JP4848105B2 - Fire extinguisher - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a fire extinguishing apparatus, and more particularly, when supplying a liquefied fire extinguishing gas to a protection zone where fire extinguishing activity is to be performed, there is no decrease in the supply pressure of the supplied liquefied fire extinguishing gas, and the liquefied fire extinguishing gas has a predetermined pressure. It relates to a fire extinguisher that can continue to be supplied.
[0002]
[Prior art]
The conventional fire extinguishing apparatus, for example, if each room in the building is a protection section, a nozzle that is disposed in each protection section, and that ejects liquefied fire extinguishing gas as a fire extinguishing gas, and a nozzle connected to the nozzle, A liquefied fire extinguishing gas storage tank for storing liquefied fire extinguishing gas and pressurized gas, in which a transport line for transporting liquefied fire extinguishing gas and a transport line extending from each protective section are combined and combined, and each protective section And an opening / closing valve that opens and closes the transfer line, and a driving device that opens the opening / closing valve.
[0003]
In this fire extinguisher, by driving the drive device, the on-off valve coupled to the transfer line in the specific protection section is opened, so that the liquefied fire extinguishing gas in the liquefied fire extinguishing gas storage tank is passed through the transfer line. It is made to transfer to the nozzle of a protection zone, and the fire extinguishing gas is ejected from a nozzle, By this, the fire in a protection zone can be extinguished.
[0004]
[Problems to be solved by the invention]
However, in such a conventional fire extinguishing apparatus, when the liquefied fire extinguishing gas is sent from the liquefied fire extinguishing gas storage tank to the transfer line, the volume of the liquefied fire extinguishing gas in the liquefied fire extinguishing gas storage tank decreases, Therefore, the occupied space of the pressurized gas in the liquefied fire extinguishing gas storage tank in which the pressurized gas is stored increases. When the occupied space in the liquefied fire extinguishing gas storage tank in which the pressurized gas is stored increases, the pressure of the pressurized gas in the liquefied fire extinguishing gas storage tank decreases.
[0005]
In this case, when the conveying line is long, the momentum at which the fire extinguishing gas is ejected from the nozzle is reduced, so that the liquefied gas cannot be released within a specified time.
[0006]
An object of the present invention is to solve the aforementioned problems. That is, an object of the present invention is to provide a fire extinguisher capable of ejecting a fire extinguishing gas from a nozzle without causing the momentum of the fire extinguishing gas ejected from the nozzle to decay within a specified time even if the transport line is long. .
[0007]
Another object of the present invention is to provide a fire extinguishing apparatus having a simple structure and capable of achieving the object.
[0008]
Means of the present invention for solving the above-mentioned problems include a liquefied fire extinguishing gas storage tank for storing a liquefied fire extinguishing gas and a pressurized gas, a pressurized gas storage tank for press-fitting the pressurized gas, and a protective section to be extinguished. When the liquefied fire extinguishing gas is to be supplied to the liquefied fire extinguishing gas storage tank, the pressure gas applied to the liquefied fire extinguishing gas storage tank A pressurized gas supply starting device for preventing a decrease, and the pressurized gas supply starting device transfers the pressurized gas in the pressurized gas storage tank into the liquefied fire extinguishing gas storage tank; and A normally closed first normally closed valve that prevents the pressurized gas in the pressurized gas storage tank from being led out to the pressurized gas outlet pipe, and a gas flow path for deriving the liquefied fire extinguishing gas in the liquefied fire extinguishing gas storage tank, The liquefied fire extinguishing gas in the liquefied fire extinguishing gas storage tank From the normally closed second normally closed valve, the branch conveying pipe connecting the first normally closed valve and the second normally closed valve, and the second normally closed valve in the open state It is a fire extinguishing apparatus having an activation means for opening the first normally closed valve by liquefied fire extinguishing gas conveyed through a branch conveyance pipe.
[0009]
In a preferred aspect of the fire extinguishing apparatus, the pressurized gas supply activation device is further closed normally in the middle of a branch gas flow path for transferring the liquefied fire extinguishing gas in the gas flow path to each protection section. And the starting means opens the second normally closed valve, and further opens the third open / close valve corresponding to the protection section.
[0010]
According to the fire extinguishing apparatus according to the means of the present invention, for example, when a fire occurs in a certain protection section, the pressurized gas supply starting apparatus is activated. Then, the liquefied fire extinguishing gas starts to be transported from the liquefied fire extinguishing gas storage tank toward the protection section. The pressurized gas is supplied from the pressurized gas storage tank to the liquefied fire extinguishing gas storage tank by the operation of the pressurized gas supply starter with the start of the transportation of the liquefied fire extinguishing gas. In the liquefied fire extinguishing gas storage tank, if the pressurized gas is not supplied, the liquefied fire extinguishing gas is discharged from the liquefied fire extinguishing gas storage tank, thereby increasing the occupied volume of the pressurized gas in the liquefied fire extinguishing gas storage tank. Although the pressurizing pressure of the pressurized gas is reduced, the pressurized gas is supplied from the pressurized gas storage tank to the liquefied fire extinguishing gas storage tank. The pressure drop is reduced. Therefore, since the extrusion pressure of the liquefied fire extinguishing gas discharged from the liquefied fire extinguishing gas storage tank does not drop significantly, the total length of the gas flow path and the branch gas flow path that are the transfer lines from the nozzles arranged in the protection section Even if the length is long, the liquefied gas is ejected within a specified time defined by, for example, the Fire Service Law. As a result, fire extinguishing activities can be sufficiently performed in the protected area.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
The present invention will be described with reference to examples. The present invention is not limited to the following embodiments, and various design changes can be made within the scope of the gist of the present invention.
[0012]
As shown in FIG. 1, a fire extinguisher 1 according to an embodiment of the present invention includes a liquefied fire extinguishing gas storage tank 2, a pressurized gas storage tank 3, and a pressurized gas supply starter 4.
[0013]
The liquefied fire extinguishing gas storage tank 2 is filled with a liquid liquefied fire extinguishing gas 5 and a pressurized gas 6. Examples of the liquefied fire extinguishing gas include halon gas. An example of the pressurized gas is an inert gas such as nitrogen gas. The pressurized gas 6 is filled in the liquefied fire extinguishing gas storage tank 2 at a pressure of, for example, 2.5 MPa.
[0014]
A first container valve 7 is attached to the top of the liquefied fire extinguishing gas storage tank 2. The first container valve 7 is connected to an introduction pipe 8 that extends in the vertical direction inside the liquefied fire extinguishing gas storage tank 2, and is a transport pipe 9 that is a gas flow path that extends to the middle of each protection section. Combined with The transfer pipe 9 is branched into a plurality of branch pipes 10 corresponding to the number of protection sections on the way, which are branch gas flow paths, and an open / close valve 11 is interposed in each branch pipe 10. Each open / close valve 11 is provided with an activation device 12 for opening and closing the valve.
[0015]
The first container valve 7 includes a normally closed valve device 13 shown in FIG. 2 and a valve opening device 14 shown in FIG. 3 which is a normally closed valve.
[0016]
The normally closed valve device 13 includes a storage tank mounting portion 15 and a valve main body portion 16. The storage tank mounting portion 15 is mounted on the top of the liquefied fire extinguishing gas storage tank 2 and has an introduction flow path 17 so as to communicate with the introduction pipe 8 in the liquefied fire extinguishing gas storage tank 2. The valve body portion 16 is coupled so as to be in communication with the transport pipe 9 and is formed so as to be able to communicate with the introduction flow channel 17, and the same axis as the axis of the discharge flow channel 18. An internal cylindrical valve chamber 19, a cylindrical valve body 20 movable in the valve chamber 19 along the axis in the valve chamber 19, the outlet channel 18 and the inlet channel 17. A first urging member 21, for example, a coil spring, that urges the valve body 20 so as to close the lead-out flow path 18 at the front end surface so as to be always closed, and a distal end portion of the valve body 20 in the valve chamber 19. Even if the distal end surface of the valve body 20 closes the end opening of the outlet flow path 18, the introduction flow is provided annularly on the inner peripheral surface in the vicinity of the end opening of the outlet flow path 18. The annular groove 22 formed in communication with the path 17, A thin film 23 disposed in an opening provided on an end surface of the chamber 19 opposite to the outlet flow path 18, and a mounting tube provided outside the valve chamber 19 for mounting the valve opening device 14. 24 and a gas vent hole 25 formed through the mounting tube 24. In the normally closed valve device 13, when the storage tank mounting portion 15 in the normally closed valve device 13 is mounted on the top of the liquefied fire extinguishing gas storage tank 2, the liquefied fire extinguishing gas in the introduction pipe 8 fills the introduction flow path 17. At the same time, the valve chamber 19 is also filled through the clearance between the annular groove 22 and the cylindrical outer peripheral surface of the valve body 20 and the inner peripheral surface of the valve chamber 19, and accordingly, the urging force of the first urging member 21 and the liquefied extinguishing gas Due to the pressure, the front end surface of the valve body 20 is in a state of constantly closing the rear end opening of the outlet channel 18.
[0017]
On the other hand, as shown in FIG. 3, the valve opening device 14 includes a gas introduction path 26 for introducing gas, a piston portion 29 that is accommodated in the cylinder portion 27 so as to be advanced, and includes a cutter 28 at the tip portion. A second urging member 30 that urges the piston 29 so that the piston 29 is always retracted, and the cutter 28 is a thin film in the normally closed valve device 13 when the piston 29 is fully advanced. The valve opening device 14 is connected to the mounting pipe 24 so that the valve opening device 14 can be broken.
[0018]
In FIG. 3, one end opening of the gas introduction path 26 extends from the activation device 12, and an activation gas conveyance path 26 for leading the activation gas is coupled, and the other end opening of the gas introduction path 26 is sealed. Has been.
[0019]
Note that the size of the normally closed valve device 13 shown in FIG. 2 and the valve opening device 14 shown in FIG.
[0020]
The starting device 12 is formed to have a function of starting the valve opening device 14 in the first container valve 7 at the same time as opening the on-off valve 11 that is normally closed.
[0021]
In this embodiment, as shown in FIG. 1, the activation device 12 includes a gas introduction pipe 33 for introducing the high-pressure gas in an activation vessel 32 filled with high-pressure gas, and as shown in FIG. The cylinder chamber 34 into which the gas from the gas introduction pipe 33 is press-fitted, and the cylinder chamber 34 is loaded so as to be able to advance, and is normally disposed so as to close the opening in the cylinder chamber 34 of the gas introduction pipe 33. A piston plate 35, a starting gas transfer path 32 disposed so that the opening is exposed in the cylinder chamber 34 when the piston plate 35 partitions the cylinder chamber 34 forward by gas pressure, and the piston plate 35. Is provided with a drive pin 37 coupled to the piston board 35 so that the rotary shaft 36 is rotated so that the on-off valve 11 is opened by the forward movement.
[0022]
The rotary shaft 36 is coupled to the ball valve body 38 so that the ball valve body 38 in the on-off valve 11 can be rotated. As shown in FIG. 4, the on-off valve 11 further includes a branch pipe introduction path 39 that is interposed in the middle of the branch pipe 10 and is coupled to the branch pipe 10 on the transport pipe 9 side, and a protective section. And a branch pipe lead-out path 40 coupled to the branch pipe 10 that extends, and a spherical ball valve body 38 interposed between the branch pipe lead-in path 39 and the branch pipe lead-out path 40. The ball valve body 38 has a through hole 41.
[0023]
The gas introduction pipe 33 connected to the starting vessel 32 is normally closed, and when a command signal from the monitoring unit 42 is input, the gas introduction pipe 33 is opened. For example, an open valve device 43 formed using a solenoid is interposed.
[0024]
A second container valve 44 having the same configuration as the first container valve 7 disposed at the top of the liquefied fire extinguishing gas storage tank 2 is disposed at the top of the pressurized gas storage tank 3. The second container valve 44 is different from the first container valve 7 in that the branch gas transport pipe branched from the transport pipe 9 instead of connecting the starting gas transport path 32 to the gas introduction path 26 in the valve opening device 14. 45, and a pressurized gas outlet pipe for leading pressurized gas to the liquefied fire extinguishing gas storage tank 2, instead of connecting the end of the transport pipe 9 to the outlet flow path 18 in the normally closed valve device 13. 46 is connected.
[0025]
At the top of the liquefied fire extinguishing gas storage tank 2, a check valve that is connected to the pressurized gas outlet pipe 46 and prevents the pressurized gas in the liquefied fire extinguishing gas storage tank 46 from flowing backward is mounted. Is done.
[0026]
In this embodiment, as can be understood from the above description, the pressurized gas supply activation device 4 opens the on-off valve 11 by the activation means 12 and is filled in the fire extinguishing liquefied gas storage tank 2. The liquefied fire extinguishing gas is delivered to the protection compartment, and the pressurized gas in the pressurized gas storage tank 3 is configured to be press-fitted and conveyed to the liquefied fire extinguishing gas storage tank 2. The gas transport path 32, the first container valve 7, the branch transport pipe 45, the second container valve 44, and the pressurized gas outlet pipe 46 are formed.
[0027]
In FIG. 1, the starting gas transport path 32 is drawn so as to connect one starting means 12 and the first container valve 7, but in the present invention, the same number of starting means 12 as the number of protection sections. And the first container valve 7 are coupled to each other by an activation gas transfer path 32.
[0028]
The fire extinguishing apparatus having the above configuration operates as follows.
[0029]
When the monitoring device 42 detects a fire in the protection zone, a command signal is output from the monitoring device 42 to the open valve device 43 in the startup device 12 to start the startup device 12 corresponding to the protection zone. The open valve device 43 is actuated by the command signal, and the high-pressure gas in the activation vessel 32 is press-fitted into the cylinder chamber 34 through the gas introduction pipe 33. The piston board 35 in the cylinder 34 advances by the high-pressure gas thus injected. When the piston board 35 is fully advanced, the drive pin 37 rotates the rotating shaft 36, and the ball valve 38 that has been closed in the on-off valve 11 is rotated so that the branch pipe introduction path 39 and the branch pipe lead-out. The road 40 is in communication.
[0030]
On the other hand, the high-pressure gas press-fitted into the cylinder chamber 34 is press-fitted into the gas introduction path 26 in the valve opening device 14 through the starting gas transfer path 32. The press-fitted high pressure gas instantaneously advances the piston portion 29 against the urging force of the second urging member 30. The thinned portion 23 of the normally closed valve device 13 is broken by the cutter 28 coupled to the tip of the piston portion 29 that has advanced.
[0031]
When the thin film 23 is broken, the pressurized gas filled in the valve chamber 19 escapes from the broken portion of the thin film 23 to the outside. The pressurized gas that has escaped is discharged to the outside through the vent hole 25.
[0032]
When the pressurized gas in the valve chamber 19 is released, the valve body 20 moves and is introduced against the urging force of the first urging member 21 due to the pressure of the pressurized gas filling the annular groove 22. The channel 17 and the outlet channel 18 are in communication.
[0033]
When the introduction flow path 17 and the lead-out flow path 18 are in communication, the liquefied fire extinguishing gas that has received the pressure of the pressurized gas in the liquefied fire extinguishing gas storage tank 2 is pushed out from the introduction pipe 8 to the transfer pipe 9 and is opened. It flows to the branch pipe 10 in which the on-off valve 11 is interposed, and is transferred to the protection section.
[0034]
In the protective section, liquefied fire extinguishing gas is discharged as a gas from a nozzle (not shown) attached to the end of the branch pipe 10.
[0035]
Further, the liquefied fire extinguishing gas press-fitted into the transport pipe 9 travels through the branch transport pipe 45 and reaches the gas introduction path 26 of the valve opening device 14 in the second container valve 44. The liquefied fire extinguishing gas that has reached the gas introduction path 26 advances the cutter 28 by its pressure and breaks the thin film 23 in the normally closed valve device 13. Due to the breakage of the thin film 23, the valve body 20 moves and the introduction flow path 17 and the discharge flow path 18 are brought into communication.
[0036]
When the communication state is established, the pressurized gas in the pressurized gas storage tank 3 is pressurized and injected into the liquefied fire extinguishing gas storage tank 2 through the pressurized gas outlet pipe 46.
[0037]
The above operation is executed instantaneously.
[0038]
When the liquefied gas in the liquefied fire extinguishing gas storage tank 2 is supplied to the protection section via the transport pipe 9, the volume occupied by the pressurized gas (occupied volume) in the liquefied fire extinguishing gas storage tank 2 increases. When the occupied volume of the pressurized gas increases, the pressure by which the pressurized gas pressurizes the liquefied fire extinguishing gas decreases. However, since the pressurized gas is injected and supplied from the pressurized gas storage tank 3, A decrease in the pressure of the pressurized gas that pressurizes the liquefied fire extinguishing gas that would occur with an increase in the occupied volume is compensated. That is, in the liquefied fire extinguishing gas storage tank 2, the liquefied fire extinguishing gas storage tank is supplied by the pressurized gas supplied from the pressurized gas storage tank 3 in spite of an increase in the pressurized gas occupation volume accompanying a decrease in the amount of the liquefied fire extinguishing gas. A decrease in the pressure of the pressurized gas in 2 is prevented, and the liquefied fire extinguishing gas is supplied to the protection section at a predetermined gas pressure or higher.
[0039]
As a result, in the protective section, even if the lengths of the transfer pipe 9 and the branch pipe 10 are long, the fire extinguishing gas is released within a specified time without reducing its momentum, and the fire extinguishing by the fire extinguishing gas is performed. The action is executed.
[0040]
As mentioned above, although one Example of this invention was described, this invention is not limited to the said Example.
[0041]
For example, in the present invention, as long as the pressurized gas is supplied from the pressurized gas storage tank to the liquefied fire extinguishing gas storage tank simultaneously with the release of the liquefied fire extinguishing gas from the liquefied fire extinguishing gas storage tank, Various configurations other than those shown in the example fire extinguishing device can be employed.
[0042]
For example, instead of the pressurized gas supply activation device that operates the on-off valve, the first container valve, and the second container valve by gas pressure, the on-off valve, the first container valve, and the second container valve are received by receiving an electrical signal. It is also possible to employ a pressurized gas supply activation device configured to operate.
[0043]
The number of liquefied fire extinguishing gas storage tanks is not limited to one, and a plurality of liquefied fire extinguishing gas storage tanks may be provided, and a plurality of pressurized gas storage tanks may be provided. In that case, for example, one liquefied fire extinguishing gas storage tank and one pressurized gas storage tank are arranged from the first protection section to the tenth protection section, and from the eleventh protection section to the twentieth protection section, A plurality of protective compartments are blocked such that another one liquefied fire extinguishing gas storage tank and another one pressurized gas storage tank are provided, and the fire extinguishing apparatus according to the present invention is provided for each block. May be.
[0044]
Furthermore, when the amount of the liquefied fire extinguishing gas stored in one liquefied fire extinguishing gas storage tank is insufficient, a plurality of liquefied fire extinguishing gas storage tanks are provided, and the liquefied fire extinguishing gas in one liquefied fire extinguishing gas storage tank is provided. It is also possible to configure so that the liquefied fire extinguishing gas in the next liquefied fire extinguishing gas storage tank is transported to the transport pipe when the exhaust is exhausted.
[0045]
【The invention's effect】
According to the present invention, there is provided a fire extinguishing apparatus having a simple device configuration capable of ejecting a fire extinguishing gas from a nozzle without causing the momentum of the fire extinguishing gas ejected from the nozzle to decay within a specified time even if the conveying line is long. be able to.
[Brief description of the drawings]
FIG. 1 is a conceptual diagram showing a configuration example of a fire extinguishing apparatus according to the present invention.
FIG. 2 is a cross-sectional explanatory view showing a normally closed valve device in one configuration example of a fire extinguishing device according to the present invention.
FIG. 3 is a cross-sectional explanatory view showing a valve opening device in one structural example of a fire extinguishing device according to the present invention.
FIG. 4 is a cross-sectional explanatory view showing an activation device in one configuration example of a fire extinguishing device according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Fire extinguishing apparatus, 2 ... Liquefied fire extinguishing gas storage tank, 3 ... Pressurized gas storage tank,
4 ... pressurized gas supply starting device, 5 ... liquefied fire extinguishing gas, 6 ... pressurized gas,
7 ... 1st container valve, 8 ... Introducing pipe, 9 ... Conveying pipe, 10 ... Branch pipe,
11 ... Open / close valve, 12 ... Starter, 13 ... Normally closed valve,
14 ... Valve opening device, 15 ... Storage tank mounting part, 16 ... Valve body part,
17 ... Introducing flow path, 18 ... Deriving flow path, 19 ... Valve chamber, 20 ... Valve body,
21 ... first biasing member, 22 ... annular groove, 23 ... thin film,
24 ... mounting pipe, 25 ... gas vent hole, 26 ... gas introduction path,
27 ... Cylinder part, 28 ... Cutter, 29 ... Piston part,
30 ... 2nd biasing member, 31 ... connection part, 32 ... starting container,
33 ... Gas introduction pipe, 34 ... Cylinder chamber, 35 ... Piston board,
36 ... Rotating shaft, 37 ... Drive pin, 38 ... Ball valve element,
39 ... Branch pipe introduction path, 40 ... Branch pipe lead-out path, 41 ... Through hole,
42 ... monitoring device, 43 ... open valve device, 44 ... second container valve,
45... Branch transfer pipe, 46... Pressurized gas outlet pipe, 47.

Claims (2)

A liquefied fire extinguishing gas storage tank for storing a liquefied fire extinguishing gas and a pressurized gas, a pressurized gas storing tank for storing a pressurized gas, and the pressurized gas when supplying the liquefied fire extinguishing gas to a protective compartment to be extinguished. A pressurized gas supply activation device that prevents a decrease in pressure applied to the liquefied fire extinguishing gas in the liquefied fire extinguishing gas storage tank by supplying the pressurized gas in the storage tank into the liquefied fire extinguishing gas storage tank ;
The pressurized gas supply starter is
A pressurized gas outlet pipe for transferring the pressurized gas in the pressurized gas storage tank into the liquefied fire extinguishing gas storage tank;
A normally closed first normally closed valve that prevents the pressurized gas in the pressurized gas storage tank from being led to the pressurized gas outlet pipe;
A gas flow path for deriving the liquefied fire extinguishing gas in the liquefied fire extinguishing gas storage tank,
A normally closed second normally closed valve for preventing the liquefied fire extinguishing gas in the liquefied fire extinguishing gas storage tank from being led to the gas flow path;
A branch conveyance pipe that connects the first normally closed valve and the second normally closed valve;
Activation means for opening the first normally closed valve by the liquefied fire extinguishing gas conveyed through the branch conveying pipe from the second normally closed valve which has been opened.
A fire extinguishing device comprising: The pressurized gas supply activation device further includes a normally closed third on-off valve interposed in the middle of the branch gas flow path for transferring the liquefied fire extinguishing gas in the gas flow path to each protection section,
The starting means opens the second normally closed valve, and further opens the third on-off valve corresponding to the protection section;
The fire extinguishing apparatus according to claim 1.

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