JPH11269857A - Float type flap gate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To automatically open and close a float type flap gate with excellent cutoff property according to the rising and falling of the water level, and to install it at a low cost without spoiling landscape and environment. SOLUTION: A float type flap gate is equipped with a flap member 11 provided to the upper side of an outlet of a drainage gutter pipe 72 crossing a levee in a rotatable manner. It is also equipped with a weight 12a provided to the flap member 11 and rotating the flap member in an opening direction with gravity and a weight/float 12 of a float 12b rotating the flap member 11 in a closing direction by getting over the weight 12a with buoyancy in the case the water level in a river is in excess of a specific height.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flap gate for preventing backflow of a drain gutter pipe crossing a river bank.
In particular, the present invention relates to a float-type flap gate that uses a float to open and close a flap without power.

[0002]

2. Description of the Related Art Conventionally, a drainage gutter pipe crossing a river embankment has been used to prevent a backflow of a (1) vertical opening type gate or (2).
A flap gate is used.

FIG. 5 is a diagram showing an example of a conventional vertical opening / closing gate. The vertical opening / closing type gate 50 is a bank 71
A gate 51 for opening and closing a river-side outlet 72a of a gutter pipe 72 crossing the gate 51;
Pillar 5 that guides the door up and down by a guide groove 52a
2, an operation room 53 provided above the gate post 52, and a hoisting machine 5 provided in the operation room 53 and winding up the gate 51.
4 and a management bridge 55 and the like, which extends over the operation room 53 and the top of the embankment 71, and has a gate / handrail 55a and the like.

FIG. 6 shows an example of a conventional flap gate. The flap gate 60 is connected to the outlet 7 of the gutter tube 72.
A flap member 61 is rotatably supported by a hinge 63 on the upper side of 2a. This flap gate 60
The gutter pipe 7 is always operated by the weight of the flap member 61.
The second outlet 72a is closed to prevent backflow when the water level of the river rises. Also, when the flap member 51 flows out of the gutter pipe 72 into the river, the flap member 51 rotates clockwise in FIG. 6 with the upper hinge 63 as a fulcrum due to the outflow pressure.

[0005]

However, in the former vertical opening / closing type gate 50, a hoisting machine 54 is installed in an operation room 53 above the gate 51 even if the gate is small. Thus, the gate 51 is opened and closed. For this reason, a passage (management bridge 55) for communication with the gate post 52 and the embankment 71 was required.

The gate post 52, the operation room 53 and the management bridge 55
In such a case, there is a risk that the appearance of the river may impair the landscape of the river and the pillar 52 may impede the flow of the river. In addition, since these facilities are vulnerable to earthquakes and the like, they require maintenance and management, and the construction and operation of these facilities are expensive. In addition, the local manager manages the operation of the gate. When the river water level rises during floods, etc., the administrator decides to close the gate,
When the water level dropped, the gates were opening, and the burden and responsibility on the manager were great.

On the other hand, the latter flap gate 60, due to its structure, has a flap member 61,
Dust and the like easily accumulate between the gutter pipe outlet 72a. Therefore, it was not used in important places because the water blocking property was inferior to that of the vertical opening / closing type gate.

It is an object of the present invention to provide a flap gate which opens and closes automatically when the water level rises and falls, has good water stoppage, and can be installed at low cost without damaging the scenery and environment. .

[0009]

In order to solve the above-mentioned problems, the present invention is directed to a flap member rotatably provided on an upper side of an outlet of a drain gutter pipe crossing an embankment; A weight member that rotates the flap member in the opening direction by gravity, and a weight member that is provided on the flap member and overcomes the weight member by buoyancy when the water level of the river exceeds a predetermined height. , A float member for rotating the flap member in a closing direction.

According to a second aspect of the present invention, there is provided the float type flap gate according to the first aspect, further comprising a weight / float member integrating the weight member and the float member. is there.

According to a third aspect of the present invention, in the float type flap gate according to the second aspect, the weight / float member is provided on a side of the weight member farther from the rotation axis than the float member. This is a float type flap gate.

According to a fourth aspect of the present invention, in the float type flap gate according to the second aspect, the weight / float member is connected to the flap member and arranged on the opposite side of the rotation axis. This is a float type flap gate.

According to a fifth aspect of the present invention, in the float type flap gate according to the second aspect, the weight / float member is connected to the flap member and arranged on the same side as the rotation axis thereof. This is a float type flap gate.

According to a sixth aspect of the present invention, in the float type flap gate according to the fifth aspect, a link mechanism for connecting the weight / float member to the flap member is further provided, and the link mechanism connects the flap member to a predetermined position. The flap member is rotated in the closing direction by the lifting of the weight / float member, and is rotated in the opening direction by the hydraulic power from the outlet of the drain gutter pipe, while being held at the angle opened position. It is a float type flap gate.

According to a seventh aspect of the present invention, in the float type flap gate according to the second aspect, the weight / float member is connected to the flap member, and
A float type flap gate comprising a movement direction conversion mechanism for converting a vertical movement of the float member into an opening / closing movement of the flap member.

According to an eighth aspect of the present invention, in the float type flap gate according to the seventh aspect, the movement direction changing mechanism includes a winding mechanism provided above a river side of the flap member, and the weight / float member. One end is connected to
A float-type flap gate, the other end of which is connected below the flap member, and a string-shaped member wound around the winding mechanism.

[0017]

Embodiments of the present invention will be described below in further detail with reference to the drawings. (First Embodiment) FIG. 1 is a view showing a first embodiment of a float type flap gate according to the present invention. The float type flap gate 10 of the first embodiment is a one hinge integrated type, and includes a flap member 11 for opening and closing an outlet 72a of a gutter tube 72, and a weight / float member 12 formed integrally with the flap member 11. And a hinge 13 provided at an intermediate portion thereof and rotatably supporting the flap member 11 with the fulcrum as a fulcrum, and operates without power.

The weight / float member 12 has a counterweight 12a for generating a moment for rotating the flap member 11 clockwise in FIG. 1 by gravity, and a flap member 11 for buoyancy when the water level reaches HHWL. 12b for rotating the counterclockwise direction of FIG.
Are integrally formed. Therefore, it is preferable that the counterweight 12 a is sufficiently heavy and is disposed far from the hinge 13. The float 12b preferably has a large hollow portion (volume) so that sufficient buoyancy is exerted.

In the float type flap gate 10, the counterweight 12a attached to the float 12b always (at the water level NWL) causes the flap member 11 to move around the hinge 13 by the action of gravity. The outlet 72a of the gutter tube 72 is open because it is rotated clockwise.

Further, the water level of the river rises and the gate 10
Is submerged (water level HHWL), the float 12b
Buoyancy overcomes the gravity of the counterweight 12a,
Since the flap member 11 is rotated counterclockwise in FIG. 1, the outlet 72a of the gutter tube 72 is closed.

According to the first embodiment, when the water level of the river drops (always), dust or the like may be clogged as in the conventional flap gate 60 in order to keep the gate open. Absent. Therefore, there is the same degree of reliability of water stoppage as the vertical opening / closing type gate 50. In addition, since the opening and closing of the gate 10 are linked by the water level of the river, the burden and responsibility of the local manager are greatly reduced. In particular, the first embodiment has an advantage that the structure is simple, so that the reliability is high and the installation cost is easy.

(Second Embodiment) FIG. 2 is a view showing a float type flap gate according to a second embodiment of the present invention. In each of the embodiments described below, portions that perform the same functions as in the first embodiment are denoted by the same reference numerals at the end, and redundant description will be omitted as appropriate. The float type flap gate 20 of the second embodiment is a two-hinged type, and the flap member 21, the float (with a counterweight) 22, and the flap member 21 are rotatably mounted on the upper side of the outlet 72a of the gutter tube 72. A hinge (flap fulcrum) 23 for supporting, an arm member 24 provided with a float 22 at the tip, a hinge (float fulcrum) 25 for rotatably supporting the lower end of the arm member 24 at an outlet 72a, Long groove 21a and long hole 24 of arm member 24
a to form a sliding link mechanism
And the like.

At any time (water level NWL), the arm member 24 of the float type flap gate 20 will rotate counterclockwise in FIG. 2 around the hinge 25 due to the gravity of the counterweight attached to the float 22. And At this time, the pin 26 is engaged with the lower end of the long hole 24a of the arm member 24 and the lower end of the long groove 21a of the flap member 21, and the position shown in FIG. 2B (θ = about 30 ° angle) so,
The state where the flap member 21 is pushed and the outlet 72a is opened is maintained.

When submerged (water level HHWL), float 2
2 rises due to buoyancy, and the arm member 24 rotates clockwise in FIG. At this time, the arm member 24 pushes down the flap member 21 via the slide type link mechanism and rotates counterclockwise in FIG. 2 around the hinge 23, so that the outlet 72a is closed.

When a large amount of water flows out of the gutter tube 72 (water level HWL), the flap member 21
And the outlet 72a is fully opened. This behavior is
The principle is the same as that of the conventional flap gate 60.

According to the second embodiment, since the opening of the flap member 21 at all times is about 30 °, there is an advantage that the counterweight can be lighter than in the first embodiment. Also, the upper side near the outlet of the gutter tube 72 (A in FIG. 2)
No), there is no weight, so there is no need to excavate the embankment in this part, so the installation cost is reduced.

(Third Embodiment) FIG. 3 is a view showing a float type flap gate according to a third embodiment of the present invention. The float type flap gate 30 according to the third embodiment includes:
A type in which a float 32 is mounted on the flap member 31 itself (float type with flap), and the flap member 3
1, a float (with a counterweight) 32, a hinge (flap fulcrum) 33 for rotatably supporting the flap member 31 on the upper side of the outlet 72a of the gutter tube 72, and a float 3
An arm member 34 provided at the distal end;
A rotating shaft (floating fulcrum) 35 for rotatably supporting the intermediate portion of the flap member 4 on the side surface of the flap member 31;
A roller 37 is provided at the lower end of the flap member 31 and rolls on the edge 72b of the outlet 72a. A stopper 38 is provided on the side surface of the flap member 31 and stops the arm member 34 at the position shown in FIG.

The float type flap gate 30 always rotates (counterclockwise in FIG. 3) around the rotation shaft 35 by the gravity of the counterweight attached to the float 32 (water level NWL). And stopper 38
Stop at the position where it abuts. At this time, the roller 37 on the opposite side pushes the edge 72b of the gutter tube outlet 72a to keep the flap member 31 open at θ = about 30 °.

When submerged (water level HHWL), float 3
2 rises due to the buoyancy, and the arm member 34 rotates clockwise in FIG. At this time, the roller 37 on the opposite side is separated from the edge 72b of the gutter pipe outlet 72a,
The flap member 31 closes the outlet 72a.

When a large amount of water flows out from the gutter tube 72 (water level HWL), the flap member 31
And the outlet 72a is fully opened. This is similar to the principle of the conventional flap gate 60.

According to the third embodiment, the mechanism is simpler than in the second embodiment, so that the reliability is higher.

(Fourth Embodiment) FIG. 4 is a view showing a fourth embodiment of a float type flap gate according to the present invention. The float type flap gate 40 according to the fourth embodiment includes:
It is a wire type flap gate, and the flap member 41
A float (attached to a counterweight) 42; a hinge (flap fulcrum) 43 for rotatably supporting the flap member 41 on the upper side of the outlet 72a of the gutter tube 72; , A winding mechanism 48 comprising a through shaft 48a and sheaves 48b, 48c, 48d.
And a wire 49 having one end attached to the side surface of the flap member 41 and the other end wound around the sheaves 48b and 48c.
b, 49c and a wire 49d having one end attached to the float 42 and the other end wound around a sheave 48d.

According to the fourth embodiment, the gravity of the counterweight attached to the float 42 is always used.
The float 42 moves downward, and the wire 49 (49b, 4)
9c and 49d), the flap member 41 rotates counterclockwise in FIG.
= Opened at an opening of about 30 °. When submerged, the float 42 moves upward by buoyancy, so that the wire 49 is slackened, and the flap member 41 rotates clockwise in FIG. 4 around the hinge 43 by its own weight to close the outlet 72a. Further, when the outflow from the gutter tube is large, the outflow pressure causes the flap member 41 to rotate counterclockwise in FIG. 4 around the hinge 43 and open the outlet 72a.

(Modifications) Various modifications and changes are possible without being limited to the above-described embodiments, and these are also within the equivalent scope of the present invention. For example, in the fourth embodiment, the wires 49b and 49c are connected to the through shaft 48a.
May be provided only in the central part of. In addition, the float 42 is provided so as not to dance due to the flow of the river, as shown in FIG.
A guide member (enclosure) or the like may be provided at the position B. A chain or the like may be used instead of the wire.

[0035]

As described above in detail, according to the present invention, the following various effects can be obtained. (1) When the water level of the river is falling (always),
In order to keep the gate open, there is no clogging with dust and the like, as in the case of a conventional flap gate, and the water stopping performance is good. (2) Since the opening and closing of the gates are linked according to the river water level, the burden and responsibility of local managers are greatly reduced.

(3) Since there is no need for facilities such as a gate post, an operation room, and a management bridge, the river landscape is not spoiled without occupying the river space. Also, it does not hinder the flow of the river. (4) Since the structure is simple, it is resistant to earthquakes and the like, and maintenance and installation costs can be reduced.

[Brief description of the drawings]

FIG. 1 shows a first embodiment of a float type flap gate according to the present invention.
It is a figure showing an embodiment.

FIG. 2 shows a second embodiment of the float type flap gate according to the present invention.
It is a figure showing an embodiment.

FIG. 3 shows a third embodiment of the float type flap gate according to the present invention.
It is a figure showing an embodiment.

FIG. 4 shows a fourth embodiment of the float type flap gate according to the present invention.
It is a figure showing an embodiment.

FIG. 5 is a diagram showing an example of a conventional vertical opening / closing gate.

FIG. 6 is a diagram showing an example of a conventional flap gate.

[Explanation of symbols]

 10, 20, 30, 40 Float type flap gate 11, 21, 31, 41 Flap member 12, 22, 32, 42 Float 13, 23, 33 Hinge 24, 34 Arm member 25 Hinge 26 Pin 37 Roller 38 Stopper 48 Winding Mechanism 49 Wire

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Hirohiko Yamada 1-10-21 Nakameguro, Meguro-ku, Tokyo Inside Yachiyo Engineering Co., Ltd. (72) Inventor Seiichi Oyamada 1-10 Nakameguro, Meguro-ku, Tokyo No. 21 Yachiyo Engineering Co., Ltd.

Claims (8)

[Claims] 1. A flap member rotatably provided on an upper side of an outlet of a drain gutter pipe traversing an embankment, and a weight member provided on the flap member and rotating the flap member in an opening direction by gravity. A float member provided on the flap member, wherein when the water level of the river exceeds a predetermined height, the float member overcomes the weight member by buoyancy and rotates the flap member in the closing direction. Flap gate. 2. The float type flap gate according to claim 1, further comprising a weight / float member integrating said weight member and said float member. 3. The float-type flap gate according to claim 2, wherein the weight / float member is provided on a side farther than the float member with respect to a rotation axis of the weight member. Float type flap gate. 4. The float-type flap gate according to claim 2, wherein the weight / float member is connected to the flap member, and is disposed on a side opposite to a rotation axis of the flap member. . 5. The float type flap gate according to claim 2, wherein the weight / float member is connected to the flap member and arranged on the same side as a rotation axis of the flap member. . 6. The float type flap gate according to claim 5, further comprising a link mechanism for connecting the weight / float member to the flap member, wherein the link mechanism opens the flap member by a predetermined angle. A float type flap gate characterized by rotating the flap member in a closing direction by raising the weight / float member, and rotating in an opening direction by hydraulic force from an outlet of the drain gutter pipe. 7. The float type flap gate according to claim 2, wherein the weight / float member is connected to the flap member, and a vertical motion of the weight / float member is converted into an opening / closing motion of the flap member. A float type flap gate comprising a direction changing mechanism. 8. The float type flap gate according to claim 7, wherein the movement direction changing mechanism has one end connected to a winding mechanism provided above a river side of the flap member, and one end connected to the weight / float member. A float-type flap gate, the other end of which is connected below the flap member, and a string-shaped member wound around the winding mechanism.