JP2009155946A - Water level regulating gate for water passage - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a water level regulating gate for a water passage which can surely discharge excess inflow water from an overflow part without gate operation by a worker and can be installed in an existing water passage. <P>SOLUTION: The water level regulating gate for the water passage is used in the water passage where a pair of sidewall portions 121, 122 facing each other to form the water passage is provided and one of the sidewall portions 121 is made to be lower than the other sidewall portion 122 to form an overflow portion 120 discharging the excess inflow water (inflow water exceeding a predetermined amount) from the sidewall portion 121. The water level regulating gate comprises a panel body 10 having a width same as a distance between a pair of the sidewall portions 121, 122 and disposed between a pair of the sidewall portions 121, 122, a support member 20 for rockably supporting the panel body 10 between a state where the lower end of the panel body 10 is floating on the water surface and a state where the lower end is sinking in water, and a floating means F raising the lower end of the panel body 10 sinking into flowing water. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a water level adjustment gate for a water channel for maintaining a constant water level flowing down in a water channel such as a water channel branched from a river, and more specifically, for draining the water in the water channel outside the water channel. The present invention relates to a water level adjustment gate for a water channel used in a water channel provided with an overflow section.

  As shown in FIG. 5, the small-scale hydroelectric power station generates power using the flowing water flowing down the water channel (hereinafter referred to as “water conduit”) 100 branched from the river R. The water conduit 100 is provided with a water intake 110, an overflow part 120, and a flow path 130 from the upstream side.

  The water intake 110 is provided on the upstream side of the weir D constructed in the river R, and a water intake gate 111 for adjusting the amount of flowing water flowing into the water conduit 100 is provided.

  Moreover, the overflow part 120 is constructed along the river R by a bottom wall part (not shown in FIG. 5) and a pair of opposed side wall parts 121 and 122 in a substantially U-shaped cross section. However, the side wall 121 on the river R side is made lower than the other side wall 122, and when the flowing water flowing into the water conduit 100 exceeds a predetermined amount, the flowing water (overtake water) is returned to the river R by overflow. Has been.

  The flow path 130 is continuous with the overflow portion 120 and is provided with a top plate portion 131 so that dust such as fallen leaves and earth and sand does not flow into the water conduit 100. Note that the downstream side of the flow path 130 may be buried in the ground up to the hydroelectric power plant.

  The water conduit 100 constructed for such a small hydropower plant is not allowed in terms of cost to be provided with a water intake gate that is operated by an automatic control device such as that used in a large inflow hydropower plant. The operator manually operates the intake gate 111 to adjust the amount of water flowing into the conduit 100, and returns the excess intake that cannot be adjusted by the intake gate 111 from the overflow section 120 to the river R by overflow. I am doing so.

  An automatic water level adjustment gate that can automatically adjust the water level of a water channel is disclosed in Patent Document 1. The automatic water level adjustment gate includes a door body that opens and closes the water channel with a width of the water channel, a pair of gate arms that fix the door body to a distal end portion, a center of the gate arm, and a water channel A float that moves the rotary shaft up and down by buoyancy, and a float chamber that houses the float and raises and lowers the float according to the water level upstream of the water channel. This automatic water level adjustment gate opens and closes the water channel as the door moves up and down in conjunction with the raising and lowering of the float.

  Further, Patent Document 2 discloses an automatic gate that holds an upstream water level in a rectangular open channel at a fixed planned water level. In this automatic gate, a pair of bearings are provided on the channel wall at the same height as the planned upstream water level of the open channel, and a rotary shaft is horizontally mounted on the pair of bearings, and an upstream arm and a downstream side are mounted on the rotary shaft. The second skin has an arm projecting toward the upstream side and the downstream side, a first skin plate is provided at the tip of the upstream arm, and a float portion is provided on the upstream side surface of the first skin plate. A plate is provided, a front and rear balance body is provided at the tip of the downstream arm, and an upper cover for inserting ballast weight is attached to the front and rear balance body. In this automatic gate, a balance weight is placed in the upper cover so that the upstream water level maintains a desired planned water level by balancing the buoyancy of the float portion with the front and rear balance bodies.

JP 2005-23747 A Registered Utility Model No. 3036233

  In the water conduit 100 for supplying water to a small-scale hydroelectric power plant, even if an operator operates the intake gate 111 of the intake port 110 according to the amount of water in the river R and the water is increased, the excess intake water will overflow. Is returned to the river R, and an appropriate amount of running water flows down to the flow path 130. However, since the operation by the worker cannot respond quickly, particularly at night, all of the excess water is not returned from the overflow part 120 to the river R and may flow down to the flow path 130. Furthermore, frequent operations are a heavy burden on the operator.

  In addition, the devices disclosed in Patent Documents 1 and 2 are not only complicated in mechanism, but cannot be installed in existing water channels.

  Therefore, the present invention provides a water level adjustment gate for a water channel that allows an excessive intake water to be reliably discharged from an overflow portion and installed in an existing water channel even if an operator does not operate the gate. The issue is to provide.

  The water level adjusting gate for a water channel according to the present invention is provided with a pair of opposed side wall portions that form a water channel, and one side wall portion is made lower than the other side wall portion, so that flowing water that has flowed in more than a predetermined amount. Is a water level adjustment gate for a water channel disposed in an overflow portion that discharges from one side wall portion, and a panel body disposed between the pair of side wall portions, and a lower end portion of the panel body on a surface of running water A support member that holds the panel body so as to be able to swing between a floating state and a state where the panel body is submerged in water, and a floating means that floats the lower end portion of the panel body submerged in running water are provided. It is said.

  According to the water level adjustment gate for the water channel, the panel body held by the support and disposed between the pair of side wall portions is in a state where the amount of running water in the water channel is normal and the lower end portion is floated on the water surface. When a predetermined amount of flowing water flows down and the flowing water in the water channel increases, the lower end portion is submerged in the water, and excess water due to the increased water is surely discharged from the overflow portion, and the predetermined amount of flowing water is It is supposed to flow down. And when the flowing water in a water channel returns normally, the lower end part of the panel body which was sunk in water will be in the state which floated on the water surface by the floating means.

  Further, in the water level adjustment gate for a water channel according to the present invention, the floating means is a traction tool comprising a bar laid on the water channel and a tension member laid across the bar and the panel body. It is preferable to be configured.

  According to the water level adjustment gate for the water channel, the floating member means is constituted by a traction device including a bar and a tension member, so that when the flowing water in the water channel increases, the tension member is pulled and the panel body is pulled. When the lower end sinks into water and the flowing water in the water channel returns to normal, the tension member forcibly pulls up the lower end of the panel body and floats on the water surface.

  In the water level adjusting gate for a water channel according to the present invention, the floating means may be constituted by a float that provides a sealed space with a plate at a lower end portion of the panel body.

  According to the water level adjusting gate for the water channel, the floating means is constituted by a floating member provided with a sealed space by a plate at the lower end of the panel body, so that when the flowing water in the water channel increases, the floating member resists buoyancy. When the bottom end of the panel body sinks into the water and the running water in the water channel returns normally, the bottom end of the panel body floats on the water surface due to the buoyancy of the float.

  In the water level adjustment gate for a water channel according to the present invention, it is preferable that the floating means is constituted by a float in which a weight for adjusting buoyancy is enclosed in an arbitrary amount in the sealed space.

  According to this water level adjustment gate for a water channel, the float has an arbitrary amount of weight sealed in a sealed space, and the buoyancy is adjusted so that the lower end of the panel body has an appropriate depth according to the amount of water. It can be submerged in water.

  Moreover, in the water level adjusting gate for a waterway according to the present invention, it is preferable that the floating means includes the traction tool and the float.

  According to the water level adjusting gate for this water channel, the floating means means includes the traction tool and the float, so that the traction tool and the float cooperate to lift the lower end of the panel body submerged in water. it can.

  In the water level adjustment gate for a water channel according to the present invention, it is preferable that a curved plate having a concave surface toward the upstream side is provided at a lower end portion of the panel body.

  According to this water level adjustment gate for a water channel, a curved plate is provided at the lower end portion of the panel body, and the curved plate is formed with a concave surface toward the upstream, so that excessive water intake in the water channel can be Without sliding down the upper surface of the body, the lower end can be pushed down to sink into the water.

  In the water level adjusting gate for a water channel according to the present invention, it is preferable that a stopper is provided to prevent the lower end portion of the panel body from sinking more than a predetermined amount in water.

  According to the water level adjusting gate for the water channel, since the stopper is provided, it is possible to prevent the lower end portion of the panel body from sinking until it becomes impossible to float on the water surface again.

  Further, in the water level adjusting gate for a water channel according to the present invention, a through hole is formed in the panel body, the stopper fixes the rod penetrating the through hole, the rod at the upper end, and the water channel And a bar attached to the lower end of the rod so as to contact the lower surface of the lower end of the panel body submerged in water.

  According to this water level adjustment gate for a water channel, a through hole is formed in the panel body, a rod that penetrates the through hole is fixed to a bar that spans the water channel on the upper end side, and a lower surface of the panel body is attached to the lower end side. The panel body sinks into the water by the stopper to which the abutting stop body is attached, and the panel body can be prevented from sinking until it can no longer float by being stopped by the stop body. .

  According to the water level adjustment gate for a water channel according to the present invention, the panel body is disposed between the pair of side wall portions of the overflow portion, and the amount of water flowing in the water channel is normal, and the lower end portion of the panel body floats on the water surface. When the water flow in the water channel increases, the lower end of the panel body is submerged in the water, and the overtake water is surely discharged from the overflow portion, so that the operator does not have to operate the gate. An appropriate amount of running water can be allowed to flow down.

  An embodiment of a water level adjusting gate for a waterway according to the present invention will be described with reference to FIGS. However, the same parts as in the prior art will be described with the same reference numerals.

  The water level adjustment gate in the present embodiment is used in a water conduit 100 for generating electricity in a small-scale hydroelectric power station as shown in FIG. 5, an irrigation water channel and other water channels (hereinafter, referred to as “water conduit”). The This water conduit 100 is formed in a tunnel shape by a water intake 110 for taking in flowing water from the river R, an overflow part 120 for discharging excess water by overflow, and a top plate part 131, but the flow path 130 is formed from the upstream side to the downstream side. Is provided.

  As shown in FIG. 1, the water level adjusting gate for the water channel is disposed between the pair of side wall portions 121 and 122 with a width of the interval between the pair of side wall portions 121 and 122 of the overflow portion 120. A panel body 10, a support member 20 that holds the panel body 10 in a swingable manner, and a float device F provided at the lower end of the panel body 10 are provided.

  The panel body 10 swings between a state in which the lower end portion is floated on the surface of running water in the water conduit 100 and a state in which the panel body 10 is submerged in water. Therefore, the support member 20 is configured by a hinge that connects the upper end portion of the panel body 10 and the exposed edge of the top plate portion 131 of the flow path 130. Alternatively, the support member 20 is not shown, but a pair of bearings are fixed to the side wall portions 121 and 122 at the downstream end of the overflow portion 120, a projection-shaped support shaft is provided at the upper end of the panel body 10, and the support shaft is used as the bearing. You may make it fit.

  Moreover, the floating means F is comprised by what combined the traction tool 30 and the float 40, or any one. The traction tool 30 includes a bar 31 provided on a pair of side walls 121 and 122 of the overflow part 120 and a tension member 32 provided between the bar 31 and the panel body 10. The bar 31 is formed with a female screw so that the elastic force of the tension member 32 can be adjusted, and a rod 33 having a male screw is screwed into the female screw. The tension member 32 is connected to the lower end of the. As the tension member 32, a tension spring or rubber excellent in weather resistance is used.

  The float 40 is constituted by plates 42 and 43 that provide a sealed space 41 at the lower end of the panel body 10. The plates 42 and 43 are a combination of a curved plate 42 erected in a substantially vertical posture from the lower end edge of the panel body 10 and a top plate 43 erected on the panel body 10 in a horizontal posture from the upper edge of the curved plate 42. It is said that The curved plate 42 is formed with a concave surface toward the upstream side, and the flowing water flowing down can push down the lower end portion of the panel body 10 without sliding on the upper surface of the panel body 10. .

  The top plate 43 is provided with a hole 45 for placing a weight 44 such as a ballast material in the sealed space 41, and the hole 45 is closed by a cap 46. The hole 45 may be formed by a female screw, and the cap 46 may be constituted by a thumbscrew. The weight 44 may be fixed to the top plate 43 or the lower surface of the lower end portion of the panel body 10.

  The water level adjusting gate for the water channel is provided with a stopper 50 for preventing the panel body 10 from sinking more than a predetermined amount in water. Therefore, the through hole 11 is formed in the panel body 10, and the stopper 50 fixes the rod 51 passing through the through hole 11, the rod 51 on the upper end side, and a pair of side wall portions of the overflow portion 120. A bar 52 erected on 121 and 122 and a stopper 53 attached to the lower end side of the rod 51 so as to come into contact with the lower surface of the lower end side of the panel body 10 submerged in water. The rod 51 is formed with a male screw, and the bar 52 is fixed with a female screw that is screwed with the male screw, and the stopper 53 is formed of a nut to adjust the limit of sinking the panel body 10. Have been able to.

  The water level adjusting gate for the water channel is configured as described above, and the usage state will be described next. When the amount of flowing water in the overflow portion 120 of the water conduit 100 is normal, the panel body 10 is pulled by the traction tool 30 as shown in FIG. 3, and the lower end portion is on the water surface by the buoyancy of the float 40. It will be in a floating state. Therefore, the flowing water that has flowed down to the overflow portion 120 flows down toward the flow path 130 by a predetermined amount.

  And when the flowing water in the overflow part 120 of the water conduit 100 increases, the flowing water presses the curved plate 42 and pushes down the lower end of the panel body 10. Therefore, as shown in FIG. 4, the panel body 10 is in a state where the lower end portion is submerged in water. Then, the increased running water is in a state of riding on the upper surface of the panel body 10 and is forcibly discharged from the overflow portion 120 by overflow. Therefore, a predetermined amount of running water flows down the flow path 130.

  In addition, the panel body 10 sinks in water according to the amount of the increased flowing water. Further, the panel body 10 sunk in the water does not sink too much by the stopper 50.

  And when the flowing water in the overflow part 120 of the water conduit 100 returns normally, the lower end part of the panel body 10 is pulled by the traction tool 30, and also rises by the buoyancy of the float 40, and the lower end part floats on the water surface. It becomes.

  In addition, this invention can be variously changed within the range of the technical matter described in the claim, without being limited to the said embodiment. For example, the float 40 may not be configured by the curved plate 42, the top plate 43, and the lower end portion of the panel body 10, and a waterproof bag body may be attached to the lower end portion of the panel body 10.

  Moreover, although the illustrated traction tool 30 and stopper 50 are configured as a pair, they may be configured by one or three or more. Further, the stopper 50 may be configured such that protrusions that stop the lower surface of the submerged panel body 10 protrude from the side wall portions 121 and 122 of the overflow portion 120. Or the stopper 50 does not need to be provided according to a use condition.

It is a partial section perspective view showing one embodiment of the water level adjustment gate for waterways concerning the present invention. It is a side view showing one embodiment of the water level adjustment gate for waterways concerning the present invention. It is one Embodiment of the water level adjustment gate for waterways which concerns on this invention, Comprising: It is a cross-sectional side view which shows the state of the normal amount of water. It is one Embodiment of the water level adjustment gate for waterways which concerns on this invention, Comprising: It is a cross-sectional side view which shows the state which increased water. It is a schematic perspective view of the water conduit and river which are examples of a water channel.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Panel body 11 ... Through-hole 20 ... Supporting member 30 ... Traction tool 40 ... Floating element 41 ... Sealed space 42 ... Plate (curved surface plate)
43 …… Plate (top plate)
44... Weight 50... Stopper 51... Rod 52... Bar 53.

Claims (8)

A pair of opposing side wall portions that form a water channel are provided, and one side wall portion is made lower than the other side wall portion, so that the flowing water that has flowed in more than a predetermined amount is disposed in an overflow portion that discharges from one side wall portion. A water level adjustment gate for a waterway,
A panel body disposed between the pair of side wall portions, and a support member that holds the panel body so as to be swingable between a state in which a lower end portion of the panel body floats on a surface of running water and a state in which the panel body sinks in water. A water level adjusting gate for a waterway, characterized by comprising floating means for floating the lower end of the panel body submerged in running water.   The said floating device means is comprised by the traction tool provided with the bar erected by the water channel and the tension | tensile_strength member spanned over this bar and the said panel body, The said traction tool is comprised. Water level adjustment gate for waterways.   The water level adjusting gate for a water channel according to claim 1, wherein the floating means is constituted by a float that provides a sealed space with a plate at a lower end portion of the panel body.   4. The water level adjustment gate for a water channel according to claim 3, wherein the floating means is constituted by a float in which a weight for adjusting buoyancy is sealed in an arbitrary amount in the sealed space.   The water level adjusting gate for a water channel, wherein the floating means includes the traction tool according to claim 2 and the float according to claim 3 or 4.   The water level adjusting gate for a water channel according to any one of claims 1 to 5, wherein a curved plate having a concave surface toward the upstream side is provided at a lower end portion of the panel body.   The water level adjusting gate for a water channel according to any one of claims 1 to 6, further comprising a stopper that prevents the lower end side of the panel body from sinking more than a predetermined amount in water.   A through hole is formed in the panel body, and the stopper includes a rod that penetrates the through hole, a bar that fixes the rod at the upper end, and a bridge that spans a water channel. The water level adjusting gate for a water channel according to claim 7, further comprising a stopper attached to a lower end portion of the rod so as to abut on a lower surface on the lower end side.

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