JP2005061201A - Horizontal door by buoyancy - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a defense device which solves the problems that a muddy stream unabsorbed by a sewage main pipe covers a road surface everywhere upon a downpour because of undeveloped preparation of the sewage main pipe incapable of catching up with urbanization, that those involved in management of a subway or the like are anxious about when the muddy stream inflows from a ventilation hole formed in the road surface as the abnormal weather is repeated, and that a defence means depending on an electric power or a sensor can do nothing when it comes to its breakage, and to provide the defense device which does not need the electric power or the sensor and is completely automatically opened and closed. <P>SOLUTION: The automatic and low-costed device without a need for the electric power or without a danger of breakage or deterioration is structured under a ventilation grating formed in the road surface in a manner that it is open at a normal time and is horizontally closed only upon flooding due to the downpour. The device includes a tank, which goes around the four sides of the ventilation hole, to receive the intruded water. A float linked with an open/close door is disposed in the tank so that the float may go up and down by the buoyant force of the intruded water. The float is linked with the door above it by the intermediary of a pulley. When the intruded water leaves by discharging the water through a safety valve which discharges a predetermined safe amount of water, the door is automatically opened. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

Detailed Description of the Invention

  The present invention is required in daily life to prevent inundation of buildings and structures.

  Because it depends on sensors and electric power, it is not used at all when a sensor or generator fails. Even if the shutter closes due to a malfunction of the sensor, it does not open automatically. I'm anxious.

Problems to be solved by the invention

  It automatically prevents muddy currents from entering through heavy-duty rain vents on the roadway subway, etc., and automatically opens with a certain amount of safe drainage from the valves when muddy currents stop. Anxiety due to power outages and sensor failures is eliminated.

Means to solve the problem

  With the configuration shown in claim 1, the float accepts only the amount of water necessary for the float to rise up from the four sides of the ventilation port, and the float rises with that amount of water and leads to a door that rises slightly obliquely on the pulley. Loosen the rope, the door descends by its own weight and is set horizontally to prevent the intrusion of muddy water, and when muddy flow stops, the float also falls from the safety valve due to water discharge, and the door opens automatically.

  Underneath the grating of the ventilation opening on the road surface of a subway or the like, a muddy water receiving tank that raises and lowers the float in four directions where there is a risk of muddy water intrusion is placed, and a float is placed in it, and the float and the upper part are horizontal with their own weight The door is installed at a slight angle so as to be connected with a pulley, and when the muddy stream enters, the float will float and the door will become horizontal to prevent intrusion water. If the muddy flow stops when the water is discharged from the safety valve, the door opens automatically. No power or sensor required.

The invention's effect

  The intrusion of turbidity from heavy ventilation through subway and other road vents is automatically prevented without any sensor or power, and if the turbulence is lost, the door is automatically opened without power or sensor. It is the cheapest and safest, and there is no worry of sensor failure or malfunction.

  Top view with horizontal door open   Top view with horizontal door closed   Cross section with horizontal door open   Cross section with horizontal door closed

Explanation of symbols

1. Horizontal door 2. Float 3. Pulley 4. Rope 5. 5. Water tank for all sides float 6. Pushing rod with spring Float guide

Claims (1)

  The door (1) that shuts up the turbidity that intrudes under heavy rain under the grating of the subway vents facing the road is always set up in balance with the load of the float (2) connected by the pulley (3). When a certain amount of turbidity flows, the float rises, the rope (4) is loosened through the pulley (3), pushed by the spring-loaded push rod (4), until it becomes horizontal due to its own weight, The door (1) descends and prevents the muddy flow from flowing. If the muddy water is discharged from a valve that discharges a certain amount of muddy water in a safe way to the four tanks (5) that receive muddy water containing the float (2), the door (1) will automatically start as soon as muddy water stops entering. Open. The door can be opened partially depending on the scale, and the door unit can be connected.

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