JP5090839B2 - High expansion foam fire extinguishing equipment - Google Patents

Description

  The present invention relates to a high expansion foam fire extinguishing equipment used in a cabin, a hold, or the like.

  Conventionally, a high-expansion foam extinguishing equipment has a predetermined foaming ratio secured by foaming by applying a foam aqueous solution radiated from the foaming nozzle to a foaming net while taking in a large amount of air from the upstream side of the foaming nozzle. (For example, refer to Patent Document 1).

  This foam fire extinguishing equipment includes a low foam fire extinguishing equipment and a high foaming (high expansion foam) fire extinguishing equipment. However, the foaming ratios of the two fire extinguishing equipments are different. The expansion ratio of the high expansion foam fire extinguishing equipment is 80 times or more and less than 10,000 times.

  As the foaming method of the equipment, a flow nozzle is provided with a foam nozzle and a foaming net, the pressure of the foam nozzle is set to a certain level or more, and the flow path is caused by the negative pressure generated when the foam aqueous solution is discharged from the foam nozzle. A method of absorbing indoor air in the cylinder (referred to as “aspirator type”), a method of pressure-feeding indoor air into the flow path cylinder with an electric fan from the rear of the foaming nozzle (referred to as “fan type”), There is.

  In the case of the aspirator type, in order to ensure the target foaming ratio, the pressure of the foaming nozzle needs to be set to a high pressure, for example, about 0.5 MPa. Since an apparatus is required, equipment costs increase. Therefore, in order to solve this problem, the fan type is used.

JP-A-6-165837

  In the conventional example, assuming a case of indoor installation, even when a ventilation fan is disposed in the room, a dedicated fan for high expansion foam fire extinguishing equipment is provided. Therefore, since the same kind of fans are provided twice, it is wasteful and expensive.

  In view of the above circumstances, an object of the present invention is to make it possible to use an aeration fan as a fan of a high expansion foam fire extinguishing equipment.

The present invention is a high expansion foam fire extinguishing equipment comprising a fan, a foaming nozzle provided on the front side of the fan, and a foaming net provided on the front side of the foaming nozzle. An aeration fan that reverses the direction of rotation in the event of a fire and discharges air toward the foaming nozzle side, wherein the foaming net is provided so as to be openable and closable via a support control means.

  Since the present invention is configured as described above, the fan normally ventilates the room with the direction of rotation normal, and in the event of a fire, the direction is reversed to send air to the foaming machine. Therefore, since the said fan can be used for ventilation use and high expansion foam fire extinguishing equipment, it can prevent an increase in equipment cost and is economical.

  Further, when used as a fan of a high expansion foam fire extinguishing equipment, since air is introduced from the outside, that is, the outside of the room where a fire is occurring, clean air that does not contain smoke can be supplied to the foaming machine. Therefore, it is possible to prevent a reduction in the expansion ratio due to smoke, particularly smoke particles.

  The present inventor has noticed that the ventilation fan is used for the high expansion bubble fire extinguishing equipment. In this case, it has been found that the rotation direction of the ventilation fan may be reversed. In addition, the foaming net provided at the discharge port of the channel cylinder is covered and fixed to the discharge port. However, it is not always necessary to fix it, and it is opened away from the discharge port during ventilation and the discharge port during foaming. You may make it close and cover.

A first embodiment of the present invention (a water pipe direct fire extinguishing system) will be described with reference to FIGS.
A room (chamber) 1 which is a foam discharge section is provided with a highly expanded foam fire extinguishing equipment. This fire extinguishing equipment includes a foaming machine 3 having a flow channel cylinder 2, and the foaming ratio of the foaming machine 3 is set to 500 times, for example.

  The flow channel cylinder 2 is erected in a direction perpendicular to the inner wall surface of the side wall 5 of the room 1. The base end of the channel cylinder 2 is fixed to the opening 6 of the side wall 5, and the end thereof is a discharge port 7.

  A fan 8 is provided on the base end side of the flow path cylinder 2, and a base end of the foam net 10 is pivotally attached to the end side thereof. The free end 10a of the foam net 10 abuts against the damper 11 and is held by a latch 12 (FIG. 1). The damper 11 and the latch 12 are examples of support control means.

A plurality of foaming nozzles 15 are disposed on the side of the discharge port 7 of the flow path cylinder 2 at a predetermined interval in the circumferential direction.
In FIG. 1, 16 is a fire sensor for detecting a fire in the room 1 as a radiation section, 17 is an automatic valve provided in the water pipe 18, and 19 is a stock solution tank for storing foam stock solution.

  20 is a mixer that mixes the water supplied from the water pipe 18 with the foam stock solution sucked from the foam stock solution tank 19 to generate a foam aqueous solution. 21 is the fan 8, damper 11, latch 12, automatic valve. A receiver (control panel) for controlling 17 and the like, and 22 indicate an automatic valve 17, a mixer 20, and a fire extinguishing pipe connecting the foaming nozzle 15, respectively.

Next, the operation of this embodiment will be described.
Normal time:
In a state where no fire has occurred, the control panel 21 rotates the fan 8 forward as necessary to release the air A in the room 1 from the opening 6 to the outside. At this time, the fan 8 functions as a ventilation fan (see FIGS. 1 and 2).

In case of fire:
When a fire occurs and the fire detector 16 detects the fire, a fire signal is sent to the control panel 21. Then, the control panel 21 sends a reverse rotation signal to the fan 8 to reversely rotate the fan 8 and suck outdoor air into the flow path tube 2. The control panel 21 sends a valve opening signal to the automatic valve 17 to open the valve, and sends a release signal to the latch 12 to release the holding of the foaming net 10 and extends the damper 11. The foam net 10 is rotated forward and downward to cover the discharge port 7 (see FIG. 3).

  The water in the water pipe 18 flows into the fire extinguishing pipe 22 and is mixed with the foam stock solution sucked from the mixer 20 to become a foam aqueous solution w. The foam aqueous solution w is discharged from the foaming nozzle 15 and collides with the foaming net 10, sucks air Af and foams (highly expanded foam) B, and falls from the discharge port 7 toward the fire source (not shown). Then, cover the fire source and extinguish the suffocation.

  At this time, since the air Af is outdoor air, the expansion ratio is good as compared with the case where the air Af is used for foaming. This is because if the smoke particles are mixed in the air, the expansion ratio is reduced, but the outdoor air Af does not contain smoke. Further, since it is a fan type utilizing the reverse rotation of the fan 8, it is possible to discharge the sufficiently high foamed bubble B even if the discharge from the nozzle 15 is not high pressure.

A second embodiment of the present invention will be described with reference to FIG. 4. The same reference numerals as those in FIGS. 1 to 3 have the same names and functions.
The difference between this embodiment and the first embodiment is that in the first embodiment (water pipe direct fire extinguishing system), a mixer is provided to mix the water from the water pipe and the foam stock solution to produce an aqueous foam solution. However, the present embodiment (package fire extinguishing equipment) is to store the aqueous foam solution w in the fire extinguishing agent tank 40 in advance under pressure.

In this embodiment, since a water pipe is not required, the arrangement position can be freely selected as compared with the first embodiment.
In the first embodiment, the control panel 21 transmits a valve opening instruction to the automatic valve 17 of the water pipe 18 in the event of a fire, whereas in this embodiment, the valve opening instruction to the automatic valve 37 of the fire extinguisher tank 40. However, the other points are the same. Moreover, since it is a fan type using the reverse rotation of the fan 8, the discharge from the nozzle 15 may not be a high pressure, and the pressure in the tank 40 may not be higher than necessary.

A third embodiment of the present invention will be described with reference to FIG. 5. The same reference numerals as those in FIG. 4 have the same names and functions.
The difference between this embodiment and the second embodiment is that a heat sensitive joint 43 (heat sensitive open joint) is provided on the ceiling 42 of the room 1. The heat-sensitive joint 43 includes a valve body that opens and closes the flow path 43c, a valve rod 45 connected to the valve body, and a glass valve 47 that presses against the rear end of the valve rod 45. The inlet 43 a is connected to a fire extinguishing agent tank 40 that is filled with an aqueous foam solution w under pressure, and the outlet 43 b located at the center of the flow path is connected to the foaming nozzle 15. The glass valve 47 of the heat-sensitive joint 43 is also connected to the support means 46 of the foam net 10. Thereby, the foaming net 10 maintains the open state of the discharge port 7. The heat sensitive joint 43 and the support means 46 are examples of instruction control means.

  In this embodiment, when a fire occurs, the glass bulb 47 is heated and destroyed by the airflow of the fire. Then, the valve body receiving the water pressure of the aqueous foam solution w slides in the direction of the glass valve 47 that has been in pressure contact, and the outlet 43b is opened, and the support means 46 of the foaming net 10 is released and foaming is performed. The net 10 slides downward and covers the discharge port 7.

The foam aqueous solution w flows into the foam nozzle 15 from the outlet 43b, is radiated from the foam nozzle 15, collides with the foam net 10, and foams.
In this fire extinguishing equipment, by using the heat-sensitive joint 43, it is possible to detect a fire and to cover the foaming net at the time of the fire.

  As a method of rotating the fan 8 in the reverse direction, it is possible to use a fire signal of the fire detector 16 as in the second embodiment. However, as another method, the primary side or the secondary side of the thermal joint 43 can be used. A water flow detection device is provided in the fire extinguishing pipe 22, or a sensor 52 for detecting the foam net 10 is provided in the vicinity of the discharge port 7 as shown in the fourth embodiment to be described later. When the foaming net closing signal is input, the control panel 21 determines that a fire has occurred, and can send a reverse rotation signal to the fan 8 to reversely rotate the fan 8.

  The control panel 21 determines that a fire has occurred when any two of the fire signal from the fire detector 16, the water flow detection signal from the water flow detection device, and the foaming net closing signal from the sensor 52 are input. If a reverse rotation signal is sent to the fan 8, a highly reliable high expansion foam fire extinguishing equipment can be obtained.

  Moreover, in the said 3rd Example, although the fire extinguisher tank 40 was connected with the inlet 43a of the flow path 43c of the thermal coupling 43, the secondary side of the mixer 20 of a 1st Example is connected. You may do it. In this case, the automatic valve 17 is deleted so that the valve body of the heat-sensitive joint 43 always receives the water pressure of the foam aqueous solution w.

A fourth embodiment of the present invention will be described with reference to FIG. 6. The same reference numerals as those in FIGS. 1 to 3 have the same names and functions.
The difference between this embodiment and the first embodiment is as follows.
(1) Use of a heat sensitive member 50 such as a glass bulb or a fusible alloy as a support means of the foaming net 10 (an example of a support control means). In this embodiment, the free end 10a of the foam net 10 supported so as to be rotatable is tilted slightly forward, and the side wall is interposed via a support member such as a wire or rod attached to the heat sensitive member 50. 5 is fixed. Then, when a fire occurs and the heat-sensitive member 50 is heat-sensitive and destroyed or melted, the free end 10a of the foam net 10 is rotated downward and covers the discharge port 7.

  (2) A sensor 52 for detecting the foaming net 10 is provided in the vicinity of the discharge port 7 and connected to the control panel 21. For example, a contact sensor 52 is used as the sensor 52. When the foaming net 10 is closed with respect to the discharge port by the action of the sensor 52, a foaming net closing signal is sent to the control panel 21. Therefore, the foaming net 10 covers the discharge port 7 and it can be surely known that the preparation for foaming is completed. The sensor 52 of the present embodiment can also be applied to the first to third embodiments.

  The embodiment of the present invention is not limited to the above, and for example, the foaming net may be always put on the discharge port. In addition, a closing maintenance means such as an engaging means for maintaining the closed state of the discharge port 7 by the foaming net 10 in the event of a fire is provided in the foaming net 10 or the discharge port 7 so that excessive wind pressure or the like is generated by the fan 8. Even so, the closed state may be maintained.

It is a front view which shows 1st Example of this invention. It is a principal part expanded sectional view of FIG. It is an expanded section which shows the other state of FIG. It is a front view which shows 2nd Example of this invention. It is a front view which shows 3rd Example of this invention. It is a principal part expanded sectional view which shows 4th Example of this invention, and is a figure corresponding to FIG.

Explanation of symbols

1 room 2 channel cylinder 3 foaming machine 7 discharge port 8 fan 10 foaming net 11 damper 12 latch 15 foaming nozzle

Claims (1)

A high expansion foam fire extinguishing equipment comprising a fan, a foaming nozzle provided on the front side of the fan, and a foaming net provided on the front side of the foaming nozzle,
Said fan is reversed the direction of rotation in a fire toward the blowing nozzle side Ri喚気fan der for ejecting air, the foaming network, are openably provided through the support control means High expansion foam fire extinguishing equipment.

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