Firefighting equipment

Abstract

The present invention provides a fire extinguishing device that prevents backflow and leakage of fire extinguishing fluid from the base end of the hose, even when the hose is removed from the tank during tank replacement. [Solution] The fire extinguishing device 1 according to the present invention comprises a tank 7 that houses an inner bag 5 filled with fire extinguishing liquid 3, and a discharge passage 9 for discharging the fire extinguishing liquid 3 from the inner bag 5. By filling the gap between the inner bag 5 and the inner surface of the tank 7 with gas, the inner bag 5 is compressed and the fire extinguishing liquid 3 is discharged from the discharge passage 9. The discharge passage 9 comprises a hose 13 with a nozzle 11 at its tip, and a guide pipe 16 whose upper end is connected to the base end of the hose 13 and whose lower end is inserted near the bottom of the inner bag 5 to guide the fire extinguishing liquid 3 into the hose 13. The guide pipe 16 is characterized by having an inlet hole forming region 19 provided with a plurality of inlet holes 17, and a non-porous region 21 above the inlet hole forming region 19 where no holes are provided.

Description

Technical Field

[0001] The present invention relates to a fire supply appliance that stores a fire extinguishing working fluid in a tank and discharges the fire extinguishing working fluid to the outside by pressurizing the inside of the tank with a pressurized gas or the like.

Background Art

[0002] Conventional fire supply appliances include, for example, an inner bag type having an inner bag filled with a fire extinguishing agent or the like inside a tank, such as the "fire extinguishing agent tank" of Patent Document 1. The inner bag type fire supply appliance discharges the fire extinguishing agent to a hose connected to the tank by filling a pressure gas between the inner wall of the tank and the inner bag to pressurize the inner bag, and the fire extinguishing agent is discharged from a nozzle provided at the tip of the hose.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the inner bag type fire supply appliance as described above, when the fire extinguishing working fluid is used up and the contraction of the inner bag stops, the water discharge stops. At this time, the fire extinguishing working fluid that could not be discharged remains inside the hose. Therefore, when replacing the empty tank, if the hose is removed from the tank, the fire extinguishing working fluid remaining inside the hose may flow back and leak from the base end side of the hose, possibly soiling the seal part and the surroundings of the joint part.

[0005] The present invention has been made to solve such problems, and an object thereof is to provide a fire supply appliance in which even when the hose is removed from the tank during tank replacement, it is difficult for the fire extinguishing working fluid to flow back and leak from the base end side of the hose.

Means for Solving the Problems

[0006] (1) The fire extinguishing device according to the present invention comprises a tank for housing an inner bag filled with fire extinguishing liquid, and a discharge passage for discharging the fire extinguishing liquid from the inner bag, wherein the inner bag is compressed by filling the gap between the inner bag and the inner surface of the tank with gas, and the fire extinguishing liquid is discharged from the discharge passage, wherein the discharge passage comprises a hose with a nozzle at its tip, and a guide pipe whose upper end is connected to the base end of the hose and whose lower end is inserted near the bottom of the inner bag to guide the fire extinguishing liquid into the hose, wherein the guide pipe has an inlet-forming region with a plurality of inlet holes, and a non-porous region above the inlet-forming region where no holes are provided.

[0007] (2) Furthermore, in the case described in (1) above, an air reservoir is provided above the liquid surface of the fire extinguishing liquid inside the inner bag, and the non-porous region is located within the air reservoir.

[0008] (3) Furthermore, in the case described in (2) above, the capacity of the air reservoir is characterized to be greater than or equal to the capacity of the hose. [Effects of the Invention]

[0009] In this invention, by providing a non-porous area at the top of the guide pipe, air sealed in the inner bag along with the fire extinguishing liquid flows into the guide pipe during the final stage of water discharge. When air flows from the guide pipe into the hose, the air pushes out any remaining fire extinguishing liquid inside the hose, causing the fire extinguishing liquid to be discharged from the nozzle. This prevents firefighting fluid from remaining at the base end of the hose, making it less likely for firefighting fluid to backflow and leak when the hose is removed from the tank during tank replacement, thus preventing contamination of the joint (seal). [Brief explanation of the drawing]

[0010] [Figure 1] This is an explanatory diagram of a fire extinguishing device according to one embodiment of the present invention. [Figure 2] This diagram (part 1) illustrates the internal state of the tank when the fire extinguishing equipment shown in Figure 1 is in use. [Figure 3] This is a diagram illustrating the state of the fire extinguishing equipment shown in Figure 1 when it is in use (part 2). [Figure 4] This is a diagram illustrating the state of the fire extinguishing equipment in use (part 3) shown in Figure 1. [Figure 5] This is a diagram illustrating the state of the fire extinguishing equipment in use (part 4) shown in Figure 1. [Figure 6] This is a diagram illustrating the state of the fire extinguishing equipment in use (part 5) shown in Figure 1. [Modes for carrying out the invention]

[0011] As shown in Figure 1, a fire extinguishing device 1 according to one embodiment of the present invention has a tank 7 that houses an inner bag 5 filled with fire extinguishing liquid 3, and a discharge passage 9 for discharging the fire extinguishing liquid 3 from the inner bag 5. When using the fire extinguishing device 1, gas is filled into the gap between the inner bag 5 and the inner surface of the tank 7, compressing the inner bag 5 and discharging the fire extinguishing liquid 3 from the discharge passage 9.

[0012] Examples of firefighting liquid 3 to be filled into the inner bag 5 include fire extinguishing agents and light-blocking agents. Light-blocking agents are sprayed onto the surface of solar panels during firefighting operations to block light entering the solar panels and prevent electric shock from water discharge.

[0013] The discharge passage 9 comprises a hose 13 with a nozzle 11 at its tip and a guide pipe 16 for guiding the fire extinguishing liquid 3 into the hose 13. The hose 13 is equipped with valves 14 and 15 that open and close the flow path of the fire extinguishing fluid 3. In Figures 1 to 6, when valves 14 and 15 are shown in black, they are in the closed state, and when they are shown in white, they are in the open state.

[0014] The guide tube 16 has its upper end connected to the base end of the hose 13 and its lower end inserted to near the bottom of the inner bag 5. A plurality of inflow holes 17 are provided in the peripheral wall portion of the guiding pipe 16 for allowing the fire extinguishing working liquid 3 in the inner bag 5 to flow into the guiding pipe 16. Conventionally, it was common for the inflow holes 17 to be formed over the entire length from the upper end to the lower end of the guiding pipe 16 (see FIG. 1 of Patent Document 1). However, the guiding pipe 16 of the present embodiment has a non-hole region 21 where no inflow hole 17 is provided above the inflow hole formation region 19 where the inflow holes 17 are formed.

[0015] An air pocket 23 is formed on the liquid surface of the fire extinguishing working liquid 3 in the inner bag 5. This air pocket 23 is formed by the residual air when the fire extinguishing working liquid 3 is enclosed in the inner bag 5. And as shown in FIG. 1, in the use state, the inflow hole formation region 19 is located in the liquid of the fire extinguishing working liquid 3, and the non-hole region 21 is located in the air pocket 23.

[0016] In the fire extinguishing supply appliance 1 configured as described above, when the hose 13 is removed from the tank 7 after use, the reason why the fire extinguishing working liquid 3 is difficult to leak from the base end side of the hose 13 will be explained. FIGS. 2 to 6 show the state of the fire extinguishing supply appliance 1 during use.

[0017] When using the fire extinguishing supply appliance 1, a pressurized gas such as nitrogen is injected into the gap between the inner bag 5 and the inner surface of the tank 7 by the pressurizing means 24. When the pressurized gas is injected, as shown in FIG. 2, the inner bag 5 is pressurized, and the fire extinguishing working liquid 3 flows into the guiding pipe 16 from the inflow holes 17. On the other hand, since no inflow hole 17 is formed in the non-hole region 21 located in the air pocket 23, the air in the air pocket 23 is compressed without flowing into the guiding pipe 16 and remains in the upper part of the inner bag 5.

[0018] When the valves 14 and 15 are opened to start draining water, as shown in FIG. 3, the fire extinguishing working liquid 3 that has flowed into the guiding pipe 16 flows through the hose 13 and is discharged to the outside from the nozzle 11. At this time, since the fire extinguishing working liquid 3 flows into the guiding pipe 16 in order from the upper inflow holes 17 provided, the inner bag 5 is deformed so as to collapse and constrict from the vicinity of the upper inflow holes 17 (the portion indicated by the arrow in the figure). Thereafter, as shown in FIG. 4, while leaving the compressed air remaining in the upper part of the inner bag 5, the inner bag 5 gradually contracts from above so as to stick to the inflow hole formation region 19 of the induction pipe 16.

[0019] Eventually, as shown in FIG. 5, the inflow holes 17 are sequentially blocked from above by the inner bag 5 attached to the induction pipe 16, and the water discharge pressure decreases. In the conventional example, when almost all of the fire extinguishing working fluid 3 in the inner bag 5 flows into the induction pipe 16 and all of the inflow holes 17 are blocked by the inner bag 5, the flow of the fire extinguishing working fluid 3 stops, and the water discharge stops while leaving the fire extinguishing working fluid 3 remaining in the hose 13.

[0020] In this regard, in the present embodiment, when all of the inflow holes 17 are blocked and the flow of the fire extinguishing working fluid 3 stops, as shown in FIG. 6, due to the pressure of the pressurized gas, the air pocket 23 remaining in the upper part of the inner bag 5 is pushed downward. When the pushed-down air pocket 23 reaches the uppermost inflow hole 17, the air in the air pocket 23 flows into the induction pipe 16 from the inflow hole 17.

[0021] The fire extinguishing working fluid 3 remaining in the hose 13 is pushed out toward the nozzle 11 by the air 25 flowing from the induction pipe 16 into the hose 13, and the fire extinguishing working fluid 3 is discharged. Therefore, the amount of the fire extinguishing working fluid 3 remaining in the hose 13 decreases, and it becomes difficult for the fire extinguishing working fluid 3 to remain on the base end side of the hose 13.

[0022] As described above, in the present embodiment, by providing the non-porous region 21 in the upper part of the induction pipe 16, the air pocket 23 is compressed and held in the upper part of the inner bag 5 until the final stage of the water discharge, and the air 25 flows into the hose 13 at the final stage of the water discharge. Therefore, the fire extinguishing working fluid 3 remaining inside the hose 13 is pushed out from the nozzle 11 by the air 25. This makes it less likely for the fire extinguishing fluid 3 to remain on the base end of the hose 13, and even when the hose 13 is removed from the tank 7 during tank replacement, the fire extinguishing fluid 3 is less likely to leak from the base end of the hose 13. Therefore, contamination of the joint (seal) by the fire extinguishing fluid 3 during tank replacement can be prevented.

[0023] When filling the inner bag 5 with the fire extinguishing liquid 3, it is rare to completely fill the inner bag 5 with the fire extinguishing liquid 3, so the aforementioned air pocket 23 is naturally formed. However, if the amount of air in the air pocket 23 is small, the amount of fire extinguishing liquid 3 that can be pushed out from the hose 13 in the final stage of water discharge will be small. Therefore, it is preferable to adjust the amount of fire extinguishing liquid 3 filled into the inner bag 5 to actively create an air pocket 23.

[0024] In particular, if the capacity of the air reservoir 23 is greater than or equal to the capacity of the hose 13, all of the fire extinguishing liquid 3 remaining in the hose 13 can be discharged at the final stage of water discharge, which is preferable as it prevents the fire extinguishing liquid 3 from leaking out of the hose 13 when the tank is replaced. [Explanation of symbols]

[0025] 1. Firefighting equipment 3. Firefighting liquid 5. Inner bag 7 tanks 9 Exhaust channel 11 nozzles 13 Hose 14 valves 15 valves 16 Guide tube 17 Inflow hole 19 Inflow hole formation area 21 Non-porous areas 23 Air pockets 24 Pressurizing means 25 Air

Claims

1. A method for filling a fire extinguishing device with fire extinguishing liquid, comprising a tank containing an inner bag filled with fire extinguishing liquid, and a discharge channel for discharging the fire extinguishing liquid from the inner bag, wherein the inner bag is compressed by filling the gap between the inner bag and the inner surface of the tank with gas, thereby discharging the fire extinguishing liquid from the discharge channel, The discharge passage comprises a hose with a nozzle at its tip and removable from the tank, and a guide pipe whose upper end is connected to the base end of the hose and whose lower end is inserted near the bottom of the inner bag to guide the fire extinguishing liquid into the hose. The guide tube comprises an inlet-forming region having a plurality of inlet holes, and a non-porous region above the inlet-forming region where no holes are provided. A method for filling a fire extinguishing device with fire extinguishing liquid, characterized in that an air pocket is formed above the liquid surface of the fire extinguishing liquid inside the inner bag, the non-porous region is located in the air pocket, and the fire extinguishing liquid is filled in such a way that the volume of the air pocket is greater than or equal to the volume of the hose.

2. A method for manufacturing a fire extinguishing device comprising a tank containing an inner bag filled with fire extinguishing liquid, and a discharge channel for discharging the fire extinguishing liquid from the inner bag, wherein the inner bag is compressed by filling the gap between the inner bag and the inner surface of the tank with gas, thereby discharging the fire extinguishing liquid from the discharge channel, A hose with a nozzle at its tip is detachably attached to the tank, and a guide pipe for guiding the fire extinguishing liquid is connected to the hose, with its upper end connected to the base end of the hose and its lower end inserted near the bottom of the inner bag to form the discharge passage. The guide tube comprises an inlet-forming region having a plurality of inlet holes, and a non-porous region above the inlet-forming region where no holes are provided. A method for manufacturing a fire extinguishing device, characterized in that an air pocket is formed above the liquid surface of the fire extinguishing liquid inside the inner bag, the non-porous region is located in the air pocket, and the fire extinguishing liquid is filled so that the volume of the air pocket is greater than or equal to the volume of the hose.

Images