JP3044671U - 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. The open / close weir 1 is disposed between both banks so as to cross a water channel W, and is configured to perform ascending and descending to block a water flow and to release the blocked water. The lower weir 3, the first movable weir 4, and the second movable weir 5 provided at the bottom of the W, and the lower weir 20 are provided so as to be able to ascend and descend in a state of overlapping the lower weir 20 in the horizontal direction. An upper weir 6 and a weight 72 for raising the upper weir 6 by weight are provided.
Is formed in a container shape in which a long hole 61a for water inflow is formed so that a predetermined amount of water can be stored therein,
A small hole 62a for water discharge is formed at the bottom, and a weight 72
Is set so as to balance with a predetermined amount of water stored in the upper weir 6.

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-described problems, and it is possible to reliably set the level of the water storage amount in a water channel while keeping the equipment costs and operation costs low. The purpose is to provide an open / close weir.

[0006]

[Means for Solving the Problems]

 The opening and 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 perform ascending and descending to block the water flow and discharge the blocked water. A weir comprising a lower weir provided at the bottom of the waterway, an upper weir slidably contacting the lower weir on the downstream side and capable of ascending and descending, and a weight for raising the upper weir by weight. The upper weir is formed so as to be able to store a predetermined amount of water therein, and has a water inlet and a drain hole formed at the upper and lower portions on the upstream side, respectively. The weight is set so as to balance with a predetermined amount of water stored in the upper weir.

[0007] According to this open / close weir, when no water is stored in the upper weir, the upper weir rises due to the weight of the weight, and the open / close weir of the water channel is closed. The water flowing in the water channel upstream of the weir is blocked. Then, when the water level of the water blocked by the closed upper weir rises and reaches the water inflow port, water enters the upper weir from here, and the weight of the upper weir side gradually increases. When the weight of the upper weir side exceeds the weight of the weight due to the inflowing water, the upper weir descends with this weight, and the water in the blocked waterway passes through the top of the upper weir and flows downstream. Flow down to

After that, the water stored in the upper weir is discharged to the outside through the hole at the bottom, so that the weight of the upper weir becomes lighter than the weight of the weight. The weir rises and returns to the original state where the open / close weir is closed again.

As described above, in accordance with the water storage condition of the water channel, that is, when the maximum amount of water is stored upstream from the closing of the open / close weir, the open / close weir is automatically opened without using power. Since the open / close weir is automatically closed when the water is released and the amount of stored water decreases, the equipment cost and operating cost are reduced as compared with the conventional type, in which the open / close weir is opened and closed by, for example, driving the electric drive means. Is done.

According to a second aspect of the present invention, there is provided an opening / closing weir according to the first aspect, wherein the lower weir is a lowermost weir fixed to a bottom of a water channel, and a lowermost weir is slid to the lowermost weir. The movable lower weir is provided so as to be able to move up and down while being in contact with the lower weir, and the upper weir has a suspending member for suspending the movable lower weir.

[0011] According to this opening / closing weir, the movable lower weir rises while being suspended by the suspending member due to the rise of the upper weir. Therefore, when the upper weir is raised to the highest level, the movable lower weir is blocked. The height of the movable lower weir is added to the height, thereby increasing the amount of water storage. In addition, by lowering the upper weir, the suspended state of the movable lower weir is eliminated, and the height of the weir can be reduced to the maximum.

According to a third aspect of the present invention, there is provided an opening / closing weir according to the second aspect, wherein the movable lower weir is provided so as to move up and down in sliding contact with an upstream one. And the downstream movable weir has a suspending member for suspending the upstream movable weir.

[0013] According to this open / close weir, the fluctuation range of the water storage amount on the upstream side of the open / close weir can be increased by raising and lowering at least two movable lower weirs.

According to a fourth aspect of the present invention, there is provided the opening / closing weir according to any one of the first to third aspects, wherein a hydraulic damper for buffering a vertical movement of the upper weir is provided. It is.

According to this open / close weir, the up-and-down speed of the upper weir and the weight is suppressed by the damping action of the hydraulic damper, so that the inconvenience that the upper weir, the weight, and the like are damaged by a collision due to a sudden rise and fall is avoided. You.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 1 and 2 are partially cutaway perspective views showing an embodiment of an opening / closing weir according to the present invention, and FIG. 1 shows that a water flow is blocked by closing the opening / closing weir. FIG. 2 shows a state in which the water blocked by the opening and closing of the open weir is discharged. 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.

As shown in these figures, the opening / closing weir 1 basically includes a weir member 2 extending between both banks of the water channel W, and an elevating mechanism 7 for raising and lowering a part of the weir member 2. It has a configuration. The weir member 2 includes a lower weir 20 laid at the bottom of the water channel W over the entire length in the width direction, and an upper weir 6 provided downstream of the lower weir 20.

The lower weir 20 is made of a concrete lowermost weir 3 laid so as to cross the water channel W at the bottom, and is overlapped with the lowermost weir 3 in the horizontal direction downstream of the lowermost weir 3. A first movable weir 4 is provided, and a second movable weir 5 is provided on the downstream side of the first movable weir 4 so as to overlap the first movable weir 4 in the horizontal direction. The first movable weir 4 can move up and down with its upstream surface slidingly contacting the downstream surface of the lowermost weir 3, and the second movable weir 5 has an upstream surface that is the same as that of the first movable weir 4. It can be moved up and down in sliding contact with the downstream surface.

The height dimension of the lowermost weir 3 is set to be substantially the same as the vertical dimension of the first movable weir 4, whereby the first movable weir 4 is lowered to the lowermost part of the movable range, The top surface of the movable weir 4 and the top surface of the first movable weir 4 are substantially flush. Also, the vertical dimension of the first movable weir 4 and the vertical dimension of the second movable weir 5 are set to be substantially the same, whereby the first movable weir 4 and the second movable weir 5 are located at the bottom of the movable range. In such a state, these top surfaces are substantially flush with each other.

The first movable weir 4 and the second movable weir 5 are each formed by a rectangular parallelepiped metal box having an open entire surface on the downstream side, and have front plates 41 and 51 and bottom plates 42 and 52. , Upper plates 43 and 53 and a pair of side plates 44 and 54 in the width direction. Each of the side plates 44, 54 is provided with a pair of vertically guided wheels 45, 55 rotatably supported around horizontal shafts 45a, 55a extending in the width direction. The movable weir 5 moves up and down stably by the guided wheels 45 and 55 being guided by predetermined guide grooves.

The second movable weir 5 has a first support plate (suspension member) 56 protruding toward the upstream side on the lower surface of the bottom plate 52. The amount of protrusion of the first support plate 56 is set slightly smaller than the length of the upper surface plate 53 in the water flow direction. Such a first support plate 56 is inserted into the first movable weir 4, and the front plate 51 of the second movable weir 5 is in contact with the leading edge of the upper surface plate 43 of the first movable weir 4. The second movable weir 5 is connected to the first movable weir 4. Therefore, the first movable weir 4 is moved up and down with the bottom plate 42 being separated from the bottom of the water channel W, so that the top plate 43 is suspended by the first support plate 56. It moves up and down together with the second movable weir 5.

The upper weir 6 is formed by a metal rectangular parallelepiped having a hollow inside, and includes a front plate 61, a bottom plate 62, a top plate 63, a pair of side plates 64 in the width direction, and a back plate 65. , A water storage chamber 66 is formed inside. The front plate 61 of such an upper weir 6 is provided with a horizontally elongated water inflow hole 61a extending over substantially the entire length in the width direction at the upper part, and the water is collected in a water storage chamber 66 on the bottom plate 62. A small hole for draining water (a hole for draining) 62a for discharging the water little by little is formed, and a large amount of water introduced into the water storage chamber 66 from the long hole for water inflow 61a is formed. The water is discharged little by little to the downstream side of the water channel W through the small holes 62a for water discharge.

The bottom plate 62 is provided with a drain pipe 67 communicating with the small hole 62 a for water discharge, and a valve 67 a is attached to the drain pipe 67. By changing the opening of the valve 67a, the discharge speed of water in the water storage chamber 66 discharged through the drain pipe 67 can be adjusted.

Each of the side plates 64 of the upper weir 6 is provided with a total of four horizontal shafts 69a extending in the width direction, one at each of the four corners, and a guided wheel 69 is provided on each of the horizontal shafts 69a. It is mounted so that it can rotate around the axis. These guided wheels 69 are set to have a diameter dimension so as to be guided by a predetermined guide groove extending in a vertical direction provided on a bank portion.

A second support plate (suspension member) 68 protruding toward the upstream side is provided on the bottom surface of the bottom plate 62 of the upper weir 6. The amount of the second support plate 68 projecting upstream is set slightly smaller than the length of the upper surface plate 53 of the second movable weir 5 in the downstream water flow direction. The second movable weir 5 is suspended from the second support plate 68 via the upper surface plate 53 by raising and lowering the upper weir 6 in a state in which the second weir 4 is separated from the bottom of the water channel W. The first movable weir 4 suspended by the second movable weir 5 and the first movable weir 4 both rise and fall.

When the bottom plate 42 of the first movable weir 4 is in contact with the bottom of the water channel W, only the second movable weir 5 is moved up and down by raising and lowering the upper weir 6, and the first movable weir 5 is moved up and down. With the support plate 56 abutting on the bottom of the water channel W, only the upper weir 6 can be moved up and down.

FIG. 3 is a sectional view taken along line AA of FIG. 1, and FIG. 4 is a sectional view taken along line BB of FIG. As shown in these figures, the lifting mechanism 7 includes a pair of vertically extending mounting chambers 71 provided in the bank W1 of the water channel W in correspondence with the weir member 2, and provided in the mounting chamber 71. And a pulley mechanism 73 for moving the weight 72 up and down.

The mounting chamber 71 includes an upstream jetty W2 protruding from the bank W1 toward the water channel W on the upstream side of the weir member 2 and a downstream side protruding similarly on the downstream side of the weir member 2. It is formed between the jetty W3. A pair of side walls 71a made of a steel plate are lined on the opposing surfaces of these side jetties W2 and W3, and a partition plate 71b made of a steel plate is bridged at an entrance side between the side walls 71a to form the mounting chamber 71. Is formed in a space surrounded by the partition plate 71b, the pair of side walls 71a, and the back wall 71c.

An upper and lower guide for guiding the guided wheels 45, 55, 69 in a space surrounded on three sides by a surface of the partition plate 71 b and a portion of the pair of side walls 71 a on the tip side of the partition plate 71 b. A plurality of guide grooves extending in the direction are formed. The guide groove includes a first guide groove 71d for guiding the guided wheel 45 of the first movable weir 4, a second guide groove 71e for guiding the guided wheel 55 of the second movable weir 5, and an upper weir. 6 and a third guide groove 71f for guiding the guided wheel 69. The movable weirs 4, 5 and the upper weir 6 guide the guide walls 71d, 71e, 71f in the direction of flowing water. The wheels 45, 55, and 69 roll up and down while being guided by the guide grooves 71d, 71e, and 71f.

The weights 72 are formed of concrete blocks, and two weights 72 are provided in the flowing water direction per one pair of the mounting chambers 71 in the width direction. These weights 72 are set to the same weight. The total weight of the weights 72 is set slightly lower than the sum of the maximum storage amount that can be stored in the water storage chamber 66 of the upper weir 6 and the weight of the upper weir 6. Incidentally, the maximum storage amount is such that the water on the upstream side of the weir member 2 flowing into the water storage chamber 66 from the water inflow hole 61a reaches the height level of the water inflow hole 61a. Is the weight of the water stored in the water storage chamber 66 at the time.

The back wall 71c of the mounting chamber 71 is provided with a frame 71g extending in the direction of flowing water bridged between the side walls 71a at an upper position. The pulley mechanism 73 includes a pair of support shafts 74 running in the flowing water direction, which protrude from the frame 71g so as to extend in the width direction, and a pair of sheaves 75 rotatably supported around the support shaft 74. And a pair of wires 76 wound around the sheave 75, and a hydraulic damper 77 erected at the center between the side walls 71a.

On the other hand, a long hole 710b extending in the vertical direction is formed at the center of the partition plate 71b in the flowing water direction, and the side plate 64 of the upper weir 6 faces outward in the width direction. A first support rod 64a penetrates the elongated hole 710b, and a second support rod 64b is fixed to the distal end of the first support rod 64a so as to extend toward the upstream and downstream in the flowing water direction. Then, the first support rod 64a moves up and down in the elongated hole 710b by the elevation of the upper weir 6 thereby, and the second support rod 64b moves up and down accordingly.

One end of each of the wires 76 is connected to each end of the second support rod 64 b, and the other end is connected to each of the weights 72 while being wrapped around the corresponding sheave 75. Accordingly, in a state where the maximum storage amount of water is not filled in the upper weir 6, the weight 72 descends to raise the upper weir 6 and the weir member 2 is closed, and the upper weir 6 is closed. When the maximum amount of stored water is filled, the upper weir 6 descends with its weight, and the weir member 2 is opened.

The upper and lower portions of the hydraulic damper 77 are fixed to the frame 71g, and the damper rod 77a is fixed to the center of the second support rod 64b. The up-and-down speed of the weight 72 and the upper weir 6 is suppressed by the buffering vertical movement of the damper rod 77a, so that the adverse effects of the weight 72 and the upper weir 6 abruptly moving are prevented.

FIGS. 5A and 5B are explanatory views for explaining the operation of the present invention. FIG. 5A shows a state in which the weir member 2 is closed, and FIG. 5B shows a state in which the weir member 2 is open. Is shown. First, in the state shown in (a), since the water level in the water channel W is low and the water does not flow into the water storage chamber 66 of the upper weir 6 through the water inflow hole 61a, the water storage chamber 66 becomes empty. In this state, the weight of the weight 72 is larger than the weight of the upper weir 6, and therefore, the weight 72 is lowered by the weight of the weight 72, whereby the upper weir 6 is pulled by the wire 76 and raised. It is in a state.

When the upper weir 6 rises, the second support plate 68 of the upper weir 6 is in a state of lifting the second movable weir 5 via the upper surface plate 53 and the first support plate of the second movable weir 5 In this state, the first movable weir 4, the second movable weir 5, and the upper weir 6 rise in steps in the weir member 2. It is set to the closed state.

Next, as shown by a two-dot chain line in FIG. 5A, when the water level on the upstream side of the weir member 2 rises to the water inflow hole 61 a of the upper weir 6, the water is discharged. The water flows into the water storage chamber 66 of the upper weir 6 through the long hole 61a, whereby the water is sequentially stored in the water storage chamber 66. Then, when the water level in the water storage chamber 66 reaches the water inlet slot 61a and becomes full, the weight of the upper weir 6 side (ie, the total weight of the upper weir 6 and the water in the water storage chamber 66). Becomes larger than the total weight of the four weights 72, whereby the upper weir 6 descends, and the second movable weir 5 descends due to the lowering of the upper weir 6. Is lowered, and the dam member 2 is opened as shown in FIG.

When the weir member 2 is opened, the water accumulated on the upstream side of the weir member 2 flows down over the weir member 2 to the downstream side, so-called discharge of the weir is performed. The water level goes down to the lowest level. In this state, since the water in the water storage chamber 66 of the upper weir 6 is gradually discharged through the small water discharge hole 62a, the weight of the upper weir 6 is gradually reduced. Then, when the weight of the upper weir 6 becomes lighter than the weight of the four weights 72, each of the weights 72 starts to descend, whereby the upper weir 6 rises, and the weir member 2 is moved as shown in FIG. ).

According to the present invention, as described in detail above, a predetermined amount of water is stored in the upper weir 6 only by the amount of the stored water stored in the upper weir 6 and the weight balance with the weight 72. When the upper weir 6 is full of water, that is, when the water level on the upstream side of the weir member 2 exceeds the upper limit, the weir member 2 is opened when the weir member 2 is closed. However, it is possible to reduce the equipment cost and operating cost compared with the conventional one that uses a drive mechanism and consumes energy such as electric power to open and close the weir. Is extremely useful.

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

(1) In the above embodiment, the lowermost weir 3 is formed by raising the bottom of the water channel W upward, but the present invention raises the bottom of the water channel W to raise the lowermost weir. The present invention is not limited to providing the weir 3, and a movable weir corresponding to the lowermost weir 3 may be provided without providing the lowermost weir 3. Instead of providing the lowermost weir 3, the bottom of the water channel W downstream of the first movable weir 4 may be set at a lower level by the height of the first movable weir 4. This makes it possible to discharge all water upstream of the weir member 2 to the downstream side of the weir member 2 in a state where the weir member 2 is open.

(2) In the above embodiment, the movable weir is formed in two stages of the first movable weir 4 and the second movable weir 5, but in the present invention, the movable weir is formed in two stages. The number of stages is not limited to one, and may be one or three or more depending on the surrounding conditions such as the scale and use of the water channel W.

[0043]

[Effect of the invention]

 According to the opening / closing weir of claim 1 of the present invention, the opening / closing weir is provided at the bottom of the waterway, and the upper weir is provided so as to be able to ascend and descend while sliding on the lower weir on the downstream side. The upper weir is composed of a weight that rises by weight.The upper weir is formed so that a predetermined amount of water can be introduced and stored from the water inlet, and a drain hole is drilled at the bottom. The weight of the weight is set so as to balance with the specified amount of water stored in the upper weir.In the state where water is not stored in the container-shaped upper weir, the weight is determined by the weight of the weight. The upper weir rises, and the open / close weir of the canal is closed, so that the flowing water in the canal upstream of the open / close weir can be blocked.

Then, when the level of the water blocked by the closed upper weir rises and reaches the water inflow port, water enters the upper weir from there, thereby gradually increasing the weight of the upper weir side and flowing in. If the weight of the upper weir side exceeds the weight of the weight due to the water, the upper weir can be lowered by this weight, and the water in the blocked waterway passes through the top of the upper weir to the downstream side. Can flow down.

After that, the water stored in the upper weir is discharged to the outside through the hole at the bottom, so that the weight of the upper weir side becomes lighter than the weight of the weight. The weir rises and the open / close 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 maximum amount of water is stored upstream from the closing of the open / close weir, the open / close weir is automatically opened without using power. When the water is released and the amount of stored water decreases, the open / close weir is automatically closed.Therefore, equipment costs and operating costs are reduced compared to the conventional type, in which the open / close weir is opened and closed by, for example, driving the electric drive means. Can be achieved.

According to the opening / closing weir of the second aspect of the present invention, the lower weir is provided with the lowermost weir fixed to the bottom of the water channel and movable up and down while slidingly contacting the lowermost weir on the downstream side. Since the upper weir is provided with a suspending member for suspending the movable lower weir, the movable lower weir rises while being suspended by the suspending member due to the rise of the upper weir, When the upper weir is raised to the highest level, the dam height is added to that of the movable lower weir, thereby increasing the water storage. In addition, by lowering the upper weir, the suspended state of the movable lower weir is eliminated, so that the height of the weir can be reduced to the maximum.

According to the opening and closing weir of the present invention, the lower weir can be moved up and down in a state where the lower weir is fixed to the bottom of the waterway and overlaps the lowermost weir in the horizontal direction. It is composed of at least two movable lower weirs, so that the movable lower weir can be moved up and down to increase the fluctuation range of the amount of water stored upstream of the open / close weir. It is valid.

According to the opening and closing weir according to the fourth aspect of the present invention, since the hydraulic damper for buffering the elevation speed of the upper weir and the weight is provided, the lifting and lowering speed of the upper weir and the weight is reduced by the buffering action of the hydraulic damper. As a result, it is possible to avoid the inconvenience that the upper weir, the weight, and the like are damaged by a collision or the like caused by a sudden rise and fall.

[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 a sectional view taken along line AA of FIG. 1;

FIG. 4 is a sectional view taken along line BB of FIG. 1;

FIG. 5 is an explanatory diagram for explaining the operation of the present invention;
(A) shows a state in which the weir member is closed, and (B) shows a state in which the weir member is open.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Opening-and-closing weir 2 Weir member 20 Lower weir 3 Lowest weir 4 First movable weir 5 Second movable weir 6 Upper weir 41,51,61 Front plate 61a Long hole for water inflow 42,52,62 Bottom plate 43,53, 63 Top plate 44, 54, 64 Side plate 45, 55, 69 Guided wheel 45a, 55a Horizontal axis 56 First support plate 65 Back plate 66 Water storage chamber 67 Drain pipe 67a Valve 68 Second support plate 69 Guided wheel 69a Horizontal axis 61 Front plate 61 7 Elevating mechanism 71 Mounting chamber 71a Side wall 71b Partition plate 710b Long hole 71c Back wall 71d First guide groove 71e Second guide groove 71f Third guide groove 71g Frame 72 Weight 73 Pulley mechanism 74 Support shaft 75 Sheave 76 Wire 77 Hydraulic damper 77a Damper rod W Waterway W1 Embankment W2 Upstream jetty W3 Downstream jetty

Claims (4)

[Utility model registration claims] 1. An open / close weir arranged between both banks so as to cross a waterway and configured to perform water blocking and discharge of stored water by ascending and descending. A lower weir provided at the bottom, an upper weir provided slidably in contact with the lower weir on the downstream side, and a weight that raises the upper weir by weight are provided, and the upper weir is internally provided. It is formed so as to be able to store a predetermined amount of water, and has a water inlet and a drain hole formed at the upper part and the bottom part on the upstream side, respectively, and the weight is stored in the upper weir. An opening / closing weir characterized in that the weight is set so as to balance with a predetermined amount of water. 2. The lower weir comprises a lowermost weir fixed to the bottom of a water channel, and a movable lower weir provided to be movable up and down while slidingly contacting the lowermost weir on the downstream side. 2. The open / close weir according to claim 1, further comprising a suspending member for suspending the movable lower weir. 3. The movable lower weir comprises at least two movable lower weirs provided so as to move up and down in sliding contact with an upstream one, and the downstream movable weir suspends the upstream movable weir. The open / close weir according to claim 2, further comprising a hanging member. 4. A hydraulic damper for damping a vertical speed of the upper weir is provided.
The open / close weir described in any one of the above.