JP2020020942A - Fire extinction experience device - Google Patents

Abstract

To provide a fire extinction experience device capable of surely igniting even in reuse.SOLUTION: A fire extinction experience device A includes: a tank 10 for accommodating water W; a gas introduction pipe 30; an ignition gas introduction pipe 40; and an ignition device 50. The gas introduction pipe 30 has a gas discharge pipe 35 at a downstream end and a three-way branch pipe 32 at a middle. The gas discharge pipe 35 is immersed in the water W and releases a combustion gas into the water. The three-way branch pipe 32 is disposed below the water surface. The ignition gas introduction pipe 40 extends upward from the three-way branch pipe 32 and has an ignition port 43 above the water. The ignition device 50 ignites the combustion gas discharged from the ignition port 43 to make it a seed fire. The combustion gas discharged from the gas discharge portion 35 into the water and floated from the water surface is ignited by the seed fire. A check valve 33 provided between the three way branch pipe 32 and the gas discharge pipe 35 permits supply of the combustion gas from the three way branch pipe 32 to the gas discharge pipe 35 to prevent an inflow of the water from the gas discharge pipe 35 into the three way branch pipe 32.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a fire extinguishing experience device used for experiencing fire extinguishing work.

As a device for experiencing a fire extinguishing operation, a fire extinguishing experience device using actual combustion flame has been proposed so that a realistic fire extinguishing operation can be performed.
The fire extinguisher experience device disclosed in Patent Document 1 below includes a tank for storing water, a gas introduction pipe for discharging combustion gas into water in the tank, and a gas introduction pipe for generating a combustion flame. And an ignition device for igniting the combustion gas.

  In the fire extinguisher experience device of Patent Literature 1, an upper part of a tank in which water is stored is opened. The gas introduction pipe is supplied with combustion gas therein, and has a gas discharge portion at a downstream end. The gas discharge section is immersed in the water in the tank and discharges the combustion gas into the water. A branch portion is provided in the middle of the gas introduction pipe. This branch is located below the water surface.

  The ignition gas introduction pipe branched from the branch portion of the gas introduction pipe extends upward, is supplied with combustion gas therein, and has an ignition port at a tip end above the water surface. The ignition device includes a spark plug that ignites the combustion gas discharged from the ignition port by spark discharge, and an igniter that applies a predetermined voltage to the spark plug. The igniter is arranged above the water surface adjacent to the spark plug. By the pilot flame ignited by the spark plug, the combustion gas released into the water in the tank from the gas discharge portion of the gas introduction pipe and floated from the water surface is ignited to be the main flame. A fire extinguishing operation is performed on the combustion flame as the main fire thus generated.

JP 2010-210878 A

  In the above-mentioned conventional fire extinguishing experience device, when the supply of the combustion gas to the gas introduction pipe is stopped, the water in the tank is discharged because the gas discharge part and the branch part of the gas introduction pipe are arranged below the water surface. The gas enters the ignition gas introduction pipe from the discharge part via the branch part. In this state, when the combustion gas is supplied to the gas introduction pipe in order to use the fire extinguishing experience apparatus again, water that has entered the ignition gas introduction pipe may be released from the ignition port and adhere to the ignition plug of the ignition apparatus. Was. As a result, the ignition device does not operate normally, and it is not possible to ignite the pilot flame, which may cause a problem that the combustion flame as the main flame cannot be ignited.

  In the conventional fire extinguishing experience apparatus, the igniter of the ignition device is disposed above the water surface adjacent to the ignition plug. Therefore, the igniter may be overheated due to the radiant heat of the pilot flame and the main flame, causing a problem that the igniter may be damaged.

In order to solve at least one of the above-mentioned problems, a fire extinguishing experience apparatus according to the present invention includes a tank having an open top and containing a non-flammable liquid therein, and a gas for discharging a combustion gas into the liquid in the tank. An introduction pipe, an ignition gas introduction pipe branched from the gas introduction pipe and having an ignition port, and an ignition device for igniting combustion gas are provided.
The gas introduction pipe is supplied with combustion gas therein, is provided with a gas discharge portion at a downstream end, and is provided with a branch portion at an intermediate portion. The gas discharge unit is immersed in the liquid and discharges a combustion gas into the liquid. The branch portion is disposed below the liquid level of the liquid and branches the combustion gas. The ignition gas introduction pipe branches off from a branch portion of the gas introduction pipe, extends upward, is supplied with combustion gas therein, and has an ignition port formed above the liquid. The igniter ignites the combustion gas discharged from the igniter to generate a pilot flame. The combustion gas released from the gas discharge portion into the liquid and floated from the liquid surface is ignited by the pilot flame.
In such a fire extinguishing experience device, a backflow prevention structure is provided between the branch portion and the gas discharge portion of the gas introduction pipe, and the backflow prevention structure supplies the combustion gas from the branch portion to the gas discharge portion. And the inflow of the liquid from the gas discharge section to the branch section is prevented.

  According to the above configuration, since the backflow prevention structure prevents the liquid from flowing from the gas discharge portion to the branch portion in the gas introduction pipe, the liquid in the tank is stopped even when the supply of the combustion gas to the gas introduction pipe is stopped. Does not enter the ignition gas introduction pipe from the gas discharge portion through the branch portion. Therefore, even if the combustion gas is supplied to the gas introduction pipe in order to use the fire extinguisher experience apparatus again, the combustion gas is released from the ignition port without releasing the liquid. Therefore, the pilot flame can be ignited without causing any abnormality in the ignition device, and thus the combustion flame as the main flame can be ignited.

Preferably, the igniter has an ignition plug that performs a spark discharge on the combustion gas discharged from the ignition port, and an igniter that applies a predetermined voltage to the ignition plug, wherein the igniter is provided outside the tank. It is arranged below the liquid level.
According to the above configuration, since the igniter is disposed below the liquid level, the igniter is less affected by the radiant heat of the pilot flame and the main flame. Therefore, damage of the igniter due to overheating can be prevented.

Preferably, a window hole for determining the level of the liquid contained in the tank is formed on a side wall of the tank, the ignition port and the ignition plug are arranged above a lower end of the window hole, and the igniter is Are disposed below the lower end of the window hole.
According to the above configuration, the liquid injected into and contained in the tank is discharged from the window when the liquid level reaches a certain level, and therefore does not rise from the lower end of the window. Therefore, the liquid in the tank does not reach the ignition port and the ignition plug, and the igniter disposed outside the tank can be lower than the liquid level of the liquid in the tank.

Preferably, a through hole extending horizontally from an inner peripheral surface to an outer peripheral surface of the peripheral wall portion is formed in a portion of the peripheral wall portion of the ignition gas introduction pipe above the liquid, and the outer peripheral surface of the through hole is formed. The opening on the side is the ignition port.
According to the above configuration, it is possible to keep the pilot flame away from the structure of the fire extinguishing training apparatus, for example, the side wall of the tank, as compared with the case where the ignition port is oriented horizontally and vertically. Therefore, it is possible to prevent overheating of the device due to the pilot flame.

  According to the present invention, it is possible to provide a fire extinguisher experience device that can reliably ignite even in reuse.

It is a figure showing the whole fire extinguishing experience device composition concerning one embodiment of the present invention. FIG. 2 is an enlarged sectional view taken along the line II-II of FIG. 1. FIG. 3 is an enlarged sectional view taken along a line III-III in FIG. 2. It is sectional drawing which shows a backflow prevention structure, (A) shows a closed state, (B) shows an open state.

Hereinafter, a fire extinguishing experience apparatus according to an embodiment of the present invention will be described with reference to the drawings.
As shown in FIG. 1, the fire extinguisher experience device A includes a device main body 1, a control unit 2, a controller 3, and a gas supply device 4.

  The apparatus main body 1 generates a combustion flame, and has a tank 10 and a device housing section 20. The apparatus main body 1 includes a gas introduction pipe 30 for introducing the combustion gas G into the tank 10, an ignition gas introduction pipe 40 for branching from the gas introduction pipe 30 and discharging the combustion gas G for pilot light, An ignition device 50 is provided in the housing portion 20 and ignites the combustion gas G for pilot flame.

  The tank 10 contains water W as a nonflammable liquid inside, and is formed of a metal plate such as stainless steel having excellent heat and corrosion resistance, and is formed in a rectangular parallelepiped container shape with an open top. The tank 10 may be formed in a container shape such as a square or a circle in plan view. Support plates 11 are provided at both ends of the lower surface of the tank 10 in the longitudinal direction (the left-right direction in FIG. 1). The tank 10 is placed on the ground (not shown) or the like via the support plates 11, 11, and a gap having an interval equal to the height of the support plate 11 is provided between the ground and the lower surface of the tank 10. Is formed. The tank 10 may be placed directly on the ground or the like.

  As shown in FIG. 2, a protruding plate portion 12 is provided at each upper end of the two side walls 10a and 10b extending along the longitudinal direction of the tank 10. The two projecting plate portions 12, 12 are horizontally projected toward the inside of the tank 10 so as to approach each other. Therefore, the width of the open portion at the upper end of the tank 10 is smaller than the width of the tank 10 by the width of the two protruding plate portions 12. Note that the entire upper portion of the tank 10 may be opened upward without forming the protruding plate portions 12.

  As shown in FIGS. 1 and 2, a rectangular window hole 13 is formed at one end (right end in FIG. 1) of one side wall 10a extending along the longitudinal direction of the tank 10 in the longitudinal direction. I have. The window 13 has the following two functions. The first function is to take in outside air into the tank 10. The second function is to determine the maximum water level of the water W stored inside the tank 10. When the water level of the water W reaches the lower end of the window hole 13 when the water is injected into the tank 10, the water W is discharged to the outside from the window hole 13. Thereby, the highest water level of the water W that coincides with the lower end of the window hole 13 in the tank 10 is determined. The window 13 may be disposed at the other end (the left end in FIG. 1) in the longitudinal direction of the side wall 10a, or may be formed in another shape such as a square or a circle. Further, a plurality of window holes 13 may be formed, and may be formed not only on the side wall 10a but also on other side walls.

  As shown in FIG. 1, the gas introduction pipe 30 penetrates a side wall 10 c arranged at one longitudinal end (right end in FIG. 1) of the tank 10 and extends from the outside of the tank 10 to the inside. . The gas introduction pipe 30 is disposed below the lower end of the window 13 of the tank 10, and is immersed in water W in the tank 10. From the upstream side to the downstream side, the gas introduction pipe 30 includes an outer horizontal pipe 31, a three-way branch pipe 32 (branch), a check valve 33 (backflow prevention structure), a joint 34, and a gas discharge pipe 35 (gas discharge part). ), Which are sequentially connected.

  The gas supply pipe 5 is connected to the outer horizontal pipe 31 at the upstream end of the gas introduction pipe 30 via a joint 36. Thereby, the combustion gas G is supplied from the gas supply device 4 to the inside of the gas introduction pipe 30 via the gas supply pipe 5.

  As shown in FIG. 4A, the three-way branch pipe 32 includes an inlet horizontal connection part 32a connected to the outer horizontal pipe 31, an output horizontal connection part 32b connected to the check valve 33, and an upper side. And a vertical connection portion 32c facing the same. As shown in FIG. 1, the three-way branch pipe 32 is disposed in the tank 10, and only the entrance-side horizontal connection part 32a penetrates the side wall 10c and is exposed to the outside.

  The check valve 33 has a backflow prevention structure that allows the flow of the fluid from the upstream side to the downstream side and prevents the flow of the fluid from the downstream side to the upstream side, as shown in FIG. The three-way branch pipe 32 is screwed to the outlet horizontal connection part 32b.

  As shown in FIG. 4A, the check valve 33 has a cylindrical housing 60 having an internal flow path. On the inner peripheral surface of the housing 60, a valve seat portion 60a having a tapered surface whose diameter increases from upstream to downstream is formed. In the housing 60, a valve member 61 which is seated on the valve seat portion 60a or recedes by sliding is disposed. The valve member 61 has a distal end 61a on the upstream side and a flange 61b on the downstream side. The distal end portion 61a has a tapered shape corresponding to the valve seat portion 60a. An O-ring 62 as a seal member is mounted between the distal end portion 61a and the flange portion 61b. When the distal end portion 61a is seated on the valve seat portion 60a, the O-ring 62 comes into close contact with the valve seat portion 60a and the flow path of the housing 60 is shut off. An annular gap is formed between the periphery of the flange 61b and the inner periphery of the housing 60 to allow circulation.

  On the downstream side of the housing 60, a support ring 63 engaged with a groove on the inner peripheral surface is arranged, and the downstream side of the valve member 61 is inserted with a gap. The support ring 63 supports the spring 64, and the upstream end of the spring 64 is in contact with the flange 61b. Thereby, the spring 64 always urges the valve member 61 to the upstream side, and the O-ring 62 attached to the valve member 61 is in a state of contacting the valve seat portion 60a, and the fluid pushes the valve seat portion 60a. It cannot be distributed.

  In the check valve 33 having the above configuration, when the pressure on the upstream side of the valve member 61 becomes higher than that on the downstream side, and the valve member 61 is slid to the downstream side, as shown in FIG. The O-ring 62 separates from the valve seat 60a. The check valve 33 is opened, and the fluid can flow through the valve seat portion 60a from the upstream side to the downstream side. However, when the pressure on the downstream side of the valve member 61 becomes higher than that on the upstream side, as shown in FIG. 4 (A), the distal end portion 61a of the valve member 61 sits on the valve seat portion 60a and the O-ring 62. Keeps contacting the valve seat portion 60a. The check valve 33 is kept closed, and the fluid does not flow through the valve seat portion 60a from the downstream side to the upstream side.

  The gas discharge pipe 35 forms a downstream end of the gas introduction pipe 30, and is connected to the check valve 33 via a joint 34. The gas discharge pipe 35 is arranged horizontally with its longitudinal direction facing the same direction as the longitudinal direction of the tank 10. Although the gas discharge tube 35 is formed in a straight line, it may be formed in a substantially U-shape, and may be folded back to one end at the other end (the left end in FIG. 1) of the tank 10, or other It may be shaped. The distal end of the gas discharge tube 35 is supported on the bottom of the tank 10 via the bracket 14.

  The gas discharge tube 35 has a large number of through holes (not shown) penetrating the peripheral wall portion in the radial direction. Therefore, when the combustion gas G is supplied to the gas introduction pipe 30, the combustion gas G is released into water from each through hole of the gas discharge pipe 35. In addition, the through-hole is arranged at the lower part of the gas discharge pipe 35, but may be arranged at the middle part or the upper part in the vertical direction.

  The ignition gas introduction pipe 40 is connected to the vertical connection part 32c of the three-way branch pipe 32. As shown in FIGS. 2 and 3, the ignition gas introduction pipe 40 extends vertically upward and is closed at the top. As shown in FIG. 3, the ignition gas introduction pipe 40 has a horizontal portion from the inner peripheral surface 41i to the outer peripheral surface 41o at the upper end of the peripheral wall 41 and above the lower end of the window hole 13 of the tank 10. Is formed. The through hole 42 extends in the longitudinal direction of the tank 10, and an opening on the outer peripheral surface 41 o side of the peripheral wall portion 41 is an ignition port 43. The ignition port 43 faces the side wall 10d arranged at the other end in the longitudinal direction of the tank 10 (the left end in FIG. 1). When the combustion gas G branched from the three-way branch pipe 32 of the gas introduction pipe 30 is supplied into the ignition gas introduction pipe 40, the combustion gas G is discharged from the ignition port 43 in the horizontal direction.

  The device housing section 20 will be described. As shown in FIG. 1, a cover 70 opened downward is supported on a side wall 10c on one end side (right side in FIG. 1) of the tank 10 in the longitudinal direction. The cover 70 covers the ignition gas introduction pipe 40 inside the tank 10 and the outside of the tank 10 via the side wall 10c in the longitudinal direction of the apparatus body 1, and the portion covered by the cover 70 accommodates the equipment. The section 20.

The device accommodating section 20 is provided with an ignition device 50 that ignites the combustion gas G discharged from the ignition port 43 to generate a pilot flame. The ignition device 50 has a spark plug 51 and an igniter 55.
The spark plug 51 penetrates the side wall 10c of the tank 10, and is supported by the side wall 10c by fastening nuts 51a, 51a screwed to both sides of the spark plug 51 with the side wall 10c therebetween. I have. As shown in FIGS. 2 and 3, the pair of electrodes 52, 52 of the spark plug 51 extend in the longitudinal direction of the tank 10 at a position right beside the ignition port 43, and as shown in FIG. 52a project horizontally toward the ignition port 43 side so as to approach each other. As shown in FIG. 1, a predetermined voltage is applied to the ignition plug 51 from an igniter 55 via a wiring 53.

  The igniter 55 is accommodated in an igniter accommodating box 71 formed in a rectangular parallelepiped box shape by a metal plate such as stainless steel, and is fixed to a ceiling surface thereof. The igniter storage box 71 has one side fixed and supported on the side wall 10 c of the tank 10, and is disposed between the bottom of the tank 10 and the lower end of the window 13. Thus, the igniter 55 is located below the surface of the water W in the tank 10. As a measure against heat, the igniter storage box 71 may be provided with a heat insulating material, or the igniter storage box 71 may be formed of a heat insulating material.

  The igniter 55 is connected to the control unit 2 via the power supply wiring 6 and the control cable 7, and the ignition plug 51 is connected to the control unit 2 via the igniter 55.

  The control unit 2 is also connected via a gas supply pipe 8 to a gas supply device 4 holding a combustion gas G such as propane gas. Further, the control unit 2 is connected to the controller 3 by wireless or wire. The control unit 2 receives command signals from various buttons of the controller 3 and controls the ignition device 50 and controls the supply of the combustion gas G by the gas supply device 4.

  When an ignition operation such as pressing an ignition button (not shown) of the controller 3 is performed, a voltage is applied to the igniter 55 by the control unit 2, and a high voltage is applied to the ignition plug 51. Thus, the spark plug 51 intermittently generates a spark discharge between the tips 52a, 52a of the pair of electrodes 52, 52. The intermittent spark discharge is performed for a predetermined time (for example, 10 seconds), but may be performed while the ignition button of the controller 3 is kept pressed.

  Further, by the ignition operation of the controller 3, the control unit 2 supplies the combustion gas G of the gas supply device 4 to the gas introduction pipe 30 via the gas supply pipe 5 as the combustion gas for pilot flame. The combustion gas G passes through the outer horizontal pipe 31, passes through the three-way branch pipe 32, passes through the ignition gas introduction pipe 40, is supplied to the ignition port 43 located above the combustion gas G, and is discharged horizontally therefrom. The released combustion gas G is ignited by the spark discharge of the ignition plug 51 and continues to burn as a pilot flame.

  A part of the pilot gas G is supplied from the three-way branch pipe 32 to the check valve 33. The pressure of the combustion gas G causes the valve member 61 of the check valve 33 on which the water pressure from the gas discharge pipe 35 side and the urging force of the spring 64 act to retreat from the valve seat portion 60a and open the check valve 33. Slightly higher than the pressure to plug. Therefore, the valve member 61 is slightly slid to the downstream side from the position shown in FIG. 4A, the check valve 33 is opened, and the combustion gas G slightly flows to the gas discharge pipe 35 side. The combustion gas G is released into the water from each through hole of the gas discharge pipe 35, floats in the water, and accumulates on the water surface. The combustion gas G on the water surface is ignited by the pilot flame of the ignition port 43, and becomes a combustion flame (low flame) having a lower thermal power than the main fire for fire extinguishing experience.

  When a combustion operation such as pressing a combustion button (not shown) of the controller 3 is performed after the pilot flame and the low heat are burned, the control unit 2 converts the combustion gas G of the gas supply device 4 into a large amount for the main flame. The gas is supplied to the gas introduction pipe 30 through the gas supply pipe 5 as combustion gas. A part of the combustion gas G is supplied from the three-way branch pipe 32 to the ignition gas introduction pipe 40 and released from the ignition port 43, and continues to burn as a pilot flame.

  The combustion gas G for the ignition supplied from the three-way branch pipe 32 to the check valve 33 is sufficient to open the check valve 33 on which the water pressure and the urging force of the spring 64 act from the gas discharge pipe 35 side. Has pressure. Therefore, as shown in FIG. 4 (B), the valve member 61 of the check valve 33 is largely slid to the downstream side, the check valve 33 is opened, and most of the combustion gas G for the ignition is released. Then, the gas flows into the gas discharge pipe 35 downstream of the check valve 33, and is discharged in large quantities into water from each through hole of the gas discharge pipe 35 as shown in FIG. As a result, the combustion flame (low heat) on the water surface is increased in heat power, and becomes the main fire for fire extinguishing experience. During the combustion of the main flame, air flows into the tank 10 through the window hole 13, so that the main flame continues to burn smoothly without falling short of oxygen.

  When a stop operation such as pressing a stop button (not shown) of the controller 3 is performed after the ignition of the main fire, the control unit 2 stops the supply of the combustion gas G to the gas introduction pipe 30. Thereby, the supply of the combustion gas G to the ignition port 43 and the gas discharge pipe 35 is stopped, the check valve 33 is closed, and the main flame and the pilot flame are extinguished. Note that the combustion gas G for the main fire may be continuously supplied from the gas supply device 4 only while the combustion button (not shown) of the controller 3 is kept pressed.

  As a modified example of the ignition operation and the combustion operation, the check valve 33 on which the water pressure and the urging force of the spring 64 act from the downstream side is not opened at the pressure of the pilot gas G supplied by the ignition operation. It may be. In this case, only the pilot flame ignites in the ignition operation. By the combustion operation following the ignition operation, the combustion gas G for the main fire opens the check valve 33. The combustion gas G for the main fire rises to the surface of the water from the gas discharge pipe 35 via the water, is ignited by a pilot flame, and becomes a combustion flame as a main fire for a fire extinguishing experience.

A case where a fire extinguishing experience is performed using the fire extinguishing experience device A having the above configuration will be described.
First, water W is poured into the tank 10 to the lower end of the window hole 13. Since the water level in the tank 10 does not exceed the lower end of the window hole 13, the ignition port 43 and the ignition plug 51 above this lower end will not be immersed in water.

  Next, the ignition button of the controller 3 is pressed to ignite a pilot flame in the ignition port 43. After the pilot flame is ignited, the combustion button of the controller 3 is pressed to release the combustion gas G from the gas discharge pipe 35 into the water W in the tank 10. After rising to the surface of the water, the combustion gas G released into the water is ignited by a pilot flame and burns as a main flame. Fire extinguisher performs fire extinguishing work to extinguish the main fire with a fire extinguisher.

In such a combustion state of the combustion gas G, the ignition port 43 where the pilot flame is ignited faces the side wall 10d of the other end (left end in FIG. 1) of the tank 10 in the horizontal direction and in the longitudinal direction. The pilot flame is kept away from the side wall 10c and the cover 70. Thereby, overheating of the apparatus main body 1 due to the pilot flame can be prevented. In addition, the igniter 55 located below the surface of the water W in the tank 10 with respect to the pilot flame and the main flame reduces the influence of radiant heat by being disposed below the presence of the water W and the combustion flame. It is hard to receive. Therefore, damage of the igniter 55 due to overheating is prevented.
In the above fire extinguishing work, since the ignition port 43, the ignition plug 51 and the igniter 55 are covered with the cover 70, they do not receive the fire extinguisher of the fire extinguisher.

  After the experience of the fire extinguishing work, the stop button of the controller 3 is pressed to stop the supply of the combustion gas G from the gas supply device 4 to the gas introduction pipe 30. Thereby, the main flame and the pilot flame are extinguished. When the supply of the combustion gas G from the gas supply device 4 to the gas introduction pipe 30 is stopped, the water W in the tank 10 enters the gas discharge pipe 35 through the through hole, and as shown in FIG. Then, the user tries to go to the upstream side of the gas introduction pipe 30 through the joint 34. However, the check valve 33 prevents the water W from flowing into the three-way branch pipe 32 on the upstream side. Therefore, the water W in the tank 10 does not enter the ignition gas introduction pipe 40 branched from the three-way branch pipe 32.

  When the ignition button is pressed to experience the fire extinguishing again, water W is not released from the ignition port 43 of the ignition gas introduction pipe 40, and the pilot flame can be immediately ignited. Therefore, when the fire-extinguishing experience device A is reused, water that has entered the ignition gas introduction pipe as in the conventional fire-extinguishing experience device is released from the ignition port and adheres to the electrode of the ignition plug, causing the ignition of the pilot flame. It is possible to avoid inconveniences such as preventing ignition and preventing the igniter from being damaged due to overheating at the time of previous use.

Note that the present invention is not limited to the above-described embodiment, and various modifications can be adopted without departing from the gist thereof.
The backflow prevention structure only needs to have a configuration for preventing the water in the tank from flowing into the three-way branch pipe (branch portion), and is not limited to the check valve.
In the above-described embodiment, the three-way branch pipe is arranged in the tank. However, the three-way branch pipe may be arranged outside the tank. In this case, the ignition port of the ignition gas introduction pipe connected to the three-way branch pipe is located inside the tank. What is necessary is just to comprise so that it may be arrange | positioned.

  INDUSTRIAL APPLICABILITY The present invention can be applied to a fire extinguishing experience device used for experiencing fire extinguishing work.

A Fire extinguishing experience device G Combustion gas W Water (nonflammable liquid)
DESCRIPTION OF SYMBOLS 1 Apparatus main body 2 Control unit 3 Controller 4 Gas supply device 10 Tank 10a Tank side wall 13 Window hole 20 Equipment accommodation part 30 Gas introduction pipe 32 Three-way branch pipe (branch part)
33 Check valve (backflow prevention structure)
35 Gas discharge part 40 Ignition gas introducing pipe 41 Peripheral wall of ignition gas introducing pipe 41i Inner peripheral surface of peripheral wall 41o Outer peripheral surface of peripheral wall 42 Through hole 43 Ignition port 50 Ignition device 51 Ignition plug 55 Igniter 70 Cover

Claims (4)

A tank that is open at the top and contains a nonflammable liquid inside,
A combustion gas is supplied to the inside, and a gas discharge portion that is immersed in the liquid and discharges the combustion gas into the liquid is provided at an end on the downstream side, and is disposed below the liquid level of the liquid in the middle. A gas introduction pipe provided with a branch portion for branching the combustion gas
A combustion gas is supplied to the inside by branching from a branch portion of the gas introduction pipe and extending upward, and an ignition gas introduction pipe having an ignition port formed above the liquid;
An ignition device that ignites the combustion gas discharged from the ignition port to make a pilot flame,
In the fire extinguishing experience device, in which the combustion gas released from the gas discharge unit into the liquid and floated from the liquid surface is ignited by the pilot flame,
A backflow prevention structure is provided between the branch part and the gas discharge part in the gas introduction pipe,
The fire extinguishing experience device is characterized in that the backflow prevention structure allows the supply of combustion gas from the branch portion to the gas discharge portion and prevents the flow of the liquid from the gas discharge portion to the branch portion. The ignition device has an ignition plug that performs spark discharge on the combustion gas discharged from the ignition port, and an igniter that applies a predetermined voltage to the ignition plug,
The fire extinguishing experience device according to claim 1, wherein the igniter is disposed outside the tank and below the liquid level. On the side wall of the tank, a window for determining the level of the liquid stored in the tank is formed,
The fire extinguishing experience device according to claim 2, wherein the ignition port and the ignition plug are arranged above a lower end of the window hole, and the igniter is arranged below a lower end of the window hole. . A through hole extending horizontally from the inner peripheral surface to the outer peripheral surface of the peripheral wall portion is formed in a portion of the peripheral wall portion of the ignition gas introduction pipe above the liquid, and an opening of the through hole on the outer peripheral surface side is formed. The fire extinguishing experience device according to any one of claims 1 to 3, wherein a part is the ignition port.

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