JP2006034748A - Accumulator fire extinguisher - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an accumulator fire extinguisher capable of easily and safely extinguishing while preventing solid flammable fine powder from scattering. <P>SOLUTION: This accumulator fire extinguisher is equipped with a main container filled with a foam aqueous solution and gas for pressing to spray the foam aqueous solution out, a start lever for operating to open a valve attached on the upper part of this main container, a horse 8 connected with the proximal end to the valve, a nozzle body 10 attached to the tip end of the horse 8, a nozzle 11 attached to the tip end of the nozzle body, a nozzle valve 12 for opening and closing the connection between the inside of the nozzle body 10 and the nozzle 11, and a nozzle lever 13 for opening the nozzle valve, and the proximal end of a foaming device 28, which has an air suction port 37 at the proximal end side and a foam discharge port 38 at the tip end, is connected to the tip end of the nozzle 11, and a foaming net 39 is attached to the inside of the foaming device 28. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a pressure-accumulating foam fire extinguisher that can effectively extinguish a fire in a manufacturing factory of a solid fine powder combustible used for a copying machine or the like.

  Solid pulverized combustibles used in copying machines, etc., may ignite on the production line and cause a fire. For this reason, mobile fire extinguishers are always installed in the factory. Accounted for.

  However, in a powder fire extinguisher, the powder extinguisher is expelled vigorously in the form of a rod toward the combustible combustible material that burns. It was awkward. There was also a risk of reignition due to a spark. Moreover, even if a mechanical foam (also referred to as air foam) fire extinguisher is used instead of the powder fire extinguisher, this takes air from the air suction port provided in the nozzle when the foam is emitted from the nozzle at the tip of the hose. This foaming ratio (volume ratio of foam aqueous solution and generated foam) is too low, so if the foam radiant power is too strong and sprayed on the combustible fine powder combustible, it is still fine fine combustible The problem that scatters.

  The present invention has been made to solve the above-mentioned problems, and the object of the present invention is to effectively and safely prevent the scattering of solid pulverized combustibles that are easily scattered in an accumulator-type foam fire extinguisher. The object is to provide a pressure-accumulating foam fire extinguisher that can be extinguished.

  In order to achieve the above object, the present invention provides a main body container filled with an aqueous foam solution, a pressurizing gas for ejecting the aqueous foam solution, a container valve attached to an upper portion of the main body container, and the container valve. A starting lever for opening the valve, a hose having a base end connected to the container valve, and a siphon tube that is housed in the main body container and that guides the aqueous foam solution to the hose when the container valve is opened. A nozzle body at the tip of the hose, a nozzle attached to the tip of the nozzle body, a nozzle valve for opening and closing a communication state between the nozzle body and the nozzle, and a nozzle lever for opening the nozzle valve In the pressure accumulating foam fire extinguisher, a proximal end portion of a foamer having an air suction port on the proximal end side and a foam discharge port on the distal end is connected to the distal end of the nozzle, Downstream from the air inlet Those having features that are fitted with a foam net.

  As one suitable aspect, according to the pressure accumulation type | formula fire extinguisher of this invention, the foaming magnification after passing the said foaming net | network can be set to 14-20 times. Moreover, the bubble radiation distance from the bubble discharge port can be set to 2 m to 7 m. The foam net can be detachably attached to the foamer.

  When the foam aqueous solution is radiated from the nozzle, the air is taken in from the air suction port and foamed. At this time, the foaming ratio is 6 to 10 times at most. However, since the pulverized combustible material is scattered, the foaming ratio is increased to about 14 to 20 times by introducing air through a foaming net, and bubbles having a relatively high foaming ratio are emitted from the foam outlet. can do. Therefore, bubbles with a relatively high expansion ratio that radiate from the bubble outlet reduce the intensity of radiation and reduce the speed, but radiate while securing a predetermined radiation distance, and at least about 2 m from the radiation position. It is possible to extinguish the fire with almost no scattering of the fine powder combustible material by gently falling down on the combustion fine powder combustible material at a remote location and covering the surface of the fine powder combustible material. For this reason, secondary disasters due to the combustion of flying objects have been eliminated, and post-processing after fire extinguishing has become easy.

If the expansion ratio after passing through the foam net is less than 14 times, the foam radiation force is too strong and the fine powder combustibles are scattered. If it exceeds 20 times, the foam radiation force is too weak to secure a sufficient radiation distance, and fine powder. Satisfactory fire extinguishing is not possible even if it is close to 2m from a combustible material. Therefore, the expansion ratio after passing through the foam net is 14 to 20 times, more preferably 20 times.
If the radiation distance of the foam is less than 2 m, there is a danger of fire because the fire extinguisher user is too close to the combustible fine powder combusted. When radiating from a position approaching below, the radiating bubbles are too strong and scatter fine combustibles. Therefore, in order to extinguish the solid finely combustible material safely and effectively without scattering, the radiation distance of the bubbles is 2 to 7 m, more preferably around 5 m.

The best mode for carrying out the present invention will be described below with reference to the drawings.
1 is a side view of a pressure accumulating foam fire extinguisher showing an embodiment of the present invention, FIG. 2 is a rear view of the pressure accumulating foam fire extinguisher, FIG. 3 is an enlarged sectional view of part A in FIG. 2, and FIG. It is an expanded sectional view which shows the nozzle part of the hose front-end | tip of a pressure accumulation type | formula fire extinguisher.

  As shown in FIGS. 1 to 3, the pressure-accumulating foam fire extinguisher according to the present invention is filled with a foam aqueous solution (a mixture of a foam fire extinguisher and water) and a pressurizing gas such as nitrogen for ejecting the foam aqueous solution. The main body container 1, the container valve 2 attached to the upper part of the main body container 1, and the starting lever support member 3 fixed to the upper part of the container valve 2 are pivotally supported so as to be able to stand up and tilt. A start lever 5 for opening the container valve 2, a safety plug 6 that is inserted in the start lever support member 3 so as to be detachable and prevents the start lever 5 from being accidentally tilted, and a hose having a base end connected to the container valve 2 8 and a siphon tube 9 that is stored in the main body container 1 and guides the aqueous foam solution to the hose 8 when the container valve 2 is opened. A nozzle body 10 at the tip of the hose 8, a nozzle 11 attached to the tip of the nozzle body 10, a nozzle valve 12 that opens and closes the communication state between the nozzle body 10 and the nozzle 11, and the nozzle valve 12 are opened. A nozzle lever 13 is provided.

  As shown in FIG. 4, the nozzle 11 has a flange portion 14 on the outer periphery and male screws 15 and 16 on the front and rear of the flange portion 14, and the rear male screw 16 is connected to the distal end of a pipe line 17 in the nozzle body 10. It is screwed into the female screw 18 of the part. In the rear of the nozzle 11 in the pipe line 17, a packing 19, a valve seat 20, a spindle 22 having a nozzle valve body 21 that is in close contact with the valve seat 20, and a spindle receiver 23 are installed at the tip. A tip end portion 13 a of the nozzle lever 13 is engaged with a rear end portion of the spindle 22 protruding rearward of the spindle receiver 23. During normal operation, the nozzle lever 13 is opened and biased by a spring 24 interposed between the nozzle lever 13 and the nozzle body 10, and the spindle 22 is pushed forward by the nozzle lever 13 so that the nozzle valve element 21 is brought into close contact with the valve seat 20. By doing so, the aqueous foam solution flowing in the pipe line 17 of the nozzle body 10 is blocked from flowing into the nozzle 11. Now, when the nozzle lever 13 is operated to close around the pivot 25, the spindle 22 is pulled backward, the nozzle valve body 21 is separated from the valve seat 20, and the aqueous foam solution in the nozzle body 10 flows into the nozzle 11. 1 and 2, reference numeral 27 denotes a wheel for transportation that is attached to a lower end portion of the main body container 1 on the back side.

The present invention is characterized in that in the above-mentioned accumulator fire extinguisher, the nozzle portion at the tip of the hose 8 is configured as follows.
That is, as shown in FIG. 4, the foamer 28 is attached to the tip of the nozzle 11. The foaming device 28 is generally formed in a bottomed cylindrical shape, and includes a bottomed cylindrical base portion 29, a tapered tip cylindrical portion 30, and an intermediate cylindrical portion 31 that connects the bottomed cylindrical base portion 29 and the distal cylindrical portion 30. It consists of a split structure, and the internal thread 32 at the front end of the bottomed cylinder base 29 and the external thread 33 at the rear end of the intermediate cylinder part 31 are screwed together to join, and the internal thread 34 at the front end of the intermediate cylinder part 31 and the tip cylinder part 30 A rear end male screw 35 is screwed and joined. A screw hole 36 is provided in the center of the bottomed tube base 29, and the screw hole 36 is connected and fixed to the male screw 15 on the front side of the nozzle 11. One or a plurality of air suction ports 37 are provided around the screw hole 36 of the bottomed cylinder base 29 of the foamer 28. The tip cylinder part 30 of the foaming device 28 has a foam discharge port 38, which is narrower than the inner diameter of the intermediate cylinder part 31.

A point to be noted here is a predetermined location on the downstream side (foam discharge port 38 side) of the air suction port 37 in the foaming device 28, in the illustrated example, a screw joint portion between the bottomed tube base 29 and the intermediate tube portion 31. When the foamed net 39 formed in a funnel shape or the like is attached and the foam aqueous solution is radiated from the nozzle 11, the foaming ratio (the volume ratio of the foamed aqueous solution to the generated foam) is obtained by taking in air from the air suction port 37. ), The expansion ratio is further increased.
When the foam aqueous solution is radiated from the nozzle 11 and the air is simply taken in from the air suction port 37 and foamed, the foaming ratio is at most 6 to 10 times. Since the problem cannot be solved, the foaming ratio is increased to 14 to 20 times, preferably about 20 times by introducing air through the foamed net 39, and the foam having a relatively high foaming ratio is removed from the foam outlet 38. The radiation can be emitted at a radiation distance of at least 2 m.

  The bubble radiation distance from the bubble discharge port 38 is 2 m to 7 m, preferably around 5 m. If it is less than 2 m, there is a danger of fire because the user of the fire extinguisher burns too close to the combustible fine powder combusted. This is because when radiating from a radiation position approaching the point, the radiating bubbles are too strong and the finely combustible material is scattered widely.

  In the pressure accumulating foam fire extinguisher having the above configuration, the foam lever aqueous solution is emitted from the nozzle 11 by tilting the start lever 5 to open the container valve 2 and closing the nozzle lever 13 at hand to open the nozzle valve 12. In some cases, air is taken in from the air suction port 37 and foamed and further passed through the foaming net 39 to increase the foaming ratio, thereby weakening the momentum of the foam and radiating from the foam discharge port 38. Then, since it flutters down on the fine powder combustible material that burns at least 2m away from the radiation position and covers the surface of the fine powder combustible material, the fire extinguishes almost without scattering the fine powder combustible material. It came.

  The foam net 39 can be removed by separating the bottomed cylinder base 29 and the intermediate cylinder 31 by the male and female screws 32 and 33, and can be easily replaced due to breakage or the like. It should be noted that a plurality of foam nets 39 can be attached in a row at predetermined intervals in the bubble flow direction as required.

It is a side view of the pressure accumulation type | formula fire extinguisher which shows one Example of this invention. It is a rear view of the same pressure accumulation type | formula fire extinguisher. It is an expanded sectional view of the A section in FIG. It is an expanded sectional view which shows the nozzle part of the hose front-end | tip of the same pressure accumulation type | formula fire extinguisher.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Main body container 2 Container valve 5 Starting lever 8 Hose 9 Siphon tube 10 Nozzle main body 11 Nozzle 12 Nozzle valve 13 Nozzle lever 28 Foaming device 37 Air suction port 38 Foam discharge port 39 Foam net

Claims (4)

A main body container filled with a foam aqueous solution and a pressurizing gas for ejecting the foam aqueous solution, a container valve attached to the upper part of the main body container, an activation lever for opening the container valve, and a container valve A hose with a proximal end connected thereto, and a siphon tube that is housed in the main body container and leads the aqueous foam solution to the hose when the container valve is opened. In a pressure accumulating foam fire extinguisher comprising a nozzle attached to the tip of a nozzle body, a nozzle valve that opens and closes the communication state between the nozzle body and the nozzle, and a nozzle lever that opens the nozzle valve,
At the tip of the nozzle, connect a base end of a foamer having an air suction port at the base end side and a foam discharge port at the tip, and attach a foam net downstream from the air suction port in the foamer Accumulated foam fire extinguisher, characterized by   The pressure-accumulation type foam fire extinguisher according to claim 1, wherein an expansion ratio after passing through the foam net is set to 14 to 20 times.   The pressure accumulation type | formula fire extinguisher of Claim 1 or 2 which has set the radiation distance of the foam from the said foam discharge port to 2-7 m. The pressure accumulation type | formula fire extinguisher of any one of Claim 1 thru | or 3 with which the said foaming net is attached to the said foamer so that attachment or detachment is possible.

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