JP6570953B2 - Foaming equipment for foam fire extinguishing equipment - Google Patents

Description

  The present invention relates to a foaming apparatus for foam fire extinguishing equipment, which is mainly installed in a tank storage for storing flammable liquids such as petroleum.

  As a fire extinguishing facility in a tank storage for storing flammable liquids such as oil, foaming fire-fighting foam by foaming a foam-extinguishing foam aqueous solution that has been mixed with air and mixed with a foam-extinguishing chemical foam foam and water. There is a foam extinguishing system that generates and covers the flame with fire-extinguishing foam, shuts off the flame and oxygen from the outside air, and extinguishes fire. The foam extinguishing equipment includes a foaming device that generates a foam for fire extinguishing by foaming a foam fire extinguishing foam aqueous solution obtained by mixing air and a foam extinguishing chemical mixture composed of a foam fire extinguishing chemical and water.

  Conventionally, as a foaming apparatus for foam fire extinguishing equipment, as shown in FIG. 11, an orifice 19 and an air intake port 20 for injecting a foam fire-extinguishing agent mixed solution obtained by mixing the introduced foam-extinguishing agent and water are provided on the primary side. , A fire extinguishing foam aqueous solution radiation tube 22 provided with a radiation port 21 on the secondary side, and a foaming chamber 23 attached to the secondary side of the fire extinguishing foam aqueous solution radiation tube 22. Air is sucked in from the air intake port 20 by the negative pressure generated by the injection of the foam fire-extinguishing agent mixture injected into the aqueous solution radiant tube 22, and the fire-extinguishing foam aqueous solution in which the foam-extinguishing agent mixture and air are stirred and mixed therein is the emission port. 21 for foam fire extinguishing equipment that radiates into the foaming chamber 23, collides with the top plate 24 of the foaming chamber 23 to cause foaming, and emits foam for fire extinguishing from a foam outlet 25 that opens in the foaming chamber 23. Foam device is known (e.g., see Patent Document 1.).

JP 2009-284999 A

In foam extinguishing, a foam performance such as a high foaming ratio and a long reduction time is required for a fire extinguishing foam produced by mixing air in a fire extinguishing foam aqueous solution in which fire fighting water and foam stock solution are mixed at a predetermined ratio. The higher the expansion ratio, the larger the volume of foam generated, and the fire target can be covered with thicker foam. In addition, the longer the reduction time, the harder the foam will break, so cover the fire target for a long time. This is because it is advantageous for fire extinguishing. The higher foaming ratio is improved as the fire-fighting foam aqueous solution and air are mixed well, and the longer reduction time is improved as the diameter of the generated foam is smaller.
Even with a conventional foaming device for foam fire extinguishing equipment as described in Patent Document 1, foam performance such as a sufficiently high foaming ratio and a long reduction time on the standard is obtained, but in the foam fire extinguishing equipment, Improving the foam performance such as the expansion ratio and reduction time and improving the fire extinguishing effect has always been a challenge.

  In order to produce a fire-fighting foam having a foam performance such as a high foaming ratio and a long reduction time, the present inventors improve the mixing of the fire-fighting foam aqueous solution and air and reduce the produced foam. As a result of repeated research, the present invention has been achieved by paying attention to increasing the moving distance and residence time of bubbles in the foaming chamber.

  An object of the present invention is to provide a foaming apparatus for foam fire extinguishing equipment that can improve foam performance with a simple apparatus.

  In order to achieve the above object, the invention according to claim 1 is provided with an orifice and an air intake on the primary side for injecting a foam fire-extinguishing agent mixed solution obtained by mixing the introduced foam-extinguishing agent and water, The secondary side includes a fire-fighting foam aqueous solution radiant tube provided with a radiation port, and a foaming chamber attached to the secondary side of the fire-fighting foam aqueous solution radiant tube. Foam solution for fire extinguishing, in which air is sucked in from the air intake by negative pressure due to jetting of the foam fire-extinguishing agent mixture sprayed on the inside, and the foam-extinguishing agent mixture solution and air are stirred and mixed in the foam chamber from the radiation port In the foam extinguishing apparatus for foam fire extinguishing equipment, the foam extinguishing foam is discharged from a foam discharge port that opens to a cylindrical side wall of the foaming chamber. Located between the radiation outlet of the foam aqueous solution radiant tube and the foam outlet opening in the cylindrical side wall of the foaming chamber, the flow of the foam toward the foam outlet is blocked and bypassed to release the foam. A weir plate that flows to the outlet is arranged in front of the foam discharge port.

  According to a second aspect of the present invention, there is provided a fire extinguisher radiated from the radiation port into a space between the top plate of the foaming chamber and the radiation port of the fire-extinguishing foam aqueous solution radiation tube according to the first aspect. The first foam-making net member that allows the aqueous foam solution to pass through is disposed.

  According to a third aspect of the present invention, the fire-extinguishing foam aqueous solution radiated from the radiation outlet is passed through the radiation outlet of the fire-extinguishing foam aqueous solution radiating tube according to any one of the first or second aspect. The second foaming net member is arranged so as to cover the entire surface of the radiation opening.

  According to the foaming apparatus for foam fire-extinguishing equipment according to claim 1, it is located between the radiation port of the fire-fighting foam aqueous solution radiation tube and the bubble discharge port opened in the cylindrical side wall of the foaming chamber. Since the dam plate that blocks the flow of the foam toward the foam discharge port and flows to the foam discharge port is bypassed, the fire-fighting foam aqueous solution radiated from the radiation port of the fire-fighting foam aqueous solution radiation tube is Foaming is promoted not only by colliding with the top plate of the foaming chamber, but also by colliding with the barrier plate. Since the detour flows to the bubble discharge port, the movement distance and residence time of the bubbles in the foaming chamber are increased correspondingly, and the movement distance and time in which the bubbles and air vortex in the foaming chamber and are swollen Because it becomes longer, water for fire extinguishing Will be liquid and air to foam in well mixed each other with high magnification, it is possible to size the foamed bubbles produces excellent fire fighting foam long foam performance of small reduction time.

According to the foaming apparatus for foam fire extinguishing equipment according to claim 2, the space between the top plate of the foaming chamber and the radiation port of the foam aqueous solution radiation pipe for fire extinguishing according to claim 1, Since the first foam-making net member that allows passage of the fire-fighting foam aqueous solution radiated from the radiation port is disposed, the fire-fighting foam aqueous solution radiated from the radiation port of the fire-fighting foam aqueous solution radiant tube is disposed within the foaming chamber. By colliding with and passing through the first foaming net member in the process of diffusion, it is effectively crushed and becomes small foamy water droplets.
This small foamy water droplet collides with the top plate of the foaming chamber, and further collides with the weir plate and heads toward the foam discharge port. Thus, it is possible to produce a fire-extinguishing foam having a smaller foamed foam diameter and a longer foaming performance with a longer reduction time.

According to the foaming apparatus for foam fire-extinguishing equipment of Claim 3, it radiates | emits from the said radiation | emission opening to the said radiation | emission opening of the said foam aqueous solution radiation tube for fire-extinguishing of any one of Claim 1 or 2. Since the second foaming net member that allows the fire-extinguishing foam aqueous solution to pass through is disposed so as to cover the entire surface of the radiation port, the fire-extinguishing foam aqueous solution radiated from the radiation port of the fire-extinguishing foam aqueous solution radiation tube When it radiates | emits from an opening | mouth, all collide with the said 2nd foam-making net | network member reliably, and it is effectively crushed and becomes a small foamy water droplet.
This small foamy water droplet collides with the top plate of the foaming chamber, and further collides with the weir plate and heads toward the foam discharge port. Thus, it is possible to produce a fire-extinguishing foam having a smaller foamed foam diameter and a longer foaming performance with a longer reduction time.
In addition, the first foam net member that allows the fire-fighting foam aqueous solution radiated from the radiation port to pass through the space between the top plate of the foaming chamber and the radiation port of the fire-fighting foam aqueous solution radiation tube. In the case where it is arranged, the first foam-forming foam solution in the process of diffusing in the foaming chamber is the fire-fighting foam aqueous solution radiated as small foamy water droplets from the radiation port of the fire-fighting foam aqueous solution radiation tube. By colliding with and passing through the mesh member, it is crushed more effectively, resulting in smaller foamy water droplets.
Since these small foamy water droplets collide with the top plate of the foaming chamber, and further collide with the weir plate and go to the foam discharge port, the fire-fighting foam aqueous solution and the air are mixed better and at a high magnification. Foaming is performed, and it is possible to produce a fire-extinguishing foam having a smaller foam diameter and a longer reduction time and excellent foam performance.

It is a schematic longitudinal cross-sectional view which shows the 1st example of embodiment of the foaming apparatus for foam fire extinguishing facilities which concerns on this invention. It is the sectional view on the AA line of FIG. It is explanatory drawing which shows the flow of the foam of the foaming apparatus for foam fire extinguishing facilities shown in a 1st example. It is a schematic longitudinal cross-sectional view which shows the 2nd example of embodiment of the foaming apparatus for foam fire extinguishing facilities which concerns on this invention. It is an expanded sectional view of the foaming net member shown in FIG. It is a schematic longitudinal cross-sectional view which shows the 3rd example of embodiment of the foaming apparatus for foam fire extinguishing facilities which concerns on this invention. It is an expanded sectional view of the foaming net member shown in FIG. It is a schematic longitudinal cross-sectional view which shows the 4th example of embodiment of the foaming apparatus for foam fire extinguishing facilities which concerns on this invention. It is an expanded sectional view of the foaming net member shown in FIG. It is a schematic longitudinal cross-sectional view which shows the 5th example of embodiment of the foaming apparatus for foam fire extinguishing facilities which concerns on this invention. It is a schematic longitudinal cross-sectional view which shows the conventional foaming apparatus for foam fire extinguishing equipment.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a foaming apparatus for foam fire extinguishing equipment according to the present invention will be described in detail with reference to the drawings.
1 to 3 show a first example of an embodiment of a foaming apparatus for foam fire extinguishing equipment according to the present invention, FIG. 1 is a schematic longitudinal sectional view of this example, and FIG. 2 is a sectional view taken along line AA in FIG. FIG. 3 is an explanatory view showing the flow of bubbles in the foaming device for a foam extinguishing facility shown in the first example.

  The foaming apparatus for foam fire extinguishing equipment of this example is provided with an orifice 1 and an air intake port 2 on the primary side and a foam aqueous solution radiation tube 4 with a radiation port 3 on the secondary side, and a foam aqueous solution for fire extinguishing. A foaming chamber 5 attached to the secondary side of the radiation tube 4 is provided.

  In the fire-extinguishing foam aqueous solution radiation tube 4, there is a connection portion 6 connected to a water supply pipe (not shown) for supplying a fire-extinguishing foam aqueous solution in which a fire extinguishing water and a foam stock solution are mixed in a predetermined ratio at the primary side end. The fire-fighting foam aqueous solution supplied from the water pipe is jetted into the fire-fighting foam aqueous solution radiation pipe 4 by passing through the orifice 1, and from the air intake 2 due to the negative pressure due to the jet of the foam fire-extinguishing chemical mixture Air is sucked into the fire-extinguishing foam aqueous solution radiation tube 4, and the fire-extinguishing foam aqueous solution obtained by stirring and mixing the foam fire-extinguishing agent mixed solution and air in the fire-extinguishing foam aqueous solution radiation tube 4 is emitted from the radiation port 3 into the foaming chamber 5. It is like that.

The foaming chamber 5 includes a top plate 7, a cylindrical side wall 8, and a bottom plate 9 that collide and foam the fire-extinguishing foam aqueous solution radiated from the radiation port 3 of the fire-extinguishing foam aqueous solution radiation tube 4. In the cylindrical side wall 8, a foam discharge port 10 for releasing the fire-extinguishing foam foamed in the foaming chamber 5 is opened. Although not shown, the top plate 7 has a function as a lid that can be opened and closed.
Moreover, in this example, the top plate 7 is disposed so as to face the radiation port 3 so that the fire-fighting foam aqueous solution radiated from the radiation port 3 does not collide with the top plate 7 and does not directly face the foam discharge port 10. The radiation port 3 is above the bubble discharge port 10, the bottom plate 9 has an inclined surface from the top to the bottom of the bubble discharge port 10, and the fire-fighting foam aqueous solution colliding with the top plate 7 is It is reflected and collides with the inclined surface of the bottom plate 9 and is guided to the bubble discharge port 10 by the inclined surface.

Furthermore, it is located between the radiation outlet 3 of the fire-extinguishing foam aqueous solution radiation tube 4 and the foam discharge opening 10 opened in the cylindrical side wall 8 of the foaming chamber 5 to block the flow of foam toward the foam discharge opening 10 and bypass it. A dam plate 11 that is allowed to flow to the foam discharge port 10 is disposed.
In this example, the barrier plate 11 is attached to the flange 13 formed in the radiation port 3 of the fire-extinguishing foam aqueous solution radiation tube 4 via the L-shaped metal fitting 12, and the radiation port 3 of the fire-extinguishing foam aqueous solution radiation tube 4 It arrange | positions so that it may be located between the foam discharge ports 10 opened to the cylindrical side wall 8 of the foaming chamber 5.

Between the periphery of the dam plate 11 arranged in this way and the inner surface of the foaming chamber 5, there is a gap through which the foam foamed in the foaming chamber 5 is passed. This gap is set to an interval within a range that does not hinder the required flow rate of the fire-extinguishing foam discharged from the foam discharge port 10.
In this example, a gap S <b> 1 is provided between both sides of the barrier plate 11 and the cylindrical side wall 8 of the foam chamber 5, and between the upper side of the barrier plate 11 and the top plate 7 of the foam chamber 5, and the barrier plate 11. Clearances S <b> 2 and S <b> 3 are provided between the bottom of the foaming chamber 5 and the bottom plate 9 of the foaming chamber 5.
Moreover, although the dam plate 11 is a curved quadrilateral plate along the cylindrical side wall 8 of the foaming chamber 5 in this example, it may be a flat plate.

  Further, the barrier plate 11 is disposed so as to block the flow of bubbles with respect to the bubble discharge port 10. The dam plate 11 arranged in this way is in front of the foam discharge port 10, and a gap S <b> 4 through which the foam is passed is provided between the foam discharge port 10. The gap S <b> 4 here refers to the distance between the cylindrical side wall 8 side of the foam outlet 10 and the surface of the barrier plate 11 on the side of the foam outlet 10.

By installing the barrier plate 11 in this way, when the inside of the foaming chamber 5 is viewed from the bubble discharge port 10, the barrier plate 11 appears to block the bubble discharge port 10. When the opening of the bubble discharge port 10 is projected onto the barrier plate 11, the ratio of the area occupied by the barrier plate 11 to the opening area of the projected bubble discharge port 10 and the opening area (cross-sectional cut-off area ratio) 5% to 80% is preferable, and 30% to 50% is more preferable.
When the ratio of the area occupied by the weir plate 11 to the opening area (cross-sectional blocking area ratio) is less than 5%, the blocking of the foam toward the foam discharge port 10 is not sufficient, and the foam weir has an effect on foaming. It is difficult to obtain sufficient foaming performance because an effective collision with the plate 11 and a sufficient movement distance and residence time of bubbles in the foaming chamber 5 for promoting foaming cannot be obtained. Moreover, when it exceeds 80%, a flow path will become narrow and it will become difficult to ensure sufficient flow volume of a bubble.
When the ratio of the area occupied by the dam plate 11 to the opening area (cross-sectional blocking area ratio) is 30% to 50%, effective collision of the foam acting on the foam with respect to the dam plate 11 and foaming are promoted. Therefore, a sufficient movement distance and residence time of the bubbles in the foaming chamber 5 can be obtained, sufficient foaming performance can be obtained, and a sufficient flow rate of the foam can be secured.

Further, the barrier plate 11 is disposed with a gap S4 between the fire-extinguishing foam aqueous solution radiation tube 4 and the foam discharge port 10, and the gap S4 is arranged at a distance between the fire-extinguishing foam aqueous solution radiation tube 4 and the foam discharge port 10. On the other hand, the position is preferably 5% to 50% from the foam outlet 10 and more preferably 10% to 25%. At this time, 0% means that the weir plate 11 and the foam outlet 10 are in contact.
If the gap S4 is less than 5% of the distance between the foam outlet 10 and the foam outlet 10 for the fire extinguishing foam, the foam outlet 10 becomes narrower and a sufficient flow rate of the foam is secured. It becomes difficult to do. Further, if the position exceeds 50%, the effect of shielding the flow path is not sufficient.
If the gap S4 is 10% to 25% of the distance between the foam discharge outlet 10 and the foam aqueous solution radiation tube 4 for fire extinguishing, the bubbles and air vortex more strongly in the foam chamber 5 The fire-fighting foam aqueous solution and air are mixed well and foamed at a high magnification, so that sufficient foaming performance can be obtained and a sufficient flow rate of foam can be secured.

  In addition, it is preferable that the opening diameter of the emission port 3 of the fire-extinguishing foam aqueous solution radiation tube 4 and the opening diameter of the bubble discharge port 10 are the same diameter or the bubble discharge port 10 has a small diameter. If the bubble discharge port 10 is smaller in diameter than the radiation port 3, the bubble blocking passage in the foaming chamber 5 acts to block the bubbles and air in the foaming chamber 5 more strongly, and the foam aqueous solution for fire extinguishing. And air are well mixed and foamed at a high magnification, and sufficient foaming performance can be obtained.

  According to the foaming device for foam fire extinguishing equipment of this example configured as described above, the fire-extinguishing foam aqueous solution radiated from the radiation port 3 of the fire-extinguishing foam aqueous solution radiation tube 4 collides with the top plate 7 of the foaming chamber 5. In addition, the foaming is promoted by colliding with the barrier plate 11, and the foam and the foam toward the foam discharge port 10 are blocked by the barrier plate 11, bypassing the barrier plate 11 and surrounding the barrier plate 11. It flows to the bubble discharge port 10 through the gap S that is open at the bottom. As a result, the movement distance and residence time of the foam in the foaming chamber 5 become longer, and the movement distance and time in which the foam and air vortex in the foaming chamber 5 are swollen, so that the fire extinguishing foam aqueous solution and air Are mixed well, the foaming ratio is high, and fire extinguishing foams with a small foam diameter and a long reduction time are generated.

4 and 5 show a second example of the embodiment of the foaming apparatus for foam fire extinguishing equipment according to the present invention, FIG. 4 is a schematic longitudinal sectional view of this example, and FIG. 5 is the foam-forming net member shown in FIG. FIG.
The foaming apparatus for foam fire extinguishing equipment of this example is not different from the foaming apparatus for foam fire extinguishing equipment of the first example in the basic configuration, and the same configuration as the first example will be described with the same reference numerals.

The foam extinguishing apparatus for the foam fire extinguishing equipment of this example passes the fire extinguishing foam aqueous solution radiated from the radiation outlet 3 into the space between the top plate 7 of the foaming chamber 5 and the radiation outlet 3 of the fire extinguishing foam aqueous solution radiation tube 4. The 1st foaming net member 14a to be made is arrange | positioned.
The first foaming net member 14a of this example is configured by a net plate formed in a dome shape, and is attached to the top plate 7 via the mounting plate 15 so that the opening side is brought into contact with the top plate 7. . Further, between the first foam network member 14a and the top plate 7, in order to prevent the deformation of the first foam network member 14a due to the collision of the fire-extinguishing foam aqueous solution, the first foam network member 14a is centered. A column 16 is provided to support the position from the inside.

The first foaming net member 14a has a wire diameter and a mesh necessary for crushing the fire-extinguishing foam aqueous solution colliding with the first foaming net member 14a and passing it as small foamy water droplets.
The wire diameter of the first foam network member 14a is preferably 0.85 mm to 1.2 mm. If the wire diameter is less than 0.85 mm, there is anxiety in terms of strength, and if it exceeds 1.2 mm, the workability is difficult and the cost increases.
Moreover, 1 mm-12 mm are preferable and the opening of the mesh of the 1st foaming net member 14a is more preferable if it is 4 mm-7 mm. If the opening is less than 1 mm, it is difficult to pass through the fire-fighting foam aqueous solution, and it is difficult to obtain a satisfactory effect for foaming of the fire-fighting foam aqueous solution. The impact effect of the fire-fighting foam aqueous solution is diminished, and it becomes difficult to obtain the effect of crushing the fire-fighting foam aqueous solution into small foamy water droplets. When the mesh opening of the first foam net member 14a is 4 mm to 7 mm, the fire-extinguishing foam aqueous solution radiated from the radiation port 3 is allowed to effectively collide with the first foam net member 14a and pass therethrough. The fire-extinguishing foam aqueous solution can be effectively crushed by the first foam-making net member 14a to form small foamy water droplets.

  According to the foaming device for foam fire extinguishing equipment of this example configured as described above, the fire-extinguishing foam aqueous solution radiated from the radiation port 3 of the fire-extinguishing foam aqueous solution radiating tube 4 is first applied to the first foam-making net member 14a. By colliding and passing, it is effectively crushed and becomes small foamy water droplets that collide with the top plate 7 of the foaming chamber 5. In this example, the first foaming net member 14 a is the top plate of the foaming chamber 5. 7 is disposed in a space between the radiation outlet 3 of the fire-fighting foam aqueous solution radiant tube 4, so that the fire-extinguishing foam aqueous solution radiated from the radiation outlet 3 of the fire-extinguishing foam aqueous solution radiant tube 4 is diffused in the foaming chamber 5. In the process, it will collide with and pass through the first foaming net member 14a, and by passing through the first foaming net member 14a in a state of being further mixed with air in the foaming chamber 5, Air mixes well and foams at high magnification, and Long extinguishing foam diameter of the foamed bubbles is small reduction time is generated.

  Subsequently, foaming is promoted by the foam foamed in the foaming chamber 5 colliding with the barrier plate 11, and foaming is promoted. The foam is directed to the foam discharge port 10, and the flow is blocked by the barrier plate 11. By detouring and flowing through the gap S that is open around the weir plate 11 to the foam discharge port 10, the movement distance and residence time of the foam in the foaming chamber 5 become longer, and the foam and air in the foaming chamber 5 become longer. Since the movement distance and time for which the vortex is swirled becomes longer, the fire-fighting foam aqueous solution and the air mix well and foam at a high magnification, and the diameter of the foamed foam decreases, and this action is In combination with the above-mentioned action, the fire-fighting foam aqueous solution and air are mixed better and foamed at a higher magnification, and a fire-fighting foam having a smaller foam diameter and a longer reduction time is generated.

  In particular, in the present example, the first foaming net member 14a is made of a net plate formed in a dome shape, and is attached to the top plate 7 so that the opening side is brought into contact with the top plate 7. Foamed water droplets radiated from the radiation port 3 of the aqueous solution radiation tube 4 and passed through the first foaming net member 14a and entered the dome collide with the top plate 7 of the foaming chamber 5 and foam, and again the first Since it passes through the foaming net member 14a and goes out of the dome, it passes through the first foaming net member 14a twice, resulting in a foam having a smaller diameter and a fire extinguishing foam with a long reduction time. .

6 and 7 show a third example of the embodiment of the foaming apparatus for foam fire extinguishing equipment according to the present invention, FIG. 6 is a schematic longitudinal sectional view of this example, and FIG. 7 is the foam-forming net member shown in FIG. FIG.
The foaming apparatus for foam fire extinguishing equipment of this example is not different from the foaming apparatus for foam fire extinguishing equipment of the first example in the basic configuration, and the same configuration as the first example will be described with the same reference numerals.

The foaming device for foam fire extinguishing equipment of this example is radiated from the radiation port 3 into the space between the top plate 7 of the foaming chamber 5 and the radiation port 3 of the foam aqueous solution radiation tube 4 for fire extinguishing, as in the second example. In addition, a first foaming net member 14a for passing the fire-extinguishing foam aqueous solution is disposed.
The first foam net member 14a of this example is formed of a flat mesh plate, and is attached to the top plate 7 via the support column 17 so as to be spaced apart from the top plate 7 and the radiation port 3 respectively. Yes.
Since the other configuration is the same as that of the second example, the description of the second example is cited.

  According to the foaming device for foam fire extinguishing equipment of this example configured as described above, the fire-extinguishing foam aqueous solution radiated from the radiation port 3 of the fire-extinguishing foam aqueous solution radiating tube 4 collides with the first foam-making net member 14a. By passing, it is effectively crushed and becomes small foamy water droplets that collide with the top plate 7 of the foaming chamber 5.

  In the present example, as in the second example, the first foam net member 14a is disposed in the space between the top plate 7 of the foaming chamber 5 and the radiation port 3 of the fire-fighting foam aqueous solution radiation tube 4. The fire-extinguishing foam aqueous solution radiated from the radiation port 3 of the fire-extinguishing foam aqueous solution radiation tube 4 collides with and passes through the first foaming net member 14 a in the process of diffusing in the foaming chamber 5. Furthermore, it will pass through the 1st foaming net member 14 in the state mixed with the air, the foam aqueous solution for fire extinguishing and the air are well mixed and foamed at a high magnification, and the diameter of the foamed foam is reduced and reduced. Long fire extinguishing foam is produced.

As in the second example, the action of the dam plate 11 synergizes with this action, and the foam aqueous solution for fire extinguishing and the air are mixed better, resulting in foaming at a higher magnification. A fire extinguishing foam is produced that is smaller and has a longer reduction time.
In addition, in this example, although the 1st foaming net member 14a is attached to the top plate 7 via the support | pillar 17, you may attach to the radiation port 3 via a support | pillar (not shown).

8 and 9 show a fourth example of the embodiment of the foaming apparatus for foam fire extinguishing equipment according to the present invention, FIG. 8 is a schematic longitudinal sectional view of this example, and FIG. 9 is the foam-forming net member shown in FIG. FIG.
The foaming apparatus for foam fire extinguishing equipment of this example is not different from the foaming apparatus for foam fire extinguishing equipment of the second example in the basic configuration, and the same configuration as in the second example will be described with the same reference numerals.

  In the foaming apparatus for foam fire-extinguishing equipment of this example, the second foaming net member 14 b that allows the fire-extinguishing foam aqueous solution radiated from the radiation port 3 to pass through the radiation port 3 of the fire-extinguishing foam aqueous solution radiation tube 4 is disposed. . The second foaming net member 14b is formed of a flat net plate and is attached by a mounting plate 18 so as to cover the opening of the radiation port 3.

As for the wire diameter of the 2nd foaming net member 14b, 0.85 mm-1.2 mm are preferable like the 1st foaming net member 14a. If the wire diameter is less than 0.85 mm, there is anxiety in terms of strength, and if it exceeds 1.2 mm, the workability is difficult and the cost increases.
Moreover, as for the opening of the mesh of the 2nd foaming net member 14b, 4 mm-12 mm are preferable. If the opening is less than 4 mm, small dust etc. may be mixed with the fire-fighting foam aqueous solution flowing through the fire-fighting foam aqueous solution radiation tube 4, and the clogging will easily clog the meshes of the second foaming net member 14 b. If it exceeds 12 mm, the impact effect of the fire-extinguishing foam aqueous solution on the second foaming net member 14b will be weakened, and it will be difficult to obtain the effect of crushing the fire-extinguishing foam aqueous solution into small foamy water droplets.
Since the other configuration is the same as that of the second example, the description of the second example is cited.

According to the foaming device for foam fire extinguishing equipment of this example configured as described above, when the fire-extinguishing foam aqueous solution radiated from the radiation port 3 of the fire-extinguishing foam aqueous solution radiation tube 4 is radiated from the radiation port 3, 2 By colliding with and passing through the foaming net member 14b, it is effectively crushed, becomes small foamy water droplets, radiates into the foaming chamber 5 and collides with the top plate 7 of the foaming chamber 5, It mixes well with air and foams at a high magnification, and fire extinguishing foams with a small foam diameter and a long reduction time are generated.
As in the second example, the action of the dam plate 11 synergizes with this action, and the foam aqueous solution for fire extinguishing and the air are mixed better, resulting in foaming at a higher magnification. A fire extinguishing foam is produced that is smaller and has a longer reduction time.

FIG. 10 shows a fifth example of the embodiment of the foaming device for foam fire extinguishing equipment according to the present invention, and FIG. 10 is a schematic vertical sectional view of the main part of this example. The basic configuration is the same as that of the second example to the fourth foam extinguishing apparatus for foam extinguishing equipment, and the same configuration as the second example to the fourth example will be described with the same reference numerals.

In the foaming apparatus for foam fire extinguishing equipment of this example, the first foaming net member 14a is disposed in the space between the top plate 7 of the foaming chamber 5 and the radiation port 3 of the foam aqueous solution radiation pipe 4 for fire extinguishing. The second foam network member 14b is disposed in the radiation port 3 of the foam aqueous solution radiation tube 4, respectively.
In this example, the 1st foaming net member 14a arrange | positioned in the space between the top plate 7 of the foaming chamber 5 and the radiation outlet 3 of the foam aqueous solution radiation pipe 4 for fire extinguishing is formed in the dome shape of a 2nd example. It is the same structure as the 1st foaming net member 14a comprised with the made net plate, and is attached to the top plate 7 by the same means.
Moreover, the 2nd foaming net member 14b arrange | positioned at the radiation port 3 of the foam aqueous solution radiation pipe 4 for fire extinguishing becomes the same structure as the 2nd foaming net member 14b comprised with the flat net | network board of the 4th example. And is attached to the radiation port 3 by the same means.

In addition, in this example, the 1st foaming net member 14a arrange | positioned in the space between the top plate 7 of the foaming chamber 5 and the radiation port 3 of the foam aqueous solution radiation pipe 4 for fire extinguishing is the dome shape of a 2nd example. Although it has the same structure as the 1st foaming net member 14a comprised by the net plate formed in this, it shall be the same structure as the 1st foaming net member 14b comprised by the flat net | network board of the 3rd example. You can also.
Since the other configuration is the same as the second to fourth examples, the description of the second to fourth examples is cited.

According to the foaming device for foam fire-extinguishing equipment of this example configured as described above, when the fire-extinguishing foam aqueous solution radiated from the radiation port 3 of the fire-fighting foam aqueous solution radiation tube 4 is radiated from the radiation port 3, First, since everything reliably collides with and passes through the second foaming net member 14b, it is effectively crushed and radiated into the foaming chamber 5 as small foamy water droplets, followed by the top plate of the foaming chamber 5 7 and the first foam-making net member 14a disposed in the space between the radiation outlet 3 of the fire-fighting foam aqueous solution radiant tube 4 and passes therethrough, so that the fire-fighting foam aqueous solution and the air mix well and at a high magnification. Foaming is produced, and a foam for fire extinguishing is produced in which the diameter of the foamed foam is small and the reduction time is long.
As in the second example, the action of the dam plate 11 synergizes with this action, and the foam aqueous solution for fire extinguishing and the air are mixed better, resulting in foaming at a higher magnification. A fire extinguishing foam is produced that is smaller and has a longer reduction time.

  As described above, according to the foaming device for foam fire extinguishing equipment according to the present invention, the foam aqueous solution for firefighting and air are well mixed and foamed at a high magnification, and the diameter of the foamed foam is small and the reduction time is long. High quality fire extinguishing foam with excellent foam performance can be produced.

DESCRIPTION OF SYMBOLS 1 Orifice 2 Air intake port 3 Radiation port 4 Fire extinguishing foam aqueous solution radiation tube 5 Foaming chamber 6 Connection part 7 Top plate 8 Cylindrical side wall 9 Bottom plate 10 Foam discharge port 11 Dam plate 12 L-shaped metal fitting 13 Flange 14a 1st foam network Member 14b Second foaming net member 15 Mounting plate 16, 17 Post 18 Mounting plate S1, S2, S3, S4 Gap

Claims (5)

On the primary side, there are provided an orifice and an air intake port for injecting a foam fire-extinguishing agent mixture mixed with water and a water-injecting foam aqueous solution radiation tube provided with a radiation port on the secondary side. A foaming chamber attached to the secondary side of the fire-fighting foam aqueous solution radiation tube, and an air intake port by negative pressure due to the injection of the foam fire-extinguishing agent mixture injected into the fire-fighting foam aqueous solution radiation tube from the orifice Air is sucked in from the inside, and the foam aqueous solution for fire extinguishing, in which the foam fire-extinguishing agent mixed solution and air are stirred and mixed, is radiated from the radiation port into the foaming chamber and collides with the top plate of the foaming chamber to cause foaming. In the foam extinguishing apparatus for foam fire extinguishing equipment that discharges the foam for fire extinguishing from the foam outlet opening in the cylindrical side wall of the chamber,
Located between the radiation outlet of the foam aqueous solution radiation tube for fire extinguishing and the foam outlet opening in the cylindrical side wall of the foaming chamber, the flow of foam toward the foam outlet is blocked and detoured. A barrier plate that flows to the foam discharge port is disposed in front of the foam discharge port, and a gap through which the foam foamed in the foam chamber passes is provided between the periphery of the barrier plate and the inner surface of the foam chamber. A foaming apparatus for foam fire extinguishing equipment. A gap S1 between both sides of the dam plate and the cylindrical side wall of the foam chamber, a gap S2 between the upper side of the dam plate and the top plate of the foam chamber, and the bottom of the dam plate and the The foaming apparatus for foam fire extinguishing equipment according to claim 1, wherein gaps S <b> 3 are respectively provided between the bottom plate of the foaming chamber. The foaming device for foam fire extinguishing equipment according to claim 1 or 2, wherein the barrier plate is in front of the foam discharge port, and a gap S4 is provided between the barrier plate and the foam discharge port. Wherein the space between the top plate of the foaming chamber and the exit opening of the fire fighting foam solution radiant tube, were placed first Zoawamo member passing extinguishing foam solution radiated from the emission opening claims The foaming apparatus for foam fire extinguishing equipment of any one of claim | item 1-3 . The emission opening of the fire fighting foam solution radiant tube, according to claim 1-4 placing the second Zoawamo member passing extinguishing foam solution radiated from the emission opening so as to cover the entire surface of the emission opening The foaming apparatus for foam fire-extinguishing equipment of any one of these.

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