JP2013209879A - Flap gate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flap gate which is hardly affected by hydraulic pressure generated by waves and suitable for installation at an oceanfront such as a beach and a harbor.SOLUTION: A door stop 5 having a sleeve 9 communicating with the water outlet is fixed to a retaining wall by an anchor member 10. A door body 7 is fixed to the door stop 5 with a hinge 6 and abuts against the tip of the sleeve 9 to open and close the water outlet. The tip of the sleeve 9 is inclined upward, and the door body 7 is pressed to the tip of the sleeve 9 by the self-weight. The door body 7 is pushed open by a water flow from the inside, and when the outside water level is raised, the door body 7 is pressed to the tip of the sleeve 9 by hydraulic pressure to close the water outlet to prevent water from flowing backward. The outside surface of the door body 7 is made flat and its outer shape is formed to have a size approximately equal to the outer diameter of the sleeve 9, whereby the door body 7 is hardly affected by hydraulic pressure by waves. Watertight rubber incorporating a backup ring is engaged with a dovetail groove of the door body 7 to seal between the sleeve 9 and the door body 7.

Description

  The present invention relates to a flap gate that is provided at a water outlet to a river, a shore, etc. from a pipe (pipe) such as a fume pipe, and more particularly to a coastal area such as a coast, a harbor, etc. where waves are generated on the water surface. It relates to a flap gate suitable for installation on the ground.

  In general, the flap gate has a structure in which the upper part of the door body that opens and closes the water outlet is supported by a hinge. When the water level outside the water outlet is low, the door body is pushed open by the water flow from the inside, and the outside When the water level of the water becomes high, the door body is pressed against the water outlet by the water pressure to prevent backflow of the water. In this way, when water is discharged from a pipe to a river, coast, etc., it automatically opens and closes depending on the water level difference between the inside and outside of the water outlet, thereby preventing backflow of the water against rising water levels due to increased water, high tides, waves, tsunamis, etc. be able to.

  Conventionally, as a flap gate installed in a coastal area such as a coast or a harbor, a rectangular frame formed by vertical and horizontal girders such as iron, stainless steel, and aluminum alloy as described in Patent Document 1, for example. In many cases, a door using a girder structure in which a plate is welded to the body is used. Such a door structure with a girder structure has high strength against static loads and can be reduced in weight.

JP 2004-285672 A

However, the flap gate provided with the conventional girder-structured door has the following problems.
In coastal areas such as coasts and harbors, waves are constantly generated on the sea surface, and the door body is subjected to repeated loads due to the water pressure of the waves. Bolts for attaching watertight rubber sometimes loosened. Further, since the horizontal girder easily receives a water pressure due to waves and generates lift (push-up force), the door body swings due to the waves and the water outlet is opened and closed, and there is a possibility that a reverse flow may occur. In particular, when large waves such as strong winds caused by typhoons, tsunamis caused by earthquakes, etc., or when a flap gate is installed in a place with a large wave power and a long separation distance, damage due to waves and the occurrence of backflow become problems.

  Flap gates installed in coastal areas are always exposed to seawater, so they are prone to corrosion. In particular, there is electrolytic corrosion that occurs at the joints of metal members such as retainers and bolts for fixing watertight rubber. It is a problem. In coastal areas, it may be required to construct the tide, and it is desirable to be able to complete the installation work in a short time.

  The present invention has been made in view of the above points, is hardly affected by water pressure caused by waves, has excellent corrosion resistance, is easy to install, and is suitable for installation in coastal areas such as coasts and harbors. The purpose is to provide a flap gate.

In order to solve the above problem, the present invention is a flap gate attached to a water outlet opening in a wall surface,
The door has a sleeve communicating with the water outlet, and is supported by a door stop attached to the wall surface and a hinge provided above the sleeve of the door, and is in contact with the tip of the sleeve to open and close the water outlet. And a door body
The distal end portion of the sleeve is inclined upward with respect to a vertical surface with the door stop attached to the wall surface, and the door body has a flat outer surface and the outer shape is substantially the same as the outer shape of the sleeve. It is large in size and is difficult to receive the force generated by waves.

  According to the flap gate of the present invention, the door body has a flat outer surface and the outer shape is substantially the same as the outer shape of the sleeve of the door. It is suitable for installation.

It is a perspective view which shows the flap gate which concerns on one Embodiment of this invention. It is a front view of the flap gate shown in FIG. It is a side view of the flap gate shown in FIG. It is a longitudinal cross-sectional view by the AA line in FIG. 2 which shows the attachment part of the watertight rubber | gum of the flap gate of FIG.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.
With reference to FIG. 1 thru | or FIG. 3, the flap gate 1 which concerns on this embodiment is equipped with the water outlet 4 opened to the retaining wall 3 which faces the river of the pipe 2 and the shore, A door-to-door 5 to be attached and a door body 7 that is supported by the door-to-door 5 by a hinge 6 and opens and closes the water outlet 4 are provided. The pipe tub 2 is composed of a fume pipe or the like, and is open to the wall surface 3A of the retaining wall 3 as a vertical surface with the end portion as a water outlet 4.

  The door stop 5 has an opening corresponding to the water outlet 4, and has a flat base plate 8 attached to the wall surface 3 </ b> A of the retaining wall 3, and is attached integrally to the opening of the base plate 8 to the water outlet 4. A communicating cylindrical sleeve 9 is integrally formed. The shape of the base plate 8 is an octagon (see FIG. 2) in the present embodiment, but is arbitrary. The base plate 8 is attached to the wall surface 3A of the retaining wall 3 by a known anchor member 10 such as an all anchor or an anchor bolt. The distal end portion of the sleeve 9 is inclined upward by a predetermined angle θ (see FIG. 3) with respect to the base plate 8. A pair of hinge arm portions 11 are erected on the base plate 8 above the sleeve 9.

  The door body 7 is a disk-like member having a diameter substantially the same as the outer diameter of the sleeve 9 of the door stop 5 or a slightly larger diameter, and its outer surface is a flat surface. On the upper part of the door body 7, a pair of hinge arms 12 facing the pair of hinge arm portions 11 of the door stop 5 are provided. A hinge arm 12 of the door body 7 and a hinge arm portion 11 of the door stop 5 are pin-coupled via a link member 13 so as to be rotatable. Accordingly, the hinge 6 is constituted by the hinge arm portion 11, the hinge arm 12 and the link member 13, and the door body 7 is supported by the hinge 6 so as to be swingable to the door stop 5. The water outlet 4 is opened and closed by contact and separation. At this time, since the front end portion of the sleeve 9 is inclined upward by an angle θ with respect to the vertical plane, the door body 7 is pressed against the front end portion of the sleeve 9 by its own weight. The inclination angle θ of the distal end portion of the sleeve 9 can be appropriately set according to conditions such as the weight of the door body 7, the flow rate of the water discharge, the strength of the waves, but when the flap gate 1 is installed in the coastal area, It is good to set the angle around 5 °. Further, since the link member 13 is provided and the hinge 6 has a double hinge structure, the adhesion of the door body 7 to the sleeve 9 can be enhanced. In addition, although the inner surface of the door body 7 is a flat surface in this embodiment, it is good also as an uneven | corrugated shape which provided the rib for reinforcement etc. except the contact part with the sleeve 9. FIG.

  An annular watertight rubber 14 (watertight member) is attached to a contact portion of the door 7 with the sleeve 9 of the door stop 5, and the watertight rubber 14 comes into close contact with the sleeve 9, so that the door 7 comes out. The watertightness when closing the water inlet 4 is enhanced. As shown in FIG. 4, the watertight rubber 16 is an elastic body such as a synthetic rubber including a contact portion 15 having a semicircular cross section and a trapezoidal fitting portion 16, and is formed on the inner surface of the door body 7. The fitting portion 16 is fitted and attached to the annular dovetail groove 17. An annular groove 18 having a U-shaped cross section is formed on the end face of the fitting portion 16 of the watertight rubber 14, and a backup ring 19 (a backup member) having a circular cross section having a rigidity higher than that of the watertight rubber 14 is formed in the annular groove 18. ) Is fitted. When the watertight rubber 14 is assembled, the fitting portion 16 can be pushed into the groove 17 due to elastic deformation, and once assembled, the fitting portion 16 is provided by the backup ring 19 and the groove 17 side. It becomes difficult to come off by being pressed by the part, and the necessary bond strength can be obtained.

  The watertight rubber 14 may be formed in a ring shape in accordance with the diameter of the dovetail groove 17 in order to prevent undesired deformation of the contact portion 15 due to attachment to the door body 7. In this case, when manufacturing the door body 7 having different dimensions, the watertight rubber 14 is formed in an annular shape in accordance with the groove 17 having the maximum diameter, and after appropriately cutting to reduce the diameter, the cut portion is bonded. By joining by welding or the like, it is possible to adapt to the groove 17 having a smaller diameter. Thereby, manufacturing cost can be reduced, preventing a deformation | transformation of the contact part 15 at the time of attachment.

  Door door 5, door body 7, anchor member 10 and link member 13 are made of iron, stainless steel, aluminum alloy, or other materials having necessary strength and corrosion resistance, are appropriately coated, and are considered to be resistant to electrolytic corrosion. However, different materials can be used in combination as appropriate, but from the viewpoint of strength and corrosion resistance, it is desirable to use stainless steel. Since the door body 7 is pressed against the tip of the sleeve 9 of the door stop 5 by its own weight, the holding force in the closed position is increased by adopting a material having a relatively large mass such as stainless steel. be able to.

Next, the operation of the present embodiment configured as described above will be described.
The flap gate 1 is attached to the wall surface 3A of the retaining wall 3 as follows.
The sleeve 9 is positioned according to the water outlet 4 of the pipe rod 2, and the door stop 5 is fixed to the wall surface 3 </ b> A of the retaining wall 3 by the anchor member 10. As a result, the flap gate 1 can be installed without requiring any additional work such as placing concrete or embedding the door-to-door hardware in the retaining wall and temporarily closing it. It can be installed easily.

  When the water level on the outside of the water outlet 4 is low, the door body 7 is pushed open by the water flow from the inside, and when the water level on the outside increases, the door body 7 is brought to the tip of the sleeve 9 of the door stop 5 by water pressure. When pressed, the outlet 4 is closed to prevent backflow of the water flow. Thus, by automatically opening and closing the door body 7 due to the difference in water level between the inside and outside of the intake 4, when water flows from the pipe 2 to the river, the coast, etc., the water level rises due to increased water, high tide, waves, tsunami, etc. On the other hand, it is possible to prevent the reverse flow of the water.

  The door body 7 has a flat surface with no irregularities on the outer surface and is approximately the same as or larger in diameter than the outer diameter of the sleeve 9 per door. When installed on the ground, even if the door body 7 is subjected to water pressure due to waves, lift (push-up force) is unlikely to occur. Therefore, the door body 7 is prevented from swinging due to waves, thereby preventing backflow. it can. Moreover, the load which acts repeatedly on the door body 7 by the water pressure of a wave can be reduced, and damage to each part can be prevented and durability can be improved. Furthermore, by making the door body 7 into a flat shape, the number of places to be joined by welding or the like is reduced, so that the manufacturing accuracy can be improved and the manufacturing cost can be reduced.

  Since the watertight rubber 14 is fixed to the door body 7 by fitting the fitting portion 16 and the dovetail groove 17, the watertight rubber 14 can be easily attached to the door body 7, and is less likely to loosen and drop off. Moreover, since attachment members, such as a volt | bolt and a retainer, are unnecessary, the electric corrosion which arises in the junction part of metals is hard to produce, and the corrosion resistance of the door body 7 can be improved.

  In the above embodiment, the wall surface 3A of the retaining wall 3 to which the door stop 5 is attached is a vertical surface. However, even if the wall surface 3A is an inclined surface, the angle of the tip of the sleeve 9 of the door stop 5 with respect to the base plate 8 The flap gate 1 can be mounted by adjusting θ so that the angle of the front end of the sleeve 9 with respect to the vertical surface is about 5 ° with the door stop 5 attached to the wall surface 3A. .

  Further, in the above embodiment, the door body 7 and the sleeve 9 are described as having a circular shape corresponding to the tube rod 2 having a circular cross section, but the present invention is not limited thereto, and these shapes are rectangular or the like. Even if it is the shape of, it is applicable similarly.

  As described above, the flap gate 1 is easy to install when installed, and has high resistance to reverse flow, damage and corrosion caused by seawater, so it can be applied to coastal areas such as coasts and harbors. It is particularly suitable for installation, and excellent durability can be expected even in situations where large waves such as typhoons and tsunamis occur.

  DESCRIPTION OF SYMBOLS 1 ... Flap gate, 2 ... Pipe rod, 3 ... Wall surface, 4 ... Water outlet, 5 per door, 6 ... Hinge, 7 ... Door body, 9 ... Sleeve, 14 ... Watertight rubber, 17 ... Dovetail

Claims (3)

A flap gate attached to a water outlet opening on the wall surface,
The door has a sleeve communicating with the water outlet, and is supported by a door stop attached to the wall surface and a hinge provided above the sleeve of the door, and is in contact with the tip of the sleeve to open and close the water outlet. And a door body
The distal end portion of the sleeve is inclined upward with respect to a vertical surface with the door stop attached to the wall surface, and the door body has a flat outer surface and the outer shape is substantially the same as the outer shape of the sleeve. A flap gate that is large in size and difficult to receive the force generated by waves.   An annular watertight member that abuts the tip of the sleeve is attached to the door body, and the watertight member is fitted to a dovetail groove formed in the door body and attached to the door body. The flap gate according to claim 1.   The watertight member has a groove formed at an end portion of the fitting portion that fits into the dovetail groove, and a backup member that presses the fitting portion against the side surface portion of the dovetail groove is fitted into the groove. The flap gate according to claim 2 characterized by things.

Images