JP2004204601A - Flap gate set inside of water collecting pit and its installation method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a flap gate with high safety without being required for a person to enter an ocean area or a river course in the case of installation and maintenance of the flap gate. <P>SOLUTION: The flap gate is equipped with a frame connected to an opening and closing machine and slidable in the vertical direction along a guide and a door body for opening and closing an opening section formed in the frame by oscillating the upper end pivoted on the frame. The guide is extended from a drain outlet formed in a water collecting pit to the above of the water collecting pit to cover the edge section of the drain outlet when the frame reaches the drain outlet by sliding it, and the water collecting pit inside setting type flap gate constituted by circulating or cutting off a current flowing into the drain outlet is installed in an installation hole excavated in a drain on the upstream side from a levee together with the water collecting pit by opening and closing the opening section formed in the frame by oscillating the door body. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention is installed in a drainage channel formed by a gutter pipe or the like laid to drain water into a river or the sea, and prevents water from flowing back from the river or the sea to the drainage channel during drainage. The present invention relates to a flap gate installed in a catchment basin and a method of installing the flap gate.
[0002]
[Prior art]
2. Description of the Related Art A flap gate has been often used as a gate for preventing water from flowing backward from a river or the sea to a drainage channel. The flap gate is a gate whose door swings around a horizontal support shaft.When draining water from the water channel side, the door swings by opening the gate in response to the flow of water and the river When the water surface such as the sea or the sea rises and water tries to flow backward to the waterway side, the door body swings so as to close the gate in response to the flow of the water.
[0003]
On the other hand, a slide gate is well known as a gate installed in a water channel such as a gutter pipe laid for draining water into a river or the sea. A slide gate is a gate that allows water to flow and shut off at a desired timing by raising and lowering a door body along a valve seat using a switchgear. The structure described in the above item is known.
[Patent Document 1]
JP 2001-32248 A
The flap gate disclosed in Japanese Patent Application Laid-Open No. 2001-32248 is a gate capable of restricting swing of a flap portion by using a slide of a door body and bringing the gate into a fully closed state at a desired timing. This is a flap gate that also has the function of a slide gate.
[0005]
[Problems to be solved by the invention]
However, a conventional flap gate is generally installed at the tip of a drainage channel, for example, as shown in FIG. 6, and the tip of the drainage channel is usually installed on the sea side or river side downstream of the embankment. Have been.
Therefore, when maintaining the conventional flap gate (removal of trash, shells, etc.), it is necessary for people to enter the sea area or the river channel. However, in recent years, from the viewpoint of disaster prevention, Gates that require access to waters over embankments are becoming increasingly difficult to manage. In particular, recently, there is a problem such as aging of managers, and the above problem is becoming more serious.
In addition, when a wave-dissipating block or the like is arranged immediately in front of a gate installed in a sea area, a serious problem occurs that a person cannot enter the sea area and cannot perform management. If the maintenance of the flap gate is inadequate, it is not possible to expect a reliable water stop at the flap gate, and water will flow backward from the river, etc. to the drainage channel, or the water will not be able to drain smoothly from the drainage channel. There is a risk of damage such as flooding.
[0006]
In addition, conventional flap gates require careful adjustment of the valve seat and door at the site during installation.However, when installing the flap gate, it is necessary for people to enter the sea area or river channel, Dangerous and inefficient.
[0007]
Furthermore, the conventional flap gate requires one flap gate for each drainage channel, so the number of installations cannot be reduced.However, from the viewpoint of easy maintenance, environmental protection, and installation costs, etc. In recent years, it has been desired to reduce the number of installation locations of flap gates as much as possible.
[0008]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, a water collecting basin installed type flap gate according to the present invention is:
(1) A frame which is connected to a switch and is slidable in the vertical direction along a guide, and a door body which is pivotally supported at the upper end thereof and swings to open and close an opening formed in the frame. In the flap gate, the guide is configured to extend from a drain port formed in the water collecting basin to above the water collecting basin, and to cover an edge of the drain port when the frame slides to reach the drain port. The door body is configured to open or close an opening formed in the frame by swinging, so as to flow or block a water flow flowing to the drain port.
[0009]
(2) In the flap gate provided in the water collecting basin according to the above (1), a stopper that freely protrudes toward the frame side is disposed on the door body, and the stopper comes into contact with the frame when the stopper protrudes toward the frame side. To lock the door.
[0010]
(3) In the flap gate provided in the water collecting basin according to the above (1), the water collecting basin is provided with one to three water intake ports.
[0011]
The installation method of the water collecting basin type flap gate according to the present invention,
(4) A drainage basin for digging a drainage basin installation hole in the drainage channel upstream of the embankment, and installing the drainage basin and the drainage basin internal flap gate in the drilled installation hole. An installation method of an internal flap gate, wherein the water collecting basin internal flap gate is connected to a switch and slidably movable vertically along a guide, and an upper end is pivotally supported by the frame. A door body that opens and closes an opening formed in the frame by swinging, and the guide slides by extending the guide from a drain port formed in the water collecting basin to above the water collecting basin. When reaching the drain, the edge of the drain is covered, and the door swings to open and close the opening formed in the frame, so that the water flow flowing to the drain is circulated or blocked. .
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an example of an embodiment of the present invention will be described in detail with reference to the drawings.
1 to 5 relate to an embodiment of the present invention, and FIG. 1 is a cross-sectional view of a main part conceptually illustrating a flap gate provided inside a water collecting basin. FIG. 2 is a diagram of the flap gate installed inside the catchment basin as viewed from the upstream side. FIG. 3 is a conceptual diagram for explaining the structure and behavior of the door of the flap gate in the water collecting basin. FIG. 4 is a layout diagram conceptually illustrating an image when a water collecting basin type flap gate is installed in a drainage channel. FIG. 5 is a diagram conceptually illustrating a catchment basin in which a plurality of intake ports are arranged.
FIG. 6 is a layout diagram conceptually illustrating an image when a conventional flap gate is installed in a drainage channel.
[0013]
As shown in FIG. 2, the water collecting basin type flap gate 10 (also referred to as a flap gate 10) according to the present embodiment has an opening formed by an end girder 26, a horizontal girder 28, and the like. A rectangular frame 20 and a door 22 are provided. In the present embodiment, the door body 22 is formed by a stainless steel skin plate 23, and the upper end thereof is supported by a part of the cross beam 28 by a support shaft (not shown). Then, as shown in FIG. 3, the door body 22 swings from a state of being substantially vertically hung down to a downstream region and swings, and the edge of the opening formed in the frame 20 in the upstream region. It is configured to abut against.
[0014]
The door body 22 has a structure in which a watertight rubber 42 is disposed as a packing on an outer peripheral edge thereof, and the door body 22 swings to contact an edge of an opening formed in the frame 20 on the upstream side. When contacted, the door body 22 covers the opening, closes the opening, and can shut off the flow of water.
In this embodiment, a stopper 24 that can freely protrude toward the frame side is provided upstream of the door body 22. When the stopper 24 protrudes toward the frame side, the stopper 24 Are in contact with the frame so that the door body 22 and the frame 20 can be locked.
[0015]
Further, as shown in FIG. 2, a switch 56 is disposed above the frame 20, and the frame 20 and the switch 56 are connected via a connector. By rotating the handle of the opening / closing device 56, the spindle 52, which is a connector, moves vertically and rearward, so that the frame 20 connected to the spindle 52 slides vertically along the side door stop 54, which is a guide. . The opening and closing of the switch 56 can be performed not only manually but also electrically.
[0016]
In the present embodiment, the hinge 35 is provided between the spindle 52 and the frame 20 as shown in FIG. On the side surface, trapezoidal wedges 32A and 33A are arranged.
In the vicinity of the lower end of the side door stop 54, wedges 32B and 33B that are in contact with the trapezoidal wedges 32A and 33A disposed on the frame 20 are arranged. When the wedges reach the position, the wedges come into contact with each other and strongly push the entire frame 20 toward the downstream side.
Since watertight rubbers 41, 49, etc. are provided as packing in the vicinity of the outer peripheral edge of the downstream side surface of the frame 20, the frame 20, which is strongly pressed to the downstream side by the wedge, has an upper door located on the downstream side. The stop 45, the lower door stop 44, and the side door stop 54 are in contact with each other to cover the edge of the drain port 82, and to block the flow of water passing through the contact surface of each door stop and the frame 20. ing.
[0017]
A drain 82 of a catchment basin 80 to be described later is formed in a portion surrounded by the upper door stop 45, the lower door stop 44, and the side door stop 54. Is partially buried in the catchment basin 80 so as not to flow through the upstream side surface of the inside of the drainage port 82. Accordingly, if the frame 20 is set at the lowermost end of the guide so as to cover the drain port 82 and the door 22 is in a state in which the opening of the frame 20 is closed, the water flowing through the water collecting basin 80 and the drain port 82 is shut off. It has a configuration that can be used.
[0018]
Here, the water collecting basin 80 according to the present embodiment is a concrete box-shaped water collecting basin 80 having an intake port 81 and a drain port 82 as shown in FIG. Recesses are formed on the upstream and downstream sides as sediment reservoirs 85 </ b> A and 85 </ b> B, and a top plate 88 is disposed above the water collecting basin 80. The flap gate 10 is provided in the water collecting basin 80, and the side door stop 54 as a guide extends from above the top plate 88 of the water collecting basin 80 to the drain port 82.
[0019]
Further, the above-described switch 56 is disposed above the water collecting basin 80 via a side door stop 54 and a support (not shown). As described above, when the switch 56 is operated to move the frame 20 to the lowermost end of the guide, if the door 22 is in a state where the opening of the frame 20 is closed, The structure is such that the flow of water passing from 80 to the downstream side can be blocked.
[0020]
A method of installing the flap gate 10 configured as described above will be described below.
First, the catch basin 80 is created in the factory in advance. Parts such as the upper door stop 45, the lower door stop 44, and the side door stop 54 that come into contact with the frame 20 of the flap gate 10 are embedded in concrete in advance as needed in the water collecting basin 80. .
[0021]
On the other hand, at the site, not at the tip of the drainage channel, but in the middle of the drainage channel where it enters the upstream side, for example, as shown in FIG. 4, the upstream side inside the embankment (sometimes referred to as inside the embankment) Excavate the installation hole for installation where it entered. Then, a water collecting basin 80 in which parts such as a door stop are embedded in the installation hole is installed so that the positions of the water inlet 81 and the drain outlet 82 are aligned with the drain channel.
Then, the flap gate 10 is mounted in accordance with the components embedded in the water collecting basin 80. The installation work of the flap gate 10 according to the present embodiment does not need to be installed at the tip of the drainage channel as in the related art, and does not need to be performed in a dangerous seaside or riverside area. It has excellent advantages of high efficiency and high safety.
In addition, the position where the water collecting basin 80 is installed is not limited to the position illustrated in FIG. 4, and may be in the middle of the drainage channel located at a position considerably upstream from the embankment.
[0022]
In the above-mentioned work, particularly, the work of aligning the door body 22 with the frame 20 and the work of aligning the frame 20 with the door stop require careful adjustment of the mating surface. It is a tedious task.
In the case of the flap gate 10 according to the present embodiment, the main components of the flap gate 10 can be pre-installed in a factory, or all of them can be completed. The fact that the main parts of the flap gate 10 are pre-installed in the factory or all of them are completed means that the above-mentioned troublesome work is performed in the factory, so that a product with high working efficiency and high accuracy can be expected. Is a preferred embodiment.
[0023]
The operation of the flap gate 10 according to the present embodiment described above will be described. When the flap gate 10 is normally used, the frame 20 is brought into contact with the frame 20 as the lowermost end of the guide by the switch 56 so as to cover the edge of the drain 82 of the water collecting basin 80. In this state, when water is drained from the drainage channel side, the door body 22 swings so as to open the opening of the frame 20 in response to the flow of water, and the water surface of a river, sea, or the like. When the water rises and water tries to flow backward to the drainage channel side, the door body swings so as to close the opening of the frame 20 by receiving the flow of water.
[0024]
If the gate is to be closed urgently due to a typhoon or the like, the switchgear 56 is operated to once raise the frame 20 up to the top plate 88 above the water collecting basin 80, and the stopper 24 is moved to the frame 20 side. By projecting, a part of the stopper 24 is brought into contact with the frame, the door body 22 and the frame 20 are locked, and the door body 22 is fixed so as not to swing.
In this state, when the frame 20 is moved to the lowermost end of the guide, the door 22 and the frame 20 are closed so as to cover the drain port of the water collecting basin.
In this state, even if the door 22 receives the flow of water from the drainage channel side, it cannot swing so that the door body 22 opens the opening of the frame 20, so that the gate does not open.
If it is desired to open the gate urgently for some reason, the switch 56 may be operated to pull the frame 20 up to the top plate 88 above the water collecting basin 80.
[0025]
Next, a maintenance method of the flap gate 10 according to the present embodiment will be briefly described. For example, when dust or the like is trapped between the frame 20 and the door body 22, or when the packing made of watertight rubber disposed on the frame 20 or the door body 22 is deteriorated, the switch 56 is operated to remove the frame 20. It is possible to remove dust and temporarily change the packing in a state where the dust is once pulled up to the top plate above the water collecting basin 80.
Further, if the switch 56 is removed as necessary, the entire flap gate 10 can be easily replaced.
[0026]
When managing the conventional flap gate, it is necessary for a person to enter a dangerous area in a sea area or a river channel. However, according to the present invention, the work is efficient and the safety is high. Further, since the flap gate 10 can be installed on the upstream side of the embankment, there is no need to cross the embankment during maintenance. Therefore, there is no problem even if the embankment becomes high, and even when draining near the sea area where the wave-dissipating block and the like are disposed, there is an excellent advantage that the installation is possible and maintenance is possible.
[0027]
Since the sediment that has entered the catchment basin 80 accumulates in the sediment reservoirs 85A and 85B, it is necessary to periodically remove the sediment. In that case, however, it is only necessary to work inside the catchment basin 80. There is no need for humans to enter sea areas or dangerous areas within river channels.
[0028]
Further, since the water collecting basin 80 according to the present embodiment is box-shaped, it is easy to provide the water intake 81 in three directions, and it is possible to provide one to three places.
Further, since the conventional flap gate requires one flap gate for one water channel, the number of installations cannot be reduced. However, as in the embodiment shown in FIG. If the intake 81 is provided and a plurality of drainage channels are integrated, the number of the flap gates 10 to be installed can be reduced, so that the management becomes easy, and from the aspect of environmental protection and installation cost, etc. Preferably, at least two or more water intake ports 81 are provided, and more preferably, two or three water intake ports 81 are provided.
[0029]
【The invention's effect】
As described above, the water collecting basin built-in type flap gate according to the present invention operates the switchgear so that the frame and the door that greatly affect the water stoppage are pulled up to the top plate above the water collecting basin. Since maintenance can be performed, unlike conventional flap gate maintenance, there is no need for people to enter dangerous areas in the sea area or river channel, and it has an excellent effect that efficient and safe maintenance work can be performed. .
[0030]
When the gate is urgently required to be closed due to a typhoon or the like, the door can be locked to the frame by a stopper and fixed so that the door does not swing.
[0031]
In addition, the conventional flap gate requires one gate for each waterway, so the number of installations cannot be reduced.However, multiple intakes are provided in the catchment basin to consolidate multiple drainage channels. With such a configuration, the number of flap gates to be installed can be reduced, and maintenance and the like can be easily managed.
[0032]
In addition, with the flap gate installation method according to the present invention, it is possible to incorporate flap gate components into the catchment basin in the factory in advance, and as in the conventional flap gate installation method, a person can enter the sea area, Alternatively, there is no need to enter a dangerous area in a river channel, so that there is an excellent effect that efficient and highly safe work can be performed.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a main part conceptually illustrating a structure of a flap gate provided inside a water collecting basin according to the present invention.
FIG. 2 is a view of a flap gate provided inside a water collecting basin according to the present invention as viewed from an upstream side.
FIG. 3 is a conceptual diagram for explaining the structure and behavior of a door of a flap gate provided inside a water collecting basin according to the present invention.
FIG. 4 is a layout diagram conceptually illustrating an image when a water collecting basin type flap gate according to the present invention is installed in a drainage channel.
FIG. 5 is a diagram conceptually illustrating a flap gate provided inside a water collecting basin in which a plurality of water intake ports are arranged in the water collecting basin according to the present invention.
FIG. 6 is a layout diagram conceptually illustrating an image when a conventional flap gate is installed in a drainage channel.
[Explanation of symbols]
Reference Signs List 10 flap gate 20 frame 22 door body 24 stopper 26 end girder 28 side girder 32A wedge 32B wedge 33A wedge 33B wedge 35 hinge 37 connection pin 42 watertight rubber (packing)
41 Watertight rubber (packing)
44 Lower door door 45 Upper door door 52 Spindle 54 Side door door 56 Switch 61 Handle 80 Water catchment basin 81 Water intake 82 Drainage port 85A Soil basin 85B Earth basin 88 Top plate 100 Embankment

Claims (4)

A flap gate including a frame connected to the opening / closing device and freely slidable in a vertical direction along a guide, and a door body that pivotally supports an upper end of the frame and swings to open and close an opening formed in the frame. The guide extends from a drain port formed in the water collecting basin to above the water collecting basin, and covers the edge of the drain port when the frame slides to reach the drain port. A flap gate in a water-collecting basin, in which a body oscillates to open or close an opening formed in the frame to flow or block a water flow flowing to a drain port. The flap according to claim 1, wherein a stopper is provided on the door body so as to freely project toward the frame side, and when the stopper protrudes toward the frame side, the stopper comes into contact with the frame to lock the door body. Gate. The flap gate according to claim 1 or 2, wherein the water collecting basin is provided with one to three water intake ports. A drainage basin is installed in the drainage channel upstream of the embankment, and a drainage basin and a drainage basin installed type flap gate are installed together in the digged installation hole. A method of installing a flap gate, wherein the water collecting basin built-in type flap gate is connected to a switchgear and freely slides vertically along a guide, and the upper end is pivotally supported by the frame and swings. And a door that opens and closes an opening formed in the frame by extending the guide from a drain port formed in the water collecting basin to above the water collecting basin, whereby the frame slides to the drain port. A water collecting basin configured to cover or cut off the flow of water flowing to the drainage port by covering the edge of the drainage port when it reaches and opening and closing the opening formed in the frame by swinging the door body. Installation method of internal flap gate

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