JPS6325473Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to an air intake for a shelter.

Previously, air intakes for evacuation centers were considered only to prevent rain, snow, birds, and insects from entering, and no consideration was given to shocking changes in air pressure caused by explosions that occur near evacuation centers. . Therefore, if high-pressure air is generated in the space near the air intake, the high-pressure air will flow into the evacuation center, causing a sudden rise in pressure inside the evacuation center, which will have a negative impact on the people and equipment inside. It was hot.

The present invention aims to eliminate the above-mentioned drawbacks by providing one or more spiral pipes passing through the chevron block in the longitudinal direction, and arranging a cyclone separator in the middle of the spiral pipes. By taking in air from the cyclone separator through an intake pipe, an air intake for a shelter is capable of taking in air stably by taking in high pressure air from the outside world, reducing the pressure, and removing dust. It provides:

DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of the present invention will be explained in detail below based on the drawings showing one embodiment thereof.

In Figures 1 and 2, the chevron block 1
is made of reinforced concrete, etc., and the total length is:
The length is L=2600mm. The upper part of the chevron block 1 has a semicircular cross section with a radius of R=600 mm, and the lower part has a height of H=700 mm. In the center of the chevron block 1, there is a diameter: D = 300 mm.
A cylindrical cyclone separator 2 with a total length L ₁ =600 mm is provided along the longitudinal direction of the chevron block 1, and the outer surfaces 5, One or more spiral conduits 8, one end of which is open as an air intake port 7, are fixed to the other ends of the conduit 6, respectively, so that the cyclone separator 2 and the outside world of the chevron block 1 are communicated with each other. This spiral conduit 8 has a diameter: D ₁ =50 mm, and a spiral pitch: P =
1000 mm, pitch circle diameter: D _p = 250 mm. An intake pipe 9 is arranged inside the cyclone separator 2, and the intake pipe 9 has a diameter D ₂ =
It is formed to 80mm. Further, the opening of the intake pipe 9 is located at a distance of L ₂ =150 mm from the side surface 4 of the cylindrical cyclone separator 2 . The air sucked into the intake pipe 9 passes through the conduit 10 from the intake pipe 9, passes through a filter, an air purifier, an air pump, etc., and enters the underground shelter 11 as shown in FIG. will be introduced. In Fig. 3, 12 is a staircase connecting the evacuation center 11 and the ground;
13 is the intake equipment installed inside the evacuation center 11,
A conduit 10 is connected. Further, each of the spiral pipes 8 and the cyclone separator 2 may be provided with a drain, if necessary. In addition,
A description of the device provided in the air intake port 7 for preventing rain, snow, and birds and insects from entering will be omitted.

In normal use with such a configuration, air sucked in from the air intake ports 7 on both outer surfaces 5 and 6 of the chevron block 1 passes through the spiral pipe 8 and enters the cyclone separator 2, and the cyclone separator 2 enters the cyclone separator 2. Inside the separator 2, the air is sucked into the intake pipe 9 and guided to the conduit 10. If high-pressure air is generated near the air intake port 7, for example due to a blast wave, it will flow in at high speed from the air intake port 6 on one of the outer surfaces of the chevron block 1, but this inflowing air will spiral. While passing through the pipe 8, the pressure is significantly reduced due to the frictional force with the pipe wall and the turbulent flow, and as the air flows into the cyclone separator 2, it expands and is reduced in pressure. The dust, along with excess air, flows into the spiral pipe 8 opposite to the inflow side.
flows out from In this case, in the state shown in Figure 1,
When air flows in from the right helical conduit 8, excess air flows out from the left helical conduit 8. Also,
The opposite case also holds true. As a result, the air from which dust has been removed by the cyclone separator 2 is guided from the intake pipe 9 to the conduit 10 at almost normal pressure, and flows into the shelter 11.

As described above, according to the present invention, high-pressure air from the outside world is taken in, the pressure is reduced, and dust is removed, so that stable air can be taken in.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a front view, FIG. 2 is a right side view, and FIG. 3 is a usage state diagram. 1... Chevron block, 2... Cyclone separator, 8... Spiral pipe, 9... Intake pipe.

Claims (1)

[Scope of utility model registration request] One or more spiral pipes 8 are provided in the longitudinal direction of the chevron block 1, and a cyclone separator 2 is disposed in the middle of the spiral pipe 8. Air is drawn from the cyclone separator 2 through an intake pipe 9. An air intake for shelters, which is characterized by taking in air.