JPH028013Y2 - - Google Patents

Description

[Detailed explanation of the invention] This invention is applicable to reinforced concrete buildings.
The present invention relates to a fireproof drainage hole that allows water leakage from installed equipment to be drained easily and at low cost.

BACKGROUND ART Conventionally, there has been a problem in how to drain water leaking from installed equipment in reinforced concrete buildings.

If this measure were to include full-scale drain piping that penetrates the building frame wall or is buried, it is unclear whether water will leak from the installed equipment because it only occurs in emergencies and does not occur on a regular basis. This method has the disadvantage of high costs because it requires serious measures to be taken.

Therefore, as a result of studies in view of the above-mentioned drawbacks, the present invention has been developed to create a fireproof drainage hole that can easily and inexpensively drain water leakage in an emergency. A through hole surrounded by a concrete casting frame is provided, and a cylindrical portion having approximately the same thickness as the concrete floor is formed at a predetermined position at a predetermined position to protrude upward to provide a predetermined fire resistance. A molded steel plate manufactured to a certain thickness is provided, and a non-combustible, smoke-blocking packing is pasted to the lower surface of the upper opening of the cylindrical portion to form a crested cylindrical plate manufactured to a thickness that has a predetermined fire resistance. By placing a steel drain hole cover, water leakage from equipment installed in a reinforced concrete building is channeled into the through hole, and when a certain water level is reached, the fire-resistant drain hole cover is raised and opened. Since drainage channels are formed by
While maintaining a certain level of fire resistance as a fireproof compartment at all times, leakage water can be drained easily and at low cost in emergencies.

Hereinafter, one embodiment of the present invention will be described based on the drawings.

The drawing is a longitudinal sectional view of a fireproof drainage hole showing an embodiment of the present invention.

In the figure, reference numeral 1 denotes a through hole, which is provided at a corner of a concrete floor 2 surrounded by a steel casting frame 3. A steel molded plate 4 manufactured to a thickness having a predetermined fire resistance is provided at the lower end of the through hole 1. A cylindrical portion 5 having approximately the same thickness as the concrete floor 2 is formed at a predetermined position on the steel molded plate 4 so as to protrude upward.

At the upper opening of the cylindrical portion 5, a steel drainage hole cover 7 in the shape of a cylindrical capped cylinder is placed, which is manufactured to have a thickness that has a predetermined fire resistance by attaching a non-flammable smoke-shielding packing 6 to the lower surface.

As the non-combustible/smoke-proof packing 6, for example, an asbestos yarn sponge is used.

Further, the drain hole cover 7 has a capped cylindrical shape manufactured with a thickness having a predetermined fire resistance, and
Normally, it has a certain level of fire resistance as a fireproof compartment, but in an emergency, when water leaks from installed equipment and the water level inside the through hole 1 reaches a certain level, the drain hole cover 7, which has fire resistance, moves in the direction of arrow A. It rises and the lid opens,
This will form a drainage channel. When the leakage water is drained in the direction of arrow B through this drainage channel, the drain hole cover 7 is lowered and closed. Further, when the water leakage reaches a certain water level, the drain hole cover 7 rises in the direction of arrow A and opens the cover. In this way, the drain hole cover 7 is repeatedly raised and lowered, and leaked water is drained in the direction of arrow B.

As explained above, according to the present invention, a fire-resistant drainage hole is formed in a concrete floor by placing a drainage hole cover having a prescribed fire-resistance on the upper opening of a cylindrical part formed in a steel molded plate having a prescribed fire-resistance. By installing simple equipment, the fireproof compartment can maintain a certain level of fire resistance under normal conditions, while in an emergency, when water leaks and the water level reaches a certain level in the through-hole, the fire-resistant drain hole cover rises and closes. Since the drain is opened to form a drainage channel, leakage water can be drained easily and at low cost in an emergency without using full-scale drainage equipment.

[Brief explanation of the drawing]

The drawing is a longitudinal sectional view of a fireproof drainage hole showing an embodiment of the present invention. 1...Through hole, 2...Concrete floor, 3...
Steel driving frame, 4... Steel forming plate, 5... Cylindrical portion, 6... Packing, 7... Drain hole cover.

Claims (1)

[Scope of utility model registration request] A through hole surrounded by a steel pouring frame is provided at the corner of the concrete floor, and a cylindrical portion having approximately the same thickness as the concrete floor is formed at a predetermined position at the lower end of the through hole to protrude upward. A steel molded plate manufactured to a thickness having a predetermined fire resistance performance is provided, and a non-combustible smoke-blocking packing is pasted to the lower surface of the upper opening of the cylindrical part, and the plate is manufactured to a thickness having a predetermined fire resistance performance. A fire-resistant drain hole characterized by having a cylindrical steel drain hole cover placed thereon.