JPH0610680U - Water level detection type automatic closing flap gate - Google Patents

Abstract

(57) [Summary] [Construction] A door body 7 for opening and closing the opening of the upstream water channel 2 is arranged in the main body tank 1 in which the upstream water channel 2 is opened on one side and the downstream water channel 3 is opened on the other side. At the same time, the door body 7 is swingably provided around the upper horizontal support shaft between a fully open position and a fully closed position, and the door body 7 is hoisted above the door body 7 through the rope 9 in the opening direction. The machine 8 is provided, the hoisting machine 8 is provided with a lock mechanism including the ratchet 10, and the float device 12 for releasing the ratchet at the set water level is provided in the main body tank. [Effect] In normal times, by holding the door body 7 in the fully open position, the water flow in the water channel flows smoothly, and in an abnormal state, the lock mechanism of the hoisting machine 8 is released by the float device 12 at the set water level, so that The backflow can be prevented by closing 7 by its own weight.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a water level detection type automatic closing flap gate that is provided in a waterway of river water, sewage, rainwater drainage, etc. and prevents backflow in the event of an abnormality.

[0002]

[Prior art]

 Conventionally, sluices for river water, sewage, drainage of rainwater, etc. have been equipped with a plug gate to prevent backflow. The flap gate is configured so that the door body placed in the waterway is swingable between the fully open position and the fully closed position, the door body is opened by the flow of water flowing through the waterway, and is closed by the weight of the door body. It was

[0003]

[Problems to be solved by the device]

 However, in the above-described conventional configuration, the flow rate of the water flowing through the water channel such as sewage is slow and the flow rate is small, so that there is a problem that the opening of the door becomes small and the smooth flow of the water is obstructed.

The present invention solves the above problems, and an object of the present invention is to provide a water level detection type automatic closing flap gate that is fully opened at all times and fully closed at the time of an abnormality.

[0005]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the present invention provides a main body tank having an upstream water channel opening on one side and a downstream water channel opening on the other side, and a door body for opening and closing the opening of the upstream water channel in the main body tank. And a swingable shaft around the horizontal support shaft that supports the upper part of the door body between the fully open position and the fully closed position, and the door body is hung above the door body in the opening direction via the rope. An upper machine is provided, a lock mechanism composed of a ratchet is provided on the hoisting machine, and a float device for releasing the lock mechanism ratchet at the set water level is provided in the main body tank.

[0006]

[Action]

 With the above configuration, the door is normally lifted by the hoist to the fully open position and held by the lock mechanism. In this state, the water flow flowing through the upstream water channel flows into the downstream water channel through the main tank, and the float device in the main tank moves up and down following the water level in the tank. Since the door is fully open at the opening of the upstream water channel in the main tank, it becomes a full port, and the water flow through the upstream water channel smoothly flows into the downstream water channel without being affected by its flow velocity or flow rate.

Then, due to a flood or the like, the water flow reverses from the downstream side water channel into the main body tank, and when the main body tank reaches the set water level, the float device that rises with the water level releases the ratchet of the lock mechanism. For this reason, the door body closes due to its own weight, closing the opening of the upstream water channel and preventing backflow of the water flow.

[0008]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. 1 and 2, an upstream side water channel 2 is opened on one side wall of the main body tank 1, and a downstream side water channel 3 is opened on the other side wall, and both the water channels are formed by pipelines.

A gate device 4 that opens and closes the opening of the upstream water channel 2 is provided inside the main body tank 1, and the gate device 4 is fixed to a fixed frame 5 that surrounds the opening of the upstream water channel 2. The frame 5 has a door body 7 whose upper portion is pivotally mounted via a horizontal support shaft 6, and the door body 7 swings around the horizontal support shaft 6 between a fully open position and a fully closed position.

A hoisting machine 8 is provided inside the main body tank 1 above the door body 7. The hoisting machine 8 lifts the door body 7 in the opening direction via a rope 9. Is. Further, the hoisting machine 8 is provided with a ratchet 10 composed of a gear 10a and a locking pawl 10b as a lock mechanism for locking the rotary shaft in the closing direction of the door body 9, and the locking pawl 10b of the ratchet 10 is provided with the ratchet 10. Is provided with an operating arm 11 integrally.

Further, a float device 12 is provided inside the main body tank 1, and the float device 12 is a float body 13 that moves up and down according to the water level in the tank, and an operating shaft whose bottom end is fixed to the float body 13. Have fourteen. The operating shaft 14 is supported by the wall of the main body tank 1 so as to be movable up and down, and the upper end is located below the operating arm 11. When the float body 13 reaches the set water level (SWL) for backflow prevention. The latching pawl 10b of the ratchet 10 is formed to have a length for lifting and releasing the pawl 10b.

The hoisting machine 8 is provided with a centrifugal brake 15 when the door body 7 is large. The operation of the above configuration will be described below. Normally, the hoisting machine 8 lifts the door 7 of the gate apparatus 4 to the fully open position and holds it by the ratchet 10. In this state, the water flow flowing through the upstream water channel 2 flows out to the downstream water channel 3 through the main body tank 1, and the float body 13 inside the main body tank 1 moves up and down following the water level in the tank. At the opening of the upstream water channel 2 of the main body tank 1, since the door 7 is at the fully open position, it becomes a full port, and the water flow flowing through the upstream water channel 2 is smoothly influenced by the flow velocity and flow rate, and the downstream water channel 3 smoothly. Flows to.

Then, when a water flow reverses from the downstream water channel 3 into the main body tank 1 due to a flood or the like, and the internal water level of the main body tank 1 reaches the set water level (SWL), the float body 13 that rises with the water level moves the operating shaft 14 And the upper end of the operating shaft 14 lifts the operating arm 11 to release the engagement between the locking claw 10b and the gear 10a. Therefore, the door body 7 is closed by its own weight, and the opening of the upstream water passage 2 is closed to prevent the backflow of the water flow.

Further, when the door body 7 is large, the centrifugal brake 15 can suppress the closing speed and reduce the impact at the time of full closing.

[0015]

[Effect of device]

 As described above, according to the present invention, by holding the door body in the fully open position during normal operation, the float device that smoothes the flow of the water flow through the water channel and moves up and down following the water level in the main body tank in the event of an abnormality By releasing the lock mechanism of the hoist at the set water level, the door can be closed by its own weight to prevent backflow.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of a water level detection type automatic closing flap gate according to an embodiment of the present invention.

FIG. 2 is a perspective view of a hoisting machine according to the embodiment.

[Explanation of symbols]

 1 Main Tank 2 Upstream Channel 3 Downstream Channel 7 Door 8 Hoisting Machine 10 Ratchet 12 Float Device

Claims (1)

[Scope of utility model registration request] 1. A main body tank having an upstream side water channel opening on one side and a downstream side water channel opening on the other side, and a door body for opening and closing the opening of the upstream side water channel is provided in the main body tank, and a door body is also provided. A hoisting machine is provided around the horizontal support shaft that supports the upper part of the door so that it can swing freely between the fully open position and the fully closed position. A water level detection type automatic closing flap gate, characterized in that the machine is provided with a ratchet lock mechanism, and a float device for releasing the ratchet of the lock mechanism at the set water level is provided in the main body tank.