction X2 Downstream direction

Claims (6)

A water intake device arranged in a water channel for controlling the flow rate of the water channel,
A water intake gate that is provided in the water channel and that forms an opening for water intake between a lower end surface and the bottom of the water channel;
A gate support that supports the water intake gate so that the lower end of the water intake gate is not in contact with the water channel;
A lock part attached to the gate support part, and suppressing the raising and lowering of the intake gate by fixing the gate support part;
A float that is provided upstream of the water intake gate of the water channel, and that moves in a vertical direction in accordance with a change in the water level of the water channel upstream of the water intake gate;
A rod that is attached to the float and moves in the vertical direction along with the movement of the float, and releases the fixation of the gate support portion of the lock portion when the float rises to a predetermined position;
Wherein provided at the lower end of the water intake gates, have a, a flow rate adjusting unit for changing the shielding amount of said opening in response to the water level of the water channel upstream of the intake gates,
The flow rate adjustment unit is
A plate portion provided along a lower end portion of the intake gate, and extending vertically downward from a lower end portion of the intake gate;
A floating body portion provided on the downstream side surface of the flowing water of the plate portion, and having buoyancy;
The lower end portion of the intake gate and the upper end portion of the plate portion can be rotated toward the upstream direction of the flowing water, with the plate portion being a rotation axis between the lower end portion of the intake gate and the upper end portion of the plate portion. And a connecting portion connected to
According to the relationship between the rotational moment in the upstream direction of the flowing water due to the buoyancy acting on the floating body portion and the rotational moment in the downstream direction of the flowing water due to the water pressure according to the water level upstream of the intake gate. A water intake device that changes the amount of rotation of the plate . The floating body has intake device according to claim 1 surface opposite to the plate portion is a circular arc shape. The water intake device according to claim 2 , wherein the floating body portion is provided with a groove along a vertical direction on a surface opposite to the plate portion. The plate portion, a vertical direction from the lower side to the upstream direction of the flowing water, water intake apparatus according to any one of claims 1 to 3 which rotates at a range of 90 degrees 0 degrees. The water intake device according to any one of claims 1 to 4 , wherein the water intake gate includes a stopper portion that restricts the descent of the water intake gate to a predetermined lower position. The said stopper part is a water intake apparatus of Claim 5 which has a display part which displays the said predetermined downward position of the said water intake gate.

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