JPH1136270A - Trough pipe backflow preventing gate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To invariably improve the drain state and reduce opening/closing troubles caused by foreign matters. SOLUTION: This trough pipe backflow preventing gate is provided with two upper and lower door bodies 3, 4 openable/closable with the horizontal axes serving as fulcrums at the upper section and the lower section of the main river side outlet of a trough pipe. An upper torque arm 6 is fixed to the upper door body 3 rotatably around the upper horizontal axis, a lower torque arm 7 is fixed to the lower door body 4 rotatably around the lower horizontal axis 2, and the upper torque arm 6 and the lower torque arm 7 are connected by an interlocking arm 10 so that the upper door body 3 is opened to the main river side when the lower door body 4 is opened to the main river side. A counterweight 8 can be fixed to the upper door body 3 rotatably around the upper horizontal axis, and a balance weight 9 can be fixed to the lower door body 4 rotatably around the lower horizontal axis 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a non-powered gate installed at an outlet of a gutter or the like provided in a river for the purpose of preventing backflow.

[0002]

2. Description of the Related Art Conventionally, as a non-powered gate installed at a gutter pipe outlet or the like for the purpose of preventing backflow, an upper hinge type flap gate is generally used, and is often used.

FIGS. 9 and 10 are a longitudinal sectional view and a front view showing the structure of a conventional non-powered backflow prevention gate. In the figure, reference numeral 21 denotes a door body which is installed at a gutter pipe outlet so as to be freely opened and closed by a hanging bracket 22, and 23 denotes a door stop. In this gate, when the upstream water level> the downstream water level, the water is drained only when the door 21 is slightly opened by the water pressure and the water is drained.
Garbage on the upstream side cannot be removed and accumulates in part a.
When the water level on the downstream side rises, the door 21 is completely removed by trash etc.
Is not closing and flows backward. Further, when the door 21 is closed, the lagoon soil is deposited on the downstream part b, and there is a problem that the gate 21 does not open even if the upstream water level rises.

As described above, the advantage of the gate is that no artificial operation is required (non-powered type). However, since the gate is installed in a normally closed state (covering the drainage section of the gutter pipe), The normal drainage state is not always good, and it is easy for incomplete blockage or inability to open and close due to slight impurities.

[0005]

SUMMARY OF THE INVENTION The present invention is to solve the following problems with respect to the above-mentioned prior art. 1. Improve the normal drainage condition (ensure normal open condition). When the upstream water level is higher than the downstream water level, the gate is opened in a double-door manner to discharge the upstream water. Also, when the water level on the downstream side is extremely low, a good drainage environment is created by keeping the water level fully open.

[0006] 2. Minimize opening and closing obstacles due to foreign substances and the like.

[0007]

In order to solve the above-mentioned problems, a backflow prevention gate for a gutter pipe according to the present invention comprises an upper and a lower part which can be opened and closed with a horizontal axis as a fulcrum at an upper part and a lower part of a main river side outlet of the gutter pipe. A gate composed of a plurality of door bodies is provided, and an upper torque arm is fixed to the upper door body so as to be rotatable around an upper horizontal axis, and the lower door body is rotatable around a lower horizontal axis. The lower torque arm is rotatably fixed to the upper torque arm and the lower torque arm by an interlocking arm such that when the lower door body opens to the main river side, the upper door body also opens to the main river side. It is a concatenation.

In this gate, a counter weight is fixed to the upper door body so as to be rotatable around the upper horizontal axis, and a balance weight is rotatably mounted to the lower door body around the lower horizontal axis. The structure can be fixed.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be specifically described with reference to embodiments. FIG. 1 is a side view of an embodiment of the present invention at the time of closing a door, FIG. 2 is a front view thereof, and FIGS. 3 and 4 are side watertight portions of daytime portions and upper and lower side watertight portions of door bodies 3 and 4. It is an enlarged view. In these figures, 1 is the upper hinge,
2 is a lower hinge, 3 is an upper door, 4 is a lower door, 5 is a door receiver, 6 is an upper arm, 7 is a lower arm, 8 is an upper weight (counter weight), 9 is a lower weight (balance weight), 10 is a connecting arm, 11 is an upper door stop,
12 is a lower door stop, 13 is an upper watertight rubber, 14 is a lower watertight rubber, 15 is an intermediate watertight rubber, 16 is a side watertight plate, 1
7 is a side watertight rubber, 18 is a vertical shaft, 19 is a watertight frame, 2
Numeral 0 denotes a rotating side watertight rubber.

In the present embodiment, the upper and lower doors 3, 4 are fixed to side arms 7, 8, and these arms 7, 8 are connected by a connecting arm 10 and rotated to form two doors. The mechanism is such that the third and fourth members can be opened and closed at a fixed angle relative to each other in a double-tone manner.

At the gate of the above mechanism, weights 8 and 9 are attached to the upper and lower arms 7 and 8 at fixed angles, respectively.
The rotational force of the upper and lower doors 3 and 4 is adjusted by adjusting the weight according to the weight of each door 3 and 4.

FIG. 5 is a side view when the door is closed, and FIG. 6 is a side view when the door is fully opened.

By providing such an adjusting mechanism,
The gates of the lower doors 3 and 4 are appropriately adjusted, and the gates are automatically and non-powerfully opened and closed according to fluctuations in the water level on the upper and lower sides of the gutter pipe.

Both the upper and lower gates are normally open, and they are opened and closed by a slight difference in water level between the main river and tributaries. When flooding (when the water level on the main river rises), the gates are completely closed. Prevent backflow to the gutter pipe side.

FIG. 7 shows the operation state of the gate when the water level on the main river side is decreasing. When the water level on the main river side decreases, water pressure is applied to the lower door body 4 and the lower door body 4 tilts toward the main river side. When the lower door body 4 tilts, the upper door body 3 is also opened by the connecting arm 10. When the water level on the main river side decreases, finally, as shown in FIG.
4 is in a fully open state.

FIG. 8 shows the operation state of the gate when the water level on the main river side rises. FIG.
As shown in (b), when the water level on the main river side rises slightly,
The buoyancy acts on the lower door body 4 and the lower door body 4 rises in the closing direction from the fully opened state. In conjunction with it, connecting arm 1
The action of 0 also lowers the upper door 3. When the water level on the Honkawa side rises further, the lower door body 4 rises accordingly, the upper door body 3 also descends, and the gate closes. When a water level difference equal to or more than a certain level is generated, a fully closed state is set as shown in FIG.

[0017]

As described above, according to the present invention, the upper and lower doors are both opened at all times, and are opened / closed by a slight difference in water level between the main river and the tributaries. (When the side water level rises), it is reliably completely closed, and backflow to the tributary (gutter) side can be reliably prevented.

1) When the water level on the main river side is low at all times, a good drainage function is ensured by keeping it open. Even if there is a slight difference in water level, the lower / floating type overturn gate can be drained in an overflow state, so that no dust remains in the gutter pipe.

2) By properly securing the weight balance of the upper and lower gates, the closing operation can be surely performed with a slight difference in water level, and at the same time, when the water level on the main river exceeds the internal water level, it is always fully closed. Can be secured.

3) Even if foreign matter or the like remains on the hinge portion of the lower gate, the gate can be easily removed by natural drainage or the like, and the gate can be formed in a shape and structure that does not hinder opening and closing operations.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing an embodiment of the present invention.

FIG. 2 is a front view of the embodiment of the present invention.

FIG. 3 is an enlarged view of a side watertight portion at an intermediate portion of a door body.

FIG. 4 is an enlarged view of upper and lower side watertight portions of a door body intermediate portion.

FIG. 5 is a side view of the embodiment when the door is closed.

FIG. 6 is a side view of the embodiment when the door is fully opened.

FIG. 7 is a flowchart showing an operation when the water level on the main river side decreases in this embodiment.

FIG. 8 is a flowchart showing an operation when the water level on the main river side rises in this embodiment.

FIG. 9 is a side view showing the structure of a conventional gate.

FIG. 10 is a front view showing a structure of a conventional gate.

[Explanation of symbols]

1 upper hinge, 2 lower hinge, 3 upper door, 4
Lower door, 5 door holder, 6 upper arm, 7 lower arm,
8 upper weight (counter weight), 9 lower weight (balance weight), 10 connecting arms, 11 upper door stop, 12 lower door stop, 13 upper watertight rubber, 14 lower watertight rubber, 15 intermediate watertight rubber, 16
Side watertight plate, 17 side watertight rubber, 18 vertical shaft, 1
9 Watertight frame, 20 rotation side watertight rubber

Claims (2)

[Claims] 1. A gate comprising two upper and lower doors which can be opened and closed with a horizontal axis as a fulcrum, respectively, at an upper part and a lower part of a main river side outlet of a gutter pipe, wherein the upper door body is provided with an upper horizontal axis. An upper torque arm is rotatably fixed around a center, and a lower torque arm is fixed to the lower door body so as to be rotatable about a lower horizontal axis. The upper torque arm and the lower torque arm are A backflow prevention gate for gutter pipes, which is connected by an interlocking arm so that the upper door opens to the main river when the lower door opens to the main river. 2. A counter weight is fixed to the upper door body so as to be rotatable around the upper horizontal axis, and a balance weight is fixed to the lower door body so as to be rotatable around the lower horizontal axis. The backflow prevention gate for a gutter tube according to claim 1, wherein