JPH028012Y2 - - 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 be implemented as a full-scale drain piping that penetrates the building frame wall or is buried, it is unclear whether or not 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 driving frame is provided, a hole is formed at a predetermined position at the lower end of the through hole, and a fire resistant valve seat is attached to the upper surface of the hole edge. Manufactured with a thickness that has a predetermined fire resistance performance. A steel ball floating valve manufactured with a thickness having a predetermined fire resistance is placed on the valve seat, and a punch-through prevention lid is attached to the upper part of the through hole via a perforated plate holder. By installing a dual-purpose drainage perforation plate, water leaking from equipment installed in a reinforced concrete building is channeled through the drainage perforation into the through hole, and when a certain water level is reached, a fire-resistant floating valve is raised and the valve is removed. Since a drainage channel is formed by opening, a certain level of fire resistance performance as a fireproof compartment is always ensured, while leakage water can be drained easily and at low cost in an emergency.

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 plate 4 manufactured to a thickness having a predetermined fire resistance is provided at the lower end of the through hole 1.

A hole 5 is formed in the steel plate 4 at a predetermined position, a valve seat 6 is attached to the upper surface of the hole edge, and the valve seat 6 is manufactured to have a thickness that has a predetermined fire resistance. A floating valve 7 is mounted.

The valve seat 6 is made of a non-combustible and smoke-blocking material, such as asbestos sponge. The floating valve 7 has a hollow spherical shape made of steel and has a predetermined fire resistance, and normally has a certain fire resistance as a fireproof compartment, but in an emergency, the inside of the through hole 1 may leak due to water leakage from installed equipment. When the water level reaches a certain level, the fire-resistant floating valve 7 rises and opens, forming a drainage channel. When the leakage water is drained through this drainage channel, the floating valve 7 descends and closes the valve. Further, when the water leakage reaches a certain water level, the floating valve 7 rises and opens the valve. In this way, the floating valve 7 is repeatedly raised and lowered, and the leaked water is drained.

At the top of the through hole 1, a drainage perforation plate 9 which also serves as a punch-through prevention lid is placed via a perforation plate holder 8.

As explained above, according to the present invention, a floating valve having a predetermined fire resistance is placed on a valve seat provided on a steel plate having a predetermined fire resistance, and a fire-resistant drainage hole is provided in a concrete floor. By providing this equipment, a certain level of fire resistance as a fireproof compartment is ensured under normal conditions, while in an emergency, when the water level in the through hole reaches a certain level due to water leakage, the floating valve 7, which has fire resistance, rises and opens. Since a drainage channel is formed, 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 plate, 5... Hole, 6...
Valve seat, 7...Floating valve, 8...Perforated plate holder, 9...Drainage plate.

Claims (1)

[Scope of utility model registration request] A through hole surrounded by a steel casting frame is provided at the corner of the concrete floor, a hole is formed at a predetermined position at the lower end of the through hole, and a fire-resistant valve seat is attached to the upper surface of the hole edge. A steel plate manufactured to a thickness that has fire resistance is provided, a steel ball floating valve manufactured to a thickness that has a predetermined fire resistance is placed on the valve seat, and a perforated plate is provided at the top of the through hole. A fire-resistant drainage hole characterized in that a drainage eye plate which also serves as a punch-through prevention lid is placed through a receiver.