JPH07299158A - Gas system extinguishing equipment - Google Patents

Abstract

PURPOSE:To ease a pressure in a piping when an extinguishing agent is discharged by mounting an orifice in a piping from an outlet of an extinguishing agent storage container to an inlet of a zone to be extinguished, in an extinguishing equipment which discharges the extinguishing agent from an extinguishing agent jetting head to subdue a fire. CONSTITUTION:In this gas system extinguishing equipment, a container valve 2 is opened electrically or pneumatically and an inert extinguishing agent as gas with a high pressure, for example, with a pressure of 20MPa flows out to a collection pipe 4 via a connecting pipe 3 from an extinguishing agent storage container 1 and enters a main piping 5 passing through an orifice 10. At this point, adiabatic expansion occurs with the orifice 10 and the pressure drops, for example, down to 10MPa. As a result, the extinguishing agent shifts to a medium pressure, flows through the main piping 5 to a branch pipe 8, finally reaching a jetting head 7 and discharged into the atmospheric air to fill a zone 6 to be extinguished thereby subduing a fire. Thus, the easing of the pressure of the main piping 5 and the branch pipe 8 occupying the most of the piping with the orifice 10 are enabled.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to fire extinguishing equipment using an inert gas as a fire extinguishing agent. More specifically, a pipe for relaxing the pressure of the extinguishant when the inert gas extinguishant filled in the extinguishant storage container at a high pressure is released from the extinguishant storage container and flows in the pipe. It is about the system.

[0002]

2. Description of the Related Art FIGS. 10 and 11 show examples of installation of conventional gas fire extinguishing equipment. Conventionally, the extinguishing agents used in gas-based fire extinguishing equipment are so-called liquefied gases such as carbon dioxide and halon gas, and these extinguishing agents are pressurized and liquefied and filled into a high-pressure gas container to be used as an extinguishant storage container. To do. Figure 10
, 21 are fire extinguishing agent storage containers, and connecting pipes 23, 23, ... Are provided at the outlets of the container valves 22, 22 attached to the extinguishing agent storage containers 21, 21 ,.
, And connecting pipes 23, 23 ...
4 and then the collecting pipe 24 is connected to the main pipe 25. The main pipe 25 is attached to each of the jet heads 27, 27, ...
5 through branch pipes 28, 28, ... In the event of a fire, by opening the container valves 22, 22, ... Electrically or pneumatically (both means not shown), liquefied gas from the storage containers 21, 21 ,. That is, the liquid extinguishant flows out into the collecting pipe 24 through the connecting pipes 23 ,. Then, the extinguishant in the state of liquefied gas flows from the main pipe 25 through the branch pipes 28, 28, ... And reaches the jet heads 27, 27 ,. At that moment, the liquid extinguishant vaporizes for the first time into a gaseous state, filling the extinguishing target compartment and suppressing the fire.

Further, in the example of installation of the gas-based fire extinguishing equipment in the case where there are a plurality of fire extinguishing target compartments shown in FIG. 11, the extinguishant storage containers 21, 21, ..., Container valves 22, 22 ,. , 23, ..., And the structure of the collecting pipe is the same as that of FIG. 9, but a plurality of fire extinguishing target sections 26-1, 2 are provided at the tip of the collecting pipe 24.
Selection valve 2 for each of 6-2, ..., 26-N ,.
9-1, 29-2, ..., 29-N, ... are provided, and each of the selection valves 29-1, 29-2, ..., 29-N, ... is normally provided for each fire extinguishing target compartment. Main piping with different diameter 2
5-1, 25-2, ..., 25-N, ... are connected, and the fire extinguishing target sections 26-1, 26-2, ..., 26-N, ...
Of the jet heads 27-arranged at important points inside each of the
1, 27-1, ..., 27-2, 27-2 ,.
Main pipe 2 for each of 27-N, 27-N, 27-N
25-1, 25-2, ..., 25-N, branch pipes 28-1, 28-1, ..., 28-2, 28-2, which branch from
Connect via 28-N, 28-N, 28-N ,. Normally, the extinguishing target sections 26-1, 26-2, ...
.., 26-N, ... have different sizes, so there is a difference in the amount of the required extinguishant to be released. Therefore, when the fire extinguishing equipment is started, the fire extinguishing target sections 26-1, 26-
The number of extinguishant storage containers 21, 21, ... The operation procedure will be described below.

FIG. 12 shows the details of the fire extinguishing equipment shown in FIG. 11 including the piping of the starting gas pipeline.
An example in the case of three partitions of -1, 26-2 and 26-3 is shown. Here, the number of extinguishant storage containers to be opened is 5 in the fire extinguishing target section 26-1, 3 in 26-2, and 2 in the section.
It is assumed that there is one 6-3. 29-1, 29-2 and 29-3 are selector valves, 30-1, 30-2 and 30-3.
Is a selection valve opening device, 31-1, 31-2 and 31-3 are starting gas containers filled with an inert gas such as carbon dioxide,
32-1, 32-2 and 32-3 are solenoids for opening the starting gas container, and the numbers 1, 2 at the end of these devices,
And 3 correspond to the numbers 1, 2, and 3 at the end of the fire extinguishing target compartment, respectively. 33, 33, ... are gas lines for starting which control the opening of the selection valve and the extinguishant storage container, and the selection valve opening devices 30-1, 30-2, 30-3 and the container valves 22, 22 ,. And non-return valves 34-1, 34-2, 34-3, 34-A and 3 at key points along the way.
4-B is inserted. The direction in which the non-return valve can pass is represented by the direction of the arrow in the figure. The number of extinguishant storage containers and the number of connecting pipes are each 5, and the other device arrangements, that is, the collecting pipe 24, the main pipes 25-1, 25-2, 25-3, the ejection heads 27-1, 27-1 ,. ..., 27-2, 27-
2, ..., 27-3, 27-3, ... Branch pipes 28-1, 2
8-1, ... 28-2, 28-2, ..., ..., 28-
The numbers 3, 28-3, ...

In the event of a fire, if the fire extinguishing target area is 26-1, for example, when the fire operator operates a push button (not shown) corresponding to this area, an electric signal is sent to the starting gas container. Sent to the opening solenoid 32-1
Solenoid 32-1 operates to start gas container 31-1
Opens. The starting gas released from the starting gas container 31-1 passes through the non-return valve 34-1 and the starting gas line 33, and also passes through the non-return valves 34-A and 34-B.
Fire extinguishant storage containers 21, 21, ...
5 valves are opened, but the non-return valves 34-2 and 34-3 cannot pass, so the selection valves 29-2 and 29-
3 never opens. Extinguishant storage containers 21, 21,
The extinguishing agent released from ... and flowing out into the collecting pipe 24 through the connecting pipes 23, 23, ... is opened to the selection valve 29-.
1. Main pipe 25-1 and branch pipes 28-1, 28-1, ...
Through the jet heads 27-1, 27-1, ..., It is radiated into the fire extinguishing target section 26-1 to suppress the fire.
When the fire extinguishing target compartment is 26-2, when a fire finder operates a push button (not shown) corresponding to this compartment, an electric signal is sent to the starting gas container opening solenoid 32-2 and the solenoid 32--. 2 operates to start gas container 3
1-2 opens. The starting gas released from the starting gas container 31-2 passes through the non-return valve 34-2 and the starting gas line 3
3, the non-return valve 34-B, and the extinguishant storage container 2
, 3 are opened, but the non-return valve 34-A does not pass through, so two of the extinguishant storage containers are not opened,
And since the return valves 34-1 and 34-3 do not pass,
The selection valves 29-1 and 29-3 never open. The extinguishant storage containers 21, 21, ...
The extinguishant that has flowed out to the collecting pipe 24 via 3, 23, ... Is passed through the opened selection valve 29-2, the main pipe 25-2 and the branch pipes 28-2, 28-2 ,. 27-
2, 27-2, ... Are radiated into the fire extinguishing target section 26-2 to suppress the fire.

When the fire extinguishing target compartment is 26-3, when a fire finder operates a push button (not shown) corresponding to this compartment, an electric signal is sent to the starting gas container opening solenoid 32-3. The solenoid 32-3 operates to open the starting gas container 31-3. Starting gas container 31-
The starting gas released from No. 3 passes through the non-return valve 34-3 and the starting gas pipeline 33 to open only one extinguishant storage container 21, but the rest of the non-return valve 34-B does not pass. 4 fire extinguishant storage containers were not opened, and non-return valve 34-1
And 34-2 do not pass, so the selection valves 29-1 and 2
9-2 never opens. The extinguishant released from the extinguishant storage container 21 and flowing out to the collecting pipe 24 through the connecting pipes 23 ... Is the opened selection valve 29-3 and the main pipe 25-3.
And the jet heads 27-3, 27-3, ... Through the branch pipes 28-3, 28-3 ,.
It is radiated into 3 and suppresses the fire. The above description is an example in the case where the number of extinguishing target compartments is 3 and the number of extinguishant storage containers is 5, but the number of extinguishing target compartments and the number of extinguishant storage containers are arbitrary, and there is no change to the above operation procedure. Instead, it is possible to install fire extinguishing equipment by combining any number of fire extinguishing target compartments and extinguishant storage containers.

However, in recent years, a problem has been raised on a global scale that a fire extinguishing agent having a halogenated hydrocarbon component containing halon gas destroys the ozone layer. It has been discontinued, and nitrogen, as one of its alternative clean extinguishants,
A method of using as a fire extinguisher a gas which is composed mainly of an inert gas such as argon and which is not liquefied even at high pressure has come into practical use.

[0008]

In the gas-based fire extinguishing equipment having the configuration shown in the examples of FIGS. 10, 11 and 12 above,
If an extinguishant storage container in which a container is filled with an inert gas such as nitrogen or argon at a high pressure is used, it is obvious that the extinguishant storage container will be directly established as a gas-based extinguishing facility. However, when the fire extinguishing agent filled in the fire extinguishing agent storage container is replaced with a high-pressure inert gas from the liquefied gas, there is a problem that the following problems occur.

(1) Conventionally used liquefied gas such as carbon dioxide and halon gas has a medium pressure of at most 10 MPa (about 100 kgf / cm 2) in the fire extinguishant storage container, whereas nitrogen Since the pressure inside the fire extinguishant storage container filled with a high-pressure inert gas such as argon is 15 MPa (about 150 kgf / cm2) to 20 MPa (about 200 kgf / cm2), it is especially high at the beginning of extinguishing agent release. Piping that withstands the above is required. (2) Currently, 20 MPa (about 200 kgf / cm2) class high-pressure piping material is less versatile than 10 MPa (about 100 kgf / cm2) class piping material, so its price is not about double. Be extremely expensive, four times or more. (3) The pressure of gas such as nitrogen and argon is 10 MPa.
If the fire extinguishing agent storage container is filled after lowering it (about 100 kgf / cm2), the problems of (1) and (2) above can be solved.
The number of extinguishant storage containers to be installed must be 1.5 to 2 times.

The present invention has been made to solve the above problems, and in a fire extinguishing facility that uses a high-pressure inert gas as a fire extinguishing agent, it is necessary to reduce the pressure in the pipe when the fire extinguishing agent is released. Is an issue.

[0011]

The first invention of the present application is a fire extinguishing facility in which a pipe is connected from an outlet of a fire extinguisher storage container filled with a high-pressure inert gas to a fire extinguishing agent injection head mounted in a fire extinguishing target compartment. At, the pipe from the outlet of the extinguishant storage container to the inlet of the fire-extinguishing target compartment (including the end of the pipe)
Equipped with an orifice. That is, an orifice is inserted in the middle of the pipe, or an orifice is provided at the end of the pipe (a connection with the outlet of the extinguishant storage container or a connection with the inlet of the fire-extinguishing target compartment). In the second aspect of the present invention, in a fire extinguishing facility in which selection valves are installed respectively corresponding to a plurality of fire extinguishing compartments, an orifice is provided in a pipe (including both ends of the pipe) from the selection valve outlet to the corresponding fire extinguishing target compartment.

[0012]

The high-pressure gas is adiabatically expanded when passing through the orifice by the orifice provided in the pipe (including both ends) which is the high-pressure gas passage, and a pressure drop occurs. As a result, the pressure in the piping portion downstream of the orifice is relieved.

[0013]

FIG. 1 shows a first embodiment of a gas fire extinguishing facility according to the first invention of the present application. 1, reference numerals 1, 1, ... Denote extinguishant storage containers filled with high-pressure inert gas, and container valves 2 attached to the extinguishant storage containers 1, 1 ,.
Connection pipes 3, 3, ... Are connected to the outlets of 2, ... And the ends of the connection pipes 3, 3 ,. The collecting pipe 4 and the main pipe 5 that reaches the fire extinguishing target section 6 and is extremely longer than the collecting pipe 4 are connected via an orifice 10 shown in FIG. The main pipe 5 is connected to each of the jet heads 7, 7, ..., Which are arranged at important points inside the fire extinguishing target compartment 6 via branch pipes 8, 8 ,.

FIG. 6 shows a detailed example of the orifice 10. The flange joints 42, 42 having a known structure are welded between the collecting pipe 4 and the main pipe 5, and the orifice hole is formed in the center between the flange faces. 7 is sandwiched between the orifice plates and tightened with a plurality of bolts 44, 44 ... And nuts 45, 45. 43 and 43 are O-rings for ensuring airtightness. The opening area of the orifice plate 41 in the orifice 10 of FIG. 6 is S with reference to FIG.

In the gas fire extinguishing equipment of the first embodiment of the first invention of the present application, in the event of a fire, the container valves 2, 2, ... Are electrically or pneumatically (both means not shown). By opening the fire extinguishant storage container 1, 1, ..., a high pressure gas inert extinguishant of, for example, 20 MPa (about 200 kgf / cm2) pressure is passed through the connecting pipes 3, 3 ,. Flow to 4. Subsequently, the extinguishant passes through the orifice 10 and enters the main pipe 2, at which time the orifice 10 adiabatically expands and the pressure drops to, for example, 10 MPa (about 100 kgf / cm 2). The extinguishing agent having a medium pressure due to a pressure drop flows through the main pipe 2 to reach the branch pipes 8, 8, ... And finally reach the jet heads 7, 7 ,. Is radiated to
The fire extinguishing agent fills the extinguishing target area to suppress the fire. With this structure, the main pipe 2 that occupies most of the pipe 2
The pressure of the branch pipes 8, 8, ... Can be relieved, and the cost of the piping material can be significantly reduced. When the pressure on the upstream side of the orifice 10 is a high pressure of, for example, 20 MPa (about 200 kgf / cm2), the pressure on the downstream side of the orifice 10 is set to a medium pressure of about 10 MPa (about 100 kgf / cm2).
It is easy to determine the dimension of 0, and an example of the method is shown below.

Regarding the flow through the orifice as shown in FIG. 6, the known equation in industrial thermodynamics is given as follows. Condition (1)

[Formula 1] When

[Formula 2] Where P1 and P2 are pressures before and after the orifice, that is, upstream and downstream pressures, κ is the specific heat ratio determined by the type of inert gas, G is the flow rate of the inert gas, A is the area of the orifice, and R is the gas constant, T1 is the temperature of the upstream side of the inert gas,
K is a constant determined by the ratio of the inner diameter of the inlet side pipe to the orifice diameter, the shape of the orifice, and the like. As can be seen from the equation A, if the pressure P1 on the upstream side, the temperature T1 and the flow rate G are given and the pressure P2 on the downstream side is specified, K, R, and κ are constants, so that the area S of the orifice can be obtained. . Also,
In cases other than (1) above, the following expression (B) is established. That is, condition (2)

[Formula 3] When

[Formula 4] However, in this case, the value of P2 / P1 does not depend on the flow rate G, for example, in the case of nitrogen gas: κ = 1.40, P2 / P1 = 0.
528 Argon gas: κ = 1.66, P2 / P1 = 0.
Since the pressure 488 on the downstream side and the pressure P2 on the downstream side are approximately half or less than the pressure P1 on the upstream side, even in the case of this condition (2), the role is sufficiently fulfilled for the purpose of pressure relaxation, which is the object of the present invention. It is clear that they will fulfill.

Next, FIG. 2 shows a gas fire extinguishing facility according to a second embodiment of the first invention of the present application. In FIG. 2, 1, 1, ...
Is a fire extinguishant storage container filled with a high-pressure inert gas, and orifices 11 and 1 are provided at the outlets of the container valves 2 and 2 attached to the extinguishant storage containers 1, 1 ,.
After inserting 1, ..., Connect the connecting pipes 3, 3 ,.
The ends of the connecting pipes 3, 3, ... Are connected to the collecting pipe 4. The collecting pipe 4 is connected to a main pipe 5 leading to the fire extinguishing target compartment 6, and the main pipe 5 is connected to each of the jet heads 7, 7, ... Are connected via branch pipes 8, 8 ...

FIG. 9 shows a detailed example of the orifice 11, which includes an end portion of the welding valve outlet 2'having a thread formed on the outer periphery and 1
An orifice plate having an orifice hole 7 in the center is sandwiched between the end and the connecting pipe 3 whose end is formed into a brim 47, and is tightened with a cap nut 46. 43 is O for ensuring airtightness
It's a ring.

The gas fire extinguishing equipment according to the second embodiment of the first invention of the present application is such that, in the event of a fire, the container valves 2, 2, ... When opened, the extinguishant storage containers 1, 1, ...
A gaseous extinguishant with a pressure of 0 MPa (about 200 kgf / cm2) flows out, but when it passes through the orifices 11, 11, ... Falls. In this case, when the pressure on the upstream side of the orifice 11 is a high pressure of, for example, 20 MPa (about 200 kgf / cm2), the pressure on the downstream side of the orifice 10 is set to a medium pressure of about 10 MPa (about 100 kgf / cm2).
It is the same as in the first embodiment described above that it is easy to determine the dimensions. The pressure drops to an intermediate pressure, flows through the connecting pipes 3, 3, ..., The collecting pipe 4, and then the main pipe 5 to reach the branch pipes 8, 8 ,.
The fire extinguishing agent reaching 7, ... Is radiated into the atmosphere from here, and fills the fire extinguishing target compartment to suppress the fire. With this structure, the pressure of all the pipes including the connecting pipes 3, 3, ..., The collecting pipe 4, the main pipe 5 and the branch pipes 8, 8 ,. It has become possible to significantly reduce costs.

FIG. 3 shows a first embodiment of the second invention of the present application, a gas-based fire extinguishing facility having a plurality of fire extinguishing target compartments. In FIG. 3, reference numerals 1, 1, ... Denote extinguishant storage containers filled with high-pressure inert gas.
Connection ports 3 and 3 are connected to the outlets of the container valves 2, 2 and so on, and the ends of the connection pipes 3 and 3 are further connected to the collecting pipe 4. At the tip of the collecting pipe 4, the selection valves 9-1, 9-2, ..., 9-N ,. , And the selection valves 9-1, 9-2, ..., 9-N, ..
, 5-2, ..., 5-N, ..., and ejection heads arranged at important points inside the fire extinguishing compartments 6-1, 6-2 ,. 7-1, 7-1, ..., 7-2,
7-2, ..., 7-N, 7-N, ..., ... Branch pipes branching from the main pipes 5-1, 5-2 ,. 8-1, 8-1, ..., 8-2, 8-2 ,.
, ..., 8-N, 8-N, ...,. Further, the selection valves 9-1, 9-2, ..., 9-N ,.
And the main pipes 5-1 and 5-2 of each outlet, ...
Orifices 10-1 and 10-2 between -N, ...
Insert 10-N, ... In addition, in the gas fire extinguishing equipment, compared to the collecting pipe 4, the main pipes 5-1 and 5-
2, ..., 5-N, ... are usually very long.

FIG. 8 shows the orifices 10-1, 10-2, 1
0-3 ... shows a detailed example, and a flange joint 42 of a known structure in which the flange portion of the selection valve outlet 9 ′ and the main pipe 5 are connected by welding is provided between the flange surfaces, and the orifice hole 7 is formed in the center. Insert the opened orifice plate and tighten it with a plurality of bolts 44, 44 ... And nuts 45, 45. 43 and 43 are O-rings for ensuring airtightness.

Usually, the fire extinguishing target sections 6-1, 6-2, ...
.., 6-N, ... have different sizes, so there is a difference in the amount of the required extinguishant to be released. Therefore, when the fire extinguishing equipment is started, the fire extinguishing target sections 6-1 and 6-2. ...
Extinguishant storage container 1, which should be opened every 6-N ,.
Since the numbers of 1 and so on are different, the action of pressure relaxation also differs. The operation procedure of this fire extinguishing equipment and the action of pressure relief will be described below. FIG. 4 shows the fire extinguishing equipment of FIG.
It shows details including the piping of the starting gas pipeline, and shows an example in the case where the fire extinguishing target compartments are three compartments 6-1, 6-2 and 6-3. Here, the number of extinguishant storage containers to be opened is 5 for the extinguishing target section 6-1, 3 for 6-2, 6-
Assume 3 is one. 9-1, 9-2 and 9-3
Is a selection valve, and orifices 10-1, 10-
Main pipes 5-1 and 5 having different diameters through 2 and 10-3
-2 and 5-3 are connected. 12-1, 12-2 and 1
2-3 is a selection valve opening device, 13-1, 13-2 and 13
-3 is a starting gas container filled with an inert gas such as carbon dioxide, 14-1, 14-2 and 14-3 are solenoids for opening the starting gas container. And 3 are the numbers 1, 2 and 3 at the end of the fire extinguishing section
It corresponds to each. .. are gas lines for activation that control the opening of the selection valve and the extinguishant storage container, and the selection valve opening devices 12-1, 12-2, 12-3.
, And the container valves 2, 2, ..., And the non-return valves 16-1, 16-2, 16-3, 16-A and 1 at important points along the way.
6-B is inserted. The direction in which the non-return valve can pass is represented by the direction of the arrow in the figure. The number of extinguishant storage containers and the number of connecting pipes are each 5, and other equipment arrangements, that is, the collecting pipe 4, the ejection heads 7-1, 7-1, ...
7-2, ..., 7-3, 7-3, ... Branch pipe 8-1, 8
-1, ..., 8-2, 8-2, ..., 8-3, 8-3,
.., etc. are aligned with FIG.

In the event of a fire, if the fire extinguishing target area is, for example, 6-1 and the fire finder operates a push button (not shown) corresponding to this area, an electric signal is sent to the starting gas container. It is sent to the opening solenoid 14-1, and the solenoid 14-1 operates to open the starting gas container 13-1. The starting gas released from the starting gas container 13-1 passes through the non-return valve 16-1 and the starting gas line 15, and also passes through the non-return valves 16-A and 16-B.
2, the five extinguishant storage containers 1, 1, ... are opened, but the non-return valves 16-2 and 16-3 cannot pass through, so the selection valves 9-2 and 9- 3 never opens. The high-pressure inert gas fire extinguishant released from inside the fire extinguishant storage containers 1, 1, ... Flows out into the collecting pipe 4 through the connecting pipes 3, 3 ,. -1 and enter the main pipe 5-1.
At this time, the orifice 10-1 adiabatically expands and the pressure drops. In this case, when the pressure on the upstream side of the orifice 10-1 is a high pressure of 20 MPa (about 200 kgf / cm2), the pressure on the downstream side of the orifice 10-1 is 10 MPa.
It is easy to determine the size of the orifice 10-1 so that the medium pressure is about (100 kgf / cm2), as in the first embodiment of the invention. The fire extinguishing agent having a medium pressure due to a pressure drop flows in the main pipe 5-1 to reach the branch pipes 8-1, 8-1, ... And finally, the ejection head 7-
It reaches 1, 7-1, ... And is emitted into the atmosphere from here,
The fire extinguishing agent fills the fire extinguishing target section 6-1 to suppress the fire.

When the fire extinguishing target compartment is 6-2, when a fire finder operates a push button (not shown) corresponding to this compartment, an electric signal is sent to the starting gas container opening solenoid 14-2. The solenoid 14-2 operates to open the starting gas container 13-2. Starting gas container 13-
The starting gas released from No. 2 passes through the non-return valve 16-2, the non-return valve 16-B, the non-return valve 16-B, and the three extinguishant storage containers 1, 1 ,. But non-return valve 16
-B does not pass, so two of the extinguishant storage containers do not open, and non-return valves 16-1 and 16-3 do not pass, so the selection valves 9-1 and 9-3 cannot open. Absent. The high-pressure inert gas fire extinguishant released from inside the fire extinguishant storage container 1, 1, ... flows out to the collecting pipe 4 through the connecting pipes 3, 3, ..., and the selection valve 9-2 opened to the orifice 10. -2 to enter the main pipe 5-2, but at this time, the orifice 10-2 adiabatically expands and the pressure drops. In this case, when the pressure on the upstream side of the orifice 10-2 is a high pressure of, for example, 20 MPa (about 200 kgf / cm2), the pressure on the downstream side of the orifice 10-2 is set to 10 MPa (about 10 MPa).
Orifice 10- so that the medium pressure is about 0kgf / cm2)
It is the same as the case where the fire extinguishing target section is 6-1 that the size of 2 is easy to determine. The extinguishing agent having a medium pressure due to a pressure drop flows in the main pipe 5-2 and branches 8
-2, 8-2, ..., and finally the ejection head 7-2,
7-2, ... is emitted into the atmosphere from here, and the fire extinguishing agent fills the extinguishing target section 6-2 to suppress the fire.

When the fire extinguishing target area is 6-3, when a fire finder operates a push button (not shown) corresponding to this area, an electric signal is sent to the starting gas container opening solenoid 14-3. , The solenoid 14-3 operates and the starting gas container 13-3 is opened. Starting gas container 13-
The starting gas released from No. 3 passes through the non-return valve 16-3, the non-return valve 16-B, and only one extinguishant storage container 1 is opened. The four extinguishant storage containers of No. 1 and No. 9-2 do not open, and the non-return valves 16-1 and 16-2 do not pass, so the selection valves 9-1 and 9-2
Will never open. The high-pressure inert gas fire extinguishant released from the fire extinguisher storage container 1 flows out into the collecting pipe 4 through the connecting pipes 3, 3, ... And passes through the orifice 10-3 from the opened selection valve 9-3. , Enter the main pipe 5-3,
At this time, the orifice 10-3 adiabatically expands and the pressure drops. In this case, when the pressure on the upstream side of the orifice 10-3 is a high pressure of, for example, 20 MPa (about 200 kgf / cm2), the pressure on the downstream side of the orifice 10-3 is 10 MPa.
Similar to the case where the fire extinguishing target section is 6-1, it is easy to determine the size of the orifice 10-3 so that the medium pressure is about (about 100 kgf / cm2). The extinguishing agent having a medium pressure due to a pressure drop flows through the main pipe 5-3 to the branch pipes 8-3, 8-3, ... And finally, the ejection head 7
-3, 7-3, ..., It is radiated into the atmosphere from here, and the fire extinguishing agent fills the fire extinguishing target section 6-3 to suppress the fire.

With this structure, the pressure of the main pipe 5 and the branch pipes 8, 8, ... Which occupy most of the pipe can be relieved, and the cost of the pipe material can be significantly reduced. Became possible. In the above description, the pressure relaxation action in the orifices 10-1, 10-2 and 10-3 is the flow passing through the above-mentioned orifices depending on the inner diameter and flow rate of the main pipe in which the respective orifices are inserted. It is possible to perform the calculation by using the known formula (A) or (B) regarding the above, and to determine the opening area S of the orifice so that the optimum downstream pressure P2 is obtained for each orifice. That is, in the first embodiment of the second invention, the fire extinguishing target sections are set to 6-1 and 6
-2, ..., 6-N, ..., and plural valves 9-1, 9-2 ,.
.., 9-N, ... Main pipe 5 with different diameters for each fire target section
-1, 5-2, ..., 5-N, ... are connected, the opening area S of the orifice is selected according to the fact that the inner diameters and flow rates of the plurality of main pipes are different. To do. Therefore, although the pressure relaxation action in the orifices 10-1, 10-2 and 10-3, ... differs depending on the inner diameter and the flow rate of each main pipe, the pressure relaxation action by the provision of the orifice is the same as in the first invention. Is.

As shown in the second embodiment of the second invention of the present application, there are a plurality of fire extinguishing compartments having substantially the same size,
And it is an example when the inner diameter of each main pipe is equal,
Gas fire extinguishing equipment is shown in Fig. 5. In FIG. 5, 1, 1,
... is an extinguishant storage container filled with a high-pressure inert gas, and orifices 11 and 1 are respectively provided at the outlets of the container valves 2 and 2 attached to the extinguishant storage containers 1, 1 ,.
After inserting 1, ..., Connect the connecting pipes 3, 3 ,.
The ends of the connecting pipes 3, 3, ... Are further connected to the collecting pipe 4. In front of the collecting pipe 4, a plurality of fire extinguishing target sections 6-1, 6-2, ...
Select valves 9-1, 9- for 6-N, ...
2, ..., 9-N, ... are provided, and selection valves 9-1, 9- are provided.
2, ..., 9-N, ..
-2, ..., 5-N, ...
, 6-N, ..., 6-N, ..., jet heads 7-1, 7-1 ,.
Branch pipes 8-1, branching from main pipes 5-1, 5-2, ..., 5-N, ... to 7-N, 7-N, 7-N ,. 8-1, ..., 8-2, 8-2 ,.
, 8-N, 8-N, ...,.

In the case of the fire extinguishing equipment of the second embodiment of the second invention of the present application, when a fire occurs, for example, if the fire extinguishing target section is 6-N, first, this will be dealt with. The selection valves 9-N are opened electrically or pneumatically (both means not shown), and then the container valves 2, 2, ...
All storage containers 1, 1, ...
High-pressure, for example, 20 MPa (about 200 kgf / cm2) gaseous inert gas extinguishant flows out from inside, but the container valves 2, 2
When passing through the orifices 11, 11, ... inserted into the outlets of ..., adiabatic expansion occurs and the pressure is 10 MPa (about 10 MPa).
It becomes a medium pressure of about 0 kgf / cm2). The extinguishant that has flown into the connecting pipes 3, 3, ... And the collecting pipe 4 due to a pressure drop to an intermediate pressure flows through the main pipe 2-N through the selection valve 9-N and branches into the branch pipe 8-N. , 8-N, ..., Finally, the jet heads 7-N, 7-N, ..... are reached and emitted into the atmosphere from here, and the fire extinguishing agent fills the extinguishing target compartment to suppress the fire. .

In the case of the second invention of the second invention of FIG. 4, since the fire extinguishing target compartments have almost the same size, all the containers are opened, the flow rate is substantially constant, and the inner diameters of the main pipes are the same. It is not necessary to provide an orifice for each main pipe,
A small size orifice may be inserted on the outlet side of each container valve. With this configuration, the connecting pipes 3, 3, ...
..., the collecting pipe 4, the main pipe 2-N, and the branch pipes 8-N, 8-N,
It is possible to relieve the pressure of all the piping consisting of ..., and it is possible to significantly reduce the cost of piping materials.

[0030]

The gas fire extinguishing equipment of the present invention is equipped with an orifice in the middle of the pipe from the extinguishant storage container to the injection head (including the container valve outlet at the pipe end and the selection valve outlet at the main pipe end). Therefore, the high-pressure inert gas fire extinguishing agent causes a pressure drop when passing through the orifice, and as a result, the pressure inside the piping is relieved, and the cost of piping materials for most or all of the piping is greatly reduced. There is an effect that can be made.

[Brief description of drawings]

FIG. 1 is a piping diagram of a gas fire extinguishing facility showing a first embodiment of the first invention of the present application.

FIG. 2 is a piping diagram similar to FIG. 1 of a gas fire extinguishing facility showing a second embodiment of the first invention of the present application.

FIG. 3 is a piping diagram of a gas fire extinguishing facility showing a first embodiment of the second invention of the present application.

FIG. 4 is a piping diagram showing the gas-based fire extinguishing equipment of FIG. 3 with the piping of the starting gas pipeline added.

FIG. 5 is a piping diagram similar to FIG. 3 of a gas fire extinguishing facility showing a second embodiment of the second invention of the present application.

FIG. 6 is a vertical sectional view showing a first embodiment of an orifice mounting structure.

FIG. 7: Front view of the orientation plate

FIG. 8 is a longitudinal sectional view showing a second embodiment of the orifice mounting structure of the same.

FIG. 9 is a longitudinal sectional view showing a third embodiment of the orifice mounting structure of the same.

FIG. 10 is a piping diagram similar to FIG. 1 of a conventional gas fire extinguishing facility.

FIG. 11 is a piping diagram similar to FIG. 3 of a conventional gas fire extinguishing facility.

[Fig. 12] Piping diagram similar to Fig. 4 of a conventional gas-based fire extinguishing facility Explanation of symbols 1 Extinguishant storage container 2 Container valve 2'Container valve outlet 3 Connecting pipe 4 Collecting pipe 5 Main pipe 6 Extinguishing target compartment 7 Jet head 9 Selection valve 9'Selection valve 10 Orifice 11 Orifice 16 Non-return valve 40 Orifice hole 41 Orifice plate

Claims (4)

[Claims] 1. A fixed-type fire extinguishing facility that uses a high-pressure inert gas as a fire extinguishing agent, which is installed in a fire-extinguishing target compartment from an outlet of a fire-extinguishing agent storage container filled with the high-pressure inert gas. A fire extinguisher configured to suppress the fire by connecting a pipe to the fire extinguisher jet head and opening the fire extinguisher storage container so that the fire extinguisher flows in the pipe and the fire extinguisher ejects from the fire extinguisher jet head. In the equipment, a gas-based fire extinguishing equipment characterized by having an orifice in the pipe from the outlet of the extinguishant storage container to the inlet of the section to be extinguished. 2. The orifice provided in the pipe is provided at each outlet of the plurality of extinguishant storage containers, which is the end of the pipe on the extinguishant storage container side. Extinguishing equipment described. 3. A fixed-type fire extinguishing facility using a high-pressure inert gas as a fire extinguishing agent, which is installed in an extinguishing target compartment from an outlet of a fire-extinguishing agent storage container filled with the high-pressure inert gas. A pipe is connected to the extinguishant jet head, and when the extinguishant storage container is opened, the extinguishant flows in the pipe, and the extinguishant is configured to suppress the fire by discharging the extinguishant from the extinguishant jet head, And, there are a plurality of fire-extinguishing target compartments, each of which is provided with a selection valve corresponding to the fire-extinguishing compartment, the selection valve is connected to the extinguishant storage container outlet side pipe, and the corresponding selection valve outlet is provided. In a fire extinguishing facility configured to connect a pipe to a fire extinguishing agent injection head installed in a fire extinguishing target compartment, an orifice is provided in the pipe from the selection valve outlet to the corresponding fire extinguishing target compartment. Gas-based fire-extinguishing equipment which is characterized the door. 4. The orifice provided in the pipe is provided at the outlet of each of the plurality of extinguishant storage containers, which is the end of the pipe on the extinguishant storage container side. Fire extinguishing equipment.