JP4013184B2 - Sprinkler fire extinguishing equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a sprinkler fire extinguishing equipment. More specifically, the present invention relates to a sprinkler fire extinguishing equipment that prevents a flame or a hot air stream from flowing into the ceiling through an opening for ventilation in the event of a fire.
[0002]
[Prior art]
In recent years, system ceilings are used in high-rise buildings and the like. In this system ceiling, a lightweight ceiling material installed at a predetermined interval is suspended from a ceiling slab by suspension fittings, and the ceiling surface material is locked between these lightweight ceiling materials to construct the ceiling.
[0003]
In this system ceiling, the lightweight ceiling material consists of T-bars, that is, bars with a T-shaped cross section, and a pair of T-bars is installed so that the lighting fixtures can be installed with the space between the T-bars being narrowed in some places. It is constructed side by side. This pair of T-bars supports one of the flanges of the T-bar and supports the ceiling surface material and the lighting fixture, and the other flange is disposed in a butted state. An opening for ventilation, that is, a slit is formed, and indoor air is sucked and exhausted from the slit.
[0004]
Conventional spring fire extinguishing equipment is installed on the ceiling of this system, installed above the ceiling surface material, and attached to the other end of the unwinding pipe with a metal unwinding pipe with one end connected to the water supply main A sprinkler head provided protruding from an attachment hole formed in the ceiling surface material, ventilation means provided on the upper surface side of the ceiling surface material, and provided substantially in the same plane as the ceiling surface material, And a slit as a ventilation opening through which air is taken in and out.
[0005]
[Problems to be solved by the invention]
In recent years, it has been considered to use a resin pipe (hereinafter referred to as a resin pipe) for the unwinding pipe. In this case, when a resin pipe is disposed over the slit and a fire occurs near the slit, a fire or a high-temperature hot air current is sucked from the slit, and the resin pipe is directly exposed to the fire, or hot air Heated by the flow. Then, it is considered that the resin pipe not only bursts or burns and leaks fire-extinguishing water but also cannot supply fire-extinguishing water to the sprinkler head.
In addition, when the fire or hot airflow flows into the back of the ceiling, the fire extinguishing equipment on the back of the ceiling may be heated and damaged or burned.
[0006]
In view of the above circumstances, an object of the present invention is to prevent damage to resin pipes and other fire extinguishing equipment on the back of the ceiling.
[0007]
[Means for Solving the Problems]
This invention is provided with an opening for ventilation provided on the ceiling board, a resin pipe installed on the upper surface side of the ceiling board, one end connected to the water supply main, and the other end of the resin pipe, a sprinkler head that protrudes from the mounting hole formed in the ceiling panel, said a fire detector provided on the lower surface of the ceiling plate, provided on the upper surface side of the ceiling plate, balloon or the ceiling backside Ventilation means communicating with the room through the ventilation opening by sucking from the ceiling , and the ventilation means normally sucks indoor air and discharges it outside. When the fire detector detects a fire, the ventilation means is switched to a ventilation emergency operation that blows air into the room, and the sprinkler head is opened and fire-extinguishing water is discharged. Provided a control means for switching the air means to said ventilation normal operation, the ventilation means is a fire, until the sprinkler head to work, characterized in that pressurizing the ceiling back.
[0008]
In the present invention, a water flow detection device is provided on the base end side of the water supply main, and when the fire detector detects a fire, the control means reversely rotates the fan of the ventilation means, and the water flow detection device operates. when the features a Rukoto rotated forward the fan.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
In order to achieve the object of the present invention, the present inventor has realized that it is only necessary to prevent indoor air from flowing out of the room through the opening for ventilation in the event of a fire.
Therefore, a sealing means such as an air sealing means is provided on the back of the ceiling, and the opening is ventilated and closed using the air sealing means in the event of a fire.
When the ventilation means of the existing sprinkler fire extinguishing equipment is used as the air seal means, a control means for switching between the ventilation normal operation and the ventilation emergency operation of the ventilation means is provided.
[0010]
As a sealing means, an air supply means for air sealing may be newly provided without using this ventilation means. When operating this air supply means, the operation of the ventilation means is stopped.
[0011]
This normal ventilation operation is performed until the fire detector is activated, and thereafter the operation is switched to the emergency ventilation operation. This control means may be linked to the fire detector, and when the fire detector detects a fire, it may be switched to an emergency operation for ventilation.
A running water detection device may be provided in the water supply pipe of the sprinkler head, and the running water detection device may be connected to the control means so that the operation is switched to the normal ventilation operation when the running water detection device detects the running water.
[0012]
【Example】
An embodiment of the present invention will be described with reference to FIGS. A ceiling surface material 2 is stretched under the ceiling slab 1. This ceiling surface material 2 is held by a lightweight ceiling material 5 such as a T-bar. The ceiling surface material 2 is provided with a mounting hole 2 a and a slit 6 for the sprinkler head 23. The slit 6 is an opening for ventilation, and is formed between a pair of lightweight ceiling materials 5a and 5b provided side by side.
[0013]
A water supply pipe 11 fixed by a hanging metal fitting is provided on the upper surface side of the ceiling surface material 2. The water supply pipe 11 includes a flowing water detection device 40 and a T-shaped branch pipe 12 having a connection port 13. It is arranged. The flowing water detection device 40 is connected to a control panel 45. The connection port 13 is connected to the connection port 15 of the header 14 via a connection pipe 17. The header 14 is provided with a plurality of discharge ports 16a to 16c.
[0014]
Connection ports 22 a and 22 b are provided at both ends of the elbow 21, and the elbow 21 is fixed to the channel 7 by a fixing metal 8.
[0015]
A joint portion 32 at one end of the resin pipe 31 is connected to the connection port 22 a of the elbow 21, and the discharge port 16 a of the header 14 is connected to the joint portion 32 at the other end. The resin tube 31 may be housed in a bellows-like or spiral sheath, for example, to have a double structure.
[0016]
The resin tube 31 is disposed across the slit 6, and T bars 5 a and 5 b are provided at portions corresponding to the slit 6.
[0017]
A ventilation means 55 is disposed on the upper surface side of the ceiling member 2.
The ventilation means 55 includes a plurality of terminal ducts 56 arranged in parallel, a fan 58 coupled to the terminal duct 56 via a normally open damper 57, and a constant connection connected to an outlet 58a of the fan 58. An open damper 60, a bypass circuit 62 connecting the outlet 58 a of the fan 58 and the inlet 57 a of the damper 57, and an outside air introduction pipe 64 connected between the fan 58 and the damper 57. Yes. The bypass circuit 62 and the outside air introduction pipe 64 are provided with normally closed dampers 65 and 66. The motor M and the fan 58 of each damper 57, 60, 64, 66 are connected to the control panel 45.
[0018]
A fire detector 50 is provided on the lower surface of the ceiling member 2. The fire detector 50 is connected to the control panel 45.
[0019]
Next, the operation of this embodiment will be described.
Normally, the control panel 45 sets the ventilation means 55 to the normal ventilation operation, sucks the air 70A in the room 70, and discharges it outside (S ₁ ).
At this time, the dampers 57 and 60 are open, the dampers 65 and 66 are closed, and air 70A is sucked from the terminal duct 56 by the forward rotation of the fan 58, and is exhausted to the outside through the dampers 57 and 60. The ceiling 80 is depressurized to a negative static pressure.
Therefore, the air 70 </ b> A in the room 70 flows through the opening 6 to the ceiling 80 and is sucked into the terminal duct 56.
[0020]
The fire detector 50 always monitors a fire (S ₂ ). When the sensor 50 detects a fire, it sends a fire signal to the control panel 45.
The control panel 45 switches the ventilation means 55 to a ventilation emergency operation, reversely rotates the fan 58 (S ₃ ), sucks the outside air 70 B into the terminal duct, and blows out the outside air 70 B into the room 70 (S ₄ ).
[0021]
At this time, the dampers 57 and 60 are open, the dampers 65 and 66 are closed, and the outdoor air 70B is blown out from the terminal duct 56 by the reverse rotation of the fan 58. Pressure.
Therefore, the air 70 </ b> B in the ceiling back 80 flows into the room 70 through the opening 6, so that a fire or thermal air current in the room 70 does not flow out from the opening 6 to the ceiling back side. That is, the opening 6 is in an air-sealed state so that a fire and a hot air current do not flow out.
[0022]
Open sprinkler head 23, the extinguishing water is released, because the inside of the water supply pipe 11 flows extinguishing water, water flow detection device 40 is actuated, and sends a water flow detection signal to the control panel 45 (S _5).
[0023]
The control panel 45 switches to the normal ventilation operation and rotates the fan 58 forward (S ₆ ). That is, the opening 6 is air-sealed only from when the fire detector 50 detects a fire until the water flow detection device 40 detects the water flow.
[0024]
In the case of the ventilation emergency operation, the fan 58 is rotated in the reverse direction to supply air into the room 70. However, the fan 58 is rotated forward, the dampers 57 and 60 are closed, the dampers 65 and 66 are opened, and the bypass circuit 62 is opened. The air may be supplied to the room 70 via
[0025]
The embodiment of the present invention is not limited to the above. For example, a sealing means such as an air sealing means may be provided separately from the ventilation means.
As this air seal means, an air supply means for air seal is provided. When this air supply means is used, the operation of the ventilation means is stopped, and air is supplied along the ceiling plate so that the opening is closed by ventilation to form an air seal. This air supply means is connected to the control means of the ventilation means and is controlled by the control means.
[0026]
【The invention's effect】
Since the present invention is configured as described above, the following effects can be obtained.
(1) Since the sealing means for ventilating and closing the opening for ventilation is provided, the opening can be ventilated and closed by the sealing means in the event of a fire. Therefore, it is possible to prevent indoor fire and hot airflow from flowing out to the back of the ceiling, and thus it is possible to prevent damage and combustion of fire extinguishing equipment such as resin pipes.
[0027]
(2) Ventilation means ventilation control means to switch between normal operation and ventilation emergency operation, switch to ventilation emergency operation of the ventilation means in case of fire, and blow external air into the room through the opening be able to. Therefore, it is possible to prevent indoor fire and hot airflow from flowing out to the back of the ceiling, and thus it is possible to prevent damage and combustion of fire extinguishing equipment such as resin pipes.
[0028]
(3) Since the control means for controlling the fire detector and the ventilation means is provided, when the fire detector detects a fire, the ventilation means is automatically controlled to blow air into the room.
[0029]
(4) Since the control means for controlling the flowing water detection device and the ventilation means is provided, when the sprinkler head operates and the flowing water detection apparatus detects flowing water, the ventilation means automatically switches to the exhaust drive and exhausts.
Therefore, the indoor smoke generated by the fire can be discharged smoothly. Note that if the sprinkler head operates, the fire can be silenced, so there is no problem in protecting the resin pipe.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view showing an embodiment of the present invention.
FIG. 2 is a diagram showing ventilation means.
FIG. 3 is a diagram showing an operation state during normal ventilation.
FIG. 4 is a diagram showing an operation state in a ventilation emergency.
FIG. 5 is a flowchart of ventilation means.
[Explanation of symbols]
6 Ventilation opening 23 Sprinkler head 31 Resin pipe 40 Flowing water detection device 45 Control panel 55 Ventilation means 70 Indoor 80 Back of ceiling

Claims (2)

A ventilation opening provided in the ceiling plate, a resin pipe installed on the upper surface side of the ceiling plate, one end connected to the water supply main, and the other end of the resin tube are attached to the ceiling plate. A sprinkler head that protrudes from the formed mounting hole, a fire detector that is provided on the lower surface side of the ceiling plate, and a blower that is provided on the upper surface side of the ceiling plate and that blows out or sucks from the ceiling. And a ventilation means communicating with the room through the opening for ventilation , wherein the ventilation means is a sprinkler fire extinguishing equipment that normally performs a ventilation normal operation of sucking indoor air and discharging it to the outside. ;
When the fire detector detects a fire, the ventilation means is switched to a ventilation emergency operation for blowing out air into the room, and when the sprinkler head is opened and fire-extinguishing water is discharged, the ventilation means is set to the normal ventilation. Provide control means to switch to operation,
It said ventilation means is a fire, until the sprinkler head to work, sprinkler fire extinguishing equipment, characterized in that pressurizing the ceiling back. A water flow detection device is provided on the proximal end side of the water supply main, and when the fire detector detects a fire, the control unit reversely rotates the fan of the ventilation unit, and the water flow detection device operates. 2. The sprinkler fire extinguishing equipment according to claim 1, wherein the fan is rotated forward.

Images