JP2015100483A - Fire extinguishing agent tank - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fire extinguishing agent tank which can sequentially discharge a low-viscosity fire extinguishing agent and a high-viscosity fire extinguishing agent.SOLUTION: A fire extinguishing agent tank 1 includes: a tank part 2; a fire extinguishing agent 3 stored inside the tank part 2; a discharging part 4 for discharging the fire extinguishing agent 3 to the outside of the tank part 2; a leading pipe 5 which extends inside the tank part 2 in a vertical direction, has an inflow port 5a in which the fire extinguishing agent 3 stored inside the tank part 2 flows, and leads the fire extinguishing agent 3 which flows in from the inflow port 5a to the discharging part 4; and a pressurizing means 6 which increases a pressure inside the tank part 2 by a pressure gas. In the fire extinguishing agent tank, a low-viscosity fire extinguishing agent 3a which forms a layer in an upper part and a high-viscosity fire extinguishing agent 3b which forms a layer in a lower part are stored as the fire extinguishing agent 3 inside the tank part 2, and the leading pipe 5 which is a communication passage forming part 5b provided in the lower part and communicates the layer of the low-viscosity fire extinguishing agent 3a to the inflow port 5a in the layer of the high-viscosity fire extinguishing agent 3b for forming a communication passage 3c where the low-viscosity fire extinguishing agent 3a flows is provided.

Description

  The present invention relates to a fire extinguishing agent tank that stores a fire extinguishing agent inside and discharges the extinguishing agent to outside by pressure gas.

  In general, the extinguishant tank is configured so that an internal extinguishing agent can be discharged to the outside using a pressure gas as a pressure source. There are an accumulator type and a pressurized type as the pressure system. In either system, the pressure inside the tank is increased by the pressure gas, thereby pressing the fire extinguisher and releasing it to the outside.

  In this fire extinguisher tank, water is generally used as a fire extinguisher. When extinguishing with water as a fire extinguishing agent, the fire is extinguished by spreading water around the fire source and its surroundings, and the surrounding fire is prevented from spreading by wetting around the fire source.

  By the way, in order to improve the efficiency of fire extinguishing with water and prevention of fire spread, it is considered to add an additive for increasing the viscosity of the water to enhance the adhesion to the fire extinguishing target. For example, the technique disclosed in Japanese Patent Application Laid-Open No. 2011-167357 (Patent Document 1) proposes a gel-containing fire extinguishing water prepared by adding a gelling agent to water as such a fire extinguishing agent.

JP 2011-167357 A

  However, in the case of a fire extinguisher with increased water viscosity, the dispersibility of the liquid is low, and therefore, when sprayed over a wide range, the efficiency is considered to be low. In addition, in the case of a fire extinguisher with increased water viscosity, it is considered that the cooling effect is weakened because the fire extinguisher hardly penetrates into combustible materials.

  Therefore, both the fire extinguisher with no viscosity increase added to water and the viscosity remains low, and the fire extinguisher added with water viscosity increase and the viscosity increased are sequentially sprayed. Thus, it is conceivable that after the fire extinguisher with a low viscosity is released first to cool the combustible material, the fire extinguisher whose viscosity is increased is released to attach the fire extinguisher to the combustible material.

  In the present invention, an additive for increasing viscosity is not added to water, a fire extinguisher whose viscosity remains low (hereinafter referred to as “low viscosity fire extinguisher”), and an additive for increasing viscosity to water are added. It is an object of the present invention to provide a fire extinguisher tank capable of sequentially discharging a fire extinguisher whose viscosity is increased (hereinafter referred to as “high viscosity fire extinguisher”).

  The present invention includes a tank part, a fire extinguisher stored inside the tank part, a discharge part for releasing the fire extinguishing agent to the outside of the tank part, and the vertical extension inside the tank part, An inflow port through which the extinguishing agent stored inside the tank unit flows, a guide pipe for guiding the extinguishing agent flowing in from the inflow port to the discharge unit, and an internal pressure of the tank unit In a fire extinguisher tank equipped with a pressure means to be increased by pressure gas, a low-viscosity fire extinguisher that forms a layer upward and a high-viscosity fire extinguisher that forms a layer below are stored in the tank portion as the fire extinguisher The guide pipe is a communication passage forming portion provided at a lower portion thereof, and the low viscosity extinguishing agent layer and the inflow port communicate with the high viscosity extinguishing agent layer, A communication path forming part that forms a communication path through which the viscosity extinguishing agent flows It is fire-extinguishing agent tank, characterized in that provided.

  Further, the present invention is the fire extinguishing agent tank, wherein the communication path forming portion is a protruding portion protruding around the guide pipe.

  Moreover, this invention is a fire extinguisher tank characterized in that the protruding portion is a ring-shaped large-diameter portion.

  Further, according to the present invention, the communication path forming portion forms the communication path when moving from the low-viscosity fire extinguisher layer to the high-viscosity fire extinguisher layer. It is a tank.

  In this invention, a low-viscosity fire extinguisher that forms a layer above and a high-viscosity fire extinguisher that forms a layer below are stored as extinguishing agents inside the tank portion, and the induction tube is made of a high-viscosity extinguishing agent. The layer is equipped with a communication passage forming part that connects the low-viscosity fire extinguisher layer and the inlet of the guide pipe and forms a communication path through which the low-viscosity fire extinguisher flows. When discharging from the discharge part through the guide pipe to the outside, first, the low-viscosity fire extinguishing agent is caused to flow into the guide pipe from the inlet through the communication path formed by the communication path forming part, and from the discharge part through the guide pipe. Then, as soon as the low-viscosity fire extinguishing agent is exhausted, the high-viscosity fire extinguishing agent can flow into the induction pipe from the inlet, and can be released to the outside through the induction pipe.

  Therefore, according to the present invention, it is possible to provide a fire extinguisher tank capable of sequentially releasing a low viscosity fire extinguisher and a high viscosity fire extinguisher with a single one.

1 shows an example of a fire extinguisher tank according to the present invention, and a longitudinal section of the entire fire extinguisher tank in a state where a low-viscosity extinguishing agent (upper layer) and a high-viscosity extinguishing agent (lower layer) are filled as extinguishing agents to be stored. FIG. FIG. 2 shows the same as above, and corresponds to FIG. 1 when an upper-layer low-viscosity fire extinguisher is released. FIG. 3 is an enlarged view of a main part of FIG. 2 including a communication path that communicates an upper layer of a low-viscosity fire extinguisher layer and an inlet of a guide pipe in a lower high-viscosity fire extinguisher layer. FIG. 2 is a view corresponding to FIG. 1 when the upper layer low-viscosity extinguishing agent is released and the lower layer high-viscosity extinguishing agent is released. It is the same as the above and it is a principal part enlarged view of the ring view of the guide tube which is an example of a communicating path formation part.

  Hereinafter, a case where an aspect of an embodiment of the present invention is applied to a pressure-accumulating fire extinguisher tank will be described with reference to the drawings. The present invention can also be applied to a pressurized fire extinguisher tank, as will be described later.

  The fire extinguisher tank 1 includes a tank part 2, a fire extinguisher 3 stored inside the tank part 2, a discharge part 4 that discharges the fire extinguishing agent 3 to the outside of the tank part 2, and a vertical direction inside the tank part 2. And an inflow pipe 5a into which the extinguishing agent 3 stored in the tank portion 2 flows, and guides the extinguishing agent 3 flowing in from the inflow port 5a to the discharge section 4. In the present embodiment, which is an accumulator, and is a pressure accumulating type, pressure gas (pressurized nitrogen gas) is used as pressure means for increasing the pressure inside the tank unit 2 with pressure gas. Etc.) are introduced into the tank part 2.

  In the present embodiment, the discharge portion 4 is provided on the upper portion of the lid portion 2b that closes the upper opening 2a of the tank portion 2. The discharge nozzle 4a discharges the extinguishing agent 3 to the outside, and the discharge nozzle. 4a has a communication pipe 4b that communicates with a connection port to which the upper end of the siphon pipe 5 is connected (this discharge part 4 is a valve part that normally closes the communication pipe 4b). And an operation portion for opening the valve portion in the event of a fire, but their illustration is omitted). Further, in the siphon tube 5, the upper end portion penetrates the lid portion 2 b of the tank portion 2 and is connected to the discharge portion 4 as described above, but the lower end portion reaches the vicinity of the bottom portion of the tank portion 2, and the lower end portion thereof The inlet 5a through which the extinguishing agent 3 flows is provided.

  And in the fire extinguisher tank 1, the low viscosity fire extinguisher 3a which forms a layer above, and the high viscosity fire extinguisher 3b which forms a layer below are stored in the inside of the tank part 2 as said fire extinguisher 3. The siphon tube 5 is a communication passage forming portion provided in the lower part thereof, and communicates the layer of the low-viscosity extinguishing agent 3a with the inlet 5a in the layer of the high-viscosity extinguishing agent 3b, and the low-viscosity extinguishing agent 3a. The communication path formation part 5b which forms the communication path 3c which flows is provided.

  Here, the “low-viscosity fire extinguishing agent” means a fire extinguishing agent that does not contain an additive that increases viscosity in water and has a low viscosity, as described above. Specifically, water that is generally used as fire extinguishing water (such as tap water) can be used as it is. In addition, as described above, the “high viscosity fire extinguisher” means an extinguisher whose viscosity is increased by adding an additive that increases the viscosity to water. As the high viscosity fire extinguisher 3b, It is possible to use water prepared by adding an additive for thickening, which includes a gelling agent such as a polymer water-absorbing polymer, to the water. Other additives for thickening include colloidal hydrous silicates that provide thixotropic properties in water (the ability to turn gels into fluid sols by stirring or shaking). Additives including compounds made of minerals (eg, smectite and bentonite) and silicates thereof can also be used. It should be noted that the two types of extinguishing agents having different viscosities may be used to constitute a “low viscosity extinguishing agent” and a “high viscosity extinguishing agent”, and other extinguishing agents different from those exemplified above should be used. Also good.

  In the present embodiment, the communication path forming portion 5b provided at the lower portion of the siphon tube 5 has a circular outer shape that protrudes outward from the periphery of the inlet 5a at the lower end of the siphon tube 5. It is a ring-shaped large diameter part (refer FIG. 5). In the communication path forming portion 5b, the size of the large diameter portion can be changed as appropriate according to the flow rate of the extinguishing agent to be discharged, and the shape can be changed as appropriate as described later.

  In addition, as shown in FIG. 1, the fire extinguishing agent tank 1 always stores the low viscosity extinguishing agent 3a and the high viscosity extinguishing agent 3b as the extinguishing agent 3 inside the tank part 2. In this embodiment which is a pressure accumulation type, it is also filled with pressure gas. Specifically, the pressure gas is introduced and filled in the space above the low viscosity extinguishing agent 3a in the upper layer in the extinguishing agent 3 inside the tank portion 2 from the introduction pipe 6, as shown in FIG. The low-viscosity extinguishing agent 3a and the high-viscosity extinguishing agent 3b are always pressed downward from above the low-viscosity extinguishing agent 3a (see arrows). Pressure that causes the viscosity extinguisher 3a and the high viscosity extinguisher 3b to flow into the siphon pipe 5 from the inlet 5a at the lower end of the siphon pipe 5, is guided to the discharge section 4 through the siphon pipe 5, and is discharged from the discharge nozzle 4a. To function as a source.

  The fire extinguishing agent tank 1 is configured as described above. As the extinguishing agent 3, a low viscosity extinguishing agent 3a that forms a layer on the upper side and a high viscosity extinguishing agent 3b that forms a layer on the lower side are inside the tank unit 2. The siphon tube 5 is a communication path forming portion provided in the lower part thereof, and the layer of the low viscosity extinguishing agent 3a and the inlet 5a communicate with the layer of the high viscosity extinguishing agent 3b, By providing the communication passage forming portion 5b that forms the communication passage 3c through which the low-viscosity fire extinguishing agent 3a flows, the low-viscosity fire extinguishing agent 3a and the high-viscosity fire extinguishing agent 3b are pressed by the pressure gas and discharged through the siphon tube 5. When discharging to the outside from 4, first, as shown in FIGS. 2 and 3, the siphon pipe 5 is connected to the low viscosity extinguishing agent 3 a from the inflow port 5 a through the communication path 3 c formed by the communication path forming portion 5. Into the inside and out of the discharge part 4 through the siphon tube 5 Then, as shown in FIG. 4, as soon as the low-viscosity extinguishing agent 3a disappears, the high-viscosity extinguishing agent 3b flows into the siphon tube 5 from the inflow port 5a. It can be made to discharge | release outside from the discharge | release part 4 through.

  That is, the fire extinguisher tank 1 stores, as the fire extinguisher 3, a low viscosity fire extinguisher 3a that forms a layer above and a high viscosity fire extinguisher 3b that forms a layer below, inside the tank unit 2. The pipe 5 is a communication passage forming portion provided in the lower part thereof, and the low viscosity extinguishing agent 3a and the inflow port 5a are communicated with the high viscosity extinguishing agent 3b, and the low viscosity extinguishing agent 3a flows. By providing the communication path forming portion 5b that forms the communication path 3c, the low-viscosity fire extinguishing agent 3a and the high-viscosity fire extinguishing agent 3b can be sequentially discharged by one.

  In the fire extinguisher tank 1, as described above, the low-viscosity fire extinguisher 3a flows through the layer of the low-viscosity fire extinguishing agent 3a and the inlet 5a through the communication path forming portion 5a. A passage 3c is formed. The communication path 3c is inserted into the tank portion 2 through the upper opening 2a of the tank portion 2 while the tank portion 2 is filled with the low-viscosity extinguishing agent 3a and the high-viscosity extinguishing agent 3b. The formation portion 5a can be formed by moving from the upper layer of the low-viscosity fire extinguishing agent 3a to the lower layer of the high-viscosity fire extinguishing agent 3b. By moving in such a manner, the high-viscosity extinguishing agent 3b is pushed away, and the low-viscosity extinguishing agent 3a flows into the space formed thereby. Even when the low-viscosity extinguishing agent 3a and the high-viscosity extinguishing agent 3b are filled in the tank unit 2 while the siphon tube 5 is inserted into the tank unit 2, the siphon tube 5 is moved up and down. If the communicating path forming portion 5a is moved from the low viscosity extinguishing agent 3a layer to the high viscosity extinguishing agent 3b layer as described above, the communicating path 3c can be formed.

  Here, the phenomenon in which the communication path 3c through which the low-viscosity extinguishing agent 3a flows in the layer of the high-viscosity extinguishing agent 3b is formed by the communication path forming portion 5a is caused by the difference in viscosity between the two extinguishing agents (difference in fluidity). Although it is understood, the occurrence of the phenomenon has been confirmed by experiments.

[Experimental example]
The experiment was carried out by preparing a fire extinguishing agent tank experimental device according to the present invention that allows the inside of the tank portion to be visually recognized from the outside (the shape of the communication passage forming portion is the communication passage forming portion 5a in the fire extinguisher tank 1). The outer shape is the same as the circular shape of the ring). The extinguishing agent used was water (tap water) as a low viscosity extinguishing agent and a 5% synthetic smectite aqueous solution as a high viscosity extinguishing agent. The viscosity of each fire extinguisher was measured with a B-type viscometer. The viscosity of water used as a low-viscosity fire extinguisher was 25 ° C (because water changes in viscosity with water), 0.890 mPas · s, high viscosity fire extinguisher The viscosity of the 5% aqueous solution of synthetic smectite used was 50000 mPas · s at a spindle speed of 6 rpm and 6500 mPas · s at the same speed of 60 rpm. Synthetic smectite brings thixotropy to water, and the viscosity of the aqueous solution varies depending on the number of spindle revolutions as described above.

  As a result of the experiment, the siphon tube was inserted into the tank part of the experimental device, and the communication path forming part was moved from the lower low-viscosity fire extinguisher layer to the lower high-viscosity fire extinguisher layer. It was confirmed that a communication path through which the low-viscosity fire extinguisher flows was formed by communicating the low-viscosity fire-extinguishing agent layer and the siphon tube inlet in the agent layer. It was also confirmed that the communication path was stably and continuously formed over time. Moreover, when these extinguishing agents were pressed from above by pressure gas, first, the low-viscosity extinguishing agent flows into the siphon pipe from the inlet through the communication path, and as soon as the low-viscosity extinguishing agent disappears, then the high-viscosity extinguishing agent It was confirmed that the agent entered the siphon tube from the inlet. That is, it was confirmed that the phenomenon as described for the fire extinguisher tank 1 occurred.

  Furthermore, an experiment using a synthetic smectite 3% aqueous solution (viscosity was 24800 mPas · s at a spindle rotation speed of 6 rpm, 2650 mPas · s at the same rotation speed of 60 rpm, and the viscometer used was the same as described above) was performed as a high-viscosity fire extinguisher. The result of the experiment was the same as that described above.

  The adhesion of both aqueous solutions used as high-viscosity fire extinguishing agents to the objects to be sprayed is as follows: in the case of 5% aqueous solution of synthetic smectite, even if the surface is somewhat smooth, in the case of 3% aqueous solution of synthetic smectite, Thus, there is a difference that it adheres if the surface friction is large.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to said embodiment.

  About the shape of the communicating path formation part 5b, it can change suitably in the range which can form the communicating path 3c as above-mentioned. For example, the outer shape can be a polygon instead of a circle, and the outer shape can be a shape in which a plurality of short pieces project radially around instead of a circle or polygon that is continuous in the circumferential direction. You can also.

  As described above, the present invention can also be applied to a pressurized fire extinguisher tank. In that case, for example, a pressurization gas cylinder filled with pressure gas is connected to the end of the introduction pipe 6 exposed to the outside in the above embodiment via an opening / closing mechanism, and the pressurization gas cylinder is connected to the outside of the tank unit 2. Alternatively, instead of providing the introduction pipe 6, a pressurizing gas cylinder including the discharge part may be provided inside the tank part 2.

  In addition, the communication path is stably and continuously formed over time. However, in order to ensure that the communication path is formed during use, the siphon tube 5 is placed in a tank so that it can be moved up and down when necessary. It is good also as a structure couple | bonded with the part 2. FIG.

1: Fire extinguishing agent tank 2: Tank part 2a: Upper opening 2b: Lid part 3: Fire extinguishing agent 3a: Low viscosity extinguishing agent 3b: High viscosity extinguishing agent 4: Discharge part 4a: Discharge nozzle 4b: Communication pipe 5: Siphon pipe 5a : Inlet 5b: Communication passage forming part 6: Introducing pipe

Claims (4)

A tank part, a fire extinguishing agent stored inside the tank part, a discharge part for releasing the fire extinguishing agent to the outside of the tank part, and an internal extension of the tank part, An inflow port through which the extinguishing agent stored therein flows in, a guide pipe that guides the extinguishing agent that has flowed in from the inflow port to the discharge unit, and an internal pressure of the tank unit is increased by pressure gas In a fire extinguisher tank with pressure means,
Inside the tank part is stored a low-viscosity fire extinguisher that forms a layer above the extinguishing agent and a high-viscosity fire extinguishing agent that forms a layer below,
The guide pipe is a communication passage forming portion provided in a lower portion thereof, and the low-viscosity extinguishing agent layer and the inflow port communicate with the high-viscosity extinguishing agent layer, A fire extinguisher tank characterized by comprising a communication path forming part for forming a flowing communication path.   The fire extinguishing agent tank according to claim 1, wherein the communication path forming portion is a protruding portion protruding around the guide pipe.   The fire extinguishing agent tank according to claim 2, wherein the protruding portion is a ring-shaped large-diameter portion.   4. The communication path forming portion forms the communication path when moving from the low-viscosity fire extinguishing agent layer to the high-viscosity fire extinguishing agent layer. Fire extinguisher tank described in 1.

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