JPH09228438A - Floor drain trap for gas-extinguishing chamber - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent leakage of gas from a drain opening on discharging gas and secure a specified extinguishing capacity, in a drain trap which can drain in an emergency, installed on a floor of a chamber as a gas-extinguishing objective. SOLUTION: A drain opening 8 is arranged at a higher position than the bottom 2a of a easing 2 embedded in a floor. A shaft 11 is fixed at the center of the drain opening 8. An insulation sleeper 12 floating on water is provided so as to be verticaly movable along the guide shaft 11. At an emergent draining case, the insulation sleeper 12 is set afloat and the drain opening 8 is opened. When discharging gas, the sleeper is pressed by the increased pressure of the gas and hence, the drain opening 8 is closed airtight to prevent the gas from leaking out.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas fire extinguishing room floor drain trap installed on the floor of a room to be extinguished by Iwayuru Gas, which extinguishes the fire using a fire extinguishing gas such as carbon dioxide gas or halogen gas. In particular, the present invention relates to a drain trap suitable for cases where it is necessary to secure drainage properties during emergency drainage.

[0002]

2. Description of the Related Art Water does not always flow to a room in which computers and communication devices are installed, other rooms in which air conditioners and boilers are installed, and floors in warehouses. In case of water leakage due to pipe rupture or water leakage due to contact damage, etc., or when there is rupture water leakage due to corrosion of pipes, coils, etc. Has been. A drain trap is provided between each drain and the drain pipe, but the drain trap used for conventional floor drains in this type of computer room is basically a sealed trap. General pipe traps and floor drain traps that use water, valve traps that open when water flows in using a balancer (weight), and sealed water trap destination (drainage destination) There is a ball trap or the like configured to be blocked by a ball, and when the water flows in, the ball is lifted by the pressure of the water.

[0003]

However, although the pipe trap in the above-mentioned conventional drain trap has a good drainage property, it is not preferable from the viewpoint of constantly flowing humid air and maintenance. Although the floor drain trap is easy to maintain, it was not satisfactory in terms of workability and cost. Moreover, since all of these are traps that use sealed water, they do not function as traps when water evaporates and is exhausted. In addition, valve traps and ball traps using balancers had some points to be improved in terms of drainage in an emergency.

A common problem with each of these existing drain traps is the point of gas leakage during gas fire extinguishing. That is, the fire extinguishing equipment in the room where the computer and the communication equipment are installed, as described above, uses carbon dioxide gas or halogen gas, which is less likely to cause damage to the equipment due to release and has excellent insulation properties and has a rapid effect on oil fires. Although gas fire extinguishing equipment is used, for example, when using carbon dioxide gas, in order to obtain a satisfactory fire extinguishing ability, when releasing it, make the room airtight against a pressure increase (0.45kg / cm ² ) Need to keep.
In this respect, in each of the conventional drain traps described above, the drainage port is not sufficiently closed, and there is a gas leak, which causes a decrease in fire extinguishing ability. That is, in the trap using the sealing water, there is a possibility that the sealing water may be broken by the pressure increase at the time of releasing the gas. Also, in the valve trap using the balancer, the valve opens due to the pressure increase at the time of gas release, and the gas leaks. Also in the case of the ball trap, there is a problem that the ball floats up due to the pressure increase at the time of releasing the gas, and eventually the gas leaks.

The present invention has been made in view of the above point, and it is possible to prevent the inflow of humid air while ensuring drainage in an emergency, and at the same time, maintainability and workability are good, and gas is released. It is an object of the present invention to provide a floor drain trap for a gas fire extinguishing room, which prevents the leakage of the gas and prevents the deterioration of the fire extinguishing ability, and solves the above problem.

[0006]

According to a first aspect of the present invention, there is provided a drain trap installed on a floor of a chamber to be extinguished by gas, wherein an upper surface embedded in the floor is a trap. An open casing, a drain port located in the casing and located at a position higher than the bottom of the casing, a float that can open and close the drain port, and a guide member provided in the casing, A floor drain trap for a gas fire extinguishing chamber, wherein the float moves up and down along a guide member to open and close the drain port.

In the floor drain trap for a gas fire extinguisher according to the first aspect of the present invention, the float closes the drain port in the normal state, that is, when not draining (when water does not flow into the casing). It is possible to prevent humid air and other odors from entering the room due to the chimney effect from the drainage discharge destination, for example, a spring tank. When underfloor air conditioning is implemented, the airtightness under the floor can be maintained.

When the gas is extinguished, the extinguishing gas is released into the room and the pressure in the room rises.
The float is pressed toward the drain port side, and good airtightness is obtained. Therefore, the fire extinguishing gas is prevented from leaking from the drain port, and the desired fire extinguishing ability can be sufficiently ensured.

On the other hand, at the time of emergency drainage, when water flows into the casing, the float immediately floats and rises along the guide member, and the drainage port is opened. Therefore, good drainage can be immediately obtained and emergency drainage can be dealt with.

The guide member of the drainage trap for a gas fire extinguisher according to claim 1 is provided in a casing. For example, as described in claim 2, a shaft member fixed to the center of the drainage port is provided. It may be something like this.
If such a shaft member is used, the smooth vertical movement of the float can be ensured with a small number of members.

If a stopper is provided above the float as described in claim 3, it is possible to prevent the float from coming off from above the guide member and coming off when a large amount of water flows into the casing. .

By the way, the drain from the air conditioner is generally discharged from the drain horizontal draw pipe through the drain vertical pipe, but if there is an air conditioner in the room where the gas fire is extinguished, the drain horizontal draw pipe and the drain vertical pipe are provided. Fire extinguishing gas leaks to the drain discharge destination through the pipe, and the fire extinguishing ability is reduced. In this point, if the air-conditioning drain horizontal draw pipe is connected to the casing as in claim 4, the ordinary drain is discharged into the casing, and when it is accumulated to some extent and the float rises due to buoyancy, it is discharged from the drain port. It When extinguishing the gas, as described above, since the drain port is airtightly closed by the float pressed by the pressure increase, the airtightness of the room can be secured. Therefore, the expected fire extinguishing ability does not decrease. Moreover, the conventional vertical pipe for drainage is no longer required.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows a building B in which a floor drain trap for a gas fire extinguisher according to the present embodiment is installed in a predetermined gas fire extinguisher. The rooms to be extinguished of gas in the building B are the communication system air conditioning machine rooms R21 to R44 on the second to fourth floors. Each of these communication system air conditioning machine rooms R21 ~
Nozzles N21 to N44 for ejecting carbon dioxide gas into the room when a fire occurs are installed in the R44 corresponding to each room. And the floor drain trap 1 for gas fire extinguishing room according to the present embodiment
Is installed on the floor of each of the communication system air conditioning machine rooms R21 to R44.

The gas fire extinguishing room floor drain traps 1 installed in each of the communication system air conditioning machine rooms R21 to R44 have the same structure, and the details thereof will be described with reference to FIG. 2 is a vertical cross section of the floor drain trap 1 for gas fire extinguisher, and FIG. 3 is
2 is a cross-sectional view taken along the line AA of FIG. 2, in which a substantially cylindrical casing 2 having an open upper surface is installed in a predetermined through hole formed in the slab 3, and a bottom portion 2a thereof is formed from the lower surface of the slab 3. It is protruding. The casing 2 is made of, for example, a so-called white gas pipe made of galvanized carbon steel pipe for piping, and has a size of 150A.

Further, the casing 2 is in the form of being embedded in the slab 3, but the upper portion 2b thereof is provided with the slab 3
It is located between the tapered portion 3a formed on the upper surface, that is, the floor surface, and the through hole in which the casing 2 is installed, and a thread groove is formed on the outer periphery thereof. A support body 5 for supporting the floor drainage fitting 4 at the locking step portion 5a is screwed into this thread groove.

A drainage pipe 7 connected to a drainage main pipe 6 which is vertically piped as shown in FIG. 1 is penetratingly connected to a bottom portion 2a of the casing 2, and a drainage port 8 has a bottom portion 2a in the casing 2. It is set higher than. The material of the drainage pipe 7 is a so-called white gas pipe, like the casing 2, and the size thereof is 100A.

The upper portion of the drain pipe 7, that is, the drain port 8
An appropriate bracket 9 is fixed to the inner periphery in the vicinity of, and a long nut 10 is further fixed to the bracket 9 such that its screw hole is located vertically and at the center of the drainage port 8. The lower end of the shaft 11 having screw grooves formed at both ends that will form a guide member is screwed into the screw hole of the long nut 10.

An insulation sleeper 12 having an outer diameter larger than the outer diameter of the drainage port 8 is provided around the shaft 11 so as to be vertically movable along the shaft 11. That is, a hole 12a having a diameter larger than the diameter of the shaft 11 is formed in the center of the insulation sleeper 12, and the shaft 12 is passed through the hole 12a so that the insulation sleeper 12 can
It is provided around 1.

The insulation sleeper 12 constitutes a float. Therefore, the material needs to have a specific gravity of less than 1.0, and preferably has super flame retardancy and elasticity. The insulation sleeper 12 used in this embodiment is made of, for example, a rigid urethane foam having a specific gravity of 0.3. Of course, the invention is not limited to this, and a non-combustible or flame-retardant material having a small specific gravity, for example, a flame-retardant polystyrene foam can be used. This insulation sleeper 12 has good adhesion to the peripheral portion of the drainage port 8, and its outer diameter is 120φ. Therefore, in the normal state, as shown in FIG. 2, the insulation sleeper 12 is placed on the peripheral portion of the drainage port 8 by its own weight and closes the drainage port 8.

Nuts 13 and 14 having an outer diameter larger than that of the hole 12a are screwed into the thread groove on the upper end of the shaft 11. Therefore, the insulation sleeper 1
2 does not come off from the upper end of the shaft 11.

The floor drain trap 1 for a gas fire extinguishing room according to the present embodiment has the above-mentioned structure. In the normal state, the insulation sleeper 12 is mounted on the peripheral portion of the drain port 8 as shown in FIG. The drainage port 8 is closed by its own weight. Therefore, humid air, odor, and the like from the discharge destination on the downstream side of the main drain pipe 6 will not enter the room.

When, for some reason, water is discharged into the room and flows along the floor surface into the floor drain trap 1 for the gas fire extinguishing room, the water is discharged from the floor drain fitting 4.
To flow into the casing 2. Then, the inflowing water collects from the bottom portion 2a of the casing 2. However, as shown in FIG. 5, when the water surface rises, the insulation sleeper 12, which is the float, rises along the shaft 11. As a result, the drainage port 8 is opened and opened. Therefore, the casing 2
The water that has flowed in is discharged from the drain port 8 to the discharge destination via the drain pipe 7 and the drain main pipe 6.

In the case of the emergency drainage, since the drainage port 8 is set at a position higher than the bottom portion 2a of the casing 2, no matter how water flows in, the insulation sleeper 12 is pressed by the water pressure. There is no risk of closing the drainage port 8. Further, as described above, the drainage port 8 can be closed well by its own weight in the normal state. In addition, in order to further improve the releasing property of the drainage port 8 when water flows in, the outer diameter of the insulation sleeper 12 may be set larger than the outer diameter of the drainage pipe 7. Then, the backflow that occurs when the water that flows in vigorously collides with the bottom portion 2a of the casing 2 pushes up the peripheral edge portion of the insulation sleeper 12 protruding outward from the peripheral edge portion of the drainage port 8 from below,
Immediately, the insulation sleeper 12 rises and the closing of the drainage port 8 is released.

As shown in FIG. 5, even if the water surface in the casing 2 rises and the insulation sleeper 12 rises, the nuts 13 and 14 prevent the detachment of the water. Even if it flows in, the insulation sleeper 12 is not lost or washed away.

Further, in a normal state (state of FIG. 2), when a fire occurs and carbon dioxide gas is discharged from the nozzles N21 to N44 into each room, the pressure rises at that time, so that the room becomes a positive pressure, as shown in FIG. Insulation Sleeper 1
2 is pushed to the drain port 8 side. As a result, the adhesion between the insulation sleeper 12 and the peripheral portion of the drain port 8 is enhanced, and carbon dioxide gas can be prevented from leaking from the drain port 8 to the drain pipe 7. Therefore, the expected fire extinguishing ability can be secured.

The insulation sleeper 12 can be easily removed from the shaft 11 by removing the nuts 13 and 14, and the shaft 11 itself can also be easily removed, so that the casing 2 and the drain pipe 7 can be cleaned.
Easy maintenance and installation sleeper 1
Exchange of 2 can be done quickly. Therefore, the maintainability is also good.

Structurally, the bracket 9 to which the long nut 10 is fixed is fixed to the drain pipe 7, the shaft 11 is screwed to the long nut 10, and the insulation sleeper 12 is loosely inserted into the shaft 11. Therefore, the construction is easy and the cost is low.

If a drain horizontal pipe for discharging the drain of the air conditioner is connected to the casing 2, it is possible to prevent the gas from leaking from the air conditioning drain pipe when the gas is extinguished, and further to improve the extinguishing ability. We can make every effort. For example, as shown in FIG. 7, the drain from the drain pipe 21 of the air conditioner is received by the drainage receiving portion 22 formed once in the slab 3, and the drainage lateral portion communicating with the casing 2 is provided at the bottom of the drainage receiving portion 22. The drawing tube 23 is connected. Then, the drain from the drain pipe 21 is transferred into the casing 2 through the drainage receiving portion 22 or the drain horizontal draw pipe 23. Therefore, the conventional vertical drainage pipe 24 dedicated to the drain shown by the broken line is not necessary, and the gas does not leak from the drain pipe to the drain discharge destination when the gas is discharged. Since the vertical drain pipe 24 dedicated to the drain can be eliminated, it is possible to reduce the number of piping works.

In the above embodiment, the shaft 11
In the above, the bracket 9 to which the long nut 10 is fixed is fixed to the drain pipe 7, but an appropriate bracket or shaft may be directly attached to the casing 2. Although the shaft 11 is used as the guide member, the guide member is not limited to such a shaft as long as the insulation sleeper 12 moves up and down. Further, if the bracket is also configured to be removable, the maintainability is further improved.

[0030]

EFFECTS OF THE INVENTION According to the floor drain trap for gas fire extinguisher according to claims 1 to 4, it is possible to prevent humid air and other odors from the drainage discharge destination from entering the room, and to perform underfloor air conditioning. If it is implemented, the airtightness under the floor can be maintained. When the gas is extinguished, the extinguishing gas is prevented from leaking, so that the extinguishing ability does not decrease. Of course, the drainage during emergency drainage is also good. In addition, even if the structure is simple, the number of used members is small, so that the construction is easy and the cost is low. Further, the float can be replaced and the inside of the casing can be easily cleaned, so that the maintainability is good.

Particularly, according to the floor fire drain trap for a gas fire extinguisher of the second aspect, the structure is further simplified and the float can be moved up and down smoothly. Further, according to the third aspect, it is possible to prevent the float from coming off the guide member. In the floor fire trap for gas fire extinguisher according to the fourth aspect, gas leak from the drain pipe can be prevented, and the vertical drain pipe is not required.

[Brief description of drawings]

FIG. 1 is an explanatory view of a building having a room in which a floor drain trap for a gas fire extinguishing room according to an embodiment is installed.

FIG. 2 is a vertical cross-sectional view of a floor drain trap for a gas fire extinguisher according to an embodiment.

FIG. 3 is a sectional view taken along line AA of FIG. 1;

FIG. 4 is a perspective view showing the inside of the casing of the floor drain trap for gas fire extinguisher of FIG.

5 is a vertical cross-sectional view showing a state of the floor drain trap for a gas fire extinguisher in FIG. 2 during emergency drainage.

FIG. 6 is a vertical cross-sectional view showing the state of the floor drain trap for a gas fire extinguishing room of FIG. 2 during gas fire extinguishing.

7 is a vertical cross-sectional view showing a state in which a horizontal drain pipe is connected to the casing of the floor drain trap for a gas fire extinguisher shown in FIG.

[Explanation of symbols]

 1 Gas Fire Extinguisher Floor Drain Trap 2 Casing 2a Bottom 3 Slab 6 Drain Main Pipe 7 Drain Pipe 8 Drainage Port 10 Long Nut 11 Shaft 12 Installation Sleeper 13, 14 Nut 23 Drain Horizontal Draw Pipe N21 ~ N44 Nozzle R21 ~ R44 Communication System Air conditioning machine room

Claims (4)

[Claims] 1. A drain trap installed on the floor of a chamber to be extinguished by gas, wherein the casing is embedded in the floor and has an open upper surface, and the casing is located in the casing and includes a bottom portion of the casing. Also has a drain port at a higher position, a float that can open and close the drain port, and a guide member provided in the casing, and the float moves up and down along the guide member to remove the drain port. A floor drain trap for a gas fire extinguisher, which can be opened and closed. 2. The floor drain trap for a gas fire extinguisher according to claim 1, wherein the guide member is a shaft member fixed to the center of the drainage port. 3. A stopper is provided above the float of the guide member.
Alternatively, the floor drain trap for a gas fire extinguisher according to item 2. 4. The floor drain trap for a gas fire extinguishing chamber according to claim 1, 2 or 3, wherein the air-conditioning drain horizontal draw pipe is connected to the casing.