JP5207003B2 - Flap gate - Google Patents

Description

  The present invention relates to a flap gate that is provided at a water outlet from a pipe tub (pipe) such as a fume pipe to a river, a coast, or the like, and prevents reverse flow of the water.

  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 the pipe to rivers, coasts, 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.

  As a prior art regarding this type of flap gate, for example, there is one described in Patent Document 1. The flap gate described in Patent Document 1 can be directly attached to an end portion of a fume pipe having a circular cross section constituting a pipe rod, and is a fastening capable of reducing the diameter wound around the outer periphery of the fume pipe. A band, a door attached to the upper part of the fastening band by a hinge so as to open and close the water outlet, and a weight for biasing the door to a closed position by its own weight. As a result, the flap gate can be directly attached to the end of the fume tube protruding from the retaining wall such as a river or the coast by tightening the fastening band, so that the hardware for the door supporting the door body is embedded in the retaining wall. There is no need, and the installation work of the flap gate can be greatly simplified.

Japanese Utility Model Publication No. 58-6824

  As a member constituting the tube rod, there is a heavy pressure tube 1 as shown in FIG. As shown in FIG. 5, the heavy pressure tube 1 has a tubular member having a circular cross-section flow passage 2 inside and a two-sided shape having flat portions 3 and 4 parallel to each other at the upper and lower portions, Both side surface portions 5 are curved and bulge outward. In the example shown in the drawing, the outer shape of the both side surface portions 5 of the heavy pressure tube 1 is a combination of a circular arc and a straight line in contact with both ends thereof. Further, the heavy pressure tube 1 has a cylindrical joint portion 2A concentric with the flow path 2 at one end portion and a cylindrical recess portion formed at the other end portion, and the joint portion 2A and the recess portion are fitted. Thus, a plurality of heavy pressure tubes 1 can be joined.

  The heavy pressure pipe 1 is a reinforced concrete pipe, and can be manufactured by a centrifugal molding method using a method for manufacturing a fume tube having a circular cross section. Moreover, the heavy pressure pipe 1 has high strength against a load in the vertical direction in addition to the characteristics according to the fume pipe, and has flat portions 3 and 4 at the top and bottom, so that the stability at the time of installation is good and the construction is easy. Therefore, it is widely used as a tube fistula.

  However, when the flap gate is attached to the heavy pressure tube 1, the cross-sectional shape is not circular, and the straight portion (flat portions 3 and 4) and the curved portion (side surface portion 5) are mixed. In the flap gate described in Document 1, it is difficult to tighten with a fastening band, and it cannot be mounted.

  This invention is made | formed in view of said point, and it aims at providing the flap gate suitable for mounting | wearing to the double-chamfered heavy pressure pipe which has a flat part up and down.

In order to solve the above-mentioned problem, the present invention is a flap gate that is attached to a two-sided chamfered pressure pipe having a flat part at the upper part and the lower part and having a curved side part,
Attached to the door stop member that abuts against the flat portion of the upper and lower portions of the pressure pipe, extends along the flat portion in the width direction of the pressure pipe, and the door contact member that contacts the flat portion of the upper portion by hinges. The door body that opens and closes the flow path of the heavy pressure pipe, and the door stop members that extend along the curved side surface of the heavy pressure pipe and respectively contact the upper and lower flat portions are connected to each other. And a flexible band-shaped fastening band for applying tension between the two.

  According to the flap gate according to the present invention, the door stop members that respectively contact the upper and lower flat portions of the pressure pipe are connected to each other by a flexible fastening band extending along the curved side surface of the pressure pipe, By applying tension between them, it can be directly attached to a double-chamfered heavy pressure tube.

It is a perspective view which shows the state which mounted | wore the heavy pressure pipe with the flap gate which concerns on one Embodiment of this invention. It is a front view which fractures | ruptures and shows a part of flap gate of FIG. It is a side view of the flap gate of 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. It is a perspective view of the edge part of the heavy pressure pipe | tube with which the flap gate of FIG. 1 is mounted | worn.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.
1 to 5, the flap gate 6 according to the present embodiment is attached to the heavy pressure pipe 1 shown in FIG. 5 and opens and closes the flow path 2 of the heavy pressure pipe 1 serving as a water outlet. The substantially disc-shaped door body 7, the upper door contact member 8 that contacts the flat portion 3 on the upper side of the pressure tube 1 and supports the door body 7 by the hinge 10, and the lower door contact that contacts the lower flat portion 4 A member 9, a flexible fastening band 11 that connects the upper door stopper member 8 and the lower door stopper member 9, and a counterweight 12 attached to the door body 7 are provided.

  The door body 7 is a disk-like member having a diameter slightly larger than the outer diameter of the cylindrical joint portion 2A of the heavy pressure pipe 1, and a pair of hinge arms 13 are provided on the upper part. An annular watertight rubber 14 (see FIG. 4) made of an elastic body such as synthetic rubber is attached to the inner surface of the door body 7 so as to face the end surface of the joint portion 2A of the heavy pressure tube 1. The watertight rubber 14 has a convex cross section, and a contact portion 14A that contacts the end surface of the joint portion 2A protrudes at the center. The watertight rubber 14 is fixed by attaching to the door body 7 with bolts 17 annular holding plates 15 and 16 that are in contact with the inner and outer peripheral sides of the contact portion 14A. On the outer surface of the door body 7, a screw rod 18 is erected at the center, and a plurality of disc-shaped (two in the illustrated example) counterweights 12 are attached to the screw rod 18. The counterweight 12 is clamped by a pair of nuts 18 </ b> A that are threaded into the screw rod 18 through the screw rod 18. Thereby, the mounting position and the number of counterweights 12 can be adjusted by the tightening positions of the pair of nuts 18A.

  The upper door stop member 8 is a linear member extending in the width direction along the flat portion 3 on the upper portion of the heavy pressure tube 1, and has an L-shaped cross-section and an attachment surface 8A along the flat portion 3. And a support surface 8B that is perpendicular to the attachment surface 8A and extends along the end surface of the pressure tube 1. At both end portions of the attachment surface 8A, screw portions 19 provided at the upper end portion of the fastening band 11 are inserted, and connecting portions 21 that are connected by nuts 20 are formed. The coupling portion 21 is inclined at a predetermined angle with respect to the flat portion 3 so that the screw portion 19 of the fastening band 11 along the curved side surface portion 5 of the heavy pressure tube 1 is vertically inserted. A pair of hinge arm portions 22 that are opposed to the pair of hinge arms 13 of the door body 7 are erected on the support surface 8 </ b> B of the upper door stop member 8. A reinforcing rib 23 is provided on the back surface portion of the hinge arm portion 22 of the support surface 8B. The hinge arm 13 of the door body 7 and the hinge arm portion 22 of the upper door stop member 8 are pin-coupled via a link member 24 so as to be rotatable. Thereby, the hinge 10 is comprised by the hinge arm 13, the hinge arm part 22, and the link member 24, and the door body 7 is supported by the upper door stop member 8 by the hinge 10 so that rocking is possible, and the joint part 2A of the heavy pressure pipe 1 When the watertight rubber 14 comes into contact with and separates from the tip of the channel 2, the flow path 2 is opened and closed.

  The lower door stop member 9 is a rectangular pipe member having a rectangular closed cross-sectional shape, and extends linearly along the width direction of the flat portion 4 at the lower portion of the heavy pressure tube 1. Cylindrical attachment portions 25 provided at the lower end portion of the fastening band 11 are pin-coupled to both ends of the lower door stop member 9 so as to be rotatable.

  The fastening band 11 is a band-shaped member having flexibility, and a mounting portion 25 is provided at the lower end portion, and a screw portion 19 is provided at the upper end portion. Then, the attachment portion 25 is pin-coupled to the lower door stop member 9, is extended upward along the side surface portion 5 of the pressure tube 1, and the screw portion 19 is inserted into the joint portion 21 of the upper door stop member 8, By screwing and tightening the nut 20 (which is a double nut for preventing loosening), tension is applied between the lower door contact member 8 and the upper door contact member 9 to fix them to the heavy pressure tube 1. In the illustrated example, two fastening bands 11 are provided on each side of the heavy pressure tube 1, but one or two or more may be provided, and the number of the fastening bands 11 depends on each part of the flap gate 6. What is necessary is just to set suitably according to a dimension, intensity | strength, etc.

  The door body 7, upper and lower door contact members 8, 9 are made of coated steel, stainless steel, aluminum alloy, and other materials having necessary strength and corrosion resistance, and the fastening band 11 is made of stainless steel, other The material can have the necessary strength, flexibility and corrosion resistance.

Next, the operation of the present embodiment configured as described above will be described.
The flap gate 6 can be attached to the heavy pressure tube 1 as follows.
The tip of the heavy pressure tube 1 protrudes from the wall surface such as a retaining wall, the upper and lower door contact members 8 and 9 are brought into contact with the upper and lower flat parts 3 and 4 respectively, and the fastening band 11 is placed along the side part 5 In this way, the flap gate 6 is fitted into the heavy pressure tube 1. Then, the nut 20 is screwed and fastened to the threaded portion 19 of the fastening band 11, and tension is applied to the fastening band 11, thereby fixing the upper and lower door contact members 8 and 9 to the heavy pressure tube 1. An appropriate number of counterweights 12 are attached to the screw rods 18 and fixed with nuts 18A. The biasing force in the closing direction of the door body 7 is adjusted by changing the mounting position of the counterweight 12 according to the tightening position of the nut 18 and adjusting the position of the center of gravity of the door body 7. In this way, the flap gate 6 can be easily attached to the pressure pipe 1 having a two-chamfered shape.

  At this time, the fastening band 11 having flexibility applies tension between the upper and lower door contact members 8 and 9 along the side surface portion 5 of the heavy pressure tube 1, so that the fastening band 11 is stably held and loosened due to displacement. Can be prevented. Further, the fastening band 11 is pin-coupled so that the mounting portion 25 can rotate to the lower door stop member 9, and the screw portion 19 is inserted vertically into the inclined connection portion 21 of the upper door stop member 8, so that the nut 20 By tightening, tension can be generated efficiently.

  Since the flap gate 6 can be directly attached to the heavy pressure pipe 1, there is no need for construction such as placing concrete for installing door-to-door hardware on a wall such as a retaining wall, and the installation work should be simplified. Can do. When the water level on the outside of the water outlet is low, the door body 7 is pushed open by the water flow from the inside, and when the water level on the outside becomes high, the joint portion 2A of the heavy pressure pipe 1 where the door body 7 is the water outlet due to water pressure. To prevent backflow of water flow. In this way, by automatically opening and closing the door body 7 due to the difference in water level between the inside and outside of the intake, when water flows from the pipe to rivers, coasts, etc., the water level rises due to increased water, high tides, waves, tsunamis, etc. It is possible to prevent backflow of the water.

  In the above embodiment, the screw portion 19 is provided at the lower end portion of the fastening band 11, the coupling portion 21 through which the screw portion 19 is inserted is formed in the lower door stop member 9, and the attachment portion 25 is provided at the upper end portion of the fastening band 11. The attachment portion 25 may be pin-coupled to the upper door stop member 8 so as to be rotatable. Alternatively, instead of the attachment portion 25, the screw portions 19 may be provided at both ends of the fastening band 11, and the coupling portions 21 through which the screw portions 19 are inserted may be formed in both the upper and lower door contact members 8 and 9. .

  DESCRIPTION OF SYMBOLS 1 ... Heavy pressure pipe, 2 ... Flow path, 3, 4 ... Flat part, 5 ... Side part, 6 ... Flap gate, 7 ... Door body, 8 ... Upper door contact member (door contact member), 9 ... Lower door contact member (Door-to-door member) 10 ... hinge, 11 ... fastening band

Claims (3)

A flap gate having flat portions at the upper and lower portions and attached to a double-sided-shaped heavy pressure tube having a curved side surface portion,
Attached to the door stop member that abuts against the flat portion of the upper and lower portions of the pressure pipe, extends along the flat portion in the width direction of the pressure pipe, and the door contact member that contacts the flat portion of the upper portion by hinges. The door body that opens and closes the flow path of the heavy pressure pipe, and the door stop members that extend along the curved side surface of the heavy pressure pipe and respectively contact the upper and lower flat portions are connected to each other. And a flexible belt-like fastening band for applying tension between the two. The fastening band is provided with a threaded portion at an end, the threaded portion is inserted into a coupling portion formed in the door stop member, and tension is generated by tightening a nut screwed onto the threaded portion, The flap gate according to claim 1, wherein the coupling portion is inclined with respect to the flat portion so that the screw portion is inserted vertically. 3. The flap gate according to claim 1, wherein one end portion of the fastening band is rotatably coupled to one of the door stop members.

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