JP3336376B2 - Labyrinth movable weir - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to an intake weir, a regulating pond,
Used for facilities that require constant water level, such as diversion works,
The present invention relates to a movable overflow weir that is configured so that a door body that stops water and allows water flowing over an upper edge to flow down can be opened and closed by raising / lowering drive, up / down rotation, pressurization / decompression, and other means.

[0002]

2. Description of the Related Art As a gate used in a facility requiring a constant water level, such as an intake weir, a regulating pond, a diversion works, etc., a door for stopping water and for letting water flow over an upper edge is driven up and down. There are movable overflow weirs (elevation gates, undulation gates, rubber weirs, etc.) that can be opened and closed by means of (1).

FIG. 9 is a cross-sectional view of a roller gate as an example. As shown in FIG. 9, the roller gate is provided with a door 72 provided between support column members 71 on both sides forming a flow path, and a lift drive mechanism such as a winch provided on the upper portion of the support column member 71. It is configured to be driven up and down by being driven up and down by 73, and to block water by the door body 72 and discharge water exceeding its upper edge, and raise the door body 72 when the water level rises due to an increase in the inflow amount. Water is discharged (underflow) from between the lower edge and the riverbed 74.

[0004] In recent years, high precision of water intake management has been required in association with the storm of low rainfall. To this end, the rising water level on the upstream side of the overflow weir has been made constant with high accuracy, and the rising flood basin has been required. It is necessary to be able to take in the required water intake strictly according to the degree of opening of the water intake gate inside.

However, in the movable overflow weir having a single door as described above, when the inflow increases and the water level exceeds the set water level as described above, the door is raised to cause an underflow. Water is discharged, but water discharge due to underflow conversely lowers the water level, making it difficult to stabilize the water level with high accuracy.

For this reason, as shown in a sectional view of a door body in FIG. 10, it is considered that a secondary gate is provided at an upper edge overflow portion of a door body of a primary gate of an overflow type, and a two-stage structure is provided. Was done. That is, in the illustrated example, an undulating door 82 is provided at the upper edge overflow portion of the door 81 of the roller gate. This allows
In normal times, the water level is adjusted according to the inflow by the undulating gate 82, and only when the inflow is suddenly increased, such as at the time of flooding, the roller gate door 81 is raised and discharged by underflow. It is.

[0007] The secondary gate provided on the door of the primary gate is not limited to the up-and-down type, but may be of the up-and-down type.

[0008]

However, the two-stage gate as described above has a complicated structure and requires a high production cost. In addition, maintenance work such as periodic replacement of the watertight seal member provided between the door of the primary gate and the door of the secondary gate is troublesome. It is necessary to operate the gate frequently, and the intake management becomes extremely complicated.

In recent years, in addition to increasing the accuracy of water intake management, labor saving and cost reduction of water intake management have been demanded along with a decrease in the number of agricultural workers and an aging population.
However, it was difficult to achieve both high precision and labor saving in water intake management even with a simple structure. In some cases, an automatic control mechanism is introduced to improve this point, but the introduction of the automatic control mechanism often causes an increase in cost of water intake management.

SUMMARY OF THE INVENTION The present invention has been made in consideration of the above-mentioned problems, and has a simple and inexpensive labyrinth movable weir which can be constructed at a low cost, does not require complicated operations, and can stabilize the rising water level with high accuracy. The purpose is to provide.

[0011]

The labyrinth movable weir according to the present invention, which achieves the above object, is driven to be opened and closed by means of up-and-down drive, up-and-down overturn or pressurization and depressurization. at least upper overflow section of the door body to flow down the water beyond the edge, labyrinth weir edge member formed by bending the uneven shape protruding alternately arranged in the longitudinal plane shape Rutotomoni, a plurality of air supply holes Air supply line with
It is characterized by being arranged along the downstream side surface of the labyrinth weir edge .

[0012]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a plan view of a roller gate, which is one configuration example of a labyrinth movable weir according to the present invention, FIG. 2 is a front view of the door body viewed from an upstream side, and FIG. 3 is a rear view of the door body viewed from a downstream side. FIG. 4 is a sectional view taken along line AA of FIG. 2, and FIG. 5 is a sectional view taken along line BB of FIG.

The illustrated roller gate 1 has a door 10 disposed between the left and right support walls 2 and 2 forming a flow path so as to be able to move up and down, and the door 10 is moved up and down by a not-shown winch or the like. Is configured to be driven up and down. At normal times, the water is blocked by the door 10 at the closed position where the door 10 contacts the riverbed surface 3 to discharge water exceeding the upper edge to maintain a constant water level, and the inflow amount at the time of flood discharge, etc. In the case where the number increases, the water can be discharged from between the lower edge and the riverbed surface 3 by raising the door body 10.

The door body 10 is provided with a labyrinth overflow section 20 provided on the upper surface of the door body 11, and rollers 12 and 13 are provided at both ends in the width direction of the weir, and a pulley 14 is provided thereon. The wire rope of the driving means (not shown) is provided inside, and the roller 12 fits into the guide groove 2 </ b> A formed in the support wall 2, and the roller 13 abuts on the opposite side surface of the support wall 2, and is wound around the pulley 14. And vertically moved along the guide groove 2A.

The door body 11 is made of a steel plate and has a box-shaped closed cross section with a sharp cross section at the lower end. Side pillars 11A are provided at both ends in the longitudinal direction (weir width direction) from the overflow water level. It is protruding high. The upper surface between the side pillars 11A, 11A at both ends is closed by a top plate 11B, and the inside of the door body 11 communicates with the entirety and an air supply port 11C formed on the back side of the side pillar 11A. Open to the outside through

As shown in FIG. 6, which is a perspective view seen from the downstream side, the labyrinth overflow section 20 has a planar shape on the top plate 11B between the side pillars 11A, 11A of the door body 11. A labyrinth weir plate 21 is formed upright as a labyrinth weir edge, which is bent and formed into triangular wave-shaped irregularities that alternately protrude upstream and downstream.

On the downstream surface of the weir plate 21, an air supply pipe 22 is provided along the weir plate 21 as an air supply line formed by a square pipe below the upper edge by a predetermined amount. A plurality of air supply holes 22A are formed in the downstream side surface of the air supply pipe 22 at predetermined intervals along the extending direction thereof.

A portion where the weir plate 21 opens to the downstream side (a portion having a concave shape when viewed from the downstream side) has a V-shape that is symmetrical with respect to the center line of the concave portion and has a downward slope toward the downstream side. Is provided.

The bend positions on the upstream and downstream sides of the weir plate 21 coincide with the edges of the top plate 11B of the door body 11 on both the upstream and downstream sides, and the air supply pipes located at the bends pointed toward the downstream side Reference numeral 22 protrudes downstream from the downstream edge of the top plate 11B of the door body 11. Air supply pipe 2 protruding downstream
2 is connected to the upper end of a communication pipe 24 whose lower end is connected to the door body 11, whereby the air supply pipe 22 is connected.
And the inside of the door body 11 communicate with each other.
A plurality of air supply holes 24A are formed in the side surface of the communication pipe 24. An arc-shaped flow straightening plate 25 obtained by dividing a cylinder having a corresponding length into four in the circumferential direction is mounted on a downstream surface of the air supply pipe 22 protruding downstream.

Thus, in the door 10 of the roller gate 1 configured as described above, the water exceeding the upper edge is not covered by the door body 1.
Overflow (over the upper edge of the weir plate 21) via the labyrinth overflow section 20 provided on the upper surface of the damper plate 1.

At the site where the weir plate 21 opens downstream,
The overflow water flows down on the door body 11,
The flow-down plate 23, which is formed in the shape of a letter and has a downward slope toward the downstream side, does not rectify and does not give an impact to the door body 11.

Here, since the water flow is separated from the back surface of the weir plate 21 and flows down, an air pocket is formed between the water flow and the back surface of the weir plate 21. Air is supplied from the communication pipe 24 via the air supply holes 22A, 24A, and vibration caused by expansion and contraction of the air reservoir is prevented. That is, the air supply pipe 22 and the communication pipe 24 communicate with the inside of the door body 11 and the door body 1
1 is open to the outside through an air supply port 11C formed on the back side of the side pillar 11A, so that outside air is supplied to the air reservoir.

In the labyrinth overflow section 20, since the weir plate 21 is formed in a zigzag shape that protrudes alternately upward and downstream as described above, the weir plate 21 is formed linearly in the flow channel width direction. The length of the top of the weir is longer than in the case where the discharge is performed, and the discharge rate per unit overflow width is increased. In other words, the discharge capacity is high, so that even if the amount of inflow increases, the upstream water level can be stably maintained without power.

For this reason, it is possible to reduce the labor cost and reduce the cost, and to make the upstream water level highly accurate without the need to construct the gate in a two-stage manner. Becomes possible.

When compared with a one-stage movable overflow weir,
The frequency of opening and closing operation of the door body 10 can be reduced, the management becomes easy, and the life of the drive mechanism can be extended. Furthermore, if the gate is set based on the discharge flow rate, the discharge capacity is high, so that the gate width can be reduced and the entire facility can be made compact, and the cost can be significantly reduced.

The overflow edge of the labyrinth type has a small overflow water depth and a long overflow length, so that a large amount of air is contained in the overflow water, so that the aeration effect is enhanced and the water quality can be improved.

The above configuration example is an example in which the present invention is applied to the door body 10 having a so-called shell structure in which the door body 11 forms a closed cross section, but the present invention is not limited to this. For example, as shown in a sectional view in FIG. 7, the present invention may be used for a door body 10 'having a plate girder structure. As shown in a perspective view seen from an upstream side in FIG. Like the weir plate in the example, the planar shape may be bent and formed into an uneven shape protruding alternately on the upstream and downstream sides.
In the figure, parts having the same functions as those in the above configuration example are denoted by the same reference numerals.

[0028]

As described above, according to the labyrinth movable weir according to the present invention, the labyrinth weir edge is formed in at least the upper edge portion of the door body so as to be bent into a concave and convex shape whose planar shape protrudes alternately back and forth. Bei Rutotomoni, a plurality of feed holes are provided
Supply line along the downstream side of the labyrinth weir
In this configuration, the weir top length is longer and the discharge flow per unit overflow width is larger than when the weir plate is formed linearly in the flow channel width direction. The discharge capacity is high, so that even if the inflow increases, the upstream water level can be maintained stably, and the back of the labyrinth weir
Air is supplied between the air and the flowing water through the air supply hole of the air supply line.
Vibration caused by the expansion and contraction of the air reservoir
Movement can be suppressed .

As a result, the upstream water level can be made constant with high accuracy without labor and at low cost without having to construct the gate in a two-stage manner. Down becomes possible.

Further, when compared with a one-stage movable overflow weir, the frequency of opening and closing operations of the door body can be reduced, the management becomes easy, and the life of the drive mechanism can be extended. Furthermore,
If the discharge flow rate is constant, the discharge capacity is high, so that the gate width can be reduced and the entire equipment can be made compact, and the cost can be significantly reduced.

The labyrinth overflow edge has a small overflow water depth and a long overflow length, so that the overflow water contains a large amount of air, which enhances the aeration effect and can contribute to the improvement of water quality.

[Brief description of the drawings]

FIG. 1 is a plan view of a roller gate which is a configuration example of a movable labyrinth weir according to the present invention.

FIG. 2 is a front view of the door viewed from an upstream side.

FIG. 3 is a rear view of the door viewed from a downstream side.

FIG. 4 is a sectional view taken along line AA of FIG. 2;

FIG. 5 is a sectional view taken along line BB of FIG. 2;

FIG. 6 is a perspective view of the labyrinth overflow section viewed from the downstream side.

FIG. 7 is a sectional view of a door of a configuration example in which the present invention is used for a door having a plate girder structure.

FIG. 8 is a perspective view of a door of a configuration example in which the entire door is formed in a labyrinth shape as viewed from an upstream side.

FIG. 9 is a sectional view of a roller gate as a conventional example.

FIG. 10 is a sectional view of a door of a two-stage gate as a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Roller gate (Labyrinth movable weir) 10 Door body 20 Labyrinth overflow part (upper edge overflow part) 21 Weir body board (Labyrinth weir edge)

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Naoto Tsuzumi 2-1-2 Kannondai, Tsukuba, Ibaraki Prefecture Inside Agricultural Engineering Research Institute, Ministry of Agriculture, Forestry and Fisheries (72) Inventor Takashi Kato 2-1-2 Kannondai, Tsukuba-shi, Ibaraki Prefecture 2 Within the Ministry of Agriculture, Forestry and Fisheries Agricultural Engineering Research Institute (72) Norio Nakanishi 2-1-2 Kannondai, Tsukuba City, Ibaraki Prefecture Within the Agricultural Technology Research Institute, Ministry of Agriculture, Forestry and Fisheries (72) Inventor Mitsutoshi Goto 3-1-1 Toyosu, Koto-ku, Tokyo No. 15 Ishikawajima-Harima Heavy Industries, Ltd.Toji Technical Center (72) Inventor Katsuya Hojo 2-45 Shibuya 2-chome, Suminoe-ku, Osaka-shi, Osaka Sumiyoshi Plant, Kurimoto Ironworks Co., Ltd. (72) Inventor Kozo Ide 5-17, Tanimachi, Chuo-ku, Osaka City, Osaka Prefecture Marushima Aqua System Co., Ltd. (56) References JP-A-3-290519 (JP, A) ( 58) Fields surveyed (Int.Cl. ⁷ , DB name) E02B 7/34

Claims (1)

(57) [Claims] A movable overflow weir, which is opened and closed by an opening / closing means, wherein a door body for stopping water and flowing down the water which has passed over an upper edge portion has a planar shape at least at an upper edge overflow portion of the door body. supply duct provided but Rutotomoni labyrinth weir edge member formed by bending the uneven shape protruding alternately provided in the front and rear, a plurality of feed holes
Is provided along the downstream side surface of the labyrinth weir edge body .