JPS5942320Y2 - Pressurized room water drain device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a water drain device in a pressurized room that is under high pressure relative to the outside pressure, such as the cabin of an aircraft.

When installing a drain hole in a pressurized room such as the cabin of an aircraft, install a valve on the drain hole to prevent internal pressure from leaking through the drain hole by closing the valve during pressurization. Therefore, it is necessary to open the valve to drain the water only when the water is not pressurized, that is, at an altitude where the outside pressure is approximately 1 atmosphere in the case of an aircraft.

As shown in Figure 1, the conventional water drain device attaches a rubber valve A to the tip of a leaf spring B.
The base of the leaf spring B is screwed to the frame C via a bracket D, etc., and in a natural state, the valve A faces the inside of the drain hole F provided in the bottom E of the pressurized chamber with a predetermined gap G. When pressurization begins, the indoor air flows out through the gap G and from the drain hole F as shown by the arrow, and the venturi effect due to the velocity of the air flow through the gap G causes the valve A to close to the leaf spring B. It sticks to the water drain hole F against the spring force and stops the leakage of indoor air, and when the pressure difference between the inside and outside becomes very small, the spring force of the leaf spring B lifts the valve A as shown in the figure and drains the water. Hole F
It is normal for the door to open to drain water from the room.

However, this type of conventional structure has a large number of parts, is heavy, and is difficult to set the positional relationship between the rubber valve A and the drain hole F, and cannot be opened or closed unless the gap G is properly set. If the operation is not performed properly, and if the centers of valve A and drain hole F do not match when closing, a complete seal will not be achieved, so it takes a lot of time to install and adjust valve A, leaf spring B, etc. It has drawbacks such as the

Further, in the conventional structure, since the valve A is supported by the frame C, there are problems such as restrictions on the installation location of the drain hole F.

The present invention provides a water drain device for a pressurized chamber that can overcome all the above-mentioned conventional drawbacks.

That is, in the present invention, as shown in FIGS. 2 and 3, a molded rubber having a valve portion 11 in the center and integrally connecting the mounting portions 12 formed on both sides and the valve portion 11 with a connecting portion 13 is used. As shown in FIG. 12 is fixedly attached to the pressurized chamber wall 2 by adhesive or other means.

As shown in FIG.
30 elasticity keeps the valve part 11 facing the inside of the drain hole 3 with a predetermined gap, but when pressurization starts and the room air flows out from the drain hole 3 as shown by the arrow in Figure 3, The lower part of the valve part 11 becomes negative pressure due to the flow velocity, and the valve part 11 elastically deforms the connecting part 13 and sticks to the drain hole 3, thereby closing the drain hole 3 as shown in FIG.

In this state, the positive force within the pressurized chamber acts in the direction shown by the arrow in FIG. 4 to push the valve portion 11 into the drain hole 3, thereby maintaining a completely airtight state.

When the pressure difference between the inside and outside is almost eliminated, the valve part 11 moves upward due to the restoring force of the connecting part 131 and returns to the state shown in FIG. 3, and water is drained from the drain hole 3.

As described above, according to the present invention, a molded rubber molded product having a shape in which a valve is formed in the center, and the mounting parts formed at both ends and the valve part are integrally connected by connecting parts having a predetermined elasticity. Using a valve member, connect and fix the valve member to the pressurized chamber wall by means such as gluing so that the valve member straddles the drain hole provided in the pressurized chamber wall and the valve portion faces the inside of the drain hole. By adopting this structure, the only required part is the above-mentioned rubber pulp member, so the number of parts and weight can be significantly reduced compared to the conventional structure. Since it is simply glued to the pressure chamber wall, the number of installation steps is significantly reduced, leading to significant cost reductions, and there are no restrictions on the installation location of the drain hole, and no special adjustment work is required. It can bring many benefits, such as the accurate sealing of the pressurized chamber and the opening of the drain hole when the pressurization is lost, and it is particularly effective in practical use as a water drain device in aircraft. It is something.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing a conventional structure, FIG. 2 is a plan view showing -fIl of a valve member according to the present invention, FIGS. The figure shows the state before pressurization, and FIG. 4 shows the state during pressurization. 1... Valve member, 2... Pressurized chamber wall, 3... Drain hole, 11... Valve part, 12...・Mounting part, 13...Connecting part.

Claims (1)

[Scope of utility model registration request] A molded rubber valve member is formed with a valve part formed in the center, and the mounting parts formed on both sides and the valve parts are integrally connected to the connecting part, and a water drain hole provided in the pressurized chamber wall is used. A water drain device for a pressurized chamber, characterized in that the mounting portion is bonded and fixed to a wall of the pressurized chamber by adhesive or other means and attached to a plate so that the valve portion faces the inside of the water drain hole.