JP2009082309A - Liquefied carbon dioxide deriving device and fire extinguishing device - Google Patents

Abstract

Disclosed is a liquefied carbon dioxide gas deriving device that contributes to further increasing the maximum injection pressure of a fire extinguishing agent injected from a fire extinguishing agent storage container and further shortening the time to reach the maximum injection pressure, and the liquefaction thereof. To provide a fire extinguisher equipped with a carbon dioxide gas outlet.
A carbon dioxide gas storage container 11 for storing carbon dioxide gas 12 at the upper part and a carbon dioxide gas storage container 11 for storing liquefied carbon dioxide gas 13 at the lower part, and a bottom part of the carbon dioxide gas storage container 11, respectively. A liquefied carbon dioxide gas derivation device 10, a liquefied carbon dioxide gas derivation device 10, a fire extinguishing agent storage container 20 containing a fire extinguishing agent 22, and a fire extinguishing agent storage container The fire extinguishing apparatus 1 is provided with an injection nozzle 25 provided at 20 through a transfer path 26 for transferring the fire extinguishing agent 22.
[Selection] Figure 1

Description

  The present invention relates to a liquefied carbon dioxide gas deriving device and a fire extinguishing device. More specifically, the maximum injection pressure of a fire extinguishing agent injected from a fire extinguishing agent storage container is further increased, and the time to reach the maximum injection pressure is further shortened. The present invention relates to a liquefied carbon dioxide gas deriving device that contributes to the performance, and a fire extinguishing apparatus including the liquefied carbon dioxide gas deriving device.

  A conventional fire extinguishing apparatus, for example, if each room in a building is a protection section, an injection nozzle for injecting a fire extinguishing agent and a fire extinguishing agent connected to the injection nozzle disposed in each protection section. A fire-extinguishing agent storage container for storing a fire extinguishing agent, and a container valve attached to the fire extinguishing agent storage container (for example, a discharge part thereof), which are coupled to a transfer line for transferring the fire extinguisher, a transfer line extending from each protection section And a drive device for opening the container valve.

  In this fire extinguisher, the drive device is driven to open the container valve so that the fire extinguisher in the fire extinguisher storage container is transferred to the spray nozzle in the protective compartment through the transfer line and sprayed from the spray nozzle. This allows the fire in the protected area to be extinguished. In such a fire extinguishing apparatus, when the extinguishing agent is sent from the extinguishing agent storage container to the transfer line, the volume of the extinguishing agent in the extinguishing agent storage container is gradually reduced, and as a result, is ejected from the nozzle. The momentum of the extinguishing agent gradually decreases (the extinguishing agent injection pressure gradually decreases).

  Therefore, as a fire extinguisher improved such a fire extinguisher, for example, a fire extinguisher storage container is a pressurized gas storage container in which a pressurized gas such as an inert gas (for example, nitrogen, argon, etc.) or carbon dioxide gas is sealed. A fire extinguisher prepared separately and used as a fire extinguishing agent injection pressure source by transferring the pressurized gas to a fire extinguisher storage container, or using the pressurized gas as a fire extinguishing agent injection pressure source and a second fire extinguishing agent Fire extinguishing devices are known.

  An example of a fire extinguisher that uses the pressurized gas as an injection pressure source of the extinguishing agent is a fire extinguisher A shown in FIG. The fire extinguishing apparatus A includes a carbon dioxide gas storage container 11A that contains carbon dioxide gas 12A and liquefied carbon dioxide gas 13A, and a lead-out path 15A that leads or transfers the carbon dioxide gas 12A from the carbon dioxide gas storage container 11A to the fire extinguisher storage container 20A. I have.

  Further, as a fire extinguisher that uses the pressurized gas as a fire extinguishing agent injection pressure source and a second fire extinguishing agent, for example, Patent Document 1 discloses that “liquefied carbon dioxide and aqueous fire extinguishing agent are jetted and atomized. The fire extinguishing method characterized by radiating is described (refer to claim 1). In FIG. 1, "a simple example of the basic configuration of a pressurized radiation system" is described in the column 0010 as an explanation thereof. "1 is a liquefied carbon dioxide container with siphon, 2 is a water-based fire extinguisher container with siphon. 3 is a bypass from the carbon dioxide path, and is used to pressurize the water-based fire extinguisher container 2. From the pressurized container 2, a water-based fire extinguisher is radiated from the nozzle 5 through a siphon, and liquefied carbon dioxide is radiated from the nozzle 4, and is injected as a mixed fire extinguisher which has been atomized by colliding in the immediate vicinity of the nozzle opening. " To have.

  By the way, regardless of whether a fire occurs in a general household or in a factory, if it can be extinguished in a very short time after it has ignited, it can prevent the spread of fire and minimize damage caused by the fire. . From such a point of view, it is extremely important to extinguish as soon as possible at the beginning of a fire, that is, as early as possible.

Japanese Patent Laid-Open No. 7-24080

  The present invention provides a liquefied carbon dioxide deriving device that contributes to further increasing the maximum injection pressure of the extinguishing agent injected from the extinguishing agent storage container and further shortening the time to reach the maximum injection pressure. With the goal.

  Moreover, this invention provides the fire extinguishing apparatus which can make the maximum injection pressure of the fire extinguisher injected from a fire extinguishing agent storage container still higher, and can further shorten the time to reach the maximum injection pressure. Objective.

As means for solving the problems,
The first aspect of the present invention is connected to a carbon dioxide storage container for storing carbon dioxide gas in the upper part and liquefied carbon dioxide gas in the lower part, and a bottom part of the carbon dioxide storage container, and the liquefied carbon dioxide gas is led out from the carbon dioxide storage container. A liquefied carbon dioxide gas derivation device characterized by comprising a derivation path;
The second aspect of the present invention is connected to a carbon dioxide storage container for storing carbon dioxide gas at the top and a liquefied carbon dioxide gas at the bottom, a fire extinguishing agent storage container for storing a fire extinguishing agent, and a bottom of the carbon dioxide storage container, A lead-out path for deriving the liquefied carbon dioxide gas from a gas storage container to the extinguishing agent storage container, and an injection nozzle provided to the extinguishing agent storage container via a transfer path for transferring the extinguishing agent. This is a fire extinguisher characterized by that.

  Since the liquefied carbon dioxide deriving device according to the present invention includes a deriving path for deriving the liquefied carbon dioxide gas from the carbon dioxide storage container, when this deriving path is connected to, for example, a fire extinguishing agent storage container in the fire extinguishing apparatus, The liquefied carbon dioxide gas can be led out into the fire extinguisher storage container in a liquefied state. That is, the liquefied carbon dioxide deriving device according to the present invention leads the liquefied carbon dioxide in a liquefied state having a small volume to the fire extinguisher storage container in a short time via the lead-out path, and the liquefied carbon dioxide gas is supplied to the fire extinguisher storage container. It can be expanded into carbon dioxide gas having a very large volume. As a result, according to the liquefied carbon dioxide deriving device according to the present invention, the internal pressure of the fire extinguisher storage container to which the deriving path is connected can be increased extremely quickly and rapidly. Therefore, according to this invention, the liquefied carbon dioxide deriving device that contributes to further increasing the maximum injection pressure of the extinguishing agent injected from the extinguishing agent storage container and further shortening the time to reach the maximum injection pressure. Can be provided.

  Moreover, since the fire extinguishing apparatus according to the present invention includes the liquefied carbon dioxide gas deriving apparatus according to the present invention, the internal pressure of the fire extinguishing agent storage container can be increased extremely rapidly in a short time. Therefore, according to the present invention, it is possible to provide a fire extinguishing apparatus capable of further increasing the maximum injection pressure of the extinguishing agent injected from the extinguishing agent storage container and further shortening the time to reach the maximum injection pressure. Can do.

  A liquefied carbon dioxide deriving device 10 (hereinafter referred to as a liquefied carbon dioxide deriving device 10 according to the present invention) as an embodiment of the liquefied carbon dioxide deriving device according to the present invention is an embodiment of a fire extinguishing apparatus according to the present invention. Together with the fire extinguishing apparatus 1 (hereinafter referred to as the fire extinguishing apparatus 1 according to the present invention). In addition, in FIG. 1, the carbon dioxide storage container 11 and the fire extinguisher storage container 20 show the internal structure.

  As shown in FIG. 1, the fire extinguisher 1 according to the present invention includes a carbon dioxide storage container 11 that stores carbon dioxide gas 12 in an upper portion and a liquefied carbon dioxide gas 13 in a lower portion, and a fire extinguisher storage that stores a fire extinguisher 22. Connected to the container 20, the bottom of the carbon dioxide storage container 11, a lead-out path 15 for leading the liquefied carbon dioxide gas 13 from the carbon dioxide storage container 11 to the fire extinguisher storage container 20, and the fire extinguisher storage container 20 The injection nozzle 25 is provided through a transfer path 26 for transferring the fire extinguishing agent 22.

  That is, the fire extinguisher 1 is connected to a carbon dioxide storage container 11 for storing carbon dioxide gas 12 in the upper part and a liquefied carbon dioxide gas 13 in the lower part, and a bottom part of the carbon dioxide storage container 11. A liquefied carbon dioxide gas deriving device 10 is provided, which includes a derivation path 15 for deriving the liquefied carbon dioxide gas 13 from the liquefied carbon dioxide gas 13.

  As shown in FIG. 1, the carbon dioxide storage container 11 in the liquefied carbon dioxide deriving device 10 according to the present invention contains carbon dioxide 12 in the upper portion thereof, and in other words, in the lower portion than the carbon dioxide gas 12. The shape is not particularly limited as long as the liquefied carbon dioxide gas 13 can be accommodated below, and examples thereof include a pressure vessel such as a cylinder and a tank. The carbon dioxide storage container 11 has a discharge part 14 at the bottom. A container valve or the like (not shown) is attached to the discharge portion 14 and a later-described outlet path 15 is connected through the container valve or the like. In the fire extinguisher 1, the carbon dioxide storage container 11 is disposed at a position higher than the fire extinguisher storage container 20 described later.

  Carbon dioxide gas (also referred to as carbon dioxide) accommodated in the carbon dioxide storage container 11 is in a mixed state of the liquefied carbon dioxide gas 13 in the pressurized liquefied state and the carbon dioxide gas 12 in the gaseous state. In general, the liquefied carbon dioxide gas 13 is positioned below the carbon dioxide gas 12 due to their specific gravity. The ratio of the liquefied carbon dioxide gas 13 and the carbon dioxide gas 12 accommodated in the carbon dioxide gas storage container 11 is not particularly limited. For example, the internal pressure of the carbon dioxide gas storage container 11 by the carbon dioxide gas 12 is a fire extinguisher storage container 20 described later. The ratio should be larger than the internal pressure. When the ratio between the liquefied carbon dioxide gas 13 and the carbon dioxide gas 12 is accommodated in such a ratio, a transfer means for forcibly transferring the liquefied carbon dioxide gas 13 to the outlet path 15 described later, such as a pump, is not interposed. Alternatively, the liquefied carbon dioxide gas 13 can be led out to the fire extinguisher storage container 20 with the pressure of the carbon dioxide gas 12.

  The carbon dioxide storage container 11 is adjusted to a temperature and pressure at which the liquefied carbon dioxide 13 and the carbon dioxide 12 coexist. Further, the carbon dioxide gas storage container 11 has a volume capable of accommodating a sufficient amount of the liquefied carbon dioxide gas 13 for injecting the fire extinguisher 22 stored in the fire extinguisher storage container 20, in other words, sufficient in the fire extinguishing site. It only needs to have a volume that can secure the injection amount of the extinguishing agent 22, and is appropriately adjusted according to the volume of the extinguishing agent storage container 20 and the injection amount of the extinguishing agent 22.

  As shown in FIG. 1, the lead-out path 15 is connected to the bottom of the carbon dioxide storage container 11 and guides the liquefied carbon dioxide 13 from the carbon dioxide storage container 11. The lead-out path 15 is a copper tube having resistance and pressure resistance to the liquefied carbon dioxide gas 13 and the carbon dioxide gas 12 because the liquefied carbon dioxide gas 13 circulates therethrough. The lead-out pipe 15 may be a pipe formed of a fluorine resin such as polytetrafluoroethylene (also referred to as Teflon (registered trademark)), a metal such as stainless steel, or the like.

  One end of the lead-out path 15 is connected to a discharge portion 14 formed at the bottom of the carbon dioxide storage container 11 or a container valve (not shown) attached to the discharge portion 14, and the other end. Is connected to the vicinity of the upper part of the extinguishing agent storage container 20, that is, the position higher than the liquid level of the extinguishing agent 22 (the space 23 in FIG. 1). In this way, when one end of the lead-out path 15 is connected to the bottom of the carbon dioxide storage container 11 or the like, the liquefied carbon dioxide from the carbon dioxide storage container 11 to the fire extinguishing agent storage container 20 is caused by the pressure of the carbon dioxide gas 12. 13 can be derived in a liquefied state. If the other end of the lead-out path 15 is connected to the vicinity of the upper portion of the extinguishing agent storage container 20, when the liquefied carbon dioxide gas 13 is led out to the extinguishing agent storage container 20, the liquefied carbon dioxide gas 13 is stored in the extinguishing agent storage. Carbon dioxide gas that expands in the vicinity of the upper part of the container 20 presses the extinguishing agent rapidly and with a large pressure in a very short time, and sends out the extinguishing agent 22 to the transfer path 26 with a higher injection pressure in a shorter time. Can do.

  As shown in FIG. 1, the fire extinguisher storage container 20 is not particularly limited as long as the fire extinguisher storage container 20 can be accommodated, and examples thereof include a pressure vessel such as a cylinder and a tank. The extinguishing agent storage container 20 is configured to inject the extinguishing agent 22 from the injection nozzle 25 with the applied pressure resulting from the volume change caused by the vaporization of the liquefied carbon dioxide gas 13 led to the vicinity of the upper part. More specifically, a discharge pipe (also referred to as a siphon pipe) 24 extending to the bottom of the extinguishing agent storage container 20 is specifically provided therein. The extinguishing agent storage container 20 is connected to a transfer path 26 described later via a discharge part 28 at the top.

  Although the fire extinguisher 22 accommodated in the fire extinguisher storage container 20 is not particularly limited, a water-based fire extinguisher is preferable. The water-based fire extinguisher is not particularly limited as long as it has a fire extinguishing action and is a liquid containing water as a main component. For example, potassium carbonate, a surfactant, a polysaccharide and / or a phosphate are added to water. Examples thereof include reinforcing liquid, tap water, and pure water. An example of the water-based fire extinguishing agent is “Megafoam F-610AT” (trade name, manufactured by Dainippon Ink & Chemicals, Inc.) containing a fluorine-based surfactant.

  The fire extinguishing agent 22 is normally stored in the fire extinguishing agent storage container 20 under normal pressure, and may be stored in the fire extinguishing agent storage container 20 under pressure as necessary. The extinguishing agent 22 may be filled in the extinguishing agent storage container 20, but as shown in FIG. 1, a space 23 in which liquefied carbon dioxide gas is led out from the outlet path 15 to the upper part of the extinguishing agent storage container 20. It is preferable that an amount smaller than the capacity of the fire extinguishing agent storage container 20 is accommodated so that the above is defined. When the extinguishing agent 22 in an amount smaller than the capacity of the extinguishing agent storage container 20 is accommodated in the extinguishing agent storage container 20, the liquefied carbon dioxide gas 13 can be led out into the defined space 23 in a liquefied state. The fire extinguishing agent 22 can be injected at a higher injection pressure in a shorter time.

  The fire extinguishing agent storage container 20 only needs to have a volume capable of accommodating a sufficient amount of the fire extinguishing agent 22 at the fire extinguishing site. For example, the number of the fire extinguishing agent storage containers 20 and the fire extinguishing apparatus 1 are installed. It is adjusted as appropriate according to the volume of the compartment (fire extinguishing site).

  As shown in FIG. 1, the injection nozzle 25 is provided in the fire extinguisher storage container 20 via a transfer path 26 for transferring the fire extinguishing agent 22. The injection nozzle 25 only needs to be able to inject the fire extinguishing agent 22, and includes an injection nozzle having one or a plurality of injection holes, a deflector, and an injection nozzle that injects the fire extinguishing agent in the form of foam. As the injection nozzle 25, an appropriate injection nozzle is selected according to the type of the fire extinguishing agent 22, the protection section (fire extinguishing site) where the fire extinguishing apparatus 1 is installed, and the like.

  The transfer path 26 transfers the extinguishing agent 22 accommodated in the extinguishing agent storage container 20 to the injection nozzle 25. As shown in FIG. 1, the transfer path 26 has one end connected to the injection nozzle 25 and the other end connected to the discharge part 28 of the extinguishing agent storage container 20 or the siphon that is connected to the discharge part 28. Connected to the tube 24. Since the fire extinguishing agent 22 pressurized by the vaporization of the liquefied carbon dioxide gas 13 circulates inside the transfer path 26, the transfer pipe 26 is a carbon steel pipe for pressure piping having resistance to the extinguishing agent 22 and pressure resistance. The transfer path 26 may be, for example, a tube formed of a fluorine-based resin such as polytetrafluoroethylene (also referred to as Teflon (registered trademark)) or a metal such as stainless steel.

  In the fire extinguisher 1, the carbon dioxide storage container 11 and the fire extinguisher storage container 20 are connected or connected by a lead-out path 15, and the liquefied carbon dioxide gas 13 led out from the carbon dioxide storage container 11 is used to store the fire extinguisher storage container 20. According to the fire extinguishing site, the capacity of the carbon dioxide gas storage container 11, the storage amount of the carbon dioxide gas 12, in advance, so that a sufficient amount of the extinguishing agent 22 can be released at the fire extinguishing site by pressurizing the pressure. The storage amount of the liquefied carbon dioxide gas 13, the capacity of the extinguishing agent storage container 20, the storage amount of the extinguishing agent 22, the lead-out path 15, the transfer path 26, and the like can be designed.

  The fire extinguisher 1 may be configured, for example, to manually open and close a container valve (not shown) attached to the discharge unit 14 and to inject the fire extinguishing agent 22 after finding a fire. Further, the fire extinguishing apparatus 1 is configured such that a container valve (not shown) attached to the discharge unit 14 is controlled by a control means such as a sequencer or a computer to automatically open and close the container valve, thereby extinguishing the fire extinguishing agent. 22 may be configured to be jetted. The control means includes, for example, an input unit for inputting an alarm signal output from various alarm devices such as a fire alarm, a smoke detector, a temperature sensor, a gas sensor, and the like, and after opening the alarm signal, the container valve is opened and closed. Examples include a computer having an output unit that controls the operation and the opening / closing amount, and an operation unit that operates the container valve by an output from the output unit of the computer and adjusts the opening / closing amount.

  The operation and effect of the fire extinguishing apparatus 1 will be described. First, the fire extinguisher 1 shown in FIG. 1 is assembled. For example, the fire extinguisher 1 prepares, for example, a commercially available liquefied carbon dioxide cylinder as the carbon dioxide storage container 11 and a fire extinguisher storage container 20 in which a fire extinguishing agent 22 is housed in a pressure vessel. As shown in FIG. The gas storage container 11 and the extinguishing agent storage container 20 are connected to the outlet path 15, and the end of the transfer path 26 connected to the injection nozzle 25 is connected to the siphon tube 24 of the extinguishing agent storage container 20 for assembly. be able to.

  When a fire occurs in the protective compartment where the injection nozzle 25 is disposed, the container valve attached to the discharge unit 14 is opened automatically or manually. Then, the liquefied carbon dioxide gas 13 stored in the lower part of the carbon dioxide gas storage container 11 is pushed out from the carbon dioxide gas storage container 11 to the lead-out path 15 by the pressure of the carbon dioxide gas 12 and flows through the lead-out path 15. Then, it is led out to the upper part (space 23) of the extinguishing agent storage container 20. At this time, the liquefied carbon dioxide gas 13 flowing through the outlet passage 15 has a small volume because it is in a liquefied state, and the liquefied carbon dioxide gas 13 is led out to the extinguishing agent storage container 20 simultaneously with the opening of the container valve.

  The liquefied carbon dioxide gas 13 led out to the upper part (space 23) of the extinguishing agent storage container 20 is vaporized in the space 23 of the extinguishing agent storage container 20 from a liquefied state having a small volume to a carbon dioxide gas having a very large volume. As a result, the carbon dioxide gas fills the space 23 at once, but cannot completely expand in the space 23 with a small volume, and the pressure in the space 23 is rapidly increased in a very short time, and a sudden and large pressure is applied to the fire extinguishing agent 22. Add. In this way, the pressure in the extinguishing agent storage container 20 can be greatly increased in a very short time after opening the container valve. Then, the fire extinguishing agent 22 circulates at once in the siphon tube 24 against gravity. The fire extinguishing agent 22 is jetted from the jet nozzle 25 via the siphon tube 24, the discharge portion 28, and the transfer path 26.

  In this way, the fire extinguisher 1 causes the liquefied carbon dioxide gas 13 in a liquefied state having a small volume to be led out to the fire extinguisher storage container 20 in a short time via the lead-out path 15, and the liquefied carbon dioxide gas 13 is supplied to the fire extinguisher storage container. The carbon dioxide gas having an extremely large volume within 20 can be expanded in a short time, and the internal pressure of the extinguishing agent storage container 20 can be rapidly increased. Therefore, according to the fire extinguishing apparatus 1, the maximum injection pressure of the fire extinguishing agent 22 injected from the extinguishing agent storage container 20 can be further increased, and the time for reaching the maximum injection pressure can be further shortened.

  The fire extinguisher 1 has a liquefied carbon dioxide gas 13 in a liquefied state, usually having a larger volume than the space where the carbon dioxide gas 12 is present in the carbon dioxide gas storage container 11, and is in a normal pressure state. To space 23. On the other hand, in the fire extinguisher A shown in FIG. 3, for example, the carbon dioxide gas 12 in the carbon dioxide gas storage container 11A exists, but usually has a small volume, and the liquefied carbon dioxide gas 13 vaporizes in a pressurized space. . In this case, since the volume is small and the pressure is increased, the liquefied carbon dioxide gas 13 is gradually vaporized, the generation rate of the carbon dioxide gas is slow, and the generation amount is small. Therefore, the fire extinguisher 1 vaporizes the liquefied carbon dioxide gas 13 led out to the space 23 more quickly than the fire extinguisher A shown in FIG. 3, for example, and generates a large amount of carbon dioxide. Therefore, according to the fire extinguishing apparatus 1, the maximum injection pressure of the fire extinguishing agent 22 injected from the extinguishing agent storage container 20 can be further increased, and the time for reaching the maximum injection pressure can be further shortened.

  Further, the liquefied carbon dioxide gas 13 led out from the carbon dioxide gas storage container 11 to the fire extinguisher storage container 20 is quickly vaporized in the fire extinguisher storage container 20, and its volume expands all at once in a very short time. The fire-extinguishing agent 22 can be injected at a desired injection pressure simply by guiding 13 to the fire-extinguishing agent storage container 20.

  Moreover, since the fire extinguisher 1 leads out the liquefied carbon dioxide gas 13 in the liquefied state to the fire extinguisher storage container 20 as described above, almost all of the fire extinguishing agent 22 accommodated in the fire extinguisher storage container 20 is further increased. It can be jetted in a short time.

  Thus, the liquefied carbon dioxide derivation device according to the present invention is used by being suitably connected to a fire extinguisher, particularly a fire extinguisher storage container.

  In the fire extinguisher 1, the liquefied carbon dioxide gas 13 is normally injected from the injection nozzle 25 together with the fire extinguishing agent 22 because a small amount of the liquefied carbon dioxide gas 13 is used as the pressurized gas for pressurizing the fire extinguishing agent 22. There is hardly anything. Excess carbon dioxide may be injected after all of the fire extinguishing agent has been released. However, since the amount of injected carbon dioxide is small, the oxygen concentration is lowered to the extent that it affects the human body. There is nothing. Therefore, even if the carbon dioxide gas is dangerous, the fire extinguishing apparatus 1 can be suitably and safely used for, for example, a fire in the presence of an operator, a fire in a sealed space, and the like.

  Further, the fire extinguishing apparatus 1 is characterized by using a carbon dioxide gas storage container 11 that contains liquefied carbon dioxide gas 13 in the lower part and uses carbon dioxide gas 12 in the upper part and does not include a siphon tube. The structure of the container 11 itself, that is, the structure of the fire extinguisher 1 is simplified, and the handleability is excellent. Therefore, for example, the fire extinguisher 1 can be miniaturized, and the fire extinguisher 1 may be configured as a built-in (fixed) fire extinguisher or may be configured as a mobile fire extinguisher. It may be configured as a portable fire extinguisher.

  A fire extinguishing apparatus 2 (hereinafter referred to as a fire extinguishing apparatus 2 according to the present invention) as another embodiment of the fire extinguishing apparatus according to the present invention will be described. In addition, in FIG. 2, the carbon dioxide gas storage container 11 and the extinguishing agent storage container 21 have shown the internal structure.

  As shown in FIG. 2, the fire extinguishing apparatus 2 according to the present invention includes a carbon dioxide gas storage container 11 mounted on a fire extinguisher storage container 21, and is integrated with the fire extinguisher storage container 21. 11 is disposed at a position lower than the extinguishing agent storage container 21, in other words, the extinguishing agent in which the liquid level of the liquefied carbon dioxide gas 13 accommodated in the lower part of the carbon dioxide gas storage container 11 is accommodated in the extinguishing agent storage container 21. The fire extinguishing apparatus 1 is basically the same as the fire extinguishing apparatus 1 except that the liquid level is lower than the liquid level. That is, the fire extinguisher 2 contains a carbon dioxide storage container 11 that contains carbon dioxide gas 12 in the upper part and a liquefied carbon dioxide gas 13 in the lower part, and a fire extinguishing agent 22, and a fire extinguisher in which the carbon dioxide storage container 11 is mounted outside. A storage passage 21 connected to the bottom of the carbon dioxide storage container 11, a lead-out path 16 for leading the liquefied carbon dioxide gas 13 from the carbon dioxide storage container 11 to the fire extinguishing agent storage container 21, and the fire extinguisher storage container 21 is provided with an injection nozzle 25 provided through a transfer path 26 for transferring the fire extinguishing agent 22.

  The fire extinguishing apparatus 2 is basically configured in the same manner as the fire extinguishing apparatus 1, and the liquefied carbon dioxide gas 13 in a liquefied state having a small volume is led to the fire extinguisher storage container 21 through the lead-out path 16 in a short time, thereby The gas 13 can be expanded into the carbon dioxide gas having a very large volume in the fire extinguisher storage container 21 at once at a very short time. Therefore, the fire extinguishing device 2 can achieve the same effect as the fire extinguishing device 1.

  The fire extinguisher 2 has a carbon dioxide gas storage container 11 and a fire extinguisher storage container 21 integrated with each other, so that the fire extinguishing apparatus 2 is excellent in ease of installation, and also has mobility as a movable and portable fire extinguishing apparatus. Are better.

  The liquefied carbon dioxide derivation device and the fire extinguishing device according to the present invention are not limited to the above-described embodiments, and various modifications can be made within a range in which the object of the present invention can be achieved. For example, in the present invention, a regulator that adjusts the derivation amount of the liquefied carbon dioxide gas can be attached to or interposed in the discharge portion or the outlet passage. As such a regulator, a regulator etc. can be mentioned, for example. Moreover, in this invention, the pressure gauge which measures and displays the pressure of the liquefied carbon dioxide gas which distribute | circulates the inside can be attached to or installed in the discharge part or the lead-out path. Furthermore, in this invention, the stop valve which prevents the distribution | circulation of a liquid carbon dioxide gas can be mounted | worn or interposed in the lead-out path.

  Each of the fire extinguishing apparatuses 1 and 2 includes one liquefied carbon dioxide deriving device 10. However, in the present invention, a plurality of liquefied carbon dioxide deriving devices are provided, and liquefied carbon dioxide gas is simultaneously supplied from the plurality of liquefied carbon dioxide deriving devices. You may derive | lead-out to a fire extinguisher storage container, and you may derive | lead-out liquefied carbon dioxide from each liquefied carbon dioxide deriving apparatus to a fire extinguisher storage container sequentially.

  Each of the fire extinguishing apparatuses 1 and 2 includes one fire extinguishing agent storage container 20 or 21, but in the present invention, the fire extinguishing apparatus includes a plurality of fire extinguishing agent storage containers, and simultaneously injects the fire extinguishing agent from the plurality of fire extinguishing agent storage containers. Moreover, you may inject a fire extinguisher sequentially from each fire extinguisher storage container.

  In this invention, the regulator which adjusts the transfer amount of a fire extinguishing agent can also be mounted | worn or interposed in the discharge part or transfer path of a fire extinguisher. As such a regulator, a regulator etc. can be mentioned, for example. Moreover, in this invention, the pressure gauge which measures and displays the pressure of the fire extinguishing agent 22 which distribute | circulates the inside can be attached or interposed in a discharge part or a transfer path. Further, in the present invention, a stop valve for preventing the flow of the extinguishing agent can be mounted or interposed in the transfer path of the fire extinguishing device.

Example 1
As the carbon dioxide gas storage container 11, a liquefied carbon dioxide gas cylinder (filling pressure 5.7 MPa at 20 ° C.) in which 660 g of carbon dioxide was filled in a pressure-resistant container having a capacity of 1 L not equipped with a siphon tube was prepared. A container valve is attached to the discharge portion 14 of the liquefied carbon dioxide cylinder.

  In addition, as a water-based fire extinguisher, a foam extinguisher “Megafoam F-610AT” (trade name, manufactured by Dainippon Ink & Chemicals, Inc.) 40L composed of a 6% aqueous solution of a fluorosurfactant was provided with a siphon tube 28. The fire extinguisher storage container 20 was prepared by enclosing in a pressure-resistant container having a capacity of 61 L.

  Next, the liquefied carbon dioxide gas cylinder 11 is inverted, the discharge part 14 is fixed in a state of being disposed below, and the discharge part 14 of the liquefied carbon dioxide gas cylinder 11 and the discharge part 28 of the extinguishing agent storage container 20 are connected to a copper tube (starting tube). Also connected with an inner diameter of 3.5 mm, an outer diameter of 6 mm, and a length of 200 mm, and a carbon steel pipe for pressure piping (including a siphon tube of about 13.5 m in length) in the discharge part 28 of the extinguishing agent storage container 20. )), The injection nozzle 25 was connected. In this way, the fire extinguisher 1 shown in FIG. 1 was assembled.

(Comparative Example 1)
The liquefied carbon dioxide gas cylinder 11A similar to the liquefied carbon dioxide gas cylinder 11 of the first embodiment is fixed upside down without inverting the liquefied carbon dioxide gas cylinder 11A, the discharge portion 14A of the liquefied carbon dioxide gas cylinder 11A, and the first embodiment. Extinguishing device A, which is an example of a conventional extinguishing device, was assembled in the same manner as in Example 1 except that the discharge part 28A of the extinguishing agent storage vessel 20A similar to the extinguishing agent storage vessel 20 was connected by a copper tube.

  Using the fire extinguishing apparatus 1 and the fire extinguishing apparatus A, from opening of the container valve attached to the discharge portions 14 and 14A of the liquefied carbon dioxide cylinders 11 and 11A until the extinguishing agents 22 and 22A are jetted from the jet nozzles 25 and 25A Time (hereinafter referred to as start-up time), maximum injection pressure of the extinguishing agent 22 and 22A injected from the extinguishing agent storage containers 20 and 20A (pressure gauge mounted on the discharge portions 14 and 14A of the extinguishing agent storage containers 20 and 20A (Measured by not shown)), a time from when the container valve attached to the discharge portions 14 and 14A of the liquefied carbon dioxide cylinders 11 and 11A is opened until the maximum injection pressure is reached (hereinafter referred to as maximum pressure arrival time). ), And the injection time until the injection of the fire extinguishing agents 22 and 22A is completed, respectively, and the results are shown in Table 1. Moreover, the graph which shows the relationship between the injection pressure of the fire extinguishing agent 22 in the fire extinguisher 1 of Example 1 and time is shown in FIG. 4, and the relationship between the injection pressure of the fire extinguishing agent 22A in the fire extinguishing device A of Comparative Example 1 and time is shown. The graph is shown in FIG. 5 (note that the straight line portion where the pressure in each graph is 0 (MPa) indicates the standby state before startup).

<Table 1>

  As shown in Table 1, the start-up time was 6.0 seconds for fire extinguisher A, but 4.2 seconds for fire extinguisher 1 and was shortened by 1.8 seconds. The shortening of the start-up time of 1.8 seconds in the fire extinguishing apparatuses 1 and A was a very significant result in the recent request to perform the initial fire extinguishing as soon as possible. In addition, considering the capacity of the liquefied carbon dioxide cylinders 11 and 11A and the extinguishing agent storage containers 20 and 20A in the fire extinguishing apparatus 1 and A, the shortening of the start-up time is very large, for example, a larger fire extinguisher installed in a factory or the like. It is clear that the start-up time can be further shortened with a device, and a particularly effective fire extinguishing effect can be expected.

  Moreover, although the maximum pressure arrival time of the fire extinguishing apparatus 1 is shortened by 4 seconds compared with that of the fire extinguishing apparatus A, the maximum injection pressure of the fire extinguishing apparatus 1 is increased by 40% or more compared with that of the fire extinguishing apparatus A. Thus, it has been found that such reduction in the maximum pressure arrival time and increase in the maximum injection pressure in the fire extinguishing apparatus 1 can greatly contribute to fire extinguishing activities, particularly initial fire extinguishing activities.

  Furthermore, the injection time of the fire extinguisher 1 is shortened relative to that of the fire extinguisher A, and the fire extinguisher 1 can inject a predetermined amount of fire extinguisher more quickly, greatly contributing to fire extinguishing activities, particularly initial fire extinguishing activities. I found out that I could do it.

(Example 2)
As shown in FIG. 6, in the protective section 30 having a length of 10 m, a width of 3 m, and a height of 3 m, a distance of 2.0 m along the vertical direction is provided at a height of 2.7 m and the horizontal center portion. Two spray nozzles 25 were installed. A test table 31 having a width of 2 m, a length of 4 m, and a height of 0.5 m is arranged on the floor in the protective compartment 30 along the vertical direction in the center of the horizontal direction. A 1 m square fire pan 32 was placed on the side. A deflector (not shown) was attached to each of the two injection nozzles 25 so that the spray range had a diameter of 3.0 m.

  On the other hand, as a carbon dioxide gas storage container 11, a liquefied carbon dioxide gas cylinder (filling pressure 5.7 MPa at 20 ° C.) filled with 1000 g of carbon dioxide in a pressure-resistant container having a capacity of 2 L not equipped with a siphon tube, and extinguishing agent storage of the fire extinguishing apparatus 1 A fire extinguisher storage container 20 similar to the container 20 was prepared. A container valve is attached to the discharge portion 14 of the liquefied carbon dioxide cylinder.

  Similarly to the fire extinguisher 1, the liquefied carbon dioxide cylinder 11 and the fire extinguisher storage container 20 are connected by a copper pipe, and the fire extinguisher storage container 20 is connected to a carbon steel pipe for pressure piping (about 13.5 m in length (siphon Two injection nozzles 25 were connected via a tube))). In this way, the fire extinguisher 1 shown in FIG. 1 was assembled and installed at one corner of the protective compartment 30.

  Subsequently, 1.5 L of fuel “Echinen F-1” (trade name, manufactured by Nippon Alcohol Sales Co., Ltd.) was poured into the pan 32 to ignite. After confirming the ignition of the fuel, the container valve attached to the discharge part 14 of the liquefied carbon dioxide cylinder 11 was opened, and the fire extinguishing agent 22 was injected. In this fire extinguishing test, the start-up time, the injection time until the injection of the extinguishing agent 22, and the time required for extinguishing the fire from the start of the injection of the extinguishing agent 22 (hereinafter referred to as the extinguishing time) were measured. . As a result, the start-up time was 4.4 seconds, the injection time was 30 seconds, and the fire extinguishing time was 19 seconds.

FIG. 1 is a schematic configuration diagram showing the configuration of a fire extinguishing apparatus as an embodiment of the fire extinguishing apparatus according to the present invention. FIG. 1 is a schematic configuration diagram showing the configuration of a fire extinguishing apparatus as another embodiment of the fire extinguishing apparatus according to the present invention. FIG. 3 is a schematic configuration diagram illustrating a configuration of a conventional fire extinguishing apparatus. FIG. 4 is a graph showing the relationship between the fire-extinguishing agent injection pressure and time in the fire-extinguishing apparatus according to the first embodiment. FIG. 5 is a graph showing the relationship between the fire extinguishing agent injection pressure and time in the fire extinguishing apparatus of Comparative Example 1. FIG. 6 is a top perspective view of the protective compartment in the fire fighting test of Example 2 as viewed from above.

Explanation of symbols

1, 2, A Fire extinguishing device 10 Liquefied carbon dioxide gas derivation device 11, 11A Carbon dioxide gas storage container 12, 12A Carbon dioxide gas 13, 13A Liquefied carbon dioxide gas 14, 14A, 28, 28A Discharge portions 15, 15A, 16 Derivation passages 20A, 21 Extinguishing agent storage container 22, 22A Extinguishing agent 23 Space 25, 25A Injection nozzle 26 Transfer path 24 Discharge pipe (siphon pipe)
30 Protective area 31 Test stand 32

Claims (2)

A carbon dioxide storage container for storing carbon dioxide in the upper part and liquefied carbon dioxide in the lower part,
An apparatus for deriving liquefied carbon dioxide, comprising a lead-out path connected to a bottom portion of the carbon dioxide storage container and for deriving the liquefied carbon dioxide from the carbon dioxide storage container. A carbon dioxide storage container for storing carbon dioxide in the upper part and liquefied carbon dioxide in the lower part,
A fire extinguisher storage container for containing a fire extinguisher,
A lead-out path connected to the bottom of the carbon dioxide storage container and leading the liquefied carbon dioxide gas from the carbon dioxide storage container to the fire extinguishing agent storage container;
A fire extinguishing apparatus, comprising: a spray nozzle provided in the fire extinguisher storage container via a transfer path for transporting the fire extinguishing agent.

Images