JP3044672U - Opening and closing weir - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To ensure that the level of water storage in a waterway can be set reliably while keeping equipment costs and operation costs low. SOLUTION: A transverse shaft 2 traversing a water channel 7, a pivot weir 3 supported by the transverse shaft 2 and capable of changing its posture between an inclined posture and a prone posture, and this pivot weir 3, the lifting weirs 4 a and 4 b provided so as to be changeable between an upper position and a lower position by moving up and down, a water retention tank 30 attached to the rotating weir 3, and a rotating weir 3. A weight 5 is provided to be inclined by weight. The rotating weir 3 has a water damming surface, and the lifting / lowering weirs 4a and 4b are located at the lower position. The water retention tank 30 has a water inlet 37 formed at the top, and a small hole 38 for water discharge at the bottom.
The weight 5 is set so as to balance the total weight of the rotary weir 3 and the lifting / lowering weirs 4a and 4b in a state where a predetermined amount of water is stored in the water retention tank 30.

Description

[Detailed description of the invention]

[0001]

[Industrial applications]

 The present invention relates to a switching weir provided in a river, a canal, an irrigation canal, and the like.

[0002]

[Prior art]

 Conventionally, open / close weirs provided in rivers, canals, irrigation canals, and the like are known. The open / close weir is provided so as to be able to ascend and descend across waterways such as irrigation canals.It is normally closed to store running water upstream, and when the blocked water exceeds a predetermined level. The opening and closing weirs are opened to discharge water. For example, in an irrigation canal for agricultural use, such an open / close weir is normally closed to stably withdraw irrigation water from the irrigation canal, and when the water level in the irrigation canal abnormally rises due to heavy rain or the like. Open to prevent flooding.

[0003]

[Problems to be solved by the invention]

 By the way, in the conventional opening and closing weir, an opening and closing mechanism is usually provided, and the opening and closing of the weir is performed by operating this opening and closing mechanism. When such an operation is performed manually, There is a problem that the operator has to go to the open / close weir one by one and operate it, which is very troublesome.

In order to solve such a problem, it is conceivable to automate the operation of opening and closing the weir according to the water storage level. However, a detection mechanism for detecting the water storage level and the automatic opening and closing of the weir are considered. Therefore, there is a new problem that the construction cost of the open / close weir must be increased.

[0005] The present invention has been made to solve the above-mentioned problems, and it is necessary to reduce the equipment cost and the operating cost, and to reliably perform the opening and closing operation according to the water level of the stored water. The purpose of the present invention is to provide a switching weir that can be obtained.

[0006]

[Means for Solving the Problems]

 The opening / closing weir according to claim 1 of the present invention is disposed so as to cross the waterway between the two banks, and is configured to open and close so as to block the water flow and discharge the blocked water. A weir, a transverse axis extending in a horizontal direction provided so as to cross the water channel, and a pivot supported rotatably around the transverse axis and inclined at a predetermined angle upward with respect to a horizontal plane. The rotation weir is provided so that the posture can be changed between the inclined posture and the lying down posture extending in the horizontal direction, and by ascending and descending following the rotation of the rotation weir around the transverse axis. At least one elevating weir provided so that its position can be changed between an upper position for blocking the water flow and a lower position for releasing the blocking of the water flow, and a water retention tank attached to the tip end of the rotary weir. And a weight that makes the rotary weir inclined by weight. The rotating weir is provided with a water damming surface extending in the circumferential direction about the transverse axis, and the lifting weir is a water damming surface of the rotating weir in a lower position. The water retention tank has a water inlet formed at the top, and a water drain hole having a smaller opening area than the water inlet is formed at the bottom of the water retention tank. The weight of the weight is set so as to balance the total weight of the rotary weir and the lifting weir in a state where a predetermined amount of water is stored in the water retention tank.

According to this open / close weir, when water is not stored in the water retention tank, the weight of the weight causes the water retention tank to rotate in a predetermined direction around the transverse axis, thereby causing the water retention tank to be inclined. Since the open / close weir is closed by the set rotary weir and the lift weir located at the upper position following the rotary weir, the flowing water in the upstream waterway is blocked. Then, when the level of the water blocked by the closed water storage tank rises and reaches the water inlet, water enters the water storage tank from there, and thereby the weight of the water storage tank side (in consideration of the moment). Weight, the same shall apply hereinafter). When the weight of the water retention tank exceeds the weight of the weight due to the water that has flowed in, the water retention tank rotates around the transverse axis in the opposite direction with this weight and descends to open the open / close weir. The water in the blocked canal passes through the top of the rotating weir and flows downstream.

[0008] Thereafter, the water stored in the water retention tank is discharged to the outside through the bottom hole, so that the weight of the water retention tank side becomes lighter than the weight of the weight, which causes the weight to be reduced. As a result, the rotary weir rises and returns to the original state in which the open / close weir is closed again.

As described above, according to the state of water storage in the water channel, that is, when the rotation weir and the lifting weir are closed, when the amount of water exceeding the limit is stored on the upstream side, the water is automatically rotated without using power. When the weir is opened and water is released, and conversely when the amount of water stored decreases, the rotating weir and the lifting weir are automatically closed. Equipment costs and operating costs are reduced as compared to

According to a second aspect of the present invention, there is provided the open / close weir according to the first aspect, wherein the weight is rotatable about a support shaft so as to be changeable between an upper position and a lower position. The rotating weir and the weight are pivotally supported, and the rotating weir is set to an inclined posture with the weight being located at the lower position, and the rotating weir is set to be inclined when the weight is located at the upper position. It is characterized by being connected so as to be set in a prone position.

According to this open / close weir, when the water tank is not filled with water, the weight is heavier than the water flow tank, and the weight balance between the weight and the water flow tank is lost, and the weight is lost. Is located at the lower position, the water tank connected to the weight is set in the inclined position, and the rotary weir is closed. Then, the level of the water blocked by the rotating weir exceeds the predetermined height level, and the water flows from the water inlet into the water retention tank, whereby the weight of the water retention tank containing water is reduced by the weight. When the weight exceeds the weight, the water flow tank is lowered and the posture is changed to the prone position, the rotary weir is opened, and the upstream water stored in the weir is discharged. Then, the water retention tank becomes lighter than the weight due to the drainage of the water inside, and the water retention tank changes its posture to the inclined posture due to the change in the position of the weight to the lower position. As a result, the rotary weir is closed.

According to a third aspect of the present invention, there is provided an opening / closing weir according to the second aspect, wherein a weir-side sprocket is provided concentrically with the transverse shaft, and a weight-side sprocket is provided concentrically with the support shaft. A chain is stretched between the weight side sprocket and the weir side.

According to this open / close weir, the rotation of the support shaft about the axis due to the lowering of the weight is transmitted to the transverse axis via the weight-side sprocket, the chain, and the weir-side sprocket, and thereby the transverse axis. The rotation weir is closed by the rotation about the axis. In addition, the rotation of the transverse shaft around the axis due to the lowering of the water retention tank is transmitted to the support shaft via the weir-side sprocket, the chain, and the weight-side sprocket, and the rotation of the support shaft around the axis is thereby performed. Then the weight rises.

According to a fourth aspect of the present invention, there is provided an opening / closing weir according to the third aspect, further comprising a guide rail for guiding the elevation of the lifting / lowering weir, the guide rail being centered on the transverse axis. The rotary weir is formed so as to follow an arc, and the rotating weir has a suspending member for lifting the elevating weir at a lower end edge of the water damming surface.

According to this opening / closing weir, when the rotating weir rotates around the transverse axis and shifts to the inclined posture, the lifting weir is in a state of being lifted by the suspending member. When it is set to the inclined posture, the rising / lowering weir is connected to the lower end of the rotary weir, whereby the opening / closing weir is closed. In addition, since the lifting weir is guided by the arc-shaped guide rails and moves up and down, it does not deviate from the rotation locus of the rotating weir, and the lifting and lowering operation stably follows the rotation of the rotating weir. .

According to a fifth aspect of the present invention, there is provided the open / close weir according to any one of the first to fourth aspects, further comprising a hydraulic damper configured to buffer a rotation speed of the water retaining tank about a transverse axis. It is characterized by having.

According to this opening / closing weir, the rotational speed of the water retention tank around the transverse axis is reduced by the buffering action of the hydraulic damper, so that the water stored by the sudden opening of the closed opening / closing weir suddenly increases. The generation of a torrent due to the discharge of water is suppressed, and the inconvenience of the opening / closing mechanism being damaged by an impact or a collision due to rapid movement of the opening / closing weir and the weight is avoided.

[0018]

[Embodiment of the invention]

 1 and 2 are partially cutaway perspective views showing an embodiment of the open / close weir according to the present invention. FIG. 1 shows a state in which a water flow is blocked by closing the open / close weir, and FIG. The state in which the water blocked by the opening is discharged is shown. 1 and 2, the XX direction is referred to as the width direction, the YY direction is referred to as the water flow direction, and particularly the -X direction is leftward, the + X direction is rightward, the -Y direction is upstream, and the + Y direction. Is called the downstream direction. FIG. 3 is an explanatory diagram of a cross-sectional side view of the open / close weir shown in FIG. 1.

As shown in these figures, the open / close weir 1 according to the present invention is disposed so as to cross the water channel 7, and is opened and closed without using power, and the water flow is intercepted and intercepted. It discharges water from the reservoir, and is provided between a pair of ridges 71 in the width direction provided at an appropriate position of the water channel 7. In FIG. 1 and FIG. 2, for the sake of illustration, the jetty 71 on the right bank of the waterway 7 is indicated by a two-dot chain line.

Each of the jetty 71 has a pair of weirs 73 erected in the water flow direction erected on the upstream and downstream sides of a predetermined point of the bank 72, and a vertically facing portion facing the water flow between the respective weirs 73. It comprises a pair of widthwise opposed walls 74 provided over the entire length, and a pair of widthwise back walls 75 provided on opposite sides of each opposed wall 74 in the widthwise direction. An opening / closing mechanism installation space 77 for installing an opening / closing mechanism for the rotary weir 3 is formed in a space surrounded by the weir pillar 73, the opposing wall 74, and the back wall 75.

At a position on the upstream side of the jetty 71, a step portion 78 is formed so that the bottom of the water channel 7 is lowered by one step over the entire length in the width direction. An arc-shaped guide rail 76 is provided on the facing surface of each facing wall 74 so as to rise from the top of the step portion 78 toward the downstream side. It opens and closes while being guided by the guide rail 76.

The opening / closing weir 1 includes a transverse shaft 2 provided at a bottom portion so as to cross the water channel 7, a rotating weir 3 rotatably supported around the transverse axis 2, and a rotating weir 3, a lifting weir 4 that moves up and down following rotation about the transverse axis 2, a weight 5 that opens and closes the rotating weir 3 with the weight balance of the rotating weir 3 and the lifting weir 4, and an upper position. It has a basic configuration including a movement transmitting mechanism 6 that transmits the movement of the weight 5 to the lower position and the movement of the inclined weir 3 to the sideways posture to the other side.

The rotary weir 3 includes a water storage tank 30 having a water storage chamber 30 a therein, a shaft support 35 slidably fitted on the transverse shaft 2, and the shaft support 35. It is provided with a connecting plate 36 for integrally connecting the water reservoir 30 with the water retaining tank 30. The shaft support cylinder 35 is fitted around a portion of the transverse shaft 2 exposed to the water channel 7 so as to extend over substantially the entire length thereof. A dimension is set so as to protrude by a predetermined length in the radial direction so as to cover the entire length in the width direction of the shaft support cylinder 35, and a water retention tank 30 is attached to a distal end side of the connection plate 36.

The water retaining tank 30 has an arc-shaped plate 31 extending in the width direction having a surface on which a damming surface 31 a is formed along an arc centered on the transverse axis 2, and both side edges of the arc-shaped plate 31 in the width direction. , A pair of fan-shaped width-direction fan-shaped plates 32 provided in the same direction, a pair of circumferential-direction circumferential plates 33 extending in the direction of the transverse axis 2 from both circumferential sides of the arc-shaped plate 31, and each circumferential plate 33. And a bottom plate 34 bridged between the edges extending in the width direction on the side of the transverse shaft 2. The water retention tank 30 is formed so as to be surrounded by the arc plate 31, the fan-shaped plate 32, the circumferential plate 33, and the arc plate 31. In addition, the water retaining tank 30 is attached to the shaft support cylinder 35 via the connecting plate 36 by fixing the leading edge of the connecting plate 36 to the surface of the bottom plate 34 by welding or the like.

The transverse shaft 2 penetrates the opposing wall 74 between the lower end portions on the downstream side of the pair of opening / closing mechanism-equipped spaces 77 in the width direction, and is inserted into the water channel 7. A pair of fan-shaped plates 32 in the width direction are inserted and fixed to the transverse shaft 2 so that the rotary weir 3 rotates together with the rotation of the transverse shaft 2 around the axis.

The rotating weir 3 rotates clockwise around the axis of the transverse shaft 2 so that the circumferential plate 33 on the downstream side abuts against the stopper 76 d to stop the water in the water channel 7 on the upstream side. The rotation range is set so that the posture becomes an inclined posture and the posture can be changed between a horizontal lying posture that extends substantially horizontally by rotating the transverse shaft 2 around the axis in a counterclockwise direction. In the present embodiment, the rotation range of the rotation weir 3 is set to 0 ° to 45 ° with respect to the horizontal plane.

In addition, a slit-shaped water inlet 37 is provided in the upper part of the circular arc plate 31 over substantially the entire length in the width direction, whereby the rotary weir 3 is set in an inclined posture, and The stored water flows from the water inlet 37 into the water storage chamber 30 a of the water storage tank 30 with the water level of the stored water in the water channel 7 reaching the water inlet 37.

The water retention tank 30 has a small hole for water discharge (a hole for draining) 38 at the bottom, and a large amount of water introduced into the water retention tank 30 from the water inlet 37. Water is discharged little by little to the downstream side of the water channel 7 through the small hole 38 for water discharge. Further, a drain pipe 38a communicating with the small hole 38 for water discharge is provided, and a valve 38b is attached to the drain pipe 38a. By changing the opening of the valve 38b, the discharge speed of water in the water retaining tank 30 discharged through the drain pipe 38a can be adjusted.

The lifting weir 4 is composed of an upper lifting weir 4a, which is located on the upstream side of the facing wall 74 of the jetty 71 and rises and descends, and a lower lifting weir 4b, which is located on the downstream side of the upper lifting weir 4a and rises and falls. On the other hand, the guide rail 76 has a first guide rail 76a for the upper lift dam 4a, a second guide rail 76b for the lower lift dam 4b, and a third guide rail 76c for the water retention tank 30. The upper lifting weir 4a is guided by the first guide rail 76a to move up and down, and the lower lifting weir 4b is guided by the second guide rail 76b to move up and down. The surface of the arc plate 31 rotates around the transverse axis 2 while sliding on the third guide rail 76c.

The first guide rail 76a is formed by a pair of ridges in the water flow direction along an arc centered on the transverse axis 2, and upper ends of these ridges are connected to form a stopper. The first guide rail 76a has a lower position where the upper lifting / lowering weir 4a in which both ends are fitted is immersed on the downstream side of the stepped portion 78, and a lower end edge projecting upward from the upper edge of the stepped portion 78. The perimeter is set so that it can be raised and lowered between the upper position where it has risen to an insignificant degree.

The second guide rail 76b is formed by a pair of ridges in the water flow direction along an arc having a smaller radius of curvature than the first guide rail 76a, and the upper ends of these ridges are connected to each other to form a stopper. Has become. The second guide rail 76b has a lower position where the lower elevating weir 4b with both ends fitted therein is immersed on the downstream side of the stepped portion 78, and a lower edge portion is located upward from an upper edge portion of the waterway 7. The perimeter is set so that it can move up and down between the upper position that has risen to the extent that it does not come out.

The upper and lower weirs 4 a and 4 b are formed of a rectangular parallelepiped metal box having an open entire surface on the downstream side, and include a front plate 41, a bottom plate 42, a top plate 43, and It is integrally formed by a pair of side plates 44 in the width direction. Each of the side plates 44 is provided with a guided wheel 45 rotatably supported around a pair of vertical shafts 45a extending in the width direction so as to be rotatable around a pair of horizontal shafts 45a. The guided wheel 45 is stably moved up and down by being guided by the first guide rail 76a and the second guide rail 76b.

The lower elevating weir 4 b has a first support plate 46 protruding toward the upstream side on the lower surface of the bottom plate 52. The amount of protrusion of the first support plate 46 is set slightly smaller than the length of the upper surface plate 53 in the water flow direction. Such a first support plate 46 is inserted into the upper lifting weir 4a, and the front plate 51 of the lower lifting weir 4b is in contact with the leading edge of the upper surface plate 43 of the upper lifting weir 4a. 4b is connected to the upper elevating weir 4a. Therefore, the upper lifting weir 4a is raised and lowered by moving the lower lifting weir 4b up and down together with the lower lifting weir 4b while the upper surface plate 43 is suspended by the first support plate 46. I have.

The one circumferential plate 33 of the water retention tank 30 is provided with a second support plate 39 protruding toward the upstream side. The amount of the second support plate 39 projecting upstream is set slightly smaller than the length of the upper surface plate 43 of the lower lifting / lowering weir 4b in the water flow direction, and the first movable weir 4 is separated from the bottom of the water channel 7. By raising and lowering the water retaining tank 30 in this state, the lower lifting weir 4b is hung on the second support plate 39 via the upper surface plate 43, and is thereby hung on the lower lifting weir 4b and the lower lifting weir 4b. Both upper and lower weirs 4a are adapted to move up and down.

The distal end of the second support plate 39 is formed in a comb shape over the entire length in the width direction, while the bottom plate 42 of the upper elevating weir 4 a is formed as a comb tooth of the second support plate 39. The teeth of the second support plate 39 and the teeth of the bottom plate 42 of the upper elevating weir 4a are formed in a comb-like shape in which each tooth is shifted one by one in the width direction. The pitch of the teeth is set so that they can pass each other, so that the second support plate 39 of the water retaining tank 30 is positioned lower than the bottom plate 42 of the upper descent weir 4a with the upper descent weir 4a located at the lower position. It is possible to descend to.

The motion transmission mechanism 6 penetrates a downstream sprocket (weir-side sprocket) 61 provided at both ends of the transverse shaft 2 and a pair of opposing walls 74 on the upstream side of the transverse shaft 2 and a water channel 7. , An upstream sprocket (weight sprocket) 63 provided at both ends of the support shaft 62, and a chain 64 stretched between the sprockets 61, 63. It is configured. The downstream sprocket 61, the upstream sprocket 63, and the chain 64 are housed in a space 77 for opening and closing a pair of ridges 71 in the width direction. In the present embodiment, the sprockets 61 and 63 have the same tooth number ratio.

The weight 5 is formed of a solid metal or concrete cylinder, and the weight support rod 51 is fixed to both ends of the support shaft 62 so as to extend in the radial direction. The weight 5 is concentrically fitted to the tip end of the weight supporting rod 51. When the rotary weir 3 is set in the inclined posture, the weight supporting rod 51 extends substantially horizontally toward the downstream side and is set at a lower position (FIG. 1). When the moving weir 3 is set in the lying position, the weight support rod 51 extends obliquely upward and is set at the upper position (FIG. 2), so that the rotation range around the support shaft 62 is set. Have been. In the present embodiment, the weight 5 is rotatable within a range of −20 ° to + 45 ° with respect to a horizontal plane.

In the present embodiment, the total rotation moment of the rotating weir 3 and the lifting weir 4 around the transverse axis 2 in a state where the water remains in the water retaining tank 30 is full of the weight 5 The two moments are set so as to be slightly larger than the rotational moment about the support shaft 62.

Specifically, as shown in FIG. 3, the total weight of the rotary weir 3 and the lifting weir 4 in a state where the water retaining tank 30 is substantially full of water is represented by W1 (kg), In this state, the distance between the axis of the transverse shaft 2 and the position of the center of gravity of the combined state of the rotary weir 3 and the lifting weir 4 is L1 (m), and the weight of the pair of weights 5 is W2 (kg), the distance between the axis of the support shaft 62 and the position of the center of gravity of the weight 5 is L2 (m), and the distance between the axis of the transverse shaft 2 in a state where the rotary weir 3 is set in the inclined posture. The angle of the straight line connecting the center of gravity of the rotary weir 3 with respect to the horizontal plane is θ1, and the straight line connecting the axis of the support shaft 62 and the center of gravity of the weight 5 with the weight 5 set at the lower position is defined with respect to the horizontal plane. When the angle is θ2, the capacity of the water retention tank 30 and the weight of the weight 5 and the like are set so that L1cosθ1 × W1> L2cosθ2 × W2 holds. The specification has been decided.

Accordingly, if the total weight of the rotary weir 3 and the lifting weir 4 when the water retaining tank 30 is not filled with water is W1 ′ (kg), L1cosθ1 × W1 ′ <L2cosθ2 × W2. .

A hydraulic damper 65 is provided in each opening / closing mechanism equipment space 77 for slowing the rotation speed of the rotary weir 3 about the transverse axis 2. The hydraulic damper 65 has its upper end rotatably supported around a short axis 745 extending between the opposed wall 74 and the rear wall 75, and the damper rod 65a is connected to the weight supporting rod. 51 is attached to the center part so as to be rotatable around the axis. The lifting / lowering speed of the weight 72 and the water tank 30 is suppressed by the protrusion and retreat of the hydraulic damper 65 in a state where the damper rod 65a is in a shocked state, so that the weight 72 and the water tank 30 move suddenly. For example, such an adverse effect that the rotary weir 3 collides with the ridge 76 and is broken, for example, is prevented.

FIG. 4 is a side view for explaining the operation of the opening / closing weir 1. FIG. 4A shows a state in which the rotating weir 3 is set in an inclined posture, and FIG. Each of the figures shows a state in which the weir 3 is set to the prone position. First, in the state shown in FIG. 4A, the water level in the water channel 7 is low, and the water does not flow into the water storage chamber 30a of the water storage tank 30 through the water inlet 37, so that the water storage chamber 30a is empty. In this state, the rotational moment (W2 × L2) of the weight 72 is larger than the rotational moment (W1 × L1) of the water retaining tank 30. Therefore, the weight 72 is weighted by the weight 72. Is rotated counterclockwise about the support shaft 62 and located at a lower position, and the rotation is transmitted to the transverse shaft 2 via the upstream sprocket 63, the chain 64, and the downstream sprocket 61, whereby the water is The retaining tank 30 is co-rotated counterclockwise around the transverse axis 2 and is set in an inclined posture in which the arc plate 31 abuts against the stopper 76d.

In this state, the second support plate 39 of the water retention tank 30 lifts the upper surface plate 43 of the upper elevating weir 4a upward, and the first support plate 46 of the upper elevating weir 4a is on the lower elevating weir 4b. The face plate 43 is lifted upward, whereby the upper and lower lifting weirs 4a and 4b rise while being guided by the second guide rail 76b and the first guide rail 76a, respectively. The water on the upstream side is blocked by the spread open / close weir 1.

Then, as shown by a two-dot chain line in FIG. 4A, when the water level on the upstream side of the open / close weir 1 rises to the water inlet 37 of the water holding tank 30, the water is collected through the water inlet 37. The water flows into the water storage chamber 30a of the tank 30, and is sequentially stored. When the water level in the water storage chamber 30a reaches the water inflow port 37 and becomes full, the rotation moment on the water storage tank 30 side becomes larger than the rotation moment of the two weights 72. It turns counterclockwise around the transverse axis 2 and assumes a prone position, and along with this, the lifting dams 4a and 4b also descend, and as shown in FIG. It will be in the state of being put. At the same time, the rotation of the transverse shaft 2 is transmitted to the support shaft 62 via the downstream sprocket 61, the chain 64, and the upstream sprocket 63, and the rotation is caused by the counterclockwise rotation of the support shaft 62 around its axis. The weight 5 also rotates counterclockwise to be in the upper position.

When the rotary weir 3 is in the sideways posture, the water accumulated on the upstream side of the open / close weir 1 flows down the downstream side beyond the rotary weir 3, so-called discharge of the weir is performed. As a result, the water level of waterway 7 is lowered to the lowest level. In this state, the water in the water storage chamber 30a of the water storage tank 30 is gradually discharged through the small water discharge hole 38, so that the weight of the water storage tank 30 side is gradually reduced. Then, when the rotational moment on the water retaining tank 30 side becomes smaller than that of the two weights 72, each weight 72 starts to descend, whereby the water retaining tank 30 rises and the rotating weir 3 Returns to the closed state shown in FIG.

According to the present invention, as described in detail above, a predetermined amount of water is stored in the water storage tank 30 only by the amount of the stored water stored in the water storage tank 30 and the weight balance with the weight 72. In a state where the water is not stored, the rotary weir 3 is closed, and when the inside of the water retaining tank 30 is full of water, that is, when the water level on the upstream side of the rotary weir 3 exceeds the upper limit, the rotary weir 3 is opened. As a result, it is possible to reduce the equipment cost and operating cost compared to the conventional one that uses a drive mechanism and consumes energy such as electric power to open and close the weir. It is possible and very useful from the viewpoint of resource saving and energy saving.

The present invention is not limited to the above embodiment, but also includes the following contents.

(1) In the above-described first embodiment, the rotation operation of the rotation weir 3 and the rotation operation of the weight 5 are configured to be transmitted to each other by the chain 64, and the second embodiment In this embodiment, the rotation is transmitted to each other by a link mechanism, but instead of the chain 64 and the link mechanism, the rotary weir 3 and the weight 5 are connected by a wire or connected by a gear mechanism. May be.

(2) In the above-described first embodiment, the sprocket has a 1: 1 gear ratio, but the gear ratio may be changed. In this way, without changing the other specifications of the weir 1, actions such as increasing the response of opening and closing the swirl weir 3 and conversely, taking action are taken according to the condition of the water channel 7 in which the weir 1 is provided. It becomes possible.

(3) In the above embodiment, the rotation range of the rotary weir 3 with respect to the horizontal plane is set to −20 to + 45 °. Is not limited to be set to −20 to 45 °, and the rotation range may be set in an angle range of less than 65 °, or may be set to 65 ° or more.

[0051]

[Effect of the invention]

 According to the opening / closing weir of the first aspect of the present invention, a horizontal axis extending in the horizontal direction is provided so as to traverse the water channel, and the tilting posture and the horizontal posture are supported rotatably around the horizontal axis. The rotation weir provided to be able to change its attitude between the posture and the upper position where the water flow is stopped by moving up and down following the rotation of the rotation weir about the transverse axis, and the water flow weir At least one lifting weir provided so as to be changeable from the lower position to be released, a water retention tank attached to the tip side of the rotating weir, and a weight that makes the rotating weir inclined by weight. The rotating weir has a water weir blocking surface extending in the circumferential direction around the transverse axis, and the lifting weir is located at the lower position and horizontally on the water blocking surface of the rotating weir. The water retention tank has a water inlet at the top and a water inlet at the bottom. A drain hole with a small opening area is drilled, and the weight is adjusted to balance the total weight of the rotating weir and the lifting weir when a predetermined amount of water is stored in the retaining tank. Due to the weight setting, in a state where water is not stored in the water retention tank, the weight of the weight causes the water retention tank to rotate in a predetermined direction around the transverse axis, whereby the rotary weir is set to the inclined posture. The opening / closing weir is closed by the lifting weir located at an upper position following the rotating weir, and the flowing water in the upstream waterway can be blocked.

When the level of the blocked water rises and reaches the water inlet of the rotary weir, water enters the water retention tank from there, and the weight of the water retention tank side exceeds the weight of the weight. Then, with the weight, the water retention tank rotates around the transverse axis in the opposite direction and descends, whereby the water in the blocked water channel can be discharged to the downstream side.

After that, the water stored in the water retention tank is discharged to the outside through the hole at the bottom, so that the weight of the water retention tank side becomes lighter than the weight of the weight. The descent tank rises due to the descent of, and the rotating weir and the elevating weir can be returned to the original closed state again.

As described above, according to the water storage condition of the water channel, that is, when the rotation weir and the rising / falling weir are closed and the water above the limit is stored upstream thereof, the water is automatically rotated without using power. When the weir is opened and water is released, and when the amount of stored water is reduced, the rotating weir is automatically closed. Equipment costs and operating costs can be reduced.

According to the open / close weir of the present invention, the weight is rotatably supported around the support shaft so as to be changeable between an upper position and a lower position. The weight is such that the rotating weir is set to the inclined position when the weight is located at the lower position, and the rotating weir is set to the prone position when the weight is located at the upper position. Due to the connection, when the water tank was not filled with water, the weight was heavier than the water tank and the weight balance between the weight and the water tank was lost, and the weight was located at the lower position. In this state, the water tank connected to the weight is placed in the inclined position, whereby the rotary weir can be closed.

Then, the water level stopped by the rotating weir and the elevating weir exceeds a predetermined height level, and the water flows from the water inlet into the water retention tank, whereby the water retention tank containing the water is provided. If the weight on the side exceeds the weight of the weight, on the contrary, the water tank descends and changes its posture to the prone position, and the rotary weir opens, so that the upstream water stored in the weir must be discharged. Can be. Next, the water retention tank becomes lighter than the weight due to the drainage of the water inside, and the water retention tank changes its attitude to the inclined attitude due to the change in the position of the weight to the lower position. By changing the attitude, the rotary weir can be returned to the original closed state.

According to the opening / closing weir of the third aspect of the present invention, the weir-side sprocket is provided concentrically on the transverse shaft, and the weight-side sprocket is provided concentrically on the support shaft. The rotation around the axis of the support shaft due to the lowering of the weight is transmitted to the transverse axis via the weight-side sprocket, the chain, and the weir-side sprocket. The turning weir can close the turning weir. In addition, the rotation of the transverse shaft around the axis center due to the lowering of the water retention tank is transmitted to the support shaft via the weir-side sprocket, the chain, and the weight-side sprocket, thereby rotating the support shaft around the axis. The weight can be raised by motion.

According to the open / close weir of the fourth aspect of the present invention, a guide rail for guiding the elevating weir to move up and down is provided, and the guide rail is formed along an arc centered on the transverse axis. A lifting member is provided at the lower edge of the water blocking surface of the weir to lift the lifting weir.When the rotating weir turns around the transverse axis and shifts to the inclined position, the lifting weir is lifted by the lifting member. Therefore, when the rotary weir is set to the inclined posture, the vertical weir is connected to the lower end of the rotary weir, thereby closing the open / close weir. In addition, since the lift weir is guided by the arc-shaped guide rails to move up and down, it is possible to stabilize the lifting operation of the lift weir without deviating from the rotation locus of the rotary weir.

According to the opening and closing weir according to the fifth aspect of the present invention, since the hydraulic damper for buffering the rotation speed of the water retaining tank around the transverse axis is provided, the hydraulic damper functions to buffer the water retaining tank around the transverse axis. The rotation speed of the opening and closing weirs is slowed down, so that the sudden opening and closing of the closing and closing weirs suppresses the sudden discharge of the stored water and the rapid flow of the stored water. The inconvenience that the opening / closing mechanism is damaged by a shock or a collision due to motion can be avoided.

[Brief description of the drawings]

FIG. 1 is a partially cutaway perspective view showing an embodiment of an opening / closing weir according to the present invention, showing a state in which a water flow is blocked by closing the opening / closing weir.

FIG. 2 is a partially cutaway perspective view showing an embodiment of the opening and closing weir according to the present invention, showing a state in which water blocked by opening and closing the opening and closing weir is discharged.

FIG. 3 is an explanatory diagram of a side sectional view of the opening and closing weir shown in FIG. 1;

4A and 4B are explanatory views in a side view for explaining the operation of the opening / closing weir, wherein FIG. 4A shows a state in which the rotating weir is set to an inclined posture, and FIG. , Respectively.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Opening-and-closing weir 2 Transverse axis 3 Rotating weir 30 Water retention tank 31 Front plate 32 Side plate 33 Circumferential plate 34 Bottom plate 35 Shaft support 36 Connecting plate 37 Water inlet 38 Water discharge small hole (water drain hole) 38a Water Draft tube 38b Valve 39 Second support plate 4 Elevating weir 4a Upper elevating weir 4b Lower elevating weir 41 Front plate 42 Bottom plate 43 Upper surface plate 45 Guided wheel 5 Weight 51 Weight supporting rod 6 Motion transmission mechanism 61 Downstream sprocket 62 Support shaft 63 Upstream sprocket 64 Chain 65 Hydraulic damper 65a Damper rod 7 Waterway 71 Jetty 72 Embankment portion 73 Weir post 74 Opposing wall 745 Short axis 75 Back wall 76 Guide rail 76a First guide rail 76b Second guide rail 76c Third guide Rail 76d Stopper 77 Opening / closing mechanism equipment space

Claims (5)

[Utility model registration claims] Claims: 1. An open / close weir arranged between two banks so as to cross a waterway, and configured to open and close so as to block a flow of water and to discharge the stored water. A transverse axis extending in the horizontal direction provided so as to cross, an inclined posture pivotally supported around the transverse axis, and inclined at a predetermined angle upward with respect to a horizontal plane; A swirling weir provided so as to be able to change its attitude between a lying prone position and an upper position for blocking a water flow by moving up and down following the rotation of the swirling around a transverse axis; At least one elevating weir provided so that the position can be changed between a lower position to release the dam and a water retention tank attached to the tip side of the rotating weir,
A weight that causes the rotary weir to be inclined by weight; and the rotary weir has a water damming surface extending in a circumferential direction about the transverse axis. It is configured to horizontally overlap with the water blocking surface of the rotary weir in a state where the water weir is located at the top, and the water retaining tank has a water inlet formed at the top and an opening area at the bottom from the water inlet. A small drainage hole is drilled, and the weight is set so as to balance the total weight of the rotating weir and the lifting weir in a state where a predetermined amount of water is stored in the water retention tank. An opening and closing weir characterized by being. 2. The weight according to claim 1, wherein the weight is rotatably supported around a support shaft so that the weight can be changed between an upper position and a lower position. The rotating weir is set to an inclined posture in the state where it is located at the position, and the rotating weir is connected so as to be set to the sideways posture when the weight is located at the upper position. Opening and closing weir described in 1 3. A weir side sprocket is provided concentrically with the transverse shaft, a weight side sprocket is provided concentrically with the support shaft, and a chain is stretched between the weight side sprocket and the weir side. The open / close weir according to claim 2, wherein: 4. A guide rail for guiding the raising and lowering of the raising / lowering weir is provided, the guide rail is formed along an arc centered on the transverse axis, and the rotary weir is provided on the water weir retaining surface. 4. The open / close weir as claimed in claim 3, further comprising a lifting member for lifting the lifting / lowering weir at a lower edge of the weir. 5. The open / close weir according to claim 1, further comprising a hydraulic damper for buffering a rotational speed of the upper weir about a transverse axis.