JP6529889B2 - Foam foamer for fire extinguisher - Google Patents

Description

  The present invention relates to a foam foaming apparatus for fire extinguishing foam which mixes air with a foam extinguishing agent mixed solution in which foam extinguishing agent and water are mixed in a predetermined ratio to foam so as to generate and emit a extinguishing foam.

  A mixture of foam and fire extinguishing agent and water in a predetermined ratio is mixed with air to foam, and the foam is covered with a fire extinguishing foam to block fire and oxygen from the open air and extinguish the fire. ing. In such foam extinguishing, the foam for fire extinguishing is required to have foaming performance such as a relatively high expansion ratio and long reduction time. In the foaming ratio, covering the fire object with foam with a certain thickness and density is advantageous for fire extinguishing, and the longer the reduction time, the more difficult it is for the foam to break, so long-time fire object It is advantageous to extinguish the fire because it can cover the

In such foam fire extinguishing, a foam fire extinguishing foam foaming device mixes and foams air with a foam fire extinguishing agent mixed liquid in which a foam extinguishing agent and water are mixed in a predetermined ratio to generate and emit a extinguishing foam. It is used.
Conventionally, as a foam foaming device for fire extinguishing, an orifice part and an air intake are provided on the primary side, which injects a mixed solution of foam extinguishing agent mixed with the introduced foam extinguishing agent and water. The air is taken in from the air intake by the negative pressure by the injection of the foam extinguishing agent mixed liquid injected from the orifice part into the foam forming cylinder, and the foam extinguishing agent mixed liquid and the air are internally formed. There is a foaming device for fire extinguishing foam which stir-mixes and foams (see, for example, Patent Document 1).
As foam extinguishing agents used in foam extinguishing, protein fire extinguishing agents, synthetic surfactant extinguishing agents, aqueous film foam extinguishing agents, etc. are known. Among these, protein fire extinguishing agents have excellent heat resistance, so It is widely used as a foam fire extinguishing agent for foam fire extinguishing equipment such as tanks, but in a foam foaming device for fire extinguishing foam of the type as described in Patent Document 1, protein fire extinguishing agent foams compared to other foam fire extinguishing agents. Performance tends to be low.
For this reason, in the foaming apparatus for fire extinguishing foams, improvement in foaming performance is required, and as a means for improving the foaming performance, the foam cylinder is lengthened and the diameter is enlarged to cope with the problem.

  Further, as a foaming device for fire extinguishing foam which improves foaming performance, the orifice portion provided in the foaming cylinder is constituted by two orifice plates arranged at intervals, and the space between the two orifice plates is As a resonance chamber, the disturbance of the foam extinguishing agent mixture that has flowed through the holes in the primary orifice plate into the resonance chamber is amplified in the resonance chamber, and the foam extinguishing agent mixture diffused from the holes in the secondary orifice plate is made into a foam cylinder. There is one in which the foaming performance is improved by enhancing the mixing ratio of the foam extinguishing agent and the water so as to be jetted (see, for example, Patent Document 2).

JP, 2006-296491, A JP, 2014-94079, A

  In the above-described conventional foam foaming apparatus for fire extinguishing foam, as a means for improving the foaming performance, the interval between the orifice portions provided in the foaming cylinder can be increased by lengthening the foaming cylinder or enlarging the diameter. It corresponds by making the space between two orifice plates into a resonance chamber by comprising two orifice plates arranged.

However, increasing the length or diameter of the foaming cylinder has a problem that the foaming device for fire extinguishing foam can not be avoided.
In addition, when the orifice portion provided in the foaming cylinder is constituted by two orifice plates arranged at intervals, and the space between the two orifice plates is a resonance chamber, the resonance phenomenon occurs in a wide pressure range. Although it is possible to increase the volume of the resonance chamber by expanding the volume of the resonance chamber, it is possible to increase the volume of the resonance chamber by increasing the size of the fire extinguishing foam foaming device. There is a problem that

The present inventors particularly arrange two orifice plates in a foam cylinder and make the space between the two orifice plates a resonance chamber, in order to expand the pressure range in which the resonance phenomenon occurs, the volume of the resonance chamber In order to solve the problem caused by the increase of the pressure, the pressure and fire extinguishing agent mixed solution was added to the primary orifice plate as a result of repeated research on expanding the pressure range where the resonance phenomenon occurs without increasing the volume of the space. The resonance phenomenon occurs in a wide pressure range even in a small volume resonance chamber by sending it with an aperture area ratio of 0.3 to 0.8 between the hole in the orifice plate and the inner diameter of the primary channel of the primary orifice plate. I found it.
However, the inner diameter of the foam cylinder is set by the flow rate, and accordingly, depending on the inner diameter of the foam cylinder, the hole of the predetermined diameter in the primary orifice plate and the primary channel inner diameter of the primary orifice plate There are cases where it is difficult to fit the aperture area ratio of 0.3 to 0.8. Therefore, it has been found that by attaching the throttling cylinder to the primary orifice plate, the throttling area ratio can be reduced to 0.3 to 0.8 regardless of the inner diameter of the foaming cylinder, thereby forming the present invention. It reached.

  The object of the present invention is to improve the foaming performance and to obtain sufficient foaming even with a protein fire extinguishing agent, and to make it possible to generate a resonance phenomenon in a wide pressure range even in a small volume resonance chamber, thereby making the device compact It is an object of the present invention to provide a foaming device for fire extinguishing foam that has been made possible.

  In order to achieve the above object, the invention according to claim 1 is provided on the primary side with an orifice portion and an air intake for injecting a foam extinguishing agent mixed liquid in which the foam extinguishing agent and water introduced are mixed. The secondary side is made of a foam cylinder provided with a radiation port, and air is sucked from the air intake by negative pressure by the injection of the foam extinguishing agent mixed liquid injected from the orifice portion into the foam cylinder. In the foam foaming apparatus for fire extinguishing foam which stirs, mixes and foams a foam fire extinguishing agent mixture and air inside, the orifice portion is composed of a primary orifice plate and a secondary orifice plate, and the primary orifice plate and the secondary orifice plate A resonance chamber is formed between the next orifice plate, and a throttling cylinder is provided on the primary side of the primary orifice plate, and a throttling area ratio (CR) of the hole in the primary orifice plate to the inner diameter of the throttling cylinder is 0. Characterized in that it was set to 0.8.

According to the invention as set forth in claim 1, the orifice portion is constituted by the primary orifice plate and the secondary orifice plate, and the resonance chamber is formed between the primary orifice plate and the secondary orifice plate, and the resonance chamber is formed. The diaphragm cylinder is provided on the primary side of the primary orifice plate, and the diaphragm area ratio (CR) of the hole in the primary orifice plate to the inner diameter of the diaphragm cylinder is 0.3 to 0.8. The foam fire extinguishing agent mixed solution introduced into the foaming cylinder from the side has a relationship of a throttling area ratio of 0.3 to 0.8 between the hole in the primary orifice plate and the inner diameter of the throttling cylinder. The jet of the foam extinguishing agent mixed solution flowing into the resonance chamber from the hole in the orifice plate and flowing into the resonance chamber generates a contraction flow at a position near the primary orifice plate, and the contraction occurs in the resonance chamber. Distance from current to expansion Becomes short and, contraction of the jet of fire-extinguishing foams mixture at a position closer to the primary orifice plate, can be generated in a wide pressure range, the miniaturization of the resonance chamber is made possible by this.
The jet of the foam extinguishing agent mixed solution that has flowed into the resonance chamber turns from the contraction flow to the expansion flow in the resonance chamber and is jetted from the hole of the secondary orifice plate to the foaming cylinder, but is discharged into the resonance chamber Disturbance components are greatly amplified by the resonance phenomenon in the resonance chamber and the diffusion action of the jet accompanying the conversion from the contraction to the expansion, and the jet of the mixed foam extinguishing agent mixture is diffused as a large vortex. The foam extinguishing agent mixed liquid sprayed from the holes of the secondary orifice plate to the foam cylinder and sprayed from the holes of the secondary orifice plate diffuses in a mist state to the foam cylinder. Since the fluid is jetted in a swirling manner, it is extremely effectively mixed with the air drawn in from the air intake, and the foaming ratio is increased, and the foaming performance can be improved.
Further, the jets of the foam extinguishing agent mixed solution that has flowed into the resonance chamber are greatly amplified in disturbed components by the resonance phenomenon in the resonance chamber and the diffusion action of the jet accompanying the conversion from the contraction flow to the expansion flow, As a result, the resonance phenomenon can be generated in a wide pressure range even in a small volume resonance chamber, and the apparatus can be miniaturized.
In addition, since a throttle cylinder is provided on the primary side of the primary orifice plate, and the throttle area ratio (CR) between the hole in the primary orifice plate and the inner diameter of the throttle cylinder is 0.3 to 0.8, The throttling area ratio between the hole of a predetermined diameter in the primary orifice plate and the inner diameter of the primary side conduit of the primary orifice plate is easily and surely 0.3 to 0.8 regardless of the inner diameter of the foaming cylinder. It can fit in.

  The invention according to claim 2 is characterized in that the length of the diaphragm cylinder according to claim 1 is equal to or longer than the inner diameter of the diaphragm cylinder.

  According to the second aspect of the present invention, since the length of the throttling cylinder is equal to or longer than the inner diameter of the throttling cylinder, the foam extinguishing agent mixed liquid flowing into the resonance chamber is The jet stream can reliably generate a contraction flow at a position close to the primary orifice plate, and the disturbance component accompanying the conversion from the contraction flow to the expansion flow is greatly amplified, and a large vortex is reliably formed. It is sprayed in a mist state from the hole of the next orifice plate to the foaming cylinder.

  In the invention according to claim 3, a foaming chamber is attached to the secondary side of the foaming cylinder according to any one of claims 1 or 2, and the foaming chamber is provided with the above-mentioned foam cylinder. A top plate with which an aqueous solution for fire extinguishing foam mixed with air and a foam extinguishing agent mixed solution radiated into the foaming chamber from the radiation port collides with each other, and a cylindrical side wall of the foaming chamber opens in the foaming chamber It is characterized in that a foam outlet for releasing the extinguishing foam is provided.

  According to the invention of claim 3, the foaming chamber is attached to the secondary side of the foaming cylinder, and the foam radiated to the inside of the foaming chamber from the radiation port of the foaming cylinder is attached to the foaming chamber. A top plate with which a fire extinguishing foam aqueous solution obtained by stirring and mixing a fire extinguishing agent mixed solution and air collides with each other, and a foam outlet opening in the cylindrical side wall of the foaming chamber to release the extinguishing foam foamed in the foaming chamber Therefore, when the fire extinguishing foam aqueous solution radiated from the radiation port of the foam cylinder into the foaming chamber collides with the top plate, the foam of the fire extinguishing foam aqueous solution is further promoted to foam at a high magnification. It is possible to generate a high-quality extinguishing foam having a long reduction time, and release it from the foam outlet.

  The invention according to claim 4 is located between the radiation port of the foaming cylinder according to claim 3 and the foam discharge port opened in the tubular side wall of the foaming chamber. It is characterized in that a weir plate for blocking and diverting the flow of foam toward the foam outlet and flowing to the foam outlet is disposed in front of the foam outlet.

  According to the invention of claim 4, it is located between the radiation port of the foaming cylinder and the foam outlet opening in the tubular side wall of the foaming chamber, and is directed to the foam outlet. Since the weir plate which intercepts the flow of the foam and diverts it to flow to the foam discharge port is disposed in front of the foam discharge port, the aqueous solution for fire extinguishing foam radiated from the radiation port of the foam cylinder is the foam chamber Not only the collision with the top plate of the foam but also the collision with the scoop plate promotes the foaming, and the bubbles directed toward the foam outlet are blocked in flow by the scoop plate and bypass the scoop plate Since it flows to the bubble discharge port, the moving distance and residence time of the bubble in the foaming chamber become longer accordingly, and the bubble and air swirl in the foaming chamber, and the moving distance and time taken by the bubble become longer. Because of that, the foam solution for fire extinguishing and the air Mixed each other foamed at a high magnification, and can be the diameter of the foamed bubbles produces excellent fire fighting foam long foam performance of small reduction time.

  The invention according to claim 5 relates to radiation from the radiation port between the top plate of the foaming chamber and the radiation port of the foaming cylinder according to any one of claims 3 or 4 It is characterized in that at least one foam-forming net member for passing the prepared fire extinguishing foam aqueous solution is disposed.

According to the invention of claim 5, at least one of the fire extinguishing foam aqueous solutions radiated from the radiation port is allowed to pass between the top plate of the foaming chamber and the radiation port of the foaming cylinder. Since the foam network member is disposed, the aqueous solution for fire extinguishing foam emitted from the radiation port of the foam cylinder is effectively broken by colliding with and passing through the foam network member, and small foamy water droplets are formed. The aqueous solution for fire extinguishing foam and air mix well with each other and collide with the top plate of the foaming chamber to foam at a high magnification, and the diameter of the foamed foam is small and the foam performance is long for a long reduction time. An excellent fire fighting foam can be generated.
Further, by arranging the gutter plate in the bubbling chamber, the aqueous solution for fire extinguishing foam colliding with the top plate of the bubbling chamber collides with the gutter plate to promote the bubbling, and the bubbling is caused. Since the bubbles directed to the outlet are blocked by the weir plate and flow around the weir plate to the bubble outlet, the extinguishing foam aqueous solution and air mix better and foam at a higher magnification. And, it is possible to produce a fire extinguishing foam which is more excellent in foam performance with a small diameter of the foamed foam and a long reduction time.

  According to the foam foaming apparatus for fire extinguishing foam of the present invention, the foaming performance can be improved, and sufficient foaming can be obtained even with a protein fire extinguishing agent, and the resonance phenomenon is generated in a wide pressure range even in a small volume resonance chamber. This makes it possible to miniaturize the device, and furthermore, because of the simple configuration, it is easy to manufacture.

It is a schematic longitudinal cross-sectional view which shows the 1st example of embodiment of the foaming apparatus for fire extinguishing foams which concerns on this invention. It is a principal part enlarged view of the foaming apparatus for fire fighting foam shown in FIG. It is explanatory drawing which shows the radiation | emission state of the foam extinguishing agent mixed liquid in the cylinder for foaming of a 1st example. It is a schematic longitudinal cross-sectional view which shows the 2nd example of embodiment of the foaming apparatus for fire extinguishing foams which concerns on this invention. It is a schematic longitudinal cross-sectional view which shows the 3rd example of embodiment of the foam device for fire extinguishing foams which concerns on this invention. It is a principal part enlarged view of the 3rd example shown in FIG. It is a partially schematic longitudinal cross-sectional view which shows the other example of the foam-formation net member of a 3rd example. It is a partially schematic longitudinal cross-sectional view which shows the other example of the foam-formation net member of a 3rd example. It is a schematic longitudinal cross-sectional view which shows the 4th example of embodiment of the foam device for fire extinguishing foams which concerns on this invention.

Hereinafter, the present invention will be described in detail with reference to the embodiment of the foam foaming apparatus for fire extinguishing according to the present invention.
1 to 3 show a first example of the embodiment of the foamer for fire extinguishing foam according to the present invention, FIG. 1 is a schematic longitudinal sectional view of the first example, and FIG. 2 is a first example shown in FIG. The principal part enlarged view of one example, FIG. 3: is explanatory drawing which shows the radiation | emission state of the foam fire extinguishing agent mixed liquid in the cylinder for foaming of 1st Example.

The foam foaming apparatus for fire extinguishing foam of this example is a foaming apparatus called a vertical bubble foamer, and an orifice part for jetting a foam extinguishing agent mixed liquid in which the introduced foam extinguishing medicine and water are mixed on the primary side. 1 and an air intake port 2 are provided, and the secondary side is formed of a foam cylinder 4 provided with a radiation port 3.
In this example, a foaming chamber 5 in communication with the radiation port 3 is attached to the secondary side of the foaming cylinder 4, and the foam extinguishing agent mixed liquid injected from the orifice portion 1 into the foaming cylinder 4. Air is sucked from the air intake port 2 by negative pressure by the jet, and the foam extinguishing agent mixed solution and air are stirred, mixed and foamed inside, and emitted from the radiation port 3 into the foaming chamber 5.

  In the orifice portion 1, the primary orifice plate 6 and the secondary orifice which are provided on the primary side of the air intake port 2 in the foam cylinder 4 and which are disposed at intervals in the interior of the foam cylinder 4. It consists of a plate 7. A resonance chamber 8 is formed in the space between the primary orifice plate 6 and the secondary orifice plate 7. The primary orifice plate 6 and the secondary orifice plate 7 have holes 9 and 10.

A throttle cylinder 11 having an inner diameter R2 larger than the inner diameter R1 of the hole 9 in the primary orifice plate 6 is provided on the primary side of the primary orifice plate 6 so as to project in the axial direction of the foam cylinder 4 . The length L of the diaphragm cylinder 11 is preferably the same length as the inner diameter R2 of the diaphragm cylinder 11, or a length greater than or equal to the internal diameter R2.
If the length L of the throttling cylinder 11 is equal to the inner diameter R2 of the throttling cylinder 11 or longer than the inner diameter R2, the primary orifice plate 6 can be used as the jet of the foam extinguishant mixture flowing into the resonance chamber 8. The contraction flow can be generated reliably at a position close to When the length L of the throttling cylinder 11 is shorter than the inner diameter R2 of the throttling cylinder 11, the contraction flow generated in the jet of the foam extinguishant mixture flowing into the resonance chamber 8 becomes far from the primary orifice plate 6.
In the present example, the length L of the diaphragm cylinder 11 is set to the same length as the inner diameter R2 of the diaphragm cylinder 11.

In addition, the contraction area ratio (CR) of the inner diameter R1 of the hole 9 in the primary orifice plate 6 and the inner diameter R2 of the throttle cylinder 11 is set in the range of 0.3 to 0.8.
This throttling area ratio is the relationship between the throttling area ratio and the working pressure (MPa) of the hole 10 in the secondary orifice plate 7 serving as the injection port of the resonance chamber 8, and the foam extinguishant mixture liquid jetted from the resonance chamber 8 It asked for by the diffusion test of the jet stream.

試験結果は、○×で表している。
○は拡散が大きい。
×は拡散が小さい。
この試験結果から、絞り面積比（ＣＲ）が０．３〜０．８のとき、幅広い圧力域で共鳴現象を発生させ、共鳴室８から噴射された泡消火薬剤混合液の噴流を大きく拡散させることが確認された。 The test results are as shown in the following table.

The test results are represented by ××.
○ is large diffusion.
×: diffusion is small.
From this test result, when the throttling area ratio (CR) is 0.3 to 0.8, the resonance phenomenon is generated in a wide pressure range, and the jet of the foam extinguishing agent mixed solution injected from the resonance chamber 8 is largely diffused. That was confirmed.

  In the present embodiment, as shown in FIG. 2, the orifice portion 1 constituted by the primary orifice plate 6 and the secondary orifice plate 7 has the bottom portion 13 of the bottomed cylindrical body 12 as the secondary orifice plate 7, and the bottomed cylindrical body A primary orifice plate 6 provided with a throttle cylinder 11 is fixed to the opening 12 and integrally formed as an orifice portion 1, and the inside of the cylinder is a resonance chamber 8. The orifice portion 1 thus configured is inserted into and fixed to the primary side of the foaming cylinder 4. A seal ring 14 is interposed between the bottomed cylindrical body 12 constituting the foaming cylindrical body 4 and the orifice portion 1 and the foaming cylindrical body 4.

  In the foaming chamber 5 attached to the secondary side of the foaming cylinder 4, the top plate 15 and the cylinder are made to collide and cause the aqueous solution for fire extinguishing foam radiated from the radiation port 3 of the foaming cylinder 4 to collide. The cylindrical side wall 16 is formed with a side wall 16 and a bottom plate 17, and a foam discharge port 18 for releasing the extinguishing foam foamed in the foaming chamber 5 is opened. The top plate 15 has a function as an openable / closable lid (not shown).

  According to the foaming apparatus for fire extinguishing foam of this example configured as described above, as shown in FIG. 3, the foam extinguishing agent mixed liquid W introduced into the foaming cylinder 4 from the primary side is the primary orifice plate 6. Flows to the hole 9 in the primary orifice plate 6 having a restriction area ratio (CR) of the hole 9 in the cylinder to the inner diameter of the drawing cylinder 11 of 0.3 to 0.8, and the hole 9 in the primary orifice plate 6 and the restriction The jet flow of the foam extinguishing agent mixed liquid W which has flowed into the resonance chamber 8 from the hole 9 in the primary orifice plate 6 at a throttling area ratio of 0.3 to 0.8 with the inner diameter of the cylinder 11 flows into the resonance chamber 8 , Generate a contraction flow at a position close to the primary orifice plate 6.

  In this example, the length L of the throttling cylinder 11 is set to the same length as the inner diameter R2 of the throttling cylinder 11, and the primary orifice 6 plate is used as the jet of foam extinguishant mixture W flowing into the resonance chamber 8 The contraction flow is reliably generated near the

  The jet of the foam extinguishing agent mixed solution W ejected into the resonance chamber 8 is switched from contraction to expansion in the resonance chamber 8 and is jetted from the hole 10 of the secondary orifice plate 7 to the foaming cylinder 4. In the jet of the foam fire extinguishing agent mixture W discharged into 8, the disturbance component is greatly amplified by the resonance phenomenon in the resonance chamber 8 and the diffusion action of the jet accompanying the conversion from the contraction to the expansion, and a large eddy current And diffuse from the holes 10 of the secondary orifice plate 7 to the foaming cylinder 4.

  In this example, since the throttle area ratio (CR) of the inner diameter R1 of the hole 9 in the primary orifice plate 6 and the inner diameter R2 of the throttle cylinder 11 is set in the range of 0.3 to 0.8, a wide pressure A resonance phenomenon can be generated in the region, and the disturbance component of the jet of the foam extinguishing agent mixture W jetted into the resonance chamber 8 is greatly amplified by the resonance phenomenon, and the jet of the foam extinguishing agent mixture W becomes a large vortex Can be diffused as well.

The foam fire extinguishing agent mixture W sprayed from the hole 10 of the secondary orifice plate 7 is diffused in the form of mist in the foam cylinder 4 and is jetted as a swirl and is very effective with the air sucked from the air intake 2. The foaming ratio is increased and the foaming performance can be improved.
Further, the jet of the foam fire extinguishing agent mixed liquid W discharged into the resonance chamber 8 is greatly amplified in disturbing components by the resonance phenomenon in the resonance chamber 8 and the diffusion action of the jet accompanying the conversion from the contraction to the expansion. As a result, large vortices are diffused, so that even a small volume of resonance chamber 8 can generate resonance phenomena in a wide pressure range.
In this example, the throttle cylinder 11 is provided on the primary side of the primary orifice plate 6, and the throttle area ratio (CR) of the inner diameter R1 of the hole 9 in the primary orifice plate 6 to the inner diameter R2 of the throttle cylinder 11 is 0.3. Since it is set to ~ 0.8, the area ratio of the hole 9 of the predetermined diameter which is provided in the primary orifice plate 6 to the primary side inner diameter of the primary orifice plate 6 regardless of the inner diameter of the foaming cylinder 4 can be easily made It can be surely put in 0.3 to 0.8.

  Further, in the present embodiment, the orifice portion 1 has the bottom 13 of the bottomed cylinder 12 as the secondary orifice plate 7 and the primary orifice plate 6 provided with the throttling cylinder 11 in the opening of the bottomed cylinder 12 is fixed. Since they are integrated, they can be provided on the foaming cylinder 4 by a simple operation of inserting and fixing the orifice portion 1 on the primary side of the foaming cylinder 4.

  Further, in this example, since the orifice portion 1 is provided on the primary side from the air intake port 2, the foam extinguishing agent mixed liquid W sprayed from the orifice portion 1 and the air sucked from the air intake port 2 are extremely effective. As a result, the foaming ratio is further increased and the foaming performance can be further improved.

  Furthermore, in this example, the foaming chamber 5 communicating with the radiation port 3 is attached to the secondary side of the foaming cylinder 4, and the foaming chamber 5 is emitted from the radiation port 3 of the foaming cylinder 4. It comprises a top plate 15, a cylindrical side wall 16 and a bottom plate 17 for causing an aqueous solution for fire extinguishing to collide and foam, and the cylindrical side wall 16 is a foam discharge port 18 for releasing the fire extinguishing foam in the foaming chamber 5. Is open, the aqueous solution for fire extinguishing foam emitted from the radiation port 3 of the foaming cylinder 4 into the foaming chamber 5 collides with the top plate 15 to further promote the foaming of the aqueous solution for fire extinguishing foam to be high. It is possible to foam at a magnification ratio to generate a high-quality extinguishing foam having a long reduction time and to discharge it from the foam outlet.

FIG. 4 is a schematic longitudinal sectional view showing a second example of the embodiment of the foaming apparatus for fire extinguishing foam according to the present invention.
In this example, it is located between the radiation port 3 of the foaming cylinder 4 and the foam outlet 18 opened in the tubular side wall 16 of the foaming chamber 5 to block the flow of foam toward the foam outlet 18 and bypass A weir plate 19 is provided which is made to flow to the bubble discharge port 18.
In this example, the cover plate 19 is attached to the flange 21 formed in the radiation port 3 of the foaming cylinder 4 via the L-shaped bracket 20, and the radiation port 3 of the foaming cylinder 4 and the foaming chamber 5 It is disposed so as to be located between the foam outlet 18 opened in the cylindrical side wall 16.

Between the periphery of the scissor plate 19 arranged in this manner and the inner surface of the foaming chamber 5, a gap S for passing the foamed foam in the foaming chamber 5 is opened. The gap S is set to an interval within a range that does not hinder the required flow rate of the extinguishing foam discharged from the foam outlet 18.
In this example, a wide gap S is opened between both sides of the gutter plate 19 and the cylindrical side wall 16 of the bubbling chamber 5, and between the upper side of the gutter plate 19 and the top plate 15 of the bubbling chamber 5, and Although a narrow gap S is provided between the bottom of the plate 19 and the bottom plate 17 of the foaming chamber 5, a gap is necessarily created between the upper side of the sheathing plate 19 and the top plate 15 of the foaming chamber 5. It does not have to be.
Moreover, although the weir plate 19 is a curved quadrilateral plate along the cylindrical side wall 16 of the foaming chamber 5 in this example, it may be a flat plate.

  According to the foaming apparatus for fire extinguishing foam of this example configured as described above, the fire extinguishing foam aqueous solution radiated from the radiation port 3 of the foaming cylinder 4 only collides with the top plate 15 of the foaming chamber 5 Otherwise, the foam is promoted by colliding with the weir plate 19 and the bubbles directed toward the foam outlet 18 are blocked by the weir plate 19 and bypass the weir plate 19 and open around the weir plate 19. Flows to the bubble outlet 18 through the gap S. As a result, the moving distance and residence time of the foam in the foaming chamber 5 become longer, and the moving distance and time in which the foam and the air swirl in the foaming chamber 5 are lengthened. It mixes well, the expansion ratio is high, and the diameter of the foamed foam is small, and the extinguishing foam having a long reduction time is generated.

5 and 6 show a third example of the embodiment of the foaming apparatus for fire extinguishing foam according to the present invention, and FIG. 5 is a schematic longitudinal sectional view of the third example, and FIG. It is a principal part enlarged view of three examples.
In this example, between the top plate 15 of the foaming chamber 5 and the radiation port 3 of the foaming cylinder 4, a foam forming net member 22 for passing the aqueous solution for fire extinguishing foam radiated from the radiation port 3 is disposed There is.
In this example, the foam-forming net member 22 is disposed in the space between the top plate 15 of the foaming chamber 5 and the radiation port 3 of the foaming cylinder 4. The foam-forming net member 22 of this example is constituted by a net plate formed in a dome shape, and is attached to the top plate 15 via the attachment plate 23 so that the opening side thereof is applied to the top plate 15. Further, between the foam-forming net member 22 and the top plate 15, a support for supporting the foam-forming net member 22 from the inside at a central position in order to prevent deformation of the foam-forming net member 22 due to a collision of the fire extinguishing foam solution. 24 are provided.
The foam-forming net member 22 has a wire diameter and a mesh necessary for breaking the aqueous solution for fire-fighting foam colliding with the foam-forming net member 22 and passing it as small foamy water droplets.

  According to the foaming apparatus for fire extinguishing foam of this example configured as described above, the aqueous solution for fire extinguishing foam emitted from the radiation port 3 of the foaming cylinder 4 collides with the foam forming net member 22 and passes through. Effectively, it breaks into small foamy water droplets and collides with the top plate 15 of the foaming chamber 5.

  In this example, since the foam-forming net member 22 is disposed in the space between the top plate 15 of the foaming chamber 5 and the radiation port 3 of the foaming cylinder 4, it is emitted from the radiation port 3 of the foaming cylinder 4 The aqueous solution for fire extinguishing foam collides with and passes through the foam-forming net member 22 in the process of diffusing in the foaming chamber 5, and passes through the foam-forming net member 22 in a state further mixed with air in the foam chamber 5. As a result, the aqueous solution for fire extinguishing foam and air mix well and foam at a high magnification, and the diameter of the foamed foam is small, and the fire extinguishing foam having a long reduction time is generated.

In particular, in this example, the foam-forming net member 22 is formed of a mesh plate formed in a dome shape, and is attached to the top plate 15 so that the opening side thereof is applied to the top plate 15. The foamy water droplets, which are emitted from the radiation port 3 and pass through the foam network member 22 and enter the dome, collide with the top plate 15 of the foaming chamber 5, pass through the foam network member 22 again, and As it goes out, it passes twice through the foam forming net member 22, and the aqueous solution for fire extinguishing foam and air mix better and foam at a high magnification, and the diameter of the foamed foam becomes smaller and reduction A long time extinguishing foam is produced.
In this example, the foam network member 22 is a mesh plate formed in a dome shape, and is attached to the top plate 15 so that the opening side thereof is applied to the top plate 15, as shown in FIG. The foam network member 22 may be a flat screen plate, and may be attached to the top plate 15 via the support 25 so as to leave a predetermined distance from each of the top plate 15 and the radiation port 3, As shown in FIG. 8, even if the foam-forming net member 22 is formed of a flat net plate and attached to the radiation port 3 of the foaming cylinder 4 by a mounting plate 26 so as to cover the opening of the radiation port 3. Good.

FIG. 9 is a schematic longitudinal sectional view showing a fourth example of the embodiment of the foaming apparatus for fire extinguishing foam according to the present invention.
In this example, the foam directed to the foam outlet 18 shown in the second example is located between the radiation port 3 of the foaming cylinder 4 and the foam outlet 18 opened in the tubular side wall 16 of the foaming chamber 5. In the third example, between the top plate 15 of the foaming chamber 5 and the radiation port 3 of the foaming cylinder 4 is disposed a shield plate 19 which intercepts the flow of the water and diverts it to flow to the foam outlet 18. As shown, a foam forming net member 22 for passing the aqueous solution for fire extinguishing foam radiated from the radiation port 3 is disposed.

According to the foaming apparatus for fire extinguishing foam of this example configured as described above, the aqueous solution for fire extinguishing foam emitted from the radiation port 3 of the foaming cylinder 4 into the foaming chamber 5 is first of all formed by the foam forming net member 22 The water solution for fire extinguishing and the air are mixed well and foamed at a high magnification by colliding with and passing through and passing through the top plate 15 of the foaming chamber 5 as small foamy water droplets. Subsequently, the foam foam in the foaming chamber 5 collides with the scoop plate 19 so that the foam is promoted, and the foam directed toward the foam outlet 18 is blocked in flow by the scoop plate 19 and the scoop plate 19. By flowing to the foam outlet 18 through the gap S opened around the gutter plate 19 so that the extinguishing foam aqueous solution and air mix better and foam at a higher magnification, and foaming. Small bubbles with a long reduction time More excellent fire-extinguishing foam to function is generated.
Although the foam-forming net member 22 shown in FIG. 5 is arranged in the fourth example shown in FIG. 9, the foam-forming net member 22 shown in FIGS. 7 and 8 may be arranged.

  In addition, although the foaming apparatus called the vertical foamer was demonstrated as an Example of the foam apparatus of the foam for fire fighting in this example, it is not restricted to this.

DESCRIPTION OF SYMBOLS 1 orifice part 2 air intake 3 radiation port 4 foam cylinder 5 foam chamber 6 primary orifice plate 7 secondary orifice plate 8 resonance chamber 9, 10 hole 11 throttle cylinder 12 bottomed cylinder 13 bottom 14 seal ring 15 Plate 16 cylindrical side wall 17 bottom plate 18 foam outlet 19 plate 20 L-shaped bracket 21 flange 22 foam network member 23 mounting plate 24, 25 support 26 mounting plate

Claims (5)

The primary side is provided with an orifice for injecting a mixed foam solution mixed with the foam and the water introduced, and an air intake, and the secondary side is formed of a foam cylinder provided with a radiation port. Air is sucked from the air intake by negative pressure by the injection of the foam extinguishing agent mixed solution injected into the foam cylinder from the orifice portion, and the foam extinguishing agent mixed solution and air are stirred and mixed and foamed inside. In the foam device for
The orifice portion is composed of a primary orifice plate and a secondary orifice plate, a resonance chamber is formed between the primary orifice plate and the secondary orifice plate, and a throttling cylinder is provided on the primary side of the primary orifice plate. A foaming device for fire extinguishing foam characterized in that a throttling area ratio (CR) of a hole in the primary orifice plate to an inner diameter of the throttling cylinder is 0.3 to 0.8.   The foaming device for fire extinguishing foam according to claim 1, wherein the length of the throttling cylinder is equal to or longer than the inner diameter of the throttling cylinder.   A foaming chamber was attached to the secondary side of the foaming cylinder, and the foam extinguishing agent mixed liquid radiated into the foaming chamber from the radiation port of the foaming cylinder was stirred and mixed in the foaming chamber. 3. A top plate which is made to collide with an aqueous solution for fire extinguishing foam, and a foam discharge port which is opened on the cylindrical side wall of the foaming chamber and releases the fire extinguishing foam in the foaming chamber. The foam device for fire extinguishing foam according to any one of the preceding claims.   It is located between the emission port of the foaming cylinder and the foam outlet opening on the tubular side wall of the foaming chamber, and blocks or diverts the flow of foam toward the foam outlet. The foam | foam foaming apparatus of the foam for fire extinguishing of Claim 3 which arrange | positioned the weir plate which flows to a discharge port in front of the said foam | form discharge port. Between the top plate of the foaming chamber and the radiation port of the foaming cylinder, at least one foam forming net member is disposed, through which the aqueous solution for fire extinguishing foam radiated from the radiation port is allowed to pass. The foaming device for fire extinguishing foams according to any one of claims 3 or 4.

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