JPH0248712B2 - KENCHIKUBUTSUNOMAKUYANENOBOCHOHOJOSOCHI - Google Patents

Description

TECHNICAL FIELD OF THE INVENTION The present invention relates to an auxiliary device for inflating a membrane roof of a building having a membrane roof.

(Prior Art) Flexible membrane roofs that are inflated by air are sometimes used as the roofs of all-weather stadiums, large gymnasiums, and other buildings. This membrane roof, when inflated, gives the building a predetermined height and volume and covers the top of the building, so it must be kept in an inflated state at all times, and a blower is generally used to inflate it. be done.

(Problem to be solved by the invention) By the way, membrane roofs shake a lot when there is wind, so in order to suppress this shaking, a blower is activated to draw air into the building when there is wind, increasing the internal pressure. That's what I do. As a result, the electricity usage fee for the blower increases when there is wind.

On the other hand, if a blower alone is used to increase the pressure inside a building and inflate the membrane roof during strong winds, the difference between the static pressure of the atmosphere and the static pressure inside the building increases, causing vibrations in the membrane roof. , there is a risk of compromising the safety of the device's strength.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an expansion auxiliary device for a membrane roof that can reduce the power consumption of a blower in windy conditions and suppress vibrations of the membrane roof in strong winds.

(Means for solving the problem) The present invention is an auxiliary device for inflating a membrane roof of a building having a membrane roof, which is provided on a wall of the building that communicates between the outside and the inside of the building. and a check valve disposed at the air supply port to allow air to flow from the outside to the inside of the building.

The present invention also provides an auxiliary device for inflating the membrane roof of a building having a membrane roof, comprising an air supply port provided in a wall of the building that communicates the outside and the inside of the building; A pressure stabilization chamber provided at the air supply port, and two check valves that allow air to flow from the outside to the inside of the building, one on the inlet side and the other on the outlet side of the pressure stabilization chamber. and two check valves respectively disposed in the.

(Function) When there is wind, the air having static pressure and dynamic pressure enters the interior of the building through the check valve, and the dynamic pressure is restored to static pressure, assisting the expansion of the membrane roof.

(Example) Examples of the present invention will be described below with reference to the drawings.

The inflation assist device 10 is used as an auxiliary means for inflating a membrane roof 12 of a building 14 having a membrane roof 12, as shown in FIGS.

In the illustrated example, the building 14 is a large gymnasium, with a wall 18 extending vertically from the outer periphery of the bleachers 16 and having a flexible membrane roof 12 of a device known per se attached to the upper end of the wall 18. . An air supply port 20 for a blower is provided on the wall 18, and this air supply port 20
Blower directly or through duct (not shown)
is connected. The membrane roof 12 is held in an inflated state by air drawn into the interior of the building 14 by a blower.

A plurality of air supply ports 22 are provided in the wall 18 at equal intervals around the entire circumference of the building 14 to communicate the outside and the inside of the building. A check valve 24 is disposed in the air supply port 22, and the expansion assisting device 10 is configured.
It consists of an intermediate part 28 and an outlet part 30, and an iron plate 32
surrounded by The intermediate portion 28 is formed to have a vertical cross-sectional area larger than the vertical cross-sectional areas of the inlet portion 26 and the outlet portion 30, and to have sufficient width in the horizontal direction. As a result, the velocity of the atmosphere that entered the intermediate section 28 through the inlet section 26 is significantly reduced in the intermediate section 28, the dynamic pressure is restored to static pressure, and the atmospheric pressure is stabilized. It serves as a pressure stabilization chamber. In the illustrated example, two baffle plates 34 extending in opposite directions are provided in the intermediate portion 28 to prevent the linear flow of air in the intermediate portion 28, thereby further stabilizing the pressure. At least one baffle plate is required for this purpose. A check valve 24a is disposed at the inlet section 26, which is the inlet side of the pressure stabilization chamber, and a check valve 24b is disposed at the outlet section 30, which is the outlet side.

According to the above configuration of the air supply port 22, it is possible to make the intermediate portion 28 a pressure stabilization chamber and take in air with a stable pressure into the inside of the building 14, which is most preferable. However, for the purpose of assisting the expansion of the membrane roof 12, it is not necessary to provide the intermediate portion 28 that acts as a pressure stabilization chamber in the air supply port 22. If there is no pressure stabilization chamber, one check valve 24 is installed at each air supply port 22.
It is sufficient if one is placed.

It is preferable that the installation height h of the inlet portion 26 of the air supply port 22 from the ground is set to 1/2 to 2/3 of the height H of the building 14. As a result, the inlet portion 26 of the air supply port 22
is located at the location where the dynamic pressure of the wind is greatest, making it possible to effectively utilize the dynamic pressure of the wind. Further, the vertical cross-sectional area of the inlet portion 26 of the air supply ports, the pitch between the air supply ports, etc. can be determined by taking into consideration the size and height of the building 14.

The check valve 24 allows atmospheric air to flow from the outside of the building 14 to the inside. In the illustrated example, the check valve 24
is in the form of a so-called flap valve, which is pivotally connected to the iron plate 32 of the air supply port 22 by a pin 36, and is in close contact with the valve seat 38 in the closed state, blocking the flow of air from the inside of the building 14 to the outside. .

(Effect of the embodiment) When air is taken into the building 14 by a blower, the membrane roof 12 expands, and in this state, the building 1
4 is used. At this time, air does not flow from inside the building 14 to the outside through the check valve 24.

When there is wind, the total pressure of the wind acting on the check valve 24 disposed at the inlet portion 26 of the air supply port 22, that is, the sum of dynamic pressure and static pressure, is greater than the static pressure in the intermediate portion 28 of the air supply port 22. When it becomes larger, the check valve 24 in the inlet section 26 opens and the atmosphere flows into the intermediate section 28 . In this intermediate portion, the dynamic pressure of the wind is restored to static pressure, and the pressure within the intermediate portion 28, that is, the static pressure becomes high. When the static pressure in the intermediate part 28 becomes higher than the static pressure inside the building 14, the static pressure in the intermediate part 28 is naturally higher than the total pressure outside the building 14, so as shown in FIG. The check valve 24 at the inlet section 26 of the air supply port 22 is closed, the check valve 24 at the outlet section 30 is opened, and the intermediate section 2
Air flows from 8 toward the inside of the building 14. The air flowed in this way helps the building 1.
Static pressure within the membrane roof 12 increases and assists in the expansion of the membrane roof 12.

(Effects of the Invention) According to the present invention, since the air supply port is provided in the wall of the building and the check valve is disposed in the air supply port,
When there is wind, the energy contained in the wind itself is used to draw atmospheric air into the building, increasing the static pressure inside the building and assisting the expansion of the membrane roof. the result,
It is possible to reduce the operation of the blower when there is wind, and the power consumption cost can be reduced.

In addition, during strong winds, atmospheric pressure can be brought into the building instead of or in conjunction with the air blowing by the blower to keep the fluctuating pressure difference small, and vibrations of the membrane roof can be suppressed.

[Brief explanation of drawings]

Figure 1 is a front view of a building with a membrane roof;
The figure is a cross-sectional view of the building with two auxiliary devices installed, Figure 3 is a cross-sectional view of the auxiliary device, with the two check valves closed, and Figure 4 is a cross-sectional view of the auxiliary device. The check valve on the outside of the building is closed, and the check valve on the inside is open. 10: Auxiliary equipment, 12: Membrane roof, 14: Building, 18: Wall, 22: Air supply port, 24: Check valve, 2
6: Inlet part, 28: Intermediate part (pressure stabilization chamber), 3
0: Exit part, 34: Baffle plate.

Claims (1)

[Scope of Claims] 1. An auxiliary device for inflating the membrane roof of a building having a membrane roof, the air supply port being provided in a wall of the building and communicating between the outside and the inside of the building. and a check valve disposed at the air supply port to allow air to flow from the outside to the inside of the building.
Inflation aid for membrane roofs of buildings. 2. An auxiliary device for inflating the membrane roof of a building having a membrane roof, comprising an air supply port provided in a wall of the building that communicates the outside and the inside of the building, and the air supply port. a pressure stabilization chamber provided in the building, and two check valves that allow air to flow from the outside to the inside of the building, one of which is placed on the inlet side and the other on the outlet side of the pressure stabilization chamber. An inflating device for a membrane roof of a building, comprising two check valves. 3. The expansion auxiliary device according to claim 2, wherein the installation height of the air supply port from the ground is one-half to two-thirds of the height of the building. 4. The expansion auxiliary device according to claim 2, wherein at least one baffle plate is disposed within the pressure stabilization chamber.