JP2022165575A - Unit type flap gate - Google Patents

Abstract

To provide a unit type flap gate which can be installed economically with a minor renovation without requiring removal of an existing gatepost, gate, etc., without the renovation of a wing wall, and without modifying a joint part.SOLUTION: The present invention comprises a support housing (socket) 2 formed so as to be fittable between an outflow port 19A on a river main stream side RM of an existing sluice gate 18 and a branch stream side inflow port 19B, and a hinged gate having a flap 1 for opening and closing the outflow port 19A and journalled in the support housing 2 with an occupation height.SELECTED DRAWING: Figure 3

Description

TECHNICAL FIELD The present invention relates to a unit-type flap gate to be installed inside the box body of an existing sluice sluice pipe, which is a structure of a river embankment.

The sluice gates and sluice pipes are constructed as works for river coastal embankments. These are structures primarily intended for draining water from rivers or channels inside the dike. In particular, at the outlet of the existing sluice sluice pipe on the main stream side of the river, a gate that acts as a door body is fitted into the gate post, etc., and when the river overflows and the water level rises during a flood, flood control is generally required. Operators, such as team members and local residents, sit at the control table on the top of the gatepost, and manually operate the opening and closing mechanism to close the gate and stop the backflow of water.

However, in recent years, the depopulation and aging of the population in depopulated areas has progressed, and the operators have also aged.

Therefore, in December 2011, the Flood Defense Law was amended, and in consideration of respect for human life and safety, there are various gates that are automatically driven by electric power without relying on human hands, or flap gates that are automatically driven without power. Proposed.

For example, Patent Literature 1 discloses that an openable and closable door is installed at the river-side outlet of a sluice while being suspended by an upper hinge mechanism so as to stop water from flowing from the river. In a flap gate that opens the sluice gate by rotating the gate body in the direction of the river against running water from the gate side, the center of gravity of the door body and the suspension core that suspends the door body pass through the buoyancy center of the buoyancy structure. By arranging it downstream from the vertical line, smooth drainage is performed when the water level on the upstream side is low or a large amount of water is drained, and backflow is prevented when the water level on the river side and the water level on the sluice pipe side are about the same. A flap gate is disclosed for

In addition, for openings in structures such as sluices, a balance weight that adjusts the opening and closing balance of the door body is composed of a main weight and an auxiliary weight, and the door body is adjusted from the fully closed state to the predetermined tilt angle. In the open range, the main weight and the auxiliary weight rotate integrally (see Patent Document 2).

It is supported by the drainage port of the irrigation channel so that it can swing freely in the direction of the water inside and outside, and swings between a lower swing position where the drain port is closed in the direction of the internal water with a drainage gap, and an upper swing position where the drain port opens in the direction of the outside water. It has a movable door body, is swingably connected to a support girder provided in an irrigation channel by an inland water-side first connecting shaft, and has a balance weight at the upper end on the outside water side of the first inland water-side connecting shaft. an attached inland water-side link; a door body whose upper end on the inland water side is swingably connected to the lower end of the inland water-side link by means of a second inland water-side connecting shaft; There is a flap gate (see Patent Document 3) which is provided with a float provided at the bottom of the gate, which has very little leakage of outside water to the inland water side, is less likely to generate noise, and does not disturb the water flow.

JP 2013-96122 A Japanese Patent No. 5503074 JP 2015-105566 A

However, when installing an electrically powered gate or a non-powered flap gate that does not require a pillar to an existing sluice gate, it is necessary to remove the existing pillar and gate, and to reconstruct the mounting part and the wing wall. Furthermore, there is a problem of modifying the joint function.
In view of the above-mentioned problems of the prior art, the present invention does not require removal of the existing gateposts, gates, etc., and can be installed economically with minor remodeling without remodeling the wing walls, and also modifies the joints. To provide a unit type flap gate which can be installed without

In order to achieve the above object, the unit type flap gate of the present invention includes a support housing (socket) formed so as to be fittable between the outflow port on the river main stream side and the river branch side inflow port of the existing sluice gate. , and a hinged gate having a flap for opening and closing the outflow port, which is pivotally supported in the support housing with an occupation height.

In addition, when the flap is pressed by backflow water from the river main stream side, the second feature is that a flap locking body is provided at the lower inner wall surface of the support housing (socket) that can dam the water flow by the closed flap. Characterized by

A third feature is that the flap is bent in a substantially inverted V shape in a side cross-sectional view, and is attached so as to be capable of pendulum movement around a support shaft provided in the upper part of the support housing (socket). .

A fourth feature is that a balance weight having a plurality of weights having a weight and a positioning function capable of balancing the buoyancy of the float attached to the flap is attached to the side of the flap on the river main stream.

Also, the plurality of weights comprises at least a first weight and a second weight, the second weight suspending the first weight so as to always be in a free hanging state, and the flap. A fifth feature is that it has a holding arm that is fixed on the skin plate adhered to the surface and holds the suspending member of the first weight.

In addition, it is formed in a rectangular ring along the outer periphery of the flap, and is integrally formed by bending at an obtuse angle so as to expand in diameter toward the outlet on the river main stream side of the existing sluice gate in a side cross-sectional view, In addition, a watertight rubber ring having a doorstop side that abuts against the inner wall surface of the support housing (socket) is disposed, and the watertight rubber ring has a rubber hardness in the range of 45 to 65 and has four corners. A sixth feature is that the amount of deflection is adjusted by changing the thickness of the top portion.

ADVANTAGE OF THE INVENTION According to this invention, there exist the following outstanding effects.
(1) For normal water flowing from the inside of the embankment, the gate body naturally rises according to the water level and flows, and when the water level rises like a flood, the gate body uses the water pressure of the backflow from the river main stream side. closes automatically, eliminating the need for manual closing operation and ensuring safety.
(2) If the gate device of the present invention is installed over an existing gate, it can be automatically opened and closed even if the existing operating device fails and the closing operation becomes impossible.
(3) By installing a unit type in which the flap gate is incorporated in advance in the support housing, it is not necessary to remove the existing pillars and gates, even if the existing pillars and slide gates are left in place. It is economical because it requires only minor renovations.

1 is a perspective view showing an embodiment of a unit type flap gate according to the present invention; FIG. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a partially cutaway perspective view schematically showing a state in which a unit type flap gate according to the present invention is installed in an existing sluice gate of an embankment; FIG. 2 is a side cross-sectional view schematically showing a state in which the unit-type flap gate of FIG. 1 is installed in an existing sluice gate; 1(a) is a front cross-sectional view and (b) is a rear cross-sectional view showing a state in which a unit type flap gate according to the present invention is installed in an existing sluice gate of an embankment. FIG. (a) is a partially cutaway front view showing the assembly structure of the balance weight, (b) is a plan view of the second weight, (c) is a plan view of the first weight, and (d) is a partially cutaway view. It is a side view. (a) showing a watertight rubber ring is a front view, (b) is a side view, and (c) is an enlarged cross-sectional view of a main part. (a) is an enlarged plan view of a main part, (b) is a side cross-sectional view of (a), and (c) is a perspective view of a main part, showing another embodiment of a watertight rubber ring. (a) is a side view showing the main structure of the flap, and (b) is a side cross-sectional view. Fig. 2 is a side cross-sectional view of the float; FIG. 4A is an enlarged cross-sectional view of a main part showing a temporarily fixed state and FIG. (a) is an explanatory diagram showing the operating state of the gate when the water level is low or when the water level is low, and (b) is when the water level is normal. FIG. 10 is an explanatory diagram showing the operating state of the gate at the time of the planned marginal high water level; (a) is an explanatory diagram showing the operating state of the gate when the internal and external water levels begin to rise simultaneously due to a flood, and (b) is when the river main stream side is flooded and the river branch side inlet is full of water.

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below based on embodiments shown in the drawings.

[Overview of Unit Type Flap Gate Installation]
As shown in FIGS. 1 to 4, it consists of a hinged gate having a flap 1 which is supported in a support housing (socket) 2 with an occupation height Hd from the bottom plate to the support shaft 12a. The unit type flap gate UG is inserted and moved from the outflow port 19A of the river main stream side RM where the existing gate 21 of the existing sluice gate 20 is open, temporarily fixed at a predetermined position, and the inner surface of the sluice gate box 18 and the unit. A predetermined gap between the flap gate UG and the outer surface of the support housing 2 is filled with a non-shrinkable mortar 26 or the like as a filling material, and then finally fixed.

The existing gateposts 22 and existing gates 21 do not need to be removed as long as they do not interfere with the installation work of the unit type flap gate UG. However, here, an example in which the existing sluice gate 20 is installed in the constructed sluice gate box 18 will be described.

As shown in FIG. 2, in order to drain the water inside the embankment 25, the water flows through the inside of the existing sluice gate 20 buried in the embankment 25 and is discharged to the river main stream side RM. During heavy rain floods, the inside of the sluice gate box 18 of the existing sluice gate 20 often flows out at a full water level. The water channel width of the beating part 24 is widened, the amount of water from the outflow port 19A is diffused, and the water level near the outflow port 19A of the sluice gate box 18 is lowered. The unit type flap gate UG is installed at a suitable position in order to obtain the desired effect in the section L where the water level of the outflow port 19A is lowered from the water level of this planned flood condition. Further, when the flap 1 is pressed by backflow water from the river main stream side RM, a flap locking body 17 is provided on the lower inner wall surface of the support housing (socket) 2 so that the closed flap 1 can dam the flowing water.

[Composition of unit type flap gate]
The support housing (socket) 2 of the unit type flap gate UG according to this embodiment has a substantially trapezoidal box shape in which doorstops 2b with different depth lengths are integrally formed at the upper and lower edges. It has a pair of housing side plates 2a projecting to the RM, and all four inner surfaces of the box portion also serve as doorstops 2b of the flap 1. - 特許庁Also, the balance weight BW according to the present embodiment comprises at least a first weight 6 and a second weight 7. The second weight 7 suspends the first weight 6 so that it is always in a free hanging state. are connected. Each weight is provided with adjusting weights 8 or 11 that can be fitted to both ends of the weight so that the weight can be adjusted.

In this manner, the flap 1 is attached to the support housing (socket) 2 so as to be capable of pendulum movement around the support shaft 12a provided at the top. In other words, a balance weight BW having a plurality of weights 6 and 7 having a weight and a positioning function capable of balancing with the buoyancy of the float material 14 attached to the flap 1, the weight of the stringer (main structure) 3a, and the weight of the watertight rubber ring 16 is provided. installed. The second weight 7 suspends the first weight 6 so that it is always in a free hanging state, and is fixed on the skin plate 15 adhered to the surface of the flap 1 to hold the first weight 6. It has a holding arm 10 that holds a suspension connecting member 9 .

A bearing plate 13 having an occupation height Hd for supporting the flap 1 is attached to the upper portion of the housing side plate 2a, and a flap locking body for receiving the closed flap 1 is attached to the lower inner wall of the supporting housing 2. 17 is installed. As a result, the flap 1 is suspended by the support shaft 12a fitted in the bearing 12, flows backward from the river mainstream side RM into the outflow port 19A, and the flap 1 is pushed by the water pressure and received by the flap locking member 17. to dam backflow water. Further, the watertight rubber ring 16 attached to the flap 1 maintains watertightness by contacting the ends of the rubber sides pressed by the backflow water with the doorstops 2b on the upper, lower, left, and right sides forming the box portion. ing. As will be described later, when the four corners of the watertight rubber ring 16 are designed to be arc-shaped, the corners of the box portion of the support housing 2 are also arc-shaped corresponding to the corners of the watertight rubber ring 16 .

That is, in the unit type flap gate UG of this embodiment, the housing inner wall of the support housing 2 is also used as the door stop 2b, and the outflow port 19A, which is supported by the bearing plate 13 on the upper side of the pair of housing side plates 2a, opens and closes. It constitutes a hinged gate with a flap 1 .

[Flap mounting structure]
The door body 3 of the flap 1 is a curved structure that has a substantially inverted V shape when viewed from the side, and its configuration is, as shown in FIGS. A skin plate 4 is affixed to the front surface (main stream side RM) of the horizontal girder 3b, and a bearing 12 in which a support shaft 12a is fitted above the skin plate 4, and a second weight. A holding arm 10 for holding 7 is joined to which a plurality of adjusting weights 11 can be connected. The second weight 7 suspends the first weight 6 by a suspension connection member 9 so as to always be in a freely hanging state and to adjust the weight. is enabled to connect.
In this example, the first weight 6 hangs down freely, but in order to balance the balance weight BW and the door 3, the hanging connection member 9 is fixed to maintain the hanging state. Anything is fine. Further, although the cross section of the first weight 6 is circular, it may be circular or polygonal with a part cut away to adjust the weight.

In addition, the flap 1 incorporates float members 14 of various sizes, which are floating bodies, on its front surface (on the river main stream side RM) and on its rear surface side. (including the float material 14 and the watertight rubber ring 16) are arranged so as to be balanced by their own weight. A dogleg-shaped door body 3 is suspended by a bearing 12. - 特許庁

As shown in FIG. 9, a float member 14 is incorporated between the surface of the skin plate 4 and between the vertical beams 3a and the horizontal beams 3b of the door body 3. The float member 14 on the skin plate 4 side is Float members 14 of various sizes are fitted to the vertical beams 3a and horizontal beams 3b, and some of the float members 14 protrude from the structure. protected and protected. Its shape and volume are arbitrary, and can be changed according to the condition of the inner dimensions of the gate box 18, so that the buoyancy can be arbitrarily adjusted. Furthermore, replacement of the float member 14 due to aging deterioration can be easily performed.

A watertight rubber ring 16 is affixed to the rear surface of the gate 3 (Teinai River inlet RS), and as shown in FIG. The angle of the side where the rubber ring 16 abuts against the doorstop 2b is expanded toward the river main stream side RM, and the flap 1 is received by the flap locking body 17 due to the water pressure, and the expanded side is also pressed. The watertightness is maintained by abutting against the door stop. That is, the watertight rubber ring 16 is formed in a rectangular ring shape following the outer periphery of the flap 1, and has an obtuse angle so as to expand in diameter toward the outflow port 19A on the river mainstream side RM of the existing sluice gate 20 in a side sectional view. It is formed integrally by being bent into a shape, and has a door stop side that abuts against the inner wall surface of the support housing (socket) 2 .

Although the four corners of the watertight rubber ring 16 are formed with adjacent sides forming angular shapes, the corners may be formed in an arcuate shape with smooth corners as shown in FIG. In addition, since the straight portion and the corner portions of the four corners of the watertight rubber ring 16 have different amounts of deflection when pressed by water pressure, the hardness of the CR rubber is in the range of 45 to 65, and the corner vertices of the four corners By adjusting the bending amount by changing the thickness t1 to t2, the watertight rubber ring 16 pressed by the water pressure is brought into close contact with the doorstop 2b and watertightness is maintained.

[How to install a unit type flap gate]
When the inside of the sluice gate box 18 is in a drought state, it is inserted from the outflow port 19A of the RM on the main stream side of the river, and installed and fixed at a position where the range of the margin height h1 to h2 of the running water level is determined. At that time, the fitted and inserted unit type flap gate UG is moved to an arbitrary position by human power or pulling equipment (not shown), and is installed and fixed.

After installation, as shown in FIG. 10, anchor holes 27a are bored in the wall surface 18 of the sluice gate box 18 before installing the unit type flap gate UG. The planned clearance d is held between the inner wall of the sluice gate box 18 and the outer wall of the support housing 2 by the temporary fixing and adjustment bolts 28 attached to the wall of the support housing 2, and then the shaft attached to the doorstop 2b. Anchor bolts 27 are inserted through the bearing plate 13 and the support housing 2 and tightened for final fixation, and non-shrinkage mortar 26 is filled in the gap between the inner surface of the sluice gate box 18 and the outside of the support housing 2. Final fix.

After the non-shrinkage mortar 26 has solidified, the temporary fixation and adjustment bolt 28 is removed. At the four corners of the inner space of the existing sluice gate box 18, there are many corner cuts called haunches. In such a cross-sectional structure, the haunches (four per room) were removed in advance so that the unit-type flap gate UG could be inserted or moved, and were removed after the unit-type flap gate UG had been installed. Protect the haunch face by known means.

Regarding the material of each member of the unit type flap gate UG, it is preferable to use stainless steel for the steel part, CR rubber for the watertight rubber ring 16, and expanded polystyrene for the float material 14, but the float protection covers 5 and 15 and the float The material 14 is not limited to this.

[Explanation of the operation of the flap gate according to the water level]
The operation of the flap gate of this embodiment will be described below with reference to FIGS. 11 and 12. FIG.

FIG. 11(a) shows operation in a low water condition or drought condition.
The flap 1 incorporated inside the box of the support housing 2 is arranged around a support shaft 12a fitted in the bearing 12 to control the weight of the door body 3 (including the float material 14 and the watertight rubber ring 16) and the first opening. Balance is maintained by the weights of the weight 6 and the second weight 7, and an angle α called the desired opening is formed between the lower side of the flap gate 1 and the side on the vertical line. , the first weight 6 suspended and connected to the second weight 7 remains in a free hanging state. A small amount of water in this state flows out from the gap between the watertight rubber ring 16 adhered and fixed to the support housing 2 and the door member 3 .

FIG. 11(b) shows the operation at normal water level (running water state where the water level changes). First, the flap 1 incorporated inside the box of the support housing 2 is pushed by the buoyancy of the float material 14 attached to the flap 1 and the running water when the water level of the river tributary side RS rises and flows into the inlet 19B. It rises while rotating in an arc about the support shaft 12a. At that time, the first weight 6 suspended and connected to the second weight 7 maintains a free hanging state. Furthermore, the back surface of the flap 1 floats along the flowing water surface within the range of the planned water surface change section L.

FIG. 12 shows a flowing water state in which the design clearance height h2 is displaced to h1. In this case, the flap 1 floats along the surface of the flowing water within the range of change of the head difference h=(H2-H1) of the water level. That is, when the water level rises and reaches the water level of the design clearance height h2, the state of the flap 1 becomes a substantially horizontal state and drifts in the design water surface change section L. The buoyancy by the float material 14 attached to the door 1 is reduced, the weight of each weight 6 and 7 and the weight of the door 3 are added, and the door 3 descends while rotating around the support shaft 12a, as shown in FIG. 11(a). The low water level or drought condition shown will automatically return and the first weight 6 will also return to its free hanging condition.

When the inside and outside water levels begin to rise at the same time during a flood, the door 3 automatically closes due to the buoyancy acting on the float of the door 3 (see FIG. 13(a)).

In FIG. 13(b), the river main stream side RM is in a flood water level state, the water flows backward from the outflow port 19A, the water level in the bank reaches the height of the inflow port 19B, and the sluice gate box 18 becomes full. state. That is, when water flows backward from the outflow port 19A, the flap 1 pressed by the water pressure is received by the flap engaging member 17. As shown in FIG. Further, as the water level rises, water pressure is applied to the four sides of the substantially V-shaped watertight rubber ring 16 attached and fixed to the back surface of the door body 3, and as the water level rises, the tip of the watertight rubber ring 16 presses against the door stop 2b. Further, when the water level continues to rise and exceeds the upper side of the outflow port 19A of the river main stream side RM, the water pressure is also applied to the upper side of the watertight rubber ring 16, and the box-shaped door contact surface 2b has four sides. All of the tip portions of the are in contact with each other to improve watertightness.

In addition, when the running water on the inner side of the bank flows into the sluice gate box 18 and fills it with water, the flood water level on the river main stream side RM and the drainage water level on the inner side of the bank RS are the water depth (height) H1 based on the bottom slab surface of the box. is superior to H2, and the hydraulic load applied to the flap 1 in the sluice box 18 is also superior, so the opening operation is not performed. That is, when the outside water pressure exceeds the inside water pressure during a flood, the door automatically closes.

After that, when the water level on the river main stream side RM decreases, the load due to the backflow water pressure is removed, the water level at the inflow port 19B also decreases, the load due to the water pressure is removed, and the flap 1 is released from the flap locking member 17. 13(a)→FIG. 13(b)→FIG. 12→FIG. 11(a). .

It should be noted that the above embodiment is merely an example of a preferred embodiment, and the present invention is not limited to this, and can be variously modified without departing from the gist of the present invention. For example, in the present embodiment, the hinged gate having the flap 1 is installed in the supporting housing (socket) 2 in advance and installed in an integrated state, but these are separated and transported to the site. First, the support housing (socket) 2 may be fitted into the trough box 18 and then the flap 1 may be incorporated.

1 Flap 2 Supporting housing 2a Housing side plate 2b Door contact surface 3 Door body 3a Stringer (main structure)
3b Cross beam 4 Skin plate 5 Float retention cover (rear)
6 First weight 7 Second weight 8 Adjustment weight 9 Suspension connecting member 10 Holding arm 11 Adjustment weight 12 Bearing 12a Spindle shaft 13 Bearing plate 14 Float member 15 Float holding cover (front)
16 Watertight rubber ring 16a holding plate 17 Flap locking body 18 Sluice gate box 19A Outflow port 19B Inflow port 20 Existing sluice gate 21 Existing gate 22 Gate post 23 Operation table 24 Water tap 25 Embankment 26 Non-shrinkable mortar 27 Anchor bolt 27a anchor Hole 28 Temporary fixing and adjustment bolt UG Unit type flap gate BW Balance weight RM River main stream side RS Branch river side d Planned clearance Hd Occupancy height h = (H2-H1) change in water head difference

Claims (6)

A support housing (socket) formed so as to be fitted between an existing sluice gate outlet on the river main stream side and a river branch side inlet, and a support housing (socket) that has an occupation height and is bearing-supported in the support housing. and a hinged gate having a flap for opening and closing said outlet. A flap locking member is provided at the lower part of the inner wall surface of the support housing (socket) that can dam the water flow by the closed flap when the flap is pressed by backflow water from the main stream side of the river. 1. The unitary flap gate according to claim 1. Claim 1 or Claim 2, wherein the flap is formed to be bent in a substantially inverted V shape in a side cross-sectional view, and is attached so as to be capable of pendulum movement around a support shaft provided in the upper part of the support housing (socket). Item 3. The unit type flap gate according to item 2. 3. A balance weight, which requires a plurality of weights having a weight and positioning function capable of balancing the buoyancy of the float attached to the flap, is attached to the side of the flap on the main stream of the river. The unit type flap gate described in . A plurality of weights comprises at least a first weight and a second weight, the second weight suspending the first weight so as to always be in a free hanging state, and a surface of the flap. 5. A unitary flap gate according to claim 4, further comprising a retaining arm fixed on the affixed skin plate and retaining the suspension member of said first weight. It is formed in a rectangular annular shape following the outer periphery of the flap, and is integrally formed by bending at an obtuse angle so as to expand in diameter toward the outlet of the existing sluice gate on the main stream side of the river in a side cross-sectional view, and , a watertight rubber ring having a door stop piece that abuts on the inner wall surface of the support housing (socket) is disposed, the watertight rubber ring has a rubber hardness in the range of 45 to 65, and has corner vertices at its four corners. 6. The unit type flap gate according to claim 1, wherein the amount of deflection is adjusted by changing the thickness of each portion.

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